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Keywords: drainage tunnel
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-533
... north-east of Bangkok, consists of Jurassic sedimentary rocks of Khorat (Phu-Kradung) formation; mainly as sandstone, sand/siltstone, siltstone and quaternary deposits of clay/mudstone. Major underground structures are Access tunnel to Powerhouse, Central Powerhouse cavern (Figure 1), Drainage tunnel in...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 12–16, 1988
Paper Number: ISRM-IS-1988-063
... drainage tunnel (under atmospheric pressure) is excavated in the rock founda tion and linked to the gallery by drainage holes, zero water pressures should be assumed in the drainage line. The purpose of this paper is to pr~ sent data on uplift pressures at the base and in discontinuities of preferential...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-050
... testing samples were cured in wa- ter from 4 to 6 days. The data on shear strength of weak rock are given in Table 1; Table 1. Shear strength paral'l'Eters of the sedimentary rock along the Ust-llim Hydro PO\\er Plant drainage tunnel. Rock type, state Shear strength parameters: tq Lp CX10~ Pa Shear...

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