A prestressed beam string steel support structure

Abstract

The utility model discloses a prestressed tense string beam steel support structure relates to tense string beam technical field, including foundation pit, be equipped with a plurality of mounting blocks in the foundation pit, the one side of each mounting block all is equipped with two support components symmetrically, and two support components all include first horizontal bracing and second horizontal bracing, and the length of first horizontal bracing is shorter than the length of second horizontal bracing, the cable is penetrated two first horizontal bracing and two second horizontal bracing the one end away from the inner wall of foundation pit, the one end of each diagonal bracing is articulated with mounting block, and the other end of each diagonal bracing is articulated with two first horizontal bracing and two second horizontal bracing one to one, and is equipped with adjusting assembly in each diagonal bracing, can adjust the length of diagonal bracing through adjusting assembly. The structure is through diagonal bracing and first horizontal bracing and second horizontal bracing to form the triangular support structure, need not to set up the column to support tense string beam, has promoted the stability of support, and still can provide greater construction space for the foundation pit excavation and underground structure installation.

Description

Technical Field

[0001] This utility model relates to the field of tensioned beam technology, specifically to a prestressed tensioned beam steel support structure. Background Technology

[0002] With the acceleration of urbanization and the continuous development of construction, foundation pit support technology has become an indispensable part of modern civil engineering. Foundation pit support devices are mainly used during the construction phase of underground structures to support and protect the soil around the foundation pit, preventing collapse or deformation, thereby ensuring construction safety and the stability of the surrounding environment. As urban construction increasingly expands into underground spaces, foundation pit support technology is also constantly developing, moving towards high efficiency, energy saving, and environmental protection. Currently, existing foundation pit support technologies mostly use steel pipes as the main support, with only one set of tensioned beams, anchor ends, and steel walers. These are driven by a combined truss-type support or driven into the soil to form a waterproof wall, serving a supporting and isolating function to prevent soil collapse.

[0003] For example, Chinese patent CN119352533A, entitled "A Steel Support Connection Structure for a Tensioned Beam in a Foundation Pit," includes a tensioned beam, steel support, concrete walers, concrete corbels, and columns. Steel tie rods at both ends of the tensioned beam are embedded and fixed in the concrete corbels. The invention also includes a first column top connector, a bracket, and a second column top connector. Each side of the second column top connector is connected to a section of the bracket, and the other end of the bracket is embedded and fixed in the concrete corbel. The columns provide support below the second column top connector. The first top connector consists of multiple independent units, each fixedly connected to different positions below the steel support, and each first top connector is supported by its respective column. In this invention, the tensioned beam portion has one end of the bracket connected to the corbel and the other end connected to the second column top connector. By having the columns at the apex and the concrete corbels jointly bear the weight of the tensioned beam, the number of columns can be reduced, lowering construction difficulty and cost.

[0004] While the aforementioned steel support connection structure for a tensioned beam in a foundation pit is practical and convenient, it also has shortcomings. The steel support for the tensioned beam still requires the installation of columns to support the self-weight of the tensioned beam, which will limit the excavation space below. Furthermore, when the tensioned beam structure is subjected to lateral forces, the position of its columns at the bottom of the foundation pit remains unstable, and lateral forces can easily cause the columns to tilt or break, thereby affecting the overall stability of the tensioned beam structure and its use. Utility Model Content

[0005] The purpose of this invention is to provide a prestressed tensioned beam steel support structure to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The prestressed tensioned beam steel support structure includes a foundation pit, in which multiple mounting blocks are provided, and each mounting block has two horizontally symmetrical support components on one side. Each support component includes a first horizontal strut and a second horizontal strut, the first horizontal strut being shorter than the second horizontal strut. A steel cable passes through the ends of the two first horizontal struts and the two second horizontal struts away from the inner wall of the foundation pit. Multiple diagonal struts are provided, one end of each diagonal strut is hinged to the mounting block, and the other end of each diagonal strut is correspondingly hinged to the two first horizontal struts and the two second horizontal struts. Each diagonal strut is provided with an adjustment component, which can be used to adjust the length of the diagonal strut.

