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In the article titled “Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks” [1], authors Cheng Liu and Weihua Lu were affiliated to “Nanjing Forestry University, Hunan Provincial Key Laboratory of Hydropower Development Key Technology, Nanjing, China,” which is incorrect. The correct affiliations for this author are as follows: Nanjing Forestry University, Nanjing 210037, China.
Jiajia Li; Yong Fang; Cheng Liu; Yongxing Zhang; Weihua Lu. Corrigendum to “Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks”. Advances in Civil Engineering 2021, 2021, 1 -1.
AMA StyleJiajia Li, Yong Fang, Cheng Liu, Yongxing Zhang, Weihua Lu. Corrigendum to “Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks”. Advances in Civil Engineering. 2021; 2021 ():1-1.
Chicago/Turabian StyleJiajia Li; Yong Fang; Cheng Liu; Yongxing Zhang; Weihua Lu. 2021. "Corrigendum to “Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks”." Advances in Civil Engineering 2021, no. : 1-1.
In piled and geosynthetic-reinforced (PGR) embankment, the arching behavior determines the overburden load on piles and subsoils. Placement of geosynthetic is effective in reducing the relative displacement between pile and subsoil. When the mobilized shear stress is less than the shear strength, partially developed arching will occur. Consequently, existing analytical methods, adopting the ultimate shear strength failure criterion, need to be improved. This study developed a simplified 2D analytical method, which is based on the developing arching effect, to evaluate the load redistribution of the PGR embankment. Then, the influences of embankment height and internal friction angle, subsoil depth, ratio of pile cap width to pile clear spacing (RPC) and geosynthetic tensile stiffness on the critical height ratio, stress concentration ratio, soil arching ratio, geosynthetic tension and axial strain were investigated. This study suggests that a RPC of 1:1.0 and a one-way of single-layer geosynthetic tensile stiffness of 2000 kN/m should be considered as the sensitivity thresholds for the PGR embankment.
Wei-Hua Lv; Tao Wu; Fan Gu; Lei Gao. Evaluation of soil arching effect due to partially mobilized shear stress in piled and geosynthetic-reinforced embankment. Journal of Central South University 2020, 27, 2094 -2112.
AMA StyleWei-Hua Lv, Tao Wu, Fan Gu, Lei Gao. Evaluation of soil arching effect due to partially mobilized shear stress in piled and geosynthetic-reinforced embankment. Journal of Central South University. 2020; 27 (7):2094-2112.
Chicago/Turabian StyleWei-Hua Lv; Tao Wu; Fan Gu; Lei Gao. 2020. "Evaluation of soil arching effect due to partially mobilized shear stress in piled and geosynthetic-reinforced embankment." Journal of Central South University 27, no. 7: 2094-2112.
The objective of this case study is to evaluate the development of soil arching in a widened embankment. In two test sections, earth pressures at different locations were monitored to reveal the load redistribution mechanism due to soil arching. Tensile forces in uniaxial plastic geogrids were measured to evaluate the performance of geosynthetic reinforcement in the widened embankment. The soil arching effect was quantified in terms of stress concentration ratio, soil arching ratio and geomembrane effect. Several existing methods were selected to compared with the measured results. The results of the field tests indicate that a two-dimensional plane soil arch with some eccentricity affects the fill load distribution on pile caps and subsoil between piles, and a realistic critical arch height of less than 2.0 m with a ratio of 1.4 times the pile clear spacing was identified. Although few existing methods could generate close results comparable to the measured values, most of the methods overestimated the load carried by the geosynthetic layer. The results also suggest that the foundation soil reaction underneath the geosynthetic layer should be taken into account in the load transfer mechanism of geosynthetic-reinforced and pile-supported widened highway embankments.
Weihua Lu; L. Miao; F. Wang; J. Zhang; Y. Zhang; H. Wang. A case study on geogrid-reinforced and pile-supported widened highway embankment. Geosynthetics International 2020, 27, 261 -274.
AMA StyleWeihua Lu, L. Miao, F. Wang, J. Zhang, Y. Zhang, H. Wang. A case study on geogrid-reinforced and pile-supported widened highway embankment. Geosynthetics International. 2020; 27 (3):261-274.
Chicago/Turabian StyleWeihua Lu; L. Miao; F. Wang; J. Zhang; Y. Zhang; H. Wang. 2020. "A case study on geogrid-reinforced and pile-supported widened highway embankment." Geosynthetics International 27, no. 3: 261-274.
