CN202787086U - Cantilever pouring construction hanging-basket pre-pressing device - Google Patents
Cantilever pouring construction hanging-basket pre-pressing device Download PDFInfo
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- CN202787086U CN202787086U CN 201220423823 CN201220423823U CN202787086U CN 202787086 U CN202787086 U CN 202787086U CN 201220423823 CN201220423823 CN 201220423823 CN 201220423823 U CN201220423823 U CN 201220423823U CN 202787086 U CN202787086 U CN 202787086U
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- suspension rod
- twisted steel
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Abstract
The utility model relates to the field of the construction of a bridge, in particular to a cantilever pouring construction hanging-basket pre-pressing device, which solves the problems that the existing hanging-basket pre-pressing method is complicated in procedures, high in field requirement, large in construction difficulty and high in safety risk, and the cantilever pouring construction hanging-basket pre-pressing device comprises back-pressure finish-rolling deformed steel bar hanger rods which are respectively arranged on a hanging basket main trussed crossbeam in a penetrating mode and on two sides of two hanging basket main truss, the upper end of each back-pressure finish-rolling deformed steel bar hanger rod is provided with a hydraulic jack, the top end of the back-pressure finish-rolling deformed steel bar hanger rod penetrates into an axis through hole of the hydraulic jack to be anchored through a screw cap, the lower end is embedded inside a secondary carrying platform of a hanging continuous beam main pile, a protection bushing is arranged outside each back-pressure finish-rolling deformed steel bar hanger rod, and the tail of the lower end of each back-pressure finish-rolling deformed steel bar hanger rod is provided with a base plate in a welding way. The cantilever pouring construction hanging-basket pre-pressing device is simple in structure and reasonable in design, solves the defects of the traditional hanging basket pre-pressing method, saves the operation space, avoids the complicated procedure and safety potential danger by adopting a preloading method, improves the working efficiency, guarantees the construction safety quality, reduces the construction cost and accelerates the progress.
Description
Technical field
The utility model relates to field of bridge construction, is specially a kind of cantilever pouring construction hanging basket prepressing device.
Background technology
The cantilever pouring construction method is because its unique superiority is widely used in building Prestressed T shape rigid frame bridge, and prestressed concrete cantilever glider bridge, continuous girder bridge, cable stayed bridge and arch bridge etc., Hanging Basket are main construction equipments in the cantilever pouring construction.For obtaining Hanging Basket elastic deformation and Load Linear relation, eliminate the Hanging Basket nonelastic deformation, before bridge in its assembly unit, answer the construction simulation load to carry out precompressed test, determine that the beam body respectively saves piece construction amount of deflection adjusted value, guarantee that Hanging Basket uses and control the linear precision of beam body construction safely under complex working condition.Preloading method commonly used has sandbag method, reinforcing bar preloading and adopting water tank method at present, and concrete operations are soffit formwork lifting sandbag or the preloading reinforcing bars at Hanging Basket, perhaps use one group of water tank, carry out the precompressed test according to code requirement hierarchical loading and unloading.There is following problem in this way in practice of construction, and the one, complex procedures, test period is longer, and cost is higher; The 2nd, being subjected to the place limitation and closing on existing line affects, and high to site requirements, crane operation is difficulty very, and the construction operation difficulty is large; The 3rd, work high above the ground, preloading object height degree is high, and squeeze time is long, has very high security risk.
Summary of the invention
The problems such as there is complex procedures in the utility model in order to solve in the existing Hanging Basket precompressed institute employing method, site requirements is high, difficulty of construction is large and security risk is high provide a kind of cantilever pouring construction hanging basket prepressing device.
The utility model is to adopt following technical scheme to realize: cantilever pouring construction hanging basket prepressing device, comprise and run through respectively the back-pressure fining twisted steel suspension rod that is arranged on the main truss cradle crossbeam and is positioned at permanent position, two main truss cradle both sides, hydraulic jack is installed in back-pressure fining twisted steel suspension rod upper end, the top of back-pressure fining twisted steel suspension rod penetrates the punching duct, axle center of hydraulic jack and with screw cap anchoring, back-pressure fining twisted steel suspension rod lower end is embedded in the cantilever continuous beam master pier secondary cushion cap.Described hydraulic jack and back-pressure fining twisted steel suspension rod are existing known configurations.
