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Construction treatment method of collapsible loess foundation

A technology for collapsible loess and foundation treatment, which is applied in infrastructure engineering, soil protection, construction, etc., and can solve problems such as difficult construction, unsatisfactory treatment effect, and high project cost

Inactive Publication Date: 2018-12-18
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in the process of collapsible loess foundation construction, common treatment methods include replacement filling method, compaction pile method, pile foundation method through soil layer, etc. Unsatisfactory effects and other limitations

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  • Construction treatment method of collapsible loess foundation

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Embodiment 1

[0022] as the picture shows, figure 1 It is an engineering example process diagram of a collapsible loess foundation construction treatment method of the present invention.

[0023] 1) if figure 1 As shown in Figure I, in the collapsible loess soil layer with a thickness of 32m, the closed steel casing 2 with a diameter of 800mm is sunk by hammer 1, and the pile hole is formed at a depth of 30m. The steel casing 2 is a conical bottom.

[0024] 2) if figure 1 As shown in Figure II, three rows of hollow water-injection steel pipes 3 with a diameter of 180 mm are inserted into the pile holes, among which the water-injection steel pipes 3 are reasonably arranged with water injection nozzles 4 at different elevations according to the soil thickness and water content to form water injection channels.

[0025] 3) if figure 1 As shown in Figure III, high-pressure water is injected into the combined water injection steel pipe 3 through the high-pressure water pump 5, and the inject...

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Abstract

The invention provides a construction treatment method of a collapsible loess foundation. The construction treatment method comprises the main steps that (1) a closed steel pile casing is sunk withinthe construction range of the collapsible loess foundation so as to form pile holes; (2) one two three rows of hollow steel pipes with nozzles are inserted into the pile holes; (3) operation of the step (1) and the step (2) is repeated to form the pile holes evenly and fully distributed and provided with water injection devices; (4) a high-pressure pump device is utilized for injecting water intothe hollow steel pipes in a pressurization manner; (5) the soil sedimentation condition and the sedimentation amount are observed and recorded till soil naturally deforms to tend to be stable; and (6)reinforcement materials are supplemented into the pile holes, and a dynamic consolidation method or a compaction method is adopted for carrying out reinforcement treatment on the soil on the upper layer of the foundation. The construction treatment method has the advantages of achieving dry operation, being high in construction speed, good in economic effect and high in foundation soil bearing capacity and the like.

Description

Technical field: [0001] The invention relates to a foundation construction method, in particular to a collapsible loess foundation treatment method, which belongs to the field of civil engineering. Background technique: [0002] my country has a vast territory and complex geographical environment. Loess soil bases are widely found in North China, Central China, and Northeast China, and most of them are collapsible. Collapsible loess is a kind of soil with special properties, its soil quality is relatively uniform, its structure is loose, and its pores are developed. When not wetted by water, it generally has higher strength and less compressibility. When soaked by water under a certain pressure, the soil structure will be destroyed rapidly, resulting in a large additional subsidence, and the strength will decrease rapidly. [0003] At present, in the process of collapsible loess foundation construction, common treatment methods include replacement filling method, compactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00
CPCE02D3/00
Inventor 肖智杨健杨红飞
Owner CHINA MCC17 GRP
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