Study on the Division of the Affected Zone under Construction Unloading and Its Construction Sequence of the Multiline Parallel River-Crossing Pipe Jacking

Table 5

Surrounding stratum critical clear distance D_min.

Hs (m)		1.0	2.0	3.0	4.0	5.0 m	6.0	7.0	8.0 m
(m)	2.0	1.00	1.18	1.52	2.00	2.64	3.60	4.25	5.80
	5.0	2.83	3.00	3.56	4.27	5.18	6.23	7.37	8.63
	8.0	—	—	5.71	6.84	7.86	9.09	10.24	11.92