CN202466421U - High-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas - Google Patents
High-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas Download PDFInfo
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- CN202466421U CN202466421U CN 201220034455 CN201220034455U CN202466421U CN 202466421 U CN202466421 U CN 202466421U CN 201220034455 CN201220034455 CN 201220034455 CN 201220034455 U CN201220034455 U CN 201220034455U CN 202466421 U CN202466421 U CN 202466421U
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Abstract
The utility model belongs to the technical field of concrete delivery, and in particular relates to a high-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas, solving the problems that in the existing bridge body concrete construction in a gully area, concrete pumping construction is carried out at the bottom of a gully, the concrete delivery distance is large, the shortcut delivery can not be realized by the influence of weather reason; and if high-fall pumping is carried out, a pumping line is blocked easily. The high-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas comprises a steel truss, wherein one end of the steel truss is installed on a support steel pier, and the other end of the steel truss is installed on the bridge body; the support steel pier is installed on a concrete pile foundation; the concrete pile foundation is arranged on a gully bank at one side of a ground pump arranged in the gully. The high-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas provided by the utility model has the beneficial effects that the high-pier bridge body concrete delivery issue in the gully areas is solved, the project cost is lowered greatly, the construction period is shortened, the construction quality is improved, and the device is utilized fully.
Description
Technical field
The utility model belongs to the technical field of transmission and concrete transmission, is specifically related to the high pier bridge beam body concreting pump line in area, a kind of gully and lands the steel truss trestle.
Background technology
Be positioned at railway, the construction of the highway of mountain region, knob, the overwhelming majority all adopts the high pier bridge to pass through, and limit by height, and concrete vertically transports difficulty through general automotive pump and ground pump even can not realize.Even can carry, because of plugging greatly very easily appears in the vertical discrepancy in elevation, and adopt the ground pump vertically to transport concrete, pump line is installed, is removed, the maintenance difficulty is big, and input cost is high.
For example a certain big bridge construction need be crossed over a loess coombe, ditch depth 90m, and cheuch is narrow, and bank slope is high steep, degrades unfavorable geology such as serious, straggly, loess cratering naturally and grows, and engineering geological conditions is complicacy.The bridge site place top gradient is more slow, and the bottom is steep, and bottom of trench is narrow straight, and the accumulation soil body that caves in is on a small quantity arranged.Shrub, weedy in the ditch, loess is exposed on the steep bank.Left side ditch bank natural grade surpasses 70 °, and ditch bank maximum natural grade in right side reaches 60 °, and ditch bank nature angle of repose is much larger than the final angle of stability of its bank slope (being generally 30 °), and the cheuch bank slope is in understable state.The 1# pier is among the loess coombe that reaches 90m deeply.
Concrete mixing plant reaches the interim sidewalk route of 1# pier: because the discrepancy in elevation is big, needs to detour to bottom of trench 1# Dun Chu through the right side from agitator, and the long 2200m of sidewalk, because the restriction of landform, more than the sidewalk many places gradient 35 degree.1# pier shaft height is 56m, and 0# section beam height degree is 11.5m, is carrying out beam body concrete when construction, if carry out the concrete pumping construction at bottom of trench, not only concrete haul distance is far away, and receives the transportation of weather cause influence sidewalk and can not realize; If be high drop pumping in the concrete pumping process, very easily cause pumping line to stop up.
Summary of the invention
The goal of the invention of the utility model: in order to solve area, existing gully when carrying out the bridge beam body concrete construction, carry out the concrete pumping construction at bottom of trench, not only concrete haul distance is far away, and receives the transportation of weather cause influence sidewalk and can not realize; If be high drop pumping in the concrete pumping process, very easily cause the pumping line blocking problem.
The utility model adopts following technical scheme to realize:
The high pier bridge beam body concreting pump line in gully area lands the steel truss trestle; It is characterized in that comprising steel truss; Steel truss one end is installed on and supports on the steel pier; The other end is installed on Liang Tishang, and described support steel pier is installed on the concrete pile foundation, and concrete pile foundation is arranged at ditch that the gully is provided with ground pump one side on the bank.
Another preferred version of the utility model: steel truss adopts the seamless steel pipe welding, and the cross section is a triangular structure.
Another preferred version of the utility model: concrete pile foundation comprises pilework and cushion cap, the pre-buried four pre-embedded steel slab I in cushion cap top, and vertical welding H-bar, transverse weld channel-section steel constitute the supporting member that supports the steel pier on the pre-embedded steel slab I.
Another preferred version of the utility model: support the steel pier and on line direction, weld bracket.
