Cast-in-place box girder bottom web reinforcement installation component and method

Abstract

The present application relates to box girder construction technical field, disclose a kind of cast-in-place box girder bottom web reinforcement installation component and method, including bottom plate reinforcement frame and web reinforcement frame, bottom plate reinforcement frame includes by a plurality of groups of first component parallelly arranged from top to bottom, first component is detachably connected by vertical rod each other, web reinforcement frame includes third component and a plurality of groups of second component, a plurality of groups of second component are sequentially detachably connected from top to bottom, the second component of bottommost and third component detachably link, the one end of third component and the one end of the first component of bottommost detachably link, the other end and the one end of another group of third component detachably connect, the second component of two groups of web reinforcement frame is detachably connected by cross bar each other corresponding to each other.The present application can not only make full use of working face, reduce construction procedure, but also replace manual marking and adjust reinforcement spacing, effectively improve the efficiency and construction precision of on-site construction.

Description

Technical Field

[0001] The invention relates to the technical field of box girder construction, and in particular to a cast-in-situ box girder bottom web steel bar installation component and method. Background Art

[0002] Reinforced concrete box girders are divided into precast and cast-in-place. Cast-in-place box girders are mostly used in large continuous bridges. Currently, when installing the bottom and web reinforcement, workers first mark the position of the main bottom slab reinforcement with a marker. Then, they tie the main bottom slab reinforcement, i.e., the lower slab reinforcement, followed by the upper slab reinforcement and locating bars. After the bottom slab reinforcement is tied, the outer web reinforcement is then tied, and finally, the inner web reinforcement.

[0003] There are at least the following problems in the existing technology: first, the working surface cannot be fully utilized during construction, the construction efficiency is low, and the construction steps are too many; second, the spacing between steel bars needs to be manually marked and adjusted, which is not only time-consuming and labor-intensive but also cannot guarantee accuracy. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention develops a cast-in-place box girder bottom web reinforcement installation component and method. The present invention can fully utilize the working surface and reduce construction steps, and can replace manual marking to adjust the reinforcement spacing, effectively improving the efficiency and accuracy of on-site construction.

[0005] The technical solution to the technical problem solved by the present invention is as follows: on the one hand, the present invention discloses a cast-in-place box girder bottom web reinforcement installation component, including a bottom plate reinforcement frame and a web reinforcement frame, the bottom plate reinforcement frame includes several groups of first components arranged in parallel from top to bottom, the first components are detachably connected to each other through vertical rods, the web reinforcement frame includes a third component and several groups of second components, the several groups of second components are detachably connected in sequence from top to bottom, the second component at the bottom is detachably linked to the third component, one end of the third component is detachably linked to one end of the first component at the bottom, and the other end is detachably connected to one end of the third component of another group, and the second components of the two groups of web reinforcement frames are detachably connected to each other through horizontal rods.

[0006] As an optimization, the top of the first component is symmetrically provided with two sets of first mounting slots extending downward, and the front side wall is provided with two sets of first limiting holes, each of which is connected to the first mounting slots. The end surfaces at both ends are respectively provided with first slots and first inserts. The first mounting slots allow the vertical rod to be inserted; the first limiting holes allow the vertical rod to be fixed and connected to the vertical rod; and the first slots and first inserts facilitate connection with other components, making adaptation easier.

[0007] As an optimization, the vertical rods are evenly distributed with several sets of vertical rod positioning holes. The ends of the vertical rods are respectively located in the first mounting slots of the upper and lower sets of first components. One set of vertical rod positioning holes is aligned with the first limiting holes. Positioning pins are provided in this set of vertical rod positioning holes and the first limiting holes. By providing the positioning holes, the positioning pins can be used to connect the vertical rods to the first component.

[0008] As an optimization, a first groove opening upward is provided at the top center of the first component, and the first groove is arranged between the two sets of first mounting grooves. By providing the first groove, the bottom plate reinforcement can be better positioned, thereby improving construction accuracy.

