Micro Disturbance Mechanism of Concrete Pipe-jacking with Slurry Pressure Control

doi:10.16183/j.cnki.jsjtu.2013.06.004

Abstract

Abstract:

A finite element model for theoretical analysis was established to study the effect of slurry pressure on soil deformation control during pipe-jacking construction. Based on the comparison of measured data and finite element results, the influences of pore pressure and soil deformation during the construction process were discussed. The soil disturbance around pipe-jacking with different slurry pressures was analyzed, based on which the concept of pore pressure change rate was proposed. Taking the results of soil deformation and disturbance analysis into consideration, it is suggested that in practical engineering, the slurry pressure should be 1.1 times the overlying earth pressure, which has less impacts on the surrounding environment. This conclusion can provide reference for future similar pipe-jacking constructions.

Key words: concrete pipe-jacking, slurry pressure, pore pressure change ratio, micro disturbance, finite element

CLC Number:

TU992

CONG Mao-qiang, CHEN Jin-jian, WANG Jian-hua. Micro Disturbance Mechanism of Concrete Pipe-jacking with Slurry Pressure Control[J]. Journal of Shanghai Jiao Tong University, 2013, 47(06): 867-871.

Figures/Tables 6

Fig. 1

Tab. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

References 8

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编号	土层名称	层厚／m	λ	κ	M	k／（μm·s^-1）	e
②₁	褐黄～灰黄色粉质黏土	2	0.048	0.004	0.635	3.0×10^-2	0.827
②₃	灰黄～灰色砂质粉土	3	0.027	0.002	1.217	5.0	0.816
③	灰色粉质黏土	3	0.096	0.008	0.530	3.0×10^-2	1.162
④	灰色淤泥质黏土	13	0.152	0.012	0.403	2.0×10^-3	1.416
⑤₁	灰色黏土	5	0.087	0.007	0.546	1.0×10^-2	1.135
⑥	暗绿色粉质黏土	2	0.030	0.002	0.590	3.0×10^-2	0.698
⑦¹	灰黄色砂质粉土	2	0.024	0.002	1.234	5.0	0.820

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