Bracket type support changing structure suitable for foundation pit support

Abstract

The utility model discloses a bracket type support changing structure suitable for foundation pit supporting, and belongs to the technical field of underground foundation pits, the bracket type support changing structure comprises a support changing bracket, the support changing bracket is arranged in a fat groove, a first supporting surface, facing a supporting structure, of the support changing bracket extends in the vertical direction, and the first supporting surface abuts against the inner wall surface of the supporting structure; a second supporting face, facing the bottom plate of the basement, of the support changing bracket extends in the vertical direction, and the second supporting face abuts against part of or all the side wall face of the bottom plate; and a connecting surface is arranged between the first supporting surface and the second supporting surface. The utility model provides a bracket type support changing structure suitable for foundation pit support, which can adapt to the load form of a deep foundation pit, can stably transmit the load of a support structure to a basement bottom plate to ensure the stability of the support structure, and can reduce the occupation of the support changing structure on the internal space of a basement. The construction work amount can be reduced while basement construction is facilitated, and then the construction difficulty and the construction cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground foundation pits, and particularly relates to a corbel type replacement bracing structure suitable for foundation pit bracing. Background Art

[0002] With the research and development of urban underground engineering, deep and large foundation pits are becoming more and more widespread in engineering construction. When the foundation pit is deep, the geological conditions are poor, and the surrounding environment is relatively tense, etc., vertical retaining members such as cast-in-place piles and diaphragm walls are usually set, and horizontal internal bracing is used to support on the vertical retaining structure to prevent the vertical retaining structure from toppling inward to the foundation pit. However, when the basement structure is gradually poured upward, the horizontal internal bracing will hinder the continuous upward pouring of the basement structure. At this time, the horizontal internal bracing needs to be removed. Before removing the horizontal internal bracing, a replacement bracing structure needs to be set up to replace the original horizontal internal bracing to prevent the vertical retaining structure from toppling inward to the foundation pit, and the replacement bracing structure does not affect the construction of the basement structure.

[0003] The commonly used replacement bracing structure is to set horizontal bracing members in the backfill groove between the basement exterior wall that has been constructed under the horizontal bracing and the vertical retaining member, and the horizontal internal bracing is generally set at the position of the structural floor slab to ensure that the replacement bracing member can normally transfer the load to the structural floor slab. However, in some structures, the basement floor slab is located above the horizontal internal bracing, or there is no floor slab structure, resulting in the inability to normally transfer the replacement bracing load. At this time, horizontal bracing, that is, inverted bracing, is usually set at the corresponding elevation position inside the basement structure to meet the safety and stability requirements of the vertical retaining member. The inverted bracing member will increase the project cost and construction period, and later it needs to be removed in the narrow cavity of the basement, and the construction difficulty is relatively large. Summary of the Utility Model

[0004] In view of one or more of the above defects or improvement requirements in the prior art, the utility model provides a corbel type replacement bracing structure suitable for foundation pit bracing, which can adapt to the load form of deep foundation pits, not only can stably transfer the load of the bracing structure to the basement floor slab to ensure the stability of the bracing structure, but also can reduce the occupation of the internal space of the basement by the replacement bracing structure, facilitate the construction of the basement while reducing the construction workload, and further reduce the construction difficulty and project cost.

[0005] To achieve the above object, the utility model provides a corbel type replacement bracing structure suitable for foundation pit bracing, which is arranged in the backfill groove between the bracing structure and the basement side wall, and includes:

[0006] At least one replacement bracing corbel, each of the replacement bracing corbels is arranged in the backfill groove, and a first support surface of each replacement bracing corbel facing the bracing structure extends vertically, and the first support surface abuts against the inner wall surface of the bracing structure;

[0007] Each of the replacement support brackets extends vertically along the second support surface facing the bottom plate of the basement, and the second support surface abuts against part or all of the side wall surface of the bottom plate;

[0008] A connecting surface is provided between the first support surface and the second support surface, and end surfaces are provided at the ends of the first support surface and the second support surface along the first direction;

[0009] The height of the first support surface in the vertical direction is greater than the height of the second support surface in the vertical direction.

[0010] As a further preference of the present utility model, the bottom plate is of a square structure, and at least one replacement support bracket is provided in the fat groove on one side of each single side of the bottom plate.

[0011] As a further preference of the present utility model, the bottom plate is of a circular structure, and at least three replacement support brackets are evenly spaced along the circumferential direction on the outer side of the bottom plate.

[0012] As a further preference of the present utility model, at least one horizontal support beam extending in the horizontal direction is further provided on the top end surface of the support structure.

