阅读说明：本技术 一种研究垃圾土降解过程含水率变化规律的室内试验装置 (Indoor test device for researching water content change rule of garbage soil degradation process ) 是由 陈赟 罗敏敏 谢海建 黄家晟 于 2021-08-26 设计创作，主要内容包括：本发明涉及一种研究垃圾土降解过程含水率变化规律的室内试验装置,试验装置包括模型箱体、TDR传感器、温度传感器、滤水层、排水管网。排水管网位于模型箱体的底部,用于收集和排出模型箱体的渗滤液；滤水层位于排水管网的上部,且滤水层包括位于下部的碎石滤层和位于上部的土工织物滤层,滤水层上部提供待研究的垃圾土的放置空间；TDR传感器和温度传感器悬吊在模型箱体中,当待研究的垃圾土放入后,TDR传感器和温度传感器埋设于待研究的垃圾土中。本发明装置可用于室内研究垃圾土在降解过程中的含水率变化规律。(The invention relates to an indoor test device for researching water content change rule in garbage soil degradation process. The drainage pipe network is positioned at the bottom of the model box body and is used for collecting and discharging percolate of the model box body; the water filtering layer is positioned at the upper part of the drainage pipe network and comprises a gravel filtering layer positioned at the lower part and a geotextile filtering layer positioned at the upper part, and the upper part of the water filtering layer provides a placement space for the garbage soil to be researched; the TDR sensor and the temperature sensor are suspended in the model box body, and after the garbage soil to be researched is put into the model box body, the TDR sensor and the temperature sensor are buried in the garbage soil to be researched. The device can be used for indoor research on the change rule of the water content of the garbage soil in the degradation process.)

1. An indoor test device for researching water content change rule in garbage soil degradation process is characterized by comprising a model box body (1), a TDR sensor (2), a temperature sensor (3), a water filtering layer (4) and a drainage pipe network (5);

armored optical fibers (15) are uniformly distributed on the inner wall of the model box body (1) and are used for heating the model box body (1) and controlling the model box body to be in a constant temperature state; the drainage pipe network (5) is positioned at the bottom of the model box body (1) and is used for collecting and discharging percolate of the model box body (1); the water filtering layer (4) is positioned at the upper part of the drainage pipe network (5), the water filtering layer (4) comprises a gravel filtering layer (11) positioned at the lower part and a geotextile filtering layer (12) positioned at the upper part, and the upper part of the water filtering layer (4) provides a placement space for the garbage soil (10) to be researched; the TDR sensor (2) and the temperature sensor (3) are suspended in the model box body (1), and after the garbage soil (10) to be researched is placed in the model box body, the TDR sensor (2) and the temperature sensor (3) are buried in the garbage soil (10) to be researched.

2. The indoor test device for researching the water content change rule in the garbage soil degradation process according to claim 1, wherein the top of the model box body (1) is provided with an exhaust port (7) and a threading hole (8), and wires of the TDR sensor (2) and the temperature sensor (3) and the armored optical fiber (15) penetrate through the threading hole (8).

3. The indoor test device for researching the water content change rule in the garbage soil degradation process according to claim 1, wherein a water outlet hole (9) is formed in the bottom of one side wall of the model box body (1), a drainage pipe network (5) discharges percolate through the water outlet hole (9) in the bottom of the side wall of the model box body (1), and the percolate is collected by an external percolate collecting box (6).

4. The indoor test device for researching the change rule of the water content in the garbage soil degradation process as claimed in claim 1, wherein the water drainage pipes of the water drainage pipe network (5) are densely distributed with water permeable holes (13) at equal intervals.

5. The indoor test device for researching water content change rule in garbage soil degradation process according to claim 3, wherein a switch valve (14) is arranged at the water outlet hole (9) at the bottom of the side wall of the model box body (1), and a gap between the switch valve (14) and the water outlet hole (9) is sealed.

6. The indoor test device for researching water content change rule of garbage soil degradation process as claimed in claim 1, wherein the geotextile filter layer (12) is made of non-woven fabric.

Technical Field

The invention belongs to the field of environmental rock and soil, and particularly relates to an indoor test device for researching the change rule of water content in the degradation process of garbage soil.

Background

With the development of national economy and the trend of people to good life, environmental rock and soil are more and more emphasized, wherein the standardized design and construction of the refuse landfill and the analysis and evaluation of the long-term stability performance of the existing refuse landfill are one of the important contents. The long-term stability of the refuse landfill is closely related to the moisture content of the refuse dump, and the moisture content of the refuse dump is related to the degradation process of the refuse soil, so that the change rule of the moisture content of the refuse soil in the degradation process needs to be researched. To address this problem, the present laboratory test apparatus was developed.

Disclosure of Invention

Aiming at the defects of the existing test equipment, the invention provides an indoor test device for researching the water content change rule of garbage soil in the degradation process, which is used for researching the water content change rule of the garbage soil in the degradation process indoors.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

an indoor test device for researching water content change rule in garbage soil degradation process comprises a model box body, a TDR sensor, a temperature sensor, a water filtering layer and a drainage pipe network;

armored optical fibers are uniformly distributed on the inner wall of the model box body and used for heating the model box body and controlling the model box body to be in a constant temperature state; the drainage pipe network is positioned at the bottom of the model box body and is used for collecting and discharging percolate of the model box body; the water filtering layer is positioned at the upper part of the drainage pipe network and comprises a gravel filtering layer positioned at the lower part and a geotextile filtering layer positioned at the upper part, and the upper part of the water filtering layer provides a containing space for the garbage soil to be researched; the TDR sensor and the temperature sensor are suspended in the model box body, and after the garbage soil to be researched is placed in the model box body, the TDR sensor and the temperature sensor are buried in the garbage soil to be researched.

