Abstract
Abstract. The report displays the characteristics of sedimentary environments, consolidation and consolidation settlements of the late Pleistocene–Holocene deposits in the Mekong Delta (MD) and Ho Chi Minh City (HCMC), Vietnam. The report furthermore discusses the influences of sedimentary environments on the consolidation properties and the resulting complex and large consolidation settlements. They cause land subsidence and uneven settlements of foundations in HCMC and the MD. They have especially combined with the unsuitable plans, land use like land fill in the lower land, rivers and ponds in the delta and increase in sea level by the global climatic change. As a result, it is very difficult to improve waterlogged areas in HCMC and the MD by the rain and tide waters. It is also not easy to propose a standard strategy for the management, planning and construction of these areas.
Highlights
The Mekong Delta (MD), the largest delta in Vietnam, is located in southern Vietnam
The constant rate of strain (CRS) consolidation tests (JGS, 2000) were conducted on typical soil samples, which were obtained from each facies
The basic geotechnical properties (Head, 1985a) and unconfined compressive (UC) tests were conducted for both the undisturbed clay and the remolded clay to obtain the sensitivity, St
Summary
The Mekong Delta (MD), the largest delta in Vietnam, is located in southern Vietnam. The hydrology regimes in the MD and Ho Chi Minh City (HCMC) are influenced by the Mekong River system and by the Sai Gon and Dong Nai river systems, respectively, while the lower parts of both areas are significantly influenced by the East Sea (Fig. 1). The ageing has a very important role in developing the microfabric of clay, increasing the resistance to the compression, and this resistance does not depend on the volume reduction due to creep. He suggested that the ratio of the intrinsic swelling index, Cs∗, to the undisturbed swelling index, Cs, Published by Copernicus Publications on behalf of the International Association of Hydrological Sciences. Each sedimentary facies would be expected to possess typical consolidation properties which would result in different consolidation settlements. This hypothesis is analyzed in this article
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