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Dong C.,Shijiazhuang University of Economics | Li Z.,Shijiazhuang University of Economics | Ma J.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co.
Geological Engineering and Mining Exploration in Central Asia - Proceeding Source: The XVIII Kerulien International Conference on Geology, KICG 2013 | Year: 2013

Locked patch is the stress concentration with higher intensity on the landslide surface, the occurrence and the development of the landslide are controlled by locked patch, and the effect of locked patch on the stability of landslide is a hot topic in the landslide world in recent years. Recently state both at home and abroad the current situation and research trend of the locked patch in three ways, namely failure mechanism of locked patch, the damage of locked patch and landslide deformation and the locked patch theory. It is thought that the number, the geometry shape and the distribution location on the slip surface of locked patch are critical to the application of locked patch theory. Large-scale physical mode test is the useful way to study the correlativity between the factors such as the geometry shape and the distribution location of locking segment and landslide deformation, is more reliable than the instance data statistics and numerical simulation study. Source


Li Z.,Shijiazhuang University of Economics | Ma J.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Cao Y.,Guangdong Academy of Forestry | Xu B.,Shijiazhuang University of Economics
Applied Mechanics and Materials | Year: 2012

Vacuum Tube Well Dewatering (VTWD) is one of high efficiency methods to vacuum dewatering in Beijing district in recent years. Water output, surrounding drawdown, and land settlement of vacuum and normal tube well respectively were measured during the process of engineering dewatering at three sites in Beijing subway engineering. The results showed that the water output by VTWD was 1.6 to 2 times than that by Normal Tube Well Dewatering (NTWD) while the land settlement was twice compared to NTWD. It is suggested to consider the carrying capacity of surrounding environment when using VTWD. © (2012) Trans Tech Publications, Switzerland. Source


Tao L.J.,Beijing University of Technology | Zhang B.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Zhao X.,Beijing University of Technology | Liu L.,Beijing University of Technology | And 3 more authors.
International Efforts in Lifeline Earthquake Engineering - Proceedings of the 6th China-Japan-US Trilateral Symposium on Lifeline Earthquake Engineering | Year: 2014

According to the Cross-structure between subway station and tunnel in formation condition of silt sand in Beijing, a series of shaking table tests on the dynamic interaction between soil and structure are carried out. In the case of inputting waves, monitor the acceleration, displacement of soil, the acceleration, strain of structure and dynamic earth pressure between soil and structure. Research on the seismic force and deformation characteristics of station, and analyzed the interaction law of seismic response of Cross-structure of subway station and tunnel. The result shows that the top displacement of model box is larger than the bottom, and the distribution law of the acceleration is contrary. The acceleration response of shallow soil is weakened with the structure buried. The interaction force between soil and structure is comparatively large. The strains of columns and walls are larger than which of beams and plates. Stress concentration is generated on the joints. The bottom tunnel can absorb the earthquake waves coming from shaking table test, and reduce the seismic response of the upper station structure. The week effect reduces with soil thickness increasing. Source


Wu F.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Wu F.,Beijing Urban Construction Group Co. | Wu F.,University of Science and Technology Beijing | Jin H.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | And 2 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2013

The building/structure settlement curve fits to the normal distribution. The Peck formula in tunnel engineering ground surface settlement prediction is derived, and its parameter meaning is changed to establish the building/structure settlement prediction formula. The single and two layer buildings load effect on the deformation are studied by the engineering cases summary and theoretical analysis. The building/structure settlements in different locations of tunnel engineering are studied by numerical simulation. With the existing parameter value of volume loss(Vl) and building/structure settlement prediction formula, the reference value of building/structure settlement trough width parameter(Ks) in different countries are calculated. The engineering practices show that the building/structure settlement prediction formula calculation result, numerical simulation result and monitoring result are in good agreement. The formula has very good practicality, and it could be applied to similar building/structure foundation settlement prediction. Source


Wu F.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Wu F.,Beijing Urban Construction Group Co. | Wu F.,University of Science and Technology Beijing | Jin H.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Shang Y.,CAS Institute of Geology and Geophysics
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2013

Through summarizing the monitoring results, it is pointed that when the pipeline rigidity is large, and the settlement between pipeline and formation is large. The general deformation law of underground pipeline is basically the same to the move of stratum. When the pipeline is vertical above the tunnel, the settlement curve fits to the normal distribution. The Peck formula for ground surface settlement prediction in tunnel engineering is corrected, and the pipeline settlement prediction formula is established. Combining the former research results of stratum loss rate V1, the reference value of pipeline settlement trough width parameter Kp is calculated. The result of numerical simulation shows that the deformation of pipeline parallel above the tunnel is more than vertical above the tunnel, and the pipeline settlement prediction formula may preliminarily evaluate the deformation of pipeline parallel above the tunnel. The rigid pipeline longitudinal strain calculation formula may also be modified to get the pipeline deformation. The engineering application proves that the pipeline settlement prediction formula, numerical simulation and monitoring results are in good agreement, and the pipeline settlement prediction formula is good in application. Source

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