利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN110630285A 一种大断面软岩隧道锚索—钢架支护及施工方法 无效 - 驳回

一种大断面软岩隧道锚索—钢架支护及施工方法
摘要：
本发明提供一种大断面软岩隧道锚索—钢架支护及施工方法，包括预拉锚索、锚具、U型连接构件、超前注浆小导管和锁脚锚管；本发明选择树脂锚固剂，锚固更快，锚固力更强，与传统注浆锚管相比，简化了工序，节省了时间；选用锚索悬吊钢架的形式，避免了上台阶钢架在支护初期发生大的沉降变形，并使钢架紧贴在围岩上，保证初期支护和钢架共同变形，向预拉锚索施加预应力后，锚索—钢架向围岩提供预应力，使松散围岩形成承载环；本发明的支护方式中取消了隧道系统锚杆，本发明控制了围岩大变形，减小了预留变形量，大大降低了开挖量、出渣量、钢材及混凝土用量，极大的节约了施工成本；本发明锚索向钢架提供的径向力，避免钢架发生变形。
摘要（英）：

The invention provides large-section soft-rock tunnel anchor cable-steel frame supporting and a construction method. The large-section soft-rock tunnel anchor cable-steel frame supporting includes a pretensioning anchor cable, an anchoring device, a U-shaped connecting component, an advance grouting small guide pipe and a pin locking anchor pipe. According to the large-section soft-rock tunnel anchor cable-steel frame supporting, a resin anchoring agent is selected, anchoring is faster, anchoring force is higher, compared with traditional grouting anchor pipes, the process is simplified, and the time is saved; a form of an anchor cable suspension steel frame is selected and used, large settlement deformation of an upper step steel frame in the initial stage of the supporting is avoided, thus the steel frame is closely attached to surrounding rock, joint deformation of the initial supporting and the steel frame is ensured, after prestress is applied to the pretensioning anchor cable, the anchor cable and the steel frame provide the prestress to the surrounding rock, and thus the loose surrounding rock forms a bearing ring; a tunnel system anchor rod is removed from a supporting pattern, large deformation of the surrounding rock is controlled, the reserved deformation amount is decreased, the excavation amount, the deslagging amount and the use amount of rolled steel and concreteare greatly decreased, and the construction cost is greatly saved; and radial force is provided by the anchor cable to the steel frame, and the steel frame is prevented from deforming.

0/0