30results about How to "Reduce seepage" patented technology

Provided are a slant grouting control steel anchor pipe frame and a construction method thereof. A primary grouting body is poured to the peripheral space of a steel anchor pipe through a primary grouting pipe; after the primary grouting body is solidified, a secondary grouting body is poured to the outside through a secondary grouting hole in the steel anchor pipe wall in a compression mode, the secondary grouting body splits the primary grouting body through the secondary grouting hole and is diffused to a peripheral rock and earth mass and forms a mixed grouting body with the primary grouting body. A concrete beam is poured along a slope to wrap the top of the steel anchor pipe in the beam. The slant grouting control steel anchor pipe frame combines the advantages of an anchor rod frame and a grouting control technology, the steel anchor pipe is used as a protection measure and a secondary grouting channel, and by means of improvement of the strength of the peripheral rock and earth mass through the secondary grouting, a steel pipe and the peripheral rock and earth mass form a whole body to defend a slope together. A slant grouting control steel anchor pipe frame structure has the advantages of being advanced in technology, reasonable in economy, fast in construction and the like and is a novel slope reinforcing technology with good developing prospects.

A drilling fluid additive comprised of ground canola meal that decreases seepage loss and fluid loss of the fluid to permeable formations. The canola meal is ground to particle sizes between about 10 and 1250 microns, in particular, between about 100 to 1000 microns. This product can be added to oil or water based drilling fluids. It is environmentally safe, reduces torque and drag on a drill string, and provides viscosity in the system. The additive has a high return permeability and acid degradability.

The invention discloses a tunnel portal section pre-reinforcement and excavation construction method based on partition blasting. The construction method comprises the following steps of 1, precipitation pre-reinforcement; 2, earth surface pre-reinforcement, and specifically, reinforcing the surface of a backfill section in a construction tunnel portal section through adopting a cement soil stirring pile; and 3, tunnel excavation construction, and specifically, carrying out excavation construction from rear to front in a plurality of excavation sections, wherein the process comprises the following steps of surveying and setting out, performing drilling and blasting construction, excavating an upper portal body, excavating a middle portal body and excavating a lower portal body. The construction method is reasonable in design, simple and convenient in construction and good in use effect; the underground water level is reduced through precipitation pre-reinforcement, and then surroundingrock is effectively reinforced; after the backfill section is subjected to surface pre-reinforcement through using the cement soil stirring pile, a three-step synchronous excavation mode is used forcarrying out partition blasting excavation, so that it is ensured that the tunnel excavation process is safe and reliable and a tunnel structure is stable.

The invention discloses a drill hole fluid sealing method for coal mine gas extraction. A water injection pipe is installed in an extraction pipe and is provided with a closed branch pipe penetrating through the extraction pipe and a one-way valve, a plug is installed on the surface of the extraction pipe and located on two sides of the one-way valve respectively, the water injection pipe is provided with a pressure gauge and a main valve, and an inner cavity is filled with a sealing fluid. The extraction pipe is put in a drill hole, the valve is turned on for water injection, and when pressure rises to reach a certain pressure, the main valve is closed. The water injection pipe is connected with a lower-pressure water source, water flow slow-seeping seal is continuously conducted on the drill hole, and gas extraction concentration data is observed every day. The drill hole fluid sealing method uses a cementitious viscous fluid and water as hole sealing materials to replace traditional solids based on 'solid seals colloid, colloid seals liquid and liquid seals gas', the compactness of a hole sealing section is effectively improved, and the purpose of improving a hole sealing effect is achieved.

