A concrete tower structure for a tower type photo-thermal power station and a construction method thereof

Abstract

The application belongs to the technical field of photo-thermal power generation, and relates to a concrete tower cylinder structure for a tower type photo-thermal power station and a construction method thereof. The prestressed cable is arranged on the concrete tower cylinder and is unevenly arranged on the cross section, so that the prestress applied by the prestressed cable to the concrete tower cylinder is unevenly distributed in the circumferential direction of the cross section, thereby forming a restraint bending moment opposite to the bending direction of the tower cylinder caused by the sunshine temperature difference. The restraint bending moment can actively offset the bending effect caused by the sunshine temperature difference, inhibit the displacement of the tower top, and solve the technical problem that the reflected light of the heliostat deviates from the heat absorber due to the position deviation of the heat absorber on the tower top, and the heat collection efficiency is reduced.

Description

Technical Field

[0001] This invention belongs to the field of concentrated solar power (CSP) technology and relates to a concrete tower structure for tower CSP plants and its construction method. Background Technology

[0002] Tower solar thermal power plants are a type of renewable energy power plant with sustainable power generation capabilities. Due to their stable power output, they have become a widely promoted form of power generation with broad development prospects. The heat-absorbing tower is the most important component of the solar thermal power plant's collector field, as it absorbs solar energy and converts it into thermal energy, providing the heat source for the entire power plant.

[0003] The heat-absorbing tower is typically located at the center of the heat collection field, with a steel structure tower on top and a concrete tower cylinder below, reaching an overall height of approximately 230 meters. The absorber is located at the top of the tower and is used to absorb reflected light from the ground-based heliostat. Under sunlight, the heat-absorbing tower experiences a temperature difference between its sun-facing and shaded sides, causing the tower to bend. Because the heliostat is relatively far from the absorber, changes in the absorber's position at the top of the tower can cause the reflected light from the heliostat to deviate from the absorber, resulting in a decrease in heat collection efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete tower structure and its construction method for a tower-type solar thermal power plant, in order to solve the technical problem that the heat absorption tower bends and deforms due to temperature difference under uneven sunlight, causing the position of the heat absorber at the top of the tower to shift, which in turn causes the heliostat to deviate from the heat absorber and results in a significant decrease in heat collection efficiency.

[0005] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, the present invention provides a concrete tower structure for a tower-type solar thermal power plant, comprising: Concrete tower; and Prestressed cables connect the top and bottom of the concrete tower, and the prestressed cables are unevenly arranged on the cross-section of the concrete tower so that the prestress applied by the prestressed cables to the concrete tower is unevenly distributed in the circumferential direction of the cross-section, forming a constraint bending moment opposite to the tower bending direction caused by the temperature difference caused by sunlight.

[0006] Furthermore, the uneven arrangement of the prestressing cables specifically means that the prestressing cables are only arranged on the sun-facing side of the concrete tower, and no prestressing cables are arranged on the shaded side of the concrete tower.

[0007] Furthermore, the uneven arrangement of the prestressing cables specifically means that the prestressing cables are arranged along the entire circumference of the concrete tower, and the total prestress value of the prestressing cables located on the sunny side is greater than the total prestress value of the prestressing cables located on the shady side.

[0008] Furthermore, the top of the concrete tower is provided with a top cantilever of the heat absorption tower, and the bottom of the concrete tower is provided with a bottom cantilever of the heat absorption tower. The top cantilever of the heat absorption tower and the bottom cantilever of the heat absorption tower are located on the same side of the concrete tower. The top cantilever of the heat absorption tower is provided with several top anchoring nodes, and the top end of the prestressed cable is anchored to the top of the concrete tower cylinder through the top anchoring nodes; the bottom cantilever of the heat absorption tower is provided with several bottom anchoring nodes, and the bottom end of the prestressed cable is anchored to the bottom of the concrete tower cylinder through the bottom anchoring nodes. The top anchorage node and the bottom anchorage node, which are respectively connected at both ends of the same prestressed cable, are located in the same cross section, which passes through the central axis of the concrete tower. The top anchorage node and the bottom anchorage node are located on the same side of the central axis of the concrete tower.

[0009] Furthermore, both the top overhang and the bottom overhang of the heat absorption tower are annular structures.

