Arch dam intelligent regulation and control assembly type heat preservation formwork and construction method

Abstract

The invention provides an arch dam intelligent regulation and control assembly type heat preservation formwork and a construction method.The heat preservation formwork structure is of a multi-layer structure and comprises a concrete heat preservation formwork layer located on the inner layer, and a buffer air cushion layer, a water heating layer, a drainage layer and a protective surface layer are sequentially arranged on the outer layer of the concrete heat preservation formwork layer; the protective surface layer is connected with the concrete heat preservation formwork layer through a fixing steel support, and the concrete heat preservation formwork layer is connected with the dam body through embedded bars penetrating through anchoring holes. Rapid concrete pouring is achieved, the internal and external temperature difference of arch dam concrete in the construction period and the operation period is reduced, the destructive effect of ice thrust and ice pulling force is reduced, the construction period is effectively shortened, concrete quality is guaranteed, and arch dam safety is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation technology for concrete arch dams in high-altitude and cold regions, specifically to an intelligent controllable prefabricated thermal insulation template for arch dams and its construction method. Background Technology

[0002] Intelligent control prefabricated multi-layer permanent insulation formwork simplifies formwork construction during the construction period, enabling rapid concrete pouring and shortening the construction cycle. Simultaneously, the use of permanent insulation measures reduces the temperature difference between the inside and outside of the concrete, ensuring the quality of the concrete pouring. By employing intelligent control and multi-layer structure measures, the damage to the permanent insulation structure caused by ice thrust and pull-out forces can be reduced during the operation period, ensuring that the temperature difference between the inside and outside of the concrete meets the specifications, preventing cracking of the arch dam, and ensuring the safety of the arch dam.

[0003] In high-altitude and cold regions, the construction of concrete arch dams using traditional thermal insulation formwork has a long construction period and cannot quickly complete concrete pouring, which is not conducive to shortening the construction time. At the same time, in adverse environments such as large temperature differences, the use of traditional temporary thermal insulation measures has problems such as untimely and poor insulation effect, which can easily cause large temperature differences between the inside and outside of the concrete, leading to concrete cracking.

[0004] During the operation of concrete arch dams in high-altitude and cold regions, the ice and snow cover on the upstream river surface is thick. Under the action of ice thrust and ice pull, the traditional insulation structure suffers from serious problems such as falling off, cracking, and water seepage, which greatly reduces the service life of the insulation structure and easily causes the temperature difference between the inside and outside of the concrete to exceed the specifications, resulting in concrete cracking and affecting the durability of the arch dam. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent controllable prefabricated thermal insulation template and construction method for arch dams, so as to solve the problems in the background technology, realize rapid concrete pouring, reduce the temperature difference between the inside and outside of the arch dam concrete during the construction and operation periods, reduce the destructive effects of ice thrust and ice pull-out forces, effectively shorten the construction cycle, ensure concrete quality, and ensure the safety of the arch dam.

[0006] To achieve the above-mentioned technical features, the present invention aims to provide an intelligent controllable prefabricated thermal insulation template for arch dams. The thermal insulation template structure adopts a multi-layer structure, including an inner concrete thermal insulation template layer, and an outer layer of the concrete thermal insulation template layer, which is sequentially provided with a buffer air cushion layer, a water heating layer, a drainage layer, and a protective surface layer. The protective surface layer is connected to the concrete thermal insulation template layer by a fixed steel support, and the concrete thermal insulation template layer is connected to the dam body by pre-embedded bars that penetrate anchor holes.

[0007] Preferably, the back face of the concrete insulation formwork layer is provided with a concrete triangular support system and horizontal anchoring steel bars; the outer surface of the concrete insulation formwork layer is provided with a waterproof layer, an insulation layer and a fixed steel support; the concrete triangular support system consists of two parts: a triangular bracket and a horizontal plate, and the triangular bracket and the horizontal plate are provided with through anchoring holes at positions horizontal to the dam body.

