Fabricated prestressed reinforced concrete bent frame and construction method thereof

Abstract

The invention provides an assembly type prestressed reinforced concrete bent frame and a construction method thereof. The assembly type prestressed reinforced concrete bent frame comprises two supports, two supporting column assemblies and a cover beam. A mounting groove is formed in each support; each supporting column assembly is correspondingly arranged in one mounting groove, and each supporting column assembly comprises a plurality of supporting column units arranged in the height direction; each supporting column unit comprises a pouring body, a first prestressed reinforcement and two first connecting panels; wherein the two first connecting panels are respectively arranged at the top and the bottom of the pouring body and are fixedly connected with the pouring body; the first prestressed reinforcement penetrates through the pouring body and the two first connecting panels, and anchorage devices are arranged at the two ends, protruding out of the first connecting panels, of the first prestressed reinforcement; every two adjacent supporting column units are connected with each other through the corresponding first connecting panel. The cover beam is arranged on the tops of the two supporting column assemblies and connected with the two supporting column assemblies. The construction process can be simplified, the construction progress is guaranteed, and meanwhile the tensile strength and the anti-seismic property of the bent frame are improved.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic engineering construction, and particularly to a precast prestressed reinforced concrete bent and its construction method. Background Art

[0002] Traditional bent for hydropower station gates is usually constructed on-site, which requires a construction process including formwork design, formwork installation, steel bar binding, concrete pouring, and form removal. Due to factors such as the uncertainty of the construction site environment and improper operation of construction workers, problems such as inaccurate formwork dimensions, verticality deviation, and poor concrete maintenance are likely to occur in the construction of the existing bent for gates, which greatly affects the project construction progress and construction cost. In addition, due to the certain height of the bent, if not properly controlled during concrete pouring, material segregation is likely to occur and finally honeycombing and pitting appear at the bottom, thus affecting the safety of gate operation. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of this application is to provide a precast prestressed reinforced concrete bent and its construction method, which can be mass-produced and standardized in the factory, has the characteristics of convenient transportation and simple on-site construction and assembly, can simplify the construction process, ensure the construction progress, and improve the quality of concrete pouring.

[0004] This application provides a precast prestressed reinforced concrete bent. The precast prestressed reinforced concrete bent includes two supports, two column assemblies, and a capping beam; each support is formed with an installation groove; each column assembly is correspondingly arranged in an installation groove, and each column assembly includes a plurality of column units arranged along the height direction; each column unit includes a casting body, a first prestressed steel bar, and two first connection panels; wherein the two first connection panels are respectively arranged at the top and bottom of the casting body and are fixedly connected to the casting body; the first prestressed steel bar penetrates through the casting body and the two first connection panels, and anchors are arranged at both ends of the first prestressed steel bar protruding from the first connection panels; two adjacent column units are connected to each other through the first connection panels; the capping beam is arranged at the top of the two column assemblies and is respectively connected to the two column assemblies.

[0005] According to the prefabricated prestressed reinforced concrete bent frame of the present application, since each column unit of the bearing, the capping beam and the column assembly can be independently processed and manufactured, it is convenient for formwork production and assembly, convenient for batch standardized production in the factory, has the characteristics of convenient transportation and simple on-site construction assembly, is easy to install and disassemble, and can achieve the effect of simplifying the construction process and ensuring the construction progress. Further, each column unit of the bearing, the capping beam and the column assembly is cast and produced in a factory environment, which is easy to control the casting environment temperature and carry out concrete curing, and further avoids the problem of excessive casting head drop that is likely to occur during the on-site integral casting of the traditional gate bent frame, improving the casting quality. In addition, the present application adopts a prestressed reinforced concrete structure. By combining the first prestressed steel bars with the first connection panel, a unified and complete skeleton structure is formed, which can effectively improve the integrity and wholeness of the bent frame, and improve the tensile strength and seismic performance of the bent frame through the prestressed steel bars.

