scholarly journals PILED RAFT - AN EFFECTIVE FOUNDATION DESIGN METHOD FOR HIGH-RISE BUILDINGS IN HO CHI MINH CITY, VIET NAM

2021 ◽  
Vol 21 (87) ◽  
Author(s):  
Kamol Amornfa
2009 ◽  
Vol 46 (2) ◽  
pp. 142-159 ◽  
Author(s):  
Ryuuichi Sonoda ◽  
Tatsunori Matsumoto ◽  
Pastsakorn Kitiyodom ◽  
Hideo Moritaka ◽  
Toshihiro Ono

A building and its foundation were constructed in sandy ground using a reverse construction method. The main difference between a reverse construction method and a conventional construction method is that the piles are cast in place and are partially loaded by the superstructure early during the construction process. It is only later that the raft (mat foundation) is constructed to combine with the piles to bear the full building load. Therefore, the foundation is regarded as a pile group in early stages of construction, while the foundation behaves as a piled raft after completion of the raft construction. A simple conservative design approach was used for the design of the foundation. To examine the validity of the design method, settlements of the foundation were observed during construction. The measured settlements were smaller than those predicted in the design stage, satisfying the design requirements for the building. Post-analysis of the deformation of the foundation was carried out using the results of the pile load test at the construction site, and the results of the analysis are compared with the observed settlements of the foundation, aiming at an improvement in pile foundation design.


2018 ◽  
Vol 14 (1) ◽  
pp. 6057-6061 ◽  
Author(s):  
Padmanaban M S ◽  
J Sreerambabu

A piled raft foundation consists of a thick concrete slab reinforced with steel which covers the entire contact area of the structure, in which the raft is supported by a group of piles or a number of individual piles. Bending moment on raft, differential and average settlement, pile and raft geometries are the influencing parameters of the piled raft foundation system. In this paper, a detailed review has been carried out on the issues on the raft foundation design. Also, the existing design procedure was explained.


Oryx ◽  
2021 ◽  
pp. 1-9
Author(s):  
Alegria Olmedo ◽  
Diogo Veríssimo ◽  
E.J. Milner-Gulland ◽  
Amy Hinsley ◽  
Huong Thi Thu Dao ◽  
...  

Abstract Pangolins have been exploited throughout history but evidence points to population declines across parts of their ranges since the 1960s, especially in Asia. This is the result of overexploitation for local use and international trade and trafficking of their derivatives. The prevalence of the consumption of pangolin products has been estimated for different localities in Viet Nam but, considering that national legislation prohibits the purchase of pangolin products, previous research has not accounted for the potential for biased responses. In this study, we treat pangolin consumption as a sensitive behaviour and estimate consumption prevalence of pangolin meat, scales and wine (a whole pangolin or pangolin parts or fluids soaked or mixed in rice wine) in Ho Chi Minh City using a specialized questioning method, the unmatched count technique. We also characterize the demographics of consumers. Our results suggest there is active consumption of all three pangolin products, with a best-estimate prevalence of 7% of a representative sample of Ho Chi Minh City residents for pangolin meat, 10% for scales and 6% for wine. Our prevalence estimates exceed estimates from direct questions, providing evidence for the sensitivity of pangolin consumption. We compared our analysis of consumer characteristics with existing profiles of pangolin consumers and found substantial differences, suggesting that consumption occurs among broader demographic groups than previously described. Our findings suggest that efforts to reduce demand for pangolin consumption in Viet Nam should focus on a broader range of consumers than previously identified.


2012 ◽  
Vol 2 (4) ◽  
pp. 181-185
Author(s):  
N. V. Tho ◽  
H. T. H. Loan ◽  
N. T. P. Thao ◽  
N. T. T. Dung ◽  
L. T. T. Lan

Author(s):  
PARAN MOYES ◽  
HARRY G POULOS ◽  
JOHN C. SMALL ◽  
FRANCES BADELOW

2017 ◽  
Vol 54 (10) ◽  
pp. 1408-1420 ◽  
Author(s):  
Y.F. Leung ◽  
A. Klar ◽  
K. Soga ◽  
N.A. Hoult

The full potential of pile optimization has not been realized as the interactions between superstructures and foundations, and the relationships between material usage and foundation performance are rarely investigated. This paper introduces an analysis and optimization approach for pile group and piled raft foundations, which allows coupling of superstructure stiffness with the foundation model, through a condensed matrix representing the flexural characteristics of the superstructure. This coupled approach is implemented within a multi-objective optimization algorithm, capable of providing a series of optimized pile configurations at various amounts of material. The approach is illustrated through two case studies. The first case involves evaluation of the coupled superstructure–foundation analyses against field measurements of a piled raft–supported building in London, UK. The potential benefits of pile optimization are also demonstrated through re-analyses of the foundation by the proposed optimization approach. In the second case, the effects of a soft storey on the superstructure–foundation interactions are investigated. These cases demonstrate the importance of properly considering the superstructure effects, especially when the building consists of stiff components such as concrete shear walls. The proposed approach also allows engineers to make informed decisions on the foundation design, depending on the specific project finances and performance requirements.


2020 ◽  
Vol 8 (2) ◽  
pp. 38-44
Author(s):  
Nguyen Van Minh ◽  
Mai Huu Phuc ◽  
Duong Nhat Linh ◽  
Tran Thi A Ni ◽  
Tran Kien Duc ◽  
...  

28 leaves and living-tissue samples of rubber tree (Hevea brasiliensis) were collected from Ho Chi Minh City, Binh Phuoc province and Binh Duong province (Viet Nam). We isolated and screened endophytes that have potential application as agents for biocontrol of Corticium salmonicolor, the agent of Pink Disease in rubber trees. As a result, 21 strains of endophytic bacteria and 14 strains of endophytic fungi were isolated. Antagonistic activity of the endophytes towards C. salmonicolor was checked by using a dual culture. Testing results showed that: T9, T15 and T16 strains have inhibited C. salmonicolor. T9 and T16 strains showed result that 100% of inhibiting C. salmonicolor at the concentration of 1:1. In the test of ability to kill C. salmonicolor, T9 and T16 strains showed that they could kill C. salmonicolor after 3 sprays of bacterial filtrate. T9 and T6 strains, which were identified by biochemical methods, have similar characteristics to Bacillus thuringiensis.


2020 ◽  
Vol 1 (37) ◽  
pp. 12-23
Author(s):  
Giao Khanh Nam Ha ◽  
Anh Diep Tram Huynh ◽  
Ngan Thi Kim Nguyen ◽  
Tung Son Nguyen ◽  
Phuc Pham Hanh Nguyen ◽  
...  

The research was conducted to determine the effects of psychological capital on the personality on hotel staff working in an engagement setting in Ho Chi Minh City, Viet Nam. Data was collected by surveying 378 staffs who are working in hotels in Ho Chi Minh City which are rated 3 stars or more. Descriptive analysis, exploratory factor analysis, and linear regression analysis were used with SPSS 20 statistical package for data analysis. The results show that all psychological capital factors, including hope, efficacy, resilience and optimism have hadpositive impacts on hotel staffs’ work ethic. The study also demonstrated the effects of personality on the hotel staffs’ engagement with their work. The research outcomes suggest some managerial solutions to management problems by adapting psychological capital data and to take into consideration the personality of staff to enhance employees  working in engagement settings in Ho Chi Minh City.


Sign in / Sign up

Export Citation Format

Share Document