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723 results about "Ground water level" patented technology
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Cement concrete permeable brick, permeable road and production methods thereof
InactiveCN101671987AComply with quality deviationMitigate the heat island effectSingle unit pavingsClimate change adaptationPondingBrick
The invention relates to a cement concrete permeable brick, a cement concrete permeable road and production methods thereof. At present, most of urban construction adopting the rigid hardened ground has the problems of dust blowing at a fine day, water accumulation and impermeable ground at a rainy day, no groundwater level supplement, no relief of urban heat island effect, and the like. The invention aims to develop a cement concrete permeable brick, a cement concrete permeable road and production methods thereof. The cement concrete permeable brick is formed by pressing and molding a base material layer and a surface material layer, and both the base material layer and the surface material layer contain cement, sand, stone, water adsorbing resin, asphalt powder, diffusant and a water reducing agent. The production method of the permeable brick is realized by molding the permeable brick by a computer full-automatic building block forming machine; and the production method of the cement concrete permeable road is realized by directly pressing the cement concrete permeable road through a road roller. The invention can achieve the aims of water adsorption, water retention, permeability and practicability, can be widely used for a highway, an airport runway, a roadway, a footway, a square, garden construction, and the like and solve the problem of road icing.
Owner:SHAANXI SUNSHINE RAIN ECOLOGICAL TECH
Telescoping post supports and sliding lid systems for filter baskets
Devices, apparatus, systems and methods of using an adjustable filter basket on telescoping post supports to raise and lower the filter basket so as to adjust the position of the inlet chute for different ground water levels in storm water treatment systems, along with horizontal slidable lids in tracks on the basket that allow access to the inside of the basket in vaults having ceilings close to the top of the baskets. A single winch point or floats can be used to raise and lower the filter basket on the telescopic post supports.
Owner:OLDCASTLE INFRASTRUCTURE INC
Slurry wall protection construction method for bored pile
InactiveCN104120716AResolve skewSolve the problem of pile body concrete with mudBulkheads/pilesSlurry wallArchitectural engineering
The invention discloses a slurry wall protection construction method for a bored pile. The slurry wall protection construction method includes the following steps that step 1, a pile hole is positioned; step 2, a pile casing is buried; step 3, a drilling machine is in place; step 4, qualified slurry is prepared; step 5, hole forming and hole clearing are performed; step 6, a steel reinforcement cage is lifted for placing; step 7, underwater concrete is cast. According to the slurry wall protection construction method for the bored pile, operation is easy, the problems that the pile hole deviates, and pile body concrete is mixed with slurry are solved, and the construction method is suitable for slurry wall protection hole forming bored pile engineering of soft and hard soil layers high in underground water level in industrial and civil buildings.
Owner:杨哲
A multi-index comprehensive evaluation and early warning method for slope stability
The invention relates to a multi-index comprehensive evaluation and early warning method for slope stability. The method comprises the steps of monitoring landslide displacement, rainfall and underground water level data and pre-processing the acquired data; determining a landslide rear edge deformation crack connection rate and a vertical displacement direction rate; dividing landslide into stability stages according to landslide stability evaluation indexes and setting qualitative and quantitative criteria; determining a sensitive rate of each evaluation index for landslide stability; determining a comprehensive evaluation value of the overall stability of landslide; determining landslide stability stage division and monitoring early-warning levels. The method comprehensively takes macroscopic geological deformation conditions, such as slope main slide area displacement monitoring point deformation and slope uplift and subsidence features, into consideration, selects multiple qualitative and quantitative indexes reflecting the overall stability of slopes, builds a quantitative evaluation model for the overall stability of slopes by using a weighting evaluation method, definitelyreflects an overall dynamic evolution process of landslide, comprehensively performs stage division and monitoring early-warning on the overall stability of slopes and increases the accuracy of prediction models.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Construction method for pulling-resistant and pressure-resistant slip casting pipe pile
