Zhejiang Province Architectural Design and Research Institute

Hangzhou, China

Zhejiang Province Architectural Design and Research Institute

Hangzhou, China
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Wu W.,Wuhan University | Huang S.,Wuhan University | Ma S.,Zhejiang Province Architectural Design and Research Institute | Xu X.,Wuhan University
ICPTT 2014 - Proceedings of the 2014 International Conference on Pipelines and Trenchless Technology | Year: 2014

Allowing for the shortcomings of the existing dynamic interaction models of pile and pile end soil, this paper presented a new model to simulate the dynamic interaction of pile and pile end soil, namely, fictitious soil pile model. At first, finite soil layers below pile end are modeled as fictitious soil pile whose cross-section area is the same as that of the pile. Meanwhile, the surrounding soil layers of pile are modeled by using plane strain model. Then, the semi-analytical solution of longitudinal dynamic response at the pile head in time domain is derived by means of Laplace transform and impedance function transfer method. Based on this solution, a parametric study is conducted to study the influence of parameters of soil below pile end on the longitudinal dynamic response at the pile head. © 2014 American Society of Civil Engineers.


Liu X.-W.,Zhejiang Province Architectural Design and Research Institute | Shi B.-H.,Hangzhou Xiaoshan District Construction Management Division | Yuan J.,Zhejiang Province Architectural Design and Research Institute | Li B.-H.,Zhejiang Province Architectural Design and Research Institute | Cao G.-Q.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

A large lake located in Hangzhou is filled with marine got from the bottom of Qiantangjiang river. The deep soft clay make it difficult for the following backfill and foundation pile construction. A soft clay treatment method based on preloading drainage consolidation is proposed in this paper according to several foundation treatment schemes comparison and field test, and the key construction process is also introduced. Based on the field observation data, the deformation behavior, pore-pressure and shear strength of soil during the process of construction are analyzed in detail. The result shows that the drainage system directly relates to the efficiency of foundation treatment, the heaped load arrangement in time and space determines success or failure of the project, and all the work reaches the intended target.


Li Y.,Zhejiang Province Architectural Design and Research Institute | Chen J.-Y.,Hangzhou New East Town Construction and Investment Co. | Huang X.-G.,Hangzhou New East Town Construction and Investment Co. | Yuan J.,Zhejiang Province Architectural Design and Research Institute | Liu X.-W.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013

The foundation pit of West Square of Hangzhou East Railway Station is the first project that large-scale unloading is conducted on the top of shield subway tunnels. A 3D FEM model is used to simulate the whole excavation course of the foundation pit, and the effect of various adopted construction measures on underlying shield subway tunnel is studied. The construction measures include step excavation, reinforced cushion and reinforcement of soils surrounding the tunnel. Some conclusions are drawn through the comparison between the calculated and the monitoring results: (1) the heave occupieds a dominant position in the tunnel deformation caused by top excavation, and proper design and construction can lead to an desired tunnel deformation; (2) better results will be got by combining excavation by layers and by blocks with building reinforced cushion simultaneously; (3) the reinforcement around tunnels acts as a protective screen of tunnels in ground displacement field, so the tunnel heave decreases substantially.


Yuan J.,Zhejiang Province Architectural Design and Research Institute | Chen J.-Y.,Hangzhou New East town Construction and Investment Co. | Liu X.-W.,Zhejiang Province Architectural Design and Research Institute | He X.-L.,Hangzhou New East town Construction and Investment Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

Multiple adjacent large and deep excavations are closely related and largely affected each other by centralized construction. Through the determination of reasonable construction sequence and the design principle of self retaining structure, A series of interface retaining structure control technologies are obtained by setting up multiple independent closed curtains. The construction is successful with the deformation of metro tunnel in the range of allowable values.


Wang X.-D.,Nanjing University of Technology | Xu J.,Nanjing University of Technology | Zhu H.-B.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

Based on the semi-analytical numerical analysis principle and the Galerkin's method, a trial function, which satisfies groundwater non-flow boundary conditions, is established to describe groundwater drawdown. Finite layer equations for groundwater flows in anisotropic layered confined aquifers are further proposed under non-flow boundary conditions, and a finite layer method is successfully developed for the groundwater flows. Analytical solution and finite difference solution of numerical examples are presented to verify the finite layer method. The applicability of the finite layer method is discussed for solving the groundwater flows in anisotropic layered aquifers, multi-layer aquifers and leaky confined aquifers. The research shows that semi-analytical numerical method is especially suitable for the analysis of groundwater flows in layered confined aquifers and has obvious advantages in the calculation efficiency compared with the traditional numerical methods.


