A leak-stopping and grouting device between deep foundation pit retaining piles

Abstract

The application relates to the technical field of building construction, and particularly provides a leak-stopping and grouting device between deep foundation pit retaining piles, which comprises a main sealing plate and movable plates sliding on the two sides of the main sealing plate, a grouting opening is arranged on the front surface of the main sealing plate, a sealing side plate buffer assembly is connected with the movable plates, a distance adjusting assembly comprises a worm and gear mechanism, two screw rods are respectively arranged on the two sides of a worm wheel of the worm and gear mechanism and coaxially connected with a turbine, a rod sleeve is sleeved on the screw rod and threadedly connected with the screw rod, the rod sleeve is fixedly connected with the movable plate, and a plurality of bolt holes are vertically distributed on the upper and lower portions of a pressing plate. The worm and gear mechanism of the distance adjusting assembly drives the two screw rods to rotate through two connecting sleeves, simultaneously pushes the movable plates on the two sides of the main sealing plate to move and expand towards the two retaining piles, at the moment, the sealing side plates on the two sides are abutted against the retaining piles, and the worm and gear mechanism cannot drive the movable plates on the two sides to continuously expand by continuously rotating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, and in particular to a leak-stopping and grouting device between deep foundation pit support piles. BACKGROUND

[0002] Deep foundation pit construction is a very common construction method in modern civil engineering construction process. The deep foundation pit is generally several meters deep in depth, and the deep foundation pit is several tens of meters deep. In order to avoid the influence of soil collapse on the safety of pit construction and the stability of surrounding building foundation, and to avoid the concentration of underground water infiltration into the pit, the stability of the foundation pit and the safety and convenience of the work in the pit are ensured. Generally, the support treatment is needed before the deep foundation pit is excavated. The support method can be divided into gravity type mixing pile retaining wall, underground continuous wall, pile type retaining wall, etc. The pile type retaining wall is mainly composed of a wall surface composed of a plurality of support piles. The pile type retaining wall can be specifically divided into interval type bored pile, interlocking type bored pile, high pressure rotary jet pile, etc. according to the structure of the support pile. When interval type bored pile is used for deep foundation pit support, underground water leakage will inevitably occur between the interval soil layers during the deep foundation pit excavation process. In order to prevent underground water from seeping into the foundation pit, leak stopping is needed. Under the prior art, the leak stopping and grouting device is basically used to seal, that is, grouting is carried out between the two adjacent support piles. Grouting can be injecting concrete or injecting polyurethane foam material, so as to plug the water outlet.

[0003] The patent document with the publication number CN113882414A discloses a leak-stopping and grouting device between deep foundation pit support piles, which comprises a grouting chamber plate, two fixed plates and a span adjustment assembly. The two fixed plates are mirror-symmetrically slidingly assembled on the left and right sides of the grouting chamber plate. The span adjustment assembly is installed on the outer plate surface of the grouting chamber plate and is arranged between the two fixed plates. The invention improves the design of the traditional fixed plate structure leak-stopping and grouting device, solves the problems of installation inconvenience caused by the mismatch of installation size and the installation and disassembly troubles caused by the need to fix the device step by step corresponding to the drilling hole during the leak-stopping and construction of deep foundation pit support piles. However, the patent still has some deficiencies: 1. When the span adjustment assembly adjusts the distance between the two fixed plates, it cannot be determined whether the back two side edge pressing strips are pressed in place. 2. By rotating the rotating sleeve rod to make the two fixed plates move synchronously and reversely, the fixed plate on one side may be moved to the position, and the fixed plate on the other side may be difficult to continue to move to the position, so that the back two side edge pressing strips cannot be fully moved to the specified position, which may cause leakage during grouting. SUMMARY