In the past decades, the speed and scale of Chinese infrastructure construction have been enormous, and the resulting construction waste is also quite amazing, which has become a huge threat to environmental protection. If the pollution-free engineering utilization of the construction waste can be achieved at a low cost, it will undoubtedly be a great benefit for the country and the people. Therefore, a preliminary experimental study was conducted to investigate the strength characteristics of the cement treated and expanded polystyrene mixed lightweight. The waste soil (muddy clay and fine sand) as the main component of the lightweight mixture is taken from a foundation construction site of a Yangtze River Bridge which connects two eastern coastal cities, Zhenjiang and Yangzhou. With different mixture ratios and additives of the cement treated and expanded polystyrene mixed lightweight, a series of cubic samples were tested by the unconfined compressive strength test, and collections of standard cylinder samples prepared by hand were inspected by the conventional triaxial shear test. Then, a good exponential relationship between the uniaxial compressive strength and the cement mixing ration was founded, and a logarithmic relationship was captured between the compressive strength and curing time within a period of 28 days after the specimens were made. Samples made of different soil as raw materials have different strengths, but all of these specimens show a strain-hardening and stable behavior. Results show that the mechanical strength characteristics of the cement treated and expanded polystyrene mixed waste soil mainly depend on the proportions of lightweight mixture.
Weihua Lu; Jianyun Wang; Yongxing Zhang. Strength Characteristics of Cement Treated and Expanded Polystyrene Mixed Lightweight of Waste Soil from the Construction Site of a Yangtze River Bridge in China. Advances in Civil Engineering 2020, 2020, 1 -7.
AMA StyleWeihua Lu, Jianyun Wang, Yongxing Zhang. Strength Characteristics of Cement Treated and Expanded Polystyrene Mixed Lightweight of Waste Soil from the Construction Site of a Yangtze River Bridge in China. Advances in Civil Engineering. 2020; 2020 ():1-7.
Chicago/Turabian StyleWeihua Lu; Jianyun Wang; Yongxing Zhang. 2020. "Strength Characteristics of Cement Treated and Expanded Polystyrene Mixed Lightweight of Waste Soil from the Construction Site of a Yangtze River Bridge in China." Advances in Civil Engineering 2020, no. : 1-7.
This paper presents a systematical numerical investigation into the lining performance of a tunnel with cavities around surrounding rocks, focusing on the influences of cavity size and multicavity distribution. The study demonstrates that the cavities around surrounding rocks have much influence on tunnel stability and may induce damages in tunnel structures, in which cavity width has a more severe effect on the stress state of tunnel structures than cavity depth. Moreover, the numerical investigation also illustrates that the nonadjacent distribution of multicavities has more serious influence on tunnel structures than that from adjacent distribution of multicavities as well as that from a single cavity.
Jiajia Li; Yong Fang; Cheng Liu; Yongxing Zhang; Weihua Lu. Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks. Advances in Civil Engineering 2020, 2020, 1 -5.
AMA StyleJiajia Li, Yong Fang, Cheng Liu, Yongxing Zhang, Weihua Lu. Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks. Advances in Civil Engineering. 2020; 2020 ():1-5.
Chicago/Turabian StyleJiajia Li; Yong Fang; Cheng Liu; Yongxing Zhang; Weihua Lu. 2020. "Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks." Advances in Civil Engineering 2020, no. : 1-5.
Installing geosynthetic reinforcement at the bottom of the embankment will provide positive support for subgrade stability and settlement control, if there is a void or a weak foundation. In routine design work, the geomembrane effect must be well estimated and the tensile strain should be precisely predicted. Conventional analytical methods often adopt the limit state method to calculate the overlying load on the deflected geosynthetic. However, this assumption does not necessarily apply to all conditions, especially when the foundation soil can provide certain resistance. In this study, a semiempirical prediction method for evaluating the geomembrane effect of the basal reinforcement was proposed, and an iterative solution for calculating tensile strains of a deflected geosynthetic was deduced. In derivation, a virtual inclined slip surface and interaction between the geosynthetic and soil were quantitatively evaluated by coupling the arching effect and the geomembrane effect. Moreover, the development of shear stress along the slip surface can be considered, as well as different segments of the basal reinforcement. Then, the proposed method was validated by two large-scale experiments. Comparison of the results of this method with measurements and results of other analytical models confirmed that this analytical method can take good care of the varying process of the localized sinking, regarding the overlying loads on the geosynthetic and the subsequent tensile strains.
Weihua Lu; Yongxing Zhang; Weizheng Liu; Cheng Liu; Haibo Wang. Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking. Advances in Civil Engineering 2019, 2019, 1 -11.
AMA StyleWeihua Lu, Yongxing Zhang, Weizheng Liu, Cheng Liu, Haibo Wang. Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking. Advances in Civil Engineering. 2019; 2019 ():1-11.
