Application of Long-Short-Pile Composite Foundation of High-Rise Building in Soft Soil

2012 ◽  
Vol 256-259 ◽  
pp. 57-60
Author(s):  
Rong Fang Song ◽  
Ling Yun Lang ◽  
Jing Wang
Keyword(s):  
Bearing Capacity ◽  
Calculation Method ◽  
Design Method ◽  
Soft Soil ◽  
Composite Foundation ◽  
Soft Ground ◽  
Design Calculation ◽  
Actual Measurement ◽  
High Rise ◽  
High Rise Building

A case of the long-short-pile composite foundation in liquefied soft soil under a 30-storey high-rise building is presented, in which the long and short piles are made of cement-flyash-gravel (CFG) and lime. A new design calculation method of bearing capacity and settlement of composite foundation is introduced, and the calculated value is compared with the actual measurement. The results show that the liquefaction of soft ground is eliminated and the demand of load and settlement for upper building is met. At the same time, it is proved that the design method is feasible.

Study on Calculation Method of Reinforced Embankment Bearing Capacity Based on Landslide Equilibrium Method

2013 ◽  
Vol 671-674 ◽  
pp. 1240-1244
Author(s):  
Wen Xian Liu
Keyword(s):  
Bearing Capacity ◽  
Calculation Method ◽  
Composite Foundation ◽  
Soft Ground ◽  
Friction Resistance ◽  
Foundation Treatment ◽  
Slide Block ◽  
Equilibrium Method ◽  
Practical Engineering ◽  
Balance Analysis

Foundation treatment is necessary when the construction is built on soft ground; Reinforcing is superior to many other methods when embankment is built on soft ground. This paper adopts slide block balance analysis of the composite foundation bearing capacity consisting of the horizontal reinforced and discrete material pile, while considering the level friction resistance from the reinforcement and ground on the foundation bearing capacity influence. and it is applied to practical engineering. The results show that the method is feasible.

Research to build technological procedure for soft ground improvement using sea sand-cement-fly ash column

2020 ◽  
Vol 61 (HTCS6) ◽  
pp. 1-9
Author(s):  
Thinh Duc Ta ◽  
Phuc Dinh Hoang ◽  
Thang Anh Bui ◽  
Trang Huong Thi Ngo ◽  
Diu Thi Nguyen ◽  
...  
Keyword(s):  
Fly Ash ◽  
Load Capacity ◽  
Ground Improvement ◽  
Soft Soil ◽  
Soil Reinforcement ◽  
Soft Ground ◽  
Design Calculation ◽  
Sea Sand ◽  
Composite Ground ◽  
Soft Ground Improvement

Sea sand-cement-fly ash column technology for soft soil treatment is a new technology in the process of completing the theoretical basis, the experimental basis, and the construction of the ground treatment technological procedure. The paper presents the results of scientific research on design, calculation, construction, and acceptance of sea sand-cement-fly ash column. The scientific basis for the design of column is to consider the role of the column in composite ground, that is to use the column as soft ground improvement or soft soil reinforcement. The important parameters for the column design are: cement and fly ash content; column length; column diameter; number of columns; distance among columns; load capacity and settlement of composite ground. The sequence of steps of construction and acceptance of column includes: selection of construction equipment, preparation of construction sites, trial construction, official construction, evaluation of ground quality after treatment and preparation of document for acceptance.

scholarly journals Vertical and Lateral Bearing Capacity of FRP Composite Sheet Piles in Soft Soil

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Zhe Wang ◽  
Shuwei Wu ◽  
Kaiwen Weng ◽  
Wangjing Yao ◽  
Sifa Xu ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Soft Soil ◽  
Horizontal Displacement ◽  
Yangtze River Delta ◽  
Composite Foundation ◽  
Sheet Pile ◽  
Composite Sheet ◽  
Frp Composite ◽  
Vertical Bearing ◽  
Full Scale Tests

