Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for optimizing double-side-wall pilot tunnel of ultra-large-span tunnel
The invention relates to the technical field of tunnel construction, in particular to an ultra-large-span tunnel double-side-wall pilot tunnel optimization method, which is characterized in that the size and excavation step pitch of a double-side-wall pilot tunnel are optimally designed, the actual blasting construction steps are improved and optimized, and the actual operation construction effect evaluation is combined, so that the construction efficiency is improved. The step pitch of upper and lower steps of the left and right side wall pilot pits is greatly increased, and the operation space of a wet spraying manipulator and a primary spraying tank truck is ensured. Meanwhile, the vault settlement and the convergence displacement on the two sides are greatly reduced relative to the original scheme, the obtained surrounding rock displacement and the extreme value of the internal force of the initial supporting structure are not large and are within the reasonable range, and surrounding rock deformation and structural stress can be well controlled while the mechanical construction requirement is met. Under the blasting effect, the safety coefficient of the double-side-wall section steel frame and the concrete meets the structural safety degree requirement and the safety coefficient requirement of the specification of the detailed rule of highway tunnel design.
本发明涉及隧道施工技术领域，具体地说是一种超大跨度隧道双侧壁导坑优化方法，本发明通过对双侧壁导坑尺寸和开挖步距进行优化设计，结合实际的爆破施工步骤的改进优化，并结合实际操作施工效果评估，实现了左、右两侧侧壁导坑上下台阶步距大大增加，保证湿喷机械手和初喷料罐车的作业空间。同时拱顶沉降及两侧收敛位移相对原方案分别大幅度减小，得到的围岩位移及初支结构内力极值都不大，处于合理范围内，在满足机械化施工要求的同时，也能够较好地控制围岩变形及结构受力。爆破作用下双侧壁段钢架和混凝土的安全系数满足结构安全度要求和《公路隧道设计细则》规范安全系数要求。
Method for optimizing double-side-wall pilot tunnel of ultra-large-span tunnel
The invention relates to the technical field of tunnel construction, in particular to an ultra-large-span tunnel double-side-wall pilot tunnel optimization method, which is characterized in that the size and excavation step pitch of a double-side-wall pilot tunnel are optimally designed, the actual blasting construction steps are improved and optimized, and the actual operation construction effect evaluation is combined, so that the construction efficiency is improved. The step pitch of upper and lower steps of the left and right side wall pilot pits is greatly increased, and the operation space of a wet spraying manipulator and a primary spraying tank truck is ensured. Meanwhile, the vault settlement and the convergence displacement on the two sides are greatly reduced relative to the original scheme, the obtained surrounding rock displacement and the extreme value of the internal force of the initial supporting structure are not large and are within the reasonable range, and surrounding rock deformation and structural stress can be well controlled while the mechanical construction requirement is met. Under the blasting effect, the safety coefficient of the double-side-wall section steel frame and the concrete meets the structural safety degree requirement and the safety coefficient requirement of the specification of the detailed rule of highway tunnel design.
本发明涉及隧道施工技术领域，具体地说是一种超大跨度隧道双侧壁导坑优化方法，本发明通过对双侧壁导坑尺寸和开挖步距进行优化设计，结合实际的爆破施工步骤的改进优化，并结合实际操作施工效果评估，实现了左、右两侧侧壁导坑上下台阶步距大大增加，保证湿喷机械手和初喷料罐车的作业空间。同时拱顶沉降及两侧收敛位移相对原方案分别大幅度减小，得到的围岩位移及初支结构内力极值都不大，处于合理范围内，在满足机械化施工要求的同时，也能够较好地控制围岩变形及结构受力。爆破作用下双侧壁段钢架和混凝土的安全系数满足结构安全度要求和《公路隧道设计细则》规范安全系数要求。
Method for optimizing double-side-wall pilot tunnel of ultra-large-span tunnel
一种超大跨度隧道双侧壁导坑优化方法
WANG LEI (Autor:in) / WANG BINJIE (Autor:in) / SHEN YUEHUI (Autor:in) / WANG FENGXI (Autor:in) / JIANG GUOSHENG (Autor:in) / GUO WEI (Autor:in) / KIM IN-KWI (Autor:in) / LIU TAO (Autor:in)
29.10.2024
Patent
Elektronische Ressource
Chinesisch
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