Construction device and construction method for dewatering and drainage of deep foundation pit

Abstract

The invention discloses a construction device and a construction method for dewatering and drainage of a deep foundation pit, and relates to the technical field of dewatering and drainage of deep foundation pits. Filtering modules are uniformly distributed in the precipitation wells, the filtering modules are used for filtering and collecting gravel in the precipitation wells, the filtering modules are connected with water pumping modules, and the water pumping modules are used for pumping filtered water out of the precipitation wells; when water pumping is conducted on the dewatering well, firstly, gravel is filtered and collected through the filtering module, secondly, filtered water is pumped out of the dewatering well through the water pumping module, and compared with the prior art, the gravel can be collected while being filtered, so that the situation that the gravel is adsorbed again when the water pumping module pumps water is avoided, and the water pumping efficiency is improved. And the effect of effectively isolating gravel is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit drainage, and in particular to a construction device and a construction method for deep foundation pit drainage. Background Art

[0002] The foundation pit pipe well combined with the light well point dewatering system is a comprehensive dewatering solution. It uses two different types of well structures to effectively control the groundwater level inside and outside the foundation pit. During construction, multiple light well points are generally set up around the foundation pit. First, the outer pipe is inserted into the ground and filled with gravel around the outer pipe. There are generally more holes on the outer pipe, so that the groundwater in the soil enters the outer pipe. After the water level rises, the groundwater is extracted through the inner pipe set in the outer pipe. Since there is a lot of sand and gravel near the shallow underground water, the groundwater entering the outer pipe will have larger sand and gravel. When the pump extracts groundwater through the inner pipe, sand and gravel enter the pump and cause damage to the pump. For this reason, a filter is generally set at the bottom of the inner pipe, but the filter is easily blocked by sand and gravel, so that the precipitation cannot be effectively continued, and the filter needs to be cleaned manually regularly.

[0003] In the prior art, for example, a patent document with the publication number CN118774156B discloses a water conservancy project foundation pit pipe well combined with a light well point drainage structure and a drainage method, and also discloses filtering sand and gravel through a first filter screen. After the first filter screen is blocked, the first filter screen is driven to move by a control component, so that the first filter screen changes the volume of the blocking chamber, and the first filter screen is self-cleaned by squeezing the water flow through the first filter screen.

[0004] In actual application, although the existing technology can clean the sand and gravel attached to the filter by self-cleaning, since the water pump is operating normally and continuously generates negative pressure, the sand and gravel separated from the filter can be easily adsorbed on the filter again. The existing technology cannot effectively isolate these sand and gravel. When the amount of sand and gravel accumulates too much, it will affect the normal water inlet of the outer pipe. Summary of the invention

[0005] The purpose of the present invention is to provide a construction device and a construction method for deep foundation pit drainage to solve the following technical problems: After the sand and gravel on the filter screen are cleaned by the prior art in a self-cleaning manner, the sand and gravel will be adsorbed on the filter screen again under the continuous negative pressure of the water pump, and complete cleaning cannot be achieved.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A construction device for drainage of deep foundation pits, comprising a plurality of drainage wells opened on both sides of the foundation pit; Each of the precipitation wells is provided with a filter module, which includes a filter column, on which a plurality of sedimentation cavities are arranged in a circumferential array, and in which a scraper for scraping off sand and gravel is arranged, and a drainage cavity is provided at the bottom of the filter column; The filter module is connected to the pumping module, and the pumping module includes a drainage pipe fixedly arranged in the drainage cavity to pump out the filtered water from the precipitation well.

[0007] Preferably, a water inlet is provided on the sedimentation chamber, a first sealing plate is provided on the water inlet, the first sealing plate is connected to the first lifting part, a water outlet is provided at the bottom of the sedimentation chamber, a second sealing plate is provided at the water outlet, and the second sealing plate is connected to the second lifting part; The drainage chamber is connected with the sedimentation chamber through the water outlet.

[0008] Preferably, a limiting frame corresponding to the sedimentation cavity is fixedly arranged on the outer edge surface of the filter column, a discharge groove connected to the sedimentation cavity is opened at the bottom of the limiting frame, a baffle is slidably embedded in the discharge groove, the baffle is connected to the first elastic part arranged in the groove wall of the discharge groove, and the baffle is slidably fitted with the groove wall of the discharge groove; Among them, the deposition chamber is provided with a groove on one side close to the axial direction of the filter column, a scraper is slidably embedded in the groove, the scraper is slidably fitted with the groove wall and the second sealing plate, the top of the scraper is vertically fixed on the top plate, and a pushing part is provided in the filter column, which is used to drive the scraper to slide in the deposition chamber.

