111 results about "Soil core" patented technology

A multi-sensor system rapidly measures diffuse reflectance of soil, soil conductivity, and other soil properties in situ, in three dimensions. The system includes a tractor-drawn implement containing a sensor shank used for X-Y axis measurements, a hydraulic probe implement containing a sensor probe for −Z axis measurements, and a set of visible and near-infrared spectrometers, controls, and firmware that are shared by each implement. Both implements include optical sensors and soil electrical conductivity sensors. The probe implement incorporates a sensor that measures insertion force, and the shank implement includes a soil temperature sensor. These combinations of sensors are used to calibrate the system and to characterize the soil properties within a field or area. Geo-referenced soil measurements are collected with the shank implement to identify optimal locations for conducting sensor probe insertions. The probe implement is then used for sensor probing and for collecting soil core samples for lab analysis.

Determination of hydraulic properties such as porosity and permeability of soil is of paramount importance in hydrology and civil engineering. In order to achieve greater accuracy in determination of permeability of soil using falling head permeameter, the two important known constraints of human monitoring error in noting the falling water level between two selected levels and elapse time between these two levels had overcome through electronically sensing the levels between two selected points and activating the timer clock automatically by the pulses coming from senor. The precision in measurement of time lapse in 1 / 100th a second enables greater accuracy in estimation of permeability. Provision of perforated Teflon disc above and below the soil core facilitates in application of water uniformly over the entire surface area of soil core at top and similar way permeated water leaving the soil core uniformly without any obstruction. The use of carbon steel seamless tube while collecting soil core facilitated in undisturbed soil core recovery from desired depth section. The permeability test was conducted for various sorted sands of different size ranges and each sample was subjected to repetitive tests and elapsed time for each test was recorded from timer unit. Coefficient of Permeability was calculated for each test. The lab experiment conducted for sorted and unsorted sediments has yielded a consistent performance of Electronic level sensor and timer based falling head soil permeameter.

The invention discloses a double-layer steel sheet pile soil core composite cofferdam structure without an inner support and the application of the double-layer steel sheet pile soil core composite cofferdam structure without an inner support, and belongs to the field of water conservancy projects. The double-layer steel sheet pile soil core composite cofferdam structure without an inner support comprises an upstream-face steel sheet pile and a downstream-face steel sheet pile, and the space between the steel sheet piles is filled with cohesive soil to form a cofferdam; a composite geo-membrane is laid on the portion, inside the cofferdam, of the upstream-face steel sheet pile; the upper portions of the two steel sheet piles are connected through a pull rod, middle beams are arranged outside the steel sheet piles, and the pull rod is connected with the middle beams through bolts arranged outside the corresponding middle beams. When the filling cofferdam core cohesive soil is in the same level with the pull rod, the space between the steel sheet piles is further filled with a layer of hairy residues, and a sub-cofferdam is arranged on the upstream-face steel sheet pile. The cofferdam structure can be used for building strip-shaped subsurface structures in a river or lake through the open-cut method. The cofferdam structure is stable and safe, and the problem that a steel sheet pile flexible structure is large in deformation is solved by arranging the pull rod on the tops of the two steel sheet piles; a three-level waterproofing system improves the anti-penetrability performance of the steel sheet pile cofferdam significantly.

A walk aerator comprises a frame supported by a plurality of ground engaging wheels, the frame carrying a coring head having a plurality of side-by-side tine assemblies. The wheels define a wheelbase which is substantially equal to or less than the width of a coring swath and the wheels are located in advance of the coring head to keep the wheels from passing over the holes or soil cores left in any preceding coring swathes formed by the aerator. The vertical position of the coring head is adjustable up and down as the ground contour changes to keep hole depth substantially constant. The tine assemblies are reciprocated by a single crankshaft driven by a single pulley, the crankshaft being assembled from multiple crank arms that are splined and bolted together. Sealed bearings connect drive arms that drive the tine assemblies to the crankshaft. The crankshaft can be disassembled to allow the sealed drive arm bearings to be replaced. Integral core deflectors are used on the drive arms. A connecting link extending across each drive arm is used to connect each drive arm to the coring head to decrease the coring head depth.

