Dumbbell-shaped bearing platform concrete temperature control system and dumbbell-shaped bearing platform

Abstract

The utility model discloses a dumbbell-shaped bearing platform concrete temperature control system and a dumbbell-shaped bearing platform. The dumbbell-shaped bearing platform concrete temperature control system comprises a plurality of cooling pipe layers in the transverse bridge direction, a plurality of cooling pipe layers in the longitudinal bridge direction and a plurality of temperature control monitoring nets used for monitoring the temperature in poured concrete in the bearing platform pouring forming process. And the plurality of transverse bridge direction cooling pipe layers and the plurality of longitudinal bridge direction cooling pipe layers are sequentially arranged at intervals in a staggered manner in the height direction of the bearing platform, so that poured concrete is layered by introduced cooling water, and the whole section of each layer is uniformly cooled. The multiple layers of temperature control monitoring nets are sequentially arranged at intervals in the height direction of the bearing platform so as to be used for layering the temperature in the poured concrete, and multi-measuring-point measurement is conducted on each layer. According to the novel temperature control system, uniform cooling of the internal temperature of the super-thick and super-large bearing platform concrete and effective control of the temperature difference of the internal surface of the large-size concrete can be achieved, temperature cracks caused by the fact that the temperature difference of the local internal surface of the bearing platform concrete is too high are reduced, and it is guaranteed that the dumbbell-shaped bearing platform is smoothly constructed and the construction quality is good.

Description

Technical Field

[0001] This utility model relates to the field of large-volume concrete construction technology, and in particular, to a dumbbell-shaped foundation concrete temperature control system. Furthermore, this utility model also relates to a dumbbell-shaped foundation incorporating the aforementioned dumbbell-shaped foundation concrete temperature control system. Background Technology

[0002] In civil engineering construction, large-volume concrete construction is frequently involved, such as in bridges, marine projects, and water conservancy dams. The main characteristic of large-volume concrete is its large volume; the smallest cross-section in any direction has a minimum dimension of 1 meter.

[0003] In a cable-stayed bridge project in Shantou City, Guangdong Province, a region with medium to high temperatures and near the ocean, the No. 7 main pier's foundation is a dumbbell-shaped foundation with a planar dimension of 63.0m × 20.5m and a height of 5.0m. The total concrete volume poured for the foundation is 5377m³. 3 It belongs to the dumbbell-shaped ultra-thick and ultra-large foundation structure. Due to the large number of layers of reinforcement in the foundation design, the small spacing between adjacent reinforcement bars, and the dumbbell-shaped foundation area of ​​1075m2, the concrete pouring time for each layer is long. In addition, due to the proximity to the marine concrete project, there are strict requirements for the early crack resistance, electrical flux and carbonation depth of the concrete.

[0004] In the current construction of large-volume concrete, the concrete has a short setting time, high heat of hydration, rapid internal temperature rise, fast solidification speed, slow heat dissipation, and large temperature difference between the inner and outer surfaces. This causes the concrete to evaporate moisture quickly, making it prone to temperature cracks, which in turn affects the durability and safety of the concrete structure. Utility Model Content

[0005] This invention provides a dumbbell-shaped foundation concrete temperature control system and a dumbbell-shaped foundation to solve the technical problems of short concrete setting time, high heat of hydration, rapid internal temperature rise, fast solidification speed, slow heat dissipation, and large internal and external temperature difference during the construction of large-volume concrete. These problems cause rapid evaporation of concrete moisture, leading to temperature cracks in the concrete, which in turn affects the durability and safety of the concrete structure.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A dumbbell-shaped concrete foundation temperature control system includes: multiple transverse cooling pipe layers and multiple longitudinal cooling pipe layers for introducing cooling water to cool the poured concrete during the foundation casting process; and a multiple temperature control monitoring network for monitoring the internal temperature of the poured concrete during the foundation casting process. The multiple transverse cooling pipe layers and multiple longitudinal cooling pipe layers are arranged alternately and interleaved along the height direction of the foundation to ensure that the introduced cooling water cools the poured concrete in layers and that each layer cools the entire cross-section uniformly. The multiple temperature control monitoring network is arranged alternately along the height direction of the foundation to measure the internal temperature of the poured concrete in layers and at multiple measuring points in each layer.

