CN109537456B - Construction method of water plank road structure - Google Patents
Construction method of water plank road structure Download PDFInfo
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- CN109537456B CN109537456B CN201811377817.5A CN201811377817A CN109537456B CN 109537456 B CN109537456 B CN 109537456B CN 201811377817 A CN201811377817 A CN 201811377817A CN 109537456 B CN109537456 B CN 109537456B
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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
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/005—Piers, trestles, bearings, expansion joints or parapets specially adapted for portable or sectional bridges
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Abstract
The invention provides a construction method of an overwater plank road structure, aiming at the problems that in the prior art, cofferdams need to be arranged for construction of the overwater plank road structure, the construction period is long, and environmental pollution is serious. The construction method of the water plank road structure provided by the invention can accelerate the construction progress and simultaneously can avoid the pollution of cofferdam construction to rivers.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method of an overwater plank road structure.
Background
The existing water trestle structure adopts an integral cast-in-place structure, as shown in fig. 1, a concrete foundation plate 12 is poured above a friction pile 11, a concrete column 13 is arranged on the concrete foundation plate 12, a vertical and horizontal combined distribution beam is arranged on the concrete column 13, the vertical and horizontal combined distribution beam is a vertical and horizontal combined concrete beam 2 ', and a concrete slab is arranged on the vertical and horizontal combined concrete beam 2'.
On the one hand, because set up the concrete column on construction concrete foundation plate, the concrete foundation plate, need processes such as a large amount of reinforcement, template installation, concrete placement, need a large amount of manpowers, material resources, and concrete foundation plate and concrete column need carry out 28 days of maintenance, and the time limit for a project is very long.
On the other hand, because the concrete foundation slab and the concrete column are located below the river surface, a 600 m-long cofferdam needs to be arranged when the concrete foundation slab and the concrete column are constructed, water pumping and dredging are performed, time consumption, labor waste and serious pollution are caused, and the cofferdam in water has certain dangerousness. If the steel sheet pile cofferdam is adopted, the construction cost is high and the construction period is long. If double rows of steel pipe piles are used as cofferdams, although the construction cost is low, the river is easily polluted by filling soil. Meanwhile, the safety of the cofferdam needs to be paid attention at any time in the cofferdam construction process, the water leakage of the cofferdam is avoided, emergency measures need to be taken for preventing the cofferdam from collapsing, and the safety is poor. The cofferdam is constructed for about 12 days, and the construction period is prolonged.
Therefore, how to provide a construction method for a water plank road structure, which can accelerate the construction progress, has moderate cost and can avoid the pollution of cofferdam construction to rivers, has become a technical problem that the building construction industry needs to be further perfected and optimized.
Disclosure of Invention
The invention aims to provide a construction method of an overwater plank road structure, which can accelerate the construction progress and simultaneously avoid the pollution of cofferdam construction to rivers.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses a construction method of an overwater plank road structure, which comprises the following steps:
firstly, construction lofting is carried out, and pile sinking construction of a precast pile is carried out after pile testing;
step two, arranging a flat-padding steel plate with required thickness on the top surface of the precast pile, so that the upper surfaces of the flat-padding steel plates at the top of each precast pile are positioned on the same horizontal plane;
step three, fixedly arranging transverse steel beams above the backing steel plates of the precast piles, wherein the lower part of each transverse steel beam is supported by at least two precast piles, and the transverse steel beams are positioned above the river surface;
step four, connecting the same side ends of adjacent transverse steel beams through a pair of longitudinal steel beams to form a longitudinal and transverse combined distribution beam, wherein the longitudinal steel beams are perpendicular to the transverse steel beams, and the longitudinal steel beams are flush with the upper surfaces of the transverse steel beams;
step five, arranging corrugated plates above the longitudinal and transverse combined distribution beams, wherein the corrugated plates are fixed on the longitudinal steel beams through rivets;
pouring a concrete slab on the corrugated plate, and prefabricating a handrail reserved groove for inserting the bottom of the handrail on the concrete slab;
step seven, fixedly inserting the bottom of the handrail into the handrail reserved groove;
and step eight, paving marble slabs on the upper surface and the two side surfaces of the concrete slab through bonding layers.
