Method for calculating underground continuous wall with supporting legs under action of horizontal loads

Abstract

The invention relates to a method for calculating a continuous wall with supporting legs under the action of horizontal loads. According to the specific constructing mode of the underground continuous wall with the supporting legs, firstly, a finite element program of a common elastic foundation beam method is modified and improved, a finite element program of a variable stiffness elastic foundation beam method is made, an engineering calculation method of internal force and horizontal displacement under the action of the horizontal loads is formed in combination of a depth judgment method on the interface of the supporting legs, and therefore when the continuous wall is used as a basement exterior wall and a foundation pit support structure, the lateral pressure of a soil body can be borne. The method can make engineer design personnel fast and effectively design and calculate the underground continuous wall with the supporting legs.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering and foundation pit engineering in the specialty of civil engineering, and relates to a calculation method for a diaphragm wall with outriggers under the action of a horizontal load. Background technique [0002] With the expansion of the city, the number of high-rise buildings is increasing, and the depth of the basement is deepening; with the economic development, in order to protect the urban environment and quality, major cities in the world, including domestic large and medium-sized cities, have explored the development of roads underground. The construction of underground space is in full swing, and the technology of deep and thick underground diaphragm walls has been widely used in the construction process. The underground diaphragm wall project is expensive and difficult to construct, and there are still the following problems in practical application: [0003] 1. It is on...

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Problems solved by technology

[0003] 1. It is only used as the permanent outer protective wall of the basement, and the vertical load is not considered

[0004] 2. The insertion depth in the soft soil foundation is large, and the construction difficulty and project cost increase

[0005] 3. When the excavation depth of the foundation pit is large and the bedrock surface is buried shallowly, the underground diaphragm wall must enter the bedrock to a certain depth

The ordinary vertical elastic foundation beam finite element program used when the underground diaphragm wall bears the horizontal load has the same stiffness matrix of each element, which cannot reflect the lateral stiffness difference between the wall section and the outrigger section of the underground diaphragm wall with outriggers

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