Cement concrete bridge deck pavement dripping seepage curing system and construction method thereof

Abstract

The invention relates to the technical field of bridge deck drip-infiltration curing construction, in particular to a cement concrete bridge deck pavement drip-infiltration curing system and a construction method thereof.The cement concrete bridge deck pavement drip-infiltration curing system comprises a water source supply system, a filtering system, a main pipeline, branch pipes, drip irrigation belts, a control system and an anti-evaporation material; the water source supply system comprises a water source and a water supply pump, the filtering system is used for removing impurities in water, the main pipeline is used for being connected with the water storage device, the water is conveyed to all areas of a bridge deck through the branch pipe system, and the drip irrigation belt is responsible for evenly distributing the water to the pavement surface of the bridge deck. The control system comprises a controller, a water pressure regulator and various sensors and is used for controlling operation of the system, and the anti-evaporation material adopts a two-cloth and one-film material and is composed of two layers of waterproof geotechnical cloth and a layer of impermeable film. By accurately controlling water supply, a remarkable water-saving effect is achieved, and meanwhile uniform maintenance of bridge deck pavement is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge deck drip curing construction, and in particular to a cement concrete bridge deck pavement drip curing system and a construction method thereof. Background Art

[0002] As a key process for protecting bridge structures, preventing moisture and corrosive substances from corroding concrete, and providing safe driving conditions, the importance of bridge deck pavement cannot be ignored. However, the construction quality of bridge deck pavement is closely related to the quality of curing. In the windy areas of Hexi, coupled with drought and water shortage, traditional bridge deck pavement curing methods, such as covering with polyethylene film, geotextile and artificial sprinkling, can ensure the quality of curing to a certain extent, but due to its large water consumption, high labor intensity and uneven curing effect, it leads to significant waste of water resources. This method is particularly unacceptable in water-scarce environments. Therefore, a more efficient curing technology is urgently needed to solve these problems. Summary of the invention

[0003] The object of the present invention is to provide a cement concrete bridge deck pavement drip curing system and a construction method thereof in view of the above problems.

[0004] In order to achieve the above purpose, the technical solutions provided are as follows:

[0005] A cement concrete bridge deck pavement drip seepage curing system, characterized in that it includes a water supply system, a filtration system, a main pipe and branch pipes, a drip irrigation belt, a control system and an evaporation-proof material; the water supply system includes a water source and a water supply pump, the filtration system is used to remove impurities in the water, the main pipe is used to connect a water storage device and transport water to various areas of the bridge deck through a branch pipe system, the drip irrigation belt is responsible for evenly distributing water to the bridge deck pavement surface, the control system includes a controller, a water pressure regulator and various sensors for controlling the operation of the system, and the evaporation-proof material adopts a "two-cloth and one-membrane" material, which is composed of two layers of waterproof geotextile and one layer of anti-seepage membrane.

[0006] A construction method for a cement concrete bridge deck pavement drip curing system, characterized in that it comprises the following steps:

[0007] Step 1: System installation and operation monitoring, including the following steps:

[0008] (1) Construction preparation

[0009] Before installing the drip infiltration system, the construction site must be thoroughly cleaned. After cleaning, the permeable geotextile surface should be clean and flat. Then, the staff needs to make precise marks on the bridge deck according to the design drawings, marking the installation locations of the components of the drip infiltration system, including the main pipeline, branch pipes, and water storage equipment installation locations.

[0010] (2) Preparation of tools and equipment

[0011] The installation of the drip infiltration health system requires a variety of professional tools and equipment. Before the formal installation begins, it is necessary to ensure that all necessary tools and equipment are ready. Each tool should be checked for its functional status to ensure that they are in good working condition. Check the power supply and temporary water facilities at the construction site in advance. It is necessary to ensure that there are sufficient power interfaces and stable power supply. If the power supply on site is insufficient, temporary power supply equipment may need to be arranged. During the installation and testing process, a large amount of water is required to flush the pipes, test the system pressure, etc. Therefore, it is necessary to ensure that there is a reliable water supply on site and prepare the necessary water pipes and connection equipment;

[0012] Step 2: Water source system installation, including the following steps:

[0013] (1) Water source access

[0014] The water source system is the starting point of the entire drip infiltration system, and its installation quality directly affects the performance of the entire system. According to the specific requirements of the geographical location of the bridge, you can choose to connect to the municipal water supply or set up a self-supplied water source. If you choose to connect to the municipal water supply, you need to understand the situation of the local water supply network and determine the best access point. During the access process, you need to comply with relevant laws and regulations and technical standards to ensure the legality and safety of the connection. If you choose to provide your own water source, such as groundwater or surface water, you need to consider the stability and water quality of the water source. Water quality testing may be required, and based on the test results, it will be decided whether additional water treatment equipment is needed;

[0015] Since the bridge is located in a water-scarce area on the plateau, this method chooses to dig a collection well under the bridge, provide a high-performance, pollution-free and environmentally friendly water storage tank, pump water into the water storage tank, and install a water meter and a main valve; the water meter is used to accurately measure the water consumption, which is very important for subsequent system operation analysis and cost control, and the main valve is used to control the water supply of the entire system, and can quickly cut off the water source in an emergency.

[0016] (2) Installation of main water supply pipeline

[0017] The installation of the main water supply pipeline is a key link in connecting the water source and the drip infiltration system. The connection between the main water supply pipeline and the water storage system and the main drip infiltration zone is another link that requires special attention. It needs to be carried out in accordance with standard operating procedures to ensure that each connection point is firm and reliable. After the connection is completed, a strict sealing test is required to ensure that there are no leaks.

[0018] Step 3: Installation of the drip filtration system, including the following steps:

[0019] To ensure the cleanliness of the water supply, a secondary filter device needs to be installed. The primary and secondary selection of the filter device needs to be determined according to the water quality of the water source and the requirements of the drip infiltration system. Since the water source of the water storage system is not uniform and will produce precipitated gravel, silt and aquatic plant debris after a long period of standing, in order to prevent clogging of the pipeline, a primary filter device is installed between the water storage system and the main water supply pipe to ensure the cleanliness of the water source from the water storage system to the main water supply pipe. The secondary filter device should be installed between the branch pipe drip infiltration belt and the main water supply pipe to perform a second filtration on the water flow of the drip infiltration system operation to ensure the cleanliness of the water source.

[0020] After the filtration system is installed, it needs to be fully debugged. The debugging process includes checking the filtration effect, testing the anti-clogging effect, adjusting the filtration accuracy, etc. Only by ensuring that the filtration system can operate normally can the long-term stable operation of the entire drip infiltration system be guaranteed.

[0021] Step 4: Laying of drip pipe network, including the following steps:

[0022] (1) Installation of main drip strip

[0023] The main drip tape is the aorta of the drip system, and its installation quality directly affects the performance of the entire system. According to the design drawings, during the laying process, special attention should be paid to the slope and direction of the main pipeline to conform to the longitudinal slope of the bridge. A reasonable slope can help empty the air in the pipeline and prevent the occurrence of air blockage.

[0024] Pipe material selection: The selection needs to be based on factors such as the health environment, water system pressure, and service life requirements.

[0025] Pipe diameter determination: Based on the design flow and pressure loss calculations, the diameter of the main drip zone is determined to be 10 cm to ensure that it can meet the water supply needs of the entire system.

[0026] Slope control: The main drip zone pipeline should be laid out in accordance with the longitudinal slope of the bridge to facilitate exhaust and drainage.

[0027] Fixed support: Pipe supports need to be set up at appropriate locations to prevent the pipeline from changing its laying position due to its own weight or water flow impact, causing the slope of the main drip zone to change and affecting the normal operation of the drip system.

[0028] It is necessary to install regional control valves on the main drip zone pipeline to control the water supply to different areas and reasonably adjust the water flow in each branch pipeline.

