Foundation pit supporting structure of existing building

Abstract

The utility model discloses a foundation pit supporting structure of an existing building, which relates to the technical field of constructional engineering and comprises a connecting component, a supporting component and a supporting component. The connecting assembly comprises a connecting rod and a connector; the supporting assembly comprises a supporting frame and an adjusting piece, a sliding protruding head is arranged in the supporting frame, and an adjusting sliding plate is movably arranged on the adjusting piece. The supporting assembly comprises a supporting frame and a supporting plate, and the supporting frame is fixedly connected with the adjusting sliding plate; the adjusting part rotates under the action of external force so that the adjusting sliding plate can move upwards or downwards, and then the supporting frame is driven to move upwards or downwards. The whole device is stably connected with the wall face of the existing building through the connecting rods and the connectors, the supporting frame abuts against the ground, so that stable supporting is provided for the whole device, the supporting frame is arranged in the supporting frame in a sliding mode, the height is adjusted through the adjusting pieces, and in the foundation pit excavation process, the supporting frame can stably support the wall face of the existing building. The supporting frame is moved downwards through the adjusting piece, the supporting plate enters the foundation pit to support the foundation pit, and therefore supporting is achieved while excavation is conducted.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a foundation pit supporting structure of an existing building. Background Art

[0002] During the excavation of foundation pits, in order to avoid landslides, it is usually necessary to support the foundation pits. The excavation of foundation pits is carried out in the manner of "layered excavation and layer-by-layer support". In the excavation of foundation pits of existing buildings, in order to protect the stability of adjacent buildings, the excavated foundation pits also need to be supported. In the renovation project of installing escalators on the existing pedestrian walkway stairs, the installation of escalators requires the removal of part of the stair steps to excavate the foundation pit. Due to the restrictions of the pedestrian walkway and limited operating space, manual excavation is more in line with the engineering construction.

[0003] Before excavating the foundation pit, a slurry stop wall is constructed first. After passing the inspection, the foundation pit is supported and excavated. The foundation pit is usually supported by inserting support steel plates into the ground. However, due to the terrain conditions, it is difficult to use large machinery to insert the support steel plates into the ground in the channel.

[0004] The utility model with patent number CN217870517U discloses a construction foundation pit support device, including a bottom plate and a construction foundation pit support plate rotatably mounted on the top of the bottom plate, the bottom end of the bottom plate is equidistantly fixed with an anti-skid plate, and both sides of the top surface of the bottom plate are provided with a slide groove with a T-shaped structure, the top of the slide groove is matched and plugged with a slider, the bottom end of the slider is fixed with a sliding rod that is clamped with the bottom of the slide groove, and both ends of the slider are provided with a positioning groove, the top of the side wall of the construction foundation pit support plate is symmetrically fixed with a mounting frame, a first connecting rod is rotatably arranged in the mounting frame, a telescopic rod is adjustably plugged in the first connecting rod, a second connecting rod is adjustably sleeved on the bottom of the telescopic rod, and the second connecting rod is The bottom end of the connecting rod is fixed with a connecting part that fits in the sliding block, and both ends of the connecting part are elastically inserted with positioning blocks that are engaged with the positioning grooves; in this patent, support is provided by the bottom plate abutting against the bottom surface of the foundation pit, and support is provided for the foundation pit by the telescopic rod, the second connecting rod, and the building foundation pit support plate. However, when constructing in the pedestrian passage, there are buildings around the passage. In order to ensure the stability during the foundation pit excavation process, "layered excavation and layer-by-layer support" is required, and the depth of the escalator foundation pit is usually 2 to 3 meters. The foundation pit support device in the above patent can only be used after the foundation pit is completely excavated. It cannot be used in the process of foundation pit excavation. It is difficult to ensure the stability of the soil around the foundation pit. Utility Model Content

[0005] The main purpose of the utility model is to provide a foundation pit support structure for an existing building, which is used to solve the problem that it is difficult to support while excavating during the excavation of the foundation pit of an escalator in an existing pedestrian passage.

