An integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection

Abstract

The present invention discloses an integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection, comprising: a slope protection structure simulation container for placing planted concrete and slope protection structure layer materials; a water injection system for injecting water into the slope protection structure simulation container; a vacuum system for vacuuming the slope protection structure simulation container; a drilling system for drilling holes in the planted concrete in the slope structure simulation container; an overflow system for the hydraulic gradient of the slope protection structure simulation container; and a permeability metering system for metering the permeated water in the slope protection structure simulation container. The present invention provides an integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection, which achieves integration of forming and measurement, so that the forming of planted concrete and the permeability coefficient measurement can be realized in an indoor environment.

Description

Technical Field

[0001] The invention belongs to the research field of road engineering materials, in particular to an integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection. Background Art

[0002] With the continuous development of China's infrastructure construction, green ecology and environmental protection are gradually being valued by people. In the greening construction of cities and highways, more and more urban river channels and highway slopes are beginning to be paved with vegetative concrete. In order to be able to plant plants on vegetative concrete, drilling is a very important part, and in order to evaluate the overall ecological benefits of the slope after using this concrete, its permeability coefficient is one of the main indicators.

[0003] The current technology used to drill holes in concrete is mainly to use a drill bit to drill holes in the concrete after it has been formed. However, in order to ensure a large void ratio, the strength of the vegetation concrete is much lower than that of ordinary concrete. The current drilling technology will cause significant irreversible damage to the vegetation concrete. Few researchers have paid attention to the measurement of the permeability coefficient of the slope protection. Most of them use instruments modified from reference soil sample permeameters to measure concrete. The integrity of the slope protection is not taken into account, and the permeability of the slope protection cannot be evaluated. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated device for drilling vegetation concrete and measuring the permeability coefficient of slope protection, so as to perform drilling and shaping on vegetation concrete and accurately simulate the various structural layers of the slope protection, and measure the permeability coefficient of the entire slope protection.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] An integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection, characterized in that it comprises:

[0007] Slope protection structure simulation container, used to place vegetation concrete and slope protection structure layer materials;

[0008] A water injection system is used to inject water into the simulated container of the slope protection structure;

[0009] A vacuum system is used to vacuum the simulated container of the slope protection structure;

[0010] The punching system is used to punch holes in the vegetation concrete in the slope structure simulation container;

[0011] Overflow system, used for slope protection structure to simulate the hydraulic gradient of the container;

[0012] The infiltration metering system is used to measure the infiltration water in the simulated container of the slope protection structure.

[0013] Compared with the prior art, the present invention has the following significant advantages:

[0014] The present invention provides an integrated device for drilling holes in vegetated concrete and measuring the permeability coefficient of slope protection, which achieves integration of forming and measurement, so that the forming of vegetated concrete and the measurement of the permeability coefficient can be realized in an indoor environment, which is time-saving and convenient. At the same time, it can accurately simulate the various structural layers of the slope protection, intuitively characterize the interaction between water flow and slope protection, and has a positive promoting effect on the research on the action mechanism of slope protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the upper punching system of the present invention.

[0017] Figure 3 It is a schematic diagram of the perforated chassis of the present invention.

[0018] Figure 4 It is a schematic diagram of the overflow control system of the present invention.

[0019] Figure 5 It is a schematic diagram of the slope protection structure simulation container of the present invention.

[0020] Figure 6 Schematic diagram of the water collection system of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] Combination Figure 1 The present embodiment is an integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection, comprising a support frame, an upper drilling system, a slope protection structure simulation container, a base and other components. The specific instruments are as follows: a water storage tank (1), a support frame (2), a base (3), a water supply valve (4), a water supply pipe (5), a vibrator (6), a drilling chassis (7), a drilling mold rod (8), an exhaust pipe (9), an overflow valve (10), a rubber hose (11), a lifting fixture (12), a water tank (13), a planted concrete container (14), a permeable stone (15), a flange buckle (16), a detachable unit container (17), a water collection funnel (18), a water guide pipe (19), a water collection valve (20), a measuring cylinder (21), a loading pressure rod (22), a loading motor (23), and a vacuum pump (24);

[0024] The support frame (2) and the base (3) are used to fix various parts and maintain the structural stability of the device when it is in working state. The water storage tank (1), the loading motor (23) and the vacuum pump (24) are all fixed on the support frame (2). The water storage tank (1) is used to transport water to the container. The water storage tank (1) passes through the perforated bottom plate (7) through the water supply pipe (5) to transport water to the vegetation concrete container (14). The water supply pipe (5) is provided with a water supply valve (4). The vacuum pump (24) passes through the perforated bottom plate (7) through the exhaust pipe (9) to evacuate the vegetation concrete container (14). A plurality of punching mold bars (8) are fixed below the punching chassis (7) for directly contacting the concrete. The vibrator (6) is fixed on the punching chassis (7) for vibrating the punching chassis (7). The loading pressure rod (22) is connected to the punching chassis (7) and driven by a loading motor (23) for providing a controllable load for the punching chassis (7). The punching chassis (7) is arranged in a vegetation concrete container (14) and can move up and down along the vegetation concrete container (14);

