CN111608087B - Method for accurately installing and positioning first-segment arch rib of steel pipe arch rib - Google Patents
Method for accurately installing and positioning first-segment arch rib of steel pipe arch rib Download PDFInfo
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- CN111608087B CN111608087B CN202010498610.4A CN202010498610A CN111608087B CN 111608087 B CN111608087 B CN 111608087B CN 202010498610 A CN202010498610 A CN 202010498610A CN 111608087 B CN111608087 B CN 111608087B
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- steel plate
- hinged support
- arch rib
- embedded steel
- segment
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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
- E01D4/00—Arch-type 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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge construction, in particular to a method for accurately installing and positioning a first-section arch rib of a steel pipe arch rib.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of bridge construction, in particular to a method for accurately installing and positioning a first-section arch rib of a steel pipe arch rib.
[ background of the invention ]
First segment arch rib installation accuracy receives the influence of pre-buried steel sheet, the free bearing and the hinge influence of contact between the hinge three to a great extent, among the prior art, pre-buried steel sheet produces the deformation easily in the installation, and the free bearing adopts the installation of "non-activity" connected mode of complete weld with pre-buried steel sheet, and the free bearing is welded fastening earlier back on pre-buried steel sheet promptly, and on installing the hinge of first segment arch rib again, when leading to follow-up first segment arch rib elevation of regulation and axis, the hinge adjustment degree of difficulty is big. The positioning precision requirement of the hinged support in the 'non-movable' connection mode is high, errors generated by the installation of the hinged support can cause errors generated by the installation of the first-section arch rib, the errors generated by the installation of the first-section arch rib can be linearly increased in subsequent hoisting, the overall errors of the subsequent-section arch rib hoisting are large, the ideal effect of fine adjustment is difficult to achieve, and the closure of the arch ribs is influenced.
[ summary of the invention ]
In view of the above, the invention provides a method for accurately installing and positioning the first segment of the arch rib of the steel pipe arch rib, which can simply and accurately adjust the hinge shaft and effectively adjust the installation accuracy of the first segment of the arch rib until the elevation and the axis meet the control requirements.
The technical scheme adopted by the invention is as follows: a method for accurately installing and positioning a first segment arch rib of a steel pipe arch rib comprises the following steps:
(1) installing an embedded steel plate: the width of the embedded steel plate is wider than the size of the hinged support, anchoring steel bars are welded on the lower surface of the embedded steel plate, the embedded steel plate is installed when the arch support is poured, the embedded steel plate is installed on the arch support, the anchoring steel bars are fixed in the arch support through concrete pouring, and flatness detection is carried out in the processing and installing processes of the embedded steel plate, so that good flatness of the embedded steel plate before and after welding of the anchoring steel bars and before and after concrete pouring is ensured;
(2) and (3) hinge seat installation: measuring the mounting position of a line-drawing positioning hinged support on the upper surface of an embedded steel plate, welding a positioning plate on the upper surface of the embedded steel plate for positioning the mounting position of the hinged support, then mounting the hinged support on the upper surface of the embedded steel plate by adopting a working cable or a crane, synchronously controlling the horizontal mounting precision by using a level instrument and a total station, and welding a hinged support limiting plate on the upper surface of the embedded steel plate for limiting the hinged support after the hinged support is mounted and positioned;
(3) installing a first segment arch rib: after the first-section arch rib is lifted, the first-section arch rib is lifted by a cable crane to be basically in place, a hinge shaft of the first-section arch rib is preliminarily mounted in place to a hinge base, a hinge shaft limiting plate is welded on the hinge base to limit the end face of the hinge shaft of the first-section arch rib, the axis and the elevation of the first-section arch rib are observed, cable wind and a buckle cable on the side of the arch rib are adjusted to be tensioned in a grading manner, the axis and the elevation of the first-section arch rib are accurately adjusted, and the axis and the elevation of the first-section arch rib meet the requirements;
(4) adjusting the free bearing: confirming a place with a gap between the hinged shaft and the hinged support, welding an adjusting steel plate on the hinged support outside the gap, then jacking a jack between the adjusting steel plate and the pre-buried steel plate, cutting hinged support limiting plates on two sides of the jack by using a cutting machine, removing the limit of the jack on the vertical direction of the hinged support, starting the jack to adjust the hinged support, enabling the hinged support and the hinged shaft to be closely attached, filling and fixing a local gap between the hinged support and the pre-buried steel plate by spot welding, and synchronously retesting the axial line and the elevation of the arch rib;
(5) pouring epoxy resin mortar: and welding the hinged support and the embedded steel plate after the hinged support is adjusted in place, leaving exhaust holes on the left side and the right side, leaving grouting holes on the upper part, pouring epoxy resin mortar into a gap between the embedded steel plate and the hinged support, and filling tightly to finish the installation of the arch rib of the first section.