[0009] As an optimization, the third component has a third mounting slot at the top, and a third slot and third insert at each end. The third insert of one set of third components is installed in the third slot of another set of third components, and the third slot of one set of third components is installed in the first insert of the bottommost first component. The third mounting slot enables connection with the second component; the third slot and third insert enable the third components to be connected and assembled with each other and with the first component.

[0010] As an optimization, a second slot is provided on the top of the second component, a second plug-in block that matches the second slot is provided on the bottom, two groups of second installation slots that are symmetrical up and down are provided on the left and right side walls, a second groove is provided in the middle of the right side wall, and two groups of second limiting holes are provided on the front side wall. The second limiting holes are respectively connected to the second installation slots. The second groove is set between the two groups of second installation slots and opens to the right. The second plug-in block of the upper second component is set in the second slot of the lower second component, and the second plug-in block of the bottom second component is set in the third installation slot. By providing the second slot and the second plug-in block, the second components can be assembled with each other, and the bottom second component can also be assembled with the third component; by providing the second installation slot and the second limiting hole, it can cooperate with the cross bar for fixed assembly, improve the stability of the web reinforcement frame, and increase the construction accuracy; by providing the second groove, the web reinforcement can be better positioned, and the construction accuracy can be improved.

[0011] As an optimization, the crossbar is provided with a crossbar positioning hole. The two ends of the crossbar pass through the second mounting slots of the two horizontal sets of second components. The crossbar positioning hole is aligned with the second limiting holes. The crossbar positioning hole and the second limiting holes are provided with a positioning pin. By providing the crossbar positioning hole, the positioning pin can be connected to the second limiting hole, thereby fixing the second component to the crossbar, ensuring connection strength, improving stability, and enhancing construction accuracy.

[0012] As an optimization, the top inner wall of the second groove opening is horizontal, and the bottom inner wall of the opening is curved. By setting the top inner wall of the second groove opening horizontal, it is easier to insert the web reinforcement; by setting the bottom inner wall of the opening as a curved inner wall, it can prevent the web reinforcement from falling out of the second groove, effectively positioning the web reinforcement and improving construction accuracy.

[0013] On the other hand, the present invention also discloses a method for installing a cast-in-place box girder bottom web reinforcement installation component, comprising the following installation steps:

[0014] S1. Assemble the bottom plate reinforcement frame. Assemble two groups of first components on the bottom plate through vertical rods and positioning pins to form the bottom plate reinforcement frame. Insert the two ends of the two groups of vertical rods into the first installation grooves of the two groups of first components, respectively. Insert the four groups of positioning pins into the corresponding vertical rod positioning holes and first limiting holes, respectively. Fix the first components and the vertical rods to form the bottom plate reinforcement frame.

[0015] S2. Assemble the web reinforcement frame: assemble several groups of second members and two groups of third members into a web reinforcement frame using cross bars and positioning pins. Sequentially connect and assemble several groups of second members through the second slots and second inserts. Insert the second insert of the bottom second member into the third mounting slot of the third member. Then, connect and assemble two groups of third members through the corresponding third slots and third inserts.

[0016] S3, assembling the components as a whole, assembling the bottom plate reinforcement frame and the web reinforcement frame into a whole, and connecting and assembling the third slot of a set of third components with the first plug block of the first component;

[0017] S4. Prepare for binding: Place the two groups of components as a whole on both ends of the steel bars, place the bottom plate steel bars on the first grooves of the upper and lower groups of first components, and place the web steel bars on the second grooves of the inner and outer second components respectively;

