Building foundation pit supporting structure and construction method thereof

Abstract

The present application relates to the technical field of foundation pit support, especially to a house building foundation pit support structure and a construction method thereof.The present application realizes support protection of the connection place of the foundation pit and the ground by setting the bending assembly.Compared with single-sided protection, the support area of the L-shaped support is larger, and the effect on the soil structure stability of the connection place of the foundation pit and the ground is stronger.Through setting the abutment assembly at the bending place of the two plates of the bending assembly, the abutment assembly not only limits the moving range of the longitudinal plate inside and outside the soil through the trapezoidal plate, but also increases the support of the transverse plate to the longitudinal plate through the inclined plate.Meanwhile, the abutment assembly occupies a smaller space compared with the traditional rod support, and is not easy to displace due to external force, so that the whole structure has better stability and strength, is convenient to install and more accurate.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, and in particular to a foundation pit support structure for building construction and its construction method. Background Technology

[0002] Retaining slabs, as covering components in foundation pit support structures, are primarily used to cover exposed soil surfaces and prevent small soil fragments from peeling off and collapsing. Existing retaining slab systems, to ensure strength, mostly involve driving foundation piles into the foundation pit and then using metal rods, with one end abutting against the foundation pile and the other against the retaining slab. To guarantee support strength, the connection point between the metal rod and the retaining slab is often located above the middle of the retaining slab. This compresses the usable space within the foundation pit, and the metal rods are easily damaged by accident during later operations, leading to retaining slab failure. Furthermore, as the soil structure changes during use, the retaining slab may experience slight angular shifts, which can easily cause loosening and reduced support capacity with traditional support methods. Therefore, a new foundation pit support structure and its construction method are needed. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a building foundation pit support structure and its construction method, which has the advantages of convenient installation, good structural strength, quick disassembly, and strong adaptability.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a foundation pit support structure for building construction, comprising a bending component, a fixed pile, and an abutment component. The bending component includes a transverse plate and a longitudinal plate. A plurality of connecting strips I are equidistantly arranged on one side of the transverse plate, and a plurality of connecting strips II are equidistantly arranged on one side of the longitudinal plate. The end of the connecting strip I away from the transverse plate is rotatably connected to the end of the connecting strip II near the longitudinal plate. In use, the fixed pile passes through the transverse plate and fixes it to the bottom of the foundation pit. The abutment component includes an inclined plate and a trapezoidal plate. The inclined sides of a plurality of trapezoidal plates are connected to the inclined plate in parallel. When the longitudinal plate swings around the transverse plate, the trapezoidal plate is vertically inserted into the gap between adjacent connecting strips I along the direction of its parallel plane until one side of the inclined plate abuts against the side wall of the fixed pile.

[0005] Furthermore, a fulcrum assembly is provided on the other side of the transverse plate. The fulcrum assembly includes U-shaped members, and several of the U-shaped members are arranged in parallel with their openings facing the transverse plate, and one end of each U-shaped member is fixedly connected to the other side of the transverse plate.

[0006] Furthermore, the fulcrum assembly also includes a movable plate one and a movable plate two. One side of the movable plate one is rotatably connected to the bottom of the transverse plate, the other side of the movable plate one is rotatably connected to one side of the movable plate two, and the other side of the movable plate two is rotatably connected to the other end of the opening of the U-shaped piece.

[0007] Furthermore, the other side of the movable plate two is parallel to several connecting strips three, and the other end of the U-shaped component is rotatably connected to the connecting strips three. When the angle between the movable plate two and the U-shaped component is less than 180°, the other end of the U-shaped component can be movably inserted into the bottom of the foundation.

[0008] Furthermore, a roller is coaxially provided at the rotatable connection between the first movable plate and the second movable plate. The roller is circumferentially provided with several lifting plates along the axial direction. The fulcrum assembly also includes a loosening component, which includes a lever, a movable rod, and a spring sleeve. Several movable rods are equidistantly arranged on one side of the lever, and at least two spring sleeves are respectively fitted onto different movable rods. The side wall of the spring sleeve is fixedly connected to the second movable plate. The spring sleeve provides a pre-tightening force to the lever near the lifting plate through the movable rod, driving the roller to rotate so that the lifting plate moves the lever at fixed intervals.

[0009] Furthermore, a transition block that is wider on both sides and narrower in the middle is nested on the horizontal plate, and the fixing pile passes through the transition block and is inserted into the bottom of the foundation pit.

