珠江口隧道为深江铁路控制性工程，沿线众多控制因素如港口及码头密集，穿越多条高等级航道，河床水深变化大，地质条件复杂，工程规模大、风险高等, 制约着本工程的实施。为确定深江铁路珠江口隧道的线路方案，首先，对珠江口两岸城市规划、航道、环境敏感点、地质等选线控制因素进行分析，选择合适的越江点位置；
然后，结合越江点位置，提出在虎门太平水道入海口越江的“深圳—虎门—南沙”北线方案和在深圳宝安机场跑道以北500 m越江的“深圳—南沙”南线方案；
最后，考虑串联经济据点、线型条件、海底隧道修建难度、运营条件、对城市规划和环境的影响、工期及工程投资等因素，对线路方案进行综合比选，发现北线方案更具优势并确定其为推荐方案。
The Pearl river estuary tunnel project of the ShenzhenJiangmen
railway is challenging. Many control factors along the route, including dense
ports and wharves, crossing multiple highgrade channels,
variable depths of river bed water, complex geological conditions, large scale,
and high risk, restrict the project implementation. To determine the route
scheme of the Pearl river estuary tunnel of the ShenzhenJiangmen railway, scheme research is conducted. First, the control
factors for the route selection, such as urban planning, waterways,
environmentally sensitive points, and geology on both sides of the Pearl river
estuary, are analyzed, and the appropriate locations of the crossing points are
selected. Second, two route schemes, the northern route scheme of ShenzhenHumenNansha crossing the river at the
estuary of the Taiping waterway in Human and the southern route scheme of
ShenzhenNansha crossing the river 500-m north of the
runway of Shenzhen Bao′an airport, are proposed.
Finally, based on the comprehensive comparison and selection of economic bases
in series, line conditions, construction difficulty of subsea tunnels,
operating conditions, impact on urban planning and environment, construction
period, and project investment, etc., the northern route scheme has more
advantages; hence, it is the recommended scheme.
