CN2633942Y

CN2633942Y - Double lane double-layer inverted tension steel cable bridge

Info

Publication number: CN2633942Y
Application number: CNU03234726XU
Authority: CN
Inventors: 刘北辰; 许德庆; 彭龙泉; 孙一鹏
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2003-05-30
Filing date: 2003-05-30
Publication date: 2004-08-18
Anticipated expiration: 2013-05-30

Abstract

The utility model provides a double lane double-layer inverted tension steel cable bridge with low cost and is capable of moving and making heavy cars oppositely run to successfully span the zanjon, canyon and tachydromile. The steel cable bridge mainly comprises a tension arched cable, a bridge cable, a bridge deck, a traffic lane board, a draw rod, a railing, a bracket, a tightwire anchor, wherein, the tension arched cable is arranged below the bridge cable to form a tension arched type double-layer structure, and an upper bearing cable is loaded by utilizing the tensile force of a lower tension arched cable and a connect pole connecting the upper bearing cable and the lower tension arched cable. When a movable load is on the bridge, the downward transformation caused by the upper bearing cable automatically releases the lower tension arched cable. When set up, the upper applied load automatically reduces or disappears because of the tensile force of the lower layer cable, and the work sagging of the bridge deck does not surpass 3.2 parts in 103 of the span. Therefore, the utility model is convenient to dismantle, install and convey, and is suitable for the bridge for transportation, construction, and water crossing where the span of the zanjon, canyon and tachydromile is needed.

Description

The double-deck inverted tension type steel cable bridge of two-way traffic

One, technical field: cableway bridge.

Two, background technology: cable bridge has that cost is low, span is big, the time of setting up is short, be convenient to cross over outstanding advantage such as deep mountain stream torrent, is exactly a kind of important bridge type since ancient times.Steel cable bridge on its famous typical case such as the Dadu River.The greatest weakness of old-fashioned steel cable bridge is that lateral stability is poor, and when the automobile bridge, a little axis of departing from bridge of automobile promptly can cause tilting of bridge floor, more can not be provided with two tracks (two-way traffic).Actual measurement shows: when vehicle's center of gravity departs from 22 centimetres of bridge floor center lines, the bridge floor side direction inclination angle of old-fashioned steel cable bridge promptly reaches 4 ° 30.

The name that the applicant has is called the steel cable bridge of " novel steel cable bridge " (patent No. 90201894.9), it is a kind of bicycle road cable bridge, it is also by vang, pull bar, crossbeam, bridge floor rope, bridge plate, bridge railing rope etc. are formed, but, make its utilization field be restricted because it is defectives such as bicycle road, vehicle can not be split, the maximum load-carrying capacity of bridge floor is little.

According to the defective of above-mentioned known technology, the applicant has designed the double-deck inverted tension type steel cable bridge of this two-way traffic on above-mentioned novel steel cable bridge basis.

Three, summary of the invention

1, the purpose of this utility model is that a kind of bridge floor of design has two tracks, vehicle to split, and maximum load-carrying capacity is 120 tons, and the work that produces behind the bridge on mobile load distortion is less than 3.5/1000ths inverted tension type steel cable bridge of span.

2, technical scheme: Figure of description 1.2 is composition structure charts of the present utility model.Its by bridge floor rope 1, fall vang 2, girder steel 3, bridge deck 4, lane plate 5, pull bar 6, V-type bolt 7 (see figure 4) railings 8, set bolt 9 (see figure 4)s, bolster 10, cable wire anchor ingot 11 and form.

Bridge floor rope 1 is after bolster 10 distributed support, stretch-draw, and the cable wire headgear tube of having cast by two ends is anchored on the anchor ingot 11; Fall vang also after the stretch-draw with the method anchoring; Bolster 10 and anchor ingot 11 are embedded on the ground respectively; Girder steel 3 is upper and lower double-layer structure, and back, upper and lower girder steel location is fastening with bridge floor rope 1 with set bolt 9; V-type bolt and one lasso trick folder are falling vang 2 clamping (see figure 4)s; One end and the V-type bolt 7 of pull bar 6 entangle firm, have screw thread one end to be connected with girder steel 3 with nut and the lifting of falling the vang fastening nut afterwards that puts in place; Bridge deck are to be connected the dimension board that is combined into bolt with band steel, each combination dimension board two boring, fixed with door type bolt and bridge floor rope through preservative treatment; Lane plate divides upper and lower two-layer, under be placed on the bridge deck 4, use the steel nail stickfast, upper strata and lower floor's fissure of displacement place on the lower floor, use earlier the steel nail stickfast, with vertical placement boring angle steel upper and lower two-layer lane plate 5 is seen through bridge deck 4 break joints with the perforation band steel again and be connected with bridge floor rope 1 with bolt; Railing 8 welds on girder steel 3, and perforate on the bar is passed the rope head with thin tightwire and is anchored on the anchor ingot, is cemented on the bridge floor rope with metallic combination fancy railing sheet between per two bars.

