Foundation pit support and basement side wall support system and construction method

Abstract

The invention discloses a foundation pit support and basement side wall support system and a construction method. The support system comprises at least one basement side wall and a foundation pit support, the at least one row of foundation pit supports are located on the outer side of at least one basement side wall and spaced from the basement side walls; the at least one connecting beam group is arranged between each row of foundation pit supports and the corresponding basement side wall in a one-to-one correspondence mode, each connecting beam group comprises a plurality of connecting beams, one end of each connecting beam is fixed to the corresponding row of foundation pit supports, and the other end of each connecting beam is fixed to the outer side face of the corresponding basement side wall. The connecting beams are arranged between the supporting system of the foundation pit and the side wall of the basement, so that the supporting system and the side wall of the basement form a whole, the structure of the supporting system of the foundation pit is utilized to reinforce the side wall of the basement, and the influence of soil pressure on the side wall of the basement is reduced.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and in particular to a foundation pit support and basement side wall support system and a construction method. Background Art

[0002] In soft soil areas, retaining piles are typically used as foundation pit support structures. Furthermore, the basement sidewalls in the sunken courtyard are typically cantilevered. Conventional construction methods require the foundation pit support structure and basement sidewalls to be independent of each other. In practice, if the basement sidewalls are insufficiently strong during the foundation pit backfill process, soil pressure can easily cause them to deform. Summary of the Invention

[0003] The present invention provides a support system for foundation pit support and basement side walls. Connecting beams are arranged between the support system of the foundation pit and the basement side walls so that the support system and the basement side walls form a whole. The structure of the foundation pit support system itself is utilized to strengthen the basement side walls, thereby reducing the influence of soil pressure on the basement side walls.

[0004] A further improvement of the present invention is that it includes: at least one basement side wall; at least one row of foundation pit supports respectively located on the outside of at least one of the basement side walls and spaced apart from the basement side walls; at least one connecting beam group correspondingly arranged between each row of foundation pit supports and the corresponding basement side walls, each of the connecting beam groups including a plurality of connecting beams, one end of each connecting beam being fixed to the corresponding row of foundation pit supports, and the other end being fixed to the outer side surface of the corresponding basement side wall.

[0005] A further improvement of the present invention is that each row of the foundation pit support is composed of a plurality of support piles arranged side by side, the number of the support piles in each row of the foundation pit support is not less than the number of the connecting beams in the corresponding connecting beam group, and one end of each connecting beam fixed to the foundation pit support is fixed to the outer wall of one of the support piles.

[0006] A further improvement of the present invention is that the multiple coupling beams in each coupling beam group are parallel to each other and evenly spaced and fixed between corresponding rows of foundation pit supports and basement side walls.

[0007] The construction method of the foundation pit support and basement side wall support system of the present invention comprises the following steps:

[0008] S1. Construct at least one row of the foundation pit support in the foundation pit construction area, excavate to the bottom of the foundation pit, and construct at least one corresponding basement side wall at intervals inside at least one row of the foundation pit support;

[0009] S2. Construct at least one connecting beam group between each row of the foundation pit supports and the corresponding basement side wall; the connecting beam group includes a plurality of connecting beams, and one end of each connecting beam is fixed to the corresponding row of foundation pit supports, and the other end is fixed to the outer side surface of the corresponding basement side wall.

[0010] S3. Backfill the foundation pit.

[0011] A further improvement of the present invention is that, when constructing the foundation pit support, steel bars corresponding to the connecting beam are reserved on the foundation pit support, and after the construction of the corresponding basement side wall is completed, the steel bars are connected to the outer side of the corresponding basement side wall; when constructing the connecting beam, formwork is supported outside the steel bars and poured to form the connecting beam.

[0012] A further improvement of the present invention is that before executing step S1, the force system of the support system is first established and calculated to determine the number and position of the connecting beams. When performing the calculation, the support strength of the foundation pit support and the stiffness of the basement side wall need to be taken into account.

