CN100494576C - Method for setting up box-type bridge body maintain engineering box outer hanging falsework - Google Patents
Method for setting up box-type bridge body maintain engineering box outer hanging falsework Download PDFInfo
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- CN100494576C CN100494576C CNB2007100528421A CN200710052842A CN100494576C CN 100494576 C CN100494576 C CN 100494576C CN B2007100528421 A CNB2007100528421 A CN B2007100528421A CN 200710052842 A CN200710052842 A CN 200710052842A CN 100494576 C CN100494576 C CN 100494576C
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Abstract
The invention relates to a construction method of external scaffold in box-type bridge maintenance engineering, particularly a construction method of externally-suspended scaffold in maintenance engineering of box-type bridge girder. The invention is characterized in that the method comprises the following steps: 1) building a full hall scaffold, as a hoisting rooting platform, on a pier repair platform of the original bridge or in a smaller space near the pier, and building a first row of in-box horizontal steel tubes (8), vertical leaf steel cables (9), vertical right steel cables (10), low boom columns (13), left vertical steel tubes (12) and right vertical steel tubes (14) on the hoisting rooting platform; 2) cantilevering second and third rows by the same method as the first tow until the maintenance section is covered completely; 3) building trusses; 7) paving gang boards on a truss top chord (15), a left web maintenance platform (22) and a right web maintenance platform (23) respectively, and suspending a safety net. The invention has the advantages of no limitation of space under bridge and short construction cycle.
Description
Technical field
The present invention relates to a kind of erection method of chamber type bridge maintaining engineering case external scaffolding.
Background technology
Scaffold is a temporory structure indispensable in the building operations, and it is set up with engineering progress, and engineering finishes and promptly removes.Though scaffold is a temporory structure, when operations such as basis, main body construction and the finishing of engineering, equipment installation, all be unable to do without scaffold.Usually adopt in the construction that scaffold solves personnel's job platform, interim material is deposited and short-range transport channel problem.So whether the scaffold design and construction is reasonable, not only directly affect the construction speed and the construction cost of construction work, also direct relation operating personnel's operating condition and life security simultaneously.
Newly-built bridge and bridge strengthening maintenance all need be set up certain operation platform.Conventional newly-built bridge construction mainly adopts full framing cast-in-place and hang the form that blue cantilever combines.Conventional scaffold mainly lands frame, slip scaffold based on full hall, and employed material is materials such as steel pipe, shaped steel.The advantage of conventional scaffold construction is: structure stress is clear and definite, safety, reliable; Shortcoming is: be subjected to that place restriction is big, deadweight is big, material usage is many, expense is big, long construction period etc.
The bridge strengthening maintenance is because of relating to space under the bridge, structure factors such as (river course, railways), and the job site does not possess the condition of setting up full hall scaffold and slip scaffold, and existing scaffold job practices is difficult to implement.
Summary of the invention
The object of the present invention is to provide a kind of erection method that is not subjected to the outer boat scaffold of box-type bridge beam body maintenance works case of place restriction, short construction period under the bridge.
To achieve these goals, technical scheme of the present invention is: the erection method of the outer boat scaffold of box-type bridge beam body maintenance works case is characterized in that it comprises the steps:
1) utilize a bridge pier inspection platform of former bridge or utilize less place, bridge pier place set up full hall scaffold as suspension bracket the construction platform of taking root, with this suspension bracket construction platform of taking root is support, sets up horizontal steel tube 8, vertical left wire rope 9, vertical right wire rope 10, truss lower chord 13, left pole steel tube 12, right pole steel tube 14 in first row's the case:
At first along box-type bridge laterally at the left part of the case beam base plate 5 of box-type bridge beam body, right part is opened the left hole 6 of first row, right hole 4, can omit perforate as case beam base plate 5 existing suitable holes, horizontal steel tube 8 in first case of arranging is laterally placed on the edge in case beam inner chamber 2, first row's vertical left wire rope 9 passes cover and hangs in the case on the horizontal steel tube 8 from first row's left hole 6, the two ends of vertical left wire rope 9 constitutes left steel wire loop by rope clamp is fixedly connected, first row's vertical right wire rope 10 passes cover and hangs in the case on the horizontal steel tube 8 from first row's right hole 4, the two ends of vertical right wire rope 10 constitutes right steel wire loop by rope clamp 11 is fixedly connected;
