Hybrid string supporting beam system for supporting deep foundation pit

Abstract

The utility model discloses a mixed string supporting beam system for supporting a deep foundation pit, which relates to the technical field of civil engineering and can solve the problems that the existing supporting beam structure is difficult to simultaneously meet the requirements of high safety level of the supporting of the foundation pit, the supporting material can be repeatedly utilized and the construction and the disassembly are simple. The mixed type string supporting beam system for supporting the deep foundation pit comprises a concrete girth, a string supporting beam structure and a stand column assembly used for supporting the string supporting beam structure, the string supporting beam structure comprises a supporting beam assembly arranged horizontally and a string beam assembly arranged in an arch shape in the horizontal direction, and the supporting beam assembly is connected with the string beam assembly. One end of the supporting beam assembly abuts against the string beam assembly, the other end of the supporting beam assembly abuts against the concrete girth, and the two ends of the string beam assembly are connected to the concrete girth.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a hybrid string support beam system for deep foundation pit support. Background Art

[0002] Foundation pit support is a measure of support, reinforcement and protection to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. It includes many types, and the specific support type is usually selected based on the surrounding construction environment, geological conditions, and hydrological conditions.

[0003] In order to improve the safety of the foundation pit retaining wall and avoid the surrounding strata squeezing the foundation pit support, which causes lateral displacement of the foundation pit support, a support beam structure is usually constructed after the foundation pit support construction is completed to improve the stability of the foundation pit support. At present, in order to improve the safety of the foundation pit retaining wall, the concrete cast support beams are usually used. The construction and disassembly process is cumbersome, and the abandoned wall after dismantling is difficult to reuse, and the construction cost is high. In order to solve the problems of high construction cost and troublesome disassembly, the industry has proposed a solution of using pure steel structure support, which can solve the problems of troublesome disassembly, high construction cost, and difficulty in reusing materials. However, the support beams of pure steel structure are prone to stress deformation during the support process. In the scenario where the safety level of the foundation pit support is required to be high, the support beams of pure steel structure are difficult to meet the use requirements.

[0004] Based on the above background, the inventor has designed a hybrid tension-string bracing beam system for deep foundation pit support to solve one or more of the above problems, and thus proposed the present application. Utility Model Content

[0005] The purpose of this application is to provide a hybrid tensioned beam structure for deep foundation pit support, which solves the problem that the current support beam structure is difficult to simultaneously meet the high safety level requirements of foundation pit support, reusable support materials, and simple construction and disassembly.

[0006] In order to solve the above technical problems, the utility model adopts the following solutions:

[0007] The present application provides a hybrid string-supported beam system for deep foundation pit support, comprising a concrete surrounding beam and a string-supported beam structure, and a column assembly for supporting the string-supported beam structure, wherein:

[0008] The string support beam structure includes a horizontally arranged support beam assembly and a string beam assembly arranged in an arch shape along the horizontal direction. One end of the support beam assembly abuts against the string beam assembly, and the other end abuts against the concrete surrounding beam. Both ends of the string beam assembly are connected to the concrete surrounding beam.

[0009] Optionally, the support beam assembly includes a support main beam and a U-shaped bracket, and the support main beam is fixedly connected to the middle part of the back side of the opening of the U-shaped bracket;

[0010] One end of the supporting main beam away from the U-shaped bracket abuts against the string beam assembly and is rotatably connected thereto, and the rotating shaft is arranged perpendicular to the horizontal plane;

[0011] The open side of the U-shaped bracket is clamped on the concrete surrounding beam.

[0012] Optionally, the support beam assembly also includes at least two supporting oblique beams, which are symmetrically arranged on both sides of the supporting main beam, with one end of the supporting oblique beam fixedly connected to the middle of the supporting main beam, and the other end fixedly connected to the end on the back side of the U-shaped bracket opening.

[0013] Optionally, the chord beam assembly includes a plurality of chord beam members, and the plurality of chord beam members are sequentially connected to form a bow shape;

[0014] The ends of the string beam members at both ends of the bow are rotatably connected to the concrete surrounding beam.

[0015] Optionally, the chord beam assembly further comprises a chord beam end positioning block fixedly arranged on the concrete surrounding beam;

[0016] The ends of the string beam rods at both ends of the bow are rotatably connected to the string beam end positioning blocks;

[0017] It also includes an inclined plane adjusting block inserted between the U-shaped bracket and the concrete surrounding beam, and both ends of the U-shaped bracket are provided with inclined plane adjusting blocks.

[0018] Optionally, it also includes a supporting steel plate beam fixed on the inner side of the concrete surrounding beam;

[0019] The U-shaped bracket opening of the support beam assembly is clamped on the supporting steel plate beam and the concrete surrounding beam;

[0020] Both ends of the chord beam assembly are connected to the concrete perimeter beam through supporting steel plate beams.

