CN103469732A - Construction method of preformed holes for foundation bolts of bridge support - Google Patents

Construction method of preformed holes for foundation bolts of bridge support Download PDF

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Publication number
CN103469732A
CN103469732A CN201310432049XA CN201310432049A CN103469732A CN 103469732 A CN103469732 A CN 103469732A CN 201310432049X A CN201310432049X A CN 201310432049XA CN 201310432049 A CN201310432049 A CN 201310432049A CN 103469732 A CN103469732 A CN 103469732A
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China
Prior art keywords
skeleton
steel bushing
cap
annulus
pier
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CN201310432049XA
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CN103469732B (en
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彭超
程建军
马磊
全有维
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Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
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Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
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Abstract

The invention discloses a construction method of preformed holes for foundation bolts of a bridge support. The construction method comprises the following steps: (1) determining positions of the preformed holes in a capping beam or an abutment to be cast and reserving preformed hole gaps; (2) determining the positions of the centers of the preformed holes for the foundation bolts of the support opposite to a top reinforcement of the capping beam or the abutment; (3) manufacturing a steel sleeve; (4) manufacturing a fixed framework; (5) mounting the fixed framework above the reinforcement layer of the capping beam or the abutment to be cast; (6) inserting the steel sleeve in a circular ring of the fixed framework; (7) casting concrete, performing final setting, drawing the steel sleeve out, and removing or retaining the fixed framework; (8) binding support pad stone reinforcement meshes by reserved support pad stone longitudinal bars, inserting the steel sleeve for the second time, and casting support pad stone concrete. The construction method has the advantages that (1) the method has fewer processes and is easy to operate, (2) the steel sleeve can be repeatedly used, (3) the mounting positions of the reserved holes for the foundation bolts of the support are accurate and small in deviation, and (4) the surfaces of the holes are rough, the adhesion is good and the later-stage grouting compactness is high after the steel sleeve is drawn out.

