574 results about "Geomembrane" patented technology

The invention relates to the technical field of engineering, in particular to a geomembrane defect detection system and method under the earth and stone medium coverage condition, and the geomembrane defect detection system comprises a multi-mode adaptive sensing module, an edge calculation module, a data fusion module, a digital twinning module and a decision and application module; compared with the defects that single resistivity or geological radar detection is adopted in the prior art, interference of medium conductivity and metal impurities is likely to happen, and the deep resolution is insufficient, the scheme adopts multi-mode sensor network cooperative work, and a dynamic density layout and time-phased acquisition strategy is combined; through multi-mode complementation of an electrode array, an ultra-wideband radar, a distributed optical fiber and an MEMS vibration sensor, a dominant sensing mode is automatically switched in a conductive clay area, temperature gradient interference is avoided through night acquisition, the penetration depth is increased to 15 meters through multi-band radar fusion, and metal interference is inhibited; the detection precision and the anti-interference capability in a complex medium environment are remarkably improved, and the problems of high false alarm rate and high omission ratio of a traditional method are effectively solved.

The invention relates to the technical field of experimental devices for testing diffusion coefficients, in particular to an experimental device for testing the gas diffusion coefficient of a geomembrane and a testing method.The experimental device comprises a gas supply mechanism, a testing mechanism and a stretching mechanism, the testing mechanism comprises a reaction testing cylinder, and the reaction testing cylinder comprises an upper cavity and a lower cavity; one side of the lower cavity communicates with the air supply mechanism, a containing assembly is arranged between the upper cavity and the lower cavity, and the clamping assembly of the stretching mechanism is detachably connected to the middle of the containing assembly. The problem that the gas diffusion coefficient test of the geomembrane under the coupling action of aging and tensile stress cannot be simulated in the prior art is solved, and a reliable experimental device is provided for evaluating the long-term anti-seepage performance of the geomembrane under the actual working condition.

The invention discloses a preparation method of composite geotechnical cloth, belongs to the technical field of geotechnical material processing, and solves the problems of insufficient interlayer bonding strength, poor permeation stability and incapability of adapting to regional differentiation mechanical requirements in the traditional process. According to the method, two layers of synthetic fiber geotextile and a layer of polymer geomembrane are selected, and a gradient needling machine is adopted to implement a double-station gradient needling process, specifically, thick needle needling pre-reinforcement is synchronously conducted on the upper side and the lower side till the membrane thickness is 50-60% of the depth, then fine needle needling finishing is conducted till the membrane thickness is 70-80% of the depth, the needling density is preset to be 20-70 needles / cm according to different stress areas of a membrane material, and the needling density is 20-70 needles / cm according to different stress areas of the membrane material; in the process, data of needling depth, needling density and membrane material tension are collected in real time through a dynamic monitoring system, parameters are automatically adjusted, and finally a stable structure is formed through heat setting treatment at 120-140 DEG C for 8-12 minutes. The composite geotextile prepared by the method has a high-strength bonding interface and excellent anti-seepage performance, and is suitable for the engineering fields of water conservancy project anti-seepage, road base reinforcement, refuse landfill isolation and the like.

The invention discloses a laying device and laying method for a rain and sewage diversion covering material in a fly ash landfill reservoir area, and relates to the technical field of laying of landfill reservoir area covering materials.The laying device comprises a bottom plate and a fixing frame, main wheels are arranged on the two sides of the fixing frame, and a winding roller is arranged in the fixing frame; and the geomembrane material is wound on the circumferential outer wall of the winding roller. In the rotating process of a second rotating column, multiple sets of cams on the outer wall of the second rotating column can be driven to rotate together, at the moment, through extrusion between the cams and rolling wheels, pressure can act on a rotating frame and a pressing roller, and then secondary pressing on a geomembrane material can be achieved through the pressing roller; the stability of geomembrane materials laid in a reservoir area is guaranteed, the faster the device rolls, the larger the centrifugal force borne by the cam is, then the larger the pressing force applied to the rolling wheel is, and therefore the pressing force of the pressing roller on the geomembrane materials changes along with the rolling speed of the device.

