Deep foundation pit backfilling device

Abstract

The utility model provides a deep foundation pit backfilling device, and belongs to the technical field of deep foundation pit backfilling. Adjustable supporting legs and locking universal wheels are fixedly installed on the bottom face of a supporting frame, a balance weight stacking groove is fixedly installed in the supporting frame, a balance weight is placed in the balance weight stacking groove, the top end of the supporting frame is fixedly connected with one end of a supporting frame, and the other end of the bottom face of the supporting frame is detachably and fixedly connected with the upper end of a top end barrel. The lower end of the top end cylinder is arranged in the upper end of the telescopic cylinder in a sleeved mode, and the top end cylinder and the telescopic cylinder can slide relatively and are limited in the height direction. According to the utility model, the backfill soil can be accurately backfilled to the required position, the collision to the side wall of the foundation pit is avoided, the problem of narrow backfill terrain of the deep foundation pit is effectively solved, the noise pollution can be reduced, and the dust raising height can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to a deep foundation pit backfilling device, belonging to the field of deep foundation pit backfilling technology. Background Technology

[0002] To construct more and taller buildings on limited land while meeting the demand for underground space, it is often necessary to excavate foundation pits exceeding 5 meters in depth, i.e., deep foundation pits. In addition, complex geological conditions and the surrounding environment are also important factors that drive the emergence of deep foundation pit projects.

[0003] When backfilling deep foundation pits, traditional methods typically require excavators to directly push the backfill soil into the pit. However, this often results in collisions with the pit's sidewalls, generating significant noise pollution and dust. Furthermore, this method is unsuitable for backfilling projects with limited space, deep backfilling depths (over 5 meters), and high backfilling quality requirements. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a deep foundation pit backfilling device.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A deep foundation pit backfilling device includes: a support frame, a counterweight stacking groove, adjustable support legs, universal wheels with locking, a top cylinder, a telescopic cylinder, a counterweight block, and a support frame.

[0007] The bottom surface of the support frame is fixedly installed with adjustable support legs and locking casters. The support frame is fixedly installed with a counterweight placement slot, in which a counterweight block is placed. The top of the support frame is fixedly connected to one end of the support frame, and the other end of the bottom surface of the support frame is detachably fixedly connected to the upper end of the top cylinder. The lower end of the top cylinder is fitted inside the upper end of the telescopic cylinder, and the top cylinder and the telescopic cylinder can slide relative to each other and be limited in height direction.

[0008] Preferably, the support frame includes: two support arms and several connecting rods; one end of the two support arms is fixedly connected to the top of the support frame, and the two support arms are fixedly connected to several connecting rods.

[0009] Preferably, the top cylindrical body includes: a funnel-shaped feed inlet, a cylindrical body, and a baffle; the funnel-shaped feed inlet is fixedly connected to the top of the cylindrical body, and a baffle is provided around the bottom of the outer wall of the cylindrical body; the cylindrical body is a hollow frustum structure with openings at the top and bottom, and is narrower at the top and wider at the bottom.

[0010] Preferably, the telescopic cylinder has at least two sections, each section comprising: a second cylinder body, a second baffle, and a third baffle; the second baffle is provided around the top edge of the inner wall of the second cylinder body; the third baffle is provided around the bottom edge of the outer wall of the second cylinder body; the second cylinder body is a hollow frustum structure with openings at the top and bottom, and is narrower at the top and wider at the bottom; the upper end face of the first baffle of the top cylinder body contacts the lower end face of the second baffle of the telescopic cylinder body, limiting the telescopic cylinder body in the height direction; the connection method between two adjacent telescopic cylinder sections is as follows: the lower end of the upper telescopic cylinder body is fitted inside the upper end of the lower telescopic cylinder body, and the upper end face of the third baffle of the upper telescopic cylinder body contacts the lower end face of the second baffle of the lower telescopic cylinder body, limiting the lower telescopic cylinder body in the height direction.

[0011] Preferably, the bottom surfaces of the two support arms are located between the support frame and the top cylinder and are supported by support blocks, and the support blocks are set on the upper surface of the edge of the deep foundation pit sidewall.

[0012] Preferably, the top of the funnel-shaped feed inlet is detachably and fixedly connected to the support arm by bolts; and a rope fixing ring is provided on the edge of the top of the funnel-shaped feed inlet.

[0013] Preferably, the support frame is fixedly connected to the left and right sides with reinforcing rods.

[0014] Preferably, a push handle is fixedly connected to the support frame, and a rope fixing ring is installed at the top of the support frame.

