47results about How to "Improve construction reliability" patented technology

The invention discloses a method for conveying slag and soil for excavating a foundation pit of a subway station. A set of corrugated sidewall belt conveyors is arranged. The corrugated sidewall belt conveyor includes a conveyor body and a belt storage mechanism; the conveyor body consists of a machine head. From the end to the end of the machine, there are the horizontal section of the nose, the inclined section of the body and the vertical section of the machine body; the horizontal section of the machine head is arranged on the ground foundation outside the foundation pit, and the vertical section of the machine body is arranged on the side wall of the continuous wall along the vertical direction. And its end is close to the bottom of the foundation pit; as the excavation depth of the foundation pit increases, the length of the corrugated sidewall conveyor belt of the belt storage mechanism section can be reduced; when it is necessary to continue to extend the length of the vertical section of the body, it can be shortened. The length of the horizontal section of the head, extending to the vertical section of the body. The construction method uses the corrugated sidewall conveyor to transport the muck, which can realize the continuous transportation of the muck, and can extend the length of the corrugated sidewall conveyor with the increase of the depth of the foundation pit. The degree of automation is high, the labor intensity of workers is low, and the muck High delivery efficiency.

The invention relates to a throwing type washable downhole pressure-bearing plugging device and a plugging method thereof. The throwing type washable downhole pressure-bearing plugging device and the plugging method thereof are applicable to constructions such as oil-water well tubular pile pressure testing, monolayer positioning and acidifying, layering acidifying, cementing and sand prevention. A downhole portion and a ground portion of the device are connected through an oil pipe, the downhole portion is provided with a cup assembly, the ground portion is provided with a fishing assembly, a fishing rod of the cup assembly is matched with a fishing cap of the fishing assembly so as to realize fishing the cup assembly. The cup assembly is manually placed into an oil pipe below a three-way barrel of the ground portion from the ground, is conveyed to a valve seat through an oil pipe pump, and can be fished by the fishing assembly of the ground portion when being washed. The throwing type washable downhole pressure-bearing plugging device can be used with a packer, a throttler and the like to realize acidifying, cementing and plugging construction of determining layers, and also can realize multilayer acidifying, plugging and sand prevention constructions through a tubular lifting pile. Whether the cup assembly is washed out or not is judged by observing moving positions of indicating screws, downhole working conditions can be conveniently judged, and construction is facilitated.

The invention discloses a fast-assembled energy-consuming filling wallboard, which belongs to the technical field of building construction equipment. It includes the first wallboard group at the end and the second wallboard group at the middle, the first wallboard group and the second wallboard group and the second wallboard group are connected together by tenon and tenon ; and the length of the mortise is greater than the depth of the mortise, so that the filled wall after splicing has vertical energy-dissipating joints of 15 mm to 25 mm, which can dissipate seismic energy. The thickness direction of the first wall panel group and the second wall panel group are respectively spliced ​​by two first wall panels and two second wall panels. When installing, rotate one wall panel vertically by 180 degrees to splice with the other. The cavity formed in the middle of the spliced ​​filling wall can be filled with thermal insulation material. The energy-consuming filling wallboard of the invention is easy to install, can greatly improve construction efficiency, can reduce environmental pollution and noise pollution in the construction process, and improve construction reliability.

The invention discloses a liquid nitrogen fracturing process method. The method comprises the steps that replacing accumulated fluid in a well to the ground from a fracturing pipe column; at the position higher than a reservoir to be fractured by the reserved distance, packing an annulus into an upper annulus and a lower annulus; blocking the bottom of the fracturing pipe column and the well bottom, and meanwhile enabling the fracturing pipe column to communicate with the lower annulus; opening the upper annulus for pressure relief, obtaining pressure in the fracturing pipe column, and after confirming that the upper annulus and the lower annulus are packed, opening the fracturing pipe column for pressure relief; blocking the bottom of the fracturing pipe column; under the condition of opening the pressuring pipe column, lowering a flow guide pipe from the fracturing pipe column, and pumping and injecting liquid nitrogen into the fracturing pipe column through the flow guide pipe untilthe interior of the fracturing pipe column is full of the liquid nitrogen, and achieving precooling of the fracturing pipe column; communicating a liquid nitrogen injection device with the fracturingpipe column, and pumping and injecting the liquid nitrogen; and when the fracturing pipe column communicates with a perforation segment, increasing the displacement to carry out fracturing. It can beensured that the low-temperature liquid nitrogen has the higher conveying efficiency and better heat preservation effect.

