Ring-shaped inner supporting structure used in deep peat soil deep foundation pit

Abstract

The invention relates to a ring-shaped inner supporting structure used in a deep peat soil deep foundation pit. The ring-shaped inner supporting structure comprises a supporting system, a waterproof curtain, a slope unloading system and a support replacement system and is characterized in that the supporting system is divided into a support pile, a top beam, a ring beam, an angle brace and a communication beam, the top of the support pile is provided with the reinforced concrete top beam; the top beam forms an external structure of the foundation pot; the ring-shaped inner supporting structure is formed in a way of combining the ring beam, the angle brace and the communication in the middle; and the overall plan for the support of the foundation pit engineering is formed by using the combined support and the pit wall waterproof curtain together with the means of large-area soil-discharge de-loading and the like. With the adoption of the ring-shaped inner supporting structure, the problems of small anchor tensile force, easily-happened creep deformation, large deformation as well as invasion and harassment to the adjacent property of an anchor rope in the common design in peat soil are solved generally, and the disadvantages that common inner supporting types such as lattices, trusses and beams seriously affect the earthworks digging and transporting as well as the construction of an underground structure are overcome; and furthermore, the engineering cost is reduced furthest, and the earthworks digging and transporting as well as foundation construction periods are shortened.

Description

technical field [0001] The invention relates to an annular inner support structure applied in deep foundation pits of deep peat soil. Background technique [0002] With the continuous development and utilization of urban underground space and the construction of a large number of high-rise buildings, the scale and depth of deep foundation pit engineering are also increasing. The problem of deep foundation pit engineering has become a hot and difficult point in the field of engineering construction. The foundation soil around the Dianchi Lake in some areas is deep peat soil formed by lacustrine facies and lacustrine facies, which is saturated, porous, soft plastic to flow plastic, soft, rich in a large amount of organic matter and humus, and is commonly known as " Grass coal" layer is a typical extremely soft soil layer. [0003] At present, most shallow foundation pits in some areas are supported by shotcrete anchors or pile anchors. Since the site around Dianchi Lake is m...

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Problems solved by technology

[0004] In view of the above-mentioned problems, the object of the present invention is to provide a method that is applied in deep peat soil stratum to solve the problem that traditional support methods are difficult to control foundation pit deformation, easily cause slope instability and violate adjacent property rights, etc. Difficult circular inner brace support structure

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