Pipe piece processing facility and method

Abstract

The invention discloses a duct piece machining facility and method. The facility comprises a conveying system, a pulping system and a duct piece production system, the conveying system is located at one end of the duct piece production system, and the pulping system is located on the side face of the duct piece production system; according to the pipe piece manufacturing system, gravel is conveyed into the slurrying system through the conveying system, the gravel is manufactured into concrete through the slurrying system, the manufactured concrete is injected into the mold, pipe pieces are manufactured in the pipe piece production system, and in the pipe piece production system, the mold is conveyed through a production rail; the whole vibration table is adopted to vibrate the mold so that concrete can be tamped, finally, steam curing is conducted on the duct piece through the steam curing kiln, in the whole process, full-automatic production is achieved, the production efficiency of the duct piece is greatly improved, waste of manpower resources is reduced, and the production quality of the duct piece is also greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipe segment processing, and in particular to a pipe segment processing facility and method. Background Art

[0002] The lining of shield tunnels generally has two forms: precast concrete segments and extruded concrete linings. The use of precast concrete segments to assemble tunnel linings has the advantages of easy quality assurance and easy mechanized operation, so it is widely used. The segments are also called the primary lining of the shield tunnel. As the lining of the tunnel, they are part of the temporary support or permanent support of the tunnel. The segments are reinforced concrete components with high technical content and particularly high process and quality requirements. The requirements for their strength, impermeability, geometric dimensions, and apparent quality are very strict. However, the existing segment production process is mainly manual, with low production efficiency, and the quality of the segments cannot be guaranteed. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a pipe segment processing facility to solve the problem of low pipe segment production efficiency and unguaranteed quality.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a pipe segment processing facility, including a conveying system, a slurry system and a pipe segment production system, wherein the conveying system is located at one end of the pipe segment production system, and the slurry system is located at the side of the pipe segment production system; the conveying system includes a discharge bin, a plurality of conveyor belts and a storage bin, wherein the discharge bin is used to receive sand and gravel transported by a transport vehicle, a group of the conveyor belts is used to transport the sand and gravel to the storage bin, and another group of the conveyor belts is used to transport the sand and gravel in the storage bin to the Pulping system; the slurrying system is used to make the sand and gravel into concrete, the slurrying system includes a stirring subsystem, an aggregate subsystem, a powder subsystem, a water and admixture subsystem, a sand and gravel separator sewage treatment subsystem and a distribution subsystem, the aggregate subsystem, the powder subsystem, the water and admixture subsystem, the sand and gravel separator sewage treatment subsystem are connected to the stirring subsystem; the aggregate subsystem is used to transport aggregates to the stirring subsystem, the powder subsystem is used to transport powders to the stirring subsystem, and the water and admixture subsystem is used to The water and admixture are transported to the mixing subsystem, and the sand and gravel separator sewage treatment subsystem is used to discharge and treat the sewage from the mixing subsystem; the distribution subsystem is used to distribute the concrete to the segment production system; the segment production system includes a crane, a production track, a track conveying motor, an integral vibration table, a track mother-and-child car, a steaming kiln and a demoulding device; the production track is laid on the ground, the crane is arranged on the upper side of the production track, and the track conveying motor is connected to the production track to rotate the roller or chain on the production track, thereby driving the mold on the production track to move; the integral vibration table is arranged at the production track, and the track letter car is used to carry the mold to put the mold on or take it off the production track; and the mold is transported or transported out of the steaming kiln, the steaming kiln is arranged on the inner side of the production track, and the steaming kiln is used to steam cure the concrete in the mold to form a segment; the demoulding device is arranged on the upper side of the production track to take out the segment in the mold.

[0005] The beneficial effects of the present application are as follows: in the present application, sand and gravel are transported to the pulping system through the conveying system, the pulping system makes the sand and gravel into concrete, and the made concrete is injected into the mold, and the pipe segments are manufactured in the pipe segment production system. In the pipe segment production system, the mold is transported by a production track, and the mold is vibrated by an integral vibration table to compact the concrete. Finally, the pipe segments are steam-cured by a steam-curing kiln. In the whole process, fully automatic production is achieved, which greatly improves the production efficiency of the pipe segments, reduces the waste of human resources, and greatly improves the production quality of the pipe segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a process flow chart of a method for producing a pipe segment according to an embodiment of the present application;

[0007] Figure 2 is a schematic diagram of the distribution structure of various systems in the production of pipe segments according to an embodiment of the present application;

[0008] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along the 6-6 direction;

[0009] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure along the 5-5 direction;

[0010] Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure along the 4-4 direction;

[0011] Figure 6 yes Figure 2 A schematic diagram of the cross-sectional structure along the 3-3 direction;

[0012] Figure 7 yes Figure 2 A schematic diagram of the cross-sectional structure along the 2-2 direction;

[0013] Figure 8 yes Figure 2 A schematic diagram of the cross-sectional structure along the 1-1 direction;

[0014] Fig. 9 This is a graph of temperature and time for steam curing of pipe segments according to an embodiment of the present application. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present application are provided in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0016] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0017] by Figure 2The first direction and the second direction identified in are used as reference directions. The beginning and the end of the conveyor belt are determined by the conveying direction of the conveyor belt. The beginning is the direction in which the conveyor belt departs, and the end is the direction in which the conveyor belt arrives.

[0018] Figure 2-Figure 9 The embodiment of the pipe segment processing facility of the present application is shown, including: a conveying system, a slurry system, a pipe segment production system and an embedded component production system 31. The conveying system and the embedded component production system 31 are located at both ends of the pipe segment production system, and the slurry system is located on the side of the pipe segment production system; the slurry system and the pipe segment production system can each be set up in two groups. One conveying system supplies sand and gravel to the two groups of slurry systems and pipe segment production systems. The cranes 41 in the two groups can be shared to reduce the occupied space and save costs.

[0019] The conveying system includes a discharge bin 11, a plurality of conveyor belts and a storage bin 120. The discharge bin 11 is used to receive sand and gravel transported by a transport vehicle, and convey the sand and gravel to the storage bin 120 through the conveyor belt, and then convey the sand and gravel in the storage bin 120 to the pulping system through the conveyor belt.

