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50results about How to "Prevent piping" patented technology
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Freezing consolidation and soil-accumulating watering shield arrival method
ActiveCN102352753ASettle settlementSolve the problem of \"lower head\"Underground chambersTunnel liningHydrologyRetaining wall
The invention discloses a tunnel freezing consolidation and soil-accumulating watering shield arrival method, which comprises the following steps of: (1) consolidating a stratum of a tunnel arrival section by using a jet pile or a mixing pile; (2) stopping water for a stratum close to an opening of a receiving well by using a freezing method; (3) removing a retaining wall of a tunnel portal, and filling in the receiving well to obtain a mound; (4) injecting water into the receiving well to reach the designed height; and (5) making a shield machine tunnel to enter the receiving well structure to finish the whole receiving work. By the method, when tunnel portal concrete is removed, the integral stability of soil mass can be ensured, seepage damage caused by a fine sand stratum is prevented, muddy water pressure during tunneling of the shield machine can be balanced, and is prevented from breaking through the peripheral soil mass of the tunnel portal, and the shield arrival is carried out safely and smoothly.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Supporting and construction method of steel sheet pile under soft foundation of high flow plastic deep layer
InactiveCN103343538ASimplify the construction processEffective water stopExcavationsBulkheads/pilesPurlinEngineering
The invention relates to supporting and construction method of a steel sheet pile under soft foundation of a high flow plastic deep layer, and belongs to the technical field of building construction.The supporting and construction method of the steel sheet pile under the soft foundation of the high flow plastic deep layer comprises the steps of construction preparation, construction of guiding purlins, injection of a steel sheet pile, excavation and water drainage, foundation trench interior construction and removing of the steel sheet pile. The supporting and construction method of the steelsheet pile under the soft foundation of the high flow plastic deep layer is simple and easy to implement during the construction process, is easy to popularize, and can effectively stop water and prevent piping, and almost all supporting and protecting facilities can be reused after being disassembled.
Owner:深圳市兴班建筑工程有限公司 +4
Revetment structure composed of plastic steel plate piles and concrete
ActiveCN104695380AReduce the impactCombination structure is stableBreakwatersQuaysStructural engineeringRevetment
The invention relates to a revetment structure composed of plastic steel plate piles and concrete. The revetment structure comprises plastic steel plate piles and a concrete coping, wherein the plastic steel plate piles are connected through a connector having two mutually matched ends; the concrete coping is preformed and can be stably buckled with the upper ends of the plate piles. The revetment structure can be used for revetments of rivers or lakes, is safe and stable, high in construction speed, low in construction cost, environment-friendly and pollution-free, less in influence on the surrounding environment, and long in durability, can be further used for resisting the seepage of embankments and dike bodies of rivers and protecting dams.
Owner:海盐汇祥新型建材科技有限公司
Method for constructing liquified discarded soil in construction of subaqueous structure
InactiveCN101691755AAvoid prone to sudden sinkingPrevent pipingBreakwatersQuaysSoil horizonWater column
The invention relates to a method for constructing liquified discarded soil in the construction of a subaqueous structure, which comprises the following steps: (1) manufacturing a structure with a bottom plate or a fence; (2) installing a vibrator or a high-pressure water or high-pressure gas spraying device at the lower part of the bottom plate or the fence of the structure; (3) generating vibration by the vibrator installed at the lower part of the bottom plate or the fence, or spraying out a high-pressure water column or gas by the high-pressure water or high-pressure gas spraying device and liquifying a soil layer within a sinkage range of the structure; and (4) installing a slurry discharge pipe on the bottom plate of the structure in a way of penetrating through the bottom plate, installing high-pressure gas spraying devices at the lower part and the middle part of the slurry discharge pipe, discharging slurry under the function of high-pressure gas sprayed by the high-pressure gas spraying devices and enabling the structure to continuously sink. The construction of constructing a large bridge foundation, a subaqueous tank body, a subaqueous bunker, a caisson of a gravity type wharf or a revetment, a sand filling or rubble tipping embankment of sea filling cofferdam engineering, a caisson or a rubble tipping embankment of a bulwark or a jetty and the like is safe, the cost is lowered, and the construction period is shortened.