Description

A kind of job practices of bridge pad anchor bolt box
Technical field
The present invention relates to a kind of job practices of bridge pad anchor bolt box, belong to technical field of bridge engineering.
Background technology
In bridge construction; bearing is the tie point of bridge upper and lower part structure; its effect is the load of superstructure to be delivered to the bridge pier platform pleasantly, safely get on; guarantee the Free Transform of superstructure under the factor effects such as load, variations in temperature, concrete shrinkage simultaneously; in order to make the actual loading situation of structure meet rated figure, and protection beam-ends, pier cap is injury-free.How in work progress, guaranteeing that the bearing installation site is accurate, make it stressed evenly, prevent eccentric excessively and damage, is the problem that must consider and solve in construction.
Before bearing is installed, must carry out the reserved of bearing anchor (bolt) hole.The tradition construction technology is to adopt pre-buried PVC plastic pipe or round log, according to bearing producer, provides stone bolt diameter, length and preformed hole diameter to be constructed.PVC plastic pipe end opening is shut, and makes its not spillage, outstanding cap top side location 10cm suitable for reading, and use active cover sealing, pipe shaft to be fixed on cap or pier reinforcing bar to make it unshift in the concreting process.At present, this kind of technique is used on a large scale because method is easy, but still exists some not enough, and the one, pvc pipe and pier shaft reinforcing bar lack effective fixation, in concrete vibrates process, the pvc pipe displacement easily occurs or damage; The 2nd, the pvc pipe mode pre-buried according to single tube constructed, if one of them pvc pipe generation off normal phenomenon need to be carried out the later stage and be punchinged, can make the bearing normal mounting; The 3rd, the pvc pipe tube wall is smooth, after stone bolt is embedding, adopts the epoxy resin mortar joint filling, and bond effect is undesirable.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, a kind of job practices of bridge pad anchor bolt box is provided, the method operation is few, simple to operate, utilization ratio of device is high, and the preformed hole position is accurate, deviation is little, and the hole rough surface, caking property is good, and the later stage Grouted density is high.
Technical scheme: the job practices of a kind of bridge pad anchor bolt box of the present invention comprises the steps:
(1) according to design and bearing manufacturer, require to determine the position that preformed hole is arranged in cap to be built or pier, then the reinforcing bar of colligation cap to be built or pier, stay the hole to be provided gap;
(2), after the reinforcing bar binding of building cap or pier and side form install end, adopt total powerstation to determine the relative cap in center of bearing anchor bolt box or the position of pier top reinforcement;
(3) make steel bushing, the external diameter of described steel bushing equals the internal diameter of preformed hole, the length of described steel bushing is greater than the degree of depth of preformed hole and the thickness sum of bearing pad stone, and the two-port of described steel bushing seals by Plate Welding, on the sidewall of a port of described steel bushing, is fixed with draw ring;
(4) make fixedly skeleton according to the bearing specifications and models, described fixedly skeleton consists of the upper skeleton sheet be parallel to each other and lower skeleton sheet, described upper skeleton sheet be positioned at the lower skeleton sheet directly over, between described upper and lower matrix tablet, by stud, be fixedly connected with, the height of described fixedly skeleton is less than the degree of depth poor of the length of steel bushing and preformed hole, described matrix tablet comprises four equal diameter annulus, four isometric limit muscle and four isometric diagonal angle muscle, the internal diameter of described annulus equals the internal diameter of preformed hole, described annulus and limit muscle alternately are connected to form square structure, described annulus and limit muscle are positioned at same plane, between two pairs of annulus at described square structure diagonal angle, by the diagonal angle muscle, connect, described diagonal angle muscle is fixed in each both sides to annulus,
(5) fixedly skeleton is installed on the upper surface of the bottom surface of the top of steel bar layer of cap to be built or pier and described fixedly skeleton higher than cap or pier; At first, adopt the fixedly plan-position of skeleton of the plummet collimation method location positioning definite with step (two) in two above circle ring center positions, the both sides of described fixedly skeleton are fixed on screw-thread steel, the two ends of described screw-thread steel are fixed on side form, finally, in the vertical muscle of the reserved bearing pad stone in the position of fixing skeleton surrounding;
(6) according to manufacturer's requirement, determine that steel bushing inserts the degree of depth of cap to be built or pier, steel bushing to be inserted in the annulus of fixing skeleton, spot welding is fixed;
(7) check relevant built-in fitting, build concrete, after concrete final set, extract steel bushing out, remove or retain fixedly skeleton;
(8) after the form removable of cap or pier, by the vertical muscle of reserved bearing pad stone, colligation bearing pad stone reinforced mesh, secondary inserts steel bushing, builds the bearing pad stone concrete, controls the pinner absolute altitude, extract steel bushing out after concrete final set, the construction of bridge pad anchor bolt box is complete thus.
