A model for predicting evaporation from fresh concrete surface during the plastic stage

Wei, Ya; Guo, Wei; Zhang, Qianqian

doi:10.1080/07373937.2019.1691012

Cited by 19 publications

(6 citation statements)

References 18 publications

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“…ese parameters could be obtained from onedimensional consolidation tests and triaxial shear tests. Stress-strain curves were very important in parameter analysis of the HS model [31][32][33], and typical stress-strain curves of triaxial shear tests are shown in Figure 1…”

Section: Hs Modelmentioning

confidence: 99%

Parameter Analysis on Hardening Soil Model of Soft Soil for Foundation Pits Based on Shear Rates in Shenzhen Bay, China

Zhang

et al. 2020

Advances in Materials Science and Engineering

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The hardening soil (HS) model is the most commonly used constitutive models of soft soil of foundation pits of PLAXIS software in numerical analysis, and its parameters are prerequisite for accurate calculation. In this paper, relevant parameters of the HS model in Shenzhen Bay in China were studied through one-dimensional consolidation tests and triaxial shear tests. Analytical methods of reference secant stiffness and failure ratio of soft soil were systematically studied, the influence of shear rates on reference secant stiffness and failure ratio of soft soil was analyzed, and the relationship between stiffness parameters and compressive modulus of soft soil was established. The results showed that reference secant stiffness and failure ratio of soft soil obtained by different analytical methods were quite different, and the errors of reference secant stiffness and failure ratio of soft soil obtained by stress-strain curves were the smallest and the stability was the best; at the same time, with increase of shear rates, the peak deviator stress and reference secant stiffness of soft soil increased, but failure ratio did not change much. The research results could provide a reference of parameter analysis of soft soil for the HS model in the numerical analysis and similar working conditions of foundation pits.

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Section: Hs Modelmentioning

confidence: 99%

Parameter Analysis on Hardening Soil Model of Soft Soil for Foundation Pits Based on Shear Rates in Shenzhen Bay, China

Zhang

et al. 2020

Advances in Materials Science and Engineering

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“…In practice, it provides satisfactory solutions to address various challenges and problems faced in construction activities. Fewer chemicals containing in this material well meets the sustainable and environmental demands, and sometimes, it can be partially or even entirely substituted for normal concrete [9,10]. e textural surface and microstructural cells make it widely used in the fields of the thermal insulation [11,12], sound absorbance [13,14], and fire resistance [15,16].…”

Section: Introductionmentioning

confidence: 99%

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Wang

et al. 2020

Advances in Materials Science and Engineering

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Foam concrete (FC) has the potential of being an alternative to ordinary concrete, as it reduces dead loads on the structure and foundation, contributes to energy conservation, and lowers the cost of production and labor cost during the construction and transportation. The paper reports a state-of-the-art review of foam concrete in terms of its components, manufacturing and material properties like drying shrinkage, compressive strength, stability and pore structure, etc. In view of the significance of the FC in engineering construction, it also includes a state-of-the-practice review of foam concrete in tunnel and underground engineering. Some shortcomings and technical limitations as well as emerging direction for performance enhancement of FC are also discussed. Current review concludes that the long-term performance and enhancement-associated properties need to be deeply investigated. This study can help alleviate consumer concerns and further encourage the wider application of FC in civil engineering.

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“…Underground pile foundations are dense in cities with crowded buildings. If the distance between pile foundation and shield is too close, tunneling may cause uneven settlement, structural deformation, and cracks in buildings [32][33][34][35][36][37]. To ensure the smooth advance of shield and the safety of adjacent pile foundations, it is necessary to take some protective measures [38][39][40][41][42][43][44][45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Protective Schemes for Shield Tunneling Adjacent to Pile Groups

Lai

et al. 2020

Advances in Civil Engineering

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Shield tunneling adjacent to pile groups is always an unavoidable problem in urban metro construction. A case was found in the project of Tianjin Metro Line 7, where a shield tunnel would be constructed near the existing pile groups of Shiyou Bridge. The whole shield tunnel is close to pile groups, and the minimum distance is only 0.8 m. Therefore, four kinds of protective schemes are proposed in this paper. It is vital to select an appropriate protective scheme to guarantee the safety during the tunnel construction. In this study, the main mechanical characteristic and physical parameters of site soil were obtained through laboratory tests. Besides, the three-dimensional finite element method was carried out to compare and analyze the effectiveness of the protective schemes in mitigating the effects of tunneling on adjacent pile groups. The results show that the deep-hole grouting scheme has better control effect on the lateral deformation and bending moment of piles, while the pile foundation underpinning scheme has better effectiveness on reducing the settlement of bridge structure and ground deformation. Finally, the deep-hole grouting reinforcement scheme will be adopted to ensure the shield passing through the pile groups smoothly.

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A model for predicting evaporation from fresh concrete surface during the plastic stage

Cited by 19 publications

References 18 publications

Parameter Analysis on Hardening Soil Model of Soft Soil for Foundation Pits Based on Shear Rates in Shenzhen Bay, China

Parameter Analysis on Hardening Soil Model of Soft Soil for Foundation Pits Based on Shear Rates in Shenzhen Bay, China

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

A Comparative Study of Protective Schemes for Shield Tunneling Adjacent to Pile Groups

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