Discussion on Design Points of Bridge Pile Foundation

2021 ◽  
Keyword(s):  
Pile Foundation ◽  
Bridge Pile Foundation

A brief discussion on the causes and treatment measures of bridge pile foundation defects

2015 ◽  
pp. 45-46
Author(s):  
Juan Li ◽  
Wenhong Ren ◽  
Jihong Wang ◽  
Zhao Zhang ◽  
Xiaohui He ◽  
...  
Keyword(s):  
Pile Foundation ◽  
Treatment Measures ◽  
Bridge Pile Foundation

scholarly journals Seismic Response of a Bridge Pile Foundation during a Shaking Table Test

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Yunxiu Dong ◽  
Zhongju Feng ◽  
Jingbin He ◽  
Huiyun Chen ◽  
Guan Jiang ◽  
...  
Keyword(s):  
Seismic Wave ◽  
Pile Foundation ◽  
Large Scale ◽  
Amplification Factor ◽  
Shaking Table Test ◽  
Seismic Intensity ◽  
Shaking Table ◽  
Acceleration Amplification ◽  
Bedrock Surface ◽  
Bridge Pile Foundation

Puqian Bridge is located in a quake-prone area in an 8-degree seismic fortification intensity zone, and the design of the peak ground motion is the highest grade worldwide. Nevertheless, the seismic design of the pile foundation has not been evaluated with regard to earthquake damage and the seismic issues of the pile foundation are particularly noticeable. We conducted a large-scale shaking table test (STT) to determine the dynamic characteristic of the bridge pile foundation. An artificial mass model was used to determine the mechanism of the bridge pile-soil interaction, and the peak ground acceleration range of 0.15 g–0.60 g (g is gravity acceleration) was selected as the input seismic intensity. The results indicated that the peak acceleration decreased from the top to the bottom of the bridge pile and the acceleration amplification factor decreased with the increase in seismic intensity. When the seismic intensity is greater than 0.50 g, the acceleration amplification factor at the top of the pile stabilizes at 1.32. The bedrock surface had a relatively small influence on the amplification of the seismic wave, whereas the overburden had a marked influence on the amplification of the seismic wave and filtering effect. Damage to the pile foundation was observed at 0.50 g seismic intensity. When the seismic intensity was greater than 0.50 g, the fundamental frequency of the pile foundation decreased slowly and tended to stabilize at 0.87 Hz. The bending moment was larger at the junction of the pile and cap, the soft-hard soil interface, and the bedrock surface, where cracks easily occurred. These positions should be focused on during the design of pile foundations in meizoseismal areas.

scholarly journals Experimental and Application Study on Underpinning Engineering of Bridge Pile Foundation

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Lei Yan ◽  
Gang Wang ◽  
Min Chen ◽  
Kefeng Yue ◽  
Qingning Li
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Shear Capacity ◽  
Application Study ◽  
Calculation Results ◽  
Shear Bearing Capacity ◽  
Similarity Ratio ◽  
Loading Tests ◽  
New Formula ◽  
Bridge Pile Foundation

In order to study the theory and application of the pile foundation underpinning technology, 3 local node models of underpinning structures with a similarity ratio of 1/1 were made and the progressive repeated static loading tests were conducted. The shear and antislip properties of the joint are studied, and the improved formula for calculating the shear capacity is proposed. The results show that a planting bar plays a major role in shear resistance, and the hoop rate can improve the shear capacity of the interface. The new formula for calculating the shear-bearing capacity is proposed, and the calculation results of the formula of shear-bearing capacity are in good agreement with the experiment results. It is completely feasible to use this formula to calculate the shear-bearing capacity of the pile foundation underpinning structure. During the test, the bearing capacity of the model is good, which proves the reliability of the underpinning technology is good, and it can provide experimental and theoretical basis for the underpinning of similar projects.

Analysis of Tunnel Running through Bridge Pile Foundation Based on the MIDAS/GTS

2014 ◽  
Vol 721 ◽  
pp. 809-812
Author(s):  
Jin Kui Li ◽  
De Jin Tang
Keyword(s):  
Pile Foundation ◽  
Horizontal Displacement ◽  
Central Line ◽  
Internal Force ◽  
Construction Process ◽  
Underground Engineering ◽  
Finite Element Software ◽  
Bridge Pile Foundation ◽  
Shield Machine ◽  
Sedimentation Value

Based on the problem of tunnel running through bridge pile foundation, a 3d numerical model is built by the finite element software MIDAS/GTS in order to research the internal force and the displacement of the pile and soil during the Construction process. The sedimentation value of the top of the pile is bigger than others. Because the bigger thrust about the Shield machine, the horizontal displacement of the pile is increasing at first and decreasing at last from a positive into a negative. Because of the loss of the soil, the soil beside the pile collapses and causes strong friction force. The surface sedimentation value which is near the central line of the tunnel is bigger than other place. This paper is of good reference roles in the similar underground engineering in Dalian.

Numerical Analysis of Tunnel Running through Bridge Pile Foundation

2015 ◽  
Vol 744-746 ◽  
pp. 978-981
Author(s):  
Jin Kui Li ◽  
De Jin Tang
Keyword(s):  
Pile Foundation ◽  
Horizontal Displacement ◽  
Central Line ◽  
Internal Force ◽  
Construction Process ◽  
Underground Engineering ◽  
Finite Element Software ◽  
Bridge Pile Foundation ◽  
Shield Machine ◽  
Sedimentation Value

Based on the background of Dalian subway running through bridge pile foundation, a 3d numerical model is built by the finite element software MIDAS/GTS in order to research the laws of the internal force and the displacement of the pile and soil during the Construction process. The outcome reflects that the sedimentation value of the top of the pile is bigger than others. Because the bigger thrust about the shield machine, the horizontal displacement of the pile is increasing at first and decreasing at last from a positive into a negative. Because of the loss of the soil, the soil beside the pile collapses and causes strong friction force. The surface sedimentation value which is near the central line of the tunnel is bigger than other place. This paper is of good reference roles in the similar underground engineering in Dalian.

Influence of water-rich tunnel by shield tunneling on existing bridge pile foundation in layered soils

2021 ◽  
Vol 28 (8) ◽  
pp. 2574-2588
Author(s):  
Kan Huang ◽  
Yi-wei Sun ◽  
De-quan Zhou ◽  
Yu-jian Li ◽  
Meng Jiang ◽  
...  
Keyword(s):  
Pile Foundation ◽  
Layered Soils ◽  
Shield Tunneling ◽  
Influence Of Water ◽  
Bridge Pile Foundation
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