Multifunctional compression consolidation instrument for urban domestic garbage soil and its use method

Abstract

The present invention discloses a multifunctional compression consolidation instrument for urban garbage soil and a method for using the instrument. The instrument comprises: a garbage soil sample filling system, a constant temperature steam temperature control system, a pressurizing system and a temperature displacement display system. The constant temperature steam temperature control system is adopted to make the garbage soil sample evenly heated at the initial stage and reduce the deadweight of the equipment. The present invention designs the organic glass cylinder into a two-layer structure, which is a sample chamber and a temperature monitoring chamber from top to bottom; when the temperature monitored by the two first temperature sensors in the temperature monitoring chamber is consistent with the temperature monitored by the second temperature sensor outside the organic glass cylinder, the loading test can be carried out, which overcomes the disadvantage that the previous instrument cannot monitor whether the temperature of the sample in the cylinder is consistent with the temperature of the water outside the cylinder at the initial stage of loading.

Description

Technical Field

[0001] The invention relates to a compression consolidation instrument, in particular to a multifunctional compression consolidation instrument for urban domestic garbage soil and a use method thereof, belonging to the technical field of environmental protection. Background Art

[0002] With the growth of my country's national economy and the increasing urbanization, the number of urban domestic waste has increased dramatically. At present, landfill is an effective way to solve the problem of domestic waste in most cities in my country. However, the garbage in urban domestic waste landfills is very high, up to 100 meters, with high compressibility. The excessive settlement and deformation of the landfill causes damage to the intermediate clay layer, cover layer and landfill foundation. At present, the secondary settlement problem caused by late degradation and the secondary landslide disaster problem caused by the increase in the height of the landfill are hot issues in the field of environmental geotechnical engineering.

[0003] At present, the compression test of urban domestic garbage soil is still carried out using traditional compression testers, but traditional compression testers have the following shortcomings: ① The sample size of traditional compression testers is small, and the garbage must be crushed to a very small size for compression testing, which cannot truly reflect the characteristics of garbage soil such as high heterogeneity, large void ratio and high compressibility. ② The displacement range of traditional compression testers is small and cannot meet the requirements of high compressibility of garbage soil. ③ When applying multi-level loads, the operation is cumbersome and labor-intensive, and impact force is often generated when loading, affecting the test accuracy. ④ It is impossible to carry out degradation-compression tests.

[0004] In recent years, with the promulgation of the technical regulations for geotechnical tests of domestic waste soil, some scholars have developed some urban domestic waste soil degradation-compression test instruments in accordance with the technical regulations in the study of urban domestic waste soil to solve the shortcomings of traditional compression instruments, but there are still the following shortcomings: ① Active and passive loading methods are used. When applying multi-level loads, it is not possible to load step by step according to the prescribed time. The operation is cumbersome, the labor intensity is high, the automation efficiency is low, and the impact force is often generated when loading, which affects the test accuracy and has large errors. ② A water bath is usually used for temperature control, which is easy to cause uneven heating in the initial stage and affect the test results, and the weight of the equipment is too large. ③ A water bath is used for temperature control, and the temperature sensor is placed outside the plexiglass cylinder containing the sample, and only the temperature of the outer wall of the plexiglass cylinder can be monitored. At the initial stage of loading, the temperature of the sample in the plexiglass cylinder is often inconsistent with the temperature of the water outside the cylinder. The temperature of the sample in the cylinder is lower than the temperature of the water outside the cylinder, and it is impossible to truly reflect the influence of the temperature inside the garbage soil sample on the entire compression degradation test process. Therefore, it is necessary to develop a multifunctional compression consolidation instrument suitable for urban domestic waste soil. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a multifunctional compression consolidation instrument for urban garbage soil.

[0006] The invention also provides a method for using the compression consolidation instrument.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] Multifunctional compression consolidation instrument for urban garbage soil, which includes:

[0009] The garbage soil sample filling system is divided into a sample chamber and a temperature monitoring chamber from top to bottom. The sample chamber is filled with a first portion of garbage soil samples, and a piston is provided on the top of the first portion of garbage soil samples to seal the sample chamber. The temperature monitoring chamber is filled with a second portion of garbage soil samples, and a first temperature sensor is provided inside the second portion of garbage soil samples.

