Inclined support temporary support replacing device for basement foundation pit

Abstract

The utility model provides an inclined support temporary support changing device for a basement foundation pit, a supporting structure is arranged in the foundation pit, and two ends of a horizontal supporting assembly are fixed on the supporting structure and stretch across the interior of the foundation pit; the basement structure comprises floor slabs and an outer wall which are sequentially constructed in a foundation pit, and a horizontal supporting assembly is correspondingly arranged on the upper side of each floor slab and the upper side of the outer wall. The inclined supporting assembly is correspondingly arranged on the lower side of the horizontal supporting assembly to be dismantled, one end is connected with the supporting structure, and the other end is connected with a corresponding floor on the lower side of the horizontal supporting assembly to be dismantled. After the construction of the corresponding floor is completed, the inclined supporting assembly is arranged between the supporting structure and the floor, supporting force provided by the inclined supporting assembly can equivalently replace a horizontal supporting assembly to be dismantled, and after the horizontal supporting assembly corresponding to the floor is dismantled, the stability and the bearing capacity of the foundation pit supporting structure are effectively guaranteed; deformation of the foundation pit and the surrounding environment is controlled, and safety of buildings (structures), underground pipelines and the like around the foundation pit is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit support engineering, in particular to an internal support structure. Background Art

[0002] At present, internal support structures are widely used in foundation pit support engineering. The internal support structure is generally to construct horizontal replacement support beams at the basement floor position after the foundation pit is excavated to the bottom of the pit, and then remove the support beams above the floor. Taking a three-story basement as an example, two internal supports are usually required. For example, after the conventional horizontal replacement support beam is constructed at the horizontal position of the negative second floor slab, the support beams above the negative second floor slab need to be removed accordingly.

[0003] However, when the height difference (calculated span) between the basement floor and the upper supporting beam is large, after constructing the horizontal replacement support beam at the basement floor position and removing the support according to conventional practice, the calculated span of the cantilever of the supporting piles above the top of the horizontal replacement support beam is large (usually greater than 6m), which may easily lead to excessive deformation of the pile top, thus affecting the safety of buildings and structures, underground pipelines, etc. around the foundation pit. Summary of the invention

[0004] Purpose of the invention: In view of the shortcomings of the prior art, a temporary replacement support device for inclined supports of a basement foundation pit is provided, which can provide a stable bearing capacity after the horizontal replacement support beam is removed.

[0005] Technical solution: The utility model discloses a temporary replacement device for inclined supports of a basement foundation pit, comprising:

[0006] A supporting structure, wherein the supporting structure is arranged in the foundation pit;

[0007] A horizontal support assembly, both ends of which are fixed on the supporting structure and span the foundation pit;

[0008] The basement structure includes floors and exterior walls of each layer constructed sequentially in the foundation pit, and each floor and exterior wall has a corresponding horizontal support assembly on its upper side;

[0009] A horizontal bracing assembly, which corresponds to each floor slab of the basement structure and connects the outer wall and the supporting structure;

[0010] An inclined support component is correspondingly arranged on the lower side of the horizontal support component to be removed, one end of the inclined support component is connected to the supporting structure, and the other end is connected to the corresponding floor slab on the lower side of the horizontal support component to be removed.

[0011] Furthermore, the angle between the inclined support assembly and the floor slab ranges from 30° to 45°.

[0012] Furthermore, the diagonal support assembly includes a diagonal support exchange beam and a corbel, and the diagonal support exchange beam is connected to the floor slab through the corbel.

[0013] Furthermore, the support mechanism structure includes support piles vertically arranged in the foundation pit.

[0014] Furthermore, the middle portion of the horizontal support assembly is supported by a column.

[0015] Furthermore, the columns are fixed by column piles at the bottom of the foundation pit.

[0016] Furthermore, the inclined support assembly is made of concrete or steel structure.

[0017] Furthermore, the cross-section of the horizontal support-changing assembly is rectangular.

