Brother, if you think that place has good feng shui and insist on building it there, I will give you the following advice from a professional point of view.
I don't know how thick your pile foundation is. This will happen to pile foundations on highways and railways in general. First, the appropriate length and number of steel bars should be driven obliquely along the pile foundation at the quicksand (the appropriate number should be calculated) to ensure that the excavation will not collapse. Prepare straw, bind it into bundles, and dig down to the right depth. The pile foundation is supported by driven steel bars, and straw is inserted to let the water flow out of the sand. As a wall protection, this cycle until it passes through the quicksand layer.
Be careful.