[0006] According to some embodiments of the present application, the first connection panel is formed with a first avoidance groove and a connection boss, wherein the end of the first prestressed steel bar is received in the first avoidance groove, and the anchor is arranged in the first avoidance groove; the connection boss is adapted to connect another first connection panel.

[0007] According to some embodiments of the present application, the cast body is formed with a second avoidance groove at a portion opposite to the connection boss in the height direction.

[0008] According to some embodiments of the present application, the capping beam includes a capping beam main body and two groups of connection components. The connection components are arranged on the capping beam main body, and the connection components are connected to the column unit at the topmost part of the column assembly.

[0009] According to some embodiments of the present application, the connection component includes a second connection panel and a second prestressed steel bar; the second connection panel is fixedly connected to the capping beam main body, and the second connection panel is adapted to be connected to the first connection panel; the second prestressed steel bar extends along the height direction in the capping beam main body, and the second prestressed steel bar penetrates through the second connection panel, and an anchor is arranged at a portion of the second prestressed steel bar protruding from the second connection panel.

[0010] According to some embodiments of the present application, the capping beam further includes a third prestressed steel bar, and the third prestressed steel bar extends along the extending direction of the capping beam in the capping beam main body, and an anchor is arranged at a portion of the third prestressed steel bar protruding from the end face of the capping beam main body.

[0011] According to some embodiments of the present application, the first prestressed steel bar, and / or the second prestressed steel bar, and / or the third prestressed steel bar are configured as a plurality of spaced apart along the width direction of the capping beam.

[0012] According to some embodiments of the present application, the bottom of the bearing is connected to the column unit at the bottommost part of the column assembly.

[0013] According to some embodiments of the present application, the bearing is formed with a grouting hole, the casting body is formed with a first grouting duct, the capping beam is formed with a second grouting duct, and the grouting hole, the first grouting duct and the second grouting through hole are communicated.

[0014] The present application also provides a construction method for an assembled prestressed reinforced concrete bent frame, including the following steps:

[0015] Precast the column unit, and reserve a first grouting duct in the column unit;

[0016] Precast the capping beam, and reserve a second grouting duct in the capping beam;

[0017] Precast the bearing, and reserve a grouting hole in the bearing;

[0018] Transport the precast column unit, bearing and capping beam to the construction site for assembly;

[0019] Grout and pour the concrete through the second grouting duct reserved inside the capping beam, so that the concrete completely fills the second grouting duct, the first grouting duct and the grouting hole, and finally complete the construction of the entire assembled prestressed reinforced concrete bent frame after the concrete is completely solidified.

[0020] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0022] Figure 1 is a schematic structural diagram of an assembled prestressed reinforced concrete bent frame according to some embodiments of the present application;

[0023] Figure 2 is a schematic structural diagram of a column assembly according to some embodiments of the present application;

[0024] Figure 3 is a cross-sectional view of the structure of a column assembly according to some embodiments of the present application;

[0025] Figure 4 is a connection diagram of the first prestressed reinforcement and the first connection panel of a column assembly according to some embodiments of the present application;

[0026] Figure 5 is a schematic structural diagram of a bearing according to some embodiments of the present application;

[0027] Figure 6 is a cross-sectional view of the structure of a bearing according to some embodiments of the present application;

[0028] Figure 7 is a schematic structural view of a bent cap according to some embodiments of the present application;

[0029] Figure 8 is a cross-sectional structural view of a bent cap according to some embodiments of the present application;

[0030] Figure 9 is a schematic structural view of a connection assembly of a bent cap according to some embodiments of the present application.

[0031] Reference numerals:

[0032] Bearing 1; mounting groove 101; first high-strength bolt 102; grouting hole 103; reinforcing rib 104;

[0033] Strut assembly 2; strut unit 21; first prestressed steel bar 201; top first connection panel 202; bottom first connection panel 203; cast-in-place body 204; second high-strength bolt 205; connection boss 206; first relief groove 207; second relief groove 208; first grouting duct 209; third high-strength bolt 210;

[0034] Bent cap 3; bent cap main body 301; second prestressed steel bar 302; second connection panel 303; third prestressed steel bar 304; second grouting duct 305. Detailed implementation manners

[0035] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0036] Reference is made below to Figures 1-9 describe a precast prestressed reinforced concrete bent according to an embodiment of the present application.

