CN111996914A - Method for quickly assembling multi-section cantilever of prefabricated box girder - Google Patents
Method for quickly assembling multi-section cantilever of prefabricated box girder Download PDFInfo
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- CN111996914A CN111996914A CN202010705656.9A CN202010705656A CN111996914A CN 111996914 A CN111996914 A CN 111996914A CN 202010705656 A CN202010705656 A CN 202010705656A CN 111996914 A CN111996914 A CN 111996914A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a method for quickly assembling a multi-section cantilever of a prefabricated box girder, which comprises the following steps of: s1, gluing the spliced end faces of the spliced section box girders; s2, hoisting the section box girders adjacent to the spliced section box girders, tensioning temporary prestress to compress extrusion glue, and circularly finishing glue smearing and temporary prestress tensioning between splicing end faces of a plurality of pairs of section box girders; s3, penetrating through the prestressed steel bundles at the beam ends of the segmental box beams; and S4, performing prestress tensioning after the glue strength of the splicing surfaces of the pair of segment box girders finally glued meets the requirement. According to the invention, a plurality of pairs of prefabricated box girder segments are assembled by one cantilever, and the arrangement of prestressed steel bundles is optimized, so that the cantilever of the prefabricated box girder is rapidly assembled, and the problems of various processes and low efficiency in the prior art are solved.
Description
Technical Field
The invention relates to the field of a prefabricated box girder assembling method. More particularly, the invention relates to a method for quickly assembling a multi-section cantilever of a prefabricated box girder.
Background
The section assembling process of the prefabricated box girder is to divide the upper part structure of the bridge into a plurality of standard sections, after the matched prefabrication in a prefabricating field is finished, the upper part structure of the bridge is assembled on the lower part structure of the bridge by special assembling equipment such as a bridge erecting machine and the like in sequence one by one, and prestress is applied to the lower part structure of the bridge to form an integral structure, and the integral structure is pushed one by one and assembled one by one along a preset installation direction. Compared with the traditional vertical mold cast-in-place manufacturing process, the precast box girder stage assembling process has the remarkable advantages of less precast land, high control precision, small influence on traffic under a bridge and the like.
In the existing precast box girder cantilever assembling method, the following procedures need to be completed every time one segmental box girder is assembled: smearing glue on the spliced surface, compressing and extruding glue by using temporary prestress of adjacent sections, penetrating prestressed steel bundles, and stretching prestress after the glue strength reaches the standard. The assembly of 2 beams (1 pair of prefabricated box beams) is relatively long in time according to the procedure, and with the development of science and technology and economy, the segmental cantilever assembly process is difficult to meet the increasingly improved social requirements in the aspects of construction efficiency, energy conservation, environmental protection and the like, and the requirement on a more efficient prefabricated box beam assembly method is increasingly urgent.
Disclosure of Invention
The invention aims to provide a method for quickly assembling a multi-section cantilever of a prefabricated box girder, so as to improve the assembling efficiency of the cantilever of the prefabricated box girder and solve the problems of multiple working procedures and low efficiency in the prior art.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a multi-segment cantilever rapid assembling method of precast box girders, comprising the steps of:
s1, gluing the spliced end faces of the spliced section box girders;
s2, hoisting the section box girders to be spliced adjacent to the spliced section box girders, tensioning the temporary prestress to compress and extrude colloid, and circularly finishing the glue smearing and temporary prestress tensioning between the splicing end faces of the plurality of pairs of section box girders;
s3, penetrating through the prestressed steel bundles of the segment box girder to be assembled;
s4, after the glue strength of the splicing surfaces of the pair of section box girders to be spliced, which are finally glued, meets the requirement, prestress tensioning is carried out to complete the splicing of the plurality of sections of the section box girders;
and S5, repeating the steps S1 to S4 until the assembly of all the section box girders is completed.
Preferably, in step S2, the number of the once assembled section box girders is 3 to 6.
Preferably, in step S4, the prestress is anchored to the most cantilevered end of the plurality of pairs of section box girders or to the roof block.