[0018] S5. Tie the steel bars. First tie the lower bottom plate steel bars and the outer web steel bars at the same time, then tie the upper bottom plate steel bars and the inner web steel bars at the same time.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By arranging a bottom plate reinforcement frame and a web reinforcement frame on the bottom plate, the bottom plate working surface can be fully utilized to support and position the bottom plate reinforcement and the web reinforcement respectively, thereby improving the overall construction efficiency and construction accuracy. The lower bottom plate reinforcement and the outer web reinforcement can be tied at the same time, and then the upper bottom plate reinforcement and the inner web reinforcement can be tied at the same time, thereby changing the construction sequence and reducing the construction steps. By arranging a detachable connection between the first component and the vertical rod, the bottom plate reinforcement frame can be quickly assembled during construction to support the bottom plate reinforcement. The fixed spacing formed by the connection between the first component and the vertical rod replaces the manual adjustment of the reinforcement spacing, thereby improving the construction progress and facilitating disassembly after the tying is completed. By arranging a third component, a second component and a cross bar, the web reinforcement frame can be quickly assembled during construction, so that the second component supports multiple groups of web reinforcements. The fixed spacing formed makes the position of each web reinforcement accurate, thereby replacing the manual adjustment of the reinforcement spacing, improving the construction accuracy and facilitating disassembly after the tying is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0022] Figure 2 This is a three-dimensional diagram of a first component in an embodiment of the present invention.

[0023] Figure 3 This is a three-dimensional diagram of a vertical rod in an embodiment of the present invention.

[0024] Figure 4 This is a three-dimensional diagram of the third component in an embodiment of the present invention.

[0025] Figure 5 This is a three-dimensional diagram of the second component in one embodiment of the present invention.

[0026] Figure 6 This is a three-dimensional diagram of a cross bar in one embodiment of the present invention.

[0027] Figure 7 This is a three-dimensional diagram of a positioning pin in an embodiment of the present invention.

[0028] In the figure, 1, bottom plate reinforcement frame; 2, web reinforcement frame; 3, first member; 4, vertical rod; 5, third member; 6, second member; 7, cross bar; 8, positioning pin;

[0029] 31. First mounting slot; 32. First limiting hole; 33. First slot; 34. First insert block; 35. First groove;

[0030] 41. Vertical rod positioning hole;

[0031] 51. Third mounting slot; 52. Third slot; 53. Third insert;

[0032] 61. Second slot; 62. Second insert block; 63. Second mounting slot; 64. Second groove; 65. Second limiting hole;

[0033] 71. Crossbar positioning hole. DETAILED DESCRIPTION

[0034] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0035] Example 1

[0036] Figures 1 to 7 A schematic diagram of an embodiment of the present invention is shown in FIG. Figure 1 As shown, the bottom web reinforcement installation component of the cast-in-place box girder includes at least one group of bottom plate reinforcement frames 1 and two groups of web reinforcement frames 2. The bottom plate reinforcement frame 1 includes several groups of first members 3 arranged in parallel from top to bottom. The first members 3 are detachably connected to each other through vertical rods 4. The web reinforcement frame 2 includes a third member 5 and several groups of second members 6. The several groups of second members 6 are detachably connected from top to bottom. The second member 6 at the bottom is detachably linked to the third member 5. One end of the third member 5 is detachably linked to one end of the first member 3 at the bottom, and the other end is detachably connected to one end of the third member 5 of another group of web reinforcement frames 2. The second members 6 of the two groups of web reinforcement frames 2 are detachably connected to each other through cross bars 7.

[0037] By arranging the bottom plate reinforcement frame 1 and the web reinforcement frame 2, the bottom plate reinforcement and the web reinforcement can be supported and positioned respectively, thereby improving the overall construction efficiency and construction accuracy. The lower bottom plate reinforcement and the outer web reinforcement can be tied at the same time, and then the upper bottom plate reinforcement and the inner web reinforcement can be tied at the same time, thereby changing the construction sequence and reducing the construction steps. By arranging the first component 3 and the vertical rod 4 to be detachably connected, the bottom plate reinforcement frame 1 can be quickly assembled during construction to support the bottom plate reinforcement. The fixed spacing formed by the connection of the first component 3 and the vertical rod 4 replaces the manual adjustment of the reinforcement spacing, thereby improving the construction progress and facilitating disassembly after the tying is completed. By arranging the third component 5, the second component 6 and the cross bar 7, the web reinforcement frame 2 can be quickly assembled during construction, so that the second component 6 supports multiple groups of web reinforcements. The fixed spacing formed makes the position of each web reinforcement accurate, thereby replacing the manual adjustment of the reinforcement spacing, improving construction accuracy, and facilitating disassembly after the tying is completed.

