铁道标准设计
鐵道標準設計
철도표준설계
Railway Standard Design
2015年
11期
79-82,83
,共5页
崔柔柔%杨其新%蒋雅君
崔柔柔%楊其新%蔣雅君
최유유%양기신%장아군
软岩隧道%新意法%超前加固%数值模拟%玻璃纤维锚杆%加固参数
軟巖隧道%新意法%超前加固%數值模擬%玻璃纖維錨桿%加固參數
연암수도%신의법%초전가고%수치모의%파리섬유묘간%가고삼수
Soft-rock tunnel%ADECO-RS approach%Advanced reinforcement%Numerical simulation%Fiber glass anchor bar%Reinforcement parameter
新意法的核心思想是通过调节超前核心土的强度和刚度来控制围岩变形。通过数值计算方法模拟掌子面玻璃纤维锚杆加固参数(加固长度、搭接长度、加固范围)在软岩隧道变形中的作用，得出软岩隧道的变形规律。结果表明：(1)加固超前核心土能有效控制隧道变形；(2)根据隧道预收敛变形可以确定锚杆长度，根据掌子面失稳机理和破裂面的深度可以确定锚杆最小搭接长度；(3)在隧道变形允许情况下，可以对掌子面加固范围进行优化，仅加固掌子面中心部位。
新意法的覈心思想是通過調節超前覈心土的彊度和剛度來控製圍巖變形。通過數值計算方法模擬掌子麵玻璃纖維錨桿加固參數(加固長度、搭接長度、加固範圍)在軟巖隧道變形中的作用，得齣軟巖隧道的變形規律。結果錶明：(1)加固超前覈心土能有效控製隧道變形；(2)根據隧道預收斂變形可以確定錨桿長度，根據掌子麵失穩機理和破裂麵的深度可以確定錨桿最小搭接長度；(3)在隧道變形允許情況下，可以對掌子麵加固範圍進行優化，僅加固掌子麵中心部位。
신의법적핵심사상시통과조절초전핵심토적강도화강도래공제위암변형。통과수치계산방법모의장자면파리섬유묘간가고삼수(가고장도、탑접장도、가고범위)재연암수도변형중적작용，득출연암수도적변형규률。결과표명：(1)가고초전핵심토능유효공제수도변형；(2)근거수도예수렴변형가이학정묘간장도，근거장자면실은궤리화파렬면적심도가이학정묘간최소탑접장도；(3)재수도변형윤허정황하，가이대장자면가고범위진행우화，부가고장자면중심부위。
The core idea of ADECO-RS is that the deformation of rock mass is controlled by adjusting the core soil strength and stiffness. The function of face reinforcement parameters ( the reinforcing length, the lap length and reinforcing region ) on the deformation of soft-rock tunnel by numerical simulation is employed to find out the deformation rule of soft-rock tunnel. The results show that (1) the reinforcement of the core rock at tunnel face has significant effect on the tunnel deformation response;( 2 ) the reinforcing length of the anchor bar is defined by the pre-convergence of tunnel, the lap length of the anchor bar is defined by the instability mechanism of the tunnel face and the depth of the breaking cross-section;(3)the reinforcing region of the anchor bar at the tunnel face can be optimized and only the center of the tunnel face is reinforced once allowable tunnel deformation is maintained.
