Loess matrix leakage coefficient surveying and measuring structure

Abstract

The utility model provides a loess matrix leakage coefficient surveying and measuring structure, which comprises at least two groups of measuring mechanisms, the high-level water tank is arranged above the measuring mechanism; the measuring mechanism comprises a first barrel and a second barrel, a sampling barrel is arranged in the first barrel, water seepage mechanisms are arranged at the two ends of the sampling barrel respectively, first communicating pipes are further arranged between the high-level water tank and the first barrel respectively, and the first communicating pipes convey water in the high-level water tank to the top of the first barrel. According to the utility model, the at least two groups of measuring mechanisms are used for measuring simultaneously, so that accidental errors are avoided; after the sampling barrel is used for sampling, the water seepage mechanisms are sequentially mounted at the two ends of the sampling barrel, so that a to-be-detected sample in the sampling barrel can be kept stable, the to-be-detected sample can be directly arranged in the first barrel body after the water seepage mechanisms are mounted, the leakage coefficient can be measured, other processes are omitted, and the error influence in the transfer process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of soil permeability coefficient measurement, in particular to a loess matrix leakage coefficient survey and measurement structure. Background Art

[0002] In engineering construction, the permeability coefficient is surveyed and measured according to the characteristics of the soil in the loess area and the engineering requirements to evaluate the permeability of the soil; in the existing measurement methods, laboratory measurement and field measurement are usually adopted; among them, when conducting indoor tests, the original soil samples on site will be affected by the transportation and sealing effects, which will cause errors to a certain extent; among them, field measurements require a lot of time and economic costs; a Chinese patent (publication number CN218956360U) discloses a test device for quickly measuring the permeability coefficient of original soil, which can reasonably control the air pressure in the container by adjusting the knob of the air compressor, directly calculate the water head of the pressure measuring tube through the value on the air compressor, and can also accelerate the entire seepage process by increasing the air pressure; however, its measurement results are easily affected by accidental errors. Therefore, the utility model proposes a loess matrix leakage coefficient survey and measurement structure to improve the above problems. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the loess matrix leakage coefficient survey and measurement structure in the prior art is easily subject to accidental errors, thereby providing a loess matrix leakage coefficient survey and measurement structure.

[0004] In order to solve the above problems, the utility model provides a loess matrix leakage coefficient survey and measurement structure, which includes:

[0005] The measuring mechanism is provided with at least two groups, respectively measuring the leakage coefficient of the sample to be tested;

[0006] A high-level water tank is arranged above the measuring mechanism to replenish water to the measuring mechanism;

[0007] The measuring mechanism comprises: a first cylinder and a second cylinder, wherein the second cylinder is arranged above the first cylinder and connected to the first cylinder, a sampling cylinder is arranged in the first cylinder, the sampling cylinder and the first cylinder are detachably connected, and water seepage mechanisms are arranged at both ends of the sampling cylinder, the water seepage mechanisms and the two ends of the sampling cylinder are detachably connected; water flows from the top of the first cylinder through the two water seepage mechanisms respectively to the second cylinder;

[0008] A first connecting pipe is also provided between the high-position water tank and the first cylinder, and the first connecting pipe transports the water in the high-position water tank to the top of the first cylinder.

[0009] Preferably, the water seepage mechanism comprises a protective cover, the interior of the protective cover is a hollow structure, a plurality of water seepage holes are evenly arranged on the top and bottom of the protective cover, and the interior of the protective cover is filled with a permeable geotextile.

[0010] Preferably, both ends of the sampling cylinder are respectively provided with a first assembly part, one end of the protective cover is provided with a second assembly part adapted to the first assembly part, and the protective cover and the sampling cylinder are detachably connected through the first assembly part and the second assembly part.

[0011] Preferably, a water-permeable cylinder is further provided at the bottom of the first cylinder body, the interior of the water-permeable cylinder is a hollow structure, the bottom of the water-permeable cylinder is provided with an arc surface, and the top and bottom of the water-permeable cylinder are evenly provided with a plurality of water-permeable holes.

