. Engineering and Contracting. iDcbUitgth of do«D*ard [iresaunUtlog dltTaccDtlall;not dlffetcmUUv 2,000 lb. 173 0001b206 000-. Tottlujiwird pfcsoro 02 000 .. rlLE SECTIONOTuall LccgtbN«tLcn«tbX>U<n«ter cf Pile 88IO BOTTOM VIEW AND SECTION Fig. 3—Details of Hydraulic Screwing Machines. February 2, 1910. ENGINEERING-CONTRACTING 103 as a support for the track. The 16-in. pipedid not prove efficient either as a carrier oras an anchorage. Figs 2 and 3 illustrate thegeneral arrangement and details of the ma-chine designed by the writer and used forsinking the test piles in the tun
. Engineering and Contracting. iDcbUitgth of do«D*ard [iresaunUtlog dltTaccDtlall;not dlffetcmUUv 2,000 lb. 173 0001b206 000-. Tottlujiwird pfcsoro 02 000 .. rlLE SECTIONOTuall LccgtbN«tLcn«tbX>U<n«ter cf Pile 88IO BOTTOM VIEW AND SECTION Fig. 3—Details of Hydraulic Screwing Machines. February 2, 1910. ENGINEERING-CONTRACTING 103 as a support for the track. The 16-in. pipedid not prove efficient either as a carrier oras an anchorage. Figs 2 and 3 illustrate thegeneral arrangement and details of the ma-chine designed by the writer and used forsinking the test piles in the tunnels. This ma-chine had been used originally on the New Jer-sey side on the test pile at Pier C, and the the pile-driver. Each boring was continued,and the depth of several was more than 250ft. below the surface of the water. The bor-ings on land were mostly core borings, and weregenerally made with the chilled shot boringmachine. Base lines, about 2,250 ft. in length, weremeasured on each side of the river, and ob- 4di. SECTION 190-fOO TERMINAL STATION WESTTYPICAL SECTIONS Fig. 4—Typical Sections of Terminal Station Excavation. adaption was not exactly as shown on thesedrawings, but if the screw-piles had beenplaced in the tunnels, the arrangement shownwould have been used. Surveys, soundings and borings were com-menced in the latter part of 1901 on an as-sumed center line of tunnels which was thecenter line of 32d St. extended westward. The soundings were made from a float stagefastened to a tugboat, the location being deter-mined by transit on shore and the elevationby measuring from the surface of the water,a tide gage being continually observed and thetime of soundings and gage readings kept. In the river wash-borings were made froma floating pile-driver on which was installed adiamond-drill outfit of rods, pump borings were completed in the difficulty was found in holdingthe pile-driver against the current, the ma-teri
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