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Method for carrying out combined vacuum preloading treatment on soft foundation by gravel piles

A technology of weak foundation and crushed stone pile, which is applied in the field of weak foundation treatment to achieve good bearing capacity and stability, accelerate drainage and consolidation, and reduce post-construction settlement

Inactive Publication Date: 2015-06-17
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0003] In order to solve the problems exposed by the existing soft foundation treatment methods, the present invention proposes a new method of treating weak foundations with gravel piles combined with vacuum preloading

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  • Method for carrying out combined vacuum preloading treatment on soft foundation by gravel piles
  • Method for carrying out combined vacuum preloading treatment on soft foundation by gravel piles

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Embodiment Construction

[0007] A method for treating weak foundations with gravel piles combined with vacuum preloading, characterized in that the method comprises the following steps:

[0008] (1) Level the site and lay gravel cushions in the pretreatment area: Before leveling the site, various construction preparations should be done, such as removing all above-ground and underground obstacles in the site, removing surface water, laying temporary roads, etc., and then Fill and excavate earthwork construction according to design requirements. Then lay a 0.3m-0.4m thick fine gravel cushion in the pretreatment area, mainly to provide conditions for the construction of gravel piles, so that mechanical equipment can work normally in the pre-reinforcement area. Divide the pretreatment area into subdivisions, and carry out foundation treatment operations in each area at the same time.

[0009] (2) Construction of crushed stone piles: Vibrating sinking tube crushed stone pile machine is used for construct...

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Abstract

The invention relates to a method for treating a soft foundation. The method comprises the following steps: (1) leveling a field, and laying a gravel cushion layer in a pretreatment area; (2) carrying out gravel pile construction; (3) laying a vacuumizing pipe network; (4) laying the gravel cushion layer to the designed elevation; (5) laying a sealing film with good elasticity on the leveled gravel cushion layer, digging a seal pit around a pre-reinforcement area, and burying the sealing film into the seal pit; (6) vacuumizing, and pumping water and gas. According to the method, a composite foundation is formed by adopting the gravel piles and a vacuum preloading method, so that the advantage of good water permeability of the gravel piles can be exerted to the utmost extent, and the drainage consolidation of the surrounding soil is accelerated; therefore, the construction period is effectively shortened, the bearing capacity and stability of the foundation are improved, the post-construction settlement is reduced, and the reinforcement depth reaches more than 30m.

Description

technical field [0001] The invention relates to a method for treating weak ground, which is suitable for treating weak road bases such as newly dredged fill soil and muddy soil, and belongs to the technical field of civil engineering construction. Background technique [0002] We often encounter weak foundations in construction projects. Due to the development of large-scale buildings, expressways, and high-speed railways, the requirements for the bearing capacity and stability of the foundations are getting higher and higher. Natural weak roadbeds are far from meeting the requirements of today's expressways and railways. Design requirements. At present, the commonly used methods are: replacement cushion method, riprap method, surcharge preload method, dynamic compaction method, gravel pile method, chemical reinforcement method, and reinforced roadbed method. However, these methods have their own shortcomings for dealing with weak foundations, mainly manifested in poor rein...

Claims

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Application Information

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IPC IPC(8): E02D3/00E02D3/08E02D3/10
Inventor 刘文生姜千吴作启
Owner LIAONING TECHNICAL UNIVERSITY
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