A temporary support mechanism for building foundation pit after excavation

Abstract

The utility model relates to the field of building construction technology, concretely is a kind of temporary support mechanism for building foundation pit after excavation, including guard frame and trapezoidal block, the top center of guard frame is fixed with trapezoidal block, the right wall bottom side of guard frame is equipped with storage slot, counterweight is installed in storage slot, L-shaped clamping block and T-shaped clamping block are respectively fixed on the upper side of the front and back wall of guard frame, the lower side of the front and back wall of guard frame is respectively equipped with support, rotatable support rod is equipped in support, the bottom of guard frame is fixed with trapezoidal clamping block, counterweight includes inverted trapezoidal box, rotating part and sawtooth plate, inverted trapezoidal box bottom side is reversed by rotating part, inverted trapezoidal box can store soil etc. and improve counterweight to improve the stability of device, the angle of guard frame can be adjusted by support rod to better adhere to the side of foundation pit to reduce the risk of collapse to improve safety.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a temporary support mechanism for building foundation pit excavation. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the foundation elevation and foundation plane dimensions. Excavation pit support is a set of measures to support, reinforce and protect the sidewalls and surrounding environment of the excavation pit in order to ensure the safety of underground structure construction and the surrounding environment.

[0003] For example, CN219690534U discloses a foundation pit support mechanism for building construction, including a base. A first baffle is fixedly connected to the upper surface of the base. The first baffle has two symmetrical first sliding grooves inside. Each of the first sliding grooves is provided with a limit rod. A slider is slidably connected to the outer wall of each limit rod. The outer wall of the slider is slidably connected to the inner wall of the first sliding groove. A lifting plate is fixedly connected to the outer wall of the slider. A nut is threaded into the inside of the lifting plate. In this invention, the slider slides along the inner wall of the first groove through the outer wall of the limiting rod, driving the lifting plate to move upward. Then, the nut is rotated to enter the interior of the fixing screw hole, achieving the effect of the foundation pit support device being able to quickly adjust and raise according to the depth of the foundation pit. This solves the problem of inconvenience in supporting foundation pits of different depths and greatly improves practicality. However, in use, because some foundation pit protection time is short, and the existing device is time-consuming to adjust, it cannot meet the efficiency of temporary use. During the excavation of the foundation pit, the foundation pit inside the protection device is prone to collapse due to the different curvature of the foundation pit, which poses a safety hazard and is also difficult to retrieve. Therefore, it is urgent to design a temporary support mechanism for building foundation pits after excavation to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a temporary support mechanism for building foundation pit excavation, in order to solve the problems mentioned in the background art, such as the time-consuming adjustment of existing devices, which cannot meet the efficiency of temporary use, the easy collapse of the foundation pit within the protective device due to the different curvature of the foundation pit during excavation, which poses safety hazards, and the difficulty in collection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temporary support mechanism for excavation of a building foundation pit, comprising a protective frame and a trapezoidal block. The trapezoidal block is fixed at the center of the top of the protective frame. A storage groove is opened on the bottom right wall of the protective frame, and a counterweight is installed in the storage groove. L-shaped and T-shaped locking blocks are fixed on the upper sides of the front and rear walls of the protective frame, respectively. Support members are installed on the lower sides of the front and rear walls of the protective frame, and a rotatable support rod is provided in the support member. A trapezoidal locking block is fixed at the bottom of the protective frame. The counterweight includes an inverted trapezoidal box, a rotating component, and a serrated plate. The bottom side of the inverted trapezoidal box is flipped by the rotating component. Serrated plates are fixed on both the front and rear walls of the inverted trapezoidal box. The support rod achieves different angle limits by being locked at different positions on the serrated plate.

[0006] Preferably, the bottom end of the protective frame is provided with lower connecting holes at both the front and rear. The lower connecting holes facilitate the storage of the support rod, and the L-shaped and T-shaped locking blocks are interlocked.

[0007] Preferably, the L-shaped card block has a right circular hole on the right side of its top end, and the T-shaped card block has a left circular hole on its left end. The right circular hole and the left circular hole are connected by an upper limit pin.

[0008] Preferably, the top end of the support rod is inserted into the bottom side of the rotating block, the rotating block is installed at the center of the front and rear walls of the protective frame, the bottom end of the support rod has an inclined surface, the bottom side of the support rod has a through hole, a lower limit pin is inserted into the through hole, and the inner side of the lower limit pin is inserted into the lower connecting hole.

[0009] Preferably, the inverted trapezoidal box has a through oblique opening on its inner side and a discharge port on its top.

[0010] Preferably, the rotating component includes a crossbar and a fixed rod. The crossbar is fixed to the top left side of the inverted trapezoidal box, and the fixed rod is fixed to the center of the crossbar. Side blocks are inserted into the front and rear ends of the fixed rod, and the two sets of side blocks are fixed to the side wall of the storage slot.

