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.

Braced excavations: temperature, elastic modulus, and strut loads

Abstract: Relationships between strut loads, earth pressures, temperatures, and the measurements provided by strain gauges are presented in this paper. A braced excavation up to 20-m deep, 9–20 m wide, and > 650-m long constructed in competent glacially derived sand, silt, and clay soils (including glacial till) provided a significant amount of data for analysis. The excavation was supported by soldier piles and lagging with pipe struts and was covered with decking during construction. A direct correlation between incremental changes in strut load and temperature was observed during the course of the project. The few existing relationships between strut load and temperature were reexamined and were found to produce back-calculated elastic modulus values that were either without comparison or inconsistent with data from field tests and published sources. The relationships derived as a result of this work are supported by limited case-history data from other published sources and are consistent with practical application of elastic deformation concepts and published soil modulus values.

Field Lateral Load Tests on Slope-Stabilization Grouted Pipe Pile Groups

Abstract: A new type of slope-stabilization structure has been developed in recent years, which uses a grouted pipe pile group and pile-head connection beams to form a pile-soil frame structure. In this research, field lateral loading tests on one 2×5 and two 3×5 grouted steel-pipe pile groups were carried out at a highway slope-stabilization site. The tests simulated the performance of slope-stabilization pile groups subject to lateral soil movements caused by surcharge fill loading behind the pile groups. Through the measurements of pile and soil displacements, pile strains, and earth pressures, the loading behavior of these grouted steel-pipe pile groups was studied, taking the number of pile rows, row spacing, and pile spacing as variables. At the same pile spacing and row spacing, the maximum displacement of a 3×5 pile group was only 35–55% of that of the 2×5 pile group. The deformations of the soil between the piles were approximately the same as those of the piles. The earth pressure was the largest ...

A Refined Formula for the Allowable Soil Pressure Using Shear Wave Velocities

Abstract: Based on a variety of case histories of site investigations, including extensive bore hole data, laboratory testing and geophysical prospecting at more than 550 construction sites, an empirical formulation is proposed for the rapid de- termination of allowable bearing pressure of shallow foundations in soils and rocks. The proposed expression corroborates consistently with the results of the classical theory and is proven to be rapid, and reliable. Plate load tests have been also carried out at three different sites, in order to further confirm the validity of the proposed method. It consists of only two soil parameters, namely, the in situ measured shear wave velocity and the unit weight. The unit weight may be also determined with sufficient accuracy, by means of other empirical expressions proposed, using P or S - wave velocities. It is indicated that once the shear and P-wave velocities are measured in situ by an appropriate geophysical survey, the allowable bearing pressure as well as the coefficient of subgrade reaction and many other elasticity parameters may be determined rapidly and reliably.