[0025] The lower end of the vegetation concrete container (14) is provided with a detachable unit container (17), and the vegetation concrete container (14) and the detachable unit container (17) are respectively used to place the vegetation concrete and other constituent materials of the slope protection structure layer. The vacuum pump (24) is used to accelerate the water saturation of the concrete and other structural layer materials that have been submerged in water. The water collecting funnel (18) is arranged at the lower end of the detachable unit container (17) and is used to collect the water that permeates from the bottom of the container. The lower end of the water collecting funnel (18) is provided with a water guide pipe (19), and the water outlet of the water guide pipe 19 flows into a measuring cylinder (21). The water guide pipe 19 is provided with a water collecting valve (20). The support frame (2) is provided with a guide rod, and the lifting clamp (12) is arranged on the guide rod, and can slide up and down along the guide rod and clamp and fix. The vegetation concrete container (14) is provided with a rubber hose (11), and the lifting clamp (12) is connected to the outlet end of the rubber hose (11) and is used to adjust the height of the water outlet of the rubber hose (11). The rubber hose (11) is provided with an overflow valve (10). A water tank 13 is fixed on the support frame (2) for receiving water overflowing from the rubber hose (11).

[0026] Combination Figure 2 The punching mold rod 8 is fixed under the punching chassis 7. The diameter of the punching mold rod 8 is 3.5 cm. The diameter of the punching chassis 7 is 30 cm. The vibrator 6 is fixed on its upper side and a load is applied to it by a loading pressure rod 22.

[0027] Combination Figure 3 , 7 centrally symmetrical punching mold rods 8 are fixed below the punching chassis 7, and a water inlet hole 25 and an air extraction hole 26 are provided on both sides of the center point, each with a diameter of 3.6 cm.

[0028] Combination Figure 4 The displacement range of the lifting fixture 12 is 0 to 25 cm, and the water is discharged through the rubber hose 11.

[0029] Combination Figure 5 The mixed concrete is placed in the vegetation concrete container 14, and other structural layer materials are placed in the detachable unit container 17. The number of detachable unit containers 17 can be freely increased or decreased according to the actual slope protection structure composition. The inner diameter of the container is 31 cm. Each structural layer is separated by a permeable stone 15 with a thickness of 2 cm. Each container unit is fixed by a flange buckle 16.

[0030] Combination Figure 6 The water that finally seeps out is collected by the water collecting funnel 18, transported to the measuring cylinder 21 through the water conduit 19, and the water inflow and outflow are controlled by the water collecting valve 20.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that:

[0033] The measuring method based on the above measuring device comprises the following steps: the loading pressure rod (22) is driven by a cylinder.

[0034] In the first step, two detachable unit containers 17 are selected, two structural layer materials, namely water-stable crushed stone and soil, are added therein, separated by permeable stone 15, and nuts are screwed on flange buckles 16, and then the mixed and easily uniform vegetation concrete is poured into the vegetation concrete container 14.

[0035] The second step is to set the loading motor 23 parameter to a loading speed of 50 mm / min, measure the concrete thickness, and set the final displacement of the loading pressure rod 22 so that the punching mold rod 8 is completely driven into the concrete to a depth of 65% to 75% of the height of the vegetation concrete.

[0036] The third step is to open the water supply valve 4. At this time, no water is added to the water storage tank 1. The loading motor 23 and the vibrator 6 are started. At this time, the loading process begins. The air in the container is discharged through the water supply pipe 5. After the loading pressure rod 22 reaches the termination condition (final displacement), the vibrator 6 continues to work for 5 minutes and then turns off.

[0037] The fourth step is to maintain the position of the loading rod 22 unchanged, and after curing the concrete for 1 day, raise the loading rod 22 to the initial position, and continue to cure the concrete for 13 days.

[0038] The fifth step is to add water to the water storage tank 1, open the water supply valve 4, add water to the container until the water surface is about 10 cm above the surface of the vegetation concrete, then close the water supply valve 4, open the vacuum pump 24 to accelerate the water saturation of the sample, and after no more bubbles are generated on the water surface, close the vacuum pump 24, open the water supply valve 4 and the overflow valve 10, and adjust the height of the lifting fixture 12 according to the required hydraulic gradient.

