四川省水利水电建筑工程预算定额的石方工程说明（Sichuan Province Water Conservancy and hydropower construction engineering budget quota description of rock engineering）.doc

四川省水利水电建筑工程预算定额的石方工程说明（Sichuan Province Water Conservancy and hydropower construction engineering budget quota description of rock engineering） Sichuan Province Water Conservancy and hydropower construction engineering budget quota of second chapter of rock engineering Explain First, this chapter includes general stonework, protective layer, groove, pit excavation, tunnel, shaft, shaft, presplitting blasting excavation of rock and gravel transport quota 77 day. Two. The units of measurement in this chapter, except those indicated, are in accordance with the natural square. Three, general rock excavation quota, applicable to the general excavation of rock engineering; trench bottom width of over 7 meters; is more than 160 square metres of rock pit excavation; angle less than or equal to 20 degrees, the excavation thickness greater than 5 meters (perpendicular to the design of the average thickness of excavation of the slope rock). Four, the general slope excavation excavation quota, applicable to the design of angle greater than 20 degrees and the thickness of 5 meters of stone. Five and the protective layer of rock excavation quota, suitable for the design shall not allow the destruction of the rock structure of rock excavation engineering, such as dam foundation, dam foundation, Taiwan power plant foundation, stilling basin, corridor connecting engineering rock thickness calculation, according to the requirements of the design. Six, groove rock excavation quota, for a long strip of rock bottom width is less than or equal to 7 meters, or both sides of the vertical slope excavation engineering. Such as channel, intercepting trough, drainage ditch, geosyncline and so on. The bottom width of more than 7m in general rock excavation calculation, a protective layer and a protective layer, according to the general rock proportion calculation. Seven, the slope excavation quota for groove rock, groove rock on the bottom of the channel axis and horizontal angle greater than 2