Digital assembly type reusable lifting monitoring device and method

Abstract

The invention belongs to the technical field of concrete gravity dam consolidation grouting lifting monitoring, and particularly relates to a digital assembly type reusable lifting monitoring device and method. The lifting monitoring device is organically composed of a fixed end instrument support, a monitoring device body, a movable end instrument support, a concrete anchor pipe, a bedrock anchor pipe, a thick connecting pipe and a thin connecting pipe. The method comprises the following steps: positioning and drilling, mounting a concrete anchor pipe and a bedrock anchor pipe, grouting, mounting an orifice monitoring device, reading an initial lifting value, carrying out first-stage consolidation grouting lifting monitoring, dismounting the monitoring device, lengthening the concrete anchor pipe and the bedrock anchor pipe, and repeating the mounting of the orifice monitoring device and subsequent processes. And all consolidation grouting lifting monitoring of the whole unit project is completed. The consolidation grouting lifting monitoring device can be repeatedly used, digital monitoring is achieved, the construction period is effectively shortened, and investment of materials such as steel pipes is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of monitoring the lifting of consolidation grouting of concrete gravity dams, and particularly relates to a digital assembly type reusable lifting monitoring device and method. BACKGROUND

[0002] Buried stone concrete gravity dams need to be subjected to full-area consolidation grouting of dam foundation to improve the physical and mechanical properties of rock with developed joint fissures or broken zones. The traditional full-area consolidation grouting of dam foundation has a cover consolidation grouting method, which has the characteristics of preventing the leakage of grout and preventing the opening of original fissures, and can avoid the pollution of waste grout to the foundation surface, reduce the repeated treatment of the foundation surface and the difficulty of acceptance under the premise of ensuring the grouting quality. Cover consolidation grouting is high-pressure grouting, and it is difficult to take remedial measures after the lifting of the concrete cover, so the lifting monitoring during the grouting process is an important work in the entire grouting process.

[0003] The traditional consolidation grouting lifting monitoring uses a dial gauge as the monitoring equipment, which needs manual reading, has low digitalization, and needs to drill holes and install anchor sleeves for use as the concrete pouring height increases, which has great limitations for cover consolidation grouting that needs to be grouted in stages according to the concrete pouring height. This construction technology of consolidation grouting needs to drill holes and install monitoring equipment multiple times for lifting monitoring, which delays the construction period and most of the materials cannot be recycled, resulting in large investment. The digital assembly type reusable lifting monitoring device can be digitally monitored, can shorten the construction period, and can reduce the investment in steel pipes and other materials. SUMMARY

[0004] The application provides a digital assembly type reusable lifting monitoring device and method, which aims to provide a lifting monitoring device and method that can be reused, digitally monitored, can shorten the construction period, and can reduce the investment in steel pipes and other materials, so as to solve the problem that the lifting monitoring device of cover consolidation grouting of slope dam foundation that is grouted in stages according to the concrete pouring height cannot be reused in the prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is: The utility model provides a kind of digital assembly formula reusable lifting monitoring device for the covered heavy consolidation grouting lifting monitoring of concrete section on slope dam foundation rock, including fixed end instrument support, monitoring device, mobile end instrument support, concrete anchor pipe, foundation rock anchor pipe, thick connector pipe and thin connector pipe;The foundation rock anchor pipe is placed in concrete anchor pipe;The mobile end instrument support is connected on the outer side wall of concrete anchor pipe;The fixed end instrument support is connected on the outer side wall of foundation rock anchor pipe;The thick connector pipe is detachably connected at the top of concrete anchor pipe;The thin connector pipe is detachably connected at the top of foundation rock anchor pipe;The monitoring device is connected between fixed end instrument support and mobile end instrument support.

[0006] The monitoring device includes displacement sensor and sleeve;The displacement sensor is placed in the sleeve;The sleeve is connected on the mobile end instrument support;The top of displacement sensor is connected on the fixed end instrument support.

[0007] The connecting end of thick connector pipe and thin connector pipe is respectively provided with thread for up and down connection;The top side wall of concrete anchor pipe and foundation rock anchor pipe is provided with thread for connecting with thick connector pipe and thin connector pipe.

