Massive concrete temperature measuring and crack preventing device and construction method

Abstract

The application discloses a mass concrete temperature measuring and crack preventing device and a construction method, which comprises a reinforcing mesh arranged on a foundation bottom surface, a pipeline support and a cooling pipe, the reinforcing mesh is arranged above the foundation bottom surface through support blocks, at least two rows of support assemblies are arranged on the reinforcing mesh at intervals, each row of the support assemblies is composed of at least two U-shaped supports, the cooling pipe is arranged between adjacent support assemblies, the cooling pipe is connected with the U-shaped supports through a pipeline connecting piece, one end of the cooling pipe is a water inlet end, and the other end is a water outlet end, the water inlet end is connected with a water supply pump body, the water outlet end is connected with a water return pipeline, and the water return pipeline is connected with a cooling water source to form a circulating loop. The grid positioning assembly is used to accurately arrange the cooling pipe in the same height, the cooling pipe structure combining softness and hardness and the multiple locking type pipeline connecting piece are adopted, the problems of poor arrangement precision, easy displacement and water leakage of the traditional pipeline are effectively solved, the construction difficulty is reduced, and the operation stability of the water circulating system is improved.

Description

Technical Field

[0001] This invention relates to a concrete protection device, and more particularly to a large-volume concrete temperature measurement and crack prevention device and construction method, belonging to the field of building construction technology. Background Technology

[0002] During the pouring of large-volume concrete, the cement hydration reaction inside continuously releases a large amount of heat. Due to the poor thermal conductivity of concrete, this internal heat cannot dissipate quickly, easily causing the internal temperature of the structure to be much higher than the surface temperature, resulting in a significant temperature difference between the inside and outside. According to concrete temperature control specifications, when the temperature difference between the inside and outside of the concrete exceeds 25°C, significant thermal stress will be generated inside the structure, leading to surface cracks or even through cracks. This seriously affects the integrity, durability, and load-bearing capacity of the concrete structure, posing a great threat to project quality and subsequent operational safety.

[0003] Currently, pre-embedded cooling water pipes are commonly used in engineering for water circulation and cooling. The cooling water removes the heat of hydration accumulated inside the concrete, thereby controlling the temperature difference between the inside and outside and reducing the risk of cracking. However, existing cooling systems still have many shortcomings in practical applications: ① Traditional cooling pipes mostly use integral rigid steel pipes. The pipes are rigid and cannot adapt to complex working conditions such as deviations in the arrangement of steel bars and uneven foundation surfaces on the construction site. The bending and alignment during the laying process are difficult, which can easily lead to problems such as misalignment of pipe ends, poor sealing, and water leakage later. The water circulation system has poor stability. ② The cooling pipes are only fixed to the steel bars by binding wires and lack a dedicated support and positioning structure. During the concrete pouring and vibration process, the pipes are prone to floating, shifting and deforming due to the lateral pressure of the concrete and the vibration disturbance, which leads to the disorder of the cooling circuit, insufficient local cooling effect and still poses a risk of cracking. ③ The laying of cooling pipes relies heavily on the experience of construction workers, lacking a unified positioning benchmark. The pipe spacing and burial height have large deviations, and the cooling rate is inconsistent in different areas of the same structure, resulting in poor temperature control uniformity. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a large-volume concrete temperature measurement and crack prevention device and construction method, which solves the problems of excessive rigidity, poor on-site adaptability, easy displacement and deformation, and low laying accuracy of traditional cooling pipes, so as to achieve high-precision and standardized laying of cooling pipes, improve the operational stability of water circulation system, and reduce construction difficulty.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows: A large-volume concrete temperature measurement and crack prevention device includes a steel mesh, pipe supports, and cooling pipes installed on the foundation bottom surface. The steel mesh is supported above the foundation bottom surface by support blocks. At least two rows of support components are spaced apart on the steel mesh. Each row of support components consists of at least two U-shaped supports. A cooling pipe is installed between adjacent support components. The cooling pipe consists of a straight pipe and a flexible steel wire hose. The straight pipe is connected to the U-shaped supports through pipe connectors. The ends of adjacent straight pipes are connected to each other through flexible steel wire hoses to form a serpentine loop. One end of the cooling pipe is a water inlet, and the other end is a water outlet. The water inlet is connected to a water supply pump body, and the water outlet is connected to a return water pipe. The return water pipe is connected to a cooling water source to form a circulation loop.