The bank protection cofferdam structure comprises a first pile row and a second pile row which are arranged in parallel, the first pile row and the second pile row are driven in soil, the upper end of the first pile row and the upper end of the second pile row are connected through an opposite-pulling mechanism, a first bamboo raft sheet layer and an anti-seepage geomembrane are arranged on the inner side of the first pile row, and a second bamboo raft sheet layer and an anti-seepage geomembrane are arranged on the inner side of the second pile row. A second bamboo raft piece layer and geotechnical cloth are arranged on the inner side of the second pile row, backfill soil is arranged between the first pile row and the second pile row, and bagged soil is evenly laid on the top of the backfill soil. The anti-seepage performance and the stability of the revetment cofferdam structure can be improved.

The utility model relates to a hemming system for seaming a geomembrane on a building protective net, which comprises a first tensioning device, a sewing device and a monitoring tensioning device for the building protective net to enter in sequence, and an edge folding device for folding the edge of the building protective net is further arranged between the first tensioning device and the sewing device. A folding guide device for folding the geomembrane and then feeding the geomembrane into the folded edge of the building protective net is further arranged between the edge folding device and the sewing device, and the monitoring tensioning device is electrically connected with the first tensioning device. When the folding device is used, a geomembrane is folded through the folding device and then fed into a folded edge, meanwhile, the tensioning degree of the building protective net at the sewing device is monitored in real time through the monitoring tensioning device, and when the building protective net is too tight, a signal is transmitted to the first tensioning device to drive the first tensioning device to loosen the building protective net; therefore, the tensioning effect of the building protective net is adjusted, and the needle head is prevented from being broken.

The invention provides a geomembrane on-line leakage detection system and detection method, and relates to the technical field of geomembrane detection, the system comprises a signal monitoring module used for arranging a sensing detection network under a geomembrane in an array, carrying out on-line monitoring, and determining a real-time leakage signal of the geomembrane; the sensing and positioning module is used for executing compressed sensing and positioning based on sparse reconstruction according to a plurality of leakage points corresponding to the plurality of leakage signals, and identifying a source sensing matrix; and the leakage early warning module is used for carrying out leakage point early warning based on the source sensing matrix and carrying out leaked area early warning based on the plurality of leakage signals. The technical problems that in the prior art, geomembrane leakage is difficult to accurately recognize and position, response is not timely, and the anti-seepage safety and the management efficiency are reduced are solved. The technical effects of accurately positioning and early warning the leakage points in real time, effectively improving the sensitivity and response speed of geomembrane leakage detection, and improving the anti-seepage safety and management efficiency are achieved.

The utility model relates to the technical field of geomembrane laying assistance, and provides a geomembrane flattening structure which comprises a pair of supports and a pair of moving wheels, the moving wheels are arranged at the lower ends of the supports, shaft seats are rotatably connected in the supports, a bulldozing assembly is arranged on the supports, a locking assembly is arranged on one side of each support, and the bulldozing assembly comprises a fixing column. The fixed column is arranged on the side surface of the support, the fixed column is rotationally sleeved with a swing frame, an extension rod is movably sleeved with the swing frame, and a long hole is formed in the surface of the swing frame. By means of the technical scheme, the problems that in the prior art, when a geomembrane is flattened, a traditional geomembrane flattening mode is usually adopted, a geomembrane roll is rotated and flattened by manually pulling a roller body, the defects still exist in the operation process, the needed labor intensity is large, the working efficiency is low, wrinkles are likely to occur in the flattening process, and the working efficiency is high are solved. The flattening device is not attached to the laid ground, and the flattening effect is poor.

The invention discloses a polyethylene composite geomembrane and a processing technology thereof in the field of geosynthetic materials. The polyethylene composite geomembrane is prepared from the following raw materials: high-density polyethylene, polyethylene grafted maleic anhydride, a nano montmorillonite / low-density polyethylene composite modifier, an antioxidant, a light stabilizer and a lubricant calcium stearate. Wherein the polyethylene grafted maleic anhydride is prepared by drying high-density polyethylene, mixing the dried high-density polyethylene with maleic anhydride, an initiator and an antioxidant, and performing melt extrusion through a double-screw extruder, so that the surface polarity is improved; the nano-montmorillonite / low-density polyethylene composite modifier is prepared by ultrasonically dispersing Na-montmorillonite, adding hexadecyl trimethyl ammonium bromide, stirring, centrifugally drying to obtain organic modified montmorillonite, mixing the organic modified montmorillonite with low-density polyethylene, performing intercalation reaction, and performing twin-screw extrusion and blending, so that the barrier property is enhanced. The processing technology comprises the steps of raw material mixing, twin-screw extrusion granulation and calendaring molding, and finally the polyethylene composite geomembrane with remarkably improved interface cohesiveness, weather resistance and barrier property is prepared.