[0009] Preferably, a storage box is fixedly arranged at the bottom end of the limit frame, a feed port is opened at the top of the storage box, a third sealing plate is slidably arranged on the feed port, and limit rods slidably plugged with the limit frame are fixedly arranged at both ends of the third sealing plate, and a first spring is provided on the limit rods.

[0010] Preferably, slide grooves are provided on the groove walls on both sides of the discharge groove, a guide groove is further provided on the side of the slide groove close to the baffle plate, a through groove is provided on the side of the guide groove close to the baffle plate, a guide plate is slidably arranged in the slide groove and the guide groove, and the guide plate is fixed to the baffle plate through the through groove via a connecting plate; Wherein, a sleeve is fixedly arranged in the slide groove, a second spring is fixedly arranged in the sleeve, and the other end of the second spring is fixed to the guide plate through a telescopic rod.

[0011] Preferably, a partition fixed to the guide plate is slidably arranged in the guide groove, and the partition is located on a side of the guide plate close to the sleeve; Wherein, the partition plate is slidably fitted with the groove wall of the guide groove.

[0012] Preferably, the groove and the corresponding positions on the discharge chute are provided with reserved grooves, and the pushing part comprises a screw rod rotatably arranged in the reserved grooves on both sides, and a nut fixed to the top plate is spirally sleeved on the screw rod; One end of each screw extends into the circular groove, and a gear is fixedly arranged at the end of the screw; a rack for meshing with the gear is correspondingly fixedly arranged on the outer side of the water pipe.

[0013] Preferably, the bottom of the drain pipe is provided with a plurality of groups of drainage holes in a circumferential array; Among them, a circular groove is opened at the axial end of the filter column, and a water pipe slidably plugged with the drainage pipe is arranged at the axial end of the circular groove. Main water pipes are arranged on both sides of the foundation pit, and the ends of the water pipes away from the filter column are slidably plugged with branch water pipes, and each branch water pipe is connected to the main water pipe. Water pumps are also arranged on both sides of the foundation pit, and the water pumps are connected to the main water pipes.

[0014] Preferably, each of the first sealing plates is fixed to the first positioning ring through an L-shaped bracket, each of the second sealing plates is fixed to the second positioning ring, the first lifting part includes a first push plate fixedly arranged on the water pipe, the second lifting part includes a second push plate fixedly arranged on the water pipe, the filter column is provided with a second elastic part, and the first sealing plate and the second sealing plate are respectively connected to the second elastic part; The top of each water pipe is fixed by a connecting frame, and lifting cylinders are arranged on both sides of the foundation pit, and the driving end of the lifting cylinder is fixed to the connecting frame.

[0015] A construction method for deep foundation pit drainage, using the above-mentioned construction device for deep foundation pit drainage, comprises the following steps: Set up multiple drainage wells around the foundation pit; Place the filter column in the precipitation well, and at the same time, connect the water pipe to the water pump through the branch pipe and the main water pipe; The lifting cylinder drives the water pipe to rise, and the water pipe drives the first positioning ring to rise through the first push plate. The first positioning ring drives the first sealing plate to separate from the water inlet through the L-shaped bracket, and the water in the precipitation well enters the sedimentation chamber; After the water is inletted, the lifting cylinder drives the water pipe to descend a certain distance, and the second elastic part drives the first sealing plate to reset and seal the water inlet under the action of elastic force; The sand and gravel deposited at the bottom of the sedimentation chamber are scraped off by a scraper; The lifting cylinder drives the water pipe to further descend. During the descent of the water pipe, the second positioning ring is pushed down a certain distance by the second push plate. The second positioning ring drives the second sealing plate to separate from the water outlet, and the water in the sedimentation chamber is discharged into the drainage chamber. Start the water pump, which will pump water out of the drainage pipe through the water supply pipe, branch water pipe and main water pipe in turn.

