According to the character that the seepage amount of pile foundation is large during the construction period in karst water-rich area, and take the fact that the drops of water level lead the settlement of the ground around the pile foundation into account, a method of surface settlement estimation based on diving full well and steady seepage was analyzed. According to the seepage theory, the effective stress increment of soil unit around the pile foundation was deduced. By means of the double integral within the scope of two-dimension range, the settlement due to seepage effect and its estimation formula of surface around the pile foundation was analyzed. On the basis of real project of NO.3 section of Hechi-Du’an Expressway in Guangxi Zhuang Autonomous Region, the ground settlement was forecasted through the way of field measurement and formula estimation respectively. Facts and figures show that the measured value is consistent with the estimation value, but within the scope of 3m apart from the pile edge, the measured value is greater than the estimation value. The result can provide certain reference for the forecast of ground settlement created by dewatering.

Xia Wu. Study on Estimation Method of Ground Settlement around Pile Foundation Caused by Dewatering. Academic Journal of Engineering and Technology Science (2021) Vol. 4, Issue 5: 44-47. https://doi.org/10.25236/AJETS.2021.040508.

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