[0013] As a further preference of the present utility model, the vertical dimension of the first support surface is one-sixth to one-third of the vertical dimension of the support structure.

[0014] As a further preference of the present utility model, the dimension of the first support surface along the first direction is not greater than the dimension of the support structure in the first direction;

[0015] The dimension of the second support surface along the first direction is not greater than the dimension of the bottom plate in the first direction.

[0016] As a further preference of the present utility model, the connecting surface is an inclined surface or a stepped surface; or, the cross section of the replacement support bracket is trapezoidal.

[0017] As a further preference of the present utility model, the replacement support bracket further includes a support steel bar mesh, the support steel bar mesh includes several steel bars corresponding to the first support surface, the second support surface and the connecting surface, and adjacent two steel bars are fixed to each other.

[0018] As a further preference of the present utility model, the cross section of the replacement support bracket is trapezoidal, and diagonal steel bars are arranged diagonally in the replacement support bracket.

[0019] As a further preference of the present utility model, at least one bracket inserting bar is further provided between the replacement support bracket and the bottom end surface of the fat groove.

[0020] Generally speaking, compared with the prior art, the beneficial effects of the above technical solution conceived by the present utility model include:

[0021] (1) The bracket - type load - transfer structure applicable to foundation pit support of the present utility model includes load - transfer brackets. The load - transfer brackets are all arranged in the cushion cap. The first supporting surface of the load - transfer bracket facing the supporting structure extends vertically, and the first supporting surface abuts against the inner wall surface of the supporting structure; the second supporting surface of the load - transfer bracket facing the basement floor extends vertically, and the second supporting surface abuts against part or all of the side wall surface of the floor; a connecting surface is arranged between the first supporting surface and the second supporting surface. This bracket - type load - transfer structure can adapt to the load form of deep foundation pits. It can not only stably transfer the load of the supporting structure to the basement floor to ensure the stability of the supporting structure, but also reduce the occupation of the internal space of the basement by the load - transfer structure, facilitate the construction of the basement while reducing the construction workload, and thus reduce the construction difficulty and project cost.

[0022] (2) The bracket - type load - transfer structure applicable to foundation pit support of the present utility model forms a stable steel - bar support network inside the load - transfer bracket by arranging several steel bars corresponding to the first supporting surface, the second supporting surface and the connecting surface respectively in the load - transfer bracket and combining the stable fixation between adjacent steel bars. At the same time, by arranging diagonal steel bars at the top of the first supporting surface and the bottom of the second supporting surface, the load in the middle of the first supporting surface can be stably transferred to the floor through the diagonal steel bars, and combined with several bracket reinforcing bars extending in the vertical direction between the load - transfer floor and the cushion - cap floor, the stability of the load transfer of the load - transfer bracket is further improved.

[0023] (3) The bracket - type load - transfer structure applicable to foundation pit support of the present utility model has a simple structure, stable support and convenient construction. By arranging load - transfer brackets with the first supporting surface abutting against the supporting structure and the second supporting surface abutting against the floor in the cushion cap, the load from the rock and soil borne by the supporting structure can be stably transferred to the floor through the load - transfer brackets. Combined with several load - transfer brackets evenly arranged in the cushion cap around the floor, the loads in all directions of the supporting structure can be stably transferred to the floor through the load - transfer brackets, and the load from the supporting structure can be balanced on the floor, thus ensuring the structural stability of the entire foundation pit. At the same time, by increasing the height of the first supporting surface, the load in the middle of the supporting structure can also be stably transferred through the load - transfer brackets. And, combined with the second supporting surface abutting against the side wall surface of the floor and part or all of the inclined connecting surface, the load - transfer bracket can reserve space for the construction of the side - wall waterproof layer while stably transferring the load, and has good popularization value and application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is the overall structural schematic diagram of the bracket - type replacement bracing structure applicable to foundation pit support in the embodiments of the present utility model.

[0025] In all the drawings, the same reference numerals represent the same technical features. Specifically:

[0026] 1. Replacement bracing bracket; 11. First support surface; 12. Second support surface; 13. Connection surface; 14. Steel bars; 15. Diagonal bars; 16. Bracket inserted bars

[0027] 2. Support structure; 21. Horizontal support beam

[0028] 3. Basement; 31. Floor slab; 32. Side wall Detailed implementation manners

[0029] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0034] Embodiment:

[0035] Please refer to Figure 1 , the bracket - type replacement strut structure applicable to foundation pit support in the preferred embodiment of the present utility model can adapt to the load form of deep foundation pits. It can not only stably transfer the load of the support structure 2 to the bottom plate 31 of the basement 3, ensuring the stability of the support structure 2, but also reduce the occupation of the internal space of the basement 3 by the replacement strut structure. While facilitating the construction of the basement 3, it can also reduce the construction workload, thereby reducing the construction difficulty and project cost.

