Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 / The New York Tunnel Extension of the Pennsylvania Railroad. / The North River Tunnels. Paper No. 1155

by Bertram Henry Majendie Hewett; W. L. Brown

[U] Including bolting time.

TABLE 26.— Shield-Driven Tunnel Work, Weehawken Shaft, River Tunnel North. Table showing the size of the gang, the amount of excavation, and the time per ring taken for the various operations involved in building tunnel through the several kinds of ground encountered; also the extent and nature of all the unavoidable delays.

Weight of iron	Section between rings	Description				Ave. No. of Men in Gang					Av. No. of cu. yd. per ring	Time Mucking, per cu. yd.	Av. Time per ring, shoving and mucking	Time for Jacks	Time for Ring Erection, Hrs. and Min.					Bolting Time, Whole Time on Bolts After Ring is Complete.					Time lost repairing hydraulic piping	Total Time.
		Length in feet	Material	Ave air Pressure	Method of Excavation	Shield	Drilling	Grouting	Air trans	Total					Straight	Bore 1	Bore 2	Taper	Mean	Straight	Bore 1	Bore 2	Taper	Mean		Straight	Bore 1	Bore 2	Taper	Mean
						A	B	C	D		E			F	G	G	G	G	G	H	H	H	H	H
Ordinary	1-24	60.0	Rock	0	[X]	9	.04	0	0	10	46	0-06	4-32	Time for jacks for light iron is included in shoving and mucking.	6-23				6-23	Excavation partially completed previously.						10-55				10-55
	25-55	77.5	"	20	[X]	14	5	0.5	1	21	46	0-51	39-33		4-25			5-10	4-29							43-58			44-43	44-02
	56-72	42.5	Mixed sand and rock	10	[X]Breasting	22	2	.09	2	26	44	0-21	15-05		2-53	3-15			2-55						0-04	18-02			18-24	18-04
	73-165	232.5	Sand and gravel	10	[X] "	22	0	0.1	2	24	39	0-11	6-56		2-27			2-21	2-26	Bolting time for light iron is included in erection.					0-09	9-32			9-26	9-31
	166-184	47.5	Sand and silt with piles	20	[X] Breasting and cutting piles	22	0	.38	3	25	42	0-09	6-19		2-31	J	J	6-30	2-37						0-07	8-57			12-56	9-03
	185-253	172.5	Silt and piles	24		23	0	.71	3	26	43	0-09	6-13		1-57	2-44	2-52	2-00	2-15						0-15	8-25	9-12	9-20	8-28	8-43
	254-293	100.0	Silt	26	[Y]8 doors	22	0	0	3	25	6	0-18	1-45		1-58	1-57	2-15	2-45	2-02						0-14	3-57	3-56	4-14	4-44	4-01
	294-301	20.0	"	27		19	0	0	2	21	0	1-08			0-58	1-45	1-50		1-17							2-06	2-53	2-58		2-25
	302-307	15.0	"	27	[Y]8 doors	21	0	0	2	23	26	0-09	4-03		2-20	1-40	1-55	2-57	2-22							6-23	5-43	5-58	7-00	6-25
	308-342	87.5	"	28		19	0	0	2	21	0	0	0-36		2-00	1-34	2-42	1-58	2-02							2-36	2-10	3-18	2-29	2-38
	343-347	12.5	"	28	[Y]8 doors	15	0	0	2	17	2	0-36	1-11		2-15	2-20		2-43	2-33						0-39	4-05	4-10		4-43	4-23
	348-459	280.0	"	28		20	0	0	3	23	0	0	0-33		2-03	2-04	2-09	2-23	2-06						0-14	2-50	2-51	2-56	3-10	2-53
	460-494	87.5	"	28	[Y]8 doors	21	0	0	3	24	9	0-09	1-23		2-49	2-30	2-50	1-50	2-38						0-27	4-39	4-20	4-40	3-40	4-28
	495-513	47.5	"	28	8 "	23	0	0	4	27	17	0-05	1-28		2-35	2-23	1-55	2-10	2-26							4-03	3-51	3-23	3-38	3-54
	514-605	230.0	"	28	8 "	25	0	0	4	29	26	0-04	1-44		2-12	2-34	2-29	2-15	2-19							3-56	4-18	4-13	3-59	4-03
	606-624	47.5	"	28	8 "	24	0	0	4	28	16	0-04	1-07		1-54	2-33	2-16	1-35	2-04							3-01	3-40	3-23	2-42	3-11
	625-640	40.0	"	28	8 "	38	0	0	5	43	24	0-03	1-13		2-14	2-55	2-35	2-46	2-28							3-27	4-08	3-48	3-59	3-41
	25-640	1,540.0		20
	185-640	1,140.0		26		23	0	0.2	3	26	16	0-07	1-58	[V]	2-07	2-19	2-26	2-15	2-13						0-09	4-14	4-26	4-33	4-22	4-20
Heavy	641-647	17.5	Silt	28	[Y]8 doors	24	0	0	6	30	19	0-04	0-08	[V]	1-20	2-08	1-65	1-40	1-41	0-40	0-35	1-25	0-55	0-47		3-08	3-51	4-28	3-43	3-36
	648-751	260.0	"	28	[Y]8 "	22	0	0	4	26	14	0-03	0-36	0-12	1-21	1-22	1-26	1-55	1-23	0-31	0-29	0-38	0-30	0-32	0-12	2-52	2-51	3-04	3-25	2-55
	752-795	110.0	"	28	[Y]8 "	18	0	0	7	25	10	0-03	0-29	0-14	0-46	1-25	1-31	2-37	1-10	0-48	0-31	0-44	0-35	0-43	0-05	2-22	2-44	3-03	4-00	2-41
	796-825	75.0	"	28	[Y]8 "	19	0	0	10	28	5	0-08	0-40	0-11	0-48	1-31	1-34	0-53	1-03	0-31	1-03	0-49	3-27	0-51		2-10	3-25	3-14	5-11	2-45
	826-854	72.5	"	28	[Y]8 "	17	0	0	3	20	15	0-03	0-48	0-19	0-54	1-12	1-02	1-23	1-01	0-22	0-37	0-38	0-20	0-27	0-06	2-29	3-02	2-53	2-56	2-41
	855-881	67.5	"	28	[Y]8 "	23	0	0	9	32	7	0-05	0-33	0-16	0-59	0-45	1-15	1-20	1-01	0-22	0-21	0-45	0-40	0-26	0-45	2-55	2-40	3-34	3-34	3-01
	882-982	252.5	"	28	[Y]8 "	20	0	0	8	28	10	0-02	0-20	0-14	0-49	1-02	1-01	0-50	0-54	0-41	0-36	0-36	0-15	0-39	0-12	2-16	2-24	2-23	1-51	2-19
	983-990	20.0	"	28	[Y]8 "	21	0	0	7	28	17	0-02	0-34	0-14	0-40	0-40	0-48		0-44	1-15	0-15	0-28		0-48		2-43	1-43	2-04		2-20
	991-1,049	147.5	"	28	[Y]8 "	23	0	0	7	30	8	0-03	0-21	0-11	0-40	0-48	0-39		0-41	0-41	0-34	0-55		0-41		1-53	1-54	2-06		1-54
	1,050-1,074	62.5	"	28	[Y]8 "	24	0	0	9	33	7	0-03	0-18	0-10	0-43	0-44	0-46	0-40	0-43	0-35	1-15	0-07	0-35	0-48	0-04	1-50	2-31	2-25	1-47	2-03
	1,075-1,110	90.0	"	28	[Y]8 "	25	0	0	10	35	16	0-02	0-33	0-12	0-50	1-02	1-06	0-58	0-55	0-35	0-46	0-58	2-10	0-41	0-21	2-31	2-54	2-10	4-14	2-42
	641-1,110	1,175.0		28		21	0	0	7	28	8	0-04	0-30	0-14	0-56	1-08	1-12	1-29	1-02	0-36	0-36	0-44	0-54	6-38	0-11	2-27	2-27	2-51	3-18	2-35
All	185-1,110	2,315.0		28		22	0	0.1	5	27	12	0-07	1-20	0[V]	1-48	2-01	2-11	2-17	1-56	[W]					0-10	3-18	3-31	3-41	3-47	3-26
	25-1,110	2,715.0		26		21	0.1	0.1	3	24	17.1	0-12	3-13	[V]					2-05	[W]					0-09					5-27