Chicago/Turabian StyleWeihua Lu; Yongxing Zhang; Weizheng Liu; Cheng Liu; Haibo Wang. 2019. "Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking." Advances in Civil Engineering 2019, no. : 1-11.
To investigate the deformation and damping characteristics of cement treated and expanded polystyrene (EPS) beads mixed lightweight soils, this study conducted a series of triaxial shear tests cyclic loading for different confining pressures, cement contents, and soil categories. Through repeated loading and unloading cycles, axial accumulative strain, resilient modulus, and damping ratio versus axial total strain were analyzed and the mechanical behavior was revealed and interpreted. Results show that the resilient modulus increases with increasing confining pressure and cement content. A decreasing power function can be used to fit the relationship between the resilient modulus and the axial total strain. Although sandy lightweight specimens usually own higher resilient modulus than silty clay lightweight specimens do, the opposite was also found when the axial total strain is larger than 8% with 50 kPa confining pressure and 14% cement content. For damping ratio the EPS beads mixed lightweight soil yields a weak growth trend with increasing axial total strain and a small reduction with higher confining pressure and cement content. For more cementations, the damping ratio of the sandy lightweight soil is always smaller than the silty clay lightweight soil. Nonetheless, the differences of damping ratios that were obtained under all of the test conditions are not significant.
Weihua Lu; Linchang Miao; Junhui Zhang; Yongxing Zhang; Jing Li. Characteristics of Deformation and Damping of Cement Treated and Expanded Polystyrene Mixed Lightweight Subgrade Fill under Cyclic Load. Applied Sciences 2019, 9, 167 .
AMA StyleWeihua Lu, Linchang Miao, Junhui Zhang, Yongxing Zhang, Jing Li. Characteristics of Deformation and Damping of Cement Treated and Expanded Polystyrene Mixed Lightweight Subgrade Fill under Cyclic Load. Applied Sciences. 2019; 9 (1):167.
Chicago/Turabian StyleWeihua Lu; Linchang Miao; Junhui Zhang; Yongxing Zhang; Jing Li. 2019. "Characteristics of Deformation and Damping of Cement Treated and Expanded Polystyrene Mixed Lightweight Subgrade Fill under Cyclic Load." Applied Sciences 9, no. 1: 167.
The SEEP/W module of finite element software GEO-slope is used to analyze the effects of fracture depth, permeability coefficient ratio, fracture angle, and fracture number on the rainwater infiltration process. Moreover, the effect of fracture seepage anisotropy on slope stability is discussed combining with unsaturated seepage theory. The results show that the pore water pressure in the fracture increases rapidly with the rainfall until it changes from negative pressure to positive pressure. The greater the fracture depth is, the greater the pore water pressure in the fracture is, and the greater the infiltration depth at the time of rainfall stopping is. When the permeability coefficient is greater than the rainfall intensity, the permeability coefficient ratio has a great influence on the infiltration process of rainwater. The smaller the fracture angle is, the greater the maximum pore water pressure is in the fracture depth range, and the greater the depth of the positive pore water pressure is. However, with the increase of fracture angle, the infiltration depth decreases, and the range of the surface saturation area of slope increases obviously. With the increase of fracture density, the saturated positive pressure region is connected to each other in the slope. The influence range and the degree of the rainwater on the seepage field are larger and larger. There is a power relation between the saturation area and the fracture number, and also the concentration distribution of long fractures directly forms the large-connected saturated zone and raises groundwater. The range of the saturated zone and variation law of the pore water pressure under fracture seepage are obtained, which provide a reference for the parameter partition assignment of slope stability analysis under fracture seepage.
Ling Zeng; Jie Liu; Jun-Hui Zhang; Han-Bing Bian; Wei-Hua Lu. Effect of Colluvial Soil Slope Fracture’s Anisotropy Characteristics on Rainwater Infiltration Process. Advances in Civil Engineering 2018, 2018, 1 -11.
AMA StyleLing Zeng, Jie Liu, Jun-Hui Zhang, Han-Bing Bian, Wei-Hua Lu. Effect of Colluvial Soil Slope Fracture’s Anisotropy Characteristics on Rainwater Infiltration Process. Advances in Civil Engineering. 2018; 2018 ():1-11.
Chicago/Turabian StyleLing Zeng; Jie Liu; Jun-Hui Zhang; Han-Bing Bian; Wei-Hua Lu. 2018. "Effect of Colluvial Soil Slope Fracture’s Anisotropy Characteristics on Rainwater Infiltration Process." Advances in Civil Engineering 2018, no. : 1-11.