[0008] Furthermore, the transverse cooling pipe layer bends and extends from one end to the other along the length of the "dumbbell-shaped" foundation; the longitudinal cooling pipe layer bends and extends from one side to the other along the width of the "dumbbell-shaped" foundation; the multiple transverse cooling pipe layers and the multiple longitudinal cooling pipe layers are staggered in the height direction of the foundation, and each transverse cooling pipe layer and each longitudinal cooling pipe layer is horizontally arranged.

[0009] Furthermore, the multi-layer transverse bridge cooling pipe layer and the multi-layer longitudinal bridge cooling pipe layer are evenly spaced along the height direction of the pier cap, and the distance between adjacent transverse bridge cooling pipe layers and longitudinal bridge cooling pipe layers is 1 to 1.5 m; the lowest transverse bridge cooling pipe layer or longitudinal bridge cooling pipe layer is 0.5 to 1 m away from the top surface of the bottom sealing concrete layer below the pier cap; the uppermost transverse bridge cooling pipe layer or longitudinal bridge cooling pipe layer is 0.5 to 1 m away from the top surface of the pier cap.

[0010] Furthermore, each layer of transverse cooling pipe includes multiple sets of transverse cooling pipe groups with independent inlet and outlet water configurations. These multiple sets of transverse cooling pipe groups are arranged sequentially along the length of the foundation, and are symmetrical about the centerline of the foundation. The dumbbell-shaped foundation concrete temperature control system also includes a transverse water supply system for supplying water to the transverse cooling pipe layers. The transverse water supply system includes a water pump, a distributor connected to the water pump, a pressure reducing valve located between the water pump and the distributor, multiple water supply pipes connected to the distributor, and a control valve connected to the inlet end of each water supply pipe. The outlet end of the water supply pipe is connected to the inlet end of the corresponding transverse cooling pipe group.

[0011] Furthermore, the transverse bridge cooling pipe assembly includes straight sections along the bridge direction that are evenly spaced along the length of the foundation and extend along the width of the foundation, and a first connecting arc segment that connects two adjacent straight sections along the bridge direction and is arc-shaped; there is a spacing of 1 to 1.5m between two adjacent straight sections along the bridge direction.

[0012] Furthermore, each layer of longitudinal cooling pipe includes multiple sets of independently configured longitudinal cooling pipe groups with inlet and outlet water supply. These multiple sets of longitudinal cooling pipe groups are symmetrically arranged before and after the centerline in the width direction of the foundation. The dumbbell-shaped foundation concrete temperature control system also includes a longitudinal water supply system for supplying water to the longitudinal cooling pipe layers. The longitudinal water supply system includes a water pump, a water distributor connected to the water pump, a pressure reducing valve located between the water pump and the water distributor, multiple water supply pipes connected to the water distributor, and a control valve connected to the inlet end of each water supply pipe. The outlet end of the water supply pipe is connected to the inlet end of the corresponding longitudinal cooling pipe group.

[0013] Furthermore, the longitudinal cooling pipe assembly includes transverse straight sections evenly spaced along the width of the pier and extending along the length of the pier, and a second connecting arc section that connects two adjacent transverse straight sections and is arc-shaped; there is a spacing of 1 to 1.5 m between two adjacent transverse straight sections.

[0014] Furthermore, the dumbbell-shaped foundation concrete temperature control system also includes a foundation steel mesh supported on the bottom sealing concrete layer below the foundation; multi-layer transverse bridge cooling pipe layers and multi-layer longitudinal bridge cooling pipe layers are respectively supported on the foundation steel mesh.

[0015] Furthermore, each layer of the temperature control monitoring network includes multiple temperature control monitoring points deployed at the same height, and each temperature control monitoring point is equipped with a set of temperature monitoring devices for monitoring temperature.

[0016] According to another aspect of the present invention, a dumbbell-shaped foundation is also provided, wherein a dumbbell-shaped foundation concrete temperature control system as described in any of the above is provided.

[0017] This utility model has the following beneficial effects:

[0018] In this utility model's temperature control system, multiple layers of transverse and longitudinal cooling pipes are arranged alternately and interlaced along the height of the foundation, allowing the incoming cooling water to cool the poured concrete in layers, ensuring uniform cooling of the entire cross-section of each layer. Simultaneously, a multi-layered temperature monitoring network is set alternately along the height of the foundation to measure the internal temperature of the poured concrete in layers, with multiple measuring points in each layer. This allows for construction monitoring of the highest internal temperature of the poured concrete, the temperature difference between the interior and surface of the concrete, and the cooling rate at the center point of the concrete. This achieves uniform cooling of the internal temperature of the ultra-thick and ultra-large foundation concrete and effective control of the temperature difference between the interior and surface of the large-volume concrete. The cooling rate of the foundation concrete is ≤2.0℃ / d, and the temperature difference between the highest internal temperature and the surface temperature is ≤20℃. This ensures that the temperature stress of the foundation concrete does not exceed the tensile strength of the concrete, reducing temperature cracks caused by excessively high local internal and surface temperature differences. This ensures smooth construction and high-quality construction of the ultra-thick and ultra-large dumbbell-shaped foundation concrete.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a half-width plan view of the transverse bridge cooling pipe layer layout of a preferred embodiment of this utility model;

[0022] Figure 2 This is a half-width elevation diagram of the transverse bridge cooling pipe layer layout of a preferred embodiment of this utility model;

[0023] Figure 3 This is a half-width plan view of the cooling pipe layer layout along the bridge direction in a preferred embodiment of this utility model;

[0024] Figure 4 This is a half-width elevation diagram of the preferred embodiment of the present invention, showing the layout of the cooling pipe layers along the bridge direction;

[0025] Figure 5 This is a schematic diagram of the cross-sectional layout of the temperature control monitoring network according to a preferred embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the temperature control monitoring network layout according to a preferred embodiment of the present invention.

[0027] Legend:

[0028] 1. Sealing concrete layer;

[0029] 2. Foundation; 201. Temperature measuring hole;

[0030] 3. Transverse bridge cooling tube layer; 31. Transverse bridge cooling tube assembly; 311. First water inlet; 312. First water outlet;

[0031] 4. Cooling pipe layer along the bridge; 41. Cooling pipe assembly along the bridge; 411. Second water inlet; 412. Second water outlet;

[0032] 5. Temperature control monitoring network; 51. Temperature control monitoring points. Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0034] Reference Figure 1-6 A preferred embodiment of this utility model provides a dumbbell-shaped foundation concrete temperature control system, comprising: a multi-layer transverse cooling pipe layer 3 and a multi-layer longitudinal cooling pipe layer 4 for introducing cooling water to cool the poured concrete during the foundation 2 casting process; and a multi-layer temperature monitoring network 5 for monitoring the internal temperature of the poured concrete during the foundation 2 casting process. The multi-layer transverse cooling pipe layer 3 and the multi-layer longitudinal cooling pipe layer 4 are arranged alternately and interleaved along the height direction of the foundation 2 to ensure that the introduced cooling water cools the poured concrete in layers, with each layer providing uniform cooling across the entire cross-section. The multi-layer temperature monitoring network 5 is arranged alternately along the height direction of the foundation 2 to measure the internal temperature of the poured concrete in layers, with multiple measuring points in each layer.

[0035] In the temperature control system of this utility model, multiple layers of transverse cooling pipes 3 and multiple layers of longitudinal cooling pipes 4 are arranged alternately and interlaced along the height direction of the foundation 2, so that the incoming cooling water cools the poured concrete in layers and the entire cross section is uniformly cooled in each layer. At the same time, multiple layers of temperature control monitoring network 5 are set alternately along the height direction of the foundation 2 to measure the temperature inside the poured concrete in layers and multiple measuring points in each layer. During the concrete construction, the maximum internal temperature of the poured concrete, the temperature difference between the inside and the surface of the concrete, and the cooling rate at the center point of the concrete are monitored to achieve uniform cooling of the internal temperature of the ultra-thick and ultra-large foundation concrete and effective control of the temperature difference between the inside and the surface of the large volume concrete. The cooling rate of the foundation concrete is ≤2.0℃ / d and the temperature difference between the maximum internal temperature and the surface temperature of the foundation concrete is ≤20℃. This ensures that the temperature stress of the foundation concrete does not exceed the tensile strength of the concrete, reduces the temperature cracks caused by excessive local internal and surface temperature differences in the foundation concrete, and ensures the smooth construction and good construction quality of the ultra-thick and ultra-large dumbbell-shaped foundation concrete.