[0016] Beneficial effects of the present invention: (1) When the present invention is pumping water from the precipitation well, the sand and gravel are first filtered and collected by the filtering module, and then the filtered water is pumped out of the precipitation well by the pumping module. Compared with the prior art, the present invention can collect the sand and gravel while filtering the sand and gravel, so as to avoid the pumping module adsorbing the sand and gravel again when pumping water, thereby achieving the effect of effectively isolating the sand and gravel; (2) In the present invention, when the water in the sedimentation chamber is full, the water inlet is closed by the first sealing plate, and the water outlet is closed by the second sealing plate. After a period of sedimentation, the sand and gravel contained in the water will be deposited on the second sealing plate under the action of gravity. The present invention can push the scraper to move in a direction away from the axis of the filter column through the pushing part. During the movement, the scraper will scrape the sand and gravel deposited on the second sealing plate in the direction of the baffle. As the scraper moves, the baffle can be pushed to move toward the outside of the discharge trough synchronously, thereby scraping out the sand and gravel between the baffle and the scraper. At this time, the first elastic part stretches to generate elastic force. Since the baffle and the scraper are both slidably fitted with the trough wall of the discharge trough, during the scraping process, the water in the sedimentation chamber will not leak from the baffle and the gap between the scraper and the discharge trough. After the discharge is completed, the scraper is driven to return to its original position by the pushing part, and the first elastic part can synchronously drive the baffle to return to its original position, so as to facilitate scraping again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the construction structure of a construction device for deep foundation pit drainage according to the present invention; Figure 2 It is a schematic diagram of the construction cutaway structure of a construction device for deep foundation pit drainage according to the present invention; Figure 3 It is a structural schematic diagram of a filter column in a construction device for deep foundation pit drainage according to the present invention; Figure 4 It is a structural schematic diagram of a material storage box in a construction device for deep foundation pit drainage according to the present invention; Figure 5 It is a schematic diagram of the cross-section structure of a filter column in a construction device for deep foundation pit drainage according to the present invention; Figure 6 The present invention Figure 5 The structural diagram of the enlarged part at A in the middle; Figure 7 It is a structural schematic diagram of a chute in a construction device for deep foundation pit drainage according to the present invention; Figure 8 The present invention Figure 7 The structural diagram of the enlarged part at B in the middle; Fig. 9 It is a structural schematic diagram of a baffle in a construction device for deep foundation pit drainage according to the present invention; Fig.10 It is a structural schematic diagram of a construction device for deep foundation pit drainage when the water inlet is opened in the present invention; Fig.11 It is a schematic structural diagram of a construction device for deep foundation pit drainage when water is stored in a sedimentation cavity of the present invention; Fig.12 It is a structural schematic diagram of a construction device for deep foundation pit drainage in the present invention when a scraper is scraping materials; Fig.13 It is a structural schematic diagram of a construction device for deep foundation pit drainage when the water outlet is opened; Fig.14 The present invention is a schematic structural diagram of a water pipe in a construction device for deep foundation pit drainage.

[0019] In the figure: 1, foundation pit; 2, water pump; 3, filter module; 4, storage box; 5, first sealing plate; 6, sedimentation chamber; 7, baffle; 101, precipitation well; 201, main water pipe; 202, branch water pipe; 203, connecting frame; 204, lifting cylinder; 205, water pipe; 301, filter column; 302, limit frame; 303, discharge trough; 304, slide; 305, round groove; 306, drainage chamber; 307, drainage pipe; 308, drainage hole; 401, cover plate; 402, third sealing plate; 403, limit rod; 404, first spring; 405, feed port; 406, drainage hole; 501 , guide seat; 502, guide rod; 503, third spring; 504, L-shaped bracket; 505, first positioning ring; 506, first push plate; 507, second push plate; 508, rack; 509, second positioning ring; 601, water inlet; 602, water outlet; 603, second sealing plate; 604, groove; 605, scraper; 606, top plate; 607, reserved groove; 608, screw; 609, nut; 610, gear; 701, baffle; 702, guide groove; 703, through groove; 704, partition; 705, guide plate; 706, sleeve; 707, telescopic rod; 708, second spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] See also Figure 1-Figure 2As shown, the present invention is a construction device for deep foundation pit drainage, including a plurality of groups of drainage wells 101 opened on both sides of the foundation pit 1; specifically, each group of drainage wells 101 is arranged in an intermittent manner on both sides of the foundation pit 1, and the spacing between two adjacent groups of drainage wells 101 is set accordingly based on the drainage demand, wherein the depth of the drainage well 101 is higher than the depth of the foundation pit 1, ensuring that groundwater can effectively penetrate and gather in the drainage well 101 under the action of gravity, and during drainage, ensuring that the groundwater level in the drainage well 101 is always lower than the horizontal line at the bottom of the foundation pit 1, thereby avoiding the problem of groundwater infiltrating into the foundation pit 1.

[0023] In this embodiment, each precipitation well 101 is evenly provided with a filter module 3, and the filter module 3 is used to filter and collect sand and gravel in the precipitation well 101. The filter module 3 includes a filter column 301, and a plurality of groups of sedimentation chambers 6 are arranged in a circumferential array on the filter column 301. The sedimentation chamber 6 is provided with a scraper 605 for scraping off sand and gravel, and a drainage chamber 306 is provided at the bottom of the filter column 301; the filter module 3 is connected to a pumping module, and the pumping module is used to extract the filtered water from the precipitation well 101. The pumping module includes a drainage pipe 307 fixedly arranged in the drainage chamber 306, so as to extract the filtered water from the precipitation well 101; It should be noted that, in this embodiment, when pumping water from the precipitation well 101, the sand and gravel are first filtered and collected by the filter module 3, and then the filtered water is pumped out of the precipitation well 101 by the pumping module. Compared with the prior art, this embodiment can collect sand and gravel while filtering them, so as to avoid the pumping module adsorbing sand and gravel again when pumping water, thereby achieving the effect of effectively isolating sand and gravel.

