CN115162335B - Deep foundation pit supporting structure - Google Patents

Description

Deep foundation pit supporting structure

Technical field

The present invention relates to the technical field of steel sheet piles, and more specifically, the present invention relates to deep foundation pit supporting structures.

Background technique

A deep foundation pit refers to a project where the excavation depth exceeds 5 meters (including 5 meters), or a project where the depth does not exceed 5 meters, but the geological conditions, surrounding environment and underground pipelines are particularly complex. The foundation pit project is a project excavated downward from the ground. In underground spaces, vertical retaining enclosure structures are generally set up around deep foundation pits. The enclosure structure is generally a plate (pile) wall structure with a certain insertion depth under the foundation of the excavation surface; the plate (pile) wall can be cantilevered or single. Support type and multi-support type. The support structure is to reduce the deformation of the enclosure structure and control the bending moment of the wall. It is divided into two types: internal support and external anchor. U-shaped steel sheet piles are often used in my country's underground railway construction. Their settlement and The removal method and the machinery used are the same as those of I-beam piles, but their construction methods can be divided into single-layer steel sheet pile cofferdams, double-layer steel sheet pile cofferdams and screens, etc. Since the foundation pit is deep during subway construction, in order to ensure its verticality and facilitate construction, and to enable it to be closed and closed, curtain-type structures are often used.

U-shaped steel sheet piles are usually hoisted by a crane, and then the U-shaped steel sheet piles are lifted to the pile insertion point, and the U-shaped steel sheet piles are inserted with the help of a static pressure pile machine, because the U-shaped steel sheet piles must be in the correct shape when inserting the piles. Vertical state, so the single-point lifting method is used. This method makes one end of the U-shaped steel sheet pile when it is just lifted, and the other lower end is prone to friction and collision with the ground, resulting in the U-shaped steel sheet pile. Deformation requires personnel to reshape and correct the deformed parts of the U-shaped steel sheet piles, making it impossible to insert the piles smoothly, which results in a slow construction process that is time-consuming and labor-intensive. Therefore, we need to solve this problem in time.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, embodiments of the present invention provide a deep foundation pit support structure. The load-bearing block is dragged back through the winding of the connecting rope, so that the corresponding oil storage tank moves accordingly, and the sliding sleeve is pushed to slide on the surface of the reinforced cable. , causing the crane cable to follow the movable support arm. When the crane cable moves, the stress point of the reinforced cable changes, causing one end of the U-shaped steel sheet pile to tilt due to gravity inertia, so that the U-shaped steel sheet pile transforms into a vertical state to solve the problems raised in the above background art.

In order to achieve the above object, the present invention provides the following technical solution: a deep foundation pit supporting structure includes a U-shaped steel sheet pile, a round hole is opened at one end of the U-shaped steel sheet pile, and a movable limit column is provided on the inside of the round hole. , a rubber sealing ring is provided on the outside of the movable limit column, a first plywood is fixedly installed on the outside of the rubber sealing ring, a second plywood is fixedly installed on one side of the first plywood, and the second plywood is fixedly installed on one side of the rubber sealing ring. A chassis is fixedly installed on one side. A forward and reverse motor is provided on the inside of the chassis. The output end of the forward and reverse motor is rotatably connected to a gear. The outer side of the gear is meshed with a toothed drum. The toothed drum is engaged with the gear. A connecting rope is wound around the outside of the rotating drum. One end of the connecting rope is fixedly connected to a load-bearing block. A corresponding oil storage tank is fixedly installed on one side of the load-bearing block. The top of the corresponding oil storage tank is fixedly installed with a limited space. Covering box, the top of the limit covering box is fixedly installed with a first ring, the inside of the first ring is sleeved with a first lock, and one end of the first lock is fixedly connected with a reinforced Cable, one end of the reinforced cable is fixedly connected with a second lock, the inner side of the second lock is sleeved with a second ring, and one side of the limit coating box is fixedly installed with a circular limit seat, a telescopic rod is inserted into the interior of the circular limit seat, and a movable support arm is fixedly installed at one end of the telescopic rod. A metal splint is inserted into the top of the movable support arm, and one side of the metal splint A sliding sleeve is engaged, the outer side of the sliding sleeve is fixedly connected to a third circular ring, and the inner side of the third circular ring is sleeved with a crane cable.

