Foundation pit support inner support advanced segmented dismantling support structure

Abstract

The utility model discloses a foundation pit support inner support advanced segmented dismantling support structure which comprises a pile, a bearing platform arranged on the pile, a wall-attached column arranged on the bearing platform and an inclined column connected to the wall-attached column, and the end, away from the wall-attached column, of the inclined column is connected with the bearing platform on the side, away from an outer wall, of the wall-attached column. The batter post comprises a steel reinforcement framework and outer concrete, one end of the steel reinforcement framework extends into the bearing platform, and the other end of the steel reinforcement framework extends into the wall-attached post. According to the construction method, the mode that the diagonal bracings are additionally arranged in the basement for supporting is innovatively used, the diagonal bracings are poured together with the main body structure, after the strength meets the requirement, the inner support can be disassembled in a segmented mode, and under the working conditions that a complete and overall closed structure is not formed in the basement structure and conventional support replacement cannot be conducted, the inner support can be disassembled; the inclined struts are additionally arranged to offset lateral soil pressure transmitted to the outer wall by the soil body, so that the inner supports can be demounted in sections under the working conditions, the phenomenon of idling of workers during construction section line production is avoided, the construction progress can be accelerated, meanwhile, the frame body investment can be reduced, and the lease cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a support structure for early segmented removal of inner supports of foundation pit support. Background Art

[0002] With the development of the national economy and people's pursuit of material and spiritual life, some high-rise buildings have quietly stood up, and the deeper foundation and underground structure projects that followed have greatly increased the difficulty of construction. Some underground structures are buried more than 20 meters deep, and the requirements for foundation pit support are very high. How to ensure the reliability of foundation pit support is the key. As a component of common support forms, internal support often appears in foundation pit support projects. Reinforced concrete internal support beams are a transitional support system. When the project construction reaches a certain level, this temporary support system will be completely dismantled. How to replace the support before dismantling the internal support to ensure the safety of the foundation pit and the normal construction of the basement is a difficult point in the foundation pit support construction. It is also a reliable guarantee for the quality, construction period and safety of underground engineering construction.

[0003] The internal support of conventional foundation pit support is a system of angle support + connecting beam and horizontal support. To remove the internal support, the load-bearing components in the load direction must be replaced at the same time, that is, the basement structure and the replacement support beam, replacement support waist beam, and force transfer rod below the corresponding internal support projection must be completed and the strength must meet the design requirements to ensure the safety of the foundation pit. This requires that the internal support can only be removed after the construction of the basement floor, wall columns and floor slabs is completed. Generally, basement construction requires segmented flow construction. In this way, the internal support cannot be removed in time and the upper operation cannot be continued, which will lead to idle work and affect the construction period. Utility Model Content

[0004] The utility model provides a support structure for early segmental removal of inner supports of foundation pit support, which solves the problem that when the basement structure has not formed a complete overall closed structure and conventional support replacement cannot be performed, the purpose of segmented removal of inner supports can be achieved by adding diagonal supports.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model discloses a foundation pit support inner support early segmented removal support structure, comprising a pile, a cap arranged on the pile, a wall column arranged on the cap, and an inclined column connected to the wall column, wherein one end of the inclined column away from the wall column is connected to the cap on the side of the wall column away from the outer wall;

[0007] The inclined column comprises a steel frame and an outer layer of concrete, one end of the steel frame extends into the pedestal, and the other end extends into the wall column.

[0008] The utility model provides a foundation pit support inner support early segmented removal support structure, further, the steel skeleton comprises main bars and stirrups installed on the periphery of the main bars.

[0009] The utility model provides a support structure for early segmental removal of the inner support of a foundation pit support. Furthermore, the upper end of the main reinforcement extends into the attached wall column, and the lower end extends into the pedestal.

[0010] The utility model provides a support structure for early segmental removal of the inner support of a foundation pit support. Furthermore, the main reinforcement is extended to one end of the wall column and bent upward to form a vertical section; the main reinforcement is extended into the pedestal along its length direction.

[0011] The utility model provides a support structure for early segmental removal of the inner support of a foundation pit support. Furthermore, a structural column is provided on a pedestal located on the inner side of the attached wall column, a structural beam is connected between the attached wall column and the structural column, and an intersection portion exists between the inclined column and the structural beam.

[0012] The utility model provides a support structure for early segmental removal of inner supports of foundation pit support. Furthermore, the width of the inclined column is the same as the width of the wall-attached column, and the height of the inclined column is twice the width.

[0013] The utility model provides a support structure for early segmental removal of the inner support of a foundation pit support. Furthermore, the top and bottom surfaces of the inclined columns are provided with intermediate steel bars at the middle positions, and tension bars are connected between the intermediate steel bars.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] This application innovatively uses a method of adding diagonal bracing to the basement. The diagonal bracing is cast together with the main structure. After the strength meets the requirements, the internal support can be removed in sections. When the basement structure has not formed a complete closed structure and conventional support replacement is not possible, the lateral earth pressure transmitted to the outer wall by the soil is offset by adding diagonal bracing, thereby achieving the segmented removal of the internal support under the above-mentioned working conditions, avoiding the phenomenon of idle work during segmented construction, speeding up the construction progress, and at the same time reducing the investment in the frame and the rental costs.

