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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

Inactive Publication Date: 2021-06-08
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the problem of poor uniformity of soil moisture content in the existing large-scale humidification using steam by disclosing a method for using steam to humidify the soil

Method used

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  • A method of using water vapor to moisten soil
  • A method of using water vapor to moisten soil
  • A method of using water vapor to moisten soil

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Embodiment 1

[0051] Present embodiment 1 provides a kind of method utilizing steam to moisten the soil, comprising the following:

[0052] S1. Install humidification equipment

[0053] The humidification equipment is composed of three storage tanks 1, three humidification pipes 2, several air pipes 3, pressure regulating valve 4 and electric hot water steam generator 5, wherein,

[0054] The storage barrel 1 described in this embodiment is an open model steel barrel with a diameter of 200cm and a height of 100cm;

[0055]The humidifying pipe 2 described in this embodiment is made of a steel pipe with a sealed lower end. The pipe body 21 has a length of 120 cm and a diameter of 5 cm. Every 10cm in the length direction, four steam diffusion holes 22 are symmetrically arranged on the pipe wall of the pipe body 21. The diameter of the steam diffusion holes 22 is 2mm, and each steam diffusion hole is provided with a mud-repelling net 23, and the mud-resistance net 23 can be general gauze;

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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.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28E02D3/10
CPCE02D3/10
Inventor 李建东张延杰王旭蒋代军刘德仁韩高孝杨成牛亚强何菲王兴为周亚龙
Owner LANZHOU JIAOTONG UNIV
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