Supporting method for super-large deep foundation pit construction in soft soil area

Abstract

The invention discloses a supporting method for super-large deep foundation pit construction in a soft soil area. The supporting method is characterized in that the supporting method mainly includes anovel buckle steel pipe and Larsen steel plate combined system and is suitable for supporting measures of super-large super-scale deep foundation pit foundation construction of the soft soil area. Conventional super-large super-scale foundation pit excavation supporting measures in the soft soil area are combined, the measures utilize buckle steel pipe piles and Larsen steel plate piles, the problem that during construction of deep foundation pits in the soft soil area and near the edges of important buildings, the cost of the conventional construction technological measures is high is mainlysolved, the cost of the construction measures of the supporting method is low, the period is short, and pollution to the surrounding environment is avoided.

Description

technical field [0001] The invention relates to a support method for foundation pit construction, in particular to a support method for super large deep foundation pit construction in soft soil areas. Background technique [0002] The support forms of super-large and super-scale deep foundation pits in soft soil areas often include SMW construction methods, underground diaphragm walls, deep-layer cement-soil mixing of enclosure walls, high-pressure jet grouting piles, bored piles and other support forms. The material is concrete, and the support form is affected by the age of the concrete. The construction period is long. At the same time, the material cannot be recycled, which has an impact on the surrounding environmental protection. The cost of construction measures is high. However, the conventional Larsen steel sheet pile supports this type of foundation pit, and the depth of the foundation pit is long. There is no such specification in the market, and the Larsen steel ...

AI Technical Summary

Problems solved by technology

[0002] The support forms of super-large and super-scale deep foundation pits in soft soil areas often include SMW construction methods, underground diaphragm walls, deep-layer cement-soil mixing of enclosure walls, high-pressure jet grouting piles, bored piles and other support forms. The material is concrete, and the support form is affected by the age of the concrete. The construction period is long. At the same time, the material cannot be recycled, which has an impact on the surrounding environmental protection. The cost of construction measures is high. However, the conventional Larsen steel sheet pile supports this type of foundation pit, and the depth of the foundation pit is long. There is no such specification in the market, and the Larsen steel sheet pile needs to be customized. At the same time, the internal support system has many layers, resulting in many construction joints. Facing the foundation in the soft soil area with abundant groundwater, when the structure has horizontal force and seismic requirements, it should be reduced. The number of construction joints or it is not suitable to set construction joints

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