The beneficial effect of adopting the above further solution is: use an electric drill to dig out a round hole for the U-shaped steel sheet pile, clamp the first and second plywood on both sides of the U-shaped steel sheet pile, and then insert the movable limit column into the first plywood. Inside, use a rubber sealing ring to fix the movable limit column, then snap the corresponding oil storage tank into the other end of the U-shaped steel sheet pile, and slide the sliding sleeve to the center of the reinforced cable so that both ends of the U-shaped steel sheet pile Keep it steady, then open the metal splint and snap it on the outside of the sliding sleeve. Connect the crane cable to the outside of the third ring. When the crane starts lifting, lift the U-shaped steel sheet pile as a whole. When it is completely off the ground, the forward and reverse motor is started to rotate the gear, thereby driving the toothed drum to rotate, causing the connecting rope to be rolled up. When the connecting rope is being rolled up, the load-bearing block is dragged back, making the corresponding oil storage tank Follow the movement, thereby driving the movable support arm to move, pushing the sliding sleeve to slide on the surface of the reinforced cable, causing the crane cable to follow the movable support arm. When the crane cable moves, the stress point of the reinforced cable changes, causing One end of the U-shaped steel sheet pile is tilted due to gravity inertia, so that the U-shaped steel sheet pile transforms into a vertical state in the air. The telescopic rod retracts when it contacts one side of the first splint, thereby reducing the floor space and making the corresponding type The oil storage tank can be as close as possible to the first plywood, so that the U-shaped steel sheet pile can become vertical. When the U-shaped steel sheet pile becomes vertical, the U-shaped steel sheet pile is fixed and limited through the movable limit column to prevent the U-shaped steel sheet pile from being The steel sheet pile fell off.

In a preferred embodiment, a transverse support rod is inserted into the interior of the load-bearing block, and wheels are rotatably connected to both ends of the transverse support rod.

The beneficial effect of adopting the above further solution is that when the connecting rope is being rolled up, the wheels roll on the surface of the U-shaped steel sheet pile, allowing the corresponding oil storage tank to move more smoothly.

In a preferred embodiment, a spherical seat is fixedly installed in the inner cavity of the corresponding oil storage tank, and balls are rotatably connected to the inside of the spherical seat.

The beneficial effect of adopting the above further solution is that during the movement of the corresponding oil storage tank, the balls roll on the surface of the U-shaped steel sheet pile, thereby applying the lubricating oil in the inner cavity of the corresponding oil storage tank to the surface of the U-shaped steel sheet pile.

In a preferred embodiment, the number of the spherical seats and the balls is multiple, and the plurality of the spherical seats and the balls are arranged sequentially in a path array about the outside of the U-shaped steel sheet pile.

The beneficial effect of adopting the above further solution is that through the arrangement of multiple spherical seats and balls, the lubricating oil can be applied more evenly on the surface of the U-shaped steel sheet pile.

In a preferred embodiment, a counterweight is placed inside the limited coating box, a threaded frame is fixedly installed on the top of the corresponding oil storage tank, and a threaded cover is threadedly connected to the inside of the threaded frame.

The beneficial effect of adopting the above further solution is that by unscrewing the threaded cap, the lubricating oil is poured into the inner cavity of the corresponding oil storage tank from the threaded frame, and then the threaded cap is tightened, thereby sealing the lubricating oil in the corresponding type of oil storage tank. Inside the oil storage tank.

In a preferred embodiment, a circular limiting cylinder is fixedly installed on one side of the second splint, a fourth circular ring is fixedly installed on the bottom end of the movable limiting column, and the outer side of the fourth circular ring The sleeve is connected with nylon rope.

The beneficial effect of adopting the above further solution is: when the U-shaped steel sheet pile is in a vertical state, the U-shaped steel sheet pile is fixed by a static pressure pile machine, and the staff grabs the nylon rope on the ground and drags it backward to limit the movement. The column is dragged out of the round hole so that the movable limit column and the U-shaped steel sheet pile no longer fit together. Then the crane is lifted and the device is dragged out.

