CN110184921B - Construction method of steel box-concrete combined beam hoisting system - Google Patents
Construction method of steel box-concrete combined beam hoisting system Download PDFInfo
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- CN110184921B CN110184921B CN201910351273.3A CN201910351273A CN110184921B CN 110184921 B CN110184921 B CN 110184921B CN 201910351273 A CN201910351273 A CN 201910351273A CN 110184921 B CN110184921 B CN 110184921B
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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
- E01D2101/00—Material constitution of bridges
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Abstract
The invention relates to a construction method of a steel box-concrete combined beam hoisting system, which comprises the following steps: 1) construction preparation; 2) laying a construction support; 3) splicing construction of the steel box; 4) pouring concrete; 5) and (5) tensioning construction of the prestressed cable bundles. The invention has the beneficial effects that: the construction support is convenient to install on site and good in integrity, and effectively reduces the on-site construction time of a concrete foundation and the difficulty in installing and positioning the transverse Bailey beam; meanwhile, the beam side guardrail and the transverse Bailey beam are convenient to install and connect, and the installation cost of the guardrail can be saved; the steel box is high in mounting and positioning accuracy and easy to move, and fastening force can be applied to the steel box through the beam top clamping plate, so that the difficulty of welding construction is reduced; meanwhile, the adjustable inner support is arranged in the steel box, so that the integrity of the steel box can be improved, and the utilization rate of materials can be improved.
Description
Technical Field
The invention relates to a construction method of a steel box-concrete combined beam hoisting system, which improves the integrity of a construction structure, reduces the difficulty of hoisting and positioning a steel box beam, improves the quality of concrete pouring and improves the construction quality of a prestressed cable bundle, belongs to the field of bridge engineering and is suitable for the construction engineering of the steel box-concrete combined beam.
Background
The steel box-concrete combined beam is a novel combined section beam combining the characteristics of a superposed combined beam and a steel pipe concrete, and has the remarkable advantages that the steel beam and the concrete can exert respective material advantages, a faster construction progress is obtained by a prefabricating and assembling method, and economic and technical advantages are realized. In the construction practice of the steel box-concrete combined beam, the technical key points of engineering technicians are to ensure the hoisting construction precision of the steel box and the pouring quality of concrete.
The construction method is characterized by comprising the steps of designing a steel box girder splicing positioner device by self, and deducing a general calculation formula of a steel box girder section splicing surface corner control value and an axial deformation environment temperature regulating quantity through theoretical analysis of a system according to the splicing precision requirement of the steel box girder. The construction method can ensure the hoisting precision of the steel box and improve the construction safety to a certain extent, but the actual operation is more complicated, and the construction technology such as concrete pouring quality control is not involved.
In summary, the existing construction method has a good effect under a proper working condition, but further research is needed in the aspects of improving the integrity of a construction structure, ensuring the concrete pouring quality and the like. In view of this, the invention is urgently needed to provide a construction method of a steel box-concrete combined beam hoisting system, which improves the integrity of a construction structure, reduces the difficulty of hoisting and positioning a steel box beam, improves the quality of concrete pouring and improves the construction quality of a prestressed cable bundle.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the construction method of the steel box-concrete combined beam hoisting system, which can not only improve the integrity of a construction structure, but also reduce the difficulty in hoisting and positioning the steel box beam, improve the concrete pouring quality and improve the construction quality of the prestressed cable bundles.
The construction method of the steel box-concrete combined beam hoisting system comprises the following steps:
1) construction preparation: determining the spatial position of the steel box-concrete combined beam through field surveying and mapping, preparing construction devices and materials required by construction, and carrying out field assembly on each construction member;
2) laying a construction support: placing the prefabricated foundation on the upper part of a foundation soil layer, splicing and connecting the connecting convex tenons and the connecting tongues and tongues on the prefabricated foundation, then placing the connecting cap plate which is firmly connected with the column bottom boot leg on the upper part of the prefabricated foundation, arranging a cap bottom leveling layer between the prefabricated foundation and the connecting cap plate, then firmly connecting the connecting cap plate with the prefabricated foundation through foundation tie bars, and applying fastening force to the prefabricated foundation; the column bottom boot leg is connected with the vertical support column and is positioned above the connecting cap plate; column side supporting plates are arranged at the height of the vertical supporting columns from 1/3-1/4 of the top of the vertical supporting columns, and supporting column cross connection is arranged between the opposite column side supporting plates; a column top transverse plate, a supporting cross beam and a transverse Bailey beam are sequentially arranged at the top of the vertical support column, and a beam top transverse support is arranged at the joint of the supporting cross beam and the transverse Bailey beam; a beam side guardrail is arranged at the outer end part of the transverse Bailey beam, and a guardrail lower bearing plate, a guardrail upper bearing plate and the transverse Bailey beam are connected into a whole through a guardrail fastening bolt;