[0008] Preferably, the buffer air cushion layer is arranged between the concrete insulation template layer and the water heating layer, and is equipped with a temperature sensor and an air pressure control device. The temperature sensor is set on the outer surface of the protective layer, and the temperature sensor and the air pressure control device are connected to the intelligent control system through a transmission line.

[0009] Preferably, the water heating layer is located on the inner surface of the protective layer and is composed of multiple circular tubes. It is equipped with a dual control device for water flow and temperature and an ice thickness sensor. The ice thickness sensor is located on the outer surface of the protective layer. The dual control device for water flow and temperature and the ice thickness sensor are connected to the intelligent control system through a transmission line.

[0010] Preferably, the drainage layer is provided with a horizontal drainage pipe, a water level sensor and a drainage control device, wherein the horizontal drainage pipe is located in a water collection tank at the bottom of the protective surface layer, the water level sensor is installed in the water collection tank, and the water level sensor and the drainage control device are connected to the intelligent control system through a transmission line.

[0011] Preferably, the protective surface layer is made of stainless steel and is divided into two types: edge-sealed protective panel and standard protective panel; both types of protective panels are provided with double U-shaped waterproof grooves around the perimeter; a fixed support system is provided on the back of the protective surface layer, and the fixed support system is connected to the fixed steel support through pins; a polyurethane insulation layer and a stainless steel protective layer are added to the outer side, top and bottom of the edge-sealed protective panel.

[0012] Preferably, the protective surface layer joint is provided with an I-shaped waterstop, which is placed inside the double U-shaped waterproof groove, and horizontal and vertical grouting pipes are provided in the gap between the double U-shaped waterproof groove and the I-shaped waterstop.

[0013] Another aspect of the present invention provides a construction method for an intelligent controllable prefabricated thermal insulation formwork for arch dams, comprising the following steps: S1, Pre-construction preparation: Check the flatness of the dam surface anchorage. S2, Install a buffer air cushion layer on the outer surface of the concrete insulation formwork layer, and lay out transmission lines and vertical drainage pipes. S3, Install the concrete formwork structure and anchor the concrete triangular support system; S4, pouring concrete structure for the dam; S5, install a water heating layer on the inner surface of the protective layer, and lay transmission lines and horizontal drainage pipes; S6, Install the protective surface layer; S7 is equipped with a temperature sensor, ice thickness sensor, water level sensor, air pressure control device, water flow and temperature dual control device, and drainage control device. S8, Install I-shaped waterstop and lay out grouting pipes; S9, carry out grouting construction of the I-shaped waterstop; S10, install polyurethane insulation and stainless steel protective layer on the outer edge, bottom and top of the edge-sealing protective panel.

[0014] Preferably, the protective surface layer should be installed after the dam concrete has reached the design strength; Grouting of the I-shaped waterstop should be carried out after the protective surface layer is installed and the internal buffer air cushion layer, water heating layer, drainage layer and intelligent control system have passed the network trial operation and acceptance.

[0015] Preferably, the construction of the polyurethane insulation layer and stainless steel protective layer on the outer edge, bottom, and bottom of the edge sealing and protective panel should be carried out after the grouting strength in S9 reaches the design requirements and the construction quality of the waterstop is accepted. The gap between the stainless steel protective layer and the concrete of the arch dam needs to be filled with asphalt for sealing.

[0016] The present invention has the following beneficial effects: 1. This invention adopts a prefabricated multi-layer permanent insulation formwork, which can optimize the traditional formwork construction process, shorten the on-site formwork construction cycle, avoid the concrete cracking problem caused by the untimely and poor effect of traditional temporary insulation measures, and ensure the quality of arch dam concrete.

[0017] 2. This invention uses a buffer air cushion layer and a stainless steel protective surface layer, which can reduce the damage to the insulation layer caused by the ice thrust and ice pull-out force upstream of the arch dam during the freezing period, ensure that the temperature difference between the inside and outside of the concrete meets the specifications, avoid cracking of the arch dam, and ensure the safety of the arch dam.

