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1409 results about "Geotextile" patented technology

Geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain. Typically made from polypropylene or polyester, geotextile fabrics come in three basic forms: woven (resembling mail bag sacking), needle punched (resembling felt), or heat bonded (resembling ironed felt).

Landscape type multi-stage stepwise artificial wetland protection slope forming method

The invention relates to a slope protection forming method of a landscape-type multi-level stepped constructed wetland, which has the effect of intercepting and purifying pollutants entering river channels in the form of surface sources. Sand-free concrete piles and slabs are inserted to form pile-slab components, and a slope protection system from high to low is formed on the river bank slope from the bank slope to the river bed. Planting areas are set on the side of the pile slabs, and there are fillers inside. Geotextiles are installed on the bankside side of the slab, so that when the non-point source pollutants flow from the river bank to the river, the plants planted in the planting area absorb the eutrophication in the polluted water, and the biofilm is formed on the surface of the filler to absorb and degrade the pollutants. After this The sewage treated at the first stage continues to infiltrate or overflow, enters the second row, and goes down step by step. Finally, the sewage is purified to a greater extent and flows into the river. It solves the defects of natural, hard and ecological slope protection. The structure is simple, easy for industrial production, the construction amount is small, the land is saved, and the landscape is beautified.
Owner:HOHAI UNIV

Restoration method for damaged ecosystem in steep-slope area in water-level-fluctuating zone of reservoir

The invention relates to a restoration method for a damaged ecosystem in a steep-slope area in a water-level-fluctuating zone of a reservoir. The method comprises the following steps:when the impounded water level is at the lowest point, cleaning the upstream slope in the water-level-fluctuating zone, and manually tamping; digging planting holes at the top of the slope, and planting Chinese red pines and the like to form a multifunctional protective forest belt; digging planting grooves and planting holes within the range of the water-level-fluctuating zone, laying jute geotextile, planting vetiver within the range with the water-level-fluctuating depth of 2m to form a hedgerow; and mixedly planting vetiver and wire grass within the range with the water-level-fluctuating depth of 2-10m to form a combined vegetation slope restoration belt. The protective forest belt, the hedgerow and the combined vegetation slope restoration belt form a three-dimensional restoration space together, thereby ensuring that plants can take roots and restore in the steep-slope area in the water-level-fluctuating zone. By restoring the vegetation in large area, the invention effectively reduces the overland flow and the soil erosion, and improves the fertility and the properties of the soil, thereby restoring the damaged ecosystem. The invention has the advantages of convenient construction and less investment, can not be easily damaged by water, and is applicable to the water-level-fluctuating zone of a reservoir with large water-level-fluctuating range and precipitous topography.
Owner:HUAZHONG AGRI UNIV

Construction method of dewatering well under foundation slab in foundation pit

ActiveCN101705691AGuaranteed validityPrecipitation costs are smallExcavationsBasementCrushed stone
The invention discloses a construction method of a dewatering well under a foundation slab in a foundation pit, comprising the following steps of: arranging the dewatering well in the foundation pit, wherein the dewatering well is not damaged in the process of excavating a foundation pit earthwork, and the effectiveness of the dewatering well is ensured; after the foundation pit earthwork is excavated to a basement, excavating interlaced ditches along the center line of the dewatering well, and paving water-filtering type geotextile in the ditches; then paving drain pipes of the dewatering well and cables in the ditches and connecting to the outside of the pit, checking the depth of the dewatering well, an extraction pump and a pipeline thereof to ensure the integrality and the reliability; then paving granular crushed stones or cobbles in the ditches, covering asphalt felt thereon to form a blind ditch; leading the blind ditch to a water collection pit at the edge of the foundation pit and arranging a surface drain on the periphery of the foundation pit; paving a subcrust and a waterproof layer under the constructed foundation slab, gradually reducing the usage quantity and the dewatering speed of dewatering wells in the foundation pit in the construction process of underground structures and upper structures thereof, and assisting in draining by adopting the water collection pit at the periphery of the foundation pit until the dewatering operation in the foundation pit can be stopped. The invention has convenient construction, safety and reliability and low cost for dewatering in the foundation pit.
Owner:南通建工集团股份有限公司

Remoulding soft clay sample preparation device and method based on vacuum combined electron-osmosis effect