[0004] The technical problem solved by the present application is that in order to solve the problem of slurry leakage during plugging and grouting between the enclosure piles, the present application provides a deep foundation pit enclosure pile interlayer plugging and grouting device to solve the above problems.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a deep foundation pit enclosure pile interlayer plugging and grouting device, comprising a main sealing plate, a movable plate slidingly arranged on both sides of the main sealing plate, two sealing side plates, a distance adjusting assembly and a plurality of buffer assemblies, a grouting port is formed on the front face of the main sealing plate, each sealing side plate is connected to the movable plate through a buffer assembly, the sealing side plate and the movable plate are slidingly connected, the distance adjusting assembly comprises a worm gear mechanism, two screw rods with opposite screw directions, a rod sleeve and a rod holder, the worm gear mechanism is installed on the front face of the main sealing plate, the two screw rods are respectively installed on both sides of the worm wheel of the worm gear mechanism and are coaxially connected with the turbine, the rod sleeve is correspondingly sleeved on the screw rod and is threadedly connected with the screw rod, the outer wall of the rod sleeve is fixedly connected with the movable plate through the rod holder, and one side of the sealing side plate is further fixedly provided with a pressing plate, a plurality of bolt holes are vertically distributed on the pressing plate from top to bottom.

[0006] As a preferred, the distance adjusting assembly further comprises a connecting sleeve, a spline shaft, a spline tooth, a guide disc and a thrust spring, one end of the connecting sleeve is coaxially fixed with the turbine shaft of the worm gear mechanism, the other end of the connecting sleeve is provided with a spline groove, the spline shaft is slidingly installed in the spline groove, one end of the spline shaft is fixedly connected with the screw rod, the other end of the spline shaft is fixedly connected with the spline tooth, the spline tooth can be engaged with the spline groove, the guide disc is slidingly installed in the connecting sleeve and is coaxially fixed with the spline tooth, and the two ends of the thrust spring are respectively abutted with the guide disc and the inner wall end face of the connecting sleeve.

[0007] As a preferred, the buffer assembly comprises a push rod, a sliding block, a guide rod, a buffer spring, a connecting block and a connecting plate, the push rod is vertically fixed on the top of the sealing side plate, a waist-shaped hole for accommodating the push rod is formed on the movable plate, the push rod can slide in the waist-shaped hole, the sliding block is slidingly installed in the waist-shaped hole and abuts against the push rod, one end of the guide rod is vertically fixed on the sliding block, the other end of the guide rod passes through the connecting block and is slidingly connected with the connecting block, the buffer spring is fixed between the sliding block and the connecting block, the connecting block is fixed on the connecting plate, and the end portion of the connecting plate is slidingly installed on the movable plate.

[0008] As a preferred, the middle part of the connecting plate is fixedly provided with a limiting plate, and the limiting plate can abut against the rod holder.

[0009] As preferred, the back of the sealing side plate is fixed with an arc-shaped plate, and the arc-shaped plate is fixed with a sealing gasket.

[0010] As preferred, the length of the spline shaft is greater than the length of the spline groove.

[0011] As preferred, the length of the spline tooth is less than the length of the spline groove.

[0012] As preferred, the top of the main sealing plate is fixed with a clamping block, and the bottom of the main sealing plate is provided with a clamping groove.

[0013] The beneficial effect of the present application is that the distance adjusting assembly is provided, the worm gear mechanism of the distance adjusting assembly drives two screw rods to rotate through two connecting sleeves, and simultaneously pushes the movable plates on both sides of the main sealing plate to move and expand towards the two side enclosure piles, when the sealing side plate on one side movable plate is tightly contacted with the enclosure pile, the screw rod on the side is automatically unlocked with the connecting sleeve, and the movable plate cannot be continuously pushed to move, while the connecting sleeve and the screw rod on the other side still remain in the meshing state, and the movable plate on the other side can be continuously pushed to move, until the sealing side plate on the other side is also tightly contacted with the enclosure pile, the connecting sleeve on the other side is automatically unlocked with the screw rod on the other side, at this time, the sealing side plates on both sides are tightly contacted with the enclosure pile, and the worm gear mechanism cannot drive the movable plates on both sides to continuously expand. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application is further illustrated below in combination with the drawings and examples.

