Ultra-high performance concrete beam manufacturing process

Abstract

The invention discloses a process for manufacturing ultra-high performance concrete I-beams, and the construction method thereof includes S1: setting a pre-tensioning pedestal at a predetermined position in a factory, and performing inorganic composite material mixing construction; S2: sequentially installing a bottom form and prestressed steel strands on the pre-tensioning pedestal, and setting a side form on the side of the steel skeleton to form a formwork body; S3: performing prestressed steel strand tensioning construction; S4: pouring inorganic composite materials into the formwork body to form an I-beam; S5: performing wet water curing construction of the I-beam; S6: performing prestressed steel strand release construction; S7: performing steam curing construction of the I-beam. The present application has the effect of improving the overall structural strength of the I-beam.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to a process for manufacturing ultra-high performance concrete beams. Background Art

[0002] In the civil engineering and construction industries, I-beams are widely used structural members with good load-bearing capacity and stability due to their unique cross-sectional shape. However, in the long-term use of ordinary concrete for I-beam casting, people have gradually discovered a series of problems and challenges, such as the relatively low tensile strength of ordinary concrete, which is prone to cracking when subjected to external forces, and the low natural frequency of ordinary concrete, which is prone to resonate with dynamic loads, causing excessive vibration and deformation of the structure, and even causing safety hazards.

[0003] Ultra-high performance concrete, internationally, refers to a general term for cement-based composite materials with a compressive strength of more than 150MPa, ultra-high toughness, and ultra-long durability. It is mainly composed of quartz sand, silica fume, cement, water reducer, steel fiber and other materials. Compared with ordinary concrete, UHPC has significant advantages when casting I-beams and other structures. During the construction process, ordinary concrete often faces challenges in construction accuracy, cracking, dynamic load self-vibration, construction cost, maintenance difficulty, thermal expansion and contraction. However, due to the high strength, high toughness and low porosity of UHPC, it can effectively reduce or avoid these problems, thereby improving the stability and safety of the structure.

[0004] With respect to the above-mentioned related technologies, how to apply ultra-high performance inorganic composite materials to the construction of I-beams is a problem that technicians in this field need to solve urgently. Summary of the invention

[0005] In order to use ultra-high performance concrete to cast and form an I-shaped beam with relatively high strength, the present application provides a process for manufacturing an ultra-high performance inorganic composite material pre-tensioned prestressed I-shaped beam.

[0006] The ultra-high performance concrete beam manufacturing process provided in this application adopts the following technical solutions:

[0007] A process for manufacturing an ultra-high performance concrete beam, the construction method of which comprises:

[0008] S1: Set up the pre-tensioning pedestal at the predetermined location in the factory and carry out the mixing construction of the inorganic composite material;

[0009] S2: Install the bottom formwork and prestressed steel strands on the pre-tensioning pedestal in sequence, and set side forms around the steel bar skeleton to form the formwork body;

[0010] S3: Carry out prestressed steel strand tensioning construction;

[0011] S4: pouring inorganic composite materials into the formwork body to form an I-shaped beam;

[0012] S5: Carry out wet water curing construction of I-beam;

[0013] S6: Carry out the construction of prestressed steel strand tensioning;

[0014] S7: Carry out steam-curing construction of I-beam.

[0015] By adopting the above technical solutions, firstly, the ultra-high performance inorganic composite I-beam relies on the ultra-high performance of the material itself, and the interior is extremely dense, which can effectively prevent the penetration of external water or other corrosive liquids, and avoid the corrosion of the I-beam; at the same time, because the water-gel ratio of the material itself is relatively small and the water content of the structure itself is low, the possibility of freeze-thaw damage to the I-beam is also reduced; secondly, based on the superior performance of the ultra-high performance inorganic composite material, the cross-sectional size of the ordinary concrete I-beam can be reduced by 30% under the same load capacity, and the deadweight of the structure can be reduced by 40%-60%; thereby reducing the construction cost of the lower structure and the construction cost of lifting and hoisting; thirdly, the superior corrosion resistance and durability of the ultra-high performance inorganic composite I-beam make the I-beam maintenance-free in the later stage, greatly reducing the maintenance cost.

[0016] Preferably, the inorganic composite material is used in conjunction with a mixing station; the specific method for performing the mixing construction of the inorganic composite material in S1 includes:

[0017] Firstly, ice cubes are taken out according to the mixing ratio of the raw materials of the inorganic composite material and crushed into ice slag, and then the ice slag is measured for the first time;

[0018] The ice slag is transported to the inlet of the mixing system of the mixing station by the transportation system of the mixing station, and then the ice slag is metered for the second time and then put into the mixing system;

[0019] Then, other raw materials of the inorganic composite material are added in order according to proportion until the proportion requirement of the inorganic composite material is met, and then the raw materials of the inorganic composite material are stirred.

