CN207528604U - One kind is planted raw eco-concrete device for determining permeation coefficient - Google Patents

Abstract

The utility model discloses a device for measuring water permeability coefficient of bio-ecological concrete, which comprises a measuring system and a water circulation system. The measuring system comprises a measuring barrel (1), a measuring tube (2), a specimen barrel (4), and a water collection bottom tank ( 5), water storage tank (11), water inlet pipe (14), overflow pipe (13), measuring cylinder (8) and electronic balance (9); described water circulation system includes base water collecting tank (18), water pump (19) and Suction pipe (10). The measuring device of the utility model has the advantages of reasonable structure, simple operation, high measuring precision and fast measuring speed, and can be applied to two water permeability test schemes of the constant water head method and the variable water head method at the same time, and the device can meet the recycling of water and save water resource.

Description

A device for measuring water permeability coefficient of planting ecological concrete

technical field

The utility model relates to the technical field of water permeability coefficient measurement, in particular to a planting ecological concrete water permeability coefficient measurement device.

Background technique

Vegetative ecological concrete is mainly composed of porous concrete skeleton, filling nutrient soil, surface guest soil and plants, etc. It is a green ecological concrete that can adapt to the growth of green plants and meet the requirements of green plant operations. Porous concrete is used as the structural skeleton to provide strength support for the structure, and the continuous pores distributed inside it provide space for the growth of plant roots. It has strong water permeability and plant growth performance, and can reduce surface runoff, restore ecology, and purify Water quality and other functions are widely used in road slope protection, roof greening and ecological river and lake construction.

Water permeability coefficient is an important technical parameter of vegetation ecological concrete. Studies have shown that the effective porosity and pore size inside concrete determine the water permeability of plant-growing ecological concrete. At the same time, the larger the pore size and the more effective pores are, the more beneficial it is for the growth of green plants. The water permeability of plant-growing ecological concrete directly reflects the ecological environment of plants. Because of the pore structure characteristics of concrete, it is of great significance to measure the water permeability coefficient of vegetation ecological concrete.

At present, the measurement of the water permeability coefficient of permeable concrete in my country is mainly based on the water permeability coefficient test method in CCJJ/T135-2009 "Technical Regulations for Permeable Cement Concrete Pavement". Chinese patent documents CN202814846U, CN105738269A, CN201247191Y, etc. improve on the basis of the water permeability coefficient test method, and disclose a variety of permeable concrete water permeability coefficient measuring devices respectively. The port is directly pushed in and pulled out, which is easy to cause the surface of the test piece to fall off, and the gap between the side of the test piece and the wall of the measuring barrel is large under this method, which is not conducive to the water-permeable sealing treatment and affects the accuracy of the test results; the traditional water-permeable seal of the test piece uses The process of applying paraffin or polypropylene glue is complicated, and the equipment is not easy to clean in the later stage, which is not conducive to the long-term recycling of the equipment; in addition, because the porosity of ecological concrete is as high as 20%, when using the traditional ecological concrete water permeability test device to test, water The large amount is not conducive to the economical use of water resources.

Therefore, the development of a water permeability coefficient measuring device with simple operation, high measurement accuracy, fast test speed, water saving and environmental protection, and strong applicability is of great significance for promoting the development of plant-growing ecological concrete technology.

The disclosure of the above background technical content is only used to assist in understanding the concept and technical solution of the present utility model, and it does not necessarily belong to the prior art of this patent application. There is no clear evidence that the above content has been disclosed on the filing date of this patent application Under the circumstances, the above background technology should not be used to evaluate the novelty and inventiveness of this application.

Utility model content

The utility model aims at the problems existing in the existing concrete water permeability coefficient measuring device, and provides a planting ecological concrete water permeability coefficient measuring device. The measuring device has the advantages of reasonable structure, simple operation, high measurement accuracy and fast measurement speed, and can be applied to two water permeability test schemes of the constant head method and the variable head method at the same time, and the device can meet the recycling of water and save water resources.

In order to realize the above object, the technical scheme that the utility model adopts is as follows:

A device for measuring water permeability coefficient of planting ecological concrete, including a measuring system and a water circulation system. The measuring system includes a measuring bucket, a measuring tube, a specimen bucket, a water collection bottom tank, a water storage tank, a water inlet pipe, an overflow pipe, a measuring cylinder and an electronic balance The measuring barrel is connected up and down with the test piece barrel and arranged in the water collection bottom tank; the upper part of the measuring barrel is connected with the overflow pipe, the lower part is connected with the water inlet pipe, and the lower end of the measuring barrel is connected with the measuring tube, and the measuring tube is transparent A measuring tube with a scale; the side wall of the water collection bottom tank is respectively provided with a water outlet a and a water outlet b, and the corresponding valve a and valve b are arranged at the water outlet a and the water outlet b, and the water outlet a A measuring cylinder and an electronic balance are arranged below; the water circulation system includes a base water collection tank, a water pump and a water suction pipe; the water circulation system transfers water from the water outlet b and the overflow pipe to the base water collection tank, and the water is introduced into the water storage tank by the water suction pipe through the water pump In the process, water is supplied to the measuring system, the measuring barrel is provided with a water inlet pipe connected to the water storage tank, and the corresponding valve c is set on the water inlet pipe, the test piece is placed in the test piece barrel, and the water storage tank is placed on the Above the base collection tank.

