Method for determining dynamic deformation monitoring index of slope during construction period
A technology of dynamic monitoring and monitoring indicators, applied to measuring devices, instruments, etc., can solve the problems of incompleteness, large difference in unique growth rate, difficulty in monitoring indicators of slope deformation, etc., and achieve the effect of reducing errors
Inactive Publication Date: 2015-12-16
WUHAN UNIV OF TECH +1
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Problems solved by technology
[0002] There are technical difficulties in the determination of slope deformation monitoring indicators, which rely more on analogy judgments based on engineering experience. Usually, safety monitoring personnel make preliminary judgments based on the rate of displacement growth, but since the conditions of each slope are not exactly the same , the only growth rate varies greatly, and there is no unified standard. Second, the sudden change criterion of the displacement growth rate can only be used for slip prediction, which means that it is impossible to obtain enough reinforcement time and take preventive measures
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[0022] A method for determining a dynamic monitoring index for slope deformation during construction, specifically comprising the following steps:
[0023] Step 1: Install monitoring equipment on site, record the detailed time of installation, and record in detail the vertical distance between the excavation cycle face of the slope and the equipment installation location.
[0024] Step 2: When enough data is collected and lasts for a long enough time, for example, when the excavation of the slope is completed within one-third to one-half of the elevation range, the collected displacement monitoring data is brought into the calculation formula (1), and the regression calculation Get the coefficients α, β, m 1 、m 2 value;
[0025] D = α ( 1 - e - 0.0005 t ) ...
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The invention discloses a method for determining the dynamic deformation monitoring index of a slope during the construction period. The method comprises the steps of firstly, establishing a displacement increment database during the slope safety stage of the excavation period and conducting the normal monitoring and recording operation. The displacement increment database comprises the installation detailed record of instruments, the installation time of instruments, and the vertical distance between each excavation cyclic operation surface and a displacement monitoring device. According to acquired data, the displacement increment safety range of a slope based on the above method provided by the invention is directly obtained. When the actually measured displacement is greatly deviated from the safety range during the late construction period, precautionary measures are taken. According to the method, the conventional judgment means, which is only based on the displacement rate of rise and the engineering analogy, is highly dependent on the engineering experiences of judging people can be overcome. Meanwhile, a model for determining monitoring indexes is established based on monitoring data, the slope excavation condition and the slope application duration.
Description
technical field [0001] The invention belongs to the field of geotechnical engineering safety monitoring, in particular to a method for determining the dynamic monitoring index of slope deformation during construction. Background technique [0002] There are technical difficulties in the determination of slope deformation monitoring indicators, which rely more on analogy judgments based on engineering experience. Usually, safety monitoring personnel make preliminary judgments based on the rate of displacement growth, but since the conditions of each slope are not exactly the same , the only growth rate varies greatly, and there is no unified standard. Second, the sudden change criterion of the displacement growth rate can only be used for slip prediction, which means that sufficient reinforcement time cannot be obtained and preventive measures can be taken. Contents of the invention [0003] Aiming at the problems existing in the background technology, the present invention...
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IPC IPC(8): G01B21/32
Inventor 郭运华李新平樊伟罗忆林丹吕鹏飞
Owner WUHAN UNIV OF TECH