[0008] A slope dam foundation covered heavy consolidation grouting lifting monitoring method uses digital assembly formula reusable lifting monitoring device, including the following steps: Step one, positioning drilling hole; Step two, installing concrete anchor pipe and foundation rock anchor pipe; Waterproof device is added in the gap between concrete anchor pipe and foundation rock anchor pipe; Step three, pipe lowering for grouting; Step four, installing monitoring device; After the final setting of grouting slurry, the installation of monitoring device is carried out; Step five, reading the lifting initial value measured by monitoring device; Step six, reading concrete lifting measurement value in the first stage consolidation grouting process; Step seven, first stage consolidation grouting is completed, and the hole monitoring device and matched fixed end instrument support and mobile end instrument support are removed; Step eight, lengthening concrete anchor pipe and foundation rock anchor pipe; Lengthen concrete anchor pipe and foundation rock anchor pipe according to concrete pouring thickness; Step nine, installing hole monitoring device again and reading lifting initial value; Step ten, second stage consolidation grouting lifting monitoring; Each time a stage of consolidation grouting is added, steps seven to ten are repeated until all consolidation grouting projects of entire unit project are completed, and the lifting value of each stage of consolidation grouting is measured; Remove the removable part of the concrete anchor pipe and the bedrock anchor pipe, fill the remaining hole with thick slurry, and lift the monitoring unit to end the monitoring.

[0009] The specific method of locating the drilling hole is to drill a hole using a geological drilling machine according to the installation position of the lifting monitoring set, take a core, and determine the depth of the bedrock according to the core sample.

[0010] The depth of the drilling hole into the bedrock is 1.5m-2.0m.

[0011] The method of assembling the sleeve pipe in step two is to determine the length of the bedrock anchor pipe and the concrete anchor pipe according to the drilling depth in step one; the length of the bedrock anchor pipe is 48-52cm longer than the hole depth, and the length of the concrete anchor pipe is 48-52cm longer than the hole depth of the concrete section 8; the bedrock anchor pipe is inserted into the concrete anchor pipe; the bedrock anchor pipe exposed at the upper end of the concrete anchor pipe is 9-11cm out of the concrete anchor pipe, and the gap between the end of the concrete anchor pipe and the bedrock anchor pipe is wrapped and sealed with waterproof geotextile; the bedrock anchor pipe exposed at the lower end of the concrete anchor pipe is more than 1.5m out of the concrete anchor pipe, and the gap between the inner wall of the lower part of the concrete anchor pipe and the outer wall of the bedrock anchor pipe is filled with a rubber piston sleeve or waterproof cement, and the gap between the end of the concrete anchor pipe and the bedrock anchor pipe is wrapped and sealed with waterproof geotextile.

[0012] The method of step three is to insert the lower end of the bedrock anchor pipe into the drilling hole, and make the part of the bedrock anchor pipe exposed outside the concrete anchor pipe all inserted into the drilling hole of the rock foundation section, and the distance from the drilling hole bottom is 8-12cm; the pipe section of the concrete anchor pipe that is not wrapped with waterproof geotextile is strictly prohibited from entering the drilling hole of the rock foundation section; the upper end of the concrete anchor pipe is 8-12cm out of the drilling hole, the upper end of the bedrock anchor pipe is 8-12cm out of the drilling hole, and the position of the concrete anchor pipe and the bedrock anchor pipe is fixed; install the grouting pipe on the bedrock anchor pipe, and pour the thick slurry with a mass ratio of cement to water of 0.5:1 into the bedrock anchor pipe until the thick slurry comes out of the drilling hole to end the grouting.

[0013] The method of step four is to fix the mobile end instrument support on the outer wall of the upper part of the concrete anchor pipe, fix the fixed end instrument support on the outer wall of the bedrock anchor pipe, and make the fixed end instrument support and the mobile end instrument support located on the same vertical plane, the height difference between the fixed end instrument support and the mobile end instrument support is 28-32cm; connect the upper and lower ends of the monitoring device with the fixed end instrument support and the mobile end instrument support respectively.

[0014] The method of step seven is to connect the thick adapter pipe to the top end of the concrete anchor pipe and the thin adapter pipe to the top end of the bedrock anchor pipe by threading.

[0015] Beneficial effects: 1. The present application solves the problem of multiple punching and repeated installation of casing in a unit project with multiple stages of lifting monitoring.

