PIANC Smart Rivers 2022

Reviewing full paper

Topic:

Title:

Author(s):

Author 1

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 2

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Abstract : *(250~1000 words)

Anchored Sheet pile walls have been extensively applied in inland waterways, navigation locks, urban and coastal ports, cut-off walls, cofferdams and waterfront structures due to their adaptability, flexibility and low cost at the site. This paper presents a novel structure, the combined sheet pile wall structure, which consists of a anchored sheet pile wall and deep mixing (DM) piles. To fully understand the behaviour of the combined sheet pile wall structure in soft ground, a finite element numerical analysis was carried out during excavating and backfilling construction, and the results were compared with that of centrifuge test. The performance of the structure and soil is described and discussed, including the lateral deflection, bending moment and lateral earth pressure. Measurements and computed results have shown that the lateral deflection of the sheet pile wall can be significantly reduced, and the lateral earth pressure on a sheet pile wall is shielded due to the dowel effect of the DM pile rows behind the sheet piling. The bending moment of the DM piles are generally greater than those of the sheet pile and anchor wall, indicating that the DM piles composite foundation is efficient for reducing the loads acting on the sheet pile. The effects of the the DM piles composite foundation can be summarized as a combination of blocking effect of the composite foundation to carry the lateral earth pressures as well as a load-relieving effect of the deep mixing piles to transfer the vertical loads to deeper foundation soils through the piles. In addition, a sensitivity analysis was carried out to investigate the mechanism of soil-structure interaction system. The influences of the diameter b, the length L and the Young’s modulus E of DM piles on the lateral deflection of sheet pile walls were estimated. The parameter b is considered as one of the most important parameters to estimate the shielding effect. The overall investigation presented here provides a reference for the design and construction of combined sheet pile walls.

Key words: (max: 5)

Reference no.

Paper：

click to download