InactiveCN101058979ASolve the problem of insufficient pullout resistance of pullout pilesImprove pull resistanceBulkheads/pilesCrushed stoneWater table
A construction method of casting pipe pile plucking with resistance to plucking and pressing, The invention relates to a construction method of pipe pile. The purpose of the invention is: solving the insufficient problems of resistance to plucking and pressing happened in the buildings which are built under complex geological conditions or under higher groundwater level geological strata and the problems are generated by bottom board percolating water due to buildings bottom board plucking resistance is insufficient, declination due to excessive eccentricity when design buildings and when design the resistance to plucking of new buildings. The invention drills hole downward on the buildings basic layer according the design height mark and bore diameter of pipe pile, lifts downward steel pipes or plastic pipes with slip casting hole after the drilled hole is completed, lifts downward reinforcement bar or reinforcement cage in the hole out the steel pipes or plastic pipes, lifts downward sands and broken stone between the outer wall of the steel pipes or plastic pipes and the hole wall. The invention has extremely distinctive action in buildings plucking-resistance and reinforcement, buildings declination correction and the foundation reinforcement project of house floors addition and reconstruction. The pile type in the invention is suitable for various geological strata, it can be used for the plucking-resistance, reinforcement and foundation reinforcement of prior buildings and the resistance-plucking pile construction of new buildings.
Owner:何新东
Swimming pool drain
InactiveUS20060015996A1Reduce the average velocityIncrease volumeGymnasiumSwimming poolsLine tubingLow speed
A sump for a swimming pool or spa includes a grate having an elongated slot for inflow of water at a low velocity high flow rate. A housing of relatively large capacity includes an outlet for conveying water to an oversized suction line to maintain the low velocity high flow rate to the junction with a conventionally sized standard suction line in fluid communication with a suction pump. A bypass line in fluid communication with the water in the pool or spa discharges water into the housing when the slot is sufficiently covered to prevent satisfying the flow rate into the suction line demanded by the pump and thereby prevent a level of suction at the slot sufficient to entrap clothing or a body part of a swimmer against the grate. The grate, a frame supporting the grate on the housing and the housing are devoid of elements that might cause entanglement of hair drawn into the sump. A hydrostatic valve may be coupled with the housing at locations of a pool or spa where the ground water level is sufficiently high to cause flotation of the pool or spa when partially filled or empty.
Owner:GSG HLDG
Foundation pit dewatering well pressure-reduction-type plugging method
ActiveCN103343543AKeep the well closedImprove construction efficiencyFoundation engineeringWater flowStructural engineering
The invention provides a foundation pit dewatering well pressure-reduction-type plugging method. The method comprises the following steps that (1) at least one water stop ring is arranged on the outer wall of a dewatering well pipe; (2) bottom plate concrete is poured on the outer wall of the well pipe; (3) after the bottom plate concrete of a basement reaches certain strength, unnecessary well pipes on the surface of a bottom plate are cut off, and a drainage floral tube is inserted in the lower portion of a well pipe; (4) when the well is plugged, a water pump in the dewatering well pipe is lifted out, a drainage pump is started to drain water, and well plugging materials are then filled in the dewatering pipe sequentially; (5) the drainage pump stops working, and a small amount of gushing water flows out of the floral tube by itself; (6) a mud jacking pump is started to press curing agents in the dewatering well pipe; (7) the opening of the well pipe is plugged through a cover plate, the periphery of the well pipe is plugged through high-strength concrete, and dewatering well plugging is finished. The foundation pit dewatering well pressure-reduction-type plugging method is particularly suitable for engineering such as a basement which is high in underground water level, large in the amount of gushing water and high in water-proof requirements, very wide in application range, high in construction efficiency, convenient to operate and good in water plugging effect, and ensures that a later-period is hardly affected.
