CN114855643A

CN114855643A - Method for assembling prefabricated cantilever of corrugated steel web plate combined box girder

Info

Publication number: CN114855643A
Application number: CN202210650231.1A
Authority: CN
Inventors: 李志�; 高晓飞; 吴强; 王浩; 王科鑫
Original assignee: Henan Zhongqiao Heavy Industry Technology Co ltd
Current assignee: Henan Zhongqiao Heavy Industry Technology Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-08-05

Abstract

The invention provides a method for assembling a prefabricated cantilever of a corrugated steel web combined box girder. The prefabricated cantilever of corrugated steel web combination box girder comprises a combination box, the combination box comprises a bottom plate, two corrugated side plates and two crossbands, two crossbands and bottom plate are located on two corrugated side plates respectively and are connected with each other through connecting components, two fixing strips of a plurality of vertical settings of fixedly connected with are arranged on the lateral wall of one side of each corrugated side plate back to back, two connecting plates are arranged between the crossbands, two cantilevers of a plurality of arrangement settings are arranged on the lateral wall of one side of each crossband back to back, the cantilevers comprise a top plate, a second slot, a second fixing bolt, a vertical plate, an L-shaped plate, a stand column, a third fixing bolt, a fourth fixing bolt, a groove, a convex block and a locking bolt, and the second slot is formed in the lateral wall of each crossband is provided with the second slot. The method for splicing the corrugated steel web combined box girder precast cantilever provided by the invention has the advantages of convenience and quickness in transportation and splicing.

Description

Method for assembling prefabricated cantilever of corrugated steel web combined box girder

Technical Field

The invention relates to the field of building construction, in particular to a method for assembling a prefabricated cantilever of a corrugated steel web combined box girder.

Background

The building construction refers to production activities in the engineering construction implementation stage, is the construction process of various buildings, and also can be a process of changing various lines on a design drawing into a real object at a specified place. The method comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like. In the construction process of various buildings, different structures and construction modes can be adopted for actual operation according to the requirements of the buildings. One kind of bridge engineering center sill, the inside is hollow, and there is the flange on upper portion both sides, similar case, therefore gets the name. Single boxes, multiple boxes, etc. The box girder is applied to the structure of bridge more, for making things convenient for the manufacturing and the transportation of box girder, can adopt to make different box girder part subassemblies and assemble at the job site usually, and corrugated steel web combination box girder is comparatively common modular box girder.

Corrugated steel web combination box girder side can adopt prefabricated cantilever to assemble, and the cantilever also can adopt split type to assemble to accomplish after again with the box girder be connected fixedly, but most cantilever component parts are more, need assemble in advance to accomplish after again be connected fixedly with it and box girder, and its whole weight is heavier, has increaseed the operation degree of difficulty.

Therefore, a new method for assembling the precast cantilever of the corrugated steel web composite box girder is needed to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides a method for assembling a prefabricated cantilever of a corrugated steel web combined box girder, which is convenient and quick to transport and assemble.

The invention provides a prefabricated cantilever of a corrugated steel web plate combined box girder, which comprises: the combined box comprises a bottom plate, two corrugated side plates and two cross bars, wherein the two cross bars and the bottom plate are respectively positioned at the upper side and the lower side of the two corrugated side plates and are fixedly connected with the two corrugated side plates through connecting components, a plurality of vertically arranged fixing bars are fixedly arranged on the side walls of the two corrugated side plates which are opposite to each other, a plurality of connecting plates are arranged between the two cross bars, a plurality of cantilevers which are arranged on the side walls of the two cross bars which are opposite to each other, each cantilever comprises a top plate, a second slot, a second fixing bolt, a vertical plate, an L-shaped plate, a stand column, a third fixing bolt, a fourth fixing bolt, a groove, a convex block and a locking bolt, the second slot is formed in the side wall of each cross bar, one end of the top plate is inserted into the second slot and fixed through the second fixing bolt, the vertical fixing plate is fixedly arranged at the bottom of the top plate and is close to the corrugated side plates, and a groove is formed in the side wall of each fixing bar, and the convex block fixedly connected with the vertical plate is inserted in the groove, the convex block is fixedly connected with the fixing strip through the locking bolt, the L-shaped plate is installed at the bottom of the vertical plate, a plurality of stand columns are fixedly installed in the L-shaped plate and arranged, the tops of the stand columns are all attached to the bottom of the top plate, one end of the L-shaped plate and the tops of the stand columns are fixedly connected with the top plate through the third fixing bolt, and the other end of the L-shaped plate is fixedly connected with the bottom of the vertical plate through the fourth fixing bolt.

