Characteristics and Application of Micropiles in Slope Engineering

2018 ◽  
pp. 1504-1507
Author(s):  
Li Ma ◽  
Yifu Hu ◽  
Desheng Gu ◽  
Chong Jiang
Keyword(s):  
Slope Engineering

Book reviewsACTIVE TECTONICS AND ALLUVIAL RIVERS. SchummS. A., DumontJ. F. and HolbrookJ. M.. Cambridge University Press, 2002 (first published 2000). Paperback, 0 521 89058 6, 276 pp. £27·95.HIDDEN ASPECTS OF URBAN PLANNING. PaulTim, ChowFiona, and KjekstadOddvar (eds). Thomas Telford, 2002, 0 7277 3101 7, 85 pp. £30.ENCYCLOPEDIA OF ARCHITECTURAL AND ENGINEERING FEATS. LangmeadDonald and GarnautChristine, ABC-CLIO Inc., 2001, 1 57607 112 X, 388 pp.A SHORT COURSE IN FOUNDATION ENGINEERING, 2ndEDITION. SimonsNoel and MenziesBruce. Thomas Telford, 2000, 0 7277 2751 6, 244 pp. £45.ENGINEERING IN GLACIAL TILLS. TrenterN. A., Construction Industry Research and Information Association, Report C504, 1999, 0 86017 504 9, 259 pp.A SHORT COURSE IN SOIL AND ROCK SLOPE ENGINEERING. SimonsN., MenziesB. and MatthewsM.. Thomas Telford Limited, 2001. 0 7277 2871 7, 432 pp. £55·00.APPLICATIONS OF COMPUTATIONAL MECHANICS IN GEOTECHNICAL ENGINEERING. FernandesM. M., RibeiroL., SousaE., AzevedoR. F. and VargasE. A. (eds). A. A. Balkema, 2001. 90 5809 114 7.

2003 ◽  
Vol 156 (3) ◽  
pp. 167-169
Author(s):  
M. Barton ◽  
Andrew Bond ◽  
M. E. Andrews ◽  
J. McKinley
Keyword(s):  
Urban Planning ◽  
Construction Industry ◽  
Rock Slope ◽  
Foundation Engineering ◽  
Alluvial Rivers ◽  
Cambridge University ◽  
Slope Engineering ◽  
Industry Research ◽  
Short Course ◽  
Glacial Tills

scholarly journals Effects of vegetation lodging on overland runoff flow regime and resistance

2020 ◽  
Vol 20 (4) ◽  
pp. 1463-1473
Author(s):  
Jingzhou Zhang ◽  
Shengtang Zhang ◽  
Guibao Li ◽  
Ming Liu ◽  
Si Chen
Keyword(s):  
Flow Regime ◽  
Water Depth ◽  
Overland Flow ◽  
Resistance Coefficient ◽  
Soil Consolidation ◽  
Slope Engineering ◽  
Overland Runoff ◽  
Flow Propagation ◽  
Water Depths ◽  
Fluid Characteristics

Abstract Vegetation is a vital part of the natural environment. Variations in vegetation morphology produce changes in the mechanical and fluid characteristics of overland flow. Determining the effects of vegetation lodging on the overland runoff flow regime and resistance is a prerequisite for accurately simulating overland runoff and convergence, revealing the mechanism of overland flow propagation, and the design and management of vegetation protection, soil consolidation, and ecological slope engineering. To systematically study the effects of vegetation lodging on overland runoff, four planting vegetation lodging angles (α) and 10 test water depths were used to simulate experimental research with a 1.0% slope ratio. Experimental results show that the depth and state of vegetation inundation and the degree of lodging significantly influence the flow regime and resistance. Under the same water depth, higher values of α are associated with higher values of the flow velocity, Reynolds number, Froude number, and Darcy–Weisbach resistance coefficient (f), and lower values of the drag coefficient (CD). The overall result is enhanced turbulence in the flow field and weaker flow resistance. Numerical statistics and difference analysis indicate that, when the vegetation is non-submerged, a 10° increase in α produces a 9.30% decrease in f. In the submerged state, a 10° increase in α causes a 26.70% decrease in f. CD is greatly affected by the boundary water depth. Below some critical water depths, an increase of 10° in α reduces CD by 8.48%. Above the critical depth, a 10° increase in α decreases CD by 41.10%.

scholarly journals The Research on the Effect of Humidity on the Rheological Model of Swelling Rock

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Ming Ji ◽  
Yi-Dong Zhang
Keyword(s):  
High Stress ◽  
The State ◽  
Rock Stress ◽  
Rheological Analysis ◽  
Slope Engineering ◽  
Instantaneous Elasticity ◽  
After Effect ◽  
Swelling Rock ◽  
Viscoelastic Plasticity ◽  
Humidity Field

The research on the rheological mechanical behaviour of swelling rock in the condition of humidity field has a significant meaning for large rock engineering, such as deep coal mining, tunnelling, and slope engineering. Based on the Nishihara model, considering on the effect of humidity factor on swelling rock, the rheological elements are established and the effects of humidity on the damage of rock, the viscosity, and the elasticity are introduced. Moreover, the viscoelastic plasticity constitutive equations are established under the coupling of swelling rock stress and humidity. Afterward, considering the effects of humidity on the damage, elasticity, and viscosity, the creeping, unloading, and relaxation equations have been deduced. From this research, under the state of low stress σ3P<σS, the Nishihara model which considers the effect of humidity shows the properties of stable creeping. In addition, the unloading curves contain instantaneous elasticity, elastic after effect, and the viscosity flow induced by the humidity. However, under the state of high stress σ3P≥σS, it is an unstable creeping model. The unloading curves include instantaneous elasticity, elastic after effect, and the viscosity flow induced by the stress and the humidity. This model reflects the rheological properties of swelling rock comprehensively, and it can be used for rock rheological analysis.

Practice of Slip Surface Depth of Highway Slope Determined by Synthetic Survey Method

2013 ◽  
Vol 671-674 ◽  
pp. 337-342
Author(s):  
Cheng Liang Zhang ◽  
Chun Wang ◽  
Lei Liu
Keyword(s):  
Numerical Simulation ◽  
Slip Surface ◽  
Simulation Method ◽  
Survey Method ◽  
Pile Head ◽  
Central Section ◽  
Slope Engineering ◽  
Side Slope ◽  
Site Survey ◽  
Geological Features

The excavation roadbed was used in K29+450～900 sections of secondary highway from Gengma to Qingshui River. The design roadbed width was 12m, and after an excavation, the inclination of side slope was between 27 to 50 °. It is Nanting River below bed and the vertical distance is 20m between them. Under actions of external load, mountain slipping and river scouring, there appears an instable phenomenon in slope. The pile board wall had inclined which is located in the central section of one side of roadbed and close to K29+900 section after construction. The inclining range was larger and the inclination that was serious at pile head at the top reached about 2m. The research was focused on a side slope engineering in K29+450~900 sections and through site survey, the topography and geological features of slope were known and mastered. By drilling, high-density electric method and numerical simulation method, the depth and scope of slip surface were determined to provide a basis for governance programme of engineering reinforcement.

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