Design method of serious ground subsidence area in high-speed railway tunnel crossing area
A technology of land subsidence and design method, applied in design optimization/simulation, geometric CAD, special data processing applications, etc. Deformation and other problems, to avoid tunnel diseases and intrusion problems
Active Publication Date: 2021-03-16
CHINA RAILWAY DESIGN GRP CO LTD
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Problems solved by technology
In recent years, the operating mileage of domestic railways and subways has increased sharply. With the increase of operating years, regional differential settlements have induced tunnel structural deformation, resulting in frequent occurrence of tunnel invasion, cracking, damage, water leakage and other diseases, which not only greatly increase operation and maintenance costs, but also The line has affected the comfort of the train, and may endanger the safety of train operation in severe cases
[0003] At present, there have been some studies on regional settlement at home and abroad, but most of them focus on ground lines or elevated lines. There are few research results on underground lines, and the adaptation of tunnel engineering to regional differential settlement within the design service life (100 years) Sexuality and coping methods have not been systematically studied
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[0043] Below, the present invention is described in detail with reference to accompanying drawing and embodiment:
[0044] Such as Figure 1~8 As shown, a design method for the serious ground subsidence area in the high-speed rail tunnel crossing area includes the following steps:
[0045] (i) Obtain the contour map of the settlement rate along the tunnel and the profile map of the settlement rate over the years
[0046] Collect InSAR data for a certain period of time along the tunnel, use PS-InSAR method to extract deformation information, use ArcGIS filter to process abnormal points, and perform vector splicing to obtain contour maps and longitudinal profiles of settlement rates along the tunnel over the years. Such as figure 1 , figure 2 shown.
[0047] (ii) Obtain the corrected multi-year average sedimentation rate V
[0048] On the basis of step (i), the monitoring data of regional benchmarking points are used for correction, and the land subsidence caused by surrou...
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The invention discloses a design method for a serious land subsidence region in a high-speed rail tunnel passing region. The method comprises the steps of acquiring subsidence rate contour maps and subsidence rate profile diagrams along a tunnel over the years, acquiring a corrected multi-year average subsidence rate V, determining an N-year total subsidence quantity correction system gamma<N>, obtaining a stratigraphic regional subsidence ratio xi<h> under depth h, obtaining N-year tunnel predicted regional subsidence values through calculation, acquiring tunnel rail surface maximum adjustment height delta(H<N>) and determining tunnel section clearance size. The method for tunnel project regional land subsidence and tunnel subsidence prediction, line profile fitting and tunnel section design under differential subsidence conditions is proposed systematically for the first time, the problem that a serious subsidence segment and even a subsidence funnel region are formed in a long-distance linear underground project passing region is effectively solved, tunnel defect and clearance intrusion problems caused by regional differential subsidence are avoided, and hundred-year design of anewly built tunnel project is truly realized.
Description
technical field [0001] The invention belongs to the field of high-speed rail tunnel design, and in particular relates to a design method for a serious ground subsidence area in a high-speed rail tunnel crossing area. Background technique [0002] High-speed railways, railways, urban tunnels, and subways are linear projects, and the strata in different areas within the crossing range are quite different, and the regional settlement characteristics are different. Most of the tunnel projects are natural foundations, and the structure is attached to the stratum. Without interference from other external factors, its settlement over the years is similar to the regional settlement trend. In recent years, the operating mileage of domestic railways and subways has increased sharply. With the increase of operating years, regional differential settlements have induced tunnel structural deformation, resulting in frequent occurrence of tunnel invasion, cracking, damage, water leakage and...
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IPC IPC(8): G06F30/13G06F30/20
CPCG06F30/13G06F30/20
Inventor 张继清林森斌李得昌王乐明高翔田小芳冯天炜信磊磊
Owner CHINA RAILWAY DESIGN GRP CO LTD