Design and Application of Curved Pipe Jacking Launchers

doi:10.16183/j.cnki.jsjtu.2023.S1.06

Abstract

Abstract:

As an important part of the integral salvage “Yangtze River Estuary II”, several curved beam sections had to be jacked through the soil around the wreck to form a bottom bracket to wrap the wreck. The curved beam sections are different in structure, construction method, and guidance from the traditional linear bottom brackets in integral salvage. Therefore, special construction equipment had to be developed and used. The curved pipe jacking launcher, as a special device for jacking through curved beam pipe joints, has successfully completed the salvage of “Yangtze River Estuary II” after preliminary scaled-down model demonstration, design and manufacture, isometric test and re-optimisation design and manufacture. The design and the application of the method can be applied to offshore salvage and in-situ protection of the foundation of the ancient relics.

Key words: salvage, pipe curtain method, pipe jacking, curved pipe jacking

CLC Number:

YUAN Weihao, LI Yanlong, ZHANG Chi, ZHOU Dongrong, HU Jian, WANG Yu. Design and Application of Curved Pipe Jacking Launchers[J]. Journal of Shanghai Jiao Tong University, 2023, 57(S1): 124-130.

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外尺寸				内尺寸
外径	内径	截面尺寸		外径	内径	截面尺寸
9000	7000	3500×2000		8673	7327	2720×1346

位置	2 MN顶穿反力		4 MN顶穿反力
位置	最大应力/ MPa	最大位移/ mm	最大应力/ MPa	最大位移/ mm
0°	298	1.5	310	6
45°	198	5.7	299	10
90°	199	6.7	300	16.34
135°	290	3.6	315	8

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