[0015] Figure 1 is the structural schematic diagram of the optimal embodiment of the leakage stopping and grouting device between the deep foundation pit enclosure piles of the present application;

[0016] Figure 2 is the state diagram of the pole frame of the leakage stopping and grouting device between the deep foundation pit enclosure piles of the present application when the pole frame is not in contact with the limiting plate;

[0017] Figure 3 is the state diagram of the pole frame of the leakage stopping and grouting device between the deep foundation pit enclosure piles of the present application after the pole frame is in contact with the limiting plate;

[0018] Figure 4 is the structural schematic diagram of the screw rod and the rod sleeve of the leakage stopping and grouting device between the deep foundation pit enclosure piles of the present application;

[0019] Figure 5 is the structural schematic diagram of the spline tooth and the spline shaft of the leakage stopping and grouting device between the deep foundation pit enclosure piles of the present application;

[0020] Figure 6 is the structural schematic diagram of the sealing side plate of the leakage stopping and grouting device between the deep foundation pit enclosure piles of the present application;

[0021] Figure 7It is a structure diagram of a buffer assembly of a leakage stopping and grouting device between deep foundation pit support piles.

[0022] The figure mark: 1, main sealing plate, 2, movable plate, 3, sealing side plate, 4, distance adjusting assembly, 5, buffer assembly, 6, grouting port, 7, worm gear mechanism, 8, screw rod, 9, rod sleeve, 10, rod frame, 11, pressing plate, 12, bolt hole, 13, connecting sleeve, 14, spline shaft, 15, spline tooth, 16, guide disc, 17, thrust spring, 18, spline groove, 19, push rod, 20, sliding block, 21, guide rod, 22, buffer spring, 23, connecting block, 24, connecting plate, 25, waist type hole, 26, limiting plate, 27, sealing gasket, 28, clamping block. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and cannot be understood as a limitation of the present application.

[0024] As Figures 1 to 7 shown, the present application provides an embodiment of a leakage stopping and grouting device between deep foundation pit support piles, comprising a main sealing plate 1, movable plates 2 slidingly arranged on both sides of the main sealing plate 1, two sealing side plates 3, a distance adjusting assembly 4 and a plurality of buffer assemblies 5, the front surface of the main sealing plate 1 is provided with a grouting port 6, each sealing side plate 3 is connected to the movable plate 2 through a buffer assembly 5, and the sealing side plate 3 is slidingly connected to the movable plate 2. When performing leakage stopping and grouting between deep foundation pit support piles, first, the main sealing plate 1 is placed at a position close to the middle of the two support piles, then the two movable plates 2 are moved to the two sides of the main sealing plate 1 through the distance adjusting assembly 4, until the sealing side plates 3 on the movable plates 2 are tightly abutted against the side walls of the support piles, then the sealing side plates 3 are fixed on the support piles, the back surfaces of the main sealing plate 1, the movable plates 2 and the sealing side plates 3 are all fixed with vertical plates, when the sealing side plates 3 are fixed, the vertical plates on the back surfaces of the main sealing plate 1, the movable plates 2 and the sealing side plates 3 are all inserted into the soil layer to form a sealed chamber, the back surface of the sealing side plate 3 is fixed with an arc-shaped plate, the shape of the arc-shaped plate enables it to tightly fit the support pile, thereby expanding the contact area of the sealing side plate 3 with the support pile and helping the sealing side plate 3 to be fixed more firmly, the arc-shaped plate is fixed with a sealing gasket 27, thereby improving the sealing effect between the sealing side plate 3 and the support pile, then grouting is performed through the grouting port 6 to the back surface of the main sealing plate 1 (i.e. into the sealed chamber), thereby achieving leakage stopping.

[0025] The distance adjusting assembly 4 comprises a worm gear mechanism 7, two screw rods 8 with opposite screw directions, a rod sleeve 9 and a rod frame 10. The worm gear mechanism 7 is installed on the front surface of the main sealing plate 1. The two screw rods 8 are respectively installed on the two sides of the worm wheel of the worm gear mechanism 7 and are coaxially connected with the worm wheel. The rod sleeve 9 is sleeved on the screw rod 8 one by one and is threadedly connected with the screw rod 8. The outer wall of the rod sleeve 9 is fixedly connected with the movable plate 2 through the rod frame 10. Rotating the worm of the worm gear mechanism 7 drives the worm wheel to rotate, the worm wheel drives the screw rod 8 to rotate, the screw rod 8 rotates to drive the rod sleeve 9 to move, the rod sleeve 9 drives the rod frame 10 and the movable plate 2 to move, and then the movable plate 2 can be unfolded to the two sides of the main sealing plate 1 until the sealing side plate 3 on the movable plate 2 abuts against the enclosure pile. One side of the sealing side plate 3 is further fixed with a pressing plate 11. A plurality of bolt holes 12 are vertically distributed on the pressing plate 11 from top to bottom. When the sealing side plate 3 abuts against the enclosure pile, the bolt passes through the bolt hole 12 and is fixed on the enclosure pile, so that the pressing plate 11 can be pressed and fixed on the enclosure pile.

[0026] The distance adjusting assembly 4 further comprises a connecting sleeve 13, a spline shaft 14, a spline tooth 15, a guide disc 16 and a thrust spring 17. One end of the connecting sleeve 13 is coaxially fixed with the worm wheel shaft of the worm gear mechanism 7. The other end of the connecting sleeve 13 is provided with a spline groove 18. One end of the spline shaft 14 is fixedly connected with the screw rod 8. The other end of the spline shaft 14 is fixedly connected with the spline tooth 15. The spline tooth 15 can be engaged with the spline groove 18. The length of the spline tooth 15 is less than the length of the spline groove 18, so as to ensure that the spline tooth 15 can completely enter the spline groove 18 and be engaged with the spline groove 18. The spline shaft 14 is slidingly installed in the spline groove 18. The length of the spline shaft 14 is greater than the length of the spline groove 18, so as to ensure that the spline shaft 14 can drive the spline tooth 15 to enter or disengage from the spline groove 18 during the sliding process. The guide disc 16 is slidingly installed in the connecting sleeve 13 and is coaxially fixed with the spline tooth 15. The two ends of the thrust spring 17 respectively abut against the guide disc 16 and the inner wall end face of the connecting sleeve 13.

[0027] The working principle of the distance adjusting assembly 4 is as follows: in the initial state, the push spring 17 provides elastic force to push the guide disc 16 and the spline tooth 15, thereby pressing the spline tooth 15 into the spline groove 18 on the connecting sleeve 13, so that the spline tooth 15 is in engagement with the spline groove 18, so that the connecting sleeve 13 can drive the spline tooth 15 and the spline shaft 14 to rotate. When it is needed to unfold the movable plate 2, first, the connecting sleeve 13 is driven to rotate by the worm gear mechanism 7, the connecting sleeve 13 drives the spline shaft 14 to rotate by engagement with the spline tooth 15, the spline shaft 14 drives the screw rod 8 fixedly connected thereto to rotate, the screw rod 8 drives the rod sleeve 9 connected therewith to extend outward, thereby pushing the movable plate 2 outward by the rod sleeve 9 until the sealing side plate 3 on the movable plate 2 abuts against the support pile, so that the rod sleeve 9 cannot continue to push the movable plate 2 to move, at this time, the screw rod 8 continues to rotate while the rod sleeve 9 cannot continue to move, so that under the interaction force, the screw rod 8 is pushed to move reversely by the rod sleeve 9, the screw rod 8 pushes the spline shaft 14 to slide towards the connecting sleeve 13, the spline shaft 14 drives the spline tooth 15 to gradually slide out of the spline groove 18, and finally the spline tooth 15 is disengaged from the spline groove 18 on the connecting sleeve 13, so that even if the worm gear mechanism 7 continues to rotate, it can only drive the connecting sleeve 13 to rotate idly, and cannot drive the spline shaft 14 and the screw rod 8 to rotate, at this time, the push spring 17 is compressed, and the push spring 17 provides axial thrust for the spline shaft 14 and the screw rod 8, so that the sealing side plate 3 can abut against the support pile. When it is needed to retract the movable plate 2, the worm gear mechanism 7 is reversely rotated, the spline tooth 15, the spline shaft 14 and the screw rod 8 are reversely rotated by the friction force between the spline tooth 15 and the side wall of the spline groove 18, when the screw rod 8 reversely rotates by a certain angle, it can be retracted into the rod sleeve 9, and the spline shaft 14 is slid by inertia, thereby making the spline tooth 15 re-enter the spline groove 18 and engage with the spline groove 18, and then the worm gear mechanism 7 is continuously rotated, so that the connecting sleeve 13 drives the spline shaft 14 and the screw rod 8 to rotate, and the rod sleeve 9 and the movable plate 2 are retracted.