3) splicing construction of the steel box: adjustable inner supports are arranged in the end box girder and the middle box girder; a Bailey beam connector is arranged on the transverse Bailey beam; the Bailey beam connector consists of a beam top clamping plate, a beam bottom clamping plate and a clamping plate connecting bolt, the beam top clamping plate and the beam bottom clamping plate are respectively positioned on the upper surface and the lower surface of the transverse Bailey beam, and the beam top clamping plate, the beam bottom clamping plate and the transverse Bailey beam are fixedly connected through the clamping plate connecting bolt; a leveling cushion block is arranged between the bottom of the end box girder and the transverse Bailey girder, an end inclined strut and an inclined strut connecting plate are arranged between the outer side of the end box girder and the Bailey girder connecting body, and the end inclined strut is connected with the girder top clamping plate in a welding way; arranging a vertical aligning body on a transverse Bailey beam, wherein the vertical aligning body is positioned between the bottom of a middle box beam and the transverse Bailey beam, the transverse aligning body is arranged on the outer side of the middle box beam, the vertical aligning body adopts a hydraulic jack, the transverse aligning body consists of a screw and a bolt, and then a vertical supporting plate is arranged between the transverse aligning body and a Bailey beam connecting body; after the horizontal position and the vertical position of the middle box girder are corrected by synchronously adopting the horizontal correcting body and the vertical correcting body, the vertical correcting body is replaced by the leveling cushion block; a splicing clamp is arranged at the upper part of a box girder vertical plate connected with the end box girder and the middle box girder;
4) and (3) concrete pouring construction: laying support supporting plates between adjacent transverse Bailey beams, and firmly connecting the support supporting plates with support sliding grooves, wherein the support sliding grooves are formed in the upper surfaces of the support supporting plates; the support bottom plate is positioned above the support sliding groove, a support sliding rail is arranged between the support bottom plate and the support sliding groove, a vertical anchoring rod and a bottom anchoring plate are arranged between the support bottom plate and the transverse Bailey beam, and a support supporting column and a support cross beam are sequentially arranged at the upper part of the support bottom plate; the bracket beam is connected with the pulp scraping plate through a chute hanging plate and a scraper connecting rod, the bracket beam is connected with the pulp storage device through the chute hanging plate and a pulp storage groove hanging rod, and the scraper connecting rod and the pulp storage groove hanging rod are connected with the same sliding inhaul cable; a funnel support frame is arranged between the grouting funnel and the bracket beam, and the lower part of the grouting funnel is connected with an inner grouting pipe; an outer grouting pipe is arranged outside the inner grouting pipe; an upper position control plate and a lower position control plate are respectively arranged at the tops of the inner grouting pipe and the outer grouting pipe, and an elastic position control body is arranged between the upper position control plate and the lower position control plate; the bottom end of the outer grouting pipe is provided with a light floating plate with the bottom surface being flush with the pipe orifice; the inner grouting pipe and the funnel support frame are connected with the same sliding inhaul cable; in the concrete pouring process, the transverse positions of the inner grouting pipe and the slurry storage device are synchronously controlled through the sliding inhaul cable, and the top surface of the concrete is strickled off through the slurry scraping plate;
5) and (3) prestressed cable bundle tensioning construction: penetrating a prestressed cable bundle in the box girder concrete through a cable bundle base plate; arranging a connecting side plate on the side wall of the box girder concrete at the lower part of the prestressed cable bundle, and firmly connecting the connecting side plate with the box girder concrete through a side plate anchor nail; a supporting plate supporting body and a jack supporting plate are sequentially arranged on the connecting side plate; arranging a first anchorage device, a piercing jack and a second anchorage device on the suspended prestressed cable bundle in sequence, and arranging fastening clamping pieces between the first anchorage device and the prestressed cable bundle and between the second anchorage device and the prestressed cable bundle respectively; after a tensioning force is applied to the prestressed cable bundle through the center-penetrating jack, the limiting baffle is arranged on the outer side of the second anchor device, a limiting screw rod is arranged between the limiting baffle and a connecting anchor bolt on the cable bundle base plate, and fastening force is applied to the limiting screw rod through a fastening bolt; and cutting off the prestressed cable bundle after the cable bundle limiting hoop plate is firmly connected with the prestressed cable bundle by adopting the fastening hoop.
Preferably, the method comprises the following steps: step 2) the cross section shape of the column bottom boot leg is matched with that of the vertical support column, a tube inner sealing body is arranged in the column bottom boot leg, and a tube side fastening bolt is arranged on the outer side wall of the column bottom boot leg; the lower surface of the column top transverse plate is provided with a plate bottom shoe plate connected with the vertical supporting column, and the upper surface of the column top transverse plate is provided with a plate top shoe plate connected with the supporting cross beam; the beam side guardrail is arranged on the outer side of the transverse Bailey beam, and the beam side guardrail is vertically welded with the guardrail lower bearing plate.
Preferably, the method comprises the following steps: step 3) the adjustable inner support consists of a support rod connector, an inner support cross rod and an inner support diagonal rod, and support rod rotating hinges are arranged at the joints of the support rod connector, the inner support cross rod and the inner support diagonal rod; the inner support cross rod and the inner support diagonal rod are both composed of a screw rod and a nut, and the length of the screw rod and the length of the nut are adjustable; the splicing clamp consists of a clamp transverse plate, clamp side plates and clamping bolts; the clamping bolts are arranged in 1-2 rows along the height direction of the clamp side plate, and the clamping bolts are perpendicularly welded with the clamp side plate.