[0016] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of cross section 1-1.

[0019] Reference numerals:

[0020] 1. Piles; 2. Capping platform; 3. Attached wall columns; 4. Inclined columns; 5. Outer concrete; 6. Main reinforcement; 7. Stirrups; 8. Vertical sections; 9. Structural columns; 10. Structural beams; 11. Intermediate reinforcement; 12. Tie bars. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 2 As shown, the utility model discloses a support structure for early segmented removal of the inner support of a foundation pit support, comprising a pile 1, a cap 2 arranged on the pile 1, a wall column 3 arranged on the cap 2, and an inclined column 4 connected to the wall column 3, wherein one end of the inclined column 4 away from the wall column 3 is connected to the cap 2 on the side of the wall column 3 facing away from the outer wall.

[0022] The inclined column 4 is a reinforced concrete structure, which includes a steel frame and an outer layer of concrete 5. One end of the steel frame extends into the base 2, and the other end extends into the wall column 3.

[0023] This application innovatively uses a method of adding diagonal bracing to the basement. The diagonal bracing is cast together with the main structure. After the strength meets the requirements, the internal support can be removed in sections. When the basement structure has not formed a complete closed structure and conventional support replacement is not possible, the lateral earth pressure transmitted to the outer wall by the soil is offset by adding diagonal bracing, thereby achieving the segmented removal of the internal support under the above-mentioned working conditions, avoiding the phenomenon of idle work during segmented construction, speeding up the construction progress, and at the same time reducing the investment in the frame and the rental costs.

[0024] Specifically, the steel bar skeleton includes main bars 6 and stirrups 7 installed on the periphery of the main bars 6. The upper end of the main bars 6 extends into the wall column 3, and the lower end extends into the cap 2. One end of the main bars 6 extending into the wall column 3 is bent upward to form a vertical section 8. The main bars 6 extend into the cap 2 along the length direction thereof. The supporting performance of the inclined column 4 is ensured to better bear the lateral soil pressure.

[0025] A structural column 9 is provided on the pedestal 2 located on the inner side of the wall column 3. A structural beam 10 is connected between the wall column 3 and the structural column 9. An intersection portion exists between the inclined column 4 and the structural beam 10 at the wall column 3 to ensure the installation height and supporting performance of the inclined column 4.

[0026] The width of the inclined column 4 is the same as that of the wall-attached column 3 , and the height of the inclined column 4 is twice the width, so as to ensure that the inclined column 4 is sufficient to bear the soil pressure.

[0027] Intermediate steel bars 11 are provided at the middle of the top and bottom surfaces of the inclined column 4 , and tie bars 12 are connected between the intermediate steel bars 11 as supplementary steel bars to enhance the force-bearing performance of the inclined column 4 .

[0028] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A foundation pit support inner support early segmented removal support structure, characterized by: It comprises a pile (1), a capping platform (2) arranged on the pile (1), a wall-attached column (3) arranged on the capping platform (2), and an inclined column (4) connected to the wall-attached column (3), wherein one end of the inclined column (4) away from the wall-attached column (3) is connected to the capping platform (2) on the side of the wall-attached column (3) facing away from the external wall; The inclined column (4) comprises a steel frame and an outer layer of concrete (5); one end of the steel frame extends into the pedestal (2), and the other end extends into the wall column (3).

2. The early segmented removal support structure for the inner support of the foundation pit support according to claim 1 is characterized by: The steel reinforcement skeleton comprises main reinforcement (6) and stirrups (7) installed on the periphery of the main reinforcement (6).

3. The early segmented removal support structure for the inner support of the foundation pit support according to claim 2 is characterized by: The upper end of the main reinforcement (6) extends into the wall column (3), and the lower end extends into the base (2).

4. The early segmented removal support structure for the inner support of the foundation pit support according to claim 3 is characterized by: The main reinforcement (6) extends to one end of the wall column (3) and is bent upward to form a vertical section (8); the main reinforcement (6) extends into the base (2) along its length direction.

5. The early segmented removal support structure for the inner support of the foundation pit support according to claim 4 is characterized by: A structural column (9) is provided on the pedestal (2) located inside the wall-attached column (3), a structural beam (10) is connected between the wall-attached column (3) and the structural column (9), and an intersecting portion exists between the inclined column (4) and the structural beam (10).

6. The early segmented removal support structure for the inner support of the foundation pit support according to claim 1 is characterized by: The width of the inclined column (4) is the same as that of the wall-attached column (3), and the height of the inclined column (4) is twice the width.

7. The early segmented removal support structure for the inner support of the foundation pit support according to claim 2 is characterized by: Intermediate steel bars (11) are provided at the middle positions of the top and bottom surfaces of the inclined column (4), and tie bars (12) are connected between the intermediate steel bars (11).

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