Manufacturing method of T-beam concrete

Abstract

The invention relates to a manufacturing method of T-beam concrete. The manufacturing method comprises the following steps: s1, preparing and mixing concrete; s2, transporting the concrete; s3, pouring the concrete; the invention provides a standardized manufacturing method of the T-beam concrete and the proportion of the concrete, the quality is good, and the quality of the T-beam concrete is strictly controlled.

Description

Technical Field

[0001] The invention relates to the field of T-beam construction, and in particular to a method for making T-beam concrete. Background Art

[0002] During the T-beam construction process, the production of T-beam concrete is of paramount importance. Due to the large quantity, many workers are needed to produce it on-site. Due to the uneven production level of basic workers and the small operating space of equipment, the production quality of T-beam concrete will be uncontrolled, lack of standardized construction, and even lead to safety problems. Summary of the invention

[0003] The purpose of the present invention is to provide a method for manufacturing T-beam concrete, aiming to solve the problem that T-beam concrete lacks standardized construction and has uncontrolled quality.

[0004] The technical solution adopted by the present invention is: a method for making T-beam concrete, comprising the following steps: s1, batching and mixing of concrete, wetting the mixer with water, ensuring that the discharge gate is flexible, starting the mixer to run empty for 2 to 3 minutes to confirm that the accumulated water is drained normally, and then adding materials for mixing, the material ratio is 420kg of cement, 75kg of fly ash, 678kg of sand, 1110kg of crushed stone, 4.95kg of water reducer, 140kg of water, and 2.475kg of air entraining agent per cubic meter of concrete, and the order of adding materials is first to the mixer, then to the mixer, and finally ... Add sand, cement, and fly ash and stir for 5 seconds. After stirring evenly, add water and water reducing agent and stir for 30 seconds. Finally, add crushed stone and air entraining agent and stir for 90 seconds. After the feeding is completed, continue stirring for ≥120 seconds to obtain the ready-to-use concrete. When preparing the concrete mixture, the mass dosage of water, cement, fly ash, water reducing agent and air entraining agent must be accurate to ±1%; the mass dosage of sand and crushed stone must be accurate to ±2%; s2. Transportation of concrete. After the T-beam formwork is completed and the steel skeleton, formwork and embedded parts are inspected and accepted, use a smooth inner wall that does not absorb The transport equipment shall be water-proof, water-proof and have completed the removal of adhering concrete to transport the standby concrete. During the transportation process, ensure that there is no segregation, leakage, serious water seepage and excessive slump loss; s3. The pouring of concrete shall be in the order of bottom plate, web plate and top plate. On sunny days, the pouring direction shall be from the end of the T-beam to the span, and on rainy days, the pouring direction shall be from the middle of the span of the T-beam to the end. The pouring of concrete shall be continuous integral pouring. The method of oblique segmentation and horizontal layering shall be adopted during pouring. The inclination of the oblique segmentation is 30°~40°, and the length of the oblique segmentation is 6 ~8m section, the thickness of each layer of horizontal stratification is 20~30cm, and the pouring interval time between the front and rear layers of horizontal stratification is less than the initial setting time of concrete; s4, concrete vibration, the bottom plate and web are vibrated with attached vibrators, and the concrete above the prestressed pipe is vibrated with inserted vibrating rods; the top plate is vibrated with inserted vibrating rods on the front of the concrete, and the attached vibrators are installed on the outside of the side formwork and arranged in two rows every 1.5m to vibrate the side of the concrete; after the vibration is completed, the surface is plastered and maintained to form T-beam concrete.

[0005] A further technical solution of the present invention is: in step s1, the cement adopts ordinary silicate cement with a production number of PO42.5, the sand adopts natural river sand with a particle size of ≤5mm, and the crushed stone adopts two gradations of 5-10mm and 10-20mm, and the gradation ratio is 3:7.

[0006] A further technical solution of the present invention is: the transportation equipment in step s2 is an agricultural vehicle equipped with a hopper. After the agricultural vehicle transports the concrete to the T-beam casting site, the hopper is lifted by a 16t gantry crane and the concrete is poured into the T-beam template.

[0007] A further technical solution of the present invention is that when pouring concrete, the height between the concrete outlet of the hopper and the receiving surface is ≤2m.