The invention provides a high-frequency hydraulic vibratory construction method for a cement-soil core-inserted combined pile. The high-frequency hydraulic vibratory construction method is a foundation reinforcing method, and includes forming a hole in a soil squeezing mode by a traditional immersed tube or drilling a hole by long spiral equipment, and filling stirred cement-soil mixtures into the drilled hole to for a pile; or directly forming a cement-soil pile by a stirring pile machine, immersing a rigid core pile into the uncured cement-soil pile by a high-frequency hydraulic vibratory hammer after cement-soil forms the pile, and forming the novel pile comprising the cement-soil pile and the core pile which jointly bear load. Compared with the prior art, the high-frequency hydraulic vibratory construction method has the advantages that the construction speed is high, the noise and the manufacturing cost are low, pollution is prevented, the quality of the formed novel pile is stable, and the formed novel pile is high in load bearing capacity. Besides, the construction efficiency is ten times of that of a common piling machine, the cost is saved by about 30% to 50% as compared with a precast pile, and is saved by about 40% to 50% as compared with a drilled grouting pile, and the high-frequency hydraulic vibratory construction method has substantial social and economical benefits.

A walk aerator comprises a frame supported by a plurality of ground engaging wheels, the frame carrying a coring head having a plurality of side-by-side tine assemblies. The wheels define a wheelbase which is substantially equal to or less than the width of a coring swath and the wheels are located in advance of the coring head to keep the wheels from passing over the holes or soil cores left in any preceding coring swathes formed by the aerator. The vertical position of the coring head is adjustable up and down as the ground contour changes to keep hole depth substantially constant. The tine assemblies are reciprocated by a single crankshaft driven by a single pulley, the crankshaft being assembled from multiple crank arms that are splined and bolted together. Sealed bearings connect drive arms that drive the tine assemblies to the crankshaft. The crankshaft can be disassembled to allow the sealed drive arm bearings to be replaced. Integral core deflectors are used on the drive arms. A connecting link extending across each drive arm is used to connect each drive arm to the coring head to decrease the coring head depth.

The invention relates to a deep mucky riverbed pipe gallery river crossing dual-steel-plate pile cofferdam structure; upstream and downstream of a river are provided with dual-steel-plate piles; each dual-steel-plate pile is enclosed by two lines of Larsen steel plate piles, the inner parts of the Larsen steel plate piles are connected through channel steel circuit purlin split bolts and a tie bar; adjacent Larsen steel plate piles are connected through a lock opening; the riverbed sludge between two steel plate piles is compacted and grouted to form compaction grouting soil; the inside walls of the dual-steel-plate piles are provided with the channel steel circuit purlin split bolt; one layer of anti-seepage film is arranged at inside of each dual-steel-plate pile, and a layer of bagged soil closes to the anti-seepage film; ash mixing soil is filled between the dual-steel-plate piles layer by layer. The deep mucky riverbed pipe gallery river crossing dual-steel-plate pile cofferdam structure has the beneficial effects that on the basis of waterproof dual-steel-plate piles, the ash mixing soil core with good anti-seepage ability is arranged between dual-steel-plate piles; the anti-seepage film is further arranged; the substrate of the ash mixing soil core is compacted and grouted to further improve the substrate waterproof effect, thus the waterproof effect of the whole cofferdam is improved through multiple waterproof effects.

