A prefabricated box-type pipe segment forming template system and a construction method thereof

Abstract

This invention relates to the field of precast concrete component production technology, specifically to a precast box-type pipe segment forming template system and its construction method. The forming template system includes a bottom mold assembly, side mold assemblies, and an inner mold assembly. Through the cooperation of these assemblies and the rational arrangement of pouring holes, the overall forming of the pipe segment can be achieved without anti-buoyancy measures. Furthermore, the inner and outer molds are not intersecting, preventing the formation of weak leakage points on the pipe segment due to post-sealing holes. The hinged installation of the top corner template facilitates the pouring and vibration of the pipe segment's bottom slab, side walls, and bottom corner transition surfaces, ensuring thorough concrete vibration and improving construction efficiency and concrete forming quality. The use of a detachable bottom mold allows for full surface quality repair and anti-seepage and anti-corrosion treatment of the pipe segment, improving its overall service performance. This construction method employs a precast box-type pipe segment forming template system, allowing for targeted pouring and vibration of the bottom slab, bottom corners, and top corners of the pipe segment, thus improving the forming quality.

Description

Technical Field

[0001] This invention relates to the field of precast concrete component production technology, specifically to a precast box-type pipe section forming template system and its construction method. Background Technology

[0002] The three-column floating wind turbine foundation is one of the mainstream wind turbine foundation types. It mainly consists of three side columns arranged in an equilateral triangle and a floating box-type lower body connected between the three side columns. The lower body is a box-shaped pipe section structure with a cross-sectional shape similar to that of immersed tubes and floating boxes. Its cross-section is closed in a ring, and a partition wall is set inside to increase the structural strength.

[0003] The prefabrication of existing concrete box girder tunnel sections typically uses customized steel formwork. The process involves reinforcing steel reinforcement binding, formwork assembly and fixing, concrete pouring and vibration, curing, and formwork removal to complete the component formation. However, existing box girder tunnel section forming formwork systems generally face the following problems in use:

[0004] (1) Formwork floating problem: Due to the good fluidity of fresh concrete, during the layered pouring and compaction of the bottom plate of the pipe section, a continuous upward buoyancy will be generated on the bottom and side wall of the hollow inner formwork. The larger the cross-sectional size of the pipe section, the larger the volume of concrete poured, and the higher the vibration intensity, the more significant the upward buoyancy will be. This will cause the formwork system to be easily affected by the buoyancy of the concrete and float up, causing the pipe section size deviation to exceed the standard, resulting in multiple quality defects and reducing the service durability of the pipe section. (2) Problem of blind spots in concrete vibration: Due to the complex structure of the formwork system itself, there are many blind spots in the construction process, especially the area corresponding to the arc transition surface of the pipe section cannot be effectively vibrated, which affects the density of the concrete. (3) Insufficient adaptability of prefabrication methods: The bottom surface of the existing box-type pipe section structure does not need to be in direct contact with water, so the durability requirements of its bottom surface are relatively lower than those of other side walls. Based on this, the industry generally adopts the in-situ prefabrication method for construction.

[0005] If the existing prefabrication methods for box-type pipe sections are used for the prefabrication of floating body sections under floating foundations, a series of new problems will arise: Firstly, because the hydrodynamic coupling of floating foundations is more complex than that of immersed pipes and pontoons, larger arc-shaped transition surfaces need to be set at the corners of the floating body. The enlargement of these arc-shaped transition surfaces will directly lead to a significant reduction in the contact area between the bottom of the formwork system and the site during the prefabrication process compared to immersed pipes and pontoons, further increasing the risk of the formwork system floating. Anti-buoyancy measures are needed to ensure the stability of the formwork system. Existing anti-buoyancy measures mainly... The tie rod structure, which runs through both the inner and outer molds, has low installation and dismantling efficiency and leaves weak leakage points on the pipe sections due to post-sealing holes, failing to meet the integrity requirements of the outer wall of the floating body under the floating foundation. On the other hand, the arc-shaped transition surface template further reduces the space available for vibration, especially in the bottom slab pouring area, which is blocked by the arc-shaped transition surface template at the top of the structure, making it difficult to achieve sufficient vibration, thus affecting the structural strength and durability. In addition, the existing in-situ prefabrication method cannot achieve quality repair and effective seepage and corrosion prevention treatment of its bottom surface, failing to meet the requirement that the floating foundation must float entirely in the water. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies, such as using the existing prefabrication production method of box-type pipe segment structure for prefabrication of floating bodies under floating foundations, high risk of template floating, low efficiency of anti-buoyancy measures installation and dismantling and affecting the integrity of the outer wall of the pipe segment, insufficient concrete vibration, and inability to perform quality repair and anti-seepage and anti-corrosion treatment on the bottom surface of the pipe segment. The invention provides a prefabricated box-type pipe segment forming template system and its construction method.

[0007] In a first aspect, the present invention provides a prefabricated box-type pipe segment forming template system, comprising: The bottom formwork assembly includes several arrayed supports and several spliced ​​bottom templates. The supports are used to support the bottom templates, and the bottom templates can be removed after the pipe section is formed. The side formwork assembly includes an outer side wall formwork, a top corner formwork, and a first support. The outer side wall formwork is connected to the side of the first support, and the top corner formwork is hinged to the first support and located above the outer side wall formwork. Two first supports are symmetrically erected on the ground on both sides of the bottom formwork assembly. The two first supports are connected by a first tie rod and a second tie rod. The first tie rod passes through the bottom formwork, and the second tie rod is located above the pipe section, forming a top plate pouring hole between the oppositely arranged top corner formworks. The inner mold assembly includes an inner template and a second support, the second support being used to support the inner template and forming a casting chamber around the inner mold assembly; The inner formwork is provided with several bottom plate pouring holes, and the side wall formwork is provided with several side wall pouring holes. The top plate pouring holes, the bottom plate pouring holes, and the side wall pouring holes are respectively connected to the pouring chamber.

[0008] This invention discloses a precast box-type pipe segment forming template system. Through the cooperation of a bottom mold assembly, side mold assemblies, and an inner mold assembly, and the rational arrangement of pouring holes, the system achieves integral forming of the pipe segment. By passing a first tie rod through the bottom mold assembly, which includes supports, the overall integrity of the template system is improved, increasing its overall weight. No anti-buoyancy measures are needed when pouring the bottom slab of the pipe segment. Furthermore, based on the weight of the bottom mold assembly and the formed bottom slab, no anti-buoyancy measures are required during subsequent pouring processes, simplifying the template system structure and reducing the time spent installing and removing additional anti-buoyancy measures. The first tie rod and second tie rod connect the first bracket of the side mold assembly to achieve connection and fixation of the two side molds. The inner mold assembly and outer mold assembly are not through-pull tensioned, which is significant compared to existing systems. The structure features an inner and outer template tie-connection, preventing the formation of weak leakage points due to post-sealing holes in the pipe section. The use of hinged corner templates to form the top corner transition surface of the pipe section allows the corner templates to unfold during the pouring of the structure below, maintaining an open formwork state without obstructing the pouring of the structure below. This facilitates the pouring and vibration of the pipe section's bottom slab, side walls, and bottom corner transition surface, ensuring thorough concrete vibration and improving construction efficiency and concrete quality. Furthermore, the use of detachable bottom templates allows for removal after pipe section formation, enabling quality repair and anti-seepage / anti-corrosion treatment of the bottom surface. This achieves full-surface quality repair and anti-seepage / anti-corrosion treatment of the pipe section, improving its overall service performance.

