Roller compacted concrete dam based on prestress earthquake resistance and construction method thereof

Abstract

The invention provides a roller compacted concrete dam based on prestress seismic resistance and a construction method thereof. The roller compacted concrete dam comprises a dam body, branch pipes, prestressed steel bars, top anchorage devices and bottom anchorage devices. The dam body comprises a plurality of dam body units formed by layered pouring in the height direction; the branch pipe is embedded in the dam body during dam body pouring construction, and a mounting hole channel is formed in the branch pipe; the prestressed reinforcements penetrate through the mounting hole channels; the top anchorage device and the bottom anchorage device are connected with the two ends of the prestressed reinforcement correspondingly so as to be suitable for conducting prestressed tensioning and anchoring on the prestressed reinforcement. Prestress tensioning is conducted on the dam body through the prestressed steel bars, an active prestress area can be formed, the tensile stress caused by seismic oscillation is effectively eliminated, and the anti-seismic stability and safety of the dam body are remarkably enhanced; the installation of the prestressed reinforcements is realized by presetting the branch pipes, so that the construction efficiency can be greatly improved, and the damage to the internal structure of the concrete in the construction process is reduced.

Description

Technical Field

[0001] This application relates to the field of earthquake resistance of hydraulic engineering, and particularly to a roller compacted concrete dam based on prestressed earthquake resistance and its construction method. Background Art

[0002] At present, roller compacted concrete dams have obvious deficiencies in seismic performance. When encountering external forces such as earthquakes, cracks, spalling, and even collapse are likely to occur on the dam surface of roller compacted concrete dams, seriously affecting the overall stability and safety of the dam. The main reason is that the tensile strength of the dam surface material is relatively low, making it difficult to effectively resist the tensile stress caused by seismic waves.

[0003] In related technologies, the tensile strength of roller compacted concrete dams is usually improved by applying prestress to the dam body. However, prestress is usually applied by drilling holes and installing prestressed steel bars after the concrete structure is completed. This not only increases the construction cost and prolongs the construction period, but may also have an adverse impact on the dam body structure. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of this application is to provide a roller compacted concrete dam based on prestressed earthquake resistance and its construction method, which can form an effective prestressed area in the roller compacted concrete dam by pre-setting installation channels and prestress tensioning, and can improve the construction efficiency and seismic performance simultaneously.

[0005] This application provides a roller compacted concrete dam based on prestressed earthquake resistance. The roller compacted concrete dam includes a roller compacted concrete dam body, branch pipes, prestressed steel bars, top anchors, and bottom anchors; the roller compacted concrete dam body includes a plurality of dam body units formed by layered pouring in the height direction; the branch pipes are embedded in the roller compacted concrete dam body during the pouring construction of the roller compacted concrete dam body, and installation channels are formed inside the branch pipes; the prestressed steel bars penetrate through the installation channels, one end of the prestressed steel bar protrudes from the top surface of the roller compacted concrete dam body, and the other end protrudes from the bottom surface of the roller compacted concrete dam body; the top anchors and the bottom anchors are respectively connected to both ends of the prestressed steel bars to be suitable for prestress tensioning and anchoring of the prestressed steel bars.

[0006] For the roller compacted concrete dam according to the present application, prestressing the dam body through prestressed steel bars can form an active prestressed concrete area in the dam body, which can effectively eliminate the tensile stress caused by seismic motion, effectively avoid damage phenomena such as cracks and spalling in the dam body, and at the same time can also limit the expansion of cracks, thereby significantly enhancing the seismic stability and safety of the dam body. By installing the prestressed steel bars in the way of presetting branch pipes in the dam body, the cumbersome process of drilling can be omitted, the construction process of the prestressed steel bars can be facilitated, the construction efficiency can be greatly improved, the construction period can be shortened, and the construction cost can be significantly reduced, enabling the project to be put into use faster; at the same time, presetting branch pipes can reduce the damage to the internal structure of the concrete during the construction process, avoid the stress concentration and crack expansion problems that may be caused by traditional post-drilling, further improve the overall strength and durability of the roller compacted concrete dam, enable the roller compacted concrete dam to better resist the influence of the natural environment and external forces, and extend the service life.