[0018] 3. By connecting the buffer air cushion layer with a temperature sensor and an air pressure control device into an intelligent control system, the present invention can automatically pressurize the air cushion layer when the temperature drops below zero, forming a flexible buffer layer, reducing the deformation of the protective surface layer, and reducing the damaging effect of ice thrust on the internal insulation layer and the protective surface layer.

[0019] 4. This invention integrates the water heating layer with an ice thickness sensor and a dual control device for water flow and temperature into an intelligent control system. When the ice layer thickness exceeds the control value, it can automatically circulate hot water to heat the protective surface layer, melt the ice layer on the surface of the protective surface layer, and reduce the damage to the protective surface layer caused by ice pulling force.

[0020] 5. This invention uses an I-shaped waterstop, which can achieve double-layer waterproofing and improve the seepage prevention effect.

[0021] 6. The present invention uses a polyurethane insulation layer and a stainless steel protective layer on the outer edge, bottom and top of the edge sealing and protection panel, which can reduce the damage of adverse factors such as temperature and snow to the I-shaped waterstop around the arch dam protection surface.

[0022] 7. This invention connects the drainage layer, water level sensor, and drainage control device to an intelligent control system. When the cumulative seepage depth in the water collection tank at the bottom of the protective surface layer reaches the control value, it can automatically drain water to the outside, ensuring that the internal structure and facilities of the protective surface layer are not damaged by water. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0025] Figure 2 For the present invention Figure 1 AA view.

[0026] Figure 3 This is the three-dimensional model of the present invention.

[0027] Figure 4 This is a cross-sectional view of the edge sealing and protection panel of the present invention.

[0028] Figure 5 This is a cross-sectional view of the standard protective panel of the present invention.

[0029] Figure 6 For the present invention Figure 4 3D diagram of the I-shaped waterproof strip at node B.

[0030] Figure 7 For the present invention Figure 5 3D diagram of the I-shaped waterproof strip at node C.

[0031] Figure 8 This is a schematic diagram of the intelligent adjustment system of the present invention.

[0032] Figure 9 This is a flowchart of the construction method of the present invention.

[0033] In the diagram: 1. Concrete insulation formwork layer; 2. Buffer air cushion layer; 3. Water heating layer; 4. Drainage layer; 5. Protective surface layer; 6. Waterproof layer; 7. Insulation layer; 8. Triangular bracket; 9. Through anchor hole; 10. Horizontal anchoring steel bar; 11. Fixed steel support; 12. Horizontal plate; 13. Fixed support system; 14. Double U-shaped waterproof groove; 15. I-shaped waterstop; 16. Polyurethane insulation layer; 17. Stainless steel protective layer; 18. Temperature sensor; 19. Ice thickness sensor; 20. Water level sensor; 21. Air pressure control device; 22. Water flow and water temperature dual control device; 23. Drainage control device; 24. Intelligent adjustment system; 25. Concrete triangular support system; 26. Horizontal drainage pipe; 27. Water collection trough. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: See Figure 1-8 A prefabricated, intelligent, controllable thermal insulation formwork for arch dams is disclosed. The formwork structure is multi-layered, including an inner concrete thermal insulation formwork layer 1. The outer layers of the concrete thermal insulation formwork layer 1 sequentially include a buffer air cushion layer 2, a water heating layer 3, a drainage layer 4, and a protective surface layer 5. The protective surface layer 5 is connected to the concrete thermal insulation formwork layer 1 via fixed steel supports 11. The concrete thermal insulation formwork layer 1 is connected to the dam body via pre-embedded reinforcing bars through anchor holes 9. This prefabricated, multi-layered permanent thermal insulation formwork simplifies traditional formwork construction processes, shortens the on-site formwork construction cycle, and improves construction efficiency.

