LINE A, MANHATTAN.

--------------+-----------------+-------------------+-------------------------+

| | Station: | Date: |

| |---------+---------+------------+------------+

| | | | | |

Material. | Method. | From | To | From | To |

--------------+-----------------+---------+---------+------------+------------+

{|Top heading |108+43 |107+74 |July 20, '05|Aug. 3, '05|

Rock {|Top lift of bench|108+43 |107+74 |Aug. 8, '05|Aug. 23, '05|

{|Bottom lift of |108+43 |107+74 |Aug. 30, '05|Sept 27, '05|

{| bench | | | | |

| | | | | |

Rock {|Bottom heading |107+74 |107+21 |Sept 27, '05|Oct. 23, '05|

{|Bottom heading |107+74 |107+21 |Nov. 30, '05|Dec. 29, '05|

| | | | | |

Mixed |Bottom heading |107+21 |106+99 |Oct. 26, '06|Nov. 20, '06|

| | | | | |

Mixed |Rock bench |106+99 |106+34 |Nov. 20, '06|Jan. 13, '07|

| | | | | |

Earth |Poling and |106+34 | 99+11 |Jan. 13, '07|Apr. 17, '07|

| breasting | | | | |

| | | | | |

Mixed |Rock cut | 99+11 | 93+96 |Apr. 17, '07|Oct. 24, '07|

| | | | | |

Rock |Bottom heading | 93+96 | 93+58 |Oct. 24, '07|Nov. 14, '07|

| | | | | |

Rock |Center heading | 93+58 | 92+42 |Nov. 14, '07|Dec. 27, '07|

| | | | | |

Rock |Bottom heading | 92+42 | 91+05 |Dec. 27, '07|Feb. 24, '08|

| | | | | |

Mixed |Rock cut | 91+05 | 90+57 |Feb. 24, '08|Mar. 20, '08|

--------------+-----------------+---------+---------+------------+------------+

--------------+------+--------+--------+--------------------------------------+

| | |Rate of | |

|Number| |progress| |

| of | Linear |in feet | |

Material. | days.| feet. |per day.| Remarks |

--------------+------+--------+--------+--------------------------------------+

{| 14} | | {|Excavation in normal air, and before |

Rock {| 15}57| 69 | 1.21 {|advance of shield. |

{| 28} | | {| |

{| | | {| |

| | | | |

Rock {| 26}55| 53 | 0.96 {|Bottom heading timbered to avoid the |

{| 29} | | {|possibility of a break. |

| | | | |

Mixed | 25 | 22 | 0.88 |Bottom heading timbered. |

| | | | |

Mixed | 54 | 65 | 1.20 | |

| | | | |

Earth | 94 | 723 | 7.69 | |

| | | | |

| | | | |

Mixed |190 | 515 | 2.71 | |

| | | | |

Rock | 21 | 38 | 1.81 | |

| | | | |

Rock | 46 | 116 | 2.52 | |

| | | | |

Rock | 59 | 137 | 2.32 | |

| | | | |

Mixed | 25 | 48 | 1.92 | |

--------------+------+--------+--------+--------------------------------------+

LINE B, MANHATTAN.

--------------+-----------------+-------------------+-------------------------+

| | Station: | Date: |

| |---------+---------+------------+------------+

| | | | | |

Material. | Method. | From | To | From | To |

--------------+-----------------+---------+---------+------------+------------+

{|Top heading |108+35 |107+87 |July 6, '05|July 27, '05|

{|Top lift of bench|108+35 |107+87 |Aug. 3, '05|Aug. 14, '05|

Rock {|Bottom lift of | | | | |

{| bench |108+35 |108+15 |Aug. 26, '05|Aug. 30, '05|

{|Bottom lift of | | | | |

{| bench |108+15 |107+87 |Sept 11, '05|Sept 26, '05|

| | | | | |

Rock |Bottom heading |107+87 |107+00 |Oct. 23, '05|Jan. 17, '06|

| | | | | |

Mixed |Bottom heading |107+00 |106+64 |Jan. 17, '06|Feb. 12, '06|

| | | | | |

Mixed |Rock bench |106+64 |106+31 |Feb. 12, '06|Mar. 1, '06|

| | | | | |

Earth |Poling and |106+31 |105+58 |Mar. 1, '06|Apr. 3, '06|

| breasting | | | | |

| | | | | |

|Shutters in | | | | |

Earth | contact with |105+58 | 99+19 |Apr. 9, '06|Nov. 1, '06|

| face | | | | |

| | | | | |

Mixed |Rock bench | 99+19 | 98+44 |Nov. 1. '06|Dec. 29, '06|

| | | | | |

Mixed |Bottom heading | 98+44 | 97+76 |Dec, 29, '06|Feb. 12, '07|

| | | | | |

Mixed |Rock cut | 97+66 | 93+84 |Feb. 12, '07|Aug. 6, '07|

| | | | | |

Rock |Full face | 93+84 | 93+21 |Aug. 6, '07|Sept 2, '07|

| | | | | |

Rock |Center Heading | 93+21 | 92+30 |Sept 2, '07|Oct. 12, '07|

| | | | | |

Rock |Bottom heading | 92+30 | 90+99 |Oct. 12, '07|Dec. 6, '07|

| | | | | |

Mixed |Rock cut | 90+99 | 90+49.6 |Dec. 6, '07|Jan. 3, '08|

--------------+-----------------+---------+---------+------------+------------+

--------------+------+--------+--------+--------------------------------------+

| | |Rate of | |

|Number| |progress| |

| of | Linear |in feet | |

Material. | days.| feet. |per day.| Remarks |

--------------+------+--------+--------+--------------------------------------+

{| 21} | | {| |

{| 11} | | {| |

Rock {| }51| 48 | 0.94 {|Excavation done in normal air and |

{| 4} | | {|before advance of shield. |

{| } | | {| |

{| 15} | | {| |

| | | | |

Rock | 86 | 87 | 1.01 | |

| | | | |

Mixed | 26 | 36 | 1.38 | |

| | | | |

Mixed | 17 | 33 | 1.94 | |

| | | | |

Earth | | | | |

| 33 | 73 | 2.21 | |

| | | | |

| | | | |

Earth |206 | 639 | 3.10 | |

| | | | |

| | | | |

Mixed | 58 | 75 | 1.30 | |

| | | | |

Mixed | 45 | 68 | 1.51 | |

| | | | |

Mixed |175 | 392 | 2.24 | |

| | | | |

Rock | 27 | 63 | 2.33 | |

| | | | |

Rock | 40 | 91 | 2.28 | |

| | | | |

Rock | 55 | 131 | 2.38 | |

| | | | |

Mixed | 28 | 49.4 | 1.76 | |

--------------+------+--------+--------+--------------------------------------+

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Tunnels. Paper No. 1159 · 第 23 / 35 题