CN109629421B - Construction method for segment beam additionally provided with steel pipe and horizontally distributed steel bars - Google Patents

Construction method for segment beam additionally provided with steel pipe and horizontally distributed steel bars Download PDF

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Publication number
CN109629421B
CN109629421B CN201811384541.3A CN201811384541A CN109629421B CN 109629421 B CN109629421 B CN 109629421B CN 201811384541 A CN201811384541 A CN 201811384541A CN 109629421 B CN109629421 B CN 109629421B
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sections
steel
horizontally distributed
steel bars
segment
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CN109629421A (en
Inventor
刘超
王胜斌
徐栋
邱体军
胡胜来
唐国喜
端木祥永
雷俊
周璇
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Tongji University
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Tongji University
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention discloses a construction method for a segmental beam additionally provided with steel pipes and horizontally distributed reinforcing steel bars, which comprises the following steps: prefabricating a plurality of beam sections, reserving a plurality of pore channels with enough anchoring length at two ends of each beam section, and installing steel pipes in the pore channels; transporting a plurality of beam sections to a construction site, and splicing the sections; injecting first glue into a plurality of steel pipes at one end of a beam section; inserting one end of a plurality of horizontally distributed reinforcing steel bars into a plurality of steel pipes at one end of a beam section respectively, and erasing first glue extruded by the horizontally distributed reinforcing steel bars; coating second glue on the joint section; injecting first glue into the steel pipe at one end of the other beam section, and respectively inserting the other ends of the plurality of horizontally distributed steel bars into the steel pipe at one end of the other beam section; and repeating the steps until the segment assembly is completed. The invention can manufacture the segmental beam with the horizontally distributed steel bars, and the added horizontally distributed steel bars can increase the bending resistance bearing capacity and the shearing resistance bearing capacity of the joint of the segmental beam.

Description

Construction method for segment beam additionally provided with steel pipe and horizontally distributed steel bars
Technical Field
The invention relates to a construction method of a segmental beam, in particular to a construction method of a segmental beam additionally provided with steel pipes and horizontally distributed reinforcing steel bars.
Background
The existing segmental beams are generally spliced together in a wet joint or adhesive joint mode, and the construction period of the segmental beams is long due to the wet joint mode, so that the aims of fully exerting the segmental beams, shortening the field construction period and improving the construction efficiency are fulfilled; the bending and shearing resistance of the joint of the segmental beam in the pure gluing mode is relatively poor.
Chinese patent CN104047225B discloses a segment prefabricated assembled beam structure with steel sleeve elastic shear tenons. The prefabricated beam body comprises a box beam type beam body prefabricated section, wherein the edges of cavities on two end faces of the beam body prefabricated section are provided with circumferential transverse partition plates, reserved holes are uniformly arranged on the transverse partition plates, and outer sleeve steel pipes are embedded in the reserved holes; splicing the prefabricated sections of two adjacent sections of beam bodies, and inserting inner sleeve steel pipes into outer sleeve steel pipes corresponding to the prefabricated sections; the inner sleeve steel pipe is provided with an axial inner sleeve cutting seam, and one end of the inner sleeve steel pipe is conical. The structure is complex and the manufacturing and construction costs are high.
Chinese patent CN106758753B discloses a cable-beam combined bridge and a construction method thereof, the cable-beam combined bridge comprises a plurality of bridge sections, the bridge sections comprise a beam structure, a pavement layer and a cable structure, the beam structure comprises a plurality of rows of longitudinal beams, and the cable structure comprises a cable and a brace; the construction method is used for constructing the constructed bridge by dividing a plurality of bridge sections from front to back along the longitudinal extension direction of the bridge, the construction methods of the bridge sections are the same, and the construction process of any one bridge section comprises the following steps: firstly, constructing a first bridge section: 101. constructing a beam structure, 102, installing a steel cable structure, 103, paving a bridge deck; secondly, constructing the next bridge section; and thirdly, repeating the step two for many times until the whole construction process of the constructed bridge is completed. The transverse clapboards are formed by casting reinforced concrete in situ between two adjacent longitudinal beams and between two adjacent longitudinal beam sections, and the mode belongs to wet connection and has long construction period.