Owner:CHINA FIRST METALLURGICAL GROUP
Multi-layer soil water fertilizer migration and transformation parameters testing device and method
InactiveCN105334311AIn line with the actual situationImplement test analysisEarth material testingSoil scienceAssay
The invention relates to a multi-layer soil water fertilizer migration and transformation parameters testing device and a method, which comprises steps: (a) cylindrical organic glass inner and outer columns and layered soil columns are made, plum blossom-shaped holes are distributed on a specify height in organic glass, and soil columns are packed by cylindrical organic glass inner columns, and are divided into plough layers, plowing layers and bottom soil layers; (b) soil water potential sensors, negative pressure water-taking samplers and soil water content measurement instruments are respectively embedded in various soil layers; (c) soil water generates lateral seepage water which is discharged into ring-shaped regions between the cylindrical organic glass inner and outer columns through the plum blossom-shaped holes at the same time during the infiltration process, and is extracted into an external device to assay and analyze. The multi-layer soil water fertilizer migration and transformation parameters testing device and the method are used to explore layered soil water fertilizer infiltration and lateral seepage and transformation process thereof, determines drainage contribution rate of vertical seepage and lateral seepage of the layered soil in various conditions, can be provided with different underground water levels, and develops translocation and transformation of soil water fertilizer on various layers and mutual replenishment relationship of soil water and underground water.
Owner:WUHAN UNIV
Method for improving coast salty soil by utilizing cotton straw
InactiveCN101849455AReduce salt contentIncrease organic matterHorticulture methodsSoil-working methodsCrushed stoneBiology
The invention relates to a method for improving coast salty soil by utilizing cotton straw, belonging to the soil improvement technical field. The invention is characterized in that: soil block to be improved is divided on coast salty soil; salty soil more than 20cm higher than ground water level is removed; cotton straws doped with straws are arranged in sequence, flatted and tied up into straw layers with the thickness of 10cm; the straw layers are spread and covered on the salty soil in the same direction and in parallel, broken stones with the grain diameter of 1-2cm are uniformly and additionally covered on the straw layer, the thickness thereof is 5cm, thus forming an isolating layer; so that two isolating layer are formed; and punning is carried out. Ambient salty soil is uniformly covered on the isolating layer; salt tolerant plants are planted in the saline soil; and straw with the thickness of 3cm is covered on the saline soil. By implementing the invention, soil salt content is obviously reduced; and soil organic matter is improved. Isolating effect is obvious, the cotton straw is isolated and also adds soil nutrient, thus being beneficial to plant growth. Operation is simple and convenient, cost is low, and the method can be popularized and applied in large scale; and the cotton straw is recycled.
Owner:SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
Method for monitoring river runoff through remote-sensing hydrologic station
InactiveCN108896117AWide range of monitoringRich time scaleVolume/mass flow measurementPhotogrammetry/videogrammetryAridEarth surface
The invention relates to a method for monitoring river runoff through a remote-sensing hydrologic station. The method comprises the steps of 1, selecting key fluvial sections lacking measuring stationareas; 2, conducting low-altitude remote sensing retrieval on the information of the fluvial sections lacking the measuring station areas; conducting real-time drone control flight on monitoring points of the fluvial sections selected in step 1, preprocessing the obtained data, extracting earth surface information, obtaining the longitudinal section gradient, the cross section area and the watersurface width of the fluvial sections on this basis, combining ground water level monitoring and underwater topographic surveying and mapping, and utilizing a manning formula for deduction to solve the flow of the monitored section. The method has the advantages that satellite remote sensing and low-altitude remote sensing are coupled, each other's advantages are complemented, and the blank of thelack of hydrologic data is filled up; during emergency management, the real-time river channel segment width is obtained, the river runoff is calculated, the river runoff data is reported in real time, and the runoff monitoring precision is smaller than 8%; the problem that hydrometric stations of an arid region are scarce, and cannot handle flood, water pollution and other emergency events is solved.
Owner:BEIJING NORMAL UNIVERSITY +1
Construction method of long open-cut tunnel
ActiveCN101725149ASmall sizeImprove binding efficiencyUnderground chambersEmbankmentsWater levelGround water level
The invention discloses a construction method of a long open-cut tunnel, comprising the following steps of: after reducing ground water level by utilizing precipitation of a tube well, carrying out the slope excavation to be the designed height, sequentially constructing a bed course, waterproof roll and inverted arch and filling, carrying out secondary lining by using inner and outer mould trolleys, constructing external coverage and waterproof engineering, back-filling and compacting. The invention has the advantages that: the construction method has strong scene maneuverability, is easy to popularize, ensures the construction safety, and improves the construction quality of the long open-cut tunnel.
