Micro-motion detection method of urban complex site condition environment

Abstract

The invention discloses a micro-motion detection method of urban complex site condition environment. The method comprises the steps of: collecting micro-motion signal data of the urban complex site condition environment by geophone points on the ground; extracting surface wave dispersion information from the collected data; calculating horizontal / vertical curves of the geophone points; generatinggeological area data according to the horizontal / vertical curves; and carrying out construction in the urban complex site condition environment according to the geological area data. The method has the following advantages that the surrounding environment vibration is taken as a seismic source and an artificial seismic source is not needed, so that the method is strong in anti-interference ability, does not influence the surrounding environment and is free from electromagnetic interference; the method is adapted to the urban complex environment and can be applied to the detection of various geological bodies and relatively small target bodies; and the problems of inconvenience and damage caused by a vertical drilling sampling method adopting a geological drilling rig in the urban complex site condition environment are avoided, underground tunnels or underground optical fiber, cables, water supply pipelines and the like can be effectively protected during the construction and the urbanenvironment is avoided being affected by generated heavy mud.

Description

technical field [0001] The invention relates to the field of urban construction, in particular to a micro-movement detection method for urban complex site conditions and environments. Background technique [0002] The geotechnical engineering survey of urban municipal engineering generally adopts the core drilling sampling method, mainly using geological drilling rigs to conduct vertical drilling and coring on site for comparison and verification, and the laboratory conducts physical and chemical performance tests of the soil to determine its performance parameters. However, the following problems need to be solved urgently in the vertical drilling and coring in the central area of ​​the city. [0003] (1) During the implementation of the vertical drilling sampling method of geological drilling rigs, it is necessary to block and occupy roads to interrupt traffic, which has a great impact on traffic flow. Many urban central areas are busy with traffic, and do not have the con...

AI Technical Summary

Problems solved by technology

[0003] (1) During the implementation of the vertical drilling sampling method of geological drilling rigs, it is necessary to block and occupy roads to interrupt traffic, which has a great impact on traffic flow. Many central areas of cities are busy with traffic, and do not have the conditions for drilling and coring construction in enclosed roads.

For example, a certain project is located under the main traffic road in the urban center of Haizhu District, and the traffic cannot be interrupted.

In addition, the tunnel passes through subway lines, overpasses and other structures, and the protection area of ​​the subway line is 50m in front and back. In addition to the subway line itself, drilling and coring cannot be carried out within a range of about 150m.

In this way, the site investigation conditions are extremely limited, and conventional engineering drilling cannot be carried out, resulting in the lack of geological data in this section

[0004] (2) In the central area of ​​the city, underground pipelines are dense and underground structures are widely distributed. Drilling and coring requires detailed investigation of underground pipelines and structures, and it is easy to damage underground pipelines and structures during drilling.

[0005] (3) The process of drilling and coring produces a large amount of mud, which is easy to pollute the environment and has a great impact on the environment in the central area of ​​the city

[0006] Therefore, the drilling core sampling method has many restrictive factors, and it is inconvenient to apply.

Images