Preferably, in step S3, the prestressed steel beams on the sectional box girders to be assembled include straight beams and bent-down beams, which are anchored to the most cantilevered ends of the sectional box girders of the plurality of pairs after approaching the web position.
Preferably, during the assembling process, the dead weight of the section box girder to be assembled without tensioning prestress is borne by the bridge girder erection machine.
Preferably, the prestress tension is one-time tension enough to bear the prestress of a plurality of pairs of section box girders.
Preferably, 6 monitoring points are uniformly distributed on each section box girder to be assembled in a transverse and longitudinal staggered mode.
Preferably, the section box girder to be assembled is provided with a pore passage for penetrating the prestressed steel bundles, the pore passage is formed by a pore passage forming mechanism, and the pore passage forming mechanism comprises:
the connecting pipe is positioned in the section box girder to be assembled and forms a central main body of the pore channel;
the connecting piece is provided with a central through hole communicated with the connecting pipe, namely the pore passage, the connecting piece is superposed with the central axis of the connecting pipe, the inner end part of the connecting piece, which is close to the connecting pipe, is provided with an inward-concave annular groove, the end part of the connecting pipe is just matched in the annular groove, the outer end part of the connecting piece, which is far away from the connecting pipe, is also provided with an inward-concave annular clamping groove, the opening of the annular clamping groove is gradually reduced from the notch to the bottom of the groove, and a plurality of threaded holes which are continuously concave towards the inside of the connecting piece are uniformly arranged at intervals in a circle at the bottom of the;
the sealing ring is arranged to be just sealed at the outer end part of the connecting pipe, the sealing ring is provided with a plurality of holes which are matched with the threaded holes one by one, and a plurality of bolts are matched one by one and are sequentially connected with the threaded holes of the connecting piece, the sealing ring and the template;
the sealing element is of an annular structure with uniform middle thickness and gradually reduced towards two sides, and the gradually reduced parts on the two sides of the sealing element are respectively in sealing fit with annular clamping grooves of the connecting pieces of the two section box girders to be assembled.
Preferably, the sealing element is made of rubber materials, and the center of the sealing element is provided with an annular thin steel sheet framework.
Preferably, the sealing element is divided into two parts in the middle part with uniform thickness, so that the sealing element is assembled by two parts, and the two parts of the sealing element are assembled by respectively arranging a flange and a groove in a matched mode.
The invention at least comprises the following beneficial effects:
1. according to the assembling method, when the cantilever is assembled at one time, the development time of the colloid strength on the multiple assembling surfaces is partially overlapped, and the time consumed for waiting for the formation of the colloid strength is shortened.
2. The optimized steel beam in the assembly method only needs to be tensioned at a plurality of pairs of section beam sections, and due to the reduction of the tensioning prestressed steel beams, the time consumption of the procedure of tensioning the prestressed steel beams is effectively shortened, and the requirement on manpower is also reduced.
3. Compared with the traditional single-section assembling method, the quick assembling method for the multi-section cantilever of the precast box girder has the advantages that the work efficiency is obviously improved, the construction period is favorably shortened, the labor and equipment use cost is reduced, and the project construction cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a diagram of a prestressed steel strand arrangement in a conventional single-segment cantilever assembling method;
FIG. 2 is a state diagram illustrating the structure of step S1 in the conventional method;
FIG. 3 is a state diagram illustrating the structure of step S2 in the conventional method;
FIG. 4 is a state diagram illustrating the structure of step S3 in the conventional method;
FIG. 5 is a diagram showing the arrangement of prestressed steel bundles when the multi-segment cantilever rapid assembling method is adopted in the present invention;
FIG. 6 is a structural state diagram of step S1 of the method of the present invention;
FIG. 7 is a structural state diagram of step S2 of the method of the present invention;
FIG. 8 is a structural state diagram of step S3 of the method of the present invention;
FIG. 9 is a schematic view of the arrangement of monitoring points according to the present invention;
FIG. 10 is a schematic view of the connection tube and the connection member of the present invention in cooperation with the mold plate;
fig. 11 is a schematic structural view of the matching of two segmental box girders to be assembled according to the invention.