In a preferred embodiment, the metal splint is made of plastic material, the metal splint and the sliding sleeve are arranged in a clamping shape, and the sliding sleeve and the reinforced cable are arranged in a sliding connection shape.

The beneficial effect of adopting the above further solution is that the sliding sleeve is clamped by the metal splint, so that when the connecting rope is rolled up, it drives the movable support arm to move, thereby driving the sliding sleeve to slide on the outside of the reinforced cable.

Technical effects and advantages of the present invention:

1. When the crane lifts the U-shaped steel sheet pile as a whole, when the U-shaped steel sheet pile completely leaves the ground, the forward and reverse motors are started to rotate the gear, thereby driving the toothed drum to rotate, causing the connecting rope to wind up. When the connecting rope is being rolled up, the load-bearing block is dragged back, causing the corresponding oil storage tank to move. When the load-bearing block moves, it drives the wheels to rotate on the surface of the U-shaped steel sheet pile, and also causes the movable support arm to push and slide when it moves. The sleeve slides on the surface of the reinforced cable, causing the crane cable to follow the movable support arm. When the crane cable moves, the stress point of the reinforced cable changes, causing one end of the U-shaped steel sheet pile to tilt due to gravity inertia, and the U-shaped steel sheet pile tilts. The steel sheet pile is transformed into a vertical state in the air, thereby avoiding the collision and deformation of the U-shaped steel sheet pile by single-point lifting, and making the U-shaped steel sheet pile transform into a vertical state in the air, which facilitates the operation of the static pressure pile machine, thus improving Improve stability and convenience;

2. When the connecting rope is rolled up, it drives the corresponding oil storage tank to move on the surface of the U-shaped steel sheet pile, and the balls roll on the surface of the U-shaped steel sheet pile, thereby applying the lubricating oil in the inner cavity of the corresponding oil storage tank to the surface of the U-shaped steel sheet pile. The surface makes the static pressure pile driver more smoothly when inserting U-shaped steel sheet piles into the ground, thus improving convenience.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Figure 2 is a structural cross-sectional view of the present invention.

Figure 3 is an enlarged view of the structure of part A in Figure 2 of the present invention.

Figure 4 is an enlarged view of the structure of part B in Figure 2 of the present invention.

Figure 5 is a structural cross-sectional view of the corresponding oil storage tank of the present invention.

Fig. 6 is an enlarged view of the structure of part C in Fig. 5 of the present invention.

Figure 7 is a structural cross-sectional view of the chassis of the present invention.