Preferably, the connecting plate includes the picture peg, first fixed plate, the second fixed plate, connecting bolt, the nut, first slot and first fixing bolt, first slot has all been seted up on the relative lateral wall of one side of two crossbands, and all insert in two relative first slots and be equipped with a picture peg, the picture peg passes through first fixing bolt and corresponding crossbands fixed connection, first fixed plate and second fixed plate are installed respectively to both sides lateral wall about two picture pegs, two sets of first fixing bolt run through first fixed plate in proper order, picture peg and second fixed plate are connected fixedly through two picture pegs of nut.

Preferably, coupling assembling includes fixed block, third slot, inserted block and fifth fixing bolt, and equal fixed mounting has the fixed block of arranging the setting on the upside lateral wall of bottom plate and the downside lateral wall of two crossbands, and the third slot has all been seted up to the one end that a plurality of fixed blocks are close to the ripple curb plate, and inserts the inserted block that is equipped with and fixes a strip fixed connection in the third slot, and the inserted block passes through fifth fixing bolt and fixed block fixed connection.

Preferably, the fixing strip is located at a concave position of the outer side wall of the corrugated side plate, and the head of the fifth fixing bolt does not exceed the edge of the bottom plate.

Preferably, the side wall of riser still sets up with the laminating of ripple curb plate lateral wall.

Preferably, the end part of the lug, which is far away from the vertical plate, is abutted to the inner wall of the groove, and the length of the lug is greater than the depth of the groove.

Preferably, the L template is vertical setting with the one end of roof junction, and the other end slope of L template and be thirty degrees to fifty degrees contained angle settings between the roof.

Preferably, the distance between two opposite insertion plates is larger than the depth of the insertion plate inserted into the first slot.

The assembling method of the corrugated steel web plate combined box girder precast cantilever comprises the following specific installation steps:

a. the bottom plate is suspended at a designated position and fixed through hoisting equipment, the two corrugated side plates are fixedly connected with the bottom plate through connecting components, the two cross bars are respectively installed at the upper ends of the two corrugated side plates and fixedly connected through the connecting components, and a plurality of connecting plates are installed between the two cross bars and are fixed with the connecting plates, so that the installation of the combination box is completed;

b. installing the cantilever, inserting one end of the top plate close to the vertical plate into a second slot on the side wall of the cross bar, inserting a convex block on the vertical plate into a groove on the fixing strip, inserting the end part of the top plate inserted into the second slot through a second fixing bolt to be connected and fixed with the cross bar, fixing the convex block in the groove through a locking bolt, connecting and fixing the vertical plate and the fixing strip, installing the L-shaped plate at the bottoms of the top plate and the vertical plate to form an irregular circular plate, enabling the top of the vertical plate to be abutted against the bottom of the top plate, connecting and fixing the end part of the L-shaped plate and the top of the vertical plate with the top plate through a third fixing bolt, and connecting and fixing the other end of the L-shaped plate with the bottom of the vertical plate through a fourth fixing bolt, so that the installation of the cantilever can be completed;

c. pouring and performing other procedures on the inner cavity of the combined box.