[0007] Furthermore, the adjustment assembly includes two connecting blocks, with a connecting rod and a connecting sleeve rotatably connected to one end of the two connecting blocks that are close to each other. A screw is coaxially fixedly connected to one end of the connecting rod that is close to the connecting sleeve. A threaded groove is provided inside the connecting sleeve, and the screw is screwed to the connecting sleeve through the threaded groove.

[0008] Furthermore, a connecting post is fixedly connected to the end of each of the two connecting blocks that are close to each other, and the ends of the connecting rod and the connecting sleeve that are far apart are respectively rotatably sleeved on the two connecting posts.

[0009] Furthermore, a disc is coaxially fixedly connected to the near ends of the two connecting columns, and the diameter of the disc is larger than the diameter of the connecting column. The far ends of the connecting rod and the connecting sleeve are respectively rotatably sleeved on the two discs.

[0010] Furthermore, each of the two first horizontal struts and the two second horizontal struts is hinged to a first hinge seat at one end near the foundation pit. Each first hinge seat is fixedly connected to one side of the mounting block. Each of the two first horizontal struts and the two second horizontal struts has a through hole. Each through hole has a horizontally arranged hinge shaft. Each connecting block near the connecting sleeve is hinged to each hinge shaft in a one-to-one correspondence. Each connecting block near the connecting rod is hinged to a second hinge seat. Each second hinge seat is detachably connected to the mounting block.

[0011] Furthermore, each of the two first horizontal support rods and the two second horizontal support rods has a horizontally formed connection hole at one end away from the foundation pit, and a guide roller is rotatably connected in each connection hole, with the peripheral side of each guide roller in contact with the steel cable.

[0012] Furthermore, each of the first hinge seats is screwed with a first bolt, and each of the two first horizontal support rods and the two second horizontal support rods has a threaded hole vertically formed therein. Each of the first bolts is screwed to the two first horizontal support rods and the two second horizontal support rods through the threaded hole.

[0013] Compared with the prior art, the beneficial effects provided by this utility model are as follows: The prestressed tensioned beam steel support structure is composed of a triangular support structure consisting of diagonal braces, a first horizontal brace, a second horizontal brace, and an installation block. It eliminates the need for columns to support the tensioned beam, thereby improving the stability of the support. It also provides more construction space for foundation pit excavation and underground structure installation. Furthermore, the length of the diagonal brace can be adjusted by adjusting the components, and the same adjustable diagonal brace can be used to support horizontal braces of different lengths, increasing the versatility of the components. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 for Figure 1 Sectional view at point A in the middle; Figure 3 A partial structural schematic diagram provided for an embodiment of this utility model; Figure 4 A top view of a partial structure provided in an embodiment of this utility model; Figure 5 for Figure 4 Sectional view at point B.

[0016] Explanation of reference numerals in the attached drawings: 1. Foundation pit; 2. Mounting block; 3. Connector; 4. Steel cable; 5. First hinge seat; 6. First bolt; 7. First horizontal strut; 8. Second horizontal strut; 9. Second hinge seat; 10. Second bolt; 11. Connecting block; 12. Connecting rod; 13. Connecting sleeve; 14. Through hole; 15. Screw; 16. Connecting column; 17. Disc; 18. Connecting hole; 19. Guide roller. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] Please see Figure 1-5The present invention provides a technical solution: a prestressed tensioned beam steel support structure, comprising a foundation pit 1, a plurality of mounting blocks 2 within the foundation pit 1, and two support components horizontally symmetrically arranged on one side of each mounting block 2, each support component including a first horizontal strut 7 and a second horizontal strut 8, the first horizontal strut 7 being shorter than the second horizontal strut 8, a steel cable 4 passing through the ends of the two first horizontal struts 7 and the two second horizontal struts 8 away from the inner wall of the foundation pit 1, and a plurality of diagonal struts, one end of each diagonal strut being hinged to the mounting block 2. The other end of the diagonal brace is hinged to the two first horizontal braces 7 and the two second horizontal braces 8 in a one-to-one correspondence. Each diagonal brace is equipped with an adjustment component, which can be used to adjust the length of the diagonal brace. Specifically, the diagonal brace, the first horizontal brace 7 and the second horizontal brace 8 form a triangular support structure, eliminating the need for columns to support the tensioned beam, thus improving the stability of the support. It also provides more construction space for the excavation of the foundation pit 1 and the installation of the underground structure. The mounting block 2 is connected to the foundation pit 1 through multiple connectors 3, which can be pins or bolts.