[0015] Preferably, the adjustable support leg is a hydraulic support leg.

[0016] Preferably, the center of the counterweight block is provided with a through hole that matches the counterweight fixing tube, and the lower end of the counterweight fixing tube matches the through hole of the counterweight block and is fixedly connected to the bottom surface of the counterweight stacking groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention employs a method of extending the top cylinder and telescopic cylinder as a whole into the deep foundation pit for backfilling. This method can backfill the soil to the required location and avoid collisions with the side walls of the foundation pit, effectively solving the problem of difficult backfilling in narrow terrain of deep foundation pits. It can also reduce noise pollution and effectively lower the height of dust.

[0019] This utility model, with its adjustable support legs, can adapt to sloping road surfaces, ensuring that the top cylinder and telescopic cylinder do not contact the sidewalls of the deep foundation pit, and keeping the top cylinder and telescopic cylinder as vertical as possible. This can minimize the impact of backfill soil on the cylinder wall during backfilling, and also prevent the cylinder from impacting the sidewalls of the foundation pit. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the main structure of a deep foundation pit backfilling device according to the present invention.

[0021] Figure 2 This is a top view of a deep foundation pit backfilling device according to the present invention.

[0022] Figure 3 This is a schematic cross-sectional view of the top cylindrical structure of a deep foundation pit backfilling device according to the present invention.

[0023] Figure 4 This is a schematic cross-sectional view of the telescopic cylinder structure of a deep foundation pit backfilling device according to the present invention.

[0024] The reference numerals in the diagram are as follows: 1 is the support frame, 2 is the counterweight stacking slot, 3 is the support arm, 4 is the adjustable support leg, 5 is the swivel caster with locking, 6 is the top cylinder, 6-1 is the funnel-shaped feed inlet, 6-2 is the cylinder body one, 6-3 is the first baffle, 7 is the telescopic cylinder, 7-1 is the second baffle, 7-2 is the second cylinder body, 7-3 is the third baffle, 8 is the counterweight block, 9 is the counterweight fixing tube, 10 is the support block, 11 is the edge of the deep foundation pit sidewall, 12 is the connecting rod, 13 is the bolt, 14 is the reinforcing rod, 15 is the push handle, and 16 is the rope fixing ring. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented based on the technical solution of the present invention and provides detailed implementation methods, but the protection scope of the present invention is not limited to the following embodiments. Specific implementation method one:

[0027] like Figure 1 As shown, four adjustable support legs 4 and four locking casters 5 are fixedly installed on the bottom surface of the support frame 1. The adjustable support legs 4 are hydraulic support legs, such as hydraulic jacks, which are purchased externally. The adjustable support legs 4 are arranged in pairs on the left and right sides of the bottom surface of the support frame 1 to adjust and control the angle of the deep foundation pit backfilling device. When the support frame 1 is located on sloping ground, the height of the four corners of the support frame 1 is adjusted by the adjustable support legs 4 to keep the support frame 1 in a horizontal state. This ensures that the top cylinder 6 and the telescopic cylinder 7 do not contact the side wall of the deep foundation pit, making the top cylinder and the telescopic cylinder as vertical as possible. This can minimize the impact of the backfill soil on the cylinder wall during backfilling, reduce construction noise, and prevent the cylinder from hitting the side wall of the foundation pit. Four locking casters 5 are used. The support frame 1 features 50mm wide polyurethane casters with a single caster capable of supporting up to 2 tons. Each caster is equipped with a locking mechanism and a push-button brake. Movable brake support pipes made of 150mm diameter steel pipes can be installed on both sides of the support frame 1, utilizing the resistance of the steel pipes against the ground for braking and fixation. Both braking methods can be used simultaneously. A counterweight placement slot 2 is fixedly installed inside the support frame 1, containing a counterweight block 8. The counterweight block 8 has a through hole in its center that matches a counterweight fixing pipe 9. The lower end of the counterweight fixing pipe 9 passes through the through hole in the counterweight block 8 and is fixedly connected to the bottom of the counterweight placement slot 2. The counterweight block 8 is secured by the counterweight fixing pipe 9, preventing it from moving or slipping when the support frame 1 is moved. The counterweight block 8 is a precast solid C20 concrete block with a 50mm diameter through hole in its center for the counterweight fixing pipe 9 to pass through and fix it. The counterweight block specifications are as follows. It is easy to install, disassemble, and transport, and can be reused multiple times.

