Hunan Provincial Communications Planning Survey and Design Institute

Changsha, China

Hunan Provincial Communications Planning Survey and Design Institute

Changsha, China
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Wu X.,Central South University | Wu X.,East China Jiaotong University | Wang M.,Central South University | Yang P.,Chinese Academy of Geological Sciences | And 2 more authors.
C e Ca | Year: 2017

According to the mechanical theory, this paper deduces the dynamic relationship between settlement and temporal variation in void ratio under large-area loading. The in-situ e-t curves and e-p curves of hydraulic fill in the process of drainage consolidation are inverted with the observed data of telescoping tube settlement gauge pre-buried in hydraulic fill. Based on the e-t and e-p curves of the drainage consolidation project of the Nanitang Pond in West Port Area, Shenzhen City, the following conclusions are drawn through the analysis: (1) In the process of preloading, the soil at the edge of the hydraulic fill is subjected to the uneven load and the stress of soil. Initially, the soil undergoes the perturbation-compression process; As the soil consolidates, the disturbance gradually attenuates and the soil structure weakens; (2) In the process of preloading, the nearer to the load center the soil is, the more uniform the load it bears, and the closer the e-p curve is to that of the lab soil tests. Therefore, the e-t and e-p curves of the observation point in the load center best represent the pore change characteristics of hydraulic fill; (3) The temporal and pressure-induced variation in the average void ratio of hydraulic fill at each observation point is approximately consistent with that of the observation points near the middle section of the layer. The central observation point is the most typical position to demonstrate the void ratio variation law of the middle section.


Shao X.-D.,Hunan University | Wu J.-J.,Hunan University | Wu J.-J.,Transportation Institute | Liu R.,Hunan Provincial Communications Planning Survey and Design Institute | Li Z.-H.,Hunan University
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2017

To avoid the problems of prestressed concrete girders, steel girders, steel-concrete composite bridge girders, which caused by inherent flaws of traditional material and the structure, propose an innovative lightweight steel-UHPC composite bridge girder appropriate for long span bridges. To verify the feasibility of steel-UHPC composite bridge girders used in cable stayed bridge, a finite element model was built to analyze the static performance and to calculate the stress range of fatigue and 9 full size stripe test specimens were designed to process static tests. The results show that tensile reinforcement ratios, steel bar diameter, diameter and length of linear fiber have little effect on first crack stress, while the first crack stress is significantly improved by steel fiber with hooked end. In positive bending moment, first crack stress of UHPC specimens with hooked fiber and linear fiber are respectively 19.4 MPa and 10.6 MPa, and the former is 83% higher than the latter. In negative bending moment, crack stresses of UHPC specimens with hooked fiber and linear fiber are respectively 13.8 MPa and 8.4 MPa, the former is 64% higher than the latter. In positive and negative bending moment test, the first crack stress of UHPC specimen with hooked fiber are respectively 1.45 and 1.66 times of tensile stress of Waffle deck panel in frequent combinations under serviceability limit state, the nominal tensile stress of UHPC specimen with hooked fiber are respectively 2.1 and 2.4 times of nominal tensile stresses of Waffle deck panel in fundamental combinations under ultimate limit state. Based on the S-N curves, prediction of fatigue life UHPC Waffle bridge deck is more than 200 million times. © 2017, Editorial Department of China Journal of Highway and Transport. All right reserved.


Zhang Y.,Nanjing Forestry University | Zhang Y.,Nagoya University | Bai S.,Hunan Provincial Communications Planning Survey and Design Institute | Zhang Q.,Changsha University of Science and Technology | And 2 more authors.
Construction and Building Materials | Year: 2015

This paper presented a experimental investigation into the advantage of RC member with shear strengthening using strain hardening cementitious composites (SHCC), focused on the crack pattern of SHCC strengthening layer and its obvious advantage for increasing the shear load carrying capacity of the strengthened RC member. Especially, the shear failed SHCC member was also adopted to reflect the reduced multiple fine crack distribution in SHCC strengthening layer. Moreover, the contributions of matrix and reinforcing fiber for shear load carrying capacity of SHCC strengthening layer were also calibrated respectively, and the shear load carrying capacity of SHCC strengthening layer was assumed as the sum of load carried by matrix and reinforcing fiber. This work provided experimental foundations for RC member with shear strengthening using SHCC. © 2015 Elsevier Ltd.


Zhang Y.,Nanjing Forestry University | Zhang Y.,Changsha University of Science and Technology | Bai S.,Hunan Provincial Communications Planning Survey and Design Institute | Yang Y.,Hunan Architecture Senior Technical School | Zhang X.,Central South University
Advances in Cement Research | Year: 2016

This paper presents a scheme of double-plane shear testing to investigate the shear transmission mechanism of strain-hardening cementitious composite (SHCC) after crack opening; the focus is on the shear stress transfer behaviour on the crack surface of the SHCC, contributed by both the contact effect of the matrix and the fibre bridging effect on the crack surface. The experimental results demonstrate that the transferred shear stress on the crack surface of the SHCC is contributed by both the contact effect of the matrix and the fibre bridging effect on the crack surface until peak shear stress, whereas after the separation of the crack surfaces, it is influenced solely by the fibre bridging effect. It is confirmed that the fibre bridging effect on the crack surface of SHCC has considerable influence in the shear fracture behaviour of SHCC. © 2016, ICE Publishing. All rights reserved.