Fiber-reinforced polymer (FRP) composite sheet piles are usually favored for slope and river-retaining structures due to their construction and environmental efficiency. Their applications, however, have been hindered by the lack of understanding of the bearing capacity. This paper studies the vertical and lateral bearing capacity of FRP composite sheet piles through three full-scale tests conducted in Haiyan, a soft soil site in the Yangtze River Delta of China. In the three tests, we measured the vertical bearing capacity of the FRP composite sheet piles, the bearing capacity of the composite foundation, and the lateral capacity of the FRP composite sheet piles, respectively. The test results show that the Q-S (load on the top of the pile versus settlement) curve of the FRP composite sheet piles exhibits a steep fall while that of the composite foundation is relatively flat. Moreover, the ultimate bearing capacity of the FRP composite sheet piles is measured to reach 23.8 kN while that of the composite foundation increases by 47.1 %, reaching 35.0 kN. It shows that the FRP composite sheet piles under the composite foundation have a favorable bearing performance. Finally, the final horizontal displacement of the FRP composite sheet pile in the reinforced area with anchoring the sheet pile is smaller than the final horizontal displacement in the nonreinforced area, indicating that the horizontal bearing capacity can be significantly improved by anchoring the sheet pile.

Step by Step Calculation and Application of Multi-Type-Pile Composite Foundation

2012 ◽  
Vol 170-173 ◽  
pp. 252-255
Author(s):  
Xiao Hui Mao ◽  
Qiang Yue
Keyword(s):  
Bearing Capacity ◽  
Load Transfer ◽  
Composite Foundation ◽  
Frame Structure ◽  
Single Type ◽  
High Rise ◽  
Construction Methods ◽  
Rigid Pile ◽  
Capacity Improvement ◽  
Gravel Pile

The flexible pile and the rigid pile, the gravel pile and CFG pile are arranged in a group as compound piles, which utilize their merits and avoid their shortcomings. Based on the study of the existing calculation methods for the bearing capacity of multi-pile composite foundation, the working behavior of loaded multi-pile composite foundation and the general influence of different construction methods to the bearing capacity of the soil are considered. The coefficient of the bearing capacity exertion of master piles, the coefficient of the bearing capacity exertion of minor piles, the coefficient of the bearing capacity exertion of the soil between piles and the coefficient of the bearing capacity improvement of the soil are introduced. The new step-by-step calculation method for the bearing capacity of multi-pile composite foundation is put forward. Through designed a high-rise frame structure with multi-type-pile composite foundation, the results show that the multi-type-pile composite foundation is more whole and possess stronger capacity of load transfer compared with single-type-pile composite foundation. It can satisfy the requirements of load bearing capacity and deformation under special foundation conditions.

Design Research and Technical Application of the Multi-Type-Pile Composite Foundation

2012 ◽  
Vol 170-173 ◽  
pp. 110-114
Author(s):  
Yan Gao ◽  
Hui Min Li ◽  
Ji Ling Yao
Keyword(s):  
Bearing Capacity ◽  
Design Research ◽  
Composite Foundation ◽  
Social Benefits ◽  
Drilling Machine ◽  
Construction Technology ◽  
Practical Application ◽  
Technical Application ◽  
Foundation Soil ◽  
High Rise

Through project example, analysis of the multi-type-pile composite foundation (lime pile plus CFG pile) in the practical application of liquefied foundation of high-rise building, especially using the ZFZ construction technology which forwards formed a hole and reverses packed into a compaction pile by a long spiral drilling machine to eliminate liquefaction of foundation soil and improve the bearing capacity of foundation is very notable, in addition, it also produces good economic and social benefits, so it has great value of promotion and use.

scholarly journals EVALUATION AND ANALYSIS OF BEARING CAPACITY OF BORED PILES AND DEEP-LAID PILE-BARRETTE FOR A HIGH-RISE BUILDING ON LOOSE GROUNDS BASED ON CALCULATIONS AND FIELD TESTS

2018 ◽  
Vol 14 (2) ◽  
pp. 109-116 ◽  
Author(s):  
Rashid A. Mangushev ◽  
Nadezda S. Nikitina
Keyword(s):  
Bearing Capacity ◽  
Rectangular Cross Section ◽  
Standard Procedure ◽  
Field Tests ◽  
Thick Layer ◽  
Top Down ◽  
Field Methods ◽  
Static Tests ◽  
High Rise ◽  
High Rise Building