Owner:CHINA RAILWAY NO 2 ENG GRP CO LTD +1
Method and system for prewarning drought and flood disasters of farmlands
ActiveCN103017860ADoes not affect growthSimple mechanism and structureLevel indicators by dip membersWater levelEarth surface
Owner:WUHAN UNIV
Agricultural irrigation water-conversion-with-electricity algorithm management and control system and water-electricity conversion coefficient correction method
ActiveCN106895885AHigh precisionReduce wasteClimate change adaptationVolume/mass flow by electric/magnetic effectsAgricultural irrigationData center
Provided is an agricultural irrigation water-conversion-with-electricity algorithm management and control system. The system comprises a pumping well electricity and water amount acquisition device for agricultural irrigation in a region, a portable water-electricity coefficient measuring device, an electricity data acquisition communication gateway, a water-electricity conversion coefficient reference well, a regional climate data acquisition device, a regional underground water level data acquisition device and a management and control data center; the management and control data center is internally provided with a pumping well water-electricity conversion coefficient data correction model, and all the devices are in data transmission with the management and control data center. According to the management and control system and a correction method, a management and control system is established for each pumping well which calculates the water amount through water conversion with electricity in the region, the real-time and exclusive water-electricity conversion coefficient of each pumping well is determined through the management and control system and the correction method, the precision of calculating the water amount of each pumping well through water conversion with electricity is improved, measurement is precise, maneuverability is high, and input of water amount measuring facilities is greatly reduced.
Owner:唐山海森电子股份有限公司
Methodology for prediction of shallow ground water levels
InactiveUS20050038763A1Digital computer detailsMachines/enginesSite modelEnvironmental resource management
The invention is a process for the development and use of a model for the prediction of shallow ground water level fluctuation. This approach involves using site specific ground water observations for the determination of rate of decline due to infiltration and rate of rise due to precipitation for the ground water level at a site, followed by use of those rates with historic precipitation records to estimate the extent of historic saturation and inundation periods at the site. That information may then be used for the delineation of jurisdictional wetlands and other similar applications. The steps of the process are as follows: 1. Short-term on-site observations of ground water level and rainfall 2. Statistical analysis to determine rainfall response and infiltration rates to develop site model 3. Prediction of past ground water levels using historic rainfall records for the region 4. Estimation of percentage of years meeting wetland regulation criteria
Owner:COLE GEORGE MARTIN +1
Stage and step dynamic control agricultural field drainage design method
InactiveCN101021067AEliminate staining hazardsReduce depthConstructionsSoil drainageDesign standardAgricultural irrigation
The present invention relates to the field of agricultural irrigation drainage technology, in the concrete, said invention provides a staged and graded dynamically-controlled farmland drainage designing method. Said method is characterized by that said designing method mainly includes the following several contents: firstly, according to the actual requirements for drainage designing three stages of early stage, mid-stage and late stage for time division; respectively providing groundwater level dynamic control index, using it as designing standard for drainage engineering with different grades, then correspondently defining spaced distance between drainage ditches for making farmland management, collecting water and conveying water, so that said designing method can effectively raise drainage effect of farmland.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Pollution control and emission reduction method for farmland drainage
InactiveCN102926362AImprove utilization efficiencyEffectively trap and purify drainageConstructionsSoil drainageEngineeringEnvironmental engineering
The invention discloses a pollution control and emission reduction method for farmland drainage. The pollution control and emission reduction method comprises the following steps: arranging a drainage ditch on the drainage side of the farmland, arranging a solidifying protective slope on the side slope of the drainage ditch, planting hygrophyte on the protective slope, and arranging submerged alga plants inside the drainage ditch; arranging water level control gates inside the drainage ditch in a segmented way and controlling the height of the water level of each segment inside the drainage ditch according to the field elevation change status; connecting a drainage river way at the downstream of the drainage ditch, and arranging a flow division control valve at the connected part of the drainage ditch and the drainage river way, wherein the flow division control valve comprises a water inlet, an overflow port and a water permeation hole, wherein a water permeation tube is connected to the water permeation hole; and the water permeation tube is embedded inside the bank slope of the drainage river way. Compared with the prior art, the pollution control and emission reduction method for farmland drainage effective retains and purify the draining water of the farmland, so that on one hand, the effect of precipitation is exerted and the planted hygrophyte can also sufficiently absorb nitrogen and phosphorus contaminant ions in the water, and on other hand, the rice can use part of underground water due to elevation of the underground water level to improve the utilization efficiency of the water.