[0029] (2) Arrangement of branch pipe drip zone

[0030] The branch pipe drip zone is connected to the main drip zone through a connector, and its layout directly affects the uniformity of drip infiltration. The layout of the branch pipe needs to follow the following principles:

[0031] Uniform spacing: The spacing between branch pipes should be consistent according to the design requirements. Usually, one branch pipe is arranged every 0.5 meters along the longitudinal direction of the bridge deck, and should be arranged as parallel as possible in the longitudinal slope direction to ensure uniform water pressure distribution and maintain consistent water flow.

[0032] Slope control: During the laying process, special attention should be paid to the slope and direction of the branch pipe drip zone to conform to the transverse slope of the bridge. A reasonable slope can help empty the air in the pipeline and prevent the occurrence of air blockage.

[0033] Connection control: At the connection between the branch pipe drip zone and the main drip zone, a water flow control valve can be installed as needed to control the water supply of a single branch pipe drip zone, and to reasonably adjust the water flow of a single branch pipe drip zone. In the subsequent pressure test, if leakage occurs, the valve can be directly closed to cut off the water flow. The installation position of these valves needs to be convenient for operation and maintenance.

[0034] Step 5: Test and adjust the drip infiltration system operation, including the following steps:

[0035] (1) Pipeline network water pressure test

[0036] The water pressure test of the pipe network is a key step to ensure the reliable operation of the entire drip infiltration system. This process usually includes the following steps:

[0037] Pipeline filling: Open the main control valve of the water storage system. The first step is to slowly and evenly fill the entire pipe network with water to gradually expel the air in the pipe. This process takes a long time. The purpose of slow and even water filling is to avoid pipe rupture caused by the water hammer effect caused by rapid water filling.

[0038] Pressure test: After the pipe is filled with water, the system pressure can be gradually increased and maintained for a certain period of time (usually 30 minutes to 1 hour). During this period, a dedicated person is required to carefully check whether there is any leakage in the entire drip infiltration system, especially the location of each connection point.

[0039] Leakage treatment: If a leak is found, mark the location and quickly close the main drip zone control valve and the branch drip zone water flow control valve, and repair it after reducing pressure. After the repair is completed, retesting is required.

[0040] Put into use: After the test is completed, adjust it to normal water supply status and put it into use.

[0041] (2) Drip penetration uniformity test results

[0042] The uniformity of dripping directly affects the curing effect, so detailed testing is required. The testing steps include:

[0043] Select sampling points: Select multiple representative test points on the bridge deck. Usually, sampling is carried out near the middle of the dripping zone between two branches to ensure the representativeness and reliability of the data. This strategy can effectively reflect the uniformity of the dripping of the entire system.

[0044] Measuring flow rate: placing a collection device at each test point to collect the amount of dripping water obtained within the same period of time. This time can directly reflect the real data of the dripping water volume at different locations, and can also determine to a certain extent whether the location of the dripping belt is reasonable or damaged.

[0045] Data analysis: Multiple experiments can be conducted on the dripping point at the same location, and the dripping flow rate of each experimental point can be calculated, and the coefficient of variation of the flow rate can be analyzed. The coefficient of variation is usually required to be no more than 10%.

[0046] Adjustment and optimization: If it is found that the drip volume in certain areas is obviously too low or too high, it is necessary to check the corresponding drip system and make necessary adjustments or replacements to the drip tape or control valve according to the specific situation.

[0047] Step 6: Optimization and determination of the operating parameters of the drip infiltration system, specifically including the following steps:

[0048] (1) Parameter setting

[0049] Before the drip infiltration system is put into use, parameters need to be set and adjusted according to different environmental conditions to achieve the best maintenance effect.

[0050] First, the setting of drip frequency is a dynamic process that needs to be adjusted according to the age of the concrete and environmental conditions. In the early stages of concrete pouring, due to the strong hydration reaction, more frequent dripping is required to maintain appropriate humidity. As the concrete gradually hardens, the drip frequency can be gradually reduced. At the same time, environmental factors such as temperature, humidity and wind speed need to be considered. In hot and dry weather, the drip frequency may need to be increased.

[0051] The duration of the dripping process also requires fine tuning. This parameter depends primarily on the area of ​​the bridge deck and the local evaporation rate. Larger bridge decks may require longer dripping times to ensure full coverage. In areas with high evaporation rates, the dripping time may need to be extended to replenish water losses. In addition, the water absorption properties of the concrete must be considered to ensure that each drip can fully penetrate but not cause excess water.

[0052] (2) Operation observation

[0053] Close observation during the initial operation of the system is essential to detect and resolve problems in a timely manner. This phase requires comprehensive and detailed monitoring.

[0054] First, the operating status of key system components should be continuously recorded. The switch status of the valve, whether it can accurately respond to the control signal; the working condition of the drip tape, whether there is blockage or leakage. These records can help to detect potential equipment problems early.

[0055] Secondly, pay close attention to the moisture distribution on the bridge deck. Ideally, the entire bridge deck should be evenly moist. Pay special attention to whether there are obvious dry areas or waterlogged areas. Dry areas may mean that there is insufficient dripping, and the control valve in the corresponding area needs to be adjusted to increase the water flow; while waterlogged areas may indicate that local drainage is poor or dripping is excessive, and the control valve needs to be adjusted to reduce the water flow.

[0056] (3) Parameter Optimization

[0057] The results of the normal operation of the drip system can be observed and summarized on a daily basis, and the system parameters can be adjusted. If it is observed that certain areas of the bridge deck are too dry, it may be necessary to increase the drip frequency or extend the drip time in that area. Conversely, if water accumulation is found, it may be necessary to reduce the drip volume or increase the drip interval. These adjustments require nuances and may require different parameter settings for different areas.

[0058] Optimization of control logic is the key to improving system responsiveness and accuracy. If you find that the system's response to environmental changes is not timely or accurate enough, you may need to adjust the control algorithm.

[0059] Step 7: Covering with "two cloths and one film" waterproof geotextile, specifically including the following steps:

[0060] (1) Preliminary preparation

[0061] Before laying, check the setting of the dripping system to ensure uniform water supply and moderate flow, so as to prepare for the subsequent covering work. Clean the construction site thoroughly to ensure that there is no debris, dust or cement residue on the bridge deck. Good surface conditions are the basis for ensuring the effective adhesion of waterproof materials, so as to avoid debris affecting the sealing of the waterproof layer, causing water evaporation and wasting water resources.

[0062] (2) Laying process

[0063] Lay the "two cloths and one film" waterproof geotextile on top of the drip infiltration system to ensure that it fits the drip infiltration system tightly to prevent evaporation and leakage of water to the greatest extent. When laying, ensure that the waterproof geotextile is flat, without overlap or bubbles, and the edges should be neatly processed. Especially in the windy areas of Hexi, the fixation of the waterproof geotextile is particularly important. After fully covering the drip infiltration system, small sandbags are evenly placed on the surface of the waterproof geotextile to fix its position to prevent strong winds from blowing, affecting its anti-evaporation effect and causing waste of water resources.

[0064] (3) Notes

[0065] The overlap width between waterproof geotextiles should meet the specifications, usually 20-30 cm, to ensure sealing and effectiveness. During the laying process, pay attention to avoid wrinkles and bubbles, which will directly affect the waterproof effect and structural stability of the fabric. Reasonable laying can improve the moisture retention capacity of concrete during the curing period, ensure that it maintains appropriate humidity in a windy and dry environment, and effectively promote strength growth.

[0066] (4) Operation inspection

[0067] After the laying is completed, it is very important to regularly check the condition of the geotextile to prevent water evaporation, ensure normal water supply, no damage to the fabric, and make timely adjustments to adapt to environmental changes. In the windy areas of Hexi, the construction team should establish a regular inspection system to ensure the continuous supply of water during the curing period. Through scientific and reasonable management, water evaporation can be effectively reduced, water resources can be saved, the curing effect of the bridge deck can be guaranteed, and the strength and durability of the concrete can be promoted.