[0028] That is, the worm gear mechanism 7 drives the two screw rods 8 to rotate through the two connecting sleeves 13, and simultaneously pushes the movable plates 2 on both sides of the main sealing plate 1 to move and unfold towards the two support piles, when the sealing side plate 3 on one side of the movable plate 2 abuts against the support pile, the screw rod 8 on this side is automatically unlocked from the connecting sleeve 13, and cannot continue to push the movable plate 2 to move, while the connecting sleeve 13 and the screw rod 8 on the other side remain in engagement, and can continue to push the movable plate 2 on the other side to move, until the sealing side plate 3 on the other side also abuts against the support pile, the connecting sleeve 13 on the other side is automatically unlocked from the screw rod 8 on the other side, at this time, the sealing side plates 3 on both sides abut against the support piles, and the worm gear mechanism 7 cannot continue to drive the movable plates 2 on both sides to unfold.

[0029] The buffer assembly 5 comprises a push rod 19, a sliding block 20, a guide rod 21, a buffer spring 22, a connecting block 23 and a connecting plate 24, the push rod 19 is vertically fixed at the top of the sealing side plate 3, a waist-shaped hole 25 for accommodating the push rod 19 is formed in the movable plate 2, the push rod 19 can slide in the waist-shaped hole 25, the sliding block 20 is slidingly installed in the waist-shaped hole 25 and abuts against the push rod 19, one end of the guide rod 21 is vertically fixed on the sliding block 20, the other end of the guide rod 21 passes through the connecting block 23 and is slidingly connected with the connecting block 23, the buffer spring 22 is fixed between the sliding block 20 and the connecting block 23, the connecting block 23 is fixed on the connecting plate 24, the end of the connecting plate 24 is slidingly installed on the movable plate 2, the middle of the connecting plate 24 is fixed with a limiting plate 26, and the limiting plate 26 can abut against the rod frame 10.

[0030] The principle of the buffer assembly 5 is that when the sealing side plate 3 and the sealing gasket 27 abut against the enclosure pile, the sealing side plate 3 cannot continue to move, and thus the push rod 19 fixedly connected with the sealing side plate 3 cannot move, the movable plate 2 and the rod frame 10 are continuously pushed by the rod sleeve 9 to the enclosure pile, the rod frame 10 abuts against the limiting plate 26 on the connecting plate 24 and pushes the connecting plate 24 to move, the connecting plate 24 drives the connecting block 23 to move towards the sliding block 20, the sliding block 20 abuts against the push rod 19 and cannot move, and thus the buffer spring 22 is compressed, and the impact force generated when the sealing side plate 3 contacts the enclosure pile is buffered through the deformation of the buffer spring 22.

[0031] The top of the main sealing plate 1 is fixed with a clamping block 28, and the bottom of the main sealing plate 1 is provided with a clamping groove, when the leakage points in the deep foundation pit are long, a plurality of leakage stopping and grouting devices are connected in a stacked mode, and the clamping block 28 and the clamping groove are inserted and matched to achieve grouting and leakage stopping of the multiple leakage points in the deep foundation pit.

