CN109972520B - Construction method of prefabricated bridge deck installation structure - Google Patents
Construction method of prefabricated bridge deck installation structure Download PDFInfo
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- CN109972520B CN109972520B CN201910168572.3A CN201910168572A CN109972520B CN 109972520 B CN109972520 B CN 109972520B CN 201910168572 A CN201910168572 A CN 201910168572A CN 109972520 B CN109972520 B CN 109972520B
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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Abstract
The invention relates to a construction method of a prefabricated bridge deck installation structure, which comprises the following steps: 1) construction preparation; 2) preparing a component; 3) hoisting and positioning the prefabricated bridge deck; 4) mounting a cantilever end connecting structure; 5) grouting the middle joint; 6) grouting the seam of the cantilever end; 7) and constructing a guardrail foundation and guardrail columns. The invention has the beneficial effects that: the invention not only can improve the efficiency of the hoisting construction of the prefabricated bridge deck, but also can effectively reduce the damage of the hoisting construction to the prefabricated bridge deck and can realize the accurate installation and positioning of the prefabricated bridge deck; the prefabricated bridge deck slab has the advantages that the templates at the joints of the prefabricated bridge deck slab are convenient to arrange, the stability of the template structure is good, the templates are convenient to remove, the template supporting quality can be effectively improved, and the difficulty in removing the templates is reduced; the prefabricated bridge deck cantilever end connecting structure has high connecting strength and good integrity, and can effectively improve the durability of the structure on the basis of improving the bearing capacity and stability of the structure.
Description
Technical Field
The invention relates to a construction method of a prefabricated bridge deck installation structure, which can improve the field construction quality and the integrity of a construction structure, reduce the difficulty of template installation and positioning and improve the durability of a cantilever end connection structure, belongs to the field of bridge engineering and is suitable for prefabricated bridge deck installation engineering.
Background
With the rapid development of bridge engineering construction in China, the prefabricated bridge deck is widely applied with the advantages of high construction efficiency, good environmental protection effect and the like. However, in the installation and construction of the prefabricated bridge deck slab, the problems of poor stress performance of the joint, high installation and positioning difficulty and the like often exist, and the construction quality is seriously influenced.
There has been a bridge deck slab U shaped steel bar wet joint structure of exempting from die block among the prior art, including two prefabricated bridge deck boards, U-shaped reinforcing bar, longitudinal reinforcement, cast in situ concrete, leak protection reinforcing bar, the U-shaped reinforcing bar that U-shaped reinforcing bar is pre-buried in prefabricated bridge deck board, and the U-shaped reinforcing bar that stretches out from adjacent precast beam flange board is along the horizontal staggered arrangement of bridge deck board to penetrate longitudinal reinforcement at its flexion, there is the step in opposite face below level of two prefabricated bridge deck boards, and two prefabricated bridge deck boards are the V-arrangement recess in the vertical being in seam crossing side, the leak protection reinforcing bar sets up in the V-arrangement recess, the step forms closed bottom plate with the leak protection reinforcing bar, and cast in situ concrete is pour to the bottom plate top.
The construction technology improves the stress performance of the joint of the bridge deck slab to a certain degree, but the overall performance of the construction structure has a part which can be improved, and the construction technology does not relate to the precise positioning technology of the bridge deck slab. In view of this, the present invention is directed to a construction method of a prefabricated bridge deck installation structure, which can improve the field construction quality and the integrity of a construction structure, reduce the difficulty of installation and positioning of a bridge deck, and improve the durability of a cantilever end connection structure.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the construction method of the prefabricated bridge deck installation structure, which can improve the field construction quality and the integrity of a construction structure, reduce the environmental protection difficulty and improve the field construction efficiency.
