675 results about "Rubble" patented technology

The invention relates to a testing platform with ground and slope engineering module. Long edge at one side of the main structure side steel plate has an instrument burying hole and data leading out hole, the other side having viewing window, bottom of the rectangular structural module slot rubble and sand cushion having water pipe supply net that connects with the water tank and vacuum extraction device, one side of the short edge of the main body structural side steel plate having discharge hole, two sides of the main structural beam post overpass the latched the reverse beam, whose lower end having hydraulic jack, ball hinges and bearing plate formed servo bearing system, displacement sensor, sand pressure sensor and gap water pressure connected to form the monitoring system. It can be deployed to prevent disasters.

The production process of permeable high-strength concrete paver includes the steps of: the first making base layer via mixing cement 18-21 wt%, small rubble of 3-5 mm size 50-55 wt%, large rubble of 7-10 mm size 18-21 wt%, admixture 0.1-6 wt% and water in 0.2-0.23 weight of cement, molding and vibrating to form; and the subsequent making facing layer via mixing cement 15-22 wt%, quartzite 76-85 wt%, admixture 0.1-6 wt%, dispersible latex powder 0.2-0.6 wt% and water in 0.24-0.26 weight of cement, pouring the mixture onto freshly formed base layer, and vibrating to form; demolding; and curing to obtain the finished product. The permeable high-strength concrete paver has high strength, high water permeability and no need of baking, and may be used widely.

Anchoring systems for use in cavity wall structures having an inner wythe and an outer wythe constructed of rubble stone are disclosed. The anchoring system employs an anchor fastened to or set within the inner wythe that extends into the cavity and connects to a J-hook. A vertically adjustable veneer tie enwraps the J-hook, limiting lateral movement and front-to-back displacement, and is set within the bed joint of the outer wythe. The anchoring system minimizes cavity size and provides stability for an uncoursed outer wythe equivalent to that of anchoring systems for standards coursed bed joints.

Systems and methods are provided for locating a transmission signal from a radio transmission emitter device, such as a cell phone, in a rescue area. A pilot signal is employed to lock onto a transmission signal of one or more radio transmission devices located in a rescue area. A signal separation routine extracts desired transmission signals from emitter devices located in the rescue area from other signals coexisting on similar frequency bands and interfering with the desired transmission signals. An estimated location of transmission signals from emitter devices located in the rescue area is determined based on one or more transmission signal location techniques. The area is searched based on the estimated location of the transmission signal. If the emitter transmitting the transmission signal is not found, devices in the system are moved and the location estimation is repeated.

The invention discloses a self-cleaning water permeable brick comprising a surface material and a base material. The base material is weighed according to weight percentage, comprising 68.4 percent to 77.5 percent of rubble or building rubbish granule or slag, 10 percent to 25 percent of cement, and 5.3 percent to 12 percent of water. The surface material is weighed according to weight percentage, comprising 66.7 percent to 71.8 percent of high-intensity sand, 10.8 percent to 26.5 percent of cement, 3.4 percent to 10.4 percent of water, and 0.1 percent to 1.0 percent of nanometer titanium dioxide. The surface material and the base material are compacted together to form an integrated water permeable brick. The invention further discloses a preparation method of the self-cleaning water permeable brick. The method comprises the following steps: 1) the base material and the surface material are weighed, respectively premixed and then stirred as raw materials for standby application; 2) molding is carried out; 3) steam curing is carried out; and 4) liquid titanium dioxide is sprayed. Road surfacing of the self-cleaning water permeable brick in the invention can reduce water permeable hole plugging and surface pollution, thereby having the effects of road surface temperature decrease and high-efficient sterilization, regaining circulatory system of natural soil air and water, preventing soil pollution and improving ecological environment.

Systems and methods are provided for locating a transmission signal from a radio transmission emitter device, such as a cell phone, in a rescue area. A pilot signal is employed to lock onto a transmission signal of one or more radio transmission devices located in a rescue area. A signal separation routine extracts desired transmission signals from emitter devices located in the rescue area from other signals coexisting on similar frequency bands and interfering with the desired transmission signals. An estimated location of transmission signals from emitter devices located in the rescue area is determined based on one or more transmission signal location techniques. The area is searched based on the estimated location of the transmission signal. If the emitter transmitting the transmission signal is not found, devices in the system are moved and the location estimation is repeated.