[0008] A further technical solution of the present invention is: when pouring concrete, slurry blocking treatment is performed every 4 meters in the advancing direction of the concrete.

[0009] A further technical solution of the present invention is: in step s4, the vibration duration of each vibration point is 20 to 30 seconds.

[0010] The beneficial effects of the present invention are as follows: by adopting the above technical solution, a standardized method for manufacturing T-beam concrete and a concrete mix ratio are provided, the quality is good, and the quality control of T-beam concrete is strict. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a construction flow chart of a method for making T-beam concrete according to the present invention. DETAILED DESCRIPTION

[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] like Figure 1 A method for manufacturing T-beam concrete is shown.

[0014] Work preparation: Before starting work, the laboratory will inspect the raw materials, and the construction mix ratio and construction machinery will be complete; technical instructions will be given to concrete workers, and pre-job technical training will be provided to construction personnel; steel bars and formwork will be inspected and accepted.

[0015] Technical requirements: Concrete must have the strength and elastic modulus that meet the design requirements, and have the ability to prevent alkali-aggregate reaction; according to the type of environment and the level of erosion, it should have frost resistance, impermeability and corrosion resistance.

[0016] Concrete batching and mixing: (1) The cement used for concrete mixing shall be low-alkali ordinary silicate cement that meets the current national standards according to the needs of the bridge structure. The ordinary silicate cement with the production number of PO42.5 shall meet the technical standards of "General Portland Cement" GB175-2007 / , and meet the requirements of "Technical Conditions for Precast Post-Tensioned Prestressed Concrete Railway Bridge Simply Supported T-Beams" TB / T 3043-2005. It shall be inspected in accordance with the requirements of "Quality Acceptance Standard for Railway Concrete Engineering Construction" TB10424-2010. Each batch of bulk cement ≤500t and bagged cement ≤200t of cement from the same manufacturer, type, batch number and production date shall be considered as one acceptance batch (bulk cement: equal amount of cement is randomly taken from ≥3 tank trucks, and weighed ≥12kg after being mixed evenly). The cement fineness, setting time, stability, strength and other items shall be tested. Only after passing the test can it be put into use. When a batch of cement delivered to the site is less than 500t in bulk or less than 200t in bags, it should also be inspected as one acceptance batch; (2) Fly ash used in concrete should comply with the requirements of "Fly ash used in cement and concrete" (GB / T1596-2005) and "Technical conditions for simply supported T-beams of precast post-tensioned concrete railway bridges" TB / T3043-2005;

[0017] (3) The fine aggregate used in the concrete of the beam body is natural river sand with reasonable grading, uniform and firm texture, low water absorption, small porosity and particle size below 5 mm. The fine aggregate comes from the Jinpengang mining area (Dongting Lake, river sand) of Yueyang County, Miluo Zhenghai Building Materials Co., Ltd. (4) The coarse aggregate used in the concrete of the beam body is clean crushed stone with reasonable grading, good particle shape, uniform and firm texture and small linear expansion coefficient. The coarse aggregate is divided into two gradations of 5-10 mm and 10-20 mm, and the distribution ratio is 3:7 or according to the actual situation. The coarse aggregate is sourced from the Lidan Quarry of Guizhou Tieke New Materials Co., Ltd. The compressive strength of the coarse aggregate parent rock is greater than the highest grade C55 concrete strength of this beam yard; (5) The water reducer is sourced from Shanxi Jindunyuan Building Materials Co., Ltd. Its quality should meet the requirements of "Concrete Admixtures" (GB8076-2008) and "Polycarboxylic Acid High-Performance Water Reducer" JG / T223-2007; (6) Concrete mix ratio. The concrete mix ratio is selected by the central laboratory of the Wengma Railway Project Management Department through tests. The strength, elastic modulus, initial setting time, slump and other factors were taken into consideration during the selection. At the same time, the differences between the actual construction conditions and the test conditions were taken into consideration. The concrete of Tongqiao (2012) 2101 beam adopts the concrete with strength grade C55. The concrete mass per cubic meter of C55 concrete is selected as follows: 420 kg cement, 75 kg fly ash, 678 kg sand, 1110 kg crushed stone, 4.95 kg water reducer, 140 kg water and 2.475 kg air entraining agent. (7) If the conditions are different, the concrete mass of the concrete shall be 420 kg cement, 75 kg fly ash, 678 kg sand, 1110 kg crushed stone and 4.95 kg water reducer. When the mix ratio is re-selected due to changes in the mix ratio, the laboratory will promptly notify the relevant departments. In order to avoid mix ratio errors caused by frequent adjustments to the mix ratio parameters during the production process, the beam material notification form will be delivered to the mixing plant. Concrete batching must be carried out according to the laboratory notification form, and there must be test personnel on duty. The ingredients are measured by an automatic metering system and recorded on the computer. Before mixing, the mixer will be moistened with water, and the unloading gate will be checked for flexibility. Start the mixer and run it empty for 2 to 3 minutes. After confirming that it is normal, drain the accumulated water and then add materials for mixing. Before each pouring, the temperature, slump, air content and water seepage rate of the first batch of concrete shall be tested on site, and spot checks shall be carried out during the pouring process; (8) The water reducer shall be in liquid form and stored in a designated storage barrel; (9) Before the concrete is poured, the formwork installation, steel bar installation and process inspection and visa procedures shall be complete. If the visa procedures are not completed, the concrete will not be allowed to be poured; (10) Before the concrete is poured, the labor force shall be carefully organized, the weather forecast shall be mastered, and corresponding emergency measures shall be taken; (11) The order of feeding the raw materials for mixing concrete is as follows: first, add fine aggregate, cement and fly ash to the mixer and stir for 5 seconds. After mixing evenly, add water and water reducer and stir for 30 seconds. Finally, add two grades of coarse aggregate and stir for 90 seconds. The mixing time for each batch of concrete shall not be less than 120 seconds after all materials are added.

