Addition of alkaline solutions and fibers for the reinforcement of kaolinite-containing granite residual soil

Yuan, Bingxiang; Chen, Weijie; Zhao, Junhua; Li, Lijuan; Liu, Feng; Guo, Yong; Zhang, Baifa

doi:10.1016/j.clay.2022.106644

Cited by 57 publications

(23 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen from Figure 6, the numerical results of the Duncan-Chang model based on conventional triaxial test parameters are quite different from in situ loading test results and numerical results of the variable modulus constitutive model. The main reason may be that the granite residual soil has strong structural characteristics [18][19][20][21], and the effects of stress release and disturbance caused by sampling…”

Section: Verification Of the Variable Modulus Constitutivementioning

confidence: 99%

Study on Calculation Method of Foundation Nonlinear Settlement Based on In Situ Loading Test

Wen

Yang

Zhong³

2023

Geofluids

View full text Add to dashboard Cite

In this paper, a nonlinear deformation modulus method is proposed for foundation settlement calculation. In the proposed method, the nonlinear deformation modulus under different stress levels is obtained from the load-settlement curve of in situ loading test, which are then applied to the layerwise summation method for calculating foundation settlement. On this basis and referring to the Duncan-Chang model, a variable modulus constitutive model suitable for numerical calculation of foundation settlement is further proposed. The required parameters of this model are the same as those of the nonlinear deformation modulus method and can be determined by the in situ loading test. The validity of the proposed calculation methods of foundation settlement is verified by the in situ loading tests under different plate sizes. The results illustrate that both the nonlinear deformation modulus method and the variable modulus constitutive model compare quite well with the test results, and the deduced results can better reflect the nonlinearity of foundation settlement.

show abstract

Section: Verification Of the Variable Modulus Constitutivementioning

confidence: 99%

Study on Calculation Method of Foundation Nonlinear Settlement Based on In Situ Loading Test

Wen

Yang

Zhong³

2023

Geofluids

View full text Add to dashboard Cite

show abstract

“…Te alternate solution is to determine the variation rules of the modulus with grain size so as to extrapolate the experimental modulus to the prototype modulus. Currently, the extrapolation method is more used on the shear strength extrapolation [10,12,[15][16][17][18][19][20][21][22], and the studies on rockfll modulus are not the same as the studies on shear strength.…”

Section: Introductionmentioning

confidence: 99%

Extrapolation-Based Scale Effect Model for Granular Heap Modulus

Wei

2023

Advances in Civil Engineering

View full text Add to dashboard Cite

The numerical analysis was used to predict the rockfill dam displacement, and the model parameters were calibrated using the triaxial experiments on scale-down rockfill samples. Due to the scale effect of rockfill material, the displacements were usually underestimated in the design phase. This study focused on the scale effect of rockfill material and an extrapolation model was proposed to extrapolate the prototype modulus from the laboratory modulus. By conducting confined compression experiments, the size effect was investigated using ball heaps. Based on the experimental findings, considering a granular heap as a cumulative particle structure, the structural mechanics approach was introduced to establish the size effect model. Then, the boundary constrain effect model was speculated using the elastic mechanics analysis. By conducting the confined experiments on ball heaps, the modulus variation with particle breakage was investigated and the breakage effect model was established consequently. Finally, via combining the effects from the size, boundary constrain, and particle breakage, a scale effect model was established for extrapolating prototype modulus from the laboratory modulus. The proposed model was evaluated through numerical analysis of an actual dam. The experimental results revealed that the compressive modulus decreased as the initial void ratio increased; under the same initial void ratio, the compressive modulus decreased as the ratio of the specimen width to particle size increased; the compressive modulus decreased as the particle breakage increased. The numerical analysis results showed that prediction accuracy for rockfill dam displacement was improved by 8%–10%. The proposed model represents a new approach for investigating the scale effect of rockfill material, which could be adopted by engineers to improve the prediction of rockfill dam displacement.

show abstract

“…Ng et al [9]studied the performance of an existing piled raft and pile group due to adjacent multipropped excavation. Yuan et al [10,11] analyzed the infuence of groundwater depth on pile-soil mechanical properties and fractal characteristics under cyclic loading. For the deep foundation pit engineering using the reverse construction method or horizontal support, when the antisurge stability check is carried out, if the pressure balance method in the specifcation is adopted [12], it is obviously conservative and prone to the situation that the check calculation result does not match the actual project.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Influences of Engineering Piles for Anti-Inrush of Deep Excavation under Confined Water

Zehai

Jin

Zhang

et al. 2023

Advances in Civil Engineering

View full text Add to dashboard Cite

Aiming at the problem of anti-inrush of confined water in foundation pits considering the influence of engineering piles, a three-dimensional numerical analysis model of anti-inrush stability of deep foundation pits is established by using the finite element software ABAQUS, and the inrush failure mechanism and deformation behavior of the foundation pit bottom under the action of different confined water levels are analyzed. The effects of different pile lengths, pile spacing, waterproof layer thickness, and soil strength are studied, respectively, and the laws of pile foundation stress and soil deformation under the action of confined water are revealed. The results show that the existence of engineering piles has an obvious inhibitory effect on the stability of foundation pit confined water against inrush. By introducing the comprehensive correction coefficient of pile side friction, an analysis method for the anti-inrush stability of foundation pits considering the influence of engineering piles is proposed.

show abstract

Addition of alkaline solutions and fibers for the reinforcement of kaolinite-containing granite residual soil

Cited by 57 publications

References 63 publications

Study on Calculation Method of Foundation Nonlinear Settlement Based on In Situ Loading Test

Study on Calculation Method of Foundation Nonlinear Settlement Based on In Situ Loading Test

Extrapolation-Based Scale Effect Model for Granular Heap Modulus

Numerical Analysis of Influences of Engineering Piles for Anti-Inrush of Deep Excavation under Confined Water

Contact Info

Product

Resources

About