Excavation method of reverse construction method-constructed foundation pit

Abstract

The invention provides an excavation method of a reverse construction method-constructed foundation pit. The mechanical excavation and the hydraulic excavation are combined for construction in the reverse construction method-constructed foundation pit; when the mechanical excavation is convenient, the mechanical excavation is performed; when the mechanical excavation is limited, the hydraulic excavation is performed; a high-pressure water gun scours soil to form mud; the mud flows to a corresponding mud pool; the mud is conveyed to a mud treatment area through a mud discharge pipe; and meanwhile, a basement floor is cast to realize synchronous ground and underground construction. The excavation method effectively improves the soil excavation efficiency, is not limited by the traffic control, shortens the construction period, reduces the cost, saves the energy, and protects the environment.

Description

technical field [0001] The invention belongs to the technical field of earthwork construction of foundation pits, and in particular relates to an excavation method for foundation pits constructed by the reverse method. Background technique [0002] With the continuous development and utilization of urban underground space, the scale of foundation pits is getting larger and larger. The reverse construction method has outstanding advantages in economic, social and environmental benefits: 1) It can make the construction of the upper structure of the building and the underground foundation structure The parallel and three-dimensional construction works can save about 1 / 3 of the working hours when the building scale is large and there are many upper and lower levels; 2) The top and bottom plates form a retaining structure, with small deformation and displacement and reasonable force, so the impact on adjacent buildings is small; 3) Construction can be less affected by wind and ra...

AI Technical Summary

Problems solved by technology

However, in the upside-down construction method, there is often a problem of difficulty in earthwork excavation due to the deep foundation pit; at the same time, the excavation space is small, which is not conducive to large-scale mechanized construction. The construction of equipment is slow, or a temporary project needs to be built to assist transportation, which has a great impact on the construction of the project. At the same time, urban traffic control will also limit the time of earthwork transportation

The above defects will lead to extended construction period and economic losses; at the same time, earthwork transportation will cause problems such as large urban dust and poor construction site environment.

Images