Method for rapid determination of grouting sufficiency of semi-flexible pavement

Abstract

The application discloses a kind of semi-flexible pavement grouting sufficiency rapid determination method, the method is: to semi-flexible pavement target position is carried out opening to preset depth using drill rig;Buried grouting detection probe tube, fill cement and lime mixture to probe tube inside;Along probe tube top water tank injects clear water;Interval preset length is read in set time probe tube top temperature and is recorded, and temperature and time curve are drawn;Difference value of peak temperature and initial temperature is calculated, whether semi-flexible pavement grouting is sufficient is determined;Open probe tube bottom valve, remove detection probe, add appropriate amount of cement and lime mixture to fill borehole and add appropriate amount of water.Based on this, by semi-flexible pavement opening, using grouting detection probe tube to borehole grouting sufficiency detection, semi-flexible pavement grouting sufficiency can be rapidly determined, and after determination is completed, also using grouting detection probe tube to borehole backfill, to semi-flexible pavement fast repair.

Description

Technical Field

[0001] This invention relates to the field of asphalt pavement quality testing technology, and in particular to a rapid method for determining the adequacy of grouting in semi-flexible pavements. Background Technology

[0002] Semi-flexible pavement combines the advantages of both cement concrete and asphalt concrete pavements. By injecting cement grout into an open-graded, large-void matrix asphalt mixture, semi-flexible pavement possesses the flexibility and seamlessness of asphalt concrete while combining the high load-bearing capacity and fatigue resistance of cement concrete. It exhibits excellent road performance, ensuring the integrity of the pavement structure and preventing cracking, while also improving the high-temperature stability of the overall pavement structure and preventing rutting. Semi-flexible pavement is an excellent new type of pavement structure material, particularly suitable for heavy-load roads, intersections, bus stops, toll stations, and other typical road areas prone to rutting.

[0003] The effectiveness of grouting is a crucial factor determining the compressive and flexural strength of semi-flexible pavements, and determining the adequacy of grouting is a critical step in pavement construction. However, existing methods for testing the grouting of semi-flexible pavements involve on-site core sampling, which not only damages the pavement but is also cumbersome and fails to meet the need for rapid assessment. Summary of the Invention

[0004] This invention provides a rapid method for determining the adequacy of grouting in semi-flexible pavements. By drilling holes in the semi-flexible pavement and using a grouting detection probe to test the adequacy of grouting in the boreholes, the adequacy of grouting in semi-flexible pavements can be rapidly determined. After the determination is completed, the boreholes are backfilled using the same grouting detection probe, thereby quickly repairing the semi-flexible pavement and avoiding damage to the pavement. The entire implementation process is simple and quick, and can meet the needs of rapid determination of grouting adequacy in semi-flexible pavements.

[0005] In a first aspect, embodiments of the present invention provide a method for rapidly determining the adequacy of grouting in semi-flexible pavements, comprising the following steps:

[0006] Step S1: Use a drilling rig to drill holes to a preset depth at the target location of the semi-flexible pavement to form a borehole;

[0007] Step S2: The grouting detection probe tube is embedded in the borehole and filled with cement / lime mixture. The grouting detection probe tube includes a water injection tank, a temperature display, a probe tube, an opening, a temperature sensor, a tie rod, an inner enclosure of the water injection tank, an outer enclosure of the water injection tank, and an inner opening cap.

[0008] Step S3: After the grouting test probe tube is filled with a sufficient amount of cement / lime mixture, inject clean water along the water injection groove outside the grouting test probe tube;

[0009] Step S4: After the water injection is completed, the temperature is recorded through the temperature display at the top of the grouting detection probe tube. The temperature value is read at preset intervals within a set time period, and a temperature-time curve is plotted.

[0010] Step S5: Read the peak temperature and initial temperature according to the temperature and time curve, and calculate the difference between the peak temperature and the initial temperature to determine whether the semi-flexible pavement grouting is sufficient;

[0011] Step S6: Open the inner opening cap at the bottom of the grouting detection probe tube, slowly lift the grouting detection probe tube and take it out, add cement / lime mixture into the borehole to the top, and then add clean water to complete the filling work.