Further, in the step (1), before the embedded steel plate is installed, the section steel is respectively spot-welded on the inner side and the outer side of the lower surface of the embedded steel plate for stiffening treatment, so that the embedded steel plate is prevented from being protruded and deformed when the arch support concrete is poured.
Further, in the step (4), the jack adopts a screw jack, a rocker of the jack is connected into a ring beside the jack, the jack is jacked by rotating a lifting sleeve of the jack in a hand-cranking mode to push the jack, and jacking force is transmitted to the hinged support until the hinged support is attached to the hinged shaft.
Further, in the step (4), after the hinge base is closely attached to the hinge shaft, the wedge-shaped steel block is used for filling a local gap between the hinge base and the embedded steel plate, and the wedge-shaped steel block is welded to the hinge base and the embedded steel plate.
Further, in the step (3), observing the axial line of the first segment of the arch rib by using a total station and a marker post arranged on the outer sides of the upper chord tube and the lower chord tube of the arch rib.
Further, in the step (3), observing the first-section arch rib elevation by using a total station after installing the prism on the upper chord tube.
Further, in the step (1), the width of the blanking of the embedded steel plate is at least 10cm larger than the size of the hinged support.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the method for accurately installing and positioning the first-section arch rib of the steel pipe arch rib is completed by five steps of pre-buried steel plate installation, hinged support installation, first-section arch rib installation, hinged support adjustment and epoxy resin mortar pouring; the size of the embedded steel plate is larger than that of the hinged support so as to facilitate the welding of the positioning plate of the hinged support and the limiting plate; controlling the installation precision of the hinged support in the horizontal direction by using a level meter and a total station, and welding the hinged support limiting plate for fixation; hoisting the arch rib of the first section by using a cable in a primary in-place manner, and accurately adjusting the axis and the elevation of the arch rib of the first section by using the lateral cable wind of the arch rib and the tensioning of a buckle cable so as to enable the axis and the elevation of the arch rib of the first section to meet the requirements; after the positioning is accurate, the jack is used for adjusting the hinged support to be closely attached to the hinged shaft, the hinged support supports the hinged shaft, the hinged support and the embedded steel plate are welded, a grouting hole and an exhaust hole are reserved, epoxy resin mortar is immediately poured after welding is completed, filling is dense, and the hinged support is firmly supported on the embedded steel plate. According to the method for accurately installing and positioning the first-section arch rib of the steel pipe arch rib, the axis and the elevation of the first-section arch rib are accurately adjusted through the tensioning of the cable wind and the buckle cable on the side of the arch rib, the hinged support is adjusted through the jack after the axis and the elevation of the first-section arch rib meet requirements, the hinged support is closely attached to the hinged shaft, the adjustment of the elevation and the axis of the first-section arch rib is convenient and accurate, the requirement on the positioning accuracy of the hinged support is low, and the influence of the error of the hinged support on the installation accuracy of the first-section arch rib is small.