Further, treat that fixedly skeleton recycles finally, retain fixedly skeleton in described step (seven), as the embedded bar of bearing pad stone.
In described step (two), adopt bar dowel to be welded on the top reinforcement of cap to be built or pier, then smear the sign of red paint as the preformed hole center.
Annulus in described step (four), Jin Ji diagonal angle, limit muscle all adopt the reinforcement fabrication of diameter 10mm to form, and between described annulus and Jin, diagonal angle, limit muscle, spot welding is fixedly connected with.
Steel bushing in described step (three) adopts wall thickness 2mm steel pipe manufacturing to form.
In described step (eight), the distance of the upper port of steel bushing and bearing pad stone upper surface is more than or equal to 10cm.
Compared with prior art, its beneficial effect is in the present invention: the job practices of bridge pad anchor bolt box of the present invention, and 1. operation is few, simple to operate; 2. install reusablely, utilization rate is high; 3. fixedly skeleton integral body is fixed-type, and bearing anchor bolt box installation site is accurate, and deviation is little; 4. after steel bushing is extracted out, the hole rough surface, caking property is good, and the later stage Grouted density is high.
The accompanying drawing explanation
The structural representation that Fig. 1 is the described fixedly skeleton of embodiment 1.
Fig. 2 is that in embodiment 1, steel bushing is installed on the schematic diagram in fixing skeleton.
In figure: 1, upper skeleton sheet; 2, lower skeleton sheet; 3, stud; 4, annulus; 5, limit muscle; 6, diagonal angle muscle; 7, steel bushing; 8, draw ring.
The specific embodiment
Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:a kind of job practices of bridge pad anchor bolt box, comprise the steps:
(1) according to design and bearing manufacturer, require to determine the position that preformed hole is arranged in cap to be cast, then colligation cap reinforcing bar, stay the hole to be provided gap;
(2), after reinforcing bar binding and cap side form install end, adopt total powerstation to determine the position of the relative cap top reinforcement in center of bearing anchor bolt box; Be welded on bar dowel on the top reinforcement of cap to be built, then smear the sign of red paint as the preformed hole center.
(3) make steel bushing, described steel bushing adopts wall thickness 2mm steel pipe manufacturing to form, its external diameter equals the internal diameter of preformed hole, length is greater than the degree of depth of preformed hole and the thickness sum of bearing pad stone, the Plate Welding sealing that the two-port of described steel bushing is thick by 3mm, be fixed with draw ring on the sidewall of a port of described steel bushing;
(4) make fixedly skeleton according to the bearing specifications and models, described fixedly skeleton consists of the upper skeleton sheet be parallel to each other and lower skeleton sheet, described upper skeleton sheet be positioned at the lower skeleton sheet directly over, between described upper and lower matrix tablet, by stud, be fixedly connected with, the height of described fixedly skeleton is less than the degree of depth poor of the length of steel bushing and preformed hole, described matrix tablet comprises four equal diameter annulus, four isometric limit muscle and four isometric diagonal angle muscle, the internal diameter of described annulus equals the internal diameter of preformed hole, described annulus and limit muscle alternately are connected to form square structure, described annulus and limit muscle are positioned at same plane, between two pairs of annulus at described square structure diagonal angle, by the diagonal angle muscle, connect, described diagonal angle muscle is fixed in each both sides to annulus, refer to accompanying drawing 1, wherein, annulus, limit Jin, diagonal angle muscle and stud all adopt the reinforcement fabrication of diameter 10mm to form, and between described annulus, limit Jin, diagonal angle muscle and stud, spot welding is fixedly connected with.
(5) fixedly skeleton is installed on the upper surface of the bottom surface of the top of steel bar layer of cap to be built and described fixedly skeleton higher than cap; At first, adopt the fixedly plan-position of skeleton of the plummet collimation method location positioning definite with step (two) in two above circle ring center positions, the both sides of described fixedly skeleton are fixed on screw-thread steel, the two-end-point solid welding of described screw-thread steel is on the cap side form, prevent the skeleton slippage, finally, in the vertical muscle of the reserved bearing pad stone in the position of fixing skeleton surrounding;
(6) according to manufacturer's requirement, determine that steel bushing inserts the degree of depth of cap to be built, steel bushing is inserted to the fixedly annulus mid point solid welding of skeleton and determine, refer to accompanying drawing 2;
(7) check relevant built-in fitting, build fine strain of millet body concrete, after concrete final set, extract steel bushing out, remove fixedly skeleton;
(8) after fine strain of millet phantom plate is removed, by the vertical muscle of reserved bearing pad stone, colligation bearing pad stone reinforced mesh, secondary inserts steel bushing, the distance of the upper port of steel bushing and bearing pad stone upper surface is more than or equal to 10cm, builds the bearing pad stone concrete, controls the pinner absolute altitude, extract steel bushing out after concrete final set, the construction of bridge pad anchor bolt box is complete thus.
Treat that fixedly skeleton recycles finally, retain fixedly skeleton in described step (seven), as the embedded bar of bearing pad stone.
As mentioned above, although meaned and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.

