Supporting structure and supporting system of open cut foundation pit

Abstract

The utility model relates to the technical field of foundation pit construction, in particular to a supporting structure and a supporting system of an open cut foundation pit, the supporting structure comprises a first horizontal beam and a second horizontal beam which are oppositely arranged, and a groove plate is embedded in one side, close to the second horizontal beam, of the first horizontal beam; the supporting rod is located between the first horizontal beam and the second horizontal beam, the supporting rod comprises a telescopic component and a fixed section component which are connected with each other, the end, away from the telescopic component, of the fixed section component is detachably connected with the second horizontal beam, and the end, away from the fixed section component, of the telescopic component abuts against the groove plate. When the supporting rod is hoisted, the supporting rod can be rapidly installed only by connecting the fixed section component with the second horizontal beam and extending the telescopic component to abut against the groove plate, and due to the fact that the groove plate is embedded in the first horizontal beam, the supporting effect is high, the supporting rod can be effectively prevented from falling off, and the practicability is high. The process that multiple correction is needed when two ends of a traditional steel support are connected with the steel enclosing purlin is avoided, operation is easy, and consumed time is short.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit construction technology, and in particular to a support structure and support system for open-cut foundation pits. Background Technology

[0002] In the construction of urban rail transit buildings, it is often necessary to build foundation pits. Foundation pits are constructed by excavating the roadbed using excavation equipment, and construction workers work inside the foundation pits. In order to facilitate construction work inside the foundation pits and ensure the safety of construction workers, it is necessary to ensure the stability of the foundation pit sidewalls during the construction process. Temporary support facilities are often built on the sidewalls of the foundation pits.

[0003] Temporary support structures typically employ a connection between steel braces and steel walers, with both playing a crucial role. After excavation, the retaining structure, such as diaphragm walls and pile banks, is subjected to external soil and water pressure, causing it to tend to deform inwards. The support system, composed of steel walers and steel braces, effectively limits deformation by providing horizontal support to the retaining structure, preventing damage due to excessive deformation and thus ensuring the safety of the surrounding environment.

[0004] However, in the current construction process, the traditional connection between steel supports and steel walers is welding or threaded connection. The process requires the use of large equipment to hoist the steel supports, and the connection between the two ends of the steel supports and the steel walers requires multiple adjustments to ensure that both ends of the steel supports can be connected to the steel walers. The operation is cumbersome and time-consuming. Utility Model Content

[0005] The purpose of this utility model is to provide a support structure and support system for open-cut foundation pits, addressing the problem that the traditional connection between steel supports and steel walers in the background technology is welding or threaded connection, and the connection between the two ends of the steel support and the steel waler requires multiple adjustments, which is cumbersome and time-consuming.

[0006] In a first aspect, this utility model provides a support structure for an open-cut foundation pit, comprising:

[0007] A first horizontal beam and a second horizontal beam are arranged opposite each other, and a grooved plate is embedded in the side of the first horizontal beam closer to the second horizontal beam;

[0008] A support rod is located between the first horizontal beam and the second horizontal beam. The support rod includes a telescopic member and a fixed section member connected to each other. The end of the fixed section member away from the telescopic member is detachably connected to the second horizontal beam. The end of the telescopic member away from the fixed section member abuts against the groove plate.

[0009] Preferably, the grooved plate has a grooved area;

[0010] The telescopic component includes a movable part and a support box. The movable part is slidably disposed in the support box and is used to abut against the bottom of the groove area.

[0011] Preferably, the flexible part includes an end plate and two side plates connected to the end plate;

[0012] The support box includes two side walls arranged opposite to each other. The side walls have sliding grooves inside, and the sliding grooves are arranged along the length of the side walls. The side plates are slidably fitted into the sliding grooves.

[0013] The support box is also equipped with a jack, and the piston rod of the jack is connected to the end plate.

[0014] Preferably, the support box further includes a top plate, a bottom plate, and a base, wherein the top plate, the bottom plate, and the two side walls form a box-shaped component, and one end of the box-shaped component is connected to the base;

[0015] The top of the sliding groove near one end of the base has an opening, and a wedge block is placed in the opening to clamp the side plate in the sliding groove.