SUMMARY

Weight of iron	Section between rings	Description				Average No. of Men in Gang					Average No. of cubic yards per ring	Time mucking, per cubic yard	Average Time per Ring.				Unavoidable Delays (not Included in Average Time per Ring).
		Length in feet	Material	Ave. air Pressure	Method of Excavation	Shield	Drilling	Grouting	Air trans	Total			Shoving and mucking [V]	Erection [W]	Lost time	Total	Items	Time hrs min
Ordinary	1-24	60.0	Rock	0	[X]	9	.04	0	0	10	46	0-06	4-32	6-23	0-00	10-55	First bulkhead	132-00
	25-55	77.5	"	20	[X]	14	5	0.5	1	21	46	0-51	39-33	4-29	0-00	44-02	Second bulkhead	158-50
	56-72	42.5	Mixed sand and rock	10	[X]Breasting	22	2	.09	2	26	44	0-21	15-05	2-55	0-04	18-04	Grouting	240-00
	73-165	232.5	Sand & gravel	10	[X]Breasting	22	0	.1	2	24	39	0-11	6-56	2-26	0-09	9-31	Old cave-in	234-00
	166-184	47.5	Sand and silt with piles	20	[X]Breasting and cutting piles	22	0	.38	3	25	42	0-09	6-19	2-37	0-07	9-03	Shoving tube	128-00
	185-253	172.5	Silt w/ piles	24	[X]Breasting and cutting piles	23	0	.71	3	26	43	0-09	6-13	2-15	0-05	8-43	-	-
	254-640	110.0	Silt	26	[Y]Doors	22	0	0	3	25	11	0-07	1-13	2-20	0-08	3-41	Total	892-50
	25-640	1,540.0		20	[Y]Doors	21	0.3	.12	3	24	24	0-14	5-06	2-24	0-08	7-38	per ring	0-49
Hvy	641-1,110	1,175.0		28		21	0	0	7	28	8	0-04	0-44	1-40	0-11	2-35
All	25-1,110	2,715.0		26		21	0.1	0.1	3	24	17.1	0-12	3-13	3-05	0-09	5-27

[V] Including time for jacks.

[W] Including bolting time.

[X] Excavating ahead of shield.

[Y] Shoving shield into silt with ... doors open.