Method for testing depth of influence of acid rain on red clay on the basis of pH value test

Abstract

The invention discloses a method for testing depth of an influence of acid rain on red clay on the basis of pH value test. An unsaturated soil leaching and seepage field simulating device is arranged and comprises a leaching solution storage device, a leaching device, a soil leaching simulator and a base solution collector, wherein the leaching solution storage device is placed in a position higher than a side surface direction of the leaching device; the bottom of the leaching solution storage device is connected to the leaching device by a leaching solution conduit with a flow control valve; the leaching device and the soil leaching simulator are diameter-equivalent cylindrical structures; and the leaching device is erected above the soil leaching simulator; and the base solution collector is placed below the soil leaching simulator and used for collecting a leaching solution and testing a pH value of the leaching solution so as to obtain the depth of the influence of the acid rain on the red clay. The method for testing the depth of the influence of the acid rain on the red clay on the basis of pH value test, disclosed by the invention, has the advantages of simplicity in operation and more accurate data; and the situation of an unsaturated soil leaching and seepage field can be simulated, so that more accurate and comprehensive data are obtained through testing the pH value of the leaching solution.

Description

technical field [0001] The technical field of the invention belongs to the field of civil engineering, in particular to a method for testing the depth of influence of acid rain on red clay based on pH value testing. Background technique [0002] Red clay, the clay mineral particles are very fine, and the clay minerals are often attracted by static force, in the form of surface-surface, edge-surface combination, forming an aggregate structure, and the tiny pores in the aggregate are often filled by adsorbed water . Clay minerals have a stable crystalline framework, and the fine particles form a solid aggregate structure. This "unity" effect improves the strength of the soil. The free oxides with a small content have a great influence on the mechanical properties of red clay. The hydrochemical action (ion exchange, redox, etc.) between red clay soil and water is to dissolve the mineral components of the soil, cement or crystallize and precipitate some components, resulting i...

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Problems solved by technology

[0003] In order to study the influence depth of acid rain on red clay, the commonly used method is to bury pipes in the outdoor soil to collect acid rain leaching water, and to surround the test area with soil to prevent lateral loss. However, the research process is too long, the workload is heavy, and a lot of manpower and material resources are needed.

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