Chinese patent CN108560402A discloses a prefabricated capping beam and a construction method thereof, wherein the prefabricated capping beam comprises: the bent cap comprises a plurality of bent cap sections, a plurality of threaded steel bars are pre-embedded in each bent cap section, the bent cap sections are spliced and assembled, and an operation slotted hole is formed in the position, corresponding to the threaded steel bars, of the splicing end of each two adjacent bent cap sections; and the screwed reinforcing steel bar connectors are spliced by the screwed reinforcing steel bar connectors of every two adjacent capping beam sections, and the screwed reinforcing steel bar connectors are accommodated in the operation slotted holes. The prefabricated capping beam needs to connect the twisted steel bars of every two adjacent capping beam sections in the operation slotted holes of the capping beam sections through the twisted steel bar connectors until the splicing of the prefabricated capping beam is completed. The construction of the process must use standardized twisted steel connectors, which increases the cost on the one hand, and makes the construction process complicated and reduces the efficiency on the other hand.
Disclosure of Invention
The invention aims to provide a novel construction method for a segmental beam additionally provided with steel pipes and horizontally distributed steel bars. The segment beam construction method mainly uses the segment beam additionally provided with the horizontally distributed reinforcing steel bars, and the bending resistance, the bearing capacity and the shearing resistance of the joint of the segment beam can be improved by adopting the segment beam and the construction method.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a first construction method for a segmental beam additionally provided with steel pipes and horizontally distributed reinforcing steel bars, which comprises the following steps of:
a1: prefabricating a plurality of beam sections, reserving a plurality of pore channels with enough anchoring length at two ends of each beam section, and installing steel pipes in the pore channels to enable the end surfaces of the steel pipes to be flush with the butt joint end surfaces of the beam sections;
a2: conveying a plurality of beam sections to a construction site, and assembling the sections;
a3: injecting first glue into the steel pipes at the second end of the first beam section;
a4: inserting first ends of a plurality of horizontally distributed reinforcing steel bars into a plurality of steel pipes at the second end of the first beam section respectively, and wiping off the first glue extruded by the horizontally distributed reinforcing steel bars;
a5: the end face of the second end of the first beam section is a joint section, and second glue is smeared on the joint section of the first beam section;
a6: injecting first glue into the steel pipe at the first end of the second beam section, and respectively inserting the second ends of the horizontally distributed steel bars inserted into the first beam section into the steel pipe at the first end of the second beam section, so as to finish the splicing of the second ends of the first beam section and the first end of the second beam section;
a7: referring to steps A3-a 6, the splicing of the second end of the second beam segment to the first end of the third beam segment and the splicing of the second end of the third beam segment to the first end of the fourth beam segment are continuously completed until the splicing of the segments is completed.
In an embodiment of the present invention, the construction method may further include:
a8: and tensioning the temporary prestress to ensure that a certain amount of compressive stress exists in the joint section of two adjacent beam sections.
In one embodiment of the invention, the outer ends of both beam segments at both ends of the segment beam are not connected to horizontal distribution bars.
In one embodiment of the invention, each of said horizontally distributed reinforcing bars is located entirely within two adjacent beam segments.
In one embodiment of the present invention, the tunnels are all horizontally opened along the extending direction of the beam segment, and thus the steel pipes are all horizontally arranged along the extending direction of the beam segment.
In one embodiment of the present invention, a plurality of the horizontally distributed reinforcing bars are arranged in a vertical direction, or,
a plurality of the horizontally distributed reinforcing steel bars are arranged along the horizontal direction, or,
and the plurality of horizontally distributed reinforcing steel bars are arranged along the vertical direction and are also arranged along the horizontal direction.
In one embodiment of the invention, each of the beam segments has a rectangular, box, T or i-shaped cross-section.
