Optimization Method of Reducing the Differential Settlements of Piled Raft Foundations Based on Pile‐to‐Pile Interaction Theory

Abstract

In order to reduce the differential settlement of piled raft foundations, an optimization method based on pile-to-pile interaction theory is proposed in this paper, which translates the problem of pile-to-pile interaction (PPI) in pile groups into that in single piles using the interaction factor method. The pile lengths were adjusted via the relationship between load, settlement, and the length of single piles during the optimization design. ANSYS software, in conjunction with nonlinear elastic soil model, is used to analyze piled raft foundation models. Two cases with different safety factors that suffer different kinds of surface loads (uniform load and nonuniform load) are used to verify this method. The differential settlements of the raft in different cases are all reduced by nearly or more than 80% after optimization design. The results show that the optimization method proposed in this paper has high efficiency and stability. This study can help practicing engineers optimize the pile lengths in pile groups to satisfy higher differential settlement requirements.

Displacement Monitoring during the Excavation and Support of Deep Foundation Pit in Complex Environment

“…Combined with the engineering characteristics and site conditions, double row triple highpressure jet grouting piles are constructed around the foundation pit to strengthen the surrounding soil and cut off the seepage path of the peripheral groundwater into the foundation pit. e foundation pit support method is "double row jet grouting pile sealing curtain + artificial excavated pile + anchor cable," which is widely used in the foundation engineering [29,30]. e layout of foundation pit monitoring points is shown in Figure 1, where C1-C4 represent the driveway.…”

Geotechnical performance of combined stone columns and piles capped with reinforced concrete raft foundation in soft clay soil

“…Similarly, many researchers have studied piled raft foundation systems. It has been reported that by increasing the pile length, pile diameter, aspect ratio, number of piles, and raft foundation thickness, the overall performance of piled raft foundations improves considerably (e.g., El-Garhy et al, 2013;Lin and Feng, 2006;Mali and Sing, 2020;Sinha and Hanna, 2017;Vu et al, 2014;Xie and Chi, 2020).…”