[0068] The process principle of the present invention is: the drip infiltration technology shows significant advantages in the curing of bridge deck pavement, and its principle is derived from agricultural drip irrigation technology. In the windy areas of Hexi, the high evaporation brings great challenges to the curing of bridge deck pavement. Traditional curing methods are difficult to meet the water demand, which easily causes water loss and uneven wetting. Therefore, the "two cloths and one film" waterproof geotextile technical measures can effectively reduce water evaporation, protect precious water resources, and combine with the drip infiltration system to further improve the curing effect. The drip infiltration technology achieves continuous and uniform water supply by installing a precisely controlled dripping device above the bridge deck pavement layer. This method ensures that the bridge deck pavement obtains sufficient and uniform water during the curing process, which helps to promote the hydration reaction of cement, thereby improving the strength and durability of the bridge deck pavement. This efficient moisture control ensures that the cement is evenly moistened during the curing process, thereby improving the hydration efficiency, reducing water loss, and making the curing process more economical and environmentally friendly. Combined with the "two cloths and one membrane" waterproof geotextile covering the bridge deck, the evaporation of water is further reduced, which can effectively isolate the influence of the external environment and provide strong protection for cement curing. It not only significantly improves the curing effect of cement concrete bridge deck pavement, enhances its strength and durability, but also effectively reduces water waste. This innovative comprehensive application shows great potential in the curing of modern bridge deck pavement, especially in the windy areas of Hexi with high evaporation.

[0069] Compared with the traditional bridge deck pavement curing method, the beneficial effects of the present invention are:

[0070] 1. Uniform moisture distribution: The drip infiltration system ensures that every part of the bridge deck pavement surface can obtain uniform moisture supply by precisely controlling the water volume and dripping position. This not only greatly improves the uniform distribution of moisture on the pavement surface, but also ensures the overall quality and performance of the concrete.

[0071] 2. High degree of automation: The drip infiltration system can automatically supply water according to the set time interval and water volume, greatly reducing the dependence on manual intervention, which not only improves work efficiency but also reduces labor costs.

[0072] 3. Save water resources: In the windy areas of Hexi, the maintenance of bridge deck pavement faces severe challenges due to the large amount of evaporation. The use of "two cloths and one membrane" waterproof geotextile to cover the bridge deck can significantly reduce the direct evaporation area of ​​water and reduce the amount of water required for maintenance. The membrane material has good thermal insulation properties, which can keep the water temperature stable and further reduce heat loss. In addition, the combination of cloth and membrane effectively resists the impact of strong winds, reduces the direct impact of wind speed on the water surface, and further reduces evaporation.

[0073] 4. Stable curing effect and strong adaptability: The drip infiltration system can be flexibly adjusted according to different bridge deck pavement types and environmental conditions to meet various curing needs. Continuous and uniform water supply can effectively promote the stable progress of cement hydration reaction. Whether in a dry high-temperature environment or a humid low-temperature environment, the drip infiltration system can be adjusted according to actual conditions to improve the consistency of the curing effect. This stable curing effect helps to improve the strength and durability of concrete and ensure the long-term performance of the bridge deck pavement.

[0074] In summary, the present invention achieves significant water-saving effects by precisely controlling the water supply, while ensuring uniform curing of the bridge deck pavement. The drip infiltration system can not only meet the needs of arid areas such as the Hexi Corridor, but also effectively reduce the waste of water resources, ensuring that cement obtains uniform and sufficient water during the curing process, thereby improving the quality and durability of the bridge deck pavement, and achieving the dual goals of water saving and efficient curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 It is a structural schematic diagram of the bridge deck pavement dripping curing system of the present invention;

[0076] Figure 2 This is a comparison chart of concrete strength under the same environment for 15 days in an embodiment of the present invention;

[0077] Figure 3 This is a comparison chart of concrete surface humidity under the same environment for 15 days in an embodiment of the present invention. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] Embodiment 1

[0080] A cement concrete bridge deck pavement drip seepage curing system, characterized in that it includes a water supply system, a filtration system, a main pipe and branch pipes, a drip irrigation belt, a control system and an evaporation-proof material; the water supply system includes a water source and a water supply pump, the filtration system is used to remove impurities in the water, the main pipe is used to connect a water storage device and transport water to various areas of the bridge deck through a branch pipe system, the drip irrigation belt is responsible for evenly distributing water to the bridge deck pavement surface, the control system includes a controller, a water pressure regulator and various sensors for controlling the operation of the system, and the evaporation-proof material adopts a "two-cloth and one-membrane" material, which is composed of two layers of waterproof geotextile and one layer of anti-seepage membrane.

[0081] A construction method for a cement concrete bridge deck pavement drip curing system, such as Figure 1 As shown, the following steps are included:

[0082] Step 1: System installation and operation monitoring, including the following steps:

[0083] (1) Construction preparation

[0084] Water supply system: includes water collection wells, water sources (such as tap water, water storage tanks) and water supply pumps.

[0085] Filtration system: mainly used to remove impurities in the water to prevent them from entering the drip infiltration system and causing blockage, affecting the normal operation of the health system.

[0086] Main pipes and branch pipes: The main pipe is connected to the water storage device and transports water to various areas of the bridge deck through the branch pipe system to ensure uniform water distribution.

[0087] Drip strip: responsible for evenly distributing water to the bridge deck pavement surface.

[0088] Control system: includes controller, water pressure regulator and various sensors, used to control the operation of the system.

[0089] Anti-evaporation material: "two cloths and one membrane" material is used, which consists of two layers of waterproof geotextiles and one layer of anti-seepage membrane, which can effectively prevent water evaporation and leakage, protect water resources and improve health effects.

[0090] Accessories: including various connectors, pressure regulators and other auxiliary equipment.

[0091] (2) Design points

[0092] When designing a bridge deck pavement drip curing system, the following key factors need to be considered:

[0093] Bridge deck area and shape: Design appropriate pipe layout and dripper distribution based on the specific size and shape of the bridge deck.

[0094] Water source conditions: Evaluate the water quality, pressure and flow of available water sources and select appropriate filtration and pressurization equipment.

[0095] Climate factors: Consider local temperature, humidity, wind speed and other factors to adjust the dripping frequency and water volume.

[0096] Characteristics of paving materials: Different paving materials have different water requirements, and the drip parameters need to be adjusted accordingly.

[0097] Curing cycle: Determine the appropriate curing cycle and intensity based on the characteristics of the paving material and environmental conditions.

[0098] (3) Selection and layout of drip zones

[0099] The drip zone is one of the most critical components of the system, and its selection and layout directly affect the curing effect. Generally speaking, the following points can be considered:

[0100] Drip tape type: Pressure-compensated embedded clip drip tape can be selected to ensure a stable drip volume under different water pressures.

[0101] Dripping volume: According to the water absorption performance and evaporation rate of the bridge deck pavement, select a branch drip strip with an appropriate flow rate. Usually the water volume is between 1-4 liters / hour.

[0102] Layout spacing: The spacing between the branches of the drip zone is usually between 50 cm and needs to be adjusted according to actual conditions to ensure uniform moisture coverage.

[0103] Installation height: The branch pipe of the dropper is connected to the main pipe through a joint and evenly covers the bridge deck pavement layer covered with geotextile. Through the water level difference pressure compensation of the water storage system, it is evenly arranged in accordance with the slope of the bridge deck to ensure that the water droplets can be evenly distributed without splashing.

[0104] (4) "Two cloths and one membrane" waterproof geotextile covering

[0105] After the drip infiltration system of the bridge deck is arranged, the "two cloths and one membrane" waterproof geotextile is laid on top of the drip infiltration system to ensure that it fits the drip infiltration system tightly to prevent evaporation and leakage of water to the greatest extent. Avoid affecting the subsequent anti-evaporation effect. The overlap width must meet the design specifications to avoid wrinkles and bubbles to ensure the integrity and stability of the covered area. Care should be taken during laying to ensure that the fabric is not damaged.

[0106] After the laying is completed, the drip system and waterproof geotextile should be checked regularly to ensure that the water supply is normal, the fabric is in good condition, and timely adjustments are made. This can ensure the best curing effect of the bridge deck and improve the strength and durability of the concrete.