In one embodiment of the invention, the first glue is a glue capable of bonding a steel bar and a steel pipe, and the second glue is a glue capable of bonding concrete and concrete.
The invention provides a second construction method for a segmental beam additionally provided with steel pipes and horizontally distributed reinforcing steel bars, which comprises the following steps of:
b1: prefabricating a plurality of beam sections, reserving a plurality of pore canals with enough anchoring length at the first end of each beam section, installing steel pipes in the pore canals, enabling the end surfaces of the steel pipes to be flush with the butt joint end surfaces of the beam sections, and simultaneously embedding a plurality of horizontally distributed reinforcing steel bars extending out of enough anchoring length at the second end of each beam section;
b2: conveying a plurality of beam sections to a construction site, and assembling the sections;
b3: injecting first glue into a plurality of steel pipes of the first beam section;
b4: the end surfaces of the first end and the second end of the beam section are joint sections, and second glue is smeared on the joint sections of the first end of the beam section;
b5: respectively inserting a plurality of horizontally distributed steel bars of the second beam section into a plurality of steel pipes of the first beam section, so that the first beam section and the second beam section are spliced;
b6: and referring to the steps B3 to B5, splicing the third beam section and the second beam section and splicing the fourth beam section and the third beam section are continuously completed until the sections are completely assembled.
In an embodiment of the present invention, the construction method may further include:
b7: and tensioning the temporary prestress to ensure that a certain amount of compressive stress exists in the joint section of two adjacent beam sections.
In one embodiment of the invention, the outer ends of both beam segments at both ends of the segment beam are not connected to horizontal distribution bars.
In one embodiment of the invention, each of said horizontally distributed reinforcing bars is located entirely within two adjacent beam segments.
In one embodiment of the present invention, the tunnels are all horizontally opened along the extending direction of the beam segment, and thus the steel pipes are all horizontally arranged along the extending direction of the beam segment.
In one embodiment of the present invention, a plurality of the horizontally distributed reinforcing bars are arranged in a vertical direction, or,
a plurality of the horizontally distributed reinforcing steel bars are arranged along the horizontal direction, or,
and the plurality of horizontally distributed reinforcing steel bars are arranged along the vertical direction and are also arranged along the horizontal direction.
In one embodiment of the invention, each of the beam segments has a rectangular, box, T or i-shaped cross-section.
In one embodiment of the invention, the first glue is a glue capable of bonding a steel bar and a steel pipe, and the second glue is a glue capable of bonding concrete and concrete.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention can manufacture the segmental beam with the horizontally distributed steel bars, and the added horizontally distributed steel bars can increase the bending resistance bearing capacity and the shearing resistance bearing capacity of the joint of the segmental beam.
2. The invention adopts the mode of precast beam, and the construction process is simple, the construction period is short, and the construction efficiency is high.
Drawings
FIG. 1 is a schematic view of a sectional girder according to a construction method of the sectional girder of the present invention;
fig. 2 is a sectional assembly view illustrating a construction method of a sectional girder according to the present invention.
In the drawings: 1. a segment beam; 11. a first beam segment; 12. a second beam segment; 2. a steel pipe; 3. and horizontally distributing the steel bars.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
The embodiment provides a construction method of a segmental beam 1, and with reference to fig. 1 and 2, the construction method comprises the following steps:
a1: prefabricating a plurality of beam sections, reserving a plurality of pore channels with enough anchoring length at two ends of each beam section, and installing steel pipes 2 in the pore channels to enable the end surfaces of the steel pipes 2 to be flush with the butt joint end surfaces of the beam sections;
a2: transporting a plurality of beam sections to a construction site, and splicing the sections;
a3: injecting first glue into the steel pipes 2 at the second end of the first beam section 11;
a4: inserting first ends of a plurality of horizontally distributed reinforcing steel bars 3 into a plurality of steel pipes 2 at second ends of the first beam sections 11 respectively, and erasing first glue extruded by the horizontally distributed reinforcing steel bars 3;
a5: the end face of the second end of the first beam section 11 is a joint section, and second glue is coated on the joint section of the first beam section 11;
a6: injecting first glue into the steel pipe 2 at the first end of the second beam section 12, and respectively inserting the second ends of the horizontally distributed steel bars 3 inserted into the first beam section 11 into the steel pipe 2 at the first end of the second beam section 12, so as to complete the splicing of the second end of the first beam section 11 and the first end of the second beam section 12;
a7: referring to steps A3 through a6, the second beam segment 12 is spliced to the third beam segment first end and the third beam segment second end is spliced to the fourth beam segment first end until the segments are completely assembled.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope and the implementation manner of the present invention.