First row's truss lower chord 13 is passed first row's left steel wire loop, right steel wire loop; The upper end of left side pole steel tube 12 is passed left hole 6 and is fixedlyed connected with horizontal steel tube 8 in the case that first arranges by fastener, fixedlyed connected with truss lower chord 13 by fastener in the bottom of left side pole steel tube 12, the upper end of right pole steel tube 14 is passed right hole 4 and is fixedlyed connected with horizontal steel tube 8 in first case of arranging by fastener, is fixedlyed connected with truss lower chord 13 by fastener in the bottom of right pole steel tube 14;
2) by the method for horizontal steel tube 8, vertical left wire rope 9, vertical right wire rope 10, truss lower chord 13, left pole steel tube 12, right pole steel tube 14 in the case of setting up first row, along box-type bridge vertically horizontal steel tube, vertical left wire rope, vertical right wire rope, truss lower chord, left pole steel tube, right pole steel tube in case beam base plate 5 is set up second row's case; Progressively set up second row, the 3rd row to another adjacent bridge pier direction cantilever ..., until till needing the maintenance works section intact;
3) fixedlyed connected by the vertical lower link of truss between first row's truss lower chord 13 and second row's the truss lower chord, fixedlyed connected by the vertical lower link of truss between second row's truss lower chord and the truss lower chord that the 3rd arranges, the rest may be inferred;
Pricncipal rafter 15 is set up in the top of truss lower chord, and pricncipal rafter and left pole steel tube 12, right pole steel tube 14 are fixedlyed connected by fastener; Vertically go up connecting rod by truss between first pricncipal rafter of arranging and the second row's pricncipal rafter and fixedly connected, vertically go up connecting rod by truss between second row's pricncipal rafter and the 3rd row's pricncipal rafter and fixedly connected, the rest may be inferred; Fixedly connected by vertical bar of truss, truss brace respectively between pricncipal rafter and the truss lower chord; Truss lower chord, pricncipal rafter, vertical bar of truss, truss brace, the vertical lower link of truss, truss are vertically gone up connecting rod and are constituted truss;
4) stretching out left web wire rope 16 from the left web gravity vent 18 of the case beam of box-type bridge beam body left side web 7, fixedlys connected with truss lower chord 13 in the lower end of left web wire rope 16, and the upper end of left web wire rope 16 is positioned at case beam inner chamber 2, is fixed by steel pipe; Stretching out right web wire rope 17 from the right web gravity vent 19 of the right web 3 of the case beam of box-type bridge beam body, fixedlys connected with truss lower chord 13 in the lower end of right web wire rope 17, and the upper end of right web wire rope 17 is positioned at case beam inner chamber, is fixed by steel pipe;
5) stretching out oblique left wire rope 20 from the left hole 6 of case beam base plate 5, fixedlys connected with truss lower chord 13 in the lower end of oblique left wire rope 20, and the upper end of oblique left wire rope 20 is positioned at case beam inner chamber 2, fixing by horizontal steel tube in the case 8; Stretching out oblique right wire rope 21 from the right hole 4 of case beam base plate 5, fixedlys connected with truss lower chord 13 in the lower end of oblique right wire rope 21, and the upper end of oblique right wire rope 21 is positioned at case beam inner chamber 2, fixing by horizontal steel tube in the case 8;
6) left web maintenance platform 22 is established in the left side of case beam left side web 7, the bottom of left side web maintenance platform 22 is by fastener and pricncipal rafter 15, truss lower chord 13 is fixedly connected, the middle part of left side web maintenance platform 22 is fixedly connected with a left end of fixedlying connected steel pipe 24 by fastener, the other end of the fixedly connected steel pipe 24 in a left side is fixedlyed connected with left pole steel tube 12 by fastener, the top of left side web maintenance platform 22 is fixedly connected by fastener is connected steel pipe 26 with left web a end, and the other end of left web connection steel pipe 26 passes left web gravity vent 18 and fixed by fastener and the steel pipe that is positioned at case beam inner chamber 2; Right web maintenance platform 23 is established on the right side of the right web 3 of case beam, the bottom of right web maintenance platform 23 is by fastener and pricncipal rafter 15, truss lower chord 13 is fixedly connected, the middle part of right web maintenance platform 23 is fixedly connected with a right end of fixedlying connected steel pipe 25 by fastener, the other end of right fixedly connected steel pipe 25 is fixedlyed connected with right pole steel tube 14 by fastener, the top of right web maintenance platform 23 is fixedly connected by fastener is connected steel pipe 27 with right web a end, and the other end of right web connection steel pipe 27 passes right web gravity vent 19 and fixed by fastener and the steel pipe that is positioned at case beam inner chamber 2;
7) hang close order safety net below pricncipal rafter 15, the left web maintenance platform 22 and lay springboard respectively above the right web maintenance platform 23, pricncipal rafter 15; Left side web maintenance platform 22, right web maintenance platform 23 are hung safety net.