[0010] Furthermore, the inclined plate has a slot corresponding to the fixed pile on the side near the fixed pile.

[0011] Furthermore, the structure also includes an auxiliary fixing assembly, which includes a fixing plate, a barrier plate, and a support rod. Another fixing pile fixes the fixing plate to the ground around the foundation pit. The barrier plate is provided with several fixing grooves. One side of the fixing plate is provided with several rotating shafts that can be embedded in the fixing grooves. The rotating shafts are rotatably connected to the fixing grooves. One end of the support rod is rotatably connected to the top of the fixing plate. The top of the barrier plate is provided with a groove for placing the other end of the support rod. The depth of the groove gradually decreases from top to bottom.

[0012] Furthermore, the support has two struts, with a footrest between them.

[0013] Secondly, the present invention provides a construction method for a building foundation pit support structure, which, based on the above-mentioned building foundation pit support structure, specifically includes the following steps:

[0014] S1: Determine the distance between the bottom of the bent part and the pit based on the length of the horizontal plate, and then lean the bent part in the flattened state against the bottom of the pit. At this time, the fulcrum assembly is inserted into the bottom of the pit.

[0015] S2: Swing the longitudinal plate so that the connecting strip two is inserted into the bottom of the pit along the side wall of the pit. At this time, the longitudinal plate and the transverse plate are close to the side wall and bottom of the pit. Then, the fixing pile is inserted into the transverse plate for one fixation.

[0016] S3: Insert the abutment component into the gap between adjacent connecting strips until one end of the inclined plate abuts against the longitudinal plate and the other end abuts against the fixed pile;

[0017] S4: Make the barrier plate contact the top of the longitudinal plate to determine the position of the fixed plate. Then, fix the fixed plate around the pit with another fixed pile. Then, swing the strut to slide it in the groove to adjust the angle between the barrier plate and the fixed plate until the strut can no longer swing.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] 1. This invention achieves support and protection at the junction of the foundation pit and the ground by setting up a bending component. Compared with single-sided protection, the L-shaped support area is larger and has a stronger effect on the stability of the soil structure at the junction of the foundation pit and the ground. By setting abutment components at the bending points of the two plates of the bending component, the abutment components not only limit the range of movement of the longitudinal plate inside and outside the soil through the trapezoidal plate, but also increase the support of the transverse plate for the longitudinal plate through the inclined plate. At the same time, the abutment components occupy less space than traditional rod supports and are less prone to displacement due to external forces. The overall structure has better stability and strength, and is easier and more precise to install.

[0020] 2. This invention, by setting up a support component, utilizes the bend of the U-shaped part as the contact point between the bottom of the bending component and the bottom of the foundation pit. This ensures the strength of the temporary support point between the support structure and the bottom of the foundation pit during installation, while also allowing the temporary support point to move as the structure is adjusted. By setting up movable plates one and two in conjunction with the characteristics of the transverse plate during installation, soil is filled into the space between the two movable plates as the transverse plate moves away from the sidewall of the foundation pit, increasing the grip of the transverse plate after its final position is determined. Simultaneously, a loosening component is provided to loosen the soil within movable plates one and two during dismantling, facilitating subsequent removal.

[0021] 3. By setting auxiliary fixing parts, the longitudinal plate is helped to fit against the side wall of the foundation pit. At the same time, the angle between the fixing plate and the barrier plate is adjusted by using struts, which facilitates the adaptive adjustment of the longitudinal plate to the soil loosening in the later stage.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0023] Undoubtedly, such and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.

[0024] To make the above and other objects, features and advantages of the present invention more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0026] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of a building foundation pit support structure according to the present invention;

[0029] Figure 2 This is a side view of a building foundation pit support structure according to the present invention;

[0030] Figure 3 This is a schematic diagram of a bent component structure for a building foundation pit support structure according to the present invention;

[0031] Figure 4 This is a schematic diagram of the transverse plate of a building foundation pit support structure according to the present invention from one perspective.

[0032] Figure 5 This is a side view of the support component of a building foundation pit support structure according to the present invention;

[0033] Figure 6 This is a partial sectional view of the support component of a building foundation pit support structure according to the present invention;

[0034] Figure 7 This is a schematic diagram of the abutment component structure of a building foundation pit support structure according to the present invention;

[0035] Figure 8 This is a structural separation diagram of the auxiliary fixing component of a building foundation pit support structure according to the present invention;

[0036] Figure 9 This is a schematic diagram of the transition block structure of a building foundation pit support structure according to the present invention.

