Performance Tests on Pressure-Dispersed Compression Anchors in Cohesive Soils
Publication: International Journal of Geomechanics
Volume 21, Issue 3
Abstract
Pressure-dispersed compression anchor consists of several anchor units fitted with an end plate. Limited field tests have been conducted to investigate the performance of a pressure-dispersed compression anchor system in cohesive soil. This paper conducted a series of field pullout loading test of pressure-dispersed compression anchors in clay soils, considering the following influence factors of stressing sequence, grouting method and compensation load. The simultaneous stressing yielded less pullout capacity than the individual stressing because of the relatively large interaction between the units. With the increase of the load level, the movement ratio decreased with a gradually decreased rate, followed by a slight increase when the load level exceeded 0.7. The rebound stiffness declined as the load level increased and the individual stressing yielded smaller reduction in the rebound stiffness than the simultaneous stressing. The back calculation indicated that the effective anchor diameter was enlarged by 10% due to the post grouting with a grouting factor of 0.2.
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Data Availability Statement
The test results of test No. 4 are deposited in the Tongji Nutstore (https://upan.tongji.edu.cn/p/DVYmwo0QhFAYiSE), including the measured load and movement at the anchor head in loading-unloading process, and the measured strains along each unit.
The test datum of test Nos. 1–3 and 5, including the measured load and movement at the anchor head in loading-unloading process, and the measured strains along each unit, are only available from the corresponding author upon reasonable request.
The authors appreciate the financial support provided by the Natural Science Foundation of China (NSFC) (Grant Nos. 41772281 and 41972272). This study was also financially supported by the Key Research and Development Project of Chinese Ministry of Science and Technology (Grant No. 2016YFE0105800).
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Published In
International Journal of Geomechanics
Volume 21 • Issue 3 • March 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Feb 11, 2020
Accepted: Oct 9, 2020
Published online: Jan 12, 2021
Published in print: Mar 1, 2021
Discussion open until: Jun 12, 2021
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