[0044] Such as Figure 1 to Figure 3 As shown, the automatic loading and unloading type drilling core thickness evaluation device for highway engineering pavement according to the present invention includes a pull ring, a transport vehicle 1 and a cantilever crane installed on the transport vehicle 1 for automatic loading and unloading of the core drilling machine 8 The pull ring is installed on the road surface sampling point of the highway engineering, the frame of the drilling and core machine 8 is provided with a control terminal, and the drill tube 9 of the drilling and core machine 8 is provided with a A thickness measurement evaluation mechanism for evaluating the thickness of the pavement core sample and a window for taking out the pavement core sample obtained by the drill bit 10, the window is sealed by a window plate 12, and an electric rocker 15 is installed on the top of the inner wall of the drill barrel 9, One end of the steel wire 16 is wound in the electric rocker 15, and the other end of the steel wire 16 extends into the drill barrel 9 and is provided with a hook 17 that cooperates with the pull ring. The thickness measurement evaluation mechanism includes an integral body with the drill barrel 9. Connected to the expansion tube 11 and multiple groups of thickness measurement evaluation units installed on the inner wall of the expansion tube 11, the thickness measurement evaluation unit includes an infrared emitting tube 13 and an infrared receiving tube 14 matched with the infrared emitting tube 13, multiple groups The infrared emission tube 13 and the infrared receiving tube 14 in the thickness measurement evaluation unit are coplanar, the plane where the infrared rays are located is perpendicular to the central axis of the drill tube 9, and each infrared ray passes through the center of the plane where the infrared rays are located, and the infrared emission The infrared length between the tube 13 and the infrared receiving tube 14 is greater than the diameter of the drill barrel 9, and the infrared receiving tube 14 is connected to the control terminal.
[0045] It should be noted that by setting a pull ring on the road surface sampling point of the highway engineering, the pull ring is used to locate the core sample position, and at the same time, it is convenient to extract the core sample; by installing the cantilever crane on the transport vehicle 1, the cantilever crane is used to lift the core sample. The hoisting, loading, unloading, drilling and core-taking machine 8 reduces manpower, has high safety, and improves efficiency. The pull ring provides a parking location for the transport vehicle 1. The transport vehicle 1 is parked beside the pull ring and is lifted by a cantilever crane. When loading and unloading the core drilling machine 8, when the core drilling machine 8 is on the road, move the position of the core drilling machine 8 through the wheels of the core drilling machine 8, and the pull ring is the core of the drilling core machine 8. Positioning points are provided, and the drill barrel 9 of the core drilling machine 8 is aligned with the pull ring to realize the core of the road surface sampling point of the highway engineering; by setting the expansion barrel 11 on the drill barrel 9, the drill barrel 9 is modified, Multiple groups of thickness measurement units are installed on the inner wall of the expansion tube 11. The infrared length between the infrared emitting tube 13 and the infrared receiving tube 14 in each group of thickness measurement units is greater than the diameter of the drill tube 9, to avoid the core sample being measured when the core sample is lifted. For the collision and friction of thick elements, when the core sample is selected, the shape is not necessarily a standard cylinder, and there are inevitably defects on the upper and lower surfaces. Therefore, it is necessary to obtain multiple sets of data through multiple sets of thickness measurement units, and obtain the final core sample through data averaging Thickness and high accuracy; the infrared rays between the infrared emitting tube 13 and the infrared receiving tube 14 in the multiple sets of thickness measurement units are coplanar and the plane where the infrared rays are located is perpendicular to the central axis of the drill tube 9, ensuring that the measurement data can be obtained at the same time Defects on the upper and lower surfaces of the cylinder have good results.
[0046] In this embodiment, the cantilever crane includes a column 2 installed on the transport vehicle 1 and a cantilever 4 installed on the top of the column 2. The cantilever 4 is connected to the column 2 through a revolving arm 3, and the cantilever 4 is provided with a power hoist 5 A sliding slide, the wire extension end of the electric hoist 5 is connected with a hook 6, a drilling core machine 8 is equipped with a plurality of ropes 7, and the hook 6 is loaded and unloaded through a plurality of ropes 7 a drilling core machine 8 .
[0047] It should be noted that a slideway is provided on the cantilever 4 to provide a track for the sliding of the electric hoist 5, and the cantilever 4 is connected with the column 2 through the revolving arm 3 to ensure the steering angle of the cantilever 4 is adjusted.
[0048] In this embodiment, the number of sampling points on the road surface of the highway engineering is multiple, and the number of pull rings is equal to and corresponds to the number of sampling points on the road surface of the highway engineering. The pull rings are prefabricated and installed on the road surface of the highway engineering.
[0049] In this embodiment, the electric rocker 15 is installed at the top center of the inner wall of the drill barrel 9.
[0050] It should be noted that the electric rocker 15 is installed at the top center of the inner wall of the drill barrel 9 to ensure that the steel wire 16 is centered during the up and down movement to avoid the core sample from contacting the inner wall of the drill barrel 9.
[0051] In this embodiment, the control terminal is a mobile PC.
[0052] In this embodiment, the infrared emitting tube 13 is an infrared emitting tube TSAL6200, and the infrared receiving tube 14 is an infrared receiving tube 1838T matched with an infrared emitting tube TSAL6200.