[0016] Preferably, the bottom of the sliding groove near the base has a through hole, and the area of ​​the through hole is smaller than the area of ​​the opening.

[0017] Preferably, the fixed section component includes a steel pipe and flanges connected to both ends of the steel pipe.

[0018] Preferably, it also includes a fall arrestor assembly for suspending the first horizontal beam, the second horizontal beam, and the support rod.

[0019] Preferably, the fall arrestor assembly includes:

[0020] The first anti-fall bar is used to suspend the first horizontal beam;

[0021] The second anti-fall bar is used to suspend the second horizontal beam;

[0022] The third anti-fall bar is used to suspend the telescopic component;

[0023] The fourth anti-fall bar is used to suspend the fixed section component.

[0024] Preferably, the fall arrestor includes a pre-embedded part, a first connecting rod, a turnbuckle, and a second connecting rod connected in sequence.

[0025] In a second aspect, the present invention provides a support system for an open-cut foundation pit, comprising a retaining structure and a support structure as described in this application, wherein a first horizontal beam and a second horizontal beam are respectively connected to two opposite sides of the retaining structure, and a support rod is installed between the first horizontal beam and the second horizontal beam, and the support rod is used to support the first horizontal beam and the second horizontal beam.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] This application discloses a support structure for an open-cut foundation pit. By installing a grooved plate on a first horizontal beam, during the hoisting of the support rod, the fixed section of the support rod is connected to a second horizontal beam, and the telescopic component of the support rod extends and abuts against the grooved plate on the first horizontal beam. With this design, the support rod can be quickly installed simply by connecting the fixed section to the second horizontal beam and having the telescopic component extend and abut against the grooved plate. The grooved plate not only provides installation space for the support rod but also provides strong support due to its embedding in the first horizontal beam, effectively preventing the support rod from falling. Compared to the installation of conventional steel supports, this avoids the need for multiple adjustments when connecting the two ends of the support rod to the steel walers. The operation is simple and time-saving. Furthermore, when the support rod needs to be replaced due to damage, the telescopic component retracts to the outside of the first horizontal beam, and then the fixed section is separated from the second horizontal beam, allowing for the disassembly of the support rod, greatly improving work efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the supporting structure of this application. Figure 1 .

[0029] Figure 2 This is a schematic diagram of the supporting structure of this application. Figure 2 .

[0030] Figure 3 This is a schematic diagram of the first horizontal beam.

[0031] Figure 4 yes Figure 3 The right view.

[0032] Figure 5 This is a schematic diagram of the second horizontal beam.

[0033] Figure 6 This is a structural diagram of the telescopic component.

[0034] Figure 7 yes Figure 6 Top view.

[0035] Figure 8 This is a structural schematic diagram of the support box.

[0036] Figure 9 yes Figure 8 Top view.

[0037] Figure 10 yes Figure 9 Sectional view at point AA.

[0038] Figure 11 This is a view of the side wall of the support box.

[0039] Figure 12 This is a schematic diagram of the flexible part of the body.

[0040] Figure 13 yes Figure 12 The right view.

[0041] Figure 14 This is a structural diagram of a fall arrestor bar.

[0042] Marked in the image:

[0043] 1-First horizontal beam,

[0044] 2-Second horizontal beam,

[0045] 3-Groove plate, 31-Groove area,

[0046] 4-Support rod,

[0047] 41-Expansion joint,

[0048] 411-Modular section, 4111-End plate, 4112-Side plate

[0049] 412-Support box, 4121-Side wall, 4122-Top plate, 4123-Bottom plate, 4124-Base,

[0050] 413-Jack,

[0051] 42-Fixed section component, 421-Steel pipe, 422-Flange,

[0052] 5-Sliding groove, 51-Opening, 52-Through hole,

[0053] 6-Opening area,

[0054] 8-Slotted parts,

[0055] 9-Anti-fall bar assembly,

[0056] 91 - First fall arrestor bar, 92 - Second fall arrestor bar, 93 - Third fall arrestor bar, 94 - Third fall arrestor bar