[0016] 2. The present application shortens the installation period of the lifting monitoring device.

[0017] 3. The present application saves the input of casing and other materials, and reduces construction costs.

[0018] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, and to implement the content of the specification, the following will describe the preferred embodiments of the present application in detail with the help of the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments or prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structure diagram of the lifting monitoring device of the present application.

[0021] Figure 2 The flowchart of the lifting monitoring of the present application.

[0022] In the figure: 1, fixed end instrument support; 2, displacement sensor; 3, mobile end instrument support; 4, cement slurry; 5, cement; 6, bedrock; 7, waterproof geotextile; 8, concrete section; 9, concrete anchor pipe; 10, bedrock anchor pipe; 11, sleeve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with the help of the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Embodiment: According to Figure 1The utility model provides a kind of digital assembly type reusable lifting monitoring device for slope dam foundation rock 6 on pouring concrete section 8 cover weight consolidation grouting lifting monitoring, including fixed end instrument support 1, monitoring device, mobile end instrument support 3, concrete anchor pipe 9, foundation rock anchor pipe 10, thick connector pipe and thin connector pipe;The foundation rock anchor pipe 10 is placed in concrete anchor pipe 9;The mobile end instrument support 3 is connected on the outer side wall of concrete anchor pipe 9;The fixed end instrument support 1 is connected on the outer side wall of foundation rock anchor pipe 10;The thick connector pipe is detachably connected at the top of concrete anchor pipe 9;The thin connector pipe is detachably connected at the top of foundation rock anchor pipe 10;The monitoring device is connected between fixed end instrument support 1 and mobile end instrument support 3.

[0025] Further, the monitoring device includes displacement sensor 2 and sleeve 13;The displacement sensor 2 is placed in sleeve 13;The sleeve 13 is connected on mobile end instrument support 3;The top of displacement sensor 2 is connected on fixed end instrument support 1.

[0026] Further, the connecting end of thick connector pipe and thin connector pipe is respectively provided with thread for up and down connection;The top side wall of concrete anchor pipe 9 and foundation rock anchor pipe 10 is provided with thread for connecting with thick connector pipe and thin connector pipe.

[0027] In actual use, digital assembly type reusable lifting monitoring device is used for monitoring, including the following steps: Step one, positioning drilling; Step two, install concrete anchor pipe 9 and foundation rock anchor pipe 10; Waterproof device is installed in the gap between concrete anchor pipe 9 and foundation rock anchor pipe 10; Step three, pipe down for grouting; Step four, install monitoring device; After the grouting slurry is finally cured, install monitoring device; Step five, read the lifting initial value measured by monitoring device; Step six, read the concrete lifting measurement value in the first stage consolidation grouting process; Step seven, first stage consolidation grouting is finished, remove orifice monitoring device and matched fixed end instrument support 1 and mobile end instrument support 3; Step eight, lengthen concrete anchor pipe 9 and foundation rock anchor pipe 10; Lengthen concrete anchor pipe 9 and foundation rock anchor pipe 10 according to concrete pouring thickness; Step nine, install orifice monitoring device again and read lifting initial value; Step ten, second stage consolidation grouting lifting monitoring; Each increase a stage consolidation grouting, repeat step seven to step ten, until the completion of the entire unit project all consolidation grouting engineering, and each section consolidation grouting lift value measurement; Remove the removable rough pipe and fine pipe, fill the remaining hole with thick slurry, and the whole unit project lift monitoring is completed.

[0028] The drilling in this embodiment is performed after the first pouring is completed. The specific method for positioning the drilling is to use a geological drilling machine to drill and take cores according to the installation position of the set lift monitoring, and to determine the depth of entering the bedrock 6 according to the core sample. The pre-setting of the drilling is determined according to the specification requirements and combined with the actual site. The depth of the drilling into the bedrock 6 is not less than 1.5 m, and the optimal depth range is 1.5 m to 2.0 m.

[0029] The diameter of the concrete anchor pipe 9 in this embodiment is 23-27 cm, and the diameter of the bedrock anchor pipe 10 is 48-52 cm.

