터널링
Due to the unique topography of the project area, which includes high desert regions of the Antelope Valley, high mountains of the San Gabriel Mountain range and dense urban areas of the San Fernando Valley, tunnels are utilized throughout the project section. These tunnels are used to address topographic constraints (high mountains), and avoid and reduce impacts to communities, habitat and facilities above (homes, freeways, etc.). With the complex geological conditions and fault zones within the tunneling areas, key considerations were accounted for in the design elements, such as type of tunnel, seismic fault chambers, access points, sound mitigation and safety. The approximate length of tunnels in the Palmdale to Burbank Project Section is 22 to 28 miles.
우선 대안인 SR14A에는 총 28마일에 달하는 4개의 터널이 있습니다.
터널의 종류
![자르고 덮다](https://meethsrsocal.org/wp-content/uploads/2022/07/Cut-and-Cover.png)
![터널 보링 머신](https://meethsrsocal.org/wp-content/uploads/2022/07/Tunnel-Boring-Machine.png)
터널 보링 머신 애니메이션
깊이 지도
노선 간 비교
이 표는 다양한 설계 특징과 터널 구간 길이를 포함하여 Palmdale의 Spruce Court에서 Burbank Station까지의 각 대안에 대한 정보를 제공합니다.
![P-B Tunneling Table](https://meethsrsocal.org/wp-content/uploads/2024/06/P-B-Tunneling-Table.jpg)
포털 예시
![포털 예 1 포털 예 1](https://meethsrsocal.org/wp-content/uploads/2021/05/Portal_Example2.png)
![포털 예시 2 포털 예시 2](https://meethsrsocal.org/wp-content/uploads/2021/05/Portal_Example4.png)