[0013] A further improvement of the present invention is that, before executing step S3 and during the construction of the pipelines in the foundation pit, each pipeline is positioned below a connecting beam. By providing connecting beams between the foundation pit support system and the basement side walls, the present invention forms a single integrated unit with the support system. This utilizes the structure of the foundation pit support system to strengthen the basement side walls and reduce the impact of soil pressure on the basement side walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the top structure of the invention.

[0015] 1. Foundation pit support; 2. Support piles; 3. Basement side walls; 4. Connecting beams. DETAILED DESCRIPTION

[0016] The present invention provides a foundation pit support and basement side wall support system, such as Figure 1 Shown, including:

[0017] At least one basement side wall 3; at least one row of foundation pit supports 1 respectively located on the outside of at least one basement side wall 3 and spaced apart from the basement side wall 3; at least one connecting beam group correspondingly arranged between each row of foundation pit supports 1 and the corresponding basement side wall 3, each connecting beam group including a plurality of connecting beams 4, one end of each connecting beam 4 being fixed to the corresponding row of foundation pit supports 1, and the other end being fixed to the outer side surface of the corresponding basement side wall 3.

[0018] like Figure 1As shown, in this embodiment, each row of foundation pit support 1 is composed of multiple support piles 2 arranged side by side, and the number of support piles 2 in each row of foundation pit support 1 is not less than the number of connecting beams 4 in the corresponding connecting beam group, and one end of each connecting beam 4 fixed to the foundation pit support 1 is fixed to the outer wall of one of the support piles 2.

[0019] like Figure 1 As shown, in this embodiment, the multiple connecting beams 4 in each connecting beam group are parallel to each other and evenly spaced and fixed between the corresponding row of foundation pit supports 1 and the basement side walls 3.

[0020] like Figure 1 As shown, in this embodiment, the foundation pit support 1 is composed of a plurality of support piles 2 arranged in an arrangement, the foundation pit support 1 and the basement side wall 3 are parallel to each other, and a connecting beam 4 is fixed to every other support pile 2 to ensure that the spacing distance between each two connecting beams 4 is equal. By making the plurality of connecting beams 4 evenly spaced between the basement side wall 3 and the foundation pit support 1, it is ensured that the entire basement side wall 3 can be evenly supported.

[0021] The present embodiment provides a construction method for a foundation pit support and a basement side wall support system, comprising the following steps:

[0022] S1. Construct at least one row of foundation pit supports 1 in the foundation pit construction area, excavate to the bottom of the foundation pit, and construct at least one corresponding basement side wall 3 at intervals inside at least one row of foundation pit supports 1;

[0023] S2. Construct at least one connecting beam group between each row of foundation pit support 1 and its corresponding basement side wall 3; the connecting beam group includes multiple connecting beams 4, and one end of each connecting beam 4 is fixed to the corresponding row of foundation pit support 1, and the other end is fixed to the outer side surface of the corresponding basement side wall 3.

[0024] S3. Backfill the foundation pit.

[0025] In this embodiment, when constructing the foundation pit support 1, the corresponding steel bars of the connecting beam 4 are reserved on the foundation pit support 1, and after the construction of the corresponding basement side wall 3 is completed, the steel bars are connected to the outer side of the basement side wall 3; when constructing the connecting beam 4, formwork is supported and cast outside the steel bars to form the connecting beam 4. Reserving the steel bars of the connecting beam 4 in advance when constructing the foundation pit support 1 can make the connection between the connecting beam 4 and the foundation pit support more stable, and at the same time can speed up the progress of subsequent construction.

[0026] In this embodiment, before executing step S1, the force system of the support system is first established and calculated to determine the number and position of the connecting beams 4. When performing the calculation, the support strength of the foundation pit support 1 and the stiffness of the basement side wall 3 need to be taken into account.

