High-precision dam elevation transmission method and device

Abstract

The invention relates to the technical field of elevation measurement, in particular to a high-precision dam elevation transmission method and device, and the high-precision dam elevation transmission method comprises the following steps: S1, installing an elevation transmission device, and measuring the initial elevation of each point location and the initial elevation difference between the point locations; s2, during the ith measurement, measuring the elevation difference between the elevation transmission device and the dam foundation surface; s3, measuring the absolute elevation of the leveling point of the dam crest according to the check base point near the dam crest and the working base points on the two banks; s4, calculating the elevation of the dam foundation leveling mark point by using the data in S1 and S2 and the absolute elevation of the dam crest leveling point in S3; and S5, measuring other benchmarks of the dam foundation surface by taking the calculated dam foundation benchmark point as a new measurement starting point. The elevation can be accurately transmitted under the condition of different temperatures, the influence of humidity and light is avoided, the elevation does not need to be transferred to the dam foundation surface from the dam top during elevation measurement, the elevation is directly transmitted to the dam foundation surface from the dam top, the workload can be effectively reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of elevation measurement, in particular to a high-precision dam elevation transmission method and device. Background Art

[0002] The settlement observation of the dam body and foundation of a hydropower station dam is an important means of evaluating the deformation and safety of the dam. According to the provisions of DL / T5178-2016 "Technical Specifications for Safety Monitoring of Concrete Dams", for gravity dams above level 2 and arch dams above level 3, the deformation of the dam body and foundation is a necessary monitoring item. At present, settlement observation is mainly based on leveling. There are working base points on the dam top and dam foundation respectively, and the verification base points are generally set in the downstream area of ​​the dam. When verifying the working base points in the dam foundation corridor, it is necessary to measure from the dam top to the dam foundation, and multiple level transfer station measurements are required in the middle. The elevation difference between the dam top and the dam foundation generally ranges from tens of meters to hundreds of meters. The transfer station measurement process needs to pass through high and steep steps, which is time-consuming and labor-intensive, and the monitoring accuracy cannot be guaranteed.

[0003] Currently, the main means of elevation transmission include laser ranging, electromagnetic ring ranging and lead wire ranging. Due to the influence of light, temperature and humidity, the measurement accuracy is low and cannot meet the requirements of current standards and specifications. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above-mentioned problem of low efficiency in elevation measurement, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a high-precision dam elevation transmission method.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-precision dam elevation transmission method, comprising the following steps:

[0008] S1, install the elevation transfer device and measure the initial elevation of each point and the initial elevation difference between the points;

[0009] S2, when making the i-th measurement, measure the elevation difference between the elevation transfer device and the dam base surface;

[0010] S3, based on the check base point near the dam crest and the working base points on both banks, measure the absolute elevation of the dam crest level mark;

[0011] S4, using the data in S1 and S2 and the absolute elevation of the dam top leveling point in S3, calculate the elevation of the dam base leveling point;

[0012] S5, taking the calculated dam foundation leveling mark point as a new starting point to measure other leveling points on the dam foundation surface.

[0013] As a preferred solution of the high-precision dam elevation transfer method described in the present invention, in which: in S1, a plurality of dam top leveling marks and dam base leveling marks are provided on the dam and at least one of them is within a 3m diameter range around the elevation transfer device.

[0014] As a preferred solution of the high-precision dam elevation transfer method described in the present invention, in which: in S1, the initial elevations of the dam top leveling mark and the dam base leveling mark are measured by traditional leveling measurement and the initial elevation difference is calculated.

[0015] As a preferred solution of the high-precision dam elevation transfer method described in the present invention, wherein: in S1, the initial elevation difference between the elevation transfer device and the dam base surface is calculated by measuring the card plate, and the initial reading of the telemetry benchmark of the elevation transfer device is measured by a photoelectric telemetry coordinate meter.

[0016] As a preferred solution of the high-precision dam elevation transmission method described in the present invention, wherein: S1 is the initial measurement after the installation of the elevation measuring device, the elevation measuring device is installed during the dam construction, and in S2, the i-th measurement is the subsequent measurement after the installation of the elevation measuring device.

[0017] As a preferred solution of the high-precision dam elevation transfer method described in the present invention, the verification base point and working base point in S3 are the verification base points set near the dam crest and the working base points set on both sides of the dam crest required for dam construction. The verification base point and the working base point can be regarded as fixed points or absolutely accurate points obtained through repeated measurement of the control network.

[0018] As a preferred solution of the high-precision dam elevation transfer method described in the present invention, in S5, the dam base surface leveling mark point after measurement and calculation is used as a new starting point for elevation transfer, and the elevations of other dam base surface leveling marks are measured in turn.