Owner:卢如年
Deep foundation pit precipitation support construction method applicable to coastal region
ActiveCN102787607AGuaranteed precipitation effectPrevent piping and quicksandExcavationsSteel platesPiping
The invention discloses a deep foundation pit precipitation support construction method applicable to a coastal region. The deep foundation pit precipitation support construction method comprises the following steps of digging a foundation pit according to the shape of preset space; forming support piles and a water stopping curtain on the periphery of the foundation pit; arranging steel plate water stopping piles on the inner wall of the foundation pit; and arranging a light well point between each steel plate water stopping pile and the corresponding adjacent support pile. By the deep foundation pit precipitation support construction method applicable to the coastal region, the light well points for precipitation and the steel plate water stopping piles are arranged pointedly according to staggered distribution conditions of quicksand layers and water-resisting layers of the coastal region, and a precipitation effect of the deep foundation pit is guaranteed. In addition, by the steel plate water stopping piles, underground water can be stopped from bypassing a channel of the water stopping curtain, piping and quicksand can be prevented, and the construction quality of the deep foundation pit of the coastal region is ensured.
Owner:DAYUAN CONSTR GRP
Watertight device of heading machine for passing in and out door opening
ActiveCN102011600ASpace reduction or avoidanceOther construction work went wellUnderground chambersTunnel liningMechanical engineering
The invention discloses a watertight device of a heating machine for passing in and out a door opening. The watertight device is used for a working well which is provided with an enclosure structure, the enclosure structure is provided with the door opening, the watertight device comprises a freezing pipe for injecting a refrigerant, the freezing pipe is partially or fully wound around the inner wall of the door opening, and the enclosure structure is also provided with a grouting pipe communicated with the space encircled by the freezing pipe. The invention also discloses another watertight device of the heading machine for passing in and out an door opening, wherein the watertight device is used for a working well which is provided with an enclosure structure, a lining structure is arranged at the inner side of the enclosure structure and provided with the door opening, the watertight device comprises a freezing pipe for injecting a refrigerant, the freezing pipe is partially or fully wound around the inner wall of the door opening, and the lining structure is also provided with a grouting pipe communicated with the space encircled by the freezing pipe. On the premise of meetingwatertight requirement on the heading machine for passing in and out the door opening, the invention fully utilizes the space of the enclosure structure or the lining structure to reduce or avoid theinternal working well space occupied by the watertight device for passing in and out the door opening.
Owner:SHANGHAI CONSTRUCTION GROUP
Seawater lifting device
ActiveCN108609123AAvoid shakingEasy loadingWaterborne vesselsFloating buildingsLocking mechanismDrive motor
The invention discloses a seawater lifting device. The seawater lifting device comprises a tower frame and a driving mechanism, wherein the tower frame is movably inserted and installed on an ocean platform; the driving mechanism comprises a driving motor and a gear box, and is used for driving the tower frame to move up and down in the ocean platform; the seawater lifting device further comprisesa lifting mechanism and a locking mechanism, wherein the lifting mechanism is arranged on a chord pipe of the tower frame to suck seawater into the chord pipe of the tower frame, and the locking mechanism comprises a locking plate, a locking bracket, a locking baffle and a locking bolt, wherein the locking plate is fixedly arranged on the side wall of the chord tube of the tower frame; the locking bracket is fixedly arranged on the ocean platform, a groove is formed in the side wall of the locking bolt, and the locking baffle is detachably arranged on the locking bracket; and the groove is matched with the locking baffle to lock the locking bolt in through holes of the locking plate and the locking bracket or to lock the locking bolt in the through hole of the locking bracket. The seawater lifting device solves the problems of poor stability and low safety of the seawater lifting device under the working conditions of storm or heavy wind and waves.