The construction method of the prefabricated bridge deck installation structure comprises the following steps:
1) construction preparation: carrying out construction of the plate bottom bearing beam and checking the spatial position of the beam top connecting rib; determining the mixing proportion of the grouted concrete;
2) preparing a component: preparing prefabricated bridge decks, guardrail foundations and guardrail columns with planar shapes and bearing capacity meeting requirements;
3) hoisting and positioning the prefabricated bridge deck: an upper bearing plate and a lower bearing plate are respectively arranged on the upper surface and the lower surface of the prefabricated bridge deck, and an inter-plate pull rod is arranged between the upper bearing plate and the lower bearing plate; a sling connector and a positioning support column are arranged on the upper bearing plate, an oblique support rib is arranged between the upper bearing plate and the positioning support column, and a positioning support plate is arranged on the positioning support column; a beam top sleeve plate is arranged on a beam top connecting rib at the upper part of the plate bottom carrier beam, a positioning vertical rod and a transverse rod baffle are arranged on the beam top sleeve plate, and a positioning transverse rod is arranged on the transverse rod baffle; connecting a hoisting rope with a sling connector, correcting the hoisting balance of the prefabricated bridge deck through a transverse position correcting bolt, and hoisting the prefabricated bridge deck to a position above a set position; when the prefabricated bridge deck falls, the positioning support plates are firmly connected with the positioning vertical rods, the prefabricated bridge deck is accurately corrected through the positioning transverse rods, then the restraint of the stay bar connecting bolts on the tension rods between the plates is relieved, and the prefabricated bridge deck falls on the plate bottom bearing beam after the lower bearing plate is taken out;
4) mounting a cantilever end connecting structure: a beam side supporting plate is arranged on the outer side of the plate bottom bearing beam, a cantilever supporting beam is arranged between the plate bottom bearing beam and the prefabricated bridge deck, and a prestressed supporting rib is arranged between the cantilever supporting beam and the beam side supporting plate; side limiting grooves connected with the assembled side molds are respectively arranged on the prefabricated bridge deck and the beam side supporting plates; 2-4 bottom die hanging rods connected with the assembled bottom die are arranged on the cantilever supporting beam; a side die connecting rod is arranged between the two opposite assembled side dies; grouting a cavity formed by enclosing an assembled side die, an assembled bottom die and a plate bottom bearing beam to form a light filling body;
5) grouting the middle joint: connecting the plate end connecting ribs at the middle joint of the prefabricated bridge deck through end rib connecting bolts, and connecting the end rib connecting bolts at the same elevation into a whole through strip-shaped bolt plates; respectively arranging a template hanging plate and a seam hanging die on the upper surface and the lower surface of the seam of the prefabricated bridge deck slab, and arranging hanging die hanging ribs between the template hanging plate and the seam hanging die; the beam side wrapping ribs are arranged on the outer side of the plate bottom bearing beam and connected with the beam top connecting ribs, and rib wrapping fastening bolts are arranged between the beam side wrapping ribs and the plate bottom bearing beam; the lower surface of the beam side wrapping rib is sequentially provided with a die-dropping support column and a transposition bearing, and a rib supporting bottom beam and a die hanging support rib are arranged between the transposition bearing and the seam hanging die; grouting a cavity formed by enclosing the seam hanging die and the prefabricated bridge deck slab to form first seam grouting body; when the seam hanging die is dismantled, firstly removing the restraint of hanging ribs of the hanging die on the seam hanging die, then increasing a die drop support column to separate the seam hanging die from the prefabricated bridge deck, adjusting the trend of the seam hanging die by 75-90 degrees through a transposition bearing, and then hanging out the seam hanging die;
6) grouting the joints of the cantilever ends: connecting plate end connecting ribs at the joints of the cantilever ends of the prefabricated bridge deck plates through end rib connecting bolts, and connecting end rib connecting bolts at the same elevation into a whole through strip-shaped bolt plates; arranging an end hanging die on the prefabricated bridge deck, and firmly connecting the end hanging die with the prefabricated bridge deck through a hanging die hoop plate, a hanging die fastening rod and a hanging die bolt rib; grouting the cavity enclosed by the end hanging die and the prefabricated bridge deck to form second joint grouting body;
7) constructing a guardrail foundation and guardrail columns: arranging a plate bottom closed body in a panel connecting groove on the upper surface of the prefabricated bridge panel; connecting the reserved ribs of the bridge deck with the integral connecting plates, and pressing the plate bottom connecting tenons into the panel connecting grooves; arranging a connecting step and a transverse connecting body at a longitudinal joint of the guardrail foundation, and arranging a foundation anchor bolt between the transverse connecting body and the guardrail foundation; arranging edge reinforcing ribs between the guardrail foundation and the prefabricated bridge deck; the bottom end of the guardrail column is provided with a column side connecting rib body and an elastic expansion connecting rib; a connecting rotating shaft is arranged between the elastic expansion connecting rib and the column side connecting rib body, and an elastic bolt rib is arranged between the elastic expansion connecting rib and the guardrail column; the guardrail column is inserted into the guardrail connecting hole, the elastic expansion connecting rib is embedded into the side wall connecting groove, and the slurry-solid filling body is arranged on the outer side of the guardrail column.
Preferably, the method comprises the following steps: and 2) adopting reinforced concrete materials for the prefabricated bridge deck slab, arranging slab end connecting ribs on four sides of the prefabricated bridge deck slab, and arranging bridge deck reserved ribs and slab connecting grooves on the outer edge of the prefabricated bridge deck slab.
Preferably, the method comprises the following steps: step 3) the upper bearing plate and the lower bearing plate are annularly arranged along the periphery of the prefabricated bridge deck, and connecting strips connected with the plate end connecting ribs are respectively arranged on the upper bearing plate and the lower bearing plate; the positioning vertical rods and the positioning transverse rods are formed by combining bolts and screws; the sling connecting body consists of a connecting body supporting column, a connecting plate position correcting rod and a sling connecting plate; the sling connecting plate is vertically welded with the connecting plate position correcting rod, and a sling penetrating hole is formed in the sling connecting plate; and two ends of the connecting plate position correcting rod are provided with transverse position correcting bolts.