[0009] Preferably, the support pier is provided with a first support seat and a second support seat that can adjust the elevation of the bottom template. The bottom template includes a beam template, a patch template, and a bottom corner template. The beam template and the patch template are alternately arranged along the longitudinal direction of the pipe section. The first support seat on at least two adjacent supports in the lateral direction supports the beam template, and the second support seat on two adjacent supports in the longitudinal direction supports the patch template. The top surface of the beam template and the patch template is detachably connected to the bottom corner template, which is used to form the bottom corner transition surface of the pipe section.

[0010] By adopting the bottom formwork assembly of this structure, the beam-shaped template and the patch template can be removed separately through the cooperation of the first support base and the second support base, so as to carry out the quality repair and anti-seepage and anti-corrosion treatment of the outer surface of the pipe section in the corresponding area. The bottom corner transition surface of the pipe section can be formed by the detachable bottom corner template, which can improve the forming quality. The bottom corner template can be replaced according to the shape and size of the bottom corner transition surface of the pipe section, forming pipe sections with different cross-sectional shapes.

[0011] Preferably, an opening and closing adjustment mechanism is provided between the top corner template and the first support, and the oppositely arranged top corner templates are connected by a third tie rod above the pipe section. The top corner template is provided with a plurality of top corner pouring holes and top corner vibration holes.

[0012] By adopting the side formwork assembly of this structure, the opening and closing of the top corner formwork can be adjusted through the opening and closing adjustment mechanism, the locking of the top corner formwork after closing can be achieved through the third tie rod, and the construction conditions for full pouring and vibration of the top plate and top corner area of ​​the pipe section can be provided through the top corner pouring hole and the top corner vibration hole.

[0013] Preferably, the first support includes a three-dimensional truss, the first support is connected and fixed by a site-embedded structure, and the bottom of the first support is provided with adjustable feet, which are used to adjust the elevation of the first support.

[0014] By adopting the side formwork assembly with this structure, the three-dimensional truss can provide stable support for the side wall formwork. The side formwork assembly is connected above and below the pipe section by the first tie rod and the second tie rod, so that the side formwork assembly can be stably set without having to be connected through to the inner formwork assembly. This further improves the overall anti-buoyancy effect of the formwork system, and the height can be adjusted to match the pipe section according to the actual situation, improving installation efficiency and achieving high-quality and efficient overall forming of the pipe section.

[0015] Preferably, the second support includes a main truss and an adjustable strut assembly. The inner formwork is slidably engaged with the main truss. The adjustable strut assembly can move the inner formwork closer to or away from the main truss. The main truss is connected to telescopic legs. The telescopic legs can abut against the cast-in-place base slab of the pipe section or abut against the support pier through the steel reinforcement cage of the base slab.

[0016] The inner formwork assembly using this structure can provide stable support for the inner formwork during the pouring process through the main truss equipped with telescopic legs, and the opening and closing of the inner formwork can be adjusted by adjusting the strut assembly.

[0017] Preferably, the inner template includes a top slab inner template, a first wall inner template, and a second wall inner template. The bottom of the first wall inner template is hinged to a first bottom corner template, and the bottom of the second wall inner template is hinged to a second bottom corner template. The bottom slab pouring hole is formed between the first bottom corner template and the second bottom corner template. The first bottom corner template and the second bottom corner template are provided with a plurality of bottom corner vibration holes.

[0018] By adopting this internal template structure, multiple templates can be independently moved and adjusted by adjusting the support rod assembly, realizing the opening and closing adjustment of the internal template. At the same time, the inner bottom corner of the pipe section is formed by the first bottom corner template and the second bottom corner template, and the bottom plate is fully filled by the bottom plate pouring hole. The bottom plate and bottom corner area of ​​the pipe section can be fully vibrated by vibrating from the bottom plate pouring hole and the bottom corner vibration hole.

[0019] Preferably, the template system further includes a track mechanism, which supports the inner mold assembly to move longitudinally along the pipe section. The track mechanism abuts against the top surface of the already poured bottom slab of the pipe section, or passes through the bottom slab reinforcement cage and abuts against the support.

[0020] Preferably, the template system further includes a rebar tying frame, which is used to assist in tying the rebar in the pipe section, and the track mechanism is capable of supporting the rebar tying frame to move longitudinally along the pipe section.

[0021] In a second aspect, the present invention provides a construction method for precast box-type pipe segment forming templates, employing a precast box-type pipe segment forming template system as described above, and comprising the following steps: S1. Set up the support piers on the site, install the bottom formwork on the support piers, and tie the bottom slab reinforcement and part of the side wall reinforcement of the first pouring section of the pipe section on the bottom formwork. S2. Install the track mechanism, install the rebar binding frame on the track mechanism, and bind the rebar of the pipe section top plate and the remaining side wall. S3. Install the inner mold assembly and the side mold assembly. The inner mold is supported and fixed by the second bracket. The first bracket is connected by the first tie rod and the second tie rod and is connected to the site pre-embedded structure. The inner mold assembly and the side mold assembly are not connected. S4. Keep the top corner template in the unfolded state, pour the bottom plate and bottom corner wall of the concrete forming pipe section, and pour the side wall of the concrete forming pipe section after vibration. S5. Close and lock the top corner template, pour concrete to form the top corner wall and top slab of the pipe section, and vibrate it. S6. After the concrete curing is completed, remove the side formwork assembly, inner formwork assembly and bottom formwork assembly, and carry out the outer surface construction treatment of the pipe section. Alternatively, after the first pouring section is formed, move the inner formwork assembly and the side formwork assembly along the longitudinal direction of the pipe section, pour the concrete to form the second pouring section of the pipe section, and then carry out the outer surface construction treatment of the pipe section.

[0022] This invention discloses a construction method for a precast box-type pipe segment forming template system. By employing the aforementioned precast box-type pipe segment forming template system, the system enables the integral forming of the entire cross-section of the pipe segment through the cooperation of bottom formwork components, side formwork components, and inner formwork components. Targeted pouring and vibration are applied to the bottom slab, bottom corners, and top corners of the pipe segment, improving the forming quality of these areas. The cooperation of the bottom formwork components and side formwork components, including supports, increases the overall weight of the template system. No anti-buoyancy measures are needed when pouring the bottom slab of the pipe segment. Furthermore, based on the weight of the bottom formwork components and the formed bottom slab, no anti-buoyancy measures are required during subsequent pouring processes. This simplifies the template system structure, improves construction efficiency, overcomes the problem of template system floating, and prevents the creation of weak seepage points in the pipe segment due to post-sealing holes. The use of a detachable bottom formwork allows for full-surface quality repair and anti-seepage and anti-corrosion treatment of the pipe segment after forming by removing the bottom formwork, improving the overall service performance of the pipe segment.

