Settlement due to Diaphragm Wall Construction in Reclaimed Land in Hong Kong

Thorley, C. B. B.; Forth, R. A.

doi:10.1061/(asce)1090-0241(2002)128:6(473)

Cited by 20 publications

(3 citation statements)

References 2 publications

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“…Field observations show that the slurry trenching induced ground settlement could account for 40 to 50% of the total ground settlement during the process of deep excavation supported by CDWs 2 – 4 . Clough and O’ Rourke 5 early summarized the ground surface settlement data from five case projects of CDW installation and found that during slurry trenching, the average and maximum ground settlement adjacent to the wall reach about 0.08% and 0.15% of wall depth, respectively.…”

Section: Introductionmentioning

confidence: 99%

Mindlin solution on ground deformation caused by the trench excavation during installation of concrete diaphragm wall panels

Gui-chun

2021

Sci Rep

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Concrete diaphragm walls (CDWs) are widely used as support of deep excavation in soft ground in urban areas. Ground deformation occurs during the excavation of trenches for the installation of the CDW panels due to ground stress release. This paper investigates the ground deformation during slurry trenching using Mindlin solution. The pressure of slurry used to protect the trench stability during excavation is simulated as a triangularly distributed load on the trench walls, the soil stress state is solved using Mindlin solution, and the horizontal and vertical ground displacement are obtained through integral transformation of ground strain. The rationality of the solution is verified through comparison between the analytical solution and field measurement. Sensitivity analyses are performed on soil elastic modulus, Poisson's ratio, trench excavation depth and panel length. Simplified formulation is proposed for the prediction of horizontal ground deformation. The impact of excavation stages and adjacent panels on the ground deformation is explored. The study finds that the Mindlin solution is able to provide an approximate solution on the ground deformation during slurry trenching, and the simplified formulation can be used to provide a fast estimate of the horizontal ground movement in engineering practice.

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Section: Introductionmentioning

confidence: 99%

Mindlin solution on ground deformation caused by the trench excavation during installation of concrete diaphragm wall panels

Gui-chun

2021

Sci Rep

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“…There have been recent growing interests in constructing an industrial complex and a housing site in a coastal reclaimed land (Mimura et al 1990; Thorley and Forth 2002;Zeitoun et al 2008;Tokimatsu et al 2012;Zhou, Shang, and Xiao 2014). A utility pipe for supply of electricity, gas, and water was buried and installed in the site, and embankments were then filled to be used for urban infrastructure in a reclaimed marine area (Christensen 1967;Brachman, Moore, and Rowe 2001;Song et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Piled embankment to prevent damage to pipe buried in soft grounds undergoing lateral flow

Hong

2016

Marine Georesources & Geotechnology

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Lateral flow of soft ground occurs when embankment filling is performed on reclaimed land of foreshore. If a utility pipe is buried in soft ground undergoing the lateral flow, severe damage to the pipe can be caused. A pile-supported embankment has been used to support embankment to minimize lateral flow of the soft soil by transferring the embankment loads through the piles to the firm layer. To prevent damage to the buried pipe subjected to lateral force of the soft ground, full-scale field experiments on the piled embankment were conducted for 70 days. The test results show that the piled embankment effectively reduces both the settlements of the ground and the lateral displacements of the buried pipe. Although additional load was not imposed on the embankment after finishing embankment filling, the settlement and lateral displacement of soft ground simultaneously increased. This coupling behavior was observed at the toe of the embankment and the back of the buried pipe. To quantitatively evaluate the coupling effect of the movement, the coupling area (CA) was coined and analyzed with the efficiency of load transfer. The efficiency evaluated by the CA was in good agreement with the efficiency by the soil arching mechanism.

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“…However, the diaphragm wall panel installation process inevitably changes stress conditions within the ground and can also induce significant ground movements (Poh and Wong 1998, Dong and Whittle 2022, Dong 2023b). These changes can become significant in cases where the construction is close to adjacent facilities (Chan andYap 1992, Thorley andForth 2002), and will also affect the ground response and structure performance during subsequent excavation process.…”

Section: Introductionmentioning

confidence: 99%