Preferably, the method comprises the following steps: step 4), the bracket beam is formed by rolling a steel plate, and an in-beam sliding groove is formed in the bracket beam; the pulp storage device consists of a pulp storage tank, a pulp inlet hole and a pulp receiving plate, wherein the pulp inlet hole is formed in one side of the pulp storage tank, and a pulp supplementing hole is formed in a bottom plate of the pulp storage tank; the bottom surface of the pulp receiving plate is flush with the bottom end of the pulp scraping plate, and a flexible connecting plate is arranged between the pulp scraping plate connecting rod and the pulp storage device.
Preferably, the method comprises the following steps: step 5) the jack support plate is formed by rolling a steel plate, the inner diameter of the jack support plate is the same as the outer diameter of the penetrating jack, the cross section of the jack support plate is arc-shaped, and the central angle corresponding to the arc is 30-60 degrees; the limiting baffle is formed by rolling a steel plate and is vertically welded and connected with the cable bundle limiting hoop plate; the diameter of the cable bundle limiting hoop plate is 5-10 mm larger than that of the prestressed cable bundle, the cross section of the cable bundle limiting hoop plate is arc-shaped, and the central angle corresponding to the arc is 30-60 degrees.
The invention has the beneficial effects that:
(1) the construction support is convenient to install on site and good in integrity, and effectively reduces the on-site construction time of a concrete foundation and the difficulty in installing and positioning the transverse Bailey beam; meanwhile, the beam side guardrail and the transverse Bailey beam are convenient to install and connect, and the installation cost of the guardrail can be saved.
(2) The steel box is high in mounting and positioning accuracy and easy to move, and fastening force can be applied to the steel box through the beam top clamping plate, so that the difficulty of welding construction is reduced; meanwhile, the adjustable inner support is arranged in the steel box, so that the integrity of the steel box can be improved, and the utilization rate of materials can be improved.
(3) The concrete pouring device is convenient to arrange and easy to control the position; meanwhile, the invention can synchronously complete the procedures of concrete pouring, residual slurry collection, local slurry supplement, surface strickling and the like, and can effectively improve the efficiency of concrete pouring construction.
(4) The prestressed cable bundle tensioning construction structure has good integrity, and can transversely restrict the deformation of the anchorage device and the clamping piece through the limiting baffle plate, thereby not only reducing the loss of the prestressed cable bundle during the cutting, but also improving the safety of the prestressed cable bundle cutting construction.
Drawings
FIG. 1 is a flow chart of the construction of the steel box-concrete composite beam of the present invention;
FIG. 2 is a schematic view of a construction scaffold layout;
FIG. 3 is a schematic diagram of a steel box splicing construction structure;
FIG. 4 is a schematic view of the adjustable inner support structure shown in FIG. 3;
fig. 5 is a schematic view of the connection structure of the beret beam connector and the transverse beret beam in fig. 3;
FIG. 6 is a schematic view of the splicing fixture of FIG. 3;
FIG. 7 is a schematic view of a concrete pouring construction;
FIG. 8 is a cross-sectional schematic view of the bracket beam of FIG. 7;
FIG. 9 is a schematic view of the structure of the slurry storage device in FIG. 7;
FIG. 10 is a schematic diagram of a prestressed cable bundle tensioning construction structure.
Description of reference numerals: 1-prefabricating a foundation; 2-a foundation soil layer; 3-connecting convex falcon; 4-connecting tongue-and-groove; 5-column bottom bootleg; 6-connecting a cap plate; 7-basic tie bars; 8-vertical bracing columns; 9-column side support plates; 10-the support columns are transversely connected; 11-column top transverse plate; 12-a support beam; 13-transverse beret beam; 14-beam top wale; 15-beam side guard rail; 16-guardrail fastening bolts; 17-guardrail lower bearing plate; 18-a guardrail upper bearing plate; 19-end box beams; 20-middle box girder; 21-adjustable inner support; a 22-bailey beam connection; 23-leveling cushion blocks; 24-end sprags; 25-diagonal bracing connecting plates; 26-beam top clamp plate; 27-lateral retainers; 28-vertical alignment; 29-splicing fixture; 30-a support supporting plate; 31-a bracket runner; 32-a rack backplane; 33-a support slide; 34-a vertical anchor rod; 35-bottom anchor plate; 36-a stent strut; 37-a bracket beam; 38-a scraping board; 39-chute hanging plates; 40-a flight link; 41-a pulp storage device; 42-slurry storage tank hanging rod; 43-a sliding cable; 44-a grouting funnel; 45-funnel support; 46-inner grouting pipe; 47-external grouting pipe; 48-an upper position control plate; 49-lower position control plate; 50-elastic control body; 51-light floating plate; 52-prestressed cable bundles; 53-rope tie plate; 54-connecting the side plates; 55-side plate anchor; 56-box girder concrete; 57-a strut support; 58-jack support plate; 59-a first anchorage; 60-a center-penetrating jack; 61-a second anchor; 62-fastening the clip; 63-a limit baffle; 64-connecting anchor bolts; 65-a limit screw; 66-fastening bolts; 67-a fastening cuff; 68-cable bundle limiting hoop plate; 69-an in-can obturator; 70-cylinder side fastening bolt; 71-a sole shoe plate; 72-board top shoe board; 73-strut connectors; 74-inner bracing cross bar; 75-inner brace diagonal; 76-brace bar rotation hinge; 77-beam bottom clamping plate; 78-splint connecting bolt; 79-clamp transverse plate; 80-clamp side plates; 81-clamping bolt; 82-in-beam chute; 83-a stock chest; 84-slurry inlet holes; 85-slurry receiving plate; 86-a flexible web; 87-slurry supplementing holes; 88-box girder vertical plates; 89-a cap bottom leveling layer; 90-vertical bracing plate.
