Reliability-based quantitative evaluation method for service state of existing pile-like retaining structures
A technology of retaining structure and service state, applied in the field of quantitative evaluation, can solve the problems of unreliable index monitoring and evaluation, and achieve reliable evaluation results
Active Publication Date: 2022-07-01
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology
[0003] When the reliability-based method is used for quantitative evaluation, since the existing pile retaining structure has been constructed and served, the existing pile retaining structure reliability evaluation method cannot monitor and analyze the development process of its reliability index over time. Evaluate
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Embodiment 1
[0098] like figure 1 As shown in the figure, a reliability-based quantitative evaluation method for the service state of an existing pile-like retaining structure includes the following steps:
[0099] S1: Establish a functional function of the service state of the existing pile-like retaining structure to be evaluated (flexural resistance, shear resistance, compressive resistance of rock and soil in front of the pile, etc.).
[0100] To implement the above technical solution, in the step S1, the functional function Z(t) of the service state of the existing pile-type retaining structure is:
[0101] Z(t)=g[R(t),S(t)]=R(t)-S(t)
[0102] In the formula, R(t) - the random process of the resistance of the pile-like retaining structure, which changes with time with the time-varying effect of the material properties after the structure has been in service for a long time; S(t) - the random process of the load effect of the pile-like retaining structure, It changes with the natural e...
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The invention discloses a reliability-based quantitative evaluation method for the service state of an existing pile type supporting structure, comprising the following steps: S1: establishing a function function of the service state of the existing pile type supporting structure to be evaluated; S2: according to The long-term and real-time monitoring data of the existing pile-type retaining structure can be obtained by statistical analysis to obtain the statistical characteristics of the action of the pile body; considering the time-varying weakening factors of the material related to the carbonization of the pile body and the corrosion of the steel bar, the time-varying factors of the existing pile-type retaining structure are established. Calculate the expression of the variable resistance, and calculate the statistical characteristics of the time-varying resistance; S3: According to the statistical characteristics of the pile body action and the statistical characteristics of the time-varying resistance, calculate the failure probability and reliability index of the function function; S4 : According to the failure probability and reliability index of the function function, the quantitative evaluation result of the service state of the existing pile-type retaining structure is obtained, and the remaining service life of the existing pile-type retaining structure is predicted.
Description
technical field [0001] The invention relates to a quantitative evaluation method, in particular to a reliability-based quantitative evaluation method for the service state of an existing pile type supporting structure. Background technique [0002] my country's mountainous area accounts for about 2 / 3 of the land area. my country has successively built Baocheng Railway, Nanning-Kunming Railway, Nei-Kunming Railway and other major mountain trunk lines that have attracted worldwide attention. These mountain railways are important infrastructure and popular means of transportation in China. , plays an extremely important role in the process of economic and social development. At present, these mountain railways involve a large number of pile-type support structures and have been in service for decades. How to carry out risk assessment of the service status of these existing pile-type support structures has become a concern of railway operation departments. [0003] When the reli...
Claims
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IPC IPC(8): G06F30/13G06F119/04
Inventor 郭海强徐骏高柏松杨泉谢清泉李安洪李刚王占盛李炼杨淑梅姚裕春
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD