China Construction Municipal Construction Corporation Ltd

Beijing, China

China Construction Municipal Construction Corporation Ltd

Beijing, China
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Wang S.L.,Beijing University of Technology | Mu M.G.,Taiyuan University of Technology | Chen D.W.,China Construction Municipal Construction Corporation Ltd | Ren G.,Beijing University of Technology
Applied Mechanics and Materials | Year: 2012

Method of jet grouting has become one of the ground improvement technologies used to address seepage concerns and to provide strength improvement of soils. The soilcrete columns can be also used to form seepage vertical cut-off walls from a series of continuous and interconnected vertical columns in deep pit. If the native soil is not completely mixed with slurry, the resulting columns will have soil inclusions which can increase the permeability of the column or fail barrier to water flow. Specifications of soilcrete columns that are achieved from the jet grouting procedures from the diameter and strength aspect depend on jet grouting parameters such as grout pressure, lifting speed, number and diameter of nozzles and c/w ratio and specifications of local soil. Different soil must use different jet grouting parameters. © (2012) Trans Tech Publications, Switzerland.


Wang S.L.,Beijing University of Technology | Chen D.W.,China Construction Municipal Construction Corporation Ltd | Wang R.,Beijing Institute of Petrochemical Technology
Advanced Materials Research | Year: 2012

The behavior of a foundation built on normally consolidated soft soil reinforced with stone columns (SC) and deep mixing columns (DMC) is studied using a finite element analysis program, Phase2D. The numerical predictions are analyzed in terms of absolute vertical displacement, absolute horizontal displacement, mean stresses, volumetric strain, maximum shear strain and strength reduction factor. Firstly, the effectiveness of the use of stone columns, the first composite ground, is studied. Afterwards, because load bearing capacity is less than 160 kPa designed, the effectiveness analysis reinforced with DMC, the second composite ground, is performed to study the influence on the soil-columns system of the foundation and columns. © (2012) Trans Tech Publications, Switzerland.


Wang S.L.,Beijing University of Technology | Chen D.W.,China Construction Municipal Construction Corporation Ltd | Wang R.,Beijing Institute of Petrochemical Technology
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011

The efficiency of end bearing vibro-replacement stone columns in reducing the settlement of a multipurpose utility tunnels foundation system is designed in this paper. The foundation system is designed to consist of a large number of regularly spaced vibro-replacement stone columns of unequal length installed in a weak soil layer( stratum includes plain fill, silty clay including mire, clay, cobble, stone and bedrock )and supporting a rigid mat. At first, the analysis summarizes the influence of such factors as the column spacing, the weak soil properties, properties of the granular medium used in constructing the column, the in situ stresses caused by the installation technique, the depth of the bedrock relative to the tip of the columns and the magnitude of the uniformly distributed load carried by the supported raft foundation. The second, the paper examines the s-p, s-lg t curve of the single piles, the plane load of soil between piles, the composite foundation of the multi-pile. This paper is concluded by presenting a number of design parameter that was used in the construction of such a foundation scheme. © 2011 IEEE.


Yang X.,Central South University | Zhang K.,Central South University | Li Z.,China Construction Municipal Construction Corporation Ltd | Deng M.,China Construction Municipal Construction Corporation Ltd
Zhongguo Tiedao Kexue/China Railway Science | Year: 2011

Based on soil arching effect theory, the soil arching effect model of jacking pipes in new pre-construction method is built. According to the force analysis of the arch axes in the model, the relation formula between the constraining counter-force of the arch axes support and the geometric parameters of the model is gotten. Combined the relation formula with the strength control conditions of the top and feet of arch simultaneously, the equation for calculating the maximal distance between jacking pipes is deduced. The integral stability of soil arch under the maximal distance between jacking pipes is checked, which can prove the rationality of the maximal distance between jacking pipes. Taken the jacking pipes at the top of No.1 air channel in Xinle Ruins Station of Shenyang Metro as example, the distance between jacking pipes is 3.28 m by calculation. The changes of cutting position on steel pipe and the diameter of steel pipe are suggested to optimize the design of the distance between jacking pipes. The optimal designs can reduce the quantities of steel pipes, save construction time, thereby reduce surface settlement.


Li Y.-S.,Central South University | Li Y.-S.,Hunan City University | Zhang K.-N.,Central South University | Huang C.-B.,China Construction Municipal Construction Corporation Ltd | And 2 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

Underground station of Shenyang Metro line 2 is the first underground engineering built by pipe-roof pre-construction method (PPM). The surface subsidence caused by the construction was monitored; and revised Peck model was developed to predict the subsidence. Some conclusions are drawn as follows. (1) The predicted result is consistent well with the monitoring data. (2) Surface subsidence caused by tunnel construction with PPM is characterized by the whole subsidence; and the subsidence value is pretty equal to the one of underground structure foundation, and it is effective to control surface subsidence by controlling the the sink of foundation of tunnel structure with PPM. (3) The underground permanent structure built before constructing tunnel with PPM could obviously constraint the surrounding rock with 0.0005%-0.0020% of stratum loss rate and 0.5 of width coefficient of sinking tank. (4) Surface subsidence caused by PPM is much less than the normal construction method, which has significantly social and environmental benefits; and this method is suitable to construct the underground urban traffic hub and tunnel projects that crossing traffic trunk lines and is worth to be studied and promoted further.


Li Y.,Central South University | Li Y.,Hunan City University | Zhang K.,Central South University | Huang C.,China Construction Municipal Construction Corporation Ltd | And 2 more authors.
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011

Urban underground engineering construction may have bad influence on the environment and even cause disasters. Pipe-roof Pre-construction Method(PPM) had been used in building a metro station of line No.2 of Shenyang subway. It's very important to analyze and evaluate the deformation of the environment in order to ensure the safety of constructing procedure. So, based on the detailed study of geological conditions and PPM, Flac3D software combined with field monitoring data in stations earthwork phase is used. And then, research on the surface and vault settlement, arch feet headroom convergence and tunnel structure deformation law is presented. The results show that :(1)numerical simulation is close to the monitoring data, which ensures the large cross-section single arch tunnel construction safety, and provides guidance for the first successful application and research of this method in China mainland area. (2)The surface deformation and vault subsidence could be less by using PPM to build large sections tunnel, and in the whole PPM construction process of surface subsidence caused by the proportion is less too, which could meet the requirements of controlling the surface subsidence target. (3)It deserves further research and extension for the PPM to build underground space, because it has obviously social and environmental benefits, and can be used to build traversing urban traffic hub of the underground engineering. © 2011 IEEE.


Yang X.,Central South University | Zhang K.-N.,Central South University | Li Z.,China Construction Municipal Construction Ltd Corporation | Deng M.-L.,China Construction Municipal Construction Ltd Corporation | Xiao Z.-Q.,Central South University
Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology | Year: 2012

In order to research the influence of jacking of dense steel pipe group with large diameter on earth surface settlement in pipe roof pre-construction method, the spacing of parallel jacking pipes was classified into such three kinds as large spacing, medium spacing and small spacing. The ranges of three kinds of spacing were clearly defined, and the effect of the existing pipes on the earth surface settlement of new pipes with various pipe spacing was summarized and analyzed. The analysis shows that the effect of the existing pipes on the soil disturbance can be ignored with large spacing, the effect is mainly soil disturbance with medium spacing, and the effect concerns both soil disturbance and support action of the existing jacking pipes with small spacing. In addition, Peck formula was analyzed and modified to predict the earth surface settlement with various spacing. In combination with the construction monitoring results of Xinle Ruins Station of Shenyang Metro, the monitoring results of earth surface settlement were compared with the values predicted by Peck formula. It is found that the two curves are in better agreement.


Li Y.-S.,Hunan City University | Li Y.-S.,Central South University | Zhang K.-N.,Central South University | Huang C.-B.,China Construction Municipal Construction Corporation Ltd
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

The mechanical response of the Chinese first tunnel project built by using the pipe-roof pre-construction method (PPM) during the process of large excavation is studied. The data of dynamic change regulation obtained and the accumulated field measurement can provide evidence to judge the safety and stability of the tunnel and ensure the application of PPM. The study shows: (1) the stress and deformation of the lining structure are very small, the pre-construction lining structure achieves good effectiveness to control the structural deformation and the stratum loss; (2) the greatest monitored value of lining structure is only 30% of the design value of stress, and the pre-construction lining structure improves the self-stabilized ability and reduces the pressure of tunnel surrounding rock; (3) the interval of the passive earth pressure is small, which means the interaction between lining structure and surrounding rock is not obvious; (4) because the settlement at the top of arch reaches 5 mm in the day when the top of the tunnel is penetrated, the structural and environmental effects during the penetration should be considered in the design, and monitoring and analysis need to be intensified during the construction; (5) the PPM technology for building underground space can control deformation in tunnel lining structure and ground settlement, and it has great social and environmental benefits and is worthy to be studied and promoted further.


Li Y.-S.,Central South University | Li Y.-S.,Hunan City University | Zhang K.-N.,Central South University | Huang C.-B.,China Construction Municipal Construction Corporation Ltd | And 2 more authors.
2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011 - Proceedings | Year: 2011

It's one of the key problems that ground deformation and influeced to the near buidings couseed by the city underground space construction. The surface deformation and vault subsidence regularity are analysed for station within the turkmen excavation to ensure the technology successful application to underground subway station in Shenyang Metro Line 2, based on FLAC3D simulation. Results show that, (1) the surface deformation and vault subsidence could be less by using Pipe-roof Pre-construction Method in the full-section turkmen excavation, and in the whole Pipe-roof Pre-construction Method construction process of surface subsidence caused by the proportion is less too, which could meet the requirements of controlling the surface subsidence target. (2) with the great influence of horizontal loads, the underground structure in advance could partially offset the ground deformation caused by vertical loads. the surface deformation and vault subsidence tend to be stable, and the sedimentation curve rebounds a little. Pipe-roof Pre-construction Method is much better than depth-span ratio underground structure in controlling the ground deformation. (3) surface deformation and vault settlement of shallow buried underground arch shell structure were basically equal, which built by Pipe-roof Pre-construction method, and there was a phenomenon that the surface deformation was bigger than vault settlement during station within the turkmen excavation. (4) The supporting structure beforehand built by Pipe-roof Pre-construction method could almost completely replace the supporting function of the earthwork excavated to the surrounding rock. The Pipe-roof Pre-construction method deserves further research because it has no bad influence to near environment, has obviously social and environmental benefits, and can be used to build traversing urban traffic hub of the underground engineering. © 2011 IEEE.


Yang X.,Hunan University of Science and Technology | Yang X.,Central South University | Zhang K.-N.,Central South University | Li Y.-S.,Hunan City University | And 2 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2013

Theoretical and experimental analyses are conducted for the pipe jacking force of the great depth pipeline in pipe roof pre-construction method. The pipe jacking force is closely related to the vertical soil pressure. Reference to the calculation method of vertical earth pressure in tunnel excavation, there are two kinds of frequently-used theories to calculate vertical earth pressure in pipe jacking, i.e. M. M. Promojiyfakonov theory and Terzaghi theory. After analyzing the adaptability and defects of the two kinds of theories, new modified theoretical formula based on M. M. Promojiyfakonov theory and Terzaghi theory is got to calculate vertical earth pressure; and MATLAB program is written to calculate the numerical solution of new modified theoretical formula. Both the soil arching effect and the holding force under the arching of soil are considered in modified theory, which is more consistent with the actual soil deformation. M. M. Promojiyfakonov theory, Terzaghi theory and modified theory are used to calculate jacking force of two pipelines at different depths in pipe roof pre-construction method of Xinle Ruins Station of Shenyang Metro; the calculated results are compared to the measured results. It is shown that the results of M. M. Promojiyfakonov theory and Terzaghi theory are much larger than the measured values; the results of modified theory are slightly larger than the measured results. So that the results of modified theory are more suitable for estimating pipe jacking force of great depth pipelines.

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