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 steel box-concrete composite beam hoisting system includes the following construction steps:
1) construction preparation: determining the spatial position of the steel box-concrete combined beam through field surveying and mapping, preparing construction devices and materials required by construction, and carrying out field assembly on each construction member;
2) laying a construction support: placing a prefabricated foundation 1 on the upper part of a foundation soil layer 2, splicing and connecting a connecting convex tenon 3 and a connecting rabbet 4 on the prefabricated foundation 1, then placing a connecting cap plate 6 which is firmly connected with a column bottom boot leg 5 on the upper part of the prefabricated foundation 1, arranging a cap bottom leveling layer 89 between the prefabricated foundation 1 and the connecting cap plate 6, then firmly connecting the connecting cap plate 6 with the prefabricated foundation 1 through a foundation tie bar 7, and then applying fastening force to the prefabricated foundation 1; column side supporting plates 9 are arranged at the height of the vertical supporting columns from 1/3-1/4 of the top of each vertical supporting column 8, and supporting column cross connections 10 are arranged between the corresponding column side supporting plates 9; a column top transverse plate 11, a supporting cross beam 12 and a transverse Bailey beam 13 are sequentially arranged at the top of the vertical support column 8, and a beam top cross brace 14 is arranged at the joint of the supporting cross beam 12 and the transverse Bailey beam 13; a beam side guardrail 15 is arranged at the outer end part of the transverse Bailey beam 13, and a guardrail lower bearing plate 17, a guardrail upper bearing plate 18 and the transverse Bailey beam 13 are connected into a whole through a guardrail fastening bolt 16;
3) splicing construction of the steel box: adjustable inner supports 21 are arranged in the end box girders 19 and the middle box girder 20; a Bailey beam connecting body 22 is arranged on the transverse Bailey beam 13; a leveling cushion block 23 is arranged between the bottom of the end box girder 19 and the transverse Bailey girder 13, an end inclined strut 24 and an inclined strut connecting plate 25 are arranged between the outer side of the end box girder 19 and the Bailey girder connecting body 22, and the end inclined strut 24 is welded with a girder top clamping plate 26; firstly, arranging a vertical aligning body 28 and a horizontal aligning body 27 on the horizontal Bailey beam 13, and then arranging a vertical supporting plate 90 between the horizontal aligning body 27 and the Bailey beam connecting body 22; after the horizontal position and the vertical position of the middle box girder 20 are corrected by the horizontal correcting body 27 and the vertical correcting body 28 synchronously, the vertical correcting body 28 is replaced by the leveling cushion block 23; a splicing clamp 29 is arranged at the upper part of a box girder upright plate 88 which is connected with the end box girder 19 and the middle box girder 20;
4) and (3) concrete pouring construction: laying support supporting plates 30 between the adjacent transverse Bailey beams 13, and firmly connecting the support supporting plates 30 with the support sliding grooves 31; a bracket slide rail 33 is arranged between the bracket bottom plate 32 and the bracket slide groove 31, a vertical anchoring rod 34 and a bottom anchoring plate 35 are arranged between the bracket bottom plate 32 and the transverse Bailey beam 13, and a bracket supporting column 36 and a bracket cross beam 37 are sequentially arranged at the upper part of the bracket bottom plate 32; the bracket beam 37 is connected with the pulp scraping plate 38 through a chute hanging plate 39 and a scraper connecting rod 40, the bracket beam 37 is connected with the pulp storage device 41 through the chute hanging plate 39 and a pulp storage tank hanging rod 42, and the scraper connecting rod 40 and the pulp storage tank hanging rod 42 are connected with the same sliding inhaul cable 43; a funnel support frame 45 is arranged between the grouting funnel 44 and the bracket beam 37, and the lower part of the grouting funnel 44 is connected with an inner grouting pipe 46; an outer grouting pipe 47 is arranged outside the inner grouting pipe 46; an upper control plate 48 and a lower control plate 49 are respectively arranged at the tops of the inner grouting pipe 46 and the outer grouting pipe 47, and an elastic control body 50 is arranged between the upper control plate 48 and the lower control plate 49; a light floating plate 51 with the bottom surface flush with the pipe orifice is arranged at the bottom end of the outer grouting pipe 47; the inner grouting pipe 46 and the funnel support frame 45 are connected with the same sliding inhaul cable 43; in the concrete pouring process, the transverse positions of the inner grouting pipe 46 and the grout storage device 41 are synchronously controlled through the sliding inhaul cable 43, and the top surface of the concrete is scraped through the grout scraping plate 38;
5) tensioning construction of the prestressed cable bundles 52: the prestressed cable bundles 52 in the box girder concrete 56 penetrate through the cable bundle backing plates 53; a connecting side plate 54 is arranged on the side wall of box girder concrete 56 at the lower part of the prestressed cable bundle 52, and the connecting side plate 54 is firmly connected with the box girder concrete 56 through a side plate anchor 55; a supporting plate supporting body 57 and a jack supporting plate 58 are sequentially arranged on the connecting side plate 54; a first anchorage device 59, a penetrating jack 60 and a second anchorage device 61 are sequentially arranged on the suspended prestressed cable bundle 52, and fastening clamping pieces 62 are respectively arranged between the first anchorage device 59 and the prestressed cable bundle 52 and between the second anchorage device 61 and the prestressed cable bundle 52; after the tension force is applied to the prestressed cable bundle 52 through the center-penetrating jack 60, the limiting baffle 63 is arranged on the outer side of the second anchorage device 61, a limiting screw 65 is arranged between the limiting baffle 63 and the connecting anchor bolt 64 on the cable bundle base plate 53, and fastening force is applied to the limiting screw 65 through a fastening bolt 66; after the cable harness stopper 68 is firmly connected to the prestressed cable harness 52 by the fastening ferrule 67, the prestressed cable harness 52 is cut off.