Furthermore, an air outlet and a threading hole are formed in the top of the model box body, and the TDR sensor, the temperature sensor and the armored optical fiber penetrate out through the threading hole.

Furthermore, a water outlet hole is formed in the bottom of the side wall of one side of the model box body, a drainage pipe network discharges percolate through the water outlet hole in the bottom of the side wall of the model box body, and the percolate is collected by an external percolate collecting box.

Furthermore, the drain pipe of the drain pipe network is densely distributed with water permeable holes at equal intervals.

Furthermore, a switch valve is arranged at a water outlet hole at the bottom of the side wall of the model box body, and a gap between the switch valve and the water outlet hole is sealed.

Further, the geotextile filter layer is made of a non-woven fabric.

Compared with the existing test equipment, the test device provided by the invention has the following beneficial effects:

the existing indoor test research device for the water content of the garbage soil mainly focuses on the research on a water content testing method and precision, and the research on the change rule of the water content of the garbage soil along with time is not related, so that the research and development of the device can make up for the blank, and the indoor model test research on the change rule of the water content in the garbage soil degradation process is realized; meanwhile, the test device can control the temperature and study the influence of the temperature on the degradation process of the waste soil and the change rule of the water content of the waste soil.

Drawings

FIG. 1 is a three-dimensional schematic view of a test apparatus;

FIG. 2 is a schematic three-dimensional view of a drainage layer;

FIG. 3 is a three-dimensional schematic view of a drainage pipe network;

FIG. 4 is a diagram of distribution of armored optical fibers on the inner wall of the mold box.

Illustration of the drawings: 1-model box body, 2-TDR sensor, 3-temperature sensor, 4-water filtering layer, 5-drainage pipe network, 6-leachate collecting box, 7-exhaust port, 8-threading hole, 9-water outlet hole, 10-garbage soil, 11-gravel filter layer, 12-geotextile filter layer, 13-water permeable hole, 14-switch valve and 15-armored optical fiber.

Detailed Description

For further understanding of the contents of the present invention, the present invention will be described in detail with reference to examples, which are provided for the purpose of explanation and are not intended to limit the present invention.

Referring to the attached drawings 1-4, the indoor test device for researching the change rule of the water content in the garbage soil degradation process comprises: model box 1, TDR sensor 2, temperature sensor 3, drainage blanket 4, drainage pipe network 5 and filtration liquid collecting box 6.

The model box body 1 is provided with a drainage pipe network 5 and a water filtering layer 4 from the bottom to the top in sequence, then the upper space of the water filtering layer 4 is filled with garbage soil 10, and the upper parts of the TDR sensor 2 and the temperature sensor 3 are suspended at the top of the model box body 1. The top of the model box body 1 is provided with an exhaust port 7 and a threading hole 8, and the exhaust port 7 is used for exhausting gas generated in the degradation process of the waste soil 10; the threading hole 8 is used for leading the wires of the TDR sensor 2 and the temperature sensor 3 and the armored optical fiber 15 out of the model box body 1 so as to be accessed to a test instrument. After the garbage soil 10 is placed in the model box body 1, the TDR sensor 2 and the temperature sensor 3 are buried in the garbage soil 10 so as to measure the moisture content and the temperature of the garbage soil 10 at different moments and draw a change curve of the moisture content and the temperature along with time. For the present example, the cross-sectional dimensions of the model case 1 were 0.48m × 0.48m, and the case height was 1.2 m.

Armored optical fibers 15 are uniformly distributed on the inner wall of the model box body and are heated through an external heating system, so that the temperature inside the model box body 1 is controlled, and the temperature influence is researched.

A water outlet hole 9 is formed in the bottom of the side wall of one side of the model box body 1, so that a drainage pipe network 5 can discharge percolate through the water outlet hole 9, and the percolate is collected by a percolate collecting box 6; 9 departments of apopore set up switch valve 14, and switch valve 14 is connected with water drainage pipe network 5 to seal the gap between switch valve 14 and apopore 9 and handle, for this embodiment, adopt glass to glue and seal.

The water filtering layer 4 comprises two layers, wherein the lower layer is a gravel filtering layer 11, and the upper layer is a geotextile filtering layer 12. For the present embodiment, the crushed stone filter 11 is made of finely graded crushed soil, and the geotextile filter 12 is made of nonwoven geotextile.

The drain pipe network 5 is densely distributed with the water permeable holes 13 on the drain pipe at equal intervals. For the embodiment, a PVC pipe with the diameter of 25mm is used as a drainage pipe, and a drainage pipe network 5 is formed according to two transverse directions and four longitudinal directions; 1 water permeable hole 13 is arranged in each 5cm mode, the hole diameter is 1cm, and an electric drill is adopted for forming holes.

The principle of the invention is as follows: the electromagnetic waves can be reflected at interfaces of different media, and the TDR sensor based on the surface reflection method can effectively measure the reflection coefficient of the electromagnetic waves at the interface of the air section and the measured soil body; according to the interface reflection coefficient measured by the TDR sensor, the water content of the measured soil body can be obtained through conversion of a corresponding formula; and along with the change of time, the moisture content of the soil body changes, buries the TDR sensor in the soil body, can obtain the change rule of the moisture content of the soil body along with time in real time.

The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.