Beneficial effect of the present invention:
1, in the bridge maintenance work progress, because of under the bridge be river course 31, railway, road and can not in shipping or traffic under the bridge cut-off, and can not provide full reliably hall scaffold to take root a little under the bridge, or because of beam body maintenance activity point apart from the higher scaffold cost of saving in ground, adopt the present invention to can be used as the operation platform of the outer maintenance and reinforcement of box beam bridge case.
Not limited by the place, in existing traffic under the bridge cut-off, range of application is wider.
2), form of structure is safe and reliable, satisfies maintenance works working load needs.
3), compare with a full hall scaffold, shape steel bracket, material usage is few, less expensive.
4), short construction period.
5), set up full hall scaffold to bridge web top, full hall scaffold is higher, it is bigger to cause wind to carry the influence of full hall frame; And boat scaffold of the present invention depends on case beam base plate, and highly less, structures under wind is better.
Description of drawings
Fig. 1 is the structural representation that the present invention sets up horizontal steel tube 8, vertical left wire rope 9, vertical right wire rope 10 in the case;
Fig. 2 is that the present invention sets up left pole steel tube 12, truss lower chord 13, right pole steel tube 14 structural representations;
Fig. 3 is the structural representation that the present invention sets up truss;
Fig. 4 is the structural representation that the present invention sets up left web wire rope 16, right web wire rope 17;
Fig. 5 is the structural representation that the present invention sets up oblique left wire rope 20, oblique right wire rope 21;
Fig. 6 is the structural representation that the present invention sets up;
Fig. 7 is the boat scaffold vertical structure schematic diagram that the present invention sets up
Among the figure: 1-case back plate, 2-case beam inner chamber, the right web of 3-case beam, the right hole of 4-, 5-case beam base plate, hole, a 6-left side, 7-case beam left side web, horizontal steel tube in the 8-case, the vertical left wire rope of 9-, the vertical right wire rope of 10-, 11-rope clamp, 12-left side pole steel tube, 13-truss lower chord, the right pole steel tube of 14-, 15-pricncipal rafter, 16-left side web wire rope, the right web wire rope of 17-, 18-left side web gravity vent, the right web gravity vent of 19-, the oblique left wire rope of 20-, the oblique right wire rope of 21-, 22-left side web maintenance platform, the right web maintenance platform of 23-, the fixedly connected steel pipe in a 24-left side, the right fixedly connected steel pipe of 25-, 26-left side web connects steel pipe, the right web of 27-connects steel pipe, 28-first row, 29-second row, the 30-box-type bridge, the 31-river course.
