15 results about "Relief well" patented technology

The utility model relates to a pressure relief construction node, belongs to the technical field of pressure relief and drainage, and particularly relates to a water diversion and pressure relief construction node for a pressure relief well connecting pipe. The well pipe is fixedly communicated with the interior of the bottom plate; and the water collecting pit is fixedly installed on one side of the bottom plate, and a water suction pump is fixedly installed in the water collecting pit. The utility model achieves the effect of very strong economic benefit and social benefit, and solves the problems that the existing pressure relief well is exposed outside the bottom plate for a long time, a large amount of underground water flows out through the pressure relief well in a flood season, water is accumulated in the basement, civilized construction is poorer, and the other part of pressure relief well is positioned on the main path of the basement construction road. And the pressure relief well is damaged due to lack of pressure relief well finished product protection measures.

The invention relates to the field of petroleum drilling engineering, in particular to an experimental device for simulating the well killing effect of a rescue well under different communication points. According to the technical scheme, a visual transparent outer shaft, an annular inner shaft, an upper plug and a lower plug form a shaft unit, a simulated rescue well, an angle sensor, a universal connector, an angle adjusting mechanism and a steel hoop form a rescue well unit, and an upper liquid outlet pipeline, a liquid storage tank, a stirrer, a screw pump and a kill fluid injection pipeline form a kill fluid injection unit. The air compressor, the pressure reducing valve, the pressure stabilizing valve, the gas flow regulator, the one-way valve and the gas inlet pipeline form a gas injection unit. The device has the beneficial effects that the simulation rescue well is connected through the universal connector and the angle adjusting mechanism, the complex flowing process of gas invasion and pressure back in a shaft can be simulated when the rescue well at different angles is killed, and the gas-liquid flowing rules of the rescue well at different angles, well killing fluid with different viscosities and at different flow speeds can be clearly observed.

The invention discloses a foundation pit anti-inrush self-flow controllable drainage pressure relief well construction method and a pressure relief well system, and belongs to the field of foundation pit anti-inrush, and the method comprises the following steps: S1, determining the number and the arrangement mode of pressure relief wells; s2, relief well system construction is conducted; S21, relief wells are arranged within the range of the foundation pit supporting structure according to the determined number and arrangement mode of the relief wells; s22, an annular drainage ditch is dug along the inner edge of the foundation pit, and the annular drainage ditch communicates with the decompression well through a drainage hose; s23, at least one water collecting well is arranged in the range of the foundation pit supporting structure, and the water collecting well communicates with the annular drainage ditch; and S3, the foundation pit is excavated in a layered mode, and in the excavation process, the wellhead elevation of the relief well is dynamically and synchronously adjusted based on the current foundation pit excavation face elevation. By the adoption of the foundation pit inrush-surge-resistant self-flowing controllable drainage pressure relief well construction method and the pressure relief well system, electric-power-free self-flowing drainage can be achieved through the formation water head difference, and precise pressure relief is achieved.

This invention discloses a construction method and system for a self-flowing controllable drainage and pressure relief well for foundation pits, belonging to the field of foundation pit anti-surge. The method includes the following steps: S1, determining the number and arrangement of pressure relief wells; S2, construction of the pressure relief well system: S21, arranging pressure relief wells within the foundation pit support structure according to the determined number and arrangement; S22, excavating a ring-shaped drainage ditch along the inner edge of the foundation pit and connecting the ring-shaped drainage ditch to the pressure relief wells using a drainage hose; S23, setting at least one water collection well within the foundation pit support structure, ensuring the water collection well is connected to the ring-shaped drainage ditch; S3, excavating the foundation pit in layers, and dynamically adjusting the wellhead elevation of the pressure relief wells based on the current foundation pit excavation surface elevation during the excavation process. Using the above-mentioned construction method and system for a self-flowing controllable drainage and pressure relief well for foundation pits, the difference in formation water head can be used to achieve gravity-flow drainage without electricity, realizing precise pressure relief.

The utility model relates to a pressure relief well belongs to pressure relief well technical field, concretely is a kind of pressure relief well with permanent pressure relief effect, including bottom plate, the bottom plate is equipped with pressure relief well, floor is poured on the bottom plate, steel plate is fixedly connected in pressure relief well, steel plate is fixedly connected with pressure relief pipe on it, ball valve is equipped on the pressure relief pipe, high-strength grouting material is equipped on the steel plate, floor is movably inserted with cover plate, four clamping grooves are set up on the floor, recess is set up in the cover plate;In the utility model, by multilayer structure design and end installation ball valve, late stage can be directly connected pipe water diversion pressure relief, realizes the long-term stable pressure relief effect, and pressure relief well position leakage can be promptly repaired, reduces floor leakage situation, by cover plate, recess, clamping plate, limit post, connecting plate, spring, rotating plate, limit slot and slot cooperation, locking cover plate, avoid irrelevant personnel to open cover plate, operate ball valve, cause danger.