Preferably, the method comprises the following steps: and 4) the assembled side die and the assembled bottom die are made of cement concrete materials or plastic plates or rubber plates, and side connecting tenons and bottom die limiting grooves are arranged on the assembled side die.
Preferably, the method comprises the following steps: and 5) and 6), the cross section of the end rib connecting bolt is U-shaped and is arranged on the outer side of the connected plate end connecting rib, and the top end of the end rib connecting bolt is connected with the strip-shaped bolt plate through a bolt.
Preferably, the method comprises the following steps: and 6) the end hanging die consists of two L-shaped hanging die strip plates, and a hanging die adjusting body is arranged between the hanging die strip plates.
Preferably, the method comprises the following steps: step 7), the guardrail foundation is made of reinforced concrete materials, and a side wall connecting groove and a guardrail connecting hole are preset on the guardrail foundation; the lower surface of the integral connecting plate is provided with a plate bottom connecting tenon; the horizontal connector is located guardrail foundation's connection step department, and horizontal connector one end is pour with guardrail foundation and is become one, and the other end is connected with the basis crab-bolt.
The invention has the beneficial effects that:
(1) the invention not only can improve the efficiency of the hoisting construction of the prefabricated bridge deck, but also can effectively reduce the damage of the hoisting construction to the prefabricated bridge deck and can realize the accurate installation and positioning of the prefabricated bridge deck.
(2) The prefabricated bridge deck slab has the advantages of convenient template arrangement at the joint of the prefabricated bridge deck slab, good stability of the template structure and convenient template dismantling, and can effectively improve the template erecting quality and reduce the difficulty of template dismantling.
(3) The prefabricated bridge deck cantilever end connecting structure has high connecting strength and good integrity, and can effectively improve the durability of the structure on the basis of improving the bearing capacity and stability of the structure.
(4) The invention can effectively improve the connection integrity of the guardrail foundation and the prefabricated bridge deck, improve the connecting rib stress performance of the guardrail foundation and the guardrail column and improve the field construction efficiency.
(5) The invention has high concrete pouring construction efficiency, and can effectively improve the concrete pouring construction environment while reducing the pouring and strickling construction difficulty.
Drawings
FIG. 1 is a flow chart of the construction of the prefabricated bridge deck installation structure of the present invention;
FIG. 2 is a schematic view of a hoisting and positioning structure of a prefabricated bridge deck;
FIG. 3 is a schematic view of the sling interface structure of FIG. 2;
FIG. 4 is a schematic cross-sectional view of a prefabricated deck slab cantilever-end connection;
FIG. 5 is a schematic longitudinal cross-section at the beam side panel of FIG. 4;
FIG. 6 is a schematic longitudinal cross-sectional view of the fabricated mold bottom of FIG. 4;
FIG. 7 is a schematic view of a grouting construction structure at a middle joint of a prefabricated bridge deck;
FIG. 8 is a longitudinal sectional view of a prefabricated decking cantilever end joint;
FIG. 9 is a schematic view of the end hang die mounting structure of FIG. 8;
FIG. 10 is a cross-sectional view of the guardrail mounting connection;
fig. 11 is a schematic view of a longitudinal coupling structure of the barrier base of fig. 10.
Description of reference numerals: 1-prefabricating a bridge deck; 2-a slab bottom carrier bar; 3-beam top connecting ribs; 4-a guardrail foundation; 5-guardrail posts; 6-upper bearing plate; 7-lower deck; 8-inter-plate pull rod; 9-a sling connector; 10-positioning a support column; 11-oblique supporting ribs; 12-positioning a supporting plate; 13-beam top sheathing board; 14-positioning the vertical rod; 15-cross bar baffles; 16-a positioning rail; 17-hoisting a rope; 18-transverse position correcting bolt; 19-a strut connecting bolt; 20-beam side support plates; 21-cantilever beam; 22-prestress bracing ribs; 23-assembled side forms; 24-side limiting groove; 25-assembling a bottom die; 26-bottom die hanging rod; 27-side die link; 28-light weight filler; 29-end rib connecting bolt; 30-strip-shaped bolt plates; 31-hanging a template; 32-seam hanging mould; 33-hanging a mould hanging rib; 34-wrapping ribs at the side of the beam; 35-wrapping a rib fastening bolt; 36-a die-drop bracing column; 37-indexing bearings; 38-bracing rib bottom beam; 39-hanging a mould supporting rib; 40-a first joint grouting body; 41-hanging a mould at the end part; 42-hanging a mold hoop plate; 43-hanging a mould fastening rod; 44-hanging mold bolt ribs; 45-second joint grouting body; 46-panel connection slots; 47-plate bottom obturator; 48-reserving ribs on the bridge deck; 49-integral tie-plates; 50-falcon is connected to the bottom of the plate; 51-connecting step; 52-a transverse linker; 53-foundation anchor bolts; 54-edge reinforcement bar; 55-column side connecting rib body; 56-elastic expansion connecting ribs; 57-connecting the rotating shaft; 58-elastic tie bars; 59-guardrail connection holes; 60-slurry solid filler; 61-connecting ribs at the plate ends; 62-connecting the laths; 63-connector struts; 64-connecting plate position correcting rod; 65-sling connecting plates; 66-Sling through the hole; 67-plate side connecting falcon; 68-bottom die limiting groove; 69-hanging the mould regulating body; 70-sidewall connecting slots; 71-hanging mould slat.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Referring to fig. 1, the construction method of the prefabricated bridge deck installation structure includes the following construction steps:
1) construction preparation: carrying out construction on the plate bottom bearing beam 2 and checking the spatial position of the beam top connecting rib 3; determining the mixing proportion of the grouted concrete;
2) preparing a component: preparing a prefabricated bridge deck 1, a guardrail foundation 4 and guardrail columns 5 with planar shapes and bearing capacity meeting requirements;
3) hoisting and positioning the prefabricated bridge deck 1: an upper bearing plate 6 and a lower bearing plate 7 are respectively arranged on the upper surface and the lower surface of the prefabricated bridge deck 1, and an inter-plate pull rod 8 is arranged between the upper bearing plate 6 and the lower bearing plate 7; a sling connector 9 and a positioning support column 10 are arranged on the upper bearing plate 6, an oblique support rib 11 is arranged between the upper bearing plate 6 and the positioning support column 10, and a positioning support plate 12 is arranged on the positioning support column 10; a beam top sleeve plate 13 is arranged on a beam top connecting rib 3 at the upper part of the plate bottom carrier beam 2, a positioning vertical rod 14 and a cross rod baffle plate 15 are arranged on the beam top sleeve plate 13, and a positioning cross rod 16 is arranged on the cross rod baffle plate 15; connecting a hoisting rope 17 with a sling connector 9, correcting the hoisting balance of the prefabricated bridge deck 1 through a transverse position correcting bolt 18, and hoisting the prefabricated bridge deck 1 to a position above a set position; when the prefabricated bridge deck 1 falls down, the positioning support plates 12 are firmly connected with the positioning vertical rods 14, then the prefabricated bridge deck 1 is accurately corrected through the positioning cross rods 16, then the restraint of the brace connecting bolts 19 on the inter-plate pull rods 8 is removed, and the prefabricated bridge deck 1 falls on the plate bottom bearing beam 2 after the lower bearing plate 7 is taken out;
4) mounting a cantilever end connecting structure: a beam side support plate 20 is arranged on the outer side of the slab bottom carrier beam 2, a cantilever support beam 21 is arranged between the slab bottom carrier beam and the prefabricated bridge deck 1, and a prestressed support rib 22 is arranged between the cantilever support beam 21 and the beam side support plate 20; side limiting grooves 24 connected with the assembled side molds 23 are respectively arranged on the prefabricated bridge deck 1 and the beam side support plate 20; 2-4 bottom die hanging rods 26 connected with the fabricated bottom die 25 are arranged on the cantilever supporting beam 21; a side die connecting rod 27 is arranged between the two opposite assembled side dies 23; grouting a cavity enclosed by the assembled side die 23, the assembled bottom die 25 and the plate bottom bearing beam 2 to form a light filling body 28;
5) grouting the middle joint: connecting the plate end connecting ribs 61 at the middle joint of the prefabricated bridge deck 1 through the end rib connecting bolts 29, and connecting the end rib connecting bolts 29 at the same elevation into a whole through the strip-shaped bolt plates 30; the upper surface and the lower surface of the joint of the prefabricated bridge deck 1 are respectively provided with a template hanging plate 31 and a joint hanging mould 32, and a hanging mould hanging rib 33 is arranged between the template hanging plate 31 and the joint hanging mould 32; the beam side wrapping rib 34 is arranged on the outer side of the plate bottom carrier beam 2, is connected with the beam top connecting rib 3, and is provided with a wrapping rib fastening bolt 35 between the beam side wrapping rib and the plate bottom carrier beam 2; a die-falling supporting column 36 and an indexing bearing 37 are sequentially arranged on the lower surface of the beam side wrapping rib 34, and a rib supporting bottom beam 38 and a hanging die supporting rib 39 are arranged between the indexing bearing 37 and the seam hanging die 32; grouting a cavity formed by enclosing the seam hanging die 32 and the prefabricated bridge deck slab 1 to form first seam grouting body 40; when the seam hanging die 32 is dismantled, firstly removing the restraint of the hanging die hanging ribs 33 on the seam hanging die 32, then increasing the die drop support posts 36 to separate the seam hanging die 32 from the prefabricated bridge deck 1, then adjusting the direction of the seam hanging die 32 by 75-90 degrees through the indexing bearings 37, and then hanging the seam hanging die 32 out;
