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Method for strengthening subgrade basement of existing high speed railway line

A technology for high-speed railways and existing lines, applied in roads, infrastructure engineering, soil protection, etc., can solve problems such as insufficient reinforcement strength, uneven reinforcement, settlement or collapse, etc., to improve soil strength and change physical and mechanical properties and the ability to bear loads, and the effect of reducing soil deformation

Inactive Publication Date: 2016-10-26
CHINA RAILWAY NO 3 GRP CO LTD +1
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Problems solved by technology

[0004] In order to solve the problems of insufficient reinforcement strength, uneven reinforcement, subsidence or collapse during the reinforcement process, etc. existing in the existing railway embankment reinforcement methods, the present invention discloses a reinforcement method for the existing roadbed base of high-speed railways, which maximizes the safety of the existing lines. The weak foundation is reinforced to improve the strength of the soil; and the invention is safe and reliable, and protects the safety of railway construction and operation

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  • Method for strengthening subgrade basement of existing high speed railway line
  • Method for strengthening subgrade basement of existing high speed railway line

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Embodiment Construction

[0037] The method for reinforcing the existing track base of the high-speed railway according to the present invention will be explained in detail below in conjunction with the accompanying drawings.

[0038] In general, this example presents the reinforcement construction of the existing roadbed of the high-speed railway when the shield tunneling of the subway section 00 of Beijing Metro Line 14 passes through the Beijing-Tianjin intercity railway. The sequence is as follows: Excavate a temporary vertical shaft 4, excavate and support the horizontal channel 3 with a length of 76.289m from the vertical shaft to the west along the outer side of the Beijing-Tianjin intercity high-speed railway line 1, and grout the test section from the south side wall in the horizontal channel 3. The reinforcement test The length of the section is 19.65m, the width is 16m, and the thickness is 8.9m. After the grouting in the test section is completed, the grouted soil is drilled and cored. After...

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Abstract

The invention discloses a method for strengthening a subgrade basement of an existing high speed railway line. The method comprises the steps of 1, performing construction operation of a temporary shaft on the side of a high railway speed line; 2, constructing vertical isolation piles between a cross passageway and the existing high speed railway line, performing construction operation of the cross passageway by starting from the interior of the temporary shaft in the direction of the high speed railway line, and the temporary shaft and the cross passageway forming a construction passageway; 3, performing operation of a ramming pipe curtain by starting from the interior of the cross passageway in the direction of the subgrade basement; 4, performing operation of grouting a sleeve valve tube; and 5, backfilling the temporary shaft and the cross passageway. According to the invention, the soft foundation of the existing line is strengthened to the maximum, the physical and mechanical properties and the load bearing capacity of the subgrade ca be improved, the soil strength is improved, the soil deformation is decreased, and the purpose of strengthening soil is realized. Furthermore, the method is safe and reliable in construction, the phenomena of subsidence and collapse during construction are completely avoided, and the railway construction and operation safety are protected.

Description

technical field [0001] The invention relates to the technical field of high-speed railway embankment reinforcement, and more specifically relates to a method for reinforcing the base of an existing high-speed railway roadbed. Background technique [0002] Due to the vigorous development of domestic subway and high-speed rail construction, subway tunnels passing under the existing line foundation of high-speed rail will become more frequent. However, since the high-speed rail operation has strict requirements on line deformation and settlement, it is particularly important to reinforce the high-speed railway foundation during the construction of the existing subgrade of the high-speed railway under the subway section. [0003] Therefore, a method for realizing thorough reinforcement of railway embankment and avoiding the soil collapse problem in the construction process on the existing line of high-speed railway has become a technical problem to be solved urgently and the foc...

Claims

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Application Information

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IPC IPC(8): E01B2/00E02D3/12
CPCE01B2/006E02D3/12
Inventor 冯靖宇徐常福马锋郑保才徐公文韩磊李鹏冯凯樊庆鹏苏俊生
Owner CHINA RAILWAY NO 3 GRP CO LTD
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