The invention discloses an immature soil coil-filling type traditional folk house wall reinforcing structure and a reinforcing method. The structure comprises fixation steel plates, transverse steel ribs and vertical steel ribs, every two fixation steel plates form a group and are respectively arranged at brick columns at the two sides of a wall, and each group of fixation steel plates are disposed at the same horizontal position; the groups of fixation steel plates are bound and fixed together through two transverse steel ribs, and the two transverse steel ribs are respectively disposed at the inner wall surface and the outer wall surface of the wall; and the inner wall surface and the outer wall surface of the wall are also respectively provided with the vertical steel ribs, and the vertical steel ribs and the transverse steel ribs are vertical to each other and are respectively welded and fixed to all the transverse steel ribs from bottom to top. According to the reinforcing structure and the method, effective connection can be increased between a loam wall and the brick columns, the wall and the brick columns form effective binding, and expansion of cracks between immature soil and the brick columns can be effectively inhibited, the anti-shear performance of an immature soil core-filling wall is improved, and the integrity and the stability of the immature soil and the brick columns can be enhanced.

The invention discloses a method for rapidly and simply measuring the cement content of cement soil. The method comprises the following steps that: stirred cement slurry is taken at a construction field and brought back to a laboratory to be sealed and stored inside a soil package; after reaching certain period, on-site core sampling is carried out on a cement stirring column, a high pressure rotary spraying stake and the like at the construction field, a core sample is sealed and brought back to the laboratory, and simultaneously the air exhaust saturation is carried out on the cement slurry sample stored in the laboratory and the core sample taken back from the on-site core sampling; the mass, the volume, the density and the moisture content of each testing sample are tested; the mass of a cement hydration product is calculated according to the fact that the saturated cement soil is composed of three parts, i.e., soil grains, the cement hydration product and free water, and according to a density equation and a volume equation of a saturated cement soil core sample; and the quantity of mixed cement is calculated so as to obtain a cement mixing ratio. The detecting method has the advantages of being easy and reliable in operation and high in operability / of great easiness, high reliability and high operability and the like, and has a wide application prospect.

The invention relates to a method for constructing a highly plastic clay core wall, belonging to methods for constructing novel dams at areas which are rich in water resources and soil materials and are suitable for constructing the dams by the local materials. The method includes the following steps: (1) clearing filling bedding surfaces; (2) laying highly plastic clay belts on the filling bedding surfaces, and laying gravel and soil core walls among the highly plastic clay belts; and (3) rolling and compacting the highly plastic clay belts and the gravel and soil core walls. The method is suitable for using the highly plastic clay to construct the gravel and soil core walls of anti-seepage bodies of the dams, and the dams which are constructed by the method through filling can meet the requirements of designed functions and the requirement on deformation.

The invention discloses a tunneling method and a tunneling machine. The tunneling method includes simultaneously drilling a plurality of holes in the circumferences of rock faces; simultaneously drilling a plurality of holes beside each drilled hole along the corresponding distribution circumference of the drilled hole; repeating the steps until the circumferences are perforated to form rock and soil cores, and crushing the rock and soil cores; carrying out the same steps until the tunneling depth meets preset requirements. The corresponding holes beside each drilled hole are tangential to the drilled hole or are intersected with the drilled hole. The tunneling machine comprises a framework, a drilling device and a drilling propulsion device. The drilling device is positioned at the front end of the framework and comprises a disc, a plurality of drill rods and hydraulic motors, the drill rods are positioned on the disc and are uniformly distributed along the circumference of the disc, the hydraulic motors are arranged a the tail ends of the drill rods, the various drill rods can simultaneously drill holes along a tunneling direction, and the disc can be axially and rotationally adjusted. The tunneling method and the tunneling machine have the advantages that the tunneling method is high in tunneling speed and low in engineering manufacturing cost as compared with an existing method; the tunneling machine is applicable to the tunneling method, and is low in equipment weight and simple in structure as compared with an existing tunneling machine.

The invention relates to the investigation technology of civil engineering, in particular the measurement of the side shift of post resulted from excavating basic hole. Said method comprises following steps: (1) selecting posts which are need detected before excavating the basic hole, and clear the soil core in the post; (2) inserting the gradient pipe into the hole of post; (3) filling the filling material between the gradient pipe and the hole of post to make the gradient pipe side shift and distort simultaneously with the post; (4) measuring the initial position of gradient pipe in different depth before the distortion of post resulted from excavating the basic hole, and the measured value is initial value; (5) measuring the altered position of gradient pipe in different depth momentarily after excavating the basic hole, and the measured value is the altered value; (6) subtracting the initial value from the altered value to attain the side shifting value of post.

The invention discloses a method for making a cored building material block by using solidified soda residue soil, belonging to the field of civil engineering. The cored building material block is prepared from a solidified soda residue soil core material, a mortar or concrete external coating material and an internal division wall through the steps of solidified soda residue soil core material making, mortar or concrete making, pressure forming, curing and the like. The solidified soda residue soil is a hardenite which has certain strength, is capable of fixing harmful substances in soda residue soil to reduce or eliminate the harmful substance leaching phenomenon along with water and is formed by uniformly blending a curing agent and soda residues (waste residues of waste liquid discharged in the process of producing soda by using an ammonia-soda process) and subjecting the curing agent and the soda residue soil to a physical-chemical reaction. Waste liquid and waste residues discharged in the industrial production process of soda are effectively utilized, and the reduction, harmlessness and reclamation of the soda residues are realized.

The invention discloses a large-diameter thin-wall cylindrical pile mesh combined structure with pile caps and a construction method thereof. The structure comprises large-diameter thin-wall cylindrical piles, a geogrid, an earthfill road embankment and pile caps, wherein the plurality of large-diameter thin-wall cylindrical piles are inserted into a soil body; a pile cap is built on the upper end of each large-diameter thin-wall cylindrical pile or a pile cap is built on the upper ends of the plurality of large-diameter thin-wall cylindrical piles; the geogrid is built on the upper ends of the pile caps; the earthfill road embankment is built on the geogrid; and the diameter of the large-diameter thin-wall cylindrical piles is 1 to 2 meters. The invention has the advantages that: the advantage of flexibly forming various forms of the cylindrical piles is taken fully, the function of a soil core is fully played according to the characteristics of the pile caps of the large-diameter thin-wall cylindrical piles, and settlement is further relieved.

An intact core sample from a soil area, such as a golf green or a ball field, is embedded in molded plastic. The core sample first is obtained, and then adhesively bonded together prior to molding it in clear plastic to preserve the soil core sample in an intact and durable fashion for subsequent visual examination of the composition of the soil core sample.

The invention discloses an experimental device for simulating solidification of a cement sheath in a frozen soil stratum, and belongs to the field of oil and gas well cementing. The device comprises adevice main body, a pressure system and a measurement system; the main body comprises a fixed plate, a detachable plate and a device chassis; a round hole is formed at the center of the base; a central post or a thermal sleeve is mounted on the base by the round hole; and the fixed plate, the detachable plate, the device chassis and the central post or the thermal sleeve form a cavity for preparing a core and the cement sheath. When the device is in use, the device is placed in a low-temperature environment, the frozen soil core with a middle hollow cylinder can be man-made and tripped into athermal sleeve seat, cement is added to simulate a solidification working condition of the cement sheath under an actual stratum condition, and meanwhile, extrusion of heat transfer on the frozen soil stratum and creep of frozen soil to the cement sheath in the solidifying process of the cement sheath and the solidification condition of the cement sheath are measured by a temperature sensor, a strain gauge and an acoustic wave. The experimental device has the advantages of low cost, high efficiency, easiness for use and the like.