6) grouting the joints of the cantilever ends: connecting plate end connecting ribs 61 at cantilever end joints of the prefabricated bridge deck 1 through end rib connecting bolts 29, and connecting the end rib connecting bolts 29 at the same elevation into a whole through strip-shaped bolt plates 30; arranging an end hanging die 41 on the prefabricated bridge deck 1, and firmly connecting the end hanging die 41 with the prefabricated bridge deck 1 through a hanging die hoop plate 42, a hanging die fastening rod 43 and a hanging die bolt rib 44; grouting the cavity enclosed by the end hanging die 41 and the prefabricated bridge deck 1 to form second joint grouting body 45;
7) and (3) construction of a guardrail foundation 4 and guardrail columns 5: a plate bottom closing body 47 is arranged in a panel connecting groove 46 on the upper surface of the prefabricated bridge panel 1; connecting the reserved bridge deck ribs 48 with the integral connecting plates 49, and pressing the plate bottom connecting tenons 50 into the panel connecting grooves 46; arranging a connecting step 51 and a transverse connecting body 52 at the longitudinal joint of the guardrail foundation 4, and arranging a foundation anchor bolt 53 between the transverse connecting body 52 and the guardrail foundation 4; arranging edge reinforcing ribs 54 between the guardrail foundation 4 and the prefabricated bridge deck 1; the bottom end of the guardrail column 5 is provided with a column side connecting rib body 55 and an elastic expansion connecting rib 56; a connecting rotating shaft 57 is arranged between the elastic expansion connecting rib 56 and the column side connecting rib body 55, and an elastic bolt rib 58 is arranged between the elastic expansion connecting rib and the guardrail column 5; the guardrail posts 5 are inserted into the guardrail connecting holes 59, the elastic expansion connecting ribs 56 are embedded into the side wall connecting grooves 70, and the grout filling 60 is arranged on the outer sides of the guardrail posts 5.
Referring to fig. 2 to 11, in the prefabricated bridge deck installation structure, a prestressed bracing rib 22 is arranged between a cantilever bracing beam 21 and a beam side bracing plate 20; a light filling body 28 is arranged in a cavity formed by enclosing the assembled side die 23, the assembled bottom die 25 and the plate bottom bearing beam 2; connecting the end rib connecting bolts 29 with the same height into a whole through strip-shaped bolt plates 30; the hoisting direction of the seam hoisting die 32 during dismantling is adjusted through the indexing bearing 37; the end hanging die 41 is firmly connected with the prefabricated bridge deck 1 through the hanging die hoop plate 42, the hanging die fastening rod 43 and the hanging die bolt rib 44; arranging a connecting step 51 and a transverse connecting body 52 at the longitudinal joint of the guardrail base 4; the guardrail posts 5 are connected with the guardrail foundation 4 through the elastic expansion connecting ribs 56, the side wall connecting grooves 70 and the grout filling body 60.
The thickness of the prefabricated bridge deck 1 is 150mm, the width is 3m, the length is 6m, a reinforced concrete material is adopted, and the concrete strength grade is C55.
The plate bottom carrier bar 2 is formed by rolling a steel plate with the thickness of 2cm, the width of the plate bottom carrier bar is 400mm, the height of the plate bottom carrier bar is 600mm, and the strength grade of the steel plate is Q235.
The beam top connecting rib 3 is formed by rolling a twisted steel bar with the diameter of 32mm, and the length of the beam top connecting rib is 15 cm.
The guardrail foundation 4 is made of reinforced concrete, the concrete strength grade is C45, the height is 30cm, and the bottom width is 40 cm.
The guardrail column 5 is rolled into a square steel tube shape by adopting a steel plate with the thickness of 1cm, and the width of the steel tube is 10 cm.
The upper bearing plate 6 and the lower bearing plate 7 are both made of steel plates with the thickness of 20 mm.
The pull rod 8 between the plates is made of a screw rod with the diameter of 30 mm.
The sling connector 9 is composed of a connector support column 63, a connecting plate position-correcting rod 64 and a sling connecting plate 65. The connector brace 63 is made of a steel pipe material with the diameter of 60 mm; the connecting plate position-adjusting rod 64 is formed by combining a screw rod and a bolt, wherein the diameter of the screw rod is 30 mm. The sling connecting plate 65 is formed by rolling a steel plate with the thickness of 10mm, and the width of the sling connecting plate is 10cm, and the height of the sling connecting plate is 20 cm. The diameter of the sling passing through the hole 66 is 6 cm.
The positioning support column 10 adopts H-shaped steel with the specification of 250 multiplied by 9 multiplied by 14.
The inclined supporting rib 11 is a steel pipe with the diameter of 60 mm.
The positioning supporting plate 12 is made of H-shaped steel material with the specification of 200 multiplied by 8 multiplied by 12.
The beam top sleeve plate 13 is formed by rolling a steel plate with the thickness of 1 cm.
The vertical positioning rods 14 and the transverse positioning rods 16 are both formed by combining bolts and screws, wherein the diameter of each screw is 30 mm.
The cross bar baffle 15 is made of H-shaped steel with the specification of 100 multiplied by 6 multiplied by 8.
The hoisting rope 17 is a wire rope with a diameter of 30 mm.
The transverse position-correcting bolt 18 and the stay bar connecting bolt 19 both adopt bolts with the inner diameter of 30 mm.