[0012] In one embodiment, in step S1, the preset depth is 10mm above the design grouting depth of the semi-flexible pavement, with a range of 40 to 100mm.

[0013] In one embodiment, the top of the grouting detection probe tube is provided with the water injection groove, and the two sides of the water injection groove are provided with the inner enclosure of the water injection groove and the outer enclosure of the water injection groove. The water injection groove is connected to the probe tube, the probe tube is provided with multiple openings, the temperature sensor is disposed inside the probe tube, the temperature sensor is electrically connected to the temperature display, the temperature display is disposed at the top of the grouting detection probe tube, and the bottom of the probe tube is provided with an inwardly opening cap.

[0014] In one embodiment, the probe is a 15mm diameter hollow metal rod, and the probe adopts a variable telescopic rod design.

[0015] In one embodiment, the inner-opening cap is used to open and close the bottom of the probe via a pull rod.

[0016] In one embodiment, the inner-opening cap is sealed with a closed rubber gasket.

[0017] In one embodiment, the temperature display has a temperature range of 0 to 100°C, the inner enclosure of the water injection tank is a metal outer ring with a diameter of 100 mm, and the outer enclosure of the water injection tank is a metal outer ring with a diameter of 150 mm.

[0018] In one embodiment, in step S3, the mass ratio of cement to lime in the cement / lime mixture is 2:1, and the type of cement is the same as that used in the semi-flexible pavement grouting material.

[0019] In one embodiment, in step S5, determining whether the semi-flexible pavement grouting is sufficient includes: if the temperature difference at a detection depth of 40-60mm is greater than or equal to 5℃, it is considered insufficient; otherwise, it is considered sufficient. If the temperature difference at a detection depth of 60-80mm is greater than or equal to 8℃, it is considered insufficient; otherwise, it is considered sufficient. If the temperature difference at a detection depth of 80-100mm is greater than or equal to 12℃, it is considered insufficient; otherwise, it is considered sufficient.

[0020] In one embodiment, in step S6, the mass ratio of cement to lime in the cement / lime mixture is 1:2, and the amount of water added is selected within the water-cement ratio range of 0.4 to 0.6.

[0021] This invention includes a method for rapidly determining the adequacy of grouting in semi-flexible pavement, comprising the following steps: Step S1: Drilling a hole to a preset depth at the target location of the semi-flexible pavement using a drilling rig to form a borehole; Step S2: Embedding a grouting detection probe tube in the borehole and filling the grouting detection probe tube with a cement / lime mixture, wherein the grouting detection probe tube includes a water injection tank, a temperature display, a probe tube, an opening, a temperature sensor, a bottom tie rod, an inner enclosure of the water injection tank, an outer enclosure of the water injection tank, and an inner opening cap; Step S3: After the grouting detection probe tube is filled with a sufficient amount of cement / lime mixture, along the grouting detection probe... Step S4: After the water injection tank outside the pipe is filled with clean water, the temperature is recorded through the temperature display at the top of the grouting detection probe tube. The temperature value is read at preset intervals within a set time, and a temperature-time curve is plotted. Step S5: The peak temperature and the initial temperature are read according to the temperature-time curve, and the difference between the peak temperature and the initial temperature is calculated to determine whether the grouting of the semi-flexible pavement is sufficient. Step S6: The inner opening cap at the bottom of the grouting detection probe tube is opened, the grouting detection probe tube is slowly lifted and taken out, and cement / lime mixture is added to the borehole up to the top. Then, clean water is added to complete the filling work. Based on this, the embodiment of the present invention, by drilling holes in the semi-flexible pavement and using a grouting detection probe tube to detect the sufficiency of grouting in the borehole, can achieve a rapid determination of the sufficiency of grouting in the semi-flexible pavement. After the determination is completed, the borehole is backfilled using the grouting detection probe tube, thereby quickly repairing the semi-flexible pavement and avoiding damage to the pavement. The entire implementation process is simple and quick, and can meet the need for rapid determination of the sufficiency of grouting in semi-flexible pavement.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0024] Figure 1 A flowchart illustrating a rapid method for determining the adequacy of grouting in a semi-flexible pavement according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a grouting detection probe tube provided in one embodiment of the present invention;

