分层开挖法(国外英文资料).docVIP

分层开挖法(国外英文资料) Stratified excavation method This is one of the most widely used methods, which is to cut and dig from the top of the bank. The main advantage is construction is simple, use general machine equipment can undertake construction. For blasting rock size, reduce the vibration of the neutral-point earthing, are easier to control, construction technology is relatively simple, riverbank protection and reinforcement combined bolting and shotcrete (for example, etc.) are easy to make. If bank slope excavation, the slope is steep, building roads is not economic or impossible, usable shaft slag or pushing stone slag on bank slope foot, the road leads to the excavation working face is the most simple way. A slag method of the road. When the excavation of the bank is large, the construction of this method can meet the requirements of high intensity excavation. The thickness of excavated layer is determined by the performance of geology, topography and mechanical equipment. If the slope is steep, the main road (that is, the working platform) can be arranged every 40M. The upper blast slag dump the work platform or the bulldozer to the working platform for secondary transport. If the slope of the bank is steep, the construction of the road will be large, and the construction tunnel will be connected to the work surface. The surface of shore-slope is formed by means of pre-splitting blasting or blasting. 2? A slag method is in the shaft. When the slope is too steep to build the road, and the shipping, overwood or other reason is not allowed to push the slag into the river bed before the intercepting flow, the slag method can be used. Figure 7-9 shows a slag map of the shaft of the Italian yanmiyay dam. Engineering construction in front of the river closure ballasts are not allowed to be thrown into the river, and bank slope is very steep cannot build roads, bank slope excavation height of 135 M, the right bank excavated volume for 44000 ` ` M ^ 3, the left bank of 18