[0057] 901-Embedded part, 902-First connecting rod, 903-Turn bolt, 904-Second connecting rod, 10-Tripod,

[0058] 20 - First Ring,

[0059] 30-Wedge block,

[0060] 40-Plate,

[0061] 50 - Second ring,

[0062] 100 - Envelope. Detailed Implementation

[0063] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0064] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0065] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0066] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0067] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0068] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0069] Example 1

[0070] like Figures 1-3 As shown in the figure, the support structure for an open-cut foundation pit disclosed in this embodiment includes:

[0071] The first horizontal beam 1 and the second horizontal beam 2 are set opposite to each other, and a grooved plate 3 is embedded in the side of the first horizontal beam 1 closer to the second horizontal beam 2;

[0072] The support rod 4 is located between the first horizontal beam 1 and the second horizontal beam 2. The support rod 4 includes a telescopic member 41 and a fixed section member 42 connected to each other. The end of the fixed section member 42 away from the telescopic member 41 is detachably connected to the second horizontal beam 2. The end of the telescopic member 41 away from the fixed section member 42 abuts against the groove plate 3.

[0073] By setting a grooved plate 3 on the first horizontal beam 1, when hoisting the support rod 4, the fixed section component 42 of the support rod 4 is connected to the second horizontal beam 2, and the telescopic component 41 of the support rod 4 extends and abuts against the grooved plate 3 of the first horizontal beam 1. With this application, the support rod 4 only needs to be connected to the second horizontal beam 2, and the telescopic component 41 can be extended and abut against the grooved plate 3 to achieve quick installation of the support rod 4. The grooved plate 3 not only provides installation space for the support rod 4, but also has a strong supporting effect because it is embedded in the first horizontal beam 1, which can effectively prevent the support rod 4 from falling. Compared with the installation of steel supports, it avoids the process of multiple corrections when connecting the two ends of the support rod 4 to the steel walers. Its operation is simple and time-saving. Furthermore, when the support rod 4 is damaged and needs to be replaced, the telescopic component 41 retracts to the outside of the first horizontal beam 1, and then the fixed section component 42 is separated from the second horizontal beam 2, so that the support rod 4 can be disassembled, which greatly improves the work efficiency.

[0074] In one or more implementations, such as Figure 3 , Figure 4 As shown, the grooved plate 3 has a grooved area 31;

[0075] like Figure 6 As shown, the telescopic member 41 includes a movable part 411 and a support box 412. The movable part 411 is slidably disposed in the support box 412, and the movable part 411 is used to abut against the bottom of the groove area 31.

[0076] When installing the support rod 4, first control the retraction of the movable part 411 to shorten the telescopic member 41. Then, hoist the support rod 4 and connect the end of the fixed section member 42 away from the telescopic member 41 to the second horizontal beam 2. Then, control the extension of the movable part 411 until the movable part 411 abuts against the bottom of the groove area 31, so that the telescopic member 41 abuts against the first horizontal beam 1, completing the installation of the support rod 4. The support rod 4 supports the first horizontal beam 1 and the second horizontal beam 2. In actual foundation pit operations, the first horizontal beam 1 and the second horizontal beam 2 are installed on the retaining structure 100. Through the support structure of this application, the retaining structure 100 of the open-cut foundation pit is effectively supported, thereby ensuring the safety of foundation pit construction.

[0077] Furthermore, such as Figure 12 , Figure 13 As shown, the flexible part 411 includes an end plate 4111 and two side plates 4112 connected to the end plate 4111;

[0078] The end plate 4111 is vertically arranged, the side plate 4112 is horizontally arranged, and one end of the side plate 4112 is connected to the end plate 4111.

[0079] like Figure 9 , Figure 10 As shown, the support box 412 includes two side walls 4121 arranged opposite to each other. The side wall 4121 has a sliding groove 5 inside. The sliding groove 5 is arranged along the length direction of the side wall 4121, and the side plate 4112 is slidably engaged in the sliding groove 5.