[0020] The pulping system is used to make sand and gravel into concrete. The pulping system includes a mixing subsystem 21, an aggregate subsystem 22, a powder subsystem 23, a water and admixture subsystem 24, a sand and gravel separator sewage treatment subsystem (not shown in the figure) and a distribution subsystem 25. The aggregate subsystem 22, the powder subsystem 23, the water and admixture subsystem 24, and the sand and gravel separator sewage treatment subsystem are connected to the mixing subsystem 21. The aggregate subsystem 22 is used to transport aggregates to the mixing subsystem 21, the powder subsystem 23 is used to transport powders to the mixing subsystem 21, the water and admixture subsystem 24 is used to transport water and admixtures to the mixing subsystem 21, and the sand and gravel separator sewage treatment subsystem is used to discharge and treat sewage from the mixing subsystem 21;

[0021] The segment production system includes a crane 41, a production track 42, a track conveying motor (not shown in the figure), an integral vibration table 43, a track trolley 44, a steaming kiln 45 and a demoulding device; the segment production system includes a crane 41, a production track 42, a track conveying motor, an integral vibration table 43, a track trolley 44, a steaming kiln 45 and a demoulding device; the production track 42 is laid on the ground, the crane 41 is arranged on the upper side of the production track 42, the track conveying motor is connected to the production track 42, so that the roller or chain on the production track 42 rotates, thereby driving the mold on the production track 42 to move; the integral vibration table 43 is arranged at the production track 42, and the track letter car (not shown in the figure) is used to carry the mold to put the mold on or take it off the production track 42; and the mold is transported or transported out of the steaming kiln 45, the steaming kiln 45 is arranged on the inner side of the production track 42, and the steaming kiln 45 is used to steam cure the concrete in the mold to form a segment; the demoulding device is arranged on the upper side of the production track 42, and is used to take out the segment in the mold.

[0022] In the present application, sand and gravel are transported to the pulping system through the conveying system, the pulping system makes the sand and gravel into concrete, and the made concrete is injected into the mold, and the pipe segments are manufactured in the pipe segment production system. In the pipe segment production system, the mold is transported by the production track 42, and the mold is vibrated by the integral vibration table 43 to compact the concrete. Finally, the pipe segment is steam-cured by the steaming kiln 45. In the whole process, fully automatic production is achieved, which greatly improves the production efficiency of the pipe segment, reduces the waste of human resources, and greatly improves the production quality of the pipe segment.

[0023] The unloading bin 11 of the conveying system receives the sand and gravel transported by the transport vehicle, and transports the sand and gravel to the storage bin 120 through the conveyor belt, and then transports the sand and gravel in the storage bin 120 to the pulping system through the conveyor belt.

[0024] In some embodiments, the transport vehicle pours the sand and gravel into the unloading bin 11, such as Figure 2 and Figure 3 As shown, the unloading bin 11 includes a horizontal portion 111 and an inclined portion 112. A first horizontal conveyor belt 12 is arranged along a first direction at the horizontal portion 111. A first inclined conveyor belt 13 is arranged at the end of the first horizontal conveyor belt 12. The end of the first horizontal conveyor belt 12 is located directly above the head end of the first inclined conveyor belt 13. The first inclined conveyor belt 13 is inclined along the first direction, and the height gradually increases from the head end to the tail end.

[0025] In some embodiments, Figure 2 and Figure 3 As shown, a second inclined conveyor belt 14 is disposed at the end of the first inclined conveyor belt 13 . The second inclined conveyor belt 14 is inclined along the second direction, and the height gradually increases from the head end to the tail end.

[0026] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, a material distributor 15 is provided at the end of the second inclined conveyor belt 14, and the material distributor 15 is provided on the storage bin 120, and the storage bin 120 includes a plurality of storage chambers arranged in parallel. A material distributor track 130 is provided in the middle of the storage bin 120, and the material distributor track 130 is arranged horizontally along the first direction, and the first inclined conveyor belt 13 and the material distributor track 130 are located on the same side of the second inclined conveyor belt 14. The material distributor 15 moves along the material distributor track 130 to distribute sand and gravel into each storage chamber.

[0027] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, a second horizontal conveyor belt 16 and a third horizontal conveyor belt 17 are respectively arranged at the bottom of the storage chamber on both sides of the material distribution track 130, and the second horizontal conveyor belt 16 and the third horizontal conveyor belt 17 are arranged side by side with the material distribution track 130. A fourth horizontal conveyor belt 18 is arranged at the end of the second horizontal conveyor belt 16 and the third horizontal conveyor belt 17. The fourth horizontal conveyor belt 18 is arranged along the second direction, and in the second direction, the fourth horizontal conveyor belt 18 is located between the material distribution track 130 and the second inclined track.

[0028] In some embodiments, Figure 2 , Figure 4-Figure 6 As shown, a fifth horizontal conveyor belt 19 is disposed at the end of the fourth horizontal conveyor belt 18, and the fifth horizontal conveyor belt 19 is disposed side by side with the material distribution track 130. A third inclined conveyor belt 110 is disposed at the end of the fifth horizontal conveyor belt 19, and the third inclined conveyor belt 110 is disposed obliquely along the second direction, and the height gradually increases from the head end to the tail end. A pulping system is disposed at the end of the third inclined conveyor belt 110.

[0029] By arranging the conveyor belts in different directions and at inclinations, the space occupied by the conveying system can be reduced and the efficiency of conveying sand and gravel can be improved.

[0030] In some embodiments, Figure 2 , Figure 6 and Figure 8 As shown, the slurry making system includes a stirring subsystem 21, an aggregate subsystem 22, a powder subsystem 23, a water and admixture subsystem 24, a sand and gravel separator sewage treatment subsystem and a material distribution subsystem 25. The slurry making system is used to make sand and gravel into concrete. The stirring subsystem 21 is located directly below the end of the third inclined conveyor belt 110 to receive the sand and gravel conveyed from the third inclined conveyor belt 110.

[0031] In some embodiments, the concrete strength grade of the segment is 50 MPa, the impermeability grade is P10, and the slump is 100 mm-120 mm. The mix design should take into account the early strength and late strength, impermeability and durability of the concrete.

[0032] 1) Main technical indicators of concrete material durability

[0033] ① Select cement with stable quality, low hydration heat and low alkali content. In order to improve the anti-seepage performance, it is advisable to add high-quality fly ash; select clean aggregates that are strong, durable, graded and well-shaped, try to reduce the amount of mixing water, and use high water reducing agent.

[0034] ②Maximum water-cement ratio: 0.36.

[0035] ③ The total amount of water-soluble chloride ions introduced into concrete raw materials (cement, mineral admixtures, aggregates, admixtures, mixing water, etc.) should not exceed 0.06% of the weight of the cementitious material.

[0036] ④Alkali content: ≤3kg / cm 3 .

[0037] ⑤ Chloride ion diffusion coefficient D RCM <3×10 -12 m 2 / S.