[0012] Preferably, the bottom of the first cylinder is provided with an abutment portion, and the bottom of the water-permeable cylinder abuts against the abutment portion.

[0013] Preferably, it also includes: a lower-level water tank, which is arranged below the high-level water tank, and a plurality of support rods are arranged between the lower-level water tank and the high-level water tank, and the two ends of the support rods are respectively connected to the high-level water tank and the lower-level water tank, and a second connecting pipe is also arranged between the high-level water tank and the lower-level water tank, one end of the second connecting pipe passes through the bottom of the high-level water tank, and the other end of the second connecting pipe is connected to the lifting pump arranged in the lower-level water tank.

[0014] Preferably, one end of the first connecting pipe extends into the bottom of the high-level water tank, and the other end of the first connecting pipe extends into the top of the first cylinder;

[0015] A third connecting pipe is respectively arranged between the high-level water tank and the second cylinder, one end of the third connecting pipe extends into the bottom of the high-level water tank, and the other end of the third connecting pipe extends into the bottom of the second cylinder;

[0016] A fourth connecting pipe is respectively arranged between the second cylinder and the lower water tank, one end of the fourth connecting pipe extends into the top of the second cylinder, and the other end of the fourth connecting pipe extends into the top of the lower water tank, and a tube flow meter is respectively arranged on the fourth connecting pipe;

[0017] A fifth connecting pipe is respectively arranged between the first cylinder and the lower water tank, one end of the fifth connecting pipe extends into the top of the first cylinder, and the other end of the fifth connecting pipe extends into the lower water tank.

[0018] Preferably, the first connecting pipes are respectively provided with first stop valves, and the third connecting pipes are respectively provided with second stop valves.

[0019] Preferably, the outer wall of the high-level water tank is also provided with a liquid filling port, and the bottom outer wall of the lower-level water tank is provided with a liquid discharge port.

[0020] The loess matrix leakage coefficient survey and measurement structure provided by the utility model has the following beneficial effects:

[0021] 1. The utility model measures at the same time by at least two groups of measuring mechanisms, thereby avoiding accidental errors. After the sampling is completed by using the sampling tube, the water seepage mechanism is installed at both ends of the sampling tube in sequence, so that the stability of the sample to be measured in the sampling tube can be maintained. After the water seepage mechanism is installed, it can be directly placed in the first cylinder to measure the leakage coefficient, thereby eliminating other processes and avoiding the influence of errors during transportation.

[0022] 2. The utility model also facilitates water to flow into the second cylinder through the arc surface at the bottom of the water-permeable cylinder after entering the first cylinder, thereby preventing water from gathering in the water-permeable cylinder;

[0023] 3. The utility model also recycles the water used in the measurement process through the lower water tank, and at the same time connects it with the high-level water tank through the second connecting pipe, and uses a lifting pump to transport the water in the lower water tank to the high-level water tank and re-apply it to the measurement to avoid wasting water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the general assembly of the utility model;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 3 It is a cross-sectional view of the measuring mechanism of the utility model;

[0027] Figure 4 This is a schematic diagram of the installation of the protective cover structure of the utility model;

[0028] Figure 5 This is a schematic diagram of the installation structure of the first assembly part of the utility model.

[0029] The reference numerals are as follows:

[0030] 1. High-level water tank; 2. First cylinder; 3. Second cylinder; 4. Sampling cylinder; 5. First connecting pipe; 6. Protective cover; 7. Water seepage hole; 8. First assembly part; 9. Second assembly part; 10. Water-permeable cylinder; 11. Water-permeable hole; 12. Abutment part; 13. Lower-level water tank; 14. Second connecting pipe; 15. Third connecting pipe; 16. Fourth connecting pipe; 17. Tube flowmeter; 18. Fifth connecting pipe; 19. First stop valve; 20. Second stop valve. DETAILED DESCRIPTION

[0031] like Figure 1-5 As shown, the utility model provides a loess matrix leakage coefficient survey and measurement structure, which includes:

[0032] The measuring mechanism is provided with at least two groups, respectively measuring the leakage coefficient of the sample to be tested;

[0033] A high-level water tank 1 is arranged above the measuring mechanism to replenish water to the measuring mechanism;

[0034] The measuring mechanism comprises: a first cylinder 2 and a second cylinder 3, wherein the second cylinder 3 is arranged above the first cylinder 2 and the second cylinder 3 is connected to the first cylinder 2, a sampling cylinder 4 is arranged in the first cylinder 2, the sampling cylinder 4 and the first cylinder 2 are detachably connected, and water seepage mechanisms are respectively arranged at both ends of the sampling cylinder 4, and the water seepage mechanisms and the two ends of the sampling cylinder 4 are detachably connected; water flows from the top of the first cylinder 2 through the two water seepage mechanisms to the second cylinder 3;

[0035] A first connecting pipe 5 is also provided between the high-level water tank 1 and the first cylinder 2, and the first connecting pipe 5 transports the water in the high-level water tank 1 to the top of the first cylinder 2. Figure 1-5As shown, the structure for surveying and measuring the leakage coefficient of loess matrix includes: at least two groups of measuring mechanisms and a high-level water tank 1, wherein the high-level water tank 1 is installed above the measuring mechanism to supplement water for the measuring mechanism by utilizing the advantage of gravitational potential energy, so as to facilitate the measuring mechanism to measure the leakage coefficient of the sample to be measured, and to avoid accidental errors by measuring simultaneously through at least two groups of measuring mechanisms; wherein the measuring mechanism includes a first cylinder 2, a second cylinder 3 and a sampling cylinder 4, wherein the second cylinder 3 is installed above the first cylinder 2, the first cylinder 2 and the second cylinder 3 are connected, and the sampling cylinder 4 is detachably connected in the first cylinder 2, so that the sampling cylinder 4 can be placed in the first cylinder 2 after sampling for measurement, and water seepage mechanisms are installed at both ends of the sampling cylinder 4, respectively, which can allow water to pass through, but can maintain the stability of soil and silt to prevent their loss, so as to provide stability for them. The measurement environment; wherein, the two ends of the water seepage mechanism and the sampling tube 4 are detachably connected. When sampling is performed, after the sampling is completed using the sampling tube 4, the stability of the sample to be measured in the sampling tube 4 can be maintained by installing the water seepage mechanism and the two ends of the sampling tube 4 in sequence. After the water seepage mechanism is installed, it can be directly placed in the first cylinder 2 to measure the leakage coefficient, which eliminates other processes and avoids the influence of errors in the transportation process; after it is installed, the first connecting pipe 5 between the high-level water tank 1 and the first cylinder 2 is used to send water to the top of the first cylinder 2. The water entering the top of the first cylinder 2 forms a water layer at the water seepage mechanism on the sampling tube 4. The water can pass through the two water seepage mechanisms and the sample to be measured in the sampling tube 4 from the top of the first cylinder 2 and then flow to the first cylinder 2. The water seepage flow rate can be known by measuring the water entering the second cylinder 3.

[0036] In some embodiments, the water seepage mechanism includes a protective cover 6, the interior of the protective cover 6 is a hollow structure, the top and bottom of the protective cover 6 are evenly provided with a plurality of water seepage holes 7, and the interior of the protective cover 6 is filled with a permeable geotextile. Figure 1-5 As shown, the water seepage mechanism includes a protective cover 6, the interior of the protective cover 6 is a hollow structure, and multiple layers of permeable geotextiles are filled therein so that water can enter from a number of seepage holes 7 on the top of the protective cover 6, and then pass through the multiple layers of permeable geotextiles, and then pass through the multiple seepage holes 7 on the bottom of the protective cover 6; wherein, the permeable geotextile is commercially available, so that water can pass through, thereby preventing the loss of soil and sediment and avoiding affecting the measurement results; wherein, after the protective cover 6 takes samples from the sampling tube 4, the stability of the sample to be measured in the sampling tube 4 can be maintained, and the safety of the transportation of the sampling tube 4 can be ensured, and the sample can be placed in the first cylinder 2 directly for measurement, thereby avoiding other processes and improving the efficiency of the measurement.