[0024] Example 2

[0025] Based on Example 1, please refer to Figure 3 and Figure 5 , a water inlet 601 is provided on the sedimentation chamber 6, a first sealing plate 5 is provided on the water inlet 601, the first sealing plate 5 is connected to the first lifting part, and is used to adjust whether the water inlet 601 is opened or closed, a water outlet 602 is provided at the bottom of the sedimentation chamber 6, a second sealing plate 603 is provided at the water outlet 602, and the second sealing plate 603 is connected to the second lifting part, and is used to adjust whether the water outlet 602 is opened or closed, wherein the drainage chamber 306 is connected to the sedimentation chamber 6 through the water outlet 602; it can be explained that, in the initial state, the first lifting part adjusts the first sealing plate 5 to close the water inlet 601, and the second lifting part adjusts the second sealing plate 603 to close the water outlet 602, and when pumping water, the first lifting part adjusts the first sealing plate 5 to rise to be separated from the water inlet 601 (see Fig.10), at this time, the water in the precipitation well 101 can be input into the sedimentation chamber 6 through the water inlet 601 under the action of gravity. When the water in the sedimentation chamber 6 is full, the first lifting part adjusts the first sealing plate 5 to return to its original position and closes the water inlet 601 (see Fig.11 ), secondly, the second lifting part adjusts the second sealing plate 603 to descend and separate from the water outlet 602, and the water in the sedimentation chamber 6 can be discharged into the drainage chamber 306 through the water outlet 602 under the action of gravity, and finally pumped out through the pumping module, and so on and so forth, to achieve the effect of continuous pumping.

[0026] In addition, in this embodiment, three groups of sedimentation chambers 6 are arranged in a circumferential array. This implementation does not limit the specific number of arrangements, as long as the actual pumping volume requirement is met.

[0027] In this embodiment, please refer to Figure 5-Figure 6 , a limiting frame 302 corresponding to the deposition chamber 6 is fixedly arranged on the outer edge surface of the filter column 301, a discharge groove 303 connected to the deposition chamber 6 is provided at the bottom of the limiting frame 302, a baffle 7 is slidably embedded in the discharge groove 303, the baffle 7 is connected to the first elastic part arranged in the groove wall of the discharge groove 303, the baffle 7 is slidably fitted with the groove wall of the discharge groove 303, wherein a groove 604 is provided on the side of the deposition chamber 6 close to the axial direction of the filter column 301, a scraper 605 is slidably embedded in the groove 604, the scraper 605 is slidably fitted with the groove wall of the groove 604 and the second sealing plate 603, and a pushing part is provided in the filter column 301, and the pushing part is used to drive the scraper 605 to slide in the deposition chamber 6; it can be explained that, please refer to Figure 11-Figure 12 When the water in the sedimentation chamber 6 is full, the water inlet 601 is closed by the first sealing plate 5, and the water outlet 602 is closed by the second sealing plate 603. After a period of sedimentation, the sand and gravel contained in the water will be deposited on the second sealing plate 603 under the action of gravity. In this embodiment, the scraper 605 can be pushed by the pushing part to move in the direction away from the axis of the filter column 301. During the movement, the scraper 605 scrapes the sand and gravel deposited on the second sealing plate 603 in the direction of the baffle 7. With the movement of the scraper 605, the baffle 7 can be synchronously pushed to move toward the outside of the discharge trough 303, thereby scraping out the sand and gravel between the baffle 7 and the scraper 605 (please refer to Fig.12 ), at this time, the first elastic part is stretched to generate elastic force, because the baffle plate 7 and the scraper plate 605 are slidingly fitted with the groove wall of the discharge groove 303, during the scraping process, the water in the deposition chamber 6 will not leak from the gap between the baffle plate 7 and the scraper plate 605 and the discharge groove 303. After the discharge is completed, the scraper plate 605 is driven to reset by the pushing part, and the first elastic part can synchronously drive the baffle plate 7 to reset, so as to facilitate scraping again.