[0038] like Figure 2As shown, the first component 3 is made of ABS plastic, with a width of 4 cm and a height of 4 cm. The length is adapted to the spacing of the longitudinal reinforcement bars of the box girder bottom plate. Two sets of first mounting slots 31 are symmetrically provided on the top, extending downward. The first mounting slots 31 are 2 cm long, 1 cm wide, and 4 cm high. Two sets of first limiting holes 32 are provided on the front side wall, each with a diameter of 3 mm. The first limiting holes 32 are connected to the first mounting slots 31. The end surfaces at both ends are provided with first slots 33 and first inserts 34, respectively. The first slots 33 and first inserts 34 are both 2 cm long, 2 cm wide, and 1 cm high. The first mounting slots 31 allow the vertical rod 4 to be inserted; the first limiting holes 32 allow the vertical rod 4 to be fixed and connected to the vertical rod 4; and the first slots 33 and first inserts 34 facilitate connection with other components and facilitate adaptation.

[0039] like Figure 3 、 Figure 7 As shown, the vertical rod 4 is made of ABS plastic, with a length of 2 cm and a width of 1 cm. The height is adapted to the box girder bottom plate protective layer and the spacing of the longitudinal reinforcement rows. Several groups of vertical rod positioning holes 41 are evenly distributed on the vertical rod 4. The vertical rod positioning holes 41 have a diameter of 3 mm and a depth of 1 cm. The ends of the vertical rod 4 are respectively located in the first mounting grooves 31 of the upper and lower groups of first components 3. One group of vertical rod positioning holes 41 is aligned with the first limiting holes 32. Positioning pins 8 are provided in this group of vertical rod positioning holes 41 and first limiting holes 32. The positioning pins 8 have a diameter of 3 mm and a length of 2 cm. The outer ends of the positioning pins 8 are also provided with a handle. The positioning holes 41 enable the positioning pins 8 to be used to connect the vertical rod 4 to the first component 3.

[0040] A first groove 35 with an upward opening is provided at the center of the top of the first member 3. The first groove 35 is disposed between the two sets of first mounting grooves 31. The cross section of the first groove 35 is semicircular and the diameter of the first groove 35 is 26 mm. The provision of the first groove 35 allows for better positioning of the bottom plate reinforcement and improves construction accuracy.

[0041] like Figure 4As shown, the third member 5 is made of ABS plastic, with a width of 4 cm and a height of 4 cm. Its length matches the spacing between the longitudinal reinforcement bars of the box girder bottom plate. A third vertical mounting slot 51 is provided at the top. A third slot 52 and a third insert 53 are provided at each end of the third member 5. Both the third slot 52 and the third insert 53 are 2 cm long, 2 cm wide, and 1 cm high. The third insert 53 of one set of third members 5 is installed within the third slot 52 of another set of third members 5. The third slot 52 of one set of third members 5 is also installed within the first insert 34 of the bottommost first member 3. The third mounting slot 51 enables connection with the second member 6. The third slot 52 and the third insert 53 enable the third members 5 to be connected and assembled with each other and with the first member 3.