Owner:HOHAI UNIV
Method for determining side slope critical drainage water line on basis of monitoring
InactiveCN103512631AEmbody practicalityTransmission systemsSatellite radio beaconingStable stateLandslide
The invention relates to a treatment method for determining the position of a landslide drainage water line simultaneously on the basis of the underground water level and displacement monitoring data and coupling analysis. The method for determining the side slope critical drainage water line on the basis of monitoring comprises a first step of landslide monitoring section and monitoring point selection and determination, a second step of installation and arrangement of landslide underground water level and displacement monitoring devices, a third step of real-time monitoring and treatment of the underground water level and displacement, a fourth step of determination of the landslide underground water dynamic increment displacement response rate, a fifth step of determination of a landslide underground water dynamic increment displacement response ratio and a time sequence curve of the landslide underground water dynamic increment displacement response ratio and a sixth step of determination of the landslide critical underground water drainage water line. The landslide drainage water line is obtained by utilizing underground water dynamic increment displacement response ratio parameters so as to treat landslide with underground water serving as a leading trigger factor, the relations between the real landslide water line and a landslide stability state can be reflected visually, and effectiveness and practicality of the method are embodied.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY +1
Technology for cultivating and greening tall fescue grass on inshore mud flat saline-alkali soil
ActiveCN104186137ARapid dehydration dealkalizationIncrease the areaHorticultureAlkali soilSoil science
Owner:SHANDONG SHENLI ENTERPRISE DEV
Construction method for road foundation
The invention relates to a construction method for a road foundation. The foundation is a soft base layer with insufficient bearing capacity; the stratum soil is soft; the topography is low-lying; and the underground water level is high; the construction muck is taken as the backfill of the foundation; the construction muck is mainly composed of brick bats, concrete blocks and stone; the big construction muck is crushed by using a crushing machine till the grain size is within 30cm; and the silty clay is added to the crushed construction muck based on a mixing proportion of 30%-35%, so that the road construction really has the optimized allocation of resources and is investment-saving; the efficiency is increased; and the engineering cost and the resource waste are reduced by recycling the wastes.
Owner:中电建路桥集团有限公司 +2
Defect reinforcing and processing construction method of drill filling pile
The invention discloses a construction method for consolidation treatment of a defective bored pile, which comprises the following steps: 1. measure lofting: according to the result obtained by the sound wave detection of a defective pile foundation, the measure lofting of the defective pile foundation is performed, and the central position of the defective pile foundation and the thickness of the defective position are determined; 2. excavating a central hole: according to the position of the pile foundation undergoing the measure lofting, the hole is excavated from the center of the pile foundation; 3. processing the defective part: when the defective part is reached by manual excavation, the defective part is checked and cleaned, and no less than 0.5m is excavated in thickness; and, 4. casting concrete: reinforcing steel material which is the same as that used in the pile foundation is processed into a reinforcing steel cage for consolidation, the reinforcing steel cage for consolidation is placed on the bottom part of the hole and fixed; the concrete is cast in the mode of layered casting and layered vibration, after casting the concrete, the pile foundation is naturally cured. The method ensures the engineering quality and saves construction cost and time. The method is particularly suitable for the treatment of the casting pile which has high ground water level and big infiltration capacity and of which the defective part is arranged on the medium upper part of the bored pile and less than 10m away from the ground and the diameter is more than 1.5m.