[0020] Because the cement content of inorganic composite materials is higher than that of ordinary cement concrete, but the water content is lower, a large amount of hydration heat is easily generated during the production and mixing process, which can easily cause problems such as excessive power consumption in the production process and low productivity. By adopting the above technical solution, ice is used instead of tap water in actual construction to add to the raw materials for mixing, so as to neutralize the heat generated during the mixing of the inorganic composite materials, so that the mixture is kept at a low temperature during the mixing process.

[0021] Preferably, after S1, the construction method further comprises:

[0022] Filling the stirred inorganic composite material into a volumetric cylinder until it is higher than the mouth of the volumetric cylinder and vibrating the cylinder;

[0023] Then, the inorganic composite material in the volume cylinder is poured into a large volume container, water is added and stirred, and the steel fibers in the inorganic composite material are adsorbed by a magnet;

[0024] The steel fibers are washed, dried, and weighed to obtain the steel fiber content in the inorganic composite material;

[0025] The above operation is repeated to measure the steel fiber content in the inorganic composite material for the second time, and the average value of the two measurements is taken as the steel fiber content test result.

[0026] By adopting the above technical solution, the steel fiber content is measured to ensure the accuracy of steel fiber feeding, so that the steel fiber can effectively slow down the expansion of micro cracks inside the inorganic composite material, thereby making the material have ultra-high toughness and ductility.

[0027] Preferably, the specific method of S4 includes:

[0028] The inorganic composite material is transported by using a hopper, and during pouring, the bottom web of the I-beam is poured first, and then the face plate of the I-beam is poured;

[0029] When pouring, use longitudinally movable layered material distribution;

[0030] After the pouring of each bucket of the inorganic composite material is completed, the vibrator near the hopper discharge port is started.

[0031] Because the solidification speed is too fast when using inorganic composite materials to cast I-beams, by adopting the above-mentioned technical solution, the hopper is moved longitudinally at the template body to spread the inorganic composite material flatly inside the template body. Compared with fixed-point feeding, it can effectively reduce the situation where the inorganic composite material condenses in one place and then agglomerates; at the same time, the inorganic composite material cast in the template body is vibrated, so that the inorganic composite material is quickly flattened inside the template body, reducing the situation where the I-beam is difficult to form after the inorganic composite material agglomerates.

[0032] Preferably, the pre-tensioning pedestal comprises a pair of fixed pedestals cast on the ground and a pair of fixed beams respectively arranged at both ends of the fixed pedestals, and the sides of the two fixed beams close to each other are respectively fixedly connected to the two ends of each fixed pedestal; the fixed beams and the fixed pedestals are arranged to form a working cavity for placing the formwork body, wherein a plurality of jacks are arranged on the side of one of the fixed beams facing outside the working cavity, the jacks are fixedly arranged on the fixed beam, and a moving beam is installed at the output end of the jack; one end of the prestressed steel bar is anchored to the moving beam and slidably penetrated into the fixed beam close to the moving beam, and one end of the prestressed steel bar penetrated into the working cavity is anchored to the other fixed beam;

[0033] The specific construction method of S3 includes: starting the jack to drive the movable beam to move until the elongation of the prestressed steel strand reaches a predetermined length;

[0034] The construction method between S6 and S7 also includes: removing the I-beam from the pre-tensioning pedestal and transporting it to a curing cabin.

[0035] By adopting the above technical solution and using the pre-tensioning method for the construction of I-beams, firstly, the construction quality of prestressing can be effectively guaranteed. Secondly, after the inorganic composite material is used in conjunction with the pre-tensioning pedestal, because the ultra-high performance inorganic composite material has a large early strength, the compressive strength can reach 90Mpa 48 hours after initial setting, which meets the conditions for tensioning. The prestressed steel hinge rope can be cut and the I-beam can be moved, which effectively improves the circulation efficiency of the tensioning pedestal and reduces the construction cost.

[0036] Preferably, rollers are provided on the bottom mold, and the two ends of one of the fixed beams are detachably mounted on the fixed pedestals on both sides, and a plurality of pairs of pulleys are provided on the top of the bottom mold;

[0037] The specific method for moving the I-beam out of the pre-tensioning pedestal includes: first removing the fixed beam on one side, and then driving the formwork body to move until the I-beam moves out of the pre-tensioning pedestal.

[0038] By adopting the above technical solution, a pulley is installed on the prefabricated bottom mold. When the I-beam is moved, the template body and the I-beam can be directly pushed to the steaming place, reducing the use of large-volume moving machinery such as cranes, and the I-beam can be moved more quickly.