[0036] Optionally, such as Figure 1 and Figure 3As shown, the transverse cooling pipe layer 3 extends from one end of the "dumbbell-shaped" support 2 along its length. The longitudinal cooling pipe layer 4 extends from one side of the "dumbbell-shaped" support 2 along its width. The multiple transverse cooling pipe layers 3 and multiple longitudinal cooling pipe layers 4 are staggered along the height of the support 2, and each transverse cooling pipe layer 3 and each longitudinal cooling pipe layer 4 is horizontally arranged. In this optional scheme, the transverse cooling pipe layer 3 bends and extends from one end of the "dumbbell-shaped" support 2 along its length, while the longitudinal cooling pipe layer 4 bends and extends from one side of the "dumbbell-shaped" support 2 along its width. This means that, spatially, the pipe routes of the transverse cooling pipe layer 3 and the longitudinal cooling pipe layer 4 are perpendicular to each other, i.e., the water flow directions are perpendicular to each other. Furthermore, multiple layers of transverse cooling pipe layer 3 and multiple layers of longitudinal cooling pipe layer 4 are staggered along the height of the support 2, i.e., one layer of transverse cooling pipe layer 3, one layer of longitudinal cooling pipe layer 4, another layer of transverse cooling pipe layer 3, another layer of longitudinal cooling pipe layer 4… and so on, in a staggered manner. Figure 2 and Figure 4 As shown, this allows for layered cooling of the internal temperature of the poured concrete in ultra-thick and ultra-large dumbbell-shaped foundations, with each layer undergoing full-section cooling. This achieves uniform cooling of the entire poured concrete interior, reducing the risk of temperature cracks caused by excessive temperature differences between the concrete interior and surface in localized areas.

[0037] In this optional solution, such as Figure 2 and Figure 4As shown, multiple layers of transverse cooling pipes 3 and multiple layers of longitudinal cooling pipes 4 are evenly spaced along the height of the foundation 2, with adjacent layers of transverse cooling pipes 3 and longitudinal cooling pipes 4 spaced 1–1.5 m apart. The lowest layer of transverse cooling pipes 3 or longitudinal cooling pipes 4 is 0.5–1 m from the top surface of the bottom sealing concrete layer 1 below the foundation 2. The highest layer of transverse cooling pipes 3 or longitudinal cooling pipes 4 is 0.5–1 m from the top surface of the foundation 2. In actual construction, the concrete of the foundation 2 is poured in two stages: 3.0 m + 2.0 m. In the first stage of concrete pouring for the foundation 2, three layers of cooling pipes are arranged in a staggered pattern, i.e., the first and third layers of transverse cooling pipes 3 are arranged in the transverse direction, and the second layer of longitudinal cooling pipes 4 is arranged in the longitudinal direction. Specifically: the first layer of transverse bridge cooling pipe layer 3 is 0.5m away from the bottom surface of the first concrete layer of the foundation 2 (i.e., the top surface of the bottom sealing concrete layer 1); the third layer of transverse bridge cooling pipe layer 3 is 0.5m away from the top surface of the first concrete layer of the foundation 2 (i.e., the boundary line of the foundation layer pouring); and the vertical distance between adjacent transverse bridge cooling pipe layers 3 and longitudinal bridge cooling pipe layers 4 is 1.0m. In the second concrete of the pier cap 2, two layers of cooling pipes are arranged in a "longitudinal and transverse staggered" manner. That is, the fourth layer of longitudinal cooling pipe 4 is arranged in the longitudinal direction of the bridge, and the fifth layer of transverse cooling pipe 3 is arranged in the transverse direction of the bridge. The fourth layer of longitudinal cooling pipe 4 is 0.5m away from the top surface of the first concrete of the pier cap 2 (i.e., the boundary of the layered pouring of the pier cap), and the fifth layer of transverse cooling pipe 3 is 0.5m away from the top surface of the second concrete of the pier cap 2 (i.e., the top surface of the pier cap 2). The vertical distance between adjacent transverse cooling pipe layers 3 and longitudinal cooling pipe layers 4 is also 1.0m.

[0038] In this optional solution, such as Figure 1 As shown, each layer of transverse cooling pipes 3 includes multiple sets of independently inlet and outlet transverse cooling pipe groups 31. These multiple sets of transverse cooling pipe groups 31 are arranged sequentially along the length of the foundation 2, and are symmetrical about the centerline of the foundation 2. In this optional scheme, since each layer of transverse cooling pipes 3 includes multiple sets of independently inlet and outlet transverse cooling pipe groups 31, it is convenient to select some transverse cooling pipe groups 31 for water flow according to the actual construction needs of the foundation 2 concrete pouring, so as to achieve uniform cooling of the internal temperature of the foundation 2 concrete. In this optional scheme, the transverse cooling pipe groups 31 are made of Φ42.25mm×3.25mm steel pipes, with a first inlet 311 and a first outlet 312 at both ends.

