Single point extensometer and method for measuring deformation of advanced core soil of tunnel excavation
A single-point displacement and tunnel excavation technology, which is applied in the directions of measuring devices, earthwork drilling, surveying and navigation, etc., can solve the problems of human operation errors and mistakes, non-continuous monitoring, decision-making misjudgment, etc., and achieve the overall structure Simple and compact, accurate measurement results and high degree of automation
Inactive Publication Date: 2018-10-16
SHANGHAI INST OF TECH
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[0004] However, the traditional single-point displacement gauge is a fixed-reading frequency type, and the data can only be copied by the on-site technicians. Since this monitoring method is all human-operated, there are many errors and mistakes in the human-operated operation, so there are certain differences in the monitoring data. inaccuracy of
In addition, artificial monitoring is not continuous monitoring. Generally, technicians record once in a while, which cannot form a continuous and effective monitoring effect. If there is a large deformation and the monitoring is not continuous, it will not be able to form early preventive measures. engineering accident
The traditional single-point displacement meter layout is generally determined by the guidance of technical experts with construction experience. It is difficult to arrange the best position purely by experience. If no measuring point is arranged at the position with large axial deformation, only relying on experience will cause misjudgment in decision-making. , affecting the quality of tunnel excavation and the quality of tunnel support
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[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0033] figure 1 It is a schematic diagram of the structure of the single-point displacement meter provided by the present invention, such as figure 1 As shown, it includes: a sensor 1, a data reading disc 2, a flange 3, a single-point settlement gauge body 4, an elongated measuring rod 5, and an anchoring head 6. The sensor 1 and the data reading disc 2 pass through the The flange 3 is fastened to one end of the single-point settlement gauge body 4, the other end of the single-point ...
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The invention provides a single point extensometer and a method for measuring deformation advanced core soil of tunnel excavation., The single point extensometer comprises: a sensor, a data reading disk, a flange, a single point sedimentation meter body, an elongated measuring rod, an anchoring head, and the sensor and the data reading disk are fastened to one end of the single point sedimentationmeter body by the flange, and the other end of the single point sedimentation meter body is connected to one end of the elongated measuring rod, the anchoring head is located on the other end of theelongated measuring rod. The single-point extensometer has a simple and compact overall structure, and can directly obtain the measurement data of the single-point extensometer through the data reading disk, and wirelessly transmit the data to the information collecting instrument through the sensor, thereby directly obtaining the data value and reducing the error of human reading which ensures the reliability of data.
Description
Technical field [0001] The invention relates to the technical field of tunnel excavation monitoring, in particular to a single-point displacement meter and a method for measuring the deformation of the core soil in advance of tunnel excavation. Background technique [0002] With the vigorous development of my country's subways and expressways, tunnel excavation technology has been increasingly used. Due to the different stratum, topography and hydrogeological conditions of various places, the way of tunnel excavation and the support method during tunnel excavation will also be different. Among them, the most important factors affecting the quality of tunnel excavation are the deformation rate of the tunnel during excavation and the support effect during tunnel excavation. If the deformation monitoring and advance support are not paid attention to when the tunnel is excavated, it will cause engineering accidents, such as collapse and roof fall. [0003] During tunnel excavation, w...
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IPC IPC(8): G01B21/32G01C7/06E21F17/18
Inventor 李相如仇圣华马家昕
Owner SHANGHAI INST OF TECH