Assembly type foundation pit supporting structure capable of being freely adjusted

Abstract

The utility model discloses a freely adjustable assembly type foundation pit supporting structure, which relates to the technical field of constructional engineering and comprises two steel sheet piles, a chute component, an assembly type supporting structure and rollers, the sliding groove assemblies are symmetrically arranged on the adjacent sides of the two steel sheet piles. The assembly type supporting structure comprises a first supporting component and a second supporting component. The first supporting component is of a >-shaped structure, a sliding block is welded to the left end of the first supporting component and slidably arranged in the sliding groove assembly, and a flange plate is arranged at the right end of the first supporting component. The second supporting component is composed of end joints and a middle adjusting joint which are in bilateral symmetry. One end of the end joint is connected with the first support member through a flange connector, and the other end is provided with an internal thread interface; according to the technical scheme, a sliding fit structure of the sliding groove assembly and the sliding block is adopted, a traditional welding procedure is omitted, and the installation time of a single supporting structure is greatly shortened; the assembly type supporting structure is rapidly assembled through the flange connecting piece and the thread adjusting joint, and the whole construction period is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building engineering, especially a kind of freely adjustable fabricated foundation pit support structure. BACKGROUND

[0002] In the field of building engineering foundation pit support, steel sheet pile support structure is widely used due to its high strength, convenient construction and other characteristics. The traditional steel sheet pile support usually adopts fixed support system, and when implemented, the steel sheet pile and supporting steel are transported to the site for cutting and welding, forming a dense support network with a vertical spacing of about 2.5-3.0m and a horizontal spacing of about 4m. However, this technology has the following significant defects:

[0003] The on-site welding and cutting process is complicated, the construction period is long, especially in water conservancy projects, it is easy to occupy the key period of dry season, increasing the risk of flood season; the dense fixed support structure severely compresses the mechanical operation space in the foundation pit, making it difficult for excavators and other equipment to work efficiently, slowing down the construction progress; the material loss rate is high, and it is difficult to reuse after disassembly, with poor overall economy. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a freely adjustable fabricated foundation pit support structure to solve the problems in the background art.

[0005] Therefore, the utility model provides a freely adjustable fabricated foundation pit support structure, which comprises:

[0006] Two steel sheet piles, a chute assembly, a fabricated support structure and a roller;

[0007] The chute assembly is symmetrically arranged on one side adjacent to the two steel sheet piles;

[0008] The fabricated support structure comprises a first support member and a second support member;

[0009] The first support member has a ">" shaped structure, a sliding block is welded to the left end and is slidably arranged in the chute assembly, and a flange plate is arranged at the right end;

[0010] The second support member is composed of left and right symmetrical end joints and a middle adjusting joint;

[0011] One end of the end joint is connected to the first support member through a flange connector, and the other end is provided with an internal thread interface;

[0012] The middle adjusting joint is provided with an external thread structure at both ends, and forms an adjustable connection with the internal thread interface of the end joint.

[0013] Optionally, the chute assembly is made of an I-beam or a channel steel to form a "soil"-shaped structure, including a horizontal guide rail and a vertical guide plate.

[0014] Optionally, a polytetrafluoroethylene wear-resistant layer is provided on the contact surface between the slider and the chute assembly.

[0015] Optionally, the flange connecting member and the flange plate are detachably connected by high-strength bolts.

[0016] Optionally, the surface of the intermediate adjustment section is provided with scale marks for accurately adjusting the length, and the adjustment range is 500 - 1500 mm.

[0017] Optionally, the rollers are arranged on the chute assembly and supported on the steel sheet piles.

[0018] Optionally, the horizontal adjustment range of the support structure is 2 - 5 m, and the vertical adjustment spacing is 3 - 4 m, forming a three-dimensional adjustable support system.

[0019] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0020] 1. A freely adjustable prefabricated foundation pit support structure of the present invention adopts a sliding fit structure of a chute assembly and a slider, eliminating the traditional welding process, and greatly shortening the installation time of a single group of support structures; the prefabricated support structure is quickly assembled through flange connecting members and threaded adjustment sections, reducing the overall construction period.

[0021] There is no need for on-site cutting and welding, reducing the generation of construction waste, meeting the requirements of green construction.

[0022] 2. A freely adjustable prefabricated foundation pit support structure of the present invention has an adjustable horizontal spacing range expanded to 2 - 5 m and a vertical spacing increased to 3 - 4 m, increasing the mechanical operation space by more than 40%, and supporting the efficient operation of large equipment.

