CN-121992713-A - Sectional assembled corrugated steel web mixed beam bridge and construction method thereof

CN121992713ACN 121992713 ACN121992713 ACN 121992713ACN-121992713-A

Abstract

The invention relates to the technical field of bridges, and provides a segmental assembled corrugated steel web hybrid girder bridge and a construction method thereof, wherein a side span and a middle span are formed by a first type of girder segments, and the girder segments comprise a first concrete top plate, a first concrete bottom plate and a first corrugated steel web; the midspan region is composed of a second type of beam section, and comprises a steel bottom plate, an ultra-high performance concrete combined top plate and a second wavy steel web plate, wherein the combined beam section is connected between the two types of beam sections to realize smooth transition. According to the invention, through the longitudinal partition structure design, the advantages of the respective materials are fully exerted, the side-to-middle-span ratio can be compressed to 0.35-0.60, and the spanning capability is remarkably improved. The self weight of the midspan is reduced by 50% by adopting the ultra-high performance concrete combined top plate, and the risk of cracking the midspan bottom plate is thoroughly eliminated by adopting the steel bottom plate to replace the concrete bottom plate. The invention adopts segment prefabrication assembly construction, has standardized process and strong adaptability to soft foundations, and solves the problems of mid-span downwarping and web cracking.

Inventors

LIU YONG
CHEN GUANG
ZHANG XIN
WANG QING
LI LIANG
PAN CONG
LI YU
LI WENWU
HE YAOBEI
LU LIZHI
Ouyang zhou
ZHOU CHUANLIN

Assignees

湖南省交通规划勘察设计院有限公司
长沙市规划设计院有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260403

Claims (10)

