Construction method of layer-built grouting of existing structures adjacent to tunnel by advanced same-hole multiple ducts

Abstract

The invention discloses a construction method of layer-built grouting of existing structures adjacent to a tunnel by advanced same-hole multiple ducts. The method comprises the following steps that 1,the grouting range and hole location arrangement are designed; 2, an inclined shaft support is removed; 3, tunnel integral construction is carried out; and 4, drill holes and small ducts are installed and grouted. The construction method directly transports slurry to the designated position with advanced small pipes similar to the distribution shape of branches, the role of skeleton is achieved at the same time, rapid and efficient grouting is achieved, small pressure is used for avoiding the impact of large pressure on a pipeline and ensure that the ground settlement or uplift is in the absolute safety range.

Description

technical field [0001] The invention belongs to the technical field of advanced curtain grouting construction for tunnels, and relates to an advanced layered grouting construction method for tunnels adjacent to existing structures with the same hole and multiple conduits. Specifically, it relates to a tunnel adjacent to existing structures based on advanced curtain grouting technology An advanced layered grouting construction method with multiple conduits in the same hole. Background technique [0002] At present, with the rapid development of society and the acceleration of urbanization, the construction of domestic transportation network is in the stage of vigorous development, especially in some big cities including provincial capitals. Construction is in full swing, with the vast majority using underground excavation. In this way, it is inevitable to pass through unfavorable geological zones such as weak and water-rich strata. The usual solution is to use advanced curta...

AI Technical Summary

Problems solved by technology

[0003] Based on the current status of advanced curtain grouting construction technology in my country, it is not difficult to find that the oil grouting technology and equipment are poorly equipped, the grouting process is relatively backward, the grouting hole drilling is slow, the face (grouting wall) is time-consuming, and grouting in sections Problems such as low efficiency seriously restrict the effect of grouting and become a major bottleneck affecting the construction of urban subways

In addition, the existing grouting technology is mainly based on splitting and extrusion grouting caused by the pressure of the grouting machine, supplemented by penetration. In cities with intricate underground pipelines, it is easy to cause uplifts and uplifts of pipelines and road surfaces.

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