[0021] Optionally, the chord beam assembly includes a plurality of chord beam members and at least two chord beam end positioning blocks, the chord beam end positioning blocks are fixed on the supporting steel plate beam, and the plurality of chord beam members are sequentially connected to form a bow shape;

[0022] The ends of the string beam rods at both ends of the bow are rotatably connected to the string beam end positioning blocks;

[0023] There are at least two supporting steel plate beams, a gap is provided between the two supporting steel plate beams, and two chord beam end positioning blocks are respectively arranged on the two supporting steel plate beams.

[0024] Optionally, the column assembly includes a plurality of columns inserted and fixed in the foundation pit, and a U-shaped beam support arranged at the top of the column;

[0025] It also includes a support sliding beam for being placed on the U-shaped beam support and rotatably connected thereto. The support sliding beam is arranged perpendicular to the support beam assembly, and the support beam assembly is placed on the support sliding beam.

[0026] Optionally, a support slide bracket having a cross-section is fixed on the support sliding beam, and the support slide bracket is buckled and slidably connected to the support beam assembly.

[0027] Beneficial effects of the utility model:

[0028] 1. The present application sets up a concrete perimeter beam and a tensioned support beam structure, and can utilize the concrete perimeter beam to provide sufficient tensile structural strength, thereby avoiding the problem that the support of a pure steel structure is easily deformed after being tensile, resulting in lateral displacement and other problems. The tensioned support beam structure can utilize the bow-shaped string beam assembly and the support beam assembly to provide sufficient prestress for the concrete perimeter beam, thereby improving the overall support effect of the concrete perimeter beam. At the same time, the string beam assembly and the support beam assembly adopt a steel structure, and the concrete perimeter beam is supported after being assembled through an assembly process, so that most of the materials of the entire support system can be reused and the overall construction difficulty is reduced. Therefore, the support system of the present application can simultaneously meet the high requirements of the foundation pit support safety level, as well as the requirements of reusable support materials and simple construction and disassembly, thereby solving the problems of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure in the embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1-retaining wall, 11-supporting piles, 2-concrete surrounding beam, 3-supporting steel plate beam, 4-chord beam assembly, 41-chord beam rod, 42-chord beam end positioning block, 5-supporting beam assembly, 51-supporting main beam, 52-U-shaped bracket, 53-supporting inclined beam, 6-supporting sliding beam, 7-U-shaped beam support, 8-inclined adjustment block. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0032] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0035] like Figure 1 As shown, this embodiment provides a hybrid tension-string support beam system for deep foundation pit support, including a concrete surrounding beam 2 and a tension-string support beam structure, and a column assembly for supporting the tension-string support beam structure, wherein:

[0036] The string support beam structure includes a horizontally arranged support beam assembly 5 and a string beam assembly 4 arranged in an arch shape along the horizontal direction. One end of the support beam assembly 5 abuts against the string beam assembly 4, and the other end abuts against the concrete surrounding beam 2. Both ends of the string beam assembly 4 are connected to the concrete surrounding beam 2.

[0037] In this embodiment, by setting up a concrete perimeter beam 2 and a tensioned support beam structure, the concrete perimeter beam 2 can be used to provide sufficient tensile structural strength, thereby avoiding the problem that the support of a pure steel structure is easily deformed after being tensile, resulting in lateral displacement and other problems. The tensioned support beam structure can use the bow-shaped string beam assembly 4 and the support beam assembly 5 to provide sufficient prestress for the concrete perimeter beam 2, thereby improving the overall support effect of the concrete perimeter beam 2. At the same time, the string beam assembly 4 and the support beam assembly 5 adopt a steel structure, which is assembled during an assembly process and then supports the concrete perimeter beam 2, so that most of the materials of the entire support system can be reused and the overall construction difficulty is reduced. Therefore, the support system of the present application can simultaneously meet the high requirements of the foundation pit support safety level, as well as the requirements of reusable support materials and simple construction and disassembly, thereby solving the problems of the prior art.

[0038] In this embodiment, support piles 11 are arranged in the retaining wall 2 to improve the support effect of the retaining wall 1 .

[0039] Specifically, in this embodiment, Figure 1 As shown, the support beam assembly 5 includes a support main beam 51 and a U-shaped bracket 52, and the support main beam 51 is fixedly connected to the middle part of the back side of the opening of the U-shaped bracket 52;

[0040] One end of the supporting main beam 51 away from the U-shaped bracket 52 abuts against the string beam assembly 4 and is rotatably connected thereto, and the rotating shaft is arranged perpendicular to the horizontal plane;

[0041] The open side of the U-shaped bracket 52 is engaged with the concrete surrounding beam 2. By providing the supporting main beam 51 and the U-shaped bracket 52, one end of the supporting beam assembly 5 is placed on the concrete surrounding beam 2 through the U-shaped bracket 52, and the other end of the supporting beam assembly 5 is placed on the column assembly, so that the string support beam structure is in a horizontal state during the entire support process.

