Sediment consolidation settlement of Chengbei Sea area in the northern Huanghe River subaqueous delta, China

One of the most important factors controlling the morphology of the modem Huanghe （Yellow） River delta is consolidation settlement, which is impacted by fast deposition, high water content, and low density of seafloor sediment. Consolidation settlement of the Huanghe River subaqueous delta was studi...

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Bibliographic Details
Published inChinese journal of oceanology and limnology Vol. 35; no. 3; pp. 693 - 703
Main Author 刘杰 冯秀丽 刘潇
Format Journal Article
LanguageEnglish
Published Heidelberg Science Press 01.05.2017
Springer Nature B.V
Subjects
Boreholes
Brackish
China
Consolidation
Drilling
Drills
Earth and Environmental Science
Earth Sciences
Freshwater
Geology
Laboratory experimentation
Marine
Marine engineering
Mechanical properties
Moisture content
Morphology
Ocean floor
Oceanography
Physical properties
River basins
river deltas
Rivers
Sediment
Sedimentation & deposition
Sediments
Water content
一维固结理论
中国
北方
固结沉降
海域沉积物
物理力学性质
钻孔深度
黄河水下三角洲
China
Huanghe River
drill hole
consolidation settlement
modern Huanghe River subaqueous delta
mechanical properties
Online AccessGet full text
ISSN0254-4059
2096-5508
1993-5005
2523-3521
DOI10.1007/s00343-017-5365-5

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Summary:One of the most important factors controlling the morphology of the modem Huanghe （Yellow） River delta is consolidation settlement, which is impacted by fast deposition, high water content, and low density of seafloor sediment. Consolidation settlement of the Huanghe River subaqueous delta was studied based on field data, laboratory experiments on 12 drill holes, and the one-dimensional consolidation theory. Results show that vertical sediment characteristics varied greatly in the rapidly forming sedimentary bodies of the modem Huanghe River subaqueous delta. Sediments in the upper parts of drill holes were coarser than those in the deeper parts, and other physical and mechanical properties changed accordingly. On the basis of the one-dimensional consolidation theory and drilling depth, the final consolidation settlement of drill holes was between 0.6 m and 2.8 m, and the mean settlement of unit depth was at 1.5-3.5 cm/m. It takes about 15-20 years for the consolidation degree to reach 90% and the average sedimentation rate within the overlying 50 m strata was at 5 cm/a to 12 cm/a. This study helps to forecast the final consolidation settlement and settlement rate of the modem Huanghe River subaqueous delta, which provides key geotechnical information for marine engineers.
Bibliography:LIU Jie1, 2, FENG Xiuli 2, 3, LIU Xiao 2,4 （1 Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration （SOA）, Qingdao 266061, China ;2 Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China ;3 Key Lab of Submarine Geoscienees and Prospecting Techniques, Ocean University of China, Qingdao 266100, China ;4 College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China）
mechanical properties; consolidation settlement; drill hole; modem Huanghe River subaqueous delta
One of the most important factors controlling the morphology of the modem Huanghe （Yellow） River delta is consolidation settlement, which is impacted by fast deposition, high water content, and low density of seafloor sediment. Consolidation settlement of the Huanghe River subaqueous delta was studied based on field data, laboratory experiments on 12 drill holes, and the one-dimensional consolidation theory. Results show that vertical sediment characteristics varied greatly in the rapidly forming sedimentary bodies of the modem Huanghe River subaqueous delta. Sediments in the upper parts of drill holes were coarser than those in the deeper parts, and other physical and mechanical properties changed accordingly. On the basis of the one-dimensional consolidation theory and drilling depth, the final consolidation settlement of drill holes was between 0.6 m and 2.8 m, and the mean settlement of unit depth was at 1.5-3.5 cm/m. It takes about 15-20 years for the consolidation degree to reach 90% and the average sedimentation rate within the overlying 50 m strata was at 5 cm/a to 12 cm/a. This study helps to forecast the final consolidation settlement and settlement rate of the modem Huanghe River subaqueous delta, which provides key geotechnical information for marine engineers.
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ISSN:0254-4059
2096-5508
1993-5005
2523-3521
DOI:10.1007/s00343-017-5365-5