712 results about "Ground water level" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

The invention relates to a method and a system for prewarning drought and flood disasters of farmlands. The method comprises the following steps: arranging an electronic water gauge for measuring an underground water level and an electronic water gauge for measuring a ground water level; inputting measuring results into a collector; transmitting the measuring results to a remote prewarning system server by the collector and processing the measuring results in the remote prewarning system server; judging whether floods, floodwater and droughts are available or not according to the ground water level and the underground water level by using the prewarning system server; and prewarning possible drought and flood disasters in time so as to prepare for irrigation or drainage. According to the invention, through automatic monitoring of the electronic water gauges within 24 hours, the drought and flood disasters can be effectively and automatically monitored and controlled; and meanwhile, the technical scheme provided by the invention obtains good expansibility.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

The invention relates to a rain-induced landslide critical start-up rainfall and instability early-warning time determination method, which comprises the following steps: Step 1, determination of physical and mechanical property parameters of a slope and slope angle and slope vertical depth; Step 2, monitoring of landslide slope rainfall and monitoring data processing; Step 3, determination of landslide start-up groundwater level critical depth value; Step 4, determination of landslide start-up effective rainfall threshold; Step 5, determination of real-time critical start-up rainfall of the slope; Step 6, slope stability analysis and evaluation; and Step 7, determination of slope instability early-warning time. The invention creatively puts forward a landslide stability real-time start-up rainfall determination and slope stability evaluation method based on a limit equilibrium method and with the combination of real-time rainfall monitoring. By real-time monitoring of rainfall, slope critical start-up rainfall can be detected and determined. The method has important application prospect and value in landslide hazard monitoring early-warning and stability evaluation.

The invention provides a device and method for transmitting remote data of the water temperature of a ground water level. The device comprises field monitoring equipment, a communication interface module, a microprocessor, a transmission module, a clock module and a power unit, wherein the clock module is used for providing a clock benchmark for the device, and the power unit is used for providing power for all the working units. The power unit comprises a power supply, a normally-opened power module, an interruptable power module and a battery monitoring module unit. The power supply directly provides power for the transmission module and is connected to the normally-opened power module and the interruptable power module respectively after two times of voltage stabilization. The normally-opened power supply provides working voltage for a microcontroller, a real-time clock, a communication interface and a battery monitoring unit. The interruptable power module provides working voltage for a water level monitor, a water temperature monitor and an air pressure sensor. The battery monitoring module unit is used for monitoring the working state of the interruptable power module. The device not only can carry out real-time monitoring and remote control on the running conditions of the monitoring instrument, but also can ensure that the power supply is switched off in a non-work state to reduce power consumption to the largest degree.