[0006] The pipe connector consists of a clamp, an L-shaped bracket, and a U-shaped clamp. The clamp is composed of two arc-shaped plates with a rubber pad on the inner wall. The arc-shaped plates are fixedly connected to the U-shaped bracket by bolts. The outer wall of the clamp has an L-shaped bracket. The U-shaped clamp passes through the L-shaped bracket and has a matching nut threaded to the end of the L-shaped bracket, thereby fixing the cooling pipe to the L-shaped bracket.

[0007] The circulation loop includes a cooling water tank, a water supply pump body, an inlet main pipe, and a return main pipe; the inlet end of the cooling pipe flows into the inlet main pipe through an inlet branch pipe, and the outlet end flows into the return main pipe through an outlet branch pipe; the inlet main pipe is equipped with a flow regulating valve, the end of the return main pipe is connected to the cooling water tank, and the water supply pump body sends the cooling water in the cooling water tank into the inlet main pipe.

[0008] The bottom of the U-shaped bracket is provided with supports at both ends, and the supports are fixedly connected by binding or welding; the support block is a concrete pad block with a height of 30-50mm.

[0009] The construction method of the large-volume concrete temperature measurement and crack prevention device includes the following steps: S1. Determine the total length of the cooling pipe according to the base size, cut the straight pipe, and prepare the steel wire hose and pipe connectors. S2. Using the upper edge of the reinforcing mesh as side A, the lower edge as side B, the left side as side C, and the right side as side D, according to the longitudinal distribution spacing of the U-shaped support, first base rod assemblies are set on the outer sides of the reinforcing mesh corresponding to sides A and B; according to the transverse distribution spacing of the U-shaped support, second base rod assemblies are set on the outer sides of the reinforcing mesh corresponding to sides C and D; wherein: the first base rod assembly and the second base rod assembly have the same structure, both consisting of a base, a vertical rod, and a displacement sleeve. The base is fixedly connected to the ground by a positioning pin, and a positioning cylinder is provided on the base. The positioning cylinder contains a vertical rod, which is fixed by bolts on the outer wall of the vertical rod. A displacement sleeve is slidably connected to the vertical rod and fixed by bolts on one side of the outer wall of the displacement sleeve; a positioning ring is provided on the other side of the outer wall of the displacement sleeve; S3. Set a reference rope between the base rod assemblies of side A and side B as a transverse reference line, and set a reference rope between the base rod assemblies of side C and side D as a longitudinal reference line. S4. Arrange the U-shaped brackets according to the location of the intersection of the horizontal and vertical baselines; S5. After the U-shaped brackets are arranged, install cooling pipes between adjacent U-shaped brackets. During construction, adjust the height of the horizontal baseline according to the height of the cooling pipes to make it consistent with the installation height of the cooling pipes. S6. Install clamps on the U-shaped bracket, place straight pipes on the L-shaped bracket, and clamp and fix the cooling pipes with U-shaped clamps and bolts; S7. Adjust the height of the clamp according to the height of the horizontal baseline so that the height of the straight pipe is consistent with the height of the horizontal baseline. S8. Install steel wire hoses between the ends of adjacent straight pipes to form a complete cooling circuit; S9. Temperature sensing element pre-embedding: Temperature sensing points are arranged at different depths of the concrete. The temperature sensors are tied and fixed to the steel mesh. The temperature sensing cables are led to the outside of the structure and connected to the temperature monitoring terminal to realize real-time monitoring of the internal and surface temperatures of the concrete. S10. After the concrete is poured, the water circulation system is turned on. Based on the real-time temperature data collected by the monitoring terminal, the flow rate of the cooling water is dynamically adjusted through the flow regulating valve on the main water inlet pipe to accurately control the temperature difference between the inside and outside of the concrete until the heat of hydration of the concrete tends to stabilize, thus completing the temperature measurement and crack prevention construction of large-volume concrete.

[0010] The positive and beneficial effects of this invention are: 1. The cooling pipe of the present invention is composed of a straight pipe and a steel wire hose. When in use, the straight pipe ensures the overall pressure and deformation resistance of the pipeline, while the flexibility of the steel wire hose compensates for the installation position deviation, effectively reducing the difficulty of pipe connection, overcoming the defects of traditional rigid steel pipes such as difficulty in alignment and easy leakage, and improving the operational stability of the water circulation system.

