Layered Treatment for Construction Waste Slurry by Vacuum Preloading Methods Combined Vertical Drains with Horizontal Drains

JIN Jinqiang; XU Xiangming; XU Mintao; YANG Bin; REN Feng'e; QIU Han; LYU Youchang; FU Hongtao; LI Xiaobing; CAI Ying; CHEN Zhijian

doi:10.3724/j.gyjzG23101705

Volume 55 Issue 2

Feb. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(2): 195-205

JIN Jinqiang, XU Xiangming, XU Mintao, YANG Bin, REN Feng'e, QIU Han, LYU Youchang, FU Hongtao, LI Xiaobing, CAI Ying, CHEN Zhijian. Layered Treatment for Construction Waste Slurry by Vacuum Preloading Methods Combined Vertical Drains with Horizontal Drains[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(2): 195-205. doi: 10.3724/j.gyjzG23101705

Citation:

JIN Jinqiang, XU Xiangming, XU Mintao, YANG Bin, REN Feng'e, QIU Han, LYU Youchang, FU Hongtao, LI Xiaobing, CAI Ying, CHEN Zhijian. Layered Treatment for Construction Waste Slurry by Vacuum Preloading Methods Combined Vertical Drains with Horizontal Drains[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(2): 195-205. doi: 10.3724/j.gyjzG23101705

Citation:

JIN Jinqiang, XU Xiangming, XU Mintao, YANG Bin, REN Feng'e, QIU Han, LYU Youchang, FU Hongtao, LI Xiaobing, CAI Ying, CHEN Zhijian. Layered Treatment for Construction Waste Slurry by Vacuum Preloading Methods Combined Vertical Drains with Horizontal Drains[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(2): 195-205. doi: 10.3724/j.gyjzG23101705

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Layered Treatment for Construction Waste Slurry by Vacuum Preloading Methods Combined Vertical Drains with Horizontal Drains

doi: 10.3724/j.gyjzG23101705

1. Wenzhou Oufei Development Construction Investment Group Limited Company, Wenzhou 325000, China;
2. Wenzhou Longda Reclamation Development and Construction Limited Company, Wenzhou 325000, China;
3. College of Civil Engineering and Architecture of Wenzhou University, Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Zhejiang Engineering Research Center of Disaster Prevention and Mitigation for Coastal Soft Soil Foundation, Collaborative Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou 325035, China

Received Date: 2023-10-17
Available Online: 2025-04-02

Abstract

Abstract

The effect of the traditional vacuum preloading method is often not ideal when treating engineering waste slurry, and the vertical drainage plate is easy to bend and deform. To improve the effect of drainage consolidation, consider the respective treatment characteristics of horizontal drainage plates and vertical drainage plates in the vacuum preloading method. The method of vacuum preloading and layered treatment for engineering waste slurry combined horizontal drains with vertical drains was proposed. Through 6 groups of indoor model tests, the advantages and disadvantages of three vacuum preloading methods, namely horizontal drainage plates-vacuum preloading method (PHDs), vertical drainage plates-vacuum preloading method (PVDs). and horizontal combined vertical drainage plate-vacuum preloading method (the combination of PHDs and PVDs), were studied and analyzed, and a more efficient vacuum preloading method was selected to treat engineering waste slurry. The test results of vacuum degree, pore water pressure dissipation, soil surface settlement, cumulative water discharge, vacuum, soil moisture content and cross plate shear strength after vacuum consolidation were compared and studied in different test groups. The test results showed that when PVDs were used, the bottom treatment effect was not ideal, and the reinforcement effect of the general soil was weakening along the depth of the soil layer. When the combination of PHDs and PVDs was used, the reinforcement effect of deep soil could be effectively improved, and the heap stress provided by the high vacuum pressure and the self-weight of the upper soil could effectively promote the vacuum consolidation of the bottom soil. When PHDs were used, the overall reinforcement effect was better than that of PVDs, but the drainage path in the middle of each two layers of drainage boards and the surface of the soil layer was longer, resulting in poor treatment effect. When the combination of PHDs and PVDs was used, the strength of the upper and bottom soil could be improved at the same time, making the overall treatment effect was more uniform, the strength of the upper soil and the bottom soil could be improved at the same time, so that the overall treatment effect was more uniform. The average strength of soil could reach 18 kPa to 24 kPa, which was about 20% higher than the overall treatment effect of PHDs and 25% to 35% higher than that of PVDs.
- vacuum preloading,
- the combination of PHDs and PVDs,
- anti-clogging,
- surface drainage path

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References(26)

References

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