三峡永久船闸深槽爆破开挖技术

三峡永久船闸施工开挖任务重、强度高、干扰多、难度大、工期紧.为使深槽开挖顺利进行,确保高边坡直立墙稳定,满足设计和现行施工技术规范的要求,结合船闸工程的地质条件和施工实际,做了一系列深槽开挖爆破对比实验,选取了适合永久船闸开挖特点的深槽开挖方法--"L"型预留保护层爆破法抽槽,保证了优质、高效和安全文明施工,取得了预期的效果.

Blasting excavation technology for deep chamber trench of TGP's permanent shiplock

The excavation construction of TGP's permanent shiplock was characterized by great quantity, high intensity, numerous interference, short construction period and great difficulty in construction. In order to smoothly conduct excavation construction of the deep chamber trench and keep the stability of the vertical wall of high sideslope and meet the design requirement and present construction technology code, in the light of the geologic condition and construction practice of the shiplock project, a series of comparison tests on blasting excavation for deep chamber trench were carried out. The deep chamber trench excavation method, blasting excavation with prereserved surface layer of "L" shape, was determined, which was adaptable to the excavation characteristics of the permanent shiplocks and high quality, efficient and safe construction was achieved with expected results.