Design of the Muong Chuoi Barrier

Design of the Muong Chuoi Barrier

Van Vliegen, K.
Van Oorschot, N.
Meinen, N.
Van Dijk, S.
Reimert, Z.

Civil Engineering and Geosciences

Hydraulic Engineering and Structural Engineering

2013-09-05

Ho Chi Minh City has to deal with severe flooding in the rainy season. To prevent the city from this flooding, MARD set up plan 1547. The main idea of the plan is to build a ring dike around HCMC in combination with several movable tidal barriers. One of these barriers is the Muong Chuoi Barrier. In this report a conceptual design of the Muong Chuoi Barrier is made. The structure consists of a movable tidal barrier and a navigation lock, both able to bear the water in both directions. The navigation lock provides a possibility of vessels passing when the barrier is closed. In the preliminary research information is gained about the location properties, the soil conditions, the hydraulic conditions and the shipping class, which results in a basis of design. An analysis of diffrent gate and foundation types give a number of possible alternatives. Vietnamese unit prices are investigated and used to make a proper cost estimation of the different alternatives. The most important requirements from the basis of design are: the normative high water level, the water discharge of the Muong Chuoi river, the shipping class, the number of vessels passing every day and minimum life span of the structure. After a selection between all the possible solutions, that follow from the preliminary research, four alternatives are worked out, which are a combination between two gate types, a lifting gate and a radial gate, and two foundation types, a caisson foundation and foundation with combi wall and underwater concrete. By means of structural calculations, the quantities of the materials used are determined. Based on these results and the unit prices from the preliminary research, a cost estimation of every alternative is made. In the multi criteria analysis for the barrier, the most important factor are the costs, its weighing factor is 50%. Other criteria are: maintenance, constructability, usability and environmental impact. After the multi criteria analysis, the best alternative is alternative D, the radial gate in combination the combi wall foundation. The study of alternatives for the navigation lock focuses only on the lock head. Again a selection is made between the possible solutions that follow from the preliminary research. Four types are selected for the multi criteria analysis: mitre gates, single leaf gates, lifting gates and rolling or sliding gates. One of the most important criteria for the navigation lock are cost (35%). Also the usability (35%) is considered to be important, in particular the locking cycle and reliability. After the multi criteria analysis, the best alternative is the single leave gate. A conceptual design for the lock is created. The inner dimensions of the lock chamber are determined, the structural elements are designed and an structural calculation of the single leave gate is made.

Vietnam
Ho Chi Minh City
tidal barrier
codes

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