[0019] The beneficial effects of the high-precision dam elevation transfer method described in the present invention are as follows: the present invention is suitable for the elevation transfer between the dam crest and the dam foundation of a hydropower station dam by using an elevation transfer device. After an initial elevation measurement, subsequent measurements can quickly calculate the elevation of the dam foundation leveling mark through the elevation transfer device arranged on the dam body, so that it can be used as a working base point to quickly measure the elevation of other leveling measurement points. The elevation can be accurately transferred under different temperatures to avoid the influence of humidity and light. When measuring the elevation, there is no need to transfer from the dam crest to the dam foundation surface. The elevation can be directly transferred from the dam crest to the dam foundation surface, which can effectively reduce the workload and improve work efficiency.

[0020] Given that there is still the problem of how to transmit elevation with high precision.

[0021] The present invention also provides the following technical solution: a dam elevation transmission device, used for the above-mentioned high-precision dam elevation transmission method, also includes a reference component, including a dam body, and a starting point for measuring arranged on the dam body; an elevation transmission component, including an installation component arranged on the dam body, a measuring component arranged on the installation component, and an artificial measuring component arranged at the bottom end of the measuring component.

[0022] As a preferred solution of the dam elevation transmission device described in the present invention, the installation assembly includes a fixed plate arranged on the dam body, a base arranged on the fixed plate, a protective tube arranged on the fixed plate, and a support ring arranged in the protective tube.

[0023] As a preferred solution of the dam elevation transmission device described in the present invention, the measuring assembly includes a first measuring rod and a second measuring rod arranged on a base, and a telemetry coordinate meter arranged at the bottom ends of the first measuring rod and the second measuring rod.

[0024] The beneficial effects of the dam elevation transmission device described in the present invention: the present invention can avoid temperature influence through the expansion coefficient of the two metal measuring rods by setting two metal measuring rods with different materials and different expansion coefficients. The top ends of the two measuring rods are fixed on the top of the dam, and the bottom ends are located in the dam foundation gallery. The bottom of the measuring rod can be directly measured by a telemetry coordinate meter, avoiding the influence of humidity, light and other environmental factors during long-distance laser measurement or level measurement. The measurement accuracy is higher, and the working base point elevation of the dam foundation surface can be quickly and accurately calculated each time the elevation is measured, thereby transmitting the elevation and measuring the elevation of other leveling measurement points. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0026] Figure 1 The figure is an overall schematic diagram of a dam elevation transfer device.

[0027] Figure 2 The figure is a schematic diagram of the installation components of a dam elevation transmission device.

[0028] Figure 3 The present invention is a schematic diagram of a measuring component and a manual measurement component of a dam elevation transmission device. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from the description, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] The first embodiment of the present invention provides a high-precision dam elevation transmission method, comprising the following steps:

[0034] S1, install the elevation transfer device and measure the initial elevation of each point and the initial elevation difference between the points;

[0035] S2, when performing the i-th measurement, measuring the elevation difference between the elevation transfer device and the dam base surface 101c;

[0036] S3, based on the check base point near the dam crest 101b and the working base points on both banks, measure the absolute elevation of the leveling mark point on the dam crest 101b;

[0037] S4, using the data in S1 and S2 and the absolute elevation of the dam crest level point 101b in S3, calculate the elevation of the dam base level point 102b;

[0038] S5, using the calculated dam foundation leveling mark point 102b as a new starting point 102 to measure other leveling points on the dam foundation surface 101c.

[0039] Specifically, the elevation transmission device needs to be installed during the construction of the dam or additionally. The top of the elevation transmission device is fixed on the dam crest 101b, and the bottom extends to the dam base 101c. The elevation transmission device can avoid the interference of temperature, humidity, and optics, accurately transmit the elevation and facilitate measurement. A steel pipe and an aluminum pipe are provided in the elevation transmission device. The linear expansion coefficients of the two have been tested and the two are parallel to each other and kept fixed. The bottom ends of the steel pipe and the aluminum pipe are both provided with a telemetering pole 203a for measurement. In S1, the elevation H of the dam crest leveling mark 102a and the elevation H of the dam base leveling mark 102b are measured. 10 , H 20 .

[0040] Furthermore, in S1, a plurality of dam top leveling marks 102a and dam base leveling marks 102b are provided on the dam, and at least one of them is within a 3m diameter range around the elevation transfer device.

[0041] Furthermore, in S1, the initial elevations of the dam top leveling point 102a and the dam base leveling point 102b are measured through traditional leveling measurement and the initial elevation difference is calculated. The traditional method is to use existing equipment such as a level to perform the first measurement of each leveling point. Since the dam has not settled at this time, it can be used as an absolute benchmark.