The invention discloses a refuse landfill geomembrane leakage detection method and system, and relates to the technical field of leakage detection.The method comprises the steps that a plurality of electrodes are arranged on the basis of the upper portion and the lower portion of a refuse landfill geomembrane, and a membrane upper electrode array and a membrane lower electrode array are constructed; constructing a detection electric field to obtain multiple groups of induction signal data; setting a reference signal, and identifying an abnormal sensing signal according to an analysis result; and mapping the abnormal sensing signal to the under-membrane electrode array according to abnormal data characteristics for positioning, determining electrode position information, and obtaining a leakage detection result. The technical problems that in the prior art, the positioning precision of the leakage point of the geomembrane of the refuse landfill is low, the leakage scale is difficult to evaluate, and the anti-seepage performance is not monitored in time are solved, and the technical effects that accurate positioning and scale evaluation of the leakage point of the geomembrane of the refuse landfill are achieved, and effective monitoring of the anti-seepage performance of the geomembrane is guaranteed are achieved.

The invention discloses a high-puncture-resistance polyethylene geomembrane as well as a production device and a production process thereof, and belongs to the technical field of geomembranes. The high-puncture-resistance polyethylene geomembrane comprises an upper-layer membrane, a first middle-layer membrane, an inner-layer membrane, a second middle-layer membrane and a lower-layer membrane from top to bottom, each of the upper-layer film and the lower-layer film comprises the following components in parts by weight: 90-100 parts of modified linear low-density polyethylene resin and 2-10 parts of double-resistance black master batch; each of the first middle-layer film and the second middle-layer film comprises 40-60 parts of medium-density polyethylene resin, 35-55 parts of metallocene high-density polyethylene resin and 2-10 parts of double-resistance black master batch; and the inner-layer film comprises 60-80 parts of medium-density polyethylene resin, 15-35 parts of linear low-density polyethylene resin and 2-10 parts of double-resistance black master batch. The polyethylene geomembrane is of a symmetrical five-layer membrane structure with the inner layer membrane as the center, the components of all the layers and the proportional relation between the components are specifically limited, the puncture resistance and the environmental stress cracking resistance of the polyethylene geomembrane are synchronously improved, and the requirements of severe environment anti-seepage engineering are met.

The geomembrane unfolding device comprises a bottom frame, a first supporting column is arranged above the rear end of the bottom frame, the top of the first supporting column is connected with a U-shaped supporting block, and a rolling shaft is movably arranged in an inner cavity of the U-shaped supporting block; the feeding rollers and the rubber sleeve are used in cooperation, the geomembrane is clamped between the two feeding rollers, when the geomembrane is cut off, the cut-off position of the geomembrane cannot be thrown away, the use safety is high, due to the arrangement of the rubber sleeve, the rotation damping of the rolling shaft is increased, and when the first motor stops working, the rolling shaft cannot rotate, so that the service life of the geomembrane is prolonged, and the service life of the geomembrane is prolonged. And the rotation amplitude of the rolling shaft influenced by inertia can be reduced, so that the situation that the geomembrane is scattered after the equipment is stopped is avoided, and the overall practicability is improved.

The utility model relates to a high-pressure jet grouting cutoff wall clay core wall earth rock cofferdam construction structure which comprises the following steps: S1, surveying and lofting by a surveying ship, and determining a block stone throwing and filling area; s2, rubble embankment riprap filling and dynamic elevation re-checking are carried out; s3, filling construction of a clay core wall in a central area; s4, construction of the high-pressure jet grouting expansion diaphragm wall; and S5, anti-seepage construction of the composite geomembrane of the upper slope section is conducted. According to the construction method of the clay core wall earth rock cofferdam of the high-pressure jet grouting cutoff wall, the construction speed is high, the anti-seepage effect is good, and the construction technical defects that in the construction process of an existing deepwater earth rock cofferdam, the riprap precision is low, the high-pressure jet grouting cutoff wall leaks slurry, the anti-seepage effect of an upstream slope is poor and the like are overcome; the construction method has the construction advantages of high stability, high efficiency, high benefits and the like during implementation, and the technical benefits are remarkable.