The present invention also has the following embodiments in addition to the above:
in an embodiment of the present invention, the construction method may further include:
a8: and tensioning the temporary prestress to ensure that a certain amount of compressive stress exists in the joint section of two adjacent beam sections.
In one embodiment, the outer ends of two beam segments at both ends of the segment beam 1 are not connected with the horizontal distribution steel bars 3.
In one embodiment, each horizontally distributed reinforcement 3 is located entirely within two adjacent beam segments.
In one embodiment, the openings are all horizontally opened along the extending direction of the beam segment, so that all the steel pipes 2 are horizontally arranged along the extending direction of the beam segment.
In one embodiment, a plurality of horizontally distributed reinforcing bars 3 are arranged in a vertical direction, or,
a plurality of horizontally distributed reinforcing bars 3 are arranged in the horizontal direction, or,
the plurality of horizontally distributed reinforcing steel bars 3 are arranged in the vertical direction and are also arranged in the horizontal direction.
In one embodiment, each beam segment is rectangular, box-shaped, T-shaped, or i-shaped in cross-section.
In this embodiment, first glue adopts the glue that reinforcing bar and steel pipe can bond, and the second glue adopts the glue that concrete and concrete can bond.
Example 2
The present embodiment provides a second construction method of a segmental beam 1, and with reference to fig. 1 and 2, the construction method includes the following steps:
b1: prefabricating a plurality of beam sections, reserving a plurality of pore canals with enough anchoring length at the first end of each beam section, installing steel pipes 2 in the pore canals, enabling the end surfaces of the steel pipes 2 to be flush with the butt joint end surfaces of the beam sections, and simultaneously embedding a plurality of horizontally distributed reinforcing steel bars 3 extending out of enough anchoring length at the second end of each beam section;
b2: transporting a plurality of beam sections to a construction site, and splicing the sections;
b3: injecting first glue into the steel pipes 2 of the first beam section 11;
b4: the end surfaces of the first end and the second end of the beam section are joint sections, and second glue is smeared on the joint sections of the first end of the beam section;
b5: respectively inserting a plurality of horizontally distributed steel bars 3 of the second beam section 12 into a plurality of steel pipes 2 of the first beam section 11, so that the first beam section 11 and the second beam section 12 are spliced;
b6: referring to steps B3 to B5, the splicing of the third beam segment to the second beam segment 12 and the splicing of the fourth beam segment to the third beam segment are continuously completed until the segment assembly is completed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope and the implementation manner of the present invention.
The present invention also has the following embodiments in addition to the above:
in an embodiment of the present invention, the construction method may further include:
a8: and tensioning the temporary prestress to ensure that a certain amount of compressive stress exists in the joint section of two adjacent beam sections.
In one embodiment, the outer ends of two beam segments at both ends of the segment beam 1 are not connected with the horizontal distribution steel bars 3.
In one embodiment, each horizontally distributed reinforcement 3 is located entirely within two adjacent beam segments.
In one embodiment, the openings are all horizontally opened along the extending direction of the beam segment, so that all the steel pipes 2 are horizontally arranged along the extending direction of the beam segment.
In one embodiment, a plurality of horizontally distributed reinforcing bars 3 are arranged in a vertical direction, or,
a plurality of horizontally distributed reinforcing bars 3 are arranged in the horizontal direction, or,
the plurality of horizontally distributed reinforcing steel bars 3 are arranged in the vertical direction and are also arranged in the horizontal direction.