[0010] Furthermore, a heat-absorbing tower bottom cantilever is provided at the bottom of the inner side of the concrete tower, and several bottom anchoring nodes are provided on the bottom cantilever of the heat-absorbing tower. A prestressed cable zigzag guide rail is provided inside the concrete tower, and a top anchoring node is also provided on the concrete tower. The prestressed cable is turned by the prestressed cable zigzag guide rail and then connected to the top anchoring node and the bottom anchoring node. The top anchoring node, the bottom anchoring node and the prestressed cable zigzag guide rail connected by the same prestressed cable are located at the same cross section, which passes through the central axis of the concrete tower. The bottom anchoring node and the prestressed cable zigzag guide rail are located on the same side of the central axis of the concrete tower, and the top anchoring node and the bottom anchoring node are located on opposite sides of the central axis of the concrete tower.

[0011] Furthermore, prestressed cable channels are provided at the top anchoring node and / or the bottom anchoring node, and locally reinforcing spiral ribs are provided around the ends of the prestressed cable channels to strengthen the end area of ​​the prestressed cable channels; after the end of the prestressed cable passes through the prestressed cable channels, an anchor plate is fixedly connected to it, and the anchor plate is located at the end of the prestressed cable channels.

[0012] Furthermore, the prestressed cable ducts are filled with micro-expansion cement-based grout.

[0013] Furthermore, the concrete tower includes a concrete cylinder wall, vertical ordinary steel bars and circumferential ordinary steel bars disposed inside the concrete cylinder wall, and the prestressed cable, the vertical ordinary steel bars, the circumferential ordinary steel bars and the concrete cylinder wall together bear the external load.

[0014] Secondly, the present invention provides a construction method for a concrete tower structure of a tower-type solar thermal power plant, comprising the following steps: Casting concrete tower casing; The top and bottom of the concrete tower are connected by the prestressed cables, and the prestressed cables are tensioned simultaneously at both ends using the post-tensioning method.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention addresses the technical problem of reduced heat collection efficiency caused by the deviation of the heliostat reflected light from the receiver due to the offset of the receiver position. By installing prestressed cables on a concrete tower and distributing them unevenly across the cross-section, the prestress applied by the prestressed cables to the concrete tower is non-uniformly distributed in the circumferential direction of the cross-section. This creates a constraint bending moment that is opposite to the bending direction of the tower caused by the temperature difference caused by solar radiation. This constraint bending moment can actively counteract the bending effect caused by the temperature difference caused by solar radiation, suppress the displacement of the tower top, and solve the technical problem of reduced heat collection efficiency caused by the offset of the receiver position at the top of the tower.

[0016] This invention, through the steps of first pouring concrete into the tower and then simultaneously tensioning the prestressed cables at both ends using the post-tensioning method, ensures that the prestress is uniformly transmitted along the cable length, avoids the problem of uneven prestress loss caused by single-end tensioning, and ensures that the prestressed cables form the expected non-uniform prestress distribution on the cross-section of the tower. Thus, during the tower construction stage, a constraint bending moment opposite to the tower bending direction caused by the temperature difference caused by sunlight is established. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the prestressed cable arrangement structure on one side of the heat absorption tower of the present invention; Figure 2 This is a cross-sectional view of the unevenly arranged prestressed cable structure of the heat absorption tower of the present invention; Figure 3 This is a schematic diagram of the same-side anchorage at the top of the prestressed cable according to the present invention; Figure 4 This is a schematic diagram of the prestressed cable top-side anchorage of the present invention; Figure 5 This is a schematic diagram of the prestressed cable bottom anchorage method of the present invention; Figure 6 This is a detailed diagram of the arrangement of the prestressed cable anchor plate of the present invention; Figure 7 This is a flowchart of the method of the present invention.

[0018] Among them: 100, concrete tower cylinder; 101, sunny side; 102, shady side; 110, concrete cylinder wall; 120, vertical ordinary steel reinforcement; 130, circumferential ordinary steel reinforcement; 150, top cantilever of the heat absorption tower; 160, bottom cantilever of the heat absorption tower; 170, prestressed cable duct; 200, prestressed cable; 300, top anchoring node; 400, bottom anchoring node; 500, prestressed cable zigzag guide rail; 600, anchor plate; 700, locally reinforced spiral reinforcement; 800, maintenance platform. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1: See Figure 1 The present invention provides a concrete tower structure for a tower-type solar thermal power plant, including a concrete tower 100 and prestressed cables 200 disposed inside the concrete tower 100.

