Method for setting double-triple soil taking openings by reverse construction method

Abstract

The invention discloses a method for setting double-triple soil taking openings by a reverse construction method. Under the condition without influencing the first-layer vehicle running and the stability of a structure support system in the construction stage of the reverse construction method, the support and force transfer requirements of the reverse construction stage can be met by adopting a framework beam or the combination of the framework beam and a local triangular plate support form bottom to top in the region through the structure checking, on the premise, structures such as secondary beams, floor slabs and the like between two adjacent strides or three adjacent strides adopt post construction, and vacant regions of adjacent two-cabin or three-cabin floor slabs are set as soil taking openings. Through the arrangement of the double-triple soil taking openings, the contradiction between soil taking opening soil accumulation and the soil taking and the problem of vertical earthwork transporting passage are solved, the soil taking and the soil accumulation can be carried out in different hole positions, then, the position exchange regulation is carried out, the three-dimensional crossed construction is avoided, the soil outlet efficiency is improved, the soil digging time is shortened, the work period is saved, and the construction progress is ensured.

Description

technical field [0001] The invention belongs to the technical field of underground construction of buildings, and relates to a method for setting soil intakes of an upside-down method, in particular to a method for setting up a double-connected and triple-connected soil intake of the upside-down method. Background technique [0002] The upside-down method construction technology has been widely used in the current deep foundation pit construction due to its short construction period, small deformation, and low cost. It is especially suitable for urban areas with high building density, adjacent to buildings, subways, underground pipelines and surrounding areas. Foundation pit construction where the environment is sensitive to settlement deformation. However, due to its special construction technology, the upside-down method also has difficulties in earthwork excavation. In the construction of reverse method, the missing positions of the existing car ramps, stairwells, elevat...

AI Technical Summary

Problems solved by technology

However, due to its special construction technology, the reverse method also has difficulties in earthwork excavation.

In the construction of reverse method, the missing positions of the existing car ramps, stairwells, elevator rooms and other floor slabs and the predetermined single-column spacing are used as soil intakes for vertical transportation of earthwork. When digging soil, considering the safety of the three-dimensional intersection construction of the soil fetching grab and the soil pile excavator, there must be a certain avoidance time, and the transportation efficiency is very low, which reduces the excavation efficiency

In addition, due to the underground excavation method of reverse excavation, there are still defects such as difficulty in filling soil at the borrow mouth and low excavation efficiency, and the construction progress cannot be guaranteed.

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