A Method for Determining Dynamic Monitoring Index of Slope Deformation During Construction Period
A technology of dynamic monitoring and monitoring indicators, applied in the direction of measuring devices, instruments, etc., can solve the problems of incompleteness, difficulty in monitoring indicators of slope deformation, failure to strive for reinforcement time, etc., and achieve the effect of reducing errors
Inactive Publication Date: 2017-08-25
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]
[0026] Where D is the measured displacement value corresponding to x, t, α, β, m 1 、m 2 is the regression coefficient, t is the total time from the completion of the installation of the instrument to the current monitoring, in days, and x is t...
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The invention discloses a method for determining the dynamic monitoring index of slope deformation during the construction period, which includes: firstly establishing a displacement growth database during the excavation period of the slope during the safety stage, including detailed records of instrument installation, installation time, and the working surface of each excavation cycle The vertical distance from the displacement monitoring equipment, and carry out normal monitoring and recording work. According to the formula provided by the method of the present invention according to the obtained data, the safe range of slope displacement growth can be directly obtained. When the measured displacement deviates greatly from this index in the later period, early warning measures need to be taken. This method breaks through the previous limitation of relying solely on the displacement growth rate and engineering analogy to judge the personnel's engineering experience, and realizes the establishment of a model for determining monitoring indicators based on monitoring data, slope excavation conditions, and slope operation time.
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