[0037] The present application provides a precast prestressed reinforced concrete bent frame. The precast prestressed reinforced concrete bent frame includes two supports 1, two column assemblies 2 and a capping beam 3; each support 1 is formed with a mounting groove 101; each column assembly 2 is correspondingly disposed in a mounting groove 101, and each column assembly 2 includes a plurality of column units 21 arranged along the height direction; each column unit 21 includes a cast body 204, a first prestressed reinforcement 201 and two first connection panels; wherein the two first connection panels are respectively disposed at the top and bottom of the cast body 204 and fixedly connected to the cast body 204; the first prestressed reinforcement penetrates through the cast body 204 and the two first connection panels, and anchors are provided at both ends of the first prestressed reinforcement 201 protruding from the first connection panels; two adjacent column units 21 are connected to each other through the first connection panels; the capping beam 3 is disposed at the top of the two column assemblies 2 and is respectively connected to the two column assemblies 2.

[0038] For the precast prestressed reinforced concrete bent frame according to the present application, the support 1, the column assembly 2 and the capping beam 3 are all independent structures and can be connected and fixed, and the column assembly 2 is formed by connecting a plurality of interconnected column units 21; the support 1, the capping beam 3 and each column unit 21 can be independently processed and manufactured, and then transported to the construction site for assembly. Among them, each column unit 21 can be prestressed in advance through the first prestressed reinforcement 201 to improve the seismic performance and tensile strength of the column unit 21; the top first connection panel 202 and the bottom first connection panel 202 provide an anchoring foundation for installing the first prestressed reinforcement 201 in the column unit 21, and provide a foundation for connecting each column unit 21 with another column unit 21 or the support 1 and the capping beam 3.

[0039] For the precast prestressed reinforced concrete bent frame according to the present application, since the support 1, the capping beam 3 and each column unit 21 of the column assembly 2 can be independently processed and manufactured, it is convenient to control the structural dimensions, formwork fabrication and assembly, and is convenient for batch standardized fabrication in the factory. It has the characteristics of convenient transportation and simple on-site construction assembly, is easy to install and disassemble, and can simplify the construction process and ensure the construction progress. Further, the support 1, the capping beam 3 and each column unit 21 of the column assembly 2 are cast and produced in a factory environment, which is easy to control the pouring environment temperature and perform concrete curing, and further avoids the problem of excessive pouring head difference that is likely to occur during the on-site integral pouring of the traditional gate bent frame, improving the pouring quality. In addition, the present application adopts a prestressed reinforced concrete structure. By combining the first prestressed reinforcement 201 with the first connection panel, a unified and complete skeleton structure is formed, which can effectively improve the integrity and wholeness of the bent frame, and improve the tensile strength and seismic performance of the bent frame through the prestressed reinforcement.

[0040] Further, when the first prestressed steel bar 201 and the two first connection panels are cast in the casting body 204, they are preset in the casting formwork of the casting body 204, so as to fix the casting body 204 into one body, improve the structural strength, and simplify the processing process of the column unit 21.

[0041] In some embodiments, the end anchors of the first prestressed steel bar 201 are selected as the second high-strength bolts 205, and the first connection panels of the two column units 21 are connected and fixed by the third high-strength bolts 210.

[0042] According to some embodiments of the present application, the first connection panel is formed with a first avoidance groove 207 and a connection boss 206. The end of the first prestressed steel bar 201 is received in the first avoidance groove 207, and the anchor is arranged in the first avoidance groove 207; the connection boss 206 is adapted to connect another first connection panel. In this embodiment, by arranging the first avoidance groove 207 to receive the end of the first prestressed steel bar 201 and the second high-strength bolt 205, the structural interference between two adjacent column units 21 can be avoided; by arranging the connection boss 206, the structural interference between the third high-strength bolt 210 and the casting body 204 can be avoided.