The invention belongs to the field of building materials and in particular relates to recycled concrete doped with short-cut basalt fibers and recycled coarse aggregate. The recycled concrete is prepared from the following raw materials in parts by weight: 100-300 parts of water, 300-500 parts of ordinary Portland cement, 500-700 parts of medium sand, 500-650 parts of natural gravels, 500-650 parts of recycled coarse aggregate, 30-50 parts of fly ash, 1-5 parts of a water reducing agent and 1-6 parts of short-cut basalt fibers. The recycled concrete provided by the invention is low in preparation cost, and the obtained concrete has high temperature resistance, corrosion resistance, tensile strength, crack resistance and better durability property.

The invention relates to a karst area drilling cast-in-place pile structure which is characterized in that a cast-in-place pile, a bag grouting body and a prestress anchor cable are included; an original karst portion is backfilled with a clay and rubble mixture; the top of the cast-in-place pile is provided with a pile top expansion pile body, and a karst position is provided with the bag grouting body; a squeezing reinforcement cage is arranged in the bag grouting body; prestress anchor cable holes are formed around the cast-in-place pile, and the top of the prestress anchor cable penetrates through the pile top expansion pile body. The karst area drilling cast-in-place pile structure has the advantages of being quick in construction speed, low in cost and the like. Besides, the bearing capacity of a single pile is enhanced by changing the action mechanism of the cast-in-place pile, and the aim of solidifying a foundation is achieved. The invention further discloses a construction method of the karst area drilling cast-in-place pile structure.

Anchoring systems for use in cavity wall structures having an inner wythe and an outer wythe constructed of rubble stone are disclosed. The anchoring system employs an anchor fastened to or set within the inner wythe that extends into the cavity and connects to a J-hook. A vertically adjustable veneer tie enwraps the J-hook, limiting lateral movement and front-to-back displacement, and is set within the bed joint of the outer wythe. The anchoring system minimizes cavity size and provides stability for an uncoursed outer wythe equivalent to that of anchoring systems for standards coursed bed joints.

The invention relates to a waterproof and anti-corrosion repair mortar for a polymer cement-based concrete structure, in particular to a cement concrete repair material for a cement concrete structure, which is used for carrying out bonding reinforcement and repair on defects of municipal roads, municipal services, bridges and water conservancy projects (dams and gates). The waterproof and anti-corrosion repair mortar is prepared by mixed materials and water, and the mixed materials comprise the following components in parts by weight: 20-30 parts of portland cement, 0.01-0.05 part of high-performance water-reducing agent, 1-5 parts of high-aluminum cement, 15-30 parts of quartz sand, 25-60 parts of gravel and 1-3 parts of acrylic adhesive powder, 1-3 parts of fiber material, while the using amount of water accounts for 5-14% of the total parts of the mixed materials. Due to the adoption of the technical scheme, the waterproof and anti-corrosion repair mortar has the characteristics of good pressure resistance, high flexural strength, high bonding strength, good durability, convenient and fast construction, fast setting and early strength shrinkage control, and can greatly shorten the repair time and quickly resume the traffic in particular to roads.

The invention discloses a jet ore washing equipment for drum-type crushed stone screening, which comprises a water storage tank, an ore washing shell, an ore washing net cylinder, a spiral blade, a high-pressure jet hole and a hollow rotating shaft. The bottom of the ore washing shell is welded There is a water storage tank, the bottom of the water storage tank is welded on the support frame, the inner bottom of the water storage tank is set as a water storage tank, and the filter residue net is installed on both sides above the water storage tank, and the upper end of the filter residue net is connected to the separator, and the two ends of the separator are equipped with Slag drop hole; the ore washing shell is equipped with an ore washing net cylinder, and the ore washing net cylinder is respectively connected to the feeding cover and the discharge cover through the rotating guide sleeve, so that the hollow rotating shaft and the ore washing net cylinder can be driven to rotate at the same time. The hollow rotating shaft is opposite to the rotation direction of the ore washing net cylinder and is combined with the flushing of the high-pressure jet hole, which has a good cleaning efficiency and effect on the ore; after cleaning, the water flows into the water storage tank to realize water recycling; the ore washing net cylinder effectively filters out the ore The slag in the filter can improve the screening effect of the crushed stone.

Electronic components, including a transceiver for two-way wireless communications, are carried by a freely roaming animal such as a rat. Electrodes are implanted in the brain of the animal to provide cues and rewards to the animal to achieved desired behaviors, including controlling the direction and speed of movement of the animal, and training the animal to recognize odors. The electronics can include network interface components that allow a network of the animals to work together. Sensors carried by the animal provide information to a remote base-station regarding, e.g., heading and location. Other sensors, such as a video camera, microphone, and chemical or gas detector, provide information regarding an environment of the animal. The animal can carry out missions such as searching for people buried in rubble piles, law enforcement operations, and detection of explosives, chemicals or other dangerous materials. A vehicle for deploying the animal is also provided.