Preferably, in the above construction method of the water plank road structure, the pile sinking construction of the precast pile in the first step includes:
(1) pile inserting is carried out according to the positioning of the pile;
(2) after the pile is inserted, checking and correcting the pile position, if the pile is inserted with deviation, lifting the pile until the pile is accurately positioned, then pressing the pile hammer to the pile top to enable the pile to slowly sink into the river, simultaneously checking whether the centers of the pile hammer and the pile cap are consistent with the pile axis or not, checking whether the pile position moves or not, and opening the hammer to perform driving after the checking is correct;
(3) the pile driver adopts a guide rod type diesel pile driver, when the pile driver starts to drive the pile, the pile driver needs to slowly drive and tap, the impact energy of the pile hammer is not too large, the impact energy of the pile hammer can be gradually increased along with the driving of the pile, when the pile driver drives the pile, two theodolites are used for monitoring the verticality of a pile body at an included angle of 90 degrees between the front side and the back side of the pile, if the pile is found to be inclined, the pile driver immediately corrects the pile, and the pile driver is driven after the pile driver;
(4) and when the pile is driven to a position 1m above the natural water surface, a steel pile conveying pipe is adopted to convey the pile to a designed elevation.
Preferably, in the above construction method of the water plank road structure, in the fifth step, the corrugated plates are installed in a straight-line manner from one side to the other side, and position correction is performed once every installation span, and if deviation occurs, a jack is used for correcting the deviation.
Preferably, in the construction method of the above-mentioned water plank road structure, the longitudinal steel beam, the transverse steel beam and the corrugated plate need to be sand blasted for rust removal, and the sand blasting for rust removal comprises three paints: the primer adopts epoxy zinc-rich paint for rust prevention, the intermediate paint also adopts epoxy zinc-rich paint for further rust prevention, and the finish paint adopts polyurethane paint for no color loss.
Preferably, in the above construction method of the water plank road structure, the concrete slab is provided with a handrail pre-groove for inserting the bottom of the handrail.
Preferably, in the construction method of the above water plank road structure, the construction method further comprises a steel plate bolt, wherein the steel plate bolt comprises a horizontal plate and a vertical plate, the horizontal plate is fixed on the corrugated plate, the vertical plate is vertically fixed in the middle of the horizontal plate, and the bottom of the handrail is provided with a vertical groove into which the vertical plate of the steel plate bolt extends.
Preferably, in the above construction method of an above water plank road structure, the sixth step of pouring the concrete slab specifically includes the following steps:
(1) before concrete is poured, the template is watered and moistened, and a cleaning opening is sealed after sundries and accumulated water are removed;
(2) the pouring method is to start to be propelled by a 'slurry driving method' from one end, the virtual paving thickness of the plate pouring is slightly larger than the plate thickness, the plate is vibrated by an insertion vibrator, the insertion vibrator is inserted quickly and pulled slowly, insertion points are arranged uniformly and moved point by point in sequence, omission is avoided, uniform compaction is achieved, the moving distance is not more than 1.5 times of the action radius of a vibrating rod, the lower layer concrete surface is inserted 50mm when the upper layer is vibrated, so as to eliminate the joint between the two layers, the thickness of the concrete plate is controlled by continuously checking by using a moving mark or an insertion rod, the vibrating is finished, and the surface is leveled by a scraping ruler or a planker;
(3) when the formwork is removed, the strength of the concrete must reach 70% of the design grade, and the difference between the surface temperature of the concrete and the ambient temperature must not exceed 25 ℃ so as to prevent the surface of the concrete from generating cracks;
(4) covering within 12 hours after the concrete is poured, and watering and maintaining; on the concrete water curing date, the addition of the slow-setting admixture or the concrete with the impermeability requirement is not less than 14 days, the trampling or construction vibration is not required on the concrete until the strength of the concrete reaches 1.2MPa, and the watering times per day can keep the concrete in a sufficient wet state.
Preferably, in the above construction method of the water plank road structure, the concrete slab should be poured continuously, if it is necessary to be intermittent, the secondary concrete should be poured before the initial setting of the front concrete, the maximum time of the intermittent should be determined according to the cement variety and the initial setting condition of the concrete, and the concrete should be treated according to the construction joint after more than 2 hours.
Preferably, in the above construction method of the water plank road structure, in the sixth step, when the concrete slab is poured, a specially-assigned person should be sent to observe whether the template steel bars, the reserved holes, the embedded parts, the inserted bars and the like have displacement deformation or blockage, if a problem is found, the pouring should be stopped immediately, and the concrete slab should be finished before the poured concrete is initially set.
