Development of trench side protection slurry for diaphragm walls in sandy gravel and boulder layers

ZHOU Changjun; HE Ye; XIE Chengchao; WANG Sheng; HE Xin; TANG Qingdong and LI Shouxin; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.02.013

2023 Vol. 50, No. 2

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Article navigation > DRILLING ENGINEERING > 2023 > 50(2): 92-99

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ZHOU Changjun, HE Ye, XIE Chengchao, WANG Sheng, HE Xin, TANG Qingdong and LI Shouxin, . 2023. Development of trench side protection slurry for diaphragm walls in sandy gravel and boulder layers. DRILLING ENGINEERING, 50(2): 92-99. doi: 10.12143/j.ztgc.2023.02.013

Citation:

ZHOU Changjun, HE Ye, XIE Chengchao, WANG Sheng, HE Xin, TANG Qingdong and LI Shouxin, . 2023. Development of trench side protection slurry for diaphragm walls in sandy gravel and boulder layers. DRILLING ENGINEERING, 50(2): 92-99. doi: 10.12143/j.ztgc.2023.02.013

Development of trench side protection slurry for diaphragm walls in sandy gravel and boulder layers

1.Chengdu Hydroelectricity Construction Engineering Co., Ltd of Sinohydro Bureau No.7 Company,Chengdu Shichun 611130, China;
2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology, Chengdu Shichun 610059, China

More Information

Corresponding author: WANG Sheng, yongyuandewangsheng@sina.com

Received Date: 28 June 2022

Revised Date: 20 October 2022

Abstract

Abstract

The traditional bentonite mud can hardly meet the engineering requirements because of serious slurry leakage， frequent trench side collapse， and highly increased construction cost. On the basis of theoretical analysis， experimental research was carried out to develop a new type of trench side protection mud by comprehensive modification of natural clay mud to solve the problem of trench side collapse in sand， gravel， and boulder layers. The basic modifier CN-1 was determined through the optimization test to improve its suspension stability. On this basis， the adhesive lifting agent （CG-14S） and the cooperative plugging agent （DFD-2） were further obtained through optimization to improve its comprehensive performance index. The optimized formula was determined by orthogonal test， and the performance and cost evaluation was carried out. Field tests were conducted， and a modified clay mud for trench side protection was finally developed. It is made up of 15% natural clay+0.2%CN-1+0.4‰CG-14S+0.5‰DFD-2， and can be used in the construction of the diaphragm wall in gravel and boulder layers. The research results provide an option for solving the problem of trench side collapse in the construction of the diaphragm wall in complex strata.
- s and gravel layer /
- diaphragm wall /
- trenching mud /
- modified clay mud /
- side protection mud

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References

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