[0006] To achieve the above purpose, the utility model provides a foundation pit support structure for an existing building, comprising:

[0007] A connecting assembly includes a connecting rod and a connecting head arranged on the connecting rod; the connecting head is connected to a wall surface of an existing building;

[0008] The support assembly comprises a support frame connected with the connecting rod and an adjusting member arranged on the support frame; a sliding protrusion is arranged in the support frame; and an adjusting slide plate is movably arranged on the adjusting member;

[0009] The support assembly includes a support frame slidably arranged in a sliding protrusion and a support plate arranged on the support frame; the support frame is fixedly connected to an adjusting slide plate; the adjusting member rotates under the action of an external force to move the adjusting slide plate up or down, thereby driving the support frame to move up or down.

[0010] As a further improvement of the utility model, the connecting rod includes a connecting cross rod and a connecting vertical rod arranged on the connecting cross rod; the connecting vertical rod is provided with a connecting support rod parallel to the connecting cross rod; the connecting heads are respectively located at the ends of the connecting cross rod, the connecting vertical rod and the connecting support rod.

[0011] As a further improvement of the utility model, a support screw is provided on the inner wall of the support frame; a slide plate sleeve is provided on the end of the support screw; and the sliding protrusion is arranged on the slide plate sleeve.

[0012] As a further improvement of the utility model, a limiting screw is provided on the support frame, and a sliding groove is provided on the inner wall of the support frame; and a supporting column located in the sliding groove is provided on the limiting screw.

[0013] As a further improvement of the utility model, the adjusting member comprises an adjusting screw rotatably arranged on the support column; the adjusting slide plate is arranged on the adjusting screw by means of threads.

[0014] As a further improvement of the utility model, the side walls of the support frame are provided with inner stop convex strips; the side walls of the support plate are provided with inner grooves, and the support plate is slidably connected to the inner stop convex strips through the inner grooves.

[0015] The beneficial effects of the utility model are embodied in:

[0016] The entire device is stably connected to the wall of the existing building by setting connecting rods and connecting heads, and is abutted against the ground through a support frame, thereby providing stable support for the entire device. The support frame is slidably set in the support frame, and the height is adjusted by an adjusting piece. During the excavation of the foundation pit, the support frame and support plate are moved down by adjusting pieces into the foundation pit to provide support for the foundation pit, thereby achieving support while excavating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the foundation pit support structure of the existing building of the utility model;

[0018] Figure 2 It is a schematic diagram of the support component structure of the foundation pit support structure of an existing building of the utility model;

[0019] Figure 3 It is a schematic diagram of the supporting component structure of the foundation pit supporting structure of an existing building of the utility model;

[0020] Description of reference numerals:

[0021] 1. Connecting rod; 2. Connecting head; 3. Support frame; 4. Adjusting piece; 401. Adjusting screw; 5. Sliding convex head; 6. Adjusting slide plate; 7. Support frame; 8. Support plate; 9. Connecting cross bar; 10. Connecting vertical bar; 11. Connecting support rod; 12. Hole; 13. Support screw; 14. Slide plate cover; 15. Limiting screw; 16. Slide groove; 17. Support column; 18. Inner stop convex strip; 19. Inner groove; 20. Slideway. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] In one embodiment, see Figure 1 The utility model discloses a foundation pit supporting structure for an existing building, comprising a connecting component, a supporting component and a supporting component.

[0024] Among them, the connecting component includes a connecting rod 1, a connecting head 2 arranged on the connecting rod 1, and the connecting head 2 is connected to the wall of the existing building; the supporting component includes a supporting frame 3 connected to the connecting rod 1, an adjusting member 4 arranged on the supporting frame 3, a sliding protrusion 5 is arranged in the supporting frame 3, and an adjusting slide plate 6 is movably arranged on the adjusting member 4; the supporting component includes a supporting frame 7 slidably arranged in the sliding protrusion 5, and a supporting plate 8 arranged on the supporting frame 7, and the supporting frame 7 is fixedly connected to the adjusting slide plate 6; the adjusting member 4 rotates under the action of external force to make the adjusting slide plate 6 move up or down, thereby driving the supporting frame 7 to move up or down.

[0025] For further information, see Figure 2The connecting rod 1 includes a connecting cross bar 9, a connecting vertical bar 10 arranged on the connecting cross bar 9, a connecting support bar 11 parallel to the connecting cross bar 9 is arranged on the connecting vertical bar 10, and the connecting head 2 is respectively located at the ends of the connecting cross bar 9, the connecting vertical bar 10, and the connecting support bar 11.