Below the bridge floor rope, be provided with down vang 2, by pull bar and crossbeam with two kinds of ropes formation double-decker that connects together; Bridge deck 5 are laid two tracks on bridge floor, the bridge deck in two tracks separate, and girder steel is an integral body.

Design principle of the present utility model adopts double-decker for the single layer structure of (1) steel cable bridge of abandoning over, and the upper strata is track cable (a bridge floor rope), and we are called down vang lower floor.(2) this double-decker is by load transfer requirement design, that is: in erection process, utilize tensile force that the bottom opened and be connected upper strata track cable and lower floor and fall the pull bar of vang, and the upper strata track cable is loaded; After this, when mobile load (for example automobile) is gone up bridge, owing to cause the distortion that the upper strata track cable is downward, this sagging distortion can be loosened the vang that falls of lower floor automatically, the load (giving load) that is added in the upper strata because of lower floor's tensile force is reduced automatically or disappear, its effect is equivalent to mobile load (partly or entirely) and has substituted the load of lower floor to the upper strata, has realized the load replacement.(3) can be as requested, the sagging distortion (title work distortion) that increases behind the bridge on mobile load when design is limited in the arbitrarily small scope.(4) can be designed as heavy goods vehicles (having realized 62 tons on bicycle) two-way traffic bridge, transport capacity strengthens.(5) cost is 1/2～1/3 of a steel reinforced concrete bridge, and the construction period is no more than half a year.

3, major advantage is: kept the intrinsic advantage of steel cable bridge, overcome its shortcoming, made its transport capacity increase several times, enlarged the scope of application, be specially adapted to large-scale water power building site as the construction bridge, for substantial contribution is saved in economic construction.

The utility model and known cable way bridge structurally difference are: 120 tons of (1) maximum load-carrying capacities (two 62 tons heavy-duty cars), (2) bridge floor has two tracks, vehicle can be split, also can monolaterally travel, (3) body of a bridge design feature is: the bridge deck in two tracks separately, girder steel is unified, has avoided using long bridge floor material, makes whole bridge one integrated mass again.

Four, description of drawings: Fig. 1 is a plan view of the present utility model, and 1 is the bridge floor rope among the figure, the 2nd, fall vang, and the 3rd, girder steel, the 4th, bridge deck, the 5th, lane plate, the 6th, pull bar, the 7th, V-type bolt, the 8th, railing, the 9th, set bolt, the 10th, bolster, the 11st, cable wire anchor ingot, Fig. 2 are the side elevational view of Fig. 1; Fig. 3 is the A enlarged drawing of Fig. 2, and Fig. 4 is the I-I sectional drawing of Fig. 2; Fig. 5 is bridge deck and lane plate enlarged drawing.

Five, the specific embodiment

Embodiment: downstream, power station, Suofengying, Guizhou Province construction steel cable bridge

(1) bridge is long 155 meters, bridge floor wide 12.1 meters (band sidewalk)

(2) title material

Bridge floor rope Φ 45 6 * 19+IWS steel core cable wire

Steel vang Φ 45 6 * 19+IWS steel core cable wire

Girder steel upper beam 28c# channel-section steel, underbeam 40a# channel-section steel

Pull bar Φ 24 round steel

Bridge deck timber

(3) ratio of mid point total sag and span is 1: 38 when fully loaded (two 62 tons of cars are at span centre), and work sag (sag that increases because of bridge on the automobile) with the ratio of span is: 1: 282.

(4) maximum load-carrying capacity: 128 tons (two 62 tons of automobiles).

Claims

1, the double-deck inverted tension type steel cable bridge of a kind of two-way traffic, mainly by bridge floor rope (1), vang (2), girder steel (3), bridge deck (4), lane plate (5), pull bar (6), V-type bolt (7), railing (8), set bolt (9), bolster (10), cable wire anchor ingot (11) are formed, girder steel is upper and lower double-layer structure, pass with bolt the two is held on the bridge floor rope (1), bridge floor rope and the two ends of falling vang sleeve, anchor rod anchored on the anchor ingot, bolster and anchor ingot are embedded on the ground respectively, pull bar is connected with the girder steel and the vang that falls respectively with bolt, it is characterized in that:

(1) establishes down vang (2) in the below of bridge floor rope (1), form double-deck inverted tension type structure;

(2) have two tracks that bridge deck (5) are laid respectively, the bridge deck in two tracks separate, and girder steel is an integral body;

(3) the work distortion that produces behind the bridge on the mobile load is less than 3.5/1000ths of span.