Modularized foundation pit supporting device

Abstract

The utility model provides a modularized foundation pit supporting device which comprises a supporting module, the supporting module comprises two single-side supporting assemblies oppositely arranged on the inner side of a foundation pit, downward-inserting baffles are arranged on the sides, close to the inner wall of the foundation pit, of the single-side supporting assemblies, and a transverse supporting assembly is arranged between the two opposite single-side supporting assemblies and close to the upper end. The transverse support assembly comprises a first swing transverse support and a second swing transverse support, the first swing transverse support and the second swing transverse support are rotationally connected with the single-side support assemblies, an adjusting rod with the variable extension length is connected between the first swing transverse support and the second swing transverse support, the adjusting rod is detachable, and the first swing transverse support and the second swing transverse support are provided with inclined lugs with holes. The inclined pulling assemblies capable of swinging by an angle are arranged at the upper ends of the single-side supporting assemblies, one ends of the inclined pulling assemblies are connected with the inclined lugs with the holes, the inclined pulling assemblies and the inclined lugs with the holes are detachable, and the problems that traditional foundation pit supporting construction is long in period and large in workload are solved.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit construction, in particular to a modular foundation pit supporting device. Background Art

[0002] After the excavation of the foundation pit, in order to prevent collapse, it is usually necessary to set up support plates and support plate supports along the side walls of the tunnel. The existing method is usually to prefabricate the baffles, H-shaped steel, etc. in the factory, transport them to the site, insert the H-shaped steel into the soil layer at the bottom of the foundation pit, and insert the baffles between the inner wall of the foundation pit and the H-shaped steel. Then, by measuring the width and depth of the foundation pit, the rest such as horizontal supports and connecting frames between H-shaped steels are made on site and welded into shape. This approach is more flexible, but the construction period is long and the on-site welding workload is large. Another approach is to use the form of inserting steel sheet piles, but it has higher requirements for the construction site and is only suitable for construction environments with large foundation pits, open areas and no debris. Utility Model Content

[0003] The utility model provides a modular foundation pit supporting device, which solves the problems of long construction period and heavy workload of traditional foundation pit supporting.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a modular foundation pit support device, including a support module, the support module includes two single-sided support components relatively arranged on the inner side of the foundation pit, the single-sided support component is provided with a lower plug-in plate on the side close to the inner wall of the foundation pit, and a cross-bracing component is provided between the two opposite single-sided support components near the upper end, the cross-bracing assembly includes a first swinging cross-bracing and a second swinging cross-bracing, the first swinging cross-bracing and the second swinging cross-bracing are rotatably connected to each single-sided support component, an adjustment rod with variable extension length is connected between the first swinging cross-bracing and the second swinging cross-bracing, the adjustment rod is detachable, the first swinging cross-bracing and the second swinging cross-bracing are provided with oblique ears with holes, the upper end of each single-sided support component is provided with an inclined-bracing assembly with a swingable angle, one end of the inclined-bracing assembly is connected to the oblique ear with holes, and the inclined-bracing assembly and the oblique ear with holes are detachable.

[0005] In a preferred solution, the single-sided support assembly includes two L-shaped plug-ins, a cross-connecting plate is provided between the two L-shaped plug-ins to form an H-shaped frame, and the lower end of the L-shaped plug-in is inserted into the soil layer at the bottom of the foundation pit.

[0006] In the preferred solution, a first screw hole block is provided at one end close to the first swing cross brace and the second swing cross brace, and both ends of the adjustment rod are slidably plugged into each first screw hole block. Both ends of the adjustment rod are covered with threaded nuts, and the end faces of each nut abut against each first screw hole block.

[0007] In the preferred solution, the inclined-stayed assembly includes a base section, a second screw hole block is provided at one end of the base section, a threaded telescopic rod is provided in the second screw hole block, one end of the telescopic rod is inserted into the oblique ear with a hole, a threaded nut is sleeved on the end of the telescopic rod, and the nut end face of the telescopic rod abuts against the oblique ear with a hole.

[0008] In the preferred solution, the first swing cross brace and the base section are U-shaped structures, a rotating shaft structure is provided at one end of the first swing cross brace and the base section, a first rotating seat and a second rotating seat are provided on the single-sided support assembly, and the first swing cross brace and the inclined-pull assembly are hinged to the first rotating seat and the second rotating seat respectively.

