Earth-excavating device and earth-excavating method for earth pressure balance shield or pipe-jacking construction

Abstract

The invention provides an earth-excavating device and earth-excavating method for earth pressure balance shield or pipe-jacking construction. The earth-excavating device comprises a mud pressing pumpconnected to a shield or a screw conveyor earth discharge mouth of a jacking pipe; a booster pump located in the shield or a last-section frame of the jacking pipe and connected with the mud pressingpump through a first pumping pipeline; a wellhead pump located at a tunnel wellhead and connected with the booster pump through a telescopic pipeline; a ground earth collecting pit connected with thewellhead pump through a second pumping pipeline. The earth-excavating device is specially used for tunnel construction by means of a shield or jacking pipe method. By means of the mud pressing pump arranged at the screw conveyor earth discharge mouth, the booster pump arranged in the shield or the last-section frame of the jacking pipe, and the wellhead pump arranged in the tunnel wellhead, the screw conveyor excavated earth generated from the shield or the jacking pipe during the excavation process is continuously and rapidly pumped until the earth is pumped into the ground earth collecting pit, the booster pump is connected with the screw conveyor earth discharge mouth in a sealed mode, and the screw conveyor excavated earth is extruded into pumps in a sealed mode and then into pumping lines, so that the pumping efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an excavation device and an excavation method for earth pressure balance shield or pipe jacking construction. Background technique [0002] The use of earth pressure balance shield or pipe jacking for the construction of urban rail transit subway tunnels is relatively mature, but the excavation and transportation procedures in the excavation process of conventional earth pressure balance shield or pipe jacking are complicated and time-consuming. The excavation process of earth pressure balance shield tunneling or pipe jacking excavation is as follows: [0003] 1. The excavated soil excavated in the excavation surface of shield tunneling machine or pipe jacking machine is conveyed by screw conveyor to the belt conveyor in the shield tunneling machine or pipe jacking machine; [0004] 2. The belt conveyor transports the soil through each section of the frame of the shi...

AI Technical Summary

Problems solved by technology

[0010] 1. The process is complicated. After the excavation muck of shield tunneling / pipe jacking comes out through the screw machine, it needs to be transported by belt conveyor, transported by earth box electric locomotive, vertically lifted at the tunnel wellhead, and ground translationally lifted;

[0011] 2. Long time-consuming: Due to the complex process, the muck transportation in each link takes a lot of time, and the muck transportation process conflicts with other construction processes, which easily interferes with other construction processes;

[0012] 3. Large potential safety hazard: During the hoisting and transportation of muck at the wellhead and the ground, due to the large volume and heavy weight of the soil box, there is a great potential safety hazard during the hoisting process;

[0013] 4. Loud noise: When the soil box is poured into the soil collection pit on the ground, the instantaneous impact of the muck is large, and the noise of the dumping of the muck is loud. Construction in urban core areas and densely populated areas is very likely to disturb the people.

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