[0038] 2) Concrete raw material performance indicators

[0039] ① Cementitious materials

[0040] In order to achieve the requirements of high performance and high durability of concrete, high-quality cement, mineral admixtures such as slag powder and fly ash with excellent performance, or composite cementitious materials formed by the above two should be used when preparing concrete; the minimum and maximum dosage of cementitious materials per cubic meter of concrete should be limited, and the dosage of cementitious materials should be 360-480kg / m 3 .

[0041] a It is advisable to use silicate cement with a strength grade not less than 42.5.

[0042] b. Alkali content is less than 0.60%, and C3A content should not exceed 8%;

[0043] The specific surface area of ​​cement should not be less than 300m 2 / kg, and not higher than 400m 2 / kg (Portland cement), the residue on 45μm square hole sieve of ordinary Portland cement is ≤5%;

[0044] d. Fly ash: The fly ash raw materials shall meet the standards of Grade II or above specified in the standard of Fly Ash for Cement and Concrete (GB / T1596);

[0045] e Comprehensive requirements: Try to reduce the amount of cement in cementitious materials. The blending ratio of fly ash in admixture materials should be adjusted in different seasons. The amount of high-quality fly ash is generally controlled at 10%-20%.

[0046] ②Fine aggregate

[0047] Alkali-reactive fine aggregates shall not be used. Medium sand shall be used, and the quality shall comply with the "Quality and Inspection Standards for Sand and Stone for Ordinary Concrete" (JGJ 52). The fineness modulus of 2.3 to 3.0 shall comply with the particle grading of Zone II. The mud content in the sand shall be ≤2%, and the mud block content shall be ≤1%. Sea sand, mountain sand, severely weathered and porous sand shall not be used.

[0048] ③Coarse aggregate

[0049] Alkali-reactive aggregates shall not be used. Crushed stone shall be used. The quality shall comply with the "Quality and Inspection Standards for Sand and Stone for Ordinary Concrete" (JGJ 52). The gradation shall be good, the maximum particle size shall not exceed 31.5 mm, and the recommended particle size is 5 to 25 mm. The chloride ion content of the crushed stone shall be ≤0.06%, the mud content shall be ≤1%, the mud block content shall be ≤0.5%, the water absorption rate shall be ≤1%, and the needle-like content shall be ≤15%.

[0050] ④ Water for concrete mixing

[0051] The water used for mixing concrete should be drinking water that does not contain substances that affect the normal coagulation and hardening of cement or cause corrosion of steel bars, and its quality should meet the requirements of the "Standard for Water Used in Concrete" (JGJ63).

[0052] ⑤Additives

[0053] a. The quality of admixtures shall comply with the provisions of "Concrete Admixtures" (GB / 8076) and related specifications. The use of admixtures shall comply with the "Technical Specifications for the Application of Concrete Admixtures" (GB50119).

[0054] b. According to the performance requirements of concrete, polycarboxylic acid water reducer can be used with a water reduction rate of >18%, and it has good matching performance with gel materials such as cement and admixtures.

[0055] By selecting and proportioning the above materials, the amount of cement can be controlled to reduce the hydration heat and shrinkage cracks. Before mixing concrete, measure the water content of sand and gravel, and adjust the proportion according to the change of water content. The mixing time is not less than 3 minutes, and the slump is 100-120mm. The allowable error of material weighing is: cement: ±2%; coarse and fine aggregate: ±3%; water and additives ±2%.

[0056] Through the above-mentioned material settings, admixtures are metered and mixed in the slurry making system to produce concrete, thereby ensuring the durability of the segments, reducing the impact on the quality of the segments due to concrete problems, and ensuring that the segments have higher quality.

[0057] In some embodiments, Figure 1 As shown, sand and gravel are transported to the slurry making system through the conveying system. The slurry making system prepares the sand and gravel into concrete, and the concrete is input into the segment production system. The segment production system injects the concrete into the mold, and the concrete solidifies in the mold to form the segment.

[0058] In some embodiments, the manufactured concrete is injected into the mold with embedded parts through the material distribution subsystem 25. The preparation of embedded parts is first introduced below. Figure 1 As shown, the embedded parts are manufactured by the embedded parts production system 31, and the embedded parts are composed of a plurality of steel bar raw materials. The preparation of the embedded parts includes the following steps:

[0059] 1) Cut the ingredients and remove harmful substances such as rust, scale, grease, etc. on the surface of the steel bars before cutting them.

[0060] 2) Straighten the steel bars so that there is no local bending. The coiled steel bars and the main bars that need to be bent should be straightened.

[0061] 3) Cut, bend and arc-form the steel bars. The steel bars shall be cut and bent as required by the design drawings.

[0062] 4) Welding of steel bars. When welding steel bars, they must be made on a template that meets the design requirements. Using a carbon dioxide welding machine to process and weld the steel bar skeleton can prevent the steel bars from being burned and eliminate the welding slag produced by ordinary arc welding, thereby improving the bond strength of concrete to the steel bars.

[0063] The embedded parts can be obtained through the above steps, which have the advantage of high firmness, thereby ensuring that the pipe segments have high quality.

[0064] In some embodiments, before placing the embedded parts in the mold, the mold needs to be cleaned and coated with a release agent, and then the embedded parts are placed in the mold, and then the mold is closed and concrete is injected. The specific steps are as follows:

[0065] 1) Mold cleaning

[0066] All the concrete residues on the mold should be removed. No concrete residues should be left on any part of the inner surface of the mold after cleaning. The anti-rust protective film on the mold surface must be carefully cleaned when the mold is used for the first time. No residues should be left. The inner surface of the mold should be cleaned with a sponge, asbestos cloth and a plastic shovel. It is strictly forbidden to use sharp tools to scrape the mold surface. In particular, the concrete residues on the grouting hole seat and hand hole seat in the key parts of the mold must be thoroughly cleaned. When cleaning the outer surface of the mold, special attention should be paid to clearing the concrete residues on the end mold and side mold. After all the concrete residues are peeled off, all debris should be removed from the inner surface of the mold. No debris should be left. The contact surface between the side mold, end mold and the base should be wiped clean with a rag every time the mold is cleaned to prevent dust from falling and affecting the accuracy of the mold. At the same time, apply engine oil for maintenance.

[0067] 2) Spraying release agent

[0068] Before spraying the release agent, check whether there is any concrete residue on the inner surface of the mold. If there is, it should be reworked and cleaned. Only molds that meet the requirements can be sprayed with the release agent. Use a mist sprayer to spray first, then wipe it evenly with a mop. Make sure that the entire inner surface of the mold is evenly covered with a thin layer of release agent. If there is dripping release agent accumulation at the bottom of both ends, use cotton yarn to clean it.