Description of reference numerals:
1. colloid, 2, treat to assemble segmental box roof beam, 3, prestressing steel bundle, 4, connecting pipe, 5, connecting piece, 6, ring groove, 7, screw hole, 8, sealing washer, 9, template, 10, sealing member.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The method provided by the invention is introduced by taking the prefabrication and assembly construction of two continuous concrete box girders as an embodiment. To facilitate the description of the improvement of the proposed method over the conventional method, a conventional single-segment cantilever erection process is introduced.
1) Traditional single-segment cantilever assembling method
When the traditional method is adopted for construction, the prestressed arrangement of the concrete box girder is shown in figure 1, except for a pier top 0# block, the tail end of each section of the box girder needs to be provided with a prestressed anchoring device, and the prestressed anchoring devices are symmetrically tensioned on the center line of a pier.
The cantilever assembly is carried out according to the following procedures:
s1, gluing the end faces of the spliced section box girder ends, wherein the structural state of the step is shown in FIG. 2;
s2, hoisting the adjacent segmental box girders 2 to be assembled, tensioning the temporary prestress to compact and extrude the colloid 1, wherein the structural state of the step is shown in figure 3;
s3, penetrating through the prestressed steel bundles at the beam end of the section box beam 2 to be assembled at the section, wherein the structural state of the step is shown in figure 4;
and S4, tensioning the prestressed steel beam 3 after the strength of the colloid 1 reaches the standard.
2) The invention relates to a method for quickly assembling multi-segment cantilever
If the number of the assembled section box girders is too large (more than 6 pairs) during one-time tensioning, the prestress design may cause inconvenience, and the bridge girder erection machine needs to bear large weight. Thus, the typical one-time stretch splice section box girder segments are between 3 and 6 pairs.
In this embodiment, 3 pairs of beam segments are synchronously assembled as an example for explanation. By adopting the method provided by the invention, because the box girder of each assembled section cannot be tensioned once, the arrangement of the prestressed steel beam 3 needs to be adjusted, and the prestressed steel is anchored on the maximum cantilever end of 3 pairs of girder sections or the top plate tooth block; in addition, in order to resist the web shear, a downward bent prestressed steel strand is provided and anchored to the maximum cantilever end of 3 pairs of beams, the maximum cantilever end being the outermost end of the section box beam, and the modified prestressed steel strand arrangement is shown in fig. 5.
The multi-section cantilever rapid assembly is carried out according to the following procedures:
s1, gluing the beam end faces of the spliced section box beams, wherein the structural state of the step is shown in FIG. 6;
s2, hoisting a section box girder 2 to be spliced adjacent to the spliced section box girder, tensioning the temporary prestress to compress and extrude the colloid 1, circularly finishing the glue application of 3 pairs of girder sections and the temporary prestress to extrude the colloid 1, wherein the 3 pairs of girder sections hoisted in the step are kept hanging on a bridge girder erection machine without loosening hooks, and the structural state of the step is shown in figure 7;
s3, penetrating the prestressed steel bundles 3 at the beam ends of the segmental box beams to be assembled, wherein the structural state of the step is shown in figure 8;
s4, after the glue body 1 strength of the splicing surface of the pair of to-be-spliced section box girders 2 to be finally glued reaches the standard, performing prestress tensioning on a girder end prestress anchoring area to complete splicing of the plurality of pairs of section box girders;
and S5, repeating the steps S1 to S4 until the assembly of all the section box girders is completed.
The work efficiency comparative analysis of the traditional assembling method and the assembling method of the application is as follows:
by adopting the traditional assembly method, the single-pair section box girder assembly needs 6-8 hours, and by adopting the assembly method provided by the invention, taking 3 pairs of section box girders to be assembled synchronously as an example, 10-12 hours are needed when 3 pairs of section box girders are assembled, the work efficiency is about 1.9 times of that of the traditional method, and the work efficiency is greatly improved compared with that of the traditional method.
The construction control main points are assembled to these application multisection section as follows:
and in the prefabrication stage, 6 monitoring points are arranged on each beam section to be assembled, as shown in fig. 9, so as to guide the assembling construction.