Preferably, the specimen bucket is a detachable specimen bucket.

Preferably, the outside of the test piece barrel is made of stainless steel plates, and two right-angle slots for screw holes are provided in the test piece barrel.

Preferably, the inner wall of the specimen barrel is provided with a rubber layer.

Preferably, the measuring barrel is a rectangular parallelepiped barrel with upper and lower openings.

Compared with the prior art, the utility model has advantages and beneficial effects as follows:

1. The concrete water permeability coefficient measurement device provided by the utility model has reasonable structure, simple operation, high measurement accuracy and fast measurement speed. recycling, saving water resources.

2. This test device adopts a detachable specimen barrel, just put the concrete specimen into the specimen barrel and tighten the screws. At the same time, the inner wall of the specimen barrel is provided with a rubber layer, which can prevent water leakage and protect the The test piece is simple and convenient to operate, and the anti-seepage effect is good, which improves the measurement accuracy.

Description of drawings

Fig. 1 is the structural representation of the utility model concrete water permeability measuring device;

Fig. 2 is a schematic structural view of the test piece bucket of the present invention.

Drawings: 1-Measuring barrel; 2-Measuring tube; 3-Specimen; 4-Specimen barrel; 5-Collecting bottom tank; 6-Valve a; 7-Water outlet a; ;10-drawing pipe; 11-water storage tank; 12-support; 13-overflow pipe; 14-inlet pipe; 15-valve c; 16-valve b; 17-water outlet b; pump.

Detailed ways

The utility model will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following descriptions are only illustrative, not intended to limit the scope of the present utility model and its application.

Example 1

As shown in accompanying drawing 1, the device for determining water permeability of plant-growing ecological concrete described in the utility model includes a measurement system and a water circulation system, and the measurement system includes a measurement bucket 1, a measurement tube 2, a test piece bucket 4, and a water collection bottom tank 5 , water storage tank 11, water inlet pipe 14, overflow pipe 13, measuring cylinder 8 and electronic balance 9; Described measuring bucket 1 is connected up and down with specimen bucket 4 and is located in the water collection bottom tank 5, and measuring bucket 1 is a cuboid bucket with upper and lower openings Structure; the upper part of the measuring barrel 1 is connected to the overflow pipe 13, the lower part is connected to the water inlet pipe 14, the lower end of the measuring barrel 1 is connected to the measuring tube 2, and the measuring tube 2 is a transparent measuring tube with a scale for reading Measure the water level height in the barrel; the side wall of the water collecting bottom tank 5 is respectively provided with a water outlet a7 and a water outlet b17, and corresponding valves a6 and b16 are provided at the water outlet a7 and the water outlet b17, and at the water outlet a7 Below is provided with measuring cylinder 8 and electronic balance 9; Described water circulation system comprises base water collecting tank 18, water pump 19 and water pumping pipe 10; 19. The water is introduced into the water storage tank 11 by the pumping pipe 10 to supply water to the measuring system. The measuring barrel 1 is provided with a water inlet pipe 14 connected to the water storage tank 11. A corresponding valve c15 is set on the water inlet pipe 14, and the test piece 3 Placed in the specimen bucket 4, the water storage tank 11 is placed above the base water collection tank 18 through a bracket.

As shown in Figure 2, the outside of the test piece barrel 4 is made of stainless steel plates, the inner wall is provided with a rubber layer, and the test piece barrel 4 is provided with two right-angled slots C1 and C2 for screw holes. Since the specimen barrel 4 is a detachable specimen barrel, you only need to put the concrete specimen into the specimen barrel and tighten the screws. At the same time, the inner wall of the specimen barrel is provided with a rubber layer, which can prevent water leakage and The test piece is simple and convenient to operate, and the anti-seepage effect is good, which improves the measurement accuracy.

The water permeability coefficient measuring device of the vegetation ecological concrete of the utility model is suitable for two test methods of a constant water head method and a variable water head method.

