Thermal-mechanical-electroosmosis multi-field coupling soft soil consolidation test box

Abstract

The invention discloses a thermal-mechanical-electroosmosis multi-field coupling soft soil consolidation test box, which comprises an outer box body, a heating system, a slideway system, an electroosmosis system, and an air bag device; the outer box body is divided into a water storage area and a soft soil area by an inner partition plate, a water outlet is formed in the bottom of the inner partition plate, and geotechnical cloth is arranged; the heating system comprises a plurality of heaters which are longitudinally arranged in the soft soil area at intervals, and is connected with a heating temperature controller; the slideway system comprises a slide rail, a slide block and a corner brace, the slide rail is longitudinally arranged on the inner wall of the soft soil area, the slide block is arranged on the slide rail, and the heater is fixed on the slide rail through the corner brace; the electroosmosis system comprises a cathode plate and an anode plate which are respectively inserted into the soil samples on the two sides of the soft soil area to form a circuit; the air bag device comprises an air bag counterforce cover plate, an air bag and an air pressure servo control system. The device is simple in installation process, cheap and economical in manufacturing material price, high in operability and short in experiment period. Meanwhile, simulation boxes of different sizes can be manufactured according to different experimental schemes, and the device is economical and environmentally friendly.

Description

technical field [0001] The invention relates to the field of geotechnical engineering foundation treatment, in particular to a thermal-mechanical-electroosmotic multi-field coupling soft soil consolidation test chamber. Background technique [0002] Our country has a vast territory, and soft soil is widely distributed in the coastal, river and delta areas. In order to alleviate the shortage of urban infrastructure land in these areas, it is necessary to treat the soft soil foundation to meet the needs of engineering construction. This type of soft soil has the characteristics of high water content, high compressibility, low permeability, low shear strength, high salt content and significant structural and rheological properties, so its treatment is more complicated. [0003] Chinese patent "a method of chemical electroosmosis combined with vacuum preloading method for deep soft soil foundation" [0004] (ZL201110083357.7) discloses a combined electroosmotic method and vacuu...

AI Technical Summary

Problems solved by technology

Although this method can effectively deal with the soil strength of deep soft soil layers, there are mainly the following problems: 1. After reinforcement, the soil strength is low, the settlement deformation is large, and the uniformity is poor. Project quality problems to a certain extent; many buildings in Tianjin Binhai New Area (using vacuum preloading for foundation treatment) have already experienced problems such as uneven settlement

2. Combining electroosmosis and vacuum preloading to treat deep soft soil, the cost is high and the promotion prospect is limited

3. The chemical solution calcium chloride injected in the method will increase the hardness of the water, causing soil salinization and damage to houses and buildings

Although this method increases the bearing capacity after foundation reinforcement and reduces post-construction settlement, there are still some shortcomings: for example, the water circulation heating effect of the U-shaped tube is not obvious, and the upper temperature limit is 100°, and the actual temperature upper limit is far below

[0007] Compared with other ground treatment methods, the electroosmosis method has the advantages of fast time, no noise and dust pollution, safety, and environmental protection. However, this method has limited its wide-scale application due to problems such as high energy consumption and serious electrode corrosion.

Images