According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, the construction method of the overwater plank road structure provided by the invention has the advantages that the longitudinal and transverse combined distribution beams are changed into the longitudinal steel beams and the transverse steel beams from the original longitudinal concrete beams and transverse concrete beams, and the self weight is greatly reduced on the premise that the bearing capacity is basically unchanged, so that the components such as the longitudinal and transverse combined distribution beams, the concrete plates, the railings and the like can be borne only by precast piles, and the foundation plates and the concrete columns below the river surface are not required to be adopted to support the components above like the prior art, on one hand, the maintenance time of the foundation plates, the concrete columns, the longitudinal concrete beams and the transverse concrete beams can be saved, and the construction period can be effectively saved; on the other hand, the problem that a 600m long cofferdam needs to be arranged for pouring an underwater foundation plate and a concrete column is avoided, the construction period of the cofferdam is saved, a dangerous source is effectively avoided, the safety of the cofferdam needs to be noticed at any time in the cofferdam construction process, the water leakage accident of the cofferdam is avoided, the problems that the construction cost is high and the construction period is long if a steel sheet pile cofferdam is adopted and the problem that the river is easily polluted if filling caused by adopting double rows of steel pipe piles to form the cofferdam are avoided. On the other hand, the longitudinal and transverse combined distribution beam is changed into a steel member, namely a longitudinal steel beam and a transverse steel beam, so that the working procedures of binding steel bars, installing templates, pouring concrete and the like can be reduced in the construction process, and a large amount of manpower and material resources are saved.
Drawings
FIG. 1 is a schematic structural diagram of a conventional water plank road structure;
FIG. 2 is a schematic structural diagram of an embodiment of an aquatic plank road structure;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a schematic distribution diagram of the crossbar assembly distribution beam according to an embodiment of the present invention.
In the figure: the concrete-reinforced concrete composite structure comprises 1-precast piles, 2-longitudinal and transverse combined distribution beams, 2' -longitudinal and transverse combined concrete beams, 21-transverse steel beams, 22-longitudinal steel beams, 3-corrugated plates, 4-concrete plates, 41-rail preformed grooves, 5-rails, 51-first cylinders, 52-second cylinders, 6-bonding layers, 7-marble plates, 8-steel plate bolts, 81-horizontal plates, 82-vertical plates, 9-river surfaces, 10-river bottoms, 11-friction piles, 12-concrete foundation plates and 13-concrete columns.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
Referring to fig. 2 to 4, the present invention discloses a construction method of an above-water plank road structure, including the following steps:
firstly, construction lofting is carried out, pile sinking construction of a precast pile 1 is carried out after pile testing, and the precast pile extends into a river bottom 10;
step two, arranging a flat-padded steel plate (not marked) with required thickness on the top surface of each precast pile 1, so that the upper surfaces of the flat-padded steel plates at the top of each precast pile 1 are positioned on the same horizontal plane;
step three, fixedly arranging transverse steel beams 21 above the backing steel plates of the precast piles 1, wherein the lower part of each transverse steel beam 21 is supported by at least two precast piles 1, and the transverse steel beams 21 are positioned above the river surface 9;
step four, the same side ends of the adjacent transverse steel beams 21 are respectively connected through a pair of longitudinal steel beams 22 to form a longitudinal and transverse combined distribution beam 2, the longitudinal steel beams 22 are perpendicular to the transverse steel beams 21, and the longitudinal steel beams 22 are flush with the upper surfaces of the transverse steel beams 21;
step five, arranging corrugated plates 3 above the longitudinal and transverse combined distribution beam 2, wherein the corrugated plates 3 are fixed on the longitudinal steel beams 22 through rivets;
sixthly, pouring a concrete plate 4 on the corrugated plate 3, and prefabricating a railing preformed groove for inserting the bottom of the railing 5 on the concrete plate 4;
step seven, fixedly inserting the bottom of the handrail 5 into the handrail reserved groove;
and step eight, paving marble slabs 7 on the upper surface and two side surfaces of the concrete slab 4 through adhesive layers 6.