Owner:TIANJIN 20 CONSTR
Underground water depth-setting stratified sampling device and underground water depth-setting stratified sampling method applicable to regions without wells
PendingCN106353141ARealize fluctuation monitoringIncrease authenticityWithdrawing sample devicesProportional Stratified SamplingWater level
The invention belongs to the technical field of underground water sampling and particularly relates to an underground water depth-setting stratified sampling device and an underground water depth-setting stratified sampling method applicable to regions without wells. The underground water depth-setting stratified sampling device at least comprises a sampling mechanism, a connecting mechanism and an underground sample injection mechanism, wherein the sampling mechanism comprises a first sampling mechanism body, a second sampling mechanism body, a sampling bottle, a gas-phase check valve, a nested flow splitting mechanism, a ball valve and a wellhead fixing support seat, the underground sample injection mechanism comprises a first underground sample injection mechanism body and a second underground sample injection mechanism body, and the connecting mechanism comprises a first connecting rod and a second connecting rod. Compared with similar technical products, the underground water depth-setting stratified sampling device applicable to the regions without the wells has the advantages that the device is novel in structural design and improved in working performance, functions, precision, stability and durability substantially, integrates a high-precision stratified sampling function and an underground water level line fluctuation monitoring function and can be rapidly mounted in the regions without the wells.
Owner:WUHAN CENT CHINA GEOLOGICAL SURVEY CENT SOUTH CHINA INNOVATION CENT FOR GEOSCIENCES
Method for constructing artificial dug pile at reduced well point ground water level
The invention relates to the technical field of a construction engineering technology, in particular to a method for method for constructing an artifical dug pile at a reduced well point ground water level, comprising the following steps: a drainage ditch is arranged on the upper periphery of the plane layout of an artificial dug pile; carrying out dewatering well construction at the periphery of the artificial dug pile; pumping water in the dewatering well by a submersible pump; adopting a sawtooth concrete retaining wall for the artificial dug pile; and directly pouring the concrete by a lower reinforcement cage after the artificial dug pile retaining wall is formed. In the invention, the dewatering well is arranged near the artifical dug pile for draining concentrately, and provides a safe construction environment basically having no underground water when the artificial dug pipe is constructed; and the traditional method for constructing single water drawing and chambering in the pile in the process of constructing the artificial dug pile is changed, and high-cost investment of pouring the concrete is not needed. The relative traditional method of the invention lowers the cost and the operation difficulty, and improves the construction efficiency and the safe assurance coefficient.
Owner:中国十九冶集团有限公司湖北分公司
Embedded water permeable plate water collection siphon drainage method for side slope ground water interception
The invention discloses an embedded water permeable plate water collection siphon drainage method for side slope ground water interception. A groove is excavated on the upper middle part of a side slope, a water permeable plate is embedded into the groove, ground water on a shallow surface layer of the side slope is introduced into a water collecting pipe at the bottom of the water permeable plate, and the collected ground water is discharged from the surface of the side slope by a siphon. By the method, infiltrated ground water on the upper part of the side slope can be effectively intercepted, the ground water level of a slope body on the downstream side of an interception area is reduced, the construction cost of engineering for keeping the side slope stable is low, the workload of earth-rock excavation related in the treatment process is low, the implementation process of treatment engineering is simple and practicable, the drainage measure is high in reliability and adaptability and is flexibly used, power is not needed in the drainage process, and the drainage process is not required to be frequently managed or maintained.