[0023] Preferably, the pipe section includes several compartments, and the inner mold components are synchronously installed in adjacent compartments to form partition walls. S4 specifically includes: S4.1. Use a pipe to insert the material into the partition wall area from the top plate pouring hole, and fill it to the bottom chamfer position of the partition wall; S4.2. Use a chute to symmetrically pour water from the side wall pouring hole into the pouring chamber until the bottom corner of the side wall is filled. S4.3. A chute is used to extend into the compartment from both ends of the pipe section longitudinally and pour into the bottom plate pouring hole until the bottom plate and bottom corner wall are poured. S4.4. Several vibration positions are arranged along the transverse and longitudinal directions of the pipe section for vibration. After completion, the side wall pouring holes are sealed.

[0024] By adopting the above-mentioned base slab pouring process, the pouring and vibration quality of difficult construction locations such as the bottom chamfer of the partition wall and the bottom corner of the pipe section can be improved in a targeted manner during the pouring process, thereby improving the overall forming quality of the pipe section.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a precast box-type pipe segment forming template system, which, through the cooperation of bottom mold assembly, side mold assembly and inner mold assembly, and the reasonable arrangement of pouring holes, can realize the overall forming of the pipe segment; 2. The present invention provides a precast box-type pipe segment forming template system. By passing the first tie rod through the bottom formwork assembly including the support, the integrity of the template system is improved and the overall weight of the template system is increased. No anti-buoyancy measures are required when pouring the bottom plate of the pipe segment. Then, based on the weight of the bottom formwork assembly and the formed bottom plate, no anti-buoyancy measures are required in the subsequent pouring process. This simplifies the template system structure and reduces the time required to install and remove additional anti-buoyancy measures. 3. The present invention provides a prefabricated box-type pipe section forming template system, wherein the first support of the side mold assembly is connected by the first tie rod, and the inner mold assembly and the outer mold assembly are not connected through the tie rod. Compared with the existing inner and outer template tie connection structure, the post-sealing hole will not form a weak leakage point on the pipe section. 4. This invention provides a precast box-type pipe segment forming template system. By using a hinged top corner template to form the top corner transition surface of the pipe segment, the top corner template can be unfolded during the casting and forming process of the structure below, maintaining the open formwork state. This will not obstruct the casting of the structure below the top corner template, facilitating the casting and forming and vibration of the bottom plate, side walls and bottom corner transition surface of the pipe segment, ensuring sufficient concrete vibration, improving construction efficiency and concrete forming quality. 5. This invention provides a precast box-type pipe section forming template system. By using a detachable bottom template, the bottom template can be removed after the pipe section is formed, and the bottom surface of the pipe section can be repaired and treated for seepage prevention and corrosion prevention. This achieves full-surface quality repair and seepage prevention and corrosion prevention treatment of the pipe section, thereby improving the overall service performance of the pipe section. 5. This invention provides a precast box-type pipe segment forming template system. By using a hinged top corner template, the top corner template can be unfolded during the pouring and forming process of the structure below, without obstructing the pouring process below the top corner template. This facilitates the pouring and forming of the pipe segment bottom plate and side walls, ensuring sufficient concrete vibration, improving construction efficiency and concrete forming quality. 6. This invention provides a construction method for a precast box-type pipe segment forming template system. By adopting the precast box-type pipe segment forming template system described above, the entire cross-section of the pipe segment can be integrally formed through the cooperation of the bottom mold assembly, side mold assembly, and inner mold assembly. Targeted pouring and vibration can be applied to the bottom plate, bottom corners, and top corners of the pipe segment, improving the forming quality of the corresponding areas. This simplifies the template system structure, increases construction efficiency, overcomes the problem of template system floating, and avoids leaving post-sealing holes on the pipe segment that would form weak seepage points. Furthermore, it enables full-surface quality repair and seepage prevention and corrosion protection treatment of the pipe segment, improving the overall service performance of the pipe segment. Attached Figure Description

[0026] Figure 1 This is a top view of the bottom mold assembly described in Example 1.

[0027] Figure 2 for Figure 1 Schematic diagram of the AA section structure.

[0028] Figure 3 This is a schematic diagram of the disassembled state of the bottom mold component described in Example 1.

[0029] Figure 4 for Figure 1 Schematic diagram of the BB section structure.

[0030] Figure 5 This is a side view of the bottom mold assembly described in Example 1.

[0031] Figure 6 This is a side view of the rebar tying frame in use as described in Example 1.

[0032] Figure 7 This is a front view of the rebar tying frame in use as described in Example 1.

[0033] Figure 8 This is a side view of the inner mold assembly described in Example 1.

[0034] Figure 9 This is a schematic diagram of the telescopic support leg position structure in the usage state of the inner mold assembly described in Example 1.

[0035] Figure 10 This is a schematic diagram of the mold-closed state structure of the inner mold component in use as described in Example 1.

[0036] Figure 11 This is a schematic diagram showing the arrangement of the adjusting strut assembly of the inner mold assembly described in Example 1.

[0037] Figure 12 This is a schematic diagram of the side mold assembly described in Example 1.

[0038] Figure 13 This is a schematic diagram of the mold-closed state structure of a prefabricated box-type pipe segment forming template system according to Example 1.

[0039] Figure 14 This is a schematic diagram of the mold opening state of a prefabricated box-type pipe segment forming template system according to Example 1.

[0040] Figure 15 This is a front view of the formwork system corresponding to the construction method described in S4.2 of Example 2.

[0041] Figure 16 This is a side view of the formwork system corresponding to the construction method described in S4.2 of Example 2.

[0042] Marked in the image: 100-Bottom formwork assembly, 101-Support, 102-Bottom formwork, 1021-Beam-shaped formwork, 1022-Patch formwork, 1023-Bottom corner formwork, 103-First support seat, 104-Second support seat; 200-Side formwork assembly, 201-External side wall formwork, 202-Top corner formwork, 203-First support, 204-First tie rod, 205-Second tie rod, 206-Third tie rod, 207-Opening and closing adjustment mechanism, 208-Adjusting support leg, 209-Side wall pouring hole; 300-Inner formwork assembly, 301-Inner template, 3011-Top slab inner template, 3012-First wall inner template, 3013-Second wall inner template, 3014-First bottom corner template, 3015-Second bottom corner template, 302-Main truss, 303-Adjustable strut assembly, 304-Telescopic support leg; 400 - Casting chamber, 401 - Top slab casting hole, 402 - Bottom slab casting hole; 500 - Site-embedded structure; 600-Railway Mechanism; 700 - Rebar Binding Frame; 01-Pipe section, 011-Top corner transition surface, 012-Bottom corner transition surface, 013-Compartment, 014-Partition wall, 015-Side wall. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0044] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0045] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0046] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0047] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0048] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0049] Example 1 like Figures 1-14As shown, a precast box-type pipe segment forming template system of this embodiment includes a bottom mold assembly 100, a side mold assembly 200, an inner mold assembly 300, a track mechanism 600, and a rebar binding frame 700. The bottom mold assembly 100, the side mold assembly 200, and the inner mold assembly 300 are combined to form a casting chamber 400 for precasting concrete pipe segment 01 of the floating body under the floating foundation.