[0028] Reinforcing rods are fixedly connected to the left and right sides of the support frame 1 to ensure its stability; for example Figure 2 As shown, a push handle 15 is fixedly connected to the support frame 1, which facilitates the movement of workers. A rope fixing ring 16 is installed at the top of the support frame 1. When the device is heavy and difficult to move, a crane can be used to lift the support frame 1 slightly and move it by passing a steel wire rope through the rope fixing ring 16, so that workers can work together to push the deep foundation pit backfilling device to the required position.

[0029] The top of the support frame 1 is fixedly connected to one end of the support frame, and the other end of the bottom surface of the support frame is detachably fixedly connected to the upper end of the top cylinder 6. The lower end of the top cylinder 6 is fitted inside the upper end of the telescopic cylinder 7, and the top cylinder 6 and the telescopic cylinder 7 can slide relative to each other and be limited in height. The support frame includes two support arms 3 and several connecting rods 12; one end of each of the two support arms 3 is fixedly connected to the top of the support frame 1, and the two support arms 3 are fixedly connected to several connecting rods 12. Specifically, the support arms 3 are fixedly connected to the left and right crossbeams at the top of the support frame 1, which can be fixed by welding or by bolts, so that the support frame 1 is stably installed on the support arms 3. When using the deep foundation pit backfilling device, the bottom surfaces of the two support arms 3 are located between the support frame 1 and the top cylinder 6 and are supported by support blocks 10, and the support blocks 10 are set on the upper surface of the edge 11 of the deep foundation pit sidewall. The support blocks 10 can support and stabilize the support frame 1.

[0030] like Figure 3As shown, the top cylindrical body 6 includes: a funnel-shaped feed inlet 6-1, a cylindrical body 6-2, and a baffle 6-3. The top cylindrical body 6 is welded from 5mm thick steel plates. The funnel-shaped feed inlet 6-1 is fixedly connected to the cylindrical body 6-2. The bottom of the outer wall of the cylindrical body 6-2 is provided with baffles 6-3. The cylindrical body 6-2 is a hollow frustum structure with openings at the top and bottom, and is narrower at the top and wider at the bottom. The top of the funnel-shaped feed inlet 6-1 is detachably fixed to the support arm 3 and the connecting rod 12 connecting the support arm 3 by bolts 13. The edge of the top of the funnel-shaped feed inlet 6-1 is provided with a rope fixing ring 16. When installing the top cylindrical body 6 and the telescopic cylindrical body 7, a crane can be used to pass the wire rope through the rope fixing ring 16, lift it up, put it into the deep foundation pit, and then move it to the support frame 1 for installation.

[0031] like Figure 4 As shown, the telescopic cylinder 7 is welded from 5mm thick steel plates. Each section of the telescopic cylinder 7 includes: cylinder body 2 7-2, baffle 2 7-1, and baffle 3 7-3. Baffle 2 7-1 is provided around the top of the inner wall of cylinder body 2 7-2. Baffle 3 7-3 is provided around the bottom of the outer wall of cylinder body 2 7-2. Cylinder body 2 7-2 is a hollow frustum structure with openings at the top and bottom, and is narrower at the top and wider at the bottom. When the top cylinder 6 and the telescopic cylinder 7 are straightened, the upper end face of baffle 1 6-3 of the top cylinder 6 contacts the lower end face of baffle 2 7-1 of the telescopic cylinder 7. Through this structure, the telescopic cylinder 7 is limited in the height direction to prevent it from falling out. The connection method between two adjacent telescopic cylinder sections 7 is as follows: the lower end of the upper telescopic cylinder 7 is fitted inside the upper end of the lower telescopic cylinder 7. When the two adjacent telescopic cylinder sections 7 are straightened, the upper end face of the third baffle 7-3 of the upper telescopic cylinder 7 contacts the lower end face of the second baffle 7-1 of the lower telescopic cylinder 7. Through this structure, the lower telescopic cylinder 7 is limited in height to prevent it from coming off. The number of telescopic cylinder sections 7 is at least two, which can be selected according to the height of the deep foundation pit at the construction site. The inner diameter of the telescopic cylinder sections 7 increases by 6cm from top to bottom, and the height is the same or increases step by step. When in use, after backfilling is completed, after the bottom surface of the telescopic cylinder section 7 contacts the ground, since the upper opening of the second cylinder section 7-2 is larger than the lower opening of the first cylinder section 6-2, the top cylinder section 6 will fall naturally, thereby retracting the top cylinder section 6 into the telescopic cylinder 7. When there are multiple telescopic cylinder sections 7, they are all retracted into the bottom telescopic cylinder section 7, which can save space.