The invention discloses steel slag asphalt graded crushed rock mixture. The steel slag asphalt graded crushed rock mixture comprises the following components in percentage by weight: 90-93 percent of aggregate particle, 4-6 percent of asphalt and 3-4 percent of limestone mineral powder, wherein the aggregate comprises the following four grain compositions in percentage by weight: 21-24 percent of grain composition 1, 20-28 percent of grain composition 2, 19-25 percent of grain composition 3 and 32-37 percent of grain composition 4; the granularity of the grain composition 1 is smaller than or equal to 31.5mm and larger than 19mm, the granularity of the grain composition 2 is smaller than or equal to 19mm and larger than 9.5mm, the granularity of the grain composition 3 is smaller than or equal to 9.5mm and larger than 4.75mm, and the granularity of the grain composition 4 is smaller than or equal to 4.75mm and larger than 0mm; and the aggregate is steel slag or the mixture of the steel slag and limestone. Proved by experiments, the mixture has the advantages of low cost, reasonable granularity grain size distribution, water proof performance and good stability.

The invention relates to anti-freezing concrete and belongs to the field of concrete. The technical problem to be solved by the invention is to provide the concrete with better anti-freezing performance. The anti-freezing concrete comprises the following components in parts by weight: 325-350 parts of cement, 320-800 parts of sand, 435-1085 parts of gravel, 70-95 parts of preservative and 22-26 parts of TS type anti-freezing agent, wherein the preservative is at least one of 75-grade pulverized mineral powder, fly ash and silica fume. The anti-freezing concrete has the advantages of better anti-freezing performance, low cost and simple construction method, thereby providing a new choice for the field and having broad application prospects.

The invention relates to a road surface structure of a road project. The mass composition of the invention is that: 0-20 parts of polyurethane,0-20 parts of alkyd, 0-20 parts of methyl-methacrylate resin, 20-50 parts of substrate pitch,10-20 parts of compatiblizing agent, 2-5 parts of rheological agent, 1-5 parts of ultraviolet aging resisting agent, 10-30 parts of curing agent, 10-20 parts of gravel and 50-200 parts of colorful wear-resistant rubble. The invention is characterized by simple formula, easy manufacture, strong adhesive capacity, good antiskid capacity, and good low-temperature property and does not crack in cold areas of the northern. The structure can be applied to laying the surface of the tunnel (especially the tunnel surface 200-300m away from the entrance and exit of the tunnel), bridge, airport pavement, bending section of the senior road and the repair of the used cement concrete pavement.

The invention discloses a device for detecting leachate leakage and a leakage position in a refuse landfill. The device comprises an electric wire network, a PVC (polyvinyl chloride) sleeve network and a high-density resistivity meter, wherein the electric wire network is composed of an X-direction electric wire array extending along the X direction and a Y-direction electric wire array extending along the Y direction; PVC sleeves are sleeved outside electric wires in the electric wire network to correspondingly form the PVC sleeve network, and the sleeve wall of each PVC sleeve is provided with holes through which leachate flows in and out; and the electric wire network and the PVC sleeve network are respectively arranged in a second-layer rubble layer in the refuse landfill or a lower-layer soil body of a leakage-proofing layer, and the X-direction electric wire array and the Y-direction electric wire array are respectively and electrically connected to the input end of the high-density resistivity meter which is positioned outside the refuse landfill. The device for detecting leachate leakage and the leakage position in the refuse landfill can be used for detecting the leachate leakage as well as detailed leakage position and range.

The invention discloses a method capable of being used for rain water seepage-filtering, collection and storage and purification in a sponge city.The method comprises the steps of firstly, selecting an appropriate position, excavating a foundation pit of a biological detention pond and water storage wells, and laying open vertical-rim stone strips 5-10 cm away from the two sides of the road surface of the biological detention pond.The biological detention pond comprises a rubble cover layer, a vegetation planting soil layer, a charcoal filler layer and a gravel drainage layer in sequence from top to bottom, and seepage-proof films are laid at the periphery and the bottom of the biological detention pond.An overflow pipe is laid on the gravel drainage layer, an overflow port in the upper end is 5-10 cm higher than the rubble cover layer, and the lower end is connected with a municipal drainage pipe network.The system can be applied to the places such as a residential area, a campus, a parking lot, a park and a road, rainwater can be collected and stored, the content of pollutants such as nitrogen, phosphorus and heavy metal in the rainwater can be reduced, the recycling purpose is achieved, finally, urban inland inundation is effectively alleviated, and rainwater utilization efficiency is improved.