[0010] A constant temperature steam temperature control system, comprising a steam generator, a steam pipe and a constant temperature chamber connected in sequence, wherein the steam pipe is inserted into the constant temperature chamber, the constant temperature chamber wraps the entire garbage soil sample filling system therein, and a second temperature sensor is arranged in the constant temperature chamber;

[0011] A pressurizing system, comprising an air compressor and a pressure head connected thereto, wherein the pressure head is connected to a piston, and a displacement sensor is provided on the top of the pressure head; and

[0012] The temperature displacement display system is connected to the first temperature sensor, the second temperature sensor and the displacement sensor respectively, and is used for collecting and displaying data from each sensor.

[0013] As one of the preferred technical solutions, the compression consolidation instrument also includes a support platform, which is located at the bottom of the constant temperature chamber. A plurality of support rods are provided at the bottom of the support platform, and each support rod is provided with a horizontal adjustment device; a circular level is provided on the support platform, and the horizontal adjustment device includes an adjustment handwheel, which is located on the support rod; a roller is also provided at the bottom of the support rod.

[0014] As one of the preferred technical solutions, the garbage soil sample filling system includes an organic glass cylinder, and the sample chamber and the temperature monitoring chamber are arranged inside the organic glass cylinder.

[0015] As one of the preferred technical solutions, a filter chamber is provided between the sample chamber and the temperature monitoring chamber.

[0016] As one of the further preferred technical solutions, the filter chamber includes a water filter cloth, a ceramic water filter plate and a funnel-shaped liquid collecting tank from top to bottom.

[0017] As one of the further preferred technical solutions, the bottom of the filter chamber is connected to the leachate collection system, the bottom of the collection tank is provided with a leachate outlet, and the leachate collection system includes a nut which is threadedly connected to the leachate outlet.

[0018] As one of the further preferred technical solutions, the temperature monitoring chamber is composed of three columns distributed in a triangle, and its top and bottom are respectively provided with cover plates, namely an upper cover plate and a lower cover plate, and the leachate outlet runs through the central position of the upper cover plate through the central position of the lower cover plate and is connected to the leachate collection system; there are no less than two first temperature sensors, which are evenly distributed around the leachate outlet, and each first temperature sensor is connected in parallel to the temperature displacement display system, which can avoid inaccurate temperature monitoring caused by uneven heating of the garbage soil sample.

[0019] As one of the further preferred technical solutions, the constant temperature chamber includes a thermal insulation shell and a thermal insulation base, the thermal insulation base is located at the bottom of the plexiglass tube and is sealed therewith, and the thermal insulation base, the thermal insulation shell and the outer wall of the plexiglass tube are continuously sealed to form a constant temperature chamber.

[0020] As one of the further preferred technical solutions, a safety valve and a second steam pressure gauge are respectively provided on the top of the heat-insulating shell.

[0021] As one of the preferred technical solutions, a steam valve and a first steam pressure gauge are respectively provided on both sides of the steam pipeline close to the steam generator and the constant temperature chamber.

[0022] As one of the preferred technical solutions, the air compressor is connected to the cylinder through an air pipe, the bottom of the cylinder is connected to the pneumatic telescopic rod, and the pneumatic telescopic rod is connected to the top of the pressure head.

[0023] As one of the further preferred technical solutions, the air cylinder and the pneumatic telescopic rod are respectively fixed on a pressurizing frame, and the pressurizing frame is arranged on a supporting platform.

[0024] As one of the further preferred technical solutions, an air valve and a pressure regulating valve are respectively provided on both sides of the air pipeline close to the air compressor and the air cylinder, and an air pressure gauge is also provided between the two.

[0025] The method for using the above-mentioned multifunctional compression consolidation instrument for urban garbage soil is as follows:

[0026] (1) Load the garbage soil sample into the sample chamber and fill it to the set height. Turn on the steam generator and introduce steam into the constant temperature chamber to control the loading temperature to remain consistent during the test process.

[0027] (2) Turn on the temperature displacement display system and check whether the first temperature sensor, the second temperature sensor and the displacement sensor are working properly. When the temperatures monitored by the first temperature sensor and the second temperature sensor are consistent, proceed to step (3) and start the loading test;

[0028] (3) Turn on the pressurization system, and the air compressor compresses the garbage soil sample in the sample chamber with a set load through the pressure head. When the deformation of the garbage soil sample is less than 0.01 mm after 24 hours, record the pressure value and displacement value, and then return to step (1) to carry out the loading and compression test of the next level of load until all are completed.

[0029] As one of the preferred technical solutions, the garbage soil sample in step (1) is evenly divided into several portions and loaded in layers, so as to carry out a loading compression test with gradually increasing loads.