The specific embodiment
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, the erection method of the outer boat scaffold of box-type bridge beam body maintenance works case, it comprises the steps:
1) utilize a bridge pier of former bridge (as 13 of Wuhan bridge
#Bridge pier) inspection platform or utilize less place, bridge pier place set up full hall scaffold as suspension bracket the construction platform of taking root, and inspection platform enlarged, strengthens, to satisfy the transport of materials requirement according to on-site actual situations; With this suspension bracket construction platform of taking root is support, sets up horizontal steel tube 8, vertical left wire rope 9, vertical right wire rope 10, truss lower chord 13, left pole steel tube 12, right pole steel tube 14 in first row's the case:
At first along box-type bridge laterally at the left part of the case beam base plate 5 of box-type bridge beam body, right part is opened the left hole 6 of first row, right hole 4[such as case beam base plate 5 existing suitable holes (as cantilever casting construction time boom hole) can omit perforate], horizontal steel tube 8 in first case of arranging is laterally placed on the edge in case beam inner chamber 2, first row's vertical left wire rope 9 passes cover and hangs in the case on the horizontal steel tube 8 from first row's left hole 6, the two ends of vertical left wire rope 9 constitutes left steel wire loop by rope clamp is fixedly connected, first row's vertical right wire rope 10 passes cover and hangs in the case on the horizontal steel tube 8 from first row's right hole 4, the two ends of vertical right wire rope 10 constitutes right steel wire loop by rope clamp 11 is fixedly connected;
First row's truss lower chord 13 is passed first row's left steel wire loop, right steel wire loop; The upper end of left side pole steel tube 12 is passed left hole 6 and is fixedlyed connected with horizontal steel tube 8 in the case that first arranges by fastener, fixedlyed connected with truss lower chord 13 by fastener in the bottom of left side pole steel tube 12, the upper end of right pole steel tube 14 is passed right hole 4 and is fixedlyed connected with horizontal steel tube 8 in first case of arranging by fastener, is fixedlyed connected with truss lower chord 13 by fastener in the bottom of right pole steel tube 14;
2) by the method for horizontal steel tube 8, vertical left wire rope 9, vertical right wire rope 10, truss lower chord 13, left pole steel tube 12, right pole steel tube 14 in the case of setting up first row, along box-type bridge vertically horizontal steel tube, vertical left wire rope, vertical right wire rope, truss lower chord, left pole steel tube, right pole steel tube in case beam base plate 5 is set up second row's case; Progressively to another adjacent bridge pier (as 14
#Bridge pier) direction (bridge is vertical) cantilever is set up second row, the 3rd row ..., until till needing the maintenance works section intact;
3) fixedly connected (by clasp is achieved a fixed connection) by the vertical lower link of truss between first row's truss lower chord 13 and the truss lower chord that second arranges, fixedlyed connected (by clasp is achieved a fixed connection) by the vertical lower link of truss between second row's truss lower chord and the truss lower chord that the 3rd arranges, the rest may be inferred;
Pricncipal rafter 15 is set up in the top of truss lower chord, and pricncipal rafter and left pole steel tube 12, right pole steel tube 14 are fixedlyed connected by fastener; First row's pricncipal rafter and second is arranged between the pricncipal rafter and vertically to be gone up connecting rod by truss and fixedly connected (by clasp is achieved a fixed connection), vertically go up connecting rod by truss between second pricncipal rafter of arranging and the 3rd row's pricncipal rafter and fixedly connected (by clasp is achieved a fixed connection), the rest may be inferred; Fixedly connected (achieving a fixed connection) by vertical bar of truss, truss brace respectively between pricncipal rafter and the truss lower chord by fastener; Truss lower chord, pricncipal rafter, vertical bar of truss, truss brace, the vertical lower link of truss, truss are vertically gone up connecting rod and are constituted truss;
4) stretching out left web wire rope 16 from the left web gravity vent 18 of the case beam of box-type bridge beam body left side web 7, fixedlys connected with truss lower chord 13 in the lower end of left web wire rope 16, and the upper end of left web wire rope 16 is positioned at case beam inner chamber 2, is fixed by steel pipe; Stretching out right web wire rope 17 from the right web gravity vent 19 of the right web 3 of the case beam of box-type bridge beam body, fixedlys connected with truss lower chord 13 in the lower end of right web wire rope 17, and the upper end of right web wire rope 17 is positioned at case beam inner chamber 2, is fixed by steel pipe;
5) from the left hole 6 of case beam base plate 5, stretch out oblique left wire rope 20 (or with oblique steel pipe with truss lower chord fastener be connected in case beam base plate 5 outsides), fixedly connected with truss lower chord 13 in the lower end of oblique left wire rope 20, the upper end of oblique left wire rope 20 is positioned at case beam inner chamber 2, and is fixing by horizontal steel tube in the case 8; From the right hole 4 of case beam base plate 5, stretch out oblique right wire rope 21 (or with oblique steel pipe with truss lower chord fastener be connected in case beam base plate 5 outsides), fixedly connected with truss lower chord 13 in the lower end of oblique right wire rope 21, the upper end of oblique right wire rope 21 is positioned at case beam inner chamber 2, and is fixing by horizontal steel tube in the case 8;
