Discussion on Treatment Technology of Reinforcement Pile in Karst Area

2014 ◽  
Vol 580-583 ◽  
pp. 52-55
Author(s):  
Cheng Bo Zheng ◽  
Jie Xu
Keyword(s):  
Pile Foundation ◽  
Treatment Plan ◽  
Design Principles ◽  
Karst Area ◽  
Engineering Practice ◽  
Foundation Engineering ◽  
Construction Technology ◽  
Treatment Technology ◽  
Reinforcement Scheme ◽  
Reinforcement Design

With the example of pile foundation engineering in the limestone karst fissure reinforcement, discusses the principle of reinforcement of pile foundation in karst area, introduces some construction technology of pile foundation reinforcement, the reinforcement design principles and the reinforcement scheme is briefly discussed, and combined with the engineering practice and put forward a set of safety, economy and reasonable treatment plan, to reinforcement technology promote the karst pile foundation bottom cave, fracture.

Deepwater Pile Foundation Construction Technology of Xiaoyi Reservoir Bridge

2013 ◽  
Vol 405-408 ◽  
pp. 252-255
Author(s):  
Zhong Mei Li
Keyword(s):  
Pile Foundation ◽  
Steel Sheet ◽  
Engineering Practice ◽  
Construction Technology ◽  
Sheet Pile ◽  
Construction Scheme ◽  
Speed Up ◽  
Operation Platform ◽  
Construction Schedule

Construction of deepwater pile foundation is difficult and complex. By the example of Xiaoyi reservoir bridge, this paper introduces the construction scheme of the pier in the water, which is building temporary bridge and drilling platform. Field-operation platform and steel sheet pile cofferdam. Engineering practice proves that this construction scheme can speed up construction schedule, and can ensure the quality of construction, which offers mirrors and references for similar engineering.

Model Test on Negative Skin Friction for Super-Long Pile under Surcharge Load Considering Time Effect

2013 ◽  
Vol 470 ◽  
pp. 1105-1108
Author(s):  
Jian Wei Zhang ◽  
Zhi Long Wang ◽  
Dong Qin Qiao
Keyword(s):  
Skin Friction ◽  
Model Test ◽  
Pile Foundation ◽  
Great Influence ◽  
Relative Displacement ◽  
Time Effect ◽  
Engineering Practice ◽  
Foundation Engineering ◽  
Tip Resistance ◽  
Negative Friction

Super-long pile bridges and high-rise buildings are commonly used in the form of pile foundation. In the flood area, due mainly silt stratum, as well as the decline in groundwater mound pile under the conditions set out in the consolidation, there will be a negative pile skin friction and negative friction obvious time effect, which bearing capacity of the pile has a great influence. Current research on negative friction for super-long pile considering time effect is relatively little. In the model box, on the base of the super-long pile silt model test, set out in a pile mound under consolidation, soil testing flour gradually over time preloading consolidation settlement, pile-soil relative displacement, so as to arrive negative friction pile variation with time, tip resistance variation with time from the pile-axial force curve deduce the location of the neutral point and changes in circumstances, the pile foundation engineering practice has a certain significance.

Study on Weak-Disturbance Construction Technology of Casing Bored Pile

2012 ◽  
Vol 170-173 ◽  
pp. 3169-3174 ◽  
Author(s):  
Deng Ke Liu ◽  
Yao Dong Huang ◽  
Quan Mei Gong
Keyword(s):  
Pile Foundation ◽  
New Technology ◽  
Foundation Engineering ◽  
Construction Technology ◽  
Foundation Construction ◽  
Existing Structures ◽  
Bored Pile ◽  
Passenger Dedicated Line

Aiming at reducing the influence caused by the pile foundation construction on the existing structures nearby, this paper introduces a new technology of spinning casing bored pile, which is the optimization and combination of different construction technologies. Through the corresponding calculation and analysis, the influence scope and extent of this technology is obtained in this paper. This technology has been successfully applied in the pile foundation engineering of a passenger dedicated line close to subway shield tunnels, it can provide the similar project that needs to consider the influence on the surroundings with reference, and it is worth wide promotion and application.

scholarly journals Construction Treatment Technology for Cracks in Asphalt Pavement of Road and Bridge

2020 ◽  
Vol 198 ◽  
pp. 03013
Author(s):  
Yueshu Li
Keyword(s):  
Service Life ◽  
Influencing Factors ◽  
Road Traffic ◽  
Asphalt Pavement ◽  
Construction Technology ◽  
Treatment Technology ◽  
The Common

In recent years, with the development of road traffic in China, road and bridge projects have gradually increased. While the number of projects has increased sharply, construction technology has been greatly improved. The increase in the use of roads and bridges has led to an increase in the probability of cracks on the roads and bridges. Starting from the common types of cracks, this article explains how to effectively ensure the service life of roads and bridges, improve the performance of roads and bridges, avoid road cracks, deal with the cracks, and emphasize the influencing factors of cracks and the corresponding solutions for the reference of relevant personnel.

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.

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