[0039] Furthermore, the dumbbell-shaped foundation concrete temperature control system also includes a transverse bridge water supply system for supplying water to the transverse bridge cooling pipe layer 3. The transverse bridge water supply system includes a water pump, a distributor connected to the water pump, a pressure reducing valve installed between the water pump and the distributor, multiple water supply pipes connected to the distributor, and control valves connected to the inlet ends of each water supply pipe. The outlet end of the water supply pipe is connected to the inlet end of the corresponding transverse bridge cooling pipe group 31. In this optional scheme, the distributor pump is equipped with an independent control valve to control the cooling water flow rate of each transverse bridge cooling pipe group 31, and a pressure reducing valve is installed to control the water pump's inflow to control the overall water pressure of the distributor. The transverse bridge cooling pipe group 31 is formed by connecting multiple sections of cooling water pipes sequentially along its extension direction using threaded connections and Teflon tape. Before concrete pouring, the transverse cooling pipe assembly 31 must undergo a pressurized water flow test for no less than 30 minutes to check whether the water flow rate is appropriate. If any cracks, leaks, or blockages are found in the transverse cooling pipe assembly 31, they must be repaired in time until it can work normally.

[0040] In specific embodiments of this optional solution, such as Figure 1 As shown, the transverse bridge cooling pipe assembly 31 includes straight sections extending along the width of the foundation 2 and evenly spaced along its length, and a first connecting arc segment connecting two adjacent straight sections in an arc shape. The distance between two adjacent straight sections is 1 to 1.5 meters.

[0041] In this optional solution, such as Figure 3 As shown, each layer of cooling pipes along the bridge direction 4 includes multiple sets of independently inlet and outlet cooling pipe groups 41. These multiple sets of cooling pipe groups 41 are symmetrically arranged along the centerline of the width direction of the foundation 2. In this optional scheme, since each layer of cooling pipes along the bridge direction 4 includes multiple sets of independently inlet and outlet cooling pipe groups 41, it is convenient to select some cooling pipe groups 41 to be circulated with water according to the actual construction needs of the concrete pouring of the foundation 2, so as to achieve uniform cooling of the internal temperature of the concrete of the foundation 2. In this optional scheme, the cooling pipe groups 41 are made of Φ42.25mm×3.25mm steel pipes, with a second inlet 411 and a second outlet 412 at both ends.

[0042] Furthermore, the dumbbell-shaped foundation concrete temperature control system also includes a bridge-direction water supply system for supplying water to the bridge-direction cooling pipe layer 4. The bridge-direction water supply system includes a water pump, a distributor connected to the water pump, a pressure reducing valve located between the water pump and the distributor, multiple water supply pipes connected to the distributor, and control valves connected to the inlet ends of each water supply pipe. The outlet ends of the water supply pipes are connected to the inlet ends of the corresponding bridge-direction cooling pipe group 41. In this optional scheme, the distributor pump is equipped with an independent control valve to control the cooling water flow rate of each bridge-direction cooling pipe group 41, and a pressure reducing valve is installed to control the water pump's inflow to control the overall water pressure of the distributor. The bridge-direction cooling pipe group 41 is formed by connecting multiple sections of cooling water pipes sequentially along its extension direction using threaded connections and Teflon tape. Before concrete pouring, the cooling pipe assembly 41 along the bridge direction must undergo a pressurized water flow test for no less than 30 minutes to check whether the water flow rate is appropriate. If any cracks, leaks, or blockages are found in the cooling pipe assembly 41 along the bridge direction, they must be repaired in time until it can work normally.

[0043] In specific embodiments of this optional solution, such as Figure 4 As shown, the longitudinal cooling pipe assembly 41 includes transverse straight sections evenly spaced along the width direction of the foundation 2 and extending along the length direction of the foundation 2, and a second connecting arc segment that connects two adjacent transverse straight sections and is arc-shaped. There is a spacing of 1 to 1.5 m between two adjacent transverse straight sections.

[0044] Optionally, the dumbbell-shaped foundation concrete temperature control system also includes a foundation steel mesh supported on the bottom sealing concrete layer 1 below the foundation 2. Multi-layer transverse cooling pipe layers 3 and multi-layer longitudinal cooling pipe layers 4 are respectively supported on the foundation steel mesh, fixed with vertical steel bars, and securely welded to the support brackets using U-shaped positioning bars, thereby achieving stable support for the multi-layer transverse cooling pipe layers 3 and multi-layer longitudinal cooling pipe layers 4, and improving the structural rigidity of the foundation itself.