[0009] The beneficial effects of the present invention are as follows: the single-sided support component adopts a modular design, integrating the cross brace component and the inclined-stay component into one, which is convenient for prefabrication in the factory, saving on-site construction time and reducing construction workload; the component can be stored and folded to reduce the volume and facilitate transportation; the cross brace component can be opened, and the swing cross braces on both sides are connected by adjusting rods to adapt to different foundation pit widths; the lower end of the single-sided support component is smooth, which is convenient for insertion into and removal from the soil layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 It is a schematic diagram of the foundation pit support module.

[0012] Figure 2 This is a top view of the support module.

[0013] Figure 3 The construction status of the support module Figure 1 .

[0014] Figure 4 The construction status of the support module Figure 2 .

[0015] Figure 5 It is a schematic diagram of a single-sided support assembly.

[0016] Figure 6 It is a cross-sectional view of the cable-stayed assembly.

[0017] In the figure: support module 1; lower baffle plate 101; single-sided support assembly 2; L-shaped plug-in unit 201; cross-connecting plate 202; cross brace assembly 3; first swing cross brace 301; second swing cross brace 302; adjustment rod 303; oblique ear with hole 304; first screw hole block 305; first rotating seat 306; oblique-stayed assembly 4; base section 401; telescopic pull rod 402; second screw hole block 403; second rotating seat 404; rotating shaft structure 405; foundation pit 5. DETAILED DESCRIPTION

[0018] like Figure 1-6In the present invention, a modular foundation pit support device includes a support module 1, which includes two single-sided support components 2 arranged relatively on the inner side of a foundation pit 5. A lower baffle 101 is provided on the side of the single-sided support component 2 close to the inner wall of the foundation pit 5, and a cross-bracing component 3 is provided between the two opposite single-sided support components 2 near the upper end. The cross-bracing component 3 includes a first swinging cross-bracing 301 and a second swinging cross-bracing 302. The first swinging cross-bracing 301 and the second swinging cross-bracing 302 are rotatably connected to each single-sided support component 2, and an adjustment rod 303 with a variable extension length is connected between the first swinging cross-bracing 301 and the second swinging cross-bracing 302. The adjustment rod 303 is detachable, and a perforated oblique ear 304 is provided on the first swinging cross-bracing 301 and the second swinging cross-bracing 302. An angled inclined assembly 4 is provided on the upper end of each single-sided support component 2, and one end of the inclined assembly 4 is connected to the perforated oblique ear 304, and the inclined assembly 4 and the perforated oblique ear 304 are detachable.

[0019] The cross bracing assembly 3 and the diagonal bracing assembly 4 are integrated into the single-sided support assembly 2, and the diagonal bracing assembly 4 is above the cross bracing assembly 3. The foundation pit backfill will not exceed the hinge point position between the cross bracing assembly 3 and the single-sided support assembly 2.

[0020] In the preferred solution, the single-sided support assembly 2 includes two L-shaped plug-ins 201, a cross-connecting plate 202 is provided between the two L-shaped plug-ins 201 to form an H-shaped frame, and the lower end of the L-shaped plug-in 201 is inserted into the bottom soil layer of the foundation pit 5.

[0021] The lower end of the L-shaped plug-in 201 is restrained by the soil layer to prevent it from tilting inwards due to squeezing, and the upper end is supported by the cross brace assembly 3 to form a stable support.

[0022] There is a lifting lug on the top of the H-frame, which is prefabricated by welding in the factory.

[0023] The cross bracing assembly 3 and the diagonal bracing assembly 4 can be stored against the inner side of the single-side supporting assembly 2 to reduce the volume and facilitate transportation.

[0024] Since there are no other welding or mounting parts at the lower end of the L-shaped plug-in 201, it is relatively easy to pull out after backfilling.

[0025] In the preferred solution, a first screw hole block 305 is provided at one end close to the first swing cross brace 301 and the second swing cross brace 302, and the two ends of the adjustment rod 303 are slidably inserted into each first screw hole block 305, and the two ends of the adjustment rod 303 are covered with threaded nuts, and the end faces of each nut are against each first screw hole block 305.

[0026] There are preferably four nuts on the adjusting rod 303 , two at each end, to clamp the first screw hole block 305 .

[0027] In the preferred solution, the inclined-stayed assembly 4 includes a base section 401, a second screw hole block 403 is provided at one end of the base section 401, a threaded telescopic rod 402 is provided in the second screw hole block 403, one end of the telescopic rod 402 is inserted into the oblique ear 304 with a hole, a threaded nut is sleeved on the end of the telescopic rod 402, and the nut end face of the telescopic rod 402 abuts against the oblique ear 304 with a hole.