[0007] According to some embodiments of the present application, the branch pipe includes a plurality of branch pipe units, each branch pipe unit is embedded in a dam body unit, and two adjacent branch pipe units in the height direction are connected end to end.

[0008] According to some embodiments of the present application, there are at least two branch pipes, one of which is configured as a first branch pipe, and the first branch pipe is arranged close to the upstream surface of the roller compacted concrete dam body; one is configured as a second branch pipe, and the second branch pipe is arranged close to the downstream surface of the roller compacted concrete dam body.

[0009] According to some embodiments of the present application, the first branch pipe extends along the height direction.

[0010] According to some embodiments of the present application, a slope is formed on the downstream surface of the roller compacted concrete dam body, and at least a part of the second branch pipe extends parallel to the slope.

[0011] According to some embodiments of the present application, one end of each branch pipe unit is formed with an internal thread, and the other end is formed with an external thread, and two adjacent branch pipe units are connected by the cooperation of the internal thread and the external thread.

[0012] According to some embodiments of the present application, the top anchor forms a grouting hole communicating with the installation hole, and the grouting hole and the installation hole are filled with slurry to be suitable for the fixed connection of the prestressed steel bar and the branch pipe.

[0013] According to some embodiments of the present application, there are a plurality of prestressed steel bars, and the plurality of prestressed steel bars are connected by a top anchor and a bottom anchor.

[0014] According to some embodiments of the present application, the branch pipes are arranged at intervals along the width direction of the roller compacted concrete dam body.

[0015] The present application also proposes a construction method for a roller compacted concrete dam, and the construction method includes the following steps:

[0016] Build a grouting formwork at the preset position of the roller compacted concrete dam, install a branch pipe unit inside the grouting formwork, pour concrete and compact it by rolling to form a dam unit with the branch pipe unit embedded therein;

[0017] Repeat the above steps for layer-by-layer construction to form a roller compacted concrete dam body with embedded branch pipes; wherein, the roller compacted concrete dam body is composed of multiple dam units, the branch pipe is composed of multiple connected branch pipe units, and an installation duct is formed inside the branch pipe;

[0018] Insert prestressed steel bars into the installation duct;

[0019] Install anchor devices at both ends of the prestressed steel bars, and tension the prestressed steel bars. After reaching the target preset stress, anchor and lock them;

[0020] Grout into the installation duct, and after the grout solidifies, a roller compacted concrete dam is formed.

[0021] The additional aspects and advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a structural sectional view of a roller compacted concrete dam according to some embodiments of the present application;

[0024] Figure 2 is a structural schematic diagram of the top area of a roller compacted concrete dam according to some embodiments of the present application;

[0025] Figure 3 is a structural sectional view of the top area of a roller compacted concrete dam according to some embodiments of the present application;

[0026] Figure 4 is a structural schematic diagram of a branch pipe of a roller compacted concrete dam according to some embodiments of the present application;

[0027] Figure 5 is a structural sectional view of a branch pipe of a roller compacted concrete dam according to some embodiments of the present application.

[0028] Reference Signs:

[0029] Roller compacted concrete dam body 1; Dam unit 11; Branch pipe 2; Branch pipe unit 21; Internal thread 201; External thread 202; Installation duct 203; Prestressed steel bar 3; Top anchor device 4; Grouting hole 401; Bottom anchor device 5. Detailed Embodiments

[0030] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0031] Reference will be made below Figures 1 - 5 to describe a roller compacted concrete dam based on prestressed seismic resistance according to an embodiment of the present application.