[0039] Step 6: The test starts when water starts to flow out of the water pipe 19. The volume of water in the measuring cylinder is read at fixed intervals. The permeability coefficient K is calculated according to the following formula:

[0040]

[0041] Where: K is the permeability coefficient of the entire slope protection, cm / s; Q is the volume of water in the measuring cylinder 21 within time t seconds, cm 3 / t; L is the total thickness of each structural layer in the container, cm; A is the water-passing cross-sectional area of ​​the sample column, cm 2 ; Δh is the relative height between the lifting fixture 12 and the water collecting valve 20, cm; t is the time, s.

Claims

1. An integrated device for drilling holes in planted concrete and measuring the permeability coefficient of slope protection, characterized in that: include: Slope protection structure simulation container, used to place vegetation concrete and slope protection structure layer materials; A water injection system is used to inject water into the simulated container of the slope protection structure; A vacuum system is used to vacuum the simulated container of the slope protection structure; The punching system is used to punch holes in the vegetation concrete in the simulated container of the slope protection structure; Overflow system, used for slope protection structure to simulate the hydraulic gradient of the container; The infiltration metering system is used to measure the infiltration water in the simulated container of the slope protection structure; The punching system comprises a vibrator (6), a punching chassis (7), a punching mold rod (8), a loading pressure rod (22), and a loading motor (23); The perforated chassis (7) is arranged in a slope protection structure simulation container, a plurality of perforated mold rods (8) are fixed below the perforated chassis (7), and the vibrator (6) is fixed on the perforated chassis (7) and is used to vibrate the perforated chassis (7); the loading pressure rod (22) is connected to the perforated chassis (7) and is driven by a loading motor (23) and is used to provide a controllable load for the perforated chassis (7); a water inlet hole and an air extraction hole are provided on the perforated chassis; The overflow system comprises an overflow valve (10), a rubber hose (11), and a lifting fixture (12); The slope protection structure simulation container is provided with a rubber hose (11), and the lifting fixture (12) is connected to the outlet end of the rubber hose (11) and is used to adjust the height of the water outlet of the rubber hose (11); The slope protection structure simulation container comprises a vegetation concrete container (14) and a detachable unit container (17); The detachable unit container (17) is arranged at the lower end of the vegetation concrete container (14); the vegetation concrete container (14) and the detachable unit container (17) are used to place the vegetation concrete and the slope protection structure layer materials respectively.

2. The device according to claim 1, characterized in that The water injection system comprises a water storage tank (1), a water supply valve (4), and a water supply pipe (5); the water storage tank (1) injects water into a simulated container of a slope protection structure via the water supply pipe (5), and the water supply valve (4) is provided on the water supply pipe (5).

3. The device according to claim 1, characterized in that The rubber hose (11) is provided with an overflow valve (10).

4. The device according to claim 1, characterized in that The vacuum extraction system comprises an exhaust pipe (9) and a vacuum pump (24); the vacuum pump (24) performs vacuum extraction processing on the simulated container of the slope protection structure through the exhaust pipe (9).

5. The device according to claim 1, characterized in that The vegetation concrete container (14) and the detachable unit container (17) are separated by a permeable stone (15) and fixed by a flange buckle (16).

6. The device according to any one of claims 1 to 5, used for determining the permeability coefficient, characterized in that: The following steps are involved: The first step is to select two detachable unit containers, add two structural layer materials, namely water-stable crushed stone and soil, separate them with permeable stones, and then pour the mixed and easy-to-even vegetation concrete into the vegetation concrete container; The second step is to make the punching mold rod fully penetrate into the concrete to a depth of 65% to 75% of the height of the vegetation concrete; The third step is to start the loading process. After the loading rod reaches the set displacement, the vibrator continues to work for the set time and then turns off. Step 4: Maintain the position of the loading rod unchanged, raise the loading rod to the initial position after curing the concrete, and continue curing the concrete; Step 5: Add water to the container until the water surface covers the surface of the vegetation concrete, then turn on the vacuum pump to accelerate the water saturation of the sample. After no more bubbles are generated on the water surface, turn off the vacuum pump, open the water supply valve and the overflow valve, and adjust the height of the lifting fixture according to the required hydraulic gradient; Step 6: The test begins when water starts to flow out of the water pipe. At fixed intervals, read the volume of water in the measuring cylinder and calculate the permeability coefficient. K : ； Where: K is the permeability coefficient of the entire slope protection; Q For time t The volume of water in the graduated cylinder in seconds; L is the total thickness of each structural layer in the container; A is the water-passing cross-sectional area of ​​the sample column; Δh It is the relative height between the lifting fixture and the water collecting valve; t For time.

Images