[0018] Beneficial effect: After the construction of the corresponding floor is completed, the utility model sets an inclined support component between the support structure and the floor slab. The supporting force provided by the inclined support component can equivalently replace the horizontal support component to be removed. After the horizontal support component corresponding to the floor is removed, the stability and bearing capacity of the foundation pit support structure are effectively guaranteed, the deformation of the foundation pit and the surrounding environment is controlled, and the safety of buildings (structures), underground pipelines, etc. around the foundation pit is guaranteed. It is particularly suitable for foundation pit projects in which the cantilever calculated span of the support structure is large after the conventional replacement support beam is set, resulting in large deformation of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the temporary replacement support device for the foundation pit inclined support of the utility model;

[0020] Figure 2 This is a cross-sectional view of the pile-supported structure;

[0021] Figure 3 This is a cross-sectional view of the support removal and replacement process. DETAILED DESCRIPTION

[0022] In order to make the purpose and implementation of the present application clearer, the exemplary implementation of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all of the embodiments. It should be noted that the brief description of the terms in this application is only for the convenience of understanding the implementation described below, and is not intended to limit the implementation of the present application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0023] A temporary replacement support device for inclined supports of a basement foundation pit, such as Figure 1 As shown, it includes a supporting structure, a basement structure, a horizontal support assembly, a horizontal support replacement assembly 7 and an inclined support assembly.

[0024] After the foundation pit is excavated, a support structure is arranged in the foundation pit. Generally, the support structure includes various support piles 1 vertically arranged in the foundation pit.

[0025] The horizontal support assembly is fixed by the support structure. Specifically, the horizontal support assembly is constructed as horizontal support beams 6-1, 6-2 of different heights, the upper and lower layers are kept parallel, and the two ends of the horizontal support beams 6-1, 6-2 are fixed on the support piles 1, so that the horizontal support beams 6-1, 6-2 span the foundation pit.

[0026] In addition, it should be noted that, since the span of the foundation pit is usually large, the horizontal support assembly also provides support for it through the column 9-1 to ensure the horizontality of the horizontal support assembly. Specifically, on the ground, the support pile 1 and the column pile 9-2 are constructed at the same time, and the column 9-1 is fixed on the column pile 9-2. The column 9-1 vertically passes through each horizontal support beam 6-1, 6-2 and is anchored to support the horizontal support beams 6-1, 6-2. Exemplarily, the implementation form of the column 9-1 can be an angle steel lattice structure.

[0027] The basement structure includes a bottom plate 2, floor plates 4-1, 4-2 of each layer, external walls 3 and wall columns 5. The bottom plate 2 is constructed at the bottom of the foundation pit. The basement structures of each layer are constructed from bottom to top based on the bottom plate 2. Each basement structure includes floor plates 4-1, 4-2 of the corresponding level, external walls and internal wall columns 5. A horizontal support beam 6-1, 6-2 is correspondingly provided on the upper side of each floor plate 4-1, 4-2. It should be noted here that the horizontal support beams 6-1, 6-2 of each layer are completed first. When the horizontal support beams 6-1, 6-2 need to be removed, the corresponding level of the basement external walls 3 and floor plates 4-1, 4-2 are completed only on the lower side of the horizontal support beams 6-1, 6-2 of the layer to be removed. The wall columns 5 have not yet been constructed, and the horizontal support beams 6-1, 6-2 should avoid the basement wall columns 5.

[0028] The horizontal bracing assembly 7 is arranged in the outer space of the outer wall 3, and each horizontal position of the floor slabs 4-1 and 4-2 corresponds to a horizontal bracing assembly 7, connecting the outer wall 3 and the supporting structure. In some embodiments, the horizontal bracing assembly 7 is constructed as a bracing beam with a rectangular cross section, which is arranged at intervals along the pile body of the supporting pile 1.

[0029] The inclined support assembly is correspondingly arranged at the lower side of the horizontal support assembly 6-1, 6-2 to be removed, one end of which is connected to the supporting structure corresponding to the upper horizontal support beams 6-1, 6-2, such as the crown beam or waist beam of the supporting pile 1, and the other end is connected to the lower floor slab 4-1, 4-2.