Another preferred version of the utility model: the position pre-embedded steel slab of steel truss is installed at beam body top, and the anchoring of No. 1 section leading portion of beam body has i iron to strengthen the supported steel truss.
The utlity model has following beneficial effect:
1), solved the problem of the high pier bridge beam body transmission and concrete transmission in area, gully,
2), greatly reduce the cost of project,
3), shortened the construction period and improved construction quality,
4), equipment is fully used.
Description of drawings
Fig. 1 is the sketch map of the utility model,
Fig. 2 is the longitudinal profile sketch map of steel truss trestle,
Fig. 3 is a steel work pier sketch map,
Fig. 4 is the lateral view of Fig. 3,
Fig. 5 is a steel truss installation place beam body pre-embedded steel slab sketch map,
Fig. 6 is the A-A sectional drawing of Fig. 5,
Among the figure: 1-ground pump, the 2-pump line, 3-master's platform, the 4-concrete foundation, 5-supports the steel pier; The 6-steel truss, 7-beam body, 8-contact net rack platform, 9-i iron are strengthened supporting the 10-upper chord; The 11-lower chord, 12-brace, 13-foot rest, 14-sheer pole, 15-channel-section steel; The 16-i iron, 17-pre-embedded steel slab I, 18-pilework, 19-cushion cap, 20-pre-embedded steel slab II.
The specific embodiment
The high pier bridge beam body concreting pump line in gully area lands the steel truss trestle; Comprise steel truss 6; Steel truss 6 one ends are installed on and support on the steel pier 5; The other end is installed on the beam body 7, and described support steel pier 5 is installed on the concrete pile foundation 4, and concrete pile foundation 4 is arranged at ditch that the gully is provided with ground pump 1 one sides on the bank.Steel truss 6 adopts the seamless steel pipe welding, and the cross section is a triangular structure.Concrete pile foundation 4 comprises pilework 18 and cushion cap 19, the pre-buried four pre-embedded steel slab I 17 in cushion cap 19 tops, and vertical welding H-bar 16, transverse weld channel-section steel 15 are for supporting the supporting member of steel pier on the pre-embedded steel slab I 17.The position pre-embedded steel slab of steel truss is installed at beam body 7 tops, and the anchoring of No. 1 section leading portion of beam body has i iron to strengthen supporting 9 supporting steel truss.Pump line is descending on the transmission and concrete transmission direction.Ground pump and the pump line that supports between the steel pier support through main platform.
Engineering situation with in the background technology is embodiment, further specifies the specific embodiment of the utility model, and its construction sequence is following:
1, pump line steel truss welding
Because the steel truss span is big, the difficulty of lifting need reduce the deadweight of structure and add the rigidity of macrostructure own when considering construction, and steel truss master material adopts the seamless steel pipe welding, and triangular structure is adopted in the cross section, and is as shown in Figure 2.The steel truss total length is 72.5m, the high 2.2m of triangular cross-section, and bottom width 1.5m (size between the chord member center) prolongs the every 1.8m of longitudinal direction the montant that is connected between a upper chord and the lower chord is set.It is the seamless steel pipe of 114-5 that the steel truss upper chord adopts model; Two lower chords are the 89-5 seamless steel pipe; Be connected the seamed steel pipe that montant adopts 48-4 between upper chord and the lower chord; Bracing diagonal between upper chord and the lower chord is the seamless steel pipe of 70-5, and the connection cross bar between two lower chords adopts 80 channel-section steels.The about 6.3t of steel truss gross weight.
In order to prevent that concrete from flowing backwards, make the pump line steel truss on the transmission and concrete transmission direction, be descending (gradient is generally 3 ~ 10 ‰).Adopt steel concrete platform of hole digging pile basis, base concrete adopts the C30 concrete, and basic main muscle adopts HRB235 Φ 22 reinforcing bars, and dimension of platform is 4 * 5 * 1.0m, and 4 pile based structures size diameter are 0.8m, and length is 10m.Pre-buried four blocks of 0.5 * 0.5 * 0.2m steel plates above cushion cap, welding 40a i iron prolongs vertical every 1.2m and adopts 14a channel-section steel setting horizontal company together, to guarantee the globality of pier shaft as the main bearing member that supports the steel pier on it between the main i iron.The steel pier is at the bracket of two 7.2m of line direction welding, to reduce the span of steel truss.Bracket and bracket below diagonal brace adopt the welding of 40a i iron, adopt the 14a channel-section steel to connect between two brackets.At 75 angle steel that length is 0.3m of the every 0.5m welding of bracket upper outer, angle steel is the 45 degree, and is in place when lifting to help steel truss.After steel truss set up, at the inboard welding of steel truss lower edge two bars 80 channel-section steels, channel-section steel extensions road direction was "] " welding, to guarantee that steel truss laterally can not move.Like Fig. 3, shown in Figure 4.