The geomembrane welding machine with the folding handle comprises a geomembrane welding machine body and a handle body, a containing mechanism is arranged at the top of the geomembrane welding machine body, and the containing mechanism comprises a containing groove, a U-shaped plate, a reset spring, an insertion rod, a through groove, a pull rod and a through hole. The handle body is movably connected to the rear side of an inner cavity of the storage groove through a bearing, and a pull rod is pulled outwards to drive a fixing plate to extrude a first telescopic rod and a reset spring, so that the first telescopic rod is compressed, the reset spring is deformed, and an insertion rod is driven to move outwards; and when the pull rod is loosened, the reset spring deforms again due to the action of losing force, the insertion rod is driven to be inserted into the insertion hole, the handle body is stored and fixed, when the handle body does not need to be used, folding and storage are convenient, and the occupied space is reduced.

The invention provides a reservoir basin geomembrane and concrete toe board composite anti-seepage connecting structure and a safety monitoring method. The reservoir basin geomembrane and concrete toe board composite anti-seepage connecting structure comprises a concrete toe board, a GM-GCL composite anti-seepage connecting structure, a reservoir basin geomembrane and a special rolling area. Osmometers are arranged between the corrugated geomembrane and the GCL and below the GCL, and a safety monitoring meter is arranged at the position where the geomembrane is horizontally laid. The corrugated GM-GCL composite anti-seepage connecting structure is formed by the geomembrane and the GCL geosynthetic clay liner which are arranged in a corrugated mode, self-adaptive deformation is generated under the action of overlying water pressure by means of the telescopic characteristic of the corrugated GM-GCL composite anti-seepage connecting structure, and therefore the differential settlement difference between a concrete toe board and a reservoir basin foundation is coordinated, and the anti-seepage effect is achieved. Meanwhile, a special rolling area is arranged to improve the supporting capacity of the silty-fine sand filler and the transition layer below the composite anti-seepage connection structure, the problem that local connection of the anti-seepage geomembrane is damaged due to deformation discordance is effectively solved, and a leakage and deformation monitoring method of the corrugated GM-GCL composite anti-seepage connection structure is established; technical support is provided for concrete toe board and geomembrane anti-seepage connection design and a safety monitoring method in pumped storage power station reservoir engineering.

The invention discloses an underwater sealing structural adhesive as well as a preparation method and application thereof. The underwater sealing structural adhesive is prepared from 20 to 30 parts of organic silicon modified epoxy resin, 10 to 20 parts of silane-terminated polyester, 10 to 15 parts of polyether polyol, 50.5 to 60.5 parts of filler, 15 to 25 parts of talcum powder, 1 part of fumed silica and 4.5 to 5.5 parts of titanium dioxide. The preparation method comprises the following steps: weighing the organic silicon modified epoxy resin, the silane-terminated polyester, the polyether polyol, the filler, the talcum powder, the fumed silica and the titanium dioxide in proportion, sequentially adding into a stirrer, stirring for 1-3 hours, uniformly stirring to obtain the underwater sealing structural adhesive, and packaging the discharged underwater sealing structural adhesive into a rubber tube. The application is to bond a joint in a water channel without cutting off water. According to the technical scheme provided by the invention, the technical problem that the bonding effect is poor when new and old geomembranes or concrete structures or the geomembranes and the concrete structures are bonded underwater is solved.

The invention relates to a marsh area roadbed treatment method, which comprises the following steps of: longitudinally excavating two parallel drainage open ditches on the top surface of a roadbed at intervals, excavating a foundation trench which is 0.5 m below an underground water level line in an area between the open ditches, paving a broken stone hardcore and a two-way stretching plastic geogrid in an ultra-wide manner, filling lime improved soil with quicklime fineness of less than or equal to 5mm and digestion rate of more than or equal to 90% in a layered manner, and carrying out subgrade treatment. The compactness is controlled to be larger than or equal to 93% through a vibratory roller, then a composite impermeable layer composed of a cement stabilizing layer, an HDPE geomembrane and a medium-coarse sand protection layer is laid, and a permeable pipe is embedded in the longitudinal direction of the roadbed and communicated with the open drain. Through the synergistic effect of the three-dimensional drainage system and the multi-layer structure, the roadbed drainage efficiency is effectively improved, the foundation stability and seepage-proofing performance are enhanced, and the method is mainly suitable for foundation treatment of road engineering in the marsh area.