1. The section assembled corrugated steel web hybrid girder bridge is characterized by comprising at least one midspan and side spans respectively arranged at two sides of the midspan, wherein: The side span and the middle span are respectively formed by a plurality of first-type beam sections in the area close to the bridge pier, and each first-type beam Duan Jun comprises a first concrete top plate, a first concrete bottom plate and a first corrugated steel web; The midspan region of the midspan is composed of at least one second type beam section, and each second type beam Duan Jun comprises a steel bottom plate, an ultra-high performance concrete combined top plate and a second wavy steel web; The midspan further comprises two combined beam sections which are symmetrically arranged, wherein the combined beam sections are connected between the adjacent first-type beam sections and the second-type beam sections, the combined beam sections are used for realizing transitional connection between the first-type beam sections and the second-type beam sections, and the first-type beam sections, the second-type beam sections and the combined beam sections are factory-section prefabricated beam sections.
2. The segmental assembled corrugated steel web hybrid girder bridge according to claim 1, wherein in the first girder segment, shear connectors are arranged at the upper end and the lower end of the first corrugated steel web, and the shear connectors are buried in the first concrete top plate and the first concrete bottom plate; the first concrete top plate is connected with the upper end of the first corrugated steel web through the shear connector, and the first concrete bottom plate is connected with the lower end of the first corrugated steel web through the shear connector; The end part of the first beam section is provided with a first seam structure, the first seam structure comprises a first reserved hole channel and first shear key teeth, which are penetrated by a prestress beam in a donor, and the first convex shear key arranged on the end surface of one first beam section and the first concave shear groove arranged on the end surface of the other first beam section are mutually matched in two adjacent first beam sections, and the seam glue is filled in the matched gap of the first convex shear key and the first concave shear groove.
3. The segmented, assembled, corrugated steel web hybrid girder bridge of claim 2, wherein, in the second class of girder segments: The ultra-high performance concrete combined top plate is of a ribbed combined structure and comprises a plurality of longitudinal ribs which are uniformly arranged along the transverse bridge direction, wherein the bottom of each longitudinal rib is provided with a rib bottom steel plate, and first shear nails are fixed on the rib bottom steel plates; The second type beam section further comprises a hollow cross brace which is of a triangular space structure and is fixedly connected with the steel bottom plate and the second corrugated steel web; the top of the steel bottom plate is transversely provided with bottom plate longitudinal stiffening ribs at intervals; The end part of the second beam section is provided with a second joint structure, the second joint structure comprises a second reserved hole channel and second shear key teeth, wherein prestress beams in a donor penetrate through the second reserved hole channel and the second shear key teeth, in two adjacent second beam sections, a second convex shear key arranged on the end face of one second beam section is matched with a second concave shear groove arranged on the end face of the other second beam section, and joint glue is filled in a fit gap between the second convex shear key and the second concave shear groove.
4. The segmented, assembled, wave form steel web hybrid girder bridge of claim 3, wherein the joined girder segments comprise a top plate joined configuration, a bottom plate joined configuration, a web joined configuration, wherein: The top plate combination structure comprises a connecting steel plate connected with the rib bottom steel plate in sequence, a second shear pin fixed on the connecting steel plate and an integrated top plate formed by integrally casting ordinary concrete and ultra-high performance concrete, wherein a third reserved pore canal for the internal prestress beam to pass through is pre-buried in the integrated top plate; The bottom plate combination structure comprises a second concrete bottom plate, an outer cover bottom plate connected with the steel bottom plate of the second type beam section in sequence, a plurality of rows of first perforated steel plates fixed on the upper surface of the outer cover bottom plate, steel end plates arranged at the positions of the combination surfaces of the common concrete and the ultra-high performance concrete, and a bottom plate prestress beam with one end anchored to the steel end plates and the other end anchored to the adjacent first type beam section, wherein the first perforated steel plates are partially embedded in the second concrete bottom plate, penetrating steel bars penetrate through the first perforated steel plates, the steel end plates are fixedly connected with the outer cover bottom plate, the outer cover bottom plate extends into the second concrete bottom plate, the first perforated steel plates are connected with longitudinal stiffening ribs of the bottom plate to form a continuous structure, and the steel end plates are provided with notches for the first perforated steel plates to pass through; The web bonding structure comprises butt welding, foot bonding welding or bolt welding bonding connection used for connecting the first corrugated steel web and the second corrugated steel web, and a Twin-PBL connecting piece or angle steel connecting piece used for connecting a third corrugated steel web of the web bonding structure and the integrated top plate and the second concrete bottom plate.
5. The segmented, assembled, wave form steel web hybrid bridge of claim 4, wherein in the joined beam segments: The third corrugated steel web of the web combination structure is integrally blanking molded in a factory, welded with the steel end plate at the position of the web height change and connected with the second concrete bottom plate through a second perforated steel plate; The third corrugated steel web is connected with the second concrete bottom plate by adopting an angle steel connecting piece; the third corrugated steel web is connected with the integrated top plate by adopting a Twin-PBL connecting piece; The third corrugated steel web plate and the first corrugated steel web plate are connected by butt welding, foot bonding welding or bolt welding; and the third corrugated steel web plate and the second corrugated steel web plate are connected by butt welding, foot bonding welding or bolt welding.
6. The section-spliced wavy steel web hybrid girder bridge according to claim 1 is characterized in that a steering diaphragm is arranged in a first girder section and a second girder section of a main span variable-height section, wherein the steering diaphragm is of a reinforced concrete structure in the first girder section and is of a solid web type steel diaphragm structure in the second girder section, and holes for external prestress bundles to steer are formed in the steering diaphragm.
7. The segmented spliced wavy steel web hybrid girder bridge of claim 3, wherein the first type of girder segment, the combined girder segment and the second type of girder segment are each provided with a splice construction therebetween, the splice constructions comprising the first splice construction, the second splice construction, a third splice construction provided at an end of the combined girder segment near the first type of girder segment, and a fourth splice construction provided at an end of the combined girder segment near the second type of girder segment, wherein the third splice construction is identical to the first splice construction, and the fourth splice construction is identical to the second splice construction.
8. The segmental assembled corrugated steel web hybrid girder bridge according to claim 1, wherein the ratio of the span of the side span to the span of the middle span is 0.35-0.60, the number of the second type girder segments is 1-5, and when the ratio of the spans is less than 0.45, barite concrete weight is arranged on a bracket prefabricated segment of the side span and a girder end cast-in-place segment.
9. The segmental assembled corrugated steel web hybrid girder bridge according to claim 3, wherein the transverse ribs are arranged at intervals along the longitudinal bridge direction, the longitudinal distance between two adjacent transverse ribs is 1-2 wavelengths of the second corrugated steel web, and both ends of the second girder segment are provided with the transverse ribs.
10. A construction method of a segment-assembled corrugated steel web hybrid girder bridge, which is applied to the segment-assembled corrugated steel web hybrid girder bridge as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps: S1, constructing bridge piers and foundations, and pouring a 0# beam section; S2, symmetrically cantilever assembling N first-class beam sections on two sides of the 0# beam section, and tensioning an internal prestress beam corresponding to the first-class beam sections, wherein N is more than or equal to 1, and N is a positive integer; s3, continuing to symmetrically assemble the n+1th first-class beam section of the side span and the combined beam section of the middle span, and stretching the internal pre-stress beam of the corresponding beam section; s4, casting a beam end cast-in-place section of the side span by the bracket, and installing a bracket prefabrication section of the side span by the bracket; S5, installing a rigid connection assembly of the side span closure section, hoisting a corrugated steel web of the side span closure beam section, binding top and bottom plate steel bars, pouring closure section concrete, and tensioning a prestressed bundle in the bottom plate body of the side span; s6, continuing to carry out weight construction in the box bodies of M second type beam sections on the single-side cantilever assembled main span side, stretching the internal pre-stress beam of the corresponding beam section, the bracket prefabricated section of the synchronous opposite span and the beam end cast-in-situ section, hoisting the steel groove beam of the middle span closure section, connecting the steel groove beam, pouring roof joint concrete, and stretching the roof pre-stress beam of the middle span closure section; s7, stretching the full-bridge external pre-stress beam; s8, constructing auxiliary facilities of the bridge deck.