Owner:WUHAN MARINE MACHINERY PLANT +1
Road landslide emergency and permanent retaining integrated structure and construction method thereof
ActiveCN109750571AFast constructionEnsure trafficArtificial islandsUnderwater structuresSocial benefitsEconomic benefits
The invention discloses a road landslide emergency and permanent retaining integrated structure and a construction method thereof. The road landslide emergency and permanent retaining integrated structure comprises an emergency retaining structure and a later reinforcing structure; the emergency retaining structure comprises a stone cage, a steel pipe pile antiskid key, an anchorage device, a steel bar inhaul cable, geogrid, filling soil, an emergency rush-repair pavement and a fabricated steel plate; and the later reinforcing structure comprises a gravity-type retaining wall, later filling soil and a later widening pavement. An early emergency retaining structure can be constructed rapidly to ensure vehicle passing in the shortest time; and a gravity-type retaining wall reinforcing emergency retaining structure can continue to be constructed directly in the later period under the situation of ensuring emergency vehicle passing, the permanent retaining structure can be formed without altering the early emergency retaining structure, and higher social benefits and economic benefits are achieved. The construction method is simple and easy to implement, and construction is fast.
Owner:HEBEI UNIV OF TECH
Method for lowering seepage line of body of dam by adopting osyris wightiana guide filtration
InactiveCN1412390AEffective drainage consolidationNo damageFoundation engineeringMarine site engineeringFiltrationEngineering
The method for lowering seepage line of dam body by adopting "sand nail" guide filtration process includes the following steps: digging hole on the slope of foot of dam foundation of back slope of dam body, hole direction is parallel or roughly parallel to water level, diameter of hole is 70-90 mm and its depth is 2-6 m; filling or placing the material in which the water is easily penetrated intothe hole to form sand needle, then closing the hole mouth with mixed sand and stone material, restoring external form of dam slope, guiding the water in the dam body into hole mouth and discharging the water into exterior from dam body, distance between nails is 1-1.5m, the sand nails are arranged in single row or two rows mode.
Owner:刘燕翊
Flood protection water bag and manufacturing and construction method thereof
InactiveCN106592523APrevent water seepagePrevent pipingDamsClimate change adaptationEngineeringWater block
The invention relates to a dam body water-retaining and water-blocking device for a water conservancy project, in particular to a flood protection water bag. The flood protection water bag comprises a water bag main body and a water bag skirt body. A water inlet / outlet is formed in the water bag main body. The water bag skirt body is connected to the lower side of the water bag main body. A skirt body falling bag is arranged at the lower end of the water bag skirt body. The two ends of the water bag main body and the left side and the right side of the water bag skirt body are provided with zippers. Multiple flood protection water bag units are connected through the zippers into a whole, embankment water seepage can be prevented by the water bag skirt body, piping is prevented, and the height of an embankment can be increased after the flood protection water bag main body is filled with water, so that the flood protection level is increased, and the flood protection function is achieved.
Owner:SUZHOU DUOGU ENG DESIGN CO LTD
Foundation pile and construction method thereof
InactiveCN102102363AImprove lateral gripPrevent inflowBulkheads/pilesStructural engineeringCement slurry
The invention relates to a foundation pile and a construction method thereof. The foundation pile comprises a top cover, an encircling wall which extends downwards from the periphery of the top cover, a division plate which is connected to the encircling wall in a mode of being spaced with the top cover, two positioning holes which pass through the encircling wall in opposite directions, and a plurality of pressure relief holes which pass through the encircling wall, wherein an accommodating space is formed by matching the encircling wall with the top cover; and the division plate divides the accommodating space into a first accommodating part positioned between the top cover and the division plate and a second accommodating part spaced with the first accommodating part. The invention also discloses the construction method of the foundation pile. The division plate prevents cement slurry from flowing into the first accommodating part, the pressure relief holes can avoid the piping phenomenon, and the transverse bond stress of the foundation pile can be better improved after the cement slurry is solidified.