[0022] The concrete tower 100 serves as the lower support structure for the absorber tower of a tower-type solar thermal power plant. It is cylindrical or conical in shape and can reach a height of approximately 230m. The concrete tower 100 includes a concrete wall 110 and vertical and circumferential reinforcing bars 120 and 130 arranged inside the wall. The vertical reinforcing bars 120 are arranged along the height of the tower 100 and primarily bear vertical loads; the circumferential reinforcing bars 130 are arranged along the circumference of the tower 100 and primarily bear circumferential stress and constrain lateral deformation of the concrete. The prestressed cables 200, together with the vertical and circumferential reinforcing bars 120 and 130 and the concrete wall 110, jointly bear external loads (including gravity loads, wind loads, seismic loads, and temperature loads), forming a complete structural load-bearing system.

[0023] The prestressed cables 200 connect the top and bottom of the concrete tower 100 and can be steel strands or high-strength steel wire bundles, and are installed inside the concrete tower 100 (i.e., within the pre-reserved ducts inside the concrete cylinder wall 110). The prestressed cables 200 are unevenly distributed on the cross-section of the concrete tower 100 so that the prestress applied by the prestressed cables 200 to the concrete tower 100 is unevenly distributed in the circumferential direction of the cross-section, forming a restraining bending moment opposite to the bending direction of the tower caused by the temperature difference caused by solar radiation.

[0024] In this embodiment of the invention, a maintenance platform 800 is provided on the concrete tower 100.

[0025] Its working principle is as follows: During the operation of the tower solar thermal power plant, under the influence of sunlight, the temperature on the sun-facing side 101 of the absorber tower is significantly higher than that on the shaded side 102, creating a temperature difference. This causes the concrete on the sun-facing side 101 to expand more than that on the shaded side 102, resulting in the entire tower bending towards the shaded side 102. Consequently, the absorber at the top of the tower undergoes a horizontal displacement towards the shaded side 102. Due to the considerable distance between the heliostat and the absorber, even a small displacement at the top of the tower will cause a large amount of reflected light to deviate from the light-receiving surface of the absorber. This invention addresses this by unevenly arranging prestressed cables 200 on the cross-section of the tower, resulting in a non-uniform distribution of prestress in the circumferential direction of the cross-section. Specifically, the prestress on the sun-facing side 101 is greater than that on the shaded side 102, thereby forming a constraint bending moment on the cross-section of the tower towards the sun-facing side 101. The direction of this constraint bending moment is opposite to the bending direction on the shaded side caused by the temperature difference caused by sunlight, thus actively counteracting the temperature bending effect and suppressing the displacement at the top of the tower.

[0026] See Figure 1In this embodiment, the non-uniform arrangement of the prestressing cables 200 is specifically as follows: the prestressing cables 200 are only arranged on the sun-facing side 101 of the concrete tower 100, while no prestressing cables 200 are arranged on the shaded side 102 of the concrete tower 100. In this scheme, the prestressing cables 200 are concentrated in the wall of the sun-facing side 101, so that the wall of the sun-facing side 101 bears a large prestress, while the shaded side 102 does not bear prestress. The prestress forms a significant non-uniform distribution in the circumferential direction of the cross-section, thereby generating a restraining bending moment to resist the back bending of the tower. This scheme has a simple structure, uses fewer prestressing cables, and is convenient to construct. It is suitable for working conditions where the temperature difference between the sun-facing and shaded sides is significant and the direction of the temperature difference is stable.

[0027] See Figure 3 This embodiment provides a specific anchoring method for the prestressed cable 200. A top cantilever 150 for the heat-absorbing tower is provided at the top of the concrete tower 100, and a bottom cantilever 160 for the heat-absorbing tower is provided at the bottom of the concrete tower 100. The top cantilever 150 and the bottom cantilever 160 are located on the same side of the concrete tower 100. It should be noted that the top cantilever 150 and the bottom cantilever 160 extend from the tower wall towards the inside or outside of the tower. The top cantilever 150 and the bottom cantilever 160 are simultaneously located on the inner side of the concrete tower 100 wall or simultaneously on the outer side of the concrete tower 100 wall. See [reference needed]. Figure 1 and Figure 2 This diagram shows the state where the prestressed cable 200 is located inside the wall of the concrete tower 100. In this position, both the top cantilever 150 and the bottom cantilever 160 of the heat-absorbing tower are located inside the wall of the concrete tower 100. See also... Figure 6 This is a diagram showing the top cantilever 150 and the bottom cantilever 160 of the heat absorption tower located outside the wall of the concrete tower cylinder 100.