[0043] According to some embodiments of the present application, the part of the casting body 204 facing the connection boss 206 in the height direction is formed with a second avoidance groove 208. In this embodiment, by arranging the second avoidance groove 208, the structural interference between the third high-strength bolt 210 and the casting body 204 can be further avoided.

[0044] According to some embodiments of the present application, the capping beam 3 includes a capping beam main body 301 and two sets of connection components. The connection components are arranged on the capping beam main body 301 and are connected to the column unit 21 at the top of the column assembly 2. In this embodiment, as Figures 7-9 shown, by arranging the connection components, the connection stability between the column assembly 2 and the capping beam 3 can be ensured.

[0045] According to some embodiments of the present application, the connecting component includes a second connecting panel 303 and a second prestressed steel bar 302. The second connecting panel 303 is fixedly connected to the capping beam main body 301 and is adapted to be connected to the first connecting panel; the second prestressed steel bar 302 extends along the height direction in the capping beam main body 301, and the second prestressed steel bar 302 penetrates through the second connecting panel 303. An anchor is provided on the part of the second prestressed steel bar 302 protruding from the second connecting panel 303. In this embodiment, the capping beam 3 is connected to the topmost strut unit 21 in the strut assembly 2 through the second connecting panel 303. Specifically, the first connecting panel and the second connecting panel 303 are connected by high-strength bolts; the second prestressed steel bar 302 can enhance the structural strength of the capping beam 3 and improve the seismic performance of the bent frame. The connection method between the capping beam 3 and the strut assembly 2 in this embodiment is simple and the connection method with each strut unit 21 is the same, which can improve the construction efficiency.

[0046] In some embodiments, the first connecting panel and the second connecting panel 303 are made of steel.

[0047] According to some embodiments of the present application, the capping beam 3 further includes a third prestressed steel bar 304. The third prestressed steel bar 304 extends along the extension direction of the capping beam 3 in the capping beam main body 301. An anchor is provided on the part of the third prestressed steel bar 304 protruding from the end face of the capping beam main body 301. In this embodiment, as Figures 7-9 shown, by arranging the third prestressed steel bar 304 along the extension direction of the capping beam 3, the structural strength of the capping beam 3 can be further enhanced, and the tensile strength and seismic performance of the bent frame can be improved.

[0048] In some embodiments, the anchors of the second prestressed steel bar 302 and the third prestressed steel bar 304 can both adopt high-strength bolts.

[0049] According to some embodiments of the present application, the first prestressed steel bar 201, and / or the second prestressed steel bar 302, and / or the third prestressed steel bar 304 are configured as multiple ones spaced apart along the width direction of the capping beam 3. In this embodiment, by increasing the number of the first prestressed steel bar 201, and / or the second prestressed steel bar 302, and / or the third prestressed steel bar 304, the structural strength of the capping beam 3 can be significantly improved, and the tensile strength and seismic performance of the bent frame can be improved.

[0050] According to some embodiments of the present application, the bottom of the bearing 1 is connected to the bottommost strut unit 21 in the strut assembly 2. In this embodiment, as Figure 5 、 6 shown, by connecting the bottom of the bearing 1 to the bottommost strut unit 21 in the strut assembly 2, the connection strength and stability between the bearing 1 and the strut assembly 2 can be improved in addition to the groove fit, and the stability and long-term effectiveness of the bent frame can be ensured.

[0051] According to some embodiments of the present application, the support 1 is formed with a grouting hole 103, the casting body 204 is formed with a first grouting duct 209, and the capping beam 3 is formed with a second grouting duct 305. The grouting hole 103, the first grouting duct 209, and the second grouting duct 305 are communicated. In this embodiment, as Figure 5 , 6 shown, by providing the grouting hole 103, the first grouting duct 209, and the second grouting duct 305, grouting can be carried out after the bent assembly is completed, so that the support 1, the column assembly 2, and the capping beam 3 are grouted and solidified into one body, forming the overall structure of the bent, and improving the stability and long-term performance of the bent.