[0069] 3) Assembly

[0070] Before assembling the mold, check whether all parts and positions of the mold are clean, whether the release agent is sprayed evenly, and clean and fill the deficient areas. Check whether the joint strips between the side template and the end plate are displaced or fallen off. If so, correct it in time.

[0071] 4) Embedded parts installation

[0072] After installing the plastic protective block at the designated position on the embedded part, the crane cooperates with the lifting device to lift the embedded part into the mold according to the specifications. After the embedded part is placed in the mold, it is necessary to check whether it affects the installation of the embedded part and whether the bottom protective layer is symmetrical. The embedded parts with protective layers on any side greater than the specified tolerance or severely twisted shall not be used and shall be lifted out of the mold and transported away. After the embedded parts are placed in the mold, each embedded part shall be corrected one by one as required. The horizontal and vertical bolt hole positions, protective layers, etc. shall be corrected and measured, and the acceptance form shall be filled out.

[0073] Place the grouting pipe, rubber gasket, plastic sleeve, hand hole bolt hole former and spiral structural steel bar at the designated position near the mold. Assemble the grouting pipe and the mold positioning core and check whether they are tightened to prevent leakage. When placing the hand hole bolt hole former, first put the plastic sleeve, spiral steel bar and rubber gasket on the hole former, insert the positioning bent core into the mold positioning hole, and tighten it after placement. The head of the positioning core must be fully inserted into the mold hole of the hand hole seat to prevent gaps due to loose connections, which may cause leakage. Check whether all accessories are installed completely and firmly as required. If they do not meet the requirements, they must be corrected. After the embedded parts are fully installed, close the top mold cover, tighten the cover bolts, and pour the segment concrete.

[0074] In some embodiments, Figure 2 and Figure 8 As shown, after the embedded parts are placed in the mold, concrete is injected into the mold through the material distribution subsystem 25. The material distribution subsystem 25 is arranged at the lower side of the mixing subsystem 21, and the material distribution subsystem 25 includes an upper material distribution track 251, an upper material distribution vehicle 252, a lower material distribution track 253 and a lower material distribution vehicle 254. The upper material distribution track 251 and the lower material distribution track 253 are arranged along a first direction, and the upper material distribution track 251 is located on the upper side of the lower material distribution track 253. The upper material distribution vehicle 252 can move along the upper material distribution track 251 in the first direction; the lower material distribution vehicle 254 can move along the lower material distribution track 253 in the first direction, and the lower material distribution vehicle 254 can also move in the second direction.

[0075] In some embodiments, Figure 2 and Figure 8 As shown, the concrete prepared from the mixing subsystem 21 flows into the upper material distribution vehicle 252, and the upper material distribution vehicle 252 moves to the top of the lower material distribution vehicle 254, and discharges the concrete into the lower material distribution vehicle 254. The lower material distribution vehicle 254 transports the concrete to the top of the mold, and discharges the concrete into the mold where the embedded parts have been placed. During the casting process of the pipe segment, the material is discharged in two layers. The layered discharge method can reduce surface bubbles. The method is to evenly distribute about 1 / 3 to 1 / 2 of the amount of concrete required, and the discharge is completed twice. The interval between each layer is about 40 seconds, which can improve the density of the concrete and ensure that the pipe segment has a high quality.

[0076] In some embodiments, Figure 2 , Figure 7 and Figure 8As shown, the segment production system includes a crane 41, a production track 42, a track conveying motor, an integral vibration table 43, a track trolley 44, a steaming kiln 45 and a demoulding device. The crane 41 is used to place the mold on the production track 42, and the track conveying motor is connected to the production track 42 to rotate the roller or chain on the production track 42, thereby driving the mold on the production track 42 to move. The mold is transported to the integral vibration table 43 through the production track 42, and then the lower layer distribution car 254 is moved to the top of the integral vibration table 43, and the lower layer distribution car 254 is opened. The concrete in the lower layer distribution car 254 is injected into the mold, and then the integral vibration table 43 is started to vibrate the mold to compact the concrete in the mold. After the vibration is completed, the production track 42 transports the mold to the steaming kiln 45, and the track trolley 44 transports the mold from the production track 42 and transports it to the steaming kiln 45, and the mold is steam-cured in the steaming kiln 45 to accelerate the solidification of the concrete. After the curing in the steaming kiln 45 is completed, the mold is transported out of the steaming kiln 45 by the rail carrier 44, and the pipe segment in the mold is taken out by the demoulding device. Thus, the preliminary manufacturing of the pipe segment is completed.

[0077] In some embodiments, Figure 2 As shown, the production track 42 includes a first track 421, a second track 422 and a third track 423. The first track 421 and the third track 423 are arranged along the second direction, the first track 421 is adjacent to the crane 41, and the third track 423 is adjacent to the pulping system. The second track 422 is arranged between the two ends of the first track 421 and the third track 423, the second track 422 is adjacent to the storage bin 120, and the second track 422 is arranged along the first direction.

[0078] In some embodiments, after the crane 41 places the mold on the first track 421, the mold then moves to the integral vibration table 43 through the first track 421, the second track 422 and the third track 423 in sequence for grouting. Use reasonable vibration points and vibration time to reduce floating slurry and pores. When the concrete is poured into 1 / 3 of each mold, start to open the air valve for vibration. The vibration time depends on the fluidity of the concrete, generally 3 to 5 minutes, and no over-vibration is allowed, and it is not allowed to exceed 10 minutes. And by observation, if no tiny bubbles escape from the surface of the concrete, stop the vibration. Use reasonable vibration points and vibration time to reduce floating slurry and pores. This can improve the density of the concrete and ensure that the pipe segment has a higher quality.

[0079] In some embodiments, Figure 2As shown, the production track 42 also includes a plurality of auxiliary tracks 426. The auxiliary tracks 426 are arranged along the second direction. The auxiliary tracks 426 are adjacent to the third track 423 and are arranged in parallel with the third track 423. An integral vibration table 43 is provided on the auxiliary track 426. After grouting is completed, the mold can be moved to the integral vibration table 43 on the auxiliary track 426 for vibration to avoid affecting the grouting process, thereby greatly improving the production efficiency of the pipe segment.