[0107] (5) Preparation of tools and equipment

[0108] The installation of the drip infiltration health system requires a variety of professional tools and equipment. Before the formal installation begins, it is necessary to ensure that all necessary tools and equipment are ready. Each tool should be checked for its functional status to ensure that they are in good working condition. Check the power supply and temporary water facilities at the construction site in advance. It is necessary to ensure that there are sufficient power interfaces and stable power supply. If the power supply on site is insufficient, temporary power supply equipment may need to be arranged. During the installation and testing process, a large amount of water is required to flush the pipes, test the system pressure, etc. Therefore, it is necessary to ensure that there is a reliable water supply on site and prepare the necessary water pipes and connection equipment;

[0109] Step 2: Water source system installation, including the following steps:

[0110] (1) Water source access

[0111] The water source system is the starting point of the entire drip infiltration system, and its installation quality directly affects the performance of the entire system. According to the specific requirements of the geographical location of the bridge, you can choose to connect to the municipal water supply or set up a self-supplied water source. If you choose to connect to the municipal water supply, you need to understand the situation of the local water supply network and determine the best access point. During the access process, you need to comply with relevant laws and regulations and technical standards to ensure the legality and safety of the connection. If you choose to provide your own water source, such as groundwater or surface water, you need to consider the stability and water quality of the water source. Water quality testing may be required, and based on the test results, it will be decided whether additional water treatment equipment is needed;

[0112] Since the bridge is located in a water-scarce area on the plateau, this method chooses to dig a collection well under the bridge, provide a high-performance, pollution-free and environmentally friendly water storage tank, pump water into the water storage tank, and install a water meter and a main valve; the water meter is used to accurately measure the water consumption, which is very important for subsequent system operation analysis and cost control, and the main valve is used to control the water supply of the entire system, and can quickly cut off the water source in an emergency.

[0113] (2) Installation of main water supply pipeline

[0114] The installation of the main water supply pipeline is a key link in connecting the water source and the drip infiltration system. The connection between the main water supply pipeline and the water storage system and the main drip infiltration zone is another link that requires special attention. It needs to be carried out in accordance with standard operating procedures to ensure that each connection point is firm and reliable. After the connection is completed, a strict sealing test is required to ensure that there are no leaks.

[0115] Step 3: Installation of the drip filtration system, including the following steps:

[0116] To ensure the cleanliness of the water supply, a secondary filter device needs to be installed. The primary and secondary selection of the filter device needs to be determined according to the water quality of the water source and the requirements of the drip infiltration system. Since the water source of the water storage system is not uniform and will produce precipitated gravel, silt and aquatic plant debris after a long period of standing, in order to prevent clogging of the pipeline, a primary filter device is installed between the water storage system and the main water supply pipe to ensure the cleanliness of the water source from the water storage system to the main water supply pipe. The secondary filter device should be installed between the branch pipe drip infiltration belt and the main water supply pipe to perform a second filtration on the water flow of the drip infiltration system operation to ensure the cleanliness of the water source.

[0117] After the filtration system is installed, it needs to be fully debugged. The debugging process includes checking the filtration effect, testing the anti-clogging effect, adjusting the filtration accuracy, etc. Only by ensuring that the filtration system can operate normally can the long-term stable operation of the entire drip infiltration system be guaranteed.

[0118] Step 4: Laying of drip pipe network, including the following steps:

[0119] (1) Installation of main drip strip

[0120] The main drip tape is the aorta of the drip system, and its installation quality directly affects the performance of the entire system. According to the design drawings, during the laying process, special attention should be paid to the slope and direction of the main pipeline to conform to the longitudinal slope of the bridge. A reasonable slope can help empty the air in the pipeline and prevent the occurrence of air blockage.

[0121] Pipe material selection: The selection needs to be based on factors such as the health environment, water system pressure, and service life requirements.

[0122] Pipe diameter determination: Based on the design flow and pressure loss calculations, the diameter of the main drip zone is determined to be 10 cm to ensure that it can meet the water supply needs of the entire system.

[0123] Slope control: The main drip zone pipeline should be laid out in accordance with the longitudinal slope of the bridge to facilitate exhaust and drainage.

[0124] Fixed support: Pipe supports need to be set up at appropriate locations to prevent the pipeline from changing its laying position due to its own weight or water flow impact, causing the slope of the main drip zone to change and affecting the normal operation of the drip system.

[0125] It is necessary to install regional control valves on the main drip zone pipeline to control the water supply to different areas and reasonably adjust the water flow in each branch pipeline.

[0126] (2) Arrangement of branch pipe drip zone

[0127] The branch pipe drip zone is connected to the main drip zone through a connector, and its layout directly affects the uniformity of drip infiltration. The layout of the branch pipe needs to follow the following principles:

[0128] Uniform spacing: The spacing between branch pipes should be consistent according to the design requirements. Usually, one branch pipe is arranged every 0.5 meters along the longitudinal direction of the bridge deck, and should be arranged as parallel as possible in the longitudinal slope direction to ensure uniform water pressure distribution and maintain consistent water flow.

[0129] Slope control: During the laying process, special attention should be paid to the slope and direction of the branch pipe drip zone to conform to the transverse slope of the bridge. A reasonable slope can help empty the air in the pipeline and prevent the occurrence of air blockage.

[0130] Connection control: At the connection between the branch pipe drip zone and the main drip zone, a water flow control valve can be installed as needed to control the water supply of a single branch pipe drip zone, and to reasonably adjust the water flow of a single branch pipe drip zone. In the subsequent pressure test, if leakage occurs, the valve can be directly closed to cut off the water flow. The installation position of these valves needs to be convenient for operation and maintenance.

[0131] Step 5: Test and adjust the drip infiltration system operation, including the following steps:

[0132] (1) Pipeline network water pressure test

[0133] The water pressure test of the pipe network is a key step to ensure the reliable operation of the entire drip infiltration system. This process usually includes the following steps:

[0134] Pipeline filling: Open the main control valve of the water storage system. The first step is to slowly and evenly fill the entire pipe network with water to gradually expel the air in the pipe. This process takes a long time. The purpose of slow and even water filling is to avoid pipe rupture caused by the water hammer effect caused by rapid water filling.

[0135] Pressure test: After the pipe is filled with water, the system pressure can be gradually increased and maintained for a certain period of time (usually 30 minutes to 1 hour). During this period, a dedicated person is required to carefully check whether there is any leakage in the entire drip infiltration system, especially the location of each connection point.

[0136] Leakage treatment: If a leak is found, mark the location and quickly close the main drip zone control valve and the branch drip zone water flow control valve, and repair it after reducing pressure. After the repair is completed, retesting is required.

[0137] Put into use: After the test is completed, adjust it to normal water supply status and put it into use.

[0138] (2) Drip penetration uniformity test results

[0139] The uniformity of dripping directly affects the curing effect, so detailed testing is required. The testing steps include:

[0140] Select sampling points: Select multiple representative test points on the bridge deck. Usually, sampling is carried out near the middle of the dripping zone between two branches to ensure the representativeness and reliability of the data. This strategy can effectively reflect the uniformity of the dripping of the entire system.

[0141] Measuring flow rate: placing a collection device at each test point to collect the amount of dripping water obtained within the same period of time. This time can directly reflect the real data of the dripping water volume at different locations, and can also determine to a certain extent whether the location of the dripping belt is reasonable or damaged.

[0142] Data analysis: Multiple experiments can be conducted on the dripping point at the same location, and the dripping flow rate of each experimental point can be calculated, and the coefficient of variation of the flow rate can be analyzed. The coefficient of variation is usually required to be no more than 10%.

[0143] Adjustment and optimization: If it is found that the drip volume in certain areas is obviously too low or too high, it is necessary to check the corresponding drip system and make necessary adjustments or replacements to the drip tape or control valve according to the specific situation.

[0144] Step 6: Optimization and determination of the operating parameters of the drip infiltration system, specifically including the following steps:

[0145] (1) Parameter setting

[0146] Before the drip infiltration system is put into use, parameters need to be set and adjusted according to different environmental conditions to achieve the best maintenance effect.

