Construction method of foundation pit earthwork

Abstract

The invention relates to a construction method of foundation pit earthwork. When a construction site is small, steel lattice column support posts under intermediate trestle area support beams are intensive, the foundation pit has deep excavation, a vehicle ramp does not have enough horizontal length, an earthmoving vehicle can not go down to the pit bottom, and earthwork excavation construction is substantially difficult, excavation is carried out by heaping a soil island in the process of excavating a third layer and a fourth layer of the earthwork, a subgrade plate is inserted in both sides of center supports to retain earth, the soil island is heaped, the earthwork is excavated by way of the soil island by a long arm digging machine docked on a trestle. The method of the invention has the advantages of greatly improved excavation efficiency, shortened construction period, and obvious actual effect. The method is a preferred construction method of carrying out earthwork construction in an intensive support area of deep foundation pit steel lattice column.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to an earthwork construction method for a foundation pit in which an earth platform island is arranged on a support side. Background technique [0002] With the continuous development of building heights, the number of underground building floors continues to increase, and the excavation depth of foundation pits is getting larger and larger. At the same time, the urban construction land is tight, the construction site is small, the surrounding buildings are surrounded by buildings, and the supporting beams in the trestle area are under steel The support columns of the lattice column are dense, and the earth excavation construction is difficult. In construction practice, how to ensure the economy, safety and construction period requirements of foundation pit construction, and have strong operability, is the key technical point of foundation pit construction, and it al...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects existing in the prior art, the present invention provides a construction method of foundation pit earthwork, which overcomes the construction technical problems of large excavation depth of foundation pit, dense lattice columns in the middle support area, and difficult earthwork construction. It is safe and reliable, shortens the construction period, and saves materials, etc. It is an optimal construction method for earthwork construction under dense support of deep foundation pits.

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