6) left side of case beam left side web 7 is established left web maintenance platform 22 (left web maintenance platform 22 is by steel pipe, fastener is formed by connecting), the bottom of left side web maintenance platform 22 is by fastener and pricncipal rafter 15, truss lower chord 13 is fixedly connected, the middle part of left side web maintenance platform 22 is fixedly connected with a left end of fixedlying connected steel pipe 24 by fastener, the other end of the fixedly connected steel pipe 24 in a left side is fixedlyed connected with left pole steel tube 12 by fastener, the top of left side web maintenance platform 22 is fixedly connected by fastener is connected steel pipe 26 with left web a end, and the other end of left web connection steel pipe 26 passes left web gravity vent 18 and fixed by fastener and the steel pipe that is positioned at case beam inner chamber 2; Right web maintenance platform 23 is established on the right side of the right web 3 of case beam, and (right web maintenance platform 23 is by steel pipe, fastener is formed by connecting), the bottom of right web maintenance platform 23 is by fastener and pricncipal rafter 15, truss lower chord 13 is fixedly connected, the middle part of right web maintenance platform 23 is fixedly connected with a right end of fixedlying connected steel pipe 25 by fastener, the other end of right fixedly connected steel pipe 25 is fixedlyed connected with right pole steel tube 14 by fastener, the top of right web maintenance platform 23 is fixedly connected by fastener is connected steel pipe 27 with right web a end, and the other end of right web connection steel pipe 27 passes right web gravity vent 19 and fixed by fastener and the steel pipe that is positioned at case beam inner chamber 2;
7) hang close order safety net below pricncipal rafter 15, the left web maintenance platform 22 and lay springboard respectively above the right web maintenance platform 23, pricncipal rafter 15; Left side web maintenance platform 22, right web maintenance platform 23 are hung safety net.The component and fitting material quality requirement:
1, steel pipe: steel pipe should have the product quality quality certification.Scaffolding steel pipe adopts No. 3 common steel tubes of regulation in existing national standard " vertical masonry joint electric welded steel pipe " (GB/T 12793) or " low-pressure fluid is carried and used welded steel pipe " (GB/T 3092), and its quality should meet the regulation of Q235 one A level steel in the existing national standard " structural carbon steel " (GB/T 700).Steel pipe adopts φ 48*3.5, does not have serious bending, flattening, crackle, scabs, phenomenons such as layering, dislocation, hard curved, impression and corrosion, and steel tube surface is answered straight smooth and scribble rustproof paint.
2, wire rope: wire rope and rope clamp setting should strict be selected for use by regulation model in the scaffold calculated description.
3, fastener: no embrittlement, distortion, stripped thread phenomenon, good mechanical property also carries out antirust processing.The fastener mechanical performance meets " GB-978-67 " regulation KT33-S technical standard.
4, springboard: adopt the bamboo springboard, length is 2.7m, and width is 25cm, and thickness is 5cm, non-loosening, sliding phenomenon.
5, safety net: the railing purse seine is selected the dense mesh type safety vertical net of the 1.8*6m of qualified polyvinyl chloride weaving for use, and safety net should be and is not less than 2000 orders/100cm
2The dense mesh type safety vertical net.Require the quality certification, safety check to demonstrate,prove complete.Scaffold building and requirement safe in utilization:
1, the scaffold cradle operating personnel must pass through national current standard " job that requires special skills personal security technical examination rule " and (GB5036) examine qualified professional scaffolder, hold special hilllock personnel's job qualification certificate.
2, scaffold cradle is set up personnel Safety helmets must be worn, fasten the safety belt, wear on-slip shoes.Scaffold cradle is set up needs the limit scrap (bridge) to hang safety net.
3, the component and fitting of scaffold cradle with set up quality, set up the distance of each rod member and connect and must meet the demands in strict accordance with the technical requirements of job specfication.Scaffold cradle is set up and is finished, and inspects for acceptance by the regulation and the scaffold cradle calculated description of " building operations fastener steel tube scaffold technical specification of security ", and qualified rear is accurate uses.
4, the construction number on the scaffold cradle operation platform, stacking material will must not overload by the strict control of design load.Working load will evenly be arranged on the scaffold, must not concentrate on one side, causes one-way eccentric stressed.Forbid to hang crane gear on each rod member of scaffold cradle.
5, the know-how personnel being set in the work progress checks scaffold cradle master suspension centre and connection fastener.Boat scaffold is removed:
1, scaffold should in time be removed after finishing its function of use.When removing scaffold, remove the rubbish foreign material on the scaffold floor earlier, forbid downward throwing.Shelf should be divided the operation area when removing, and warning line is set during dismounting, establishes distinguishing mark, and ground is provided with the special messenger commander, forbids in non-operating personnel goes into.