Owner:ZHEJIANG UNIV
Portable automatic measuring instrument and measuring method for ground water level and well depth
PendingCN109307544AFully automatedRealize integrationMachines/enginesElectric/magnetic depth measurementDepth in a wellMeasuring instrument
The invention relates to a portable automatic measuring instrument and a measuring method for ground water level and well depth, and belongs to the technical field of special equipment for monitoringground water level and well depth. One end of a measuring line (24) is wound on a main line wheel (49); and the other end of the measuring line (24) passes between a length counter sensor (22) and a line conveying wheel (50), and is connected with a measuring probe (25) through a first measuring line guide hole (23) and then a second measuring line guide hole (51) at the bottom of the shell. The measuring line (24) is composed of a measuring line insulating layer (26), a first lead wire (27), and a second lead wire (28); and the measuring line insulating layer (26) is arranged outside the first lead wire (27) and the second lead wire (28). According to the portable automatic measuring instrument and the measuring method for ground water level and well depth, the measurement for the water level and the well depth are integrated, so that the measurement is greatly simplified, the labor intensity is relieved, the errors that may be caused by artificial sensations in the well depth measurement are eliminated, and the accuracy of the measurement data is greatly improved.
Owner:河北省地质环境监测院
Method for constructing basement foundation pit without horizontal braces
ActiveCN104131566AShorten the lengthSave the depth of cast-in-place pilesExcavationsSoil mixingArchitectural engineering
The invention discloses a method for constructing a basement foundation pit without horizontal braces. The method is used for constructing the basement foundation pit by the aid of a two-stage foundation pit supporting process and includes constructing a circle of closed cement mixing piles along the outer edge of a basement at a first stage and forming a closed waterproof curtain at the outer edge of the basement by the aid of the cement mixing piles; reducing the underground water level in the closed waterproof curtain by the aid of a dewatering well, excavating earth at a first phase and completely constructing prefabricated pipe columns; secondarily supporting the foundation pit by the aid of an SMW (soil mixing wall) construction process at a second stage, completely constructing the waterproof curtain, reducing water by the aid of the dewatering well and then excavating earth below the foundation pit. The method has the advantages that the inner horizontal braces of the foundation pit can be omitted on the premise that the requirement on the foundation pit supporting safety is met, accordingly, the construction cost can be saved, and the construction progress can be accelerated.
Owner:CHINA CONSTR FOURTH ENG DIV
Water settling, spring protection and recharging integrated device for foundation pit engineering
The invention discloses a water settling, spring protection and recharging integrated device for foundation pit engineering. The water settling, spring protection and recharging integrated device is characterized in that one end of a recharging water quality treatment system is connected with a water settling well, the other end of the recharging water quality treatment system is sequentially and serially connected with a water quality monitoring system, a pressurizing and water collecting system, a wellhead device and a recharging well, and the water quality of the sucked underground water is analyzed by the recharging water quality treatment system and the water quality monitoring system; when the recharging water quality requirement is met, the recharging water enters the pressurizing and water collecting system, and the water of the pressurizing and water collecting system enters the recharging well through the recharging wellhead device at fixed flow rate and fixed pressure; when the recharging water quality requirement is not met, the recharging water flows back to the recharging water quality treatment system, and the water quality is analyzed and treated again. The water settling, spring protection and recharging integrated device has the beneficial effects that by utilizing the underground water recharging technique, the stability of the underground water level near the construction area can be effectively controlled, the deformation of adjacent stratum is prevented, and the safety threat of construction on the neighboring residents is reduced.
Owner:JINAN RAILWAY TRANSPORT GRP CO LTD
Method for eliminating pit buoyancy and pit structure
InactiveCN101413273AStrong controllabilityReduce dosageArtificial islandsProtective foundationWater levelCheck valve
The invention discloses a method for eliminating pit buoyancy and a pit structure. The method is to provide spillway holes on the side wall of a pit so that ground water spills into the pit when the ground water level exceeds the spillway holes, so as to increase the sole weight of the pit and eliminate the buoyancy of the ground water to the pit. The pit structure is that one or more than one waterproof sleeve pipe is horizontally embedded on the side wall of the pit, filter screens and water check valves are arranged on the inner ports of the waterproof sleeve pipes, and filter layers are arranged in the waterproof sleeve pipes. The method can effectively reduce or completely eliminate the buoyancy generated by the ground water to the pit; the pit structure is simple and practical; the usage of construction materials can be greatly saved so that the construction cost is reduced and the material wastage is avoided. Besides, the method and the pit structure realize the real-time property and the controllability of buoyancy resistance for pit type buildings.