The reference numbers are: 1. U-shaped steel sheet pile; 2. Round hole; 3. Movable limit column; 4. Rubber sealing ring; 5. First plywood; 6. Second plywood; 7. Chassis; 8. Front and back. Rotating motor; 9. Gear; 10. Toothed rotating drum; 11. Connecting rope; 12. Bearing block; 13. Corresponding oil storage tank; 14. Limiting coating box; 15. First ring; 16. No. One lock; 17, reinforced cable; 18, second lock; 19, second ring; 20, circular limit seat; 21, telescopic rod; 22, movable support arm; 23, sliding sleeve; 24, The third ring; 25. Crane cable; 26. Horizontal support rod; 27. Wheel; 28. Spherical seat; 29. Ball; 30. Counterweight; 31. Threaded frame; 32. Threaded cover; 33. Circle 34. Fourth ring; 35. Nylon rope; 36. Metal splint.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Embodiment 1: The deep foundation pit support structure, as shown in Figure 1, includes a U-shaped steel sheet pile 1. As shown in Figure 3, a round hole 2 is opened at one end of the U-shaped steel sheet pile 1, and a round hole 2 is provided on the inside of the round hole 2. The movable limit column 3 is plugged into the round hole 2 through the movable limit column 3, and plays a role in fixing the U-shaped steel sheet pile 1. There is a rubber seal 4 on the outside of the movable limit column 3. Through the rubber With the setting of the sealing ring 4, when the movable limiting post 3 is inserted into the inner cavity of the first splint 5, the rubber sealing ring 4 is squeezed, and the rubber sealing ring 4 wraps and limits the movable limiting post 3 through its own resilience. It plays a role in limiting the position of the movable limit column 3 and preventing the movable limit column 3 from slipping. A first plywood 5 is fixedly installed on the outside of the rubber sealing ring 4, and a second plywood 6 is fixedly installed on one side of the first plywood 5. , the first plywood 5 and the second plywood 6 are attached to both sides of the U-shaped steel sheet pile 1, so that when the U-shaped steel sheet pile 1 is hoisted, it plays a stable role in supporting the U-shaped steel sheet pile 1. The second A chassis 7 for fixed positioning is fixedly installed on one side of the plywood 6. As shown in Figure 7, a forward and reverse motor 8 is provided on the inside of the chassis 7. The forward and reverse three-phase asynchronous motor YPZ4508- can be used as the forward and reverse motor 8. 6 model, the output end of the forward and reverse motor 8 is connected to a gear 9, the outer side of the gear 9 is meshed with a toothed drum 10, the outer side of the toothed drum 10 is wound with a connecting rope 11, and the gear 9 is connected to the belt. The toothed drum 10 is meshed. When the forward and reverse motor 8 is started, the gear 9 is driven to rotate, thereby driving the toothed drum 10 to rotate, so that the connecting rope 11 can be stretched and tightened, as shown in Figure 4. One end of the connecting rope 11 is fixedly connected with a load-bearing block 12. The load-bearing block 12 fits with the bottom of the U-shaped steel sheet pile 1, thereby stably supporting the U-shaped steel sheet pile 1. One side of the load-bearing block 12 is fixedly installed with The corresponding oil storage tank 13 is clamped on the outside of the U-shaped steel sheet pile 1 through the corresponding oil storage tank 13, and plays a role of limiting support for the U-shaped steel sheet pile 1. The top of the corresponding oil storage tank 13 is fixedly installed with a fixed limiter. The limit coating box 14 has a first ring 15 fixedly installed on the top of the limit coating box 14. As shown in Figure 2, the inner side of the first ring 15 is sleeved for fixing with the first ring 15. The first lock 16 has a reinforced cable 17 fixedly connected to one end of the first lock 16, a second lock 18 fixedly connected to one end of the reinforced cable 17, and a second round socket 18 is connected to the inner side of the second lock 18. Ring 19, as shown in Figure 4, a circular limit seat 20 is fixedly installed on one side of the limit covering box 14, and a telescopic rod 21 is inserted into the interior of the circular limit seat 20. Through the circular limit seat 20 It plays the role of limiting support for the telescopic rod 21 to prevent the telescopic rod 21 from falling off. As shown in Figure 2, one end of the telescopic rod 21 is fixedly installed with a movable support arm 22. As shown in Figure 1, the top end of the movable support arm 22 is inserted into A metal splint 36 is connected, and a sliding sleeve 23 is connected to one side of the metal splint 36. The metal splint 36 is made of plastic material, and the metal splint 36 and the sliding sleeve 23 are arranged in a clamping and snap-fitting manner. The sliding sleeve 23 and the reinforced cable 17 are arranged in a clamping shape. It is arranged in a sliding connection shape, and the sliding sleeve 23 is clamped by the metal splint 36, so that when the connecting rope 11 is rolled up, it drives the movable support arm 22 to move, thereby driving the sliding sleeve 23 to slide on the outside of the reinforced cable 17, and the outside of the sliding sleeve 23 is fixed A third ring 24 is connected, and a crane cable 25 is connected to the inner side of the third ring 24. The crane cable 25 is fixed to the third ring 24, so that the U-shaped steel sheet pile 1 is lifted, and the load-bearing block 12 is A horizontal support rod 26 is inserted inside, and both ends of the horizontal support rod 26 are rotationally connected to wheels 27. Through the setting of the wheels 27, when the connecting rope 11 is being rolled up, the U-shaped steel sheet pile 1 is connected through the wheels 27. The surface rolls, allowing the corresponding oil storage tank 13 to move more smoothly.