The beam side supporting plate 20 is made of a steel plate with the thickness of 20mm, the width of the steel plate is 15cm, and the steel plate is vertically welded and connected with the plate bottom bearing beam 2.
The cantilever beam 21 is formed by rolling a steel plate with the thickness of 1cm, and the cross section of the cantilever beam is in a right trapezoid shape.
The prestressed bracing wire 22 is made of a bolt and a screw rod with the diameter of 30 mm.
The assembled side die 23 and the assembled bottom die 25 both adopt reinforced concrete templates, the thickness is 3cm, and the concrete strength grade is C35.
The depth of the side limiting groove 24 is 3cm, and the side limiting groove is formed by rolling a steel plate with the thickness of 2 mm.
The bottom die hanging rod 26 and the side die connecting rod 27 both adopt screws with the diameter of 30 mm.
The light filler 28 has a weight of 0.7g/cm3The foam concrete.
The end rib connecting bolt 29 is U-shaped in cross section and is arranged on the outer side of the connected plate end connecting rib 61, the top end of the end rib connecting bolt is connected with the strip-shaped bolt plate 30 through a bolt, and the diameter of the end rib connecting bolt is 12 mm.
The strip-shaped bolt plate 30 is rolled by a steel plate with the thickness of 1cm, and the width of the strip-shaped bolt plate is 5 cm.
The template hanging plate 31 is made of a steel plate with the thickness of 2cm, the width of 30cm and the length of 60 cm.
The seam hanging die 32 adopts an alloy template with the thickness of 4 mm.
The hanging mould hanging bar 33 is made of steel bars with the diameter of 20 mm.
The beam side wrapping ribs 34 are formed by rolling steel plates with the thickness of 1 mm.
The reinforcing bar wrapping fastening bolt 35 is made of a bolt with the diameter of 30 mm.
The die-falling brace 36 is formed by rolling a steel pipe with the diameter of 100 mm.
The bracing rib bottom beam 38 is made of H-shaped steel material with the specification of 100 multiplied by 6 multiplied by 8.
The hanging die supporting rib 39 is made of an H-shaped steel material with the specification of 100 multiplied by 6 multiplied by 8.
The first joint grout body 40 and the second joint grout body 45 both use micro-expansive concrete having a strength grade of C50.
The end hanging die 41 is composed of two L-shaped hanging die strips 71, and the hanging die strips 71 adopt alloy templates with the thickness of 4 mm.
The hanging die hoop plate 42 is made of a steel plate with the thickness of 2 mm.
The mold-hanging fastening rod 43 is made of a screw material with a diameter of 30 mm.
The hanging mold bolt rib 44 is made of a bolt with the diameter of 30 mm.
The panel connecting grooves 46 have a depth of 15cm and a width of 10 cm.
The plate bottom obturation body 47 is of concrete material with a strength grade C50.
The reserved bridge deck ribs 48 are twisted steel bars with the diameter of 32mm, and the extending length of the reserved bridge deck ribs is 15 cm.
The integral connecting plate 49 is formed by rolling a steel plate with the thickness of 1mm and the width of 15 cm.
The transverse sections of the plate bottom connecting falcon 50 and the plate side connecting falcon 67 are in an isosceles trapezoid shape, the bottom width is 10cm, and the height is 15 cm.
The connecting step 51 has a width of 10cm and a height of 15 cm.
The transverse connector 52 is cut from a steel plate with a thickness of 2 mm.
The foundation anchor 53 is a bolt having a diameter of 30 mm.
The edge bead 54 is rolled from a steel plate having a thickness of 2 cm.
The column-side connecting rib body 55 is formed by rolling a steel plate with the thickness of 2 mm.
The elastic expansion connecting rib 56 is made of a steel sheet with the thickness of 2 mm.
The connection shaft 57 is a stainless steel shaft having a diameter of 1 cm.
The elastic bolt rib 58 is made of a spring material with the diameter of 2 cm.
The guardrail connecting hole 59 has a width of 15cm and a depth of 20 cm.
The grout filler 60 is made of a concrete material with a strength grade of C40.
The plate-end connecting rib 61 is a twisted steel bar with the diameter of 32 mm.
The connecting strip 62 is cut out of a steel plate having a thickness of 2 cm.
The mold hanging adjuster 69 is a rubber plate having a thickness of 4 mm.
The depth of the bottom die limiting groove 68 is 10cm, and the bottom die limiting groove is formed by rolling a steel plate with the thickness of 2 mm.
The lateral section of the side wall connecting groove 70 is in an isosceles trapezoid shape, the height is 2cm, and the bottom width is 6 cm.