The invention discloses a remoulding soft clay sample preparation device and a remoulding soft clay sample preparation method based on a vacuum combined electron-osmosis effect. Nonwoven geotextile, a gravel layer, a sand mat layer and an electron-osmosis cathode are sequentially paved on an osmosis drainage base; the upper and lower ends of a latex film are respectively turned outward and sleeved on a sample loading solidification cylinder and are fixed with the osmosis drainage base by a bolt through a flange; a water vapor separation cylinder is provided with an electric contact vacuum member and is connected with the osmosis drainage base and a vacuum pump respectively through an air pipe; slurry is poured into the designated height of the sample loading solidification cylinder, and an electro-osmosis anode is put in; and the electro-osmosis anode and the electro-osmosis cathode are respectively connected with a programmable direct-current power supply by wires. Under the combined effect of vacuum negative pressure and electro-osmosis, the drainage solidification speed of a soil body is increased, and the solidification stress level in a soil body sample preparation process can be adjusted. According to the device and the method disclosed by the invention, the size of a sample tank is reduced, and meanwhile, the number of sample preparation each time is increased by preparing multiple groups of soil samples; the device has a simple structure and is convenient for operation and sample taking; and the sample preparation period is short, and secondary cutting, disturbance and waste of soil samples are effectively avoided.
Owner:HOHAI UNIV

Protection method for high and steep side slope ecological restoration technology

InactiveCN105297745APermanent natural succession functionNo secondary damageExcavationsHorticultureVegetationEcological environment
The invention relates to a protection method suitable for the high and steep side slope ecological restoration technology. The protection method is characterized by comprising the following steps that, 1, the slope surface is tidied, and a side slope is measured; 2, an anchor rod is driven into a high and steep side slope and grouting is conducted for support; 3, vertical and horizontal support lines are installed, and a grille net is laid and hung on the slope surface; 4, a steel wire rope net is laid and hung on the grille net; 5, an angle steel bracket is installed, in addition, the angle steel is fixedly welded with the anchor rod; 6, a gabion mesh and a nutrient geotextile are laid in a layered mode; 7, primary level vegetation concrete is seeding-sprayed; 8, a nutrient substrate is seeding-sprayed on the primary level vegetation concrete; 9, top-level vegetation concrete is seeding-sprayed on the nutrient substrate; 10, an independent planting groove is formed in the top-level vegetation concrete to plant seedlings; and 11, maintenance and management are conducted. According to the protection method for the high and steep side slope ecological restoration technology, the ecological restoration problem of the side slope with the slope being greater than 60 degrees can be solved effectively, the ecological environment is restored, and a new method is provided for solving the problems of high and steep side slope ecological restoration and side slope stability.
Owner:青岛润国生态科技发展有限公司 +1

Hot-water draining consolidation processing device and hot-water draining consolidating processing method for soft soil foundation

The invention discloses a hot-water draining consolidation processing device and a hot-water draining consolidating processing method for soft soil foundation. The device provided by the invention comprises a pressure system, a horizontal water draining system and a vertical water draining system; the vertical water draining system comprises a plurality of heat conduction plastic water draining plates; each heat conduction plastic water draining plate comprises a plastic core plate and a filter membrane; heat conduction pipes are arranged at the periphery of the plastic core plate; all the heat conduction pipes are connected to form a circulating loop through a pipeline; and a water inlet and a water outlet of the circulating loop are respectively connected with a water circulation heater. The method provided by the invention mainly comprises the steps of: leveling up a site, laying a horizontal water draining sand cushion, excavating pipe slots to arrange a vacuum water draining filter pipe, connecting the vacuum water draining filter pipe with a vacuum pump, inserting the heat conduction plastic water draining plates, laying a seal membrane and a piece of geotextile, starting the water circulation heater and the vacuum pump, vacuumizing and performing preloading. The device and the method provided by the invention have the advantages that the construction period is effectively shortened, sedimentation after the construction is reduced, the process is simple, and the operation is convenient.
Owner:宁波市轨道交通工程建设指挥部

Improved urban domestic garbage landfilling structure and landfilling treatment method

The invention relates to an improved urban domestic garbage landfilling structure and a landfilling treatment method using the same. The improved urban domestic garbage landfilling structure comprises a clay liner, a polymer film, a geotextile and a percolate guiding and discharging layer, wherein the clay liner is laid on foundation soil; the polymer film is laid on the clay liner; the geotextile is laid on the polymer film; and the percolate guiding and discharging layer is laid on the geotextile, and a percolate guiding and discharging pipe is buried in the percolate guiding and discharging layer. The improved urban domestic garbage landfilling structure is characterized in that the tail end of the percolate guiding and discharging pipe is communicated with atmosphere, the percolate guiding and discharging pipe is also respectively connected with an opened horizontal air guiding pipe and an opened vertical air guiding pipe, and the horizontal air guiding pipe and the vertical air guiding pipe as well as a gabion for protecting the horizontal air guiding pipe and the vertical air guiding pipe all extend out of the garbage landfilling structure and then are communicated with the atmosphere. The invention is especially useful for the rapid stabilization of urban domestic garbage and the function of emission reduction of greenhouse gases CH4.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Granule grouting pile of ripple plastic sleeve with hole for strengthening soft soil foundation and strengthening method