[0042] like Figure 5 As shown, the second component 6 is made of ABS plastic, and when placed horizontally, its width is 4 cm, its height is 4 cm, and its length is adapted to the spacing of the longitudinal reinforcement of the box girder web. A second slot 61 is provided on the top of the second component 6, and a second plug 62 is provided on the bottom to match the second slot 61. The length of the second slot 61 and the second plug 62 are both 2 cm, the width are both 2 cm, and the height are both 1 cm. Two sets of second symmetrical mounting grooves 63 are provided on the left and right side walls of the second component 6. The length of the second mounting groove 63 is 2 cm, the width is 1 cm, and the height is 4 cm. The second component 6 A second groove 64 is provided in the middle of the right side wall, and two groups of second limiting holes 65 are provided on the front side wall, with a hole diameter of 3mm. The second limiting holes 65 are respectively connected to the second mounting groove 63. The second groove 64 is set between the two groups of second mounting grooves 63, opening to the right, with a cross-section of a superior arc and a diameter of 26mm. When placed vertically, its center line is 1cm away from the right side, and the excess arc surface on one side is horizontally cut off. The second plug 62 of the upper second component 6 is set in the second slot 61 of the lower second component 6, and the second plug 62 of the bottom second component 6 is set in the third mounting groove 51. By providing the second slot 61 and the second plug 62, the second components 6 can be assembled with each other, and the bottom second component 6 can also be assembled with the third component 5; by providing the second mounting groove 63 and the second limiting holes 65, it can cooperate with the cross bar 7 for fixed assembly, thereby improving the stability of the web reinforcement frame 2 and increasing the construction accuracy; by providing the second groove 64, the web reinforcement can be better positioned and the construction accuracy can be improved.

[0043] like Figure 6 、 Figure 7As shown, the crossbar 7 is provided with a crossbar positioning hole 71. The two ends of the crossbar 7 respectively pass through the second mounting slots 63 of the two horizontal groups of second components 6. The crossbar positioning holes 71 are aligned with the second limiting holes 65. The crossbar positioning holes 71 and the second limiting holes 65 are provided with positioning pins 8. The crossbar 7 is identical to the vertical rod 4. By providing the crossbar positioning holes 71, the positioning pins 8 can be connected to the second limiting holes 65, thereby fixing the second component 6 and the crossbar 7, ensuring the connection strength, improving stability, and improving construction accuracy.

[0044] The top inner wall of the second groove 64 is horizontal, while the bottom inner wall is curved. This makes it easier to insert the web reinforcement bars. The curved bottom inner wall prevents the web reinforcement bars from falling out of the second groove 64, effectively positioning the web reinforcement bars and improving construction accuracy.

[0045] Example 2

[0046] The difference between the embodiment 1 and the embodiment 2 is that the third mounting groove 51 of the third component 5 is arranged to be inclined, and the inclination angle is adapted to the angle between the bottom plate and the web of the box beam, which can improve the adaptability of the component.

[0047] When the present invention adopts the cast-in-situ box beam bottom web steel bar installation component for construction, the installation construction method includes the following steps:

[0048] S1, assembling the bottom plate reinforcement frame 1. If there is only one set of bottom plate reinforcement frame 1, assemble the two groups of first components 3 on the bottom plate through the vertical rods 4 and the positioning pins 8 to form the bottom plate reinforcement frame 1. The two ends of the two groups of vertical rods 4 are respectively inserted into the first mounting grooves 31 of the two groups of first components 3. The four groups of positioning pins 8 are respectively inserted into the corresponding vertical rod positioning holes 41 and the first limiting holes 32. The first components 3 and the vertical rods 4 are fixedly connected to form the bottom plate reinforcement frame 1. If there are two sets of bottom plate reinforcement frames 1, the two groups of first components 3 on the upper layer are connected to each other through the first slots 33 and the first plug blocks 34, and the two groups of first components 3 on the lower layer are also connected to each other through the first slots 33 and the first plug blocks 34.