[0036] Specifically, in the preferred embodiment of the present application, the bracket - type replacement strut structure is arranged in the waste slot between the support structure 2 and the side wall of the basement 3 to facilitate the formation of a stable support for the support structure 2. The bracket - type replacement strut structure includes at least one replacement strut bracket 1. Each replacement strut bracket 1 is arranged in the waste slot, and the first support surface 11 of each replacement strut bracket 1 facing the support structure 2 extends vertically, and this first support surface 11 is in contact with the inner wall surface of the support structure 2, so that the soil layer load borne by the support structure 2 can be transferred to the replacement strut bracket 1 through this first support surface 11. The second support surface 12 of each replacement strut bracket 1 facing the bottom plate 31 of the basement 3 also extends in the vertical direction. Correspondingly, the second support surface 12 abuts against part or all of the side wall surface of the bottom plate 31, so that the load from the support structure 2 borne by the replacement strut bracket 1 on the first support surface 11 can be stably transferred to the bottom plate 31 of the basement 3 through this replacement strut bracket 1, thereby enhancing the stability of the support structure 2 in bearing the soil layer load.

[0037] Furthermore, a connecting surface 13 is provided between the first supporting surface 11 and the second supporting surface 12. Preferably, the connecting surface 13 is provided at the top ends of the first supporting surface 11 and the second supporting surface 12. Correspondingly, end faces are provided at both ends of the first supporting surface 11 and the second supporting surface 12 in the first direction, so as to facilitate the formation of the closed replacement support bracket 1 structure. Moreover, in order to ensure that the first supporting surface 11 provides stable support for the supporting structure 2, on each replacement support bracket 1, the height of the first supporting surface 11 in the vertical direction is greater than the height of the second supporting surface 12 in the vertical direction.

[0038] It should be noted that, in the preferred embodiment of the present application, the interval direction between the two end faces at both ends of the first supporting surface 11 and the second supporting surface 12 of the replacement support bracket 1 is the first direction, that is, the width direction of the bottom plate 31. In the horizontal plane, the direction perpendicular to the first direction is the second direction, that is, the second direction is the interval direction between the first supporting surface 11 and the second supporting surface 12, and the second direction is also the length direction of the bottom plate 31. The direction perpendicular or plumb to the horizontal plane is the vertical direction, which is also the third direction.

[0039] Further preferably, in the preferred embodiment of the present application, in order to achieve stable support for the supporting structures 2 with different shapes and sizes, when the bottom plate 31 is a square structure, correspondingly, the inner wall surface of the supporting structure 2 is also a corresponding square structure. For the bottom plate 31 and the supporting structure 2 corresponding to this structure, at least one replacement support bracket 1 is provided in the waste trench on one side of each single side of the bottom plate 31. Preferably, at least two replacement support brackets 1 are spaced apart in the waste trench on one side of each single side of the bottom plate 31, so that the load borne by the inner wall surface on each side of the supporting structure 2 can be transmitted to the bottom plate 31 through the replacement support bracket 1, thereby ensuring the stability of the entire supporting structure 2.

[0040] When the bottom plate 31 is a circular structure, correspondingly, the inner wall surface of the supporting structure 2 is also a corresponding circular structure. For the bottom plate 31 and the supporting structure 2 corresponding to this structure, at least three replacement support brackets 1 are evenly spaced along the circumferential direction in the annular waste trench outside the bottom plate 31, so that the load of the supporting structure 2 can be stably transmitted to the bottom plate 31 through the replacement support brackets 1 evenly spaced along the circumferential direction.

[0041] Of course, the setting form of the bottom plate 31 is not limited to the above structural form. In another preferred embodiment of the present application, the bottom plate 31 and the support structure 2 can also be irregular structures. For example, one side of the bottom plate 31 is semi-circular and the other side is square. In the backfill trench corresponding to the semi-circular area of the bottom plate 31, the replacement support corbels 1 are arranged evenly along the circumference; while in the backfill trench corresponding to the square area of the bottom plate 31, the replacement support corbels 1 are respectively arranged for each single side of the bottom plate 31 to ensure that the replacement support corbels 1 can provide stable support for the support structure 2. That is, as long as the support system formed by the respective replacement support corbels 1 arranged in the backfill trench can achieve stable support for the support structure 2, the arrangement of the replacement support corbels 1 belongs to the embodiments that can be realized by the corbel-type replacement support structure of the present application.

