Results 261 to 270 of about 4,830,776 (306)

Automated Measurement of Slurry Surface Settlement

Geotechnical Testing Journal, 1990
Abstract An automated float method for measuring slurry surface settlement is described. The system consists of a Perspex float which is denser than water but lighter than the slurry into which it penetrates slightly and floats on the slurry/water interface. Settlement of this float is then automatically tracked using an LVDT. Comparison
Tan, Siew-Ann, Tan, Thiam-Soon, Kee, Ming Liang   +2 more
openaire   +1 more source

An Investigation Into the Effects of an Annular Gap on Surface Settlement

Soil Mechanics and Foundation Engineering, 2021
Ground displacement is an inevitable problem in the excavation of tunnels and underground spaces near the surface. The importance of surface settlement increases with a reduction of the depth of tunnelling. In urban areas, when settlements exceed the allowed value, they can damage surface and subsurface structures.
Ozcelik, Y., Sharghi, M., Balani, A., Chakeri, H.   +3 more
openaire   +2 more sources

Reliability analysis of shallow tunnel with surface settlement

Geomechanics and Engineering, 2017
Based on the reliability theory and limit analysis method, the roof stability of a shallow tunnel is investigated under the condition of surface settlement. Nonlinear Hoek-Brown failure criterion is adopted in the present analysis. With the consideration of surface settlement, the internal energy and external work are calculated.
X.L. Yang, W.T. Li
openaire   +1 more source

Surface Settlement Due to Shear Stresses at Depth

Journal of Geotechnical Engineering, 1994
Mindlin's solution for surface vertical displacement due to a horizontal force at depth is first examined and then integrated for shear stresses acting on a long rectangular reinforcing strip. Four types (constant, linear decrease, power‐law decrease, and triangular) of shear stress variations, are considered.
Madhira R. Madhav, N. Kumar Pitchumani
openaire   +1 more source

Larval Settlement and Surfaces: Implications in Development of Antifouling Strategies

2008
Marine biofouling is a natural process that imposes technical operational problems and economic losses on marine-related activities. Marine biofouling communities are complex, diverse, highly dynamic ecosystems consisting of a range of organisms. Larvae of these organisms spend a part of their lives in the planktonic stage before settling on a surface.
P. Sriyutha Murthy, V. P. Venugopalan, K.V.K. Nair, T. Subramoniam   +3 more
openaire   +1 more source

Surface settlements due to shield tunnelling in Rome

Bulletin of the International Association of Engineering Geology, 1980
Extensive field observations have been made of ground settlements associated with driving twin tunnels through a variety of soil types. Analysis of data shows that values of ground settlements are directly related to the size and depth of tunnels, to the soil characteristics, and to timing of grouting operations behind the lining.
M. Ottaviani, G. Cappellari
openaire   +1 more source

Characteristics of ground surface settlement during excavation

Canadian Geotechnical Journal, 1993
The objective of this paper is to study the characteristics of ground surface settlement during excavation. Ten excavation cases in Taipei with good-quality construction and field observation data are selected to study the characteristics of excavation behavior.
Chang-Yu Ou, Pio-Go Hsieh, Dar-Chang Chiou   +2 more
openaire   +1 more source

Surface Settlement Adjacent to Braced Open Cuts

Journal of the Soil Mechanics and Foundations Division, 1966
A semigraphical procedure is developed to predict the settlement gradient of the surface adjacent to a braced open cut. A review of existing methods for defining the zone of influence for underpinning discloses that present methods are not verified by field observations. The theoretical background used in developing the solution is presented.
openaire   +1 more source

Analysis and Control the Surface Settlement of Tunnel Excavation

Applied Mechanics and Materials, 2013
Combined with the station of Maritime University ~ High-tech Zone tunnel project, this paper analyzes each section of the measured data on the spot to determine the surface subsidence. Research results show that the soil geological conditions of different effects on the subsidence are obvious, but shapes which formed by the settling tank are similar ...
Jing Jing Li, Hui Ren Bai, Jin Kui Li
openaire   +1 more source

Ground surface settlements of sands densified with explosives

Proceedings of the Institution of Civil Engineers - Ground Improvement, 2016
Blast densification has long been used to densify loose, saturated sand deposits. Although it is an economically feasible approach to densify large areas, it is not widely used in engineering practice as the design is mostly empirical and some verification tests, such as the cone penetration test, standard penetration test and shear wave velocity test,
Carlos A. Vega-Posada, Richard J. Finno
openaire   +1 more source