[0045] Optionally, such as Figure 5-6 As shown, each layer of temperature control monitoring network 5 includes multiple temperature control monitoring points 51 arranged at the same height position. Each temperature control monitoring point 51 is equipped with a set of temperature monitoring devices for monitoring temperature, and a number of corresponding temperature measuring holes 201 are formed in the support platform 2.

[0046] In actual construction, taking a 5m high foundation as an example: the layout of temperature monitoring points 51 is based on the characteristics of the large volume of concrete in foundation 2, and is operated by professional technicians. To protect the conductors and measuring points from the influence of concrete vibration, 35×3mm equal-sided angle steel is used for protection. Temperature monitoring points 51 are laid out on the left or right half of foundation 2 in the transverse direction. Five layers of horizontal temperature monitoring network 5 are laid out along the height of foundation 2, with 14 temperature monitoring points 51 in each layer, for a total of 70 temperature monitoring points 51. Furthermore, according to the construction plan for foundation 2, foundation 2 is divided into two pouring phases of 3.0m + 2.0m. The temperature monitoring points 51 are also laid out in two phases. Taking the layout of temperature monitoring points 51 on the right half of foundation 2 as an example... Figure 5 , Figure 6 As shown, the details are as follows:

[0047] (1) Layout of temperature monitoring points 51 in the first stage of pier 2: Three layers of horizontal temperature monitoring network 5 are laid in the first stage of pier 2, with 14 temperature monitoring points 51 in each layer, for a total of 42 temperature monitoring points 51. Among them: in the height direction of pier 2, the first layer of temperature monitoring points 51 is 0.05m away from the bottom surface of the first stage of pier 2 (i.e., the top surface of the bottom sealing concrete layer 1), the second layer of temperature monitoring points 51 is 1.5m away from the bottom surface of the first stage of pier 2 (i.e., the top surface of the bottom sealing concrete layer 1), and the third layer of temperature monitoring points 51 is 2.95m away from the bottom surface of the first stage of pier 2 (i.e., the top surface of the bottom sealing concrete layer 1); in the transverse direction plane of pier 2, 14 temperature monitoring points 51 are laid in each layer.

[0048] (2) Layout of the second temperature monitoring points 51 in the pier 2: Two horizontal temperature monitoring layers 5 are laid in the second concrete of the pier 2, with 14 temperature monitoring points 51 in each layer, for a total of 28 temperature monitoring points 51. Among them: in the height direction of the pier 2, the fourth layer of temperature monitoring points 51 is 4.00m away from the bottom surface of the first concrete of the pier 2 (i.e., the top surface of the bottom sealing concrete layer 1), and the fifth layer of temperature monitoring points 51 is 4.95m away from the bottom surface of the first concrete of the pier 2 (i.e., the top surface of the bottom sealing concrete layer 1) (i.e., the fifth layer of temperature monitoring points 51 is 0.05m away from the top surface of the pier 2); in the transverse direction plane of the pier 2, 14 temperature monitoring points 51 are laid in each layer.

[0049] (3) Layout of temperature monitoring points 51 on each floor: On the plane of the transverse bridge of the pier 2, 14 temperature monitoring points 51 are laid out on each floor, such as... Figure 6 As shown, the details are as follows:

[0050] 1) Transverse Bridge Temperature Control Monitoring Line: Starting from the center point of the pier 2 plane, extending along the transverse bridge direction of pier 2 to the right edge of pier 2, 9 temperature control monitoring points 51 are set up to form a transverse bridge temperature control monitoring line, and are numbered sequentially as: WKJCD1, WKJCD2, WKJCD3, WKJCD4, WKJCD5, WKJCD6, WKJCD7, WKJCD8, WKJCD9. Among them, the horizontal distance between WKJCD1 and WKJCD2 is 7m, and the horizontal distance between WKJCD2 and WKJCD9 is 7m. The horizontal spacing between CD3 is 6m, the horizontal spacing between WKJCD3 and WKJCD4 is 6m, the horizontal spacing between WKJCD4 and WKJCD5 is 5m, the horizontal spacing between WKJCD5 and WKJCD6 is 4m, the horizontal spacing between WKJCD6 and WKJCD7 is 2m, the horizontal spacing between WKJCD7 and WKJCD8 is 1m, the horizontal spacing between WKJCD8 and WKJCD9 is 0.45m, and the horizontal spacing between WKJCD9 and the right edge of the foundation 2 is 0.05m.