The whole reservoir anti-seepage reservoir of the pumped storage power station comprises a seepage control structure, a drainage collection system and a seepage monitoring system, the seepage control structure comprises a reservoir bottom seepage control structure and a reservoir bank seepage control structure, and the reservoir bottom seepage control structure comprises a geomembrane, a broken stone hardcore, a reservoir bottom transition layer, a geotechnical mat and geotechnical cloth; the reservoir bank seepage control structure comprises a geomembrane, a reservoir bank cushion layer, high-strength woven geotechnical cloth and a wave wall. On the basis of the characteristics of deformation and the like of different areas of the reservoir basin, adaptive seepage control types are designed and combined to form a complete full-reservoir-basin seepage control structure, seepage pressure value information of monitoring points is collected in real time through the seepage monitoring system, and the seepage pressure value information of the monitoring points is acquired in real time. And a leakage point position judgment method is provided to determine a local leakage point area.

The utility model relates to a subgrade structure with an expansive soil filling core. The subgrade structure sequentially comprises a foundation, a broken stone hardcore, a non-woven geotextile inverted filter layer and the expansive soil filling core. The slope surfaces on the two sides of the expansive soil filling core are each sequentially provided with an edge sealing clay layer, a side slope anti-seepage geomembrane and a concrete slope protection building block from inside to outside; an asphalt concrete waterproof layer and a capping clay layer are sequentially arranged at the top of the expansive soil filling core from top to bottom; the top of the expansive soil filling core is provided with a first layer of anti-expansion geocell; a second layer of anti-expansion geocell is arranged below the first layer of anti-expansion geocell in parallel; a permeable hose penetrating into the expansive soil filling core is arranged on the concrete slope protection building block. According to the utility model, the influence on roadbed stability and driving safety caused by embankment slope instability and roadbed surface arching due to water absorption expansion of the expansive soil filling core of the embankment in the plum rain climate region can be avoided, and the long-term stability of the expansive soil filling core embankment in the plum rain climate region is improved.

The utility model belongs to the technical field of hydraulic engineering, and particularly relates to an anti-seepage earth rock cofferdam structure which comprises a horizontally-arranged concrete base plate. The concrete core wall is vertically arranged, and the bottom end of the concrete core wall vertically and downwards penetrates through the concrete base plate and extends into the ground; clay core protection walls, earth-rock mixed layers, isolation layers, concrete reinforcing layers, composite geomembranes and stone protection slopes are sequentially and symmetrically arranged on the two sides of the concrete core wall from inside to outside. The earth rock cofferdam with a good anti-seepage effect is formed by arranging a plurality of components such as the concrete base plate, the concrete core wall, the clay core protection wall, the earth rock mixing layer, the isolation layer, the concrete reinforcing layer, the composite geomembrane and the stone protection slope and designing the specific shape and structure of each component, and the service life of the earth rock cofferdam can be prolonged; good application prospects are realized.

A synthetic turf cover system for covering various types of sloping ground includes synthetic grass blades tufted into and through a composite backing, with the composite backing including a non-woven synthetic textile lower layer and a woven textile upper layer positioned above and adjacent the non-woven synthetic textile lower layer. The non-woven synthetic textile lower layer provides good interface shear strength with the ground or a ground-covering membrane, while the woven textile upper lawyer provides good strength. The synthetic turf cover system provides good cushioning to help protect the geomembrane against damage from vehicles driving on the synthetic turf cover system.

The invention discloses a method for fixing an anti-seepage transition section of an irregular rock slope of a mine pit landfill, which comprises the following steps of: wet-spraying anti-seepage gelling composite spraying filler on the irregular rock slope (1-2), and forming an anti-seepage gelling composite spraying filler layer (2) on the surface of the anti-seepage transition section; an anti-seepage geomembrane (3) is laid on a self-regular rock slope surface (1-1), then a rubber pad (7) and a thin steel plate (6) are laid on the anti-seepage geomembrane (3) from inside to outside, a hollow grouting anchor rod (4) is drilled from drill holes of the thin steel plate (6) and the rubber pad (7) in a self-drilling mode, and an anti-seepage plugging agent (8) is adopted for trimming. The method is applied to reinforcement of the irregular rock slope anti-seepage transition section of the mine pit landfill, the problem that the irregular rock slope anti-seepage transition section is prone to damage in the fixing process is solved, potential hazards are eliminated, the safety and reliability of an anti-seepage system are improved, good economic benefits are achieved, and safety and environmental protection benefits are remarkable.

