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 article, the authors compared the factors of safety obtained from static and pseudo-static analysis of gravity-type cellular cofferdams under seismic conditions, and suggested a methodology for conservatively performing design checks, using simplified procedures, and not as a replacement for a dynamic, state-of-stress response analysis.
15 citations
01 Jan 2005
TL;DR: In this paper, the features of different, purpose-built types of compaction probes are described and the most important factors governing the compaction process are presented, such as vibration frequency, an important parameter as it influences probe penetration.
Abstract: Planning and execution of deep vibratory compaction of natural and man-made fills requires recognition of fundamental soil aspects, such as the compactability of soils. Design is usually based on cone penetration tests and carried out with equipment specially developed for deep vibratory compaction, in particular, using variable frequency vibrators. The features of different, purpose-built types of compaction probes are described and the most important factors governing the compaction process are presented, such as vibration frequency — an important parameter as it influences probe penetration — and can enhance compaction by means of resonance effects during the compaction phase. Vibratory compaction generates lateral stresses, which result in a permanent increase of the horizontal earth pressure and overconsolidation. The practical importance of these effects is discussed.
15 citations
TL;DR: In this article, the deformation characteristics and ultimate bearing capacity of a retaining wall consisting of a fly ash-sand mixture backfill and geosynthetic reinforcements were investigated in physical model tests.
15 citations
TL;DR: Wang et al. as discussed by the authors investigated the influence of four shield operational parameters, namely, face pressure, tail grouting pressure, penetration rate, and pitching angle on the surface settlements due to twin tunneling.
15 citations
TL;DR: In this article, a number of field pullout tests of pressure grouted soil nails were conducted to estimate the pullout resistance of soil nails, and the effective bond lengths of field soil nail were accurately controlled by a new grouting packer system.
Abstract: Pullout resistance of a soil nail is a critical parameter in design and analysis for geotechnical engineers Due to the complexity of field conditions, the pullout behaviour of cement grouted soil nail in field is not well investigated In this work, a number of field pullout tests of pressure grouted soil nails were conducted to estimate the pullout resistance of soil nails The effective bond lengths of field soil nails were accurately controlled by a new grouting packer system Typical field test results and the related comparison with typical laboratory test results reveal that the apparent coefficient of friction (ACF) decreases with the increase of overburden soil pressure when grouting pressure is constant, but increases almost linearly with the increase of grouting pressure when overburden pressure (soil depth) is unchanged Water contents of soil samples at soil nail surfaces show obvious reductions compared with the results of soil samples from drillholes After soil nails were completely pulled out of the ground, surface conditions of the soil nails and surrounding soil were examined It is found that the water content values of the soil at the soil/nail interfaces decrease substantially compared with those of soil samples extracted from drillholes In addition, all soil nails expand significantly in the diametrical direction after being pulled out of ground, indicating that the pressurized cement grout compacts the soil and penetrates into soil voids, leading to a corresponding shift of failure surface into surrounding soil mass significantly
15 citations