Referring to fig. 2-10, in the steel box-concrete combined beam hoisting system, a connection cap plate 6 is arranged on a prefabricated foundation 1; a column top transverse plate 11, a supporting cross beam 12 and a transverse Bailey beam 13 are sequentially arranged at the top of the vertical support column 8; adjustable inner supports 21 are arranged in the end box girders 19 and the middle box girder 20; correcting the transverse position and the vertical position of the middle box girder 20 by adopting a transverse correcting body 27 and a vertical correcting body 28; a splicing clamp 29 is arranged at the upper part of a box girder upright plate 88 which is connected with the end box girder 19 and the middle box girder 20; the transverse positions of the inner grouting pipe 46 and the grout storage device 41 are controlled through the sliding inhaul cable 43, and the top surface of the concrete is strickled off through the grout scraping plate 38; a supporting plate supporting body 57 and a jack supporting plate 58 are sequentially arranged on the connecting side plate 54; a limit screw 65 is provided between the limit baffle 63 and the connecting anchor 64 on the cable tie plate 53.
The prefabricated foundation 1 is of a reinforced concrete structure, the strength grade of concrete is C55, the height is 50cm, and the width is 100 cm; the height of the convex part of the connecting convex falcon 3 is 10 cm; the connecting tongue and groove 4 corresponds to the connecting convex falcon 3.
The foundation soil layer 2 is cohesive soil in a hard plastic state.
The cross section of the column bottom boot leg 5 is similar to that of the vertical support column 8, and is formed by rolling a steel plate with the thickness of 10 mm. The vertical support column 8 is made of a steel pipe with the diameter of 400mm and the wall thickness of 2 mm.
The connecting cap plate 6 is formed by rolling a steel plate with the thickness of 2 mm.
The foundation tie bars 7 are threaded reinforcing steel bars with the diameter of 20 mm.
The column side supporting plate 9 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the column side supporting plate is arc-shaped, and the inner diameter of the column side supporting plate is 400 mm.
The brace cross-linkage 10 adopts a screw rod with the diameter of 30 mm.
The column top transverse plate 11 is made of a steel plate with the thickness of 2 cm.
The supporting beam 12 is made of H-shaped steel with the specification of 250 multiplied by 9 multiplied by 14 by rolling.
The truss section of the transverse Bailey beam 13 is made of 16 type manganese steel, the pin is made of chrome manganese titanium steel, and the bolt is made of spring steel.
The beam top cross brace 14 is formed by cutting a steel plate with the thickness of 1cm and is vertically welded and connected with the supporting cross beam 12.
The beam side guard rail 15 is made of a steel pipe having a diameter of 50mm and has a height of 100 cm.
The guardrail fastening bolt 16 is made of a screw rod with the diameter of 22 mm.
The guardrail lower bearing plate 17 and the guardrail upper bearing plate 18 are both made of steel plates with the thickness of 10 mm.
The end box girders 19, the middle box girder 20 and the box girder upright plates 88 are all rolled by steel plates with the thickness of 1 cm.
The adjustable inner support 21 is composed of a support rod connector 73, an inner support cross rod 74 and an inner support diagonal rod 75. The stay bar connector 73 is made of a steel plate having a thickness of 1cm, and has a width of 20cm, a length of 50cm, and a height of 20 cm. The inner support cross rod 74 and the inner support diagonal rod 75 are both composed of a screw rod and a nut, and the diameter of the screw rod is 30 mm.
The bailey beam connection body 22 is composed of a beam top clamping plate 26, a beam bottom clamping plate 77, and a clamping plate connection bolt 78. The beam top clamping plate 26 and the beam bottom clamping plate 77 are both made of steel plates with the thickness of 1 cm. The clamp plate connecting bolt 78 is a stainless steel bolt having a diameter of 30 mm.
The leveling cushion block 23 is made of a profile steel cushion block.
The end inclined strut 24 is formed by combining a screw rod with the diameter of 60mm and a bolt.
The inclined strut connecting plate 25 is formed by rolling a steel plate with the thickness of 1 cm.