The invention relates to a drilling-plug free tubular column with sand control and well cementation for an open-hole horizontal well, which comprises an external tubular column and an inner tubular column. The external tubular column comprises a sand control screen (2), an open-hole packer (3), an external positioning step (4), an external cementing machine (5) and a sleeve tube (6) are sequentially installed and connected on the an acid-washing filling valve (1). The inner tubular column comprises an oil tube (8) and an inner cementing machine (7) which is installed and connected on the oil tube (8). The inner tubular column is arranged in the external tubular column and the inner tubular column and the external tubular column are mutually fixed sealed. The invention can simplify operating procedures and reduce the frequency of running string, and does not need to perform drilling-plug operation free after cementing for well cementation, and also has the advantages of low operating cost, large drift diameter, regular inner wall, clean well-hole of sand control and well completion, high construction success ratio, large construction stability, low labor intensity, high oil well yield and the like, and can be widely applied to the process of sand control, well cementation and well completion of the open-hole horizontal well for oil exploration.

A high-performance sand mist-containing sealing layer material and its preparation method belong to the road engineering technical field, and the material composition includes zwitterionic emulsified asphalt, suspension thickener, viscosity-increasing and toughening agent, film-forming agent, suspending agent, and preservative and anti-skid fine sand; the preparation method includes preparing a base material, preparing a concentrated solution of a sand-mist seal layer, preparing a high-performance sand-mist seal layer material and construction. The finger-drying time of the sand mist-containing sealing layer material obtained in the present invention is 10-30 minutes, the drawing strength at 60°C is 0.35-1.1 MPa, and the wet wheel abrasion value is 22.8-56 g / m 2 , Corundum 7 days of uniform suspension, service life of more than 3 years. The high-temperature drawing strength of the present invention is at least 20% higher than the existing traditional sand mist-containing sealing layer materials, which can solve the problems of poor high-temperature adhesion and poor wear resistance of existing materials, and has the advantages of short drying time, good maintenance effect, and easy to use. Long life and other advantages.

The invention relates to the field of underground silo facilities, in particular to a prefabricated underground silo compound shaft construction method and a silo structure which effectively improve the underground silo construction efficiency and greatly reduce the construction cost. The prefabricated underground silo compound shaft construction method comprises the following steps that a, paying off is firstly carried out in a silo building site to locate and arrange drill holes; b, freezing operation and bottom grouting are carried out; c, splicing assembly is carried out to form shaft structures; d, shoe leg heating pipes in shoe leg structures are used for hydrothermal circulation; e, structure shaft components are assembled step by step to form new shaft structures till the preset depth is achieved; f, bottom plates and supporting plates are mounted; g, all drill hole openings in the ground are closed; and h, debugging and running are completed, and construction is finally completed. The prefabricated underground silo compound shaft construction method and the silo structure are high in construction reliability and construction speed and especially suitable for being used in fields with the short construction period and limited construction space.

The invention relates to a rapid dewatering structure for pressurized water, which includes a well pipe, an air-filled pipe, and a water outlet pipe; a check valve is arranged in the well pipe, and the opening direction of the check valve is upward; and at least one seal is fixed outside the well pipe above the check valve The grouting pipe extends into the sealed bag; the water outlet pipe extends into the well pipe from top to bottom, and its lower end is above the check valve; one end of the inflation pipe extends into the well pipe, and the other end is connected to the pressure gas source. The present invention does not use a submersible pump, reduces the diameter of a single well, reduces the cost of a single well, improves the flexibility and adjustability of construction, improves the construction reliability, and simplifies the construction process; forms a high-strength sealed water-stop structure; adopts a filter section with a water-permeable structure outsourced The structure type can be prefabricated on the ground. After the hole is formed, the well structure is directly lowered and the well construction is completed after grouting and sealing. There is no need to fill filter materials, clay balls and other processes. Rainwater wells are economical to build and energy efficient to operate.

The invention discloses an underground excavation construction deformation control method for a three-hole small clear distance tunnel underpass trunk railway, and belongs to the technical field of tunnel (hole) shallow buried soil stratum construction. Firstly, construction surface subsidence control standards are determined according to the requirement of an existing trunk railway for track smoothness; secondly, construction schemes and construction parameters of the three-hole tunnel are tested and determined by the aid of three-dimensional finite element static and dynamic numerical values. Construction includes the steps: reinforcing lines; grouting and reinforcing the earth surface; constructing an advanced tube screen; constructing a tunnel portal; constructing a tunnel crevasse; grouting and reinforcing side walls and tunnel faces; excavating the tunnel; supporting the tunnel; forming a secondary liner of the tunnel; recovering the lines, and monitoring measurement is performed in the whole construction process. Construction quality is strictly controlled according to a predetermined scheme and process in the construction process, the construction parameters are timely fed back and adjusted by the aid of an information construction technology, and operation safety of existing lines and structural stability of the tunnel are guaranteed.