Compared with the prior art, the construction method of the water trestle structure provided by the invention has the advantages that the longitudinal and transverse combined distribution beams 2 are changed into the longitudinal steel beams 22 and the transverse steel beams 21 from the original longitudinal concrete beams and transverse concrete beams, and the self weight is greatly reduced on the premise that the bearing capacity is basically unchanged, so that the components such as the longitudinal and transverse combined distribution beams 2, the concrete plates 4, the railings 5 and the like can be borne only by the precast piles 1, and the foundation plate and the concrete columns below the river surface 9 are not required to be adopted to support the components above, so that on one hand, the maintenance time of the foundation plate, the concrete columns, the longitudinal concrete beams and the transverse concrete beams can be saved, and the saved construction period can be estimated to be 40 days; on the other hand, the problem that a 600m long cofferdam needs to be arranged for pouring an underwater foundation plate and a concrete column is avoided, the construction period of the cofferdam is saved, a dangerous source is effectively avoided, the safety of the cofferdam needs to be noticed at any time in the cofferdam construction process, the water leakage accident of the cofferdam is avoided, the problems that the construction cost is high and the construction period is long if a steel sheet pile cofferdam is adopted and the problem that the river is easily polluted if filling caused by adopting double rows of steel pipe piles to form the cofferdam are avoided. On the other hand, the longitudinal and transverse combined distribution beam 2 is changed into a steel member, namely a longitudinal steel beam 22 and a transverse steel beam 21, so that the working procedures of steel bar binding, template installation, concrete pouring and the like can be reduced in the construction process, and a large amount of manpower and material resources are saved.
Preferably, in the above construction method of the water plank road structure, the pile sinking construction of the precast pile 1 in the first step includes:
(1) pile inserting is carried out according to the positioning of the pile;
(2) after the pile is inserted, checking and correcting the pile position, if the pile is inserted with deviation, lifting the pile until the pile is accurately positioned, then pressing the pile hammer to the pile top to enable the pile to slowly sink into the river, simultaneously checking whether the centers of the pile hammer and the pile cap are consistent with the pile axis or not, checking whether the pile position moves or not, and opening the hammer to perform driving after the checking is correct;
(3) the pile driver adopts a guide rod type diesel pile driver, when the pile driver starts to drive the pile, the pile driver needs to slowly drive and tap, the impact energy of the pile hammer is not too large, the impact energy of the pile hammer can be gradually increased along with the driving of the pile, when the pile driver drives the pile, two theodolites are used for monitoring the verticality of a pile body at an included angle of 90 degrees between the front side and the back side of the pile, if the pile is found to be inclined, the pile driver immediately corrects the pile, and the pile driver is driven after the pile driver;
(4) and when the pile is driven to a position 1m above the natural water surface, a steel pile conveying pipe is adopted to convey the pile to a designed elevation.
By adopting the pile sinking construction method, the perpendicularity of the precast pile 1 can be ensured, and the precast pile 1 can be protected from being damaged in the pile sinking process.
Preferably, in the above construction method of the water plank road structure, in the fifth step, the corrugated plates 3 are installed in a straight-line manner from one side to the other side, position correction is performed once every installation span, and if deviation occurs, a jack is used for correcting the deviation, so that the corrugated plates 3 are ensured to be in place correctly.
Preferably, in the above construction method of the water plank road structure, the longitudinal steel beam 22, the transverse steel beam 21 and the corrugated plate 3 need to be sand blasted for rust removal, and the sand blasting for rust removal comprises three paints: the primer adopts epoxy zinc-rich paint for rust prevention, the intermediate paint also adopts epoxy zinc-rich paint for further rust prevention, and the finish paint adopts polyurethane paint for no color loss. Can effectively prevent vertical girder steel 22, horizontal girder steel 21 and buckled plate 3 rust and lose the look like this, prolong its life.
In order to reliably connect the handrail 5 with the concrete slab 4, it is preferable that in the above construction method of the water plank road structure, the concrete slab 4 is provided with a handrail pre-groove for inserting the bottom of the handrail 5.
Preferably, in the construction method of the above-mentioned water plank road structure, the construction method further comprises a steel plate plug 8, the steel plate plug 8 comprises a horizontal plate 81 and a vertical plate 82, the horizontal plate 81 is fixed on the corrugated plate 3, the vertical plate 82 is vertically fixed at the middle part of the horizontal plate 81, the lower part of the handrail 5 is a step body, the step body comprises a first cylinder 51 and a second cylinder 52, the first cylinder 51 and the second cylinder 52 are coaxially arranged, the first cylinder 51 is arranged below the second cylinder 52, the outer diameter of the first cylinder 51 is larger than that of the second cylinder 52, the handrail reserve groove is a cylindrical groove, the outer diameter of the first cylinder 51 is matched with the inner diameter of the handrail reserve groove, the first cylinder 51 is inserted into the handrail reserve groove, the thickness of the first cylinder 51 is equal to the depth of the handrail reserve groove minus the thickness of the horizontal plate 81 of the steel plate plug 8, the bottom of the first cylinder 51 is provided with a vertical groove for inserting a vertical plate 82 of a steel plate bolt 8, and an adhesive layer 6 and a marble plate 7 which are positioned above the concrete plate 4 cover the step surface between the first cylinder 51 and the second cylinder 52.
