Topic
Lateral earth pressure
About: Lateral earth pressure is a research topic. Over the lifetime, 5334 publications have been published within this topic receiving 62552 citations.
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TL;DR: In this paper, a set of two-dimensional plane-strain models of tunnels embedded in a single-layer dry soil are simulated to investigate the seismic response of circular tunnel considering the induced stress relief in the surrounding soil due to excavation.
21 citations
TL;DR: In this article, past experiences with tunnel-boring machines (TBMs) in Switzerland, and specifically on the aspects of soil conditioning during a passage through inhomogeneous soft soils, are discussed.
21 citations
05 Oct 2009
TL;DR: An effective soil pressure sensor for geotechnical applications based on Fibre Bragg Gratings is presented in this paper, which simultaneously measures total soil pressure and pore pressure, allowing the calculation of the effective stress of soil.
Abstract: An effective-soil-pressure sensor for geotechnical applications based on Fibre Bragg Gratings is presented. The sensor simultaneous measures total soil pressure and pore pressure, allowing the calculation of the effective stress of soil. Calibration of the sensor using pressurised air demonstrated a pressure sensitivity of 2.02x10 -3 ± 2.84x10 -5 nm/kPa and 1.87x10 -3 ± 6.88x10 -5 nm/kPa for the total and pore pressure respectively. This corresponds to a pressure resolution of 4.95x10 -1 kPa and 5.46x10 -1 kPa for total and pore pressure using a 1pm interrogation system. Measurements undertaken in two types of soil demonstrated dependence of the total pressure sensitivity on soil density/stiffness. Pore pressure measurements agreed well with the preliminary calibration.
21 citations
TL;DR: In this article, the nulling pressure required to maintain the membrane in an un-deflected state is in a 1:1 ratio with the applied soil pressure, and is independent of soil type, particle size and particle arrangement.
Abstract: Meaningful measurement of contact soil pressure at the interface of a structural boundary has been a cause of frustration to experimentalists in the field of soil mechanics and soil–structure interaction. The difficulty stems from the fact that most sensing systems involve compliance, which induces a local redistribution of pressure in the soil mass. In effect, the attempt to monitor soil pressure ruins the measurement. The paper uses a concept called the ‘null soil pressure system’, which is an active sensing system requiring that the sensing element be continuously and stringently maintained in an un-deflected state. Results illustrate that the nulling pressure required to maintain the membrane in the un-deflected state is in a 1:1 ratio with the applied soil pressure, and is independent of soil type, particle size and particle arrangement. No hysteresis is noted between loading and unloading, and additional loading cycles align with that of the first loading cycle. Relevance of the system within the re...
21 citations
TL;DR: In this paper, a general solution for the passive earth pressure containing two coefficients is presented based on the basic assumptions of Coulomb's theory and a pseudo-static method of analysis.
21 citations