The invention relates to a building curtain wall structure, in particular to a green environment-friendly building curtain wall structure. The green environment-friendly building curtain wall structure comprises a building body, wherein side baffles are respectively fixed to the side edges of a roof of the building body, the side baffles at the side edges are connected end to end in sequence so as to define a water collecting pool, a support plate set is arranged in the water collecting pool, a soil covering plate is in lap joint with the support plate set, a plurality of water falling holes are formed in the soil covering plate, a planting soil layer is laid on the soil covering plate, green plants are planted on the planting soil layer, water absorption cotton threads are buried in the planting soil layer, the water absorption cotton threads penetrate through the soil covering plate and then are stacked in the water collecting pool, a plurality of water diversion pipes are connected to each side baffle, and the water diversion pipes penetrate through the building body and is connected with a water supply pipeline in the building body. According to the green environment-friendly building curtain wall structure, the recycling of rainwater is achieved.

The invention provides a pump station foundation pit integrated drainage system. The system is characterized in that a circle of cement soil seepage interception wall is arranged outwards at intervals along the outer side line of a foundation pit to form a closed seepage interception wall body, the cement soil seepage interception wall penetrates through a permeable layer, and the bottom of the cement soil seepage interception wall extends to the position 2 m below a relative impervious layer; on the outer side of the foundation pit with the closed space formed by the cement soil seepage interception wall, a circle of out-pit pressure reduction wells is constructed outwards along the cement soil seepage interception wall, and the bottom elevation of the pressure reduction wells is located at the bottom elevation of the permeable layer; an in-pit drainage well is constructed in the foundation pit, and the bottom elevation of the drainage well is located at the bottom elevation of the permeable layer; and the pump station foundation pit integrated drainage system is jointly formed by the cement soil seepage interception walls, the out-pit pressure reduction wells and the pit interior drainage well, a closed seepage interception wall is formed by the cement soil seepage interception walls, the underground water level in a foundation pit is reduced to be 0.5 m or below of a design base through the drainage drainage well, and the water head difference between the interior and the exterior of the foundation pit is kept within the range of 7 m through the drainage pressure reduction well. The dewatering and drainage requirements of the foundation pit of the large pump station can be met, and dry land construction conditions are created.

A reference point determinator determines, as a reference point, the center of each pixel where a sloped line is located. A candidate line generator generates candidate lines each connecting between a point in a pixel having the start point of the sloped line extracted by an endpoint extractor, and a point in a pixel having the end point of the sloped line. A candidate line selector selects a candidate line having the smallest sum total of distances between the candidate line and the reference points from the candidate lines generated by the candidate line generator. A data corrector corrects the sloped line to the candidate line selected by the candidate line selector.

The invention discloses a multi-stage linkage collecting device and method for ore leaching liquid in a heap leaching field of a metal mine. The multi-stage linkage collecting device for ore leaching liquid in the heap leaching field of the metal mine comprises a plurality of ore leaching liquid collecting systems laid between adjacent material layers of the heap leaching field, a plurality of communicating pipelines correspondingly connected with the output ends of the ore leaching liquid collecting systems one to one, and conveying pipelines correspondingly connected with the output ends of the plurality of communicating pipelines. Each ore leaching liquid collecting system is formed by connecting a plurality of collecting pipes in a crossed mode, the input ends of the communicating pipelines are correspondingly connected with the collecting pipes on the outermost layers of the ore leaching liquid collecting systems, and the output ends of the conveying pipelines are connected with a liquid collecting pool. By means of the mode, the bottom end of each layer of the heap leaching field is provided with the ore leaching liquid collecting system, the ore leaching liquid is conveyed through the same conveying pipeline, recycling linkage of multi-stage ore leaching liquid can be achieved, and the seepage time and distance of the ore leaching liquid in the heap leaching field are shortened.

The invention discloses a single well zipper type fracturing gas testing construction method which comprises a fracturing period and a whole well open flow period, in the fracturing period, multi-section fracturing operation is carried out in the daytime and open flow operation is carried out at night, the multi-section fracturing operation and the open flow operation are carried out alternately, and the whole well open flow period is carried out after the multi-section fracturing operation is carried out in the daytime in the last day. The method is easy to operate, environment-friendly, energy-saving and emission-reducing, the construction period can be effectively shortened, the operation cost is saved, and the problems that the normal-pressure gas reservoir flow-back energy is insufficient, reservoir water damage is serious, and the single-well flow-back liquid sewage treatment cost is high are solved.

