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Method for eliminating loess foundation collapsibility through microwave heating

A microwave heating and microwave heating device technology, applied in the field of geotechnical engineering, can solve problems such as incomplete elimination of collapsibility, reduction of soil strength, and limited heating methods, etc., to achieve easy promotion and use, high heat utilization efficiency, and elimination of moisture trapping effect

Inactive Publication Date: 2015-12-16
XIAN UNIV OF SCI & TECH
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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 for eliminating collapsibility of loess foundations. Traditional heating uses various fuels such as gasoline and natural gas as heating sources, which have various disadvantages such as pollution, difficulty in control, shallow treatment depth, and incomplete elimination of collapsibility. Seriously restrict the technical development of heating method to eliminate the collapsibility of loess foundation

Method used

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  • Method for eliminating loess foundation collapsibility through microwave heating
  • Method for eliminating loess foundation collapsibility through microwave heating
  • Method for eliminating loess foundation collapsibility through microwave heating

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Embodiment Construction

[0036] Such as figure 1 Shown, microwave heating of the present invention eliminates the method for loess foundation collapsibility, comprises the following steps:

[0037] Step 1. Determining the treatment area: according to the building code for collapsible loess areas (GB50025-2004), determine the plane treatment range and treatment thickness of the collapsible loess foundation;

[0038] Step 2. Drilling and heating the soil around the drilling hole with microwave irradiation: use an engineering geological drilling rig to drill the hole, the depth of the drilling hole is the same as the thickness of the collapsible loess foundation, and the layout of the drilling holes is quincunx, rectangular or Rectangular, the distance between two adjacent boreholes is 400mm ~ 1500mm; in the process of drilling, each time a borehole is drilled, the soil around the borehole is heated by a microwave heating device from bottom to top. Carry out microwave irradiation heating in sections;

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Abstract

The invention discloses a method for eliminating loess foundation collapsibility through microwave heating. The method includes the steps that firstly, a processing area is determined, and according to collapsible loess area building standards, the plane processing range and the processing thickness of a collapsible loess foundation are determined; secondly, drilling is carried out, soil around drilled holes is heated through microwave irradiation, an engineering geological drilling rig is adopted for drilling, the depth of the drilled holes is the same as the processing thickness of the collapsible loess foundation, and the drilled holes are distributed in a quincunx shape, a rectangular shape or a cuboid shape; in the drilling process, after each drilled hole is formed, the soil around the drilled hole is heated through microwave irradiation in a segmented mode from bottom to top by means of a microwave heating device; thirdly, the drilled holes are filled with cohesive soil, and layered compacting is carried out. The method is simple in step and convenient to implement, can effectively eliminate collapsibility of the collapsible loess foundation, and is wide in application range, free of pollution, easy to control in site, high in practicality, good in use effect and convenient to use and popularize.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a method for eliminating collapsibility of 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...

Claims

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Application Information

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IPC IPC(8): E02D3/11E21B7/02E21B36/00
Inventor 秦立科
Owner XIAN UNIV OF SCI & TECH
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