[0028] As a further solution of this embodiment, please refer to Figure 4-Figure 5, a material storage box 4 is fixedly arranged at the bottom end of the limit frame 302, a feed port 405 is opened at the top of the material storage box 4, a third sealing plate 402 is slidably arranged on the feed port 405, and a limit rod 403 slidably plugged with the limit frame 302 is fixedly arranged at both ends of the third sealing plate 402, and a first spring 404 is arranged on the limit rod 403; specifically, one end of the first spring 404 is fixed to the limit frame 302, and the other end is fixed to both sides of the third sealing plate 402; it can be explained that When the scraper 605 synchronously drives the baffle 7 to move away from the axis of the filter column 301, the baffle 7 can synchronously push the third sealing plate 402 to deviate in the direction away from the axis, so that the feed port 405 is opened, and the sand and gravel scraped by the scraper 605 can fall into the storage box 4 through the feed port 405 under the action of gravity for collection. At this time, the first spring 404 is stretched to generate elastic force. When the scraper 605 is reset, the first spring 404 can synchronously drive the third sealing plate 402 to reset.

[0029] In addition, see Figure 4 A cover plate 401 is embedded on one side of the storage box 4 away from the axis of the filter column 301, and the cover plate 401 is fixed to the storage box 4 by bolts; specifically, the particle size of the sand and gravel particles that can be adsorbed is usually small, so the volume of the storage box 4 can meet the collection of sand and gravel during one pumping process. When the pumping is completed, the filter module 3 is taken out of the precipitation well 101, and the cover plate 401 can be opened to take out the sand and gravel stored in the storage box 4, which is very convenient to operate.

[0030] See also Fig.11 When scraping the material, some water will also enter the storage box 4. In order to drain the water in the storage box 4, in this embodiment, at least one group of drainage holes 406 connected to the drainage chamber 306 is opened on the side of the storage box 4 close to the axis of the filter column 301, and a one-way valve limited to draining water to the drainage chamber 306 is provided in the drainage hole 406; specifically, the drainage hole 406 and the bottom of the drainage chamber 306 must have a certain height difference. When a certain amount of water in the drainage chamber 306 is pumped out and the water level in the storage box 4 is high, the water in the storage box 4 can be discharged into the drainage chamber 306 through the drainage hole 406.

[0031] See also Figure 6 , a top plate 606 is vertically fixed at the top of the scraper 605; specifically, when the scraper 605 moves toward the baffle 7, the top plate 606 first abuts against the baffle 7, and then a scraping cavity for scraping materials can be formed between the scraper 605, the baffle 7 and the top plate 606. Sand and gravel can be temporarily stored in the scraping cavity to avoid the phenomenon that the clamping force of the scraper 605 and the baffle 7 on the sand and gravel is too large and affects the normal discharge of sand and gravel.

[0032] In this embodiment, please refer to Figure 3 , Figure 7-Figure 9, slide grooves 304 are provided on the groove walls on both sides of the discharge groove 303, and a guide groove 702 is also provided on the side of the slide groove 304 close to the baffle 7, and a through groove 703 is provided on the side of the guide groove 702 close to the baffle 7, and a guide plate 705 is slidably arranged in the slide groove 304 and the guide groove 702, and the guide plate 705 passes through the through groove 703 and is fixed to the baffle 7 through the connecting plate, wherein a sleeve 706 is fixedly arranged in the slide groove 304, and a second spring 708 is fixedly arranged in the sleeve 706, and the other end of the second spring 708 is fixed to the guide plate 705 through the telescopic rod 707; it can be explained that the baffle 7 can drive the guide plate 705 to slide in the slide groove 304 and the guide groove 702 through the connecting plate during the sliding process, and the guide plate 705 drives the second spring 708 to stretch and generate elastic force through the telescopic rod 707, so as to facilitate the subsequent driving of the guide plate 705 and the baffle 7 to reset.

[0033] As a further solution of this embodiment, as the baffle 7 moves, in order to prevent water from being discharged from the through groove 703 into the guide groove 702 and the slide groove 304, a partition 704 fixed to the guide plate 705 is slidably arranged in the guide groove 702, and the partition 704 is located on the side of the guide plate 705 close to the sleeve 706, wherein the partition 704 slides and fits with the groove wall of the guide groove 702; it can be explained that the baffle 7 can synchronously drive the partition 704 to slide in the guide groove 702 during the sliding process, thereby achieving the sealing of the through groove 703, so that water will not enter the guide groove 702 along the through groove 703, thereby effectively improving the sealing performance.

[0034] See also Figure 3 , Figure 5-Figure 6 In this embodiment, reserved grooves 607 are provided at corresponding positions on the groove 604 and the discharge groove 303, and the pushing part includes a screw 608 rotatably arranged in the reserved grooves 607 on both sides, and a nut 609 fixed to the top plate 606 is spirally sleeved on the screw 608; it can be explained that when driving the scraper 605 to move, the screw 608 is rotated first, and the scraper 605 can be driven to slide through the top plate 606 during the sliding process of the nut 609 on the screw 608.