[0051] 2) Temperature monitoring line along the bridge: Starting from point 4 on the plane of pier 2, extend along the bridge direction of pier 2 to the rear edge of pier 2, and set up 5 temperature monitoring points 51 to form a temperature monitoring line along the bridge, which are numbered as follows: WKJCD10, WKJCD11, WKJCD12, WKJCD13, WKJCD14. Among them, the horizontal distance between WKJCD4 and WKJCD10 is 3.75m, the horizontal distance between WKJCD10 and WKJCD11 is 3m, the horizontal distance between WKJCD11 and WKJCD12 is 2m, the horizontal distance between WKJCD12 and WKJCD13 is 1m, the horizontal distance between WKJCD13 and WKJCD14 is 0.45m, and the horizontal distance between WKJCD14 and the rear edge of pier 2 is 0.05m.

[0052] 3) Angle between transverse and longitudinal temperature control monitoring lines: The transverse and longitudinal temperature control monitoring lines are laid out at a 90° angle on the pier plane, forming a T-shape.

[0053] In this invention, the T-shaped temperature monitoring network 5, which is laid out in stages and layers on the 1 / 4 foundation 2, can scientifically reflect the hydration heat process of ultra-thick and ultra-large foundation concrete. It can be compared and analyzed with theoretical calculations at any time, and the parameter values ​​can be adjusted and the calculation model can be corrected in a timely manner. Corresponding temperature control measures can be taken to ensure that the temperature stress of the foundation concrete does not exceed the tensile strength of the concrete, thus avoiding temperature cracks. It can also reduce the waste of temperature monitoring elements and lower the construction monitoring cost.

[0054] Optionally, a preferred embodiment of this utility model also provides a dumbbell-shaped foundation, which is equipped with a dumbbell-shaped foundation concrete temperature control system as described in any one of the above-mentioned embodiments. Thus, the dumbbell-shaped foundation of this utility model allows the introduced cooling water to cool the poured concrete in layers, with each layer cooling the entire cross-section uniformly. Simultaneously, a multi-layer temperature control monitoring network 5 is sequentially and spaced along the height of the foundation 2 to measure the temperature inside the poured concrete in layers, with multiple measuring points in each layer. This allows for construction monitoring of the highest internal temperature of the poured concrete, the temperature difference between the inside and surface of the concrete, and the cooling rate at the center point of the concrete during concrete construction. This achieves uniform cooling of the internal temperature of the ultra-thick and ultra-large foundation concrete, and effective control of the temperature difference between the inside and surface of the large-volume concrete. The cooling rate of the foundation concrete is ≤2.0℃ / d, and the temperature difference between the highest internal temperature and the surface temperature of the foundation concrete is ≤20℃. This ensures that the temperature stress of the foundation concrete does not exceed the tensile strength of the concrete, reduces temperature cracks caused by excessively high local internal and surface temperature differences, and ensures smooth construction and good construction quality of the ultra-thick and ultra-large dumbbell-shaped foundation concrete.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dumbbell-shaped foundation concrete temperature control system, characterized in that, include: Multi-layer transverse cooling pipe layer (3) and multi-layer longitudinal cooling pipe layer (4) are used to introduce cooling water to cool the concrete during the casting process of the foundation (2), and multi-layer temperature control monitoring network (5) is used to monitor the temperature inside the concrete during the casting process of the foundation (2). Multi-layer transverse cooling pipe layer (3) and multi-layer longitudinal cooling pipe layer (4) are arranged alternately and interlaced along the height direction of the foundation (2) so that the incoming cooling water can cool the poured concrete in layers and the entire cross section of each layer is uniformly cooled. A multi-layer temperature control monitoring network (5) is set up at intervals along the height direction of the foundation (2) to measure the temperature inside the poured concrete in layers with multiple measuring points in each layer.

2. The dumbbell-shaped foundation concrete temperature control system according to claim 1, characterized in that, The transverse bridge extends from one end of the "dumbbell-shaped" support (2) along the length of the cooling pipe layer (3) to the other end; The cooling pipe layer (4) along the bridge bends and extends from one side to the other in the width direction of the "dumbbell-shaped" support (2); The multi-layer transverse cooling pipe layer (3) and the multi-layer longitudinal cooling pipe layer (4) are staggered in the height direction of the foundation (2), and each layer of transverse cooling pipe layer (3) and each layer of longitudinal cooling pipe layer (4) are horizontally arranged.