[0080] In some embodiments, Figure 2 As shown, the production track 42 also includes a fourth track 424 and a fifth track 425. The fourth track 424 and the fifth track 425 are arranged along the first direction. The fourth track 424 is on the same side as the first track 421, and the fifth track 425 is on the same side as the third track 423. A plurality of steaming kilns 45 and a repair area are arranged in the area between the fourth track 424 and the fifth track 425. After the vibration is completed, the mold enters the fifth track 425 from the third track 423, and the track mother-and-child car 44 transports the mold from the fifth track 425 and transports it to the steaming kiln 45. In the steaming kiln 45, water collection and finishing are first performed to modify the outer arc surface, ensure the curvature, eliminate shrinkage cracks, and improve the surface finish. Concrete finishing is divided into: rough finishing, medium finishing and fine finishing. Rough finishing: Use an aluminum alloy pressure ruler to scrape and remove excess concrete (or fill the depression), and perform rough grinding. Middle plastering: After the concrete has absorbed water, use a putty spoon to smooth the surface, making the pipe surface smooth and flat. Fine polishing: Use a long spoon to smooth the surface, striving to make the surface bright and free of putty spoon marks. After the pipe segment is poured, the water absorption and plastering processes are carried out in the kiln, reducing the collapse and uneven composition caused by transportation vibration.

[0081] In some embodiments, steam curing is performed after water absorption and plastering. The purpose of steam curing is to achieve demoulding strength through steam curing, creating conditions for each mold to produce more than three times a day. It is required that the demoulding strength of concrete after steam curing reaches 15MPa. Fig. 9 Instructions: The steps of steam curing are as follows:

[0082] 1) After the segments are formed, they are covered with film paper after reaching initial setting and then put into the steam curing kiln for steam curing; each steam curing kiln 45 can store 8 segments;

[0083] 2) Stalling stage: Stalling in the steaming kiln for no less than 2 hours; the time from molding to steam input is the stalling time;

[0084] 3) Heating stage: The temperature in the steam curing kiln is raised by 10℃~15℃ per hour to make the temperature in the steam curing kiln reach between 50℃ and 60℃; this prevents the expansion of the concrete components due to the temperature increase and damage to the internal structure.

[0085] 4) Constant temperature stage: Steam curing at a constant temperature between 50 and 60°C for 1-2 hours; the maximum temperature shall not exceed 60°C.

[0086] 5) Cooling stage: The temperature in the steaming kiln drops by 15℃~20℃ per hour, and the cooling stage lasts for 1-2 hours;

[0087] 6) After the cooling time is reached, the mold is removed from the steaming kiln and demoulded.

[0088] During the steam curing process, the temperature can be recorded every hour, and the steam volume can be adjusted in time to control the temperature. This can accurately control the heating, constant temperature and cooling process of the pipe segment to ensure that the pipe segment has a high production quality.

[0089] During the cooling stage, the concrete will lose water and shrink on the surface. In order to prevent the concrete from shrinking due to the large temperature difference between the inside and outside, which will lead to temperature difference cracks, demoulding is allowed only after the steam curing is completed and the temperature is lowered for 1.5 hours. It must be strictly enforced. After the segment is demoulded, water curing should be strengthened to improve the later growth of concrete.

[0090] After the curing is completed, the concrete in the segment solidifies into a segment, and the rail carriage 44 transports the mold from the steaming kiln 45 to the fourth track 424. Then the demolding device takes the segment out of the mold and puts it into the repair area, where the segment is repaired and cooled.

[0091] In some embodiments, a small amount of appearance defects that do not affect the use of the structure during the production process of the segment are repaired or repaired as follows: The segment repair is performed immediately after the segment is demoulded. After the segment is demoulded, the segment is lifted from the mold with a hanger and placed on a repair bracket. The surface of the segment is wiped with a damp cloth or cotton yarn to find bubbles on the concrete surface and hidden bubbles for repair.

[0092] The common defects of the segments include the following aspects:

[0093] 1) Honeycomb: The concrete surface lacks cement mortar, resulting in exposed gravel.

[0094] 2) Non-penetrating shrinkage cracks with a width of less than 0.2 mm.

[0095] 3) The concrete on the outer surface of the segment is damaged and corners are chipped.

[0096] 4) The pipe segments have bumps on the edges and corners, are warped, have flashing edges and ribs, etc.

[0097] 5) The surface of the segment is rough, peeling, sandy, and contains a small amount of bubbles.

[0098] If there are defects in the pipe segment but it does not reach the scrap standard specified in the specification, it should be repaired according to the following method.

[0099] General wear and tear does not need to be treated. The pores on the outer surface of the pipe segment need to be generally modified. Large pores should be avoided as much as possible. The pores on the water stop with a diameter greater than 2mm should be modified by secondary filling.

[0100] For non-penetrating cracks with a width of 0.1mm to 0.2mm, the small cracks of the pipe segment are filled with cement mixed with rubber. All fillers should be tightly combined with the crack surface and combined well. When the first filling material shrinks, the second filling is carried out.

[0101] For the repair of chipping and damage:

[0102] 1) Clean up the residual concrete at the broken corners and damaged parts, and try to straighten the edge of the broken corners. Clean the damaged surface of the pipe segment with a wire brush and rinse it with clean water.

[0103] 2) Fill the mortar layer by layer, and finally use a spatula to level and smooth it. Each filling should not exceed 2cm, and the next piece of filling should press the previous piece of repair.

[0104] 3) When the collapse angle is large, the newly repaired mortar will fall off or deform, and it is necessary to erect a formwork before filling the mortar.

[0105] 4) At the same time, attention should be paid to the amount of cement mixed to match the color of the repaired surface after painting.

[0106] The above defects should be repaired or applied with cement mortar mixed with glue, and a proper amount of white cement should be added to adjust the color, and the color should be as close to the original color as possible after repair. Its characteristics are good adhesion with the old concrete interface, and a certain water retention and shrinkage prevention effect, and the strength can reach more than 50MPa in 7 days. The color of the repaired or treated parts should be basically consistent with the original color of the pipe segment to maintain the overall aesthetic effect.

[0107] In some embodiments, after the repair is completed, the pipe segment is transported to the pool by a transport vehicle for pool curing. After the pipe segment is demolded, it is cooled to a temperature difference of no more than 20°C from the natural temperature and then put into the pool for curing to ensure the curing quality of the pipe segment. The purpose of pool curing is to ensure that the pipe segment is replenished with water in time after demolding, to ensure the increase of concrete strength, and to ensure that the anti-seepage performance meets the design requirements. The finished pipe segment is upright and placed in the pool for curing at 90° to the pool floor. The pool water should flood the top surface of the pipe segment to ensure that the entire pipe segment is soaked in water. The water quality for pool curing uses clean tap water, and the water level of the pool should be more than 5 cm higher than the top of the pipe segment. When the water is low, it should be replenished in time to keep the water clean; the pipe segment should be cured for no less than 14 days. After the pipe segment is cured in the pool for 14 days, it is transferred to the storage yard by a crane for natural curing for 14 days. The pipe segment can be shipped when it reaches the design strength at the age of 28 days.