[0032] The present application provides a roller compacted concrete dam based on prestressed seismic resistance. The roller compacted concrete dam includes a roller compacted concrete dam body 1, a branch pipe 2, prestressed steel bars 3, a top anchor 4, and a bottom anchor 5. The roller compacted concrete dam body 1 includes a plurality of dam body units 11 formed by layer-by-layer casting in the height direction. The branch pipe 2 is embedded in the roller compacted concrete dam body 1 during the casting construction of the roller compacted concrete dam body 1, and an installation duct 203 is formed inside the branch pipe 2. The prestressed steel bars 3 penetrate through the installation duct 203. One end of the prestressed steel bars 3 protrudes from the top surface of the dam of the roller compacted concrete dam body 1, and the other end protrudes from the bottom surface of the dam of the roller compacted concrete dam body 1. The top anchor 4 and the bottom anchor 5 are respectively connected to both ends of the prestressed steel bars 3 to be suitable for prestressing and anchoring the prestressed steel bars 3.

[0033] For the roller compacted concrete dam according to the present application, the branch pipe 2 is embedded in the roller compacted concrete dam body 1 (hereinafter referred to as the dam body 1) and is fixed integrally with the dam body 1. An installation duct 203 is formed inside the branch pipe 2. The prestressed steel bars 3 penetrate through the installation duct 203. One end protrudes from the top surface of the dam of the dam body 1 and is connected to the top anchor 4, and one end protrudes from the bottom surface of the dam of the dam body 1 and is connected to the bottom anchor 5. The tensioning effect of the prestressed steel bars 3 can be adjusted through the top anchor 4 and the bottom anchor 5 to cause the prestressed steel bars 3 to generate prestress. The prestressed steel bars 3 penetrate through the dam body units 11 of the multi-layer roller compacted concrete dam to apply prestress to the roller compacted concrete dam.

[0034] For the roller-compacted concrete dam according to the present application, prestressed tension is applied to the dam body 1 through the prestressed steel bars 3, so that an active prestressed concrete area can be formed in the dam body 1, which can effectively eliminate the tensile stress caused by ground motion, effectively avoid damage phenomena such as cracks and spalling in the dam body 1, and at the same time can also limit the expansion of cracks, thereby significantly enhancing the seismic stability and safety of the dam body 1. By presetting the branch pipes 2 in the dam body 1 to install the prestressed steel bars 3, the cumbersome process of drilling can be omitted, the construction process of the prestressed steel bars 3 can be facilitated, the construction efficiency can be greatly improved, the construction period can be shortened, and the construction cost can be significantly reduced, so that the project can be put into use faster; at the same time, presetting the branch pipes 2 can reduce the damage to the internal structure of the concrete during the construction process, evenly distribute the stress, and avoid the stress concentration and crack expansion problems that may be caused by traditional post-drilling, further improving the overall strength and durability of the roller-compacted concrete dam, enabling the roller-compacted concrete dam to better resist the influence of the natural environment and external forces, and extending the service life.

[0035] According to some embodiments of the present application, the branch pipe 2 includes a plurality of branch pipe units 21, each branch pipe unit 21 is embedded in a dam body unit 11, and two adjacent branch pipe units 21 in the height direction are connected end to end. In this embodiment, by setting a plurality of branch pipe units 21, during the process of layer-by-layer pouring of the roller-compacted concrete dam, the branch pipe units 21 can be installed and fixed one by one on each layer, which is convenient for the pouring and rolling construction of each layer of the dam body unit 11, and can effectively reduce the construction difficulty; at the same time, the branch pipe 2 is also convenient for transportation and installation construction.

[0036] According to some embodiments of the present application, the branch pipe 2 is configured to be at least two, one of which is configured as a first branch pipe, and the first branch pipe 2 is arranged close to the upstream surface of the dam body 1 of the roller-compacted concrete dam; one is configured as a second branch pipe, and the second branch pipe is arranged close to the downstream surface of the dam body 1 of the roller-compacted concrete dam. It should be noted that in addition to bearing the load brought by ground motion, the upstream surface also directly bears the pressure generated by water vibration and impact. The dam body 1 near the upstream surface will generate relatively large tensile stress due to the water pressure, which is likely to cause cracks and threaten the impermeability and structural safety of the dam body 1; in this embodiment, by arranging the first branch pipe close to the upstream surface and setting the prestressed steel bars 3, the tensile stress caused by the water pressure can be actively offset, and the development of cracks can be inhibited. The downstream surface is affected by loads such as earthquakes, temperature changes, self-weight, and foundation deformation, and may generate tensile stress due to shrinkage, expansion, or uneven stress; in this embodiment, by arranging the second branch pipe and the prestressed steel bars 3 close to the downstream surface, the tensile stress can be balanced and cracks can be avoided. As Figure 1 shown, in this embodiment, the prestressed steel bars 3 are arranged at the dam body 1 near the upstream surface and the downstream surface, which can accurately cover the maximum tensile stress area, form a precompression stress field in the dam body 1, effectively inhibit the initiation of cracks, and ensure the stability and durability of the roller-compacted concrete dam during long-term operation. In addition, arranging close to the upstream surface and the downstream surface is also convenient for later monitoring and maintenance.

