CN110983990A - Construction method for paving composite strong bridge deck - Google Patents
Construction method for paving composite strong bridge deck Download PDFInfo
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- CN110983990A CN110983990A CN201911421496.9A CN201911421496A CN110983990A CN 110983990 A CN110983990 A CN 110983990A CN 201911421496 A CN201911421496 A CN 201911421496A CN 110983990 A CN110983990 A CN 110983990A
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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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Abstract
The invention relates to a construction method for paving a composite strong bridge deck, which comprises the following steps: step 1: measuring and paying off, and performing embedded bolt sleeve construction in the beam body; step 2: adjusting the distance between the two sliding templates by moving a fixing nut on the adjusting screw rod left and right; and step 3: injecting concrete into the hopper; and 4, step 4: installing a steel rail; and 5: roughening and cleaning the top of a beam body of the bridge deck; step 6: concrete is poured between the adjacent beam bodies to form a wet joint; and 7: a vibration beam is arranged on the channel steel track; and 8: dismantling channel steel; and step 9: high-elastic high-viscosity asphalt and equal-particle-size crushed stones are synchronously sprayed to form a waterproof bonding stress absorbing layer; step 10: and adopting SBS modified asphalt mixture to form asphalt surface layer. The invention has the beneficial effects that: according to the invention, the bottom plate of the embedded bolt sleeve is connected with the beam body fixed steel bars, and the top part of the embedded bolt sleeve is connected with the beam body upper layer steel bars, so that the accurate positioning of the embedded bolt sleeve can be realized.
Description
Technical Field
The invention relates to the technical field of bridge deck pavement construction, in particular to a construction method for composite strong bridge deck pavement.
Background
In recent years, with the rapid development of the construction business of the expressway in China, the expressway rapidly extends to a mountain area with complex terrain and geological conditions, and the proportion of the total length of the bridge occupying the route is larger and larger. With the continuous improvement of traffic volume and climate severity, bridge deck pavement in which a bridge directly bears wheel load faces severe tests.
The existing high-grade highway bridge deck pavement generally adopts cement concrete with reinforcing mesh as a lower surface layer of the bridge deck pavement and asphalt concrete as an upper surface layer of the bridge deck pavement. However, the traditional reinforcing mesh paved on the bridge deck is easy to sink, the quality is difficult to control, and the defects such as cracks, local pits and the like appear in a short period under the action of various adverse factors such as construction and environment, and particularly, a large number of cracks appear in the early stage after concrete pouring due to the fact that the concrete mixing ratio design, concrete mixing, pouring and maintenance technologies are lagged behind, and the defects seriously affect the driving comfort, the structural safety and the traffic capacity and cause potential safety hazards.
Therefore, the demand for finding a composite strong bridge deck pavement construction method capable of solving the problems of more diseases, shorter service life and the like of the traditional bridge deck pavement is very important at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a construction method for paving a composite strong bridge deck.
The construction method for paving the composite strong bridge deck comprises the following steps:
step 1: measuring and paying off, and performing embedded bolt sleeve construction in the beam body;
step 2: the distance between the two sliding templates is adjusted by moving the fixing nut on the adjusting screw rod left and right to be equal to the width of the bar brace; adjusting the scraping plate to the designated height of the scraping plate groove, fixing the scraping plate by adopting an adjusting screw and a rotary sliding rod, and fixing the rotary ring plate on the adjusting screw by using a fixing nut; aligning a plumb on a plumb rod with the bar stay mark line;
and step 3: pouring concrete into the hopper, opening the valve, opening the vibration exciter, pushing the advancing system forwards, and pouring the bar brace;
and 4, step 4: installing a steel rail, placing a channel steel rail above the bar brace, arranging a fixed steel bar at two sides of the steel rail to be connected with an embedded bolt sleeve of the beam body, and welding the fixed steel bar with the channel steel rail;
and 5: roughening and cleaning the top of a beam body of the bridge floor, and installing a separated horseshoe-shaped anchoring steel bar on the top surface of the beam body at a specified position;
step 6: concrete is poured between the adjacent beam bodies to form a wet joint;
and 7: installing a vibrating beam on the channel steel track, and pouring steel fiber concrete twice in a single width to form a high anti-crack concrete leveling layer;
and 8: removing the channel steel, and pouring left and right high-crack-resistance concrete leveling layer splicing seams;
and step 9: high-elastic high-viscosity asphalt and equal-particle-size crushed stones are synchronously sprayed to form a waterproof bonding stress absorbing layer;
step 10: and adopting SBS modified asphalt mixture to form asphalt surface layer.