Zhang Y.,Nanjing Southeast University | Zhang Y.,Nanjing Forestry University | Zhang Y.,Changsha University | Bai S.,Hunan Provincial Communications Planning Survey and Design Institute | Zhang Q.,Changsha University
Advances in Cement Research | Year: 2016

Strain-hardening cementitious composites (SHCCs) are an attractive construction material, due to their obvious advantage of large tensile strain capacity with pseudo strain-hardening, whereas this advantage is obviously reduced when SHCC is used for RC strengthening. This study investigated, experimentally and numerically, the localised behaviour of SHCCs for RC strengthening, with a focus on crack elongation performance and the ductility reduction of SHCC for RC strengthening. The numerical investigation was implemented using a proposed scheme that considers the localised behaviour of SHCCs for strengthening RC structures with cracks. The effectiveness of the numerical scheme was confirmed through a comparison of experimental and numerical results. © 2016, ICE Publishing. All rights reserved.


Huang X.-J.,Hunan Provincial Communications Planning Survey and Design Institute | Xu G.-L.,China Power Engineering Consulting Group Corporation | Peng L.,Hunan Provincial Communications Planning Survey and Design Institute
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2011

In order to put forward the failure surface and bearing capacity formula of combined reinforced gabion retaining wall composed of the reinforced gabion retaining wall and green reinforced gabion retaining wall, the field test monitoring on a new type of reinforced support structure in the actual slope protection engineering of the 12 th contract section of Xiangtan-Hengyang West Line Expressway in Hunan Province was carried out. The strain distribution laws of the tied-reinforcement in different layers were obtained. Based on the new broken line potential failure surface whose kickpoint of the simplified failure surface is H/3 (H is the height of the retaining wall), the calculated formula of bearing capacity of the top surface of retaining wall under two failure modes of the broken line failure surface was deduced. Using the limit equilibrium method, the formula of ultimate bearing capacity under the condition of tensile failure was thoroughly discussed and this formula unifies the bearing capacity formula of the 0.3H simplified failure surface and that of the Rankine failure surface. The new broken line failure surface was compared with four typical failure surfaces. Results show that it is safer to calculate the failure mode by the broken line simplified failure surface than by the highway specification and BS8006, and it is more economic than the railway specifications. The failure mode of the reinforced earth retaining wall with double-twisted hexagonal steel wire mesh is the tensile failure mode. Test results agree well with calculated results.


Ning Q.C.,Hohai University | Yang X.,Hohai University | Shi Y.,Hohai University | Li L.,Hunan Provincial Communications Planning Survey and Design Institute
Applied Mechanics and Materials | Year: 2014

In the design and construction code for gravity quay, the inner floor of multi-ribbed buttressed quays generally is divided into two parts to calculate. The part within 1.5 times the rib spacing is as a three fixed edges and one simply-supported slab. The restriction effect of the three fixed edges is the same. However, because of the difference in thickness between vertical plate and rib with the change in the vertical direction of the flow, the effect of them is not the same. It will lead to the result deviating. Sometimes, there will be a phenomenon that the maximum bending moment of inner floor is smaller than the mid-span moment. Finite element software ANSYS was used to make a 3D numerical simulation on a buttressed quay in this paper. Shortcomings in the current code are addressed by comparing the calculation results. This can provide references for engineering design. © (2014) Trans Tech Publications, Switzerland.


Huang X.,Central South University | Huang X.,Hunan Provincial Communications Planning Survey and Design Institute | Xu G.,Central South University | Xu G.,Henan Institute of Engineering | Chen R.,Maccaferri Enviro Technology Co.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

According to the first expressway reinforced gabion retaining structure in China(reinforced earth engineering of Daqing-Guangzhou expressway section of Lanxi interchange AK0+939.38-AK1+079.71, BK0+296.55-366.18 in Hubei Province), the stability of steep reinforced gabion slope is evaluated by using strength reduction finite element method(FEM) on the platform of the finite element software Phase2 V6.0. Based on the results of limit equilibrium slice method, the effect of selected element on the results of strength reduction method is analyzed. A new method to determine the internal failure surface of reinforced earth structure by using FEM to calculate tension distribution of reinforcements is proposed. The influences of cohesion, internal friction angle, tension, earthquake force, gravity density and vehicle load on factor of safety are discussed. Thus, it can be effectively used to guide the specific engineering designs.


Kang M.-H.,Beijing Jiaotong University | Xie H.-H.,Beijing Jiaotong University | Qi Y.,Hunan provincial communications planning survey and design institute
Applied Mechanics and Materials | Year: 2014

According to the input and out put of the marshalling station's operating work, the thesis establishes the evaluation index system of the operation efficiency of the marshalling station, then it use the fuzzy DEA model to evaluate the efficiency of marshalling station's operation. At last, the thesis chooses 3 kinds of marshalling stations to calculate their operation efficiency, then compare and analysis them to prove the reasonable method. © (2014) Trans Tech Publications, Switzerland.


Jiang Z.,Hunan Provincial Communications Planning Survey and Design Institute | Zhang P.,Hunan Provincial Communications Planning Survey and Design Institute | Yi Z.,Hunan Provincial Communications Planning Survey and Design Institute
Modern Tunnelling Technology | Year: 2013

It is a challenge for tunnel builders to keep a tunnel portal stable in a shallow buried section with bias pressure, which directly relates to construction and operation safety. In order to address this issue, a new composite arching structure with an umbrella and piles was adopted. This utilized the supporting property of the piles to reduce the cutting height of the side slope. It also improved the bearing capacity of the arching structure in order to prevent the portal and portal slope from subsiding and slipping, ensuring safe construction and operation of the tunnel in the section of bias pressure and fractured soft rock. This paper introduces the new composite arching structure and its construction method, and a mechanical analysis is carried out.

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