Model test device and model test for injecting flocculant during dredger fill construction

Abstract

The invention discloses a model test device for injecting flocculant in the construction process of dredging and filling soil. A flocculant conveying pump is arranged in a medicament dispensing chamber. The conveying pipeline is provided with a first flow control valve, and a mud conveying pump is provided in the filling soil sample loading chamber, and the mud conveying pump communicates with the powerful mixing chamber through the second conveying pipe, and the second conveying pipe is provided with a second flow control valve. A valve, an electric agitator is arranged in the powerful stirring chamber, and the powerful stirring chamber is connected with the soil sample collecting chamber through the third conveying pipeline, and the second flow control valve is arranged on the third conveying pipeline. The invention also discloses a model test for injecting the flocculant during the dredging filling soil construction process. The model test device for injecting flocculant in the construction process of dredger filling provided by the present invention has a simple and practical structure, and can completely and accurately simulate the test model for injecting flocculant in the construction process of dredging fill.

Description

technical field [0001] The invention relates to a model test device for injecting flocculant in the construction process of dredging filling soil, which is used for indoor simulation of the blown filling soft soil foundation after the reaction between the flocculant and the vacuum preloading treatment. The invention also relates to the model test of injecting the flocculant during the construction of the dredging and filling soil by using a model test device for injecting the flocculant during the construction of the dredging and filling the soil. Background technique [0002] With the continuous expansion of construction scale in my country's coastal areas, the supply of land resources has become increasingly tense, and tidal flat reclamation has become the main way to obtain land resources. The reclamation of tidal flats often adopts the method of dredging land reclamation, but the dredged fill silt has high moisture content, high fluidity, and extremely low bearing capaci...

AI Technical Summary

Problems solved by technology

There are two main problems in the vacuum preloading method currently used: one is that during the vacuuming process, the vertical drainage plate is seriously clogged, and the vacuum degree is greatly lost in the soil; The coefficient gradually decreases, and the drainage in the later stage is quite difficult

However, in actual engineering, the diameter of the dredger filling soil delivery pipeline is often large and the flow rate of the mud in the pipeline is relatively fast. It is difficult for the flocculant slurry injected through the grouting port to mix evenly with the mud in the pipeline, which may easily cause incomplete flocculation reaction. As a result, the vacuum preloading in the later stage cannot produce obvious treatment effects, and the advantages of flocculation combined with vacuum preloading cannot be exerted.

In addition, the application of the above method is limited to large-area dredger fill construction sites, and the cost of experimental research is high, and it is time-consuming and laborious. How to simulate the process flow of this method in the indoor laboratory, conduct indoor model tests, and further study and improve the flocculation combined with vacuum The theory and technical support related to preloading, such a model test device that injects flocculant at the same time during the construction of dredger fill has not yet appeared.

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