[0080] The support box 412 also contains a jack 413, whose piston rod is connected to the end plate 4111. Figure 7 ;

[0081] The side plate 4112 of the flexible part 411 is slidably fitted in the side wall 4121 of the support box 412. Specifically, the side plate 4112 is slidably disposed in the sliding groove 5 of the side wall 4121, so that the side plate 4112 can slide on the side wall 4121 of the support box 412.

[0082] A jack 413 is installed inside the support box 412. The piston rod of the jack 413 is connected to the end plate 4111. When the movable part 411 needs to be extended, the piston rod of the jack 413 is extended by controlling the piston rod of the jack 413. The piston rod drives the end plate 4111 to move forward, thereby realizing the extension of the movable part 411.

[0083] When the flexible section 411 needs to be shortened, the piston rod of the jack 413 is controlled to retract, and the piston rod drives the end plate 4111 to move backward, thereby realizing the contraction of the flexible section 411.

[0084] Furthermore, such as Figure 10 As shown, the support box 412 also includes a top plate 4122, a bottom plate 4123 and a base 4124. The top plate 4122, the bottom plate 4123 and the two side walls 4121 form a box-shaped component, and one end of the box-shaped component is connected to the base 4124.

[0085] In this embodiment, the top plate 4122 is connected to the top of the two side walls 4121, the bottom plate 4123 is connected to the bottom of the two side walls 4121, and one end of the box-shaped component is fixedly connected to the base 4124.

[0086] like Figure 8 , Figure 9 As shown, the top of the sliding groove 5 near the base 4124 has an opening 51, as... Figure 6 , Figure 7 As shown, a wedge block 30 is placed inside the opening 51. The wedge block 30 is used to clamp the side plate 4112 in the sliding groove 5.

[0087] In this embodiment, the side plate 4112 of the movable part 411 slides within the sliding groove 5 of the support box 412. After the movable part 411 abuts against the groove plate 3, a wedge block 30 is placed into the movable groove through the opening 51 at the top of the sliding groove 5. The wedge block 30 abuts against the side plate 4112 of the movable part 411 in the sliding groove 5, thereby restricting the displacement of the movable part 411. Figure 6 , Figure 7 This allows the telescopic component 41 to extend and lock, so that the support rod 4 can be effectively supported on the first horizontal beam 1.

[0088] When the telescopic member 41 retracts, the wedge block 30 in the sliding groove 5 is removed, and then the side plate 4112 of the movable part 411 is controlled to move backward until the movable part 411 is completely separated from the first horizontal beam 1 so that the support rod 4 can be removed from the first horizontal beam 1.

[0089] Furthermore, such as Figure 8 , Figure 11 As shown, the bottom of the sliding groove 5 near the base 4124 has a through hole 52, the area of ​​which is smaller than the area of ​​the opening 51.

[0090] At one end of the sliding groove 5 near the base 4124, an opening 51 is formed at its top, and a through hole 52 is provided at its bottom. The area of ​​the through hole 52 is smaller than the area of ​​the opening 51. When the wedge block 30 is placed, the small end of the wedge block 30 can be inserted into the through hole 52, thereby facilitating the fixing of the wedge block 30. Figure 6 ;

[0091] In this embodiment, multiple wedge-shaped blocks 30 are provided in the opening 51. The small end of one wedge-shaped block 30 is inserted into the through hole 52, and its inclined surface abuts against the inclined surface of another wedge-shaped block 30. By pressing down the wedge-shaped block 30 inserted into the through hole 52, the lateral area of ​​the two abutting wedge-shaped blocks 30 is increased, allowing the wedge-shaped block 30 to abut against and lock against the side plate 4112 located in the sliding groove 5. Figure 6 This restricts the sliding of the side plate 4112, limits the displacement of the movable part 411, and causes the telescopic member 41 to extend and lock.

[0092] In optional implementations, such as Figure 10 As shown, a grooved component 8 is provided inside the support box 412, and the jack 413 is installed on the grooved component 8.

[0093] In optional implementations, such as Figure 9 As shown, the support box 412 has an opening 6 between the top plate 4122 and the base 4124. The opening 6 is connected to the interior of the support box 412. A pad 40 is placed between the jack 413 and the base 4124 through the opening 6. Figure 7 This allows for control of the position of the jack 413 within the support box 412.