[0030] In some embodiments, the angle between the inclined support assembly and the floor slab is preferably in the range of 30°-45°. At this angle setting, the supporting force generated by the stiffness of the inclined support assembly is more conducive to the stability of the supporting foundation pit.

[0031] In some embodiments, the diagonal support components are provided as needed, and are not necessarily provided on every basement structure.

[0032] In some embodiments, both ends of the diagonal support assembly are rigidly connected or hinged.

[0033] In some embodiments, the diagonal bracing assembly includes a diagonal bracing beam 8-1 and a corbel 8-2, and the diagonal bracing beam 8-1 is connected to the basement floors 4-1 and 4-2 through the corbel 8-2.

[0034] In some embodiments, the diagonal support assembly is cast concrete or steel structure.

[0035] Taking a foundation pit with two internal supports and a two-story basement structure as an example, the specific construction steps of the above-mentioned inclined support temporary replacement device for the basement foundation pit are:

[0036] (1) Construct support piles 1 according to the design drawings, excavate the foundation pit to the bottom, and construct horizontal support beams 6-1 and 6-2;

[0037] (2) Construct the basement floor 2, basement exterior wall 3, and negative second floor slab 4-2 in sequence. Figure 2 and set a conventional horizontal support beam 7 at the negative second floor slab 4-2, remove the negative second floor slab 4-2 and the corresponding second horizontal support beam 6-2 above it, as shown Figure 3 As shown;

[0038] (3) Continue to construct the basement exterior wall 3 and the negative first floor slab 4-1. Set a conventional horizontal replacement support beam 7 at the negative first floor slab 4-1. Construct the diagonal support replacement support beam 8-1, corbel 8-2 and other diagonal support components at the negative first floor basement. Remove the first horizontal support beam 6-1 corresponding to the upper side of the negative first floor slab 4-1. Figure 1 shown.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A temporary replacement device for inclined supports of a basement foundation pit, characterized in that: include: A supporting structure, wherein the supporting structure is arranged in the foundation pit; A horizontal support assembly, both ends of which are fixed on the supporting structure and span the foundation pit; The basement structure includes floors and exterior walls of each layer constructed sequentially in the foundation pit, and each floor and exterior wall has a corresponding horizontal support assembly on its upper side; A horizontal bracing assembly, which corresponds to each floor slab of the basement structure and connects the outer wall and the supporting structure; An inclined support component is correspondingly arranged on the lower side of the horizontal support component to be removed, one end of the inclined support component is connected to the supporting structure, and the other end is connected to the corresponding floor slab on the lower side of the horizontal support component to be removed.

2. The device for temporarily replacing inclined supports for basement foundation pits according to claim 1 is characterized in that: The angle between the inclined support assembly and the floor slab ranges from 30° to 45°.

3. The device for temporarily replacing inclined supports for basement foundation pits according to claim 1 or 2, characterized in that: The diagonal support assembly comprises a diagonal support exchange beam and a corbel, and the diagonal support exchange beam is connected to the floor slab via the corbel.

4. The device for temporarily replacing inclined supports for basement foundation pits according to claim 1 is characterized in that: The support structure includes support piles vertically arranged in the foundation pit.

5. The device for temporarily replacing inclined supports for basement foundation pits according to claim 1 is characterized in that: The middle part of the horizontal support assembly is supported by a column.

6. The device for temporary replacement of inclined supports for basement foundation pit according to claim 5, characterized in that: The columns are fixed by column piles at the bottom of the foundation pit.

7. The device for temporarily replacing inclined supports for basement foundation pits according to claim 1 is characterized in that: The inclined support assembly is cast in concrete or is a steel structure.

8. The device for temporarily replacing inclined supports for basement foundation pits according to claim 1 is characterized in that: The cross section of the horizontal support changing assembly is rectangular.

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