[0027] In this embodiment, before performing step S3 and when installing pipelines in the construction foundation pit, each pipeline is located below a tie beam 4. By burying the pipelines in the foundation pit below the tie beam 4, the influence of soil settlement above on the pipelines can be reduced.

[0028] Preferably, in this embodiment, the position of the entrance and exit is located below the tie beam 4 to reduce the influence of soil settlement on the entrance and exit.

[0029] Preferably, in this embodiment, before construction, the construction cost of this solution can be calculated first. Although the solution of the present invention requires construction up to the tie beam 4 and additional steel bars will be used, in the prior art, a large amount of steel bars are required when constructing the cantilever basement side wall 3 to ensure its strength. Since the tie beam 4 and the foundation pit support 1 form an integral whole in this application, increasing the strength of the basement side wall 3, the amount of steel bars required when constructing the basement side wall 3 can be reduced. The specific calculation process includes the following steps:

[0030] The first step: Design and calculate the amount of steel reinforcement required for the basement side wall in the traditional solution, and calculate its cost Z1;

[0031] The second step: Calculate the amount of steel reinforcement required for the tie beam 4 and the basement side wall reinforcement in the solution of the present invention, and calculate its cost Z2;

[0032] The third step: Compare Z1 and Z2. If Z2 < Z1, then adopting this solution can ensure the strength of the basement side wall 3 while having a lower cost.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A foundation pit support and basement side wall support system, characterized in that: include: At least one basement side wall; at least one row of foundation pit supports respectively located on the outside of at least one basement side wall and spaced apart from the basement side wall; at least one connecting beam group correspondingly arranged between each row of foundation pit supports and the corresponding basement side wall, each connecting beam group comprising a plurality of connecting beams, one end of each connecting beam being fixed to the corresponding row of foundation pit supports, and the other end being fixed to the outer side surface of the corresponding basement side wall.

2. The foundation pit support and basement side wall support system according to claim 1, characterized in that: Each row of the foundation pit support is composed of multiple support piles arranged side by side. The number of the support piles in each row of the foundation pit support is not less than the number of the connecting beams in the corresponding connecting beam group. One end of each connecting beam fixed to the foundation pit support is fixed to the outer wall of one of the support piles.

3. The foundation pit support and basement side wall support system according to claim 1, characterized in that: The multiple coupling beams in each coupling beam group are parallel to each other and evenly spaced and fixed between the corresponding rows of foundation pit supports and the basement side walls.

4. A construction method for a foundation pit support and basement side wall support system according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Construct at least one row of the foundation pit support in the foundation pit construction area, excavate to the bottom of the foundation pit, and construct at least one corresponding basement side wall at intervals inside at least one row of the foundation pit support; S2. Construct at least one connecting beam group between each row of the foundation pit supports and the corresponding basement side wall; the connecting beam group includes a plurality of connecting beams, and one end of each connecting beam is fixed to the corresponding row of foundation pit supports, and the other end is fixed to the outer side surface of the corresponding basement side wall. S3. Backfill the foundation pit.

5. The construction method of the foundation pit support and basement side wall support system according to claim 4, characterized in that: When constructing the foundation pit support, the corresponding steel bars of the connecting beam are reserved on the foundation pit support, and after the construction of the corresponding basement side wall is completed, the steel bars are connected to the outer side of the corresponding basement side wall; when constructing the connecting beam, formwork is supported outside the steel bars and poured to form the connecting beam.

6. The construction method of the foundation pit support and basement side wall support system according to claim 4, characterized in that: Before executing step S1, the force system of the support system is first established and calculated to determine the number and position of the connecting beams. When performing the calculation, the support strength of the foundation pit support and the stiffness of the basement side wall need to be taken into account.

7. The construction method of the foundation pit support and basement side wall support system according to claim 4, characterized in that: Before executing step S3 and when constructing the pipelines in the foundation pit, each of the pipelines is located below one of the connecting beams.

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