Compared with the prior art, the method for splicing the prefabricated cantilever of the corrugated steel web combined box girder has the following beneficial effects:

1. the combined box comprises a bottom plate, two corrugated side plates, two cross bars and a plurality of connecting plates, and is convenient to transport and mount, wherein the corrugated side plates, the bottom plate and the cross bars are connected through bolts from the side faces of the corrugated side plates, the assembly is convenient and rapid, the cantilever comprises two parts, namely a top plate, a vertical plate and an L-shaped plate, and an upright post, the vertical plate and the fixing bars are connected and fixed through rotating locking bolts by using tools from the side faces, the operation is convenient, and the joints of parts in the combined box and the cantilever are in an open environment, so that the assembly is convenient;

2. the connecting plate consists of two inserting plates, a first fixing plate and a second fixing plate, and is also connected in an assembling mode, and the first fixing plate, the second fixing plate and the two inserting plates are connected and fixed through connecting bolts and nuts, so that the assembly of the connecting plate and the connection and fixation between the connecting plate and the two transverse strips are completed, and the integral stability of the box girder is improved;

3. the bottom of the L-shaped plate is inclined and forms an included angle of thirty-fifty degrees with the top plate, so that the cantilever integrally forms an irregular return plate, the area of the part of the cantilever close to the combined box is larger, and the installation stability of the cantilever is improved.

Drawings

FIG. 1 is a schematic structural diagram of a prefabricated cantilever of a corrugated steel web composite box girder according to a preferred embodiment of the invention;

FIG. 2 is a schematic view of an exploded structure of the combination box of the present invention;

FIG. 3 is a schematic exploded view of the cross-bar of the present invention;

FIG. 4 is an exploded view of the connecting plate of the present invention;

FIG. 5 is a schematic view of the corrugated side plate according to the present invention;

FIG. 6 is a schematic structural view of a base plate according to the present invention;

FIG. 7 is a schematic view of the cantilever structure of the present invention;

fig. 8 is a schematic diagram of an exploded structure of the cantilever according to the present invention.

Reference numbers in the figures: 1. a combination box; 11. a base plate; 12. a corrugated side plate; 121. a fixing strip; 13. a horizontal bar; 14. a connecting plate; 141. inserting plates; 142. a first fixing plate; 143. a second fixing plate; 144. a connecting bolt; 145. a nut; 146. a first slot; 147. a first fixing bolt; 2. a cantilever; 21. a top plate; 211. a second slot; 212. a second fixing bolt; 22. a vertical plate; 23. an L-shaped plate; 24. a column; 25. a third fixing bolt; 26. a fourth fixing bolt; 27. a groove; 28. a bump; 29. locking the bolt; 3. a connecting assembly; 31. a fixed block; 32. a third slot; 33. inserting a block; 34. and a fifth fixing bolt.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1 to 8, fig. 1 is a schematic structural view of a prefabricated cantilever of a corrugated steel web composite box girder according to a preferred embodiment of the present invention; FIG. 2 is a schematic view of an exploded structure of the combination box of the present invention; FIG. 3 is a schematic exploded view of the cross-bar of the present invention; FIG. 4 is an exploded view of the connecting plate of the present invention; FIG. 5 is a schematic view of the corrugated side plate according to the present invention; FIG. 6 is a schematic structural view of a base plate according to the present invention; FIG. 7 is a schematic view of the cantilever structure of the present invention; fig. 8 is a schematic diagram of an exploded structure of the cantilever according to the present invention. The method comprises the following steps: a combination box 1, a cantilever 2 and a connecting component 3.

In the specific implementation process, as shown in fig. 1 to 8, a combination box 1, the combination box 1 includes a bottom plate 11, two corrugated side plates 12 and two cross bars 13, the two cross bars 13 and the bottom plate 11 are respectively located at upper and lower sides of the two corrugated side plates 12 and are both fixedly connected thereto through a connection assembly 3, a plurality of vertically arranged fixing bars 121 are both arranged and fixedly connected to a side wall of the two corrugated side plates 12 opposite to each other, a plurality of connection plates 14 are installed between the two cross bars 13, a plurality of arranged cantilevers 2 are both installed at a side wall of the two cross bars 13 opposite to each other, each cantilever 2 includes a top plate 21, a second slot 211, a second fixing bolt 212, a vertical plate 22, an L-shaped plate 23, a column 24, a third fixing bolt 25, a fourth fixing bolt 26, a groove 27, a bump 28 and a locking bolt 29, a second slot 211 is opened on a side wall of the cross bar 13, and one end of the top plate 21 is inserted into the second slot 211 and fixed by the second fixing bolt 212, vertical fixed mounting of riser 22 is in roof 21 bottom and near ripple curb plate 12 setting, seted up recess 27 on the lateral wall of fixed strip 121, and the lug 28 with riser 22 fixed connection is inserted in recess 27, lug 28 passes through locking bolt 29 fixed and fixed strip 121 fixed connection, L template 23 is installed in riser 22 bottom, and fixed mounting has a plurality of stands 24 of arranging the setting in L template 23, a plurality of stands 24 tops all laminate the setting with roof 21 bottom, the one end of L template 23 and the top of a plurality of stands 24 are all through third fixing bolt 25 and roof 21 fixed connection, and the other end of L template 23 passes through fourth fixing bolt 26 and riser 22 bottom fixed connection.