[0037] Explanation of key figure labels:

[0038] 1- Bending component;

[0039] 11-Horizontal plate; 12-Vertical plate; 111-Connecting strip one; 121-Connecting strip two;

[0040] 2-Fixed piles;

[0041] 3-Abutment components;

[0042] 31-Inclined plate; 311-Slotted; 32-Trapezoidal plate;

[0043] 4-Pivot Components;

[0044] 41-U-shaped part; 42-Modible plate one; 43-Modible plate two; 431-Connecting strip three; 44-Roller; 441-Holding plate; 45-Loosening part; 451-Pulley plate; 452-Lever rod; 453-Elastic sleeve;

[0045] 5-Transition block;

[0046] 6-Auxiliary fixing components;

[0047] 61-Fixing plate; 611-Rotating shaft; 622-Groove; 62-Baffle plate; 621-Fixing groove; 63-Support rod; 64-Pedal. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0049] Reference Figure 1-9 In a first aspect, the present invention provides a building foundation pit support structure, including a bending component 1, a fixing pile 2, an abutment component 3, and an auxiliary fixing component 6.

[0050] The bending assembly 1 includes a transverse plate 11 and a longitudinal plate 12. A plurality of connecting strips 111 are equidistantly arranged on one side of the transverse plate 11, and a plurality of connecting strips 121 are equidistantly arranged on one side of the longitudinal plate 12. The end of each connecting strip 111 away from the transverse plate 11 is rotatably connected to the end of each connecting strip 121 near the longitudinal plate 12. In use, the fixing pile 2 passes through the transverse plate 11 and fixes it to the bottom of the pit. To prevent the transverse plate 11 from shifting vertically due to unevenness at the bottom of the pit, a transition block 5, wider at both sides and narrower in the middle, is nested on the transverse plate 11. The narrower middle structure provides deformation space for slight vertical changes in the transverse plate 11. The fixing pile 2 passes through the transition block 5 and is inserted into the bottom of the pit. The abutment component 3 includes an inclined plate 31 and a trapezoidal plate 32. The trapezoidal plate 32 is an isosceles trapezoid. One inclined side of several trapezoidal plates 32 is connected to the inclined plate 31 in parallel. When the longitudinal plate 12 swings around the transverse plate 11, the trapezoidal plate 32 is vertically inserted into the gap between adjacent connecting strips 111 along the direction of its parallel plane until one side of the inclined plate 31 abuts against the side wall of the fixed pile 2. To increase the abutment strength of the inclined plate 31, the inclined plate 31 is provided with a slot 311 corresponding to the fixed pile 2 on the side near the fixed pile 2. If necessary, an extension for bolt fixing is provided on the other side of the inclined plate 31, so that the inclined plate 31 is fixedly connected to the longitudinal plate 12 after positioning.

[0051] Because the bending component 1 is laid out and leans against the pit during installation, a support component 4 is provided on the other side of the transverse plate 11 to increase the friction between its bottom and the bottom of the pit. The support component 4 includes a U-shaped component 41, and several U-shaped components 41 are arranged parallel to each other with their openings facing the transverse plate 11, and one end of each U-shaped component 41 is fixedly connected to the other side of the transverse plate 11, so that the bent part of the U-shaped component 41 contacts the bottom of the pit. This ensures the temporary support force between the transverse plate 11 and the pit while also ensuring the mobility of the transverse plate 11. To further increase the grip of the transverse plate 11, the support component 4 also includes a first movable plate 42 and a second movable plate 43. One side of the first movable plate 42 is rotatably connected to the bottom of the transverse plate 11, and the other side of the first movable plate 42 is rotatably connected to one side of the second movable plate 43. The other side of the second movable plate 43 is rotatably connected to the other end of the opening of the U-shaped component 41. During the installation of the support structure, the movable plate swings towards the transverse plate 11 due to the reaction force of the soil. After the abutment component 3 is inserted, because the transverse plate 11 moved excessively during the installation of the longitudinal plate 12, the transverse plate 11 will reset along the bottom of the pit in the opposite direction of its side wall. At this time, the space formed by the movable plate 42 and the movable plate and the transverse plate 11 can be filled with soil, increasing the grip of the edge of the transverse plate 11 and preventing it from tilting up and leaving a safety hazard. To increase the force of the fulcrum and allow the U-shaped part 41 to penetrate further, several connecting strips 431 are arranged parallel to each other on the other side of the movable plate 43. The other end of the U-shaped part 41 is rotatably connected to the connecting strips 431. When the angle between the movable plate 43 and the U-shaped part 41 is less than 180°, the other end of the U-shaped part 41 can be movably inserted into the bottom of the foundation. To achieve rapid disassembly of the bending assembly 1, a roller 44 is coaxially provided at the rotational connection between the first movable plate 42 and the second movable plate 43. The roller 44 is axially arranged with several lifting plates 441. The fulcrum assembly 4 also includes a loosening member 45, which includes a lever 451, a movable rod 452, and an elastic sleeve 453. Several movable rods 452 are equidistantly arranged on one side of the lever 451. At least two elastic sleeves 453 are respectively fitted onto different movable rods 452. The side wall of the elastic sleeve 453 is fixedly connected to the second movable plate 43. The elastic sleeve 453 provides a preload force to the lever 451 near the lifting plate 441 through the movable rod 452, driving the roller 44 to rotate so that the lifting plate 441 moves the lever 451 at fixed intervals. The drive roller 44 rotates, and the rotation method can be that a motor is installed inside the roller 44, causing the pick plate 441 to move the pick plate 451 at the same time intervals, so that the movable rod 452 moves back and forth along the elastic sleeve 453, thereby loosening the soil in the movable plate space and reducing the grip of the transverse plate 11.