[0108] In some embodiments, before the segments leave the factory, the finished segments are sampled and inspected to ensure the quality of the segments. The segment product inspection includes: segment accuracy inspection, size and appearance inspection, segment three-ring assembly, leak detection inspection, segment pull-out performance inspection and segment bending resistance inspection.

[0109] 1) Segment accuracy inspection (allowable tolerance) requirements are shown in Table 1.

[0110] Table 1 Segment accuracy (allowable tolerance) requirements

[0111]

[0112]

[0113] 2) Dimensions and appearance inspection

[0114] ① Inspection method: Use 0-1200mm vernier caliper to inspect the width and thickness of the segment, and use sample and feeler gauge to inspect the arc length and chord length of the segment. Visual inspection: used for appearance quality defect inspection. Inspection rate 100%. There should be no serious defects in the appearance quality of the segment.

[0115] ② The lining surface should be dense, smooth, flat, with intact edges and no defects, pitting or missing reinforcement. The appearance quality of the segments should meet the relevant requirements of Table 2. Effective protection measures should be taken for the segments during storage and transportation. Before assembling the segments, they should be strictly inspected to ensure that there is no peeling or defect in the sealing gasket grooves and plane corners. If they do not meet the requirements, they should be repaired. The larger pits on both sides of the sealing gasket groove and the bottom surface should be filled with ultra-early strength and fast-hardening cement. They can only be used after passing the inspection. When the segment surface has missing edges and corners, concrete peeling, and non-penetrating cracks with a width of 0.1mm-0.2mm, the segment must be repaired. The strength of the repaired segment shall not be lower than the segment strength, and there shall be no large color difference.

[0116] Table 2 Appearance quality requirements of concrete segments

[0117]

[0118]

[0119] 3) Segment three-ring assembly

[0120] This test randomly selects three-ring segments produced by different molds and assembles them together on a horizontal assembly inspection table to check whether their inner and outer diameters as well as the widths of the annular and longitudinal seams meet the design requirements.

[0121] A horizontal assembly test should be carried out after every 1000 rings are produced. The horizontal assembly test should comply with the requirements of Table 3.

[0122] Table 3 Segment assembly allowable error table

[0123] Serial number project Testing requirements Detection Methods Allowable error (mm) 1 Circumferential gap 6 points per seam Feeler gauge 2 2 Longitudinal gap Measure 2 points per seam Feeler gauge 2 3 Inner diameter after ringing Measure 4 strips (without pad) Steel measuring tape ±2 4 Outer diameter after ringing Measure 4 strips (without pad) Steel measuring tape +6，-2

[0124] 4) Leakage test

[0125] ① The finished segments should be regularly inspected for leaks. The leak detection standard is based on the designed anti-seepage pressure of 0.8MPa at a constant pressure for 3h, and the water seepage depth should not exceed 50mm.

[0126] ② The inspection equipment, including the support seat for fixing the test piece, should adopt a rigid support, and the fastening screw and the inspection frame steel plate should have sufficient rigidity. The sealing surface and the pipe segment should be in close contact, and the joint should be sealed with a rubber gasket. The water inlet should be evenly distributed on the axis of the water pressure surface, and there should be no less than 4 water inlets when the standard block leak test is performed.

[0127] The technical requirements for inspection instruments are shown in Table 4. The pressure gauge should be calibrated within the specified period.

[0128] Table 4 Technical requirements for leak detection instruments

[0129]

[0130] ③ Inspection method: First, pressurize and inspect the sealing condition. After ensuring that the inspection device is leak-proof, add water to the inspection area for leak detection. The water pressure is increased in stages from 0, the first stage to 0.2MPa, the second stage to 0.4MPa, the third stage to 0.6MPa, the fourth stage to 0.8MPa, ... and each stage of pressure is maintained for 10 minutes. After reaching the designed pressure value, the pressure is maintained for 3 hours until the inspection is completed. During the pressure maintenance process, carefully observe whether there is water leakage on the end faces of the components, and keep records.

[0131] Observe the changes in water pressure. During the pressure holding time after each level of pressurization, ensure the stability of the water pressure. If the water pressure drops, replenish it immediately to ensure that the water pressure can be maintained at the specified pressure value.

[0132] After applying water pressure and maintaining it for 3 hours, there should be no leakage on any surface of the component, and the water seepage height on any surface should not exceed 50mm, which meets the requirements.

[0133] ④ Inspection technology guarantee measures: the water-resistance inspection platform must have sufficient rigidity and not deform after pressurization to meet the inspection requirements.

[0134] The sealing tensioning screw must be locked and the stiffness of the tensioning screw must meet the inspection pressure requirements.

[0135] The accuracy of the pressure automatic control test pump must meet the inspection requirements and have good sensitivity. It must replenish pressure in time when pressure leaks to ensure constant pressure.

[0136] The segment production shall be carried out strictly in accordance with the segment production process, and the segment leak test can only be carried out after the segment anti-seepage test pieces have passed the test.

[0137] The segment inspection process is monitored and guided throughout the process to ensure that the entire inspection process is carried out according to the established plan. Rough or illegal operations are strictly prohibited.

[0138] 5) Segment pull-out performance test

[0139] ① The pull-out test of the pipe segment is to carry out a destructive pull-out test on the embedded components of the central lifting hole of the pipe segment to detect the maximum pull-out force it can withstand under the action of external force.

[0140] ② Inspection equipment: the main inspection instruments and technical indicators for the segment pull-out performance inspection are shown in Table 5.

[0141] Table 5 Technical indicators of testing instruments

[0142]

[0143] ③ Inspection method: place the jack bracket or pad on the bolt tube of the grouting hole, align the center of the bracket or pad with the center of the grouting hole, then stand the jack on the bracket or pad, align the jack through-hole with the center of the grouting hole, screw the puller screw into the jack through-hole, and put the locking nut on the upper part.

[0144] The displacement is observed using a dial indicator with a range of 50mm (accuracy 0.01mm), which is placed in the middle of the end of the puller bolt and fixed with a magnetic base.

[0145] A graded loading method is adopted. When the load is less than the short-term load test value under normal use, each level of load is 20% of the load value; when the load is greater than the short-term load value, each level of load is 10% of the load value; when the load is close to the bearing capacity load test value, each level of load is 5% of the bearing capacity test load design value, and the load time for each level is not less than 5 minutes.

[0146] Keep original records of the inspection process, including the loading time of each load level, displacement observation values, tension and failure characteristics when failure occurs, etc.

[0147] 6) Segment bending test

[0148] ① Test the bending resistance of the pipe segment to determine the crack load and failure load values, and test the deflection and horizontal displacement of the pipe segment under load.

