Performance Improvement in Pile Anchor System for Deep Foundation Excavation Using Electroosmotic Chemical Treatment

Authors

Lei Zhang, Jiangsu University of Science and Technology
Bing-Hui Wang, Jiangsu University of Science and Technology
Li-Yan Wang, Jiangsu University of Science and Technology
Li-Ping Jing, China Earthquake Administration
Chen Fang, University of Nebraska - LincolnFollow
Zhen-Dong Shan, China Earthquake Administration

ORCID IDs

https://orcid.org/0000-0001-6235-0864

https://orcid.org/0000-0003-2722-4496

https://orcid.org/0000-0002-6564-1090

https://orcid.org/0000-0002-1675-0151

Document Type

Article

Date of this Version

8-14-2019

Citation

2019 Lei Zhang et al.

Comments

Hindawi Advances in Civil Engineering Volume 2019, Article ID 3168912, 10 pages https://doi.org/10.1155/2019/3168912

Abstract

Anchoring force is vital to ensure the acceptable performance of a pile anchor system when supporting deep foundation excavation. .e soft soil has several physical properties, such as low shear strength, high water content, large void ratio, and high flowability. Traditional grouting and anchoring techniques have demonstrated technical limits to deal with these soil properties in engineering projects, and accordingly, the anchoring force in the pile anchor system is difficult to meet design requirements. .is paper conducted an experimental investigation on the performance improvement in a pile anchor system using the electroosmotic chemical treatment method, with an emphasis on the deep foundation application. Experimental tests and field studies were designed to enhance anchor capacity of a pile anchor system using self-designed devices. .e laboratory experiments utilized a simplified anchor system in which anchors were designed as the electrodes to conduct the electroosmotic chemical treatment and consolidate the soft marine soil collected from the project site. In addition, static load tests were conducted on the tested soil to measure the anchoring force. Finally, parametric analyses were performed to investigate effects of several parameters on anchoring force in terms of the ultimate pull-out capacity of the anchor, identifying critical parameters for the field study. Based on laboratory test results, field studies were carried out in the Yingkou city. .e results from field studies were compared with laboratory test results to validate feasibility of electroosmotic chemical treatment for a pile anchor system.