A Soft Ground Treatment Test Device Simulating Vacuum Combined Gas Injection

Abstract

The invention relates to a soft foundation treatment test device for stimulating vacuum joint gas injection. A transparent sample preparation membrane is tightly fitted to the inner side wall of a test soil box; the transparent sample preparation membrane is used for sealing to form a test cavity which provides a sealed environment for test soft soil; a soil loading hole and a gas exhaust hole, which communicate with the test cavity, are formed in the transparent sample preparation membrane; a gas injection hollow ball is arranged in the test cavity, and a gas injection guide tube communicates with the gas injection hollow ball; and a plastic water draining plate is arranged in the test soft soil and is connected with a water draining guide tube. According to the soft foundation treatment test device, the transparent test soil box and the transparent sample preparation membrane are used for sealing a test soil body, so that the water draining effect in a vacuum pre-compression process and influence effect after pressure gas injection can be intuitively monitored; a rigid loading plate is arranged above the test soft soil, and vertical uniform loading is applied to stimulate soft soil stress environments at different depth positions, so that the soft foundation treatment test device is especially suitable for stimulating a deep and thick soft soil foundation, and can simultaneously implement different vacuum pre-compression and pressure gas injection schemes, and therefore, the soft foundation treatment effect of the vacuum joint gas injection can be stimulated very well.

Description

technical field [0001] The invention relates to the technical field of soft ground treatment, in particular to a soft ground treatment experimental device for simulating vacuum combined gas injection. Background technique [0002] With the vigorous development of the economy and infrastructure of cities along the coast and along the river, as well as further urban development planning, some domestic ports have insufficient land use, and the dredged silt is used for land reclamation or construction of land for docks and ports. This has become an important means of land development. For example, the coastline of Zhejiang Province is 6,696 kilometers, ranking first in the country, and there are 3,061 islands with an area of ​​more than 500 square meters. From the "Tenth Five-Year Plan" to the "Thirteenth Five-Year Plan", the unprecedented development of Zhejiang's coastal port economy has continuously strengthened the construction of corresponding port projects and coastal proj...

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Problems solved by technology

[0003] In recent years, the soft foundation treatment method of vacuum combined with gas injection has been gradually applied in engineering, but its soft foundation treatment effect is affected and restricted by a large number of factors, and its internal gas injection influence mechanism and control technology have not been clearly understood , there is a lack of practical and effective theoretical analysis methods, and there is a lot of blindness in engineering applications, so this method has not been well promoted and applied

In order to make up for the limitations of theoretical analysis, large-area soft foundation treatment projects need to be analyzed in combination with indoor model tests. The key control technology is how to simulate the coupling effect of vacuum and gas injection in soft soil foundations with different depths. Discover the model test rig

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