It should be noted that: the combined box 1 is composed of a bottom plate 11, two corrugated side plates 12, two cross bars 13 and a plurality of connecting plates 14, and is convenient to transport and install, wherein the connection among the corrugated side plates 12, the bottom plate 11 and the cross bars 13 is all fixed by bolts from the side surface, the assembly is convenient and fast, the cantilever 2 is installed on the outer side of the cross bars 13, the cantilever 2 is composed of a top plate 21, a vertical plate 22, an L-shaped plate 23 and a stand column 24 and is mainly divided into two parts, one part is composed of the top plate 21 to form the vertical plate 22, the other part is composed of the L-shaped plate 23 and the stand column 24, when the top plate 21 is installed, one end of the top plate 21 close to the vertical plate 22 is inserted into a second slot 211 on the side wall of the cross bars 13, meanwhile, a lug 28 on the vertical plate 22 is inserted into a groove 27 on a fixing strip 121, the end part of the top plate 21 inserted into the second slot 211 through a second fixing bolt 212 is connected and fixed with the cross bars 13, the lug 28 is fixed in the groove 27 by using a tool locking bolt 29 from the side surface, connect riser 22 and fixed strip 121 fixedly, convenient operation, with L template 23 fixed mounting in the bottom of roof 21 and riser 22, each partial part junction in combination box 1 and cantilever 2 all is in under the open environment, makes things convenient for it to assemble, the connection of each partial part all with the through-hole of seting up corresponding bolt.

Referring to fig. 3 and 4, the connecting plate 14 includes an insert plate 141, a first fixing plate 142, a second fixing plate 143, a connecting bolt 144, a nut 145, a first slot 146, and a first fixing bolt 147, the first slot 146 is opened on the side wall of one side opposite to the two transverse bars 13, an insert plate 141 is inserted in each of the two opposite first slots 146, the insert plate 141 is fixedly connected to the corresponding transverse bar 13 through the first fixing bolt 147, the first fixing plate 142 and the second fixing plate 143 are respectively installed on the side walls of the upper and lower sides of the two insert plates 141, and the two sets of first fixing bolts 147 sequentially penetrate through the first fixing plate 142, the insert plate 141, and the second fixing plate 143 and are connected and fixed to each other through the two insert plates 141 through the nut 145.

It should be noted that: when the connecting plate 14 is used to connect two cross bars 13, the inserting plates 141 are inserted into the corresponding first slots 146 and fixed by the first fixing bolts 147, so that the inserting plates 141 are connected and fixed with the cross bars 13, the corresponding first fixing plates 142 and second fixing plates 143 are respectively placed at the ends of the two inserting plates 141 close to each other, and the first fixing plates 142 and second fixing plates 143 and the two inserting plates 141 are connected and fixed by the connecting bolts 144 and nuts 145, thereby completing the assembly of the connecting plate 14 and the connection and fixation between the two cross bars 13.