[0026] Preferably, the connecting cross bar 9 , the connecting vertical bar 10 , and the connecting support bar 11 are all made of steel structure, and the connecting head 2 is a plate-like structure, and a hole 12 is provided on the connecting head 2 .

[0027] Preferably, the connecting cross bar 9, the connecting vertical bar 10, the connecting support bar 11 and the connecting head 2 can be connected by welding.

[0028] In the above arrangement, the connector 2 is fixedly connected to the wall of the existing building by passing bolts through the through holes, thereby fixing the positions of the connecting cross bar 9, the connecting vertical bar 10, and the connecting support bar 11, and the connecting cross bar 9 is located on the ground.

[0029] For further information, see Figure 2 A support screw 13 is provided on the inner wall of the support frame 3 , a slide plate sleeve 14 is provided on the end of the support screw 13 , and the sliding protrusion 5 is arranged on the slide plate sleeve 14 .

[0030] Preferably, the support frame 3 is a rectangular frame body welded with a steel structure, and a first screw hole is provided on the inner wall of the support frame 3, and the support screw rod 13 is installed in the first screw hole through a thread.

[0031] Preferably, a slideway 20 is provided on the outer wall of the support frame 7, and the sliding protrusion 5 is located inside the slideway.

[0032] In the above arrangement, the position of the slide plate cover 14 in the support frame 3 can be adjusted by rotating the support screw 13 , thereby adjusting the size of the space enclosed by the four sets of slide plate covers 14 .

[0033] For further information, see Figure 2 A limiting screw 15 is provided on the support frame 3 , and a slide groove 16 is provided on the inner wall of the support frame 3 ; a supporting column 17 located in the slide groove 16 is provided on the limiting screw 15 .

[0034] Preferably, second screw holes are provided on two opposite sets of side walls of the support frame 3, and the first screw holes and the second screw holes are respectively provided on two opposite sets of side walls of the support frame 3; two sets of limiting screws 15 are provided, and the limiting screws 15 are installed in the second screw holes through threads.

[0035] Preferably, the slide groove 16 is located on the inner wall of the support frame 3 where the first screw hole is located.

[0036] For further information, see Figure 1 , 2The adjusting member 4 includes an adjusting screw 401 rotatably disposed on the supporting column 17 , and the adjusting slide plate 6 is disposed on the adjusting screw 401 through a thread.

[0037] Preferably, a third screw hole is provided on the adjusting slide plate 6, and the adjusting screw rod 401 is connected to the third screw hole via a thread.

[0038] Preferably, a rotating sleeve is provided on the support column 17, and one end of the adjusting screw 401 is rotatably connected to the rotating sleeve.

[0039] In the above arrangement, the adjusting screw 401 is rotated to drive the adjusting slide plate 6 to move up or down under the action of the thread, thereby driving the supporting frame 7 to move up or down.

[0040] For further information, see Figure 3 An inner stop convex strip 18 is provided on the side wall of the support frame 7, and an inner groove 19 is provided on the side wall of the support plate 8. The support plate 8 is slidably connected with the inner stop convex strip through the inner groove 19.

[0041] Preferably, the support frame 7 is a three-dimensional rectangular frame, the inner stop rib 18 is located on the inner walls of the four groups of side surfaces of the support frame 3, the height of the inner stop rib 18 is less than the height of the support frame 7, and the distance from the top end of the inner stop rib 18 to the bottom end of the support frame 7 is greater than the height of the support plate 8.

[0042] Preferably, a baffle is provided at the bottom end of the inner stop convex strip.

[0043] In the above arrangement, the supporting plate 8 is connected to the inner stop ridge through the inner groove 19, so that the supporting plate 8 is installed on the four groups of side surfaces of the supporting frame 7. The height of the inner stop ridge is smaller than the height of the supporting frame 7, which facilitates the inserting of the supporting plate 8 into the supporting frame 7 from the bottom end adjacent to the supporting frame 3. The baffle at the bottom end of the inner stop ridge 18 provides support for the supporting plate 8 at the bottom end to prevent the supporting plate 8 from sliding out of the supporting frame 7, thereby providing support for the foundation pit through the supporting frame 7 and the supporting plate 8.

