So the essential way of solving the problem is that take engineering measurements to utilize the discarding soil adequately under the precondition of subgrade stability, reduce the quantity of discarding and borrow soil.

• 因此解决这一问题的根本途径是采取工程措施,在保证路基稳定的前题下,充分利用膨胀土,减少借、弃土方数量。