Large-span supporting end mechanism of foundation pit

Abstract

The utility model relates to the field of foundation pit supporting equipment, in particular to a large-span supporting end mechanism for a foundation pit. The supporting mechanism comprises a center end part, outer end parts, relay end parts, end part connecting cross beams and steel strands, the two symmetrical outer end parts are arranged on the left side and the right side of the center end part respectively, the two symmetrical relay end parts are distributed on the left side and the right side of the center end part, the relay end parts are located between the center end part and the outer end parts, and the end part connecting cross beams are arranged on the end part connecting cross beams. An end connecting cross beam is fixed between the center end and the outer end, an end connecting cross beam is fixed between the outer end and the relay end, and a steel strand penetrates through the end connecting cross beams, the center end, the outer end and the relay end. According to the utility model, the central end part is arranged in the middle, the outer end parts and the relay end parts are symmetrically arranged on the two sides, the end parts are connected through the end part connecting cross beams, and the steel strands penetrate through the end parts. According to the structure, the bending moment of the steel strand is reduced, direction guide is provided for the steel strand, and the stability of the supporting mechanism is improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support equipment, and in particular to the end mechanism of large-span foundation pit support. Background Technology

[0002] The fish-belly type steel support used in current foundation pit engineering has multi-layered arrayed steel strands on the upper part of the vertical beams. After the multi-layered arrayed steel strands are prestressed, they will generate a very large bending moment, which poses a safety hazard. At present, the ends of the multi-layered curved plate steel strands lack guidance, making the steel strands difficult to construct. Utility Model Content

[0003] The technical problem this invention aims to solve is as follows: To address the technical problems described in the background art, this invention provides a large-span support end mechanism for foundation pits. This mechanism connects the ends via a central end, two symmetrical outer ends, and intermediate ends, all connected by end-connecting beams, through which steel strands pass. This structure reduces the bending moment of the steel strands, provides directional guidance for the steel strands, and improves the stability of the support mechanism.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A large-span support end mechanism for foundation pits includes a central end, an outer end, a relay end, an end connecting beam, and steel strands. The central end has two mutually symmetrical outer ends on its left and right sides, and two mutually symmetrical relay ends are distributed on the left and right sides of the central end. The relay ends are located between the central end and the outer ends. An end connecting beam is fixed between the central end and the outer ends, and an end connecting beam is fixed between the outer ends and the relay ends. The steel strands pass through the end connecting beam, the central end, the outer ends, and the relay ends.

[0006] Specifically, the central end includes a frame, a side plate, a guide tube, and an arc plate. Two symmetrical side plates are fixed on the left and right sides of the frame. The two side plates are arranged in a figure-eight shape. Several holes for passing through steel strands are distributed on the side plates. Several guide tubes are distributed inside the frame. The steel strands pass through the guide tubes. Several arc plates are fixed inside the frame from top to bottom.

[0007] Specifically, the relay end includes a frame two, a side plate two, a guide tube two, and an arc plate two. Two side plates two are fixed on the left and right sides of the frame two, and adjacent side plates two are parallel to side plate one. Several through holes for passing through steel strands are distributed on the side plates two. Several guide tubes two are distributed inside the frame two, and steel strands pass through the guide tubes two. Several arc plates two are fixed in sequence from top to bottom inside the frame two.

[0008] Specifically, the outer end includes a frame three, a side plate three, a guide tube three, and an arc plate three. The inner side of the frame three is fixed with a side plate three. Several through holes for passing through steel strands are distributed on the side plate three. Adjacent side plates three and side plates two are parallel to each other. Several guide tubes three are distributed inside the frame three. Several arc plates three are fixed from top to bottom inside the frame three.

[0009] Specifically, the end connecting beam includes an H-beam and a perforated plate. The H-beam is fixed with perforated plates at both ends, and the perforated plates have several holes for passing through the steel strands.