[0028] The top cantilever 150 of the heat absorption tower is provided with several top anchoring nodes 300, and the top end of the prestressed cable 200 is anchored to the top of the concrete tower cylinder 100 through the top anchoring nodes 300; the bottom cantilever 160 of the heat absorption tower is provided with several bottom anchoring nodes 400, and the bottom end of the prestressed cable 200 is anchored to the bottom of the concrete tower cylinder 100 through the bottom anchoring nodes 400.

[0029] The top anchorage node 300 and the bottom anchorage node 400, which are connected to the two ends of the same prestressed cable 200, are located in the same cross section. This cross section passes through the central axis of the concrete tower 100, and the top anchorage node 300 and the bottom anchorage node 400 are located on the same side of the central axis of the concrete tower 100.

[0030] In this embodiment, the prestressed cable 200 is vertically arranged along the same side wall of the concrete tower 100, extending vertically upward from the bottom anchoring node 400 to the top anchoring node 300. The top cantilever 150 and bottom cantilever 160 of the heat-absorbing tower are both annular structures, respectively encircling the top and bottom outer walls of the concrete tower 100, providing installation platforms for the anchoring nodes. This anchoring method has a simple structure, uniformly transmits prestress along the height of the tower, and is convenient to construct.

[0031] Prestressed cable channels 170 are provided at the top anchoring node 300 and / or the bottom anchoring node 400 for threading prestressed cables 200. Locally reinforcing spiral ribs 700 are provided around the ends of the prestressed cable channels 170 to reinforce the end region of the channels. An anchor plate 600 is fixedly connected to the end of the prestressed cable 200 after passing through the channels 170. The anchor plate 600 is located at the end of the channels 170. The anchor plate 600 is a rigid plate, and its size is larger than the diameter of the prestressed cable channels 170, thereby dispersing the tension of the prestressed cable 200 to the locally reinforcing spiral ribs 700 and the surrounding concrete, avoiding local crushing damage caused by prestress concentration.

[0032] The prestressed cable ducts 170 are filled with micro-expansion cement-based grout. During the hardening process, the micro-expansion cement-based grout exhibits micro-expansion characteristics, effectively filling all gaps between the anchoring nodes and the spiral reinforcement, ensuring the continuity and reliability of prestress transfer, and also providing corrosion protection.

[0033] In the aforementioned local reinforcement structure, the local reinforcement spiral bar 700 is fixedly connected to the anchor plate 600 (which can be connected by welding or binding). Together, they form a local reinforcement system in the anchorage area, which significantly improves the load-bearing capacity and fatigue performance of the anchorage node.

[0034] Example 2: See Figure 2This embodiment discloses a concrete tower structure for a tower-type solar thermal power plant. Unlike Embodiment 1, the non-uniform arrangement of the prestressed cables 200 in this embodiment is as follows: the prestressed cables 200 are arranged along the entire circumference of the concrete tower 100, and the total prestress value of the prestressed cables 200 located on the sun-facing side 101 is greater than the total prestress value of the prestressed cables 200 located on the shaded side 102. In this scheme, the prestressed cables 200 are distributed throughout the entire circumference of the tower, but the prestressing tension values ​​are different in different areas—the prestressed cables 200 on the sun-facing side 101 are subjected to a larger tension force, while the prestressed cables 200 on the shaded side 102 are subjected to a smaller tension force, thus forming a non-uniform prestress distribution in the circumferential direction of the cross-section, which also generates a constraint bending moment to resist tower bending. This scheme can improve the overall load-bearing capacity and crack resistance of the tower cross-section while forming a constraint bending moment to resist bending, and is suitable for working conditions with higher requirements for structural integrity or where the direction of sunlight may change.

[0035] Example 3: See Figure 4 This embodiment discloses a concrete tower structure for a tower-type solar thermal power plant. Unlike embodiment 1, this embodiment provides another specific anchoring method for the prestressed cable 200, which is suitable for working conditions where the anchoring space at the top and bottom of the heat absorption tower is limited.

[0036] A heat-absorbing tower bottom cantilever 160 is provided at the bottom of the inner side of the concrete tower 100. Several bottom anchoring nodes 400 are provided on the heat-absorbing tower bottom cantilever 160. A prestressed cable zigzag guide rail 500 is provided inside the concrete tower 100, and a top anchoring node 300 is also provided on the concrete tower 100. The prestressed cable 200 is connected to the top anchoring node 300 and the bottom anchoring node 400 after being turned by the prestressed cable zigzag guide rail 500.

