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Settlement control method in process of enabling subway tunnel to penetrate through existing railway

It is a technology for settlement control and existing railways, which is applied in the fields of earthwork drilling, special data processing applications, mining devices, etc., and can solve problems such as deformation of existing railway foundations and track structures, adverse effects of subway tunnel construction safety, disturbances, etc., to achieve It is convenient to guide the construction, and the settlement control index is clear and intuitive.

Inactive Publication Date: 2015-11-25
中国铁道科学研究院集团有限公司城市轨道交通中心
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Problems solved by technology

Underpass construction of the subway tunnel will inevitably disturb the foundation of the existing railway, and will cause different degrees of ground settlement, which will cause deformation of the existing railway foundation and track structure, which will not only adversely affect the safety of the subway tunnel construction, but also affect the The operation safety of existing railways will cause serious damage to existing railways, causing large safety accidents and causing large economic losses

Method used

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  • Settlement control method in process of enabling subway tunnel to penetrate through existing railway
  • Settlement control method in process of enabling subway tunnel to penetrate through existing railway
  • Settlement control method in process of enabling subway tunnel to penetrate through existing railway

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Embodiment Construction

[0016] Described method is described in detail below in conjunction with example and accompanying drawing:

[0017] In this example, a three-dimensional calculation model of line structure-subgrade-soil layer is established, such as figure 1 As shown, the selection of model calculation size mainly considers boundary effects, calculation efficiency and calculation speed. For the values ​​of tunnel section and concrete strength, refer to "Code for Design of Railway Subgrade" and "Code for Design of Subway", etc. The soil constitutive model is selected from the elastic-plastic model that conforms to the M-C criterion.

[0018] Collect and sort out the engineering data of subway tunnels passing through railways in some cities in China. The collected data mainly include geological conditions, construction methods, section forms and sizes, buried depths, settlement control standards during construction, and settlement measured values. The collected geological conditions for underpa...

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Abstract

The invention provides a settlement control method in a process of enabling a subway tunnel to penetrate through the existing railway. The settlement control method comprises the steps: establishing a line structure-subgrade-soil layer three-dimensional calculation model by utilizing a dynamic finite element theory to simulate and analyze deformation relations of a tunnel structure, a soil layer and a track foundation caused by subway tunnel construction at different tunnel burial depths in different excavation manners; by combining the existing subway tunnel under-through construction documents, summarizing and concluding deformation influence factors and a deformation influence rule to the existing line foundation, and an influence rule to track irregularity caused by tunnel excavation during subway tunnel under-through construction; based on correlation requirements on track static geometric dimensions and dynamic quality allowable deviation management in the existing railway deformation control index system, proposing a settlement control index in the process of enabling the subway tunnel to penetrate through the existing railway; if during construction, the real-time monitored subgrade settlement amount is over the settlement control index, giving out an alarm. The invention can relieve, eliminate and avoid adverse effects to the ground surface settlement of the crossed existing railway caused by subway construction, and provides a means to scientifically and reasonably developing safety evaluation of the subway tunnel construction.

Description

technical field [0001] The invention belongs to a method for controlling ground subsidence and deformation, in particular to a method for controlling subsidence of a subway tunnel passing through an existing railway. Background technique [0002] Transportation is closely related to social progress and development, and convenient transportation conditions are one of the basic factors for the formation and development of cities. Especially in the past ten years, the rapid economic development has made the city continue to expand, and road traffic is facing more and more serious congestion. Urban rail transit with large capacity and isolation from ground traffic has attracted widespread attention in large cities in China and has entered a period of rapid development. . By the end of 2012, 20 cities in my country have opened urban rail transit operation, and the total mileage of operation has reached 2400km. By around 2015, there will be 158 urban rail transit lines built or u...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18G06F17/50G06F19/00
Inventor 刘艳青张伟马伟斌郭小雄朱宏伟
Owner 中国铁道科学研究院集团有限公司城市轨道交通中心
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