China Railway 19th Bureau Group Co.

Liaoyang, China

China Railway 19th Bureau Group Co.

Liaoyang, China
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Li P.,Beijing Jiaotong University | Zhang D.,Beijing Jiaotong University | Zhao Y.,Beijing Jiaotong University | Zhou Y.,Beijing Jiaotong University | And 3 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

Taking Humaling tunnel in Lanzhou-Chongqing railway as project background, contact pressure between the primary lining and secondary lining of large-section loess tunnel was acquired by means of in-situ monitoring; development law over time and spatial distribution along the tunnel ring of the contact pressure were discussed. Loads on the secondary lining were calculated according to code for design on tunnel of railway. Internal force of the secondary lining under calculation loads and monitoring loads was solved individually by load-structure model; and a comparative analysis was conducted. The study method and conclusions can provide references to analyze the mechanical characters of lining in soft ground and establish a scientific and reasonable design method of tunnel.


Yang G.-L.,Central South University | Qiu M.-M.,Central South University | He X.,Central South University | He X.,China Railway 19th Bureau Group Co. | Shen Q.,Central South University
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2016

The defect of cutting subgrade in expansive soil is a key technical problem of railway engineering to be solved urgently. According to the actual conditions of the new Yun-Gui line of a high-speed railway project in expansive soil areas, the model tests for cutting subgrade in expansive soil were conducted to study the dynamic performance and waterproof effect of a new water-proof structure layer under three types extreme service conditions (dry, raining, and underground water rising), and they were analyzed combining with the field measured data. The analysis results showed that the influences of the service environment on the dynamic characteristics of the new subgrade structure are significant; the dynamic stress, velocity and acceleration of the subgrade increase at different levels due to raining and underground water rising; the waterproof layer can accelerate the attenuation of the dynamic stress in the subgrade, the dynamic stress along the transverse distance reveals “Z” shape distribution, and its peak value appears at below the track, and it is smaller at place with a distance more than 5 metres from the railway central line under vibration; the new type waterproof structure layer can meet requirements of waterproof, impenetrability, anti-vibration and impact-absorbing, and using it can improve the ride performance and stability of railway track. The results provided a reference for the construction of the newly built Yun-Gui high-speed railway in expansive soil and similar projects. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.


Shen Q.,Central South University | Yang G.,Central South University | Fang Y.,Central South University | Yang T.,Central South University | And 2 more authors.
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2016

An approximate approach to calculate moisture stress field of expansive soil is put forth based on numerical calculation and experiments. According to the similarity between the temperature stress field and humidity stress field, in-situ test of vertical expansion force is simulated by a FLAC simulated temperature stress field, aiming at determining expansive factors of a moisture stress field. Indoor model tests are used to verify the correctness of numerical analysis results. The vertical expensive forces determined by numerical simulation are close to the indoor model test results. The results show that the proposed calculation method of expansive soil moisture stress field is feasible and effective. Research results could serve for numerical analysis on the swelling characteristic of expansive soil. © 2016, Science Press. All right reserved.


Li P.,Beijing Jiaotong University | Zhang D.,Beijing Jiaotong University | Zhou Y.,Beijing Jiaotong University | Zhou Y.,China Railway 19th Bureau Group Co.
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University | Year: 2010

Water into tunnels is an important reference index for design of tunnel waterproofing and drainage systems, because it not only relates to seepage forces acting on the tunnel lining, but also relates to the safety of the ecological environment. Based on the summary of 3 main prediction methods of water inflow into tunnels: theoretical analysis method, empirical formula method and numerical analysis method, influence of many factors on water inflow into tunnels is discussed, which includes permeability of surrounding rock, cavern size, water table height, permeability of lining, permeability and thickness of grouting circle, thickness of the aquifer, and cavern shapes, et al. Differences among prediction methods of water inflow into tunnels are comparatively analyzed. The limitations and conditions for application of these methods, especially for various theories analytical methods, are highlighted. The research results can definitely provide reference and technical support for prediction of water inflow into tunnels and its control measures.