[0030] The method of assembling the sleeve in step two is as follows: the lengths of the bedrock anchor pipe 10 and the concrete anchor pipe 9 are determined according to the drilling depth in step one; the length of the bedrock anchor pipe 10 is 48-52 cm longer than the drilling depth, and 50 cm is the best; the length of the concrete anchor pipe 9 is 48-52 cm longer than the hole depth of the concrete section 8, and 50 cm is the best; the bedrock anchor pipe 10 is inserted into the concrete anchor pipe 9; the bedrock anchor pipe 10 at the upper end of the concrete anchor pipe 9 is exposed from the concrete anchor pipe 9 by 11 cm, and the gap between the concrete anchor pipe 9 and the bedrock anchor pipe 10 at this end is wrapped and sealed with waterproof geotextile 7; the bedrock anchor pipe 10 at the lower end of the concrete anchor pipe 9 is exposed from the concrete anchor pipe 9 by more than 1.5 m, and the upper line generally does not exceed 1.8 m, and the gap between the inner wall of the lower part of the concrete anchor pipe 9 and the outer wall of the bedrock anchor pipe 10 is filled with a rubber piston sleeve or waterproof cement 5 to ensure stable waterproofing. The gap between the concrete anchor pipe 9 and the bedrock anchor pipe 10 is wrapped and sealed with waterproof geotextile 7 to prevent the thick slurry from falling into the gap between the bedrock anchor pipe 10 and the concrete anchor pipe 9 when grouting into the bedrock anchor pipe 10, so that the concrete anchor pipe 9 cannot change position with the lift, affecting the subsequent monitoring results. In this process, the hole depth and the lengths of the concrete anchor pipe 9 and the bedrock anchor pipe 10 are calculated to ensure that the part of the concrete anchor pipe 9 entering the bedrock 6 is wrapped with a rubber piston or waterproof cement 5 to prevent contact with the cement slurry 4.

[0031] The method for grouting under the pipe in step three is to insert the lower end of the bedrock anchor pipe 10 into the drill hole, and insert the part of the bedrock anchor pipe 10 exposed outside the concrete anchor pipe 9 into the drill hole of the rock foundation 6 section by 8-12 cm; the pipe section of the concrete anchor pipe 9 which is not wrapped with the waterproof geotextile 7 is strictly prohibited to enter the drill hole of the rock foundation 6 section; the upper end of the concrete anchor pipe 9 is stretched out of the drill hole by 8-12 cm, and the upper end of the bedrock anchor pipe 10 is stretched out of the drill hole by 8-12 cm; the positions of the concrete anchor pipe 9 and the bedrock anchor pipe 10 are fixed, and when fixed, the concrete anchor pipe 9 is fixed at the hole by welding steel bars on the pipe wall, and the bedrock anchor pipe 10 and the concrete anchor pipe 9 are connected into one by the cement 5 and the waterproof geotextile 7; the grouting pipe is installed on the bedrock anchor pipe 10, and the cement slurry 4 with a mass ratio of cement to water of 0.5:1 is grouted into the bedrock anchor pipe 10 until the thick slurry comes out of the drill hole to end the grouting.

[0032] After the final setting of the slurry, the monitoring device is installed, and the installation method is to weld the mobile end instrument support 3 on the outer side wall of the upper part of the concrete anchor pipe 9, and weld the fixed end instrument support 1 on the outer side wall of the bedrock anchor pipe 10, and make the fixed end instrument support 1 and the mobile end instrument support 3 located on the same vertical plane, the height difference between the fixed end instrument support 1 and the mobile end instrument support 3 is 28-32 cm, and 30 cm is the best; the upper and lower ends of the monitoring device are connected with the fixed end instrument support 1 and the mobile end instrument support 3 respectively; then the initial value is read, and the monitoring device is installed, and the first stage consolidation grouting lifting monitoring can be carried out. In order to facilitate the installation of the fixed end instrument support 1 and the mobile end instrument support 3, the length of the upper end of the concrete anchor pipe 9 stretched out of the drill hole is generally less than the length of the upper end of the bedrock anchor pipe 10 stretched out of the drill hole.

[0033] After the first stage consolidation grouting is completed, the monitoring device and the supporting bracket are removed, the concrete anchor pipe 9 and the bedrock anchor pipe 10 are lengthened according to the thickness of the concrete pouring, and the concrete pouring surface is ensured to be exposed. After the final setting of the concrete, the removed monitoring device is installed according to the foregoing method, and the second stage consolidation grouting lifting monitoring can be carried out, and the cycle is repeated until all the consolidation grouting projects of the unit project are completed. After the consolidation grouting of the unit project is completed, the monitoring device is removed, the waterproof geotextile 7 between the concrete anchor pipe 9 and the bedrock anchor pipe 10 is taken out, and the concrete anchor pipe 9 is filled with thick slurry, and the lifting monitoring of the whole unit project is completed.

