A foundation pit support structure

Abstract

The utility model provides a foundation pit support structure, including first casing, first casing one end is provided with second casing, the utility model has the beneficial effect that: pull the shade and insert the mounting plate into the spigot, rotate second casing makes the mounting plate rotate cavity slide, finally loosen the shade, cooperate the sliding block and reset spring to make locking lever insert into mounting seat and mounting plate in proper order, can connect first casing with second casing together to length adjustment of casing can be carried out according to the depth of pile hole, expand the applicability of support structure, the support structure can prevent soil etc from falling to the junction of first casing and second casing through the shade in the process of using, thereby facilitating subsequent separation first casing and second casing, since the shade is funnel -shaped can direct soil etc on its surface to the outside, thereby be favorable to reduce the resistance that casing receives in the process of pulling out.

Description

Technical Field

[0001] This utility model is a foundation pit support structure, belonging to the field of foundation pit support. Background Technology

[0002] Foundation pit support refers to temporary support, reinforcement, protection, and groundwater control measures taken to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. In foundation pit support, cast-in-place piles are typically used for support, and during the construction of the cast-in-place pile foundations, casings are often used to prevent the pile holes from collapsing.

[0003] In existing technologies, when the length of a single casing is less than the depth of the pile hole, multiple casings are joined together and fixed with bolts in some foundation pit support structures. However, due to the large number of bolts used for fixing, it takes a lot of time to assemble the casings, which reduces work efficiency. Furthermore, after the casings are recycled, soil and other debris will adhere to the casing surface and block the bolts, requiring the area around the bolts to be cleaned before the casings can be disassembled. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a foundation pit support structure to solve the problems mentioned in the background art. Due to the large number of bolts used for fixing, some foundation pit support structures require a lot of time to assemble the casing, which reduces work efficiency. Moreover, after the casing is recycled, soil and other materials will adhere to the surface of the casing and cover the bolts, which means that the area around the bolts needs to be cleaned before several casings can be disassembled.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a foundation pit support structure, including a first casing, a second casing provided at one end of the first casing, mounting seats fixedly connected to the surfaces of both the first casing and the second casing, a mounting plate fixedly connected to the surface of the second casing, and a steel cage provided inside both the first casing and the second casing.

[0006] The mounting base has a rotating cavity, and one side of the mounting base has an insertion port that passes through the rotating cavity. The inner walls of the first protective sleeve and the second protective sleeve are both fixedly connected to a return spring. The other end of the return spring is fixedly connected to a cover. The inner wall of the cover is fixedly connected to several locking rods. The locking rods are slidably connected to the mounting base and to the mounting plate.

[0007] Furthermore, the shield is funnel-shaped, and the maximum diameter of the shield is slightly larger than the diameter of the mounting base, the diameter of the mounting base being the same as the diameter of the mounting plate.

[0008] Furthermore, a number of sliders are fixedly connected to the side of the shield near the first protective cylinder, and the sliders are T-shaped.

[0009] Furthermore, a fixing ring is fixedly connected to one side of the mounting plate, and a sealing gasket is fitted on the surface of the fixing ring.

[0010] Furthermore, the surface of the first casing has an overflow port on one side of the mounting base, and the overflow port is circular.

[0011] Furthermore, a connecting frame is fixedly connected to the top of the first casing, and a plurality of threaded rods are threadedly connected to the connecting frame. A guide rod is slidably connected to one side of the threaded rod inside the connecting frame, and a positioning plate is rotatably connected to one end of the threaded rod. The positioning plate and the guide rod are fixedly connected.

[0012] Furthermore, a roller is rotatably connected inside the positioning plate, and the roller is slidably connected to the reinforcing cage.

[0013] Furthermore, a scale is fixedly connected to the surface of the guide rod, and the surface of the scale is coated with a fluorescent layer.

[0014] Furthermore, the steel cage includes several transverse steel bars, and several longitudinal steel bars are fixedly connected to the outside of the transverse steel bars.

[0015] Furthermore, a number of lifting rings are fixedly connected to the surface of the first casing above the overflow port, and the lifting rings are distributed at equal intervals around the first casing.

