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Vacuum prepressing-overloading-dynamic compaction combined consolidometer

A preloading and vacuum technology, applied in the field of geotechnical engineering, can solve the problems that the vacuum degree is difficult to reach the deep soil, it is difficult to meet the practical application of engineering, and the loss of vacuum degree along the way is large, so as to achieve good consolidation drainage effect and shorten the solidification time. The effect of shortening time and increasing value

Active Publication Date: 2014-05-28
WENZHOU UNIVERSITY
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  • Application Information

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Problems solved by technology

However, when dealing with deep soft clay foundations, using the vacuum preloading method alone will result in low reinforcement efficiency, long processing time, and a large loss of vacuum degree along the way, making it difficult for the vacuum degree to reach the deep soil, and the reinforcement effect is not good. Difficult to meet the needs of practical engineering applications
Therefore, in engineering, vacuum preloading and surcharge are often combined to treat deep soft soil, which achieves a better reinforcement effect than purely using vacuum preloading or surcharge, and greatly shortens the reinforcement time. However, due to the lack of The indoor device for simulating the consolidated soil samples of this kind of joint reinforcement foundation, currently this joint reinforcement method mainly relies on the experience of technicians in engineering, and lacks accurate design and calculation parameters

Method used

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  • Vacuum prepressing-overloading-dynamic compaction combined consolidometer
  • Vacuum prepressing-overloading-dynamic compaction combined consolidometer
  • Vacuum prepressing-overloading-dynamic compaction combined consolidometer

Examples

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Embodiment 1

[0021] Embodiment 1, the outer wall of the soil sample chamber 4 and the air pressure chamber 2 is a cylindrical cavity made of polyvinyl chloride (PVC), the cavity height is 1000mm, the inner diameter is 500mm, and the wall thickness is 10mm; The piston 3 separating the air pressure chamber 2 and the soil sample chamber 4 is made of alloy material with a thickness of 35 mm, and a hole with a diameter of 5 mm is left in the middle for the passage of the drain hose between the drain plate cap 6 and the piston connection chamber 1; the air pressure chamber 2. The top cover 7 is made of steel, with a diameter of 600 mm and a thickness of 10 mm. A circular channel with a diameter of 100 mm is left at the center of the top cover 7 for hooping on the outer wall of the piston connecting chamber 1. The distance between the top cover 7 and the center of the circle is 150 mm. There are four holes with a diameter of 6mm in two orthogonal directions, and the four rubber hoses respectively ...

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Abstract

The invention belongs to the technical field of geotechnical engineering and in particular relates to experiment equipment for reinforcing soft soil by combining vacuum prepressing and overloading. At present, the combined reinforcing method mainly depends on the experience of a technicist, so that accurate design calculation parameters are absent. The invention aims to design an indoor device for simulating vacuum prepressing and overloading combined soil sample solidification; therefore, the design accuracy and the reinforcement efficiency of the combined reinforcement method can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an experimental device for combined reinforcement of soft soil by means of vacuum preloading and surcharge. Background technique [0002] Most of the coastal areas in my country belong to weak foundation soil, which is characterized by high water content, high compressibility, low strength and poor permeability. To carry out large-scale construction on this foundation soil, such as large-scale reclamation projects, the foundation needs to be treated and reinforced. Common construction methods include surcharge preloading, vacuum preloading, electroosmotic consolidation, etc. [0003] Since the vacuum preloading method was successfully applied in the late 1980s, a large number of engineering practices have proved that it is one of the most effective methods for soft soil reinforcement, and it is still the main foundation treatment method for soft soil ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 王军蔡袁强谷川王鹏熊焕丁光亚胡秀青
Owner WENZHOU UNIVERSITY
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