Owner:DEHAN INTELLECTUAL TECH
Water draining and pressure relieving structure capable of realizing anti-floating
PendingCN107794954AReduce gapAvoid corrosionProtective foundationWater leakUltimate tensile strength
The invention discloses a water draining and pressure relieving structure capable of realizing anti-floating. The water draining and pressure relieving structure capable of realizing anti-floating comprises a well wall pipe and a slow expansion type hydro-expansive antipriming pipe. The slow expansion type hydro-expansive antipriming pipe is arranged outside the well wall pipe in a sleeving manner. A micro-expansionary fine aggregate concrete layer is arranged between the slow expansion type hydro-expansive antipriming pipe and the well wall pipe. The outer diameter of the slow expansion typehydro-expansive antipriming pipe corresponds to the inner diameter of a water draining hole in which the slow expansion type hydro-expansive antipriming pipe is located. The structure has the advantages that when water leaks out of the well wall pipe, both the slow expansion type hydro-expansive antipriming pipe and the micro-expansionary fine aggregate concrete layer expand, and at the moment, the gap between the slow expansion type hydro-expansive antipriming pipe and the inner side wall of the water draining hole decreases, so that the corrosion to a floor layer due to the outflow, from theexterior of a well wall to the floor layer, of the water under the floor layer can be effectively prevented, the strength of the floor layer is lowered and the function of anti-floating is realized;the water under the floor layer is drained out through the well wall pipe, so that the buoyancy which is applied to the floor layer by the water is reduced and the function of pressure relieving is realized.
Owner:HEFEI UNIV OF TECH
Hydraulic cylinder
ActiveCN103452956ASave powerReduce oil pressure differenceFluid-pressure actuatorsHydraulic cylinderMechanical engineering
The invention discloses a hydraulic cylinder, which comprises a cylinder tube, a piston, a piston rod and an end cap, wherein the piston is positioned in the cylinder tube and is used for separating the cylinder tube into a first cavity and a second cavity, the piston rod is positioned at one side of the piston and is fixedly connected with the piston, the end cap is fixedly connected with an opening port of the cylinder tube, the piston rod penetrates out of the end cap, the piston is provided with a limiting device, the limiting device comprises a first one-way valve, a second one-way valve and a first push rod, an oil outlet of the first one-way valve is communicated with a first cavity, an oil inlet of the first one-way valve is communicated with an oil inlet of the second one-way valve, an oil outlet of the second one-way valve is communicated with the second cavity, one end of the first push rod extends into the second cavity, the first push rod can slide along the cylinder tube in the axial direction, and then the other end of the first push rod jacks up a valve core of the first one-way valve. The hydraulic cylinder has the advantages that the power in the piston movement process is reduced, and the piston is prevented from colliding with the end cap or the bottom wall of the cylinder tube, so the cylinder tube is protected.
Owner:河北雷萨重型工程机械有限责任公司
Flood-fighting rescue device
A flood-fighting rescue device relates to flood-fighting equipment, and solves the problems of rescue difficulty, timely in place rescue unavailability, poor flood-fighting defense effects and high operation cost of existing flood-fighting modes. The flood-fighting rescue device comprises a water delivery and supply unit, a first waterproof fabric bag, a second waterproof fabric bag, a heavy bag, a plurality of water drain valves and a plurality of water storage pipes. The water delivery and supply unit comprises a water delivery pump, a check valve, a water storage container, a water separator, a first regulating valve, a plurality of second regulating valves and a plurality of third regulating valves. The outlet end of the water delivery pump is communicated with the inlet end of the check valve, the outlet end of the check valve is communicated with the water storage container, the water storage container is communicated with the water separator, the first regulating valve is mounted on a pipe communicated the water storage container and the water separator, the lower portion of the first waterproof fabric bag is connected with the heavy bag, the upper portion of the first waterproof fabric bag is detachably connected with the lower portion of the second waterproof fabric bag, and the upper portion of the second waterproof fabric bag is provided with an extension section. The flood-fighting rescue device is applicable to flood-fighting rescue.
Owner:徐州徐工精密工业科技有限公司
Absorbent article
ActiveUS20190046362A1Prevents pip of be clogPrevent pipingNon-fibrous pulp additionSpecial paperEngineeringFlush toilet
In order to absorb a small amount of liquid, to prevent an absorbent article from being disintegrated by the absorbed liquid, and to prevent piping of a toilet from being clogged even if the absorbent article is flushed into a flush toilet, the absorbent article includes a pulp layer containing a crushed pulp or fibers mainly containing a crushed pulp, and the pulp layer has a water repellent surface layer portion formed by applying a water repellent agent to at least one surface layer portion.