On the one hand, through setting up steel sheet bolt 8, steel sheet bolt 8's horizontal plate 81 and buckled plate 3 fixed connection, steel sheet bolt 8's vertical board 82 is inserted in the vertical recess of seting up in the bottom of the first cylinder 51 portion of the lower part of railing 5 in, can be so that railing 5 and buckled plate 3 form reliable connection, improve the security. On the other hand, the step body of the lower part of the handrail 5 adopts a first cylinder 51 and a second cylinder 52, the first cylinder 51 is arranged below the second cylinder 52, the outer diameter of the first cylinder 51 is larger than that of the second cylinder 52, the first cylinder 51 is inserted into the handrail reserve groove, the outer diameter of the first cylinder 51 matches with the inner diameter of the handrail reserve groove, the thickness of the first cylinder 51 is equal to the depth of the handrail reserve groove minus the thickness of the horizontal plate 81 of the steel plate plug 8, the adhesive layer 6 and the marble plate 7 above the concrete plate 4 cover the step surface between the first cylinder 51 and the second cylinder 52, i.e. the adhesive layer 6 above the concrete plate 4 and the marble plate 7 cover the upper surface of the first cylinder 51, the concrete plate 4 can play a role in preventing the first cylinder 51 from shaking left and right, and the marble plate 7 can prevent the first cylinder 51 from moving upwards, the pullout resistance and stability of the first cylinder 51 are improved, thereby improving the safety of the balustrade 5.
Preferably, in the above construction method of the water plank road structure, in the sixth step, the concrete slab 4 is poured specifically including the following steps:
(1) before concrete is poured, the template is watered and moistened, and a cleaning opening is sealed after sundries and accumulated water are removed;
(2) the pouring method is to start to be propelled by a 'slurry driving method' from one end, the virtual paving thickness of the plate pouring is slightly larger than the plate thickness, the plate is vibrated by an insertion vibrator, the insertion vibrator is inserted quickly and pulled slowly, insertion points are arranged uniformly and moved point by point, the insertion points are moved in sequence without omission, uniform compaction is realized, the compactness of the concrete plate 4 is ensured, the moving distance is not more than 1.5 times of the action radius of a vibrating rod, the concrete surface of the lower layer is inserted 50mm when the upper layer is vibrated, so that the joint between the two layers is eliminated, the thickness of the concrete plate 4 is controlled by continuously using a moving mark or an insertion rod for inspection, and the surface is leveled by a scraper or a planker after the vibrating is finished;
(3) when the formwork is removed, the strength of the concrete must reach 70% of the design grade, and the difference between the surface temperature of the concrete and the ambient temperature must not exceed 25 ℃ so as to prevent the surface of the concrete from generating cracks;
(4) covering within 12 hours after the concrete is poured, and watering and maintaining; on the concrete water curing date, the addition of the slow-setting admixture or the concrete with the impermeability requirement is not less than 14 days, the trampling or construction vibration is not required on the concrete until the strength of the concrete reaches 1.2MPa, and the watering times per day can keep the concrete in a sufficient wet state.
In this embodiment, the method for casting the concrete slab 4 can ensure the compactness of the concrete slab 4, prevent cracks from being generated on the surface of the concrete, and improve the casting quality of the concrete slab 4.
In order to improve the pouring quality of the concrete slab 4, it is preferable that in the above construction method of the water plank road structure, the concrete slab 4 should be poured continuously, if it is necessary to be intermittently poured, the secondary concrete should be poured before the initial setting of the concrete of the previous layer, the maximum time of the intermittent operation should be determined according to the cement type and the initial setting condition of the concrete, and the construction joint should be processed for more than 2 hours.
In order to prevent the template steel bars, the reserved holes, the embedded parts and the inserted bars from being deformed or blocked, preferably, in the construction method of the water plank road structure, in the sixth step, when the concrete slab 4 is poured, a specially-assigned person is required to observe whether the template steel bars, the reserved holes, the embedded parts, the inserted bars and the like are deformed or blocked, the pouring is stopped immediately when a problem is found, and the concrete is finished before the initial setting of the poured concrete.