[0032] The working process of this deep foundation pit backfilling device is as follows:

[0033] 1. Site leveling: The site must be leveled during construction. The site for welding operations in the deep foundation pit backfilling device must meet the leveling requirements and a 10m×6m area must be set up for welding operations.

[0034] 2. Cylinder fabrication: On-site, 5mm thick steel plates are used to weld the top cylinder 6 and the telescopic cylinder 7. The cross-sectional dimensions of the cylinder body 6 (section 1, 6-2) and the telescopic cylinder 7 (section 2, 7-2) increase by 60mm in inner diameter from top to bottom.

[0035] 3. Frame and counterweight fabrication: A 5m×1.5m×1.5m rectangular support frame 1 is welded using 18# channel steel. The two support arms 3 are 8m long and are welded and fixed to the support frame 1. The counterweight stacking slot 2 is fixedly installed inside the support frame 1. Adjustable support legs 4 and locking casters 5 are fixedly installed on the bottom surface of the support frame 1. The tilt angle of the support frame 1 can be adjusted by adjusting the adjustable support legs 4 to adapt to the sloping ground.

[0036] 4. Equipment Assembly: Transport the support frame 1, counterweight 8, top cylinder 6, and telescopic cylinder 7 to the backfilling location and begin assembly using a tower crane. Adjust the support frame 1 according to the site slope to ensure that the top cylinder 6 and telescopic cylinder 7 are as vertical as possible. After completion, conduct two trial runs to confirm normal operation before proceeding with backfilling.

[0037] 5. Backfill soil delivery: Select backfill soil that meets the requirements according to the drawings. Do not use construction waste, lumpy soil, overmixed soil, silt, humus, frozen soil, cultivated soil, or soil with an organic matter content greater than 8%.

[0038] 6. Backfilling Operation: Workers are stationed at both the upper and lower parts of the foundation pit, with a safety manager overseeing the entire process. Backfilling should be carried out at a uniform speed, and the distance between the backfill position and the edge of the soil outlet of the bottom telescopic cylinder 7 should be measured to be 0.8-1 meters. Ensure that the top cylinder 6 and telescopic cylinder 7 are not affected by the backfill soil and can move normally during backfilling. During operation, the backfill soil is loaded into the funnel-shaped feed inlet 6-1 of the top cylinder 6 via soil transport equipment. The backfill soil is then filled along the inner walls of the top cylinder 6 and telescopic cylinder 7 to the bottom of the deep foundation pit, avoiding damage to the building side walls and protecting the construction personnel below. Furthermore, during use, a rope fixing ring 16 can be fixed to the outer wall of the bottom telescopic cylinder 7. A steel wire rope is passed through the rope fixing ring 16, and then a crane is used to pull the steel wire rope up, slightly raising the bottom telescopic cylinder 7 to prevent backfill soil accumulation at the bottom of the telescopic cylinder 7 during backfilling. After the backfill reaches a height of 350mm, it is compacted again with a rammer; then backfilling is carried out again, and after the height reaches 350mm, it is compacted again with a rammer; this process is repeated until the backfill reaches the design elevation.

[0039] 7. Equipment Transfer: After the backfill reaches the design elevation, use a tower crane to connect the steel wire rope in the rope fixing ring 16 on the top cylinder 6 to disassemble the top cylinder 6 from the support frame 1. Then, the tower crane pulls up the steel wire rope to pull the top cylinder 6 and the telescopic cylinder 7 together upwards, moving the top cylinder 6 and the telescopic cylinder 7 out of the deep foundation pit and placing them on the ground so that the top cylinder 6 can be retracted into the telescopic cylinder 7. After that, move the support frame 1 laterally at a uniform speed to avoid damage to the side walls.

[0040] Precautions:

[0041] 1. Protective measures should be strengthened for the reserved pipeline locations in deep foundation pits to prevent damage, displacement or deformation caused by impact to the pipelines during backfilling.

[0042] 2. Before backfilling, debris inside and on the side walls of the deep foundation pit must be cleared. Adjust the flatness and length of the top cylinder 6 and the telescopic cylinder 7. Extend the top cylinder 6 and the telescopic cylinder 7 into the designated position in the deep foundation pit, ensuring no contact or collision with the building walls and lintels.

[0043] 3. Backfilling must be carried out in layers and vibrated to ensure compaction. After backfilling, the laboratory shall use the sand filling method to test the compaction degree, which shall not be less than 0.94.