[0010] Specifically, the steel strands between the central end and the relay end are perpendicular to the frame one and side plate two at both ends of the steel strand section, respectively, and the steel strands between the outer end and the relay end are perpendicular to the side plate two and side plate three at both ends of the steel strand section, respectively.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a large-span support end mechanism for foundation pits. It connects the ends via a central end, two symmetrical outer ends, and intermediate ends, all connected by end-connecting beams, through which the steel strands pass. This structure reduces the bending moment of the steel strands, provides directional guidance for the steel strands, and improves the stability of the support mechanism. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the central end of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the relay end of this utility model;

[0016] Figure 4 This is a schematic diagram of the outer end of the present invention;

[0017] Figure 5 This is a schematic diagram of the end connecting crossbeam of this utility model;

[0018] In the diagram: 1. Central end, 2. Outer end, 3. Relay end, 4. End connecting beam, 11. Frame 1.

[0019] 12. Side panel one, 13. Guide tube one, 14. Arc-shaped plate one, 21. Frame three, 22. Side panel three, 23.

[0020] 24. Guide tube 3, 31. Arc plate 3, 32. Frame 2, 33. Side plate 2, 34. Guide tube 2, 45. Arc plate 2, 46. H-beam, 47. Perforated plate. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the central end of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the relay end of this utility model; Figure 4 This is a schematic diagram of the outer end of the present invention; Figure 5 This is a schematic diagram of the end connecting crossbeam of this utility model.

[0024] As attached Figure 1 As shown, a large-span support end mechanism for foundation pits includes a central end 1, an outer end 2, a relay end 3, an end connecting beam 4, and steel strands. The central end 1 has two mutually symmetrical outer ends 2 on its left and right sides, and two mutually symmetrical relay ends 3 are distributed on the left and right sides of the central end 1. The relay ends 3 are located between the central end 1 and the outer ends 2. An end connecting beam 4 is fixed between the central end 1 and the outer ends 2, and an end connecting beam 4 is fixed between the outer ends 2 and the relay ends 3. The steel strands pass through the end connecting beam 4, the central end 1, the outer ends 2, and the relay ends 3.

[0025] At the bottom of the central end 1, outer end 2, and relay end 3, pressure-adjusting vertical rods are fixed respectively. Both ends of the steel strand are fixed to two anchors, and both the anchors and pressure rods are fixed to the waler of the foundation pit. Then, jacks push the pressure-adjusting vertical rods towards the steel strand, thereby tensioning the steel strand. The reaction force of the steel strand provides support to the waler.

[0026] As attached Figure 2 As shown, the central end 1 includes a frame 11, side plates 12, guide tubes 13, and arc-shaped plates 14. Two symmetrical side plates 12 are fixed on the left and right sides of the frame 11. The two side plates 12 are arranged in a figure-eight shape. Several through holes for passing through steel strands are distributed on the side plates 12. Several guide tubes 13 are distributed inside the frame 11. The steel strands pass through the guide tubes 13. Several arc-shaped plates 14 are fixed inside the frame 11 from top to bottom.

[0027] The two symmetrical side plates 12 correspond to the two symmetrical outer ends 4 and intermediate ends 5, respectively, thus forming a uniform stress structure.

[0028] As attached Figure 3As shown, the relay end 3 includes a frame 31, side plates 32, guide tubes 33, and arc-shaped plates 34. Two side plates 32 are fixed on the left and right sides of the frame 31 respectively. The adjacent side plates 32 are parallel to the side plates 12. Several holes for passing through steel strands are distributed on the side plates 32. Several guide tubes 33 are distributed inside the frame 31. The steel strands pass through the guide tubes 33. Several arc-shaped plates 34 are fixed inside the frame 31 from top to bottom.

[0029] The two end beams 4 located on one side of the central end 1 form a V-shape. The two symmetrical V-shapes on the left and right sides form an arch structure.