The vertical aligning body 28 adopts a hydraulic jack with the jacking force of 30 tons; the transverse aligning body 27 is composed of a screw rod and a bolt with the diameter of 60 mm.
The splicing jig 29 is composed of a jig transverse plate 79, jig side plates 80, and a clamping bolt 81. The clamp transverse plate 79 and the clamp side plate 80 are both formed by rolling steel plates with the thickness of 1 cm. The clamping bolt 81 is formed by combining a screw rod with a diameter of 22mm and a bolt.
The support supporting plate 30 and the support bottom plate 32 are respectively formed by cutting steel plates with the thicknesses of 2mm and 10 mm.
The bracket sliding groove 31 is formed by rolling a steel plate with the thickness of 2mm, and the groove width is 2 cm.
The support slide rail 33 is formed by combining steel bars and steel wheels.
The vertical anchor rods 34 are made of screws with a diameter of 16 mm.
The bottom anchor plate 35 is a steel plate with a thickness of 2 mm.
The support brace 36 is made of a steel tube with a diameter of 100mm and a wall thickness of 2 mm.
The bracket beam 37 is formed by rolling a steel plate with the thickness of 1 cm. The width of the in-beam chute 82 is 10cm and the height is 2 cm.
The scraping plate 38 is a steel plate with the thickness of 2 mm; the chute hanging plate 39 is formed by rolling a steel plate with the thickness of 1 cm.
The blade link 40 is made of a rubber plate having a thickness of 2 mm.
The pulp storage device 41 consists of a pulp storage tank 83, a pulp inlet hole 84 and a pulp receiving plate 85.
The slurry storage tank hanging rod 42 is made of a steel pipe with the diameter of 50 mm. The slurry storage tank 83 is formed by welding alloy plates with the thickness of 2mm and the volume of 0.1m3. The height and width of the slurry inlet 84 are both 100 mm.
The slurry receiving plate 85 is a rubber plate having a thickness of 2 mm.
The sliding cable 43 is a steel wire rope with the diameter of 10 mm.
The grouting funnel 44 is formed by rolling a steel plate with the thickness of 1mm, and the cross section of the grouting funnel is funnel-shaped.
The funnel bracket 45 is rolled by a steel pipe with the diameter of 60 mm.
The inner and outer grouting pipes 46 and 47 are made of steel pipes having diameters of 150mm and 180mm, respectively.
The upper position control plate 48 and the lower position control plate 49 are both made of steel plates with the thickness of 2 mm.
The elastic control body 50 is made of a spring material with a diameter of 10 mm.
The lightweight floating plate 51 is a foam plate having a thickness of 1 cm.
The prestressed cable 52 is a steel strand with a diameter of 15.24 mm.
The cable tie plate 53 is a steel plate having a thickness of 2 cm.
The connecting side plate 54 is made of a steel plate having a thickness of 10 mm.
The side plate anchor 55 is an expansion bolt with a diameter of 20 mm.
The box girder concrete 56 is commercial concrete having a strength grade of C55.
The supporting plate supporting body 57 is made of a steel pipe with the diameter of 60 mm.
The jack supporting plate 58 is formed by rolling a steel plate, the inner diameter of the jack supporting plate is the same as the outer diameter of the center-penetrating jack 60, the central angle of the jack supporting plate is 60 degrees, and the jack supporting plate is formed by cutting the steel plate with the thickness of 2 mm.
The first anchorage device 59 and the second anchorage device 61 both adopt 9-hole prestressed anchor bars, and the fastening clamping piece 62 adopts 3-piece type clamping pieces and is matched with the first anchorage device 59 and the second anchorage device 61 for use.
The penetrating jack 60 adopts a 100t hydraulic penetrating jack.
The limiting baffle 63 is formed by rolling a steel plate with the thickness of 1 cm.
The connecting anchor 64 and the fastening bolt 66 are each a stainless steel bolt having an inner diameter of 30 mm.
The limiting screw 65 is a galvanized screw with the diameter of 30 mm.
The fastening cuff 67 is a throat cuff having a width of 2 cm.
The cable harness limiting hoop plate 68 is formed by rolling a steel plate with the thickness of 0.5mm, the cross section of the cable harness limiting hoop plate is arc-shaped, the diameter of the cable harness limiting hoop plate is 10mm larger than that of the prestressed cable harness 52, and the central angle of the cable harness limiting hoop plate is 60 degrees.
The inner cylindrical sealing body 69 is a rubber sheet having a thickness of 2 mm.
The cylinder side fastening bolt 70 is a stainless steel bolt having a diameter of 22 mm.
Both the bottom shoe plate 71 and the top shoe plate 72 are made of steel plates having a thickness of 2 mm. The strut pivot hinge 76 is a 30mm diameter directional pivot hinge.
The beam bottom clamping plate 77 is formed by rolling a steel plate with the thickness of 2 mm.
The flexible connecting plate 86 is a rubber plate with a thickness of 2 mm.
The diameter of the grout filling hole 87 is 10 cm.
The cap bottom leveling layer 89 adopts medium coarse sand with the thickness of 1 cm.
The vertical supporting plate 90 is formed by rolling a steel plate with the thickness of 10 mm.