Yuan J.,Zhejiang Province Architectural Design and Research Institute | Liu X.-W.,Zhejiang Province Architectural Design and Research Institute | Chen W.-L.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

The researches on the settlement of soil, deformation of retaining wall and environmental impact of deep excavation of Metro Control Center during construction, which is 6~8 m away from the metro tunnel and station, are presented. A series of methods are taken, such as dewatering, water proofing and double-row retaining wall to ensure the safety of the metro tunnel and station. The construction is succeeded with the deformation of metro tunnel in the range of allowable values.


Li B.-H.,Zhejiang Province Architectural Design and Research Institute | Liu X.-W.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

Hangzhou Jinlu Building project has a deep foundation pit in deep soft soils. Because of the poor geological conditions and complex environment of the pit, the supporting structures of piles in row with double reinforced concrete inner braces and ground reinforcement in passive zone are applied. However, the horizontal deformation of the support system exceeds the warming values owing to the special circumstances of the pit. The process of deformation is presented, and the reasons for the deformation are analyzed according to the monitoring results. Some useful conclusions are drawn.


Li Y.,Zhejiang Province Architectural Design and Research Institute | Liu X.-W.,Zhejiang Province Architectural Design and Research Institute | Cao G.-Q.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

Inrushing may lead to a high construction cost or even failure of excavation, while local deep pit, including elevator shaft and collecting well, is the most dangerous place of inrushing in the deep excavation. Based on the assumption of general shear failure of soils between the pit bottom and the confined aquifer top, an equation is proposed to evaluate the inrushing stability of local deep pit, which can consider the effect of soil shear strength, plan size and reinforcement. Applicable conditions of the formula and the method to calculate the shear strength are also provided. Finally, the data of deep excavations along the Qiantang River in Hangzhou are analyzed. The following conclusions are drawn: (1) the shear strength has an increase of more than 30% in inrushing stability and an extra increase of about 20% in stability is achieved by reinforcement of pit bottom soils; (2) the possibility of inrushing decreases with the increase of the height of pit bottom soils and the ratio of pit circumference to pit area; (3) it can prevent inrushing by dividing a large excavation into lots of small ones.


Li B.-H.,Zhejiang Province Architectural Design and Research Institute | Liu X.-W.,Zhejiang Province Architectural Design and Research Institute | Cao G.-Q.,Zhejiang Province Architectural Design and Research Institute
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

The first-stage MTR property project of Longxiang station of Hangzhou Metro Line 1 is located in the downtown of Hangzhou, which is close to the Longxiang station under construction at its east and to Huansha Canal at its west. The environment of the project is very complex. At the same time, the original site of the MTR property project is the Union Building's basement whose piles and retaining piles intersect with the three-storey basement of the project. Because of the particular position of deep soft soils and a large number of nearby facilities to be secured, it is important to optimize bracing projects for deep excavation of the project, especially in the case that the original basement can not be cleaned. The problem due to the existing basement is solved successfully by grooving the floor to set up the guide wall of diaphragm wall and dismantling the existing basement gradually to coordinate the formation of the supporting systems. The excavation is carried out smoothly, and the safety of the surroundings is ensured.


Ma S.-J.,Zhejiang University | Ma S.-J.,Zhejiang Province Architectural Design and Research Institute | Han T.-C.,Zhejiang University | Huang F.-M.,Zhejiang University | Wang K.-H.,Zhejiang University
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | Year: 2012

An advanced computation approach was presented to study the seismic active earth pressure on retaining wall with two-layer cohesive backfill. Based on the assumption of Mononobe-Okabe theory, the expression for the total seismic active earth pressure was derived. The cohesion force on the sliding plane and the adhesive force on the interface of backfill and retaining wall were considered in the analysis. The developed formula can be degenerated to Mononobe-Okabe earth pressure expression for the case of homogeneous cohesiveless soil backfill. The parametric study shows that the seismic active earth pressure increases with the increase of horizontal seismic acceleration coefficient, while it decreases with the increase of vertical seismic acceleration coefficient. Both horizontal and vertical seismic inertia forces have significant effect on the value of seismic active force. Compared with the results of other methods for calculating the seismic earth pressure, the value of seismic active force obtained from the present study is lower than that of the layer method for the same parameters.

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