Multifunctional compression and consolidation instrument for municipal domestic waste soil and use method

Abstract

The invention discloses a multifunctional compression and consolidation instrument for municipal domestic waste soil and a use method. The multifunctional compression and consolidation instrument comprises a waste soil sample filling system, a constant-temperature steam temperature control system, a pressurizing system and a temperature displacement display system, wherein a waste soil sample can be heated uniformly at an initial period, and the equipment deadweight is lowered by the constant-temperature steam temperature control system. In the multifunctional compression and consolidation instrument, an organic glass barrel is designed with a two-layer structure, namely, a sample room and a temperature monitoring room from top to bottom in sequence; when the temperature monitored by two first temperature sensors in the temperature monitoring room is consistent with the temperature monitored by a second temperature sensor outside the organic glass barrel, a loading test can be performed, so that the defect that the conventional instrument cannot monitor whether the temperature of the sample in the barrel is consistent with the temperature of water outside the barrel or not at an initial loading period is overcome.

Description

technical field [0001] The invention relates to a compression consolidation instrument, in particular to a multifunctional compression consolidation instrument for municipal domestic waste soil and a use method thereof. It belongs to the field of environmental protection technology. Background technique [0002] With the growth of my country's national economy and the increasing degree of urbanization, urban domestic waste has increased dramatically. At present, landfill is an effective way to solve domestic waste in most cities in my country. However, the pile of garbage in the municipal solid waste landfill is very high, as high as 100 meters, and the compressibility is relatively high. The settlement deformation of the landfill is too large, causing damage to the intermediate clay interlayer, covering layer and landfill foundation. At present, the secondary settlement caused by late degradation and the secondary landslide disaster caused by the increase of landfill heig...

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Problems solved by technology

[0003] At present, the municipal solid waste soil compression test still uses the traditional compression tester to carry out the compression test, but the traditional compression tester has the following shortcomings: ① The sample size of the traditional compression tester is small, and the garbage must be crushed to a very small size before it can be carried out Compression test cannot truly reflect the characteristics of high heterogeneity, large void ratio and high compressibility of garbage soil

②The displacement range of the traditional compression tester is too small, which cannot meet the high compressibility requirements of garbage soil

③ When applying multi-level loads, the operation is cumbersome and labor-intensive, and impact force is often generated when loading, which affects the test accuracy

④ Degradation-compression test cannot be carried out

[0004] In recent years, with the promulgation of technical regulations for geotechnical tests of municipal solid waste, some scholars have developed some municipal solid waste soil degradation-compression test instruments according to the technical regulations in the research of municipal solid waste soil to solve the shortcomings of traditional compression instruments, but There are still the following disadvantages: ① Active and passive loading methods are adopted. When applying multi-level loads, they cannot be loaded step by step according to the specified time. The operation is cumbersome, labor-intensive, and automation efficiency is low. Impact force is often generated during loading, which affects the test. Accuracy, large error

②A water bath is usually used for temperature control, which is likely to cause uneven heating in the initial stage and affect the test results and the weight of the equipment is too large

③A water bath is used for temperature control, and the temperature sensor is placed outside the plexiglass cylinder containing the sample, which can only monitor the temperature of the outer wall of the plexiglass cylinder

The temperature of the sample in the plexiglass cylinder at the initial stage of loading is often inconsistent with the temperature of the water outside the cylinder, and the temperature of the sample in the cylinder is lower than that of the water outside the cylinder, which cannot truly reflect the impact of the temperature inside the garbage soil sample on the entire compression degradation test process. influences

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