[0011] 2. The pipe connector of the present invention consists of a clamp, an L-shaped bracket and a U-shaped clamp. By setting a rubber pad on the inside of the clamp, the cooling pipe can be double locked and limited during use. The rubber pad increases the friction and plays a buffering and protective role, which can resist the side pressure of concrete pouring and vibration disturbance, overcome the problem of cooling pipe floating and displacement, and ensure the stability of the cooling circuit layout.

[0012] 3. This invention forms a grid positioning system by setting reference ropes between corresponding base rod components. During use, the installation points of the U-shaped brackets can be uniformly marked with horizontal and vertical reference lines. At the same time, the elevation of the cooling pipes can be accurately calibrated, ensuring that the pipe spacing is uniform and the entire system is at the same level. This overcomes the shortcomings of traditional manual pipe laying based on experience, which results in poor accuracy and inconsistent heights, and significantly improves the standardization of construction and the uniformity of cooling. In addition, by pre-embedding temperature measuring elements in the steel mesh, the internal and surface temperatures of the concrete can be monitored in real time. Based on the measured temperature data, the cooling water flow rate can be dynamically adjusted to achieve closed-loop control of temperature monitoring and water circulation cooling. This accurately controls the temperature difference between the inside and outside of the concrete, suppressing the generation of temperature cracks from the root, and perfectly meeting the integrated construction needs of temperature measurement and crack prevention for large-volume concrete. Attached image description: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pipe connector of the present invention; Figure 3 This is a distribution diagram of the base rod assembly of the present invention; Among them: 1-steel mesh, 2-support block, 3-pipe support, 4-cooling pipe, 401-straight pipe, 5-steel wire hose, 6-clamp, 7-L-shaped support, 8-U-shaped clamp, 9-rubber pad, 10-base, 11-vertical rod, 12-displacement sleeve, 13-positioning ring, 14-baseline rope. Detailed implementation method: The invention will be further explained and described below with reference to the accompanying drawings: Example 1, see Figures 1-3 A large-volume concrete temperature measurement and crack prevention device includes a steel mesh 1, pipe supports 3, and cooling pipes 4 set on the bottom surface of a foundation. The steel mesh 1 is supported above the bottom surface of the foundation by support blocks 2. At least two rows of support components are spaced apart on the steel mesh 1. Each row of support components consists of at least two U-shaped supports 3. Cooling pipes 4 are provided between adjacent support components. The cooling pipes 4 consist of straight pipes 401 and steel wire hoses 5. The straight pipes 401 are connected to the U-shaped supports 3 through pipe connectors. The ends of adjacent straight pipes 401 are connected to each other through steel wire hoses 5 to form a serpentine loop. One end of the cooling pipe 4 is a water inlet, and the other end is a water outlet. The water inlet is connected to a water supply pump body, and the water outlet is connected to a return water pipe. The return water pipe is connected to a cooling water source to form a circulation loop.

[0013] The pipe connector consists of a clamp 6, an L-shaped bracket 7, and a U-shaped clamp 8. The clamp 6 is composed of two arc-shaped plates with a rubber pad 9 on the inner wall of the arc-shaped plates. The arc-shaped plates are fixedly connected to the U-shaped bracket 3 by bolts. The L-shaped bracket 7 is provided on the outer wall of the clamp 6. The U-shaped clamp 8 passes through the L-shaped bracket 7 and a matching nut is threaded to the end of the L-shaped bracket 7, thereby fixing the cooling pipe 4 to the L-shaped bracket 7.

[0014] The circulation loop includes a cooling water tank, a water supply pump body, an inlet main pipe, and a return main pipe; the inlet end of the cooling pipe 4 is connected to the inlet main pipe through an inlet branch pipe, and the outlet end is connected to the return main pipe through an outlet branch pipe; a flow regulating valve is installed on the inlet main pipe, and the end of the return main pipe is connected to the cooling water tank; the water supply pump body sends the cooling water in the cooling water tank into the inlet main pipe.

[0015] Supports are provided at both ends of the bottom of the U-shaped bracket 3. The supports are fixedly connected to 1 by binding or welding. The support block 2 is a concrete pad with a height of 30-50mm.