[ description of the drawings ]
FIG. 1 is a flow chart of a method for accurately installing and positioning a first section of a steel pipe arch rib according to the invention;
FIG. 2 is a schematic view of the precise installation of the nose segment of a steel tube rib of the present invention;
the method comprises the following steps of 1-pre-buried steel plate, 2-hinged support, 3-first-section arch rib, 4-positioning plate, 5-hinged support limiting plate, 6-hinged shaft, 7-hinged shaft limiting plate, 8-adjusting steel plate and 9-jack.
[ detailed description ] embodiments
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1 and 2, a method for accurately installing a head segment arch rib of a steel pipe arch rib in place comprises the following steps:
(1) installing an embedded steel plate 1: the size of the embedded steel plate 1 is at least 10cm wider than that of the hinged support 2, anchoring steel bars are welded on the lower surface of the embedded steel plate 1, spot-welding section steel is respectively carried out on the inner side and the outer side of the lower surface of the embedded steel plate 1 for stiffening treatment, when arch center concrete is poured, the embedded steel plate 1 is protruded and deformed, the embedded steel plate 1 is installed when the arch center is poured, the embedded steel plate 1 is installed on the upper end surface of the arch center, the anchoring steel bars and the section steel are fixed in the arch center by concrete pouring, 2m straight rulers are adopted in the processing and installing processes of the embedded steel plate 1 for flatness detection, the flatness of the embedded steel plate 1 before and after the anchoring steel bars are welded and before and after the concrete pouring is ensured to be good, and the flatness of the embedded steel plate 1 is measured again after the embedded steel plate 1 is installed in place;
(2) and (3) installing a hinged support 2: the method comprises the steps of marking the mounting position of a positioning hinged support 2 by measuring the upper surface of an embedded steel plate 1, welding a positioning plate 4 at the periphery of the mounting position of the hinged support 2 of the embedded steel plate 1 for positioning the mounting position of the hinged support 2, then mounting the hinged support 2 on the well-positioned mounting position of the upper surface of the embedded steel plate 1 by adopting a working cable or a crane, synchronously controlling the mounting precision of the hinged support in the horizontal direction by using a level instrument and a total station, limiting the hinged support 2 in the horizontal direction and the vertical direction by welding a hinged support limiting plate 5 after the hinged support 2 is mounted and positioned, and arranging the number of the hinged support limiting plates 5 according to actual needs;
(3) the first segment arch rib 3 is installed: after the first-segment arch rib 3 is lifted, the first-segment arch rib 3 is lifted by a cable crane to be basically in place, after a hinge shaft 6 of the first-segment arch rib 3 is preliminarily installed in place to a hinge base 2, a hinge shaft limiting plate 7 is welded on the hinge base 2 to limit the end surface of the hinge shaft 6 of the first-segment arch rib 3, the axis and the elevation of the first-segment arch rib 3 are observed, cable wind and a buckle cable on the side of the arch rib are adjusted to be tensioned in a grading manner, the axis and the elevation of the first-segment arch rib 3 are accurately adjusted, and the axis and the elevation of the first-segment arch rib 3 meet requirements;
(3) installing a first segment arch rib 3; after a first segment of arch rib 3 is lifted, the first segment of arch rib is lifted by a cable crane to be basically in place, after a hinge shaft 6 of the first segment of arch rib 3 is initially in place, a hinge shaft limiting plate 7 is welded to limit the end surface of the hinge shaft 6 of the first segment of arch rib 3, the axis of the first segment of arch rib 3 is observed by using a total station and a marker post arranged on the outer sides of upper and lower chord tubes of the arch rib, the elevation of the first segment of arch rib 3 is observed by using a prism arranged on the upper chord tube and the total station, and the axis and the elevation of the first segment of arch rib 3 are accurately adjusted by adjusting cable wind and a buckle cable on the side of the arch rib in a grading and tensioning manner, so that the axis and the elevation of the first segment of arch rib 3 meet the requirements;
(4) and (3) adjusting the free bearing 2: confirming a place with a gap between a hinged shaft 6 and a hinged support 2, welding an adjusting steel plate 8 on the hinged support 2 outside the gap, then jacking a jack 9 between the adjusting steel plate 8 and an embedded steel plate 1, cutting hinged support limiting plates 5 on two sides of the jack 9 by using a cutting machine, removing the limit of the jack on the hinged support 2 in the vertical direction, starting the jack 9 to jack the hinged support 2, enabling the hinged support 2 to be closely attached to the hinged shaft 6, then repeatedly measuring the deviation of the axis of an arch rib, filling a local gap between the hinged support 2 and the embedded steel plate 1 with a wedge-shaped steel block after the axis of the arch rib meets the requirement, welding the wedge-shaped steel block on the hinged support 2 and the embedded steel plate 1, and synchronously repeatedly measuring the axis and the elevation of the arch rib;
the jack 9 adopts a screw jack, and the using method comprises the following steps: connecting a rocker of the jack 9 to a ring beside the jack 9, manually rotating the rocker of the jack 9, pushing a lifting sleeve of the jack 9 to lift the jack 9, transmitting the jacking force to the hinged support 2 and lifting the hinged support 2, and stopping rotating the rocker of the jack 9 until the hinged support 2 is attached to the hinged shaft 6.