[0037] According to some embodiments of the present application, the first branch pipe extends along the height direction. As Figure 1 shown, in this embodiment, the roller compacted concrete is constructed by layering in the height direction, and the interface between layers is a weak link in terms of tensile and shear resistance. The first branch pipe 2 of this embodiment extends along the height direction, so that the prestressed steel bars 3 are tensioned along the height direction, which can apply vertical compressive stress to the interface between layers, enhance the interfacial bonding force, prevent sliding or cracking along the layer surface, and improve the anti-seepage capacity of the dam body 1; moreover, the pre-applied prestress offsets the tensile stress in the height direction generated by external loads such as water pressure, improving the seismic performance; in addition, the prestressed steel bars 3 tensioned vertically along the height direction can form a "skeleton" penetrating the dam body 1, restricting the deformation of the dam body 1 under complex loads such as earthquakes and temperature changes, and enhancing the integrity, seismic resistance and anti-overturning capacity.

[0038] According to some embodiments of the present application, a slope is formed on the downstream surface of the roller compacted concrete dam body 1, and at least a part of the second branch pipe extends parallel to the slope. As Figure 1 shown, in this embodiment, the downstream surface of the dam body 1 is affected by dynamic loads such as earthquakes and flood discharges, or by factors such as the bending of the dam body 1 or the deformation of the foundation, and tensile stress along the slope will be generated. A part of the second branch pipe of this embodiment is arranged parallel to the slope, so that the prestressed steel bars 3 arranged in the second branch pipe can generate prestress along the slope near the downstream slope of the roller compacted concrete dam body 1, offsetting the tensile stress generated by external loads, enhancing the overall stiffness of the slope surface, improving the seismic effect, reducing the vibration amplitude, and avoiding damage to the surface of the dam body 1 or the expansion of cracks.

[0039] Furthermore, as Figure 1 shown, a part of the downstream surface of the roller compacted concrete dam body 1 extends along the height direction, so there is a bend on the downstream surface, and cracks and other damages are likely to occur. In some embodiments, a part of the second branch pipe extends correspondingly along the height direction, and there is a bend in a part of the second branch pipe, and the bent part is correspondingly arranged at the bend of the downstream surface, which can effectively prevent cracks and other damages from occurring at the bend of the downstream surface and improve the seismic effect of the dam body 1 near the downstream surface.

[0040] As Figures 2 - 5As shown, according to some embodiments of the present application, one end of each branch pipe unit 21 is formed with an internal thread 201, and the other end is formed with an external thread 202. Two adjacent branch pipe units 21 are connected by the cooperation of the internal thread 201 and the external thread 202. In this embodiment, two adjacent branch pipe units 21 can be connected to each other through the internal thread 201 and the external thread 202, so as to form a through branch pipe 2 in the entire roller compacted concrete dam body 1; the threaded connection method is easy to operate, can improve the construction efficiency, and has a stable connection, can evenly transfer prestress, and avoid stress concentration or local deformation. In some embodiments, a fastener is further provided at the connection of two adjacent branch pipe units 21 to ensure the reliability of the threaded connection and avoid loosening due to seismic vibration. The fastener can be a thread glue provided between the internal thread 201 and the external thread 202, or a connecting member connecting two adjacent branch pipe units 21, etc.