Referring to fig. 3, 5 and 6, the connecting assembly 3 includes a fixing block 31, a third slot 32, an insert block 33 and a fifth fixing bolt 34, the fixing blocks 31 arranged are all fixedly mounted on the upper side wall of the bottom plate 11 and the lower side walls of the two cross bars 13, the third slot 32 is all opened at one end of each of the fixing blocks 31 close to the corrugated side plate 12, the insert block 33 fixedly connected with the fixing bar 121 is inserted in the third slot 32, and the insert block 33 is fixedly connected with the fixing block 31 through the fifth fixing bolt 34.

It should be noted that: when assembling the combination box 1, firstly, the bottom plate 11 is suspended at a designated position and fixed by a hoisting device, the two corrugated side plates 12 are connected with the bottom plate 11, the insertion block 33 at the bottom of the fixing strip 121 is inserted into the third slot 32 of the fixing block 31 on the bottom plate 11, and the lower insertion block 33 is connected and fixed with the lower fixing block 31 by the fifth fixing bolt 34, so that the two corrugated side plates 12 are connected and fixed with the bottom plate 11, the cross bar 13 is installed at the upper end of the corrugated side plate 12, correspondingly, the insertion block 33 above the fixing strip 121 is inserted into the third slot 32 on the cross bar 13, the upper insertion block 33 is also connected and fixed with the upper fixing block 31 by the fifth fixing bolt 34, the cross bar 13 is fixed above the corrugated side plate 12, and the two cross bars 13 are connected and fixed by the connecting plate 14, that is, the installation of the combination box 1 is completed.

The fixing strip 121 is located at a concave position of the outer side wall of the corrugated side plate 12, and the head of the fifth fixing bolt 34 is arranged not to exceed the edge of the bottom plate 11; so that the fixing bar 121 and the fifth fixing bolt 34 do not protrude to affect the installation of the cantilever 2.

Wherein, the side wall of the vertical plate 22 is also attached to the side wall of the corrugated side plate 12; the vertical plates 22 are supported, so that the contact area between the cantilever 2 and the combined box 1 is increased, and the support stability of the cantilever is improved.

Wherein, the end of the bump 28 far away from the riser 22 is arranged against the inner wall of the groove 27, and the length of the bump 28 is greater than the depth of the groove 27; because the existence of fixed block 31 and fifth fixing bolt 34, riser 22 can not produce the contact with gib 121, and lug 28 tip must support riser 22 with the offseting with the recess 27 inner wall, and lug 28 also needs sufficient length can guarantee to offseting with the recess 27 inner wall.

One end of the joint of the L-shaped plate 23 and the top plate 21 is vertically arranged, and the other end of the L-shaped plate 23 is inclined and forms an included angle of thirty-fifty degrees with the top plate 21; the cantilever 2 is integrally formed into an irregular and convoluted plate, the area of the part of the irregular and convoluted plate close to the combined box 1 is larger, and the installation stability of the cantilever 2 is improved.

The distance between the two opposite insertion plates 141 is greater than the depth of the insertion plate 141 inserted into the first slot 146; when the distance between the two insertion plates 141 is small, one of the insertion plates 141 is inserted into the corresponding first slot 146, and the length of the corresponding other insertion plate 141 is greater than the distance between the end of the already-installed insertion plate 141 and the far transverse bar 13, so that the installation is impossible, and the distance between the two insertion plates 141 needs to be increased to ensure the normal installation of the connecting plate 14.

The assembling method of the prefabricated cantilever of the corrugated steel web plate combined box girder comprises the following specific installation steps:

a. the bottom plate 11 is suspended and fixed at a designated position by a hoisting device, the two corrugated side plates 12 are connected with the bottom plate 11, the insert block 33 positioned at the bottom of the fixing strip 121 is inserted into the third slot 32 of the fixing block 31 on the bottom plate 11, the lower insert block 33 is connected and fixed with the lower fixing block 31 by the fifth fixing bolt 34, so that the two corrugated side plates 12 are connected and fixed with the bottom plate 11, the cross bar 13 is installed at the upper end of the corrugated side plate 12, correspondingly, the insert block 33 positioned above the fixing strip 121 is inserted into the third slot 32 positioned on the cross bar 13, the upper insert block 33 is also connected and fixed with the upper fixing block 31 by the fifth fixing bolt 34, the cross bar 13 is fixed above the corrugated side plate 12, when the two cross bars 13 are connected by the connecting plate 14, the insert blocks 141 into the corresponding first slots 146 and fix them by the first fixing bolts 147, the inserting plates 141 and the cross bars 13 are connected and fixed, corresponding first fixing plates 142 and second fixing plates 143 are respectively placed at the end parts of the two inserting plates 141 close to each other, and the first fixing plates 142 and the second fixing plates 143 as well as the two inserting plates 141 are connected and fixed through connecting bolts 144 and nuts 145, so that the assembly of the connecting plates 14 and the connection and fixation between the connecting plates and the two cross bars 13 are completed, namely the installation of the combined box 1 is completed;