Owner:SELF SETTLED TRUST OF YAMADA KIKUO
Vegetation type ecological concrete slope protection and construction method thereof
PendingCN108708383AIncreased durabilityImprove stabilityHops/wine cultivationTurf growingEngineeringSlurry
The invention relates to a vegetation type ecological concrete slope protection and a construction method thereof. The vegetation type ecological concrete slope protection comprises a bearing table, athree-dimensional trapezoid structure slope protection body located on the bearing table, an upper drainage ditch arranged on the top face of the slope protection body, a lower drainage ditch arranged in front of the bottom face of the slope protection body, an ecological concrete layer paved on the inclined face of the slope protection body and a discharge pipeline system communicating between the ecological concrete layer and the upper drainage ditch. A groove is formed in the bottom face of the ditch edge of the inner side of the upper drainage ditch, hoisting rings on strengthened ribs paved on the uppermost layer are arranged in the groove, a through groove is formed in the bottom face of the ditch edge of the inner side of the lower drainage ditch, hoisting rings on strengthened ribs paved on the lowermost layer are arranged in the through groove, the groove and the through groove are filled with grout to be connected with the upper drainage ditch and the lower drainage ditch into a whole. The vegetation type ecological concrete slope protection solves the problem that an existing slope protection structure is poor in stability, large in construction difficulty and low in construction efficiency.
Owner:HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
Color system sub-tube branching device for integrated pipe corridor communication pipe and installation method thereof
InactiveCN108493887AAvoid problems such as entanglement and knottingProtect Complementary ImpactsCable installations in underground tubesEngineering communicationControl engineering
The invention belongs to the field of integrated pipe corridor engineering communication engineering of an urban underground pipe network system and relates to a color system sub-pipe branching devicefor an integrated pipe corridor communication pipe and an installation method thereof. The device comprises a reserved PVC pipe, and two ends of the reserved PVC pipe are equipped with a sealing flange, a positioning sleeve and a seven-color sub-tube. A limiting convex ring is inwardly formed from the inner edge of a side end part of the sealing flange away from the reserved PVC pipe, and a groove is formed between the limiting convex ring and an inner wall of the sealing flange. A positioning sleeve is embedded in the groove, and a receiving groove for receiving an end part of the seven-color sub-tube is made in the positioning sleeve. The seven-color sub-tube comprises an outer sleeve tube, and seven inner sleeve pipes uniformly pass the internal part of the outer sleeve tube. The seveninner sleeve pipes are hollow and are used for passing communication cables. The outer edges of the seven inner sleeve pipes are in contact with each other to form an integral inner tube, two side end parts of the inner tube extend from two ends of the outer sleeve tube, and one end part of the inner tube is embedded in the receiving groove made in the positioning sleeve.
Owner:MCC TIANGONG GROUP
Construction method of weight-balanced barricade with pile foundation and trimmer beam
InactiveCN111622216AAvoid deformationImprove deformation resistanceArtificial islandsUnderwater structuresArchitectural engineeringCrushed stone
The invention relates to a construction method of a weight-balanced barricade with a pile foundation and a trimmer beam and belongs to the technical field of construction of weight-balanced barricadeswith pile foundations and trimmer beams. A pile hole is constructed by adopting a drilling process by a rotary excavating wet process to prevent quality accidents such as hole collapse and shrinkagecavity. When a reinforcement cage is hoisted, two point hoisting is adopted, so that deformation of the reinforcement cage can be prevented effectively. After a guide pipe is mounted, the hole is cleaned again by means of the guide pipe, so that the later pouring quality can be guaranteed effectively. In trimmer beam construction, the pile foundation and the trimmer beam are integrally connected conveniently by means of a pile head ringing construction process, and the reinforcement cage at the top end of the pile foundation is inserted into the trimmer beam. In weight-balanced barricade construction, a triple filter structure is formed by a gravel layer, a sand filter layer and geotechnical filter cloth, so that piping and soil flow can be prevented effectively. In addition, soft permeable pipes are arranged along the length direction of the weight-balanced barricade to form a longitudinal draining structure, so that the drainage effect is further improved.