2, the dismounting of scaffold is with to set up order just in time opposite, after take earlier and tear open, take afterwards earlier and tear open.
3, remove the carrying out that scaffold must be step by step, according to principle from top to bottom, a step one removes clearly, can not two steps or remove simultaneously more than two steps.As required, can set up interim support during dismounting.When segmentation was removed, the discrepancy in elevation should be greater than two steps.When going on foot greater than two, carry out consolidation process by the scaffold opening as the discrepancy in elevation.Ascend a height facility, scaffold removed synchronously with being connected with scaffold of pontic.
Claims (1)
1. the erection method of the outer boat scaffold of box-type bridge beam body maintenance works case is characterized in that it comprises the steps:
1) utilize a bridge pier inspection platform of former bridge or utilize the place at bridge pier place set up full hall scaffold as suspension bracket the construction platform of taking root, with this suspension bracket construction platform of taking root is support, sets up horizontal steel tube (8), vertical left wire rope (9), vertical right wire rope (10), truss lower chord (13), left pole steel tube (12), right pole steel tube (14) in first row's the case:
At first along box-type bridge laterally at the left part of the case beam base plate (5) of box-type bridge beam body, right part is opened the first row left hole (6), right hole (4), horizontal steel tube (8) in first case of arranging is laterally placed on the edge in case beam inner chamber (2), first row's vertical left wire rope (9) passes cover and hangs on the interior horizontal steel tube (8) of case from first row's left hole (6), the two ends of vertical left wire rope (9) constitutes left steel wire loop by rope clamp is fixedly connected, first row's vertical right wire rope (10) passes cover and hangs on the interior horizontal steel tube (8) of case from first row's right hole (4), the two ends of vertical right wire rope (10) is by the right steel wire loop of the fixedly connected formation of rope clamp (11);
First row's truss lower chord (13) is passed first row's left steel wire loop, right steel wire loop; The upper end of left side pole steel tube (12) is passed left hole (6) and is fixedlyed connected with horizontal steel tube (8) in the case that first arranges by fastener, fixedlyed connected with truss lower chord (13) by fastener in the bottom of left side pole steel tube (12), the upper end of right pole steel tube (14) is passed right hole (4) and is fixedlyed connected with horizontal steel tube (8) in first case of arranging by fastener, is fixedlyed connected with truss lower chord (13) by fastener in the bottom of right pole steel tube (14);
2) by the method for horizontal steel tube (8), vertical left wire rope (9), vertical right wire rope (10), truss lower chord (13), left pole steel tube (12), right pole steel tube (14) in the case of setting up first row, along box-type bridge vertically horizontal steel tube, vertical left wire rope, vertical right wire rope, truss lower chord, left pole steel tube, right pole steel tube in case beam base plate (5) is set up second row's case; Progressively set up second row, the 3rd row to another adjacent bridge pier direction cantilever ..., until till needing the maintenance works section intact;
3) fixedlyed connected by the vertical lower link of truss between first row's truss lower chord (13) and second row's the truss lower chord, fixedlyed connected by the vertical lower link of truss between second row's truss lower chord and the truss lower chord that the 3rd arranges, the rest may be inferred;
Pricncipal rafter (15) is set up in the top of truss lower chord, and pricncipal rafter is fixedlyed connected by fastener with left pole steel tube (12), right pole steel tube (14); Vertically go up connecting rod by truss between first pricncipal rafter of arranging and the second row's pricncipal rafter and fixedly connected, vertically go up connecting rod by truss between second row's pricncipal rafter and the 3rd row's pricncipal rafter and fixedly connected, the rest may be inferred; Fixedly connected by vertical bar of truss, truss brace respectively between pricncipal rafter and the truss lower chord; Truss lower chord, pricncipal rafter, vertical bar of truss, truss brace, the vertical lower link of truss, truss are vertically gone up connecting rod and are constituted truss;
