Abstract
To investigate the vertical bearing performance of bored piles in deep sand areas, this paper presents a field static load test conducted for a project in Wuhan, elaborates on the advantages of bored piles, and comparatively studies the test results of single pile vertical ultimate bearing capacity under different pile length conditions, analyzing the differences in single pile bearing performance. The results indicate that in deep sand areas, the load-settlement curves at the pile top for different test zones all exhibit distinct inflection points, the vertical compressive ultimate bearing capacity values between the two differ by approximately 57.6%, and increasing pile length can enhance the single pile ultimate bearing capacity to a certain extent. When the pile foundation bearing capacity requirements are satisfied, rational selection of pile length parameters can effectively reduce construction costs, and the conclusions of this test can serve as a reference for similar practical engineering projects.
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Preamble
Field Study on Vertical Bearing Performance of Bored Piles in Deep Sand Areas
Huo Erlun¹, Yao Zhigang²
¹ China Railway 16th Bureau Group Third Engineering Co., Ltd., Huzhou, Zhejiang 313000, China
² Shaanxi Huaxin Hengye Construction Engineering Co., Ltd., Xi'an, Shaanxi 710065, China; Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China
Abstract
This paper investigates the vertical bearing performance of bored piles in deep sand areas through field static load tests conducted for a project in Wuhan. The advantages of bored piles are discussed, and test results for single pile vertical ultimate bearing capacity under different pile length conditions are comparatively analyzed to evaluate differences in bearing performance. The results demonstrate that in deep sand areas, the load-settlement curves at the pile head for different test zones all exhibit distinct inflection points, with the vertical compressive ultimate bearing capacity values differing by approximately 57.6% between the two conditions. Increasing pile length can improve single pile ultimate bearing capacity to a certain extent. When pile foundation bearing capacity requirements are satisfied, rational selection of pile length parameters can effectively reduce construction costs. These test conclusions provide valuable references for similar practical engineering projects.
Keywords: pile foundation engineering; bored piles; load-settlement curve