A method of using water vapor to moisten soil

A water vapor and wet soil technology, applied in soil protection, preparation of test samples, construction, etc., can solve problems such as poor soil moisture content uniformity, achieve uniform humidification, improve uniformity, and overcome humidification time. long effect
CN111519601BInactive Publication Date: 2021-06-08LANZHOU JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LANZHOU JIAOTONG UNIV
Publication Date
2021-06-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for humidifying soil by using water vapor, which belongs to the field of geotechnical engineering construction. The method for humidifying the soil comprises the steps of: installing a humidifying device consisting of a storage tank, a humidifying pipe, an air pipe, a pressure regulating valve and a steam generator, the humidifying pipe is vertically arranged in the middle of the storage tank and passes through The gas pipeline is connected to the pressure regulating valve; the pressure regulating valve is connected to the steam generator through the gas pipeline; the soil sample is filled; the water steam generator is turned on and the pressure of the pressure regulating valve is set to 0.02-0.10MPa, and the first humidification is carried out, 20 Close after ‑30min; seal the base surface of the soil sample, and return to moisture for 10‑12h; turn on the steam generator and set the pressure of the pressure regulating valve to 0.07‑0.15MPa, perform the second humidification, and close after 6‑7h . The invention not only can quickly, uniformly and controllably humidify large-volume soil, but also can effectively enhance the coupled diffusion and migration of heat and mass under the action of pressure gradient, water content gradient and temperature gradient, and has the advantage of good humidification uniformity.
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Description

technical field

[0001] The invention belongs to the field of geotechnical engineering construction, and in particular relates to a method for humidifying soil by using water vapor. Background technique

[0002] Natural loess is widely distributed in Northwest China. It has the characteristics of large thickness, low strength, low moisture content and strong collapsibility. Due to its special structure and composition, its strength decreases rapidly and its deformation increases greatly after being soaked in water. , seriously affecting the construction of structures. Therefore, in order to solve the collapsibility problem of loess and improve the bearing capacity and deformation resistance of the foundation, it is necessary to do foundation treatment before the construction of the structure. Existing foundation treatment methods include dynamic compaction, soil replacement, compaction piles and soil humidification. The first three are suitable for foundations with thinner ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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