Owner:CHENGDU CONSTR ENG GROUP CORP
A revetment structure combined with plastic sheet piles and concrete
ActiveCN104695380BCombination structure is stableFast constructionBreakwatersQuaysEngineeringRevetment
The invention relates to a revetment structure composed of plastic steel plate piles and concrete. The revetment structure comprises plastic steel plate piles and a concrete coping, wherein the plastic steel plate piles are connected through a connector having two mutually matched ends; the concrete coping is preformed and can be stably buckled with the upper ends of the plate piles. The revetment structure can be used for revetments of rivers or lakes, is safe and stable, high in construction speed, low in construction cost, environment-friendly and pollution-free, less in influence on the surrounding environment, and long in durability, can be further used for resisting the seepage of embankments and dike bodies of rivers and protecting dams.
Owner:海盐汇祥新型建材科技有限公司
a hydraulic cylinder
ActiveCN103452956BSave powerReduce oil pressure differenceFluid-pressure actuatorsHydraulic cylinderEngineering
The invention discloses a hydraulic cylinder, which comprises a cylinder tube, a piston, a piston rod and an end cap, wherein the piston is positioned in the cylinder tube and is used for separating the cylinder tube into a first cavity and a second cavity, the piston rod is positioned at one side of the piston and is fixedly connected with the piston, the end cap is fixedly connected with an opening port of the cylinder tube, the piston rod penetrates out of the end cap, the piston is provided with a limiting device, the limiting device comprises a first one-way valve, a second one-way valve and a first push rod, an oil outlet of the first one-way valve is communicated with a first cavity, an oil inlet of the first one-way valve is communicated with an oil inlet of the second one-way valve, an oil outlet of the second one-way valve is communicated with the second cavity, one end of the first push rod extends into the second cavity, the first push rod can slide along the cylinder tube in the axial direction, and then the other end of the first push rod jacks up a valve core of the first one-way valve. The hydraulic cylinder has the advantages that the power in the piston movement process is reduced, and the piston is prevented from colliding with the end cap or the bottom wall of the cylinder tube, so the cylinder tube is protected.
Owner:河北雷萨重型工程机械有限责任公司
Supporting and construction method of steel sheet pile under soft foundation of high flow plastic deep layer
InactiveCN103343538BSimplify the construction processEffective water stopExcavationsBulkheads/pilesPurlinSheet pile
The invention relates to supporting and construction method of a steel sheet pile under soft foundation of a high flow plastic deep layer, and belongs to the technical field of building construction. The supporting and construction method of the steel sheet pile under the soft foundation of the high flow plastic deep layer comprises the steps of construction preparation, construction of guiding purlins, injection of a steel sheet pile, excavation and water drainage, foundation trench interior construction and removing of the steel sheet pile. The supporting and construction method of the steel sheet pile under the soft foundation of the high flow plastic deep layer is simple and easy to implement during the construction process, is easy to popularize, and can effectively stop water and prevent piping, and almost all supporting and protecting facilities can be reused after being disassembled.
Owner:深圳市兴班建筑工程有限公司 +4
Hard cutting pile-forming construction method for secant piles in high-water-level complex geological area
PendingCN112459050APrevent collapseImprove construction efficiencyDirectional drillingRotary drillingReinforced concreteRebar
The invention discloses a high-water-level complex geological area secant pile hard cutting pile forming construction method. The method comprises the steps that S1, pile position numbering is conducted; S2, plain concrete piles are constructed firstly, and more than three piles are constructed and separated; S3, after the first plain concrete pile and the third plain concrete pile reach 70% of the design strength, a second reinforced concrete pile is constructed, and more than three piles are constructed and separated; In the step S2 and the step S3, a drill rod of the rotary drilling rig iscylindrical, a plurality of vertical ribs which are evenly distributed in the circumferential direction are arranged on the outer wall of the drill rod, and all the ribs penetrate through the lower end of the outer wall of the drill rod. After the drill hole is drilled in place, reversing and retreating; the plain concrete piles and the hole wall, the reinforced concrete piles and the hole wall, and the plain concrete piles and the reinforced concrete piles are spirally meshed in a zigzag mode after pouring forming. The device is specially used for high-water-level complex geological areas tosolve the technical problem that holes cannot be formed due to high-water-level complex geology, and is efficient, rapid, safe and reliable, and the construction quality is guaranteed.