Claims (5)
1. The construction method of the steel box-concrete combined beam hoisting system is characterized by comprising the following construction steps:
1) construction preparation: determining the spatial position of the steel box-concrete combined beam through field surveying and mapping, preparing construction devices and materials required by construction, and carrying out field assembly on each construction member;
2) laying a construction support: placing a prefabricated foundation (1) on the upper part of a foundation soil layer (2), splicing and connecting a connecting convex tenon (3) and a connecting groove and tongue (4) on the prefabricated foundation (1), then placing a connecting cap plate (6) which is firmly connected with a column bottom boot leg (5) on the upper part of the prefabricated foundation (1), arranging a cap bottom leveling layer (89) between the prefabricated foundation (1) and the connecting cap plate (6), then firmly connecting the connecting cap plate (6) with the prefabricated foundation (1) through a foundation tie bar (7), and then applying a fastening force to the prefabricated foundation (1); the column bottom boot leg (5) is connected with a vertical support column (8), and the column bottom boot leg (5) is positioned above the connecting cap plate (6); column side supporting plates (9) are arranged at the height 1/3-1/4 of the vertical supporting column from the top of the vertical supporting column (8), and supporting column cross connections (10) are arranged between the opposite column side supporting plates (9); a column top transverse plate (11), a supporting cross beam (12) and a transverse Bailey beam (13) are sequentially arranged at the top of the vertical support column (8), and a beam top transverse support (14) is arranged at the joint of the supporting cross beam (12) and the transverse Bailey beam (13); a beam side guardrail (15) is arranged at the outer end part of the transverse Bailey beam (13), and a guardrail lower bearing plate (17), a guardrail upper bearing plate (18) and the transverse Bailey beam (13) are connected into a whole through a guardrail fastening bolt (16);
3) splicing construction of the steel box: adjustable inner supports (21) are arranged in the end box girder (19) and the middle box girder (20); a Bailey beam connecting body (22) is arranged on the transverse Bailey beam (13); the Bailey beam connecting body (22) consists of a beam top clamping plate (26), a beam bottom clamping plate (77) and a clamping plate connecting bolt (78), the beam top clamping plate (26) and the beam bottom clamping plate (77) are respectively positioned on the upper surface and the lower surface of the transverse Bailey beam (13), and the beam top clamping plate (26) and the beam bottom clamping plate (77) are fixedly connected with the transverse Bailey beam (13) through the clamping plate connecting bolt (78); a leveling cushion block (23) is arranged between the bottom of the end box girder (19) and the transverse Bailey girder (13), an end inclined strut (24) and an inclined strut connecting plate (25) are arranged between the outer side of the end box girder (19) and the Bailey girder connecting body (22), and the end inclined strut (24) is connected with a girder top clamping plate (26) in a welding way; firstly, arranging a vertical aligning body (28) on a transverse Bailey beam (13), wherein the vertical aligning body (28) is positioned between the bottom of a middle box beam (20) and the transverse Bailey beam (13), the outer side of the middle box beam (20) is provided with the transverse aligning body (27), the vertical aligning body (28) adopts a hydraulic jack, the transverse aligning body (27) consists of a screw and a bolt, and then a vertical supporting plate (90) is arranged between the transverse aligning body (27) and a Bailey beam connecting body (22); after the horizontal position and the vertical position of the middle box girder (20) are corrected by a horizontal correcting body (27) and a vertical correcting body (28) synchronously, the vertical correcting body (28) is replaced by a leveling cushion block (23); a splicing clamp (29) is arranged at the upper part of a box girder vertical plate (88) connected with the end box girder (19) and the middle box girder (20);
4) and (3) concrete pouring construction: laying support supporting plates (30) between adjacent transverse Bailey beams (13), and firmly connecting the support supporting plates (30) with support sliding grooves (31), wherein the support sliding grooves (31) are arranged on the upper surfaces of the support supporting plates (30); the support bottom plate (32) is positioned above the support sliding grooves (31), the support sliding rails (33) are arranged between the support bottom plate (32) and the support sliding grooves (31), the vertical anchoring rods (34) and the bottom anchoring plates (35) are arranged between the support bottom plate (32) and the transverse Bailey beam (13), and the support supporting columns (36) and the support cross beams (37) are sequentially arranged at the upper part of the support bottom plate (32); the bracket beam (37) is connected with the pulp scraping plate (38) through a chute hanging plate (39) and a scraper connecting rod (40), the bracket beam (37) is connected with the pulp storage device (41) through the chute hanging plate (39) and a pulp storage tank hanging rod (42), and the scraper connecting rod (40) and the pulp storage tank hanging rod (42) are connected with the same sliding inhaul cable (43); a funnel support frame (45) is arranged between the grouting funnel (44) and the bracket cross beam (37), and the lower part of the grouting funnel (44) is connected with an inner grouting pipe (46); an outer grouting pipe (47) is arranged outside the inner grouting pipe (46); an upper position control plate (48) and a lower position control plate (49) are respectively arranged at the tops of the inner grouting pipe (46) and the outer grouting pipe (47), and an elastic position control body (50) is arranged between the upper position control plate (48) and the lower position control plate (49); a light floating plate (51) with the bottom surface flush with the pipe orifice is arranged at the bottom end of the outer grouting pipe (47); the inner grouting pipe (46) and the funnel support frame (45) are connected with the same sliding inhaul cable (43); in the concrete pouring process, the transverse positions of the inner grouting pipe (46) and the slurry storage device (41) are synchronously controlled through the sliding inhaul cable (43), and the top surface of the concrete is strickled off through the slurry scraping plate (38);