[0049] S2. Assemble the web reinforcement frame 2. Assemble several groups of second members 6 and two groups of third members 5 into the web reinforcement frame 2 through the crossbar 7 and the positioning pin 8. Connect and assemble several groups of second members 6 in sequence through the second slots 61 and the second plug blocks 62. Insert the second plug block 62 of the bottom second member 6 into the third installation slot 51 of the third member 5. Connect and assemble the two groups of third members 5 through the corresponding third slots 52 and third plug blocks 53.

[0050] S3, assembling the components as a whole, assembling the bottom plate reinforcement frame 1 and the web reinforcement frame 2 into a whole, and connecting and assembling the third slots 52 of a set of third components 5 with the first plug-in block 34 of the first component 3;

[0051] S4, lashing preparation, placing the two groups of components as a whole on both ends of the steel bars, placing the bottom plate steel bars on the first grooves 35 of the upper and lower groups of first components 3, and placing the web steel bars on the second grooves 64 of the inner and outer second components 6;

[0052] S5. Tie the steel bars. First tie the lower bottom plate steel bars and the outer web steel bars at the same time, then tie the upper bottom plate steel bars and the inner web steel bars at the same time.

[0053] By arranging the bottom plate reinforcement frame 1 and the web reinforcement frame 2, the bottom plate reinforcement and the web reinforcement can be supported and positioned respectively, thereby improving the overall construction efficiency and construction accuracy. The lower bottom plate reinforcement and the outer web reinforcement can be tied at the same time, and then the upper bottom plate reinforcement and the inner web reinforcement can be tied at the same time, thereby changing the construction sequence and reducing the construction steps. By arranging the first component 3 and the vertical rod 4 to be detachably connected, the bottom plate reinforcement frame 1 can be quickly assembled during construction to support the bottom plate reinforcement. The fixed spacing formed by the connection of the first component 3 and the vertical rod 4 replaces the manual adjustment of the reinforcement spacing, thereby improving the construction progress and facilitating disassembly after the tying is completed. By arranging the third component 5, the second component 6 and the cross bar 7, the web reinforcement frame 2 can be quickly assembled during construction, so that the second component 6 supports multiple groups of web reinforcements. The fixed spacing formed makes the position of each web reinforcement accurate, thereby replacing the manual adjustment of the reinforcement spacing, improving construction accuracy, and facilitating disassembly after the tying is completed.

[0054] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A method for installing a cast-in-situ box girder bottom web reinforcement installation component, characterized by: The installation steps include: S1, assembling the bottom plate reinforcement frame (1), assembling two groups of first components (3) on the bottom plate through vertical rods (4) and positioning pins (8) to form the bottom plate reinforcement frame (1), inserting the two ends of the two groups of vertical rods (4) into the first installation grooves (31) of the two groups of first components (3), and inserting the four groups of positioning pins (8) into the corresponding vertical rod positioning holes (41) and the first limiting holes (32), respectively, and fixing the first components (3) and the vertical rods (4) to form the bottom plate reinforcement frame (1); S2, assembling the web reinforcement frame (2), assembling a plurality of groups of second components (6) and two groups of third components (5) into the web reinforcement frame (2) through the crossbar (7) and the positioning pin (8), connecting and assembling the plurality of groups of second components (6) in sequence through the second slots (61) and the second plug-in blocks (62), inserting the second plug-in blocks (62) of the bottom second component (6) into the third installation slot (51) of the third component (5), and connecting and assembling the two groups of third components (5) through the corresponding third slots (52) and the third plug-in blocks (53); S3, assembling the components as a whole, assembling the bottom plate reinforcement frame (1) and the web reinforcement frame (2) into a whole, and connecting and assembling the third slot (52) of a set of third components (5) with the first plug (34) of the first component (3); S4, tying preparation, placing the two groups of components as a whole on both ends of the steel bars, placing the bottom plate steel bars on the first grooves (35) of the upper and lower groups of first components (3), and placing the web steel bars on the second grooves (64) of the inner and outer second components (6); S5. Tie the steel bars. First tie the lower bottom plate steel bars and the outer web steel bars at the same time, then tie the upper bottom plate steel bars and the inner web steel bars at the same time.

