Route of high speed rail line in Bangkok - Phitsanulok. Use of wells drilled about 150 wells throughout the route starts from Bangkok (BKK) Bangkok (PTE), Ayutthaya (AYA) Sara (SRI) Sawan (NSN) and go to Phitsanulok (PLK) for the characteristics of the soil's natural. This trail is located in the valley of the river (Chao Phraya pain) stretch up to the Nan River in Phitsanulok province gives the appearance of a clay soil found in the debris. (Sedimentary) the path includes floor soils arranged in layers interchangeably, including sand, gravel and clay spread is wider in the central area of Bangkok (Bangkok area) for about 200 to 250 km from east to. west and 250 to 300 km from north to south. It is known that.
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