Measurement Analysis of the Influence of Subway Station Construction to the Adjacent Building and Ground Surface Deformation

2012 ◽  
Vol 518-523 ◽  
pp. 4399-4404
Author(s):  
Jian Song ◽  
Xiao Yang Rong ◽  
Yun Yun Fan
Keyword(s):  
Surface Deformation ◽  
Ground Surface ◽  
Soil Disturbance ◽  
Surface Subsidence ◽  
Surface Settlement ◽  
Subway Station ◽  
Rock Foundation ◽  
Measurement Analysis ◽  
Adjacent Building ◽  
Ground Surface Settlement

According to the tracing monitoring results of surface settlement and deformation of method of PBA in large-span tunnel used in the construction of the of Shenyang subway station, the analysis shows the ground surface settlement characteristics and laws influenced by the process of tunnel excavation influence. The result shows that the influence to formation of soil disturbance is large, the step sequences influence the deformation of the surface subsidence obvious are the small pilot drift excavation and the buckle arch of the first lining, accounting for about 70% of the final settlement, while the other is smaller, therefore the key of the project is to control the ground surface settlement of the small pilot drift excavation and the buckle arch of the first lining. Analysis also shows that, the effect of grouting consolidation in the upper strata in the arch crown and surrounding rock foundation of buildings before the construction to reduce the surface subsidence and building deformation is obvious.

Analysis of the Ground Surface Settlement of Metro Tunnel by Using Peck Formula

2014 ◽  
Vol 1065-1069 ◽  
pp. 414-420
Author(s):  
Xiong Fei Yang ◽  
Hong Yuan ◽  
Jia Yu Wu ◽  
Hou Mei Zhang
Keyword(s):  
Surface Deformation ◽  
Ground Surface ◽  
Surface Subsidence ◽  
Central Point ◽  
Surface Settlement ◽  
Point Method ◽  
Linear Regression Method ◽  
Tunnel Excavation ◽  
Ground Surface Settlement ◽  
Ground Surface Subsidence

Based on the peck formula, this paper has analyzed measured data of ground surface subsidence, and get the regression curve of ground surface subsidence. Expression for degree of reliability of the maximum ground surface settlement is derived analytically by using central-point method. On the basis of a certain section of tunnel of Guangzhou subway constructed by mining excavation method, linear regression method can be effectively fitting the ground surface deformation data due to tunnel excavation. The central-point method provides a new way for reliability analysis of the ground surface settlement of shield construction.

Analysis of Surface Subsidence Rule of the Shallow Subway Tunnel Construction

2013 ◽  
Vol 671-674 ◽  
pp. 1081-1086 ◽  
Author(s):  
Fei Fei Wang ◽  
Hui Ren Bai ◽  
Jing Jing Li
Keyword(s):  
Ground Surface ◽  
Calculation Model ◽  
Surface Subsidence ◽  
Surface Settlement ◽  
Tunnel Construction ◽  
Maximum Point ◽  
Subway Tunnel ◽  
Monitoring Frequency ◽  
Ground Surface Settlement ◽  
Value Range

In order to study the Dalian Metro section 202(Cujin Road station-Chunguang Street station, which is shallowly buried and covered with plain fill)’s ground surface settlement, the monitoring measuring station was built during the construction. After 3 months’ measuring by precision level,the data shows that the maximum point is in the center line of the tunnel of the upper part. The settlement is about 25.66-31.82mm. This paper put forward the concept of the distance span ratio β, β effective value range was - 4 <β< 4,Surface subsidence is closely related with β, Severe surface subsidence stage is -2 <β< 2, Occupy whole deformation is 67.5-77.6%,settlement rate about 0.84-0.93mm/d, so should strengthen the monitoring frequency, Suggest increases site tour. Field test results and the ground surface settlement calculation model winkle are identical with each other; the monitoring results have important guiding significance and reference for Dalian subway and the similar shallow depth excavation tunnel construction.