The invention discloses a grouting pile of a plastic sleeve for strengthening a soft soil foundation and a pile-forming strengthening construction method thereof. The pile consists of a pile cap, a thread sleeve, an earthwork cloth, a joint, a pile body and a pile tip; the top of the sleeve is connected with the pile cap and the bottom of the sleeve is connected with the pile tip, the side wall of the sleeve is provided with an opening hole, the outside of the sleeve is packed by the earthwork cloth, each section of the sleeve is connected by the joint, and the sleeve is filled with granules and grouted with slurry inside so as to form the pile body and a pile periphery as a slurry spreading zone. The pile-forming strengthening method comprises: connecting the sleeve to the depth of the pile length by the joint and then to the pile tip, placing the sleeve and the pile tip into an immersed tube together, beating the sleeve into a foundation by a beating machine, leaving the sleeve and the pile tip in the foundation, feeding the granules into the sleeve and grouting the sleeve to form a slurry scattered material column, spreading a slurry liquid on the pile periphery to form a spreading zone under the grouting pressure or expanding the earthwork cloth outwards to form a gourd pile body, pouring the pile cap on the pile top, and paving a reinforced material and a gravel cushion after the pile body and the pile cap are dried so as to form a composite foundation. The pile type can strengthen the contact action between the pile and the soil, can improve the bearing capacity of the pile body greatly, and is an ideal pile type for strengthening the soft soil foundation.
Owner:HOHAI UNIV

Heavy metal polluted sludge treatment method

The invention discloses a heavy metal polluted sludge treatment method which comprises the following steps: conveying heavy metal polluted bottom sludge of rivers, lakes and reservoirs by a slurry pump of a sanddredger ashore; adding heavy metal chelate stabilizer in a first pipeline blender of dredging pipelines; and then adding flocculant in a second pipeline blender; and finally filling sludge in geotextile bags for volume reduction and dehydration; and concreting for 7-50 days after the sludge filling, wherein the sludge treated by the method can be used for land reclamation, greening or landfilling according to different water contents and heavy metal contents. Compared with the prior art, by environmental-protection dredging, transmission by closed pipelines and heavy metal stabilization, the invention completely solves the secondary solution problem of heavy metals; and the invention combines the heavy metal stabilization and a geotextile bag dehydration technology without power consumption without the input of mechanical dehydration equipment, and is suitable for heavy metal polluted sludge treatment in occasions of large treatment area, short work period, small dehydration site, less once investment, low operation cost and the like.
Owner:TIANJIN ECOLOGY CITY ENVIRONMENTAL PROTECTION

Protection method for improving salt expansion or dissolution sink of salty soil

The invention relates to a protection method for improving the salt expansion or the dissolution sink of salty soil, which is characterized in that calcium carbide ash, fly ash, zeolite and salty soil are adopted, are mixed and stirred according to the volume ratio of 1:1:1:9 and are used for the filler improvement of a road embankment, broken stone and gravel are adopted as a buffer layer, bitumen, geomembranes and geotextiles are adopted as a partition layer, a geogrid reinforcement improved filler is adopted, a sack filled with greening grass seeds, shrub seeds and improved soil is adopted to press the toe of a slope, and a side slope adopts the protection of the companion planting of grass and shrub and the combination of a hanging net. The invention has the following advantages of: (1) adjusting measures to local conditions, making full use of the salty soil, saving resources, utilizing wastes, such as the fly ash and the like, and realizing the utilization of the wastes; (2) adopting a structural protection system formed by the improved salty soil and a geogrid together and solving the problems of stability and uniform settlement of a fill slope; and (3) combining the grass and the shrub, reaching the ecological requirement on one hand, solidifying a sloping surface on the other hand and preventing the water and soil loss and the salt expansion or the dissolution sink. The invention is suitable for the problem of engineering improvement of the salty soil in civil engineering and can be used for the engineering of the filling of a highway embankment, the protection of the side slope, the construction of a foundation, the improvement treatment of a foundation pit and the like.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI

Processing method of soaking, vacuum preloading and slurry injecting for sand piles of collapsible loess foundation

InactiveCN103233454AIncrease the compressive stress of collapsible deformationImprove the level ofSoil preservationVacuum pumpingVacuum extraction
The invention discloses a processing method of soaking, vacuum pre-pressing and slurry injecting for sand piles of a collapsible loess foundation, which comprises the following steps: 1, manufacturing pile pipes in a collapsible loess stratum in a pre-pressing region, embedding a slurry injection steel pipe in each pile pipe, pouring sand at circumferences of the slurry injection steel pipes to form the sand piles, and laying a sand mat at the upper ends of all the sand piles while laying a vacuum extraction pipe; 2, digging sealing ditches at the periphery of the pre-pressing region, sequentially laying a first layer of geotextile, a diaphragm seal and a second layer of geotextile above the sand mat, backfilling clay layers and a heaping load body, filling water in the collapsible loess foundation of the sand piles, performing vacuum-pumping after saturation of the foundation, and completing consolidation and deformation under action of vacuum preloading; and 3, digging out the heaping load body, filling slurry into the slurry injection steel pipes, and pulling out the slurry injection steel pipes to form the slurry injected sand piles. The method provided by the invention has a better effect for the processing of the collapsible loess foundation.
Owner:XIAN UNIV OF TECH +1

Fast consolidation method of blow-filled soft soil for land reclamation

The invention relates to a fast consolidation method of blow-filled soft soil for land reclamation, comprising the following process steps of: erecting a floating bridge; paving a plastic woven cloth; paving a main pipe and a branch pipe; inserting a plastic drainage plate; embedding a joint and a vacuum degree meter of a vacuum pump and a pore pressure meter monitoring device; paving a geotextile; paving a vacuum film; distributing the vacuum pump and trying to vacuumize; vacuumizing; monitoring construction; and carrying out vacuum water covering united pre-loading and unloading detection, wherein the step of erecting the floating bridge comprises: erecting the floating bridge on the blow-filled soft soil requiring the treatment and building a construction platform and a channel on mud. The invention has the advantages that construction members carry out operations of paving the plastic woven cloth, inserting the plastic drainage plate, laying pipes, paving the geotextile and the like on the floating bridge, thereby the technical problem that the follow-up treatment on the new blow-filled soft soil cannot be instantly carried out by using the traditional soft soil foundation treatment technology is solved, and 2-5 years for consolidating the new blow-filled soft soil naturally before retreatment are saved.
Owner:温州泰昌港湾工程有限公司

Large-span tunnel excavation method for upper soft and lower hard compound strata

The present invention relates to a large-span tunnel excavation method for upper soft and lower hard compound strata. The present invention aims at providing a large-span tunnel excavation method for upper soft and lower hard compound strata so as to ensure large-span tunnel construction safety for the upper soft and lower hard compound strata, accelerate the construction progress and shorten the construction period. The technical scheme is that a tunnel is divided into upper and lower steps for excavation by the method, and the steps are as follows: a, determining a boundary of the upper soft and lower hard strata of an excavation surface according to geological prospecting data; b, constructing the upper step by using the center diaphragm method; c, constructing the lower step by using the method of reserving core soil; d, lagging the lower step with 2-3m headings at two sides; e, arranging earthwork cloth and an EVA waterproof board on a surface of a lower step inverted arch preliminary bracing, and pouring an inverted arch second lining; and f, dismounting a center diaphragm temporary bracing of the upper step and a temporary inverted arch of the upper step with segments, and pouring a pavement lining close to a preliminary bracing of the upper step and preliminary bracings of the headings at the two sides of the lower step. The large-span tunnel excavation method is applied to the technical field of tunnel construction.
Owner:POWERCHINA HUADONG ENG COPORATION LTD

Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill

InactiveCN103262689AConducive to storageFull rinseSoil lifting machinesClimate change adaptationTerrainAlkali soil
The invention discloses a coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill. The coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill comprises water seepage ditches, foundation terrain dredger fill, straw curtains, geotechnical cloth, improved planting soil, local models and the like, wherein square seepage ditches of the water seepage ditches are longitudinally excavated in the lowest position of the foundation terrain dredger fill, particle-size ballast stones are filled into the square seepage ditches, the distance between the foundation terrain dredger fill and the ground is 1-1.5m, the gradient of the foundation terrain dredger fill is 15 degrees to 30 degrees, straw is distributed on the foundation terrain dredger fill, the geotechnical cloth is laid on the straw curtains, and then the improved planting soil is laid on the geotechnical cloth. Due to the fact that the coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill is combined with the terrace type shape, the coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill is beneficial to retaining rainwater, enables salinity to be effectively leached and reduced, is beneficial to fertilizer and soil conservation, and enables the survival rate of landscape plants to be more than 90%, the waste is effectively utilized, natural resources are protected, and afforesting cost is reduced by more than 50%.
Owner:TIANJIN TA LANDSCAPE PLANNING & DESIGN CO LTD