[0050] like Figure 9 As shown, pipe section 01 has arc-shaped top corner transition surfaces 011 on both sides of the top of the cross-section, and bottom corner transition surfaces 012 on both sides of the bottom of the cross-section. The inner side is provided with a compartment, forming an integral box-shaped pipe section 01 structure with a closed annular cross-section.

[0051] In some alternative embodiments, partition walls 014 may be provided on the cross-section of pipe segment 01 to form multiple compartments 013.

[0052] In this embodiment, as Figure 9 As shown, a partition wall 014 is set in the middle of the cross-section of pipe section 01 to form two symmetrically arranged compartments 013.

[0053] like Figures 1-5 As shown, the bottom formwork assembly 100 includes a plurality of supports 101 arranged in an array and a plurality of bottom formwork 102 spliced ​​together. The supports 101 are used to support the bottom formwork 102. The bottom formwork 102 includes beam-shaped formwork 1021, interlocking formwork 1022 and bottom corner formwork 1023.

[0054] In some optional embodiments, the support 101 is provided with a first support seat 103 and a second support seat 104 that can adjust the elevation of the bottom template 102. With the width direction of the pipe segment 01 as the transverse direction and the through direction of the pipe segment 01 as the longitudinal direction, the beam template 1021 and the patch template 1022 are alternately arranged along the longitudinal direction of the pipe segment 01. The first support seat 103 on at least two transversely adjacent supports 101 supports the beam template 1021, and the second support seat 104 on two longitudinally adjacent supports 101 supports the patch template 1022. The top surfaces of the beam template 1021 and the patch template 1022 are detachably connected to the bottom corner template 1023, which is used to form the bottom corner transition surface 012 of the pipe segment 01.

[0055] In this embodiment, on the projection surface of the pipe cross-section, such as Figure 1 As shown, three rows of supports 101 are arranged longitudinally along pipe segment 01, respectively supporting the partition wall 014 and the two side walls 015 of pipe segment 01. Beam-shaped formwork 1021 is adapted to the transverse width of pipe segment 01 and supported above the three supports 101. Figure 1 , Figure 2 As shown, two insert templates 1022 are arranged side by side and supported below the two compartments 013 of the pipe section 01.

[0056] When using the bottom formwork assembly 100 with this structure, the patch template 1022 can be spliced ​​or separated from the beam template 1021 by adjusting the support height of the second support seat 104. After the elevation of the patch template 1022 is lowered, it can be removed from the adjacent support 101 along the transverse direction of the pipe section 01, so that the beam template 1021 can always provide stable support for the pipe section 01. The patch template 1022 can be removed according to the needs of bottom repair and anti-seepage and anti-corrosion treatment of the pipe section 01.

[0057] In some alternative embodiments, the beam-shaped template 1021 can be removed by the support and cooperation of other beam-shaped templates 1021 and the insert template 1022.

[0058] In some alternative implementations, the first support 103 and the second support can be passive supports to achieve stable support for the template system and the overall structure of pipe segment 01.

[0059] In some optional embodiments, the first support 103 may also be provided with a transverse anti-slip surface to increase the transverse anti-slip effect of the first support 103. When the pipe segment 01 has a transverse displacement tendency due to prestress tension, the prestress tension can be transferred from the contact surface between the pipe segment 01 and the bottom template 102 to the transverse anti-slip surface, thereby increasing the resistance to prestress tension and achieving a better forming effect of the pipe segment 01.

[0060] In some alternative embodiments, both the beam-shaped formwork 1021 and the patch formwork 1022 are steel formwork.

[0061] In this embodiment, the beam-shaped template 1021 and the patch template 1022 can be composed of steel templates and customized steel support beams / plates, and the bottom corner template 1023 can be composed of arc-shaped steel plates and customized steel support blocks.

[0062] In some optional embodiments, a lifting support is provided at the top of the beam-shaped template 1021 or the patch template 1022 corresponding to the bottom corner template 1023 below. The lifting support is used to support the bottom corner template 1023 and can adjust the fit between the bottom corner template 1023 and the bottom corner transition surface 012 of the pipe section 01.

[0063] In this embodiment, the first support 103 adopts a support structure that achieves lifting function by adjusting the movement of wedge blocks, and the second support 104 adopts a support structure that achieves lifting function by adjusting the rotation of screws. A support structure that achieves lifting function by adjusting the rotation of screws is set on the top of the beam template 1021 to support the bottom corner template 1023, and a steel component is set on the top of the interlocking template 1022 to support the bottom corner template 1023.

[0064] In this embodiment, the support 101 is a concrete pier-shaped component.

[0065] In some alternative implementations, embedded components can be provided on the support 101, and the bottom formwork 102 and the embedded components can be detachably connected by connectors, so that the support 101 plays a counterweight and anti-buoyancy role on the bottom formwork 102, and the overall weight of the bottom formwork assembly 100 can be further increased by the support 101, thereby further improving the anti-buoyancy effect of the formwork system.

[0066] In this embodiment, the connecting member can be a threaded connecting rod, with the top end of the threaded connecting rod being threadedly fixed to the bottom template 102 and the bottom end being threadedly fixed to the embedded component.

[0067] In this embodiment, the beam-shaped template 1021 is connected to the embedded component below by a connector, and several connectors are distributed in the circumferential direction of the first support 103.

[0068] By adopting the bottom mold assembly 100 with this structure, the beam-shaped template 1021 and the patch template 1022 can be removed separately through the cooperation of the first support 103 and the second support 104, so as to carry out the quality repair and anti-seepage and anti-corrosion treatment of the outer surface of the pipe section 01 in the corresponding area; the bottom corner transition surface 012 of the pipe section 01 can be formed by the detachably connected bottom corner template 1023, which can improve the forming quality, and the bottom corner template 1023 can be replaced according to the shape and size of the bottom corner transition surface 012 of the pipe section 01 to form pipe sections 01 with different cross-sectional shapes.