Preferably, the method comprises the following steps: in the step 1, a sleeve bottom plate is arranged at the bottom of the embedded bolt sleeve and is bound with fixed steel bars of the beam body, and the top of the embedded bolt sleeve is bound with upper-layer steel bars of the beam body; the embedded bolt sleeve is internally provided with a separated horseshoe-shaped anchoring steel bar and a fixing steel bar which are installed later respectively; and a protective nut is arranged at the top of the embedded bolt sleeve before the separated horseshoe-shaped anchoring steel bar and the fixing steel bar are installed.
Preferably, the method comprises the following steps: in the step 2, the bar brace is constructed by adopting an adjustable single-side small-sized slip form structure, and the adjustable single-side small-sized slip form structure comprises an advancing system, a hopper and an adjustable sliding template; the advancing system consists of vertical supports, horizontal supports and transverse connecting supports, the three vertical supports and the three horizontal supports form a rectangular frame, the two rectangular frames are connected through the transverse connecting supports and connecting screws to form a rectangular frame, and rollers are arranged on the outer sides of the horizontal supports at the bottom of the rectangular frame through rolling shafts; the hopper is arranged at the tops of two adjacent vertical supports, the tops of the two vertical supports are provided with concave bayonets, the lengths of the concave bayonets at the two sides are 5-10mm longer than the maximum diameter of the hopper, and the bottom of the hopper is provided with a valve which is positioned in front of the advancing direction of the scraping plate; the adjustable sliding template comprises sliding templates on two sides of a bar support and a scraping plate inserted in a scraping plate groove of the sliding template, vibration exciters are arranged on the outer sides of the sliding templates on the two sides respectively, a plumb rod and a plumb are arranged at the end part of the sliding template, a row of screw rod holes are formed in the top of the sliding template and the corresponding height of a horizontal support, two rows of welding blocks are arranged in the middle and the bottom of the sliding template and the corresponding height of the horizontal support, an adjusting screw rod perpendicular to the welding blocks is welded on the outer side of each welding block, an inclined screw hole is formed in the scraping plate groove at the top of the sliding template on the two sides respectively, and the inclined screw holes are obliquely crossed with the scraping plate groove.
Preferably, the method comprises the following steps: in the step 2, the adjusting screw rods on the welding blocks penetrate through screw rod holes in the vertical supports on the left side and the right side, and gaskets and fixing nuts are arranged on the outer sides of the vertical supports; a rotary ring plate is arranged on an adjusting screw rod of the central welding block, a rotary slide rod is arranged on one side of the rotary ring plate, and a fixing nut is arranged on the outer side of the rotary ring plate; the scraping plate moves up and down in the scraping plate groove, in the pouring process, the lower side of the scraping plate is fixed by rotating the sliding rod, the upper side of the scraping plate is fixed by the adjusting screw, and sealing strips are arranged in gaps of the scraping plate groove.
Preferably, the method comprises the following steps: in the step 4, embedded bolt sleeves are arranged on the left side and the right side of the bar brace and the channel steel rail at equal intervals, the embedded bolt sleeves on the two sides are parallel to the bar brace and the channel steel rail, and the interval between longitudinally adjacent embedded bolt sleeves is 0.5-1 m; the bottom of the fixed steel bar is connected with the embedded bolt sleeve, and the top of the fixed steel bar is welded with the side face of the channel steel.
Preferably, the method comprises the following steps: in the step 5, the separated horseshoe-shaped anchoring steel bars are formed by splicing L-shaped steel bars which are symmetrically distributed in pairs, and extrusion sleeves are arranged at the corners of the tops of the separated horseshoe-shaped anchoring steel bars which are symmetrically distributed in pairs; the diameter of the separated horseshoe-shaped anchoring steel bar is the same as the inner diameter of the embedded bolt sleeve; the separated horseshoe-shaped anchoring steel bars are arranged at equal intervals of 0.3-0.8 m from top to bottom, left to right.
Preferably, the method comprises the following steps: in the step 7, the high anti-crack concrete leveling layer adopts a steel fiber concrete layer which is poured twice in a single width, a longitudinal construction joint is reserved at the center line of the bridge floor, and the anti-collision fences at the two sides of the bridge floor and the center line of the bridge floor are respectively provided with a vibration beam track with the lower parts being strip-supported and the upper parts being channel steel.