[0039] Preferably, a steaming component is provided in the curing cabin; the top of the curing cabin is open and provided with a sliding frame, the cross section of the sliding frame is arc-shaped, a sliding rod is slidably mounted on the sliding frame, a thermal insulation curtain is connected between the sliding rod and the sliding frame, and a sliding component for driving the sliding rod to slide on the sliding frame is provided on the sliding frame;

[0040] The specific construction method of S7 includes: opening the door of the curing cabin, and synchronously moving the bottom mold and the I-beam to the insulation cabin; then closing the door, starting the sliding assembly to drive the sliding rod to slide, until the sliding rod drives the insulation curtain to be laid on the top of the sliding frame; finally, starting the steaming assembly to output steam to steam the I-beam.

[0041] When the I-beam is moved, an I-beam that is too high may hit the top of the curing cabin, causing damage to the curing cabin and making it difficult to steam-cure the I-beam. By adopting the above technical solution, an opening is opened above the curing cabin to provide sufficient space for the movement of the I-beam, and then a combination of a sliding assembly, a sliding rod and an insulation curtain is used to close the top of the curing cabin to reduce the diffusion of steam, thereby keeping the steam during steaming in the curing cabin and maintaining the temperature in the curing cabin, which is conducive to maintaining the temperature of the I-beam.

[0042] Preferably, each of the cabin doors is equipped with the sliding assembly, which includes a first pull rope, a rotating shaft and a driving member; a storage groove is provided in each of the cabin doors, and the rotating shaft is rotatably installed in the cabin door through the storage groove, one end of the first pull rope is connected to the side of the sliding rod away from the thermal insulation curtain, and the other end is passed through the cabin door and connected to the rotating shaft, and the driving member is used to drive the rotating shaft to rotate; the sliding assembly also includes a reset member used to drive the sliding rod to reset to the end of the sliding frame away from the cabin door after sliding;

[0043] The specific method of starting the sliding assembly to drive the sliding rod to slide includes: starting the driving member to drive the rotating shaft to rotate and tighten the first pull rope until the sliding rod slides to the end of the sliding frame.

[0044] By adopting the above technical solution, after the driving member is started to drive the rotating shaft to rotate, the first pull rope is reeled in, so that the sliding rod is pulled to move on the sliding frame by the first pull rope. The sliding frame fixes the moving path of the sliding rod, thereby reducing the situation where the thermal insulation curtain cannot cover the top opening of the curing cabin after the sliding rod is offset, which is beneficial to reduce the diffusion of steam.

[0045] Preferably, a driving gear is sleeved on the rotating shaft, and a rack is slidably installed in each of the doors in the horizontal direction, and the driving gear is meshed with the rack; a first bag is installed on the side of each of the doors close to another door, and the first bag is located on the sliding path of the top rod; a second bag connected to each of the first bags is arranged on the top of each of the doors, and the second bag is used to abut against the sliding rod that slides to the end of the sliding frame close to the door;

[0046] The construction method after synchronously moving the bottom mold and the I-beam to the insulation chamber further includes: starting the driving member until the second bag abuts against the sliding rod.

[0047] By adopting the above technical solution, after the driving gear on each hatch rotates to drive the rack to slide, the rack squeezes the first bag to deform, thereby transmitting the gas inside the first bag to the second bag; first, after the first bags are compressed and deformed, they are tightly attached to each other, and the gap between the two hatches is sealed, which is beneficial to reduce the leakage of steam from the gap; the second bag expands after being inflated, so as to be tightly attached to the sliding rod, and the gap between the sliding rod and the two hatches is blocked, further reducing the diffusion of steam, thereby keeping the steam in the curing cabin, improving the thermal insulation and steaming capacity of the curing cabin, and improving the steaming effect of the I-beam.

[0048] Preferably, a connecting rod is installed on the template body, and a first locking groove for inserting the connecting rod is provided on the inner wall of the maintenance cabin, and the first locking groove is connected with a second locking groove at the bottom of the groove in the vertical direction, and a locking rod is slidably installed in the maintenance cabin in the second locking groove along the vertical direction, and the locking rod is inserted in the connecting rod; a linkage block is provided on the side of the locking rod away from the connecting rod, and a linkage groove for sliding the linkage block is provided on the side wall of the second locking groove of the maintenance cabin, and the sliding rod is provided with a second pull rope, and the end of the second pull rope away from the sliding rod is connected to the linkage block through the linkage groove;

[0049] The construction method after synchronously moving the bottom mold and the I-beam to the insulation chamber also includes: starting the sliding assembly to drive the sliding rod to move on the sliding frame until the locking rod is inserted into the connecting rod.

