Intelligent drainage anti-collapse support construction system for deep foundation pit

Abstract

The invention discloses an intelligent drainage anti-collapse support construction system for a deep foundation pit, and relates to the technical field of foundation pit construction, the intelligent drainage anti-collapse support construction system comprises a first support baffle and a second support baffle, the first support baffle and the second support baffle are hinged and fixed through a positioning clamping mechanism, and a support bottom plate is hinged to the end, away from the second support baffle, of the first support baffle; through the hinged design of the first supporting baffle, the second supporting baffle and the supporting bottom plate, the adjustable inclined struts and the multi-point anchoring design are combined to enhance the overall stability of supporting, so that the whole supporting structure is firm and stable in use and can be folded and stored when not in use, transportation and on-site carrying are greatly facilitated, and the construction cost is reduced. The water storage cavity integrated in the second supporting baffle, the liquid level sensor and the drainage pump form an intelligent drainage system, automatic drainage is achieved through the rotatable double-arc-shaped filter screen plate and the liquid level sensor, uninterrupted operation of drainage operation and convenient cleaning of the filter screen are achieved, blockage is effectively prevented, and the drainage efficiency and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of foundation pit construction technology, and in particular to an intelligent drainage and anti-collapse support construction system for deep foundation pits. Background Technology

[0002] An excavation pit is a temporary pit created during building construction to excavate the foundation. It is a crucial preliminary step in underground engineering construction and is widely used in construction, municipal engineering, and transportation. Deep excavations typically refer to pits with an excavation depth of ≥5 meters, or those less than 5 meters but surrounded by important buildings, underground pipelines, soft soil layers, or other complex conditions. Their construction is greatly affected by soil characteristics, groundwater, and the surrounding environment, resulting in significantly higher risks of collapse and leakage compared to ordinary excavations. During building excavation construction, to ensure safety and prevent collapse accidents, support measures must be taken for the excavated pit, including supporting the pit sidewalls. Deep excavation support is the core structure for ensuring construction safety, used to resist soil pressure, control slope deformation, and block groundwater. Common forms include sheet piles, cast-in-place piles, and diaphragm walls.

[0003] Based on existing technology, traditional deep foundation pit support structures are often bulky, inconvenient to transport and install, and the support and drainage systems are mostly separate, resulting in poor coordination. Furthermore, the filters in the drainage system are easily clogged by silt, requiring drainage operations to be interrupted during cleaning and maintenance, which not only affects drainage efficiency but also poses a safety hazard of excessive water accumulation in the foundation pit. Therefore, this invention proposes an intelligent drainage and anti-collapse support construction system for deep foundation pits to solve the problems existing in the prior art. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to propose an intelligent drainage and anti-collapse support construction system for deep foundation pits, which solves the problems that traditional deep foundation pit support is not easy to fold and store, and that the filter screen in the drainage system is easily clogged by mud and sand, requiring the interruption of drainage operations during cleaning and maintenance.

[0005] To achieve the objectives of this invention, the following technical solution is provided: a deep foundation pit intelligent drainage and anti-collapse support construction system, comprising a first support baffle and a second support baffle, the first and second support baffles being hinged together and fixed by a positioning and locking mechanism, a supporting base plate being hinged to the end of the first support baffle away from the second support baffle, a storage groove being provided on the supporting base plate, and threaded telescopic rods being hinged to both sides of the storage groove via universal hinges, the end of the threaded telescopic rod away from the universal hinge being rotatably connected to a positioning cone. The first and second support baffles are both provided with equidistant positioning grooves that fit the positioning cone on the side near the threaded telescopic rod. The second support baffle has a water storage chamber inside. On the side of the second support baffle away from the positioning groove, there are water collection pipes that communicate with the water storage chamber at equal intervals. The top of the water collection pipe has a seepage groove. The inside of the water collection pipe is symmetrically provided with arc-shaped filter plates that are driven to rotate by a motor. The water storage chamber is provided with a liquid level sensor. The lower part of the second support baffle near the positioning groove is connected to a drain pump that is electrically connected to the liquid level sensor.

[0006] A further improvement is that: a partition plate located between the two sets of arc-shaped filter plates is rotatably connected inside the water collection tube; a first sprocket is fixedly sleeved at the output end of the motor; and a second sprocket, which is connected to the first sprocket, is fixedly sleeved on the side of the partition plate located outside the water collection tube.

[0007] A further improvement is that: a rotating plate is fixed at one end of the partition inside the water collection tube, and the outer wall of the rotating plate and the inner wall of the water collection tube are rotatably connected by a bearing; and an inspection door adapted to the position of the water collection tube is hinged to the side wall of the second support baffle near the positioning groove.