[0052] Furthermore, the first connection panel and the second connection panel 303 are correspondingly provided with avoidance holes for the grouting hole 103, the first grouting duct 209, and the second grouting duct 305, so as to realize the communication of the grouting hole 103, the first grouting duct 209, and the second grouting duct 305.

[0053] The present application also proposes a construction method for an assembled prestressed reinforced concrete bent, including the following steps:

[0054] S1. Precast the column unit 21: Fix the first connection panel 202 at the top and the first connection panel 203 at the bottom of the column assembly 2 to the casting formwork. Subsequently, pass the first prestressed steel bar 201 inside the column assembly 2 through the reserved hole positions corresponding to the two first connection panels, and install high-strength bolts for anchoring. Apply tension to the first prestressed steel bar 201, and then pour concrete. After the concrete solidifies, remove the casting formwork; wherein, a first grouting duct 209 is reserved in the column unit 21;

[0055] S2. Precast the capping beam: Fix the connection components of the capping beam 3 to the casting formwork. Subsequently, pass the second prestressed steel bar 302 and the third prestressed steel bar 304 inside the capping beam 3 through the corresponding holes in the formwork, and install high-strength bolts 306 for anchoring. Apply tension to the third prestressed steel bar 304, and then pour concrete. After the concrete solidifies, remove the casting formwork; wherein, a second grouting duct 305 is reserved in the capping beam 3;

[0056] S3. Precast the support 1, and a grouting hole 103 is reserved in the support 1;

[0057] S4. Transport the precast column unit, support, and capping beam to the construction site for assembly:

[0058] First, use a crane to hoist the support 1 onto the pier, align it with the reserved steel bars on the pier surface, and install the first high-strength bolts 102 connected to the reserved steel bars on the pier surface, so that the support 1 is fixedly connected to the pier;

[0059] After the support 1 is installed, then use a crane to hoist the column unit 21 of the column assembly 2 onto the support 1 and align it. Connect the column unit 21 and the support 1 with the first high-strength bolt 102 to complete the fixed connection of the column assembly 2 with the support 1 and the pier;

[0060] Use a crane to hoist the column unit 21 and align it with the already installed column unit 21, and use the third high-strength bolt 210 to fixedly connect the upper column unit 21 and the lower column unit 21 to each other; repeat the above operation to complete the installation construction of the column unit 21 one by one; among them, the number of column assemblies 2 can be selected according to actual needs to meet the design requirements of the engineering project, and finally complete the construction of the first column assembly 2 after the top column unit 21 is installed; repeat the above operation to complete the construction of the column assembly 2;

[0061] Use a crane to hoist the capping beam 3 onto the top of the column assembly 2 and align it, and use high-strength bolts to fixedly connect the capping beam 3 and the column assembly 2.

[0062] S5. Pour the concrete through the second grouting hole 305 reserved inside the capping beam 3 so that the concrete completely fills the second grouting hole 305, the first grouting hole 209 and the grouting hole 103. After the concrete completely solidifies, finally complete the construction of the entire precast prestressed reinforced concrete bent frame.

[0063] According to the construction method of the precast prestressed reinforced concrete bent frame of the present application, the construction of the precast prestressed reinforced concrete bent frame can be efficiently completed, the construction convenience can be improved, and the construction quality and progress control can be ensured; and the problem of too large pouring drop that is likely to occur in the traditional gate bent frame can be avoided, the quality of the precast prestressed reinforced concrete bent frame can be improved, the stability of the precast prestressed reinforced concrete bent frame can be improved, so that it can be used for a long time, and the operation safety of the hydropower station can be improved.

[0064] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0065] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0066] In the description of the present application, the meaning of "a plurality" is two or more.