In one embodiment, each beam segment is rectangular, box-shaped, T-shaped, or i-shaped in cross-section.
In this embodiment, first glue adopts the glue that reinforcing bar and steel pipe can bond, and the second glue adopts the glue that concrete and concrete can bond.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (3)

1. A construction method for a segmental beam additionally provided with steel pipes and horizontally distributed steel bars is characterized by comprising the following steps:
a1: prefabricating a plurality of beam sections, reserving a plurality of pore channels with enough anchoring length at two ends of each beam section, and installing steel pipes in the pore channels to enable the end surfaces of the steel pipes to be flush with the butt joint end surfaces of the beam sections;
a2: conveying a plurality of beam sections to a construction site, and assembling the sections;
a3: injecting first glue into the steel pipes at the second end of the first beam section;
a4: inserting first ends of a plurality of horizontally distributed reinforcing steel bars into a plurality of steel pipes at the second end of the first beam section respectively, and wiping off the first glue extruded by the horizontally distributed reinforcing steel bars;
a5: the end face of the second end of the first beam section is a joint section, and second glue is smeared on the joint section of the first beam section;
a6: injecting first glue into the steel pipe at the first end of the second beam section, and respectively inserting the second ends of the horizontally distributed steel bars inserted into the first beam section into the steel pipe at the first end of the second beam section, so as to finish the splicing of the second ends of the first beam section and the first end of the second beam section;
a7: with reference to steps A3 to a6, continuing to splice the second end of the second beam segment with the first end of the third beam segment and the second end of the third beam segment with the first end of the fourth beam segment until the segments are completely spliced;
a8: tensioning the temporary prestress to enable the joint section of two adjacent beam sections to have compressive stress;
each horizontal distribution steel bar is completely positioned inside two adjacent beam sections;
the pore channels are all horizontally arranged along the extending direction of the beam sections;
the plurality of horizontally distributed reinforcing steel bars are arranged along the vertical direction, or the plurality of horizontally distributed reinforcing steel bars are arranged along the horizontal direction while being arranged along the vertical direction;
the added horizontal distribution steel bars can increase the bending resistance and the shearing resistance at the joints of the segmental beams.
2. The construction method of the segmental beam additionally provided with the steel pipes and the horizontally distributed steel bars according to claim 1, wherein the outer ends of two beam segments positioned at the two ends of the segmental beam are not connected with the horizontally distributed steel bars.
3. The method as claimed in claim 1, wherein each of the beam sections has a cross-section of a rectangular shape, a box shape, a T shape or an i shape.
CN201811384541.3A 2018-11-20 2018-11-20 Construction method for segment beam additionally provided with steel pipe and horizontally distributed steel bars Active CN109629421B (en)

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CN109610321A (en) * 2018-11-22 2019-04-12 安徽省交通规划设计研究总院股份有限公司 A kind of subsection beam construction method for adding horizontal distribution reinforcing bar
CN110359362A (en) * 2019-07-10 2019-10-22 江苏镇江路桥工程有限公司 A kind of prefabricated bent cap of modularization and its construction technology
CN110373987A (en) * 2019-07-24 2019-10-25 重庆交通建设(集团)有限责任公司 A kind of box beam fast installs composite structure and its installation method
CN110820532A (en) * 2019-10-18 2020-02-21 同济大学 Design implementation method of beam type bridge girder structure capable of being repeatedly disassembled and assembled

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KR101177342B1 (en) * 2010-11-26 2012-08-30 한국건설기술연구원 Precast end segmet girder for continuous bridge, girder making method and bridge construction method using the same
CN202672356U (en) * 2012-07-03 2013-01-16 山东科技大学 Rabbet connection node of precast reinforced concrete beam and beam-column joint
CN103452327B (en) * 2013-08-30 2016-05-11 山西四建集团有限公司 Constructional column bar planting positioning construction method
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