Referring to fig. 2 to 4, the present embodiment discloses an above-water plank road structure, which comprises a plurality of precast piles 1, a vertical and horizontal combined distribution beam 2, a corrugated plate 3, a concrete slab 4 and a railing 5, the longitudinal and transverse combined distribution beam 2 is arranged above the precast pile 1, the corrugated plate 3 is arranged above the longitudinal and transverse combined distribution beam 2, the concrete plate 4 is arranged above the corrugated plate 3, the railings 5 are arranged on two sides of the concrete plate 4, the longitudinal and transverse combined distribution beam 2 comprises a plurality of transverse steel beams 21 and a plurality of longitudinal steel beams 22, the transverse steel beams 21 are respectively arranged on at least two precast piles 1, and a plurality of horizontal girder steels 21 parallel arrangement, the both ends of adjacent horizontal girder steel 21 are connected through corresponding vertical girder steel 22 respectively, just vertical girder steel 22 with the upper surface of horizontal girder steel 21 flushes.
Compared with the prior art, the water trestle structure provided by the invention has the advantages that the longitudinal and transverse combined distribution beams 2 are changed into the longitudinal steel beams 22 and the transverse steel beams 21 from the original longitudinal concrete beams and transverse concrete beams, and the self weight is greatly reduced on the premise that the bearing capacity is basically unchanged, so that the components such as the longitudinal and transverse combined distribution beams 2, the concrete plates 4, the railings 5 and the like can be borne only by the precast piles 1, and the foundation plate and the concrete columns below the river surface 9 are not required to be used for supporting the components above unlike the prior art, on one hand, the maintenance time of the foundation plate, the concrete columns, the longitudinal concrete beams and the transverse concrete beams can be saved, and the construction period can be estimated to be saved by 40 days; on the other hand, the problem that a 600m long cofferdam needs to be arranged for pouring an underwater foundation plate and a concrete column is avoided, the construction period of the cofferdam is saved, a dangerous source is effectively avoided, the safety of the cofferdam needs to be noticed at any time in the cofferdam construction process, the water leakage accident of the cofferdam is avoided, the problems that the construction cost is high and the construction period is long if a steel sheet pile cofferdam is adopted and the problem that the river is easily polluted if filling caused by adopting double rows of steel pipe piles to form the cofferdam are avoided. On the other hand, the longitudinal and transverse combined distribution beam 2 is changed into a steel member, namely a longitudinal steel beam 22 and a transverse steel beam 21, so that the working procedures of steel bar binding, template installation, concrete pouring and the like can be reduced in the construction process, and a large amount of manpower and material resources are saved.
In order to ensure that the transverse steel beam 21 is horizontally arranged and the safety of the whole water plank road structure is ensured, preferably, in the water plank road structure, the top surface of each precast pile 1 is provided with a leveling steel plate (not marked) with required thickness, so that the upper surfaces of the leveling steel plates on the top surfaces of the precast piles 1 are positioned on the same horizontal plane, and the transverse steel beam 21 is connected with the leveling steel plates in a welding mode.
Preferably, in the above water plank road structure, the thickness of the concrete slab 4 is 100-150 mm. Because the longitudinal and transverse combination distribution beam 2 composed of the longitudinal steel beams 22 and the transverse steel beams 21 has bearing capacity, the concrete slab 4 only needs to be 100-150mm, and the thickness is almost reduced by half compared with the thickness of 200-250mm in the prior art.
Preferably, in the above water plank road structure, the upper surface and the two side surfaces of the concrete slab 4 are respectively provided with a marble slab 7 through the adhesive layers 6, and the marble slabs 7 are adopted, so that the concrete slab 4 can be effectively protected, and the plank road structure can be beautified.
In order to improve the installation stability of the balustrade 5, it is preferable that in the above-mentioned water plank road structure, the concrete slab 4 is provided with a balustrade pre-groove (not shown) for inserting the lower part of the balustrade 5.
Preferably, in foretell plank road structure on water, still include steel sheet bolt 8, steel sheet bolt 8 includes horizontal plate 81 and vertical board 82, horizontal plate 81 is fixed in on buckled plate 3, vertical board 82 vertical fixation in the middle part of horizontal plate 81, the lower part of railing 5 is a step body, the step body includes first cylinder 51 and second cylinder 52, first cylinder 51 and second cylinder 52 coaxial setting, first cylinder 51 set up in the below of second cylinder 52, the external diameter of first cylinder 51 is greater than the second cylinder 52, the railing preformed groove is the cylinder type recess, the external diameter of first cylinder 51 with the internal diameter phase-match of railing preformed groove, first cylinder 51 is inserted and is arranged in the railing preformed groove, the thickness of first cylinder 51 equals the degree of depth of railing preformed groove and subtracts the thickness of horizontal plate 81 of steel sheet bolt 8, the bottom of the first cylinder 51 is provided with a vertical groove for inserting a vertical plate 82 of a steel plate bolt 8, and an adhesive layer 6 and a marble plate 7 which are positioned above the concrete plate 4 cover the step surface between the first cylinder 51 and the second cylinder 52.