[0069] like Figure 12 As shown, the side formwork assembly 200 includes a side wall outer formwork 201, a top corner formwork 202, and a first support 203. The side wall outer formwork 201 is connected to the side of the first support 203. The top corner formwork 202 is hinged to the first support 203 and located above the side wall outer formwork 201. Two first supports 203 are symmetrically erected on the ground on both sides of the bottom formwork assembly 100. The two first supports 203 are connected by a first tie rod 204 and a second tie rod 205. The first tie rod 204 passes through the bottom formwork 102, and the second tie rod 205 is located above the pipe section 01, forming a top plate pouring hole 401 between the oppositely arranged top corner formworks 202.

[0070] In this embodiment, the side wall outer formwork 201 can be a large steel formwork, and the top corner formwork 202 can be a custom-shaped large steel formwork, which can be adapted to the prefabricated length of the pipe section 01 through longitudinal splicing.

[0071] In this embodiment, a number of side wall casting holes 209 are arranged longitudinally on the side wall 015 template. The side wall casting holes 209 on the side wall 015 templates on both sides are arranged opposite to each other, so that the symmetrical casting of the pipe section 01 can be achieved through the side wall casting holes 209 on both sides.

[0072] In this embodiment, as Figure 12 As shown, two first supports 203 are symmetrically arranged, and two side wall outer templates 201 are arranged opposite each other on the side of the first supports 203 near the pipe section 01. The bottom of the two side wall outer templates 201 can be spliced ​​with the bottom corner template 1023, and the two top corner templates 202 can be rotated to splice with the top of the side wall outer template 201.

[0073] In this embodiment, as Figure 13 , Figure 14 As shown, the insert template 1022 is provided with a horizontally penetrating tie rod hole for fitting the first tie rod 204. Several tie rod holes are arranged at intervals so that the first support 203 can be connected below the pipe section 01 by the first tie rod 204 passing through the bottom template 102, and the side formwork assembly 200 and the bottom formwork assembly 100 can be connected. The side formwork assembly 200 can increase the weight of the bottom formwork assembly 100, and play a joint anti-buoyancy role during the concrete pouring process.

[0074] In some alternative implementations, such as Figure 12 As shown, an opening and closing adjustment mechanism 207 is provided between the top corner template 202 and the first support 203. The oppositely arranged top corner templates 202 are connected by a third tie rod 206 above the pipe section 01. The top corner template 202 is provided with several top corner pouring holes and top corner vibration holes. The opening and closing adjustment mechanism 207 can realize the opening and closing adjustment of the top corner template 202, and the third tie rod 206 can realize the locking of the top corner template 202 after closing. The top corner pouring holes and top corner vibration holes provide construction conditions for the full pouring and vibration of the top plate and top corner area of ​​the pipe section 01.

[0075] In this embodiment, as Figure 12 As shown, the opening and closing adjustment mechanism 207 can be a combination of a hydraulic cylinder and an adjusting screw. The hydraulic cylinder provides power to drive the top corner template 202 to rotate and open / close the mold. The adjusting screw provides stable support after the top corner template 202 is adjusted to the correct position. In the open state of the top corner template 202, concrete can be poured and vibrated in the corresponding areas of the side wall 015, partition wall 014 and bottom plate through the top plate pouring hole 401 formed between the two top corner templates 202. In the closed state of the top corner template 202, the top corner pouring hole and the top corner vibration hole can be used to perform targeted pouring and vibration in the top corner area of ​​the pipe section 01.

[0076] In some alternative implementations, the corner pouring holes and corner vibratory holes can be distributed according to the pouring and vibration requirements.

[0077] In some alternative implementations, the first support 203 can be a three-dimensional truss. The first support 203 is connected and fixed by a site-embedded structure 500. An adjustable support leg 208 is provided at the bottom of the first support 203. The adjustable support leg 208 is used to adjust the elevation of the first support 203.

[0078] In this embodiment, the first support 203 can be formed by splicing multiple three-dimensional trusses along the longitudinal direction of pipe segment 01. The side formwork assembly 200 can be assembled on site and then hoisted into place by a lifting device. The side formwork assembly 200 can move along the longitudinal direction of pipe segment 01 by a traveling mechanism connected to the top of the first support 203, or it can move along the longitudinal direction of pipe segment 01 by a lifting device. In this embodiment, a lifting device is used to move the side formwork assembly 200 along the longitudinal direction of pipe segment 01.

[0079] In this embodiment, when the side mold assembly 200 is in the closed state, the upper part of the pipe segment 01 is connected to the three-dimensional truss through the second tie rod 205, the lower part of the pipe segment 01 is connected to the three-dimensional truss through the first tie rod 204 passing through the bottom template 102, and the top of the pipe segment 01 is connected to the top corner template 202 through the third tie rod 206. This enables the side mold assembly 200 to be stably set without penetrating the side wall of the pipe segment 01, thereby improving the integrity of the template system and enhancing the overall anti-buoyancy effect of the template system.

[0080] In this embodiment, as Figures 12-14 As shown, the site pre-embedded structure 500 can be several anti-buoyancy tie rods arranged at intervals along the longitudinal direction.

[0081] In this embodiment, the adjustable support 208 can be a threaded height adjustment structure.

[0082] By adopting the side formwork assembly 200 of this structure, the three-dimensional truss can provide stable support for the side wall 015 formwork, enabling the side formwork assembly 200 to be stably set up without needing to be connected through to the inner formwork assembly 300. It can also improve the overall anti-buoyancy effect of the formwork system, and can adjust the formwork height to match the pipe section 01 according to the actual situation, thereby improving installation efficiency and achieving high-quality and efficient forming of the pipe section 01. At the same time, by replacing the top corner formwork 202 with different shapes, pipe sections 01 with different cross-sectional shapes can be formed.

[0083] like Figures 8-11 As shown, the inner mold assembly 300 includes an inner mold 301 and a second support, the second support being used to support the inner mold 301.

[0084] In some alternative embodiments, the second support includes a main truss 302 and an adjustable strut assembly 303. The inner formwork 301 is slidably engaged with the main truss 302. The adjustable strut assembly 303 can move the inner formwork 301 closer to or away from the main truss 302. The main truss 302 is connected to telescopic legs 304, which can abut against the already poured bottom slab of pipe section 01 or pass through the bottom slab reinforcement cage to abut against the support pier 101. The inner formwork assembly 300 with this structure can provide stable support for the inner formwork 301 during the pouring process through the main truss 302 equipped with telescopic legs 304, and the opening and closing adjustment of the inner formwork 301 can be achieved by adjusting the strut assembly 303.

[0085] In this embodiment, the main truss 302 is a three-dimensional steel truss structure. The length of the main truss 302 is adapted to the length of a cast section of the pipe segment 01. Telescopic legs 304 are set at both ends of the longitudinal direction of the main truss 302. During the casting process, the telescopic legs 304 abut against the cast-in-place bottom plate of the pipe segment 01 or abut against the top of the support pier 101 through the steel cage of the bottom plate. The adjusting strut assembly 303 applies abutment force between the main truss 302 and the inner formwork 301, pushing the inner formwork 301 to fit against the wall of the steel cage cavity of the pipe segment 01. After the pipe segment 01 is cured, the adjusting strut assembly 303 drives the inner formwork 301 to move toward the main truss 302 to achieve demolding.