[0037] The top anchorage node 300 and the bottom anchorage node 400 connected by the same prestressed cable 200 are located at the same cross section as the prestressed cable zigzag guide rail 500, which passes through the central axis of the concrete tower 100. The bottom anchorage node 400 and the prestressed cable zigzag guide rail 500 are located on the same side of the central axis of the concrete tower 100, while the top anchorage node 300 and the bottom anchorage node 400 are located on opposite sides of the central axis of the concrete tower 100.

[0038] In this embodiment, the prestressed cable 200 is arranged in a zigzag shape inside the tower. Specifically, the bottom end of the prestressed cable 200 is anchored to the bottom anchoring node 400 on the bottom cantilever 160 of the heat absorption tower, and then extends obliquely upward to the prestressed cable zigzag guide rail 500. After turning at the prestressed cable zigzag guide rail 500, it extends obliquely upward again to the top anchoring node 300 and is anchored there.

[0039] The advantages of this scheme are: the tension force of the prestressed cable 200 generates a horizontal component force at the turning point of the broken line, which can further enhance the restraint moment effect; at the same time, the top anchoring node 300 of the prestressed cable 200 can be arranged on the shaded side 102 of the tower (opposite to the side where the bottom anchoring node 400 is located), so that the top anchoring node 300 and the bottom anchoring node 400 can be set in a relatively stable position of their respective cantilever structures, making the anchoring node arrangement more flexible and allowing for optimization according to specific engineering conditions.

[0040] See Figure 5 In this embodiment, the prestressed cable zigzag guide rail 500 is fixed to the inner wall of the concrete tower 100 and arranged along the circumference of the tower. The prestressed cable zigzag guide rail 500 has an arc-shaped turning groove inside for the prestressed cable 200 to pass through. The radius of curvature of the turning groove meets the bending radius requirement of the prestressed cable 200, avoiding excessive bending stress on the prestressed cable 200 at the turning point.

[0041] Prestressed cable channels 170 are provided at the top anchoring node 300 and / or the bottom anchoring node 400. Locally reinforcing spiral ribs 700 are provided around the ends of the prestressed cable channels 170 to reinforce the end region of the prestressed cable channels 170. An anchor plate 600 is fixedly connected to the end of the prestressed cable 200 after passing through the prestressed cable channels 170. The anchor plate 600 is located at the end of the prestressed cable channels 170. The prestressed cable channels 170 are filled with micro-expansion cement-based grout.

[0042] Example 4: See Figure 7 The present invention also provides a construction method for a concrete tower structure for a tower-type solar thermal power plant, comprising the following steps: S1: Casting the concrete tower. This includes: tying vertical ordinary steel bars 120 and circumferential ordinary steel bars 130 to form a steel cage; erecting formwork and casting concrete; and removing the formwork after the concrete reaches the design strength to form the concrete tower 100. During the casting process, prestressed cable ducts 170 need to be accurately pre-embedded at the preset positions.

[0043] S2: The top and bottom of the concrete tower 100 are connected by prestressed cables 200. Tensioning equipment is used to simultaneously apply tension force to both ends of the prestressed cables 200, and anchoring is performed after tensioning to the design value. Simultaneous tensioning at both ends ensures that the prestress is uniformly transmitted along the cable length, avoiding the problem of uneven prestress loss caused by single-end tensioning, and ensuring that the unevenly arranged prestressed cables 200 form the expected non-uniform prestress distribution on the cross-section of the tower.

[0044] S3: Inject micro-expansion cement-based grout into the 170mm prestressed cable ducts.

[0045] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A concrete tower structure for a tower-type solar thermal power plant, characterized in that, include: Concrete tower (100); as well as Prestressed cables (200) connect the top and bottom of the concrete tower (100), and the prestressed cables (200) are unevenly arranged on the cross-section of the concrete tower (100) so that the prestress applied by the prestressed cables (200) to the concrete tower (100) is unevenly distributed in the circumferential direction of the cross-section, forming a constraint bending moment opposite to the tower bending direction caused by the solar radiation temperature difference.