[0037] In some embodiments, the two ends of the sampling tube 4 are respectively provided with a first assembly portion 8, one end of the protective cover 6 is provided with a second assembly portion 9 adapted to the first assembly portion 8, and the protective cover 6 and the sampling tube 4 are detachably connected through the first assembly portion 8 and the second assembly portion 9. Figure 1-5 As shown, a first assembly part 8 is provided at both ends of the sampling barrel 4, and a second assembly part 9 adapted to the first assembly part 8 is provided on the protective cover 6. The first assembly part 8 and the second assembly part 9 are arranged to be snap-fitted with a block and a slot or screw-fitted with corresponding threaded circles to realize snap-fitting or screw-fitting of the first assembly part 8 and the second assembly part 9, so as to realize a detachable connection between the sampling barrel 4 and the protective cover 6.

[0038] In some embodiments, a water-permeable cylinder 10 is further disposed at the bottom of the first cylinder 2. The interior of the water-permeable cylinder 10 is a hollow structure. The bottom of the water-permeable cylinder 10 is provided with an arc surface. The top and bottom of the water-permeable cylinder 10 are evenly provided with a plurality of water-permeable holes 11. Figure 1-5 As shown, a water-permeable cylinder 10 is arranged at the bottom of the first cylinder 2. The interior of the water-permeable cylinder 10 is a hollow structure. The water-permeable holes 11 at the top and bottom of the water-permeable cylinder 10 facilitate water to pass through the top of the water-permeable cylinder 10 into the interior of the water-permeable cylinder 10, and then pass through the bottom of the water-permeable cylinder 10 to enter the second cylinder 3. The arc-shaped surface at the bottom of the water-permeable cylinder 10 facilitates water to flow to the second cylinder 3 through the arc-shaped surface after flowing into the first cylinder 2, thereby preventing it from gathering in the water-permeable cylinder 10.

[0039] In some embodiments, the bottom of the first cylinder 2 is provided with an abutment portion 12, and the bottom of the water-permeable cylinder 10 abuts against the abutment portion 12. Figure 1-5 As shown, the abutment 12 at the bottom of the first cylinder 2 is convenient for the bottom of the water-permeable cylinder 10 to be placed on it. After the relative position of the water-permeable cylinder 10 in the first cylinder 2 is fixed, the sampling cylinder 4 is conveniently placed on it, so that the protective cover 6 under the sampling cylinder 4 abuts against the water-permeable cylinder 10 to fix the position of the sampling cylinder 4 in the first cylinder 2. The arrangement of the water-permeable cylinder 10 allows the water of the sample to be tested in the sampling cylinder 4 to flow to the second cylinder 3, and the measurement can be continuously carried out.

[0040] In some embodiments, it also includes: a lower water tank 13, the lower water tank 13 is arranged below the high water tank 1, a plurality of support rods are arranged between the lower water tank 13 and the high water tank 1, the two ends of the support rods are respectively connected to the high water tank 1 and the lower water tank 13, a second connecting pipe 14 is also arranged between the high water tank 1 and the lower water tank 13, one end of the second connecting pipe 14 penetrates to the bottom of the high water tank 1, and the other end of the second connecting pipe 14 is connected to the lifting pump arranged in the lower water tank 13. Figure 1-5As shown, the lower water tank 13 is arranged below the high-level water tank 1. The lower water tank 13 recycles the water used in the measurement process, and is connected to the high-level water tank 1 through the second connecting pipe 14. The water in the lower water tank 13 is transported back to the high-level water tank 1 by a lifting pump, and is re-applied to the measurement to avoid wasting water resources. The lifting pump is commercially available and is powered by an external power supply. The lower water tank 13 and the high-level water tank 1 are directly supported by multiple support rods.