Compared with single-section assembly, the method has the following differences and advantages:
difference 1)
Single-section assembling: when every 1 beam section is assembled, the three-dimensional coordinates of 6 measuring points on the beam section need to be acquired so as to judge the development trend of assembly errors and guide the position adjustment of subsequent beam sections, and under certain conditions, the judgment of the assembly errors is seriously influenced by the fact that the error of data acquired by 1-2 measuring points is too large;
assembling multiple sections: and (3) acquiring three-dimensional coordinates of 18-30 measuring points on each beam section every time 3-5 beam sections are assembled, and then carrying out comprehensive processing on the data. Because the number of the measuring points is large, the points with overlarge measuring errors can be removed easily, the real errors of the assembly of the section beam are reflected, and the subsequent assembly of the beam section is guided correctly.
Difference 2)
The construction control process needs parameter sensitivity analysis and corresponding adjustment on parameters such as the self weight and the prestress of the beam section; but because a plurality of factors are entangled, the influence of each parameter is difficult to distinguish; in the process of adopting the multi-section assembling method, the self weight of the beam section is born by a bridge girder erection machine, and the prestress tension process is not needed in the assembling process of the multi-section (3-5 sections), so that the manufacturing error and the assembling process deviation of the beam section can be accurately reflected; therefore, the method is not influenced by factors such as prestress, beam dead weight and elastic modulus, and can be accurately fed back to the prefabrication and assembly process, so that the prefabrication and assembly construction quality is improved.
The assembling method can realize one-time cantilever assembling of a plurality of pairs of prefabricated box girder segments. Compared with the traditional cantilever assembling technology, the invention has the following two improvements: 1) optimizing the arrangement of the prestressed steel bundles; in order to ensure the safety of the structure in the construction period and the operation period, the arrangement of the prestressed steel beams is adjusted. 2) Optimizing the construction process; according to the construction method provided by the invention, a plurality of pairs of segmental beams are assembled by one cantilever, the self weight of the segmental beam without tensioning the prestress in the assembling process is still borne by the bridge girder erection machine, and then the segmental beam can be tensioned at one time to bear the prestress of a plurality of segmental beams.
In step S2, when the temporary prestress is tensioned and the extruded colloid 1 is compressed, if the hole through which the prestress steel beam passes is not sealed, the colloid 1 may enter the hole, thereby affecting the normal penetration and pulling of the subsequent prestress steel beam and further affecting the whole construction process, therefore, the application further provides a hole forming mechanism for forming a hole with good sealing performance, as shown in fig. 10 and 11, the hole forming mechanism includes:
the connecting pipe 4 is positioned in the section box girder 2 to be assembled and forms a central main body of the pore channel;
the connecting piece 5 is arranged at each of two ends of the connecting pipe 4, the connecting piece 5 is provided with a central through hole communicated with the connecting pipe 4, namely the pore channel, the connecting piece 5 is superposed with the central axis of the connecting pipe 4, the inner end part of the connecting piece 5 close to the connecting pipe 4 is provided with an inward-concave annular groove, the end part of the connecting pipe 4 is just matched in the annular groove, the outer end part of the connecting piece 5 far away from the connecting pipe 4 is also provided with an inward-concave annular clamping groove 6, the opening of the annular clamping groove 6 is gradually reduced from the notch to the groove bottom, and a plurality of threaded holes 7 continuously concave towards the inside of the connecting piece 5 are uniformly arranged at intervals in a circle at the groove;
the sealing ring 8 is arranged to be just sealed at the outer end part of the connecting pipe 4, the sealing ring 8 is provided with a plurality of holes which are matched with the threaded holes 7 one by one, and a plurality of bolts are matched with the threaded holes 7, the sealing ring 8 and the template 9 of the connecting piece 5 one by one in sequence;
the sealing element 10 is of an annular structure with uniform middle thickness and then gradually reduced towards two sides, the gradually reduced parts on the two sides of the sealing element 10 are respectively in sealing fit with the annular clamping grooves 6 of the connecting pieces 5 of the two segmental box girders 2 to be assembled, the sealing element 10 is made of rubber materials, an annular thin steel sheet framework is arranged in the center of the sealing element 10, the middle part with uniform thickness of the sealing element 10 is divided into two parts, so that the sealing element 10 is formed by assembling the two parts, and the two parts of the sealing element 10 are respectively provided with a flange and a groove which are matched and assembled.