[0034] The method for lengthening the concrete anchor pipe 9 and the bedrock anchor pipe 10 is to connect the thick joint pipe to the top end of the concrete anchor pipe 9 and the thin joint pipe to the top end of the bedrock anchor pipe 10 respectively through threads.

[0035] The diameter of the concrete anchor pipe 9 in the embodiment is consistent with the diameter of the thick joint pipe, and the diameter of the bedrock anchor pipe 10 is consistent with the diameter of the thin joint pipe.

[0036] The present application solves the problem of multiple punching and repeated installation of casing in the process of lifting monitoring of a unit project in multiple stages.

[0037] In the case of no conflict, the skilled in the art can combine the technical features related in each of the above examples according to the actual situation to achieve the corresponding technical effects, and the specific combinations are not described one by one here.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0040] The above is only the preferred embodiment of the present application, and the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A digital assembled reusable lifting monitoring device for monitoring the lifting of a covered heavy consolidation grouting of a concrete section (8) poured on a slope dam bedrock (6), characterized in that: The invention comprises a fixed-end instrument bracket (1), a monitoring device, a mobile-end instrument bracket (3), a concrete anchor pipe (9), a bedrock anchor pipe (10), a thick pipe and a thin pipe; the bedrock anchor pipe (10) is placed in the concrete anchor pipe (9); the mobile-end instrument bracket (3) is connected to the outer wall of the concrete anchor pipe (9); the fixed-end instrument bracket (1) is connected to the outer wall of the bedrock anchor pipe (10); the thick pipe is detachably connected to the top end of the concrete anchor pipe (9); the thin pipe is detachably connected to the top end of the bedrock anchor pipe (10); and the monitoring device is connected between the fixed-end instrument bracket (1) and the mobile-end instrument bracket (3).

2. A digitally assembled, reusable lifting monitoring device according to claim 1, characterized in that: The monitoring device comprises a displacement sensor (2) and a sleeve (13); the displacement sensor (2) is placed in the sleeve (13); the sleeve (13) is connected to a mobile end instrument bracket (3); and the top end of the displacement sensor (2) is connected to a fixed end instrument bracket (1).

3. The digitally assembled, reusable lifting monitoring device according to claim 1, characterized in that: The connecting ends of the thick pipe and the thin pipe are respectively provided with threads for upper and lower connection; the top side walls of the concrete anchor pipe (9) and the bedrock anchor pipe (10) are provided with threads for connection with the thick pipe and the thin pipe.

4. A method for monitoring the lifting of a slope dam foundation with heavy consolidation grouting, characterized by: The digital assembled reusable lifting monitoring device according to any one of claims 1 to 3 comprises the following steps: Step 1: Position the drilling hole; Step 2: Install the concrete anchor pipe (9) and the bedrock anchor pipe (10); A waterproof device is installed in the gap between the concrete anchor pipe (9) and the bedrock anchor pipe (10); Step 3: Lower the pipe and grout; Step 4: Install the monitoring device; After the grouting slurry has finally set, the monitoring device is installed; Step 5: Read the initial lift value measured by the monitoring device; Step 6: Read the concrete lift measurement value during the first stage of consolidation grouting; Step 7: After the first stage of consolidation grouting is completed, the orifice monitoring device and the associated fixed-end instrument bracket (1) and mobile-end instrument bracket (3) are removed; Step 8: Extend the concrete anchor pipe (9) and the bedrock anchor pipe (10); Extending the concrete anchor pipe (9) and the bedrock anchor pipe (10) according to the concrete pouring thickness; Step 9: Install the orifice monitoring device for the second time and read the initial lift value; Step 10: Second stage consolidation grouting lift monitoring; Repeat steps 7 to 10 for each additional stage of consolidation grouting until all consolidation grouting works of the entire unit project are completed, and measure the lift value of each consolidation grouting section; The orifice monitoring device is removed, the detachable concrete anchor pipe (9) and the bedrock anchor pipe (10) are taken out, and the remaining holes are filled with thick slurry. The lifting monitoring of the entire unit project is completed.