The constant water head method is to measure the flow rate Q flowing through the test piece after a time of ▽t under a fixed water head H. Referring to the accompanying drawing 1 for specific implementation, open the valve a6, close the valve b16, and start to inject water into the water storage tank 11. The water is injected into the measuring bucket 1 through the water inlet pipe, and flows through the test piece into the water collection bottom tank 5, and flows out from the water outlet a7. , and the upper part of the measuring barrel 1 is connected to the overflow pipe 13 to ensure the stability of the liquid level in the measuring barrel 1. After the liquid level in the measuring barrel 1 and the water collection bottom tank 5 is stable, the head difference between the two liquid levels is H, the thickness of the test piece is L, the cross-sectional area is A, and the reading Q of the measuring cylinder 8 is measured within the measurement time.

According to Darcy's formula, the formula for calculating the water permeability coefficient of vegetation ecological concrete is as follows:

In the formula:

K——water permeability coefficient of the sample (mm/s);

Q——the amount of water permeated within ▽t time (mm ³ );

L——thickness of test piece (mm);

A - the upper surface area of the concrete specimen (mm ² );

H——water level difference (mm);

▽t——time (s).

The water permeability coefficient of vegetation ecological concrete is expressed as the average value of the results of three concrete specimens.

The variable water head method is to calculate the water permeability coefficient of vegetation ecological concrete by measuring the time T used for a certain water level drop H. Referring to accompanying drawing 1 for specific implementation, open the valve a6, close the valve b16, start to pour water into the water storage tank 11, the water is injected into the measuring bucket 1 through the water inlet pipe 14, and flows through the test piece 3 into the water collection bottom tank 5, and is discharged from the water outlet a7 flows out, and the upper part of the measuring barrel 1 is connected with the overflow pipe 13 to ensure the stability of the liquid level in the measuring barrel 1. After the liquid level in the measuring tank 1 and the water collection bottom tank 5 is stable, read the reading h ₁ of the measuring tube 9 at this time, close the valve c15, stop the water intake, and start timing. When the water level in the measuring tank 1 drops to h ₂ , record the time T at this time. The formula of water permeability coefficient of vegetation ecological concrete is as follows:

In the formula:

K——water permeability coefficient of the sample (mm/s);

h ₁ ——Measure the water level in the barrel at 0 time (mm);

h ₂ ——Measuring the water level in the bucket at time T (mm);

T——test time (s);

The test results of the water permeability coefficient of vegetative ecological concrete are expressed as the average value of the results of three concrete specimens.

The above content is a further detailed description of the utility model in combination with specific/preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make some substitutions or modifications to the described embodiments, and these substitutions or modifications should be Be deemed to belong to the protection scope of the present utility model.

Claims (5)

1. one kind is planted raw eco-concrete device for determining permeation coefficient, including measuring system and water circulation system, it is characterised in that： The measuring system includes measuring bucket (1), measurement pipe (2), test specimen bucket (4), the kerve that catchments (5), water tank (11), water inlet pipe (14), overflow pipe (13), graduated cylinder (8) and electronic balance (9)；The measurement bucket (1) is vertically connected with test specimen bucket (4) and is located at collection In water-bed slot (5)；Measurement bucket (1) top is connect with overflow pipe (13), and lower part is connect with water inlet pipe (14), measures bucket (1) Lower end is connected with measurement pipe (2), and the measurement pipe (2) is the graduated measurement pipe of oolemma；On the kerve that catchments (5) side wall Water outlet a (7) and water outlet b (17) are respectively equipped with, and in water outlet a (7) and water outlet b (17) equipped with corresponding valve a (6), valve b (16) are equipped with graduated cylinder (8) and electronic balance (9) in the lower section of water outlet a (7)；The water circulation system includes bottom Seat header tank (18), water pumper (19) and drinking-water pipe (10)；Water circulation system is from water outlet b (17) and overflow pipe (13) to pedestal Water delivery in header tank (18) is directed water by drinking-water pipe (10) in water tank (11) by water pumper (19), is supplied to measuring system Water, the bucket (1) that measures are equipped with the water inlet pipe (14) being connect with water tank (11), corresponding valve are set on water inlet pipe (14) Door c (15), test specimen (3) are positioned in test specimen bucket (4), and the water tank (11) is placed on the upper of pedestal header tank (18) by branch Side.

2. raw eco-concrete device for determining permeation coefficient is planted according to claim 1, it is characterised in that：The test specimen bucket (4) it is detachable test specimen bucket.

3. raw eco-concrete device for determining permeation coefficient is planted according to claim 2, it is characterised in that：The test specimen bucket (4) it is external to be formed for stainless steel plate, and set the right angle card slot there are two screw hole in test specimen bucket (4).

4. raw eco-concrete device for determining permeation coefficient is planted according to claim 3, it is characterised in that：The test specimen bucket (4) inner wall is equipped with rubber layer.

5. raw eco-concrete device for determining permeation coefficient is planted according to claim 1, it is characterised in that：The measurement bucket (1) it is upper and lower opening cuboid barrel structure.