[0086] In this embodiment, the main truss 302 can be formed by splicing multiple steel truss structures along the longitudinal direction of pipe segment 01. The inner mold assembly 300 can be assembled on the track mechanism 600 near the pouring position and then moved into place along the track mechanism 600.

[0087] In some optional embodiments, the inner template 301 includes a top plate inner template 3011, a first wall inner template 3012, and a second wall inner template 3013. The bottom of the first wall inner template 3012 is hinged to a first bottom corner template 3014, and the bottom of the second wall inner template 3013 is hinged to a second bottom corner template 3015. The top plate inner template 3011, the first wall inner template 3012, the second wall inner template 3013, the first bottom corner template 3014, and the second bottom corner template 3015 are moved or rotated by adjusting the support rod assembly 303, forming a bottom plate pouring hole 402 between the first bottom corner template 3014 and the second bottom corner template 3015.

[0088] In this embodiment, the top slab inner template 3011, the first wall inner template 3012, and the second wall inner template 3013 are laterally slidingly engaged with the main truss 302 through guide grooves and guide rods. The top slab inner template 3011 is slidably disposed on the top of the main truss 302, and the first wall inner template 3012 and the second wall inner template 3013 are disposed opposite to each other on both sides of the main truss 302.

[0089] In some alternative embodiments, the adjusting strut assembly 303 can be a combination of a hydraulic cylinder and an adjusting screw, and the contact position and number of the hydraulic cylinder and the adjusting screw can be adjusted according to the actual situation.

[0090] In this embodiment, the top slab inner template 3011 is adjusted in the lateral direction relative to the main truss 302 by a hydraulic cylinder. The first wall inner template 3012 and the second wall inner template 3013 are adjusted and fixed in the lateral direction relative to the main truss 302 by two hydraulic cylinders and two adjusting screws, respectively. The relative position relative to the main truss 302 is fixed by multiple adjusting screws in the oblique direction. The relative position of the first wall inner template 3012 and the second wall inner template 3013 is fixed by adjusting screws connecting them. The first bottom corner template 3014 and the second bottom corner template 3015 are abutted on both sides of the bottom slab pouring hole 402 by several adjusting screws to ensure the structural stability of each template unit of the inner template 301.

[0091] In this embodiment, the first bottom corner template 3014 and the second bottom corner template 3015 can be rotated relative to each other by a hydraulic cylinder, hoist or other lifting mechanism to change the range of the bottom plate pouring hole 402.

[0092] In this embodiment, the first bottom corner template 3014 and the second bottom corner template 3015 are provided with a number of bottom corner vibration holes, which are similar in structure and function to the top corner vibration holes, and can effectively vibrate the bottom corner area of ​​the pipe section 01.

[0093] By adopting the inner template 301 with this structure, multiple templates can be independently moved and adjusted by adjusting the support rod assembly 303, realizing the opening and closing adjustment of the inner template 301. At the same time, the inner bottom corner of the pipe section 01 is formed by the first bottom corner template 3014 and the second bottom corner template 3015, and the bottom plate is fully filled by the bottom plate pouring hole 402. By vibrating from the bottom plate pouring hole 402 and the bottom corner vibration hole, the bottom plate and bottom corner area of ​​the pipe section 01 can be fully vibrated, improving the pouring quality of the bottom plate and bottom corner area of ​​the pipe section 01.

[0094] In some alternative embodiments, the bottom of the main truss 302 can be equipped with a pulley mechanism, and a rail mechanism 600 can be arranged longitudinally along the pipe section 01 below the pulley mechanism, so that after the telescopic support leg 304 retracts, the pulley mechanism can be supported on the rail mechanism 600, and the rail mechanism 600 can support the inner mold assembly 300 to move longitudinally along the pipe section 01, thereby changing the pouring position of the inner mold assembly 300 in the pipe section 01.

[0095] In this embodiment, the track mechanism 600 is longitudinally arranged along the pipe segment 01 to provide stable support for the movement of the inner mold component 300 for the segmented prefabrication of the pipe segment 01.

[0096] In this embodiment, the track mechanism 600 can be a combination of a steel portal frame support and an upper steel rail. The legs of the steel portal frame support can abut against the top surface of the cast-in-place base plate of the pipe section 01, or pass through the steel reinforcement cage of the base plate and abut against the support pier 101 to achieve a stable support effect. The legs of the steel portal frame support are removed after the inner formwork assembly 300 is installed to facilitate concrete pouring.

[0097] like Figures 6-7 As shown, the rebar tying frame 700 can be composed of a truss-type work platform and a panel. The bottom of the truss-type work platform is equipped with wheels and jacks. The panel can include multiple adjustable opening and closing structures, allowing the rebar tying frame 700 to slide with the track mechanism 600 through the wheels, to adjust its height and switch its support through the jacks, and to support its use through opening and closing. It assists in the tying of rebar in pipe section 01, and allows the rebar tying frame 700 and the inner formwork assembly 300 to share the track mechanism 600 for movement.

[0098] In this embodiment, steel scaffolding can be installed on the truss-type work platform to assist workers in standing and operating.

[0099] This embodiment of a precast box-type pipe segment forming template system, through the cooperation of the bottom mold assembly 100, the side mold assembly 200, and the inner mold assembly 300, and the reasonable arrangement of pouring holes, can achieve the overall forming of pipe segment 01; by passing the first tie rod 204 through the bottom mold assembly 100 including the support 101, the integrity of the template system is improved, and the overall weight of the template system is increased. No anti-buoyancy measures are needed when pouring the bottom slab of pipe segment 01. Furthermore, based on the weight of the bottom mold assembly 100 and the formed bottom slab, no anti-buoyancy measures are needed in subsequent pouring processes, simplifying the template system structure and reducing the time required to install and remove additional anti-buoyancy measures; the first support 203 of the side mold assembly 200 is connected and fixed by the first tie rod 204 and the second tie rod 205, achieving connection and fixation of the two side molds. The inner mold assembly 300 and the outer mold assembly are not through-pull tensioned, relative to... The existing internal and external template tie-connection structure will not create weak leakage points in the pipe section 01 due to the post-sealing hole. By using the hinged top corner template 202 to form the top corner transition surface 011 of the pipe section 01, the top corner template 202 can be unfolded during the pouring and forming of the structure below, maintaining the open formwork state without obstructing the pouring of the structure below the top corner template 202. This facilitates the pouring and forming and vibration of the bottom plate, side wall 015 and bottom corner transition surface 012 of the pipe section 01, ensuring sufficient concrete vibration and improving construction efficiency and concrete forming quality. At the same time, by using the detachable bottom template 102, the bottom template 102 can be removed after the pipe section 01 is formed, allowing for quality repair and anti-seepage and anti-corrosion treatment of the bottom surface of the pipe section 01. This achieves full-surface quality repair and anti-seepage and anti-corrosion treatment of the pipe section 01, improving the overall service performance of the pipe section 01.