[0030] As attached Figure 4 As shown, the outer end 2 includes a frame 3 21, a side plate 3 22, a guide tube 3 23, and an arc plate 3 24. The inner side of the frame 3 21 is fixed with a side plate 3 22. Several through holes for passing through steel strands are distributed on the side plate 3 22. Adjacent side plates 3 22 and side plates 2 32 are parallel to each other. Several guide tubes 3 23 are distributed inside the frame 3 21. Several arc plates 3 24 are fixed inside the frame 3 21 from top to bottom.

[0031] As attached Figure 5 As shown, the end connecting beam 4 includes an H-beam 41 and a perforated plate 42. The perforated plate 42 is fixed at both ends of the H-beam 41, and several holes for passing through the steel strand are distributed on the perforated plate 42.

[0032] The portion of the steel strand between the central end 1 and the relay end 3 is perpendicular to the frame 11 and side plate 22 at both ends of this portion of the steel strand, respectively. The portion of the steel strand between the outer end 2 and the relay end 3 is perpendicular to the side plate 22 and side plate 32 at both ends of this portion of the steel strand, respectively.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A large-span support end mechanism for foundation pits, characterized in that, It includes a central end (1), an outer end (2), a relay end (3), an end connecting beam (4), and a steel strand. The central end (1) has two mutually symmetrical outer ends (2) on its left and right sides respectively. The two mutually symmetrical relay ends (3) are distributed on the left and right sides of the central end (1). The relay ends (3) are located between the central end (1) and the outer ends (2). An end connecting beam (4) is fixed between the central end (1) and the outer ends (2). An end connecting beam (4) is fixed between the outer ends (2) and the relay ends (3). The steel strand passes through the end connecting beam (4), the central end (1), the outer ends (2), and the relay ends (3).

2. The large-span support end mechanism for foundation pits according to claim 1, characterized in that: The central end (1) includes a frame (11), a side plate (12), a guide tube (13), and an arc plate (14). Two symmetrical side plates (12) are fixed on the left and right sides of the frame (11). The two side plates (12) are arranged in a figure-eight shape. Several holes for passing through steel strands are distributed on the side plates (12). Several guide tubes (13) are distributed inside the frame (11). The steel strands pass through the guide tubes (13). Several arc plates (14) are fixed from top to bottom inside the frame (11).

3. The large-span support end mechanism for foundation pits according to claim 2, characterized in that: The relay end (3) includes a frame two (31), a side plate two (32), a guide tube two (33), and an arc plate two (34). Two side plates two (32) are fixed on the left and right sides of the frame two (31). The adjacent side plates two (32) are parallel to the side plate one (12). Several holes for passing through steel strands are distributed on the side plates two (32). Several guide tubes two (33) are distributed inside the frame two (31). The steel strands pass through the guide tubes two (33). Several arc plates two (34) are fixed from top to bottom inside the frame two (31).

4. The large-span support end mechanism for foundation pits according to claim 3, characterized in that: The outer end (2) includes a frame three (21), a side plate three (22), a guide tube three (23), and an arc plate three (24). The inner side of the frame three (21) is fixed with a side plate three (22). Several through holes for passing through steel strands are distributed on the side plate three (22). Adjacent side plates three (22) and side plates two (32) are parallel to each other. Several guide tubes three (23) are distributed inside the frame three (21). Several arc plates three (24) are fixed from top to bottom inside the frame three (21).

5. The large-span support end mechanism for foundation pits according to claim 1, characterized in that: The end connecting beam (4) includes an H-beam (41) and a perforated plate (42). The H-beam (41) is fixed with a perforated plate (42) at both ends. The perforated plate (42) has several holes for passing through the steel strand.

6. The large-span support end mechanism for foundation pits according to claim 4, characterized in that: The steel strands between the central end (1) and the relay end (3) are perpendicular to the frame one (11) and the side plate two (32) at both ends of the steel strand, respectively. The steel strands between the outer end (2) and the relay end (3) are perpendicular to the side plate two (32) and the side plate three (22) at both ends of the steel strand, respectively.

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