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Method for carrying out dynamic compaction composite treatment on sludge soil foundation through gravel piles, drain board and upper filling body

A technology for compound treatment and gravel piles, which is applied in the fields of dynamic compaction and compound treatment of muddy soil foundations, drainage boards and gravel piles in the upper filling body

Inactive Publication Date: 2020-02-21
山西机械化建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for combined treatment of muddy soil foundation with gravel piles, drainage boards, and upper filling body dynamic compaction, especially for mud with a wide distribution range, large thickness, uneven distribution, and large thickness changes Textile soil foundation, giving full play to the respective advantages of gravel piles, plastic drainage board surcharge preloading and dynamic ramming dynamic consolidation, complementing each other's advantages, and avoiding the defects of a single foundation treatment method

Method used

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  • Method for carrying out dynamic compaction composite treatment on sludge soil foundation through gravel piles, drain board and upper filling body
  • Method for carrying out dynamic compaction composite treatment on sludge soil foundation through gravel piles, drain board and upper filling body
  • Method for carrying out dynamic compaction composite treatment on sludge soil foundation through gravel piles, drain board and upper filling body

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Embodiment 1

[0070] This embodiment provides a method for combined treatment of muddy soil foundation with gravel piles, drainage boards, and upper filling body dynamic compaction, including the following steps:

[0071] S1, laying construction cushion

[0072] After the surface of the site is cleared, a medium-weathered sandstone cushion with a preset thickness is laid and leveled, and compacted with a vibratory roller to meet the needs of the pile driver;

[0073] S2, for the construction of gravel pile 1, the vibrating pipe sinking method is used to form an artificial foundation in which the weak foundation soil and the vertical reinforcement of gravel pile 1 jointly bear the load;

[0074] S3, laying the geotextile and cushion under the gravel pile top, and laying the water-permeable geotextile 2 and the graded gravel cushion 3 on the artificial foundation to form the lower base of the horizontal drainage cushion;

[0075] S3.1, laying the geotextile under the drainage cushion

[007...

Embodiment 2

[0088] In the southwestern region of my country, there are engineering problems such as wide distribution range, large thickness, uneven distribution and large thickness variation of muddy soil foundation. Among them, the soft soil such as valley pond silt has a large buried depth, with an average of about 5m and a maximum buried depth of 13m. The silty soil has a water content greater than the fluidity limit, a large void ratio, low mechanical strength, and strong compressibility. Due to its complex structure and large amount of compression deformation, it is difficult to control the post-construction settlement of the road foundation.

[0089] 1. Construction procedures and parameters

[0090] 1.1 Laying construction cushion

[0091] After the surface of the site is cleared, a 50cm-thick medium-weathered sandstone cushion is laid and leveled, and compacted with a vibratory roller. The compaction degree is required to be ≥ 90% to meet the requirements of the pile driver.

...

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Abstract

The invention provides a method for carrying out dynamic compaction composite treatment on a sludge soil foundation through gravel piles, a drain board and an upper filling body, and belongs to the technical field of building foundation treatment. The method comprises the steps that S1, a construction cushion layer is laid; S2, construction of the gravel piles is achieved, and a vibration sunken tube method is adopted; S3, geotechnical cloth and a cushion layer below the tops of the gravel piles are laid; S4, construction of the plastic drain board is achieved; S5, an upper cushion layer and geotechnical cloth are laid; and S6, layered and staged dynamic compaction of the filling body is achieved. By means of the method, the advantages of preloading and dynamic compaction dynamic consolidation of the gravel piles and the plastic drain board are achieved fully, the advantages are complemented, and the defects of a single foundation treatment method are avoided.

Description

technical field [0001] The invention belongs to the technical field of building foundation treatment, and specifically discloses a method for combined treatment of muddy soil foundation by dynamic compaction of gravel piles, drainage boards and upper filling bodies. Background technique [0002] At present, the land for construction is becoming more and more scarce, the engineering geological conditions of the construction land are becoming worse and worse, and the difficulty of foundation treatment is also increasing. At the same time, the level of engineering construction projects is getting higher and higher, and the requirements for engineering technical indicators such as the bearing capacity and deformation of the foundation are also getting higher and higher. On the coast, in the middle and lower reaches of rivers or near lakes, there are deep Quaternary soft overburdens buried under the surface, mainly including delta facies deposits, littoral facies deposits, lacust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D3/08E02D3/10
CPCE02D3/00E02D3/08E02D3/10
Inventor 杨印旺关秀丽郭伟林王兴华马荣郜强张洁玙谢俊平贺亚琴王东
Owner 山西机械化建设集团有限公司
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