The invention discloses a telescopic settlement pipe, and a settlement deformation monitoring system and method, wherein the telescopic settlement pipe comprises a first pipeline and a second pipelinewhich are mutually inserted; the first pipeline is located above the second pipeline, and a gap at the joint of the first pipeline and the second pipeline is filled with a sealing element; a transverse plate is arranged on the periphery of the lower portion of the first pipeline and is perpendicular to the axis of the first pipeline. The method and system are used for solving the problems that inthe prior art, for a soil core wall rock-fill dam with the dam height larger than 150 m, the settlement monitoring is high in requirements for the burying precision of the settlement pipe, the settlement pipe cannot be normally observed due to extrusion, excessive bending, hole clamping and other factors, and an electromagnetic settlement ring is prone to demagnetization; according to the invention, deformation can be adapted under the high confining pressure condition, and the purpose of adapting to the high rock-fill dam core wall settlement deformation monitoring effect is achieved.

The invention discloses an embedded pipe for sampling a pile tip of a filling pile, which belongs to the field of in-situ concrete filling piles for fixing building foundations. Coaxial sleeves of the embedded pipe are pasted on the inner side of a steel reinforcement cage of the filling pile; the internal diameter of the embedded pipe is no less than the diameter of a drill bit of a core drilling and sampling machine; a top elevation of the embedded pipe is the same as that of the steel reinforcement cage; a bottom elevation of the embedded pipe is higher than the end elevation of the filling pile; and the two ends of the embedded pipe are blocked off. According to the embedded pipe, core drilling equipment can conveniently penetrate through a pile body through the embedded pipe to directly drill and obtain a pile tip core sample and a bearing course rock soil core sample; the concrete quality at the pile tip, the sediment condition and the supporting course condition can be evaluated; and detection modes and data are enriched, so that the building quality can be better ensured.

The invention discloses a waterproof rock soil core drilling tool which comprises a drilling tool outer pipe (5) and a reamer (4) connected with the drilling tool outer pipe (5). An advance spray drill bit (1) is connected with the reamer (4); one end of a rock core semi-closed inner pipe coupling (2) is located on an inner side base of the advance spray drill bit (1), and the other end is connected with a rock core semi-closed inner pipe (3); the upper end of the rock core semi-closed inner pipe (3) is connected with a liquid flow one-way ball valve (6); an inner-out pipe joint (8) is arranged in the drilling tool outer pipe (5): a liquid flow through hole (10) is arranged on the inner-outer pipe joint (8); and a rock core semi-closed inner pipe position adjusting mechanism is arranged between the inner-outer pipe joint (8) and the rock core semi-closed inner pipe (3). According to the invention, as the flow path of the drilling fluid flow is changed so that the drilling fluid does not scour the rock core directly, the water-sensitive rock soil core easily dissolved in the drilling fluid is protected, the rock soil core recovery is increased, the waterproof rock soil core drilling tool can ensure 100% of rock soil core recovery, and the quality of the drilling engineering is improved.

The invention relates to a gravelly soil core material blending device, and belongs to the field of water resources and hydropower engineering. The gravelly soil core material blending device comprises a rotary cylinder, and a driving mechanism for driving the rotary cylinder to rotate. The rotary cylinder and the driving mechanism are arranged on a machine frame. A walking mechanism is arranged at the bottom of the machine frame. A bucket is fixedly connected with and arranged on the outer wall of the rotary cylinder. In implementation, the device is operated after soil and gravel are laid, soil and gravel are shoveled up, lifted and dropped, and soil and gravel rotate along with the rotary cylinder and turn in the bucket after being shoveled up; when separated from the bucket to fall, soil and gravel continuously hit the outer wall of the rotary cylinder and continuously hit each other and are mixed together, and then the blending aim is achieved through multiple times of the process; the rotary cylinder advances together with the machine frame, and blending of the whole material stack is completed. The gravelly soil core material blending device is simple in structure, convenient to operate, low in cost and capable of achieving the continuous blending aim.