[0041] In some embodiments, one end of the first connecting pipe 5 extends into the bottom of the high-level water tank 1, and the other end of the first connecting pipe 5 extends into the top of the first cylinder 2; a third connecting pipe 15 is respectively provided between the high-level water tank 1 and the second cylinder 3, one end of the third connecting pipe 15 extends into the bottom of the high-level water tank 1, and the other end of the third connecting pipe 15 extends into the bottom of the second cylinder 3; a fourth connecting pipe 16 is respectively provided between the second cylinder 3 and the lower-level water tank 13, one end of the fourth connecting pipe 16 extends into the top of the second cylinder 3, and the other end of the fourth connecting pipe 16 extends into the top of the lower-level water tank 13, and a tube flowmeter 17 is respectively provided on the fourth connecting pipe 16; a fifth connecting pipe 18 is respectively provided between the first cylinder 2 and the lower-level water tank 13, one end of the fifth connecting pipe 18 extends into the top of the first cylinder 2, and the other end of the fifth connecting pipe 18 extends into the lower-level water tank 13. Figure 1-5 As shown, when conducting the measurement, after placing the sampling tube 4 in the first cylinder 2, the high-level water tank 1 is used to replenish water into the second cylinder 3 through the third connecting pipe 15, until the water starts to flow from the fourth connecting pipe 16 to the lower water tank, the replenishment of water from the third connecting pipe 15 to the second cylinder 3 is stopped. At this time, the water level in the second cylinder 3 is maintained at the fourth connecting pipe 16. When new water flows in, it will flow out through the fourth connecting pipe 16; secondly, the first connecting pipe 5 is used to replenish water in the first cylinder 2 respectively. When the water in the first cylinder 2 reaches the mouth of the fifth connecting pipe 18, the first connecting pipe 5 can be stopped from continuing to replenish water, and water infiltration under static conditions can be simulated at this time; or the first connecting pipe 5 can be continued to be used When water is replenished in pipe 5, excess water will flow from the fifth connecting pipe 18 to the lower water tank 13. At this time, the infiltration of water under dynamic conditions can be simulated; when the water in the first cylinder 2 begins to infiltrate and infiltrate into the second cylinder 3, the water level in the second cylinder 3 begins to rise, and the water flows from the fourth connecting pipe 16 to the lower water tank 13. After the water flow in the fourth connecting pipe 16 is stable, the timing measurement is started by using the tubular flow meter 17 to obtain the infiltration flow rate at the corresponding time, and then the corresponding leakage coefficient can be calculated by using the measurement formula of the constant head experimental method in the prior art; wherein, the tubular flow meter is commercially available; and then the measured values ​​of multiple measuring mechanisms are averaged to obtain the final leakage coefficient of the sample to be tested.

[0042] In some embodiments, the first connecting pipe 5 is provided with a first stop valve 19, and the third connecting pipe 15 is provided with a second stop valve 20. Figure 1-5 As shown, the first stop valve 19 on the first connecting pipe 5 is convenient for controlling whether the first connecting pipe 5 continues to add water into the first cylinder 2 to simulate a static or dynamic test environment, wherein the second stop valve 20 controls whether the high-level water tank 1 continues to add water into the second cylinder 3.

[0043] In some embodiments, the outer wall of the high-level water tank 1 is also provided with a liquid filling port, and the bottom outer wall of the lower-level water tank 13 is provided with a liquid discharge port. Figure 1-5 As shown, the liquid filling port on the outer wall of the high-level water tank 1 is convenient for replenishing water therein before measurement, and the bottom outer wall of the lower-level water tank 13 is provided with a liquid discharge port, which is convenient for draining the water from the high-level water tank 1 to the lower-level water tank 13 after the measurement is completed.

[0044] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the utility model, and these improvements and variations should also be regarded as the protection scope of the utility model.