[0023] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present invention with reference to the drawings:

[0025] Figure 1 is a schematic plan view of the present invention;

[0026] Figure 2 is the present invention Figure 1 A - A cross-sectional view in;

[0027] Figure 3 is the present invention Figure 1Sectional view of B-B;

[0028] Figure 4 Structure diagram of the chute assembly of the utility model;

[0029] Figure 5 Structure diagram of the first supporting member of the utility model;

[0030] Figure 6 Structure diagram of the second supporting member of the utility model.

[0031] Mark 1, steel sheet pile; 2, chute assembly; 21, horizontal guide rail; 22, vertical guide plate; 3, fabricated supporting structure; 31, first supporting member; 311, sliding block; 312, flange plate; 32, second supporting member; 321, end section; 322, intermediate adjusting section; 323, flange connecting piece; 324, internal thread interface; 325, external thread structure; 4, roller. DETAILED DESCRIPTION

[0032] The technical scheme of the utility model embodiment is explained and described below in combination with the drawings of the utility model embodiment, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0033] One kind of freely adjustable fabricated foundation pit support structure of the utility model embodiment is specifically described below in combination with the drawings. EMBODIMENT

[0034] For the convenience of understanding, please refer to Figures 1 to 6 One embodiment of the freely adjustable fabricated foundation pit support structure provided by the utility model comprises:

[0035] Two steel sheet piles 1, a chute assembly 2, a fabricated supporting structure 3 and a roller 4;

[0036] The chute assembly 2 is symmetrically arranged on one side adjacent to the two steel sheet piles 1;

[0037] The fabricated supporting structure 3 comprises a first supporting member 31 and a second supporting member 32;

[0038] The first supporting member 31 is in the shape of ">" structure, a sliding block 311 is welded at the left end and is slidably arranged in the chute assembly 2, and a flange plate 312 is arranged at the right end;

[0039] The second supporting member 32 is composed of left-right symmetrical end sections 321 and an intermediate adjusting section 322;

[0040] The end node 321 is connected with the first support member 31 through the flange connector 323 at one end, and is provided with an internal thread interface 324 at the other end;

[0041] The middle adjusting node 322 is provided with an external thread structure 325 at both ends, and forms an adjustable connection with the internal thread interface 324 of the end node 321. The flange connector 323 forms a detachable connection with the flange plate 312 through high-strength bolts. The horizontal adjustment range of the support structure is 2-5m, the vertical adjustment interval is 3-4m, and a three-dimensional adjustable support system is formed.

[0042] It should be noted that two steel sheet piles 1 are symmetrically punched on both sides of the foundation pit, and the spacing of the steel sheet piles is determined according to the design width of the foundation pit, which is usually 5-10m. The top of the steel sheet pile is provided with a hanging interface for fixing the sliding groove assembly 2.

[0043] The sliding groove assembly 2 is symmetrically welded or hung on the adjacent sides of the two steel sheet piles 1. The first support member 31 is made of a steel pipe in a “>” shape structure, with a sliding block 311 welded at the left end and a flange plate 312 welded at the right end. The second support member 32 includes two end nodes 321 and one middle adjusting node 322. The end node 321 is a steel pipe, one end of which is welded with a flange connector 323, and the other end is provided with an internal thread interface 324. The middle adjusting node 322 is a double-end external thread steel pipe, the two ends of which are externally threaded and connected with the internal thread interface 324 of the end node 321, and the surface is marked with a scale mark, with an adjustment range of 500-1500mm.

[0044] The sliding block 311 of the first support member 31 is embedded in the sliding groove assembly 2, and the first support member 31 is pushed to slide along the horizontal guide rail 21 to the designed horizontal interval of 2-5m. Then, the end node 321 of the second support member 32 is aligned with the flange plate 312 of the first support member 31 through the flange connector 323, and is fastened with high-strength bolts. The length of the middle adjusting node 322 is adjusted by rotating, so that the second support member 32 forms a bracing system with the support structure on the opposite side.

[0045] The sliding groove assembly 2 is pushed along the top of the steel sheet pile 1 by the roller 4, or the sliding block 311 of the first support member 31 is manually slid, to realize continuous adjustment of the horizontal interval of the support structure, with an adjustment range of 2-5m.

[0046] When the steel sheet pile 1 is displaced due to excavation of the foundation pit, the operator rotates the middle adjusting node 322 to extend or shorten the bracing length through the cooperation of the external thread structure 325 and the internal thread interface 324.

