Urban tunnel construction monitoring method including half-covered excavation and sequential construction method and monitoring system

Abstract

The invention provides an urban tunnel construction monitoring method including a half-covered excavation and sequential construction method and a monitoring system, and belongs to the field of engineering monitoring. The method comprises a tunnel construction method including the half-covered excavation and sequential construction method, a manual monitoring method and an automatic monitoring method. The half-covered excavation and sequential construction method comprises steps of constructing one half of a road during the deep foundation pit construction; after excavating the road for a certain depth, enclosing the top; carrying out the rest engineering under an enclosed top cover; carrying out open-air excavation and construction o the other half of opened part; and after the road is excavated to a standard height, constructing a main body structure and carrying out water-proof operation from the bottom to the top from the lowest layer structure until carrying out backfilling and restoring tube circuits to the basic surface. The manual monitoring method comprises steps of presetting a test piece and a test point in a fixed position; and using an instrument to carry out manual measurement to acquire related data. The automatic monitoring method comprises the step of achieving construction monitoring on deformation and force bearing of a tunnel support system through the data automatic acquisition technology, the network wireless communication technology and the database application technology so that a data guidance dynamic construction scheme can be dynamically fed back and monitored at any time.

Description

technical field [0001] The invention belongs to the technical field of engineering monitoring, in particular to a system and method for real-time monitoring during the excavation and construction of urban highway tunnels. Background technique [0002] With the rapid development of traffic engineering and the development and utilization of urban underground space, the construction process of subways and urban highway tunnels has been accelerated. Due to the complex geological environment of urban underground tunnels, the complexity of underground pipelines, and the lack of information on some underground lines, urban underground tunnel projects It is difficult to complete the design and construction smoothly at one time, and it has to undergo continuous program revision, which increases the cost and investment of design and construction. Urban tunnel construction methods mainly include open-cut method, cover-excavation method, underground excavation method, shield method and ...

AI Technical Summary

Problems solved by technology

The construction process is long. During the period, in order to ensure the safety of the tunnel construction process in the urban area, monitoring instruments must be used to monitor various control indicators such as the tunnel support structure. Among them, deformation monitoring is the key to the monitoring work. The construction monitoring method is mainly Including traditional manual monitoring and automatic monitoring. The traditional manual monitoring method is greatly disturbed by environmental factors. At the same time, there are also problems such as asynchronous measurement points, unmeasurable large deformation, poor real-time performance, and long data collection and analysis cycles. Hidden defects of the project cannot be found in time, but the monitoring cost is relatively low; automatic monitoring realizes the construction monitoring of the deformation and stress of the tunnel support system through automatic data collection technology, network wireless communication technology and database application technology. All-weather, real-time monitoring is implemented, and the data is timely, accurate and reliable, but the cost is high

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