Prediction of Shield Tunnelling-Induced Ground Settlement Considering Soil-Water Coupled and around Soil Disturbance Damage

2010 ◽  
Vol 168-170 ◽  
pp. 357-364
Author(s):  
Ji Feng Liu ◽  
Bo Liu ◽  
Hui Zhi Zhang
Keyword(s):  
Numerical Simulation ◽  
Soil Water ◽  
Ground Surface ◽  
Soil Disturbance ◽  
Surface Settlement ◽  
Shield Tunnel ◽  
Tunnel Construction ◽  
Ground Settlement ◽  
Ground Surface Settlement ◽  
Shield Tunnelling

to evaluate the influence of soil-water coupled and shield tunnel construction induced around soil disturbance damage on ground surface settlement, the process of shield tunnel construction induced around soil disturbance is analyzed, the FLAC3D numerical simulation are carried out, and a newly-modified tunnelling-induced ground settlement calculation method based on disturbance degree of around soil and soil-water coupled is presented, and these methods are applied in case of Beijing Metro 10thLine. It is indicated that considering the influence of the shield tunnelling-induced around soil disturbance damage, and soil-water coupled induced soil properties weakening and the excess pore water pressure dissipating induced soil consolidation to the ground surface settlement are necessary, the calculating result of the newly-modified surface settlement prediction method, and the result FLAC3D numerical simulation all agree well with in-site observed data of Beijing Metro 10th Line.

Ground surface settlement response to subway station construction activities using pile–beam–arch method

2021 ◽  
Vol 108 ◽  
pp. 103729
Author(s):  
Xiangyu Guo ◽  
Zhengzheng Wang ◽  
Ping Geng ◽  
Changjian Chen ◽  
Jing Zhang
Keyword(s):  
Ground Surface ◽  
Surface Settlement ◽  
Subway Station ◽  
Ground Surface Settlement

Optimization of Construction Method for Shijiazhuang Xinbai Subway Station

2014 ◽  
Vol 580-583 ◽  
pp. 1203-1206
Author(s):  
Chun Yan Gao ◽  
Jian Guang Niu ◽  
Dong Yang Geng
Keyword(s):  
Environmental Influence ◽  
Fuzzy Optimization ◽  
Ground Surface ◽  
Optimization Theory ◽  
Construction Method ◽  
Surface Settlement ◽  
Subway Station ◽  
Construction Methods ◽  
Ground Surface Settlement ◽  
The Impact

To choose an appropriate construction scheme for subway, it,s feasible to use fuzzy optimization theory and comprehensively consider the security of four construction methods as well as such factors as environmental influence, construction period, construction difficulty and construction cost, etc. to set up a mathematical model for the construction method of subway station. An analysis is made on the impact of group-effect in the excavation construction of pilot tunnel presented in PBA construction method on arch crown settlement and ground surface settlement, and a study is made on the arch crown settlement and ground surface settlement caused by the four construction methods in construction process. In addition, a contrastive analysis is made to draw a conclusion that PBA construction method is the most suitable construction method for Xinbai Square Subway Station in Shijiazhuang.

scholarly journals MONITORING OF SURFACE SUBSIDENCE OF THE MINING AREA BASED ON SBAS

2018 ◽  
Vol XLII-3 ◽  
pp. 2603-2608
Author(s):  
Y. Zhu ◽  
S. Zhou ◽  
D. Zang ◽  
T. Lu
Keyword(s):  
Ground Surface ◽  
Surface Mining ◽  
Mining Area ◽  
Radar Data ◽  
Surface Subsidence ◽  
Surface Settlement ◽  
Jiangxi Province ◽  
Time Dimension ◽  
Short Baseline ◽  
Ground Surface Settlement

This paper has collected 7 scenes of L band PALSAR sensor radar data of a mine in FengCheng city, jiangxi province, using the Small-baseline Subset (SBAS) method to invert the surface subsidence of the mine. Baselines of interference less than 800m has been chosen to constitute short baseline differential interference atlas, using pixels whose average coherent coefficient was larger than or equal to 0.3 as like high coherent point target, using singular value decomposition (SVD) method to calculate deformation phase sequence based on these high coherent points, and the accumulation of settlements of study area of different period had been obtained, so as to reflect the ground surface settlement evolution of the settlement of the area. The results of the study has showed that: SBAS technology has overcome coherent problem of the traditionality D-InSAR technique, continuous deformation field of surface mining in time dimension of time could been obtained, characteristics of ground surface settlement of mining subsidence in different period has been displayed, so to improve the accuracy and reliability of the monitoring results.