[0050] By adopting the above technical solution, when the sliding rod slides toward the hatch on the sliding frame, it drives the second pull rope and the linkage block to slide in the linkage groove. Through the linkage of the second pull rope and the linkage block, the locking rod is driven to slide in the second locking groove until it is inserted into the connecting rod, thereby completing the fixation of the connecting rod, and then fixing the template body and the I-beam in the maintenance cabin, reducing the risk of the template body with the pulley driving the I-beam to move in the maintenance cabin after closing the hatch, which is beneficial to reducing the risk of the I-beam being damaged by hitting the inner wall of the maintenance cabin after moving, and is beneficial to maintaining the structural integrity of the I-beam.

[0051] In summary, the present application includes at least one of the following beneficial technical effects:

[0052] 1. Ultra-high performance inorganic composite I-beams rely on the ultra-high performance of the material itself, and are extremely dense inside. They can effectively prevent the penetration of external water or other corrosive liquids, avoiding corrosion damage to the I-beams. At the same time, because the material itself has a relatively small water-gel content and the structure itself has a low water content, freeze-thaw damage to the I-beams is also avoided.

[0053] 2. Based on the superior performance of ultra-high performance inorganic composite materials, the cross-sectional size of ordinary concrete I-beams can be reduced by 30% under the same load capacity, and the deadweight of the structure can be reduced by 40%-60%. This can reduce the construction cost of the lower structure and the construction cost of lifting and hoisting.

[0054] 3. The ultra-high performance inorganic composite I-shaped beam is constructed by pre-tensioning method, which can effectively ensure the construction quality of prestressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is the construction flow chart of Example 1 of the present application.

[0056] Figure 2 This is the main structure diagram of the pre-tensioned pedestal in Example 1 of the present application.

[0057] Figure 3 It is a side sectional view of the pre-tensioning pedestal of Example 2 of the present application.

[0058] Figure 4 It is a schematic diagram of the overall structure of the maintenance cabin of Example 2 of the present application.

[0059] Figure 5 This is the first cross-sectional view of the maintenance cabin of Example 2 of the present application.

[0060] Figure 6 This is the second cross-sectional view of the maintenance cabin of Example 2 of the present application.

[0061] Figure 7 This is the third cross-sectional view of the maintenance cabin of Example 2 of the present application.

[0062] Figure 8 yes Figure 7 A is an enlarged view of the middle image.

[0063] Description of reference numerals:

[0064] 1. Pre-tensioning pedestal; 11. Fixed pedestal; 12. Fixed beam; 2. Jack; 13. Moving beam; 3. I-beam; 4. Maintenance cabin; 41. Steam pipe; 42. Sliding frame; 43. Sliding rod; 431. Second pull rope; 44. Insulation curtain; 45. Cabin door; 46. First bag; 47. Second bag; 48. Locking rod; 49. Linkage block; 5. Sliding assembly; 51. First pull rope; 52. Rotating shaft; 53. Driving member; 54. Resetting member; 541. Resetting rope; 542. Counterweight; 6. Driving gear; 7. Rack; 31. Connecting rod. DETAILED DESCRIPTION

[0065] The following is combined with Figure 1-8 This application is described in further detail.

[0066] Example 1

[0067] Example 1 of the present application discloses a process for manufacturing ultra-high performance concrete beams, referring to Figure 1 and Figure 2 , the construction methods include:

[0068] S1: A pre-stressing pedestal 1 is set at a predetermined position in the factory, and the inorganic composite material mixing construction is carried out.

[0069] Reference Figure 2 The pre-tensioning pedestal 1 comprises a pair of fixed pedestals 11 cast on the ground and a pair of fixed beams 12 respectively arranged at both ends of the fixed pedestals 11, and the sides of the two fixed beams 12 close to each other are respectively fixedly connected to the two ends of each fixed pedestal 11; the fixed beams 12 and the fixed pedestals 11 are arranged to form a working cavity for placing the formwork body, wherein a plurality of jacks 2 are arranged on the side of one fixed beam 12 facing outside the working cavity, the jacks 2 are fixedly arranged on the fixed beam 12, and a moving beam 13 is installed on the output end of the jack 2; one end of the prestressed steel bar is anchored to the moving beam 13 and is slidably penetrated into the fixed beam 12 close to the moving beam 13, and one end of the prestressed steel bar penetrated into the working cavity is anchored to the other fixed beam 12;

[0070] Inorganic composite materials are used in conjunction with a mixing station; the specific methods for mixing inorganic composite materials in S1 include:

[0071] An ice refrigeration room for storing ice for mixing is set up in the mixing station to facilitate workers to take ice;

[0072] During the stirring process, ice cubes are first taken out and crushed into ice slag according to the mixing ratio of the raw materials of the inorganic composite material, and then the ice slag is measured for the first time;

[0073] The ice slag is transported to the inlet of the mixing plate of the mixing system of the mixing station through the transportation system of the mixing station, such as the transportation belt, and then the ice slag is accurately measured for the second time and then put into the mixing plate of the mixing system;

[0074] Then, other raw materials of the inorganic composite material are added in order according to the proportion until the proportion requirement of the inorganic composite material is met, and then the raw materials of the inorganic composite material are stirred;

[0075] The factory temperature of the finished inorganic composite materials is measured before leaving the factory, and the temperature of the finished products is controlled within 25 degrees.