[0008] A further improvement is that an indicator light is fixed to the upper part of the side wall of the second support baffle near the positioning groove, and both the indicator light and the motor are electrically connected to the liquid level sensor.

[0009] A further improvement is that the positioning and locking mechanism includes cavities symmetrically opened inside the second support baffle and spring blocks slidably disposed inside the cavities. One end of the spring block near the first support baffle is fixed with an insertion post that slides through to the outside of the second support baffle. The top of the first support baffle is provided with an insertion hole adapted to the insertion post. A limit spring is connected between the inner wall of the cavity away from the insertion post and the spring block. A toggle rod that slides through to the outside of the second support baffle is fixed to the side wall of the spring block.

[0010] A further improvement is that the threaded telescopic rod includes a threaded rod hinged to a universal joint and a threaded tube rotatably connected to a positioning cone via a bearing, wherein the threaded rod is threaded to the inside of the threaded tube.

[0011] A further improvement is that: a movable ring is connected to the side of the positioning cone near the threaded tube via a spring telescopic component, a fixed ring is sleeved on the outer wall of the threaded tube, and mutually compatible annular positioning teeth are fixed on opposite sides of the movable ring and the fixed ring.

[0012] A further improvement is that the spring telescopic component includes a sleeve fixedly connected to the positioning cone and a slide rod fixedly connected to the movable ring, and a linear spring is connected between the inner wall of the sleeve away from the movable ring and the slide rod.

[0013] Further improvements include: through holes adapted to the water collection pipe are provided on both the first support baffle and the support base plate; anchor blocks are fixed on both outer walls of the first support baffle, the second support baffle, and the support base plate; and anchor rods are passed through the anchor blocks.

[0014] The beneficial effects of this invention are as follows: This invention enhances the overall stability of the support through the hinged design of the first and second support plates and the supporting base plate, combined with adjustable diagonal bracing and multi-point anchoring design. This ensures the entire support structure is firm and stable during use and can be folded for storage when not in use, greatly facilitating transportation and on-site handling. The water storage chamber, liquid level sensor, and drainage pump integrated within the second support plate constitute an intelligent drainage system. Utilizing a rotatable double-arc filter plate and liquid level sensing for automatic drainage, it achieves uninterrupted drainage operation and convenient filter cleaning, effectively preventing blockage and improving drainage efficiency and reliability. Thus, this system integrates anti-collapse support and intelligent drainage functions into one compact structure with a high degree of automation, significantly improving the safety and operational efficiency of deep foundation pit construction. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a side sectional view of the present invention;

[0018] Figure 4 This is the invention Figure 3 Enlarged view of point A in the image;

[0019] Figure 5 This is a cross-sectional view of the water collection tube of the present invention;

[0020] Figure 6 This is a three-dimensional structural diagram of the arc-shaped filter plate of the present invention;

[0021] Figure 7 This is a front view of the movable ring and the fixed ring of the present invention;

[0022] Figure 8This is a cross-sectional view of the movable ring and the fixed ring of the present invention;

[0023] Figure 9 This is a side view of the folded storage state of the present invention.

[0024] The components include: 1. First protective baffle; 2. Second protective baffle; 3. Support base plate; 4. Storage slot; 5. Universal hinge; 6. Threaded telescopic rod; 7. Positioning cone; 8. Positioning slot; 9. Water storage chamber; 10. Water collection pipe; 11. Seepage tank; 12. Motor; 13. Arc-shaped filter screen; 14. Liquid level sensor; 15. Drain pump; 16. Partition; 17. First sprocket; 18. Second sprocket; 9. Turning plate; 20. Inspection door; 21. Indicator light; 22. Cavity; 23. Spring block; 24. Insert post; 25. Insertion hole; 26. Limit spring; 27. Actuating rod; 28. Moving ring; 29. ​​Fixed ring; 30. Annular positioning tooth; 31. Sleeve; 32. Slide rod; 33. Linear spring; 34. Through hole; 35. Anchor block; 36. Anchor rod; 601. Threaded rod; 602. Threaded tube. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown in the figure, this embodiment provides a deep foundation pit intelligent drainage and anti-collapse support construction system. The system mainly includes a first support baffle 1 and a second support baffle 2, which are connected by a hinge and can rotate around the hinge axis. The end of the first support baffle 1 away from the second support baffle 2 is connected to the support base plate 3 through another hinge. A square storage groove 4 is provided on the support base plate 3.