In the above technical solution, when prefabricating the segmental box girders 2 to be assembled, as shown in fig. 10, first, the two ends of the connecting pipe 4 are respectively clamped in the annular grooves of the two connecting pieces 5, and at this time, the central through holes of the connecting pipe 4 and the two connecting pieces 5 form a pore through which the prestressed steel bundle 3 passes, then two sealing rings 8 are placed at the outer end parts of the connecting pieces 5 at the two ends, holes of the sealing rings 8 are matched with the threaded holes 7 one by one, the position of the connecting piece 5 is adjusted according to the position of the screw hole on the template 9, so that the bolt can sequentially pass through the screw hole on the template 9, the hole of the sealing ring 8 and the threaded hole 7 on the connecting piece 5 to hermetically connect the template 9 and the connecting piece 5, after the connecting pipe 4, the connecting piece 5 and the template 9 are assembled, the pouring of the concrete can be smoothly realized, and the concrete does not enter the annular clamping groove 6 of the connecting pipe 4 and the connecting piece 5. After the prefabrication of the assembled section box girder 2 is completed, the template 9 and the sealing ring 8 are removed, the next step of gluing and temporary tensioning is carried out, as shown in fig. 11, two adjacent ring-shaped clamping grooves 6 of the assembled section box girder 2 are connected in a sealing mode through a sealing element 10, the parts on two sides of the sealing element 10 respectively enter the two ring-shaped clamping grooves 6 to be clamped in a sealing mode, sealing colloid 1 is blocked, the length of each ring-shaped clamping groove 6 is longer than that of the parts on two sides of the sealing element 10, the colloid 1 is compressed subsequently, and when the two assembled section box girders 2 are close to each other, a certain telescopic space is reserved in the sealing element 10. The middle of the sealing element 10 is a thin steel sheet annular framework and is finally formed by rubber cladding on the outer side, and on one hand, the sealing element 10 has a certain strength structure, and on the other hand, the sealing property of the sealing element is not influenced. Sealing member 10 sets up to two parts, cooperates earlier in ring groove 6 through two parts respectively before paining colloid 1, prevents that colloid 1 from entering into ring groove 6 when paining in, and colloid 1 paints the completion, when compressing tightly crowded glue, and the two parts of sealing member 10 are aimed at and are formed a whole, and when further compressing tightly, sealing member 10 extends to ring groove 6 of both sides respectively and realizes further inseparabler sealed, guarantees that colloid 1 can not carry out in the pore.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The method for quickly assembling the multi-section cantilever of the precast box girder is characterized by comprising the following steps of:
s1, gluing the spliced end faces of the spliced section box girders;
s2, hoisting the section box girders to be spliced adjacent to the spliced section box girders, tensioning the temporary prestress to compress and extrude colloid, and circularly finishing the glue smearing and temporary prestress tensioning between the splicing end faces of the plurality of pairs of section box girders;
s3, penetrating through the prestressed steel bundles of the segment box girder to be assembled;
s4, after the glue strength of the splicing surfaces of the pair of section box girders to be spliced, which are finally glued, meets the requirement, prestress tensioning is carried out to complete the splicing of the plurality of sections of the section box girders;
and S5, repeating the steps S1 to S4 until the assembly of all the section box girders is completed.
2. The method for rapidly assembling the multi-segment cantilever of the precast box girder of claim 1, wherein in the step S2, 3 to 6 pairs of the segment box girder are assembled at one time.
3. The multi-segment cantilever rapid assembling method of the precast box girder of claim 1, wherein in the step S4, the prestress is anchored on the most cantilevered end of the plurality of pairs of segment box girders or the top plate tooth block.
4. The method for rapidly assembling the multi-segment cantilever of the precast box girder of claim 1, wherein in the step S3, the prestressed steel bundles on the segment box girder to be assembled comprise straight bundles and downward bent bundles, which are anchored to the maximum cantilever ends of the plurality of pairs of segment box girders to the position close to the web.
