Shaft excavation construction method and shaft structure for Gobi geological environment

Abstract

The invention discloses a shaft excavation construction method and a shaft structure aimed at the Gobi geological environment. The construction methods include: S1: On the current working face, drive multiple sand retaining piles into the quicksand sequentially along the circumference of the shaft shaft contour line, and fill concrete between adjacent sand retaining piles in the circumferential direction to form a layer For the ring-shaped advance support structure, enter S2; S2: Control the shaft boring machine to excavate the set depth inside the advance support structure using mud-water mode, and install the segment after excavation, and judge whether to excavate to the set depth after installing the segment If not, use the current excavation surface as the tunnel face and enter S1 for the next layer of construction. Before excavation, sand retaining piles are used for advance support to prevent the internal flow of quicksand outside the advance support structure. During the excavation process, mud-water mode is used for excavation, and mud wall protection during excavation can reduce the risk of well wall collapse and improve construction safety. , so that the shaft boring machine can carry out construction in the Gobi environment.

Description

technical field [0001] The invention relates to the technical field of excavation construction, in particular to a shaft excavation construction method and a shaft structure aimed at the Gobi geological environment. Background technique [0002] In recent years, with the promotion and implementation of the country's western development and the "Belt and Road" development strategy, engineering construction projects in the western region of my country are increasing. The engineering construction in the western region includes some underground space development projects, involving underground resource development, national defense engineering, and urban underground engineering. For this reason, the first thing to face is the problem of shaft construction. [0003] In recent years, with the maturity of shield machine and TBM technology, shaft boring machines have been used for shaft excavation. However, when excavating in the Gobi area, the stability of the cave wall is poor, a...

AI Technical Summary

Problems solved by technology

However, when excavating in the Gobi area, the stability of the cave wall is poor, and the disturbance during excavation can easily cause the cave wall to collapse and the ground to subside, causing cracking, sinking, and even structural damage to adjacent structures, so that the shaft roadheader brings great safety to the excavation construction. Risk, difficult to apply to construction in Gobi environment

Images