[0042] Furthermore, in S1, the initial elevation difference between the elevation transfer device and the dam base surface 101c is measured by the measuring card plate 203b, and the initial reading of the telemetry pole 203a of the elevation transfer device is measured by the photoelectric telemetry coordinate meter 202c. At this time, the dam has not settled and the elevation transfer device has not deformed, so it can be used as an initial reference value. The photoelectric telemetry coordinate meter 202c is also used to measure the bottom end of the elevation transfer device for reference.

[0043] Furthermore, S1 is the initial measurement after the installation of the elevation measuring device, which is installed during the construction of the dam. In S2, the i-th measurement is the subsequent measurement after the installation of the elevation measuring device.

[0044] Furthermore, the check base point and working base point in S3 are the check base points set near the dam crest 101b and the working base points set on both sides of the dam crest 101b required by the dam construction. The check base point and the working base point can be regarded as fixed points or absolutely accurate points obtained through repeated measurement of the control network. The check base point and the working base point are used as points for checking data during the elevation transfer process.

[0045] Furthermore, in S5, the dam foundation leveling mark point 102b after measurement and calculation is used as a new starting point for elevation transfer, and the elevations of other dam foundation leveling mark points 102b are measured in turn.

[0046] In S2, the elevation difference between the dam crest 101b and the dam base 101c is calculated using the following formula based on the various data measured in S1:

[0047]

[0048] Among them, H g0 , H l0 are the initial elevation differences between the steel pipe reading card plate 203b, the aluminum pipe reading card plate 203b and the dam base surface 101c; H gi , H li are the ith artificially measured elevation differences between the steel pipe reading card plate 203b, the aluminum pipe reading card plate 203b and the dam base surface 101c; a g 、a l are the linear expansion coefficients of the steel pipe and the aluminum pipe after inspection and calculation; H0 is the initial elevation difference between the dam crest leveling point 102a and the dam base leveling point 102b; H i is the elevation difference from the dam crest 101b to the dam base 101c obtained in the i-th measurement.

[0049] Since the automated measurement data difference between the steel tube telemetry pole 203a and the aluminum tube telemetry pole 203a is theoretically consistent with the manual measurement data difference, the elevation difference from the dam crest 101b to the dam base 101c in the later measurement process can also be expressed by the following formula.

[0050]

[0051] Among them, Z G0 , Z I0 The photoelectric telemetry coordinate instrument 202c initially measures the readings of the steel pipe telemetry pole 203a and the aluminum pipe telemetry pole 203a; Z gi , Z li are the readings of the steel pipe telemetry pole 203a and the aluminum pipe telemetry pole 203a measured by the photoelectric telemetry coordinate instrument 202c for the i-th time; a g 、a l are the linear expansion coefficients of the steel pipe and the aluminum pipe after inspection and calculation; H0 is the initial elevation difference between the dam crest leveling point 102a and the dam base leveling point 102b; H i is the elevation difference from the dam crest 101b to the dam base 101c obtained in the i-th measurement.

[0052] In S3, the absolute height H of the dam crest level mark 102a is measured by leveling using the check base point and the working base points on both sides of the dam crest 101b. 1i , then the elevation of the dam foundation leveling point 102b in S4 is H 2i =H 1i -H i .

[0053] In S5, due to the elevation H of the dam foundation leveling point 102b 2i It has been calculated, so the dam foundation leveling mark 102b can be used to perform leveling measurement on other leveling points to achieve the effect of transmitting the elevation with high precision.

[0054] The comparison between the leveling measurement data and the elevation transfer measurement data of a certain engineering example is shown in the following table:

[0055]

[0056] The elevation of the dam foundation leveling point 102b obtained in the i-th measurement is 2168.9289m. 102b-1-102b-8 in the table are other leveling points on the dam foundation. By comparing the elevation data of the dam foundation leveling point 102b obtained by the traditional leveling measurement and the method of the present invention, the difference between the two is only 0.2mm. It can be verified that the device shows high accuracy in the elevation transfer process, which is significantly better than other elevation transfer methods and meets the accuracy required by the leveling measurement.

[0057] Example 2

[0058] Reference Figure 1-Figure 2 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a dam elevation transfer device for the above-mentioned high-precision dam elevation transfer method, including a reference component, including a dam body 100, a starting point 102 arranged on the dam body 100; an elevation transfer component 200, including an installation component 201 arranged on the dam body 100, a measuring component 202 arranged on the installation component 201, and an artificial measurement component 203 arranged at the bottom of the measuring component 202.