[0147] First, the setting of drip frequency is a dynamic process that needs to be adjusted according to the age of the concrete and environmental conditions. In the early stages of concrete pouring, due to the strong hydration reaction, more frequent dripping is required to maintain appropriate humidity. As the concrete gradually hardens, the drip frequency can be gradually reduced. At the same time, environmental factors such as temperature, humidity and wind speed need to be considered. In hot and dry weather, the drip frequency may need to be increased.

[0148] The duration of the dripping process also requires fine tuning. This parameter depends primarily on the area of ​​the bridge deck and the local evaporation rate. Larger bridge decks may require longer dripping times to ensure full coverage. In areas with high evaporation rates, the dripping time may need to be extended to replenish water losses. In addition, the water absorption properties of the concrete must be considered to ensure that each drip can fully penetrate but not cause excess water.

[0149] (2) Operation observation

[0150] Close observation during the initial operation of the system is essential to detect and resolve problems in a timely manner. This phase requires comprehensive and detailed monitoring.

[0151] First, the operating status of key system components should be continuously recorded. The switch status of the valve, whether it can accurately respond to the control signal; the working condition of the drip tape, whether there is blockage or leakage. These records can help to detect potential equipment problems early.

[0152] Secondly, pay close attention to the moisture distribution on the bridge deck. Ideally, the entire bridge deck should be evenly moist. Pay special attention to whether there are obvious dry areas or waterlogged areas. Dry areas may mean that there is insufficient dripping, and the control valve in the corresponding area needs to be adjusted to increase the water flow; while waterlogged areas may indicate that local drainage is poor or dripping is excessive, and the control valve needs to be adjusted to reduce the water flow.

[0153] (3) Parameter Optimization

[0154] The results of the normal operation of the drip system can be observed and summarized on a daily basis, and the system parameters can be adjusted. If it is observed that certain areas of the bridge deck are too dry, it may be necessary to increase the drip frequency or extend the drip time in that area. Conversely, if water accumulation is found, it may be necessary to reduce the drip volume or increase the drip interval. These adjustments require nuances and may require different parameter settings for different areas.

[0155] Optimization of control logic is the key to improving system responsiveness and accuracy. If you find that the system's response to environmental changes is not timely or accurate enough, you may need to adjust the control algorithm.

[0156] Step 7: Covering with "two cloths and one film" waterproof geotextile, specifically including the following steps:

[0157] (1) Preliminary preparation

[0158] Before laying, check the setting of the dripping system to ensure uniform water supply and moderate flow, so as to prepare for the subsequent covering work. Clean the construction site thoroughly to ensure that there is no debris, dust or cement residue on the bridge deck. Good surface conditions are the basis for ensuring the effective adhesion of waterproof materials, so as to avoid debris affecting the sealing of the waterproof layer, causing water evaporation and wasting water resources.

[0159] (2) Laying process

[0160] Lay the "two cloths and one film" waterproof geotextile on top of the drip infiltration system to ensure that it fits the drip infiltration system tightly to prevent evaporation and leakage of water to the greatest extent. When laying, ensure that the waterproof geotextile is flat, without overlap or bubbles, and the edges should be neatly processed. Especially in the windy areas of Hexi, the fixation of the waterproof geotextile is particularly important. After fully covering the drip infiltration system, small sandbags are evenly placed on the surface of the waterproof geotextile to fix its position to prevent strong winds from blowing, affecting its anti-evaporation effect and causing waste of water resources.

[0161] (4) Notes

[0162] The overlap width between waterproof geotextiles should meet the specifications, usually 20-30 cm, to ensure sealing and effectiveness. During the laying process, pay attention to avoid wrinkles and bubbles, which will directly affect the waterproof effect and structural stability of the fabric. Reasonable laying can improve the moisture retention capacity of concrete during the curing period, ensure that it maintains appropriate humidity in a windy and dry environment, and effectively promote strength growth.

[0163] (4) Operation inspection

[0164] After the laying is completed, it is very important to regularly check the condition of the geotextile to prevent water evaporation, ensure normal water supply, no damage to the fabric, and make timely adjustments to adapt to environmental changes. In the windy areas of Hexi, the construction team should establish a regular inspection system to ensure the continuous supply of water during the curing period. Through scientific and reasonable management, water evaporation can be effectively reduced, water resources can be saved, the curing effect of the bridge deck can be guaranteed, and the strength and durability of the concrete can be promoted.

[0165] Step 8: Monitoring data, including the following steps:

[0166] (1) Environmental comparison

[0167] Under the same environment, natural factors such as temperature and weather also play an important role in concrete curing and are directly related to the strength development of concrete.

[0168] Under the same outdoor conditions, a two-link bridge deck pavement with drip curing and traditional artificial sprinkling curing was set as a control group. Concrete strength was monitored in the same fixed experimental area every 2 days, and the change in concrete strength after 15 days was plotted to analyze the superiority of different curing methods. Figure 2 It is not difficult to find out from the data analysis that this picture shows the comparison of the changes in the compressive strength of concrete under two different methods in the same environment for 15 days.

[0169] -The blue curve represents the compressive strength of “drip infiltration health care”.

[0170] -The orange curve represents the compressive strength of “traditional health care”.

[0171] - The vertical axis represents the compressive strength (unit: MPa), and the horizontal axis represents the number of days (1 to 15 days).

[0172] from Figure 2 It can be seen that:

[0173] ① In the initial stage (1 day) of drip infiltration treatment, the intensity was 26.1MPa, and reached 58.1MPa after 15 days, showing a strong growth.

[0174] The initial strength of traditional health care is 15.1MPa, which reaches 42.5MPa after 15 days, with a slower growth rate.

[0175] ②On the 10th day, the intensity of drip infiltration curing had reached 50MPa, while that of traditional curing was only 33.5MPa. Drip infiltration curing reached the standard intensity 5 days earlier than traditional curing. Drip infiltration curing showed a higher intensity growth rate throughout the whole process.

[0176] ③On the 15th day, the compressive strength of drip infiltration health care reached 58.1MPa, while that of traditional health care was only 42.5MPa. The compressive strength of drip infiltration health care was 15.6MPa greater than that of traditional health care, and the health care effect was obvious.

[0177] In summary:

[0178] -The drip curing method can significantly improve the compressive strength of concrete within 15 days, which has more significant advantages than traditional curing methods.

[0179] -Drip curing can improve the early strength of concrete more quickly and maintain a high strength growth rate throughout the process.

[0180] (2) Humidity monitoring

[0181] Humidity monitoring is one of the core indicators for evaluating the curing effect of the "two-cloth-one-film" waterproof geotextile. It can directly reflect that the curing of the two-cloth-one-film waterproof geotextile thatching dripping system can more effectively slow down the evaporation of water on the concrete surface compared with traditional curing methods.

[0182] Fixed-point monitoring is the most basic humidity monitoring method. During the time period of the day when the temperature is highest and the water evaporation rate is the highest, the concrete humidity is monitored in the same fixed experimental area, and the changes in the surface humidity of the concrete are plotted for 15 days to analyze the superiority of the two curing methods. These monitoring points should cover different areas of the bridge deck, including the central area, the edge area, and areas where special conditions may exist (such as direct sunlight or shadow areas). Fixed-point monitoring can provide long-term and continuous data, which is helpful for analyzing humidity change trends.

[0183] Figure 3 Shown is a comparison of the changes in surface humidity over 15 days using two different methods.

[0184] -The blue curve represents the humidity condition of “drip infiltration health care”.

[0185] -The orange curve represents the humidity condition of “traditional health care”.

[0186] - The vertical axis represents humidity value (%Rh), and the horizontal axis represents days (1 to 15 days).

[0187] As can be seen from the figure:

[0188] ① The humidity value of "drip infiltration health care" is relatively stable, all above 90%Rh, and the highest reaches 96%Rh.

[0189] ② The relative humidity of "traditional health care" is always maintained at around 55%, and a low humidity level is maintained throughout the entire health care cycle.

