scholarly journals Research on Effect of Heap Loading on Deformation and Mechanical Properties of Bridge Double Pile Foundation on Steep Slope

2020 ◽  
Vol 10 (02) ◽  
pp. 117-130
Author(s):  
Hao Luo
Keyword(s):  
Mechanical Properties ◽  
Pile Foundation ◽  
Steep Slope

scholarly journals Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst

2020 ◽  
Vol 198 ◽  
pp. 02017
Author(s):  
Zhongju Feng ◽  
Shaofen Bai ◽  
Wu Min ◽  
Jingbin He ◽  
Zhouyi Huang ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Pile Foundation ◽  
Highway Bridges ◽  
Ultimate Bearing Capacity ◽  
Steep Slope ◽  
Karst Area ◽  
Correction Coefficient ◽  
Finite Element Software ◽  
Calculation Results ◽  
Vertical Bearing

In order to study the influence of steep slope-karst coupling on the vertical bearing characteristics of pile foundation, the orthogonal simulation tests of pile foundation under 4 different roof thickness and 5 different slope are carried out by using Marc finite element software, and the correction coefficient of vertical partial bearing capacity of pile foundation according to roof thickness and slope is put forward. The test results show that when the thickness of the roof is more than 3 times the pile diameter, the ultimate bearing capacity of the pile foundation tends to be stable, and the value is about 19% when the slope is 45°; the ultimate bearing capacity of the pile foundation decreases gradually with the increase of the slope, and the reduction reaches 29.83% when the slope is greater than 45°. According to the calculation results, the variation law of vertical partial bearing capacity of pile foundation is analyzed, and the calculation formula of standard value of vertical ultimate bearing capacity of pile foundation in steep slope karst area considering both roof thickness and slope is put forward, and the correction coefficients αi and β are put forward.

scholarly journals The Research of Raft Foundation Anti-floating Piles’ Performance and its Impact on the Raft Foundation

2018 ◽  
Vol 175 ◽  
pp. 01038
Author(s):  
Qiuyun Hong ◽  
Bin Yan ◽  
Tingyu Ma
Keyword(s):  
Mechanical Properties ◽  
Pile Foundation ◽  
Vertical Displacement ◽  
Calculation Model ◽  
Vertical Load ◽  
Optimal Arrangement ◽  
Finite Element Software ◽  
Floating Pile ◽  
Raft Foundation ◽  
Slab Foundation

By using the finite element software ANSYS and ABAQUS, we established the calculation model of raft foundation anti-floating pile foundation, and studied the mechanical properties of the raft foundation and the influence of raft foundation on the foundation. By comparing the stress and displacement of the anti-floating pile under different pile distance, the influence trend of the different anti-floating pile layout scheme on the mechanical property of the floating slab foundation anti-floating pile is explained, Then the optimal arrangement scheme of anti-floating pile was acquired. Under the action of vertical load, the anti-floating pile effectively reduces the average vertical displacement of the raft, and the raft foundation improves the bearing efficiency of the pile as well as the economic efficiency.

Synthesis Experimental Study on the Supporting Capacity of the Strongly Weathered Diorite in Jinan Area

2011 ◽  
Vol 105-107 ◽  
pp. 844-847
Author(s):  
Min Shang ◽  
Qiang Xu ◽  
Yi Guo Xue
Keyword(s):  
Mechanical Properties ◽  
Pile Foundation ◽  
Physical And Mechanical Properties ◽  
Special Kind ◽  
Office Building ◽  
Social Benefits ◽  
Burial Depth ◽  
Foundation Treatment ◽  
Natural Foundation

The strongly weathered rock zone is a special kind of rocks and soils mass. For its larger burial depth and low utilization of natural foundation, the physical and mechanical properties of the strongly weathered diorite were grasped poorly. In the article, the normal investigation together with test in-situ has been applied in the project. The physical and mechanical properties of the strongly weathered diorite were analyzed deeply by the methods of field exploration, laboratory test and testing in-situ. It is feasible for the intensively weathered diorite to serve as natural foundation after lucubrate research and the evaluation of bearing capacity and settlement deformation in the project of the office building of China Industrial and Commercial Bank, Shandong Branch..It is proved from practice that the item of foundation treatment saved about two million Yuan compared with the pile foundation. Moreover it speeded up the process of the construction enormously, lessened the difficulty of the construction and obtained tremendous economic and social benefits.

scholarly journals ANALISIS POTENSI LONGSOR LERENG BUKIT TUI KELURAHAN TANAH HITAM KOTA PADANG PANJANG SUMATERA BARAT MENGGUNAKAN APLIKASI SLIDE V6.0

2019 ◽  
Vol 12 (1) ◽  
pp. 73-91
Author(s):  
Yoszi Mingsi Anaperta ◽  
Septian Andika Putra
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Steep Slope ◽  
Wire Mesh ◽  
Original Condition ◽  
Road Users ◽  
Slope Reinforcement ◽  
Boundary Equilibrium ◽  
Weak Fields ◽  
Limestone Hill