The study describes the standard procedure of the assessment of the bearing capacity of piles by field methods used in the Russian Federation. Basing on the example of an experimental deep-laid foundation pile (length L = 65 m, diameter D = 1.2 m) intended for a high-rise building designed for a thick layer of loose ground the study demonstrates the structure of a loading system on site and the results of static tests of piles in comparison with the results of analytical and numerical calculations. On the same construction site an experimental barrette-pile of rectangular cross-section measuring 3.3 x 1.1 with a length of 65 m was installed with the base in solid Protero­zoic clays. The pile test was carried out using Osterberg cells. For this purpose in the process of the installation of the pile strain gauges were mounted in its reinforcing cage at 9 levels. The test barrette-pile was carried out in two stages. On the first stage a standard test of the whole pile in the top-down direction was performed (Top - Down). On the second stage, after reaching the maximum possible load, the “O - cell” element test was performed trans­mitting the load in two directions (up and down). “O - cell” was located at a depth of 50 m in the layer of blue- stone. The article contains the graphs of the movements of pile from under the load applied on the first and second stages of the tests and the general assessment of the load-bearing capacity of the barrette-piles by different methods

Study on Seismic Design of Complex High-Rise Building

2014 ◽  
Vol 584-586 ◽  
pp. 1841-1844
Author(s):  
Fang Fang Yang
Keyword(s):  
Engineering Design ◽  
Seismic Performance ◽  
Seismic Design ◽  
Design Principle ◽  
Complex Shape ◽  
Design Method ◽  
High Rise ◽  
High Rise Building ◽  
Traditional Design

Super high-rise building seismic design of complex shape is very important, can not be carried out according to the traditional design method. This paper gives a design principle based on behavior, it in the engineering design and more attention. Method based on behavior on the properties of reaction structures under earthquake is evaluated. High-rise buildings must be based on the method of state to confirm that the building to meet seismic performance.

Study on the Design Method of Different Thickness-Diameter Ratios for Composite Foundation with Rigid Long and Short Piles

2014 ◽  
Vol 580-583 ◽  
pp. 723-728
Author(s):  
Jian Xing Tong ◽  
Xun Hai Sun ◽  
Peng Fei Luo ◽  
Ning Jia ◽  
Xin Hui Yang ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Traditional Method ◽  
Design Method ◽  
Diameter Ratio ◽  
Composite Foundation ◽  
Pile Diameter ◽  
Different Thickness ◽  
Equal Thickness

Composite foundation can be designed as long and short piles that lie on different bearing strata with high bearing capacities. Researches have shown that for foundation with sufficient stiffness, the ratio of the thickness of cushion to pile diameter (thickness-diameter ratio) plays an important role on the exertion of bearing capacities of pile and soil between piles. Traditional method just applies equal thickness-diameter ratio to design composite foundation with long and short piles, which hinders the exertion of bearing capacity of composite foundation. To overcome this defect, this paper studies the relations between thickness-diameter ratio and the exertions of bearing capacities of pile and soil between piles. The design method of thickness-diameter ratio for composite foundation with long and short piles is also proposed in this study.

Analysis of Bearing Capacity for Quicklime Compaction Pile Composite Foundation

2013 ◽  
Vol 671-674 ◽  
pp. 10-13 ◽  
Author(s):  
Yong Qiang He ◽  
Bin Can Liu ◽  
Bao Ping Jiao ◽  
Ji Zhong Gan
Keyword(s):  
Bearing Capacity ◽  
Influencing Factors ◽  
Calculation Method ◽  
Soil Compaction ◽  
Composite Foundation ◽  
Reliability Design ◽  
Collapsible Loess ◽  
Practical Engineering

In the collapsible loess of Midwest China, quicklime compaction pile composite foundation has been widely used in practical engineering. Firstly，the calculation method of quicklime compaction pile composite foundation is analyzed; then the influencing factors of bearing capacity for quicklime compaction pile composite foundation was researched on the basis of the character about soil compaction effect between piles with the quicklime expanding when absorbing water from the soil; lastly, the calculation method was used in practical engineering, the results can be used to reference in reliability design application of composite foundation.

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