[0019] In this embodiment, the adjustment assembly includes two connecting blocks 11. A connecting rod 12 and a connecting sleeve 13 are rotatably connected to the ends of the two connecting blocks 11 that are close to each other. A screw 15 is coaxially fixedly connected to the end of the connecting rod 12 that is close to the connecting sleeve 13. A threaded groove is opened in the connecting sleeve 13. The screw 15 is screwed to the connecting sleeve 13 through the threaded groove. Specifically, by rotating the connecting rod 12 and the connecting sleeve 13 relative to each other, the screw 15 and the threaded groove are driven to move the connecting rod 12 and the connecting sleeve 13 away from each other along the length direction of the connecting rod 12 through the helical transmission. This achieves the adjustment of the length of the diagonal brace. The adjustable diagonal brace of the same specification can be used to support the first horizontal brace 7 and the second horizontal brace 8 of different lengths, which increases the versatility of the component.

[0020] In this embodiment, a connecting post 16 is fixedly connected to the close end of each of the two connecting blocks 11, and the far ends of the connecting rod 12 and the connecting sleeve 13 are respectively rotatably sleeved on the two connecting posts 16. Specifically, the setting of the connecting post 16 provides the rotation axis of the connecting rod 12 and the connecting sleeve 13, so that the connecting rod 12 and the connecting sleeve 13 will not deflect.

[0021] In this embodiment, a disk 17 is coaxially fixedly connected to the near ends of the two connecting posts 16, and the diameter of the disk 17 is larger than the diameter of the connecting post 16. The far ends of the connecting rod 12 and the connecting sleeve 13 are respectively rotatably sleeved on the two disks 17. Specifically, the diameter of the disk 17 is set to limit the relative position of the connecting rod 12 and the connecting sleeve 13 with the two connecting blocks 11, so as to prevent the connecting rod 12 and the connecting sleeve 13 from disengaging from the corresponding connecting block 11 during rotation, so that the connecting rod 12 and the connecting sleeve 13 can only rotate relative to the corresponding connecting block 11.

[0022] In this embodiment, each of the two first horizontal support rods 7 and the two second horizontal support rods 8 is hinged to a first hinge seat 5 at one end near the foundation pit 1. Each first hinge seat 5 is fixedly connected to one side of the mounting block 2. Each of the two first horizontal support rods 7 and the two second horizontal support rods 8 has a through hole 14. Each through hole 14 has a horizontally arranged hinge shaft. Each connecting block 11 near the connecting sleeve 13 is hinged to each hinge shaft in a one-to-one correspondence. Each connecting block 11 near the connecting rod 12 is hinged to a second hinge seat 9. Each second hinge seat 9 is detachably connected to the mounting block 2. Specifically, each second hinge seat 9 is connected to one side of the mounting block 2 by a second bolt 10, which facilitates the determination of the most suitable inclination angle of the diagonal support rod and ensures the support stability of the diagonal support rod.

[0023] In this embodiment, a connecting hole 18 is horizontally opened at the end of each of the two first horizontal support rods 7 and the two second horizontal support rods 8 away from the pit 1. A guide roller 19 is rotatably connected in each connecting hole 18. The peripheral side of each guide roller 19 is in contact with the steel cable 4. Specifically, the rolling friction of the guide roller 19 facilitates the smooth passage of the steel cable 4 through the ends of the two first horizontal support rods 7 and the two second horizontal support rods 8 away from the pit 1. The two ends of the cable are respectively set on the pit wall of the pit 1.

[0024] In this embodiment, each of the first hinge seats 5 is screwed with a first bolt 6, and each of the two first horizontal support rods 7 and the two second horizontal support rods 8 has a threaded hole vertically opened. Each first bolt 6 is screwed to the two first horizontal support rods 7 and the two second horizontal support rods 8 through the threaded hole. Specifically, the first bolt 6 can stably install the position of the first horizontal support rod 7, and also facilitates the disassembly after the excavation of the foundation pit 1 is completed.