[0036] Furthermore, the back face of the concrete insulation formwork layer 1 is provided with a concrete triangular support system 25 and horizontal anchoring steel bars 10; the concrete triangular support system 25 consists of two parts: a triangular bracket 8 and a horizontal plate 12, and the triangular bracket 8 and the horizontal plate 12 are provided with through anchoring holes 9 at positions horizontal to the dam body. By using the above-mentioned triangular bracket 8 and horizontal plate 12, the entire insulation formwork can be reliably anchored to the dam body.

[0037] Furthermore, the outer surface of the concrete insulation template layer 1 consists of a concrete structural layer, a waterproof layer 6, and an insulation layer 7 from the inside out. By adopting a permanent insulation template, the concrete can be effectively insulated during the construction period, avoiding the concrete cracking problem caused by the untimely and poor effect of traditional temporary insulation measures, and ensuring the quality of the arch dam concrete.

[0038] Furthermore, a fixed steel support 11 is provided on the outer surface of the concrete insulation formwork layer 1, which facilitates the connection of the protective surface layer 5.

[0039] Furthermore, the buffer air cushion layer 2 is arranged between the concrete insulation template layer 1 and the water heating layer 3, and is equipped with a temperature sensor 18 and an air pressure control device 21. The temperature sensor 18 is located on the outer surface of the protective surface layer 5, and the temperature sensor 18 and the air pressure control device 21 are connected to the intelligent control system 24 via a transmission line. When the temperature drops below zero, the air cushion layer can be automatically pressurized to reduce the deformation of the protective surface layer and reduce the damaging effect of ice thrust on the internal insulation layer and the protective surface layer.

[0040] Furthermore, the water-heating layer 3 is disposed on the inner surface of the protective layer 5 and consists of multiple circular tube structures. It is equipped with a water flow and temperature dual control device 22 and an ice thickness sensor 19. The ice thickness sensor 19 is disposed on the outer surface of the protective layer 5. The water flow and temperature dual control device 22 and the ice thickness sensor 19 are connected to the intelligent control system 24 via transmission lines. When the ice layer thickness exceeds the control value, hot water can be automatically circulated to heat the protective layer, melting the ice layer on the outer surface of the protective layer and reducing the damage to the protective layer caused by ice pull-out force.

[0041] Furthermore, the drainage layer 4 is equipped with a horizontal drainage pipe 26, a water level sensor 20, and a drainage control device 23. The horizontal drainage pipe 26 is located in the water collection tank 27 at the bottom of the protective surface layer 5, and the water level sensor 20 is installed in the water collection tank 27. The water level sensor 20 and the drainage control device 23 are connected to the intelligent control system 24 via a transmission line. When the cumulative seepage depth in the water collection tank at the bottom of the protective surface layer reaches the control value, it can automatically drain water to the outside, ensuring that the internal structure and facilities of the protective surface layer are not damaged by water intrusion.

[0042] Furthermore, the protective surface layer 5 is made of multiphase stainless steel and consists of an edge-sealing protective panel and a standard protective panel. Both types of protective panels have double U-shaped waterproof grooves 14 around their perimeter and a fixed support system 13 on the back, which is connected to a fixed steel support 11 via pins. By adopting the above-mentioned connection structure, a reliable connection between the protective surface layer 5 and the concrete insulation formwork layer 1 can be achieved.

[0043] Furthermore, the outer edge, bottom, and top of the edge sealing and protection panel are provided with a polyurethane insulation layer 16 and a stainless steel protective layer 17, which can reduce the damage to the I-shaped waterstop around the arch dam protection surface layer caused by adverse factors such as temperature and snow.

[0044] Furthermore, an I-shaped waterstop 15 is provided at the joint of the protective surface layer. The I-shaped waterstop 15 is placed in the double U-shaped waterproof groove 14. Horizontal and vertical grouting pipes are provided in the gap between the double U-shaped waterproof groove 15 and the I-shaped waterstop 14. After grouting, the joint of the protective surface layer can achieve double waterproofing and improve the seepage prevention effect.