[0035] In addition, a shield plate 701 is vertically fixedly arranged on the top of the baffle plate 7 to close the reserved groove 607 on the top thereof to prevent water in the deposition chamber 6 from leaking from the reserved groove 607 .

[0036] See also Figure 5 The bottom of the drain pipe 307 is provided with a plurality of groups of drain holes 308 in a circumferential array, wherein a circular groove 305 is provided at the axial end of the filter column 301, and a water delivery pipe 205 is arranged at the axial end of the circular groove 305 to be slidably plugged with the drain pipe 307, which can be referred to Figure 1-Figure 2, main water pipes 201 are arranged on both sides of the foundation pit 1, and the ends of the water pipes 205 away from the filter column 301 are slidably connected with the branch water pipes 202, and each branch water pipe 202 is connected with the main water pipe 201. Water pumps 2 are also arranged on both sides of the foundation pit 1, and the water pumps 2 are connected to the main water pipes 201; it can be explained that after the water in the sedimentation chamber 6 is discharged into the drainage chamber 306, the water can enter the drainage pipe 307 along the drain hole 308, start the water pump 2, and the water pump 2 will pump out the water in the drainage pipe 307 through the water pipe 205, the branch water pipe 202 and the main water pipe 201 in turn.

[0037] See also Figure 3 and Figure 5 as well as Fig.14 , each first sealing plate 5 is fixed to the first positioning ring 505 through an L-shaped bracket 504, each second sealing plate 603 is fixed to the second positioning ring 509, the water pipe 205 slides through the first positioning ring 505 and the second positioning ring 509, the first lifting part includes a first push plate 506 fixedly arranged on the water pipe 205, the second lifting part includes a second push plate 507 fixedly arranged on the water pipe 205, the diameter of the first push plate 506 is larger than the inner diameter of the first positioning ring 505, the diameter of the second push plate 507 is larger than the inner diameter of the second positioning ring 509, the filter column 301 is provided with a second elastic part, the first sealing plate 5 and the second sealing plate 603 are respectively connected to the second elastic part; wherein, please refer to Figure 1-Figure 2 The top of each water pipe 205 is fixed by a connecting frame 203, and lifting cylinders 204 are arranged on both sides of the foundation pit 1, and the driving end of the lifting cylinder 204 is fixed to the connecting frame 203; It can be explained that in the initial state, based on the setting of the second elastic part, the first sealing plate 5 is in a state of sealing the water inlet 601, and the second sealing plate 603 is in a state of sealing the water outlet 602. When it is necessary to adjust the first sealing plate 5 to separate from the water inlet 601, the present embodiment can drive the water pipe 205 to rise through the lifting cylinder 204, and the water pipe 205 can drive the first positioning ring 505 to rise through the first push plate 506, and the first positioning ring 505 can drive the first sealing plate 5 to separate from the water inlet 601 through the L-shaped bracket 504. After the sedimentation chamber 6 completes the water inflow, the lifting cylinder 204 drives the water pipe 205 to rise. 205 descends a certain distance, and the second elastic part can drive the first sealing plate 5 to reset and seal the water inlet 601 under the action of elastic force. After the scraper 605 completes the sand and gravel scraping, the lifting cylinder 204 drives the water pipe 205 to further descend. During the descent of the water pipe 205, the second positioning ring 509 is pushed to descend a certain distance through the second push plate 507. The second positioning ring 509 synchronously drives the second sealing plate 603 to separate from the water outlet 602 to discharge the water in the sedimentation chamber 6. The lifting cylinder 204 drives the water pipe 205 to reset, and the second elastic part can synchronously drive the second sealing plate 603 and the second positioning ring 509 to reset.

[0038] See also Figure 3 The second elastic part includes a guide rod 502 fixedly arranged on the filter column 301, and a guide seat 501 fixed to the first sealing plate 5 or the second sealing plate 603 is slidably arranged on the guide rod 502, wherein a third spring 503 is provided on the guide rod 502; specifically, one end of the third spring 503 is fixed to the guide seat 501, and the other end is fixed to the end of the guide rod 502; it can be explained that the first sealing plate 5 and the second sealing plate 603 of this embodiment can synchronously drive the guide seat 501 to slide on the guide rod 502 when moving, and then compress the third spring 503 to generate elastic force, which is used for subsequently driving the guide seat 501 to reset.