[0018] Summer construction measures: 1. Strictly stipulate the pouring time of T-beam prefabrication in summer, and try to arrange it to be poured before 8:00 in the morning or after 18:00 in the afternoon to control the temperature of the concrete mixture and the temperature difference between the inside and outside of the components. If necessary, cover and cool the raw materials; 2. Estimate the temperature of the concrete mixture according to the ambient temperature and the temperature of the sand and gravel, and take effective cooling measures; 3. Take measures to control the slump of concrete during summer construction. Under the high temperature conditions in summer, the operability of concrete is reduced, among which the slump loss is more obvious. Although there are many reasons for the slump loss, the slump loss caused by water evaporation and long-distance transportation is the main reason. Because the T-beam prefabrication site is close to the mixing plant, the slump loss during transportation is not the main reason. How to reduce the slump loss of the mixture and pouring is the main control measure: ① On-site test personnel should strengthen supervision, increase the inspection of on-site concrete preparation, shaking process, and aggregate measurement, and adjust the construction mix ratio according to the water content of sand and stone in real time; ② Shorten the pouring time so that its slump loss is not less than 90% of the original slump; ③ Adjust the admixture dosage to improve workability and facilitate vibration compaction; 4. Prevent concrete cracks. Concrete construction in summer is more likely to have cracks, the most common of which are temperature cracks, plastic shrinkage cracks and shrinkage cracks. Therefore, the following crack prevention measures should be adopted: (1) Start with improving the intrinsic quality of concrete, select and purchase coarse aggregates with appropriate particle size, good gradation, and crushed stone with high parent rock strength, low-alkali P·O42.5 ordinary Portland cement, and fine aggregates with good gradation and hard texture. (1) Use hard, clean medium-coarse river sand, strictly control the mud content of sand and gravel, improve the sand and gravel grading, and try to control the slump, unit water consumption, and water-cement ratio. (2) Improve the density of concrete, strictly control the production of test sand and stone grading, and make the vibration technology reasonable. Use the attached vibrator as the main vibration method, and the combination of the inserted vibrator and the attached vibrator to ensure the compactness of the concrete, improve the ultimate tensile strength of the concrete, and enhance the resistance to cracks. (3) Start with improving temperature conditions. Try to use low-temperature concrete and cement with low hydration heat. Sprinkle more water on the aggregate pile to evaporate and cool the aggregate to reduce the concrete mixing temperature. At the same time, control the pouring height of each layer not to exceed 30cm, which is beneficial to the vibration density and accelerates heat dissipation to avoid temperature cracks.