[0026] The attached diagrams are labeled as follows: 1. Water tank; 2. Temperature display; 3. Probe; 4. Opening; 5. Temperature sensor; 6. Tie rod; 7. Inner enclosure of the water tank; 8. Outer enclosure of the water tank. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] It should be understood that in the description of the embodiments of the present invention, "multiple" (or "amounts") means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] Semi-flexible pavement combines the advantages of both cement concrete and asphalt concrete pavements. By injecting cement grout into an open-graded, large-void matrix asphalt mixture, semi-flexible pavement possesses the flexibility and seamlessness of asphalt concrete while combining the high load-bearing capacity and fatigue resistance of cement concrete. It exhibits excellent road performance, ensuring the integrity of the pavement structure and preventing cracking, while also improving the high-temperature stability of the overall pavement structure and preventing rutting. Semi-flexible pavement is an excellent new type of pavement structure material, particularly suitable for heavy-load roads, intersections, bus stops, toll stations, and other typical road areas prone to rutting.

[0030] The effectiveness of grouting is a crucial factor determining the compressive and flexural strength of semi-flexible pavements, and determining the adequacy of grouting is a critical step in pavement construction. However, existing methods for testing the grouting of semi-flexible pavements involve on-site core sampling, which not only damages the pavement but is also cumbersome and fails to meet the need for rapid assessment.

[0031] To address the aforementioned problems in the existing technology, this invention provides a rapid method for determining the adequacy of grouting in semi-flexible pavements, comprising the following steps: Step S1: Drilling a hole to a preset depth at the target location of the semi-flexible pavement using a drilling rig to form a borehole; Step S2: Embedding a grouting detection probe tube in the borehole and filling the probe tube with a cement / lime mixture, wherein the grouting detection probe tube includes a water injection tank, a temperature display, a probe tube, an opening, a temperature sensor, a bottom tie rod, an inner enclosure of the water injection tank, an outer enclosure of the water injection tank, and an inner opening cap; Step S3: After the grouting detection probe tube is filled with a sufficient amount of cement / lime mixture... Then, clean water is injected into the water inlet outside the grouting detection probe tube; Step S4: After the clean water is injected, the temperature is recorded through the temperature display at the top of the grouting detection probe tube. The temperature value is read at preset intervals within a set time, and a temperature-time curve is plotted; Step S5: The peak temperature and the initial temperature are read according to the temperature-time curve, and the difference between the peak temperature and the initial temperature is calculated to determine whether the grouting of the semi-flexible pavement is sufficient; Step S6: The inner opening cap at the bottom of the grouting detection probe tube is opened, the grouting detection probe tube is slowly lifted and taken out, and cement / lime mixture is added to the borehole up to the top, and then clean water is added to complete the filling work. Based on this, the embodiment of the present invention, by drilling holes in the semi-flexible pavement and using a grouting detection probe tube to detect the sufficiency of grouting in the borehole, can achieve a rapid determination of the sufficiency of grouting in the semi-flexible pavement. After the determination is completed, the borehole is backfilled using the grouting detection probe tube, thereby quickly repairing the semi-flexible pavement and avoiding damage to the pavement. The entire implementation process is simple and quick, and can meet the need for rapid determination of the sufficiency of grouting in semi-flexible pavement.

[0032] like Figure 1 As shown, Figure 1 This is a flowchart illustrating a rapid method for determining the adequacy of grouting in a semi-flexible pavement according to an embodiment of the present invention. The rapid method for determining the adequacy of grouting in a semi-flexible pavement may include, but is not limited to, the following steps:

[0033] Step S1: Use a drilling rig to drill holes to a preset depth at the target location of the semi-flexible pavement to form a borehole;

[0034] Step S2: Embed the grouting test probe tube into the borehole and fill the grouting test probe tube with cement / lime mixture;

[0035] Step S3: After the grouting test probe tube is filled with a sufficient amount of cement / lime mixture, inject clean water along the water injection groove outside the grouting test probe tube;

[0036] Step S4: After the water injection is completed, the temperature is recorded by the temperature display at the top of the grouting detection probe tube. The temperature value is read at preset intervals within a set time period, and a temperature-time curve is plotted.