[0011] Preferably, the trapezoidal card block has a trapezoidal groove inside its bottom end, and a trapezoidal block can be fitted into the trapezoidal groove. The trapezoidal card block is perpendicular to the trapezoidal block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This is a temporary support mechanism for building foundation pit excavation. It can store soil and other materials in an inverted trapezoidal box to increase the counterweight and thus improve the stability of the device. The angle of the protective frame can be adjusted by the support rod to better fit the side of the foundation pit, thereby reducing the risk of collapse and improving safety.

[0014] This is a temporary support mechanism for building foundation pit excavation. The storage slot and lower connection hole in the protective frame facilitate storage of the device when not in use, saving space and making it convenient and quick. The trapezoidal clips and trapezoidal blocks fixed at the upper and lower ends of the protective frame facilitate vertical assembly, improving its applicability to foundation pits of different depths and providing versatility for the device. Attached Figure Description

[0015] Figure 1 This is a side view of the storage design of this utility model;

[0016] Figure 2 This is a front view of the unfolded part of this utility model;

[0017] Figure 3 This is a frontal, bottom-view schematic diagram of the present invention;

[0018] Figure 4 This is a top side view of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the counterweight component of this utility model.

[0020] In the diagram: 1. Protective frame; 11. Storage slot; 12. Lower connecting hole; 13. L-shaped locking block; 131. Right round hole; 132. Upper limit pin; 14. T-shaped locking block; 141. Left round hole; 2. Trapezoidal block; 3. Support component; 31. Rotating block; 32. Support rod; 321. Inclined surface; 322. Through hole; 323. Lower limit pin; 4. Counterweight; 41. Inverted trapezoidal box; 411. Through inclined opening; 412. Discharge port; 42. Rotating component; 421. Crossbar; 422. Fixing rod; 423. Side block; 43. Serrated plate; 5. Trapezoidal locking block; 51. Trapezoidal groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 One embodiment provided by this utility model:

[0023] A temporary support mechanism for excavating a building foundation pit includes a protective frame 1 and a trapezoidal block 2. The trapezoidal block 2 is fixed at the center of the top of the protective frame 1. A storage groove 11 is opened on the bottom side of the right wall of the protective frame 1. A counterweight 4 is installed in the storage groove 11. L-shaped blocks 13 and T-shaped blocks 14 are fixed on the upper sides of the front and rear walls of the protective frame 1, respectively. Support members 3 are installed on the lower sides of the front and rear walls of the protective frame 1, respectively. A rotatable support rod 32 is provided in the support member 3. A trapezoidal block 5 is fixed at the bottom of the protective frame 1. The counterweight 4 includes an inverted trapezoidal box 41, a rotating member 42, and a serrated plate 43. The bottom side of the inverted trapezoidal box 41 is flipped by the rotating member 42. The front and rear walls of the inverted trapezoidal box 41 are both fixed with serrated plates 43. The support rod 32 achieves different angle limits by being locked at different positions on the serrated plate 43.

[0024] As a further feature of this utility model, the bottom end of the protective frame 1 is provided with lower connecting holes 12 at both the front and rear. The lower connecting holes 12 facilitate the storage of the support rod 32. The L-shaped locking block 13 and the T-shaped locking block 14 are interlocked. The right side of the top of the L-shaped locking block 13 is provided with a right round hole 131, and the left end of the T-shaped locking block 14 is provided with a left round hole 141. The right round hole 131 and the left round hole 141 are connected by an upper limit pin 132 at their center, which is beneficial for storage when not in use, saving space and making it convenient and quick.

[0025] Furthermore, the top of the support rod 32 is inserted into the bottom side of the rotating block 31. The rotating block 31 is installed at the center of the front and rear walls of the protective frame 1. The bottom end of the support rod 32 has an inclined surface 321, and the bottom side of the support rod 32 has a through hole 322. A lower limit pin 323 is inserted into the through hole 322. The inner side of the lower limit pin 323 is inserted into the lower connecting hole 12, which facilitates angle adjustment and improves the applicability of the device.

[0026] As a further improvement of this utility model, the inner side of the inverted trapezoidal box 41 is provided with a through oblique opening 411, and the top of the inverted trapezoidal box 41 is provided with a discharge port 412. The rotating component 42 includes a crossbar 421 and a fixed rod 422. The crossbar 421 is fixed on the left side of the top of the inverted trapezoidal box 41, and the fixed rod 422 is fixed in the center of the crossbar 421. Side blocks 423 are inserted at both the front and rear ends of the fixed rod 422. The two sets of side blocks 423 are fixed on the side wall of the storage groove 11, which is beneficial for storing soil and other materials, increasing the counterweight, and thus improving the stability of the device.