[0016] Example 2, the construction method of the above-mentioned large-volume concrete temperature measurement and crack prevention device includes the following steps: S1. Determine the total length of cooling pipe 4 according to the base size, cut straight pipe 401, and prepare steel wire hose 5 and pipe connectors. S2. Taking the upper side of the reinforcing mesh 1 as side A, the lower side as side B, the left side as side C, and the right side as side D, according to the longitudinal distribution spacing of the U-shaped bracket 3, the first base rod assembly is set on the outer side of the reinforcing mesh A and B respectively; according to the transverse distribution spacing of the U-shaped bracket 3, the second base rod assembly is set on the outer side of the reinforcing mesh C and D respectively; wherein: the first base rod assembly and the second base rod assembly have the same structure, both consisting of a base 10, a vertical rod 11 and a displacement sleeve 12. The base 10 is fixedly connected to the ground by a positioning pin 101, and a positioning cylinder is provided on the base 10. The vertical rod 11 is provided inside the positioning cylinder and is fixed by bolts on the outer wall of the vertical rod 11. The displacement sleeve 12 is slidably connected to the vertical rod 11 and is fixed by bolts on one side of the outer wall of the displacement sleeve; a positioning ring 13 is provided on the other side of the outer wall of the displacement sleeve 12; S3. Set a reference rope 14 between the base rod assemblies of side A and side B as a transverse reference line, and set a reference rope 14 between the base rod assemblies of side C and side D as a longitudinal reference line. S4. Arrange the U-shaped bracket 3 according to the position of the intersection of the horizontal and vertical baselines; After S5 and U-shaped brackets 3 are arranged, coolant pipes 4 are installed between adjacent U-shaped brackets 3. During construction, the height of the horizontal reference line is adjusted according to the height of the coolant pipes 4 so that it is consistent with the installation height of the coolant pipes 4. S6. Install clamps 6 on the U-shaped bracket 3, place straight pipe 401 on the L-shaped bracket 7, and clamp and fix the cooling pipe 4 with U-shaped clamps 8 and bolts. S7. Adjust the height of clamp 6 according to the height of the horizontal baseline so that the height of straight pipe 401 is consistent with the height of the horizontal baseline. S8. Install steel wire hoses 5 between the ends of adjacent straight pipes 401 to form a complete cooling circuit; S9. Temperature sensing element pre-embedding: Temperature sensing points are arranged at different depths of the concrete. The temperature sensors are tied and fixed to the steel mesh. The temperature sensing cables are led to the outside of the structure and connected to the temperature monitoring terminal to realize real-time monitoring of the internal and surface temperatures of the concrete. S10. After the concrete is poured, the water circulation system is turned on. Based on the real-time temperature data collected by the monitoring terminal, the flow rate of the cooling water is dynamically adjusted through the flow regulating valve on the main water inlet pipe to accurately control the temperature difference between the inside and outside of the concrete until the heat of hydration of the concrete tends to stabilize, thus completing the temperature measurement and crack prevention construction of large-volume concrete.

[0017] In the above description, DN50 seamless steel pipes are used as straight pipes for the cooling pipes. The ends of adjacent straight pipes are flexibly connected by steel wire hoses of the same specification to form a continuous serpentine cooling loop. The entire cooling pipe is buried to the center of the raft slab thickness to ensure full contact with the concentrated area of ​​hydration heat. The pipe fittings adopt a double arc plate clamp structure. The inner wall of the clamp is pasted with a 5mm thick rubber pad with anti-slip texture. An L-shaped bracket is welded and fixed on the outside of the clamp. After the straight pipe is placed on the L-shaped bracket, it is locked and fixed by U-shaped clamps and end nuts to form a double limiting structure.

[0018] Working principle: First, a crisscrossing grid positioning reference is formed by the base rod assembly and the reference rope. This is used to uniformly mark the installation position of each U-shaped bracket and accurately position the buried elevation of the cooling pipe. This ensures that the spacing between all U-shaped brackets is consistent and the cooling pipes are at the same level, providing a reliable reference for subsequent standardized pipe laying.