Regarding the above technical solution, it should be noted that when this device is actually used, the U-shaped steel sheet pile 1 is dug out with an electric drill to drill a round hole 2, and the first plywood 5 and the second plywood 6 are clamped on both sides of the U-shaped steel sheet pile 1. side, then insert the movable limit column 3 into the first plywood 5, use the rubber seal 4 to fix the movable limit column 3, and then snap the corresponding oil storage tank 13 into the other end of the U-shaped steel sheet pile 1, and slide the Slide the sleeve 23 to the center of the reinforced cable 17 so that both ends of the U-shaped steel sheet pile 1 remain stable, then open the metal splint 36 and snap it on the outside of the sliding sleeve 23, and connect the crane cable 25 to the third circle. Outside the ring 24, when the crane starts lifting, the U-shaped steel sheet pile 1 is lifted as a whole. When the U-shaped steel sheet pile 1 completely leaves the ground, the forward and reverse motor 8 is started to rotate the gear 9, thereby driving the toothed The rotating drum 10 rotates, causing the connecting rope 11 to be rolled up. When the connecting rope 11 is being rolled up, the load-bearing block 12 is dragged back, so that the corresponding oil storage tank 13 moves accordingly. When the load-bearing block 12 moves, it drives the wheels 27 on the U-shaped steel plate. The surface rotation of the pile 1 also causes the movable support arm 22 to push the sliding sleeve 23 to slide on the surface of the reinforced cable 17 when the movable support arm 22 moves, so that the crane cable 25 follows the movable support arm 22 to move. When the crane cable 25 moves, the reinforced cable 25 moves. The stress point of the cable 17 changes, causing one end of the U-shaped steel sheet pile 1 to tilt due to gravity inertia, so that the U-shaped steel sheet pile 1 transforms into a vertical state in the air, and the telescopic rod 21 contacts one side of the first plywood 5 When the U-shaped steel sheet pile 1 becomes vertical, the U-shaped steel sheet pile 1 becomes vertical. , the U-shaped steel sheet pile 1 is fixedly limited by the movable limiting column 3 to prevent the U-shaped steel sheet pile 1 from falling off.

Embodiment 2: As shown in Figure 6, a spherical seat 28 is fixedly installed in the inner cavity of the corresponding oil storage tank 13. A through hole is provided on one side of the spherical seat 28 so that the lubricating oil in the corresponding oil storage tank 13 can be discharged. The spherical Balls 29 are rotatably connected to the inner side of the seat 28. The number of the spherical seats 28 and the balls 29 is set to be multiple. The plurality of spherical seats 28 and the balls 29 are arranged in a path array in sequence about the outside of the U-shaped steel sheet pile 1, as shown in Figure 5 As shown in the figure, a counterweight 30 is placed inside the limit coating box 14. Through the arrangement of the counterweight 30, the weight of both ends of the U-shaped steel sheet pile 1 is balanced, so that it can be lifted more smoothly. The corresponding oil storage tank 13 A threaded frame 31 is fixedly installed on the top, and a threaded cover 32 is threadedly connected to the inner side of the threaded frame 31.

Regarding the above technical solution, it should be noted that when the device is actually used, the threaded cover 32 is unscrewed, so that the lubricating oil is poured from the threaded frame 31 into the inner cavity of the corresponding oil storage tank 13, and then the threaded cover 32 is The cover 32 is tightened. When the corresponding oil storage tank 13 is moving, the balls 29 roll on the surface of the U-shaped steel sheet pile 1, thereby applying the lubricating oil in the inner cavity of the corresponding oil storage tank 13 to the surface of the U-shaped steel sheet pile 1.

Embodiment 3: As shown in Figure 2, a circular limit cylinder 33 is fixedly installed on one side of the second splint 6, and a fourth ring 34 is fixedly installed on the bottom end of the movable limit column 3. The fourth ring 34 is A nylon rope 35 is connected to the outside.

Regarding the above technical solution, it should be noted that when this device is actually used, when the U-shaped steel sheet pile 1 is in a vertical state, the U-shaped steel sheet pile 1 is fixed by a static pressure pile machine, and the staff grasps the nylon rope 35 on the ground. Drag backward to drag the movable limit column 3 out of the round hole 2 so that the movable limit column 3 and the U-shaped steel sheet pile 1 no longer fit together. Then the crane lifts and drags the device out.