The invention discloses the application of a thermal pipe-crushed stone protection slop composite roadbed with the functions of temperature reduction and thermal insulation in a broad width high-grade road. The composite roadbed comprises sealed L-shaped thermal pipes, crushed stone protection slops, insulating layers and roadbed filling, wherein the crushed stone protection slops are laid on side slopes on both sides of the roadbed until reaching a natural earth's surface; the L-shaped thermal pipes are embedded in the roadbed filling, and ammonia or nitrogen is used as working media in the pipes; and the insulating layers are embedded in the underground roadbed filling. By utilizing the changes of angles of the condensation segments and the evaporation segments of the L-shaped thermal pipes in the roadbed, the composite roadbed lowers the temperature of soil bodies under the center of the roadbed; and by combining the advantages of the crushed stone protection slops and the thermal insulating layers, the composite roadbed increases the cold energy suction volume in a cold season and effectively controls the heat absorption capacity in a warm season, thereby realizing the temperature reduction of the underlying soil bodies of the broad width high-grade roads, balancing a temperature field, increasing the upper limit of frozen soil, and meeting the special requirement of roadbed stability of perennial high temperature permafrost regions.

The invention relates to a widened embankment structure with a beside-water cliff high retaining wall fill section. The widened embankment structure is mainly composed of an original pavement structure, a transverse connecting reinforcement cage, grouted stiffeners, a new widened part pavement structure, a diagonal brace, a mortar rubble slope, a reinforced concrete continuous slab and a pre-stressed pipe pile, wherein the reinforced concrete continuous slab and the diagonal brace are arranged on the top of the pre-stressed pipe pile; one end of the diagonal brace is connected with the top of the pre-stressed pipe pile, while the other end of the diagonal brace is connected with a panel of an existing cantilever retaining wall; the grouted stiffeners are arranged on the base plate of the existing cantilever retaining wall and the bottom of the reinforced concrete continuous slab; the transverse connecting reinforcement cage is arranged between the panel of the existing cantilever retaining wall and an new widened embankment; a waterproof layer is paved on the upper parts of the reinforced concrete continuous slab and the grouted stiffeners, and a light embankment and the new widened part pavement structure are orderly cast on the waterproof layer; a slope protecting waterproof layer and the mortar rubble slope are arranged outside the slope of the new widened part pavement structure. The widened embankment structure with the beside-water cliff high retaining wall fill section is used for effectively solving the problem that the widening construction cannot be implemented as the existing cantilever retaining wall cannot be removed.

The invention discloses a dry-mixed mortar, which comprises the following components in parts by weight: 120 parts of cement, 700 to 800 parts of scree artificial sand, 80 parts of coal ash and 4 parts of additive, wherein the scree artificial sand is made of broken scree through a sand making machine or other sets of equipment; and the fineness modulus of the scree artificial sand is 2.3 to 3.0. The raw material of the dry-mixed mortar is the scree artificial sand; the particle shape and the grading of the scree artificial sand are high, and the moisture content is low, so that the scree artificial sand can be used for preparing the dry-mixed mortar without being dried; and moreover, the hardness of the scree artificial sand is greater than that of rock artificial sand, so that the dry-mixed mortar is low in cost and high in quality and has obvious economic benefit.

The present invention belongs to a building material, in particular to a self-concretion material of steel residue powder and coal ash. The self-concretion material of steel residue powder and coal ash is characterized in that: the material is made of the mixing with steel residue, coal ash powder, industrial waste gypsum and alkaline catalyzer; the molar of the industrial waste gypsum is 1-15 percent of the total molar of the steel residue, coal ash powder, industrial waste gypsum and alkaline catalyzer; the molar of the alkaline catalyzer is 0-3 percent of the total molar of the steel residue, coal ash powder, industrial waste gypsum and alkaline catalyzer; the molar ratio between the steel residue and the coal ash powder is 1: 2-4: 1. (The material can not only be used alone, but also be used for stabilizing the road base of detritus and grit and the building brick.) The material is characterized in low cost.