Reinforced ventilating heat-proof foundation

The invention discloses a strengthening ventilation heat-insulation roadbed, characterized in that compacting sand-gravel-soil cushion is set on the compacting native surface; transverse concrete air ducts through wall with automatic air door controlled by temperature are set on the sand-gravel-soil cushion in a certain distance; crushed stone layer is set between air ducts through wall and above them; earthwork cloth is put on the horizontal crushed stone layer; heat insulation material is set on the earthwork cloth; and compacting embankment fill is filled on the heat insulation material. In the invention air ducts through wall are set in the crushed stone layer. In winter, by using lower temperature in frozen earth area and bigger wind speed through permeable hole of air duct the effect of convective cooling of air in the crushed stone layer is strengthened and there is strong ventilation cooling effect in air duct through wall itself. Two are combined with each other and are used by each other to decrease the temperature of frozen soil under the roadbed. In summer, the heat insulation material, the crushed stone layer and air duct through wall with air door controlled by temperature can play a role of thermal screen effect so as to prevent heat energy entering into embankment. At last storing cooling energy to the utmost is achieved; the temperature of frozen soil is decreased, the melting of frozen soil is avoided and the stability of embankment of frozen soil is ensured.
Owner:COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE

Ectopic coupled repairing system and method for treating organic compound contaminated soil

ActiveCN102319727ASustainable useMeet the need for restorationContaminated soil reclamationPolyvinyl chlorideEngineering
The invention provides an ectopic coupled repairing system and method for treating organic compound contaminated soil. The system comprises a contaminated soil pile body, a nutrient solution and moisture distribution pipe network connected with the contaminated soil pile body, as well as an air exhaust and tail gas treatment pipe network connected with the contaminated soil pile body, wherein the contaminated soil pile body comprises a concrete base layer spreading on an open field, a first layer of geotextile which is spread on the concrete base layer, a first layer of a high-density polyvinyl chloride impermeable membrane which is spread on the first layer of geotextile, a second layer of geotextile which is spread on the first layer of the high-density polyvinyl chloride impermeable membrane, a gravel gas conductive layer which is spread on the second layer of geotextile, a third layer of geotextile which is spread on the gravel gas conductive layer, contaminated soil piled on the third layer of geotextile, as well as a second layer of the high-density polyvinyl chloride impermeable membrane covering on the contaminated soil. The repairing system can be used for repairing large-scale volatile organic matter and biodegradable organic matter compound contaminated soil with low cost, and is suitable for large-scale industrial application.
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION

Phosphorous-nitrogen-containing polyethylene glycol terephthalate flame retardant copolyester and application of flame retardant copolyester

The invention discloses a phosphorous-nitrogen-containing polyethylene glycol terephthalate flame retardant copolyester and an application of the flame retardant copolyester. Through introducing phosphorous and nitrogen flame retardant monomers into a flame retardant polyester polymer, in situ synergistic interaction inflaming retarding of phosphorous and nitrogen flame retardant elements is achieved; phosphorus-containing polyester dihydric alcohol is introduced to adjust the phosphorous content of the flame retardant copolyester, and the flexibility, the spinnability and the dyeability of a chain segment; tri(2-ethoxy) isocyanurate is introduced, and has positive significance on extender chain crosslinking, tackifying and anti-dripping of the copolyester; the phosphorous-nitrogen-containing polyethylene glycol terephthalate flame retardant copolyester and the product of the flame retardant copolyester can be widely applied to the fields such as curtain fabrics, soft wall wrapping cloth, electric power industrial fabrics, energy industrial fabrics, water conservancy geotextile, carpets, hometextile and medical partition curtains; and the related flame retardant products pass through various flame retardant standards (for example, BS5852-2006 flame retardant standard, BS5867-2-2008 flame retardant standard, or B1 grade of GB8624-2012 flame retardant standard and the first grade of GB20286-2006 flame retardant standard).
Owner:HANGZHOU XIANGJUN TEXTILE FLAME RETARDANT TECH
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