Preferably, the method comprises the following steps: in the step 10, the asphalt surface layer is provided with a drainage slope, and the lower side of the anti-collision fence on the slope surface is provided with a bridge deck pavement water collecting tank.
The invention has the beneficial effects that:
(1) the composite strong bridge deck pavement disclosed by the invention comprises a strong connecting layer, a high anti-crack concrete leveling layer, a waterproof bonding stress absorbing layer and an asphalt surface layer, the problems of more diseases, shorter service life and the like of the traditional bridge deck pavement are solved by the strong connecting layer, and the construction quality and the service life of the bridge deck are effectively improved.
(2) According to the embedded bolt sleeve, the bottom plate of the embedded bolt sleeve is connected with the fixed steel bars of the beam body, and the top of the embedded bolt sleeve is connected with the steel bars on the upper layer of the beam body, so that the accurate positioning of the embedded bolt sleeve can be realized, and the installation quality of the horseshoe bars is ensured.
(3) The strong connecting layer is positioned at the interface of the beam body and the leveling layer, the horseshoe-shaped anchoring steel bar is arranged on the top surface of the beam body, the interface activating technology is adopted, the bolt sleeve is embedded in the beam body, the horseshoe-shaped anchoring steel bar is installed by the post-installation technology, the horseshoe-shaped anchoring steel bar installation efficiency is high, and the construction period can be effectively shortened.
(4) The concrete bridge deck guide rail formwork system comprises a concrete bar brace and upper channel steel, bolt sleeves are embedded in the left side and the right side of the bar brace, and reinforcing steel bars are installed behind the bolt sleeves to fix the channel steel on the upper portion of the bar brace, so that a channel steel rail can be accurately positioned, and the stability of the channel steel rail in the concrete bridge deck construction process is guaranteed.
(5) The concrete struts and the channel steel can be used as construction side molds of a concrete bridge deck leveling layer and play a role in elevation control.
(6) The adjustable single-side small-sized slip form structure is adopted for bar brace construction, the width and the height of the slip form structure can be adjusted according to the size of a bar brace, the requirements of concrete bar brace construction of different sizes are met, and the construction adaptability is strong.
(7) The adjustable single-side small-sized slip form structure is adopted for bar brace construction, the slip form is provided with the vibration exciting plate, the functions of pouring, vibrating, forming and the like are achieved, the construction efficiency is high, and the bar brace construction period can be effectively shortened.
(8) The adjustable single-side small-sized slip form structure is adopted for bar brace construction, and the sliding formwork can meet the requirement of height precision of the bar brace, so that the mounting precision of a channel steel guide rail is ensured, and the construction quality of a bridge floor is ensured.
Drawings
FIG. 1 is a schematic view of a composite strong deck pavement structure;
FIG. 2 is a plan view of a composite strong deck pavement;
fig. 3 is a detailed view of a node of the strong connecting layer separated horseshoe-shaped anchoring steel bar (node a in fig. 1);
FIG. 4 is a schematic view of a composite strong bridge deck pavement embedded bolt sleeve (without separate horseshoe-shaped anchoring bars installed);
FIG. 5 is a plan view of the embedded bolt sleeve for paving a composite strong bridge deck (without installing the separated horseshoe-shaped anchoring steel bars);
FIG. 6 is a cross-sectional view (section A-A in FIG. 5) of a sleeve of an embedded bolt for paving a composite strong bridge deck;
FIG. 7 is a cross-sectional view of a bridge deck brace-channel track (section B-B in FIG. 6);
FIG. 8 is a schematic structural view of a concrete bracing adjustable one-sided compact slip form;
FIG. 9 is a schematic view of a bar-stay adjustable one-sided compact slip form construction (adjustable slip form construction bar stay minimum height);
FIG. 10 is a schematic view of a bar-stay adjustable one-sided compact slip form construction (adjustable slip form construction maximum height of bar stay);
FIG. 11 is a cross-sectional view (section C-C in FIG. 9) of a bar-stay adjustable one-sided compact slip-form structure;
FIG. 12 is a detailed view of an adjustable single-sided small-sized sliding form structure roller structure (node B in FIG. 11);
FIG. 13 is a schematic view of a sliding template configuration;
FIG. 14 is a side view of the sliding stencil;
FIG. 15 is a schematic view of a rotary slide-rotary ring plate structure;
FIG. 16 is a layout of T-beam composite strong deck pavement;
FIG. 17 is a layout of composite strong bridge deck with small box girders.