The invention provides a reinforced composite geotechnical cushion capable of preventing the capillary barrier effect and a manufacturing method thereof. The composite geotechnical cushion is formed by sandwiching a gravel and hemp thread layer, a hot-melt plastic wire layer and a reinforced grating layer. The reinforced composite geotechnical cushion is used in the side slope embankment filling anti-sliding reinforcement project and is particularly suitable for a side slope embankment filling project in a region with more rainwater in the south, the capillary barrier effect of infiltration rainwater at the reinforced layer can be remarkably reduced or eliminated, the infiltration speed of the rainwater can be increased, the seepage along the slope surface can be reduced, and the infiltration damage of soil mass can be avoided; and meanwhile, the composite geotechnical cushion can also improve the anti-sliding performance of the side slope soil mass and reduce the risk of landslide.

The invention provides a breathable super absorbent polymer (sap) coating composite material for preventing slope surface infiltration and a manufacturing method thereof. The sap coating composite material is sandwiched by a sap coating honeycomb grille, a three-dimensional partition layer, and a reinforced permeable layer, the sap coating composite material is used in slope embankment filling surface waterproofing engineering and is particularly suitable for slope embankment filling engineering in areas with more rain in the south, seepage failure caused by infiltration of rainwater to the slope embankment can be significantly reduced or eliminated, drainage of rainwater from the surface of the slope embankment is accelerated, seepage flowing down the slope surface is reduced, soil body seepage damage is avoided, when the weather is fine, the sap coating composite material can shrink so that honeycomb ventilation holes are opened, and excessive moisture in the slope embankment is drained; and at the same time, according to the sap coating composite material, the anti-sliding performance of the slope soil body can be further improved, and the risk of landslides is lowered.

The invention discloses a multi-stage centrifugal pump with a residue filtering and removing function for liquid drainage, and relates to the technical field of centrifugal pumps. The multi-stage centrifugal pump with the residue filtering and removing function for liquid drainage is characterized in that a fixing block is connected to a threaded rod at the output end of a motor, a scraping plateis connected to the lower end of an L-shaped rod on the side surface of the fixing block, a first filter screen connected with the side wall of a cavity is arranged at the lower end of the scraping plate, a water pump is prevented from being blocked by garbage, the working efficiency is improved, and meanwhile, follow-up sewage treatment is facilitated; and a second filter screen and a third filter screen are connected to a first spring and a second spring in a first sliding groove and a second sliding groove respectively, a third sliding groove and a fourth sliding groove corresponding to thesecond filter screen and the third filter screen respectively are formed in a supporting plate, a third spring in the third sliding groove is connected with the second filter screen, a fourth springin the fourth sliding groove is connected with the third filter screen, a fourth filter screen is embedded in the supporting plate, and the water pump is arranged on the bottom surface of a mounting cavity, so that garbage collection is facilitated, and water in the garbage can be pumped back into the centrifugal pump.

The invention discloses a green plant caring device. The green plant caring device comprises a liquid storing device and a soaking device, wherein liquid is stored in the liquid storing device, and an opening is formed in the lower portion of the liquid storing device; the soaking device is connected with the liquid storing device through the opening and goes deeply into roots of a green plant; under the action of gravity, the liquid passes through the opening in the lower portion of the liquid storing device and is released to the roots of the green plant through the soaking device to be absorbed by the green plant. The green plant caring device is convenient to use, free of power, capable of achieving comprehensive caring including water, nutrient solution and chemicals, efficient, multipurpose, wide in application range and capable of widely applied to urban landscaping, landscaping, and green plants in remote regions and courtyard, saves time and labor and saves water.