[0037] Step S5: Read the peak temperature and initial temperature based on the temperature-time curve, and calculate the difference between the peak temperature and the initial temperature to determine whether the grouting of the semi-flexible pavement is sufficient.

[0038] Step S6: Open the inner opening cap at the bottom of the grouting test probe tube, slowly lift the grouting test probe tube and take it out, add cement / lime mixture into the borehole up to the top, and then add clean water to complete the filling work.

[0039] It should be noted that, as Figure 2 As shown, the grouting detection probe tube includes a water injection tank 1, a temperature display 2, a probe tube 3, an opening 4, a temperature sensor 5, a pull rod 6, an inner enclosure of the water injection tank 7, an outer enclosure of the water injection tank 8, and an inner opening cap. The entire grouting detection probe tube has a simple structure and is easy to operate.

[0040] This invention, through drilling holes in semi-flexible pavement and using a grouting detection probe tube to test the sufficiency of grouting in the boreholes, enables rapid determination of the sufficiency of grouting in semi-flexible pavement. After the determination is completed, the boreholes are backfilled using the same grouting detection probe tube, thereby quickly repairing the semi-flexible pavement and avoiding damage to the pavement. The entire implementation process is simple and quick, and can meet the need for rapid determination of the sufficiency of grouting in semi-flexible pavement.

[0041] In one embodiment, in step S1, the selection of the target location is based on actual work requirements. If no specific requirements are specified, location detection can be performed at 20m intervals along the direction of travel of the lane. The number of lateral detections should be consistent with the number of lanes and uniformly distributed. The preset depth is 10mm above the designed grouting depth of the semi-flexible pavement, with a measurement range of 40 to 100mm.

[0042] In one embodiment, in step S3, 500 ml of clean water can be injected into the water injection tank outside the grouting detection probe tube.

[0043] In one embodiment, in step S4, temperature values ​​can be read at 1-minute intervals within 10 minutes, and a temperature-time curve can be plotted.

[0044] In one embodiment, a water injection tank 1 is provided at the top of the grouting detection probe tube. Inner baffles 7 and outer baffles 8 are provided on both sides of the water injection tank 1. The water injection tank 1 is connected to the probe tube 3. The probe tube 3 has multiple openings 4. A temperature sensor 5 is installed inside the probe tube 3 and is electrically connected to a temperature display 2. The temperature display 2 is located at the top of the grouting detection probe tube. An inwardly opening cap is provided at the bottom of the probe tube 3. The entire grouting detection probe tube has a simple structure and is easy to operate.

[0045] In one embodiment, the probe 3 is a 15mm diameter hollow metal rod, which is sturdy and durable; the probe 3 adopts a variable telescopic rod design, which is convenient to adjust and use according to actual working requirements.

[0046] In one embodiment, the inner-opening cap is opened and closed at the bottom of the probe 3 by means of a pull rod 6, which is easy to operate.

[0047] In one embodiment, the inner-opening cap is sealed with a closed rubber gasket, which provides a good seal when closed.

[0048] In one embodiment, the temperature display 2 has a temperature range of 0 to 100°C, the inner enclosure 7 of the water filling tank is a metal outer ring with a diameter of 100 mm, and the outer enclosure 8 of the water filling tank is a metal outer ring with a diameter of 150 mm, which is sturdy, durable and not easily deformed.

[0049] In one embodiment, in step S3, the mass ratio of cement to lime in the cement / lime mixture is 2:1, and the type of cement is the same as that used in the semi-flexible pavement grouting material.

[0050] In one embodiment, in step S5, determining whether the semi-flexible pavement grouting is sufficient includes: if the temperature difference at a detection depth of 40-60mm is greater than or equal to 5℃, it is considered insufficient; otherwise, it is considered sufficient. If the temperature difference at a detection depth of 60-80mm is greater than or equal to 8℃, it is considered insufficient; otherwise, it is considered sufficient. If the temperature difference at a detection depth of 80-100mm is greater than or equal to 12℃, it is considered insufficient; otherwise, it is considered sufficient.

