Monitoring method for influence on adjacent existing structures from tunnel excavation

Abstract

The invention discloses a monitoring method for an influence on adjacent existing structures from tunnel excavation, comprising the following steps: (1), making a monitoring plan according to a geologic report, adjacent existing structure conditions and a construction plan for a tunnel; (2), organizing construction works by the construction party according to the construction progress; (3), performing field monitoring according to the monitoring plan; (4), organizing the monitored data and performing a simulation analysis on the monitored data, and judging whether the data is in the range of the pre-warning value; (5), pre-warning the construction party; (6), assessing the rationality and scientificity of the construction technology, and adjusting the construction plan. The invention establishes a monitoring method with a set of perfect system, and sets monitoring index values, and selects and arranges monitoring points, and monitors vertical deformations of the baseboards of the adjacent existing structures, stress changes of surrounding rocks in disturbed areas, shock vibrations of tunnel blasting, cracks of existing structures and walls, leveling for the baseboard and so on, and establishes communication between the construction and monitored information to form a positive cycling for quality controls on engineering constructions.

Description

technical field [0001] The invention relates to a monitoring method, in particular to a monitoring method used for monitoring the influence of adjacent existing structures during tunnel excavation, so as to ensure the safe use of adjacent existing structures, and belongs to the technical field of civil engineering construction monitoring. Background technique [0002] With the development of my country's national economy, the demand for infrastructure, especially for transportation facilities, is increasing, and land transportation such as railways and highways is the first to bear the brunt; at the same time, high-level traffic arteries have also achieved unprecedented development, such as: High-speed, heavy-duty railways and expressways are the main directions for the development of land transportation such as railways and highways respectively, and the construction of urban subways and highway tunnels is an important means to ease urban traffic. The improvement and capacit...

AI Technical Summary

Problems solved by technology

[0004] The monitoring methods for adjacent existing structures mentioned in existing literature and commonly used generally have the following characteristics: ①The monitoring object is mainly the construction tunnel itself, and the monitoring of existing adjacent structures is separated from the monitoring of the construction tunnel Openly, the correlation and unity of the two are not considered; ②The monitoring method is single, monitoring the deformation (internal force) of a single structure, the pressure of surrounding rock (deformation) or the blasting shock wave. Reflecting a certain aspect of the safety and reliability of existing structures, it is difficult to reflect the safety and reliability of existing structures in an all-round way; ③The monitoring process is out of order, and a systematic and complete monitoring process has not been formed, which makes construction and monitoring disconnected. When there are potential safety hazards in the existing structure during the construction process, it cannot be analyzed, warned and resolved in a timely manner, and the role of monitoring cannot be fully exerted

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