[0045] Example 2: See Figure 9 A construction method for a smart control prefabricated multi-layer permanent insulation formwork for arch dams includes the following steps: S1, Pre-construction preparation: Check the flatness of the dam surface anchorage. S2, Install a buffer air cushion layer 2 on the outer surface of the concrete insulation template layer 1, and lay out transmission lines and vertical drainage pipes. S3, Install concrete formwork structure 1 and anchor the support system 25; S4, pouring concrete structure for the dam; S5, Install the water heating layer 3 on the inner surface of the protective layer 5, and lay the transmission line and horizontal drainage pipe 26. S6, Install protective surface layer 5; S7, equipped with temperature sensor 18, ice thickness sensor 19, water level sensor 20, air pressure control device 21, water flow and water temperature dual control device 22 and drainage control device 23. S8, install I-shaped waterstop 15, and lay out grouting pipes; S9, carry out grouting construction of the I-shaped waterstop 15; S10, install polyurethane insulation layer 16 and stainless steel protective layer 17 on the outer edge, bottom and top of the edge sealing and protective panel.

[0046] Furthermore, the protective surface layer 5 needs to be installed after the dam concrete has reached the design strength.

[0047] Furthermore, the grouting of the I-shaped waterstop 15 should be carried out after the protective surface layer 5 is installed and the internal buffer air cushion layer 2, water heating layer 3, drainage layer 4 and intelligent control system 24 are connected to the network and pass the trial operation and acceptance.

[0048] Furthermore, the construction of the polyurethane insulation layer 16 and stainless steel protective layer 17 on the outer edge, bottom, and bottom of the edge sealing and protective panel must be carried out after the grouting strength in S9 reaches the design requirements and the construction quality of the waterstop is accepted.

[0049] Furthermore, the fixed steel support 11 is connected to the fixed support system 13 by a pin, which facilitates the initial installation and the subsequent maintenance and replacement of the protective panel.

[0050] Furthermore, the gap between the stainless steel protective layer 17 and the concrete of the arch dam needs to be filled with asphalt for sealing.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A prefabricated, intelligent controllable thermal insulation template for arch dams, characterized in that, The thermal insulation template structure adopts a multi-layer structure, including a concrete thermal insulation template layer (1) located in the inner layer. The outer layer of the concrete thermal insulation template layer (1) is provided with a buffer air cushion layer (2), a water heating layer (3), a drainage layer (4) and a protective surface layer (5) in sequence. The protective surface layer (5) is connected to the concrete thermal insulation template layer (1) by a fixed steel support (11). The concrete thermal insulation template layer (1) is connected to the dam body by a pre-embedded bar through the through anchor hole (9).

2. The intelligent control prefabricated insulation template for arch dams according to claim 1, characterized in that: The concrete insulation formwork layer (1) is provided with a concrete triangular support system (25) and horizontal anchoring steel bars (10) on its back facade; the outer surface of the concrete insulation formwork layer (1) is provided with a waterproof layer (6), an insulation layer (7) and a fixed steel support (11); the concrete triangular support system (25) consists of two parts: a triangular bracket (8) and a horizontal plate (12), and the triangular bracket (8) and the horizontal plate (12) are provided with through anchor holes (9) at a position horizontal to the dam body.

3. The intelligent control prefabricated thermal insulation template for arch dams according to claim 1, characterized in that: The buffer air cushion layer (2) is arranged between the concrete insulation template layer (1) and the water heating layer (3), and is equipped with a temperature sensor (18) and an air pressure control device (21). The temperature sensor (18) is set on the outer surface of the protective surface layer (5), and the temperature sensor (18) and the air pressure control device (21) are connected to the intelligent control system (24) through a transmission line.

