On-line monitoring method used for long distance linear infrastructure settlement tests

Abstract

The invention relates to an on-line monitoring method used for long distance linear infrastructure settlement tests, which is characterized in that several measuring points are distributed on a long distance linear infrastructure to be measured along linear direction according to requirement, a settlement test sensor is arranged at each measuring point, each settlement test sensor can be connected through a communicating pipe, the settlement sensor comprises a pressure membrane and a fiber grating sensor, a communication liquid in the communicating pipe is in a sealing state, according to a principle of the communicating pipe, liquid pressure intensity at each measuring point of the stationary communicating pipe is same, water pressure at different position can be deformed through the pressure membrane by the test system, corresponding displacement change can be measured by the fiber grating sensor, and finally settlement test at each measuring point can be realized. According to the method, settlement test at each measuring point can be realized by a pressure intensity transmission principle, and problems of limit measuring range and difficult balance of water surface due to pressure balance realized by flowing of the free water body in a static force level can be overcome.

Description

[technical field] [0001] The invention belongs to the technical field of on-line settlement monitoring of linear infrastructure in civil engineering structures, in particular to an on-line monitoring method for settlement testing of long-distance linear infrastructure. [Background technique] [0002] The so-called linear infrastructure generally refers to buildings (structures) with a very large aspect ratio that carry the basic functions of urban and rural areas. From a technical point of view, it can also be extended to water, gas and oil pipelines, long and large public buildings, etc. Due to its unique structural shape, its structural stiffness and overall stability are extremely sensitive to its settlement index. The development law of the settlement trend, including the sudden change of the difference between adjacent points, means the change of the stiffness of the linear infrastructure, usually accompanied by structural diseases. production and development. Existin...

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Problems solved by technology

[0003] The static level can be monitored online, but its test length is limited (usually more than 200m, the system is difficult to achieve balance), the settlement measurement range is very small (usually about 10cm, and the settlement of the tunnel often exceeds this limit), and the static level The cost of the force level is very high (about 10,000 yuan / measuring point)

The optical level can realize long-distance high-precision measurement, but it can only realize long-distance settlement measurement through manual transfer stations, and cannot realize online monitoring, and the workload is large and the labor cost is high

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