b. installing the cantilever 2, inserting one end of the top plate 21 close to the vertical plate 22 into a second slot 211 on the side wall of the cross bar 13, inserting a projection 28 on the vertical plate 22 into a groove 27 on the fixing bar 121, inserting the end of the top plate 21 into the second slot 211 through a second fixing bolt 212 to be connected and fixed with the cross bar 13, fixing the projection 28 in the groove 27 through a locking bolt 29, connecting and fixing the vertical plate 22 with the fixing bar 121, installing the L-shaped plate 23 at the bottom of the top plate 21 and the vertical plate 22 to form an irregular circular plate, abutting the top of the upright column 24 against the bottom of the top plate 21, connecting and fixing the end of the L-shaped plate 23 and the top of the upright column 24 with the top plate 21 through a third fixing bolt 25, and connecting and fixing the other end of the L-shaped plate 23 with the bottom of the vertical plate 22 through a fourth fixing bolt 26, thereby completing the installation of the cantilever 2;

c. pouring and performing other procedures on the inner cavity of the combined box 1.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a prefabricated cantilever of corrugated steel web combination box girder which characterized in that includes:

combination box (1), combination box (1) includes a bottom plate (11), two ripple curb plate (12) and two crossbands (13), two crossbands (13) and bottom plate (11) are located both sides about two ripple curb plate (12) respectively and all pass through coupling assembling (3) rather than fixed connection, two all arrange fixed strip (121) of a plurality of vertical settings of fixedly connected with on ripple curb plate (12) one side lateral wall that backs on the back, two install a plurality of connecting plates (14) between crossband (13), two cantilever (2) that a plurality of ranges set up are all installed in one side lateral wall department that crossbands (13) back on the back, cantilever (2) include roof (21), second slot (211), second fixing bolt (212), riser (22), L template (23), stand (24), third fixing bolt (25), fourth fixing bolt (26), The corrugated plate fixing device comprises a groove (27), a convex block (28) and a locking bolt (29), wherein a second slot (211) is formed in the side wall of a transverse strip (13), one end of a top plate (21) is inserted into the second slot (211) and fixed through a second fixing bolt (212), a vertical plate (22) is vertically and fixedly arranged at the bottom of the top plate (21) and close to a corrugated side plate (12), a groove (27) is formed in the side wall of a fixing strip (121), the convex block (28) fixedly connected with the vertical plate (22) is inserted into the groove (27), the convex block (28) is fixedly connected with a fixing strip (121) through the locking bolt (29), an L-shaped plate (23) is arranged at the bottom of the vertical plate (22), a plurality of stand columns (24) are fixedly arranged in the L-shaped plate (23), and the tops of the stand columns (24) are all arranged with the bottom of the top plate (21) in a fitting manner, one end of the L-shaped plate (23) and the tops of the multiple upright columns (24) are fixedly connected with the top plate (21) through third fixing bolts (25), and the other end of the L-shaped plate (23) is fixedly connected with the bottom of the vertical plate (22) through fourth fixing bolts (26).

