STUDY ON BEARING CHARACTERISTICS OF BAMBOO-PILE SOIL-NAIL COMPOSITE SUPPORT SYSTEMS

DENG Yousheng; PENG Chengpu; CHENG Zhihe; YANG Ruijuan; FU Yunbo; LI Lingtao

doi:10.13204/j.gyjzG20100902

Volume 51 Issue 8

Nov. 2021

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2021 > 51(8): 141-147,38

DENG Yousheng, PENG Chengpu, CHENG Zhihe, YANG Ruijuan, FU Yunbo, LI Lingtao. STUDY ON BEARING CHARACTERISTICS OF BAMBOO-PILE SOIL-NAIL COMPOSITE SUPPORT SYSTEMS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 141-147,38. doi: 10.13204/j.gyjzG20100902

Citation:

DENG Yousheng, PENG Chengpu, CHENG Zhihe, YANG Ruijuan, FU Yunbo, LI Lingtao. STUDY ON BEARING CHARACTERISTICS OF BAMBOO-PILE SOIL-NAIL COMPOSITE SUPPORT SYSTEMS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 141-147,38. doi: 10.13204/j.gyjzG20100902

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STUDY ON BEARING CHARACTERISTICS OF BAMBOO-PILE SOIL-NAIL COMPOSITE SUPPORT SYSTEMS

doi: 10.13204/j.gyjzG20100902

1. School of Civil Engineering, Xi'an Traffic Engineering Institute, Xi'an 710300, China;
2. Research Center of Pile-Supported Structures, Xi'an University of Science and Technology, Xi'an 710054, China

Received Date: 2020-09-02
Available Online: 2021-11-10
Publish Date: 2021-11-10

Abstract

Abstract

Aiming at the problem of insufficient or excessive support for parallel single-row or double-row pile support systems in a large amount of shallow foundation excavation, a series of indoor model tests were conducted, the load-bearing characteristics of composite support systems were studied between the conventional single-row pile-soil-nail system and the dentate pile-soil-nail system. To different composite support structure, the distribution and evolution of laws on stress of piles, ground subsidence, horizontal displacement of pile tops and axial forces in soil nails were analyzed. The results showed that the piles arranged in serration bore a large part of loads acting on the composite support structure and the maximum positive and negative bending moments were 263.04 N·m and 198.25 N·m respectively, which were all less than the homologous ones in the structure of the sing-row pile support system. At the same time, the pile support system arranged in serration had a better capacity to restrain the displacement of the pile tops than the single-row pile support system. The axial stress of soil nails in the two types of support systems also showed the tend of "large in the middle parts and small in both ends", and the soil nails in the new support system had higher pullout resistance. It initially showed that the serrated bamboo-pile-soil-nail composite support system could be applied to shallow foundation excavation, and the support capacity was stronger than the traditional single-row pile composite support system, which could meet the temporary support requirements of foundation excavation.
- excavation engineering,
- bamboo pile,
- support structure,
- bamboo nail

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References(8)

References

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