A Comprehensive In Situ Investigation on the Reinforcement of High-Filled Red Soil Using the Dynamic Compaction Method

Lei Wang, Fenglei Du (), Yonghui Liang, Wensheng Gao, Guangzhe Zhang, Zhiqiang Sheng and Xiangsheng Chen
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Lei Wang: College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
Fenglei Du: School of Civil Engineering, Tsinghua University, Beijing 100084, China
Yonghui Liang: Shanghai Shenyuan Geotechnical Engineering Co., Ltd., Shanghai 200040, China
Wensheng Gao: Institute of Foundation Research, China Academy of Building Research, Beijing 100013, China
Guangzhe Zhang: Institute of Foundation Research, China Academy of Building Research, Beijing 100013, China
Zhiqiang Sheng: Institute of Foundation Research, China Academy of Building Research, Beijing 100013, China
Xiangsheng Chen: College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China

Sustainability, 2023, vol. 15, issue 6, 1-15

Abstract: High-filled red soil typically lacks sufficient bearing capacity, which can pose significant challenges when constructing building foundations. One economical and effective method for the reinforcement of high-filled red soil is the dynamic compaction (DC) method. However, the design parameters for reinforcing high-filled red soil using the DC method are largely based on experience, which indicates the significant value of field results of related engineering practice. In this paper, we report a field study that was carried out to investigate the effect of impact energy on the treatment of super-high-filled ground with red soil in southwestern Yunnan, China, where three pilot DC tests were designed and conducted with three different impact energies (4000 kN·m, 8000 kN·m and 15,000 kN·m). To evaluate the reinforcement effect and optimize the DC operational parameters, a series of in situ tests, including settlement monitoring, standard penetration tests, dynamic penetration tests, surface wave velocity tests and plate-load tests, were carried out. Furthermore, the improvement depth of DC was discussed. The results of the field study show that the characteristic value of the ground bearing capacity of the three test zones could reach 250 kPa, which coincides with the design requirement, although the improvement depth of testing zone III fails to reach the required depth. This study helps to improve the in situ recycling of high-filled soil, thereby promoting the sustainable development of engineering construction.

Keywords: high-filled ground; red soil; dynamic compaction; improvement depth; bearing capacity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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