[0016] The beneficial effects of this utility model are as follows: Pull the cover and insert the mounting plate into the socket, then rotate the second casing to make the mounting plate slide inside the rotating cavity, and finally release the cover. With the help of the slider and the return spring, the locking rod will be inserted into the mounting seat and the mounting plate in sequence, thus connecting the first casing and the second casing together. This allows the length of the casing to be adjusted according to the depth of the pile hole, expanding the applicability of the support structure. During use, the cover can prevent soil and other debris from falling to the connection between the first casing and the second casing, thus facilitating the subsequent separation of the first casing and the second casing. Since the cover is funnel-shaped, it can guide soil and other debris falling onto its surface to the outside, thereby reducing the resistance encountered by the casing during the extraction process. Because the connection method between the two second casings is similar to that between the first casing and the second casing, it will not be described in detail here.

[0017] The positioning plate is moved by the threaded rod, connecting frame and guide rod, which restricts the movement trajectory of the steel cage in the first and second casings, thereby avoiding collision between the steel cage and the inner wall of the first and second casings due to shaking during hoisting. The rollers connected in the positioning plate can reduce the friction between the steel cage and the positioning plate, thus making it easier to place the steel cage. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a foundation pit support structure according to the present invention;

[0020] Figure 2 This is a schematic diagram of the disassembly and assembly structure of the first and second casings of a foundation pit support structure according to the present invention;

[0021] Figure 3 This is a schematic diagram of the mounting base structure of a foundation pit support structure according to the present invention;

[0022] Figure 4 This is a schematic diagram of the mounting plate structure of a foundation pit support structure according to the present invention;

[0023] Figure 5 This is a schematic diagram of the connecting frame structure of a foundation pit support structure according to the present invention;

[0024] In the diagram: 1. First casing; 101. Overflow port; 102. Lifting ring; 2. Second casing; 3. Mounting base; 301. Rotating cavity; 302. Insertion port; 303. Return spring; 304. Cover; 3041. Slider; 305. Locking rod; 4. Mounting plate; 401. Fixing ring; 402. Sealing gasket; 5. Reinforcing cage; 501. Horizontal reinforcing bar; 502. Longitudinal reinforcing bar; 6. Connecting frame; 601. Threaded rod; 602. Guide rod; 6021. Scale; 603. Positioning plate; 6031. Roller. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Please see Figures 2 to 4 This utility model provides a technical solution: a foundation pit support structure, including a first casing 1, a second casing 2 provided at one end of the first casing 1, mounting bases 3 fixedly connected to the surfaces of the first casing 1 and the second casing 2, mounting plates 4 fixedly connected to the surface of the second casing 2, and steel cages 5 provided inside the first casing 1 and the second casing 2.

[0027] The mounting base 3 has a rotating cavity 301 inside, and a slot 302 through the rotating cavity 301 is opened on one side of the mounting base 3. The inner walls of the first protective sleeve 1 and the second protective sleeve 2 are both fixedly connected with a return spring 303. The other end of the return spring 303 is fixedly connected with a cover 304. Several locking rods 305 are fixedly connected to the inner wall of the cover 304. The locking rods 305 are slidably connected to the mounting base 3 and to the mounting plate 4.

[0028] Pull the cover 304 and insert the mounting plate 4 into the socket 302. Then rotate the second protective cylinder 2 to make the mounting plate 4 slide in the rotating cavity 301. Finally, release the cover 304. With the cooperation of the slider 3041 and the return spring 303, the locking rod 305 will be inserted into the mounting base 3 and the mounting plate 4 in sequence, so that the first protective cylinder 1 and the second protective cylinder 2 can be connected together. Since the connection method between the two second protective cylinders 2 is similar to the connection method between the first protective cylinder 1 and the second protective cylinder 2, it will not be described again here.

[0029] Furthermore, the shield 304 is funnel-shaped, and its maximum diameter is slightly larger than that of the mounting base 3, which has the same diameter as the mounting plate 4. The funnel shape of the shield 304 guides soil and other debris falling onto its surface to the outside, thereby reducing the resistance encountered by the casing during extraction.

