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Reinforcing structure and method of roadbed foundation of structure with basaltic layer sandwiched between soft soil layers

A basalt layer and reinforcement structure technology, applied in soil protection, infrastructure engineering, roads, etc., can solve problems such as strict construction control requirements, high project cost, and slow progress

Pending Publication Date: 2018-04-20
CHINA RAILWAY ENG CONSULTING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is difficult to pass through the basalt interlayer in the weak foundation, the engineering drilling rig is usually used to lead the hole, but this treatment method requires strict construction control, slow progress, and high engineering cost

Method used

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  • Reinforcing structure and method of roadbed foundation of structure with basaltic layer sandwiched between soft soil layers
  • Reinforcing structure and method of roadbed foundation of structure with basaltic layer sandwiched between soft soil layers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 A cross-sectional schematic view of the reinforcing structure in this embodiment is shown. The reinforcing structure in the present invention can be applied to the subgrade foundation of the soft soil layer sandwiching the basalt layer structure, and the soft soil layer sandwiching the basalt layer structure is from top to bottom , followed by a structure of soft soil layer-basalt layer-soft soil layer, and the soft soil includes soft soil. The reinforcement structure includes:

[0029] At least two rows of first reinforcement piles 5, the top of each first reinforcement pile 5 protrudes into the roadbed 100, and the lower ends of the first reinforcement piles 5 pass through the soft soft layer above the basalt layer of the roadbed foundation in turn. The soil layer, the basalt layer and the soft soil layer at the bottom of the basalt layer, the first reinforcement piles 5 are horizontally arranged, and the number is 2 or more, which can be symmetrically and e...

Embodiment 2

[0037] figure 2 Shown is a method for reinforcing a roadbed foundation with a soft soil layer sandwiching a basalt layer structure, which includes the following steps:

[0038] S1, setting at least one row of second reinforcement piles 4 in the soft soil layer above the basalt layer;

[0039] S2. Lay a gravel cushion 3 on the top of the soft soil layer above the basalt layer, and connect the top of each second reinforcement pile 4 to the gravel cushion 3;

[0040] S3, filling in layers above the gravel cushion 3 to form a roadbed 100, and setting a bearing plate 1 inside the roadbed 100;

[0041] S4, setting the first reinforcement pile 5, so that the top of the first reinforcement pile 5 extends into the roadbed 100, and makes the lower end of the first reinforcement pile 5 pass through the upper part of the basalt layer of the roadbed foundation in sequence The soft soil layer, basalt layer and the soft soil layer below the basalt layer extend into the bearing layer or ab...

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Abstract

The invention discloses a reinforcing structure of a roadbed foundation of a structure with a basaltic layer sandwiched between soft soil layers. The reinforcing structure comprises at least two rowsof first reinforcing piles and at least one row of second reinforcing piles, the top end of each first reinforcing pile extends into the foundation, and the lower end of each first reinforcing pile sequentially penetrates through the soft soil layer on the upper portion of the basaltic layer, the basaltic layer and the soft soil layer on the lower portion of the basaltic layer of the roadbed foundation; and each second reinforcing pile is arranged in the soft soil layer on the upper portion of the basaltic layer. The reinforcing structure and method of the foundation composed of long reinforced concrete bored piles + bearing plates + short cement mortar mixing piles + a gravel cushion layer are adopted and are used for high-speed railway settlement deformation control. The mode that long pile treatment and short pile treatment are combined, and rigid piles and flexible piles cooperate to act is adopted, so that the technology is economical and reasonable and high in adaptability, and technical and economic benefits are obvious.

Description

technical field [0001] The invention relates to the field of roadbed engineering, in particular to a reinforcement structure and a reinforcement method for a roadbed foundation with a soft soil layer sandwiched basalt layer structure. Background technique [0002] The key to the subgrade design of high-speed railways lies in the control of post-construction settlement and deformation. Especially for high-speed railways with ballastless tracks, the control requirements for settlement and deformation have reached the millimeter level, which is much higher than the control standards for ordinary railways and industrial and civil buildings. In order to strictly control the post-construction settlement and deformation of the subgrade, the main methods for the treatment of soft soil and soft soil foundation of high-speed railways are: mixing pile, compaction pile, CFG pile, screw pile, etc.; the pile top structure mainly includes crushed stone reinforced cushion, Lime-soil reinfor...

Claims

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Application Information

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IPC IPC(8): E01C3/04E02D3/00
CPCE01C3/04E02D3/00
Inventor 崔俊杰姚瑞珽杜文山刘明宇马旭东王晶张世杰周先才向俊红
Owner CHINA RAILWAY ENG CONSULTING GRP CO LTD
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