The invention discloses a biologicalpurificationretention belt for a sponge-type city municipal road and a construction method of the biologicalpurificationretention belt. The biologicalpurificationretention beltcomprises waterproof geotechnical cloth, a rubble water purification layer, water-permeablegeotechnical cloth, an improved soil water purification layer, an antiscouring layer, an overflow well, a water collection pipe and a transverse connection pipe which are sequentially arranged in an isolation belt of the sponge-type city municipal road from bottom to top, wherein the overflow well is arranged in the center of the isolation belt; the water collection pipe is arranged in the rubble water purification layer in the longitudinal direction of the sponge-type city municipal road; the transverse connection pipe communicates with the bottom of the overflow well; the overflow well penetrates through the waterproof geotechnical cloth, the rubble water purification layer, the water-permeablegeotechnical cloth, the improved soil water purification layer and the antiscouring layer, and communicates with the water collection pipe; and the transverse connection pipe is arranged in the transverse direction of the sponge-type city municipal road. The biologicalpurificationretention belthas the water drainage, water permeation, water retention, water storage and water purification functions, can be used for municipal roads and arterial highways around cities, enables municipal roadsto be changed into sponge-type city municipal roads, and promotes the development of sponge-type cities.

The invention relates to a crushing and sorting device, in particular to a broken stone crushing and sorting device for road construction. The broken stone crushing and sorting device for road construction can perform crushing treatment on broken stone to a certain extent and obtain required stone materials through screening and has a fast screening process. The broken stone crushing and sorting device for road construction comprises a bottom plate and the like; supporting rods are vertically connected to the left side and the right side of the top of the bottom plate; a first fixing plate is arranged on the left side of the top of the supporting rod on the right side; a crushing mechanism is installed on the front side of the first fixing plate; a second fixing plate is connected to the supporting rod on the right side; and the second fixing plate is located on the top of the bottom plate. Through mutual cooperation of the crushing mechanism and a sorting mechanism, the stone materials are crushed and screened to a certain extent, and meanwhile by optimizing a vibrating mechanism and a clearing mechanism, the effects that crushing treatment is performed on broken stone to a certain extent, the required stone materials are obtained through screening, and the screening process is fast are achieved.

Belonging to the field of sludge recycling disposal, the invention in particular relates to a plant-growing pervious concrete system for sludge recycling disposal and a preparation method thereof. The method includes: fully mixing rubble, zeolite, vermiculite, ceramsite, porous silicon dioxide microspheres, a cementing material, an acidic admixture and water, and conducting insertion tamping molding to obtain a base material I; carrying out sieving and dehydration on sludge to obtain a slurry II; fully mixing the slurry II with a permeable conditioning agent and a fluidity conditioning agent, and filling the base material I with the obtained mixture so as to obtain a base material II; fully mixing the slurry with a curing agent and a modifier, and performing curing, thus obtaining a material IV; covering the surface of the base material II with a material IV, and sowing grass seeds thereon, thus obtaining the plant-growing pervious concrete system. The invention aims at sludge recycling disposal, and realizes sludge recycling disposal. The obtained plant-growing pervious concrete system can be widely applied to in rive bank slope protection projects, road edge protection projects, and sponge city construction projects.

The invention discloses a construction method of a gravel grouting pile. The construction method comprises the following steps: (1) preparing for construction, (2) conducting measurement, paying off and positioning of the pile, (3) embedding a protective canister, (4) placing a drilling machine in place, (5) forming a hole by drilling, (6) cleaning the hole at a time, (7) placing a grouting pipe, (8) placing an anchor bar, (9) putting gravels in the hole, (10) installing a pile cap connecting steel pipe, (11) cleaning the hole, (12) conducting pressure grouting, (13) pulling the grouting pipe out, (14) constructing a pile cap, and (15) conducting detection and acceptance inspection on the finished pile. According to the construction method of the gravel grouting pile, the construction speed is high, the construction period is shortened, and compared with soft foundation treatment such as a prestressed pipe pile and a Y-type pile, the engineering investment is saved; the labor intensity is low, the construction is safe, and the construction method can be widely popularized and used; the gravel pile formed by cement and gravels is high in integrality and stability. The engineering drilling machine is adopted in a soft foundation to drill the hole in a rotating and cycling mode to form the pile, the disturbance to the foundation and the surrounding buildings is small, ground depression is controlled, and the construction method is small in vibration and low in noise during the construction and has good social benefits.