This application discloses a pressure relief well and its construction method, relating to the field of anti-buoyancy technology in underground engineering. The pressure relief well is located within a drilled borehole and includes: a first wellbore located in the region corresponding to the aquitard within the borehole; a second wellbore located in the region corresponding to the aquifer within the borehole, the second wellbore being a permeable structure; a bottom plate located at the bottom of the borehole; a well shoe located at the bottom of the borehole and capable of preventing the bottom plate from floating; a first shock-absorbing support vertically located between the first and second wellbores, one end of the first shock-absorbing support connected to the first wellbore and the other end connected to the second wellbore, with a gap between the first and second wellbores to allow for vertically repositionable relative displacement; and a second shock-absorbing support laterally located between the first and second wellbores to allow for horizontally repositionable relative displacement. The above structure can improve the seismic resistance of the pressure relief well.

This invention discloses a clustered directional down-the-hole hammer drill bit for drilling large-diameter rescue wells. Further, it includes: a mounting body, multiple down-the-hole hammer units, multiple linear drive mechanisms, a monitoring mechanism, and a numerical control system. Each down-the-hole hammer unit is slidably mounted on the mounting body. The multiple down-the-hole hammer units are distributed circumferentially at intervals along the mounting body. Each linear drive mechanism is disposed on the mounting body. The output end of each linear drive mechanism drives and connects to its corresponding down-the-hole hammer unit. The monitoring mechanism is disposed on the mounting body, with its detection end facing the ground surface. The monitoring mechanism is used to detect the ground environment. The numerical control system is disposed on the mounting body, and its signals are connected to each linear drive mechanism and the monitoring mechanism. The numerical control system is used to control the operation of each linear drive mechanism based on the detection data from the monitoring mechanism, so as to adjust the working mode of each down-the-hole hammer unit according to the ground environment.

According to the intelligent pressure reduction system test simulation device for simulating tailing pond dam pore water under multiple working conditions, the dam body model is arranged in the box body, the pressure reduction well system is arranged on the dam body model, and the pore water pressure can rise under the action of vibration load or earthquake, so that the pore water pressure is pressed into the pressure reduction well; when the water pressure in the relief well is detected to exceed a threshold value, the water seepage pipe is layered, active water pumping is carried out on the relief well, then layered pressure reduction is carried out on underground water, and accidents caused by instability of the dam body are prevented. A water seepage pipe is driven into a tailing pond dam, the lower end of the water seepage pipe is arranged below a seepage line, a plurality of outer water seepage holes are formed in the water seepage pipe, a water pressure sensor is installed at the bottom of the water seepage pipe, a plurality of water seepage nets are vertically arranged in the water seepage pipe at intervals, and water pumps are installed below each water seepage net and above the water seepage net at the uppermost end. A vibration motor, a detection sensor and a rainfall simulation system are arranged on the experiment box to simulate various parameters of the reservoir dam.

According to the safe and intelligent pressure reduction system for the vertical pressure reduction well of the tailing pond dam, the pressure reduction well system is arranged, and when the water pressure in the pond dam rises under the action of vibration loads or earthquakes and the water pressure in the pressure reduction well exceeds a threshold value, part of water enters the pressure reduction well. Active water pumping is carried out through the layered water seepage pipe, so that layered pressure reduction is carried out on underground water, and accidents caused by liquefaction instability of the tailing pond dam body due to the too high seepage line are prevented. According to the technical scheme, an external water seepage pipe is driven into a tailing pond dam, the lower end of the external water seepage pipe is arranged below a seepage line, a plurality of external water seepage holes are formed in the external water seepage pipe, a water pressure sensor is installed at the bottom of the external water seepage pipe, and a plurality of water seepage nets are vertically arranged in the external water seepage pipe at intervals; water pumps are installed below each water seepage net and above the water seepage net at the uppermost end, the water pumps are communicated to the outside of the water seepage pipe through drainage pipes, and the water pumps and the pressure reduction sensors are connected into an electric control box arranged outside the water seepage pipe.

The invention discloses a confined water foundation pit underground water control method and device and electronic equipment, and relates to the field of foundation pit engineering safety or other related technical fields, and the method comprises the steps: analyzing the distribution characteristics of a rock-soil layer and the type of underground water, and measuring and calculating the confined water pressure of a foundation pit; based on the pressure of the confined water, checking calculation analysis is conducted on the bottom of the pit collapsed by the confined water, the overburden layer elevation is obtained, and the overburden layer elevation is used for determining the excavation limiting elevation where measures need to be taken to prevent piping; carrying out seepage stability analysis on the basis of the elevation of the overburden layer, determining the position and the bottom elevation of a water cut-off curtain, and generating a water cut-off curtain scheme; a finite element software model is adopted to calculate the seepage flow of the foundation pit, a pressure relief well is arranged according to the calculation result of the seepage flow of the foundation pit and the conditions of the foundation pit, and the pressure relief well is utilized to discharge and flatten confined water. The technical problem that in the prior art, when underground water control cannot be conducted in foundation pit engineering, pressure relief well design is conducted in a trial-and-error mode, and efficiency is low is solved.

