Geology of Coal ; Examination of Coal Properties ; Drifts, Slopes, And Shafts ; Methods of Working
Geology of Coal ; Examination of Coal Properties ; Drifts, Slopes, And Shafts ; Methods of Working
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In our eReader you can find the full English version of the book. Read Geology of Coal ; Examination of Coal Properties ; Drifts, Slopes, And Shafts ; Methods of Working Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Geology of Coal ; Examination of Coal Properties ; Drifts, Slopes, And Shafts ; Methods of Working
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Where thicker beds of quicksand occur, it may be necessary to drive several series of piles, each successive series being driven inside the former after the material has been exca- vated to a point near the bottom of the first piles driven.
The second set of piles having been driven, the material Digitized by Google §39 DRIFTS, SLOPES. AND SHAFTS 59 within these is excavated to a point near the bottom of the piles, and, if necessary, a third set of piles is driven within the second. This method... is illustrated in Fig. 35.
After driving, the first set of piles a should be strength- ened by timber frames or timber sets at their top and half- way of their length, as the material is excavated from the space they enclose. It is important that these frames should be set promptly and braced by cross-buntons; they are sup- ported by punch blocks e. As will appear from the figure, it will be necessary to set the first sets of piles back a sufficient distance from the shaft to allow for the decreased size of the excavation when each series of piles is driven.
What to read after Geology of Coal ; Examination of Coal Properties ; Drifts, Slopes, And Shafts ; Methods of Working?
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To quickly assess the difficulty of the text, read a short excerpt:
Where thicker beds of quicksand occur, it may be necessary to drive several series of piles, each successive series being driven inside the former after the material has been exca- vated to a point near the bottom of the first piles driven.
The second set of piles having been driven, the material Digitized by Google §39 DRIFTS, SLOPES. AND SHAFTS 59 within these is excavated to a point near the bottom of the piles, and, if necessary, a third set of piles is driven within the second. This method... is illustrated in Fig. 35.
After driving, the first set of piles a should be strength- ened by timber frames or timber sets at their top and half- way of their length, as the material is excavated from the space they enclose. It is important that these frames should be set promptly and braced by cross-buntons; they are sup- ported by punch blocks e. As will appear from the figure, it will be necessary to set the first sets of piles back a sufficient distance from the shaft to allow for the decreased size of the excavation when each series of piles is driven.
What to read after Geology of Coal ; Examination of Coal Properties ; Drifts, Slopes, And Shafts ; Methods of Working?
You can find similar books in the "Read Also" column, or choose other free books by International Correspondence Schools to read onlineMoreLess
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