Claims

1. The structure for surveying and measuring the leakage coefficient of loess matrix is ​​characterized by: include: The measuring mechanism is provided with at least two groups, respectively measuring the leakage coefficient of the sample to be tested; A high-level water tank is arranged above the measuring mechanism to replenish water to the measuring mechanism; The measuring mechanism comprises: a first cylinder and a second cylinder, wherein the second cylinder is arranged above the first cylinder and connected to the first cylinder, a sampling cylinder is arranged in the first cylinder, the sampling cylinder and the first cylinder are detachably connected, and water seepage mechanisms are arranged at both ends of the sampling cylinder, the water seepage mechanisms and the two ends of the sampling cylinder are detachably connected; water flows from the top of the first cylinder through the two water seepage mechanisms respectively to the second cylinder; A first connecting pipe is also provided between the high-position water tank and the first cylinder, and the first connecting pipe transports the water in the high-position water tank to the top of the first cylinder.

2. The loess matrix leakage coefficient survey and measurement structure according to claim 1 is characterized in that: The water seepage mechanism comprises a protective cover, the interior of the protective cover is a hollow structure, a plurality of water seepage holes are evenly arranged on the top and the bottom of the protective cover, and the interior of the protective cover is filled with a permeable geotextile.

3. The loess matrix leakage coefficient survey and measurement structure according to claim 2 is characterized in that: Both ends of the sampling cylinder are respectively provided with first assembly parts, one end of the protective cover is provided with a second assembly part adapted to the first assembly part, and the protective cover and the sampling cylinder are detachably connected via the first assembly part and the second assembly part.

4. The loess matrix leakage coefficient survey and measurement structure according to claim 1, characterized in that: A water-permeable cylinder is also arranged at the bottom of the first cylinder body. The interior of the water-permeable cylinder is a hollow structure. The bottom of the water-permeable cylinder is arranged with an arc surface. The top and bottom of the water-permeable cylinder are evenly arranged with a plurality of water-permeable holes.

5. The loess matrix leakage coefficient survey and measurement structure according to claim 4 is characterized in that: The bottom of the first cylinder is provided with an abutment portion, and the bottom of the water-permeable cylinder abuts against the abutment portion.

6. The loess matrix leakage coefficient survey and measurement structure according to claim 1, characterized in that: It also includes: a lower water tank, which is arranged below the high-level water tank, and a plurality of support rods are arranged between the lower water tank and the high-level water tank, and the two ends of the support rods are respectively connected to the high-level water tank and the lower water tank, and a second connecting pipe is also arranged between the high-level water tank and the lower water tank, and one end of the second connecting pipe passes through the bottom of the high-level water tank, and the other end of the second connecting pipe is connected to the lifting pump arranged in the lower water tank.

7. The structure for surveying and measuring the leakage coefficient of loess matrix according to claim 6, characterized in that: One end of the first connecting pipe extends into the bottom of the high-level water tank, and the other end of the first connecting pipe extends into the top of the first cylinder; A third connecting pipe is respectively arranged between the high-level water tank and the second cylinder, one end of the third connecting pipe extends into the bottom of the high-level water tank, and the other end of the third connecting pipe extends into the bottom of the second cylinder; A fourth connecting pipe is respectively arranged between the second cylinder and the lower water tank, one end of the fourth connecting pipe extends into the top of the second cylinder, and the other end of the fourth connecting pipe extends into the top of the lower water tank, and a tube flow meter is respectively arranged on the fourth connecting pipe; A fifth connecting pipe is respectively arranged between the first cylinder and the lower water tank, one end of the fifth connecting pipe extends into the top of the first cylinder, and the other end of the fifth connecting pipe extends into the lower water tank.

8. The structure for surveying and measuring the leakage coefficient of loess matrix according to claim 7, characterized in that: The first connecting pipes are respectively provided with first stop valves, and the third connecting pipes are respectively provided with second stop valves.

9. The structure for surveying and measuring the leakage coefficient of loess matrix according to claim 6, characterized in that: The outer wall of the high-level water tank is also provided with a liquid filling port, and the bottom outer wall of the lower-level water tank is provided with a liquid discharge port.

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