[0042] Specifically, in this embodiment, Figure 1 As shown, the support beam assembly 5 also includes at least two support inclined beams 53, which are symmetrically arranged on both sides of the support main beam 51, one end of the support inclined beam 53 is fixedly connected to the middle of the support main beam 51, and the other end is fixedly connected to the end of the back side of the opening of the U-shaped clamp 52. By providing the support inclined beams 53, the structural strength of the support beam assembly 5 can be improved, and the force uniformity of the concrete surrounding beam 2 after the support beam assembly 5 transmits pressure to the U-shaped clamp 52 can be improved, thereby improving the lateral displacement protection effect of the retaining wall 1 and the concrete surrounding beam 2.

[0043] Specifically, in this embodiment, Figure 1 As shown, the chord beam assembly 4 includes a plurality of chord beam members 41, and the plurality of chord beam members 41 are sequentially connected to form a bow shape;

[0044] The ends of the chord members 41 at both ends of the bow are rotatably connected to the concrete surrounding beam 2. The chord assembly 4 is composed of multiple chord members 41 connected in a bow shape, which can improve the structural strength of the chord assembly 4 and reduce the difficulty of construction and subsequent disassembly.

[0045] Specifically, in this embodiment, Figure 1 As shown, the chord beam assembly 4 also includes a chord beam end positioning block 42 fixedly arranged on the concrete surrounding beam 2;

[0046] The ends of the string beam rods 41 at both ends of the bow are rotatably connected to the string beam end positioning blocks 42;

[0047] It also includes an inclined adjustment block 8 inserted between the U-shaped bracket 52 and the concrete surrounding beam 2, and both ends of the U-shaped bracket 52 are provided with an inclined adjustment block 8. By providing the inclined adjustment block 8, the pressure of the support beam assembly 5 pushing the concrete surrounding beam 2 can be further adjusted to provide sufficient safety margin for safely supporting the concrete surrounding beam 2 and the retaining wall 1.

[0048] Specifically, in this embodiment, Figure 1 As shown, it also includes a supporting steel plate beam 3 fixed on the inner side of the concrete surrounding beam 2;

[0049] The U-shaped bracket 52 of the support beam assembly 5 is opened and clamped on the support steel plate beam 3 and the concrete surrounding beam 2;

[0050] Both ends of the string beam assembly 4 are connected to the concrete surrounding beam 2 through the supporting steel plate beam 3. By providing the supporting steel plate beam 3, the safety support effect can be further improved on the basis of maintaining the advantages of easy disassembly and reusable materials of the overall system.

[0051] Specifically, in this embodiment, Figure 1 As shown, the chord beam assembly 4 includes a plurality of chord beam members 41 and at least two chord beam end positioning blocks 42, the chord beam end positioning blocks 42 are fixed on the supporting steel plate beam 3, and the plurality of chord beam members 41 are sequentially connected to form a bow shape;

[0052] The ends of the string beam rods 41 at both ends of the bow are rotatably connected to the string beam end positioning blocks 42;

[0053] There are at least two supporting steel plate beams 3, and there is a gap between the two supporting steel plate beams 3. Two chord beam end positioning blocks 42 are respectively arranged on the two supporting steel plate beams 3. The two chord beam end positioning blocks 42 are fixed on the two supporting steel plate beams 3, and there is a gap between the two supporting steel plate beams 3, so that when the tensioning force of the chord beam assembly 4 needs to be adjusted later, a jack or other structure can be arranged in the gap between the two supporting steel plate beams 3 to drive the two chord beam end positioning blocks 42 away from each other, thereby increasing the tensioning force of the chord beam assembly 4 and improving the supporting effect of the supporting beam assembly 5 on the concrete surrounding beam 2 and the retaining wall 1.

[0054] Specifically, in this embodiment, Figure 1 As shown, the column assembly includes a plurality of columns inserted and fixed in the foundation pit, and a U-shaped beam support 7 arranged at the top of the column;

[0055] It also includes a support sliding beam 6 for being placed on and rotatably connected to the U-shaped beam support 7, the support sliding beam 6 is arranged perpendicular to the support beam assembly 5, and the support beam assembly 5 is placed on and slidably connected to the support sliding beam 6. By arranging the U-shaped beam support 7 and the support sliding beam 6, the support beam assembly 5 can slide freely on the support sliding beam 6, avoiding reducing the support effect of the support beam assembly 5 on the concrete surrounding beam 2 and the retaining wall 1 due to friction.