5. The method for monitoring the lifting of a slope dam foundation with heavy consolidation grouting according to claim 4, characterized in that: The specific method of positioning the drilling hole in step 1 is to drill a hole using a geological drill according to the set installation position of the lifting monitoring, and to take a core, and to determine the depth of the bedrock (6) based on the core sample.

6. A method for monitoring the lifting of a slope dam foundation with heavy consolidation grouting according to claim 5, characterized in that: The depth of the borehole into the bedrock (6) is 1.5m to 2.0m.

7. The method for monitoring the lifting of a slope dam foundation with heavy consolidation grouting according to claim 4, characterized in that: The method of assembling the casing in step 2 is as follows: the length of the bedrock anchor pipe (10) and the concrete anchor pipe (9) is determined according to the drilling depth in step 1; the length of the bedrock anchor pipe (10) is 48 to 52 cm longer than the hole depth, and the length of the concrete anchor pipe (9) is 159 to 161 cm shorter than the length of the bedrock anchor pipe (10); the bedrock anchor pipe (10) is inserted into the concrete anchor pipe (9); the bedrock anchor pipe (10) at the upper end of the concrete anchor pipe (9) is exposed 9 to 11 cm from the concrete anchor pipe (9), and the end of this end is The gap between the concrete anchor pipe (9) and the bedrock anchor pipe (10) is wrapped and sealed with a waterproof geotextile (7); the bedrock anchor pipe (10) at the lower end of the concrete anchor pipe (9) is exposed more than 1.5 m from the concrete anchor pipe (9), and the gap between the inner wall of the lower concrete anchor pipe (9) and the outer wall of the bedrock anchor pipe (10) is filled with a rubber piston sleeve or waterproof cement (5), and the gap between the end of the concrete anchor pipe (9) and the bedrock anchor pipe (10) is wrapped and sealed with a waterproof geotextile (7).

8. The method for monitoring the lifting of a slope dam foundation with heavy consolidation grouting according to claim 7, characterized in that: The method for grouting the bedrock anchor pipe (10) in step 3 is to insert the lower end of the bedrock anchor pipe (10) into the borehole, and to insert the portion of the bedrock anchor pipe (10) exposed outside the concrete anchor pipe (9) into the borehole of the bedrock (6) section, and to be 8 to 12 cm away from the bottom of the borehole; the section of the concrete anchor pipe (9) that is not wrapped with the waterproof geotextile (7) is strictly prohibited from entering the borehole of the bedrock (6) section; the upper end of the concrete anchor pipe (9) extends 8 to 12 cm from the borehole opening, and the upper end of the bedrock anchor pipe (10) extends 8 to 12 cm from the concrete anchor pipe (9), and the positions of the concrete anchor pipe (9) and the bedrock anchor pipe (10) are fixed; the grouting pipe is installed on the bedrock anchor pipe (10), and a thick slurry with a mass ratio of cement to water of 0.5:1 is poured into the bedrock anchor pipe (10) until the thick slurry emerges from the borehole opening to end the grouting.

9. The method for monitoring the lifting of a slope dam foundation with a heavy cover and consolidation grouting according to claim 1, characterized in that: The method for installing the monitoring device in step 4 is to fix the mobile end instrument bracket (3) on the outer side wall of the upper part of the concrete anchor pipe (9), and to fix the fixed end instrument bracket (1) on the outer side wall of the bedrock anchor pipe (10), and to make the fixed end instrument bracket (1) and the mobile end instrument bracket (3) be located on the same vertical plane, and the height difference between the fixed end instrument bracket (1) and the mobile end instrument bracket (3) be 28 to 32 cm; and to connect the upper and lower ends of the monitoring device to the fixed end instrument bracket (1) and the mobile end instrument bracket (3), respectively.

10. The method for monitoring the lifting of a slope dam foundation with heavy consolidation grouting according to claim 1, characterized in that: The method for extending the concrete anchor pipe (9) and the bedrock anchor pipe (10) in step eight is to connect the thick connecting pipe to the top end of the concrete anchor pipe (9) and the thin connecting pipe to the top end of the bedrock anchor pipe (10) through threads.

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