[0042] Furthermore, in a preferred embodiment of the present application, to ensure the stability of the top of the support structure 2, at least one horizontally arranged horizontal support beam 21 is provided at the top of the support structure 2. The horizontal support beam 21 spans the top opening of the support structure 2, and both ends of the horizontal support beam 21 abut against the inner wall surface of the opening of the support structure 2, so that the load of the support structure 2 can be balanced by means of the horizontal support beam 21 to ensure the stability of the top of the support structure 2. In combination with the replacement support corbels 1 arranged in the backfill trench, the load at the bottom of the support structure 2 is carried by means of the replacement support corbels 1, and then the overall stable support of the support structure 2 is completed to ensure the stability of the entire support structure 2. Preferably, the horizontal support beam 21 is in a cross-shaped or grid-shaped structure so that the horizontal support beam 21 can achieve stable support for the load at the opening of the support structure 2.

[0043] Furthermore, in a preferred embodiment of the present application, the support structure 2 is a support pile and / or a diaphragm wall.

[0044] Further preferably, in a preferred embodiment of the present application, the vertical dimension of the first support surface 11 is between one-sixth and one-third of the vertical dimension of the support structure 2 to ensure that the replacement support corbel 1 can provide a support surface closer to the vertical center position of the support structure 2 by means of the first support surface 11, so that the geotechnical load borne by the support structure 2 can be stably transmitted to the replacement support corbel 1 to ensure the stability of the support structure 2 in bearing the soil and rock.

[0045] Furthermore, in a preferred embodiment of the present application, the dimension of the first support surface 11 in the first direction is not greater than the dimension of the support structure 2 in the first direction to ensure that the first support surface 11 can closely adhere to the inner wall surface of the support structure 2, so that the load of the support structure 2 can be stably transmitted to the replacement support corbel 1.

[0046] Further, in a preferred embodiment of the present application, the dimension of the second support surface 12 in the first direction is not greater than the dimension of the bottom plate 31 in the first direction, so that the second support surface 12 can stably transfer the load borne by the replacement support corbel 1 to the bottom plate 31 uniformly through the entire surface area, further improving the stability of the support structure 2 during the process of bearing the geotechnical load.

[0047] Further preferably, in a preferred embodiment of the present application, since the side wall 32 of the basement 3 needs to be constructed along the outer periphery on the top surface of the bottom plate 31 of the basement 3, and after the side wall 32 of the basement 3 is constructed, a corresponding waterproof layer is usually required to be arranged outside the side wall 32 of the basement 3. In order to avoid the influence of the replacement support corbel 1 on the construction of the waterproof layer on the side wall 32, the connecting surface 13 between the first support surface 11 and the second support surface 12 adopts an inclined surface or a stepped surface structure, so that a certain distance can be formed between the replacement support corbel 1 and the side wall, facilitating the construction of the waterproof layer on the side wall 32 of the basement 3.

[0048] Certainly, the connecting surface 13 between the first support surface 11 and the second support surface 12 is not limited to the above structural form. In another preferred embodiment of the present application, the cross-section of the replacement support corbel 1 is trapezoidal, that is, the connecting surface 13 includes a horizontal surface and an inclined surface, which can also form a certain distance between the replacement support corbel 1 and the side wall on the premise of ensuring the stable support of the replacement support corbel 1, and can also facilitate the construction of the waterproof layer on the side wall 32 of the basement 3.

[0049] Further, in a preferred embodiment of the present application, the replacement support corbel 1 further includes a support steel mesh. Specifically, the support steel mesh includes a plurality of steel bars 14 corresponding to the first support surface 11, the second support surface 12, and the connecting surface 13, and adjacent steel bars 14 overlap each other, thereby forming a mutually connected support steel mesh in the replacement support corbel 1 to ensure the load transfer capacity of the replacement support corbel 1.

[0050] Further preferably, in a preferred embodiment of the present application, multiple layers of support steel bars 14 are respectively arranged in the first direction, the second direction, and the third direction on the first support surface 11 and the connecting surface 13, and adjacent steel bars 14 are fixed to each other, further improving the load-bearing strength of the replacement support corbel 1.

[0051] More specifically, in the preferred embodiment of the present application, the load of the support structure 2 is transmitted from the first support surface 11 to the second support surface 12, and the height of the second support surface 12 in the vertical direction is significantly lower than that of the first support surface 11. Therefore, in order to ensure that the support structure 2 at a higher vertical height can stably transmit the load to the bottom plate 31, when the cross-section of the replacement support bracket 1 is trapezoidal, diagonal bars 15 are arranged along the diagonal positions in the replacement support bracket 1. Preferably, one end of the diagonal bar 15 is connected to the top of the first support surface 11, and correspondingly, the other end of the diagonal bar 15 is connected to the bottom of the second support surface 12, further improving the stability of the load transmission between the support structures 2.

