Method and device for pile sinking type excavation of foundation pit

Abstract

The invention belongs to the technical field of civil engineering construction, and in particular relates to a method and device for excavating foundation pits by sinking piles, the purpose of which is to provide an earthwork honeycomb array excavation method for foundation pits, which reduces earthwork barging and on-site earthwork piles The field occupies. In this method, the excavation array of the foundation pit is firstly divided into regions to form several partitioned soil layers, and type I soil-borrowing tool pipes are driven into the boundary to form boundaries; Excavation, after the excavation of the first layer of soil is completed, excavate the soil of the second layer of soil, and repeat until the remaining soil area is left; finally, insert the type II soil extraction tool tube, and move the soil extraction tools in sequence Pipe, complete the excavation of foundation pit earthwork. The device is a soil-borrowing tool tube, including a hollow tube body and a one-way check mechanism at the bottom. The one-way check mechanism includes two soil retaining plates spliced ​​and connected, and the sides of the two soil retaining plates that are close to each other are respectively hinged with the positioning rod Connection, also includes three limit bar.

Description

technical field [0001] The invention belongs to the technical field of civil engineering construction, and in particular relates to a pile-sinking type excavation method and device for foundation pits. Background technique [0002] With the continuous development of building foundation pits to super large areas and super deep depths, soil borrowing after excavation of deep foundation pits is very important, which directly affects the progress and economic cost of deep foundation pit projects. At present, earthwork excavation equipment for deep foundation pits includes long-arm excavators, shell-bucket telescopic-arm excavators, grab excavators, etc. All these equipments have the problems of large operation area and multiple transfers of earthwork, resulting in low construction efficiency. At the same time, construction in the existing central urban area has the problem of limited earthwork transportation capacity. Generally, temporary earthwork storage yards are used to solv...

AI Technical Summary

Problems solved by technology

At present, earthwork equipment for deep foundation pits includes long-arm excavators, shell-bucket telescopic-arm excavators, grab excavators, etc., all of which have the problems of large operation area and multiple transfers of earthwork, resulting in low construction efficiency

At the same time, construction in the existing central urban area has the problem of limited earthwork transportation capacity. Generally, temporary earthwork storage yards are used to solve the problems of earthwork transportation, storage and on-site construction progress coordination.

Moreover, a large amount of earthwork piles pose a great safety hazard to the foundation pit and the surrounding environment.

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