[0052] To increase the fit between the longitudinal plate 12 and the sidewall of the foundation pit, an auxiliary fixing assembly 6 is provided. This auxiliary fixing assembly 6 includes a fixing plate 61, a baffle plate 62, and a support rod 63. Another fixing pile 2 fixes the fixing plate 61 to the ground around the foundation pit. The baffle plate 62 has several fixing grooves 621. One side of the fixing plate 61 has several rotating shafts 611 that can be embedded in the fixing grooves 621. The rotating shafts 611 are rotatably connected to the fixing grooves 621, which increases the connection strength of the rotatable connection. One end of the support rod 63 is rotatably connected to the top of the fixing plate 61. The top of the baffle plate 62 has a groove 622 for placing the other end of the support rod 63. The groove 622 gradually decreases in depth from top to bottom. The angle between the baffle plate 62 and the fixing plate 61 can be adjusted by sliding the support rod 63 in the groove 622. To achieve adaptive adjustment of the structure, there are two support rods 63, and a footplate 64 is provided between the two support rods 63. In daily use, the longitudinal plate 12 can be reinforced by stepping on the pedal 64 to ensure proper contact between the plate and the pit sidewall.

[0053] On the other hand, the present invention provides a construction method for a building foundation pit support structure, which, based on the above-mentioned building foundation pit support structure, specifically includes the following steps:

[0054] S1: Determine the distance between the bottom of the bent part and the pit based on the length of the transverse plate 11, and then lean the bent part in the flattened state against the bottom of the pit. At this time, the fulcrum assembly 4 is inserted into the bottom of the pit.

[0055] S2: Swing the longitudinal plate 12 so that the connecting strip 121 is inserted into the bottom of the pit along the side wall of the pit. At this time, the longitudinal plate 12 and the transverse plate 11 are close to the side wall and bottom of the pit. Then, the fixing pile 2 is inserted into the transverse plate 11 for fixing.

[0056] S3: Insert the abutting component 3 into the gap between the adjacent connecting strips 111 until one end of the inclined plate 31 abuts against the longitudinal plate 12 and the other end abuts against the fixing pile 2, thereby achieving secondary fixing of the longitudinal plate 12 and the transverse plate 11.

[0057] S4: Make the barrier plate 62 contact the top of the longitudinal plate 12 to determine the position of the fixed plate 61. Make another fixed pile 2 to fix the fixed plate 61 around the foundation pit. Then swing the support rod 63 to slide in the groove 622 to adjust the angle between the barrier plate 62 and the fixed plate 61 until the support rod 63 can no longer swing.

[0058] S5: After use, the support structure needs to be dismantled. After removing all the fixed piles 2, drive the roller 44 to rotate and loosen the soil on the other side of the transverse plate 11. Then remove the abutment component 3 and pull out the longitudinal plate 12.