Description

Sectional assembled corrugated steel web mixed beam bridge and construction method thereof Technical Field The invention relates to the technical field of bridge engineering, in particular to a section-spliced corrugated steel web hybrid girder bridge and a construction method thereof. Background In recent years, the corrugated steel web steel groove composite beam is gradually applied to real bridge engineering, but when in a top-bottom hogging moment area, the bridge bottom plate faces complex stress, poor compression stability and poor economy, and a steel-concrete composite bottom plate structure has to be adopted. As a large-span girder bridge, a main span is generally adopted to span a main obstacle, but the main span is limited by structural stress factors, and the length of a side span is generally 0.55-0.65 times that of a middle span so as to prevent overlarge negative reaction force from occurring on a side span support, and the larger side-to-middle span ratio also causes the increase of the bridge length (construction scale) and is unfavorable for the control of the bridge scale and engineering cost. The bridge deck directly bears the running loads such as automobile wheel load, the safe and reliable structure is the key of the stress of the bridge structure, the conventional concrete bridge deck is controlled by transverse span, the plate thickness can reach 26-32cm, and the dead weight of the bridge deck is overlarge. The construction of segment prefabrication and assembly is a high-efficiency construction mode of a large-span bridge by means of factory prefabrication, segmental transportation and rapid assembly, has high prefabrication quality of components, high site construction speed and is favorable for realizing four-segment one-environmental protection (energy conservation, land conservation, water conservation, material conservation and environmental protection) of bridge construction, and is an important realization way of green construction of the bridge. At present, the wave-shaped steel web plate combined beam section suspension splicing construction cases are fewer, the wave-shaped steel web plate steel groove combined beam section splicing technology is blank, for example, chinese patent application CN121556345A discloses a large-span wave-shaped steel web plate combined beam and a construction method thereof, wherein a section splicing standard splice is disclosed, but the splice is only applicable to the connection between concrete top and bottom plates and between wave-shaped steel webs. In summary, the prior corrugated steel web composite beam has limited span, poor compression stability of the corrugated steel web steel groove composite beam bottom plate, large structural side-to-middle span ratio and difficult control of construction scale, and no corrugated steel web steel groove composite beam segment prefabrication and assembly construction technology exists at present, so that the development of the corrugated steel web composite beam bridge structure with more excellent stress performance and the provision of a suitable construction method have important significance. In view of this, there is a need for a segment-spliced corrugated steel web hybrid girder bridge and method of construction thereof that addresses or at least alleviates the above-mentioned drawbacks. Disclosure of Invention The invention mainly aims to provide a segmental spliced corrugated steel web hybrid girder bridge and a construction method thereof, which are used for solving the technical problems of limited span of the traditional corrugated steel web composite girder, poor compression stability of a corrugated steel web steel groove composite girder bottom plate and large mid-span ratio of structural edges. In order to achieve the above purpose, the invention provides a section assembled corrugated steel web hybrid girder bridge, which comprises at least one midspan and side spans respectively arranged at two sides of the midspan, wherein: The side span and the middle span are respectively formed by a plurality of first-type beam sections in the area close to the bridge pier, and each first-type beam Duan Jun comprises a first concrete top plate, a first concrete bottom plate and a first corrugated steel web; The midspan region of the midspan is composed of at least one second type beam section, and each second type beam Duan Jun comprises a steel bottom plate, an ultra-high performance concrete combined top plate and a second wavy steel web; The midspan further comprises two combined beam sections which are symmetrically arranged, wherein the combined beam sections are connected between the adjacent first-type beam sections and the second-type beam sections, the combined beam sections are used for realizing transitional connection between the first-type beam sections and the second-type beam sections, and the first-type beam sections, the second-type beam sections and the combined beam section