[0019] Technical measures for rain and sun protection during summer pouring: (1) During construction in the rainy season, the on-site transportation roads should be kept unobstructed, the road surface should be cleaned frequently, and accumulated water should be removed; (2) There should be reliable drainage facilities at the construction site during the rainy season. Before the rainy season comes, the existing drainage system should be inspected, unblocked, repaired, and reinforced, and drainage facilities should be added if necessary; (3) During concrete pouring, a special bridge deck rain shelter and rainproof "skirt curtain" should be used to prevent the concrete from being washed away by rain. During the rainy season, the concrete project should be covered during transportation to prevent rainwater from entering, and the strength and stability of the formwork support should be checked at any time; (4) Water retaining ladders should be set up around the belt contour of the mixing station, and the raw material conveyor belt and loading silo should be closed to reduce the impact of rainwater on construction. A "pit" and a water pump should be set up at the mixing station to prevent water accumulation in the mixing building; (5) Concrete pouring should be avoided as much as possible during high temperature periods. In addition, the laboratory should regularly measure the moisture content of sand and stone, and adjust the concrete mix ratio in time. The concrete should be covered with geotextile for maintenance, the watering frequency should be appropriately increased, and the geotextile should be used to keep it moist. A rain shelter should be set up in the beam yard to prevent the erosion of rainwater during the beam construction process and affect the quality of concrete; (6) Lightning protection and grounding devices should be added to the equipment storage site and processing site, and before the thunderstorm season, all lightning protection and grounding devices on site should be tested for safety; (7) The equipment that has arrived should be well maintained, and rain protection measures should be taken for equipment placed in the open air. The accessories supplied with the equipment should be stored in the warehouse; (8) In summer, high-temperature operations should be carried out on site. First aid measures for heat stroke should be taken, the working hours should be adjusted reasonably, and overtime should be strictly controlled. The method of "working at both ends and resting in the middle" should be adopted to avoid working during the high temperature period at noon and under the scorching sun. Humanized management should be promoted, and the health and safety of employees should be cared for. The rest time of front-line construction workers during high temperatures should be properly arranged to reduce labor intensity. Measures should be taken to ventilate and cool down the migrant workers' dormitories, and the number of residents in the dormitories should be controlled to ensure that the front-line construction workers have a good rest environment.

[0020] Cooling measures for steel formwork: During construction in summer, the daytime temperature is too high and the temperature of the steel formwork can reach 50°C after being exposed to the sun. To ensure the quality of concrete, the T-beam formwork to be poured will be covered with a "dry umbrella" at noon (the dry umbrella can be a rain shelter during construction in the rainy season) to avoid direct exposure of the formwork to the sun. Two hours before pouring concrete, the outside of the formwork will be flushed and cooled with tap water mixed in the beam yard. The concrete pouring can only be started after the laboratory confirms that the formwork temperature is below 35°C.

[0021] Transportation of concrete: 1. Check and confirm whether the steel skeleton, formwork, and embedded parts meet the technical requirements and whether they have been accepted. If not, the concrete mixing must be stopped; 2. During the transportation process, the concrete should not be segregated, leak, have severe water seepage, or have excessive slump loss. The inner wall of the transportation equipment should be smooth and flat, non-absorbent and non-leaky, and the adhered concrete should be removed frequently. The construction site of concrete transportation should be under unified command and dispatch to ensure the smooth pouring of beam concrete. The concrete mixing plant and the pouring platform should be closely coordinated and unified. During mixing, the hopper must be placed in the middle of the transport vehicle without lopsided loading. The transport vehicle must slow down at turns to prevent concrete from spilling and tipping over. 3. When pouring beam concrete with a concrete hopper, the height between the hopper outlet and the concrete receiving surface must not be greater than 2m. The unloading valve at the bottom of the hopper should be easy to open and must not leak. 4. The operators of the mixing plant must undergo special training and have a job certificate, otherwise they cannot operate on the job. 5. Check whether the water and electricity supply is guaranteed; whether the command personnel, management personnel and operating workers are complete and have undergone technical briefings, etc.

