Microwave heating and strengthening method for collapsible loess foundation

The invention discloses a microwave heating and strengthening method for a collapsible loess foundation. The method includes the steps that (1) a to-be-treated area is determined; according to building codes of collapsible loess areas, the plane treatment range and the treatment thickness of the collapsible loess foundation are determined; (2) hole drilling is conducted and microwave irradiation heating is conducted on the soil around drilled holes, specifically, hole drilling is performed by an engineering geological drilling rig, the depth of the drilled holes is equal to the treatment thickness of the collapsible loess foundation, the drilled holes are distributed in a quincunx shape, a rectangle shape or an oblong shape, and microwave irradiation heating is performed on the soil around the drilled holes in a segmented mode from bottom to top by means of microwave heating devices for the soil around the drilled holes every time after one hole is drilled during hole drilling; (3) drilled hole filling is performed; and (4) mattress layer construction is conducted. The microwave heating and strengthening method for the collapsible loess foundation has simple steps, and is convenient to implement, apply and popularize, wide in application range, free of pollution, easy to control on the site, high in practicability, good in usage effect and capable of effectively eliminating collapsibility of the loess foundation and improving the bearing capacity of the loess foundation.