2. A cast-in-situ box girder bottom web reinforcement mounting member, installed using the mounting method according to claim 1, characterized in that: The invention comprises a bottom plate reinforcement frame (1) and a web reinforcement frame (2), wherein the bottom plate reinforcement frame (1) comprises a plurality of groups of first members (3) arranged in parallel from top to bottom, wherein the first members (3) are mutually detachably connected via vertical rods (4), and the web reinforcement frame (2) comprises a third member (5) and a plurality of groups of second members (6), wherein the plurality of groups of second members (6) are sequentially detachably connected from top to bottom, wherein the second member (6) at the bottom is detachably connected to the third member (5), wherein one end of the third member (5) is detachably connected to one end of the first member (3) at the bottom, and the other end is detachably connected to one end of the third member (5) of another group, and the second members (6) of the two groups of web reinforcement frames (2) are mutually detachably connected via horizontal rods (7); The top of the first component (3) is symmetrically provided with two groups of first mounting grooves (31) extending downwardly therethrough, and the front side wall is provided with two groups of first limiting holes (32), the first limiting holes (32) are respectively communicated with the first mounting grooves (31), and the end surfaces at both ends are respectively provided with first slots (33) and first inserts (34); A plurality of groups of vertical rod positioning holes (41) are evenly provided on the vertical rod (4), and both ends of the vertical rod (4) are respectively provided in the first mounting grooves (31) of the upper and lower groups of first components (3). One group of vertical rod positioning holes (41) is aligned with the first limiting hole (32), and positioning pins (8) are provided in the group of vertical rod positioning holes (41) and the first limiting hole (32).

3. The cast-in-situ box girder bottom web reinforcement installation component according to claim 2, characterized in that: A first groove (35) opening upward is provided at the center of the top of the first component (3), and the first groove (35) is arranged between the two groups of first mounting grooves (31).

4. The cast-in-situ box girder bottom web reinforcement installation component according to claim 3, characterized in that: A third mounting groove (51) is provided on the top of the third component (5), and a third slot (52) and a third insert block (53) are provided at both ends. The third insert block (53) of one group of third components (5) is arranged in the third slot (52) of another group of third components (5). The first insert block (34) of the bottommost first component (3) is provided in the third slot (52) of one group of third components (5).

5. The cast-in-situ box girder bottom web reinforcement installation component according to claim 4, characterized in that: The second component (6) is provided with a second slot (61) at the top, and a second plug (62) matched with the second slot (61) at the bottom. Two groups of second mounting slots (63) symmetrically arranged in the upper and lower sides are provided on the left and right side walls. A second groove (64) is provided in the middle of the right side wall. Two groups of second limiting holes (65) are provided on the front side wall. The second limiting holes (65) are respectively connected to the second mounting slots (63). The second groove (64) is arranged between the two groups of second mounting slots (63) and opens to the right. The second plug (62) of the upper second component (6) is arranged in the second slot (61) of the lower second component (6), and the second plug (62) of the bottom second component (6) is arranged in the third mounting slot (51).

6. The cast-in-situ box girder bottom web reinforcement installation component according to claim 5, characterized in that: A crossbar positioning hole (71) is provided on the crossbar (7), and both ends of the crossbar (7) respectively pass through the second mounting slots (63) of the two horizontal groups of second components (6). The crossbar positioning hole (71) is aligned with the second limiting hole (65), and positioning pins (8) are provided in the crossbar positioning hole (71) and the second limiting hole (65).

7. The cast-in-situ box girder bottom web reinforcement installation component according to claim 6, characterized in that: The top inner wall of the opening of the second groove (64) is a horizontal inner wall, and the bottom inner wall of the opening is an arc-shaped inner wall.

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