Tui Hill is a limestone hill lined south of Padang Panjang. It is located between Rao-Rao Village and Tanah Hitam. Based on the results of investigations of researchers on the slopes of Bukit Tui limestone in the coordinates S0 ° 28'21.3 "E100 ° 24'00.4ʺ which are in the Tanah Hitam Village, there are many weak fields such as burly, steep slope geometry, influence on earthquake vibrations, and rainfall the high can lead to landslides on slopes, potential for landslides on the slopes of research can endanger road users and community settlements on slope locations. This study aims to analyze the potential of landslides based on the physical and mechanical properties of intact rocks, using the boundary equilibrium method. Then make reinforcement recommendations so that slope conditions are safe / stable. Based on the results of analysis and calculations in saturated conditions with the influence of earthquake factors 0,7 - 0,9g the values ​​of FK 1,461, 1,295, and 1,144 were obtained. From the results of the analysis, the slope is unsafe / unstable. In the original condition with 0.9g earthquake factor, FK 1.364 is obtained. Based on the results of analysis and calculations, the slope reinforcement recommendation used is the wire mesh installation method (wiremesh) in slope face.

scholarly journals Analysis of the Generating and Influencing Factors of Vertical Cracking in Abutments during Construction

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Xingwei Xue ◽  
Junlong Zhou ◽  
Xudong Hua ◽  
Hongnan Li
Keyword(s):  
Mechanical Properties ◽  
Pile Foundation ◽  
Age Difference ◽  
Construction Process ◽  
Factors Affecting ◽  
Crack Control ◽  
Temperature Changes ◽  
Concrete Shrinkage ◽  
Pile Cap ◽  
The Impact

In order to analyze the causes of cracking in abutments subject to concrete shrinkage and temperature variation during the construction process and to determine factors affecting the mechanical properties of the abutment, nonlinear calculations capturing abutment behavior are conducted with Midas/FEA software. Using these calculations, the cracking mechanism is identified, and the influence of the evaluated factors is analyzed. It is concluded that the deformation between the pile cap and abutment backwall as constrained by a pile foundation when subjected to concrete shrinkage and temperature changes is the basic cause of abutment cracks during construction; these cracks form over the piles and develop upward. For a given reinforcement ratio, the distribution of horizontal crack-control steel using small, closely spaced bars is more beneficial. When pile-bearing capacity meets the standard, the width of the generated cracks tends to decrease with the decrease in the diameter of the piles. The existence of a postcast strip in the abutment backwall also contributes to the decrease in the depth of the crack. Finally, the impact of age difference between the pile cap concrete and abutment backwall concrete on cracking is inconsequential.

SOME FEATURES OF FOUNDATION STAGE IN CONSTRUCTION PROCESS OF HIGH-RISE BUILDINGS LOCATED ON STEEP SLOPES IN AREAS WITH HIGH SEISMICITY

2019 ◽  
Vol 7 (1) ◽  
pp. 20-27
Author(s):  
Максим Мариничев ◽  
Maxim Marinichev ◽  
Игорь Ткачев ◽  
Igor' Tkachev
Keyword(s):  
Intermediate Layer ◽  
Pile Foundation ◽  
Steep Slope ◽  
Practical Implementation ◽  
Construction Process ◽  
Seismic Region ◽  
High Rise ◽  
High Rise Building ◽  
Steep Slopes ◽  
High Seismicity

The article performs example of practical implementation of raft-pile foundation with an intermediate layer as a foundation for high-rise building located on a steep slope in a seismic region.

scholarly journals Research on the Influence Mechanism of the High-Steep Slope on the Deformation Characteristics of Bridge Substructure

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yufang Zhang ◽  
Hongyu Liu ◽  
Jian Li ◽  
Jiaming Li ◽  
Qidi Huang ◽  
...  
Keyword(s):  
Pile Foundation ◽  
Lateral Displacement ◽  
Traction Force ◽  
Steep Slope ◽  
Bridge Pier ◽  
Deformation Characteristics ◽  
Bridge Structure ◽  
Influence Mechanism ◽  
Stress And Deformation ◽  
Bridge Pile Foundation

With the development of the Chinese railway, the high-steep slope is irreversible to be faced; especially under severe conditions such as heavy rainfall and earthquake, this kind of slope is prone to geological disasters, which seriously affects the safety and stability of the bridge substructure. Aiming to this, long-term monitorization and numerical analysis were carried out in this research, and the influence mechanism of the high-steep slopes on the stress and deformation characteristics of the bridge structure was studied. The research results show that under the effect of rainfall and earthquake, the original stress balance in the high-steep slope is broken, and the possibility of landslide thrust increases; under the comprehensive impact of residual landslide thrust, traction force at slope foot, vertical gravity of bridge slab and vehicle, and the bridge cap will deform. Besides, the deformation of the bridge pier exceeds the allowable lateral displacement of the top of the bridge pier, reaching 111.7%∼112.4% of the limit, which seriously affects the stability of the bridge structure and the safety of the railway service. Therefore, by increasing the support strength of the slope foot and the diameter of the bridge pile foundation, the traction force of the slope foot can be reduced, and the sliding resistance of the bridge pile foundation can be improved so as the safety of the bridge structure can be promoted.

Sign in / Sign up

Export Citation Format

Share Document