[0022] Concrete pouring: 1. The general principle of concrete pouring is to pour the bottom plate first, then the web plate, and finally the top plate. The pouring direction is from the end of the beam to the middle of the span (if construction is carried out on rainy days, in order to prevent water accumulation in the middle of the span of the bottom formwork, it is advisable to pour from the middle of the span to the end); 2. Concrete pouring adopts continuous integral pouring. The pouring method adopts oblique segmentation and horizontal layering. The process slope should be 30°~40°, the segment length should be 6-8 meters, the horizontal layer thickness should be controlled at 20~30cm (the cross-section of the bottom plate and the web plate should be controlled within 10cm to minimize bubbles at the cross-section), and the interval time between two layers should not exceed the initial setting time; 3. For the pouring method, concrete is transported by agricultural vehicles, and two hoppers are processed to carry concrete respectively. After the agricultural vehicle transports the concrete to the T-beam pouring site, the concrete hopper is lifted to a certain height by a 16t gantry crane and the concrete is poured into the T-beam formwork; 4. Before and during the pouring of concrete, the formwork, steel skeleton, embedded parts and formwork support should be tracked and inspected. When problems are found, they should be dealt with in time and records should be kept.

[0023] Concrete vibration method: The bottom plate and web of the beam body are vibrated by attached vibrators, supplemented by inserted vibrators (the part above the prestressed pipe); the top plate concrete is vibrated by inserted tamping rods. Attached vibrators are installed on the outside of the side formwork, staggered in two rows, with one installed every 1.5m; the circuits of the attached vibrators are connected in groups according to the pouring order to better control the vibration of the concrete.

[0024] Construction requirements: 1. Technical requirements for concrete mixing: (1) When preparing concrete mixtures, the mass dosage of water, cement, fly ash and water reducing agent should be accurate to ±1%; the mass dosage of sand and gravel should be accurate to ±2%; (2) The intermittent time of concrete mixing or pouring should be determined by the laboratory according to the cement properties, ambient temperature, water-cement ratio and admixture type, transportation distance, initial setting time, final setting time, etc. The specific situation shall be determined by the laboratory. The retention time of concrete mixture shall generally not exceed 1 hour, and the intermittent time shall generally not exceed 2 hours; (3) Before mixing concrete, the moisture content of sand and stone shall be measured, and the construction mix ratio shall be proposed based on the test results and theoretical mix ratio; (4) The slump, air content, water bleeding rate, water-cement ratio and mixture temperature of the first batch of concrete shall be tested and identified; (5) No air entraining agent and various chloride salts shall be added to the concrete mixture; (6) No water shall be added to the mixed concrete after it is taken out of the tank, and no segregation shall occur.

[0025] Technical requirements for concrete pouring: (1) Before pouring concrete, the debris in the formwork and the oil stains on the steel bars should be cleaned up; during the pouring of beam concrete, a designated person should be assigned to check the formwork, steel bars, etc. If the bolts, wedges, supports, etc. are loose, they should be tightened and reinforced in time. If there are changes or shifts in the steel bars and embedded parts, they should be adjusted in time to ensure the correct position. When there are gaps and holes in the formwork, they should be blocked to prevent leakage; (2) When pouring concrete into the formwork, the material should be poured evenly and coordinated with the vibration. The vibration and feeding of concrete should be carried out alternately; when pouring concrete, the falling distance of the concrete should not exceed 2m to avoid concrete segregation. In order to avoid the cement slurry concentrating on a certain section during vibration, causing the section to be weak in stress, it is necessary to carry out slurry blocking treatment every 4m in the direction of concrete advancement to ensure that the entire beam is evenly stressed; (3) When vibrating the concrete, the inserted vibrator must not touch the rubber rods embedded in the beam and the beam steel bars. It is forbidden to pour concrete directly from the hopper mouth to the web groove, so as to avoid the concrete from rushing down and causing the pre-buried pipes to bend or shift; (4) The bridge deck concrete should be dense, flat, and have smooth drainage. In addition to vibrating according to regulations, it must also be smoothed and plastered twice;

[0026] (5) When the outdoor temperature exceeds 350°C or the temperature of the concrete mixture reaches above 300°C, summer construction should be carried out or the concrete pouring time should be changed, and the pouring should be completed before 8:00 a.m. or after 18:00 p.m.; (6) When the average day and night temperature is below +5°C for three consecutive days, or the minimum temperature is below -3°C, the relevant regulations for winter construction should be followed; (7) The concrete of the beam body and bridge deck should be poured continuously and formed in one go. The total pouring time for each beam should not exceed 3.5 hours.