Claims (7)
1. The construction method of the prefabricated bridge deck installation structure is characterized by comprising the following construction steps:
1) construction preparation: constructing the plate bottom bearing beam (2), and checking the spatial position of the beam top connecting rib (3); determining the mixing proportion of the grouted concrete;
2) preparing a component: preparing a prefabricated bridge deck (1), a guardrail foundation (4) and guardrail columns (5) which meet the requirements on plane shape and bearing capacity;
3) hoisting and positioning the prefabricated bridge deck (1): an upper bearing plate (6) and a lower bearing plate (7) are respectively arranged on the upper surface and the lower surface of the prefabricated bridge deck (1), and an inter-plate pull rod (8) is arranged between the upper bearing plate (6) and the lower bearing plate (7); a sling connector (9) and a positioning support column (10) are arranged on the upper bearing plate (6), an oblique support rib (11) is arranged between the upper bearing plate (6) and the positioning support column (10), and a positioning support plate (12) is arranged on the positioning support column (10); a beam top sleeve plate (13) is arranged on a beam top connecting rib (3) at the upper part of the plate bottom bearing beam (2), a positioning vertical rod (14) and a transverse rod baffle plate (15) are arranged on the beam top sleeve plate (13), and a positioning transverse rod (16) is arranged on the transverse rod baffle plate (15); the hoisting rope (17) is connected with a sling connecting body (9), and the sling connecting body (9) consists of a connecting body supporting column (63), a connecting plate position correcting rod (64) and a sling connecting plate (65); the sling connecting plate (65) is vertically welded and connected with the connecting plate aligning rod (64), and sling through holes (66) are formed in the sling connecting plate (65); two ends of the connecting plate position correcting rod (64) are provided with transverse position correcting bolts (18); after the hoisting balance of the prefabricated bridge deck (1) is corrected through the transverse position correcting bolt (18), hoisting the prefabricated bridge deck (1) to the upper part of a set position; when the prefabricated bridge deck (1) falls down, firstly, the positioning support plates (12) are firmly connected with the positioning vertical rods (14), then, the prefabricated bridge deck (1) is accurately corrected through the positioning cross rods (16), then, the restraint of the brace connecting bolts (19) on the inter-plate pull rods (8) is removed, and the prefabricated bridge deck (1) falls on the plate bottom bearing beam (2) after the lower bearing plate (7) is taken out;
4) mounting a cantilever end connecting structure: a beam side supporting plate (20) is arranged on the outer side of the slab bottom bearing beam (2), a cantilever supporting beam (21) is arranged between the slab bottom bearing beam (2) and the prefabricated bridge deck (1), and a prestress supporting rib (22) is arranged between the cantilever supporting beam (21) and the beam side supporting plate (20); side limiting grooves (24) connected with the assembled side molds (23) are respectively arranged on the prefabricated bridge deck (1) and the beam side supporting plates (20); 2-4 bottom die hanging rods (26) connected with the fabricated bottom die (25) are arranged on the cantilever supporting beam (21); a side die connecting rod (27) is arranged between the two opposite assembled side dies (23); grouting a cavity enclosed by the assembled side die (23), the assembled bottom die (25) and the plate bottom bearing beam (2) to form a light filling body (28);
5) grouting the middle joint: connecting plate end connecting ribs (61) at the middle joint of the prefabricated bridge deck (1) through end rib connecting bolts (29), and connecting the end rib connecting bolts (29) at the same elevation into a whole through strip-shaped bolt plates (30); the upper surface and the lower surface of the joint of the prefabricated bridge deck (1) are respectively provided with a template hanging plate (31) and a joint hanging die (32), and a hanging die hanging rib (33) is arranged between the template hanging plate (31) and the joint hanging die (32); the beam side wrapping rib (34) is arranged on the outer side of the plate bottom bearing beam (2), the beam side wrapping rib (34) is connected with the beam top connecting rib (3), and a wrapping rib fastening bolt (35) is arranged between the beam side wrapping rib (34) and the plate bottom bearing beam (2); a die-falling supporting column (36) and an indexing bearing (37) are sequentially arranged on the lower surface of the beam side wrapping rib (34), and a rib supporting bottom beam (38) and a die hanging supporting rib (39) are arranged between the indexing bearing (37) and the seam hanging die (32); grouting a cavity enclosed by the seam hanging die (32) and the prefabricated bridge deck (1) to form first seam grouting body (40); when the seam hanging die (32) is dismantled, firstly removing the restraint of a hanging die hanging rib (33) on the seam hanging die (32), then increasing a die falling support column (36) to separate the seam hanging die (32) from the prefabricated bridge deck (1), adjusting the direction of the seam hanging die (32) by 75-90 degrees through a transposition bearing (37), and then hanging out the seam hanging die (32);
6) grouting the joints of the cantilever ends: connecting plate end connecting ribs (61) at the joints of cantilever ends of the prefabricated bridge deck (1) through end rib connecting bolts (29), and connecting the end rib connecting bolts (29) at the same elevation into a whole through strip-shaped bolt plates (30); an end hanging die (41) is arranged on the prefabricated bridge deck (1), and the end hanging die (41) is firmly connected with the prefabricated bridge deck (1) through a hanging die hoop plate (42), a hanging die fastening rod (43) and a hanging die bolt rib (44); grouting the cavity enclosed by the end hanging die (41) and the prefabricated bridge deck (1) to form second joint grouting body (45);
7) construction of a guardrail foundation (4) and guardrail columns (5): a plate bottom closing body (47) is arranged in a panel connecting groove (46) on the upper surface of the prefabricated bridge panel (1); connecting the reserved bridge deck ribs (48) with the integral connecting plates (49), and pressing the plate bottom connecting tenons (50) into the panel connecting grooves (46); a connecting step (51) and a transverse connecting body (52) are arranged at the longitudinal joint of the guardrail foundation (4), and a foundation anchor bolt (53) is arranged between the transverse connecting body (52) and the guardrail foundation (4); arranging edge reinforcing ribs (54) between the guardrail foundation (4) and the prefabricated bridge deck (1); the bottom end of the guardrail column (5) is provided with a column side connecting rib body (55) and an elastic expansion connecting rib (56); a connecting rotating shaft (57) is arranged between the elastic expansion connecting rib (56) and the column side connecting rib body (55), and an elastic bolt rib (58) is arranged between the elastic expansion connecting rib (56) and the guardrail column (5); the guardrail column (5) is inserted into the guardrail connecting hole (59), the elastic expansion connecting rib (56) is embedded into the side wall connecting groove (70), and a slurry-fixed filling body (60) is arranged on the outer side of the guardrail column (5).