Numerical Simulation of Ground Surface Settlement Induced by Open-Cut Subway Station

2014 ◽  
Vol 522-524 ◽  
pp. 1689-1692
Author(s):  
Yan Hui Guo ◽  
Ke Peng Hou
Keyword(s):  
Optimization Design ◽  
Three Dimensional ◽  
Ground Surface ◽  
Surface Settlement ◽  
Subway Station ◽  
Structure Stability ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Ground Surface Settlement ◽  
Survey Results

Ground surface settlement induced by open-cut subway station has important implications for construction safety. Based on a subway station background of the line 3 west extension engineering of kunming metro line co.LTD. On the basis of geological survey results and indoor geotechnical mechanics experiment, the 3D geological model was established by three-dimensional finite difference method FLAC3D. Ground surface settlement Law and Retaining structure stability induced by subway station construction was analyzed. The analysis results provides a reference for structure optimization design and scientific construction of similar deep foundation pit engineering.

scholarly journals Deformation Characteristics of Raising, Widening of Old Roadway on Soft Soil Foundation

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2117
Author(s):  
Keke Li ◽  
Wenyuan Xu ◽  
Liang Yang
Keyword(s):  
Lateral Displacement ◽  
Soft Soil ◽  
Ground Surface ◽  
Surface Settlement ◽  
Deformation Characteristics ◽  
Construction Methods ◽  
Ground Surface Settlement ◽  
Total Settlement ◽  
Soil Foundation ◽  
Soft Soil Foundation

The deformation characteristics of a raised and widened old Chinese roadway on a soft soil foundation are investigated in this study via finite element numerical simulation. The rules of ground surface settlement, slope foot lateral displacement, and ground surface settlement evolution of the roadbed under three modes (one-time construction of an eight-lane expressway, widened four-lane expressway, and raised/widened four-lane expressway) are compared. The ground surface settlement process of the eight-lane road foundation, which is formed by first widening and then raising the road, is highly complex. The ground surface settlement curve under the old road foundation increases and then decreases. The lateral displacement of the slope foot also interacts with the widening and raising of the eight-lane roadbed foundation. The range of lateral displacement is 70.05, 42.58, 124.81, 104.54 mm. Fifteen years after construction, the total settlement of the raised and widened roadbed is much larger than that of the one built directly. The total settlement values at the center of the two roadbeds are 297.05 and 234.85 mm, respectively. This manuscript provides data support for the reconstruction and expansion of roads on soft soil foundations, for choosing appropriate construction methods to build roads, and for avoiding major road damage, which is of great significance to the construction of road infrastructure in the future.

scholarly journals Analysis of the Additional Stress and Ground Settlement Induced by the Construction of Double-O-Tube Shield Tunnels in Sandy Soils

2019 ◽  
Vol 9 (7) ◽  
pp. 1399 ◽  
Author(s):  
Wen Zhao ◽  
Peng-jiao Jia ◽  
Lin Zhu ◽  
Cheng Cheng ◽  
Jianyong Han ◽  
...  
Keyword(s):  
Ground Surface ◽  
Field Measurements ◽  
Surface Settlement ◽  
Additional Stress ◽  
Underground Construction ◽  
Shield Tunneling ◽  
Engineering Project ◽  
Ground Surface Settlement ◽  
Potential Damage ◽  
Lateral Friction

Double-O-tube shield tunneling has attracted increasing attention because it offers cost-efficiency in underground construction. Prediction of ground surface settlement and the variety of additional stresses induced by shield construction is crucial to underground construction in metropolises since excessive settlement could trigger potential damage to the surrounding environment. The additional stresses induced by the propulsion of double-O-tube shields are calculated by means of the Mindlin’s equations of elasticity. The characteristics of additional stresses are analyzed with compound Gauss-Legendre integral arithmetic, and the frontal additional thrust, the lateral friction, and the ground loss are taken into account. Subsequently, based on field measurements, the maximum settlement coefficient and width of the settlement trough coefficient of the typical Peck formula are modified. The predictive curve of the Peck formula is closer to the engineering measured data than that of the typical formula. The cut-off functions of ground surface settlement caused by double-O-tube tunnel shield construction are proposed and can predict the shape of ground surface settlement, such as single peak or double peak. The correctness of the proposed functions is verified based on an engineering project.

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