[0059] Specifically, the dam body 100 includes a dam body 101a, a dam top 101b and a dam base surface 101c. The dam base surface 101c can be a dam base corridor, etc. The starting point 102 is set within 3m near the measuring component 202 for measurement and calibration. The installation component 201 is used to fix the measuring component 202. The measuring component 202 and the manual measurement component 203 are used to read the readings of the measuring component 202. The starting point 102 includes a dam top leveling mark 102a set on the dam top 101b and a dam base leveling mark 102b set on the dam base surface 101c, both of which are used to calculate the elevation.

[0060] Furthermore, the installation assembly 201 includes a fixed plate 201b arranged on the dam body 100, a base 201a arranged on the fixed plate 201b, a protective tube 201c arranged on the fixed plate 201b, and a support ring 201d arranged in the protective tube 201c. A concrete pier is arranged on the dam top 101b. The fixed plate 201b can be made of a steel plate. The fixed plate 201b is fixed on the concrete pier. The fixed plate 201b should have sufficient strength and rigidity to bear the weight of the steel pipe and the aluminum pipe for a long time without plastic deformation. The protective tube 201c protects the measuring rod. A support ring 201d made of rubber and with a thickness of not less than 25 mm is installed every 2m in the protective tube 201c to ensure that the first measuring rod 202a and the second measuring rod 202b are in a relatively parallel state and do not shake.

[0061] Furthermore, the measuring assembly 202 includes a first measuring rod 202a and a second measuring rod 202b disposed on the base 201a, and a telemetering coordinate meter 202c disposed at the bottom of the first measuring rod 202a and the second measuring rod 202b. The first measuring rod 202a and the second measuring rod 202b are respectively a steel pipe and an aluminum pipe. The steel pipe and the aluminum pipe should be products of the same furnace as far as possible. The linear expansion coefficient of the pipe should be tested according to the working temperature range. Both are pipes with a diameter of 50 mm, and the length is determined according to the height from the dam top 101b to the corridor. The first measuring rod 202a The space and distance between the bottom of the second measuring rod 202b and the manual reading component 203 are reserved. The telemetering coordinate instrument 202c adopts a photoelectric telemetering coordinate instrument 202c with a measuring range of 0 to 50 mm and a measuring accuracy of ±0.1 mm. The working environment requires a temperature of -20 to +60°C and a humidity of ≤95%. The overall moisture-proof ability is not less than the IP67 protection level and can operate stably in a humid environment. The photoelectric telemetering coordinate instrument 202c is composed of a photoelectric module, a measurement and control module, and a communication module. The measured line does not need to be attached to other sensors, and non-contact measurement can be achieved. The CCD output is a digital signal, which is transmitted to the computer monitoring system through an optical cable.

[0062] The rest of the structure is the same as that of Example 1.

[0063] Operation process: During the dam construction process, a hole is reserved for installing the elevation transfer device, and the hole is vertically connected from the top of the dam to the dam foundation corridor. The first measuring rod 202a and the second measuring rod 202b are installed on the fixed plate 201b through the base 201a, and the support rings 201d are installed at equal intervals in the protective tube 201c. The protective tube 201c equipped with the support rings 201d is placed on the outer edges of the first measuring rod 202a and the second measuring rod 202b, and it is ensured that the internal support rings 201d should pass through the first measuring rod 202a and the second measuring rod 202b respectively, and the top of the protective tube 201c is fixed on the base 201a. The above-mentioned installed device is vertically hoisted into the hole, and the fixed plate 201b and the base 201a are above the hole on the dam top 101b, and concrete piers are poured on the fixed plate 201b and the base 201a. In the dam base surface 101c, the bottoms of the first measuring rod 202a and the second measuring rod 202b are respectively arranged and installed with a photoelectric telemetry coordinate instrument 202c and a manual measurement and reading assembly 203. Leveling points 102a and 102b are respectively set on the dam top 101b and the dam base surface 101c near the elevation transmission device.

[0064] Example 3

[0065] Reference Figure 1-Figure 3 , which is the third embodiment of the present invention. Different from the above embodiments, the manual measurement and reading component 203 includes a telemetry pole 203a arranged at the bottom ends of the first measuring rod 202a and the second measuring rod 202b, a measurement and reading card board 203b arranged on the telemetry pole 203a, and a manual measurement and reading instrument 203c arranged under the measurement and reading card board 203b.

[0066] Specifically, at the bottom of the first measuring rod 202a and the second measuring rod 202b, a measuring card plate 203b and a telemetry mark 203a are arranged on both sides perpendicular to the measuring rod direction. The measuring card plate 203b and the telemetry mark 203a need to have good rigidity and not be easily deformed. In order to prevent the projections of the telemetry marks 203a on the two measuring rods in the photoelectric telemetry coordinate instrument 202c from affecting each other, the telemetry marks 203a of the two measuring rods should be 2cm apart in elevation.