2. The construction method of a prefabricated bridge deck installation structure according to claim 1, wherein: and 2), adopting reinforced concrete materials for the prefabricated bridge deck (1), arranging plate end connecting ribs (61) on four sides of the prefabricated bridge deck (1), and arranging bridge deck reserved ribs (48) and deck connecting grooves (46) on the outer edge of the prefabricated bridge deck (1).
3. The construction method of a prefabricated bridge deck installation structure according to claim 1, wherein: step 3), the upper bearing plate (6) and the lower bearing plate (7) are annularly arranged along the periphery of the prefabricated bridge deck (1), and connecting strips (62) connected with plate end connecting ribs (61) are respectively arranged on the upper bearing plate (6) and the lower bearing plate (7); the positioning vertical rods (14) and the positioning transverse rods (16) are formed by combining bolts and screws.
4. The construction method of a prefabricated bridge deck installation structure according to claim 1, wherein: and 4), the assembly type side die (23) and the assembly type bottom die (25) are made of cement concrete materials or plastic plates or rubber plates, and a side connecting tenon (67) and a bottom die limiting groove (68) are arranged on the assembly type side die (23).
5. The construction method of a prefabricated bridge deck installation structure according to claim 1, wherein: and 5) and 6), the cross section of the end rib connecting bolt (29) is U-shaped and is arranged on the outer side of the connected plate end connecting rib (61), and the top end of the end rib connecting bolt (29) is connected with the strip-shaped bolt plate (30) through a bolt.
6. The construction method of a prefabricated bridge deck installation structure according to claim 1, wherein: and step 6), the end part hanging die (41) consists of two L-shaped hanging die strip plates (71), and a hanging die adjusting body (69) is arranged between the hanging die strip plates (71).
7. The construction method of a prefabricated bridge deck installation structure according to claim 1, wherein: step 7), the guardrail base (4) is made of reinforced concrete materials, and a side wall connecting groove (70) and a guardrail connecting hole (59) are preset on the guardrail base (4); a plate bottom connecting falcon (50) is arranged on the lower surface of the integral connecting plate (49); the transverse connecting body (52) is arranged at a connecting step (51) of the guardrail foundation (4), one end of the transverse connecting body (52) is integrally cast with the guardrail foundation (4), and the other end of the transverse connecting body is connected with a foundation anchor bolt (53).
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| CN203755164U (en) * | 2013-12-31 | 2014-08-06 | 中铁二十一局集团路桥工程有限公司 | Special hanging bracket for construction of post-pouring flange plates of acoustic barrier T-shaped beam |
| JP6609815B2 (en) * | 2016-09-07 | 2019-11-27 | 株式会社横河ブリッジ | Precast slab, composite structure of steel girder and precast slab, and method of synthesizing steel girder and precast slab |
| JP6793542B2 (en) * | 2016-12-26 | 2020-12-02 | 株式会社Ｉｈｉインフラシステム | Floor slab erection method and floor slab erection equipment |
| KR20190018775A (en) * | 2017-08-16 | 2019-02-26 | 박정자 | Railcar travelling on bridge girders for carrying precast slabs and construction method for placing precast slabs using the railcar |
| CN108166392A (en) * | 2017-11-24 | 2018-06-15 | 湖北华舟重工应急装备股份有限公司 | A kind of floorings hanging device and method |
| CN108330823B (en) * | 2018-02-09 | 2019-07-16 | 中交第二公路勘察设计研究院有限公司 | Assembled steel reinforced concrete composite beam bridge floorings longitudinal joint connecting structure and construction method |
| CN108691272A (en) * | 2018-05-28 | 2018-10-23 | 中铁第四勘察设计院集团有限公司 | Combine the sleeve connection structure and its construction method of formed precast concrete floorings |
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