Description of reference numerals: 1-a beam body; 2-upper-layer steel bars of the beam body; 3-fixing the steel bars on the beam body; 4-robust connection layer; 5-high crack resistance concrete leveling layer; 6-waterproof bonding stress absorbing layer; 7-asphalt surface course; 8-embedding a bolt sleeve; 9-sleeve bottom plate; 10-a separate horseshoe-shaped anchoring bar; 11-extrusion type sleeve; 12-a protective nut; 13-T beam; 14-collision fence; 15-bridge deck pavement water collection tank; 16-embedding ribs; 17-pier stud; 18-a base; 19-earth surface; 20-soil layer; 21-wet seaming; 22-small box girder; 23-diaphragm wet seam; 24-drainage slope; 25-a hopper; 26-vertical support; 27-bayonet; 28-a valve; 29-horizontal support; 30-transverse connecting supports; 31-connecting screw; 32-adjusting screw; 33-a roller; 34-a roller; 35-a sliding template; 36-a vibration exciter; 37-strickle off the trough; 38-screw hole; 39-adjusting screws; 40-screw holes; 41-plumb bob rod; 42-plumb bob; 43-a fixing nut; 44-a gasket; 45-scraping the plate; 46-a sealing strip; 47-push-pull handle; 48-concrete; 49-bar bracing; 50-rotating the slide bar; 51-rotating ring plate; 52-solder bumps; 53-channel steel; 54-fixing the reinforcing steel bars.
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.
With reference to the attached drawings 1 to 17, the composite strong bridge deck pavement is composed of a strong connecting layer 4, a high crack-resistant concrete leveling layer 5, a waterproof bonding stress absorbing layer 6 and an asphalt surface layer 7; the two sides of the composite strong bridge deck pavement are provided with anti-collision fences 14. The construction method comprises the following steps:
step 1: measuring and paying off, and constructing a pre-buried bolt sleeve 8 in the beam body 1, as shown in attached figures 4 and 5;
step 2: the distance between the two sliding templates 35 is adjusted by moving the fixing nut 43 on the adjusting screw rod 32 left and right to be equal to the width of the bar brace 49; the scraping plate 45 is adjusted to the designated height of the scraping plate groove 37, the scraping plate 45 is fixed by adopting an adjusting screw 39 and a rotary slide rod 50, and a rotary ring plate 51 is fixed on the adjusting screw rod 32 by using a fixing nut 43; aligning the plumb 42 on the plumb rod 41 with the brace 49 markings, as shown in FIGS. 8-11;
and step 3: pouring concrete 48 into the hopper 25, opening the valve 28, opening the exciter 36, pushing the advancing system forward, and pouring a concrete bar, as shown in fig. 8;
and 4, step 4: installing a channel steel 53 track, wherein the channel steel 53 track is placed above the bar brace 49, fixing steel bars 54 are arranged on two sides of the channel steel 53 track and connected with the embedded bolt sleeves 8 of the beam body 1, and the fixing steel bars 54 are welded with the channel steel 53 track, as shown in attached figures 6 and 7;
and 5: roughening and cleaning the top of a beam body 1 of the bridge deck, and installing a split horseshoe-shaped anchoring steel bar 10 on the top surface of the beam body 1 at a specified position, as shown in attached figures 1-3;
step 6: concrete is poured between the adjacent beam bodies 1 to form a wet joint 21, as shown in the attached figure 6;
and 7: installing a vibrating beam on a channel steel 53 track, and pouring steel fiber concrete twice in a single width to form a high-crack-resistance concrete leveling layer 5, as shown in the attached figure 7;
and 8: removing the channel steel 53, and pouring a splicing seam of the left and right high-crack-resistance concrete leveling layers 5, as shown in the attached drawings 3 and 5;
and step 9: synchronously spraying high-elastic high-viscosity asphalt and crushed stones with equal particle sizes to form a waterproof bonding stress absorbing layer 6 as shown in figure 1;
step 10: the SBS modified asphalt mixture is adopted for paving and rolling to form an asphalt surface layer 7, as shown in the attached figure 1.