The invention relates to a technology for monitoring the blending quality of gravel soil material in the core wall of a rockfill dam with a gravel soil core wall, and aims to solve the shortcomings of the current information collection method for the backhoe blending operation information of the rockfill dam core wall with a gravel soil core wall and the technology problem. The present invention relates to a backhoe blending remote action acquisition system and method for core wall mixed with gravel soil materials. The system includes a mobile station, a data center and a monitoring center; the specific steps are: 1), multi-source information collection and preliminary processing for backhoe blending operations ; 2), using data communication based on cellular mobile communication technology to transmit the collected data to the data center; 3), blending operation information integration, storage and alarm; 4), video synchronous playback and on-site management. The invention is mainly applied to the occasion of monitoring the quality of mixing gravel soil material in the core wall of a rockfill dam with a gravel soil core wall.

The invention provides a test device and test method for simulating contact surface seepage coupling characteristics, and belongs to the technical field of earth and rockfill dam construction.The testdevice comprises a test cavity defined by a cylinder body, a top cover and a bottom plate, and the test cavity comprises an original graded soil sample cavity and a pressure cavity formed in the periphery of the original graded soil sample cavity in a sealed mode; the original graded soil sample cavity and the pressure cavity are separated through an elastic sealing layer, a rotating concrete shaft is arranged in the middle of the original graded soil sample cavity, and the concrete shaft is connected to a secondary speed reducer through a horizontal belt transmission device and then connected to a motor with the adjustable rotating speed. An upper permeable plate and a lower permeable plate for accurately simulating seepage characteristics are respectively arranged at the upper end and the lower end of the original graded soil sample cavity. The problems of high loading torque, difficult coupling loading, difficult water stopping and the like faced by the test device for simulating the stress deformation seepage coupling characteristic between the original graded gravel soil core wall material of the earth and rockfill dam and the bank slope contact surface are solved, and the problems of small geometric dimension of existing equipment and poor accuracy of obtained test data are avoided.

The invention relates to a coring device for roadbed soil and a method for installing a moisture sensor by using the coring device. The object of the present invention is to solve the problem that thesoil compactness of a portion tested by a probe in the prior art often fails to meet the compactness requirement of the roadbed, so that the test accuracy of volumetric moisture content is affected,soil core sample is prone to loose in the process of lowering a moisture sensor with the soil core sample, the moisture sensor can be damaged easily in a layered compaction and backfilling process, and water can easily enter the moisture sensor during long-term monitoring. The coring device comprises a blade body, a confinement ring, a cushion block and a plurality of top wires; the outer side wall of a annular cylinder body is provided with a limiting protrusion of the confinement ring, wherein the confinement ring is an annular sleeve body, and the confinement ring is sleeved on the top endof the blade body; and the cushion block covers on the blade body and the confinement ring. The method comprises / includes: step 1, drilling and sampling; step 2, coring; step 3, inserting the moisturesensor; step 4, assembling a core sample; step 5, installing the core sample; step 6, backfilling the soil; step 7, sealing the hole. The coring device for roadbed soil and the method for installingmoisture sensor by using the coring device are used in the field of roadbed monitoring.

The invention discloses an environment-friendly dismantling construction method for a two-layer steel sheet pile and soil core composite cofferdam. The method comprises the following steps that a, refuse in a cofferdam field is removed and sub cofferdams are dismantled; b, a service road is removed; c, a cofferdam core soil preserving foundation pit is dug; d, water is retuned to the cofferdam to reach the lake surface elevation; e, a downstream face steel sheet pile is pulled out; f, cofferdam core soil is dug out; g, an upstream face steel sheet pile is pulled out; and h, a fence is pulled out, the lake surface is cleaned, and construction is finished. The method is safe and reliable in construction, high in economic benefit, environmentally friendly and small in pollution on surrounding.

