Method of Microwave Heating Strengthening Collapsible Loess Foundation

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a method for strengthening collapsible loess foundation by microwave heating. Background technique [0002] Loess refers to the porous yellow silty soil with columnar joints formed under dry climate conditions. Collapsible loess will produce large subsidence after being soaked by water. Loess is widely distributed in the world, accounting for one-tenth of the global land area. China is the country with the widest distribution and thickness of loess in the world. The Loess Plateau in Northwest my country is the largest Loess Plateau in the world, and the Loess Plain in North China It is the largest loess plain in the world. Because the loess has large pores and low density, especially when the collapsible loess meets water, not only the strength of the soil body is reduced, but also the soil structure is damaged, resulting in significant settlement, re...

AI Technical Summary

Problems solved by technology

Because loess has large pores and low density, especially when collapsible loess encounters water, not only the strength of the soil body is reduced, but also the soil structure is damaged, resulting in significant settlement, resulting in a large number of foundation instability accidents

The heating and roasting method is a method of loess foundation reinforcement. Traditional heating uses various fuels such as gasoline and natural gas as heating sources. There are various shortcomings such as pollution, difficulty in control, shallow treatment depth, and insufficient reinforcement depth, which seriously limit the heating method. Technical Development of Strengthening Loess Foundation

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