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Construction structure and method of plastic drainage board and CFG pile soft foundation treatment transition section

A technology of plastic drainage board and soft foundation treatment, which is used in infrastructure engineering, soil protection, roads, etc., can solve the problems of large transition section, differential settlement, and insufficient consideration of the difference in stiffness of composite foundations, so as to reduce settlement. difference, reduce stiffness difference, eliminate the effect of post-construction settlement

Pending Publication Date: 2019-08-30
CHINA RAILWAY ERJU 1ST ENG
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Problems solved by technology

In engineering, the overload preloading method is commonly used to deal with it. During the treatment, the load is symmetrically stacked on both sides of the transition section. However, this treatment method does not fully consider the stiffness difference between the two composite foundations. During construction and after completion, the transition section will produce a large differential settlement

Method used

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  • Construction structure and method of plastic drainage board and CFG pile soft foundation treatment transition section

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Embodiment

[0018] refer to figure 1 , this embodiment provides a construction structure for the transition section between plastic drainage board and CFG pile soft foundation treatment, including the first soil body 1 and the second soil body 2, and the first soil body 1 and the second soil body 2 are integrated structures , the first soil body 1 and the second soil body 2 are filled above the transition section between the plastic drainage board reinforcement area 3 and the CFG pile reinforcement area 4, and the first soil body 1 is filled in the front of the plastic drainage board reinforcement area 3 Above, the second soil body 2 is filled directly above the CFG pile reinforcement area 4, the height of the first soil body 1 is four times the height of the second soil body 2, and the first soil body 1 and the second soil body 2 are in plastic The width above the drainage plate reinforcement area 3 and the CFG pile reinforcement area 4 is the same.

[0019] The construction method is a...

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Abstract

The invention provides a construction structure and method of a plastic drainage board and CFG pile soft foundation treatment transition section, and belongs to the field of subgrade engineering softfoundation construction. The construction method comprises the steps: after a plastic drainage board and a CFG pile are driven in a soil layer, soil bodies with two or more types of heights are stacked above a transition area in a filled mode in a graded filling mode, after stacking filling is completed, certain prepressing time is kept, after the foundation soil bodies reach the consolidation degree and strength meeting the requirement, overload soil bodies are unloaded, and then a subgrade and a pavement structural layer are constructed to reduce or even eliminate difference sedimentation between two treatment modes so as to ensure the safety of road operation.

Description

technical field [0001] The invention relates to a construction structure and method for a transition section of soft foundation treatment between a plastic drainage board and a CFG pile, and belongs to the field of soft foundation construction of roadbed engineering. Background technique [0002] In our country, the distribution of soft soil is very wide, with distribution in inland areas, coastal areas and plains. Due to the characteristics of high moisture content and low bearing capacity of soft soil, when building projects on soft soil, insufficient bearing capacity and large post-construction settlement often occur. Therefore, when the soil layer is soft soil layer , it needs to be strengthened. In actual engineering treatment, due to the limitations of soil properties, geological topography, and construction period, two or more ground treatment methods are often used for soft foundation reinforcement. The common treatment methods are directed to the soil layer. When ...

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Application Information

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IPC IPC(8): E02D3/10E02D3/08E01C3/04
CPCE02D3/10E02D3/08E01C3/04
Inventor 王永亮冯君肖朝乾张晓英孙文彬张勇杜守宁席茂苟吉虎赵杰朱玺贾生平何宇航
Owner CHINA RAILWAY ERJU 1ST ENG
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