[0056] Specifically, in this embodiment, the cross section of the supporting main beam 51 is I-shaped, and a supporting slide bracket with a cross section is fixed on the supporting slide beam 6, and the supporting slide bracket is buckled and slidably connected to the supporting main beam 51. The cross section of the supporting main beam 51 is I-shaped, and the supporting slide bracket is provided, which can limit the sliding of the supporting main beam 51.

[0057] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A hybrid string-supported beam system for deep foundation pit support, characterized in that: It comprises a concrete perimeter beam (2) and a string-supported beam structure, and a column assembly for supporting the string-supported beam structure, wherein: The string-supported beam structure comprises a horizontally arranged support beam assembly (5) and a string beam assembly (4) arranged in an arch shape in the horizontal direction, one end of the support beam assembly (5) abuts against the string beam assembly (4), and the other end abuts against the concrete surrounding beam (2), and both ends of the string beam assembly (4) are connected to the concrete surrounding beam (2).

2. A hybrid braced beam system for deep foundation pit support according to claim 1, characterized in that: The support beam assembly (5) comprises a support main beam (51) and a U-shaped bracket (52), wherein the support main beam (51) is fixedly connected to the middle portion of the back side of the opening of the U-shaped bracket (52); One end of the supporting main beam (51) away from the U-shaped bracket (52) is abutted against the string beam assembly (4) and is rotatably connected thereto, and the rotation axis is arranged perpendicular to the horizontal plane; An open side of the U-shaped bracket (52) is engaged with the concrete surrounding beam (2).

3. A hybrid braced beam system for deep foundation pit support according to claim 2, characterized in that: The support beam assembly (5) further comprises at least two support oblique beams (53), the two support oblique beams (53) being symmetrically arranged on both sides of the support main beam (51), one end of the support oblique beam (53) being fixedly connected to the middle of the support main beam (51), and the other end being fixedly connected to the end of the back side of the opening of the U-shaped bracket (52).

4. A hybrid braced beam system for deep foundation pit support according to claim 2, characterized in that: The chord beam assembly (4) comprises a plurality of chord beam rods (41), wherein the plurality of chord beam rods (41) are sequentially connected to form a bow shape; The ends of the chord beam members (41) located at both ends of the bow are rotatably connected to the concrete surrounding beam (2).

5. A hybrid braced beam system for deep foundation pit support according to claim 4, characterized in that: The chord beam assembly (4) further comprises a chord beam end positioning block (42) fixedly arranged on the concrete surrounding beam (2); The ends of the string beam rods (41) located at both ends of the bow are rotatably connected to the string beam end positioning blocks (42); It also includes an inclined plane adjustment block (8) inserted between the U-shaped bracket (52) and the concrete surrounding beam (2), and the inclined plane adjustment blocks (8) are arranged at both ends of the U-shaped bracket (52).

6. A hybrid braced beam system for deep foundation pit support according to claim 2, characterized in that: It also includes a supporting steel plate beam (3) fixed on the inner side of the concrete surrounding beam (2); The opening of the U-shaped bracket (52) of the support beam assembly (5) is clamped on the supporting steel plate beam (3) and the concrete surrounding beam (2); Both ends of the chord beam assembly (4) are connected to the concrete surrounding beam (2) via supporting steel plate beams (3).

7. A hybrid braced beam system for deep foundation pit support according to claim 6, characterized in that: The chord beam assembly (4) comprises a plurality of chord beam rods (41) and at least two chord beam end positioning blocks (42), the chord beam end positioning blocks (42) being fixed on the supporting steel plate beam (3), and the plurality of chord beam rods (41) being connected in sequence to form a bow shape; The ends of the string beam rods (41) located at both ends of the bow are rotatably connected to the string beam end positioning blocks (42); There are at least two supporting steel plate beams (3), a gap is provided between the two supporting steel plate beams (3), and two chord beam end positioning blocks (42) are respectively arranged on the two supporting steel plate beams (3).

8. The hybrid braced beam system for deep foundation pit support according to claim 1, characterized in that: The column assembly comprises a plurality of columns inserted and fixed in the foundation pit, and a U-shaped beam support (7) arranged at the top of the columns; It also includes a support sliding beam (6) for being placed on the U-shaped beam support (7) and rotatably connected thereto, the support sliding beam (6) being arranged perpendicular to the support beam assembly (5), and the support beam assembly (5) being placed on the support sliding beam (6).

9. A hybrid braced beam system for deep foundation pit support according to claim 8, characterized in that: A support slide bracket having a cross section is fixed on the support slide beam (6), and the support slide bracket is buckled and slidably connected to the support beam assembly (5).

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