scholarly journals Research on the reasonable pile spacing of micro pile composite soil nailing

2017 ◽  
Vol 81 ◽  
pp. 012157
Author(s):  
Jun yan Liu ◽  
Yan Liu ◽  
Xiang hua Song
Keyword(s):  
Soil Nailing ◽  
Pile Spacing ◽  
Composite Soil Nailing

Reliability Analysis of Stability of Foundation Pit Supported by Composite Soil Nailing

2010 ◽  
Vol 168-170 ◽  
pp. 2481-2487
Author(s):  
Yan Lin Zhao ◽  
Wei Guang An
Keyword(s):  
Global Stability ◽  
Reliability Index ◽  
Limit Equilibrium ◽  
Random Variables ◽  
Optimization Method ◽  
Soil Nailing ◽  
Sliding Surface ◽  
Foundation Pit ◽  
Disturbing Force ◽  
Composite Soil Nailing

Based on the limit equilibrium theory and the circular slip surface method, the state equation of limit equilibrium and the calculation model of the most dangerous sliding surface for inner global stability of foundation pit supported by the prestressed anchor composite soil nailing is established with the disturbing force method. And the searching and solving method of the most dangerous sliding surface is optimized with the SLP optimization method and the simplex optimization method. Then with the mechanical parameters of soil as random variables, the reliability index of inner global stability of foundation pit is calculated with the design checking point method. Finally, a practical project is used to analyze the sensitivity of the reliability index to the coefficients of variability of all random variables.

Numerical Analysis of Composite Soil Nailing Wall

2014 ◽  
Vol 1065-1069 ◽  
pp. 48-52
Author(s):  
Shu Long Zhang ◽  
Fen Ting Lu
Keyword(s):  
Three Dimensional ◽  
Ground Surface ◽  
Horizontal Displacement ◽  
Soil Nailing ◽  
Construction Process ◽  
Three Dimensional Model ◽  
Foundation Pit ◽  
Finite Element Software ◽  
Ground Surface Settlement ◽  
Composite Soil Nailing

Abstract. The horizontal displacement of soil in slope and the change law of ground surface settlement are dynamically analyzed by building three dimensional-model of foundation pit with the finite element software, ABAQUS, to simulate the construction process of excavation and support, to figure out the influence of micro pile and waterproof curtain on composite soil nailing wall. The study indicates that mechanical model of soil nailing, waterproof curtain, micro pile, pre-stressed anchor interacting with soil can better simulate the construction process of composite soil nailing wall support and have higher calculation accuracy. The calculation can provide a reference for the design and construction of composite soil nailing wall.

Simulation and Analysis on Supporting System of Composite Soil Nailing Technology in the Process of Digging

2012 ◽  
Vol 568 ◽  
pp. 66-70
Author(s):  
Bing Guo
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Stress Field ◽  
Displacement Field ◽  
Structural Features ◽  
Design Methods ◽  
Soil Nailing ◽  
Supporting System ◽  
The Real ◽  
Composite Soil Nailing

According to the typical engineering example and the structural features of the supporting system of composite soil nailing technology, the computing mode of deformation of composite soil nailing technology under force is established. Numerical analysis and supervision in the process of construction on composite soil nailing technology are made with the collocation of typical project example. The data of monitoring on the spot and numerical simulation show that the supporting system of composite soil nailing technology meets the requirement of real deformation under force and can simulate the real features of the stress field and displacement field in the process of construction. The design methods meet the requirement of accuracy, and the result presents important technical reference for design and construction of the supporting system of composite soil nailing technology.

FEM Analysis of Composite Soil-Nailing Considering Tensile Failure

2011 ◽  
Vol 105-107 ◽  
pp. 1488-1491 ◽  
Author(s):  
Zhi Gang Yan
Keyword(s):  
Finite Element ◽  
Tensile Failure ◽  
Structure Characteristic ◽  
Interface Element ◽  
Good Precision ◽  
Soil Nailing ◽  
Nonlinear Fem ◽  
Foundation Pit ◽  
Element Analysis ◽  
Composite Soil Nailing

Composite soil-nailing is a new technology developed from abroad in recent years, to be used in excavation of soil, slope stability. This paper studied the stress and deformation of composite soil nailing wall by nonlinear FEM. According to the structure characteristic, the finite element analysis for composite soil nailing construction process is carried out. Based on geotechnical elastic-plastic constitutive model, the adopted failure criterion was a composite Drucker-Prager criterion with tension cut-off. A kind of rotational Goodman interface element is employed to simulate the behavior of interface between the soil-mixed cement which forms the barrier of seepage flow along the boundary of foundation pit, and soil ground. Through the comparative analysis with on-site monitoring data, the finite element calculation results have good precision.

The Analys of Stability of Composite Soil Nail

2014 ◽  
Vol 580-583 ◽  
pp. 503-508 ◽  
Author(s):  
Yong Zeng
Keyword(s):  
New Technology ◽  
Practical Significance ◽  
Soil Nailing ◽  
Local Conditions ◽  
Soil Nail ◽  
Composite Soil Nailing ◽  
The Stability ◽  
The Right ◽  
Organic Combination ◽  
Stability Of Structure

Composite soil nailing technology is a new technology which developed on the basis of the soil nailing supporting technology. This new technology has a very important practical significance to the construction, for which the scale is larger and larger, the condition is more and more complex and the excavation of foundation is more and more deep. Composite soil nailing technique is mainly introduced in this paper by its main form of structure and the main principle, which draw a conclusion that different forms of the combination of support types have different effects on the stability of structure, by analyzing the support stability. This thesis shows that we should adjust measures to local conditions, choose the right organic combination. At the same time it also provides the basis for the practical application of engineering support.

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