The last few points that should be explained are: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense and can be mechanical connections. Or electrical connection, or internal connection between two components, or direct connection. "Up", "Down", "Left", "Right", etc. are only used to express relative positional relationships. When the absolute position of the object being described is change, the relative positional relationship may change;

Secondly: the drawings of the disclosed embodiments of the present invention only involve structures related to the disclosed embodiments. Other structures can refer to common designs. The same embodiment and different embodiments of the present invention can be combined with each other without conflict;

Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (7)

1. Deep foundation pit support structure, including U-shaped steel sheet pile (1), characterized in that: a round hole (2) is opened at one end of the U-shaped steel sheet pile (1), and the inside of the round hole (2) A movable limit column (3) is provided. A rubber sealing ring (4) is provided on the outside of the movable limit column (3). A first splint (5) is fixedly installed on the outside of the rubber sealing ring (4). A second plywood (6) is fixedly installed on one side of the first plywood (5), a chassis (7) is fixedly installed on one side of the second plywood (6), and a chassis (7) is provided on the inside of the chassis (7). A forward and reverse motor (8). The output end of the forward and reverse motor (8) is rotatably connected to a gear (9). The outer side of the gear (9) is meshed with a toothed drum (10). The belt A connecting rope (11) is wound around the outside of the toothed drum (10). One end of the connecting rope (11) is fixedly connected to a load-bearing block (12). One side of the load-bearing block (12) is fixedly installed with a corresponding A type oil storage tank (13), a limited covering box (14) is fixedly installed on the top of the corresponding type oil storage tank (13), and a first ring (15) is fixedly installed on the top of the limiting covering box (14). ), a first lock (16) is sleeved on the inner side of the first ring (15), and one end of the first lock (16) is fixedly connected with a reinforced cable (17), and the reinforced cable A second lock (18) is fixedly connected to one end of (17). A second ring (19) is sleeved on the inner side of the second lock (18). One end of the limiting coating box (14) A circular limit seat (20) is fixedly installed on the side. A telescopic rod (21) is inserted into the circular limit seat (20). One end of the telescopic rod (21) is fixedly installed with a movable support arm ( 22), a metal splint (36) is inserted into the top of the movable support arm (22), a sliding sleeve (23) is clamped on one side of the metal splint (36), and the outer side of the sliding sleeve (23) A third ring (24) is fixedly connected, and a crane cable (25) is sleeved on the inner side of the third ring (24). 2. The deep foundation pit support structure according to claim 1, characterized in that: a horizontal support rod (26) is inserted into the inside of the load-bearing block (12), and the horizontal support rod (26) Both ends are rotatably connected with wheels (27). 3. The deep foundation pit support structure according to claim 1, characterized in that: a spherical seat (28) is fixedly installed in the inner cavity of the corresponding oil storage tank (13), and the inner side of the spherical seat (28) The rotating connection is provided with balls (29). 4. The deep foundation pit support structure according to claim 3, characterized in that: the number of the spherical seats (28) and the balls (29) is set to multiple, and the plurality of the spherical seats (28) and the balls (29) The U-shaped steel sheet piles (1) are arranged sequentially in a path array on the outside. 5. The deep foundation pit support structure according to claim 3, characterized in that: a counterweight block (30) is placed inside the limit coating box (14), and the corresponding oil storage tank (13) A threaded frame (31) is fixedly installed on the top, and a threaded cover (32) is threadedly connected to the inner side of the threaded frame (31). 6. The deep foundation pit support structure according to claim 1, characterized in that: a circular limiting cylinder (33) is fixedly installed on one side of the second plywood (6), and the movable limiting column (33) is fixedly installed on one side of the second plywood (6). 3) A fourth ring (34) is fixedly installed at the bottom end, and a nylon rope (35) is sleeved on the outside of the fourth ring (34). 7. The deep foundation pit support structure according to claim 1, characterized in that: the metal splint (36) is made of plastic material, and the metal splint (36) and the sliding sleeve (23) are in a clamping shape. The sliding sleeve (23) and the reinforced cable (17) are arranged in a sliding connection.