2. The precast cantilever of a corrugated steel web combination box beam according to claim 1, the connecting plate (14) comprises an inserting plate (141), a first fixing plate (142), a second fixing plate (143), a connecting bolt (144), a nut (145), a first slot (146) and a first fixing bolt (147), the side walls of two opposite sides of the transverse strips (13) are respectively provided with the first slot (146), and an inserting plate (141) is inserted into each of the two opposite first inserting grooves (146), the inserting plate (141) is fixedly connected with the corresponding transverse bar (13) through a first fixing bolt (147), a first fixing plate (142) and a second fixing plate (143) are respectively installed on the side walls of the upper side and the lower side of the inserting plate (141), and the first fixing bolt (147) penetrates through the first fixing plate (142), the inserting plate (141) and the second fixing plate (143) in sequence and is fixedly connected with the two inserting plates (141) through a nut (145).

3. The precast cantilever of corrugated steel web combined box girder according to claim 1, wherein the connection assembly (3) comprises fixing blocks (31), third slots (32), insertion blocks (33) and fifth fixing bolts (34), the fixing blocks (31) are fixedly arranged on the upper side wall of the bottom plate (11) and the lower side walls of the two cross bars (13), the third slots (32) are formed in one ends, close to the corrugated side plates (12), of the fixing blocks (31), the insertion blocks (33) fixedly connected with the fixing bars (121) are inserted in the third slots (32), and the insertion blocks (33) are fixedly connected with the fixing blocks (31) through the fifth fixing bolts (34).

4. The precast cantilever of corrugated steel web combination box beam according to claim 3, wherein the fixing strip (121) is located at the recess of the outer side wall of the corrugated side plate (12), and the head of the fifth fixing bolt (34) is not arranged beyond the edge of the bottom plate (11).

5. The precast cantilever of a corrugated steel web combination box girder according to claim 1, wherein the side walls of the risers (22) are also disposed in abutment with the side walls of the corrugated side plates (12).

6. The precast cantilever of a corrugated steel web combination box girder according to claim 1, wherein the end of the projection (28) away from the riser (22) is disposed against the inner wall of the groove (27), and the length of the projection (28) is greater than the depth of the groove (27).

7. The precast cantilever of a corrugated steel web combination box girder according to claim 1, wherein one end of the joint of the L-shaped plate (23) and the top plate (21) is vertically arranged, and the other end of the L-shaped plate (23) is inclined and forms an included angle of thirty-fifty degrees with the top plate (21).

8. The precast cantilever of a corrugated steel web composite box girder according to claim 1, wherein the distance between two opposite insert plates (141) is greater than the depth of the insert plate (141) inserted into the first slot (146).

9. The precast cantilever assembling method of the corrugated steel web combination box girder according to any one of claims 1 to 8, is characterized by comprising the following specific installation steps:

a. firstly, a bottom plate (11) is suspended at a designated position and fixed through hoisting equipment, then two corrugated side plates (12) are fixedly connected with the bottom plate (11) through a connecting assembly (3), two cross bars (13) are respectively installed at the upper ends of the two corrugated side plates (12) and are fixedly connected with the two corrugated side plates through the connecting assembly (3), a plurality of connecting plates (14) are installed between the two cross bars (13) and are fixed with the connecting plates, and therefore the installation of the combined box (1) is completed;

b. installing the cantilever (2), inserting one end of the top plate (21) close to the vertical plate (22) into a second slot (211) on the side wall of the cross bar (13), simultaneously inserting a convex block (28) on the vertical plate (22) into a groove (27) on the fixing bar (121), inserting the end part of the top plate (21) into the second slot (211) through a second fixing bolt (212) to be connected and fixed with the cross bar (13), fixing the convex block (28) into the groove (27) through a locking bolt (29), connecting and fixing the vertical plate (22) with the fixing bar (121), installing an L-shaped plate (23) at the bottoms of the top plate (21) and the vertical plate (22) to form an irregular circle-shaped plate, enabling the top of the upright column (24) to be abutted against the bottom of the top plate (21), and connecting and fixing the end part of the L-shaped plate (23) and the top of the upright column (24) with the top plate (21) through a third fixing bolt (25), the other end of the L-shaped plate (23) is connected and fixed with the bottom of the vertical plate (22) through a fourth fixing bolt (26), and then the cantilever (2) can be installed;

c. pouring and performing other procedures on the inner cavity of the combined box (1).