The invention relates to the technical field of water conservancy project exploration, in particular to a device and method for detecting the integrity of a geomembrane anti-seepage system in the plain reservoir operation period. The detection device comprises a pontoon; the underwater suspension cable is dragged at the tail part of the pontoon; the underwater cable dragging unit is connected to the front end of the underwater suspension cable; the tail end suspension device is connected to the tail end of the underwater suspension cable; the underwater cable dragging unit is used for providing horizontal pulling force in the measurement process, the tail end suspension device is used for controlling the suspension depth of the tail end of the underwater suspension cable, and the underwater cable dragging unit and the tail end suspension device keep the same suspension depth in the measurement process. According to the method, the problems that the front end of the cable is easily lifted by a pontoon, the posture is unstable and the cable is easily interfered by stormy waves in the prior art are solved, and an accurate division evaluation and result interpretation method is provided for judging the integrity of a geomembrane anti-seepage system in the operation period of a plain reservoir.

The utility model provides a mine ecological restoration filling slope platform drainage device, and relates to the technical field of mine ecological restoration slope drainage. The structure comprises a filling slope, a soil drainage ditch, a clay layer, a drainage pipe, a geomembrane and a soil water retaining stem, a soil drainage ditch is arranged on the inner side of the slope platform; clay layers are arranged on the surfaces of the soil drainage ditches, and drainage pipes are arranged on the surfaces of the clay layers; a geomembrane is arranged on the surface of the drainage pipe, the two sides of the geomembrane extend to the platform and the slope toe, and a soil water retaining stem is arranged on the surface of the part, extending to the platform, of the geomembrane. The structure is convenient and rapid to construct, simple in structure and capable of adapting to uneven settlement deformation of the mine filling slope, water on the surface of the filling slope can be collected into the slope toe drainage ditch to be discharged in time, instability caused by surface water scouring and infiltration of the slope is prevented, vegetation damage caused by surface water is reduced, and the mine ecological restoration effect is guaranteed.

The invention relates to the technical field of PVC geomembranes, in particular to a PVC geomembrane which comprises a surface layer, a reinforcing layer and a bottom layer, the lower surface of the surface layer is fixedly connected to the upper surface of the reinforcing layer, the lower surface of the reinforcing layer is fixedly connected to the upper surface of the bottom layer, and the reinforcing layer is arranged between the surface layer and the bottom layer. The PVC resin (SG-5), the cross-linking agent master batch, the carbon black (N330), the plasticizer (DOP), the stabilizer (calcium zinc) and the lubricant (stearic acid) are used for manufacturing the surface layer, the glass fiber cloth, the PVC resin (SG-5), the plasticizer (DOP / ESO), the stabilizer (calcium zinc) and the coupling agent (silane coupling agent KH-550) are used for manufacturing the reinforcing layer, and the glass fiber cloth, the PVC resin (SG-5), the plasticizer (DOP / ESO), the stabilizer (calcium zinc) and the coupling agent (silane coupling agent KH-550) are used for manufacturing the reinforcing layer. And the bottom layer is prepared from PVC resin (SG-5), a plasticizer (DOP / ESO), a filler (calcium carbonate), a stabilizer (calcium zinc), a lubricant (stearic acid), a foaming agent (AC foaming agent) and carbon black (N330), so that the characteristics of tightness, ultraviolet resistance, conductivity, tensile strength, puncture resistance, dimensional stability and the like of the PVC geomembrane are enhanced.

The invention discloses a cloth bag pile performance checking method. The method comprises the following steps that S1, tensile strength, tearing strength, puncture resistance and permeability tests are conducted on a geomembrane wrapping a cloth bag pile; s2, the concrete pouring elevation is detected in the cloth bag pile concrete pouring pile forming process based on the measuring rope; s3, the volume, the change elevation and the sectional area data of the cast-in-place concrete of the cloth bag pile are obtained through segmented multiple times of measurement, and the shape of the cloth bag pile is calculated according to the change trend of the data; and S4, estimating the bulged thickness of the drum-shaped body and the actual maximum tensile stress according to the concrete over-filling volume, comparing the maximum tensile stress with the standard tensile strength, and checking the strength of the geomembrane bag. According to the cloth bag pile performance checking method, before cloth bag pile construction is carried out, the related performance of the cloth bag pile is checked, the complexity of the cloth bag pile structure can be well dealt with, and the cloth bag pile performance checking method is better suitable for pile foundation construction of karst areas with the complex geographical environment.