Pre-embedded steel slab and reinforcing bar, steel truss chord member and its welding on the contact net base rack platform of 0# section middle part.Guarantee that steel truss can not move horizontal and vertical herein.Like Fig. 5, shown in Figure 6.Steel truss left end and main platform connection are provided with 2m * 2m concrete foundation, basic end face pre-embedded steel slab, welding 114-5 seamless steel pipe.Be enclosed within the steel truss lower chord in the welding 114-5 seamless steel pipe with fixing steel truss, make the steel truss end vertically producing displacement in crosswise fixed.
In addition, stable for stiffening girder side steel truss, pre-buried 4 Ф 32 fining twisted steels are anchoring with it in 1# section beam body concrete, and the outer outstanding support that is welded by i iron 40b further reaches the minimizing span with supporting steel truss, increases stable effect.
2, the pump line steel truss is made
The trestle assembling is divided into the welding of pump line steel truss, support steel pier welded and installed and concrete foundation and builds.Steel truss when welding since the time welding place restriction, the steel truss length overall is that 72.5m is divided into two sections welding.First section 50m, second section 22.5m, wind up in two sections jointing places, the lower chord cut-off point staggers, and distance is not less than 3.6m.
3, pump line steel truss lifting
Before the steel truss lifting, with total powerstation setting-out place steel truss two ends end position line.Adopt the thinking of halieutics during the steel truss lifting; Lifting first segment length is the steel truss of 50m in the place promptly to use the 25t crane before the platform platform of 2# bridge right side, to harden; Behind the lifting steel truss liftoff 1m-2m steel truss is moved 3m ~ 4m to 1# pier direction, lift by crane once more to 1# pier direction and move moving 3m ~ 4m behind the Heave Here then.After circulating so one by one, adopt 1# pier position tower crane to hang steel truss 1# pier direction one end end, lift by crane simultaneously with crane steel truss is moved to 1# pier direction.First section steel truss is welded as a whole second section steel truss after 1# pier direction moves 25m at right direction and first section steel truss.After the steel truss welding was accomplished, tower crane and crane lifted by crane simultaneously steel truss are moved into place, alignment steel truss end position line.After steel truss moves into place with steel truss lift two ends support to go up after with steel truss fulcrum place and steel support pier firm welding.
After accomplishing, each spot welding of steel truss hangs cable rope at span centre lower chord node place.Steel truss is laid pump line and the remarkable treadle plate of maintenance pump line after fixing completion the on the steel support pier.
4, stressed inspection is calculated
The main inspection item of this trestle has: intensity, rigidity, stability stressed after the installation of steel truss pump line, Force Calculation, steel support pier inspection calculation, concrete pile foundation etc. when the steel truss pump line lifts all satisfy the concrete pumping requirement, and under the least favorable load, also can doublely do remarkable passage and use.The not existing here inspection calculation process of listing in detail.
5, the beneficial effect of such scheme:
1), solved the problem of transmission and concrete transmission,
Carry out the concrete pumping construction if be employed in bottom of trench,, limit by landform because of the vertical discrepancy in elevation is 67.5m; Can only at the bottom of the 1# pier, lay the ground pump,, then add the level transportation again as pouring into a mould each cantilever segment; The long 108m of this bridge single hole; Be 83m after removing cast-in-place section 25m, adopt the horizontal 83m transportation of the existing vertical 67.5m+ of 80 ground pumps concrete extremely difficult, even possibly not realize.Adopt the described method level transportation of the utility model to be 130m, solved the hang-up of transmission and concrete transmission.
2), greatly reduce the cost of project,
Adopt trestle to carry concrete, 20.2 tons of steel take place altogether, concrete 23.2 sides, Ф 0.8m drilled pile 48m, ten thousand yuan of rough estimated cost input 20.2* (8000-2200)+23.2*450+40*800=15.96.
And employing pump line vertical transport; The fixed pump pipe scaffold of setting up, and maintenance channel have then spent 20 tons of scaffolds, 15.62 cubes of planks, do not consider under season, weather, management, the external environment influence; About 18*12=216 calendar day of beam body cantilever segment construction period; According to market price, about 6.5 yuan of scaffold value of leass/t/ days, 2500 yuan/cube of timber fabrication and processing; 23000 yuan/month of concrete tank leases, then cost will be given birth to: ten thousand yuan of 6.5*20*216+15.62*2500+23000*216/30=23.3.Rough calculation is saved ten thousand yuan of cost 23.3-15.96=7.34.