In the step 1, a sleeve bottom plate 9 is arranged at the bottom of the embedded bolt sleeve 8 and is bound with the beam body fixed steel bar 3, and the top of the embedded bolt sleeve 8 is bound with the beam body upper layer steel bar 2; the embedded bolt sleeve 8 is respectively provided with a separated horseshoe-shaped anchoring steel bar 10 and a fixing steel bar 54 which are installed later; the top of the embedded bolt sleeve 8 is provided with a protective nut 12 before the separated horseshoe-shaped anchoring steel bar 10 and the fixing steel bar 54 are installed, as shown in the attached drawings 1, 3, 4, 6 and 7.
In the step 2, the bar brace 49 is constructed by adopting an adjustable single-side small-sized slip form structure, and the adjustable single-side small-sized slip form structure comprises an advancing system, a hopper 25 and an adjustable sliding template; the advancing system consists of vertical supports 26, horizontal supports 29 and transverse connecting supports 30, the three vertical supports 26 and the three horizontal supports 29 form a rectangular frame, the two rectangular frames are connected through the transverse connecting supports 30 and connecting screws 31 to form a rectangular frame, and rollers 33 are arranged on the outer sides of the horizontal supports 29 at the bottom of the rectangular frame through rolling shafts 34; the hopper 25 is arranged at the top of two adjacent vertical supports 26, the top of each vertical support 26 is provided with a concave bayonet 27, the length of the concave bayonets 27 at the two sides is 5-10mm longer than the maximum diameter of the hopper 28, the bottom of the hopper 25 is provided with a discharge port valve, and the valve 28 is positioned in front of the advancing direction of the scraping plate 45; the adjustable sliding template comprises sliding templates 35 on two sides of a bar support 49 and a scraping plate 45 inserted in a scraping plate groove 37 of the sliding template 35, wherein the outer sides of the sliding templates 35 on the two sides are respectively provided with a vibration exciter 36, the end parts of the sliding templates 35 are provided with a plumb rod 41 and a plumb bob 42, the top parts of the sliding templates 35 at the height corresponding to a horizontal support 29 are provided with a row of screw holes 38, the middle parts and the bottom parts of the sliding templates 35 at the height corresponding to the horizontal support 29 are provided with two rows of welding blocks 52, the outer side of each welding block 52 is welded with an adjusting screw 32 vertical to the welding block 52, the scraping plate groove 37 on the top parts of the sliding templates 35 on the two sides are respectively provided with an inclined screw hole 40, and the inclined screw holes 40 are obliquely crossed with the scraping plate groove 37, as shown in.
In the step 2, the adjusting screw 32 on the welding block 52 passes through the screw holes 38 on the vertical supports 26 on the left and right sides, and the gasket 44 and the fixing nut 43 are arranged on the outer sides of the vertical supports 26; a rotary ring plate 51 is arranged on the adjusting screw 32 of the central welding block 52, a rotary slide rod 50 is arranged on one side of the rotary ring plate 51, and a fixing nut 43 is arranged on the outer side of the rotary ring plate 51; the scraping plate 45 can move up and down in the scraping plate groove 37, in the pouring process, the sliding rod 50 is rotated to fix the lower side of the scraping plate 45, the adjusting screw 39 is fixed on the upper side of the scraping plate 45, and sealing strips 46 are arranged in gaps of the scraping plate groove 37, as shown in the attached drawings 8-15.
In the step 4, the embedded bolt sleeves 8 are arranged on the left side and the right side of the strip brace 49 and the channel steel 53 at equal intervals, the embedded bolt sleeves 8 on the two sides are parallel to the strip brace 49 and the channel steel 53, and the interval between the longitudinally adjacent embedded bolt sleeves 8 is 0.5-1 m; the bottom of the fixed steel bar (54) is connected with the embedded bolt sleeve (8), and the top of the fixed steel bar (54) is welded with the side face of the channel steel (53), as shown in the attached figures 2, 5 and 7.
In the step 5, the separated horseshoe-shaped anchoring steel bars 10 are formed by splicing L-shaped steel bars which are symmetrically distributed in pairs, and extrusion sleeves 11 are arranged at the corners of the tops of the separated horseshoe-shaped anchoring steel bars 10 which are symmetrically distributed in pairs; the diameter of the separated horseshoe-shaped anchoring steel bar 10 is the same as the inner diameter of the embedded bolt sleeve 8; the separated horseshoe-shaped anchoring steel bars 10 are arranged at equal intervals of 0.3-0.8 m from top to bottom, left to right, as shown in the attached figures 2 and 5.