Owner:CHINA FIRST HIGHWAY ENG +1
Method for lowering seepage line of dam by adopting osyris wightiana guide filtration
InactiveCN1176272CEffective drainage consolidationNo damageFoundation engineeringMarine site engineeringFiltrationEngineering
The method for lowering seepage line of dam body by adopting "sand nail" guide filtration process includes the following steps: digging hole on the slope of foot of dam foundation of back slope of dam body, hole direction is parallel or roughly parallel to water level, diameter of hole is 70-90 mm and its depth is 2-6 m; filling or placing the material in which the water is easily penetrated into the hole to form sand needle, then closing the hole mouth with mixed sand and stone material, restoring external form of dam slope, guiding the water in the dam body into hole mouth and discharging the water into exterior from dam body, distance between nails is 1-1.5m, the sand nails are arranged in single row or two rows mode.
Owner:刘燕翊
Double-layer water well pipe with filtering structure
PendingCN109811827APrevent pipingMeet irrigation requirementsWater conservationDrinking water installationFiltrationWater quality
The invention discloses a double-layer water well pipe with a filtering structure. The double-layer water well pipe comprises a pipe body, wherein the pipe body consists of a water seeping outer pipeand a water seeping inner pipe which are coaxially sleeved together distantly; the pipe wall of the water seeping outer pipe is sleeved by a non-woven filter screen; the hole diameters of through holes uniformly formed in the pipe walls of the water seeping inner pipe and the water seeping outer pipe are not greater than 1mm; a small gravel and cobble layer and a medium and coarse sand layer are arranged in an annular space between the water seeping inner pipe and the water seeping outer pipe from inside to outside respectively; the small gravel and cobble layer and the medium and coarse sandlayer are arranged in coaxial cylindrical structures; the grain diameter of medium and coarse sand in the medium and coarse sand layer is 0.25-1.5mm; the grain diameter of small gravels and cobbles is1-4mm. After double-layer filtration, the water quality in a well meets irrigation requirements. The double-layer water well pipe is applied to irrigation by drilling the well for taking water in a fine sand stratum, can prevent fine sand from generating piping erosion and quicksand effects through coarse aggregate and makes water clear.
Owner:新疆铁道勘察设计院有限公司
A construction method for deep foundation pit dewatering support suitable for coastal areas
ActiveCN102787607BGuaranteed precipitation effectGuarantee the construction qualityExcavationsWater stopCoastal zone
The invention discloses a deep foundation pit precipitation support construction method applicable to a coastal region. The deep foundation pit precipitation support construction method comprises the following steps of digging a foundation pit according to the shape of preset space; forming support piles and a water stopping curtain on the periphery of the foundation pit; arranging steel plate water stopping piles on the inner wall of the foundation pit; and arranging a light well point between each steel plate water stopping pile and the corresponding adjacent support pile. By the deep foundation pit precipitation support construction method applicable to the coastal region, the light well points for precipitation and the steel plate water stopping piles are arranged pointedly according to staggered distribution conditions of quicksand layers and water-resisting layers of the coastal region, and a precipitation effect of the deep foundation pit is guaranteed. In addition, by the steel plate water stopping piles, underground water can be stopped from bypassing a channel of the water stopping curtain, piping and quicksand can be prevented, and the construction quality of the deep foundation pit of the coastal region is ensured.
Owner:DAYUAN CONSTR GRP
Foundation pile and construction method thereof
The invention relates to a foundation pile and a construction method thereof. The foundation pile comprises a top cover, an encircling wall which extends downwards from the periphery of the top cover, a division plate which is connected to the encircling wall in a mode of being spaced with the top cover, two positioning holes which pass through the encircling wall in opposite directions, and a plurality of pressure relief holes which pass through the encircling wall, wherein an accommodating space is formed by matching the encircling wall with the top cover; and the division plate divides theaccommodating space into a first accommodating part positioned between the top cover and the division plate and a second accommodating part spaced with the first accommodating part. The invention also discloses the construction method of the foundation pile. The division plate prevents cement slurry from flowing into the first accommodating part, the pressure relief holes can avoid the piping phenomenon, and the transverse bond stress of the foundation pile can be better improved after the cement slurry is solidified.