Strain hardening cementitious composite (SHCC) and fiber reinforced mortar (FRM) are considered as suitable for strengthening reinforced concrete (RC) structures, both of which belong to fiber reinforced cementitious composite (FRCC), whereas the distinctive strengthening effects of RC structure using SHCC and FRM have not been sufficiently understood until now. In this study, the comparative study of RC members with flexural strengthening using SHCC and FRM is implemented, focusing on the load carrying capacity and ductility improvement of the strengthened RC member. The result demonstrates that the load carrying capacity of the RC member, even strengthened with a plain SHCC layer, can be improved from that of the RC member with strengthening using a steel-reinforced FRM layer, and the ductility of the RC member with strengthening using a steel-reinforced SHCC layer is significantly improved from that of the RC member with strengthening using plain SHCC layer, because the multiple fine cracks in the SHCC layer are obviously increased even with a low-reinforcement-ratio steel bar adopted in the SHCC layer.
Yongxing Zhang; Cheng Liu; Weihua Lu; Haibo Xie; Hui Peng. Comparative Study of RC Members with Strengthening Using Strain Hardening Cementitious Composite and Fiber Reinforced Mortar. Journal of Testing and Evaluation 2018, 47, 1 .
AMA StyleYongxing Zhang, Cheng Liu, Weihua Lu, Haibo Xie, Hui Peng. Comparative Study of RC Members with Strengthening Using Strain Hardening Cementitious Composite and Fiber Reinforced Mortar. Journal of Testing and Evaluation. 2018; 47 (1):1.
Chicago/Turabian StyleYongxing Zhang; Cheng Liu; Weihua Lu; Haibo Xie; Hui Peng. 2018. "Comparative Study of RC Members with Strengthening Using Strain Hardening Cementitious Composite and Fiber Reinforced Mortar." Journal of Testing and Evaluation 47, no. 1: 1.
Weihua Lu; Linchang Miao. A simplified 2-D evaluation method of the arching effect for geosynthetic-reinforced and pile-supported embankments. Computers and Geotechnics 2015, 65, 97 -103.
AMA StyleWeihua Lu, Linchang Miao. A simplified 2-D evaluation method of the arching effect for geosynthetic-reinforced and pile-supported embankments. Computers and Geotechnics. 2015; 65 ():97-103.
Chicago/Turabian StyleWeihua Lu; Linchang Miao. 2015. "A simplified 2-D evaluation method of the arching effect for geosynthetic-reinforced and pile-supported embankments." Computers and Geotechnics 65, no. : 97-103.
A number of areas worldwide are suffering from the land subsidence, including the southern Yangtze River delta, the most developed area in China. Land subsidence is mainly induced by excessive groundwater pumping and has caused numerous problems, for example, flooding, structural cracking, and ground fissuring. Although several countermeasures have been adopted to mitigate the land subsidence problem in the southern Yangtze River delta, commonly using groundwater recharge, land subsidence is still developing even when groundwater levels are rising. The observation data of land subsidence in each stratum show that the deformation of the pumped aquifer is even greater than that in the adjacent aquitards when groundwater levels are recovering. Laboratory test results on the aquifer sand in Shanghai and Changzhou (two cities in the studied area, which have the most sufficient observation data about the land subsidence and groundwater level developing with time) proved that sand creep deformation is significant and is partially responsible for the land subsidence without groundwater level drawdown. Considering the difficulty and cost of collecting borehole samples from deep pumped aquifers to obtain the essential parameters for the existing sand creep calculation models, a simplified method was then proposed to calculate the sand creep deformation in the pumped aquifer. The relationship between the sand creep rate and the time can be recognized as linear using double logarithmic coordinates and the slope can be assumed to be one. In the proposed method, the laboratory test data are not necessary. Finally, case histories from Shanghai and Changzhou were used to verify the effectiveness of the proposed method.
Fei Wang; Linchang Miao; Weihua Lu. Sand creep as a factor in land subsidence during groundwater level recovery in the southern Yangtze River delta, China. Bulletin of Engineering Geology and the Environment 2013, 72, 273 -283.
AMA StyleFei Wang, Linchang Miao, Weihua Lu. Sand creep as a factor in land subsidence during groundwater level recovery in the southern Yangtze River delta, China. Bulletin of Engineering Geology and the Environment. 2013; 72 (3-4):273-283.
Chicago/Turabian StyleFei Wang; Linchang Miao; Weihua Lu. 2013. "Sand creep as a factor in land subsidence during groundwater level recovery in the southern Yangtze River delta, China." Bulletin of Engineering Geology and the Environment 72, no. 3-4: 273-283.