[0094] In optional implementations, such as Figure 5 , Figure 8 As shown, the fixed section component 42 includes a steel pipe 421 and flanges 422 connected to both ends of the steel pipe 421. One end of the fixed section component 42 is detachably connected to the second horizontal beam 2 via the flanges 422.

[0095] Specifically, flange 422 is bolted to the second horizontal beam 2;

[0096] The other end of the fixed section component 42 is bolted to the movable part 411 via flange 422.

[0097] In an optional implementation, the first horizontal beam 1 is a steel waler.

[0098] In an optional embodiment, the second horizontal beam 2 is a steel waler.

[0099] In an optional embodiment, grooved plates 3 are spaced along the length of the first horizontal beam 1.

[0100] Example 2

[0101] like Figure 2 As shown, based on Embodiment 1, this embodiment discloses a support structure for an open-cut foundation pit, which also includes a fall arrestor group 9. The fall arrestor group 9 is used to suspend the first horizontal beam 1, the second horizontal beam 2 and the support rod 4.

[0102] By setting up the fall arrestor group 9, the first horizontal beam 1, the second horizontal beam 2 and the support rod 4 are suspended. If the first horizontal beam 1, the second horizontal beam 2 and the support rod 4 fall off due to accidental collision or construction reasons, the fall arrestor group 9 will provide suspension protection.

[0103] In optional implementations, such as Figure 3 , Figure 5 As shown, the fall arrestor assembly 9 includes:

[0104] The first anti-fall bar 91 is used to suspend the first horizontal beam 1;

[0105] The second anti-fall bar 92 is used to suspend the second horizontal beam 2;

[0106] The third anti-fall bar 93 is used to suspend the telescopic component 41;

[0107] The fourth anti-fall bar 94 is used to suspend the fixed section component 42.

[0108] Furthermore, such as Figure 14 As shown, the fall arrestor includes a pre-embedded part 901, a first connecting rod 902, a turnbuckle 903, and a second connecting rod 904 connected in sequence.

[0109] The embedded part 901 is embedded in the enclosure structure 100. The end of the embedded part 901 is connected to the first connecting rod 902. The first connecting rod 902 and the second connecting rod 904 are connected to the two ends of the turnbuckle 903. By rotating the sleeve of the turnbuckle 903, the extension and shortening of the turnbuckle 903 can be controlled, thereby adjusting the length of the fall arresting rod and making the fall arresting rod tighten or loosen.

[0110] Specifically, the embedded part 901 includes an embedded bolt and an L-shaped steel plate. The embedded bolt is embedded in the enclosure structure 100, and the end of the embedded bolt is connected to the L-shaped steel plate. The hook at one end of the first connecting rod 902 is hung on the L-shaped steel plate, and the hook at the other end of the first connecting rod 902 is hung on the upper hook of the turnbuckle 903. The hook at one end of the second connecting rod 904 is hung on the lower hook of the turnbuckle 903, and the hook at the other end of the second connecting rod 904 is used to connect with related components.

[0111] In an optional configuration, a first lifting ring 20 is provided at one end of the fixed section member 42 near the second horizontal beam 2, and the first lifting ring 20 is used to connect to the second anti-fall bar 92;

[0112] The telescopic component 41 is provided with a second lifting ring 50 at one end near the first horizontal beam 1. The second lifting ring 50 is used to connect with the first anti-fall rod 91.

[0113] Example 3

[0114] Based on Embodiment 1 or Embodiment 2, this embodiment discloses a support system for an open-cut foundation pit, including a retaining structure 100 and a support structure as described in Embodiment 1 or Embodiment 2. A first horizontal beam 1 and a second horizontal beam 2 are respectively connected to two opposite sides of the retaining structure 100. A support rod 4 is installed between the first horizontal beam 1 and the second horizontal beam 2, and the support rod 4 is used to support the first horizontal beam 1 and the second horizontal beam 2.

[0115] By setting a first horizontal beam 1 and a second horizontal beam 2 on two opposite sides of the retaining structure 100, and then installing a support rod 4 between the first horizontal beam 1 and the second horizontal beam 2, the support rod 4 supports the first horizontal beam 1 and the second horizontal beam 2, thereby effectively supporting and protecting the retaining structure 100 and ensuring the safety of the foundation pit construction.