[0076] The construction method after S1 also includes: filling the mixed inorganic composite material into the capacity cylinder until it is higher than the cylinder mouth of the capacity cylinder and vibrating it with a vibration table or a vibrating hammer. If the inorganic composite material sinks below the cylinder mouth during the vibration process, it should be added at any time until the slurry comes out of the surface;

[0077] Scrape off the excess inorganic composite material on the surface of the volume cylinder and fill the concave parts of the surface;

[0078] Then pour the inorganic composite material in the capacity cylinder into a large volume container that is not less than 10 times the volume of the inorganic composite material, add water and stir, and use a magnet to absorb the steel fiber in the inorganic composite material, and carefully wash away foreign matter adhering to the steel fiber;

[0079] Dry the steel fiber at 105℃±5℃ to constant weight for no less than 4h, and then weigh it every 1h until the difference between two consecutive weighings is less than 0.5% of the smaller value; after cooling to room temperature, weigh it to an accuracy of 1g; and obtain the steel fiber content in the inorganic composite material;

[0080] Repeat the above operation to measure the steel fiber content in the inorganic composite material for the second time. The deviation of the two measurements should be less than 5% of the average value of the two measurements, otherwise the result is invalid and should be retested.

[0081] Finally, the average value of the two measurements was taken as the steel fiber content test result.

[0082] S2: Install the bottom formwork and the prestressed steel strands on the pre-tensioning pedestal 1 in sequence, and set side forms around the steel bar skeleton to form a formwork body;

[0083] S3: Carry out prestressed steel strand tensioning construction;

[0084] The specific construction method of S3 includes: starting the jack 2 to drive the moving beam 13 to move until the elongation of the prestressed steel strand reaches a predetermined length;

[0085] S4: pouring inorganic composite material into the formwork body to form an I-shaped beam 3;

[0086] The specific method of S4 includes: using a hopper to transport the inorganic composite material, and when pouring, first pouring the bottom web of the I-beam 3, and then pouring the face plate of the I-beam 3;

[0087] The pouring time should be selected during the period of lower temperature on the day; longitudinal movable layered material should be used during pouring to ensure uniform distribution of steel fibers;

[0088] During pouring, follow the instructions of the on-site construction personnel and discharge the materials to the designated location; the discharge speed should be uniform and gentle to prevent the concrete from spilling or overflowing;

[0089] After pouring each bucket of inorganic composite material, start the vibrator near the hopper discharge port and vibrate for 90 seconds to 120 seconds;

[0090] If the interval between the two bucket materials is long, turn on the vibrator at the discharge port for 30 seconds when pouring the second bucket material.

[0091] By laying multiple layers of inorganic composite materials on the template body, the situation where the inorganic composite materials accumulate and condense in one place is reduced. At the same time, the inorganic composite materials in the template body are vibrated so that the inorganic composite materials are quickly flattened in the template body, further reducing the situation where the I-beam is difficult to form after the material clumps.

[0092] S5: Carry out wet water curing construction of I-beam 3;

[0093] S6: Carry out the construction of prestressed steel strand tensioning; when tensioning, the strength test of I-beam 3 is required. When the compressive strength of I-beam 3 reaches 90Mpa (after two days of curing), the steel strand tensioning and cutting construction can be carried out. The order of cutting the prestressed steel strands is symmetrical from both sides to the middle.

[0094] The construction method between S6 and S7 also includes: removing the I-shaped beam 3 from the pre-tensioning base 1 and transporting it to a predetermined position for steam curing.

[0095] S7: Carry out steam-curing construction of I-beam 3.

[0096] The specific construction methods of S7 include: centralized steam curing by covering the scaffold with tarpaulin. During steam curing, pay attention to covering the top surface of the beam with plastic film or other coverings to prevent water marks or pits caused by dripping;

[0097] During steam curing, pay attention to the heating and cooling speed. The heating should not be too fast. Ensure that the heating speed is within 10℃ / h. After heating to 90℃, maintain the temperature for 48h, and then cool it down at 15℃ / h to ensure the steam curing effect and safety of the components.