Termination, described back-pressure fining twisted steel suspension rod bottom arranges backing plate, and the backing plate lower end is fixed with matching nut, and the backing plate upper end is provided with the spiral reinforcement that is set in back-pressure fining twisted steel suspension rod, strengthens its tensile property.
The described back-pressure fining twisted steel suspension rod that is embedded in the cantilever continuous beam master pier secondary cushion cap is provided with protective casing outward; when Xuan Guanliang master's pier secondary cushion cap is built concrete; with protective casing pre-buried back-pressure fining twisted steel suspension rod is entangled in order to avoid be stained with concrete in advance; and guarantee the verticality of built-in fitting, reduce to greatest extent the unfavorable factor that affects the amount of deflection change detection.
Adopt structure design of the present utility model, by at the pre-buried back-pressure fining twisted steel of Xuan Guanliang master's pier secondary cushion cap suspension rod, the bottom adds backing plate nut anchoring, and the backing plate upper end is provided with the spiral reinforcement that is set in back-pressure fining twisted steel suspension rod.The design of backing plate and spiral reinforcement has strengthened the tensile property of back-pressure fining twisted steel suspension rod greatly; And be embedded with protective casing; take necessary leak-proof measure, prevent that concrete from entering in the protective casing pipe, reduces the impact of unfavorable factor to greatest extent; simulated really the stress of main truss cradle in real work, for the deflection value of Accurate Determining Hanging Basket load test provides Reliable guarantee.
Compared with prior art, have the following advantages:
1, uses hydraulic jack that main truss cradle is carried out precompressed, avoided that the precompressed balancing weight drops in traditional preloading, easily cause potential safety hazard; Load too fastly, easily cause the Hanging Basket rate of strain to accelerate; Inhomogeneous, the bias voltage of precompressed balancing weight easily produces the Hanging Basket unstability; The adverse effects such as the precompressed counterweight is not enough, and later stage malformation is easy bigger than normal;
2, the pre-buried back-pressure fining twisted steel of cushion cap suspension rod carries out the precompressed operation at main pier secondary cushion cap, has saved operation side, some is closed on the limited worker's point of existing line and construction plant have operability;
3, avoid the complicated procedures of forming such as buying, transportation, lifting of a large amount of preloading objects, greatly saved cost, reduced the security risk of work high above the ground, improved construction efficiency;
4, reduce the use of material such as sandbag, water tank, precast concrete counterweight, avoided to a certain extent use, stacking, the waste of material, protected environment, be conducive to the ecological homeostasis,
In a word, the utility model is simple in structure, reasonable in design, has solved the drawback of traditional Hanging Basket precompressed, save working space, avoided adopting complicated procedures of forming and the potential safety hazard of piling prepressing, improved operating efficiency, guarantee the safe mass of construction, reduced construction cost, accelerated programming.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the lateral view of Fig. 1;
Fig. 4 is the pre-buried structure schematic diagram of back-pressure fining twisted steel suspension rod;
Among the figure: 1-main truss crossbeam; The 2-main truss cradle; 3-back-pressure fining twisted steel suspension rod; The 4-hydraulic jack; 5-cantilever continuous beam master pier secondary cushion cap; The 6-backing plate; The 7-protective casing; 8-cantilever continuous beam master pier one-level cushion cap; 9-cantilever continuous beam master pier pier shaft; The 10-hanging basket main truss front supporting point; 11--main truss cradle rear fulcrum; The 12-nut; The 13-spiral reinforcement.