(5) Pouring epoxy resin mortar: after the hinged support 2 is adjusted in place, the edge of the hinged support 2 is welded and fixed to the embedded steel plate 1, a plurality of exhaust holes are reserved in the left welding seam and the right welding seam, a plurality of grouting holes are reserved in the front welding seam and the rear welding seam, epoxy resin mortar is poured into a gap between the embedded steel plate 1 and the hinged support 2 from the grouting holes, the gap between the embedded steel plate 1 and the hinged support 2 is filled, and the installation of the first-segment arch rib 3 is completed. If the epoxy resin mortar cannot be timely poured in the same day, a plurality of drain holes need to be reserved at the lower part of the welding line.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (7)
1. A method for accurately installing and positioning a first segment arch rib of a steel pipe arch rib is characterized by comprising the following steps: the method comprises the following steps:
(1) installing an embedded steel plate: the width of the embedded steel plate is wider than the size of the hinged support, anchoring steel bars are welded on the lower surface of the embedded steel plate, the embedded steel plate is installed when the arch support is poured, the embedded steel plate is installed on the arch support, the anchoring steel bars are fixed in the arch support through concrete pouring, and flatness detection is carried out in the processing and installing processes of the embedded steel plate, so that good flatness of the embedded steel plate before and after welding of the anchoring steel bars and before and after concrete pouring is ensured;
(2) and (3) hinge seat installation: measuring the mounting position of a line-drawing positioning hinged support on the upper surface of an embedded steel plate, welding a positioning plate on the upper surface of the embedded steel plate for positioning the mounting position of the hinged support, then mounting the hinged support on the upper surface of the embedded steel plate by adopting a working cable or a crane, synchronously controlling the horizontal mounting precision by using a level instrument and a total station, and welding a hinged support limiting plate on the upper surface of the embedded steel plate for limiting the hinged support after the hinged support is mounted and positioned;
(3) installing a first segment arch rib: after the first-section arch rib is lifted, the first-section arch rib is lifted by a cable crane to be basically in place, a hinge shaft of the first-section arch rib is preliminarily mounted in place to a hinge base, a hinge shaft limiting plate is welded on the hinge base to limit the end face of the hinge shaft of the first-section arch rib, the axis and the elevation of the first-section arch rib are observed, cable wind and a buckle cable on the side of the arch rib are adjusted to be tensioned in a grading manner, the axis and the elevation of the first-section arch rib are accurately adjusted, and the axis and the elevation of the first-section arch rib meet the requirements;
(4) adjusting the free bearing: confirming a place with a gap between the hinged shaft and the hinged support, welding an adjusting steel plate on the hinged support outside the gap, then jacking a jack between the adjusting steel plate and the pre-buried steel plate, cutting hinged support limiting plates on two sides of the jack by using a cutting machine, removing the limit of the jack on the vertical direction of the hinged support, starting the jack to adjust the hinged support, enabling the hinged support and the hinged shaft to be closely attached, filling and fixing a local gap between the hinged support and the pre-buried steel plate by spot welding, and synchronously retesting the axial line and the elevation of the arch rib;
(5) pouring epoxy resin mortar: and welding the hinged support and the embedded steel plate after the hinged support is adjusted in place, leaving exhaust holes on the left side and the right side, leaving grouting holes on the upper part, pouring epoxy resin mortar into a gap between the embedded steel plate and the hinged support, and filling tightly to finish the installation of the arch rib of the first section.