Owner:GUIYANG AL-MG DESIGN & RES INST
Circulating well system for treating VOCs and DNAPLs in polluted underground water
PendingCN111646577AAvoid scrappingAvoid clogged screensWater contaminantsContaminated groundwater/leachate treatmentBiofilmMicroorganism
The invention provides a circulating well system for treating VOCs and DNAPLs in polluted underground water. An upper-section permeable sieve pore and a lower-section permeable sieve pore are formed in a circulating well pipe, the upper-section permeable sieve pore is a water outlet and corresponds to the underground water level, and the lower-section permeable sieve pore is a water inlet and corresponds to the lower boundary of an underground water polluted area; a gas injection pipe is arranged in the circulating well pipe, the lower end of the gas injection pipe extends to the lower-sectionpermeable sieve hole; a gas phase extraction pipe is arranged in the circulating well pipe and is used for extracting VOCs-containing gas escaping from ascending bubbles in underground water; chemical injection pipes are mounted in a filter material outside a sieve pipe at the upper part of the circulating well pipe, and the bottoms of the chemical injection pipes are close to the bottom of the upper-section permeable sieve hole. Microbial agents in the chemical injection pipes are evenly dispersed in the underground water environment under the action of circulating water at a drain port, andthe situation that a multifunctional circulating well unit is scrapped due to the fact that a biological film is formed at a circulating well screen pipe and the circulating well screen pipe is blocked is avoided. A wedge-shaped collector is arranged at the bottom of a circulating well water inlet screen pipe, and DNAPLs in underground water can be collected.
Owner:ZHONGKE DINGSHI ENVIRONMENTAL ENG CO LTD
Underground water level monitoring and early warning system
PendingCN114323203AImprove stabilityIncrease altitude dataBatteries circuit arrangementsElectric powerEarly warning systemWater level
The invention provides an underground water level monitoring and early warning system, a detection system is divided into a wellhead part and an underground part, a non-contact water level sensor, a pressure sensor and a liquid specific gravity sensor are installed on the underground part, the underground part freely moves under the dragging of a right-angle worm direct-current gear motor and a cable, and a liquid specific gravity sensor is installed on the underground part. The water surface position in an underground water detection well is comprehensively judged through the pressure sensor and the non-contact liquid level sensor, meanwhile, the length of a cable between the underground part and the wellhead part at the moment is judged through the absolute encoder, and the water level information of deep underground water is comprehensively calculated in combination with elevation data in the Beidou system. And the accuracy of detection data is improved. And the water level information is sent to a server through the 4G data transmission module or the Beidou short message module, so that a data center can inquire and monitor the water level information.
Owner:新疆维吾尔自治区水资源中心
Visual measurement device for underground water level under negative pressure condition and measurement method
ActiveCN104316144ASimple structureEasy to operateLevel indicators by floatsMeasurement deviceWater level
The invention discloses a visual measurement device for an underground water level under a negative pressure condition. The device comprises a permeable pipe, a floating block, pulleys, a high-definition camera with a light source, a wire, a fixed wire connector, an indicator pin, a top cover, a bottom cover, external display equipment and soil engineering filter cloth. The invention discloses a measurement method of the device. The floating block drives the high-definition camera with the light source to freely change the up-down displacement with the float of the underground water level; during each measurement, the external display equipment on the outer side of the permeable pipe is connected with the high-definition camera through the wire, and a scale position indicated by the indicator pin in the pipe is photographed, so that the underground water level under the negative pressure condition can be obtained. The real underground water level under the negative pressure condition can be accurately measured, and the error of the conventional open measurement is avoided; the device has the advantages of simple structure, easiness in manufacturing, low cost, convenience in use and broad application prospect.
Owner:HOHAI UNIV
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