浅埋小净距隧道围岩压力计算与监测分析

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Abstract Based on the code for design of road tunnel(JTG D70–2004)，the analysis has been carried out on the rock pressure of shallow-buried twin tunnels with small spacing；and the calculated model and theoretical calculation of rock pressure have been put forward by considering the construction processes of twin tunnels. The distribution law and influence factors of tunnel rock pressure have been discussed through calculation examples；the unsymmetrical characteristic of rock pressure distribution in shallow-buried twin tunnels with small spacing is pointed out，i.e. the vertical contact pressure at the inner side of twin tunnels is greater than that at the outer side，while lateral contact pressure at the inner side is less than that at the outer side. Meanwhile，the comparison analysis has been made between theoretical values from model and monitoring data from practical tunnel engineering. The results show that the calculated model and theoretical method proposed are rational and practicable. It is proposed that the unsymmetrical characteristic of rock pressure should be taken into account for the design of tunnel structure and support. The experience and conclusions can be referred to the analysis of rock pressure and the design of tunnel structure.

Key words： tunnelling engineering small spacing tunnels rock pressure shallow-buried theoretical calculation field measurement

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	Articles by authors
	GONG Jianwu1
	XIA Caichu2
	LEI Xuewen1

Cite this article:

GONG Jianwu1,XIA Caichu2,LEI Xuewen1. ANALYSIS OF FIELD MEASUREMENT AND THEORETICAL CALCULATION ON ROCK PRESSURE IN SHALLOW-BURIED TWIN TUNNELS WITH SMALL SPACING[J]. , 2010, 29(S2): 4139-4145.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4139

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