[0030] As one of the preferred technical solutions, the garbage soil sample in step (1) includes a first part of the garbage soil sample and a second part of the garbage soil sample.

[0031] As one of the preferred technical solutions, before the test, the compression consolidation instrument is first adjusted to a horizontal level, and the circular level circle is centered by adjusting the adjustment hand wheel on the support rod; then the sealing between the piston and the plexiglass cylinder, and between the base and the plexiglass cylinder are checked. Only after confirming that the sealing is good can the garbage soil sample be loaded.

[0032] As one of the preferred technical solutions, in step (1), the garbage soil sample is loaded according to a set density.

[0033] Beneficial effects of the present invention:

[0034] 1. The present invention adopts a constant temperature steam temperature control system, which can make the garbage soil sample evenly heated at the initial stage and reduce the dead weight of the equipment.

[0035] 2. The present invention designs the organic glass cylinder into a two-layer structure, which is a sample chamber and a temperature monitoring chamber from top to bottom; the loading test can be carried out only when the temperature monitored by the two first temperature sensors in the temperature monitoring chamber is consistent with the temperature monitored by the second temperature sensor outside the organic glass cylinder, thereby overcoming the disadvantage that the previous instruments cannot monitor whether the temperature of the sample in the cylinder is consistent with the temperature of the water outside the cylinder at the initial stage of loading.

[0036] 3. If the first temperature sensor is directly buried in the first part of the garbage soil sample, it will affect the precision of the first temperature sensor and even cause damage to the instrument; the present invention buries the first temperature sensor in the second part of the garbage soil sample in the temperature monitoring room. This part of the garbage soil is lighter in weight, and there are covers on the top and bottom of the temperature monitoring room, which effectively avoids the squeezing of the first temperature sensor. At the same time, the heating environment around the first part of the garbage soil sample and the second part of the garbage soil sample is the same, so the first temperature sensor can objectively reflect the internal temperature of the entire garbage soil sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the present invention;

[0038] Figure 2a , Figure 2b and Figure 2c It is a structural diagram of the support platform;

[0039] Figure 3 It is a schematic diagram of the structure of the liquid collecting tank;

[0040] Figure 4a and Figure 4b It is a schematic diagram of the structure of the temperature monitoring room;

[0041] Figure 5 is a plan view of the two first temperature sensors;

[0042] Among them, 1 is a cylinder, 2 is a pneumatic telescopic rod, 3 is a displacement sensor, 4 is a pressure head, 5 is a piston, 6 is a gas collection system, 7 is a second temperature sensor, 8 is a temperature displacement display system, 9 is a heat insulation shell, 10 is a plexiglass cylinder, 11 is a steam hole, 12 is a safety valve, 13 is a second steam pressure gauge, 14 is a steam valve, 15 is a first steam pressure gauge, 16 is a steam generator, 17 is a water filter cloth, 18 is a ceramic water filter plate, 19 is a collector Liquid tank, 20 is the heat-insulating base, 21 is the supporting platform, 22 is the leachate collection system, 23 is the adjusting hand wheel, 24 is the roller, 25 is the first part of the garbage soil sample, 26 is steam, 27 is the pressure regulating valve, 28 is the air pressure gauge, 29 is the air valve, 30 is the air compressor, 31 is the pressurizing frame, 32 is the circular level circle, 33 is the temperature monitoring room, 34 is the cover plate, 35 is the second part of the garbage soil sample, A and B are the two first temperature sensors. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the following description is only for explaining the present invention and does not limit its contents.

[0044] Embodiment 1:

[0045] like Figure 1 The multifunctional compression consolidation instrument for urban garbage soil shown in the figure comprises:

[0046] The garbage soil sample filling system is divided into a sample chamber and a temperature monitoring chamber 33 from top to bottom. The sample chamber is filled with a first portion of garbage soil sample 25, and a piston 5 is provided on the top of the first portion of garbage soil sample 25 to seal the sample chamber. The temperature monitoring chamber 33 is filled with a second portion of garbage soil sample 35, and first temperature sensors A and B are provided inside the second portion of garbage soil sample 35.