Owner:DEHAN INTELLECTUAL TECH
Construction method for pipe jacking with sand layers
InactiveCN108798693AReduce disturbanceImprove the consolidation effectTunnelsPipeflowPhosphoric acid
The invention relates to the technical field of pipe jacking, in particular to a construction method for the pipe jacking with sand layers. The construction method comprises the following steps that step one, according to the scheme for arranging holes, a grouting opening is formed by drilling of a drilling machine; step two, a phosphoric acid solution and glassy water are poured into the groutingopening synchronously; step three, after the phosphoric acid solution and the glassy water condense, the glassy water and cement paste are poured into the grouting opening synchronously; and step four, after the glassy water and the cement paste condense, pipelines are placed and the pipe jacking operation is carried out. Before the pipe jacking operation is carried out, two kinds of liquid are poured into the grouting opening before and after, the phosphoric acid solution and the glassy water of the step two condense by mixing, the glassy water and the cement paste of the step three condenseby mixing, and the double actions of the two play a good role in the consolidation of groundwater and quicksand and play a good role in reducing the sand layer disturbance during the subsequent pipejacking operation, and can effectively prevent settlement of surrounding road surface and buildings. Meanwhile, later pipe jacking operation is further facilitated, the construction efficiency is improved, and the gushing mud is not prone to appearing.
Owner:HAIWEI ENG CONSTR CO LTD OF FIRSTHIGHWAY ENG CO LTD OF CCCC
Watertight device of heading machine for passing in and out cavity
ActiveCN102011600BSpace reduction or avoidanceOther construction work went wellUnderground chambersTunnel liningEngineeringMechanical engineering
Owner:SHANGHAI CONSTRUCTION GROUP
Sandy soil embankment construction method
InactiveCN110438943APrevent pipingImprove stabilityCoastlines protectionReceptacle cultivationSoil scienceHydraulic engineering
The invention relates to a sandy soil embankment construction method, and relates to the technical field of water conservancy engineering. The sandy soil embankment construction method includes the following steps that S1, foundation cleaning is conducted, specifically, debris and a soft soil layers on the original ground are cleared, and a dense soil layer is exposed; S2, filling is conducted, specifically, sandy soil is filled and compacted in layers and sections; S3, toe fixing is conducted, specifically, a gabion stone cage fixing toe is used for being arranged at the revetment bottom on the water corresponding side of an embankment body; S4, slope protection is conducted, specifically, non-woven fabrics, a sand gravel cushion and a Reno mattress are successively laid on a revetment onthe water corresponding side; and S5, a diaphragm wall is formed, specifically, a mixing drilling rig is used for forming interlocked mixing piles in the embankment body, the mixing piles are inserted into an embankment foundation, and the diaphragm wall for seepage prevention of the embankment body and the embankment foundation is formed by interlocking. According to the sandy soil embankment construction method, the ant-seepage and anti-impact properties of a reinforcing dam are effectively improved.
Owner:江河水利水电咨询中心有限公司
Construction method of composite steel sheet pile cofferdam for deep-water cap of steep-slope hard-rock river bed
The invention discloses a combined type steel sheet pile cofferdam for a deepwater bearing platform located in an abrupt slope hard rock river bed and a construction method, and belongs to the technical field of building construction. The construction method is improved based on a traditional construction method for the steel sheet pile cofferdam, and aims at overcoming the defects existing in construction of the deepwater bearing platform at present, located in the abrupt slope hard rock river bed, of a bridge, the combined type steel sheet pile cofferdam suitable for constructing the deepwater bearing platform located in the abrupt slope hard rock river bed can be formed by improving the arrangement mode of the combined type steel sheet pile cofferdam in water and the structure of the combined type steel sheet pile cofferdam, and the new construction method, which is simple, efficiency and safe, for the deepwater bearing platform located in the abrupt slope hard rock river bed is provided.
Owner:BEIJING UNIV OF TECH
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