[0047] By adjusting the hanging height of the sliding groove assembly 2 on the steel sheet pile 1, the mechanical working space in the foundation pit is expanded, and the support requirements of foundation pits of different depths are met.

[0048] After construction is completed, remove the high-strength bolts, separate the flange connector 323 from the flange plate 312, reverse-rotate the intermediate adjustment section 322 to retract the length of the strut, and pull out the first support member 31 from the chute assembly 2. All steel components: chutes, support structures, etc., can be reused after cleaning, and the material recovery rate is ≥95%.

[0049] In some embodiments, the chute assembly 2 is made of an I-beam or a channel steel to form a "soil"-shaped structure, and includes a horizontal guide rail 21 and a vertical guide plate 22.

[0050] It should be noted that the chute assembly 2 is made of an I-beam to form a "soil"-shaped structure as Figure 1 , and includes a horizontal guide rail 21 and a vertical guide plate 22. The vertical guide plate 22 is fixed to the side wall of the sheet pile 1 by bolts.

[0051] In some embodiments, a polytetrafluoroethylene wear-resistant layer is provided on the contact surface between the slider 311 and the chute assembly 2.

[0052] It should be noted that the slider 311 is slidably mated with the horizontal guide rail 21 of the chute assembly 2, and the contact surface is attached with a polytetrafluoroethylene wear-resistant layer to reduce the frictional resistance.

[0053] In some embodiments, a scale mark is provided on the surface of the intermediate adjustment section 322 for accurately adjusting the length, and the adjustment range is 500 - 1500 mm. The scale mark on the intermediate adjustment section 322 is used to accurately control the adjustment amount to ensure the balanced force of the support structure.

[0054] In some embodiments, the roller 4 is provided on the chute assembly 2 and supported on the sheet pile 1. The roller 4 is provided at the top of the chute assembly 2 and is installed on the horizontal guide rail 21 through a bearing seat, and can roll horizontally along the top of the sheet pile 1 for adjusting the horizontal position of the support structure.

[0055] Furthermore, the chute assembly 2 can be made of a channel steel, and the vertical guide plate 22 is replaced with a detachable snap structure for easy and quick installation. An electric rotating device is installed on the intermediate adjustment section 322 to achieve automatic adjustment of the support length through remote control, and the pressure sensor real-time feedbacks the support force data.

[0056] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A freely adjustable prefabricated foundation pit support structure, characterized in that: Comprising: Two steel sheet piles (1), a chute assembly (2), an assembled support structure (3), and rollers (4); The chute assembly (2) is symmetrically arranged on one side adjacent to the two steel sheet piles (1); The assembled support structure (3) includes a first support member (31) and a second support member (32); The first support member (31) has a ">"-shaped structure. A slider (311) is welded to the left end and is slidably arranged in the chute assembly (2), and a flange plate (312) is provided at the right end; The second support member (32) consists of symmetric left and right end sections (321) and an intermediate adjustment section (322); One end of the end section (321) is connected to the first support member (31) through a flange connector (323), and an internal thread interface (324) is provided at the other end; External thread structures (325) are provided at both ends of the intermediate adjustment section (322), forming an adjustable connection with the internal thread interface (324) of the end section (321).

2. The freely adjustable prefabricated foundation pit support structure according to claim 1, characterized in that: The chute assembly (2) is made of an I-beam or a channel steel into a "soil"-shaped structure, including a horizontal guide rail (21) and a vertical guide plate (22).

3. The freely adjustable prefabricated foundation pit support structure according to claim 1, characterized in that: A polytetrafluoroethylene wear-resistant layer is provided on the contact surface between the slider (311) and the chute assembly (2).

4. The freely adjustable prefabricated foundation pit support structure according to claim 1, characterized in that: The flange connector (323) and the flange plate (312) are detachably connected by high-strength bolts.

5. The freely adjustable prefabricated foundation pit support structure according to claim 1, characterized in that: A scale mark is provided on the surface of the intermediate adjustment section (322) for precise length adjustment, and the adjustment range is 500 - 1500 mm.

6. The freely adjustable prefabricated foundation pit support structure according to claim 1, characterized in that: The rollers (4) are arranged on the chute assembly (2) and support on the steel sheet piles (1).

7. The freely adjustable prefabricated foundation pit support structure according to claim 1, characterized in that: The horizontal adjustment range of this support structure is 2 - 5 m, and the vertical adjustment spacing is 3 - 4 m, forming a three-dimensional adjustable support system.

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