[0044] In this embodiment, the connecting head 2 is connected to the wall of the existing building by bolts, so that the connecting cross bar 9, the connecting vertical bar 10, and the connecting support rod 11 are connected to the wall. The connecting cross bar 9 is located on the ground, and the support frame 3 is connected to the connecting cross bar 9. The internal size of the support frame 3 is larger than the size of the foundation pit, so that the foundation pit to be excavated is wrapped inside. After the attachments on the ground of the foundation pit to be excavated are removed, the position of the slide plate cover 14 is adjusted by rotating the support screw 13 so that the slide plate cover 14 is located at the edge of the foundation pit, and then the limit screw 15 is rotated to push the support column 17 to move, and the adjusting screw 401 is connected to the adjusting slide plate 6 fixedly connected to the support frame 7 through a threaded connection, and the length of the adjusting screw 401 is adjusted so that After the four groups of column feet of the support frame 7 are respectively inserted into the slide sleeve 14, the bottom end of the adjusting screw 401 is located in the rotating sleeve to provide support for the support frame 7. At this time, the bottom end of the support frame 7 is located at the end face (ground) of the foundation pit, and the side wall of the support frame 7 is in contact with the inner wall of the foundation pit. The support frame 7 adopts steel structure welding, and its size matches the size of the foundation pit to be excavated; during the excavation of the foundation pit, the adjusting screw 401 can be rotated, and under the action of gravity of the threaded support frame 7, the support frame 7 can be moved down into the foundation pit, and the support plate 8 can be installed on the support frame 7 to provide support for the foundation pit, thereby providing stable support for the surrounding areas of the excavated foundation pit. After the support is completed, the foundation pit can be excavated again to provide support for the foundation pit while excavating.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The foundation pit support structure of an existing building is characterized by: include: A connection assembly comprises a connection rod (1) and a connection head (2) arranged on the connection rod (1); the connection head (2) is connected to a wall surface of an existing building; The support assembly comprises a support frame (3) connected to a connecting rod (1) and an adjusting member (4) arranged on the support frame (3); a sliding protrusion (5) is arranged in the support frame (3); and an adjusting slide plate (6) is movably arranged on the adjusting member (4); The support assembly comprises a support frame (7) slidably arranged in a sliding protrusion (5) and a support plate (8) arranged on the support frame (7); the support frame (7) is fixedly connected to an adjustment slide plate (6); the adjustment member (4) rotates under the action of an external force to move the adjustment slide plate (6) upward or downward, thereby driving the support frame (7) to move upward or downward.

2. The foundation pit support structure of an existing building according to claim 1, characterized in that: The connecting rod (1) comprises a connecting crossbar (9) and a connecting vertical rod (10) arranged on the connecting crossbar (9); the connecting vertical rod (10) is provided with a connecting support rod (11) parallel to the connecting crossbar (9); and the connecting head (2) is respectively located at the end of the connecting crossbar (9), the connecting vertical rod (10), and the connecting support rod (11).

3. The foundation pit support structure of an existing building according to claim 2, characterized in that: A support screw (13) is provided on the inner wall of the support frame (3); a slide plate sleeve (14) is provided on the end of the support screw (13); and the sliding protrusion (5) is arranged on the slide plate sleeve (14).

4. The foundation pit support structure of an existing building according to claim 3, characterized in that: The support frame (3) is provided with a limiting screw (15), and the inner wall of the support frame (3) is provided with a sliding groove (16); the limiting screw (15) is provided with a supporting column (17) located in the sliding groove (16).

5. The foundation pit support structure of an existing building according to claim 4, characterized in that: The adjusting member (4) comprises an adjusting screw (401) rotatably arranged on a supporting column (17); and the adjusting slide plate (6) is arranged on the adjusting screw (401) via a thread.

6. The foundation pit support structure of an existing building according to claim 5, characterized in that: An inner stop convex strip (18) is provided on the side wall of the support frame (7); an inner groove (19) is provided on the side wall of the support plate (8), and the support plate (8) is slidably connected to the inner stop convex strip via the inner groove (19).

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