[0100] Example 2 A method for constructing a precast box-type pipe segment 01 using a formwork, wherein the pipe segment 01 includes several compartments 013, and adjacent compartments 013 are simultaneously equipped with inner mold components 300 to form partition walls 014. This embodiment illustrates the method by taking the formation of two compartments 013 through one partition wall 014 in the pipe segment 01 as an example, and adopts a precast box-type pipe segment forming formwork system of Embodiment 1, and includes the following steps: S1. Set up support 101 on the site, install bottom formwork 102 on support 101, and tie bottom slab reinforcement and some side wall reinforcement 015 of pipe section 01 on bottom formwork 102.

[0101] like Figures 1-6 As shown, a first support seat 103 and a second support seat 104 are installed on the support 101. A beam-shaped template 1021 is installed on the first support seat 103, and a patch template 1022 is installed on the second support seat 104. The beam-shaped template 1021 and the patch template 1022 are staggered along the longitudinal direction of the pipe segment 01. A bottom corner template 1023 is connected to the beam-shaped template 1021 and the patch template 1022 to form a bottom formwork assembly 100 with a forming surface that matches the shape of the pipe segment 01. The bottom plate reinforcement and part of the side wall 015 reinforcement are tied on the bottom formwork assembly 100.

[0102] S2. Install the track mechanism 600, and install the rebar binding frame 700 on the track mechanism 600 to bind the rebar of the top plate of pipe section 01 and the remaining side wall 015.

[0103] like Figure 8 , Figure 11 - As shown in Figure 12, the two compartments 013 are respectively equipped with track mechanisms 600.

[0104] S3. Install the inner mold assembly 300 and the side mold assembly 200. The inner mold 301 is supported and fixed by the second bracket. The first bracket 203 is connected by the first tie rod 204 and the second tie rod 205 and is connected to the site pre-embedded structure 500. The inner mold assembly 300 and the side mold assembly 200 are not connected.

[0105] Inner mold assembly 300 is installed in each of the two compartments 013, and side mold assembly 200 is fixed relative to the outside of pipe section 01.

[0106] S4. Keep the top corner template 202 in the unfolded state, pour the bottom plate and bottom corner wall of the concrete forming pipe section 01, and after vibration, pour the side wall 015 of the concrete forming pipe section 01.

[0107] In some alternative implementations, such as Figure 15 , Figure 16 As shown, S4 specifically includes: S4.1. Use a pipe to extend from the top corner pouring hole into the area of ​​partition wall 014 to pour material until the bottom chamfer of partition wall 014 is filled, thereby improving the pouring quality of the bottom chamfer of partition wall 014. S4.2. Use a chute to pour concrete symmetrically from the side wall pouring hole 209 to the pouring chamber 400, filling the bottom corner of the side wall 015, so that the bottom corner of the side wall 015 is filled with sufficient concrete, thereby improving the pouring quality. S4.3. A chute is used to extend from both ends of pipe section 01 longitudinally into compartment 013 and pour concrete into bottom slab pouring hole 402 until the bottom slab and bottom corner wall are poured, thus achieving bottom slab concrete filling and allowing the concrete to fully fill the bottom slab and part of the side wall 015 under free flow. S4.4. Several vibration positions are arranged horizontally and vertically along pipe section 01 for vibration. After completion, the side wall pouring hole 209 is sealed.

[0108] In this embodiment, the spacing of the pouring holes 015 in the side wall along the longitudinal direction of pipe section 01 can be about 3m, the vibration spacing can be about 0.8m, the concrete drop height during placement does not exceed 2m, and the vibration spacing of the bottom plate cross section is less than 0.8m, so that the pouring is uniform and the vibration is sufficient.

[0109] In this embodiment, during the pouring process, the pouring height of the partition wall 014 area is kept 0.5-1m higher than that of the side wall 015, and the pouring on both sides is kept uniform. The thickness of each layer is controlled at 0.3-0.5m. After each layer is poured, it is vibrated uniformly to avoid missed vibration and ensure the quality of vibration.

[0110] By adopting the S4 base plate pouring process, the pouring and vibration quality of difficult construction locations such as the bottom corner of pipe section 01 can be improved in a targeted manner during the pouring process, thereby improving the overall forming quality of pipe section 01.

[0111] S5. Close and lock the top corner template 202, pour concrete to form the top corner wall and top slab of the pipe section 01, and vibrate.

[0112] In this embodiment, the top plate of pipe section 01 can be poured from the top corner pouring hole, and the material can be directly placed at the top plate pouring hole 401. After the pouring is completed, the top corner pouring hole is sealed.

[0113] S6. After the concrete curing is completed, remove the side formwork assembly 200, the inner formwork assembly 300 and the bottom formwork assembly 100, and carry out the construction treatment of the outer surface of pipe section 01. Alternatively, after the first pouring section is formed, move the inner formwork assembly 300 and the side formwork assembly 200 along the longitudinal direction of pipe section 01, pour concrete to form the second pouring section of pipe section 01, and then carry out the construction treatment of the outer surface of pipe section 01.

[0114] In some alternative implementations, the side formwork assembly 200, the inner formwork assembly 300, and the rebar tying frame 700 can be reused for each pouring section according to the pouring section of pipe segment 01. The bottom formwork assembly 100 and the track mechanism 600 can be laid as a whole according to the length and width of pipe segment 01. After the concrete reaches the design strength, the side formwork assembly 200, the inner formwork assembly 300, and the rebar tying frame 700 can be used in a continuous operation.