The invention belongs to the technical field of geomembrane roughening spraying, and particularly relates to a spraying device based on geomembrane roughening spraying, which comprises a base, a heater is fixed on one side above the base, an ejector is fixed on the other side above the base, the heater and the ejector are connected through a pipeline, and a screw extrusion mechanism is arranged in the ejector. A motor is fixed at one end of the ejector, a spray head is fixed at the other end of the ejector, and the screw extrusion mechanism is fixedly connected with the output end of the motor; a feeding pipe is connected to the upper portion of the ejector, a feeding cavity is connected to the upper portion of the feeding pipe, a cover plate is connected to the upper portion of the feeding cavity, a cavity is fixed to the inner wall of the feeding cavity, an electric motor is fixed to the inner wall of the cavity, and sector teeth are fixedly connected to the output end of the electric motor. The device solves the problems that in the current geomembrane rough spraying process, the circulation effect on plastic particles is poor before plastic filaments are sprayed, and blockage or poor roundness of the particles is often caused due to the fact that the amount of fed materials is large or small.

The invention provides a special geomembrane for a pumped storage power station and a preparation method of the special geomembrane, and relates to the technical field of geomembrane materials. The special geomembrane for the pumped storage power station comprises an outer layer, a middle layer and an inner layer which are sequentially connected, the outer layer is prepared from the following raw materials: 55 to 65 percent of MDPE, 33 to 40 percent of HDPE, 1 to 5 percent of antioxidant master batch and 1 to 7 percent of double-resistant color master batch; the middle layer is prepared from the following raw materials: 15 to 25 percent of HDPE (High-Density Polyethylene), 35 to 45 percent of LLDPE (Linear Low Density Polyethylene), 25 to 35 percent of POE (Polyolefin Elastomer), 1 to 5 percent of antioxidant master batch and 3 to 7 percent of double-resistant color master batch; the inner layer is prepared from the following raw materials: 35 to 45 percent of MDPE, 40 to 50 percent of LLDPE, 8 to 12 percent of POE, 1 to 5 percent of antioxidant master batch and 3 to 7 percent of double-resistant color master batch. The strength, the fatigue resistance and the aging resistance are balanced on the whole, so that the long-term operation requirement of the pumped storage power station is met.

The application provides a semi-excavation and semi-filling full-reservoir-pot anti-seepage drainage type, which comprises asphalt concrete panels arranged along the periphery of the reservoir pot and a geomembrane laid on the reservoir bottom, the asphalt concrete panel on one side of the reservoir bank is overlapped with the geomembrane through the arrangement of a reservoir bank concrete gallery, the asphalt concrete panel on the panel rockfill dam is overlapped with the geomembrane through the arrangement of a concrete connecting plate, the connection and fixation of the asphalt concrete panel and the geomembrane are realized through the arrangement of the concrete connecting plate and the reservoir bank concrete gallery, the problems that the concrete panel of a high dam is easily squeezed and damaged and the asphalt concrete panel on the high-filling slag body of the reservoir bottom is difficult to adapt to uneven deformation are solved, a new anti-seepage solution is provided for projects with complex topographic and geological conditions, high dam, deep filling of the reservoir bottom and poor filling materials, a partition monitoring system is formed through the arrangement of the reservoir bank concrete gallery, the reservoir bottom concrete gallery and the front pool concrete gallery, the defect position of the reservoir pot seepage can be quickly and effectively identified, and the operation safety of the project is ensured.

The utility model discloses a kind of TPO geomembrane seepage prevention detection test devices, specifically related to seepage prevention test technical field, including test shell, the outer wall of test shell is equipped with positioning counterweight sealing assembly, positioning counterweight sealing assembly includes: sealing strip, fixedly connected in the lower surface of counterweight frame, sealing strip is used to contact TPO geomembrane surface and adhere to seal;Multiple guide columns, all fixedly connected in the upper surface of counterweight frame, the top of each guide column is fixedly connected with guide end.The utility model uses positioning counterweight sealing assembly, counterweight cover is guided and inserted on the outer wall of guide column along guide end, multiple counterweight cover realize large-area counterweight extrusion to the upper surface of counterweight frame, so that sealing strip and TPO geomembrane surface realize quick contact seal, quickly realize multi-point synchronous counterweight sealing, sealing seepage prevention detection test processing is more efficient.