[0190] Overall, this picture clearly shows that under the same environment, the maintenance of the two-cloth and one-membrane waterproof geotextile thatched drip infiltration system can significantly reduce water evaporation, maintain a high and stable surface humidity, and save water resources; while traditional maintenance methods are prone to water loss and it is difficult to maintain ideal humidity conditions. Long-term maintenance will cause a lot of water resources Waste.

[0191] (3) Data summary

[0192] Concrete strength test is the most direct method to evaluate the curing effect, which reflects the actual impact of drip curing on concrete quality. From the comparative analysis of compressive strength, it can be seen that the drip curing method also has a significant effect on improving concrete strength. During the 15 days, the strength value of drip curing was always higher than that of traditional curing, and the rising rate was faster. By the 15th day, the strength of drip curing reached 58.1MPa, while that of traditional curing was only 42.5MPa, with a gap of 15.6MPa. This shows that drip curing not only provides faster strength growth in the early stages, but also maintains a higher strength level throughout the curing process.

[0193] First, from the perspective of surface humidity, the two-cloth-one-membrane waterproof geotextile thatch dripping system curing method was able to maintain a high and stable humidity level throughout the 15-day test period. The blue curve remained above 90%Rh for most of the time, and even reached 96%Rh on the 14th day. In contrast, the relative humidity of the "traditional curing" was always maintained at around 55%, and remained at a lower humidity level throughout the curing period.

[0194] Obviously, the two-cloth-one-film waterproof geotextile thatching dripping system curing method is significantly better than the traditional curing method in controlling surface humidity and preventing water evaporation, so that the material or product can better retain its inherent moisture and prevent cracking or other problems caused by water loss. However, the traditional curing method fails to effectively maintain high humidity, the surface humidity fluctuates greatly, and the water evaporates quickly, which may affect the overall quality of the material or product. Therefore, the two-cloth-one-film waterproof geotextile thatching dripping system curing method can effectively prevent water evaporation and save water resources in the windy area of ​​Hexi.

[0195] Example 2 Benefit Analysis

[0196] The use of the drip bridge deck pavement curing construction technology has greatly improved the quality and curing time of the bridge deck pavement, saved construction time, and created benefits for the project during the construction of the Jie'an project.

[0197] 1. Economic benefits

[0198] The use of drip-seepage bridge deck curing construction technology has the advantages of uniform water distribution, reduced water resource waste, labor saving, rapid concrete strength improvement, short curing cycle, high bridge deck pavement quality and obvious economic benefits. Take the Qingshagou bridge deck curing as an example:

[0199] 1.1 Material costs

[0200] The main materials used for the maintenance of dripping bridge decks are dripping tapes and water storage systems. Taking the 100-meter bridge deck pavement of the No. 1 bridge of the Kujie project as an example, the price of a 100-meter-long, 10-cm-diameter dripping tape is 200 yuan, and a roll of a 100-meter-long, 2-cm-diameter branch dripping tape is 50 yuan. The branch dripping tapes are arranged at a horizontal spacing of 50 cm, with a total of 33 groups, each group is 11.5 meters long, and a total of 3 rolls are purchased, totaling 150 yuan. The water storage tank with a size of 2*2*2 meters costs 300 yuan, a roll of a 6-meter-wide, 60-meter-long waterproof geotextile costs 600 yuan, and 3 rolls are purchased for 1,800 yuan. A roll of a 6-meter-wide, 60-meter-long permeable geotextile costs 300 yuan, and 3 rolls are purchased for 900 yuan. The cost of other parts is 100 yuan, and the total price is 3,450 yuan. As shown in Table 1:

[0201] Table 1 Cost of a set of dripping materials

[0202] Material Name Specification quantity Unit price (Yuan) Total price (yuan) 10cm diameter drip tape 100 meters 1 200 200 2cm diameter branch pipe dripping belt 100 meters 3 volumes 50 150 Water storage tank 2m*2m*2m 1 300 300 Waterproof geotextile 6 meters wide and 60 meters long 3 volumes 600 1800 Permeable geotextile 6 meters wide and 60 meters long 3 volumes 300 900 Other parts / / / 100 total / / / 3450

[0203] 1.2 Labor costs and equipment costs

[0204] Taking the 100-meter bridge deck paving of the No. 1 Bridge of the Kujie Project as an example, the current water fee is 3.7 yuan per ton, and the overall bridge deck maintenance period is 15 days.

[0205] The traditional bridge deck maintenance artificial sprinkling costs 200 yuan per person per day, with a total cost of 200*15=3000 yuan. Water costs: 20 tons of water per day, with a total cost of 3.7*20*15=1110 yuan. The water truck rental fee is 400 yuan per day, with a cost of 400*15=6000 yuan. The water truck driver's salary for 15 days is 3000 yuan. A roll of permeable geotextile material with a width of 6m and a length of 60m costs 300 yuan, and the purchase of 3 rolls costs 900 yuan.

[0206] The total labor cost for 15 days was 3,000 yuan, water cost was 1,110 yuan, equipment freight was 6,000 yuan, water truck driver salary was 3,000 yuan, and material cost was 900 yuan, with a total expenditure of 14,010 yuan.

[0207] The drip seepage bridge deck curing does not adopt artificial sprinkling. People are arranged to inspect the drip seepage system regularly every day to see if it is working properly. The salary is 2,000 yuan per month and 1,000 yuan per half month. The cost of ordering a set of materials is 3,450 yuan, and the water supply pump is 1,000 yuan per unit, so the total material cost is 4,450 yuan, which can be recycled. The water fee is 4 tons of water per day, 3.7*4*15=222 yuan. Every half month, the water truck will pull water and store it in the water well. The rental fee of the water truck is 400 yuan / day, and the salary of the water truck driver is 200 yuan / day, totaling 6,272 yuan, as shown in Table 2:

[0208] Table 2 Comparison of the cost of traditional curing and drip curing for 100m bridge deck pavement

[0209]

[0210] By comparison, the curing cost of 100 meters of bridge deck pavement can save 7738 yuan, and each meter of bridge deck pavement can save 7738 / 100=77.38 yuan / meter. The KJSG-2 contract section of the new reconstruction project of the G312 line from Kushui to Jiepai Village has a new bridge of 2585.2 meters. The use of cement concrete bridge deck pavement drip curing technology has saved a total cost of 77.38*2585.2=200,000 yuan.

[0211] 2. Environmental benefits

[0212] 2.1 Reduce water waste

[0213] Precisely control water usage: The drip infiltration system avoids the water waste common in traditional curing methods by precisely controlling the drip rate and moisture distribution. The drip infiltration system can adjust the water supply in real time according to the needs of concrete, ensuring that the concrete surface is always kept in the optimal wet state.

[0214] Prevent excessive water use: Traditional maintenance methods such as spraying water or covering with wet sacks can easily lead to excessive use of water and even waste of environmental water resources. The drip infiltration system can effectively control the amount of water and avoid this problem.

[0215] Save water resources: The "two cloths and one membrane" waterproof geotextile fits tightly on the drip infiltration system, which can effectively prevent water evaporation and leakage, save water resources and improve health effects.

[0216] Taking the 100-meter bridge deck curing of the No. 1 bridge of the Kujie project as an example, the traditional curing of the 100-meter bridge deck requires 20 tons of water, while the drip curing only uses 4 tons of water per 100 meters. If converted into the water consumption per linear meter of bridge deck curing, the traditional curing of the bridge deck uses 0.2 tons of water per linear meter, and the drip curing uses 0.04 tons of water per linear meter. The new bridge of the Kujie project is 2585.2 meters long, so the traditional curing of the bridge deck pavement uses about 517 tons of water per linear meter, and the drip curing uses 103 tons of water per linear meter, as shown in Table 3:

[0217] Table 3 Comparison of water resource conservation between traditional curing and drip curing for 100-meter bridge deck pavement

[0218] project Traditional health water volume (tons) Amount of drip water for health preservation (tons) Water resources saved (tons) Water consumption per 100 meters 20 4 16 Water consumption per linear meter 0.2 0.04 0.16 Total length of the new bridge (2585.2 meters) 517 103 414

[0219] By comparison, drip infiltration curing of 100 meters of bridge deck pavement can save 16 tons of water, and the Kujie project can save 414 tons of water.

