TS. Trịnh Việt Cường, KS. Nguyễn Ngọc Thuyết, ThS. Nguyễn Văn Đông
Kinh nghiệm áp dụng giải pháp móng nổi cho công trình xây dựng trên nền đất yếu tại dự án khu nhà ở Bắc Hà, Hà Nội, download
ThS. Nguyễn Đức Lý, GS.TSKH. Nguyễn Thanh
Tai biến trượt lở đất đá trên sườn dốc đường giao thông vùng miền núi tỉnh Quảng Bình, download
ThS. Nguyễn Duy Hiếu, ThS. Trương Thị Kim Xuân, GS. TSKH.Phùng Văn Lự, TS. Trần Bá Việt
Nghiên cứu sự làm việc của tấm sàn bê tông Keramzit dưới tải trọng phân bố đều, download
ThS. Nguyễn Văn Tú, GS. TSKH. Nguyễn Văn Hợi
Tính toán động lực học khung phẳng đàn – dẻo có kể đến các điều kiện ban đầu do các tác dụng tĩnh gây ra, download
CN. Hoàng Ngọc Hiệp, TS. Trần Minh Đức
Nghiên cứu vữa dầu rái, download
TS. Nguyễn Thị Bích Thủy
Nghiên cứu chế tạo sơn bảo vệ bê tông cốt thép ở khu vực biển, download
TS. Ngô Văn Hợi
Đánh giá độ cố kết của đất yếu thông qua các kết quả quan trắc lún bàng phương pháp trắc địa, download
KS. Ngô Xuân Thế, ThS. Lê Văn Hùng, KS. Nguyễn Xuân Hòa
Xây dựng phần mềm tính chuyển tọa độ GPS về hệ tọa độ phẳng công trình, download
PGS. TS. Nguyễn Bá Kế
Bài học từ sự cố sập đổ Viện Khoa học xã hội vùng Nam bộ ở thành phố Hồ Chí Minh, download
ABSTRACT
An experience on the application of floating foundation on soft soils for houses at Bac Ha dwelling project, Hanoi (pp. 3 - 7)
Dr. TRINH VIET CUONG, Eng. NGUYEN NGOC THUYET, MEng. NGUYEN VAN DONG
Floating foundations have been applied for many constructions in different countries. The principle of the method is placing a structure having a load equivalent to the weight of the excavated soil. In this condition, there are little changes in the state of the stress in the ground and the settlement of the structure can be reduced although no improvement methods are applied to the ground under foundation. In comparison with common foundations, this foundation method is effective when the thickness of the soft soil is high. The experience from application of floating foundation for houses at BAC HA dwelling project showed that this foundation method allowed a save of 40¸50% of construction cost in comparison with pile foundations.
Slope landslides on the transport roads in mountainous area of Quang Binh province (pp.8-16)
MEng. NGUYEN DUC LY, Prof. Dr. Sc. NGUYEN THANH
During the recent time, there occur the slope landslide hazards on many roads in mountainous areas of Quang Binh, notably in the flood season. The landslide occurrence has causes traffic jam and the commodity circulation as well as destruction of plenty road sections and transport works which in the end bring about great socio-economic losses.
This article introduces the most recent research results on the slope landslides on the transport roads in mountainous areas of Quang Binh province.
A study on structural performance of keramzit concrete floor under uniform load (pp.17-20)
MEng. NGUYEN DUY HIEU, MEng. TRUONG THI KIM XUAN, Prof. Dr. Sc.PHUNG VAN LU, Dr. TRAN BA VIET
Using keramzit concrete in construction brings economic and technical efficiency by creating huge reduction of the construction's weight, reduction of thermal conductilvity, sound conductivity and permeability for the structure [3][4][5]. However, keramzit concrete has some features which are different compared to normal-weighted concrete so it's necessary to study, test and evaluate the working of keramzit concrete under pressure with specific functions. This article shows the experimential result of the working of floor slabs made from keramzit concrete and normal-weight concrete, under equally-distributed pressure, comparison of the strain and its crack.
Key words: Keramzit concrete; Reinforced keramzit concrete slabs; Reinforced normal-weight concrete slabs; Pulled strain; Pressured strain ; Deflection; Crack.
The Dynamic Calculation of Elasto – Plastic Planar Frames Considered Structural Initial Conditions due to Static Actions Caused (pp.21-27)
MEng. NGUYEN VAN TU, Prof. Dr. Sc. NGUYEN VAN HOI
The paper presents methods and results on the computation of elasto – plastic planar frames subjected to dynamic loads with consideration of structural initial conditions due to static actions caused. Elasto – plastic model of material was used that is bilinear elasto – plastic model. In calculation model of structures, in addition to the above factors, also has to consider of effect of axial load for limit plastic momen and geometric nonlinearity of structures. Non-linear motional equation of structures was established by finite element method and solved by Newmark method combined with modified Newton – Raphson method. Based on the obtained algorithms, the authors has programmed computational program and researched the influence of the calculating parameters for displacement – internal force state of structures.
A study on dipterocarpus alatus roxb oil mortar (pp.28-33)
Ba. HOANG NGOC HIEP, Dr. TRAN MINH DUC
Dipterocarpus Latex used in ancient building in Vietnam as special ciment for long time in the past. Today there are rarely scientific works on this special building material. Some reseach results about Dipterocarpus latex grout are presented in this paper.
Preperation of Protective Coatings for Steel Reinforced Concrete in Marine Environment (pp.34-39)
Dr. NGUYEN THI BICH THUY
To gain suitable composition of coatings for steel reinforced concrete in marine environment, optimal content of additives such as CaCO3 and SiO2 has been obtained by mechano-physical and electrochemical methods. The therefrom formulated coatings based on epoxy (EP), polyurethane (PU) and acrylic (AC) resins exhibit good physical, mechano-physical and corrosion protection properties and meet all requirements of coating specification in the Transportation Sector.
Estimation of soil’s cosolidation by settlement monitoring with surveying method (pp.40-43)
Dr. NGO VAN HOI
A number of methods can be used to verify the soil’s consolidation in the process of soil improvement, among them the surveying method is considered as the most simple and effective. This paper presents the procedure of settlement monitoring for verification of effectiveness of soil improvement by determining the consolidation of soil to be improved. The procedure has been illustrated by the result of insitu monitoring carried - out by IBST in 2004 at the Chua Ve Container Terminal, Hai Phong Port Rehabilitation Project.
Construction software transfer calculation GPS coordinates coordinate systemflat on works (pp.44-48)
Eng. NGO XUAN THE, MEng. LE VAN HUNG, Eng. NGUYEN XUAN HOA
Nowadays in Construction surveying, GPS technology is being widely used, particularly for setting up the co-ordinate and altitude control network for construction.. However, because GPS measurements are space values and the ground surface of the surveyed ladn area does not comply with any matematical rule, there has been always a difference of distance between measuring values given by GPS and that given by the total station.. Therefore, to resolve this problem, the transformation of GPS co-ordinate system to the co-ordinate system of the building in order to homogenize the measuring values given by GPS and that given by the total station must be caried out. In this paper, the author presents the way for transforming the co-ordinate system mentioned above..
The lesson from the collapse of the building of Institute of Social Sciences, Southern Region in Ho Chi Minh city (pp.49-57)
A/Prof. Dr. NGUYEN BA KE
This paper presents important steps to investigate and analyze a real collapse of the basement construction in Vietnam. Some useful lessons and solutions for the bottom-up method of construction for the basement are drawn from this collapse.