[0052] Further, in the preferred embodiment of the present application, at least one bracket reinforcing bar 16 is also arranged between the bottom end surface of the replacement support bracket 1 and the bottom end surface of the backfill trench, so as to improve the shear resistance of the replacement support bracket 1 through the bracket reinforcing bar 16.

[0053] The bracket-type replacement support structure applicable to foundation pit support in the present utility model has a simple structure, stable support, and convenient construction. By arranging the replacement support bracket 1 with the first support surface 11 abutting against the support structure 2 and the second support surface 12 abutting against the bottom plate 31 in the backfill trench, the load from the rock and soil borne by the support structure 2 can be stably transmitted to the bottom plate 31 through the replacement support bracket 1. Combined with a number of replacement support brackets 1 evenly arranged in the backfill trench around the corresponding bottom plate 31, the loads in all directions of the support structure 2 can be stably transmitted to the bottom plate 31 through the replacement support brackets 1, and the load from the support structure 2 is balanced on the bottom plate 31, thereby ensuring the structural stability of the entire foundation pit. At the same time, by increasing the height of the first support surface 11, the load in the middle of the support structure 2 can also be stably transmitted by means of the replacement support bracket 1. Moreover, combined with the second support surface 12 abutting against the side wall surface of the bottom plate 31 and the partially or fully inclined connecting surface 13, the replacement support bracket 1 can reserve space for the construction of the side wall waterproof layer while stably transmitting the load, and has good popularization value and application prospect.

[0054] It is easy for those skilled in the art to understand that 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 replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bracket type replacement strut structure applicable to foundation pit support, which is arranged in the fat groove between the support structure and the basement side wall, and is characterized in that, Comprising: At least one replacement strut corbel, each of the replacement strut corbels is arranged in the fat groove, each of the replacement strut corbels extends vertically along the first support surface facing the retaining structure, and the first support surface abuts against the inner wall surface of the retaining structure; Each of the replacement strut corbels extends vertically along the second support surface facing the bottom plate of the basement, and the second support surface abuts against part or all of the side wall surface of the bottom plate; A connecting surface is arranged between the first support surface and the second support surface, and end surfaces are arranged at the ends of the first support surface and the second support surface along the first direction; The height of the first support surface in the vertical direction is greater than the height of the second support surface in the vertical direction.

2. The bracket-type replacement bracing structure applicable to foundation pit bracing according to claim 1, wherein, The bottom plate is of a square structure, and at least one replacement strut corbel is arranged in the fat groove on one side of each single side of the bottom plate.

3. The corbel type replacement bracing structure applicable to foundation pit bracing according to claim 1, wherein, The bottom plate is of a circular structure, and at least three replacement strut corbels are arranged at equal intervals along the circumference on the outer side of the bottom plate.

4. The bracket-type replacement bracing structure applicable to foundation pit bracing according to any one of claims 1 to 3, wherein, At least one horizontal support beam extending in the horizontal direction is further arranged on the top end surface of the retaining structure.

5. The bracket-type replacement bracing structure applicable to foundation pit bracing according to any one of claims 1 to 3, wherein, The vertical dimension of the first support surface is one-sixth to one-third of the vertical dimension of the retaining structure.

6. The corbel type replacement strut structure applicable to foundation pit support according to any one of claims 1 to 3, wherein, The dimension of the first support surface along the first direction is not greater than the dimension of the retaining structure along the first direction; The dimension of the second support surface along the first direction is not greater than the dimension of the bottom plate along the first direction.

7. The bracket type strut-changing structure applicable to foundation pit support according to any one of claims 1 to 3, wherein, The connecting surface is an inclined surface or a stepped surface; or, the cross section of the replacement strut corbel is trapezoidal.

8. The corbel type replacement bracing structure applicable to foundation pit bracing according to claim 7, wherein, The replacement strut corbel further includes a support steel bar mesh, the support steel bar mesh includes several steel bars corresponding to the first support surface, the second support surface and the connecting surface, and adjacent two steel bars are fixed to each other.

9. The bracket type replacement bracing structure applicable to foundation pit bracing according to claim 8, wherein, The cross section of the replacement strut corbel is trapezoidal, and diagonal steel bars are arranged diagonally in the replacement strut corbel.

10. The bracket type strut replacement structure applicable to foundation pit support according to any one of claims 1 to 3, 8, and 9, wherein, At least one corbel reinforcing bar is further arranged between the replacement strut corbel and the bottom end surface of the fat groove.

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