3. The dumbbell-shaped foundation concrete temperature control system according to claim 2, characterized in that, The multi-layer transverse bridge cooling pipe layer (3) and the multi-layer longitudinal bridge cooling pipe layer (4) are evenly spaced along the height direction of the foundation (2), and the distance between adjacent transverse bridge cooling pipe layers (3) and longitudinal bridge cooling pipe layers (4) is 1 to 1.5 m. The bottom layer of transverse bridge cooling pipe (3) or longitudinal bridge cooling pipe (4) is 0.5 to 1 m away from the top surface of the bottom sealing concrete layer (1) below the foundation (2); The uppermost transverse bridge cooling pipe layer (3) or longitudinal bridge cooling pipe layer (4) is 0.5 to 1 m away from the top surface of the foundation (2).

4. The dumbbell-shaped foundation concrete temperature control system according to claim 2, characterized in that, Each layer of transverse cooling pipe (3) includes multiple sets of transverse cooling pipe groups (31) with independent inlet and outlet water. The multiple sets of transverse cooling pipe groups (31) are arranged sequentially along the length of the foundation (2), and the multiple sets of transverse cooling pipe groups (31) are symmetrical about the center line of the foundation (2) on the left and right. The dumbbell-shaped foundation concrete temperature control system also includes a transverse bridge water supply system for supplying water to the transverse bridge cooling pipe layer (3). The transverse bridge water supply system includes a water pump, a water distributor connected to the water pump, a pressure reducing valve set between the water pump and the water distributor, multiple water supply pipes connected to the water distributor, and a control valve connected to the inlet end of each water supply pipe. The outlet end of the water supply pipe is connected to the inlet end of the corresponding transverse bridge cooling pipe group (31).

5. The dumbbell-shaped foundation concrete temperature control system according to claim 4, characterized in that, The transverse cooling pipe assembly (31) includes a straight section along the bridge direction that is evenly spaced along the length of the foundation (2) and extends along the width of the foundation (2), and a first connecting arc segment that connects two adjacent straight sections along the bridge direction and is arc-shaped. There is a spacing of 1 to 1.5 meters between two adjacent straight sections along the bridge direction.

6. The dumbbell-shaped foundation concrete temperature control system according to claim 2, characterized in that, Each layer of the longitudinal cooling pipe layer (4) includes multiple sets of longitudinal cooling pipe groups (41) with independent inlet and outlet water configuration. The multiple sets of longitudinal cooling pipe groups (41) are symmetrically arranged before and after the center line of the width direction of the foundation (2). The dumbbell-shaped foundation concrete temperature control system also includes a bridge-direction water supply system for supplying water to the bridge-direction cooling pipe layer (4). The bridge-direction water supply system includes a water pump, a water distributor connected to the water pump, a pressure reducing valve set between the water pump and the water distributor, multiple water supply pipes connected to the water distributor, and a control valve connected to the inlet end of each water supply pipe. The outlet end of the water supply pipe is connected to the inlet end of the corresponding bridge-direction cooling pipe group (41).

7. The dumbbell-shaped foundation concrete temperature control system according to claim 6, characterized in that, The longitudinal cooling pipe assembly (41) includes a transverse straight section that is evenly spaced along the width direction of the foundation (2) and extends along the length direction of the foundation (2), and a second connecting arc section that connects two adjacent transverse straight sections and is arc-shaped. There is a spacing of 1 to 1.5 meters between two adjacent transverse straight sections of the bridge.

8. The dumbbell-shaped foundation concrete temperature control system according to claim 1, characterized in that, The dumbbell-shaped foundation concrete temperature control system also includes a foundation steel mesh supported on the bottom sealing concrete layer (1) below the foundation (2); The multi-layer transverse cooling pipe layer (3) and the multi-layer longitudinal cooling pipe layer (4) are respectively supported on the steel reinforcement mesh of the pier cap.

9. The dumbbell-shaped foundation concrete temperature control system according to claim 1, characterized in that, Each layer of temperature control monitoring network (5) includes multiple temperature control monitoring points (51) set up at the same height position, and each temperature control monitoring point (51) is equipped with a set of temperature monitoring devices for monitoring temperature.

10. A dumbbell-shaped support platform, characterized in that, It is equipped with a dumbbell-shaped concrete temperature control system for the foundation as described in any one of claims 1-9.

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