[0039] For further information, see Figure 5 and Fig.14 In order to drive the screw 608 to rotate, in this embodiment, one end of each screw 608 extends into the circular groove 305, and a gear 610 is fixedly arranged at the end of the screw 608, wherein a rack 508 for meshing with the gear 610 is correspondingly fixedly arranged on the outer side of the water pipe 205; it can be explained that after the sedimentation chamber 6 completes the water inflow, it is deposited for a period of time so that the sand and gravel fall to the bottom of the sedimentation chamber 6, and then the water pipe 205 is driven to descend by the lifting cylinder 204. During the descent, the rack 508 can automatically drive the screw 608 to rotate by meshing with the gear 610, until the scraping is completed, the rack 508 loses meshing with the gear 610, and as the water pipe 205 continues to descend, the second push plate 507 will abut against the second positioning ring 509, and accordingly, as the water pipe 205 rises, the screw 608 is driven to rotate in the opposite direction through the rack 508 and the gear 610, thereby driving the scraper 605 to reset.

[0040] A construction method for deep foundation pit drainage, comprising the following steps: See also Figure 1-Figure 2 , S1, a plurality of drainage wells 101 are arranged around the foundation pit 1; S2, placing the filter column 301 in the precipitation well 101, and at the same time, connecting the water pipe 205 to the water pump 2 through the branch water pipe 202 and the main water pipe 201; See also Figure 2-Figure 5 S3, the lifting cylinder 204 drives the water pipe 205 to rise, and the water pipe 205 drives the first positioning ring 505 to rise through the first push plate 506. The first positioning ring 505 can drive the first sealing plate 5 to separate from the water inlet 601 through the L-shaped bracket 504, and the water in the precipitation well 101 enters the sedimentation chamber 6 (see Fig.10 ); S4. After the water is inletted, the lifting cylinder 204 drives the water pipe 205 to descend a certain distance, and the second elastic part drives the first sealing plate 5 to reset and seal the water inlet 601 under the action of elastic force (see Fig.11); S5, scrape off the sand and gravel deposited at the bottom of the deposition chamber 6 by means of the scraper 605 (see Fig.12 ); S6. The lifting cylinder 204 drives the water pipe 205 to further descend. During the descent of the water pipe 205, the second positioning ring 509 is pushed down a certain distance by the second push plate 507. The second positioning ring 509 drives the second sealing plate 603 to separate from the water outlet 602, and the water in the sedimentation chamber 6 is discharged to the drainage chamber 306 (see Fig.13 ); S7, start the water pump 2, and the water pump 2 pumps the water in the drainage pipe 307 through the water delivery pipe 205, the branch water pipe 202 and the main water pipe 201 in sequence.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A construction device for dewatering a deep foundation pit, comprising a plurality of dewatering wells (101) provided on both sides of a foundation pit (1); It is characterized in that Each of the precipitation wells (101) is evenly provided with a filter module (3), the filter module (3) comprising a filter column (301), a plurality of groups of sedimentation chambers (6) are provided on the filter column (301) in a circumferential array, a scraper (605) for scraping off sand and gravel is provided in the sedimentation chamber (6), and a drainage chamber (306) is provided at the bottom of the filter column (301); The filter module (3) is connected to the pumping module, which comprises a drainage pipe (307) fixedly arranged in the drainage cavity (306) and used to pump filtered water out of the precipitation well (101).

2. A construction device for deep foundation pit drainage according to claim 1, characterized in that: The sedimentation chamber (6) is provided with a water inlet (601), the water inlet (601) is provided with a first sealing plate (5), the first sealing plate (5) is connected to the first lifting part, the bottom of the sedimentation chamber (6) is provided with a water outlet (602), the water outlet (602) is provided with a second sealing plate (603), the second sealing plate (603) is connected to the second lifting part; The drainage chamber (306) is connected to the sedimentation chamber (6) via the water outlet (602).

3. A construction device for deep foundation pit drainage according to claim 2, characterized in that: A limiting frame (302) corresponding to the sedimentation chamber (6) is fixedly arranged on the outer edge surface of the filter column (301); a discharge groove (303) communicating with the sedimentation chamber (6) is provided at the bottom of the limiting frame (302); a baffle (7) is slidably embedded in the discharge groove (303); the baffle (7) is connected to a first elastic portion arranged in the groove wall of the discharge groove (303); and the baffle (7) is slidably fitted with the groove wall of the discharge groove (303); The deposition chamber (6) is provided with a groove (604) on one side close to the axial direction of the filter column (301), a scraper (605) is slidably embedded in the groove (604), the scraper (605) is slidably fitted with the groove wall of the groove (604) and the second sealing plate (603), a top plate (606) is vertically fixedly arranged at the top of the scraper (605), and a pushing portion is provided in the filter column (301), the pushing portion is used to drive the scraper (605) to slide in the deposition chamber (6).

4. A construction device for deep foundation pit drainage according to claim 3, characterized in that: A material storage box (4) is fixedly arranged at the bottom end of the limit frame (302), a material feed port (405) is provided at the top of the material storage box (4), a third sealing plate (402) is slidably arranged on the material feed port (405), and limit rods (403) slidably plugged with the limit frame (302) are fixedly arranged at both ends of the third sealing plate (402), and a first spring (404) is provided on the limit rod (403).

