Study on effect of vacuum preloading method improving hydraulic filled soft clay

2011 ◽  
Author(s):  
Zhao Lizhi ◽  
Zhu Ping ◽  
Liu Run
Keyword(s):  
Soft Clay ◽  
Vacuum Preloading ◽  
Preloading Method

scholarly journals Analysis of the application results of the traditional vacuum preloading method: A case study

2020 ◽  
Vol 198 ◽  
pp. 01032
Author(s):  
Wenbin Liu
Keyword(s):  
Soft Clay ◽  
Sand Layer ◽  
Clay Layer ◽  
Site Testing ◽  
Vacuum Preloading ◽  
Bearing Strength ◽  
Testing Data ◽  
Lateral Drainage ◽  
Preloading Method

The traditional vacuum preloading method is a common way for enhancing the bearing strength of the soft clay layer. In general, a serious of plastic drainage boards are plugged into the soft clay foundation, and a sand layer is covered above the soft clay layer to establish a space for lateral drainage of the clay before applicating vacuum load. This paper analysed the application results of the traditional vacuum preloading method with the help of the data from an engineering case. The in-site testing data of the variation of the pore pressure in clay layer and the settlement are collected to evaluate the benefit of traditional vacuum preloading method.

scholarly journals Experimental study on a dredged fill ground improved by a two-stage vacuum preloading method

2018 ◽  
Vol 58 (3) ◽  
pp. 766-775 ◽  
Author(s):  
Jun Wang ◽  
Yuanqiang Cai ◽  
Hongtao Fu ◽  
Xiuqing Hu ◽  
Ying Cai ◽  
...  
Keyword(s):  
Experimental Study ◽  
Two Stage ◽  
Vacuum Preloading ◽  
Preloading Method

scholarly journals Design Method and Verification of Electroosmosis-Vacuum Preloading Method for Sand-Interlayered Soft Foundation

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Yunliang Cui ◽  
Jianbo Tu ◽  
Xinquan Wang ◽  
Hongguo Diao ◽  
Qianru Ge
Keyword(s):  
Design Method ◽  
Simulation Method ◽  
Electrical Circuit ◽  
Test Results ◽  
Vacuum Preloading ◽  
Foundation Treatment ◽  
Vertical Drain ◽  
Soft Foundation ◽  
Prefabricated Vertical Drain ◽  
Preloading Method

The design method of electroosmosis-vacuum preloading for soft foundation treatment is not systematic and complete, thereby restricting the application of the technology in engineering. A design method for the electroosmosis-vacuum preloading treatment of sand-interlayered soft foundation is therefore presented. A compressible electrical prefabricated vertical drain is developed, and a vacuum sealing and draining system is designed for the application of the electroosmosis-vacuum preloading in sand-interlayered soft foundation. Calculation formulas of site resistance considering the interlayer and interface resistivity of the electrode are established to design the power supply and electrical circuit. A simple numerical simulation method is proposed to predict the ground settlement treated by electroosmosis-vacuum preloading. A field test of electroosmosis-vacuum preloading is designed using the suggested method, and comparison tests between the electroosmosis-vacuum preloading and the vacuum preloading are performed to verify the proposed technique. The test results show that the proposed design method is reasonable for the design of electroosmosis-vacuum preloading in engineering.

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