[0220] 2.2 “Green” Energy Saving

[0221] Reduced energy consumption: The high efficiency of the drip system means that no additional energy or mechanical equipment is needed to keep the concrete moist during the curing process. Compared with traditional curing methods, the additional energy consumption required for the curing process is reduced.

[0222] Reduced carbon emissions during construction: Due to the increased efficiency of the maintenance process, carbon emissions during construction are also reduced. Especially in large-scale projects, reducing dependence on fossil fuels and other resources helps to reduce the overall carbon footprint of construction activities on the environment.

[0223] 3. Social benefits

[0224] The drip curing technology for cement concrete bridge deck paving improves the strength and durability of concrete by precisely controlling the wet state of concrete. The application of this technology makes the bridge structure more stable and prolongs its service life, thereby reducing the risk of traffic accidents caused by structural deterioration. The drip curing technology also supports the concept of green building and helps promote the construction industry to develop in an environmentally friendly and sustainable direction. Especially in the windy areas of Hexi, by laying a "two-cloth-one-film" waterproof geotextile above the drip infiltration system, it is ensured that it fits the drip infiltration system tightly to prevent water evaporation and leakage to the greatest extent. The technology reduces water waste and not only meets the society's expectations for green construction, but also improves the public's awareness and support for environmentally friendly construction and enhances the society's attention to sustainable development.

[0225] Embodiment 3 Application Example

[0226] 1. KJSG-2 contract section of the new reconstruction project of the Kushui to Jiepai Village section of G312 line

[0227] Project location: Yongdeng County, Lanzhou City, Gansu Province

[0228] Project Overview: The project starts at K49+000 and ends at K80+258.917, with a total length of 30.35km. The construction period is planned to be 24 months. The main contents include roadbed engineering, pavement engineering, bridge and culvert engineering, and traffic safety engineering, including 16 new bridges with a length of 2585.2m (9 large bridges with a length of 2282m, 4 medium bridges with a length of 218.08m, and 3 small bridges with a length of 85.12m), and 4 separated grade separations.

[0229] Construction start and completion dates: Construction starts on September 10, 2022 and is completed on July 12, 2024.

[0230] Project cost: 497.6562 million yuan.

[0231] 2. JASG-1 section of the G312 line Jiepai Village to Anmen (including Tianzhu transit section) upgrade and reconstruction project

[0232] Project location: Tianzhu County, Wuwei City, Gansu Province

[0233] Project Overview: The project starts at Jiepai Village, Tianzhu County, and connects with the end of the reconstruction project of the Kushui to Jiepai section of G312. The end is located in Chenjiagou, Tianzhu County, and connects to the existing G312 line. The total length of the route is 45.13km. The main project content includes 7 large bridges, 4 medium bridges, 13 small bridges, and 117 culverts.

[0234] Construction start and completion dates: Construction starts on November 1, 2021 and is completed on December 12, 2023.

[0235] Project cost: 457.8768 million yuan.

[0236] 3. Application effect

[0237] The curing of dripping bridge deck pavement shows obvious advantages over traditional water sprinkling curing. The dripping system not only improves the strength and durability of concrete through precise moisture control and automated management, but also reduces the waste of water resources and labor intensity. Innovatively, in the windy area of ​​Hexi, the technical measures of laying "two cloths and one membrane" waterproof geotextiles above the dripping system were proposed according to local conditions, overcoming the problem of high evaporation in the area. The water-saving effect and reduced management costs derived from this technology give it obvious advantages in both economic and environmental protection. With the continuous development of technology, this curing method is expected to be promoted in more concrete curing projects, further improving the curing effect and resource utilization efficiency.

[0238] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A cement concrete bridge deck pavement drip curing system, characterized by: It includes a water supply system, a filtration system, a main pipe and branch pipes, a drip irrigation belt, a control system and an anti-evaporation material; the water supply system includes a water source and a water supply pump, the filtration system is used to remove impurities in the water, the main pipe is used to connect a water storage device, and transports water to various areas of the bridge deck through a branch pipe system, the drip irrigation belt is responsible for evenly distributing water to the bridge deck pavement surface, the control system includes a controller, a water pressure regulator and various sensors for controlling the operation of the system, and the anti-evaporation material adopts a "two-cloth and one-membrane" material, which is composed of two layers of waterproof geotextile and one layer of anti-seepage membrane, which effectively prevents water evaporation and leakage.

2. A construction method for a cement concrete bridge deck pavement drip curing system, characterized in that: The steps include: Step 1: System installation and operation monitoring; Step 2: Water source system installation; Step 3: Installation of drip filtration system; Step 4: Laying of drip pipe network; Step 5: Test and adjust the drip infiltration system operation; Step 6: Optimization and determination of the operating parameters of the drip infiltration system; Step 7: Cover with "two cloths and one film" waterproof geotextile.

3. The construction method of a bridge deck pavement dripping curing system according to claim 2 is characterized in that: In step one, the following steps are specifically included: (1) Construction preparation Before installing the drip infiltration system, the construction site must be thoroughly cleaned. After cleaning, the permeable geotextile surface should be clean and flat. Then, the staff needs to make precise marks on the bridge deck according to the design drawings, marking the installation locations of the components of the drip infiltration system, including the main pipeline, branch pipes, and water storage equipment installation locations. (2) Preparation of tools and equipment The installation of the drip infiltration health care system requires a variety of professional tools and equipment. Before officially starting the installation, you must ensure that all necessary tools and equipment are ready. Each tool should be checked for its functional status to ensure that they are in good working condition. Check the power supply and temporary water facilities at the construction site in advance. You must ensure that there are sufficient power interfaces and stable power supply. If the power supply on site is insufficient, you may need to arrange temporary power supply equipment. During the installation and testing process, a large amount of water is required to flush the pipes, test the system pressure, etc. Therefore, it is necessary to ensure that there is a reliable water supply on site and prepare the necessary water pipes and connecting equipment.

4. The construction method of a bridge deck pavement dripping curing system according to claim 2 is characterized in that: In step 2, the following steps are specifically included: (1) Water source access The water source system is the starting point of the entire drip infiltration system. The quality of its installation directly affects the performance of the entire system. According to the specific requirements of the geographical location of the bridge, you can choose to connect to the municipal water supply or set up a self-supplied water source. If you choose to connect to the municipal water supply, you need to understand the situation of the local water supply network and determine the best access point. During the access process, you need to comply with relevant laws and regulations and technical standards to ensure the legality and safety of the connection. If you choose to provide your own water source, such as groundwater or surface water, you need to consider the stability and water quality of the water source. You may need to conduct a water quality test and decide whether additional water treatment equipment is needed based on the test results. (2) Installation of main water supply pipeline The installation of the main water supply pipeline is a key link in connecting the water source and the drip infiltration system. The connection between the main water supply pipeline and the water storage system and the main drip infiltration zone is another link that requires special attention. It needs to be carried out in accordance with standard operating procedures to ensure that each connection point is firm and reliable. After the connection is completed, a strict sealing test is required to ensure that there are no leaks.

5. The construction method of a bridge deck pavement dripping curing system according to claim 2 is characterized in that: In step three, in order to ensure the cleanliness of the water supply, a secondary filtration device needs to be installed. The primary and secondary selection of the filtration device needs to be determined according to the water quality of the water source and the requirements of the drip infiltration system. Since the water source of the water storage system is not uniform and will produce precipitated gravel, silt and aquatic plant debris after a long period of standing, in order to prevent clogging of the pipeline, a primary filtration device is installed between the water storage system and the main water supply pipe to ensure the cleanliness of the water source from the water storage system to the main water supply pipe. The secondary filtration device should be installed between the branch pipe drip infiltration zone and the main water supply pipe to perform a second filtration on the water flow of the drip infiltration system operation to ensure the cleanliness of the water source.