[0019] The steel mesh is suspended by concrete blocks to meet the thickness requirements of the bottom protective layer. U-shaped supports are fixed to the steel mesh, and pipe connectors consisting of clamps, L-shaped supports and U-shaped clamps are used to double-lock and fix the straight pipe. The rubber pad on the inside of the clamp can increase friction, buffer and reduce shock, effectively resist the side pressure of concrete and vibration disturbance, and prevent the pipe from shifting or floating.

[0020] The cooling pipe adopts a combination structure of rigid straight pipe and steel wire hose. Adjacent straight pipes are flexibly connected by steel wire hose to form a serpentine loop. The straight pipes ensure structural strength, while the hoses are used to adapt to installation deviations and ensure reliable sealing of the loop connection.

[0021] Temperature sensing elements are pre-embedded at different depths around the cooling pipes. These elements are connected to an external monitoring terminal to collect real-time temperature data of the concrete's interior and surface. During the construction and curing phase, the water supply pump delivers cooling water from the cooling water tank into the cooling pipe loop via the main inlet pipe and branch inlet pipes. As the cooling water flows through the pipes, it continuously carries away the heat of hydration accumulated inside the concrete. The returned water, after absorbing heat, flows back to the cooling water tank via the outlet branch pipe and returns to the main return pipe. After cooling down, it is recycled again, forming a closed-loop system. Combined with real-time temperature data from the monitoring terminal, the flow rate of the cooling water is dynamically adjusted through a flow regulating valve to achieve temperature measurement and water control linkage, precisely controlling the temperature difference between the inside and outside of the concrete.

[0022] This invention establishes a grid positioning system by setting up a base rod assembly and a reference rope. Combined with U-shaped supports, combined cooling pipes, special pipe connectors, and a closed-loop water circulation system, it can accurately locate the layout of the U-shaped supports during actual construction by using longitudinal and transverse reference lines. At the same time, it can uniformly calibrate the installation elevation of the cooling pipes, ensuring that the cooling pipes are all at the same level. This effectively overcomes the problems of uneven spacing, misalignment, and poor positioning accuracy that exist in traditional large-volume concrete cooling pipe layouts that rely on manual experience, and significantly improves the standardization of pipe layout. Meanwhile, the combined structure of rigid straight pipe and flexible steel wire hose can adapt to complex working conditions such as deviations in rebar arrangement and uneven base surfaces on construction sites, reducing the difficulty of pipe connection and improving joint sealing. Multiple limiting protections are formed for the pipes through clamps, L-shaped supports, and U-shaped clamps in conjunction with rubber pads, which can resist the impact of concrete pouring and vibration, as well as lateral pressure, preventing pipe floating and deformation, and ensuring long-term stability of the cooling circuit. Pre-embedded temperature measuring elements can monitor changes in the internal temperature of the concrete in real time. Combined with a closed-loop circulation system with a flow regulating valve, the cooling water flow can be dynamically adjusted according to the measured temperature, achieving linkage control between temperature measurement and cooling. This precisely controls the temperature difference between the inside and outside of the structure, ensuring the temperature control and crack prevention effect of large-volume concrete from multiple aspects such as structural layout, fixing and protection, and temperature control regulation. The overall structure is reliable, construction is convenient, reducing construction difficulty and improving work efficiency.

Claims

1. A large-volume concrete temperature measurement and crack prevention device, comprising a steel mesh (1), a pipe support (3), and a cooling pipe (4) set on the foundation bottom surface, characterized in that: The steel mesh (1) is erected above the foundation bottom surface by means of support blocks (2). At least two rows of support components are provided on the steel mesh (1) at intervals. Each row of support components consists of at least two U-shaped brackets (3). A cooling pipe (4) is provided between adjacent support components. The cooling pipe (4) consists of a straight pipe (401) and a steel wire hose (5). The straight pipe (401) is connected to the U-shaped bracket (3) through a pipe connector. The ends of adjacent straight pipes (401) are connected to each other through the steel wire hose (5) to form a serpentine loop. One end of the cooling pipe (4) is the water inlet end and the other end is the water outlet end. The water inlet end is connected to the water supply pump body, and the water outlet end is connected to the return water pipeline. The return water pipeline is connected to the cooling water source to form a circulation loop.