[0098] During the steaming process, personnel must be arranged on duty to regularly test and calibrate the steaming temperature, observe whether the boiler burner is working normally, the boiler water level, whether the water pump is working normally, the water level in the bucket, whether the boiler is dry-burning, etc. During the steaming process, the actual steaming situation and steaming temperature must be inspected and recorded in writing. The recording frequency is once an hour when the temperature rises and once every two hours during normal steaming. If any problems occur during the steaming process, they must be solved in time.

[0099] Example 2

[0100] The difference between Example 2 of the present application and Example 1 is that the construction method between S6 and S7 also includes: removing the I-beam 3 from the pre-tensioning base 1 and transporting it to the curing cabin 4 for steam curing.

[0101] Reference Figure 3 , rollers are arranged on the bottom mold, and both ends of a fixed beam 12 are detachably mounted on the fixed pedestals 11 on both sides, and a plurality of pairs of pulleys are arranged on the top of the bottom mold; the specific method of moving the I-beam 3 out of the pre-tensioning pedestal 1 includes: first removing the fixed beam 12 on one side, and then driving the formwork body to move until the I-beam 3 moves out of the pre-tensioning pedestal 1; then the workers can reinstall the fixed beam 12 to form a complete pre-tensioning pedestal 1, and prefabricate the next I-beam 3.

[0102] Reference Figure 4 A steam curing component is provided in the curing chamber 4. In this embodiment, the steam curing component includes a steam pipe 41 and a steam boiler. One end of the steam pipe 41 is connected to the curing chamber 4, and the other end is connected to the steam boiler. After the steam boiler is started, steam can be filled into the curing chamber 4 to form a steam curing of the I-shaped beam 3.

[0103] Reference Figure 4 and Figure 5 The top of the curing cabin 4 is open and is provided with a sliding frame 42. The cross-section of the sliding frame 42 is arc-shaped. A sliding rod 43 is slidably installed on the sliding frame 42. A thermal insulation curtain 44 is connected between the sliding rod 43 and the sliding frame 42. A sliding component 5 for driving the sliding rod 43 to slide on the sliding frame 42 is provided on the sliding frame 42; the sliding component 5 is started to drive the sliding rod 43 to slide on the sliding frame 42, driving the thermal insulation curtain 44 to complete the covering of the top opening of the curing cabin 4, thereby closing the top of the curing cabin 4, reducing the diffusion of steam, thereby keeping the steam during steaming in the curing cabin 4, and maintaining the temperature in the curing cabin 4.

[0104] Each cabin door 45 is equipped with a sliding assembly 5, which includes a first pull rope 51, a rotating shaft 52 and a driving member 53; a storage groove is provided in each cabin door 45, and the rotating shaft 52 is rotatably installed in the cabin door 45 through the storage groove. One end of the first pull rope 51 is connected to the side of the sliding rod 43 away from the thermal insulation curtain 44, and the other end is passed through the cabin door 45 and connected to the rotating shaft 52. The driving member 53 is used to drive the rotating shaft 52 to rotate. In this embodiment, the driving member 53 is a micro motor, which is installed in the cabin door 45 and the output end of the driving member 53 is connected to the rotating shaft 52; the sliding assembly 5 also includes a reset member 54 for driving the sliding rod 43 to reset to the end of the sliding frame 42 away from the cabin door 45 after sliding;

[0105] Reference Figure 5 and Figure 6 In this embodiment, the reset member 54 includes a reset rope 541 and a counterweight 542. A sliding groove is provided on the side wall of the maintenance cabin 4 away from the hatch 45 in the vertical direction. The counterweight 542 is slidably installed on the maintenance cabin 4 through the sliding groove. One end of the reset rope 541 is connected to the counterweight 542 and the other end is connected to the slide bar 43. The driving member 53 is first closed, and then under the action of the counterweight 542, the pulling force on the slide bar 43 is maintained through the reset rope 541, so that the slide bar 43 is always driven to slide away from the hatch 45, and then the thermal insulation curtain 44 is recovered, reducing the collision between the I-beam 3 and the slide bar 43 when moving the I-beam 3 and the bottom plate, which is beneficial to maintaining the structural integrity of the maintenance cabin 4.

[0106] The specific construction method of S7 includes: opening the hatch 45 of the curing cabin 4, and synchronously moving the bottom mold and the I-beam 3 to the insulation cabin; then closing the hatch 45, starting the sliding assembly 5 to drive the sliding rod 43 to slide, until the sliding rod 43 slides and drives the insulation curtain 44 to be laid on the top of the sliding frame 42; finally, starting the steaming assembly to output steam to steam the I-beam 3.