On the one hand, through setting up steel sheet bolt 8, steel sheet bolt 8's horizontal plate 81 and buckled plate 3 fixed connection, steel sheet bolt 8's vertical board 82 is inserted in the vertical recess of seting up in the bottom of the first cylinder 51 portion of the lower part of railing 5 in, can be so that railing 5 and buckled plate 3 form reliable connection, improve the security. On the other hand, the step body of the lower part of the handrail 5 adopts a first cylinder 51 and a second cylinder 52, the first cylinder 51 is arranged below the second cylinder 52, the outer diameter of the first cylinder 51 is larger than the second cylinder 52, the first cylinder 51 is inserted into the handrail reserve groove, the outer diameter of the first cylinder 51 matches with the inner diameter of the handrail reserve groove, the thickness of the first cylinder 51 is equal to the depth of the handrail reserve groove minus the thickness of the horizontal plate 81 of the steel plate plug 8, the adhesive layer 6 and the marble plate above the concrete plate 4 cover the step surface between the first cylinder 51 and the second cylinder 52, i.e. the adhesive layer 6 above the concrete plate 4 and the marble plate cover the upper surface of the first cylinder 51, the concrete plate 4 can play a role in preventing the first cylinder 51 from shaking left and right, and the marble plate can prevent the first cylinder 51 from moving upwards, the pullout resistance and stability of the first cylinder 51 are improved, thereby improving the safety of the balustrade 5.
Preferably, in the above water plank road structure, the surfaces of the longitudinal steel beams 22, the transverse steel beams 21 and the corrugated plates 3 are subjected to sand blasting for rust removal. Specifically, in the water plank road structure in the embodiment, the surfaces of the longitudinal steel beam 22, the transverse steel beam 21 and the corrugated plate 3 are sequentially provided with three layers of paint: the primer adopts epoxy zinc-rich paint for rust prevention, the intermediate paint also adopts epoxy zinc-rich paint for further rust prevention, and the finish paint adopts polyurethane paint for ensuring that the surfaces of the longitudinal steel beam 22, the transverse steel beam 21 and the corrugated plate 3 do not lose color.
Preferably, in the above-described water plank road structure, the combined longitudinal and transverse beams are positioned above the river surface 9.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (7)
1. A construction method of an overwater plank road structure is characterized by comprising the following steps:
firstly, construction lofting is carried out, and pile sinking construction of a precast pile is carried out after pile testing;
step two, arranging a flat-padding steel plate with required thickness on the top surface of the precast pile, so that the upper surfaces of the flat-padding steel plates at the top of each precast pile are positioned on the same horizontal plane;
step three, fixedly arranging transverse steel beams above the backing steel plates of the precast piles, wherein the lower part of each transverse steel beam is supported by at least two precast piles, and the transverse steel beams are positioned above the river surface;
step four, connecting the same side ends of adjacent transverse steel beams through a pair of longitudinal steel beams to form a longitudinal and transverse combined distribution beam, wherein the longitudinal steel beams are perpendicular to the transverse steel beams, and the longitudinal steel beams are flush with the upper surfaces of the transverse steel beams;
step five, arranging corrugated plates above the longitudinal and transverse combined distribution beams, wherein the corrugated plates are fixed on the longitudinal steel beams through rivets;
pouring a concrete slab on the corrugated plate, and prefabricating a handrail reserved groove for inserting the bottom of the handrail on the concrete slab;
step seven, fixedly inserting the bottom of the handrail into the handrail reserved groove;
step eight, paving marble slabs on the upper surface and two side surfaces of the concrete slab through bonding layers,
a steel plate bolt is also adopted, the steel plate bolt comprises a horizontal plate and a vertical plate, the horizontal plate is fixed on the corrugated plate, the vertical plate is vertically fixed in the middle of the horizontal plate, the lower part of the railing is a step body, the step body comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are coaxially arranged, the first cylinder is arranged below the second cylinder, the outer diameter of the first cylinder is larger than that of the second cylinder, the handrail reserve groove is a cylindrical groove, the outer diameter of the first cylinder is matched with the inner diameter of the handrail reserve groove, the first cylinder is inserted into the handrail reserve groove, the thickness of the first cylinder is equal to the thickness of the handrail reserve groove minus the thickness of the horizontal plate of the steel plate plug pin, the bottom of the first cylindrical part is provided with a vertical groove for inserting a vertical plate of a steel plate bolt, and the bonding layer and the marble plate which are positioned above the concrete plate cover the step surface between the first cylinder and the second cylinder.