[0149] ② The technical standards of the testing equipment and instruments for testing the bending resistance of pipe segments shall comply with the requirements of Table 6.

[0150] Table 6 Technical standards for testing instruments

[0151]

[0152] ③ Load design requirements, design load (standard block), when the crack width of the pipe segment is 0.20mm, the cumulative applied load (concentrated force) shall not be less than the design requirements.

[0153] ④ Inspection method: adopt the method of simply supported two-point symmetrical concentrated loading. The two supports are the intersections of the segment's circumferential direction, end face and inner side face. The loading point is the middle of the segment's outer circle, and the distance between the two concentrated load points is 450mm from the midpoint.

[0154] The graded loading method shall be adopted. The loading value of each level shall comply with the provisions of Table 7. The loading time of each level shall not be less than 5 minutes. The displacement of each measuring point under each level of load value shall be recorded and the next level of load shall be applied.

[0155] Table 7 Bending performance test loading values

[0156]

[0157] When the first crack appears, hold the load for 10 minutes, carefully observe the development and distribution of the crack with a reading microscope, and record the crack width. The cumulative applied load value when the first crack occurs is taken as the actual measured value of the cracking load.

[0158] When the load reaches the design load, the load should be continued for 30 minutes, the development of the cracks in the pipe segment should be observed, the maximum crack width should be recorded, and finally the load should be unloaded and the inspection should be terminated.

[0159] The calculation is based on the interpolation equation of the pressure indicator value in the jack calibration certificate. When the pressure indicator of the jack is used to measure force, the pressure indicator value is:

[0160] F=14.0174p-2.3406

[0161] Where: F——standard force value (kN)

[0162] p——Pressure indicator value (MPa)

[0163] Displacement observation setting point, horizontal displacement measurement point: set at the near end surface of the outer arc surface of the segment.

[0164] Vertical displacement measuring points: located at the midpoint of the inner arc surface of the segment and at the two load application points, as well as at the near end surface of the outer arc surface of the segment. Each measuring point is equipped with a dial indicator and fixed with a bracket.

[0165] Crack width observation: Use a reading microscope with an accuracy of 0.01mm to observe the maximum crack width on the bottom surface of the pipe segment.

[0166] Inspection records and inspection results record the original data of the inspection process, including the loading time of each load level, displacement observation value, crack width when cracks appear and the maximum crack width under subsequent load levels, as well as the characteristics when damage occurs and the location of each crack after damage.

[0167] The above inspection can ensure the quality of the segments before leaving the factory.

[0168] In the present application, sand and gravel are transported to the pulping system through the conveying system, the pulping system makes the sand and gravel into concrete, and the made concrete is injected into the mold, and the pipe segments are manufactured in the pipe segment production system. In the pipe segment production system, the mold is transported by a production track, and the mold is vibrated by an integral vibration table to compact the concrete. Finally, the pipe segments are steam-cured in a steam-curing kiln. In the whole process, fully automatic production is achieved, which greatly improves the production efficiency of the pipe segments, reduces the waste of human resources, and greatly improves the production quality of the pipe segments.

[0169] The above are merely embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structural transformations made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A segment processing facility, characterized in that: include: A conveying system, a pulping system and a segment production system, wherein the conveying system is located at one end of the segment production system, and the pulping system is located at the side of the segment production system; The conveying system includes a discharge bin, a plurality of conveyor belts and a storage bin, wherein the discharge bin is used to receive sand and gravel transported by a transport vehicle, a group of the conveyor belts is used to transport the sand and gravel to the storage bin, and another group of the conveyor belts transports the sand and gravel in the storage bin to the pulping system; The slurry making system is used to make the sand and gravel into concrete. The slurry making system includes a stirring subsystem, an aggregate subsystem, a powder subsystem, a water and admixture subsystem, a sand and gravel separator sewage treatment subsystem and a distribution subsystem. The aggregate subsystem, the powder subsystem, the water and admixture subsystem and the sand and gravel separator sewage treatment subsystem are connected to the stirring subsystem; the aggregate subsystem is used to transport aggregates to the stirring subsystem, the powder subsystem is used to transport powders to the stirring subsystem, the water and admixture subsystem is used to transport water and admixtures to the stirring subsystem, and the sand and gravel separator sewage treatment subsystem is used to discharge and treat sewage from the stirring subsystem; the distribution subsystem is used to distribute the concrete to the segment production system; The segment production system includes a crane, a production track, a track conveying motor, an integral vibration table, a track trolley, a steaming kiln and a demoulding device; the production track is laid on the ground, the crane is arranged on the upper side of the production track, the track conveying motor is connected to the production track to rotate the roller or chain on the production track, and then drive the mold on the production track to move; the integral vibration table is arranged at the production track, the track trolley is used to carry the mold to put the mold on or remove the mold from the production track; and transport the mold into or out of the steaming kiln, the steaming kiln is arranged on the inner side of the production track, and the steaming kiln is used to steam-cure the concrete in the mold to form a segment; the demoulding device is arranged on the upper side of the production track, and is used to take out the segment in the mold.

2. The segment processing facility according to claim 1, characterized in that: The unloading bin comprises a horizontal portion and an inclined portion, a first horizontal conveyor belt is arranged at the horizontal portion along a first direction, a first inclined conveyor belt is arranged at the end of the first horizontal conveyor belt, the end of the first horizontal conveyor belt is located directly above the head end of the first inclined conveyor belt, and the first inclined conveyor belt is arranged obliquely along the first direction; A second inclined conveyor belt is provided at the end of the first inclined conveyor belt, and the second inclined conveyor belt is inclined along the second direction; a distributor is provided at the end of the second inclined conveyor belt, and the distributor is arranged on the storage bin, and the storage bin includes a plurality of storage chambers arranged in parallel; a distributor track is provided in the middle of the storage bin, and the distributor track is arranged horizontally along the first direction, and the first inclined conveyor belt and the distributor track are located on the same side of the second inclined conveyor belt; the distributor moves along the distributor track to distribute the sand and gravel into each of the storage chambers; A second horizontal conveyor belt and a third horizontal conveyor belt are respectively arranged at the bottom of the storage chamber on both sides of the material distribution track, the second horizontal conveyor belt and the third horizontal conveyor belt are arranged side by side with the material distribution track, and a fourth horizontal conveyor belt is arranged at the ends of the second horizontal conveyor belt and the third horizontal conveyor belt, the fourth horizontal conveyor belt is arranged along the second direction, and the fourth horizontal conveyor belt is located between the material distribution track and the second inclined track in the second direction; A fifth horizontal conveyor belt is arranged at the end of the fourth horizontal conveyor belt, and the fifth horizontal conveyor belt is arranged side by side with the material distribution track. A third inclined conveyor belt is arranged at the end of the fifth horizontal conveyor belt, and the third inclined conveyor belt is inclined along the second direction; the third inclined conveyor belt is used to transport the sand and gravel to the pulping system.