[0027] Furthermore, the bottom of the trapezoidal card block 5 has a trapezoidal groove 51, into which the trapezoidal block 2 can be fitted. The trapezoidal card block 5 is perpendicular to the trapezoidal block 2, which facilitates the installation and use of pits of different heights for protection and improves applicability.

[0028] Working principle: In use, the user first places the entire protective frame 1 on the side of the pit, then pulls the inverted trapezoidal box 41 to rotate to the side. The inverted trapezoidal box 41 rotates and flips within the side block 423 through the fixing rod 422 at the center of the horizontal bar 421 on the left wall, until the right wall of the inverted trapezoidal box 41 is parallel to the ground of the pit. Then, pull open the lower limit pin 323 at the center of the through hole 322 on the bottom side of the support rod 32 to separate it from the lower connecting hole 12 on the bottom side of the protective frame 1. The support rod 32 rotates through the rotating block 31 at the top to the top side of the serrated plate 43 fixed on the front and rear walls of the inverted trapezoidal box 41, and then the bottom inclined surface 321 of the support rod 32 is locked in the center of the serrated plate 43 to complete the fixation. When the left and right sets of protective frames 1 need to be connected, the right round hole 131 and the left round hole 141 of the corresponding L-shaped block 13 and T-shaped block 14 are aligned and then connected using the upper limit pin 132. When the foundation pit is high, it is only necessary to fit the trapezoidal groove 51 of the trapezoidal card block 5 on the bottom side of the other set of protective frame 1 into the trapezoidal block 2 at the top of the other set of protective frame 1. The above is the entire working principle of this utility model.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temporary support mechanism for excavation of a building foundation pit, comprising a protective frame (1) and a trapezoidal block (2), wherein the trapezoidal block (2) is fixedly disposed at the center of the top of the protective frame (1), characterized in that: The protective frame (1) has a storage slot (11) on the bottom right wall. A counterweight (4) is installed in the storage slot (11). An L-shaped block (13) and a T-shaped block (14) are fixed on the upper front and rear walls of the protective frame (1). A support (3) is installed on the lower front and rear walls of the protective frame (1). A rotatable support rod (32) is provided in the support (3). A trapezoidal block (5) is fixed at the bottom of the protective frame (1). The counterweight (4) includes an inverted trapezoidal box (41), a rotating part (42), and a serrated plate (43). The bottom of the inverted trapezoidal box (41) is flipped by the rotating part (42). A serrated plate (43) is fixed on both the front and rear walls of the inverted trapezoidal box (41). The support rod (32) is locked at different positions on the serrated plate (43) to achieve different angle limits.

2. The temporary support mechanism for building foundation pit excavation according to claim 1, characterized in that: The protective frame (1) has lower connecting holes (12) at both the front and rear of its bottom end. The lower connecting holes (12) facilitate the storage of the support rod (32). The L-shaped card block (13) and the T-shaped card block (14) fit together.

3. A temporary support mechanism for building foundation pit excavation according to claim 1, characterized in that: The L-shaped card block (13) has a right circular hole (131) on the right side of its top end, and the T-shaped card block (14) has a left circular hole (141) on its left end. The right circular hole (131) and the left circular hole (141) are connected by an upper limit pin (132) at their center.

4. A temporary support mechanism for building foundation pit excavation according to claim 1, characterized in that: The top end of the support rod (32) is inserted into the bottom side of the rotating block (31). The rotating block (31) is installed at the center of the front and rear walls of the protective frame (1). The bottom end of the support rod (32) has an inclined surface (321). The bottom side of the support rod (32) has a through hole (322). A lower limit pin (323) is inserted into the through hole (322). The inner side of the lower limit pin (323) is inserted into the lower connecting hole (12).

5. A temporary support mechanism for building foundation pit excavation according to claim 1, characterized in that: The inverted trapezoidal box (41) has a through oblique opening (411) on its inner side, and a discharge port (412) is provided at the top of the inverted trapezoidal box (41).

6. A temporary support mechanism for building foundation pit excavation according to claim 1, characterized in that: The rotating component (42) includes a crossbar (421) and a fixed rod (422). The crossbar (421) is fixed on the top left side of the inverted trapezoidal box (41). The fixed rod (422) is fixed at the center of the crossbar (421). Side blocks (423) are inserted at both the front and rear ends of the fixed rod (422). The two sets of side blocks (423) are fixed on the side wall of the storage groove (11).

7. A temporary support mechanism for building foundation pit excavation according to claim 1, characterized in that: The trapezoidal card block (5) has a trapezoidal groove (51) inside its bottom end. The trapezoidal block (2) can be fitted into the trapezoidal groove (51). The trapezoidal card block (5) is perpendicular to the trapezoidal block (2).

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