Subdivided unequal-strength grouting reinforcement method adapted to tunnel construction close to building

Abstract

The invention relates to a zonal unequal-strength grouting reinforcement method suitable for the construction of a tunnel adjacent to a building. The method determines the range of the grouting reinforcement area according to the positional relationship between the tunnel and the building; and divides the grouting reinforcement area; Before the tunnel is excavated to the position close to the building, drill holes in the ground between the tunnel and the building and arrange multiple settlement monitoring points at the bottom of the building foundation; carry out unequal-strength grouting in the grouting reinforcement area and strengthen it in different areas ; After the grouting is completed, the excavation construction of the tunnel passing through the building is carried out, and the settlement monitoring point at the bottom of the building foundation is monitored in real time, and it is determined whether to carry out reinforcement grouting in the grouting reinforcement area according to the monitoring results; After the tunnel excavation is completed and the secondary lining is applied, the final effect of the sub-area grouting reinforcement of the tunnel adjacent to the construction of the building is judged by extracting the settlement data of the settlement monitoring points. The invention ensures uniform settlement and coordinated deformation of buildings during tunnel construction, and reduces reinforcement costs.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a unequal-strength grouting reinforcement method suitable for the construction of tunnels adjacent to buildings. Background technique [0002] In tunnel construction, the situation of passing through buildings sometimes happens. While digging the tunnel, it is necessary to strictly control the maximum settlement of the building caused by the excavation of the tunnel. As an effective measure to strengthen the ground, reduce ground settlement, and protect the safety of existing buildings on the ground, the grouting reinforcement control technology has been widely used in the engineering of tunnels passing through existing buildings. However, the current grouting pre-reinforcement technology is mainly considered from the control of the overall settlement of the building. Using a single-strength grout to strengthen the ground does not fully consider the differential settlement of ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems and deficiencies existing in the existing single-strength grout reinforcement of the stratum, the present invention provides a unequal-strength grouting reinforcement method suitable for the construction of tunnels adjacent to buildings. Improve the deficiencies of the existing grouting pre-reinforcement technology to achieve the goal of controlling the differential settlement of buildings and ensuring the coordinated deformation of structures

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