4. The intelligent control prefabricated thermal insulation template for arch dams according to claim 1, characterized in that: The water heating layer (3) is set on the inner surface of the protective layer (5) and is composed of multiple circular tube structures. It is equipped with a water flow and water temperature dual control device (22) and an ice thickness sensor (19). The ice thickness sensor (19) is set on the outer surface of the protective layer (5). The water flow and water temperature dual control device (22) and the ice thickness sensor (19) are connected to the intelligent control system (24) through a transmission line.

5. The intelligent control prefabricated thermal insulation template for arch dams according to claim 1, characterized in that: The drainage layer (4) is equipped with a horizontal drainage pipe (26), a water level sensor (20) and a drainage control device (23). The horizontal drainage pipe (26) is located in the water collection tank (27) at the bottom of the protective surface layer (5). The water level sensor (20) is located in the water collection tank (27). The water level sensor (20) and the drainage control device (23) are connected to the intelligent control system (24) through a transmission line.

6. The intelligent control prefabricated thermal insulation template for arch dams according to claim 1, characterized in that: The protective surface layer (5) is made of stainless steel and is divided into two types: edge-sealed protective panel and standard protective panel. Both types of protective panels are provided with double U-shaped waterproof grooves (14) around their perimeter. The protective surface layer (5) is provided with a fixed support system (13) on the back. The fixed support system (13) is connected to the fixed steel support (11) by a pin. The outer side, top and bottom of the edge-sealed protective panel are provided with a polyurethane insulation layer (16) and a stainless steel protective layer (17).

7. The intelligent control prefabricated thermal insulation template for arch dams according to claim 6, characterized in that: The protective surface layer (5) has an I-shaped waterstop (15) at the joint. The I-shaped waterstop (15) is placed in the double U-shaped waterproof groove (14). Horizontal and vertical grouting pipes are provided in the gap between the double U-shaped waterproof groove (14) and the I-shaped waterstop (15).

8. A construction method for an intelligent controllable prefabricated thermal insulation formwork for arch dams as described in any one of claims 1-7, characterized in that, Includes the following steps: S1, Pre-construction preparation: Check the flatness of the dam surface anchorage. S2, Install a buffer air cushion layer (2) on the outer surface of the concrete insulation formwork layer (1), and lay out transmission lines and vertical drainage pipes; S3, install the concrete formwork structure (1) and anchor the concrete triangular support system (25); S4, pouring concrete structure for the dam; S5, install a water heating layer (3) on the inner surface of the protective layer (5), and lay out transmission lines and horizontal drainage pipes (26). S6, Install the protective surface layer (5); S7, install temperature sensor (18), ice thickness sensor (19), water level sensor (20), air pressure control device (21), water flow and water temperature dual control device (22) and drainage control device (23). S8, install the I-shaped waterstop (15) and lay the grouting pipe; S9, carry out grouting construction of the I-shaped waterstop (15); S10, install polyurethane insulation layer (16) and stainless steel protective layer (17) on the outer edge, bottom and top of the edge sealing and protective panel.

9. The construction method of the intelligent control prefabricated thermal insulation formwork for arch dams according to claim 8, characterized in that, The protective surface layer (5) must be installed after the concrete strength of the dam body reaches the design requirements; Grouting of the I-shaped waterstop (15) should be carried out after the protective surface layer (5) is installed and the internal buffer air cushion layer (2), water heating layer (3), drainage layer (4) and intelligent control system (24) are connected to the network and pass the trial operation and acceptance.

10. The construction method of the intelligent control prefabricated thermal insulation formwork for arch dams according to claim 8, characterized in that, The construction of the polyurethane insulation layer (16) and stainless steel protective layer (17) on the outer edge, bottom and bottom of the edge sealing and protective panel must be carried out after the grouting strength in S9 reaches the design requirements and the construction quality of the waterstop is accepted. The gap between the stainless steel protective layer (17) and the concrete of the arch dam needs to be filled with asphalt and sealed.

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