[0047] The constant temperature steam temperature control system comprises a steam generator 16, a steam pipe and a constant temperature chamber connected in sequence, the steam pipe protruding into the constant temperature chamber, a plurality of steam holes 11 are arranged on the steam pipe protruding into the constant temperature chamber, and is used to supply steam 26 to the constant temperature chamber, the constant temperature chamber wraps the entire garbage soil sample filling system therein, and a second temperature sensor 7 is arranged in the constant temperature chamber;

[0048] A pressurizing system, comprising an air compressor 30 and a pressure head 4 connected thereto, the pressure head 4 being connected to a piston 5, and a displacement sensor 3 being disposed on the top of the pressure head 4; and

[0049] The temperature displacement display system 8 is respectively connected to the first temperature sensors A and B, the second temperature sensor 7 and the displacement sensor 3, and is used for collecting and displaying data from each sensor.

[0050] Among them, Figure 2a , Figure 2b and Figure 2c As shown, the compression consolidation instrument also includes a support platform 21, which is located at the bottom of the constant temperature chamber. Two support rods are provided at the bottom of the support platform 21, and horizontal adjustment devices are respectively provided on the support rods; a circular level 32 is provided on the support platform 21, and the horizontal adjustment device includes an adjustment hand wheel 23, which is located on the support rod; a roller 24 is also provided at the bottom of the support rod.

[0051] The compression consolidation apparatus further comprises a gas collecting system 6, which is fixed to the top of the constant temperature chamber by a support rod and communicated with the sample chamber.

[0052] The garbage soil sample filling system comprises an organic glass cylinder 10 , and a sample chamber and a temperature monitoring chamber are arranged inside the organic glass cylinder 10 .

[0053] A filter chamber is provided between the sample chamber and the temperature monitoring chamber. The filter chamber includes a water filter cloth 17, a ceramic water filter plate 18 and a funnel-shaped liquid collection tank 19 ( Figure 3 The bottom of the filtration chamber is connected to the leachate collection system. The bottom of the sump 19 is provided with a leachate outlet. The leachate collection system 22 includes a nut which is threadedly connected to the leachate outlet.

[0054] like Figure 4a and Figure 4b As shown, the temperature monitoring chamber 33 is composed of three columns distributed in a triangular shape, and the top and bottom thereof are respectively provided with cover plates 34, namely, an upper cover plate and a lower cover plate. The leachate outlet passes through the central position of the upper cover plate and the central position of the lower cover plate and is connected to the leachate collection system 22; there are two first temperature sensors A and B, which are arranged opposite to each other on both sides of the leachate outlet ( Figure 5 ), the two first temperature sensors A and B are connected in parallel to the temperature displacement display system 8.

[0055] The constant temperature room includes a heat-insulating shell 6 and a heat-insulating base 20. The heat-insulating base 20 is located at the bottom of the organic glass tube 10 and is sealed therewith. The heat-insulating base 20, the heat-insulating shell 6 and the outer wall of the organic glass tube 10 are continuously sealed to form a constant temperature room.

[0056] A safety valve 12 and a second steam pressure gauge 13 are respectively provided on the top of the heat-insulating shell 6 .

[0057] A steam valve 14 and a first steam pressure gauge 15 are respectively provided on both sides of the steam pipeline close to the steam generator 16 and the constant temperature chamber.

[0058] The air compressor 30 is connected to the cylinder 1 through an air pipeline, the bottom of the cylinder 1 is connected to the pneumatic telescopic rod 2, and the pneumatic telescopic rod 2 is connected to the top of the pressure head 4.

[0059] The air cylinder 1 and the pneumatic telescopic rod 2 are respectively fixed on a pressurizing frame 31 , and the pressurizing frame 31 is arranged on a supporting platform 21 .

[0060] An air valve 29 and a pressure regulating valve 27 are respectively provided on both sides of the air pipeline close to the air compressor 30 and the cylinder 1, and an air pressure gauge 28 is also provided between the two.

[0061] The method for using the above-mentioned multifunctional compression consolidation instrument for urban garbage soil is as follows:

[0062] (1) Fill the sample chamber with garbage soil samples until it reaches the set height, turn on the steam generator 16, and introduce steam into the constant temperature chamber to control the loading temperature to remain consistent during the test process;

[0063] (2) Turn on the temperature displacement display system 8 and check whether the first temperature sensors A and B, the second temperature sensor 7 and the displacement sensor 3 are working properly. When the temperatures monitored by the first temperature sensors A and B and the second temperature sensor 7 are consistent, go to step (3) and start the loading test;

[0064] (3) Turn on the pressurization system. The air compressor 30 compresses the garbage soil sample in the sample chamber with a set load through the pressure head 4. When the deformation of the garbage soil sample is less than 0.01 mm after 24 hours, record the pressure value and displacement value, and then return to step (1) to perform the loading and compression test of the next level of load until all are completed.