[0053] Such as Figure 4 The shown method for automatic loading and unloading of core drilling thickness measurement for road engineering pavement includes the following steps:
[0054] Step 1. Set up sampling points on the road surface of the highway project and install the pull ring: set multiple road surface sampling points along the length of the road surface of the highway project, and set the pull ring on each road surface sampling point;
[0055] Step 2: Measuring the thickness of the pavement core sample, the process is as follows:
[0056] Step 201: Move the transport vehicle 1 to the side of a road engineering pavement sampling point, so that the transport vehicle 1 does not block the road engineering pavement sampling point;
[0057] Step 202. Start the cantilever crane, use the hook 6 to connect multiple slings 7, the electric hoist 5 lifts the drilling and core machine 8, hoist the drilling and core machine 8 to the road, and remove the multiple slings 7 and hooks 6 connection;
[0058] Step 203. Move the drilling core machine 8 to the road surface sampling point of the highway project, so that the drill barrel 9 is aligned with the pull ring, which is located at the center of the projection of the drill barrel 9, and the pull ring is connected through the hook 17 to start drilling and core removal The machine 8 performs core-drilling sampling on the road surface at the location of the road surface sampling point of the highway engineering to obtain a pavement core sample, and the pull ring is located at the center of the top surface of the pavement core sample;
[0059] Step 204: The electric rocker 15 uses the steel wire 16 and the hook 17 to raise the road core sample at a uniform speed, according to the formula Calculate the thickness of the pavement core sample The unit is cm, where I is the group number of the thickness measurement evaluation unit, i is the group number of the thickness measurement evaluation unit and i=1, 2,...,I, v is the number of the electric rocker 15 Lifting speed, the unit is cm/s, T i0 Is the blocking time of the infrared emitting tube 13 and the infrared receiving tube 14 in the thickness measurement evaluation unit of the i-th group, T iz Is the turn-on recovery time of the infrared transmitting tube 13 and the infrared receiving tube 14 in the thickness measurement evaluation unit of the i-th group, T iz -T i0 The unit is s;
[0060] When the pavement core sample is raised to the height of the window, remove the pavement core sample from the window of the drill tube 9 for storage;
[0061] In this embodiment, in step 204, when the pavement core sample is raised to the height of the window, the pavement core sample is taken out of the window of the drill tube 9 for storage, and then the window plate 12 is installed on the outside of the window by a connector to seal Window, the connector is a socket installed on the drill barrel 9 and a plug installed on the window plate 12 and matched with the socket.
[0062] Step 205, start the cantilever crane again, use the hook 6 to connect multiple slings 7, the electric hoist 5 lifts the drilling and core machine 8, and hoist the drilling and core machine 8 to the transport vehicle 1;
[0063] Step 3. Repeat step 2 many times until all road surfaces at the road surface sampling points of highway engineering have completed core drilling sampling and thickness measurement;
[0064] Step 4: According to the formula Calculate the average thickness of all pavement core samples The unit is cm, where J is the total number of pavement core samples, j is the number of pavement core samples and j=1, 2,...,J, Is the thickness of the j-th pavement core sample, in cm;
[0065] Step 5. According to the formula Calculate the representative value h of the thickness of the pavement core sample, in cm, where α is the design guarantee rate, Is the one-sided confidence level of the pavement core sample thickness obtained from the t distribution probability coefficient table, S is the standard deviation and
[0066] Step 6. According to the formula h≥βh d , To judge whether the representative value of the thickness of the pavement core sample meets the design requirements, when h≥βh d When the thickness representative value of the pavement core sample meets the design requirements, go to step 7; when h d When the representative value of the thickness of the pavement core sample does not meet the design requirements, the core-drilling thickness measurement evaluation fails, where h d Is the design thickness, the unit is cm, β is the highway grade coefficient;
[0067] Step 7. According to the formula Judge whether the thickness of the j-th pavement core sample is qualified, when When the thickness of the j-th pavement core sample is qualified, it means that the road section is qualified; When the thickness of the j-th pavement core sample is unqualified, it means that the assessment of the road section is unqualified, where Δh is the thickness deviation and Δh> 0, the unit is cm;
[0068] Count the number of qualified pavement core samples, according to the formula Calculate the qualified rate γ of the road surface of highway engineering, where k is the number of qualified pavement core sample thicknesses.
[0069] When the present invention is in use, the steps are simple. The pull ring is used to limit the moving position of the transport vehicle 1, the drilling core machine 8 is lifted by a cantilever crane, the drilling core machine 8 is moved to drill the core sample, and the hook 17 is used to cooperate with the pull ring to lift Core sample, the core sample thickness is automatically calculated by the process of improving the core sample, and the accuracy is high. The core drilling process on the sampling points of each highway engineering pavement is the same. As the transport vehicle moves along the length of the highway engineering pavement, multiple highway engineering pavements are realized Automatic loading and unloading type core-drilling thickness measurement evaluation of sampling points; use the average value of multiple measurements to calculate the representative value of the thickness of the pavement core sample. When the representative value of the thickness of the pavement core sample meets the design requirements, calculate and calculate the pass rate of highway engineering; When the representative value of the thickness of the pavement core sample does not meet the design requirements, it is directly judged that the core thickness measurement evaluation is unqualified, with less manpower, time saving and high efficiency.
[0070] The above are only the preferred embodiments of the present invention and do not limit the present invention. Any simple modification, alteration and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. Within the protection scope of the program.
