Reinforcing method for improving bend and shear bearing capacity of independent foundation

An independent foundation and bearing capacity technology, applied in the repair of foundation structure, foundation structure engineering, construction, etc., can solve the problems of large amount of concrete, reduce the overall work performance of post-cast concrete, increase the self-weight of the foundation, etc., to reduce the cost of reinforcement, The effect of reducing the amount of concrete and reducing the amount of excavation work

Inactive Publication Date: 2012-07-04
郭猛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the connection beam is separated from the foundation but the distance between the bottom surface of the connection beam and the top surface of the foundation is relatively close, there are many difficulties in strengthening the independent foundation with the above reinforcement method
For example, when the reinforcement method of pouring concrete on the upper part of the original foundation is adopted, the post-cast concrete is divided into several parts at the position of the connecting beam, which greatly reduces the overall work performance of the post-cast concrete, and the post-cast concrete is completely paved on the original foundation. A large amount is used, which increases the self-weight of the foundation

Method used

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  • Reinforcing method for improving bend and shear bearing capacity of independent foundation
  • Reinforcing method for improving bend and shear bearing capacity of independent foundation
  • Reinforcing method for improving bend and shear bearing capacity of independent foundation

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Reference figure 1 , figure 2 with image 3 The original independent foundation is a stepped independent foundation with two steps. The main steps of using the method of the present invention to strengthen the independent foundation are as follows:

[0033] Step 1. Calculate the design value of the axial force and the design value of the bending moment of the independent foundation according to the building reconstruction data and structural drawings. According to the current foundation design code, calculate the required foundation height for punching and the required bending of the slab bottom. For the height of the foundation, take the larger of the two heights as the required height of the independent foundation; compare the calculation results with the original foundation and the cross-sectional size and reinforcement amount of the connecting beam to determine the concrete cross-sectional size and the amount of concrete required for reinforcement.

[0034] Step 2. Excav...

Embodiment 2

[0041] Reference Figure 4 with Figure 5 , Shows the elevation schematic and top view of the second embodiment of the stepped independent foundation using a reinforcement method for improving the bending and shear bearing capacity of the independent foundation of the present invention. The difference between the second embodiment and the first embodiment is that the reinforcement range of the second embodiment includes the first step and the second step of the original independent foundation. In addition to the implanted column 1, the horizontal shear reinforcement 5 is also implanted into the independent foundation. 3 on the side of the first step. The implementation steps of the reinforcement method are similar to those of the above-mentioned embodiment. Of course, for a stepped independent foundation with multiple steps, the reinforced area described in the present invention can extend to the second step, the third step, etc., and so on, and the present invention does not l...

Embodiment 3

[0043] Reference Image 6 , Shows a schematic elevation view of the reinforcement method of the present invention applied to a cone-shaped independent foundation. The difference between this embodiment and the above-mentioned first and second embodiments is that the independent foundation described in this embodiment is a cone-shaped independent foundation. Basically, the implementation steps of the reinforcement method are similar to the steps of the foregoing embodiment, and the present invention will not be discussed in detail here.

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Abstract

The invention discloses a reinforcing method for improving a bend and shear bearing capacity of an independent foundation, belonging to the technical field of structural reinforcement. The reinforcing method comprises the main steps of: scabbling the surface of concrete of a connection beam and the independent foundation; forming holes on the upper surface of the independent foundation and planting reversed-U-shaped reinforcing steel bars which enclose the connection beam; forming holes on the surface of a column, planting horizontal shear reinforcing steel bars and binding the reinforcing steel bars; coating an interface agent on the scabbled concrete surface, supporting a mould and casting the concrete so as to finish the reinforcement of the independent foundation. The reinforcing method provided by the invention utilizes less reinforced concrete to integrally connect the previous independent foundation with the connection beam to form a new independent foundation, so that the punching shear capacity of the independent foundation is improved and the distance from a plate bottom reinforcing steel bar to the center of a resultant force point of the concrete is enlarged; and furthermore, the bend bearing capacity of the independent foundation is improved. The reinforcing method provided by the invention has the advantages of simplicity in construction and material saving, and can be widely applied to the reinforcement and reconstruction of the independent foundation with the connection beam under the column.

Description

Technical field [0001] The invention relates to the technical field of building structure reinforcement, in particular to a reinforcement method for improving the bending and shear bearing capacity of an independent foundation. [0002] Background technique [0003] The independent foundation under the column includes a stepped foundation and a conical foundation, which is a flexible extended foundation. When the bending and shear bearing capacity of the independent foundation under the column is insufficient, the reinforcement method of increasing the height of the foundation to transform the foundation into a rigid foundation is usually adopted. The document "Design and Construction of the Reinforcement of Concrete Foundation Under the Column of a Steel Structure Factory Building" is used to reinforce the independent foundation under the column by directly pouring concrete under the column, on the upper part of the foundation, and adding a steel frame on the upper part for reinf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D37/00
Inventor 郭猛袁泉孙静常鹏李鹏飞
Owner 郭猛
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