Tunnel early-stage support clearance-intrusion processing method and construction ancillary equipment of tunnel early-stage support clearance-intrusion processing method

Abstract

The invention discloses a tunnel early-stage support clearance-intrusion processing method and construction ancillary equipment of the tunnel early-stage support clearance-intrusion processing method. The method comprises the following steps of: performing optimized design on a design inner contour line of a tunnel (the design inner contour line of the arch part of the tunnel is lowered to be used as an optimum inner contour line of the arch part on the premise of keeping the tunnel design elevation unchanged; the optimized inner contour line of the arch part is positioned between a tunnel building boundary line and the design inner contour line of the arch part; the side wall circular arc line of the optimized inner contour line of the arch part is in consequent connection with the side wall circular arc line of the design inner contour line of the tunnel; the optimized inner contour line of the tunnel is obtained; and an optimization design drawing is determined); (2) reinforcing a clearance-intrusion section of the tunnel; (3) performing construction according to the optimization design drawing (lining is constructed on the clearance-intrusion section of the tunnel according to the optimized inner contour line; a secondary lining arch part of a non-clearance-intrusion section adjacent to the clearance-intrusion section in the longitudinal direction is in consequent connection transition with the constructed lining arch part of the clearance-intrusion section). The method and the equipment have the advantages that simplicity is realized; implementation is easy; the cost is low; the work efficiency is high; and the normal construction of the tunnel is facilitated.

Description

technical field [0001] The invention relates to a treatment method for initial support invasion of tunnels, and also relates to construction supporting equipment for realizing the treatment method. Background technique [0002] In recent years, with the rapid development of my country's infrastructure construction, tunnels have developed in the direction of large cross-sections and large buried depths. Therefore, the tunnel passes through weak and broken surrounding rock (that is, within a certain range around the tunnel, which has an impact on the stability of the tunnel body) Rock or soil) conditions, complex geological environment and high ground stress are inevitable. However, due to the complexity of the tunnel engineering geological environment, the limited accuracy and detail of geological exploration, and the differences in the construction technology level of construction units, various engineering problems are bound to be encountered during the construction process....

AI Technical Summary

Problems solved by technology

[0004] (1) Arch replacement: The arch replacement operation generally includes construction steps such as grouting consolidation, manual removal, and replacement of supports. During manual removal operations, the fallen objects may directly hit the human body. Therefore, there is a great safety hazard in the arch replacement operation. risk

Since adjusting the longitudinal slope is to lower the overall elevation of the tunnel, the section affected by this treatment method is too long, which has a great impact on the section that has been under normal construction, and it is time-consuming and laborious to deal with, which is not conducive to the normal construction of the tunnel.

Images