[0067] In the description of the present application, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not being direct but through additional features therebetween.

[0068] In the description of the present application, a first feature being "above", "over" or "on top of" a second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0069] In the description of this specification, descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A prefabricated prestressed reinforced concrete bent frame, characterized in that, Comprising: Two supports, each of the supports being formed with a mounting groove; Two pillar assemblies, each of the pillar assemblies being correspondingly disposed in one of the mounting grooves, each of the pillar assemblies including a plurality of pillar units sequentially arranged in the height direction; each of the pillar units including a cast body, a first prestressed steel bar, and two first connection panels; wherein The two first connection panels are respectively disposed at the top and bottom of the cast body and fixedly connected to the cast body; the first prestressed steel bar penetrates through the cast body and the two first connection panels, and anchors are provided at both ends of the first prestressed steel bar protruding from the first connection panels; Two adjacent pillar units are connected to each other through the first connection panels; A capping beam, the capping beam being disposed at the tops of the two pillar assemblies and respectively connected to the two pillar assemblies.

2. The prefabricated prestressed reinforced concrete bent frame according to claim 1, wherein The first connection panel is formed with a first avoidance groove and a connection boss, wherein The end of the first prestressed steel bar is received in the first avoidance groove, and the anchor is disposed in the first avoidance groove; The connection boss is adapted to connect to another first connection panel.

3. The prefabricated prestressed reinforced concrete bent frame according to claim 2, wherein A second avoidance groove is formed in a portion of the cast body that is opposite to the connection boss in the height direction.

4. The prefabricated prestressed reinforced concrete bent frame according to claim 1, wherein The capping beam includes: A capping beam body; Two sets of connection components, the connection components being disposed on the capping beam body, and the connection components being connected to the pillar unit located at the topmost of the pillar assemblies.

5. The prefabricated prestressed reinforced concrete bent frame according to claim 4, characterized in that, The connection component includes: A second connection panel, the second connection panel being fixedly connected to the capping beam body, and the second connection panel being adapted to be connected to the first connection panel; A second prestressed steel bar, the second prestressed steel bar extending in the height direction in the capping beam body, and the second prestressed steel bar penetrating through the second connection panel, and an anchor being provided at a portion of the second prestressed steel bar protruding from the second connection panel.

6. The prefabricated prestressed reinforced concrete bent frame according to claim 5, characterized in that, The capping beam further includes: A third prestressed steel bar, the third prestressed steel bar extending in the extending direction of the capping beam in the capping beam body, and an anchor being provided at a portion of the third prestressed steel bar protruding from the end face of the capping beam body.

7. The prefabricated prestressed reinforced concrete bent frame according to claim 6, characterized in that, The first prestressed steel bar, and / or the second prestressed steel bar, and / or the third prestressed steel bar are configured as a plurality of spaced apart in the width direction of the capping beam.

8. The prefabricated prestressed reinforced concrete bent frame according to claim 1, wherein, The bottom of the support is connected to the pillar unit located at the bottommost of the pillar assemblies.

9. The prefabricated prestressed reinforced concrete bent frame according to claim 1, wherein, The support is formed with a grouting hole, the cast body is formed with a first grouting hole channel, the capping beam is formed with a second grouting hole channel, and the grouting hole, the first grouting hole channel, and the second grouting hole channel are communicated.

10. A construction method for an assembled prestressed reinforced concrete bent frame, characterized in that, Including the following steps: Precasting the pillar unit, and reserving a first grouting hole channel in the pillar unit; Precasting the capping beam, and reserving a second grouting hole channel in the capping beam; Precasting the support, and reserving a grouting hole in the support; Transporting the precast pillar unit, the support, and the capping beam to the construction site for assembly; Grout and pour the concrete through the second grouting duct reserved inside the capping beam, so that the concrete completely fills the second grouting duct, the first grouting duct and the grouting hole. After the concrete completely solidifies, the construction of the entire precast prestressed reinforced concrete bent frame is finally completed.

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