[0030] Furthermore, a plurality of sliders 3041 are fixedly connected to the side of the shield 304 near the first protective cylinder 1. The sliders 3041 are T-shaped. The T-shape of the sliders 3041 can limit the movement trajectory of the sliders 3041 outside the first protective cylinder 1 and the second protective cylinder 2, thereby preventing the sliders 3041 from detaching from the first protective cylinder 1 and the second protective cylinder 2 during the sliding process.

[0031] Furthermore, a fixing ring 401 is fixedly connected to one side of the mounting plate 4, and a sealing gasket 402 is fitted on the surface of the fixing ring 401. The sealing gasket 402 can improve the sealing between the mounting plate 4 and the mounting base 3, thereby further improving the tightness of the connection between the first protective sleeve 1 and the second protective sleeve 2. Since the sealing gasket 402 is fitted on the surface of the fixing ring 401, it can be replaced, thus ensuring the sealing performance of the sealing gasket 402.

[0032] Preferably, a plurality of lifting rings 102 are fixedly connected to the surface of the first casing 1 above the overflow port 101, and the lifting rings 102 are evenly distributed around the first casing 1. The lifting rings 102 facilitate the hoisting of the first casing 1.

[0033] Please see Figure 5The present invention provides a technical solution: a connecting frame 6 is fixedly connected to the top of the first protective sleeve 1, a plurality of threaded rods 601 are threadedly connected to the connecting frame 6, a guide rod 602 is slidably connected to one side of the threaded rods 601 inside the connecting frame 6, a positioning plate 603 is rotatably connected to one end of the threaded rods 601, and the positioning plate 603 and the guide rod 602 are fixedly connected.

[0034] The threaded rod 601, connecting frame 6, and guide rod 602 drive the positioning plate 603 to move, thereby restricting the movement trajectory of the steel cage 5 within the first casing 1 and the second casing 2, thus preventing the steel cage 5 from colliding with the inner walls of the first casing 1 and the second casing 2 due to shaking during hoisting.

[0035] Preferably, a roller 6031 is rotatably connected inside the positioning plate 603, and the roller 6031 is slidably connected to the reinforcing cage 5. The roller 6031 can reduce the friction between the reinforcing cage 5 and the positioning plate 603, thereby facilitating the placement of the reinforcing cage 5.

[0036] Furthermore, a scale 6021 is fixedly connected to the surface of the guide rod 602, and the surface of the scale 6021 is coated with a fluorescent layer. The scale 6021 ensures that after the positioning plates 603 are moved, their centers are on the same horizontal line as the center of the first protective cylinder 1.

[0037] Please see Figure 1 This utility model provides a technical solution: an overflow port 101 is provided on the surface of the first casing 1 on one side of the mounting base 3, and the overflow port 101 is circular. Excess mud can be guided back to the mud tank through the overflow port 101, thereby enabling the recycling of mud.

[0038] Please see Figure 1 The present invention provides a technical solution: the steel cage 5 includes a number of transverse steel bars 501, and a number of longitudinal steel bars 502 are fixedly connected to the outside of the transverse steel bars 501.

[0039] The reinforcing cage 5 is fabricated on-site according to the conditions of the pile hole, and welding is the preferred method for connecting the transverse reinforcing bars 501 and the longitudinal reinforcing bars 502.

[0040] Detailed Implementation: Pulling the cover 304 causes the slider 3041 fixed to its inner wall to slide along the inner wall of the first protective cylinder 1 and compress the return spring 303 until the locking rod 305 fixed to the inner wall of the cover 304 disengages from the mounting base 3. Then, keeping the cover 304 stationary, the mounting plate 4 fixed to the surface of the second protective cylinder 2 is inserted into the insertion port 302 at one end of the first protective cylinder 1. Next, the second protective cylinder 2 is rotated so that the mounting plate 4 slides within the rotating cavity 301 in the mounting base 3. Finally, the cover 304 is released, and under the action of the return spring 303, the cover 304 will return to its original position and drive the locking rod 305 to be inserted into the mounting base 3 and the mounting plate 4 in sequence. This allows the first casing 1 and the second casing 2 to be connected together, thus enabling the length of the casing to be adjusted according to the depth of the pile hole, expanding the applicability of the support structure. During use, the shield 304 can prevent soil and other debris from falling onto the connection between the first casing 1 and the second casing 2, facilitating the subsequent separation of the first casing 1 and the second casing 2. Since the shield 304 is funnel-shaped, it can guide soil and other debris falling onto its surface to the outside, thereby reducing the resistance encountered by the casing during the extraction process. Because the connection method between the two second casings 2 is similar to the connection method between the first casing 1 and the second casing 2, it will not be described in detail here.