6. The construction method of a bridge deck pavement dripping curing system according to claim 2 is characterized in that: In step 4, the following steps are specifically included: (1) Installation of main drip strip The main drip tape is the aorta of the drip system. Its installation quality directly affects the performance of the entire system. During the laying process, special attention should be paid to the slope and direction of the main pipeline to conform to the longitudinal slope of the bridge. A reasonable slope can help empty the air in the pipeline and prevent the occurrence of air blockage. Pipe material selection: needs to be selected based on factors such as health environment, water flow system pressure, service life requirements, etc. Pipe diameter determination: Based on the design flow and pressure loss calculation, the diameter of the main drip zone is determined to be 10 cm to ensure that it can meet the water supply needs of the entire system; Slope control: The main drip zone pipeline should be laid out in accordance with the longitudinal slope of the bridge to facilitate exhaust and drainage; Fixed support: Pipe supports need to be set up at appropriate locations to prevent the pipeline from changing its laying position due to its own weight or water flow impact, causing the slope of the main drip zone to change and affecting the normal operation of the drip infiltration system; Regional control valves need to be installed on the main drip zone pipeline to control the water supply in different areas and reasonably adjust the water flow in each branch pipeline; (2) Arrangement of branch pipe drip zone The branch pipe drip zone is connected to the main drip zone through a connector. Its layout directly affects the uniformity of drip infiltration. The layout of the branch pipe needs to follow the following principles: Uniform spacing: The spacing between branch pipes should be consistent according to the design requirements. Usually, one branch pipe is arranged every 0.5 meters along the longitudinal direction of the bridge deck, and should be arranged as parallel as possible in the longitudinal slope direction to ensure uniform water pressure distribution and maintain consistent water flow; Slope control: During the laying process, special attention should be paid to the slope and direction of the branch pipe drip zone to conform to the transverse slope of the bridge. A reasonable slope can help evacuate the air in the pipeline and prevent the occurrence of air blockage; Connection control: At the connection between the branch drip zone and the main drip zone, a water flow control valve can be installed as needed to control the water supply of a separate branch drip zone. The water flow rate of a single branch drip zone can be reasonably adjusted. In the subsequent pressure test, in case of leakage, the valve can be directly closed to cut off the water flow. The installation position of these valves needs to be convenient for operation and maintenance.

7. The construction method of a bridge deck pavement dripping curing system according to claim 2, characterized in that: In step five, the following steps are specifically included: (1) Pipeline network water pressure test The water pressure test of the pipe network is a key step to ensure the reliable operation of the entire drip infiltration system. This process usually includes the following steps: Pipeline water filling: Open the main control valve of the water storage system. The first step is to slowly and evenly fill the entire pipe network with water to gradually expel the air in the pipe. This process takes a long time. The purpose of slow and even water filling is to avoid pipe rupture caused by the water hammer effect caused by rapid water filling; Pressure test: After the pipe is filled with water, the system pressure can be gradually increased and maintained for a certain period of time, usually 30 minutes to 1 hour. During this period, a dedicated person is required to carefully check whether there is any leakage in the entire drip seepage system, especially the location of each connection point; Leakage treatment: If a leak is found, mark the location and quickly close the main drip zone control valve and the branch drip zone water flow control valve, and repair it after reducing the pressure. After the repair is completed, retest it; Put into use: After the test is completed, adjust to normal water supply state and put into use; (2) Drip penetration uniformity test results The uniformity of dripping directly affects the curing effect, so detailed testing is required. The test steps include: Select sampling points: Select multiple representative test points on the bridge deck. Usually, sampling is done near the middle of the dripping zone between two branches to ensure the representativeness and reliability of the data. This strategy can effectively reflect the uniformity of the dripping of the entire system. Measuring flow rate: placing a collection device at each test point to collect the amount of dripping water obtained in the same period of time. This time can directly reflect the real data of the dripping water volume at different locations, and can also determine to a certain extent whether the layout position of the dripping belt is reasonable or damaged; Data analysis: Multiple experiments can be conducted on the same dripping point, and the dripping flow rate of each experimental point can be calculated, and the coefficient of variation of the flow rate can be analyzed. The coefficient of variation is usually required to be no more than 10%; Adjustment and optimization: If it is found that the drip volume in certain areas is obviously too low or too high, it is necessary to check the corresponding drip system and make necessary adjustments or replacements to the drip tape or control valve according to the specific situation.

8. The construction method of a bridge deck pavement dripping curing system according to claim 2, characterized in that: In step six, the following steps are specifically included: (1) Parameter settings Before the drip infiltration system is put into use, parameters need to be set and adjusted according to different environmental conditions to achieve the best maintenance effect: First, the setting of dripping frequency is a dynamic process, which needs to be adjusted according to the age of concrete and environmental conditions. In the initial stage of concrete pouring, due to the strong hydration reaction, more frequent dripping is required to maintain appropriate humidity. As the concrete gradually hardens, the dripping frequency can be gradually reduced. At the same time, environmental factors such as temperature, humidity and wind speed need to be considered. In hot and dry weather, the dripping frequency may need to be increased. The setting of dripping time also needs to be fine-tuned. This parameter mainly depends on the area of ​​the bridge deck and the local evaporation rate. Larger bridge deck areas may require longer dripping time to ensure full coverage, while in areas with high evaporation rates, dripping time may need to be extended to replenish water losses. In addition, the water absorption performance of concrete needs to be considered to ensure that each dripping can fully penetrate but not cause excess water. (2) Operation observation Close observation during the initial operation of the system is essential to timely detection and resolution of problems. This phase requires comprehensive and detailed monitoring of: First, continuously record the operating status of key system components, such as the switch status of valves, whether they can accurately respond to control signals, the working condition of drip strips, and whether there are blockages or water leaks. These records help to detect potential equipment problems early. Secondly, closely observe the water distribution on the bridge deck. Ideally, the entire bridge deck should be evenly moist. Pay special attention to whether there are obvious dry areas or waterlogged areas. Dry areas may mean insufficient dripping and seepage, and the control valves in the corresponding areas need to be adjusted to increase the water flow. Waterlogged areas may indicate poor local drainage or excessive dripping and seepage, and the control valves need to be adjusted to reduce the water flow. (3) Parameter Optimization The normal operation results of the drip infiltration system can be observed and summarized daily, and the system parameters can be adjusted. If it is observed that some areas of the bridge deck are too dry, it may be necessary to increase the drip infiltration frequency or extend the drip infiltration time in that area. On the contrary, if water accumulation is found, it may be necessary to reduce the drip infiltration volume or increase the drip infiltration interval. These adjustments need to be meticulous and may require different parameter settings for different areas. Optimization of control logic is the key to improving system responsiveness and accuracy. If it is found that the system's response to environmental changes is not timely or accurate enough, the control algorithm may need to be adjusted.

9. The construction method of a bridge deck pavement dripping curing system according to claim 2, characterized in that: In step seven, (1) Preliminary preparation Before laying, check the setting of the dripping system to ensure that the water supply is uniform and the flow rate is moderate, prepare for the subsequent thatching work, and clean the construction site thoroughly to ensure that there is no debris, dust and cement residue on the bridge deck. Good surface conditions are the basis for ensuring the effective adhesion of waterproof materials, and avoid debris affecting the sealing of the waterproof layer, causing water evaporation and wasting water resources; (2) Laying process Lay the "two-cloth-one-film" waterproof geotextile on the drip infiltration system, ensuring that it fits the drip infiltration system tightly to prevent water evaporation and leakage to the greatest extent. When laying, ensure that the waterproof geotextile is flat, without overlap or bubbles, and the edges should be neatly processed; (3) Notes The overlap width between waterproof geotextiles should meet the specifications, usually 20-30 cm, to ensure sealing and effectiveness. During the laying process, pay attention to avoid wrinkles and bubbles, which will directly affect the waterproof effect and structural stability of the fabric. Reasonable laying can improve the moisture retention capacity of concrete during the curing period, ensure that it maintains appropriate humidity in a windy and dry environment, and effectively promote strength growth; (4) Operation inspection After the laying is completed, it is very important to regularly check the condition of the waterproof geotextile to prevent moisture evaporation, ensure normal water supply, no damage to the fabric, and make timely adjustments to adapt to environmental changes.

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