[0041] As Figure 3 As shown, according to some embodiments of the present application, the top anchor 4 is formed with a grouting hole 401 communicating with the installation hole 203, and the grouting hole 401 and the installation hole 203 are filled with slurry to be suitable for the fixed connection of the prestressed steel bar 3 and the branch pipe 2. In this embodiment, by providing the grouting hole 401 and combining the gap in the installation hole 203 to form a grouting channel, pouring concrete into the grouting channel can combine the roller compacted concrete dam body 1 and the prestressed steel bar 3 into a three-dimensional composite stress system, realizing the collaborative strengthening of the structural seismic performance.

[0042] According to some embodiments of the present application, a plurality of prestressed steel bars 3 are configured, and the plurality of prestressed steel bars 3 are connected by the top anchor 4 and the bottom anchor 5. In this embodiment, by providing a plurality of prestressed steel bars 3, the prestress effect can be improved, the load of a single prestressed steel bar 3 can be dispersed, and at the same time, redundancy is provided for the prestress application of the roller compacted concrete dam, avoiding the sudden failure of a single prestressed steel bar 3, ensuring the seismic performance of the roller compacted concrete dam, and improving the safety and durability of the roller compacted concrete dam.

[0043] According to some embodiments of the present application, a plurality of branch pipes 2 are configured to be arranged at intervals along the width direction of the roller compacted concrete dam body 1. In this embodiment, by arranging a plurality of branch pipes 2 in the width direction of the roller compacted concrete dam body 1, that is, arranging multiple groups of prestressed steel bars 3, the uniformity of the prestress applied to the roller compacted concrete dam body 1 can be increased, and the seismic performance of the roller compacted concrete dam can be improved. Further, a plurality of branch pipes 2 can be arranged in the roller compacted concrete dam body 1 along the discharge direction to install multiple groups of prestressed steel bars 3, further improving the seismic performance of the roller compacted concrete dam.

[0044] The present application also proposes a construction method for the above-mentioned roller compacted concrete dam, and the construction method includes the following steps:

[0045] S1. Build a grouting formwork at the preset position of the roller compacted concrete dam, install the branch pipe unit 21 inside the grouting formwork. After the branch pipe unit 21 is installed in place, pour concrete and compact it by rolling to form the dam body unit 11 with the embedded branch pipe unit 21 at the bottom layer of the roller compacted concrete dam;

[0046] S2. Repeat the above steps for layer-by-layer construction to form the roller compacted concrete dam body 1 with embedded branch pipes 2. During construction, after the concrete of the lower layer begins to set, accurately align and connect the external thread 202 of the upper layer branch pipe unit 21 with the internal thread 201 of the already installed lower layer branch pipe unit 21. The branch pipe units 21 are installed in multiple levels in accordance with the designed quantity. For each completed installation of a layer of branch pipe units 21, perform the concrete pouring and rolling operations for the corresponding layer to form the dam body unit 11 of this layer. After the installation of the topmost layer of branch pipe units 21 is completed, pour to form the top layer dam body unit 11, that is, complete the final pouring and dense forming of the roller compacted concrete dam body 1. Among them, the roller compacted concrete dam body 1 is composed of multiple dam body units 11, the branch pipe 2 is composed of multiple connected branch pipe units 21, and an installation duct 203 is formed inside the branch pipe 2;

[0047] S3. After the concrete of the dam body 1 reaches the designed strength, insert prestressed steel bars 3 into the installation duct 203;

[0048] S4. Install the top anchor 4 and the bottom anchor 5 at both ends of the prestressed steel bar 3 respectively, and tension the prestressed steel bar 3. When the tension value reaches the designed pre-compression stress control value, stop loading and carry out anchoring and locking. Among them, the top anchor 4 is provided with a grouting hole 401;

[0049] S5. Implement pressure grouting through the grouting hole 401 provided in the top anchor 4, inject the high-performance cement-based grouting material into the installation duct 203 where the prestressed steel bar 3 is installed. After the grouting material reaches the designed strength, form a three-dimensional composite stress system composed of the prestressed steel bar 3, the branch pipe 2 and the roller compacted concrete dam body 1, and form a roller compacted concrete dam to achieve the collaborative strengthening of the structural seismic performance.