[0067] Furthermore, the manual reading instrument 203c adopts a dial indicator measuring instrument with a measurement accuracy of 0.01mm and a measuring range of 0 to 20mm.

[0068] Furthermore, one end of the manual reading instrument 203c is fixed on the basic platform of the dam base surface 101c (dam base corridor), and the other side is vertically contacted with the reading card plate 203b through a dial indicator measuring instrument, so as to manually measure the first measuring rod 202a and the second measuring rod 202b.

[0069] The rest of the structure is the same as that of Example 2.

[0070] Operation process: Install the measuring card plate 203b and the telemetry mark 203a at the bottom of the two measuring rods and perpendicular to the direction of the measuring rods. The measuring card plate 203b and the telemetry mark 203a are in opposite directions. The measuring mark 203a extends into the photoelectric telemetry coordinate meter 202c. A fixed manual measuring instrument 203c is installed on the dam base surface 101c below the measuring card plate 203b.

[0071] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0072] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0073] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-precision dam elevation transmission method, characterized in that: The following steps are included: S1, install the elevation transfer device and measure the initial elevation of each point and the initial elevation difference between the points; S2, when performing the i-th measurement, measuring the elevation difference between the elevation transfer device and the dam base surface (101c); S3, based on the check base point near the dam crest (101b) and the working base points on both banks, measure the absolute elevation of the level mark on the dam crest (101b); S4, using the data in S1 and S2 and the absolute elevation of the dam crest (101b) leveling point in S3, calculate the elevation of the dam foundation leveling point (102b); S5, using the calculated dam foundation leveling mark point (102b) as a new starting point (102) to measure other leveling points on the dam foundation surface (101c).

2. The high-precision dam elevation transmission method according to claim 1, characterized in that: In S1, a plurality of dam crest leveling points (102a) and dam base leveling points (102b) are provided on the dam, and at least one of them is within a 3m diameter range around the elevation transfer device.

3. The high-precision dam elevation transmission method according to claim 2, characterized in that: In S1, the initial elevations of the dam top leveling mark (102a) and the dam base leveling mark (102b) are measured by conventional leveling and the initial elevation difference is calculated.

4. The high-precision dam elevation transmission method according to claim 3, characterized in that: In S1, the initial elevation difference between the elevation transfer device and the dam base surface (101c) is calculated by measuring the card plate (203b), and the initial reading of the telemetry pole (203a) of the elevation transfer device is measured by the photoelectric telemetry coordinate meter (202c).

5. The high-precision dam elevation transmission method according to claim 4, characterized in that: S1 is the initial measurement after the installation of the elevation measuring device, which is installed during the dam construction. In S2, the i-th measurement is the subsequent measurement after the installation of the elevation measuring device.

6. The high-precision dam elevation transmission method according to claim 5, characterized in that: The check base point and working base point in S3 are the check base points set near the dam crest (101b) and the working base points set on both sides of the dam crest (101b) required for dam construction. The check base point and working base point can be regarded as fixed points or absolutely accurate points obtained through repeated measurement of the control network.

7. The high-precision dam elevation transmission method according to claim 6, characterized in that: In S5, the dam foundation surface leveling mark point (102b) measured and calculated is used as a new starting point (102) for elevation transfer, and the elevations of other dam foundation surface leveling mark points (102b) are measured in sequence.

8. A dam elevation transmission device, used in the high-precision dam elevation transmission method according to any one of claims 1 to 7, characterized in that: include, The reference component (100) comprises a dam body (101) and a starting point (102) arranged on the dam body (101); The elevation transmission component (200) comprises a mounting assembly (201) arranged on the dam body (101), a measuring assembly (202) arranged on the mounting assembly (201), and a manual measurement and reading assembly (203) arranged at the bottom end of the measuring assembly (202).

9. The dam elevation transmission device according to claim 8, characterized in that: The installation assembly (201) comprises a fixing plate (201b) arranged on the dam body (101), a base (201a) arranged on the fixing plate (201b), a protection tube (201c) arranged on the fixing plate (201b), and a support ring (201d) arranged in the protection tube (201c).

10. The dam elevation transmission device according to claim 9, characterized in that: The measuring assembly (202) comprises a first measuring rod (202a) and a second measuring rod (202b) arranged on a base (201a), and a telemetry coordinate meter (202c) arranged at the bottom ends of the first measuring rod (202a) and the second measuring rod (202b).

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