3), shortened the construction period and improved construction quality,
Carrying out beam body concrete when construction, if carry out the concrete pumping construction at bottom of trench, because of the pioneer road gradient big; The sidewalk transportation then can not realize when receiving the weather cause influence; And concrete is vertical+all bigger pumping process of horizontal length in, very easily cause pumping line to stop up, and maintenance is dangerous, slowly; Will certainly prolong the construction period, even can give and to come great quality risk by the concrete case sill bolt of continous pouring.
4), equipment is fully used,
Because be beam body continuous rigid frame case beam, and single hop concrete square amount is big, necessary subsequent use 1 tableland pump in construction; And existing machinery equipment is 1 60 ground pump, and 1 80 ground pump is for reducing to be interrupted because of the ground pump risk of perfusion; Adopt 60 ground pumps to carry out vertical transport, 80 ground pumps are subsequent use.And 60 ground pumps just break down when perfusion 0# section concrete once in a while, and instrument shows painstaking, can only use 80 ground pumps, so have certain risk because of subsequent use ground pump a little less than showing during concrete spouting.And after the transportation of realization level, former 60 ground pump pumping of concrete smoothly, normally are fully used.
5), after horizontal trestle comes into operation, the constructor can directly pass through the operation of trestle upper beam, has made things convenient for the workman, has reduced the loss time on working road.And elevator then be mainly used in the vertical transport of small-sized worker's facility, two or three material has reduced this bridge to do the operating pressure of two width of cloth bridges simultaneously because of 1 tower crane, the phenomenon of " expect etc. hang " before having stopped basically.
Claims (4)
1. the high pier bridge beam body concreting pump line in area, a gully lands the steel truss trestle; It is characterized in that comprising steel truss (6); Steel truss (6) one ends are installed on and support on the steel pier (5); The other end is installed on the beam body (7), and described support steel pier (5) is installed on the concrete pile foundation (4), and concrete pile foundation (4) is arranged at ditch that the gully is provided with ground pump (1) one side on the bank.
2. the high pier bridge beam body concreting pump line in area, gully according to claim 1 lands the steel truss trestle, it is characterized in that steel truss (6) adopts the seamless steel pipe welding, and the cross section is a triangular structure.
3. the high pier bridge beam body concreting pump line in area, gully according to claim 1 lands the steel truss trestle; It is characterized in that concrete pile foundation (4) comprises pilework (18) and cushion cap (19); Cushion cap (19) top pre-buried four pre-embedded steel slab I (17), pre-embedded steel slab I (17) go up vertical welding H-bar (16), transverse weld channel-section steel (15) for supporting the supporting member of steel pier.
4. the high pier bridge beam body concreting pump line in area, gully according to claim 1 lands the steel truss trestle; The position pre-embedded steel slab that it is characterized in that beam body (7) top installation steel truss, the anchoring of No. 1 section leading portion of beam body have i iron to strengthen supporting (9) supporting steel truss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220034455 CN202466421U (en) | 2012-02-03 | 2012-02-03 | High-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220034455 CN202466421U (en) | 2012-02-03 | 2012-02-03 | High-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas |
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| Publication Number | Publication Date |
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| CN202466421U true CN202466421U (en) | 2012-10-03 |
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| CN 201220034455 Expired - Lifetime CN202466421U (en) | 2012-02-03 | 2012-02-03 | High-pier bridge body concrete pouring pump line grounded steel truss trestle bridge in gully areas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887656A (en) * | 2016-04-25 | 2016-08-24 | 唐红梅 | Emergency repairing gallery road for roadbed missed section of mountain area highway and installation method of emergency repairing gallery road |
| CN115450126A (en) * | 2022-09-30 | 2022-12-09 | 中铁二十局集团第一工程有限公司 | Bridge supporting structure and construction method |
-
2012
- 2012-02-03 CN CN 201220034455 patent/CN202466421U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887656A (en) * | 2016-04-25 | 2016-08-24 | 唐红梅 | Emergency repairing gallery road for roadbed missed section of mountain area highway and installation method of emergency repairing gallery road |
| CN115450126A (en) * | 2022-09-30 | 2022-12-09 | 中铁二十局集团第一工程有限公司 | Bridge supporting structure and construction method |
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Legal Events
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| GR01 | Patent grant | ||
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Granted publication date: 20121003 |