2. The concrete tower structure for a tower-type solar thermal power plant according to claim 1, characterized in that, The uneven arrangement of the prestressed cable (200) is specifically as follows: the prestressed cable (200) is arranged only on the sun-facing side (101) of the concrete tower (100), and no prestressed cable (200) is arranged on the shaded side (102) of the concrete tower (100).

3. A concrete tower structure for a tower-type solar thermal power plant according to claim 1, characterized in that, The uneven arrangement of the prestressed cables (200) is specifically as follows: the prestressed cables (200) are arranged along the entire circumference of the concrete tower (100), and the total prestress value of the prestressed cables (200) located on the sunny side (101) is greater than the total prestress value of the prestressed cables (200) located on the shady side (102).

4. A concrete tower structure for a tower-type solar thermal power plant according to claim 1, characterized in that, The top of the concrete tower (100) is provided with a heat absorption tower top cantilever (150), and the bottom of the concrete tower (100) is provided with a heat absorption tower bottom cantilever (160). The heat absorption tower top cantilever (150) and the heat absorption tower bottom cantilever (160) are located on the same side of the concrete tower (100). The top cantilever (150) of the heat absorption tower is provided with several top anchoring nodes (300), and the top end of the prestressed cable (200) is anchored to the top of the concrete tower cylinder (100) through the top anchoring nodes (300); the bottom cantilever (160) of the heat absorption tower is provided with several bottom anchoring nodes (400), and the bottom end of the prestressed cable (200) is anchored to the bottom of the concrete tower cylinder (100) through the bottom anchoring nodes (400). The top anchorage node (300) and the bottom anchorage node (400) connected to the two ends of the same prestressed cable (200) are located in the same cross section, which passes through the central axis of the concrete tower (100). The top anchorage node (300) and the bottom anchorage node (400) are located on the same side of the central axis of the concrete tower (100).

5. A concrete tower structure for a tower-type solar thermal power plant according to claim 4, characterized in that, Both the top overhang (150) and the bottom overhang (160) of the heat absorption tower are annular structures.

6. A concrete tower structure for a tower-type solar thermal power plant according to claim 1, characterized in that, The bottom of the inner side of the concrete tower (100) is provided with a bottom cantilever (160) of the heat absorption tower. Several bottom anchoring nodes (400) are provided on the bottom cantilever (160). A prestressed cable zigzag guide rail (500) is provided inside the concrete tower (100). A top anchoring node (300) is also provided on the concrete tower (100). The prestressed cable (200) is turned through the prestressed cable zigzag guide rail (500) and then connected to the top anchoring node (300) and the bottom anchoring node (400). The top anchoring node (300), the bottom anchoring node (400), and the prestressed cable zigzag guide rail (500) connected by the prestressed cable (200) are located at the same cross section, which passes through the central axis of the concrete tower (100). The bottom anchoring node (400) and the prestressed cable zigzag guide rail (500) are located on the same side of the central axis of the concrete tower (100), and the top anchoring node (300) and the bottom anchoring node (400) are located on opposite sides of the central axis of the concrete tower (100).

7. A concrete tower structure for a tower-type solar thermal power plant according to claim 4 or 6, characterized in that, The top anchoring node (300) and / or the bottom anchoring node (400) are provided with prestressed cable channels (170), and the ends of the prestressed cable channels (170) are provided with locally reinforcing spiral ribs (700). The locally reinforcing spiral ribs (700) are arranged around the prestressed cable channels (170) to reinforce the end area of ​​the prestressed cable channels (170). The end of the prestressed cable (200) passes through the prestressed cable channels (170) and is fixedly connected to an anchor plate (600). The anchor plate (600) is located at the end of the prestressed cable channels (170).

8. A concrete tower structure for a tower-type solar thermal power plant according to claim 7, characterized in that, The prestressed cable ducts (170) are filled with micro-expansion cement-based grout.

9. A concrete tower structure for a tower-type solar thermal power plant according to claim 1, characterized in that, The concrete tower (100) includes a concrete cylinder wall (110), vertical ordinary steel bars (120) and circumferential ordinary steel bars (130) disposed inside the concrete cylinder wall (110). The prestressed cable (200), the vertical ordinary steel bars (120), the circumferential ordinary steel bars (130) and the concrete cylinder wall (110) jointly bear the external load.

10. A construction method for a concrete tower structure for a tower-type solar thermal power plant as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Cast concrete tower (100); The top and bottom of the concrete tower (100) are connected by the prestressed cable (200), and the prestressed cable (200) is tensioned simultaneously at both ends by post-tensioning.

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