In the step 7, the high anti-crack concrete leveling layer 5 is a steel fiber concrete layer which is poured twice in a single width, a longitudinal construction joint is reserved at the middle line of the bridge floor, the anti-collision fences 14 at two sides of the bridge floor and the middle line of the bridge floor are respectively provided with a vibration beam track with the lower parts being strip struts 49 and the upper parts being channel steel 53, as shown in the attached drawings 2, 5 and 7.
In the step 10, the asphalt surface layer 7 at the top is provided with a drainage slope 24, and the side of the anti-collision fence 14 with a lower slope surface is provided with a bridge deck pavement water collecting tank 15, as shown in fig. 16 and 17.
Claims (8)
1. A construction method for paving a composite strong bridge deck is characterized by comprising the following steps:
step 1: measuring and paying off, and constructing a pre-buried bolt sleeve (8) in the beam body (1);
step 2: the distance between the two sliding templates (35) is adjusted by moving a fixing nut (43) on the adjusting screw rod (32) left and right, so that the distance is equal to the width of the bar brace (49); the scraping plate (45) is adjusted to the designated height of the scraping plate groove (37), the scraping plate (45) is fixed by adopting an adjusting screw (39) and a rotary slide rod (50), and a rotary ring plate (51) is fixed on an adjusting screw rod (32) by using a fixing nut (43); aligning a plumb bob (42) on a plumb bob rod (41) with a bar brace (49) marking;
and step 3: pouring concrete (48) into the hopper (25), opening the valve (28), opening the vibration exciter (36), pushing the advancing system forward, and pouring the bar brace (49);
and 4, step 4: installing a channel steel (53) track, placing the channel steel (53) track above the bar brace (49), arranging fixed steel bars (54) on two sides to be connected with embedded bolt sleeves (8) of the beam body (1), and welding the fixed steel bars (54) with the channel steel (53) track;
and 5: roughening and cleaning the top of a beam body (1) of the bridge floor, and installing a separated horseshoe-shaped anchoring steel bar (10) on the top surface of the beam body (1) at a specified position;
step 6: concrete is poured between the adjacent beam bodies (1) to form a wet joint (21);
and 7: installing a vibrating beam on a channel steel (53) track, and pouring steel fiber concrete twice in a single width to form a high-crack-resistance concrete leveling layer (5);
and 8: removing the channel steel (53), and pouring the splicing seams of the left and right high-crack-resistance concrete leveling layers (5);
and step 9: high-elastic high-viscosity asphalt and equal-particle-size crushed stones are synchronously sprayed to form a waterproof bonding stress absorbing layer (6);
step 10: and an SBS modified asphalt mixture is adopted for paving and rolling to form an asphalt surface layer (7).
2. The construction method of composite strong bridge deck pavement according to claim 1, wherein in the step 1, a sleeve bottom plate (9) is arranged at the bottom of the embedded bolt sleeve (8) and is bound with the beam body fixed steel bar (3), and the top of the embedded bolt sleeve (8) is bound with the beam body upper layer steel bar (2); the embedded bolt sleeve (8) is respectively provided with a separated horseshoe-shaped anchoring steel bar (10) and a fixed steel bar (54) which are installed later; and a protective nut (12) is arranged at the top of the embedded bolt sleeve (8) before the separated horseshoe-shaped anchoring steel bar (10) and the fixing steel bar (54) are installed.