[0059] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0060] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0061] Furthermore, the described features or characteristics can be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented without the aforementioned specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A building foundation pit supporting structure, characterized by, The utility model provides a kind of foundation pit support structure, including bending component, fixed pile and abutment component, the bending component includes transverse plate and longitudinal plate, one side of the transverse plate is equidistantly provided with several connecting strips one, one side of the longitudinal plate is equidistantly provided with several connecting strips two;The end of the connecting strip one away from the transverse plate is rotatably connected with the end of the connecting strip two close to the longitudinal plate, when using, the fixed pile passes through the transverse plate and is fixed at the bottom of foundation pit;The abutment component includes inclined plate and trapezoidal plate, the inclined edge of several trapezoidal plates is parallelly connected with the inclined plate, when longitudinal plate swings around transverse plate, the trapezoidal plate is vertically inserted into the gap between adjacent connecting strips one along the direction of parallel surface until one side of the inclined plate is abutted with the side wall of the fixed pile; The other side of the transverse plate is provided with fulcrum component, the fulcrum component includes U-shaped piece, several U-shaped pieces are parallelly arranged with opening towards the transverse plate and one end is fixedly connected with the other side of the transverse plate.

2. The building foundation pit support structure according to claim 1, characterized in that, The fulcrum component further includes movable plate one and movable plate two, one side of the movable plate one is rotatably connected with the bottom of the transverse plate, the other side of the movable plate one is rotatably connected with one side of the movable plate two, the other side of the movable plate two is rotatably connected with the other end of the opening of the U-shaped piece.

3. The building foundation pit support structure according to claim 2, characterized in that, The other side of the movable plate two is parallelly provided with several connecting strips three, the other end of the U-shaped piece is crossly rotatably connected with the connecting strips three, when the included angle between the movable plate two and the U-shaped piece is less than 180°, the other end of the U-shaped piece can be movably inserted into the bottom of foundation.

4. The building foundation pit support structure according to claim 3, characterized in that, The rotatable connection between the movable plate one and the movable plate two is coaxially provided with roller, the roller is annularly provided with several pick plates along axial direction, the fulcrum component further includes loosening piece, the loosening piece includes push plate, movable rod and elastic sleeve, several movable rods are equidistantly provided on one side of the push plate, at least two elastic sleeves are respectively sleeved on different movable rods, the side wall of the elastic sleeve is fixedly connected with the movable plate two, the elastic sleeve gives the push plate pre-tightening force close to the pick plate through the movable rod, drives the roller to rotate so that the pick plate drives the push plate to move at interval fixed time.

5. The building foundation pit support structure according to claim 4, characterized in that, The transverse plate is nested with transition block with wide two sides and narrow middle, the fixed pile is inserted into the bottom of foundation through the transition block.

6. The building foundation pit support structure according to claim 5, wherein The inclined plate is provided with slot corresponding to the fixed pile on one side close to the fixed pile.

7. The building foundation pit support structure according to claim 6, characterized by, Further including auxiliary fixing component, the auxiliary fixing component includes fixed plate, barrier plate and support rod, another fixed pile is fixed on the ground around foundation pit, the barrier plate is provided with several fixing grooves, one side of the fixed plate is provided with several rotating shaft parts which can be embedded in the fixing grooves, the rotating shaft parts are rotatably connected with the fixing grooves, one end of the support rod is rotatably connected with the top of the fixed plate, the top of the barrier plate is provided with recess for placing the other end of the support rod, the depth of the recess gradually decreases from top to bottom.

8. The building foundation pit support structure according to claim 7, characterized in that, The support rod has two, and a stepping plate is arranged between the two support rods.

9. A construction method of a building foundation pit support structure, based on the building foundation pit support structure according to claim 8, characterized by, Specifically comprising the following steps: S1: according to the length of transverse plate, the distance between the bottom of bending piece and foundation pit is determined, then the bending piece in flat state is inclined on the bottom of foundation pit, at this time, the fulcrum component is inserted into the bottom of foundation pit; S2: swing longitudinal plate so that connecting strip two is inserted into the bottom of foundation pit along the side wall of foundation pit, at this time, longitudinal plate and transverse plate are close to the side wall and bottom surface of foundation pit, then make the fixed pile inserted into the transverse plate for once fixation. S3: let the abutment assembly inserted into the gap between the adjacent connecting strip, until the end of the inclined plate with longitudinal plate abutment, the other end with the fixed pile abutment; S4: let the baffle plate and longitudinal plate top contact and determine the position of the fixed plate, let the other fixed pile will be fixed plate fixed around the foundation pit, then swing the support rod to make it slide in the groove to adjust the angle between the baffle plate and the fixed plate until the support rod can't further swing.

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