3. The segment processing facility according to claim 2, characterized in that: The material distribution subsystem is arranged at the lower side of the stirring subsystem, and the material distribution subsystem includes an upper material distribution track, an upper material distribution vehicle, a lower material distribution track and a lower material distribution vehicle. The upper material distribution track and the lower material distribution track are arranged along the first direction, and the upper material distribution track is located on the upper side of the lower material distribution track; the upper material distribution vehicle can move in the first direction along the upper material distribution track; the lower material distribution vehicle can move in the first direction along the lower material distribution track.

4. The segment processing facility according to claim 3, characterized in that: The production track includes a first track, a second track and a third track, the first track and the third track are arranged along the second direction, the first track is adjacent to the crane, and the third track is adjacent to the pulping system; the second track is arranged between the two ends of the first track and the third track, the second track is adjacent to the storage bin, and the second track is arranged along the first direction.

5. The segment processing facility according to claim 4, characterized in that: The production track also includes multiple auxiliary tracks, which are arranged along the second direction. The auxiliary tracks are adjacent to the third track and arranged in parallel with the third track. An integral vibration table is provided on each of the auxiliary tracks. After grouting is completed, the mold can be moved to the integral vibration table on the auxiliary track for vibration.

6. The segment processing facility according to claim 5, characterized in that: The production track also includes a fourth track and a fifth track, and the fourth track and the fifth track are arranged along the first direction. The fourth track is on the same side as the first track, and the fifth track is on the same side as the third track. A plurality of steaming kilns are arranged in the area between the fourth track and the fifth track.

7. A method for processing a pipe segment, characterized in that: Processing the pipe segment using the pipe segment processing facility according to any one of claims 1 to 6, transporting sand and gravel to a pulping system through a conveying system, the pulping system preparing the sand and gravel into concrete, and inputting the concrete into a pipe segment production system, the pipe segment production system injecting the concrete into a mold, and the concrete solidifying in the mold to form the pipe segment; Before injecting concrete into the mold, the mold is first cleaned and an isolation agent is applied, and then the embedded parts are placed in the mold, and then the mold is closed and concrete is injected. The specific steps are as follows: 1) Mold cleaning All the residual materials on the mold are removed, and the inner surface of the mold is cleaned with a sponge block, asbestos cloth and a plastic shovel; after each cleaning, the mold is wiped clean with a sponge block and asbestos cloth, and engine oil is applied for maintenance; 2) Spraying release agent First, use a mist sprayer to spray the release agent, and then wipe it evenly with a mop to make the entire inner surface of the mold evenly covered with a thin layer of release agent; 3) Assembly Assemble the side template and the end plate of the mold together, and check whether the joint seam rubber strip is displaced or falls off; 4) Embedded parts installation After installing the plastic protective card block on the embedded part, calibrate and measure the horizontal and vertical bolt hole positions and the protective layer. After confirming that the size and placement position of the embedded part are qualified, install the embedded part; hang the embedded part into the mold, check whether the bottom protective layer is symmetrical after the embedded part is placed in the mold, and calibrate each embedded part after the embedded part is placed in the mold.

8. The segment processing method according to claim 7, characterized in that: After the vibration is completed, the mold moves from the third track to the fifth track, and the track carrier transports the mold out of the fifth track and transports it to the steam-curing kiln, where the concrete is subjected to water removal and surface finishing; After the concrete is water-absorbed and plastered, it is steam-cured in the steam-curing kiln to shape the tube segment. After steam-curing, the demoulding strength of the concrete reaches 15 MPa. The steps of steam curing are as follows: 1) The tube segments are formed and covered with film paper after reaching initial setting, and the steam curing kiln is used for steam curing; 2) Stalling stage: Stalling in the steaming kiln for no less than 2 hours; 3) Heating stage: the temperature in the steam curing kiln is increased by 10°C to 15°C per hour, so that the temperature in the steam curing kiln reaches between 50°C and 60°C; 4) Constant temperature stage: in the steam curing kiln, steam curing at a constant temperature between 50 and 60° C. for 1 to 2 hours; 5) Cooling stage: In the steaming kiln, the temperature is lowered by 15°C to 20°C per hour, and the cooling stage lasts for 1-2 hours; 6) After the cooling time is reached, the mold is transported out of the steaming kiln and demoulded.

9. The segment processing method according to claim 8, characterized in that: The demoulding device takes the tube segment out of the mold and puts it into a repair area, where the tube segment is repaired and cooled; After the segment is demoulded, it is placed on a repair bracket, and the surface of the segment is wiped with a damp cloth or cotton yarn to find out the defects on the surface of the segment and repair them; The defects of the segment include the following aspects: 1) Honeycomb: The surface of the segment lacks cement mortar, resulting in exposed gravel; 2) Non-penetrating shrinkage cracks with a width of less than 0.2 mm; 3) The concrete on the outer surface of the segment is damaged or the corners are chipped; 4) The segments have bumps on the edges and corners, warping, unevenness, and burrs; 5) The surface of the segment is rough, peeling, sandy, and has a small amount of bubbles; If the segment has the above defects, repair it according to the following method: The pores on the outer surface of the pipe segment are modified, and the pores on the water stop with a diameter greater than 2 mm are modified by secondary filling; For non-penetrating cracks with a width of 0.1mm to 0.2mm, the fine cracks of the pipe segment are filled with cement mixed with rubber. All fillers should be tightly combined with the crack surface and combined well. When the first filling material shrinks, the second filling is carried out; For the repair of chipping and damage: 1) Clean up the residual concrete at the broken corners and damaged parts, and straighten the edge of the broken corners; clean the damaged surface on the pipe segment with a wire brush and rinse it with clean water; 2) Fill the mortar in layers and pieces, and finally use a spatula to level and smooth it. Each filling should not exceed 2 cm, and the next piece of filling should be pressed on the previous one.

10. The segment processing method according to claim 9, characterized in that: After the pipe segment is repaired, the pipe segment is transported to a pool by a transport vehicle for pool curing. After the pipe segment is removed from the mold and cooled to a temperature difference of no more than 20°C from the natural temperature, it is put into the pool for curing; the finished pipe segment is placed upright and placed in the pool at an angle of 90° to the pool floor for curing; the water level of the pool is more than 5 cm higher than the top of the pipe segment. After the pipe segment is cured in the pool for no less than 14 days, it is transported to a storage yard for natural curing for no less than 14 days.

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