Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bevel-angle sleeve arch structure of half-open and half-dark section of tunnel portal and construction method
The invention relates to an oblique-angle sleeve arch structure of a half-open and half-dark section of a tunnel portal and a construction method. When the axis of a mountain tunnel entrance obliquely intersects with a mountain landform line, the tunnel entrance section has bias pressure and is difficult to enter the tunnel. The structure is located at a semi-open and semi-dark section of a tunnel portal and comprises an oblique angle sleeve arch and a uniform-section sleeve arch. The bevel sleeve arch is located at the part, connected with the open excavation section, in the semi-open and semi-dark section; the inner side of the bevel sleeve arch is gradually shrunk inwards from front to back in the longitudinal direction of the tunnel, and the annular length is gradually decreased from front to back in the longitudinal direction of the tunnel; the uniform-section cover arch is located at the part, connected with the underground excavation section, in the semi-open and semi-dark section; the circumferential length of the uniform-section cover arch is the same as that of the rear end of the bevel-angle cover arch, and the circumferential length of the uniform-section cover arch is the same from front to back in the longitudinal direction of the tunnel. By means of the cover arch structure constructed in a segmented mode along the inclined angle of the mountain body, excavation damage to the surrounding mountain body is reduced, and the technical problem that the tunnel enters the hole under the severe bias terrain can be effectively solved.
本发明涉及一种隧道洞口半明半暗段的斜角套拱结构及施工方法。山区隧道进口轴线与山体地形线斜交时，洞口段存在偏压，进洞困难。本结构位于隧道洞口的半明半暗段，包括斜角套拱和等截面套拱；斜角套拱位于半明半暗段内与明挖段衔接的部分；斜角套拱的内侧沿隧道纵向方向自前向后逐渐内缩，环向长度沿隧道纵向方向自前向后逐渐递减；等截面套拱位于半明半暗段内与暗挖段衔接的部分；等截面套拱的环向长度与所述斜角套拱后端的环向长度相同，所述等截面套拱环向长度沿隧道纵向方向自前向后均相同。本发明通过沿山体斜角度、分段施作的套拱结构，降低了对周边山体的开挖破坏，能有效地解决严重偏压地形下隧道进洞的技术难题。
Bevel-angle sleeve arch structure of half-open and half-dark section of tunnel portal and construction method
The invention relates to an oblique-angle sleeve arch structure of a half-open and half-dark section of a tunnel portal and a construction method. When the axis of a mountain tunnel entrance obliquely intersects with a mountain landform line, the tunnel entrance section has bias pressure and is difficult to enter the tunnel. The structure is located at a semi-open and semi-dark section of a tunnel portal and comprises an oblique angle sleeve arch and a uniform-section sleeve arch. The bevel sleeve arch is located at the part, connected with the open excavation section, in the semi-open and semi-dark section; the inner side of the bevel sleeve arch is gradually shrunk inwards from front to back in the longitudinal direction of the tunnel, and the annular length is gradually decreased from front to back in the longitudinal direction of the tunnel; the uniform-section cover arch is located at the part, connected with the underground excavation section, in the semi-open and semi-dark section; the circumferential length of the uniform-section cover arch is the same as that of the rear end of the bevel-angle cover arch, and the circumferential length of the uniform-section cover arch is the same from front to back in the longitudinal direction of the tunnel. By means of the cover arch structure constructed in a segmented mode along the inclined angle of the mountain body, excavation damage to the surrounding mountain body is reduced, and the technical problem that the tunnel enters the hole under the severe bias terrain can be effectively solved.
本发明涉及一种隧道洞口半明半暗段的斜角套拱结构及施工方法。山区隧道进口轴线与山体地形线斜交时，洞口段存在偏压，进洞困难。本结构位于隧道洞口的半明半暗段，包括斜角套拱和等截面套拱；斜角套拱位于半明半暗段内与明挖段衔接的部分；斜角套拱的内侧沿隧道纵向方向自前向后逐渐内缩，环向长度沿隧道纵向方向自前向后逐渐递减；等截面套拱位于半明半暗段内与暗挖段衔接的部分；等截面套拱的环向长度与所述斜角套拱后端的环向长度相同，所述等截面套拱环向长度沿隧道纵向方向自前向后均相同。本发明通过沿山体斜角度、分段施作的套拱结构，降低了对周边山体的开挖破坏，能有效地解决严重偏压地形下隧道进洞的技术难题。
Bevel-angle sleeve arch structure of half-open and half-dark section of tunnel portal and construction method
隧道洞口半明半暗段的斜角套拱结构及施工方法
WANG WANPING (Autor:in) / YUE LINBO (Autor:in) / CAO XIAOYONG (Autor:in) / KOU BAOWEN (Autor:in) / XU PING (Autor:in) / YANG SHAOZHAN (Autor:in)
06.05.2022
Patent
Elektronische Ressource
Chinesisch
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