5. The method for rapidly assembling the multi-section cantilever of the precast box girder as claimed in claim 1, wherein the self weight of the section box girder to be assembled without being prestressed by tension is borne by a bridge girder erection machine during the assembling process.
6. The method for rapidly assembling the multi-section cantilever of the precast box girder as claimed in claim 1, wherein the pre-stress tension is a tension sufficient to bear the pre-stress of a plurality of pairs of section box girders at one time.
7. The method for rapidly assembling the multi-section cantilever of the precast box girder as claimed in claim 1, wherein 6 monitoring points are uniformly arranged on each section of the box girder to be assembled in a transverse and longitudinal staggered manner.
8. The method for rapidly assembling the multi-segment cantilever of the precast box girder as claimed in claim 1, wherein the segment box girder to be assembled has a hole for passing through the prestressed steel bundle therein, the hole is formed by a hole forming mechanism, and the hole forming mechanism comprises:
the connecting pipe is positioned in the section box girder to be assembled and forms a central main body of the pore channel;
the connecting piece is provided with a central through hole communicated with the connecting pipe, namely the pore passage, the connecting piece is superposed with the central axis of the connecting pipe, the inner end part of the connecting piece, which is close to the connecting pipe, is provided with an inward-concave annular groove, the end part of the connecting pipe is just matched in the annular groove, the outer end part of the connecting piece, which is far away from the connecting pipe, is also provided with an inward-concave annular clamping groove, the opening of the annular clamping groove is gradually reduced from the notch to the bottom of the groove, and a plurality of threaded holes which are continuously concave towards the inside of the connecting piece are uniformly arranged at intervals in a circle at the bottom of the;
the sealing ring is arranged to be just sealed at the outer end part of the connecting pipe, the sealing ring is provided with a plurality of holes which are matched with the threaded holes one by one, and a plurality of bolts are matched one by one and are sequentially connected with the threaded holes of the connecting piece, the sealing ring and the template;
the sealing element is of an annular structure with uniform middle thickness and gradually reduced towards two sides, and the gradually reduced parts on the two sides of the sealing element are respectively in sealing fit with annular clamping grooves of the connecting pieces of the two section box girders to be assembled.
9. The method for rapidly assembling the multi-section cantilever of the precast box girder as claimed in claim 8, wherein the sealing member is made of rubber and has an annular thin steel sheet framework in the center.
10. A method for rapidly assembling a multi-segment cantilever of a precast box girder according to claim 8, wherein the sealing member is divided into two parts at a middle portion having a uniform thickness so that the sealing member is assembled by two parts, and the two parts of the sealing member are assembled by respectively providing a flange and a groove to be matched.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU420542A1 (en) * | 1972-07-26 | 1974-03-25 | внеклассных , больших мостов | CONSOLE CRANE FOR PENDING INSTALLATION "PIONERNB1M" METHOD OF REINFORCED BRIDGES OF LARGE SPANES. . ; • • 1йh - U.s> & a |
| DE10019050C1 (en) * | 2000-04-18 | 2001-11-29 | Matthias Braun | Platform for building bridges, has a central section for preparing a sandwich panel base, which comprises a front platform for assembling steel sections and rear platform for fitting cantilever components |
| CN101684638A (en) * | 2008-09-23 | 2010-03-31 | 中交第三航务工程局有限公司 | Assembly method of section box girder |