[0041] Rotating the threaded rod 601 causes it to move along the connecting frame 6 fixed to the top of the first casing 1. Due to the restriction of the guide rod 602, the positioning plate 603 connected to one end of the threaded rod 601 will move towards the center of the first casing 1, which restricts the movement trajectory of the reinforcing cage 5 in the first casing 1 and the second casing 2. This prevents the reinforcing cage 5 from colliding with the inner walls of the first casing 1 and the second casing 2 due to shaking during hoisting. The roller 6031 connected in the positioning plate 603 can reduce the friction between the reinforcing cage 5 and the positioning plate 603, thus facilitating the placement of the reinforcing cage 5.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A foundation pit support structure, comprising a first casing (1), wherein a second casing (2) is provided at one end of the first casing (1), characterized in that: The first casing (1) and the second casing (2) are both fixedly connected to the surface of the mounting base (3), the second casing (2) is fixedly connected to the surface of the mounting plate (4), and the first casing (1) and the second casing (2) are both provided with a steel cage (5); The mounting base (3) has a rotating cavity (301) inside. The mounting base (3) has an insertion port (302) through the rotating cavity (301) on one side. The inner walls of the first protective sleeve (1) and the second protective sleeve (2) are fixedly connected with a return spring (303). The other end of the return spring (303) is fixedly connected with a cover (304). The inner wall of the cover (304) is fixedly connected with several locking rods (305). The locking rods (305) are slidably connected to the mounting base (3) and to the mounting plate (4).

2. The foundation pit support structure according to claim 1, characterized in that: The shield (304) is funnel-shaped, and the maximum diameter of the shield (304) is slightly larger than the diameter of the mounting base (3). The diameter of the mounting base (3) is the same as the diameter of the mounting plate (4).

3. The foundation pit support structure according to claim 1, characterized in that: The shield (304) has several sliders (3041) fixedly connected to the side near the first protective cylinder (1), and the sliders (3041) are T-shaped.

4. The foundation pit support structure according to claim 1, characterized in that: A fixing ring (401) is fixedly connected to one side of the mounting plate (4), and a sealing gasket (402) is fitted on the surface of the fixing ring (401).

5. The foundation pit support structure according to claim 1, characterized in that: The first casing (1) has an overflow port (101) on one side of the mounting base (3), and the overflow port (101) is circular.

6. The foundation pit support structure according to claim 1, characterized in that: The first sleeve (1) is fixedly connected to a connecting frame (6) at its top end. The connecting frame (6) is internally threaded with several threaded rods (601). A guide rod (602) is slidably connected to one side of the threaded rod (601) inside the connecting frame (6). A positioning plate (603) is rotatably connected to one end of the threaded rod (601). The positioning plate (603) and the guide rod (602) are fixedly connected.

7. The foundation pit support structure according to claim 6, characterized in that: The positioning plate (603) is rotatably connected to a roller (6031), and the roller (6031) is slidably connected to the steel cage (5).

8. The foundation pit support structure according to claim 6, characterized in that: A scale (6021) is fixedly connected to the surface of the guide rod (602), and the surface of the scale (6021) is coated with a fluorescent layer.

9. The foundation pit support structure according to claim 1, characterized in that: The steel cage (5) includes several transverse steel bars (501), and several longitudinal steel bars (502) are fixedly connected to the outside of the transverse steel bars (501).

10. A foundation pit support structure according to claim 5, characterized in that: A number of lifting rings (102) are fixedly connected to the surface of the first casing (1) above the overflow port (101), and the lifting rings (102) are distributed at equal intervals around the first casing (1).

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