3. The construction method of composite strong bridge deck pavement according to claim 1, wherein in the step 2, the braces (49) are constructed by adopting an adjustable one-sided small-sized slip form structure, and the adjustable one-sided small-sized slip form structure comprises an advancing system, a hopper (25) and an adjustable sliding template; the advancing system consists of vertical supports (26), horizontal supports (29) and transverse connecting supports (30), the three vertical supports (26) and the three horizontal supports (29) form a rectangular frame, the two rectangular frames are connected through the transverse connecting supports (30) and connecting screws (31) to form a rectangular frame, and rollers (33) are arranged on the outer sides of the horizontal supports (29) at the bottom of the rectangular frame through rolling shafts (34); the hopper (25) is arranged at the top of two adjacent vertical supports (26), the tops of the two vertical supports (26) are provided with concave bayonets (27), the lengths of the concave bayonets (27) on the two sides are 5-10mm longer than the maximum diameter of the hopper (28), the bottom of the hopper (25) is provided with a valve (28), and the valve (28) is positioned in front of the advancing direction of the scraping plate (45); the adjustable sliding template comprises sliding templates (35) at two sides of a bar brace (49) and a scraping plate (45) inserted in a scraping plate groove (37) of the sliding template (35), the outer sides of the sliding templates (35) at two sides are respectively provided with a vibration exciter (36), the end part of the sliding template (35) is provided with a plumb rod (41) and a plumb bob (42), the top part of the sliding template (35) is provided with a row of screw rod holes (38) at the position corresponding to the horizontal support (29), two rows of welding blocks (52) are arranged at the middle part and the bottom of the sliding template (35) at the height corresponding to the horizontal support (29), an adjusting screw rod (32) perpendicular to the welding blocks (52) is welded at the outer side of each welding block (52), inclined screw holes (40) are respectively arranged at the leveling plate grooves (37) at the tops of the sliding templates (35) at the two sides, and the inclined screw holes (40) are obliquely crossed with the leveling plate grooves (37).
4. The construction method of composite strong bridge deck pavement according to claim 1, wherein in the step 2, the adjusting screw (32) on the welding block (52) passes through the screw hole (38) on the vertical support (26) on the left side and the right side, and a gasket (44) and a fixing nut (43) are arranged on the outer side of the vertical support (26); a rotary ring plate (51) is arranged on an adjusting screw rod (32) of a central welding block (52), a rotary slide rod (50) is arranged on one side of the rotary ring plate (51), and a fixing nut (43) is arranged on the outer side of the rotary ring plate (51); the scraping plate (45) moves up and down in the scraping plate groove (37), in the pouring process, the sliding rod (50) is rotated to fix the lower side of the scraping plate (45), the adjusting screw (39) is used for fixing the upper side of the scraping plate (45), and sealing strips (46) are arranged in the gaps of the scraping plate groove (37).
5. The construction method of composite strong bridge deck pavement according to claim 1, characterized in that in the step 4, embedded bolt sleeves (8) are arranged on the left side and the right side of the rail of the bar brace (49) and the channel steel (53) at equal intervals, the embedded bolt sleeves (8) on the two sides are parallel to the rail of the bar brace (49) and the channel steel (53), and the interval between the longitudinally adjacent embedded bolt sleeves (8) is 0.5-1 m; the bottom of the fixed steel bar (54) is connected with the embedded bolt sleeve (8), and the top of the fixed steel bar (54) is welded with the side face of the channel steel (53).
6. A construction method for paving a composite strong bridge deck according to claim 1, wherein in the step 5, the separated horseshoe-shaped anchoring steel bars (10) are spliced together by two symmetrically distributed L-shaped steel bars, and the two symmetrically distributed separated horseshoe-shaped anchoring steel bars (10) are provided with extrusion type sleeves (11) at the top corners; the diameter of the separated horseshoe-shaped anchoring steel bar (10) is the same as the inner diameter of the embedded bolt sleeve (8); the separated horseshoe-shaped anchoring steel bars (10) are arranged at equal intervals of 0.3-0.8 m from top to bottom, left to right.
7. The construction method of composite strong bridge deck pavement according to claim 1, wherein in the step 7, the high crack-resistant concrete leveling layer (5) is a single-width steel fiber concrete layer which is poured twice, a longitudinal construction joint is reserved at the center line of the bridge deck, and the anti-collision fences (14) at two sides of the bridge deck and the center line of the bridge deck are respectively provided with a vibration beam track with the lower part being a bar brace (49) and the upper part being a channel steel (53).
8. A method of constructing a composite strong deck pavement according to claim 1, wherein in step 10, the asphalt layer (7) is provided with a drainage slope (24), and the side of the crash barrier (14) with a lower slope is provided with a deck pavement water collection trough (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911421496.9A CN110983990B (en) | 2019-12-31 | 2019-12-31 | Construction method for paving composite strong bridge deck |
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| CN201911421496.9A CN110983990B (en) | 2019-12-31 | 2019-12-31 | Construction method for paving composite strong bridge deck |
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| CN110983990A true CN110983990A (en) | 2020-04-10 |
| CN110983990B CN110983990B (en) | 2021-04-06 |
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| CN201911421496.9A Active CN110983990B (en) | 2019-12-31 | 2019-12-31 | Construction method for paving composite strong bridge deck |
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| CN110983990B (en) | 2021-04-06 |
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