| CN104652283A (en) * | 2015-01-09 | 2015-05-27 | 中铁港航局集团有限公司 | Asynchronous splicing construction method for symmetrically splicing main steel girder erection cranes of cable-stayed bridge |
| CN105780660A (en) * | 2016-03-23 | 2016-07-20 | 中铁局集团有限公司 | Segmental assembling box girder construction technology |
| CN109137759A (en) * | 2018-09-29 | 2019-01-04 | 中铁第四勘察设计院集团有限公司 | A kind of prestressed concrete box girder precast segment cantilever assembling method and system |
| CN209128899U (en) * | 2018-11-15 | 2019-07-19 | 天津城建大学 | A kind of precast segment free cantilever erection bridge prefabrication shear connector structure |
| CN110468682A (en) * | 2019-09-04 | 2019-11-19 | 中铁第四勘察设计院集团有限公司 | A kind of precast segment assembly bridge joint structure and its construction method |
| CN110777669A (en) * | 2019-11-15 | 2020-02-11 | 中铁北京工程局集团有限公司 | High-speed rail continuous beam short line matching prefabricated cantilever assembly line shape control method |
| CN110904844A (en) * | 2019-11-29 | 2020-03-24 | 中铁第四勘察设计院集团有限公司 | Construction device and construction method suitable for integral hoisting of suspended cast beam steel bar segments |
| CN210194418U (en) * | 2019-01-30 | 2020-03-27 | 北京工业大学 | Modularization prefabricated reinforced concrete hollow pier structure |
| CN210316592U (en) * | 2019-06-04 | 2020-04-14 | 中电建十一局工程有限公司 | Prestressed pipeline positioning device of segment beam |
| CN210916962U (en) * | 2019-05-27 | 2020-07-03 | 天津城建大学 | Segmental precast beam of cantilever assembly bridge and splicing structure thereof |
-
2020
- 2020-07-21 CN CN202010705656.9A patent/CN111996914B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU420542A1 (en) * | 1972-07-26 | 1974-03-25 | внеклассных , больших мостов | CONSOLE CRANE FOR PENDING INSTALLATION "PIONERNB1M" METHOD OF REINFORCED BRIDGES OF LARGE SPANES. . ; • • 1йh - U.s> & a |
| DE10019050C1 (en) * | 2000-04-18 | 2001-11-29 | Matthias Braun | Platform for building bridges, has a central section for preparing a sandwich panel base, which comprises a front platform for assembling steel sections and rear platform for fitting cantilever components |
| CN101684638A (en) * | 2008-09-23 | 2010-03-31 | 中交第三航务工程局有限公司 | Assembly method of section box girder |
| CN104652283A (en) * | 2015-01-09 | 2015-05-27 | 中铁港航局集团有限公司 | Asynchronous splicing construction method for symmetrically splicing main steel girder erection cranes of cable-stayed bridge |
| CN105780660A (en) * | 2016-03-23 | 2016-07-20 | 中铁局集团有限公司 | Segmental assembling box girder construction technology |
| CN109137759A (en) * | 2018-09-29 | 2019-01-04 | 中铁第四勘察设计院集团有限公司 | A kind of prestressed concrete box girder precast segment cantilever assembling method and system |
| CN209128899U (en) * | 2018-11-15 | 2019-07-19 | 天津城建大学 | A kind of precast segment free cantilever erection bridge prefabrication shear connector structure |
| CN210194418U (en) * | 2019-01-30 | 2020-03-27 | 北京工业大学 | Modularization prefabricated reinforced concrete hollow pier structure |
| CN210916962U (en) * | 2019-05-27 | 2020-07-03 | 天津城建大学 | Segmental precast beam of cantilever assembly bridge and splicing structure thereof |
| CN210316592U (en) * | 2019-06-04 | 2020-04-14 | 中电建十一局工程有限公司 | Prestressed pipeline positioning device of segment beam |
| CN110468682A (en) * | 2019-09-04 | 2019-11-19 | 中铁第四勘察设计院集团有限公司 | A kind of precast segment assembly bridge joint structure and its construction method |
| CN110777669A (en) * | 2019-11-15 | 2020-02-11 | 中铁北京工程局集团有限公司 | High-speed rail continuous beam short line matching prefabricated cantilever assembly line shape control method |
| CN110904844A (en) * | 2019-11-29 | 2020-03-24 | 中铁第四勘察设计院集团有限公司 | Construction device and construction method suitable for integral hoisting of suspended cast beam steel bar segments |
Non-Patent Citations (2)
| Title |
|---|
| 刘鹏等: "青州航道桥边跨大节段钢箱梁组拼控制技术研究", 《武汉理工大学学报(交通科学与工程版)》 * |
| 施威: "京唐铁路潮白新河特大桥节段预制胶拼法建造关键技术研究", 《铁道标准设计》 * |
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