[0027] Technical requirements for concrete vibration: (1) The moving distance of the inserted vibrator should not be greater than 1.5 times the effective radius of the vibrator, and the depth of insertion into the lower layer of concrete should be 5 to 10 cm. When operating the inserted vibrator, it is advisable to insert it quickly and pull it out slowly. The operator of the inserted vibrator must have a strong sense of responsibility and vibrate according to the division of responsibilities. It is not allowed to under-vibrate or over-vibrate, and no omissions are allowed; (2) The spacing of the attached vibrator is four per mold fan, arranged in a zigzag pattern and tightly connected to the mold. The vibration distance of the attached vibrator should be able to cover the edge of the vibrated part; (3) The vibration duration of each vibration point should be 20s to 30s, until the concrete no longer sinks, no bubbles appear, and the surface shows floating slurry; pay attention to summarizing experience and mastering the optimal vibration time.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for making T-beam concrete, comprising the following steps: s1. Batching and mixing of concrete. The mixer is moistened with water to ensure that the discharge gate is flexible. The mixer is started to run empty for 2 to 3 minutes to confirm that the accumulated water is drained normally, and then the materials are added for mixing. The material ratio is 420kg of cement, 75kg of fly ash, 678kg of sand, 1110kg of crushed stone, 4.95kg of water reducer, 140kg of water, and 2.475kg of air entraining agent per cubic meter of concrete. The order of adding materials is to first add sand, cement, and fly ash to the mixer and stir for 5S. After stirring evenly, add water and water reducer and stir for 30S, and finally add crushed stone and air entraining agent and stir for 90S. After the addition of materials, continue stirring for ≥120S to obtain the ready-to-use concrete. When preparing the concrete mixture, the mass dosage of water, cement, fly ash, water reducer and air entraining agent must be accurate to ±1%; the mass dosage of sand and crushed stone must be accurate to ±2%; s2. Transportation of concrete: After the T-beam formwork is completed and the steel skeleton, formwork and embedded parts are inspected and accepted, the concrete to be used shall be transported by transportation equipment with smooth and flat inner wall, no water absorption and no water leakage, and complete removal of adhering concrete. During the transportation process, ensure that there is no segregation, leakage, severe bleeding and excessive slump loss; s3. Concrete pouring, the pouring order is first the bottom plate, then the web plate, and finally the top plate. On sunny days, the pouring direction is from the end of the T-beam to the span, and on rainy days, the pouring direction is from the middle of the span of the T-beam to the end. The concrete pouring adopts continuous integral pouring, and the pouring adopts the method of oblique segmentation and horizontal layering. The inclination of the oblique segmentation is 30°~40°, the length of the oblique segmentation is 6~8m per segment, the thickness of each horizontal layer is 20~30cm, and the pouring interval time between the front and rear layers of the horizontal layering is less than the initial setting time of the concrete; s4. Concrete vibration: Attached vibrators are used to vibrate the concrete at the bottom plate and web, and inserted vibrators are used to vibrate the concrete above the prestressed pipe. Inserted vibrators are used to vibrate the front of the concrete at the top plate, and attached vibrators are installed on the outside of the side formwork and arranged in two rows at intervals of 1.5m to vibrate the side of the concrete. After the vibration is completed, the concrete is plastered and cured to form the T-beam concrete.

2. The method for making T-beam concrete according to claim 1, characterized in that: In step s1, the cement is ordinary Portland cement with a production number of PO42.5, the sand is natural river sand with a particle size of ≤5mm, and the crushed stone is graded in two sizes of 5-10mm and 10-20mm, with a gradation ratio of 3:

7.

3. The method for making T-beam concrete according to claim 1, characterized in that: The transport equipment described in step s2 is an agricultural vehicle equipped with a hopper. After the agricultural vehicle transports the concrete to the T-beam casting site, the hopper is lifted by a 16t gantry crane and the concrete is poured into the T-beam template.

4. The method for making T-beam concrete according to claim 3, characterized in that: When pouring concrete, the height between the concrete outlet of the hopper and the receiving surface shall be ≤2m.

5. The method for making T-beam concrete according to claim 1, characterized in that: When pouring concrete, slurry blocking treatment is carried out every 4m in the direction of concrete advancement.

6. The method for making T-beam concrete according to claim 1, characterized in that: In step s4, the vibration duration of each vibration point is 20 to 30 seconds.

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