[0028] There are preferably two nuts on the telescopic pull rod 402 to clamp the second screw hole block 403.

[0029] In the preferred solution, the first swinging cross brace 301 and the base section 401 are U-shaped structures, and a rotating shaft structure 405 is provided at one end of the first swinging cross brace 301 and the base section 401. A first rotating seat 306 and a second rotating seat 404 are provided on the single-sided support assembly 2. The first swinging cross brace 301 and the inclined assembly 4 are hinged to the first rotating seat 306 and the second rotating seat 404 respectively.

[0030] The U-shaped structure can facilitate observation and control of the extension length of the adjustment rod 303 and the telescopic pull rod 402, and is also convenient for cleaning after mud enters.

[0031] During construction, after excavating a certain distance in the foundation pit, the two single-sided support assemblies 2 are inserted into the pit. The first and second swinging cross braces 301, 302, which were previously suspended and retracted, are then extended horizontally. The adjustment rods 303 retracted in the first or second swinging cross braces 301, 302 are then extended and the first and second swinging cross braces 301, 302 are then locked together with nuts. Subsequently, the base section 401 is swung out, and the telescopic pull rods 402 are unscrewed and locked to the oblique ears 304 with nuts to form a triangular support.

[0032] After that, after the pipeline is placed, the soil is backfilled to the elevation, and the height of the cross brace assembly 3 is higher than the elevation.

[0033] Continue to construct the next section of the foundation pit. After the previous section of the foundation pit is backfilled, use a crane to extract the support module 1 as a whole for subsequent construction.

[0034] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A modular foundation pit support device, characterized by: The invention comprises a support module (1), wherein the support module (1) comprises two single-sided support assemblies (2) arranged relatively to each other on the inner side of a foundation pit (5), a lower plug-in plate (101) is provided on one side of the single-sided support assembly (2) close to the inner wall of the foundation pit (5), a cross brace assembly (3) is provided between the two relatively single-sided support assemblies (2) close to the upper end, the cross brace assembly (3) comprises a first swing cross brace (301) and a second swing cross brace (302), and the first swing cross brace (301) and the second swing cross brace (302) are connected to each single-sided support assembly. The components (2) are rotatably connected, an adjustment rod (303) with a variable extension length is connected between the first swinging cross brace (301) and the second swinging cross brace (302), and the adjustment rod (303) is detachable. The first swinging cross brace (301) and the second swinging cross brace (302) are provided with oblique ears (304) with holes. The upper end of each unilateral support component (2) is provided with an oblique pull component (4) with a swingable angle, one end of the oblique pull component (4) is connected to the oblique ear (304) with a hole, and the oblique pull component (4) and the oblique ear (304) with a hole are detachable.

2. The modular foundation pit support device according to claim 1 is characterized in that: The single-side support assembly (2) comprises two L-shaped plug-ins (201), a cross-connecting plate (202) is provided between the two L-shaped plug-ins (201) to form an H-shaped frame, and the lower end of the L-shaped plug-in (201) is inserted into the soil layer at the bottom end of the foundation pit (5).

3. The modular foundation pit support device according to claim 1 is characterized in that: A first screw hole block (305) is provided at one end of the first swinging cross brace (301) and the second swinging cross brace (302) adjacent to each other. Both ends of the adjusting rod (303) are slidably plugged into each first screw hole block (305). Both ends of the adjusting rod (303) are sleeved with a nut connected by a thread, and the end surface of each nut abuts against each first screw hole block (305).

4. The modular foundation pit support device according to claim 1 is characterized in that: The inclined-stay assembly (4) includes a base section (401), one end of which is provided with a second screw hole block (403), a threaded telescopic pull rod (402) provided in the second screw hole block (403), one end of the telescopic pull rod (402) is inserted into the oblique ear (304) with a hole, a threaded nut is sleeved on the end of the telescopic pull rod (402), and the end face of the nut of the telescopic pull rod (402) abuts against the oblique ear (304) with a hole.

5. The modular foundation pit support device according to claim 4 is characterized in that: The first swinging cross brace (301) and the base section (401) are U-shaped structures. A rotating shaft structure (405) is provided at one end of the first swinging cross brace (301) and the base section (401). A first rotating seat (306) and a second rotating seat (404) are provided on the single-sided support assembly (2). The first swinging cross brace (301) and the inclined-stay assembly (4) are hinged to the first rotating seat (306) and the second rotating seat (404), respectively.

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