[0107] The specific method of starting the sliding assembly 5 to drive the sliding rod 43 to slide includes: starting the driving member 53 to drive the rotating shaft 52 to rotate and tighten the first pull rope 51 until the sliding rod 43 slides to the end of the sliding frame 42.

[0108] Reference Figure 5 , a driving gear 6 is sleeved on the rotating shaft 52, and a rack 7 is slidably installed in each door 45 in the horizontal direction, and the driving gear 6 is meshed with the rack 7; a first bag 46 is installed on the side of each door 45 close to another door 45, and the first bag 46 is located on the sliding path of the top rod; a second bag 47 connected to each first bag 46 is arranged on the top of each door 45, and the second bag 47 is used to abut against the sliding rod 43 that slides to one end of the sliding frame 42 close to the door 45;

[0109] The construction method after synchronously moving the bottom mold and the I-beam 3 to the insulation cabin also includes: starting the driving member 53 until the second bag 47 abuts against the slide bar 43, at which time the second bag 47 closes the gap between the slide bar 43 and the cabin door 45 to reduce the diffusion of steam there.

[0110] Reference Figure 5 , Figure 7 and Figure 8 A connecting rod 31 is installed on the template body, a first locking groove for inserting the connecting rod 31 is provided on the inner wall of the curing cabin 4, and a second locking groove is connected to the bottom of the first locking groove in the vertical direction. A locking rod 48 is slidably installed in the curing cabin 4 in the second locking groove in the vertical direction, and the locking rod 48 is inserted in the connecting rod 31; a linkage block 49 is provided on the side of the locking rod 48 away from the connecting rod 31, and a linkage groove for sliding the linkage block 49 is provided on the side wall of the second locking groove of the curing cabin 4, and a second pull rope 431 is provided on the sliding rod 43, and one end of the second pull rope 431 away from the sliding rod 43 is connected to the linkage block 49 through the linkage groove;

[0111] The construction method after synchronously moving the bottom form and the I-beam 3 to the insulation chamber also includes: starting the sliding assembly 5 to drive the sliding rod 43 to move on the sliding frame 42 until the locking rod 48 is inserted into the connecting rod 31, locking the connecting rod 31 in the first locking groove, thereby locking the template body and the I-beam 3 in the curing chamber 4.

[0112] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Ultra-high performance concrete beam manufacturing process, characterized in that: The manufacturing process comprises: S1: setting a pre-tensioning pedestal (1) at a predetermined location in the factory and carrying out mixing construction of the inorganic composite material; S2: installing a bottom form and prestressed steel strands on the pre-tensioning pedestal (1) in sequence, and setting side forms around the steel bar skeleton to form a formwork body; S3: Carry out prestressed steel strand tensioning construction; S4: pouring an inorganic composite material into the formwork body to form an I-shaped beam (3); S5: Perform wet water curing construction on the I-beam (3); S6: Carry out the construction of prestressed steel strand tensioning; S7: Carry out steaming and curing of the I-shaped beam (3); The pre-tensioning pedestal (1) comprises a pair of fixed pedestals (11) cast on the ground and a pair of fixed beams (12) respectively arranged at two ends of the fixed pedestals (11), and the sides of the two fixed beams (12) close to each other are respectively fixedly connected to the two ends of each fixed pedestal (11); the fixed beams (12) and the fixed pedestals (11) are arranged to form a working cavity for placing the formwork body, wherein a plurality of jacks (2) are arranged on the side of one of the fixed beams (12) facing outside the working cavity, the jacks (2) are fixedly arranged on the fixed beam (12), and a moving beam (13) is installed at the output end of the jack (2); one end of the prestressed steel strand is anchored to the moving beam (13) and is slidably passed through the fixed beam (12) close to the moving beam (13), and one end of the prestressed steel strand passed through the working cavity is anchored to the other fixed beam (12); The specific construction method of S3 comprises: starting the jack (2) to drive the movable crossbeam (13) to move until the elongation of the prestressed steel strand reaches a predetermined length; The construction method between S6 and S7 further includes: removing the I-shaped beam (3) from the pre-tensioning pedestal (1) and transporting it to a curing cabin (4); Rollers are arranged on the bottom mold, and the two ends of one of the fixed cross beams (12) are detachably mounted on the fixed pedestals (11) on both sides, and a plurality of pairs of pulleys are arranged on the top of the bottom mold; The specific method for moving the I-shaped beam (3) out of the pre-tensioning pedestal (1) comprises: first removing the fixed crossbeam (12) on one side, and then driving the formwork body to move until the I-shaped beam (3) moves out of the pre-tensioning pedestal (1); A steaming component is arranged in the curing cabin (4); the curing cabin (4) is open at the top and is provided with a sliding frame (42); the sliding frame (42) has an arc-shaped cross section; a sliding rod (43) is slidably mounted on the sliding frame (42); a heat preservation curtain (44) is connected between the sliding rod (43) and the sliding frame (42); and a sliding component (5) is arranged on the sliding frame (42) for driving the sliding rod (43) to slide on the sliding frame (42); The specific construction method of S7 comprises: opening the hatch (45) of the curing cabin (4), and synchronously moving the bottom mold and the I-shaped beam (3) to the insulation cabin; then closing the hatch (45), starting the sliding assembly (5) to drive the sliding rod (43) to slide, until the sliding rod (43) drives the insulation curtain (44) to be laid on the top of the sliding frame (42); finally starting the steam curing assembly to output steam to steam the I-shaped beam (3); Each of the cabin doors (45) is equipped with the sliding assembly (5), and the sliding assembly (5) includes a first pull rope (51), a rotating shaft (52) and a driving member (53); each of the cabin doors (45) is provided with a storage groove, and the rotating shaft (52) is rotatably installed in the cabin door (45) through the storage groove; one end of the first pull rope (51) is connected to the side of the sliding rod (43) away from the thermal insulation curtain (44), and the other end is passed through the cabin door (45) and connected to the rotating shaft (52); the driving member (53) is used to drive the rotating shaft (52) to rotate; the sliding assembly (5) also includes a reset member (54) used to drive the sliding rod (43) to reset to the end of the sliding frame (42) away from the cabin door (45) after sliding; The specific method of starting the sliding assembly (5) to drive the sliding rod (43) to slide includes: starting the driving member (53) to drive the rotating shaft (52) to rotate and tighten the first pull rope (51) until the sliding rod (43) slides to the end of the sliding frame (42).