4) from the left web gravity vent (18) of the case beam of box-type bridge beam body left side web (7), stretch out left web wire rope (16), fixedly connected with truss lower chord (13) in the lower end of left side web wire rope (16), the upper end of left side web wire rope (16) is positioned at case beam inner chamber (2), is fixed by steel pipe; From the right web gravity vent (19) of the right web of the case beam of box-type bridge beam body (3), stretch out right web wire rope (17), fixedly connected with truss lower chord (13) in the lower end of right web wire rope (17), the upper end of right web wire rope (17) is positioned at case beam inner chamber (2), is fixed by steel pipe;
5) from the left hole (6) of case beam base plate (5), stretch out oblique left wire rope (20), fixedly connected with truss lower chord (13) in the lower end of oblique left wire rope (20), the upper end of oblique left wire rope (20) is positioned at case beam inner chamber (2), and is fixing by horizontal steel tube in the case (8); From the right hole (4) of case beam base plate (5), stretch out oblique right wire rope (21), fixedly connected with truss lower chord (13) in the lower end of oblique right wire rope (21), the upper end of oblique right wire rope (21) is positioned at case beam inner chamber (2), and is fixing by horizontal steel tube in the case (8);
6) left web maintenance platform (22) is established in the left side of case beam left side web (7), the bottom of left side web maintenance platform (22) is by fastener and pricncipal rafter (15), truss lower chord (13) is fixedly connected, the middle part of left side web maintenance platform (22) is fixedly connected with a left end of fixedlying connected steel pipe (24) by fastener, the other end of the fixedly connected steel pipe in a left side (24) is fixedlyed connected with left pole steel tube (12) by fastener, the top of left side web maintenance platform (22) is fixedly connected by fastener is connected steel pipe (26) with left web a end, and the other end of left web connection steel pipe (26) passes left web gravity vent (18) and fixed by fastener and the steel pipe that is positioned at case beam inner chamber (2); Right web maintenance platform (23) is established on the right side of the right web of case beam (3), the bottom of right web maintenance platform (23) is by fastener and pricncipal rafter (15), truss lower chord (13) is fixedly connected, the middle part of right web maintenance platform (23) is fixedly connected with a right end of fixedlying connected steel pipe (25) by fastener, the other end of right fixedly connected steel pipe (25) is fixedlyed connected with right pole steel tube (14) by fastener, the top of right web maintenance platform (23) is fixedly connected by fastener is connected steel pipe (27) with right web a end, and the other end of right web connection steel pipe (27) passes right web gravity vent (19) and fixed by fastener and the steel pipe that is positioned at case beam inner chamber (2);
7) hang close order safety net below pricncipal rafter (15), the left web maintenance platform (22) and lay springboard respectively above the right web maintenance platform (23), pricncipal rafter (15); Left side web maintenance platform (22), right web maintenance platform (23) are hung safety net.
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| CNB2007100528421A CN100494576C (en) | 2007-07-26 | 2007-07-26 | Method for setting up box-type bridge body maintain engineering box outer hanging falsework |
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| CNB2007100528421A CN100494576C (en) | 2007-07-26 | 2007-07-26 | Method for setting up box-type bridge body maintain engineering box outer hanging falsework |
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| CN100494576C true CN100494576C (en) | 2009-06-03 |
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| FI123034B (en) * | 2010-11-12 | 2012-10-15 | Moldtech Oy | Rack Mounting Arrangement |
| CN102587298B (en) * | 2012-04-06 | 2014-05-07 | 河海大学 | Whole bridge jacking construction method without interrupting traffic |
| CN103015713B (en) * | 2012-11-28 | 2014-10-22 | 泰兴市第一建筑安装工程有限公司 | High-altitude-spanned steel reinforced concrete truss template |
| CN107059656B (en) * | 2017-01-04 | 2019-02-15 | 安徽省路桥工程集团有限责任公司 | The construction method of active service bridge maintenance maintenance boat scaffold operating platform |
| CN107201725A (en) * | 2017-06-28 | 2017-09-26 | 杭州伟业建设集团有限公司 | A kind of steel box-girder decoration hanging scaffold and its construction method |
| CN110485315B (en) * | 2019-08-26 | 2020-11-27 | 广西建工集团控股有限公司 | Reinforced concrete bridge suspension anchor type operation platform and construction method thereof |
| CN114059450B (en) * | 2021-07-30 | 2023-12-05 | 山东固特邦土木科技有限公司 | Bridge maintenance scaffold and method thereof |
-
2007
- 2007-07-26 CN CNB2007100528421A patent/CN100494576C/en not_active Expired - Fee Related
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| CN101105024A (en) | 2008-01-16 |
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