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“H215”道路施工地段为山岭重丘三级公路,公路的两侧山体地形坡度小,多在30°左右,延线公路要穿山越岭过溪。不良地质较多,有隧洞、桥梁、坡路的施工,桥梁基础拟采用桩基或墩(台)基,桩基拟采用大口径钻孔灌注桩,桩基或墩岩溶地质条件以石英砂岩强度高,可作为桥墩桩基持力层,这样可减少投资费用。粉砂质泥岩埋藏较深,强度较低,应适当增加桩长这样可增加桥梁的安全性。
“H215 ” road construction section of the mountain heavy hill three highway, the mountainous slope on both sides of the road slope is small, mostly about 30 °, the extension of the highway to cross the river through the mountains. Bad geology is more, there are tunnels, bridges, slope construction, the bridge foundation is intended to use pile or pier (base), the proposed use of large-diameter pile foundation pile, pile foundation or pier karst geology to quartz sandstone strength High, can be used as a pier pile holding layer, so as to reduce investment costs. Silty mudstone buried deeper, lower strength, should be appropriate to increase the length of the pile to increase the safety of the bridge.