5) tensioning construction of a prestressed cable bundle (52): the prestressed cable harness (52) in the box girder concrete (56) penetrates through a cable harness base plate (53); a connecting side plate (54) is arranged on the side wall of the box girder concrete (56) at the lower part of the prestressed cable bundle (52), and the connecting side plate (54) is firmly connected with the box girder concrete (56) through a side plate anchor bolt (55); a supporting plate supporting body (57) and a jack supporting plate (58) are sequentially arranged on the connecting side plate (54); a first anchorage device (59), a through jack (60) and a second anchorage device (61) are sequentially arranged on the suspended prestressed cable bundle (52), and fastening clamping pieces (62) are respectively arranged between the first anchorage device (59) and the prestressed cable bundle (52) and between the second anchorage device (61) and the prestressed cable bundle (52); after a tension force is applied to the prestressed cable bundle (52) through the center-penetrating jack (60), the limiting baffle (63) is arranged on the outer side of the second anchorage device (61), a limiting screw rod (65) is arranged between the limiting baffle (63) and a connecting anchor bolt (64) on the cable bundle base plate (53), and a fastening force is applied to the limiting screw rod (65) through a fastening bolt (66); after the cable harness limiting hoop plate (68) is firmly connected with the prestressed cable harness (52) by using the fastening hoop (67), the prestressed cable harness (52) is cut off.
2. The construction method of the steel box-concrete composite beam hoisting system according to claim 1, characterized in that: step 2), the cross section shape of the column bottom boot leg (5) is matched with that of a vertical support column (8), a leg inner sealing body (69) is arranged inside the column bottom boot leg (5), and a leg side fastening bolt (70) is arranged on the outer side wall of the column bottom boot leg (5); the lower surface of the column top transverse plate (11) is provided with a plate bottom shoe plate (71) connected with the vertical supporting column (8), and the upper surface of the column top transverse plate (11) is provided with a plate top shoe plate (72) connected with the supporting cross beam (12); the beam side guardrail (15) is arranged on the outer side of the transverse Bailey beam (13), and the beam side guardrail (15) is vertically welded and connected with the guardrail lower bearing plate (17).
3. The construction method of the steel box-concrete composite beam hoisting system according to claim 1, characterized in that: step 3), the adjustable inner support (21) consists of a support rod connecting body (73), an inner support cross rod (74) and an inner support diagonal rod (75), and support rod rotating hinges (76) are arranged at the joints of the support rod connecting body (73), the inner support cross rod (74) and the inner support diagonal rod (75); the inner support cross rod (74) and the inner support inclined rod (75) are both composed of a screw rod and a nut, and the length of the screw rod and the nut can be adjusted; the splicing clamp (29) consists of a clamp transverse plate (79), a clamp side plate (80) and a clamping bolt (81); the clamping bolts (81) are arranged in 1-2 rows along the height direction of the clamp side plate (80), and the clamping bolts (81) are vertically welded with the clamp side plate (80).
4. The construction method of the steel box-concrete composite beam hoisting system according to claim 1, characterized in that: step 4), the bracket cross beam (37) is formed by rolling a steel plate, and an in-beam sliding groove (82) is arranged in the bracket cross beam; the pulp storage device (41) consists of a pulp storage tank (83), a pulp inlet hole (84) and a pulp receiving plate (85), wherein the pulp inlet hole (84) is formed in one side of the pulp storage tank (83), and a pulp supplementing hole (87) is formed in a bottom plate of the pulp storage tank (83); the bottom surface of the pulp receiving plate (85) is flush with the bottom end of the pulp scraping plate (38), and a flexible connecting plate (86) is arranged between the pulp scraping connecting rod (40) and the pulp storage device (41).
5. The construction method of the steel box-concrete composite beam hoisting system according to claim 1, characterized in that: step 5), rolling the jack support plate (58) by using a steel plate, wherein the inner diameter of the jack support plate (58) is the same as the outer diameter of the through jack (60), and the cross section of the jack support plate (58) is arc-shaped, and the central angle corresponding to the arc is 30-60 degrees; the limiting baffle (63) is formed by rolling a steel plate and is vertically welded with the cable bundle limiting hoop plate (68); the diameter of the cable harness limiting hoop plate (68) is 5-10 mm larger than that of the prestressed cable harness (52), the cross section of the cable harness limiting hoop plate (68) is arc-shaped, and the central angle corresponding to the arc is 30-60 degrees.
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| CN111203977B (en) * | 2020-01-20 | 2021-03-26 | 四川路航建设工程有限责任公司 | Construction method of prefabricated box girder |
| CN111851309B (en) * | 2020-08-12 | 2022-07-05 | 安徽省公路桥梁工程有限公司 | Cast-in-place box girder construction method |
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| CN102220741B (en) * | 2011-04-14 | 2012-05-23 | 中铁二十局集团第六工程有限公司 | Steel-concrete composite girder construction technology striding current lines and being parallel to existing lines |
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