[0027] To facilitate folding and storage of the entire system structure, the first support baffle 1, the second support baffle 2, and the support base plate 3 in this embodiment are hinged. When storage is required, the positioning and locking mechanism is released from the positioning and fixing between the first support baffle 1 and the second support baffle 2, and then the second support baffle 2 is folded toward the first support baffle 1, and then the first support baffle 1 is folded toward the support base plate 3. Finally, most of the structure can be stored in the plane of the support base plate 3, which greatly saves transportation and storage space.

[0028] The aforementioned positioning and locking mechanism is used to fix the first support baffle 1 and the second support baffle 2 when the system is deployed, so that the first support baffle 1 and the second support baffle 2 are relatively fixed. Its specific structure is as follows: cavities 22 are symmetrically opened inside the second support baffle 2, and spring blocks 23 are slidably arranged in the cavities 22. One end of the spring block 23 is fixed with a post 24, which can slide in the cavity 22 and partially protrude from the second support baffle 2. A corresponding insertion hole 2 is opened at the top of the first support baffle 1. 5. A limiting spring 26 is provided in the cavity 22, with its two ends connected to the inner wall of the cavity 22 and the spring block 23 respectively. Under normal conditions, the limiting spring 26 pushes the spring block 23 and the insertion post 24 to move towards the insertion hole 25 to achieve automatic insertion and locking. A toggle rod 27 is fixed on the side wall of the spring block 23. The toggle rod 27 extends out from the guide groove on the side wall of the second support baffle 2. Manually pulling the toggle rod 27 upward can overcome the elastic force of the limiting spring 26 and push the insertion post 24 out of the insertion hole 25, thereby releasing the lock and facilitating folding.

[0029] To enhance the stability of the support structure after deployment, in this embodiment, universal hinges 5 are fixed on both the left and right sides inside the storage groove 4 of the support base plate 3, and an adjustable threaded telescopic rod 6 is hinged to the universal hinge 5. The threaded telescopic rod 6 includes a threaded rod 601 and a threaded tube 602. One end of the threaded rod 601 is hinged to the universal hinge 5, and the other end is screwed into the threaded tube 602. The total length of the threaded telescopic rod 6 can be adjusted by rotating the threaded tube 602. The end of the threaded tube 602 away from the threaded rod 601 is rotatably connected to a positioning cone 7 through a bearing. On the side of the first support baffle 1 and the second support baffle 2 near the threaded telescopic rod 6, multiple positioning slots 8 are equidistantly provided.

[0030] When support is needed for the first and second guard plates 1 and 2, the threaded telescopic rod 6 is removed from the storage slot 4. According to the required support angle and position, the positioning cone 7 is inserted into the positioning slot 8 at the corresponding height. The length of the threaded telescopic rod 6 is adjusted to a taut state, which can provide stable oblique support for the first and second guard plates 1 and 2. The universal hinge 5 allows the threaded telescopic rod 6 to adjust its angle within a large range so that the threaded telescopic rod 6 can be placed into the storage slot 4.

[0031] To prevent the threaded tube 602 from accidentally rotating and loosening after length adjustment, this embodiment includes a spring telescopic component on one side of the positioning cone 7. This component comprises a sleeve 31 fixed to the positioning cone 7 and a slide rod 32 fixed to the movable ring 28. The slide rod 32 extends into the sleeve 31 and is connected via a linear spring 33. The movable ring 28 can move axially under the influence of the linear spring 33 and the slide rod 32. A fixed ring 29 is fitted and fixed to the outer wall of the threaded tube 602. Interlocking annular positioning teeth 30 are respectively provided on the opposite sides of the movable ring 28 and the fixed ring 29. When the linear spring 33 is in its natural or compressed state, the annular positioning teeth 30 on the fixed ring 29 and the movable ring 28 engage with each other, locking the threaded tube 602 and preventing rotation. When length adjustment is required, the positioning cone 7 is slightly pulled out of the positioning groove 8, causing the movable ring 28 to disengage from the fixed ring 29 under spring force. At this point, the threaded tube 602 can be freely rotated for length adjustment.

[0032] Specifically, in this embodiment, the second support baffle 2 is hollow inside, forming a water storage cavity 9. On the side of the second support baffle 2 away from the positioning groove 8 (i.e. the side facing the foundation pit soil), multiple water collection pipes 10 connected to the water storage cavity 9 are fixed at equal intervals. The end of the water collection pipe 10 away from the second support baffle 2 is designed as a pointed cone. A seepage groove 11 is opened at the top of the water collection pipe 10 to collect seepage water in the foundation pit soil layer. The first support baffle 1 and the supporting base plate 3 are respectively provided with through holes 34 so that the water collection pipe 10 can pass through the first support baffle 1 and the supporting base plate 3 when folded and stored.