5. A construction device for deep foundation pit drainage according to claim 3, characterized in that: The groove walls on both sides of the discharge groove (303) are provided with sliding grooves (304), a guide groove (702) is further provided on the side of the sliding groove (304) close to the baffle (7), a through groove (703) is provided on the side of the guide groove (702) close to the baffle (7), a guide plate (705) is slidably arranged in the sliding groove (304) and the guide groove (702), and the guide plate (705) passes through the through groove (703) and is fixed to the baffle (7) via a connecting plate; A sleeve (706) is fixedly arranged in the slide groove (304), a second spring (708) is fixedly arranged in the sleeve (706), and the other end of the second spring (708) is fixed to the guide plate (705) via a telescopic rod (707).

6. A construction device for deep foundation pit drainage according to claim 5, characterized in that: A partition plate (704) fixed to the guide plate (705) is slidably arranged in the guide groove (702), and the partition plate (704) is located on a side of the guide plate (705) close to the sleeve (706); The partition plate (704) is slidably fitted with the groove wall of the guide groove (702).

7. A construction device for deep foundation pit drainage according to claim 3, characterized in that: The groove (604) and the corresponding positions on the discharge groove (303) are provided with reserved grooves (607), and the pushing part includes a screw rod (608) rotatably arranged in the reserved grooves (607) on both sides, and a nut (609) fixed to the top plate (606) is spirally sleeved on the screw rod (608); One end of each screw rod (608) extends into the circular groove (305), and a gear (610) is fixedly arranged at the end of the screw rod (608); a rack (508) for meshing with the gear (610) is correspondingly fixedly arranged on the outer side of the water delivery pipe (205).

8. A construction device for deep foundation pit drainage according to claim 7, characterized in that: The bottom of the drainage pipe (307) is provided with a plurality of groups of drainage holes (308) in a circumferential array; The filter column (301) has a circular groove (305) at its axial end, a water pipe (205) slidably plugged into a drainage pipe (307) is arranged at the axial end of the circular groove (305), main water pipes (201) are arranged on both sides of the foundation pit (1), one end of the water pipe (205) away from the filter column (301) is slidably plugged into a branch water pipe (202), each branch water pipe (202) is connected to the main water pipe (201), and water pumps (2) are arranged on both sides of the foundation pit (1), the water pumps (2) are connected to the main water pipe (201).

9. A construction device for deep foundation pit drainage according to claim 8, characterized in that: Each of the first sealing plates (5) is fixed to the first positioning ring (505) via an L-shaped bracket (504), each of the second sealing plates (603) is fixed to the second positioning ring (509), the first lifting part comprises a first push plate (506) fixedly arranged on the water pipe (205), the second lifting part comprises a second push plate (507) fixedly arranged on the water pipe (205), a second elastic part is provided on the filter column (301), and the first sealing plate (5) and the second sealing plate (603) are respectively connected to the second elastic part; The top of each water delivery pipe (205) is fixed by a connecting frame (203), and lifting cylinders (204) are arranged on both sides of the foundation pit (1), and the driving end of the lifting cylinder (204) is fixed to the connecting frame (203).

10. A construction method for deep foundation pit drainage, using the construction device for deep foundation pit drainage according to claim 9, characterized in that: The steps include: A plurality of drainage wells (101) are arranged around the foundation pit (1); The filter column (301) is placed in the precipitation well (101), and at the same time, the water delivery pipe (205) is connected to the water pump (2) through the branch water pipe (202) and the main water pipe (201); The lifting cylinder (204) drives the water pipe (205) to rise, and the water pipe (205) drives the first positioning ring (505) to rise through the first push plate (506). The first positioning ring (505) drives the first sealing plate (5) to separate from the water inlet (601) through the L-shaped bracket (504), and the water in the precipitation well (101) enters the sedimentation chamber (6); After the water intake is completed, the lifting cylinder (204) drives the water delivery pipe (205) to descend a certain distance, and the second elastic part drives the first sealing plate (5) to reset and seal the water inlet (601) under the action of the elastic force; Scraping off the sand and gravel deposited at the bottom of the deposition chamber (6) by means of a scraper (605); The lifting cylinder (204) drives the water pipe (205) to further descend. During the descent of the water pipe (205), the second positioning ring (509) is pushed down a certain distance by the second push plate (507). The second positioning ring (509) drives the second sealing plate (603) to separate from the water outlet (602), and the water in the sedimentation chamber (6) is discharged into the drainage chamber (306). The water pump (2) is started, and the water pump (2) sequentially pumps water out of the drainage pipe (307) through the water delivery pipe (205), the branch water pipe (202), and the main water pipe (201).

Images