[0050] According to the construction method of the present application, by presetting the installation duct 203 for the prestressed steel bar 3 during the construction process of the roller compacted concrete dam, the high-cost operation of traditional post-drilling is avoided, the construction cost is significantly reduced. At the same time, the installation of the prestressed steel bar 3 and the pouring of concrete can be carried out synchronously, eliminating the cumbersome procedures and waiting time of post-drilling in the later stage, thus greatly improving the construction efficiency, shortening the construction period, and enabling the project to be put into use faster.

[0051] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0052] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0053] In the description of the present application, the meaning of "a plurality of" is two or more.

[0054] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0055] In the description of the present application, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0057] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A roller compacted concrete dam based on prestressed earthquake resistance, characterized in that, Comprising: A roller compacted concrete dam body, which includes a plurality of dam body units formed by layered casting in the height direction; A branch pipe, which is embedded in the roller compacted concrete dam body during the casting construction of the roller compacted concrete dam body, and an installation duct is formed inside the branch pipe; A prestressed steel bar, which penetrates through the installation duct, with one end protruding from the top surface of the roller compacted concrete dam body and the other end protruding from the bottom surface of the roller compacted concrete dam body; A top anchor and a bottom anchor, which are respectively connected to both ends of the prestressed steel bar to be suitable for prestressing and anchoring the prestressed steel bar.

2. The roller compacted concrete dam based on prestressed earthquake resistance according to claim 1, wherein, The branch pipe includes a plurality of branch pipe units, each branch pipe unit is embedded in one dam body unit, and two adjacent branch pipe units in the height direction are connected end to end.

3. The roller compacted concrete dam based on prestress for earthquake resistance according to claim 1, characterized in that, The branch pipe is configured as at least two, one is configured as a first branch pipe, and the first branch pipe is arranged close to the upstream surface of the roller compacted concrete dam body; one is configured as a second branch pipe, and the second branch pipe is arranged close to the downstream surface of the roller compacted concrete dam body.

4. The roller compacted concrete dam based on prestress for earthquake resistance according to claim 3, characterized in that, The first branch pipe extends along the height direction.

5. The roller-compacted concrete dam based on prestress for earthquake resistance according to claim 3, wherein A slope is formed on the downstream surface of the roller compacted concrete dam body, and at least a part of the second branch pipe extends parallel to the slope.

6. The roller compacted concrete dam based on prestress for earthquake resistance according to claim 2, characterized in that, One end of each branch pipe unit is formed with an internal thread, and the other end is formed with an external thread, and two adjacent branch pipe units are connected by the cooperation of the internal thread and the external thread.

7. The roller compacted concrete dam based on prestress for earthquake resistance according to claim 1, characterized in that, The top anchor is formed with a grouting hole communicating with the installation duct, and the installation duct and the grouting hole are filled with slurry to be suitable for the fixed connection between the prestressed steel bar and the branch pipe.

8. The roller compacted concrete dam based on prestress for earthquake resistance according to claim 1, characterized in that, The prestressed steel bars are configured as a plurality, and the plurality of prestressed steel bars are connected by the top anchor and the bottom anchor.

9. The roller compacted concrete dam based on prestress for earthquake resistance according to claim 1, wherein The branch pipes are configured as a plurality arranged at intervals in the width direction of the roller compacted concrete dam body.

10. A construction method for a roller compacted concrete dam, characterized in that, Including the following steps: Build a grouting formwork at a preset position of the roller compacted concrete dam, install a branch pipe unit in the grouting formwork, pour concrete and compact it by rolling to form a dam body unit embedded with the branch pipe unit; Repeat the above steps for layer-by-layer construction to form a roller compacted concrete dam body embedded with branch pipes; wherein, the roller compacted concrete dam body is composed of multiple layers of the dam body units, the branch pipe is composed of multiple layers of the branch pipe units connected, and an installation duct is formed inside the branch pipe; Thread a prestressed steel bar through the installation duct; Install anchors at both ends of the prestressed steel bar, and tension the prestressed steel bar, and anchor and lock it after reaching the target preset stress; Grout into the installation duct, and the slurry solidifies to form the roller compacted concrete dam.

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