2. The construction method of the water plank road structure of claim 1, wherein the pile sinking construction of the precast pile in the first step comprises:
(1) pile inserting is carried out according to the positioning of the pile;
(2) after the pile is inserted, checking and correcting the pile position, if the pile is inserted with deviation, lifting the pile until the pile is accurately positioned, then pressing the pile hammer to the pile top to enable the pile to slowly sink into the river, simultaneously checking whether the centers of the pile hammer and the pile cap are consistent with the pile axis or not, checking whether the pile position moves or not, and opening the hammer to perform driving after the checking is correct;
(3) the pile driver adopts a guide rod type diesel pile driver, when the pile driver starts to drive the pile, the pile driver needs to slowly drive and tap, the impact energy of the pile hammer is not too large, the impact energy of the pile hammer is gradually increased along with the driving of the pile, when the pile driver drives the pile, two theodolites are used for monitoring the verticality of a pile body at an included angle of 90 degrees between the front side and the back side of the pile, if the pile is deviated, the verticality is immediately corrected, and the pile driver is driven after the verticality is fixed;
(4) and when the pile is driven to a position 1m above the natural water surface, a steel pile conveying pipe is adopted to convey the pile to a designed elevation.
3. The construction method of the water plank road structure of claim 1, wherein in the fifth step, corrugated plates are installed from one side to the other side in the same direction, and position correction is performed once every installation span, and if deviation occurs, a jack is used for correcting the deviation.
4. The construction method of the water plank road structure of claim 1, wherein the longitudinal steel beams, the transverse steel beams and the corrugated plates need to be sand blasted for rust removal, and the sand blasting for rust removal comprises three paints: the primer adopts epoxy zinc-rich paint for rust prevention, the intermediate paint also adopts epoxy zinc-rich paint for further rust prevention, and the finish paint adopts polyurethane paint for no color loss.
5. The construction method of the water plank road structure of claim 1, wherein in the sixth step, the concrete slab casting specifically comprises the following steps:
(1) before concrete is poured, the template is watered and moistened, and a cleaning opening is sealed after sundries and accumulated water are removed;
(2) the pouring method is to start to be propelled by a 'slurry driving method' from one end, the virtual paving thickness of the plate pouring is slightly larger than the plate thickness, the plate is vibrated by an insertion vibrator, the insertion vibrator is inserted quickly and pulled slowly, insertion points are arranged uniformly and moved point by point in sequence, omission is avoided, uniform compaction is achieved, the moving distance is not more than 1.5 times of the action radius of a vibrating rod, the lower layer concrete surface is inserted 50mm when the upper layer is vibrated, so as to eliminate the joint between the two layers, the thickness of the concrete plate is controlled by continuously checking by using a moving mark or an insertion rod, the vibrating is finished, and the surface is leveled by a scraping ruler or a planker;
(3) when the formwork is removed, the strength of the concrete must reach 70% of the design grade, and the difference between the surface temperature of the concrete and the ambient temperature must not exceed 25 ℃ so as to prevent the surface of the concrete from generating cracks;
(4) covering within 12 hours after the concrete is poured, and watering and maintaining; on the concrete water curing date, the addition of the slow-setting admixture or the concrete with the impermeability requirement is not less than 14 days, the trampling or construction vibration is not required on the concrete until the strength of the concrete reaches 1.2MPa, and the watering times per day can keep the concrete in a sufficient wet state.
6. The construction method of the water plank road structure of claim 5, wherein the concrete slab should be poured continuously, if it is necessary to be intermittent, the secondary concrete should be poured before the initial setting of the front concrete, the maximum time of the intermittent should be determined according to the cement variety and the initial setting condition of the concrete, and the construction joint should be processed for more than 2 hours.
7. The construction method of the water plank road structure of claim 5, wherein in the sixth step, when the concrete slab is poured, a specially-assigned person should be sent to observe whether the form steel bar, the reserved hole, the embedded part and the dowel bar have displacement deformation or blockage, the pouring should be stopped immediately when the problem is found, and the concrete slab should be finished before the initial setting of the poured concrete.
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