[0051] In one embodiment, in step S6, the mass ratio of cement to lime in the cement / lime mixture is 1:2, and the amount of water added is selected within the water-cement ratio range of 0.4 to 0.6.

[0052] Based on this, the embodiments of the present invention, by drilling holes in the semi-flexible pavement and using a grouting detection probe tube to detect the sufficiency of grouting in the boreholes, can quickly determine the sufficiency of grouting in the semi-flexible pavement. After the determination is completed, the boreholes are backfilled using the grouting detection probe tube, thereby quickly repairing the semi-flexible pavement and avoiding damage to the pavement. The entire implementation process is simple and quick, and can meet the need for rapid determination of the sufficiency of grouting in semi-flexible pavements.

[0053] The above provides a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A rapid method for determining the adequacy of grouting in semi-flexible pavements, characterized in that, Includes the following steps: Step S1: Use a drilling rig to drill holes to a preset depth at the target location of the semi-flexible pavement to form a borehole; Step S2: The grouting detection probe tube is embedded in the borehole, and a cement / lime mixture is filled into the grouting detection probe tube. The grouting detection probe tube includes a water injection tank, a temperature display, a probe tube, an opening, a temperature sensor, a tie rod, an inner enclosure of the water injection tank, an outer enclosure of the water injection tank, and an inner-opening cap. The water injection tank is provided at the top of the grouting detection probe tube, and the inner enclosure and outer enclosure of the water injection tank are provided on both sides of the water injection tank. The water injection tank is connected to the probe tube, and the probe tube has multiple openings. The temperature sensor is located inside the probe tube and is electrically connected to the temperature display. The temperature display is located at the top of the grouting detection probe tube, and the bottom of the probe tube has an inner-opening cap. Step S3: After the grouting test probe tube is filled with a sufficient amount of cement / lime mixture, inject clean water along the water injection groove outside the grouting test probe tube; Step S4: After the water injection is completed, the temperature is recorded through the temperature display at the top of the grouting detection probe tube. The temperature value is read at preset intervals within a set time period, and a temperature-time curve is plotted. Step S5: Read the peak temperature and initial temperature according to the temperature and time curve, and calculate the difference between the peak temperature and the initial temperature to determine whether the semi-flexible pavement grouting is sufficient; Step S6: Open the inner opening cap at the bottom of the grouting detection probe tube, slowly lift the grouting detection probe tube and take it out, add cement / lime mixture into the borehole to the top, and then add clean water to complete the filling work.

2. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, In step S1, the preset depth is 10mm above the design grouting depth of the semi-flexible pavement, and the range is 40 to 100mm.

3. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, The probe is a 15mm diameter hollow metal rod, and the probe adopts a variable telescopic pull rod design.

4. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, The inner-opening cap is opened and closed at the bottom of the probe via a pull rod.

5. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, The inner-opening cap is sealed with a closed rubber gasket.

6. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, The temperature display has a temperature range of 0 to 100°C, the inner enclosure of the water injection tank is a metal outer ring with a diameter of 100 mm, and the outer enclosure of the water injection tank is a metal outer ring with a diameter of 150 mm.

7. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, In step S3, the mass ratio of cement to lime in the cement / lime mixture is 2:1, and the type of cement is the same as that used in the semi-flexible pavement grouting material.

8. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, In step S5, determining whether the semi-flexible pavement grouting is sufficient includes: if the temperature difference at a detection depth of 40-60mm is greater than or equal to 5℃, it is considered insufficient; otherwise, it is considered sufficient. If the temperature difference at a detection depth of 60-80mm is greater than or equal to 8℃, it is considered insufficient; otherwise, it is considered sufficient. If the temperature difference at a detection depth of 80-100mm is greater than or equal to 12℃, it is considered insufficient; otherwise, it is considered sufficient.

9. The rapid determination method for the adequacy of grouting in semi-flexible pavement according to claim 1, characterized in that, In step S6, the mass ratio of cement to lime in the cement / lime mixture is 1:2, and the amount of water added is selected within the water-cement ratio range of 0.4 to 0.6.

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