[0044] The above description is merely a preferred embodiment of this utility model. These specific embodiments are different implementations based on the overall concept of this utility model, and the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A deep foundation pit backfilling device, characterized in that, include: Support frame (1), counterweight stacking slot (2), adjustable support legs (4), universal wheels with locking (5), top cylinder (6), telescopic cylinder (7), counterweight block (8) and support frame; The bottom surface of the support frame (1) is fixedly installed with adjustable support legs (4) and locking casters (5). The support frame (1) is fixedly installed with a counterweight placement groove (2). A counterweight block (8) is placed in the counterweight placement groove (2). The top of the support frame (1) is fixedly connected to one end of the support frame. The other end of the bottom surface of the support frame is detachably fixedly connected to the upper end of the top cylinder (6). The lower end of the top cylinder (6) is sleeved inside the upper end of the telescopic cylinder (7). The top cylinder (6) and the telescopic cylinder (7) can slide relative to each other and be limited in height direction.

2. The deep foundation pit backfilling device according to claim 1, characterized in that, The support frame includes two support arms (3) and several connecting rods (12); one end of the two support arms (3) is fixedly connected to the top of the support frame (1), and the two support arms (3) are fixedly connected to several connecting rods (12).

3. The deep foundation pit backfilling device according to claim 1, characterized in that, The top cylindrical body (6) includes: a funnel-shaped feed inlet (6-1), a cylindrical body (6-2), and a baffle (6-3); the funnel-shaped feed inlet (6-1) is fixedly connected to the top of the cylindrical body (6-2), and a baffle (6-3) is provided around the bottom of the outer wall of the cylindrical body (6-2); the cylindrical body (6-2) is a hollow frustum structure with openings at the top and bottom and is narrower at the top and wider at the bottom.

4. A deep foundation pit backfilling device according to claim 3, characterized in that, The telescopic cylinder (7) consists of at least two sections, each section comprising: a second baffle (7-1), a second cylinder body (7-2), and a third baffle (7-3); the second cylinder body (7-2) has a second baffle (7-1) around its inner top; the second cylinder body (7-2) has a third baffle (7-3) around its outer bottom; the second cylinder body (7-2) is a hollow frustum structure with openings at the top and bottom, and is narrower at the top and wider at the bottom; the top cylinder (6) has a second baffle (7-1) around its inner top; the second cylinder body (7-2) has a second baffle (7-1) around its inner top; the second cylinder body (7-2) has a second baffle (7-1) around its outer bottom ... 6-3) The upper end face contacts the lower end face of the second baffle (7-1) of the telescopic cylinder (7), limiting the telescopic cylinder (7) in the height direction; the connection method of the two adjacent telescopic cylinders (7) is as follows: the lower end of the upper telescopic cylinder (7) is sleeved inside the upper end of the lower telescopic cylinder (7), and the upper end face of the third baffle (7-3) of the upper telescopic cylinder (7) contacts the lower end face of the second baffle (7-1) of the lower telescopic cylinder (7), limiting the lower telescopic cylinder (7) in the height direction.

5. A deep foundation pit backfilling device according to claim 2, characterized in that, The bottom surfaces of the two support arms (3) are located between the support frame (1) and the top cylinder (6) and are supported by support blocks (10), and the support blocks (10) are set on the upper surface of the edge (11) of the deep foundation pit sidewall.

6. A deep foundation pit backfilling device according to claim 3, characterized in that, The top of the funnel-shaped feed inlet (6-1) is detachably and fixedly connected to the support arm (3) by bolts (13); and a rope fixing ring (16) is provided on the edge of the top of the funnel-shaped feed inlet (6-1).

7. A deep foundation pit backfilling device according to claim 1, characterized in that, The support frame (1) is fixedly connected to the left and right sides with reinforcing rods (14).

8. A deep foundation pit backfilling device according to claim 1, characterized in that, A push handle (15) is fixedly connected to the support frame (1), and a rope fixing ring (16) is installed at the top of the support frame (1).

9. A deep foundation pit backfilling device according to claim 1, characterized in that, The adjustable support leg (4) is a hydraulic support leg.

10. A deep foundation pit backfilling device according to claim 1, characterized in that, The counterweight block (8) has a through hole in the center that matches the counterweight fixing tube (9). The lower end of the counterweight fixing tube (9) passes through the through hole of the counterweight block (8) and is fixedly connected to the bottom surface of the counterweight stacking groove (2).

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