On the afternoon of July 27, the first excavating blast done at Shantou Bay subsea tunnel marked that the high-speed rail subsea tunnel designed with a speed of 350 kilometers per hour had officially entered the substantive construction stage.

The Shantou Bay subsea tunnel functions as a key control project of the Shantou-Shanwei High-speed Railway, with a total length of 9,781 meters and a design speed of 350 kilometers per hour. It will be constructed through a combined scheme of "shield method + mining method". The blasting this time was operated at a rather prosperous and sensitive area in Haojiang District. The Shantou-Shanwei Sixth Bid Project Department designed the blasting parameters strictly according to "weak blasting" standard. The success of the first blasting marked the Shantou-Shanwei Sixth Bid's tunnel construction had kicked off in an all-round way and entered the formal excavation stage. At the same time, the relevant parameters of the "first blast" will provide a reference basis for the subsequent project blasting construction and lay a foundation for every success of construction tasks.

Source:Shantou Daily, July 29, 2020

汕头湾海底隧道进入实质性施工阶段

7月27日下午，汕头湾海底隧道迎来首次爆破，标志着设计时速350公里的高铁海底隧道正式进入实质性施工阶段。

  汕头湾海底隧道是汕汕铁路关键控制性工程，全长9781米，设计时速350公里，采用“盾构法+矿山法”的组合施工方案。此次爆破作业点均位于濠江区境内，属于在比较繁华和敏感的区域作业，汕汕六标项目部严格按“弱爆破”进行爆破参数设计，实现首爆成功，标志着汕汕六标隧道施工全面拉开帷幕，进入正式开挖阶段。同时，“首爆”的相关参数为项目后续爆破施工提供了依据，为顺利完成施工任务奠定了基础。

来源：汕头日报2020-7-29