价值工程
價值工程
개치공정
VALUE ENGINEERING
2014年
6期
104-105,106
,共3页
隧洞掘进%超前锚杆%挂网喷浆%钢支架支护%实践
隧洞掘進%超前錨桿%掛網噴漿%鋼支架支護%實踐
수동굴진%초전묘간%괘망분장%강지가지호%실천
tunnel excavation%advanced anchor%hanging net guniting%steel supporting bracket%practice
四方金矿新建尾矿库排洪隧洞设计断面为4m×4.2m，掘进断面虽不大，但由于施工工期紧，贯穿整个隧洞的岩性变化大，尤其是隧洞出口部位由薄层千枚岩组成，虽未发现明显变形破坏迹象，但由于节理切割及卸荷裂隙影响，表面拉裂松动现象发育，洞脸边坡开挖时产生滑塌，严重影响施工安全和进度。经过施工技术方案分析比较，采取超前锚杆和挂网喷浆、钢支架等临时支护措施后，为确保安全施工和提前完成施工计划赢得了时间。
四方金礦新建尾礦庫排洪隧洞設計斷麵為4m×4.2m，掘進斷麵雖不大，但由于施工工期緊，貫穿整箇隧洞的巖性變化大，尤其是隧洞齣口部位由薄層韆枚巖組成，雖未髮現明顯變形破壞跡象，但由于節理切割及卸荷裂隙影響，錶麵拉裂鬆動現象髮育，洞臉邊坡開挖時產生滑塌，嚴重影響施工安全和進度。經過施工技術方案分析比較，採取超前錨桿和掛網噴漿、鋼支架等臨時支護措施後，為確保安全施工和提前完成施工計劃贏得瞭時間。
사방금광신건미광고배홍수동설계단면위4m×4.2m，굴진단면수불대，단유우시공공기긴，관천정개수동적암성변화대，우기시수동출구부위유박층천매암조성，수미발현명현변형파배적상，단유우절리절할급사하렬극영향，표면랍렬송동현상발육，동검변파개알시산생활탑，엄중영향시공안전화진도。경과시공기술방안분석비교，채취초전묘간화괘망분장、강지가등림시지호조시후，위학보안전시공화제전완성시공계화영득료시간。
The drainage tunnel design section of new tailings in Sifang Goldmine is is 4mí4.2m, which is not too large. However, due to the tight construction schedule and the big lithology variation throughout the entire tunnel, especially the tunnel exit site is consists of the thin phyllite, although there are not obvious signs of deformation damage, affected by the joints cutting and unloading fissure, surface crack loosening is growing, and slump produced in the slope excavation of hole face, which seriously affects the safety and progress of construc-tion. After the construction technology program analysis and comparison, they take temporary support measures of advanced anchor, hanging net guniting and steel bracket to ensure the safe construction and gain time for completed ahead of construction plan.