A double-tube single-acting valve type core and soil sampling device is a tool for sampling the full section soil core and undisturbed soil sample of the foundation soil in a building field. The core and soil sampling device is applicable for cohesive soil, silty soil and powder fine sand, the core sampling and the soil sampling can be accomplished at the same time in a drilling process, the device can prevent the core and the soil sample from dropping off and accurately control the drilling depth, the rock core sampling rate can meet the requirements stated by criterion (the core sampling ratio of the cohesive soil being not less than 80%, and that of the sand soil being not less than 65%), and the soil sampling quality is superior to that of the normal (thick wall) soil sampler, the drilling efficiency is obviously higher than that of the normal core and soil sampling device.

The invention discloses a soil salinity sampling detection device, which comprises a vehicle body, a walking wheel device, a soil sampling device, a vertical-horizontal conversion device and a soil detection device, when a mounting column is in a vertical state, a drill rod motor drives a drill rod to rotate, and the drill rod drills into the ground for soil sampling. After the drill rod completes soil sampling, the drill rod leaves the ground. The first motor drives the first gear to rotate so that the mounting column can be switched from the vertical state to the horizontal state, and the drill rod is correspondingly in the horizontal state. The placing plate moves to the opening of the drill rod, the air pump pressurizes the drill rod to transfer the soil core from the drill rod to the placing plate, and the telescopic rod descends to insert the soil salinity sensor into the soil core for soil salinity detection. After the soil core at the current position completes soil salinity detection, the vehicle body goes to the next to-be-detected position through the walking wheel device for soil sampling and soil salinity detection, and the technical problem that an existing outdoor soil salinity detection device needs manual soil sampling at multiple positions is solved.

The invention relates to a rapid sealing assembly with drawstring buckling for a star soil coring soft bag, and belongs to the field of star catalogue drilling and sampling mechanisms. The rapid sealing assembly with drawstring buckling for the star soil coring soft bag solves the problem that when sampling operation is carried out on an existing moon exploration project, a sealing journey of a sampling soft bag in the sealing process is long and affects the star soil collection quantity. A second sealing opening is located between a first sealing opening and an opening end of the coring softbag, wherein the first sealing opening comprises a first inhaul cable and a second inhaul cable, the two inhaul cables are used as wraps and symmetrically weaved on the coring soft bag, and the two ends of each inhaul cable are used as extending segments extending out of the coring soft bag. One extending segment of the second inhaul cable is wrapped with one extending segment of the first inhaulcable and buckling is performed, and the other extending segment of the first inhaul cable is wrapped with the other extending segment of the second inhaul cable and buckling is performed. First fracturing areas are arranged on the inhaul cables, the end part of the other extending segment of the first inhaul cable and the end part of the extending segment of the second inhaul cable are fixedly connected with limiting rings, and the first sealing opening and the second sealing opening have same structures.

An intact core sample from a soil area, such as a golf green or a ball field, is embedded in molded plastic. The core sample first is obtained, and then adhesively bonded together prior to molding it in clear plastic to preserve the soil core sample in an intact and durable fashion for subsequent visual examination of the composition of the soil core sample.

The invention provides an intact soil core collection device for determining soil volume weight of a marsh wetland and an application method of the intact soil core collection device and relates to the intact soil core collection device and the application method thereof, aiming at solving the problems of soil compaction in a current marsh wetland soil core collection process. The device providedby the invention comprises an acrylic cylinder, a cutting head part, a plunger piston and a rubber cap. According to the intact soil core collection device of the marsh wetland, provided by the invention, a rubber piston is combined with a sharp razor, so that plant root systems and organic residues, which are not completely decomposed, can be effectively cut in an inserting process. The transparent acrylic cylinder is visually inspected so that the position of the piston is effectively controlled through upward pulling a wooden T-shaped handle, and furthermore, a suction force is generated inthe acrylic cylinder. Finally, an undisturbed intact soil core of the marsh wetland is obtained and the compaction difficulty in an intact soil core collection process of the marsh wetland is completely solved; the device provided by the invention is simple to operate and low in cost and can be widely applied to sampling and research work of the intact soil core of the marsh wetland in China.