[0065] The garbage soil sample in step (1) is evenly divided into several parts and loaded in layers, so as to conduct a loading compression test with gradually increasing loads (80 kPa, 180 kPa, 360 kPa, 720 kPa). The garbage soil sample includes a first part garbage soil sample 25 and a second part garbage soil sample 35. The garbage soil sample is loaded according to the set density.

[0066] Before the test, the compression consolidation instrument is first adjusted to a horizontal level, and the circular level circle 32 is centered by adjusting the adjustment hand wheel on the support rod; then the sealing between the piston 5 and the organic glass cylinder 10, and between the base 20 and the organic glass cylinder 10 are checked. Only after confirming that the sealing is good can the garbage soil sample be loaded.

[0067] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. Multifunctional compression consolidation instrument for urban garbage soil, characterized in that: It includes: The garbage soil sample filling system is divided into a sample chamber and a temperature monitoring chamber from top to bottom. The sample chamber is filled with a first portion of garbage soil samples, and a piston is provided on the top of the first portion of garbage soil samples to seal the sample chamber. The temperature monitoring chamber is filled with a second portion of garbage soil samples, and a first temperature sensor is provided inside the second portion of garbage soil samples. A constant temperature steam temperature control system, comprising a steam generator, a steam pipe and a constant temperature chamber connected in sequence, wherein the steam pipe is inserted into the constant temperature chamber, the constant temperature chamber wraps the entire garbage soil sample filling system therein, and a second temperature sensor is arranged in the constant temperature chamber; A pressurizing system, comprising an air compressor and a pressure head connected thereto, wherein the pressure head is connected to a piston, and a displacement sensor is provided on the top of the pressure head; and A temperature displacement display system, which is connected to the first temperature sensor, the second temperature sensor and the displacement sensor respectively, and is used for collecting and displaying data from each sensor; The compression consolidation instrument also includes a support platform, which is located at the bottom of the constant temperature chamber. A plurality of support rods are provided at the bottom of the support platform, and each support rod is provided with a level adjustment device. A circular level is provided on the support platform, and the level adjustment device includes an adjustment hand wheel, which is located on the support rod. A roller is also provided at the bottom of the support rod. The garbage soil sample filling system comprises an organic glass cylinder, and a sample chamber and a temperature monitoring chamber are arranged inside the organic glass cylinder; A filter chamber is provided between the sample chamber and the temperature monitoring chamber; The filter chamber comprises a water filter cloth, a ceramic water filter plate and a funnel-shaped liquid collecting tank from top to bottom; The bottom of the filtration chamber is communicated with a leachate collection system, a leachate outlet is provided at the bottom of the sump, and the leachate collection system comprises a nut which is threadedly connected to the leachate outlet; The temperature monitoring chamber is composed of three columns distributed in a triangular shape, and the top and bottom thereof are provided with cover plates, namely, an upper cover plate and a lower cover plate, respectively. The leachate outlet runs through the central position of the upper cover plate and the central position of the lower cover plate and is connected to the leachate collection system; there are no less than two first temperature sensors, which are evenly distributed around the leachate outlet, and each first temperature sensor is connected in parallel to the temperature displacement display system; The constant temperature room comprises a heat-insulating shell and a heat-insulating base, wherein the heat-insulating base is located at the bottom of the organic glass cylinder and is sealed therewith, and the heat-insulating base, the heat-insulating shell and the outer wall of the organic glass cylinder are continuously sealed to form the constant temperature room.

2. The method for using the multifunctional compression consolidation instrument for urban garbage soil according to claim 1, characterized in that: The specific steps are as follows: (1) Load the garbage soil sample into the sample chamber and fill it to the set height. Turn on the steam generator and introduce steam into the constant temperature chamber to control the loading temperature to remain consistent during the test process. (2) Turn on the temperature displacement display system and check whether the first temperature sensor, the second temperature sensor and the displacement sensor are working properly. When the temperatures monitored by the first temperature sensor and the second temperature sensor are consistent, proceed to step (3) and start the loading test; (3) Turn on the pressurization system, and the air compressor compresses the garbage soil sample in the sample chamber with a set load through the pressure head. When the deformation of the garbage soil sample is less than 0.01 mm after 24 hours, record the pressure value and displacement value, and then return to step (1) to carry out the loading and compression test of the next level of load until all are completed.

3. The method of use according to claim 2, characterized in that: The garbage soil sample in step (1) is evenly divided into several portions and loaded in layers, so as to carry out a loading compression test with gradually increasing loads.

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