Soft foundation reinforcing method of existing railway or highway subgrade construction

A technology for weak foundations and existing railways. It is applied in the direction of infrastructure engineering, soil protection, sheet pile walls, etc. It can solve the problems of large operating space for construction equipment, reduce post-construction settlement and safety and stability coefficients, and avoid traffic interference. Effect

Active Publication Date: 2010-11-17
广东省铁路规划设计研究院有限公司
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Problems solved by technology

However, for urban areas or when there is no transitional condition for construction lines, and the normal operation of vehicles cannot be interrupted during the construction process, conventional foundation treatment measures are difficult to meet the re

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  • Soft foundation reinforcing method of existing railway or highway subgrade construction
  • Soft foundation reinforcing method of existing railway or highway subgrade construction
  • Soft foundation reinforcing method of existing railway or highway subgrade construction

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0028] A method for reinforcing weak foundations of existing railway and road subgrade engineering, which comprises the following steps:

[0029] 1) Set observation piles on the shoulder of the subgrade to be reinforced, and set up a row of observation piles at 2m and 10m outside the slope foot, and the longitudinal spacing of observation piles is 10m.

[0030] 2) Construct vertical jet grouting piles 5 on the side slope 1 and slope toe 2 of the subgrade to be reinforced. A row of vertical jet grouting piles 5, this construction method can reduce the deformation influence of the construction of vertical jet grouting piles 5 on the road base body. The vertical jet grouting piles 5 on the slope 1 are constructed by jumping piles, and the vertical jet grouting piles 5 are constructed at intervals of 3 to 5 piles along the longitudinal direction, s...

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Abstract

The invention relates to a soft foundation reinforcing method of the existing railway or highway subgrade construction, which comprises the following steps of: constructing vertical chemical churning piles on the side slope and the slope toe of a subgrade to be reinforced; after the vertical chemical churning piles are cured, drilling a plug hole tilting toward the center line of a track and extending into the soft foundation in the side slope by using a drilling machine; and performing shock tube grouting in the plug hole. A sizing agent in the plug hole permeates towards the periphery of the foundation, the cured sizing agent, the vertical chemical churning piles and the foundation form an integrated reinforcing block, and thus, the reinforcement of the railway or highway subgrade construction is completed. Compared with the traditional single technique, the method has the advantages of no construction transition, no traveling interruption and no reinforcing dead zone by adopting the vertical chemical churning piles together with a shock tube grouting technique. The advantages of both the vertical chemical churning piles and the shock tube grouting technique are fully exerted, and the safety and the quality are controllable.

Description

technical field [0001] The invention relates to the technical field of railway construction, in particular to a method for reinforcing weak foundations of existing railway and road subgrade projects. technical background [0002] At present, when the existing railway and road subgrade projects are upgraded on weak foundations, or when the existing subgrades have problems such as excessive settlement and instability, construction convenience lines are generally used for temporary transition to ensure normal transportation, and then the existing The subgrade should be excavated and replaced or ground reinforcement treatment. In this case, the ground treatment measures are more selective, have many schemes, and are easy to implement. However, for urban areas or when there is no transitional condition for construction lines, and the normal operation of vehicles cannot be interrupted during the construction process, conventional foundation treatment measures are difficult to meet...

Claims

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Application Information

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IPC IPC(8): E02D3/00E02D5/46
Inventor 叶春林顾湘生李小和周宏元赵新益王卫国蒋和平江培兵贾军旺唐艳
Owner 广东省铁路规划设计研究院有限公司
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