Liang X.,Southwest Jiaotong University | Liang X.,Guangxi University of Science and Technology | Cheng Q.-G.,Southwest Jiaotong University | Chen J.-M.,Southwest Jiaotong University | Li L.-G.,China Railway 19th Bureau Group Co.
Yantu Lixue/Rock and Soil Mechanics | Year: 2015

Limit research effort has been made to explore the mechanism and settlement of high-speed railway bridge above goaf. With the pile group foundation of Guanshandi bridge in Hefei-Fuzhou high-speed railway as a prototype, a model test is carried out. According to the similarity theory, the similarity constants are derived and the similarity model materials are produced; and then the model setup is made. Based on multistage loading tests, three types of data are achieved including the internal forces of piles, stresses of soil among piles and the settlements of pile, pile caps, roof of goaf, the behaviors of piles and soils among piles as well as the settlement of goaf roof are determined. It can be found that the influence of goaf on the bearing capacity of pile is inversely proportional to the load. For all model piles, no negative skin friction is found to occur along pile shaft; and the center of the distributed skin friction in goaf descends significantly compared to those of the conventional piles. There is a critical value for the uneven settlement of pile group above goaf. If the settlement exceeds the critical value, the uneven settlement will stop growing. In addition, according to the test results and theoretical analysis, the equations for calculating bearing capacity and settlement of pile group above goaf are proposed based on the current code. ©, 2015, Academia Sinica. All right reserved.


Zhao L.C.,China Railway 19th Bureau Group Co.
Applied Mechanics and Materials | Year: 2014

In the Xiamen-Shenzhen Railway 32 m-span prestressed concrete box girder construction process, concrete box girder cracks always confused engineering and technical personnel, is a common and more difficult to solve quality problems, for box girder concrete surface cracks issues were discussed, and put forward a repair program to be applied in construction practice. © (2014) Trans Tech Publications, Switzerland.


Zhao L.C.,China Railway 19th Bureau Group Co.
Applied Mechanics and Materials | Year: 2014

A speed-railway double-track tunnel 1# slant hole L7 slices are extremely rich water, the weathering depth to surface 270m, layer thickness of about 25m, the main filling material for decomposed granite clip diabase, diorite, sand-like and earthy. When tunnel excavation, extremely vulnerable and water burst mud. Using pipe roof curtain grouting method reinforcement after, The entire decency granite and the diorite-porphyrite obtain reinforce effectively push densely, drills takes in the core type to have the massive cement blocks, shuts off the water the function to be good, had guaranteed effectively excavates the section the construction progress. This article used the three dimensional finite element method to construct various stages to this tunnel through the L7 slices region pipe roof grouting method to conduct the analysis research, According to the analysis results timely and reasonable arrangements for excavation footage, research results can provide a reference for similar projects. © (2014) Trans Tech Publications, Switzerland.


Zhou Y.,Beijing Jiaotong University | Zhou Y.,China Railway 19th Bureau Group Co. | Li P.,Beijing Jiaotong University | Li P.,Economic and Planning Research Institute of the Ministry of Railways | And 2 more authors.
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University | Year: 2012

The rational design of supporting structure is the key to the design of large section loess tunnel, focusing on a loess railway tunnel in construction, this paper analyses the change situations of the loess tunnel supporting structure, rock stress state and mechanical behavior under the different construction times of initial support by numerical simulation. Centering on the controlling of the rock deformation, a reasonable proposal for construction time of initial support is given. And the force law of loess tunnel initial support is also summed up with the outcomes of field monitoring. Loess has a significant rheological property. A large part of the force acting on the supporting structure is caused by the additional load generated by rock rheology. In addition, the force of supporting structure is not evenly distributed and symmetrical in the space, which should be considered in the design.


Shen Q.,Central South University | Yang G.-L.,Central South University | Fang Y.-H.,Central South University | He X.,Central South University | He X.,China Railway 19th Bureau Group Co.
Tiedao Xuebao/Journal of the China Railway Society | Year: 2015

The new type of waterproof and drainage structures were used to control the changes of moisture content in expansive soil layer, to remedy the expansive soil in the Guangxi section of the newly built Yunnan-Guangxi railway. The FLAC3D finite difference software was applied to study the dynamic response rules of the new cutting bed structure (where a new type of waterproof and drainage structure layer was built) in the medium-strong and medium-weak expansive soil sections of the Yunnan-Guangxi railway under the train load condition. The results of numerical analysis were verified with the results of the field test. Comparative analysis was given on the similarities and differences of the dynamic response of the bed in the two kinds of expansive soil. The research results proved that: the dynamic stress, dynamic displacement, vibration velocity and acceleration within the new bedding structure decreased with the increase of the depth. The calculating results for the dynamic stress of new cutting bed structure were basically consistent with the measured values of the calculation software. This proved that the numerical simulation was feasible to analyze the dynamic response rules of the new bed. The dynamic stress and shear stress of the top surface of the new type of waterproof and drainage layer in the medium-strong and medium-weak expansive soil differed from the dynamic stress and shear stress of the bottom surface of the layer. However, the attenuation law of dynamic stress, dynamic displacement, vibration velocity and acceleration within the new bedding structure was consistent. The conclusion can be used for reference for the design, construction and dynamic response study of high-speed railway cutting subgrade in expansive soil area. ©, 2015, Science Press. All right reserved.

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