[0115] This embodiment describes a construction method for a precast box-type pipe segment forming template system. By employing this system, a layered, naturally flowing, and continuously advancing concrete placement method is used for pouring. Based on the natural slope during concrete pumping, a pouring sequence is adopted from both sides towards the center in the cross-sectional direction. The cooperation of the bottom formwork assembly 100, side formwork assembly 200, and inner formwork assembly 300 enables the complete forming of the entire cross-section of pipe segment 01. Targeted pouring and vibration are applied to the bottom plate, bottom corners, and top corners of pipe segment 01, improving the forming quality of these areas. This method not only simplifies the template system structure and improves construction efficiency, but also overcomes the problem of template system floating and avoids leaving weak seepage points in pipe segment 01 due to post-sealing holes. Furthermore, by using a detachable bottom formwork 102, the entire surface of pipe segment 01 can be repaired and treated for seepage prevention and corrosion after the pipe segment 01 is formed, improving the overall service performance of pipe segment 01.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precast box-type pipe segment forming template system, characterized in that, include: The bottom mold assembly (100) includes a plurality of supports (101) arranged in an array and a plurality of bottom templates (102) spliced ​​together. The supports (101) are used to support the bottom templates (102), and the bottom templates (102) can be removed after the pipe section (01) is formed. The side formwork assembly (200) includes a side wall outer formwork (201), a top corner formwork (202), and a first support (203). The side wall outer formwork (201) is connected to the side of the first support (203). The top corner formwork (202) is hinged to the first support (203) and located above the side wall outer formwork (201). Two first supports (203) are symmetrically erected on the ground on both sides of the bottom formwork assembly (100). The two first supports (203) are connected by a first tie rod (204) and a second tie rod (205). The first tie rod (204) passes through the bottom formwork (102), and the second tie rod (205) is located above the pipe section (01). A top plate pouring hole (401) is formed between the oppositely arranged top corner formworks (202). The inner mold assembly (300) includes an inner template (301) and a second support. The second support is used to support the inner template (301) and form a casting chamber (400) around the inner mold assembly (300). The inner template (301) is provided with a plurality of bottom plate casting holes (402), and the side wall (015) template is provided with a plurality of side wall casting holes (209). The top plate casting hole (401), the bottom plate casting hole (402) and the side wall casting hole (209) are respectively connected to the casting chamber (400).

2. The precast box-type pipe segment forming template system according to claim 1, characterized in that, The support (101) is provided with a first support seat (103) and a second support seat (104) that can adjust the elevation of the bottom template (102). The bottom template (102) includes a beam template (1021), a patch template (1022) and a bottom corner template (1023). The beam template (1021) and the patch template (1022) are alternately arranged along the longitudinal direction of the pipe section (01). The first support seat (103) on at least two adjacent supports (101) supports the beam template (1021), and the second support seat (104) on two adjacent supports (101) supports the patch template (1022). The top surface of the beam template (1021) and the patch template (1022) is detachably connected to the bottom corner template (1023). The bottom corner template (1023) is used to form the bottom corner transition surface (012) of the pipe section (01).

3. The precast box-type pipe segment forming template system according to claim 1, characterized in that, An opening and closing adjustment mechanism (207) is provided between the top corner template (202) and the first support (203). The top corner templates (202) are arranged opposite to each other and are connected by a third tie rod (206) above the pipe section (01). The top corner template (202) is provided with a number of top corner pouring holes and top corner vibration holes.

4. The precast box-type pipe segment forming template system according to claim 3, characterized in that, The first support (203) includes a three-dimensional truss. The first support (203) is connected and fixed by a site-embedded structure (500). An adjustable foot (208) is provided at the bottom of the first support (203). The adjustable foot (208) is used to adjust the elevation of the first support (203).

5. The precast box-type pipe segment forming template system according to claim 1, characterized in that, The second support includes a main truss (302) and an adjustable strut assembly (303). The inner template (301) is slidably engaged with the main truss (302). The adjustable strut assembly (303) can move the inner template (301) closer to or away from the main truss (302). The main truss (302) is connected to a telescopic leg (304). The telescopic leg (304) can abut against the cast-in-place base plate of the pipe section (01) or pass through the base plate reinforcement cage to abut against the support pier (101).

6. The precast box-type pipe segment forming template system according to claim 5, characterized in that, The inner template (301) includes a top slab inner template (3011), a first wall inner template (3012), and a second wall inner template (3013). The bottom of the first wall inner template (3012) is hinged to a first bottom corner template (3014), and the bottom of the second wall inner template (3013) is hinged to a second bottom corner template (3015). The bottom slab pouring hole (402) is formed between the first bottom corner template (3014) and the second bottom corner template (3015). The first bottom corner template (3014) and the second bottom corner template (3015) are provided with a plurality of bottom corner vibration holes.

7. The precast box-type pipe segment forming template system according to claim 1, characterized in that, The template system also includes a track mechanism (600), which is capable of supporting the inner mold assembly (300) to move longitudinally along the pipe section (01). The track mechanism (600) abuts against the top surface of the cast-in-place base plate of the pipe section (01) or passes through the base plate reinforcement cage and abuts against the support pier (101).

8. The precast box-type pipe segment forming template system according to claim 7, characterized in that, The template system also includes a rebar tying frame (700) for assisting in the tying of rebars in the pipe section (01), and the track mechanism (600) is capable of supporting the rebar tying frame (700) to move longitudinally along the pipe section (01).

9. A construction method for precast box-type pipe segment forming templates, characterized in that, The prefabricated box-type pipe section (01) forming template system according to claim 8 is adopted, and includes the following steps: S1. Set up the support pier (101) on the site, install the bottom formwork (102) on the support pier (101), and tie the bottom plate reinforcement and part of the side wall (015) reinforcement of the first pouring section of pipe segment (01) on the bottom formwork (102); S2. Install the track mechanism (600), install the rebar binding frame (700) on the track mechanism (600), and bind the rebar of the top plate of the pipe section (01) and the remaining side wall (015); S3. Install the inner mold assembly (300) and the side mold assembly (200). The inner mold (301) is supported and fixed by the second bracket. The first bracket (203) is connected by the first tie rod (204) and the second tie rod (205) and is connected to the site pre-embedded structure (500). The inner mold assembly (300) and the side mold assembly (200) are not connected. S4. Keep the top corner template (202) in the unfolded state, pour the bottom plate and bottom corner wall of the concrete forming pipe section (01), and after vibration, pour the side wall (015) of the concrete forming pipe section (01). S5. Close and lock the top corner template (202), pour concrete to form the top corner wall and top plate of the pipe section (01), and vibrate it. S6. After the concrete curing is completed, remove the side formwork assembly (200), the inner formwork assembly (300) and the bottom formwork assembly (100), and carry out the construction treatment of the outer surface of the pipe section (01). Alternatively, after the first pouring section is formed, move the inner formwork assembly (300) and the side formwork assembly (200) along the longitudinal direction of the pipe section (01) to install the inner formwork assembly (300) and the side formwork assembly (200), pour concrete to form the second pouring section of the pipe section (01), and then carry out the construction treatment of the outer surface of the pipe section (01).

10. A construction method for a precast box-type pipe segment forming template according to claim 9, characterized in that, The pipe section (01) includes several compartments (013), and adjacent compartments (013) are simultaneously equipped with the inner mold assembly (300) to form a partition wall (014). S4 specifically includes: S4.

1. Use a pipe to extend from the top plate pouring hole (401) into the partition wall (014) area to fill the bottom chamfer of the partition wall (014); S4.

2. Using a chute, pour water symmetrically from the side wall pouring hole (209) to the pouring chamber (400) until the bottom corner of the side wall (015) is filled. S4.

3. A chute is used to extend from both ends of the pipe section (01) into the compartment (013) and pour into the bottom plate pouring hole (402) until the bottom plate and bottom corner wall are poured. S4.

4. Several vibration positions are arranged horizontally and vertically along the pipe section (01) for vibration. After completion, the side wall pouring hole (209) is closed.

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