Claims (6)

1. the job practices of a bridge pad anchor bolt box, is characterized in that, comprises the steps:
(1) according to design and bearing manufacturer, require to determine the position that preformed hole is arranged in cap to be built or pier, then the reinforcing bar of colligation cap to be built or pier, stay the hole to be provided gap;
(2), after the reinforcing bar binding of building cap or pier and side form install end, adopt total powerstation to determine the relative cap in center of bearing anchor bolt box or the position of pier top reinforcement;
(3) make steel bushing, the external diameter of described steel bushing equals the internal diameter of preformed hole, the length of described steel bushing is greater than the degree of depth of preformed hole and the thickness sum of bearing pad stone, and the two-port of described steel bushing seals by Plate Welding, on the sidewall of a port of described steel bushing, is fixed with draw ring;
(4) make fixedly skeleton according to the bearing specifications and models, described fixedly skeleton consists of the upper skeleton sheet be parallel to each other and lower skeleton sheet, described upper skeleton sheet be positioned at the lower skeleton sheet directly over, between described upper and lower matrix tablet, by stud, be fixedly connected with, the height of described fixedly skeleton is less than the degree of depth poor of the length of steel bushing and preformed hole, described matrix tablet comprises four equal diameter annulus, four isometric limit muscle and four isometric diagonal angle muscle, the internal diameter of described annulus equals the internal diameter of preformed hole, described annulus and limit muscle alternately are connected to form square structure, described annulus and limit muscle are positioned at same plane, between two pairs of annulus at described square structure diagonal angle, by the diagonal angle muscle, connect, described diagonal angle muscle is fixed in each both sides to annulus,
(5) fixedly skeleton is installed on the upper surface of the bottom surface of the top of steel bar layer of cap to be built or pier and described fixedly skeleton higher than cap or pier; At first, adopt the fixedly plan-position of skeleton of the plummet collimation method location positioning definite with step (two) in two above circle ring center positions, the both sides of described fixedly skeleton are fixed on screw-thread steel, the two ends of described screw-thread steel are fixed on side form, finally, in the vertical muscle of the reserved bearing pad stone in the position of fixing skeleton surrounding;
(6) according to manufacturer's requirement, determine that steel bushing inserts the degree of depth of cap to be built or pier, steel bushing to be inserted in the annulus of fixing skeleton, spot welding is fixed;
(7) check relevant built-in fitting, build concrete, after concrete final set, extract steel bushing out, remove or retain fixedly skeleton;
(8) after cap or pier form removable, by the vertical muscle of reserved bearing pad stone, colligation bearing pad stone reinforced mesh, secondary inserts steel bushing, builds the bearing pad stone concrete, controls the pinner absolute altitude, extract steel bushing out after concrete final set, the construction of bridge pad anchor bolt box is complete thus.
2. the job practices of a kind of bridge pad anchor bolt box according to claim 1, is characterized in that, retains fixedly skeleton in described step (seven), as the embedded bar of bearing pad stone.
3. the job practices of a kind of bridge pad anchor bolt box according to claim 1, it is characterized in that, in described step (two), adopt bar dowel to be welded on the top reinforcement of cap to be built or pier, then smear the sign of red paint as the preformed hole center.
4. the job practices of a kind of bridge pad anchor bolt box according to claim 1, it is characterized in that, annulus in described step (four), Jin Ji diagonal angle, limit muscle all adopt the reinforcement fabrication of diameter 10mm to form, and between described annulus and Jin, diagonal angle, limit muscle, spot welding is fixedly connected with.
5. the job practices of a kind of bridge pad anchor bolt box according to claim 1, is characterized in that, the steel bushing in described step (three) adopts wall thickness 2mm steel pipe manufacturing to form.
6. the job practices of a kind of bridge pad anchor bolt box according to claim 1, is characterized in that, in described step (eight), the distance of the upper port of steel bushing and bearing pad stone upper surface is more than or equal to 10cm.
CN201310432049.XA 2013-09-22 2013-09-22 Construction method of preformed holes for foundation bolts of bridge support Active CN103469732B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104404882A (en) * 2014-11-19 2015-03-11 中铁六局集团有限公司 Assistant mounting die for support and construction method thereof
CN105113408A (en) * 2015-09-25 2015-12-02 中铁第五勘察设计院集团有限公司 Bolt-steel sleeve-connecting finned plate coupling
CN110983994A (en) * 2019-12-02 2020-04-10 中铁四院集团岩土工程有限责任公司 Slotting method for bridge pier support base pad stone and construction method for bridge deviation correction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090001261A (en) * 2007-06-29 2009-01-08 (주)한맥기술 Prestressed concrete girder bridge having connecting structure using steel bar, and constructing method thereof
KR20090055063A (en) * 2007-11-28 2009-06-02 주식회사 코아이엔씨 Construction method of pre-stressed concrete beam
CN101476293A (en) * 2009-01-16 2009-07-08 广东省长大公路工程有限公司 Non-stand construction method for large bridge arch rib
CN101793006A (en) * 2009-12-23 2010-08-04 中铁大桥局集团第一工程有限公司 Construction method for rapid construction of support cast-in-situ continuous beam
CN102191750A (en) * 2010-03-10 2011-09-21 重庆交通大学 Construction method for waterproof isolation structure of anchor plate of cable-stayed bridge by adopting steel-concrete composite beam

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090001261A (en) * 2007-06-29 2009-01-08 (주)한맥기술 Prestressed concrete girder bridge having connecting structure using steel bar, and constructing method thereof
KR20090055063A (en) * 2007-11-28 2009-06-02 주식회사 코아이엔씨 Construction method of pre-stressed concrete beam
CN101476293A (en) * 2009-01-16 2009-07-08 广东省长大公路工程有限公司 Non-stand construction method for large bridge arch rib
CN101793006A (en) * 2009-12-23 2010-08-04 中铁大桥局集团第一工程有限公司 Construction method for rapid construction of support cast-in-situ continuous beam
CN102191750A (en) * 2010-03-10 2011-09-21 重庆交通大学 Construction method for waterproof isolation structure of anchor plate of cable-stayed bridge by adopting steel-concrete composite beam

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104404882A (en) * 2014-11-19 2015-03-11 中铁六局集团有限公司 Assistant mounting die for support and construction method thereof
CN104404882B (en) * 2014-11-19 2016-06-22 中铁六局集团有限公司 A kind of bearing auxiliary installation mold and construction method thereof
CN105113408A (en) * 2015-09-25 2015-12-02 中铁第五勘察设计院集团有限公司 Bolt-steel sleeve-connecting finned plate coupling
CN110983994A (en) * 2019-12-02 2020-04-10 中铁四院集团岩土工程有限责任公司 Slotting method for bridge pier support base pad stone and construction method for bridge deviation correction

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