2. The large-volume concrete temperature measurement and crack prevention device according to claim 1, characterized in that: The pipe connector consists of a clamp (6), an L-shaped bracket (7), and a U-shaped clamp (8). The clamp (6) consists of two arc-shaped plates. The inner wall of the arc-shaped plate is provided with a rubber pad (9). The arc-shaped plate is fixedly connected to the U-shaped bracket (3) by bolts. The outer wall of the clamp (6) is provided with an L-shaped bracket (7). The U-shaped clamp (8) passes through the L-shaped bracket (7) and a matching nut is threaded to the end of the L-shaped bracket (7), thereby fixing the cooling pipe (4) to the L-shaped bracket (7).

3. The large-volume concrete temperature measurement and crack prevention device according to claim 1, characterized in that: The circulation loop includes a cooling water tank, a water supply pump body, an inlet main pipe and a return main pipe; the inlet end of the cooling pipe (4) is connected to the inlet main pipe through an inlet branch pipe, and the outlet end is connected to the return main pipe through an outlet branch pipe; the inlet main pipe is equipped with a flow regulating valve, the end of the return main pipe is connected to the cooling water tank, and the water supply pump body sends the cooling water in the cooling water tank into the inlet main pipe.

4. The large-volume concrete temperature measurement and crack prevention device according to claim 1, characterized in that: The bottom of the U-shaped bracket (3) is provided with supports at both ends, and the supports are fixedly connected to (1) by binding or welding; the support block (2) is a concrete pad block with a height of 30-50mm.

5. A construction method for a large-volume concrete temperature measurement and crack prevention device according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Determine the total length of the cooling pipe (4) according to the base size, cut the straight pipe (401), and prepare the steel wire hose (5) and pipe connectors; S2. Taking the upper side of the steel mesh (1) as side A, the lower side as side B, the left side as side C, and the right side as side D, according to the longitudinal distribution spacing of the U-shaped bracket (3), the first base rod assembly is set on the outer side of the steel mesh A and B respectively; according to the transverse distribution spacing of the U-shaped bracket (3), the second base rod assembly is set on the outer side of the steel mesh (1) C and D respectively; wherein: the first base rod assembly and the second base rod assembly have the same structure, both consisting of a base (10), a vertical rod (11) and a displacement sleeve (12). The base (10) is fixedly connected to the ground by a positioning pin (101), and a positioning cylinder is provided on the base (10). The positioning cylinder is provided with a vertical rod (11), which is fixed by bolts on the outer wall of the vertical rod (11). The displacement sleeve (12) is slidably connected on the vertical rod (11) and fixed by bolts on one side of the outer wall of the displacement sleeve; a positioning ring (13) is provided on the other side of the outer wall of the displacement sleeve (12). S3. A reference rope (14) is set between the base rod assemblies of side A and side B as a transverse reference line, and a reference rope (14) is set between the base rod assemblies of side C and side D as a longitudinal reference line. S4. Arrange the U-shaped bracket (3) according to the position of the intersection of the horizontal and vertical baselines; S5. After the U-shaped brackets (3) are arranged, cool pipes (4) are installed between adjacent U-shaped brackets (3). During construction, the height of the horizontal reference line is adjusted according to the height of the cool pipes (4) so ​​that it is consistent with the installation height of the cool pipes (4). S6. Install clamps (6) on the U-shaped bracket (3), place straight pipe (401) on the L-shaped bracket (7), and clamp and fix the cooling pipe (4) with U-shaped clamps (8) and bolts; S7. Adjust the height of the clamp (6) according to the height of the horizontal baseline so that the height of the straight pipe (401) is consistent with the height of the horizontal baseline. S8. Install steel wire hoses (5) between the ends of adjacent straight pipes (401) to form a complete cooling circuit; S9. Temperature sensing element pre-embedding: Temperature sensing points are arranged at different depths in the concrete. Temperature sensors are tied and fixed to the steel mesh. Temperature sensing cables are led to the outside of the structure and connected to the temperature monitoring terminal to realize real-time monitoring of the internal and surface temperatures of the concrete. S10. After the concrete is poured, the water circulation system is turned on. Based on the real-time temperature data collected by the monitoring terminal, the flow rate of the cooling water is dynamically adjusted through the flow regulating valve on the main water inlet pipe to accurately control the temperature difference between the inside and outside of the concrete until the heat of hydration of the concrete tends to stabilize, thus completing the temperature measurement and crack prevention construction of large-volume concrete.

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