[0033] To prevent impurities such as mud and sand in the soil from entering the drainage system, two arc-shaped filter plates 13, which can be driven to rotate by a motor 12, are symmetrically arranged inside each water collection pipe 10. The rotation axis of the two arc-shaped filter plates 13 is set horizontally. A vertical rotating plate 19 is also rotatably connected inside the water collection pipe 10 through a bearing. A partition plate 16 is fixedly connected to the rotating plate 19 and roughly divides the cavity of the water collection pipe 10 into two parts. The two arc-shaped filter plates 13 are respectively embedded in the two cavities and fit against the inner wall of the water collection pipe 10. A second sprocket 18 is fixedly sleeved at one end of the partition plate 16 outside the water collection pipe 10. The motor 12 is fixed above the inside of the water storage chamber 9, and a first sprocket 17 is fixedly sleeved on its output shaft. The first sprocket 17 and the second sprocket 18 are connected by chain drive. When the motor 12 drives the rotating plate 19 to work, the partition plate 16 can be rotated 180 degrees through the sprocket and chain drive, thereby exchanging the working positions of the two arc-shaped filter plates 13.

[0034] When one of the arc-shaped filter plates 13 is in the working position (corresponding to the seepage tank 11, facing the direction of water flow) for filtration, the other is in the standby position (i.e. below the partition 16). When the working filter plate is clogged (the degree of clogging is judged by the amount of water filtered from the soil; the more water filtered, the more serious the clogging. When the level sensor 14 detects that the water in the water storage chamber 9 has reached the preset value, it indicates that the arc-shaped filter plate 13 may be clogged), the motor 12 can be started to rotate the clean standby arc-shaped filter plate 13 to the working position, achieving switching without stopping the machine. For easy cleaning and maintenance, an inspection door 20 is hinged to the second support baffle 2 at the position corresponding to each water collection pipe 10. After opening, the arc-shaped filter plate 13 in the non-working position can be cleaned or replaced.

[0035] In this embodiment, a liquid level sensor 14 is installed inside the water storage chamber 9 to monitor the water level. A drainage pump 15 is connected to the lower part of the side wall of the second support baffle 2. The inlet of the drainage pump 15 is connected to the bottom of the water storage chamber 9, and the outlet is connected to the drainage ditch outside the pit through a pipeline. The liquid level sensor 14 is connected to the PLC controller of the system. When the liquid level sensor 14 detects that the water level has reached a preset high value, the drainage pump 15 is automatically started to pump water. When the water level drops to a preset low value, the drainage pump 15 is automatically shut off to achieve automatic and intelligent drainage.

[0036] In addition, an indicator light 21 is fixed on the upper side wall of the second support baffle 2. The indicator light 21 and the motor 12 are both connected to the PLC controller of the system. When the liquid level sensor 14 detects that the water level has reached the preset high value (indicating that the arc-shaped filter plate 13 may be blocked), the motor 12 is automatically started to drive the baffle 16 to rotate the two sets of arc-shaped filter plates 13 and exchange positions. At the same time, the indicator light 21 is activated to remind the relevant construction personnel to replace and clean the arc-shaped filter plates 13.

[0037] In this embodiment, perforated anchor blocks 35 are welded to the outer walls of both sides of the first support baffle 1, the second support baffle 2, and the support base plate 3. During construction, anchor rods 36 (such as soil nails or anchor rods) can be driven into the anchor blocks 35 to anchor the entire support system to the side wall of the pit, thereby enhancing its overall anti-overturning and anti-slip capabilities.

[0038] During construction, the folded support system is first transported to the deep foundation pit. The first support baffle 1 and the second support baffle 2 are unfolded and fixed using the positioning and locking mechanism. The support base plate 3 is placed flat on the edge of the foundation pit or on the pre-set base. The threaded telescopic rod 6 is taken out from the storage groove 4. After adjusting the length, the positioning cone 7 is inserted into the positioning groove 8 of the corresponding height and tightened to form a diagonal brace. The anchor rod 36 is driven into the soil layer through each anchor block 35 to complete the fixation of the support structure. The water collection pipe 10 is inserted into the soil of the side wall of the foundation pit when the support structure is in place.