2. A method of accurately installing a first segment of a steel tube rib in place as claimed in claim 1, wherein: in the step (1), before the embedded steel plate is installed, the profile steel is respectively spot-welded on the inner side and the outer side of the lower surface of the embedded steel plate for stiffening treatment, so that the embedded steel plate is prevented from being protruded and deformed when the arch support concrete is poured.
3. A method of accurately installing a first segment of a steel tube rib in place as claimed in claim 1, wherein: and (4) connecting a rocker of the jack to a side circular ring of the jack by using a screw jack, manually rotating a lifting sleeve of the jack to lift the jack, and transmitting the jacking force to the hinged support until the hinged support is attached to the hinged shaft.
4. A method of accurately installing a first segment of a steel tube rib in place as claimed in claim 1, wherein: and (4) after the joint of the hinged support and the hinged shaft is tightly attached, filling a local gap between the hinged support and the embedded steel plate with a wedge-shaped steel block, and welding the wedge-shaped steel block to the hinged support and the embedded steel plate.
5. A method of accurately installing a first segment of a steel tube rib in place as claimed in claim 1, wherein: and (3) observing the axis of the first segment of the arch rib by using a total station and the marker posts arranged on the outer sides of the upper chord tube and the lower chord tube of the arch rib.
6. A method of accurately installing a first segment of a steel tube rib in place as claimed in claim 1, wherein: and (3) observing the first-section arch rib elevation by using a total station after a prism is installed on the upper chord tube.
7. A method of accurately installing a first segment of a steel tube rib in place as claimed in claim 1, wherein: in the step (1), the width of the pre-buried steel plate is at least 10cm larger than the size of the hinged support when the pre-buried steel plate is blanked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498610.4A CN111608087B (en) | 2020-06-04 | 2020-06-04 | Method for accurately installing and positioning first-segment arch rib of steel pipe arch rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498610.4A CN111608087B (en) | 2020-06-04 | 2020-06-04 | Method for accurately installing and positioning first-segment arch rib of steel pipe arch rib |
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| CN111608087A CN111608087A (en) | 2020-09-01 |
| CN111608087B true CN111608087B (en) | 2021-08-24 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100989811B1 (en) * | 2010-02-23 | 2010-10-29 | 노윤근 | Prestressed concrete slab bridge which increased in the efficiency by large decenterizing concrete block and an arch rib |
| CN102373672B (en) * | 2010-08-26 | 2013-08-21 | 中铁工程设计咨询集团有限公司 | Vertical rotating hinge system for arch rib structure |
| CN206346116U (en) * | 2016-10-18 | 2017-07-21 | 中铁大桥局集团第五工程有限公司 | A kind of skewback embedded anchor bar alignment system |
| CN108660903A (en) * | 2018-06-20 | 2018-10-16 | 安徽省交通建设股份有限公司 | CFST Arch Bridge and construction method |
| CN109914260A (en) * | 2019-04-09 | 2019-06-21 | 中铁十八局集团第二工程有限公司 | Four, double ribs encircle vaulted beam method without steel truss is twisted |
| CN110593076B (en) * | 2019-09-29 | 2021-05-28 | 广西路桥工程集团有限公司 | Steel pipe concrete tied arch bridge hunch seat horizontal displacement monitoring and control system |
| CN110593085B (en) * | 2019-10-24 | 2020-11-10 | 中国电建集团成都勘测设计研究院有限公司 | Method for mounting steel pipes of lattice pier of bridge steel pipe |
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