2. The process for manufacturing ultra-high performance concrete beams according to claim 1, characterized in that: The inorganic composite material is used in conjunction with a mixing station; the specific method for mixing the inorganic composite material in S1 includes: Firstly, ice cubes are taken out according to the mixing ratio of the raw materials of the inorganic composite material and crushed into ice slag, and then the ice slag is measured for the first time; The ice slag is transported to the inlet of the mixing system of the mixing station by the transportation system of the mixing station, and then the ice slag is metered for the second time and then put into the mixing system; Then, other raw materials of the inorganic composite material are added in order according to proportion until the proportion requirement of the inorganic composite material is met, and then the raw materials of the inorganic composite material are stirred.

3. The process for manufacturing ultra-high performance concrete beams according to claim 2, characterized in that: After S1, the manufacturing process further includes: Filling the stirred inorganic composite material into a volumetric cylinder until it is higher than the mouth of the volumetric cylinder and vibrating the cylinder; Then, the inorganic composite material in the volume cylinder is poured into a large volume container, water is added and stirred, and the steel fibers in the inorganic composite material are adsorbed by a magnet; The steel fibers are washed, dried, and weighed to obtain the steel fiber content in the inorganic composite material; The above operation is repeated to measure the steel fiber content in the inorganic composite material for the second time, and the average value of the two measurements is taken as the steel fiber content test result.

4. The process for manufacturing ultra-high performance concrete beams according to claim 3, characterized in that: The specific method of S4 includes: The inorganic composite material is transported by using a hopper, and during casting, the bottom web of the I-shaped beam (3) is cast first, and then the face plate of the I-shaped beam (3) is cast; When pouring, use longitudinally movable layered material distribution; After the pouring of each bucket of the inorganic composite material is completed, the vibrator near the hopper discharge port is started.

5. The process for manufacturing ultra-high performance concrete beams according to claim 1, characterized in that: A connecting rod (31) is installed on the template body, and a first locking groove for inserting the connecting rod (31) is provided on the inner wall of the maintenance cabin (4), and the first locking groove is connected to a second locking groove at the bottom of the groove in the vertical direction. A locking rod (48) is slidably installed in the maintenance cabin (4) in the second locking groove in the vertical direction, and the locking rod (48) is inserted in the connecting rod (31); a linkage block (49) is provided on the side of the locking rod (48) away from the connecting rod (31), and a linkage groove for sliding the linkage block (49) is provided on the side wall of the second locking groove of the maintenance cabin (4), and the sliding rod (43) is provided with a second pull rope (431), and the end of the second pull rope (431) away from the sliding rod (43) is connected to the linkage block (49) through the linkage groove; The construction method after synchronously moving the bottom mold and the I-beam (3) to the insulation chamber also includes: starting the sliding assembly (5) to drive the sliding rod (43) to move on the sliding frame (42) until the locking rod (48) is inserted into the connecting rod (31).

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