[0039] After the system starts working, groundwater enters the water collection pipe 10 through the seepage tank 11, is filtered by the arc-shaped filter plate 13 which is currently in the working position, and then flows into the water storage chamber 9. The liquid level sensor 14 monitors the water level in real time and controls the start and stop of the drainage pump 15 to achieve automatic drainage. When the filter needs to be cleaned, the motor 12 is started by the PLC controller to drive the baffle 16 to rotate 180 degrees, so that the blocked filter plate is turned into the maintenance position and the clean arc-shaped filter plate 13 is turned into the working position. The drainage is uninterrupted throughout the process. The replaced arc-shaped filter plate 13 can be cleaned by opening the maintenance door 20.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep foundation pit intelligent drainage and anti-collapse support construction system, comprising a first support baffle (1) and a second support baffle (2), characterized in that: The first support baffle (1) and the second support baffle (2) are hinged together and fixed by a positioning snap-fit ​​mechanism. A support base plate (3) is hinged to the end of the first support baffle (1) away from the second support baffle (2). A storage groove (4) is provided on the support base plate (3). Threaded telescopic rods (6) are hinged to both sides of the storage groove (4) through universal hinges (5). A positioning cone (7) is rotatably connected to the end of the threaded telescopic rod (6) away from the universal hinges (5). The first support baffle (1) and the second support baffle (2) are both provided with equidistant openings on the side of the threaded telescopic rod (6) that are adapted to the positioning cone (7). The positioning groove (8) is provided with a water storage chamber (9) inside the second support baffle (2). A water collection tube (10) communicating with the water storage chamber (9) is fixed at equal intervals on the side of the second support baffle (2) away from the positioning groove (8). A seepage groove (11) is provided at the top of the water collection tube (10). An arc-shaped filter plate (13) driven to rotate by a motor (12) is symmetrically provided inside the water collection tube (10). A liquid level sensor (14) is provided inside the water storage chamber (9). A drainage pump (15) electrically connected to the liquid level sensor (14) is connected to the lower part of the second support baffle (2) near the positioning groove (8).

2. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 1, characterized in that: The water collection tube (10) is rotatably connected to a partition (16) located between the two sets of arc-shaped filter plates (13). The output end of the motor (12) is fixedly sleeved with a first sprocket (17). The partition (16) is fixedly sleeved with a second sprocket (18) that is connected to the first sprocket (17) for transmission on the side outside the water collection tube (10).

3. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 2, characterized in that: The partition (16) is fixed with a rotating plate (19) at one end inside the water collection tube (10). The outer wall of the rotating plate (19) and the inner wall of the water collection tube (10) are rotatably connected by a bearing. The second support baffle (2) is hinged with an inspection door (20) that matches the position of the water collection tube (10) on one side wall near the positioning groove (8).

4. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 1, characterized in that: The second support baffle (2) has an indicator light (21) fixed on the upper part of the side wall near the positioning groove (8). The indicator light (21) and the motor (12) are both electrically connected to the liquid level sensor (14).

5. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 1, characterized in that: The positioning and locking mechanism includes a cavity (22) symmetrically opened inside the second support baffle (2) and a spring block (23) slidably disposed inside the cavity (22). The spring block (23) has a fixed insertion post (24) that slides through to the outside of the second support baffle (2) at one end near the first support baffle (1). The top of the first support baffle (1) has an insertion hole (25) that matches the insertion post (24). A limit spring (26) is connected between the inner wall of the cavity (22) away from the insertion post (24) and the spring block (23). The side wall of the spring block (23) has a toggle rod (27) that slides through to the outside of the second support baffle (2).

6. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 1, characterized in that: The threaded telescopic rod (6) includes a threaded rod (601) hinged to a universal hinge (5) and a threaded tube (602) rotatably connected to a positioning cone (7) via a bearing. The threaded rod (601) is threaded to the inside of the threaded tube (602).

7. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 6, characterized in that: The positioning cone (7) is connected to a movable ring (28) via a spring telescopic component on the side near the threaded tube (602). A fixed ring (29) is sleeved on the outer wall of the threaded tube (602). The movable ring (28) and the fixed ring (29) are respectively fixed with mutually compatible annular positioning teeth (30) on opposite sides.

8. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 7, characterized in that: The spring telescopic component includes a sleeve (31) fixedly connected to the positioning cone (7) and a slide rod (32) fixedly connected to the movable ring (28). A linear spring (33) is connected between the inner wall of the sleeve (31) away from the movable ring (28) and the slide rod (32).

9. The intelligent drainage and anti-collapse support construction system for deep foundation pits according to claim 1, characterized in that: Both the first support baffle (1) and the support base plate (3) are provided with through holes (34) adapted to the water collection pipe (10). Anchor blocks (35) are fixed on both sides of the outer walls of the first support baffle (1), the second support baffle (2) and the support base plate (3), and anchor rods (36) are passed through the anchor blocks (35).

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