[0025] Working principle: The prestressed tensioned beam steel support structure consists of a triangular support structure composed of diagonal braces, a first horizontal brace 7, a second horizontal brace 8, and an installation block 2. This eliminates the need for columns to support the tensioned beam, improving the stability of the support and providing more construction space for the excavation of the foundation pit 1 and the installation of underground structures. Furthermore, the relative rotation of the connecting rod 12 and the connecting sleeve 13, driven by the helical transmission of the screw 15 and the threaded groove, causes the connecting rod 12 and the connecting sleeve 13 to move away from each other along the length of the connecting rod 12. This allows for adjustment of the length of the diagonal brace, enabling the same adjustable diagonal brace to be used to support first horizontal braces 7 and second horizontal braces 8 of different lengths, increasing the versatility of the components.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A prestressed tensioned beam steel support structure, comprising a foundation pit (1), wherein a plurality of mounting blocks (2) are provided in the foundation pit (1), and two support components are horizontally symmetrically provided on one side of each mounting block (2), and each of the two support components includes a first horizontal strut (7) and a second horizontal strut (8), wherein the length of the first horizontal strut (7) is shorter than the length of the second horizontal strut (8), characterized in that, Also includes: A steel cable (4) passes through one end of the two first horizontal struts (7) and the two second horizontal struts (8) away from the inner wall of the pit (1); Multiple diagonal braces, one end of each diagonal brace is hinged to the mounting block (2), and the other end of each diagonal brace is hinged to two first horizontal braces (7) and two second horizontal braces (8) in a one-to-one correspondence; Each of the diagonal braces is equipped with an adjustment component, which can be used to adjust the length of the diagonal brace.

2. The prestressed beam string structure of claim 1, wherein, The adjustment assembly includes two connecting blocks (11). A connecting rod (12) and a connecting sleeve (13) are rotatably connected to one end of the two connecting blocks (11) that are close to each other. A screw (15) is coaxially fixedly connected to one end of the connecting rod (12) that is close to the connecting sleeve (13). A threaded groove is provided in the connecting sleeve (13), and the screw (15) is screwed to the connecting sleeve (13) through the threaded groove.

3. The prestressed beam string structure of claim 2, wherein, A connecting post (16) is fixedly connected to the close end of each of the two connecting blocks (11), and the far ends of the connecting rod (12) and the connecting sleeve (13) are respectively rotatably sleeved on the two connecting posts (16).

4. The pre-stressed beam string structure of claim 3, wherein, A disc (17) is coaxially fixedly connected to the near end of each of the two connecting columns (16), and the diameter of the disc (17) is larger than the diameter of the connecting column (16). The far ends of the connecting rod (12) and the connecting sleeve (13) are respectively rotatably sleeved on the two discs (17).

5. The pre-stressed beam string structure of claim 2, wherein, Two first horizontal support rods (7) and two second horizontal support rods (8) are each hinged to a first hinge seat (5) at one end near the pit (1). Each first hinge seat (5) is fixedly connected to one side of the mounting block (2). Each first horizontal support rod (7) and two second horizontal support rods (8) has a through hole (14). Each through hole (14) has a horizontally arranged hinge shaft. Each connecting block (11) near the connecting sleeve (13) is hinged to each hinge shaft in a one-to-one correspondence. Each connecting block (11) near the connecting rod (12) is hinged to a second hinge seat (9). Each second hinge seat (9) is detachably connected to the mounting block (2).

6. A prestressed tensioned beam steel support structure according to claim 1, characterized in that, Each of the two first horizontal support rods (7) and the two second horizontal support rods (8) has a horizontally opened connecting hole (18) at one end away from the pit (1). Each of the connecting holes (18) is rotatably connected to a guide roller (19), and the peripheral side of each guide roller (19) is in contact with the steel cable (4).

7. The pre-stressed beam string structure of claim 2, wherein, Each of the first hinge seats (5) is screwed with a first bolt (6), and each of the two first horizontal support rods (7) and the two second horizontal support rods (8) is vertically provided with a threaded hole. Each of the first bolts (6) is screwed to the two first horizontal support rods (7) and the two second horizontal support rods (8) through the threaded hole.

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