This invention relates to the field of municipal drainage technology, and more particularly to a pressure relief well and a water flow energy dissipation method. The pressure relief well includes an inlet pipe and an energy dissipation and anti-scour device; the outlet of the inlet pipe is located at the bottom of the well and faces upwards, and the anti-scour device is located at the outlet of the inlet pipe; the energy dissipation and anti-scour device includes an energy dissipation basin and an energy dissipation ring, the energy dissipation ring protruding upwards from the bottom of the well and surrounding the energy dissipation basin; the energy dissipation basin includes grid bars and at least two energy dissipation discs, the grid bars being arranged between the energy dissipation discs and between the energy dissipation discs and the bottom of the well, the diameter of the upper energy dissipation disc being larger than the diameter of the lower energy dissipation disc, and each energy dissipation disc having an energy dissipation hole. This invention solves the problem of water flow impact on drainage wells and extends the service life of drainage wells.

The application discloses a foundation protection method on a karst underground river in a low-lying area around a reservoir, and the method can reduce the pressure head of the karst confined water in the field area, reduce the floating force of the clay layer on the top of the karst underground river, and avoid the damage of the foundation caused by the sudden gushing of the karst underground river; when the reservoir water level suddenly drops, the underground water level in the karst underground river system suddenly drops, and at this time, a part of the karst cave under the foundation is in a vacuum state, causing the engineering geological problems of ground karst collapse and uneven settlement of the foundation; at this time, the air supplied through the pressure relief well can solve the above engineering geological problems.

The invention provides an active pressure relief and drainage system under a cushion layer based on the negative pressure principle. A solution is provided for improvement of traditional pressure relief well construction and arrangement in the aspects of universality, construction and maintenance convenience, building structure integrity guarantee and the like. Through the arrangement of the extensible debugging structure of the drainage network system, the design requirement and the trouble that a plurality of pressure relief wells are arranged in the necessary area range and the size in the prior art are avoided, and the drainage network system is more suitable for various building structure forms. The drainage network system is laid on the lower portion of the cushion layer and can be perfectly matched with the type of the cushion layer, and deformation of the cushion layer and an upper bottom plate caused by too high underground water pressure is avoided. The design position of the pressure relief well is more flexible, and the pressure relief well can be arranged outdoors or inside an independent working area facilitating follow-up drainage operation. Digging and hole reserving do not need to be conducted on the bottom plate and the cushion layer, and damage to the integrity of the building structure caused by arrangement of the pressure relief well is reduced.

The utility model relates to a well sealing structure of a foundation pit pressure relief well, which comprises a dewatering well, a well sealing layer group and a construction assembly, the dewatering well is positioned in a foundation pit, and the well sealing layer group is arranged in the dewatering well. The well sealing layer set is composed of a gravel concrete mixing layer, a first micro-expansive concrete layer, prefabricated concrete columns, a second micro-expansive concrete layer, a steel plate with round holes and a third micro-expansive concrete layer. The gravel concrete mixing layer, the first micro-expansive concrete layer, the prefabricated concrete column, the second micro-expansive concrete layer, the steel plate with the round holes and the third micro-expansive concrete layer are sequentially filled from bottom to top, the construction assembly comprises a foundation pit bottom cushion layer and a triangular support, and the foundation pit bottom cushion layer is located on the outer side of the top of the dewatering well; the precast concrete column is adopted, the slurry solidification time is shortened, the safety in the well sealing process is also ensured, and multi-section sealing is adopted in the construction process, so that the anti-seepage performance of well sealing can be greatly enhanced.

The invention discloses a relief well and a construction method, and relates to the technical field of anti-floating of underground engineering, the relief well is arranged in a drilled well hole, and the relief well comprises a first shaft, a second shaft, a third shaft and a fourth shaft, the second shaft is arranged in the area, corresponding to the aquifer, in the well hole, and the second shaft is of a permeable structure; the bottom plate is arranged at the bottom of the well hole; the well shoe is arranged at the bottom of the well hole and can limit floating of the bottom plate; the first damping support is vertically arranged between the first shaft and the second shaft, one end of the first damping support is connected to the first shaft, the other end of the first damping support is connected to the second shaft, and a gap is formed between the first shaft and the second shaft, so that the first shaft and the second shaft can relatively move in a resettable mode in the vertical direction; and the second damping support is transversely arranged between the first shaft and the second shaft, so that the first shaft and the second shaft can relatively displace in the horizontal direction in a resettable manner. The structure can improve the shock resistance of the relief well.