[0116] In optional implementations, such as Figures 3-5 As shown, tripods 8 are installed at the bottom of the first horizontal beam 1 and the second horizontal beam 2. The top of the tripods 8 abuts against the first horizontal beam 1 and the second horizontal beam 2, and the side of the tripods 8 is connected to the enclosure structure 100 by pre-embedded bolts.

[0117] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support structure for an open cut excavation, characterised in that, include: A first horizontal beam (1) and a second horizontal beam (2) are arranged opposite to each other, and a grooved plate (3) is embedded on the side of the first horizontal beam (1) closer to the second horizontal beam (2); A support rod (4) is located between the first horizontal beam (1) and the second horizontal beam (2). The support rod (4) includes a telescopic member (41) and a fixed section member (42) connected to each other. The end of the fixed section member (42) away from the telescopic member (41) is detachably connected to the second horizontal beam (2). The end of the telescopic member (41) away from the fixed section member (42) abuts against the groove plate (3).

2. A support structure for an open cut excavation according to claim 1 wherein, The grooved plate (3) has a grooved area (31); The telescopic member (41) includes a movable part (411) and a support box (412). The movable part (411) is slidably disposed in the support box (412), and the movable part (411) is used to abut against the bottom of the groove area (31).

3. A support structure for an open cut excavation according to claim 2 wherein, The flexible part (411) includes an end plate (4111) and two side plates (4112) connected to the end plate (4111); The support box (412) includes two side walls (4121) arranged opposite to each other. The side wall (4121) has a sliding groove (5) inside. The sliding groove (5) is arranged along the length direction of the side wall (4121). The side plate (4112) is slidably fitted in the sliding groove (5). The support box (412) is also equipped with a jack (413), and the piston rod of the jack (413) is connected to the end plate (4111).

4. A support structure for an open cut excavation according to claim 3 wherein, The support box (412) also includes a top plate (4122), a bottom plate (4123) and a base (4124). The top plate (4122), the bottom plate (4123) and the two side walls (4121) form a box-shaped component, and one end of the box-shaped component is connected to the base (4124). The sliding groove (5) has an opening (51) at the top near the base (4124), and a wedge block (30) is placed in the opening (51). The wedge block (30) is used to clamp the side plate (4112) in the sliding groove (5).

5. A support structure for an open cut excavation according to claim 4 wherein, The sliding groove (5) has a through hole (52) at the bottom near the base (4124), and the area of ​​the through hole (52) is smaller than the area of ​​the opening (51).

6. A support structure for an open cut excavation according to claim 1 wherein, The fixed section component (42) includes a steel pipe (421) and flanges (422) connected to both ends of the steel pipe (421).

7. A support structure for an open cut excavation according to any one of claims 1 to 6, wherein, It also includes a fall arrestor assembly (9), which is used to suspend the first horizontal beam (1), the second horizontal beam (2) and the support rod (4).

8. A support structure for an open cut excavation according to claim 7 wherein, The fall arrestor assembly (9) includes: The first anti-fall bar (91) is used to suspend the first horizontal beam (1); The second anti-fall bar (92) is used to suspend the second horizontal beam (2); The third anti-fall bar (93) is used to suspend the telescopic component (41); The fourth anti-fall bar (94) is used to suspend the fixed section component (42).

9. A support structure for an open cut excavation according to claim 8 wherein, The fall arrestor includes a pre-embedded part (901), a first connecting rod (902), a turnbuckle (903), and a second connecting rod (904) connected in sequence.

10. A support system for an open cut excavation, characterised in that, The enclosure includes an enclosure structure (100) and a support structure as described in any one of claims 1-9, wherein the first horizontal beam (1) and the second horizontal beam (2) are respectively connected to two opposite sides of the enclosure structure (100), and the support rod (4) is installed between the first horizontal beam (1) and the second horizontal beam (2), and the support rod (4) is used to support the first horizontal beam (1) and the second horizontal beam (2).

Images