A construction method for vertical section type dismantling of inner support

Abstract

A vertical section-type dismantling inner support construction method includes designing the starting point for dismantling the upper inner support structure, constructing the lower main structure within the scope of the first new construction section, and erecting a dismantling frame when the concrete strength reaches 80%, Remove the upper inner support structure within the scope of the first new construction section upward, and construct the lower main structure within the scope of the second new construction section. When the concrete strength reaches 80%, erect and dismantle the frame body; dismantle the scope of the second new construction section The inner support structure of the upper layer is completed until the construction of all the lower layer structural plates and the lower layer replacement support structure in the foundation pit is completed, and the upper inner support structure is completely dismantled. The present invention is to dismantle the typical concrete corner brace support, the force characteristics are very clear, and the force of each support block is relatively independent, so as long as the dismantling of the support can satisfy the stability and safety of the force during dismantling, the section-type dismantling construction can be realized. , which can shorten the absolute construction period of support removal.

Description

technical field

[0001] The invention belongs to the field of deep foundation pit support, in particular to a construction method for dismantling an inner support in a vertical section type. Background technique

[0002] With the increasing shortage of urban land and the continuous development of high-rise and super high-rise buildings, deep foundation pits are more and more widely used in urban construction. However, the demolition of the inner support of the deep foundation pit has always been a major difficulty in the project, and it is a key process that restricts the progress of the project. The traditional demolition process of the inner support is generally to remove the upper side of the layer after the strength of the main structure of each layer reaches 80% after the construction is completed. The inner support, the main structure and the inner support all need to be constructed and demolished on the whole floor. When the area of ​​the main structure is large, it i...

Examples

Embodiment

[0086] The embodiment is as follows: a construction method for removing inner support in vertical section, the inner support of the foundation pit includes four corner inner supports, which are respectively designed at the four corners of the foundation pit. The inner support of the corners in the foundation pit includes a total of three layers of inner support structures according to a layered design, and the main structure includes a total of four layers in a vertical layered design in the foundation pit. The main structure includes the raft 21 and the upper side of the raft. The basement floor slab 22 and the replacement bracing structure of the same level as the basement floor slab.

[0087] like figure 1 As shown in the previous construction section, the main structure in the foundation pit is divided into nine construction areas, each area is constructed at the same time, and the construction is flowing, which facilitates the turnover of materials in the construction sta...

technical field

[0001] The invention belongs to the field of deep foundation pit support, in particular to a construction method for dismantling an inner support in a vertical section type. Background technique

[0002] With the increasing shortage of urban land and the continuous development of high-rise and super high-rise buildings, deep foundation pits are more and more widely used in urban construction. However, the demolition of the inner support of the deep foundation pit has always been a major difficulty in the project, and it is a key process that restricts the progress of the project. The traditional demolition process of the inner support is generally to remove the upper side of the layer after the strength of the main structure of each layer reaches 80% after the construction is completed. The inner support, the main structure and the inner support all need to be constructed and demolished on the whole floor. When the area of ​​the main structure is large, it i...

Examples

Embodiment

[0086] The embodiment is as follows: a construction method for removing inner support in vertical section, the inner support of the foundation pit includes four corner inner supports, which are respectively designed at the four corners of the foundation pit. The inner support of the corners in the foundation pit includes a total of three layers of inner support structures according to a layered design, and the main structure includes a total of four layers in a vertical layered design in the foundation pit. The main structure includes the raft 21 and the upper side of the raft. The basement floor slab 22 and the replacement bracing structure of the same level as the basement floor slab.

[0087] like figure 1 As shown in the previous construction section, the main structure in the foundation pit is divided into nine construction areas, each area is constructed at the same time, and the construction is flowing, which facilitates the turnover of materials in the construction sta...

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