石湖港區3000噸級貫徹國防要求(一期)工程基槽礁巖水下baopo、清碓施工方案.doc
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泉州港石湖作業區3000噸級貫徹國防要求(一期)工程
基槽礁巖水下baopo、清碓施工方案
1、工程概況：
本工程為泉州港石湖作業區3000噸級貫徹國防要求(一期)工程，該工程為兩個3000t級泊位，分1#泊位和2#泊位；碼頭結構為重力式沉箱結構，基礎為拋石基床。碼頭基礎施工為基槽挖泥、拋石等，在碼頭基槽開挖過程中發現基槽開挖范圍有礁盤和1#泊位基槽東側邊坡出現坍塌，碼頭基礎施工不能如期正常進行，原有施工方案需要增加基槽礁盤baopo，清礁，以及護岸邊坡處理，工期延長，為了便于碼頭基槽開挖順利和安全，對基槽baopo、清礁和護岸卸載采取穩妥而有效的措施。
1#泊位基槽南北朝向，碼頭泊位長52m左右，北側為海域，東側為陸地的拋石護岸，該護岸邊坡坡度為1:1，碼頭基槽底東側邊線與護岸的坡腳基本接近，護岸坡腳標高為-1.0m~-2.0m，碼頭基槽底標高為-8.0m~12.5m，因此，基槽開挖要開挖除護岸部分邊坡，否則開挖過程護岸邊坡極不穩定，已出現部份坍塌；所發現礁盤范圍：靠北端(前沿線端頭)起30米左右，寬30米左右，礁盤頂
Shek Wu operation area of Quanzhou Port 3000-ton national defense requirements (a) project
Foundation trench underwater reef blasting, clean pestle construction plan
1, Project Overview:
This works for the operation zone of Quanzhou Port 3000-ton Shek Wu national defense requirements (a) project, the project for two 3000t-class berths, berths and sub-1 # 2 # berth; terminal structure of gravity caisson structure, base polishing stone foundation bed. Pier foundation construction for the foundation trench dredging, riprap, etc., in the terminal found during excavation of foundation trench excavated foundation trench scope of reefs and a Berth foundation trench collapses the east slope, the terminal can not be scheduled based on the normal construction the original construction program will need to increase the base groove reefs blasting, clear reef, and the revetment slope treatment, duration of extension, in order to facilitate the smooth and pier foundation trench excavation safety, blasting on the base, clear reef and unloading to take prudent and effective bank protection measures.
1 Berth-based slot Southern and Northern Dynasties berths around 52m long, north to the waters east of riprap for the land, the revetment slope gradient of 1:1, the terminal base bottom of the foot of the east sideline with the revetment basic approach, revetment slope elevation-1.0m ~-2.0m, terminal-based bottom elevation-8.0m ~ 12.5m, therefore, excavation of foundation trench excavation should be part of inter revetment slope, shore protection or excavation unstable slope, part of the collapse have emerged; discovered reefs range: through the northern end (front line ends) within 30 meters, 30 meters wide and around reefs Top