The invention belongs to construction material,Which provides material components and weight percentage rate of a baking-free brick with red mud and flyash are: 22-40 of the red mud, 20-35 of the flyash, 20-40 of aggregate, 8-12 of lime and 1-3 of plaster.With the aim of realizing the largest utilization quantity of the red mud and economizing the cost, through the researches and experiments, the invention uses the red mud and the flyash as main material and uses grit and friable rubbles as the aggregate so as to facilitate compressive strength of the products; the lime and the plaster is added to improve plasticity of the blank material, strength of a semi-finished blank brick and the compressive strength of the products. The invention can satisfy the utilization performance of the products and at the same time completely can meet the national standard requirement, thus solving the problem of the environmental pollution caused by the discharge of the red mud in larger sense.

The invention relates to a large-sized seedling transplanting construction device, and belongs to the technical field of landscape construction. The large-sized seedling transplanting construction device comprises soil balls (1), a flexible permeable hose (2), rubble (3), a sand prevention net (4), mixed loam (5), planting soil (6), a PVC (polyvinyl chloride) exhaust pipe (7), a retaining ring (8), a covering (9), a wood board (10), pillars (11), burlap (12) and a trunk (13). The device can transplant all kinds of large-sized seedlings, ensure the robustness of plants, improve the survival rate of the transplanted seedlings, purify air, reduce dust and noise hazards, and adjust the temperature and humidity of air, and is in line with national energy saving and environmental protection requirements.

The invention relates to a sub-aqueous construction, especially providing a construction method of artificial island or sea wall. It comprises: A, using a group of basic posts and a group of plate-plate connectors connecting nearby basic posts to construct inner water-proof wall underwater along the figure of sub-aqueous construction; B, using a group of post-plate connectors and a group of rib baffles connecting nearby post-plate connectors to from outer wall which is connected to the inner wall via positioning beam, and the space between them is filled by rubble stone to form foundation platform; C, arranging a wave-baffle on the lower wall of the construction which is higher than foundation platform; D, filling stuffing into lower wall; E, building upper wall on the stuffing to form wave-baffle wall; F, filling stuffing at the inner side of wave-baffle wall again to set height. The stuffing in said invention generally is water-free soil, to form water-proof base to confirm the seawater not wash out the stuffing inside the artificial island or sea wall from lower part. In addition, the side near to sea of island or sea wall is constructed into multi-step structure to eliminate wave step-by-step to confirm the safety of island and sea wall.

The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method for an inverted arch of a VI-level water-enriched surrounding rock tunnel, which aims to solve the problems of low efficiency and high safety hazard in construction of the inverted arch of the VI-level water-enriched surrounding rock tunnel. The construction method comprises the following steps of: reinforcing a tunnel face of a lower bench temporarily, laying a layer of counter pressing rubbles on a to-be-excavated inverted arch section, and constructing steel plate piles on one side close to the tunnel face; excavating a first section of the inverted arch, erecting an inverted arc trestle bridge, and constructing preliminary bracing for the first section of the inverted arc; excavating a second section of the inverted arch, constructing preliminary bracing for the second section of the inverted arch, and meanwhile, constructing a tunnel lining for the inverted arch; filling the constructed inverted arch; and removing the steel plate piles. The construction method provided by the invention has the beneficial effects that the construction safety is high, and the hazard of tunnel face sloughing of the tunnel is lowered effectively; and the method is simple, is easy to organize, and improves a construction progress effectively on the premise of ensuring a safe step pitch.

The invention discloses an LID (low impact development) type rainwater ditch and a design and calculation method for the same, and is applicable to various rainwater drainage ditches such as drainage ditches, farmland drainage ditches and floodwater drainage ditches on two sides of a slope and two sides of a road. The rainwater ditch comprises a ditch, storage dams, overflow ports, a rubble layer, a sandy soil layer, ecological slopes and the like. The sandy soil layer is laid on a bed of the ditch, the rubble layer is laid on the upper side of the sandy soil layer, and the storage dams are longitudinally continuously arranged along the ditch and are separated from one another by a certain distance, so that a series of reservoirs which are continuously distributed are formed along the ditch. The design and calculation method includes designing and calculating layout spacing of the water storage dams and the sizes of the overflow ports. The LID type rainwater ditch and the design and calculation method have the advantages that the LID type rainwater ditch has multiple functions of 'drainage, water storage, infiltration and decontamination', and is incomparable to a hard rainwater ditch only with a drainage function; the LID type rainwater ditch is high in water storage capacity and drainage speed which are deficient in a wetland bed type rainwater ditch; the rainfall flood runoff volume can be obviously reduced, the groundwater recharge can be improved, non-point surface pollutants of rainwater can be reduced, and environments can be beautified.