[0032] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application.

Claims

1. A grouting device for sealing leaks between retaining piles in a deep foundation pit, characterized in that: The system includes a main sealing plate (1), movable plates (2) slidably disposed on both sides of the main sealing plate (1), two sealing side plates (3), a distance adjustment assembly (4), and multiple buffer assemblies (5). The main sealing plate (1) has a grouting port (6) on its front side. Each sealing side plate (3) is connected to the movable plate (2) through a buffer assembly (5). The sealing side plate (3) is slidably connected to the movable plate (2). The distance adjustment assembly (4) includes a worm gear mechanism (7), two screws (8) with opposite thread directions, a rod sleeve (9), and a rod frame (10). The worm gear mechanism (7) is installed on the front of the main sealing plate (1). The two screws (8) are respectively installed on both sides of the worm wheel of the worm gear mechanism (7) and coaxially connected with the worm wheel. The sleeves (9) are fitted on the screws (8) one by one and threadedly connected to the screws (8). The outer wall of the sleeves (9) is fixedly connected to the movable plate (2) through the rod frame (10). A pressure plate (11) is also fixed on one side of the sealing side plate (3). Multiple bolt holes (12) are vertically distributed from top to bottom on the pressure plate (11). The distance adjustment assembly (4) further includes a connecting sleeve (13), a spline shaft (14), a spline tooth (15), a guide plate (16), and a thrust spring (17). One end of the connecting sleeve (13) is coaxially fixed with the worm gear shaft of the worm gear mechanism (7). The other end of the connecting sleeve (13) is provided with a spline groove (18). The spline shaft (14) is slidably installed in the spline groove (18). One end of the spline shaft (14) is fixedly connected to the screw (8). The other end of the spline shaft (14) is fixedly connected to the spline tooth (15). The spline tooth (15) can mesh with the spline groove (18). The guide plate (16) is slidably installed in the connecting sleeve (13) and coaxially fixed with the spline tooth (15). The two ends of the thrust spring (17) abut against the inner wall end face of the guide plate (16) and the connecting sleeve (13), respectively. The buffer assembly (5) includes a push rod (19), a slider (20), a guide rod (21), a buffer spring (22), a connecting block (23), and a connecting plate (24). The push rod (19) is vertically fixed to the top of the sealing side plate (3). The movable plate (2) has an oblong hole (25) for accommodating the push rod (19). The push rod (19) can slide along the oblong hole (25). The slider (20) is slidably installed in the oblong hole (25) and abuts against the push rod (19). One end of the guide rod (21) is vertically fixed to the slider (20). The other end of the guide rod (21) passes through the connecting block (23) and is slidably connected to the connecting block (23). The buffer spring (22) is fixed between the slider (20) and the connecting block (23). The connecting block (23) is fixed to the connecting plate (24). The end of the connecting plate (24) is slidably installed on the movable plate (2).

2. The grouting device for sealing leaks between retaining piles in a deep foundation pit as described in claim 1, characterized in that: A limiting plate (26) is fixed in the middle of the connecting plate (24), and the limiting plate (26) can abut against the rod frame (10).

3. The grouting device for sealing leaks between retaining piles in a deep foundation pit as described in claim 1, characterized in that: An arc-shaped plate is fixed to the back of the sealing side plate (3), and a sealing gasket (27) is fixed to the arc-shaped plate.

4. The grouting device for sealing leaks between retaining piles in a deep foundation pit as described in claim 1, characterized in that: The length of the spline shaft (14) is greater than the length of the spline groove (18).

5. The grouting device for sealing leaks between retaining piles in a deep foundation pit as described in claim 4, characterized in that: The length of the spline tooth (15) is less than the length of the spline groove (18).

6. The grouting device for sealing leaks between retaining piles in a deep foundation pit as described in claim 1, characterized in that: The top of the main sealing plate (1) is fixed with a card block (28), and the bottom of the main sealing plate (1) is provided with a card slot.

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