The specific embodiment
Cantilever pouring construction hanging basket prepressing device; such as Fig. 1; 2; 3; shown in 4; comprise running through respectively and be arranged on the main truss cradle crossbeam 1; and be positioned at the back-pressure fining twisted steel suspension rod 3 of permanent position, two main truss cradle 2 both sides; as shown in Figure 1; be four back-pressure fining twisted steel suspension rod a; b; c; d; hydraulic jack 4 is installed in the upper end; can adopt centre-hole jack; the top of back-pressure fining twisted steel suspension rod penetrates the punching duct, axle center of hydraulic jack and with screw cap anchoring; can adopt the double nut anchoring; back-pressure fining twisted steel suspension rod 3 lower ends are embedded in the cantilever continuous beam master pier secondary cushion cap 5; the pre-buried degree of depth is not less than 1m; and the outside is provided with protective casing 7, is the PVC sleeve pipe, and termination, back-pressure fining twisted steel suspension rod 3 bottom arranges backing plate 6; the backing plate lower end arranges matching nut 12, and the backing plate upper end is provided with the spiral reinforcement 13 that is set in back-pressure fining twisted steel suspension rod.
During concrete operations, can carry out according to the following steps:
1, consider the characteristics of cantilever construction concreting, the beam body section is concreting in the following order: first base plate front portion is to the rear portion, again to web, so jack tension sequentially is: first b, c, again a, d;
2, stretch-draw and monitor procedure are: level measurement---stretch-draw 20%(stopped 1 hour, measured)-80%(stopped 4 hours, and measurements-100%(stopped 12 hours, measured once in per 6 hours)-120% (stopped 24 hours, measurement in per 12 hours is once);
3, as b, can stop when c is pulled to first calculated stress, then drawing a, d to equal calculated value, measure again, transfer to again b, c stretch-draw.Repeatedly until be pulled at last 120% computing power, record respectively the deflection of each loaded segment like this;
4, load used load and will first through conscientiously calculating, guarantee that data are accurate.Loading procedure should evenly apply loading force, prevents serious bias voltage unstability.Personnel and facility are wanted coordinative operation in the links, confide a technological secret in strict accordance with constructure scheme and carry out operation, guarantee finishing smoothly of precompressed work.
Above-mentioned by adopting device described in the utility model to carry out the method that Hanging Basket loads, can reduce a large amount of preloading objects, quick, easy, easy operating.
Claims (3)
1. cantilever pouring construction hanging basket prepressing device, it is characterized in that comprising and run through respectively the back-pressure fining twisted steel suspension rod (3) that is arranged at main truss cradle crossbeam (1) upward and is positioned at two main truss cradles (2) both sides, hydraulic jack (4) is installed in back-pressure fining twisted steel suspension rod upper end, the top of back-pressure fining twisted steel suspension rod penetrates the punching duct, axle center of hydraulic jack and with screw cap anchoring, back-pressure fining twisted steel suspension rod (3) lower end is embedded in the cantilever continuous beam master pier secondary cushion cap (5).
2. cantilever pouring construction hanging basket prepressing device according to claim 1, it is characterized in that termination, back-pressure fining twisted steel suspension rod (3) bottom arranges backing plate (6), the backing plate lower end is fixing with matching nut (12), and the backing plate upper end is provided with the spiral reinforcement (13) that is set in back-pressure fining twisted steel suspension rod.
3. cantilever pouring construction hanging basket prepressing device according to claim 1 and 2 is characterized in that being embedded in the outer protective casing (7) that is provided with of back-pressure fining twisted steel suspension rod (3) in the cantilever continuous beam master pier secondary cushion cap (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423823 CN202787086U (en) | 2012-08-24 | 2012-08-24 | Cantilever pouring construction hanging-basket pre-pressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423823 CN202787086U (en) | 2012-08-24 | 2012-08-24 | Cantilever pouring construction hanging-basket pre-pressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202787086U true CN202787086U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220423823 Expired - Fee Related CN202787086U (en) | 2012-08-24 | 2012-08-24 | Cantilever pouring construction hanging-basket pre-pressing device |
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| CN (1) | CN202787086U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131516A (en) * | 2014-08-14 | 2014-11-05 | 江苏省交通工程集团有限公司 | Bridge cast-in-cantilever method cradle counter-pressure construction method |
| CN106702906A (en) * | 2016-12-09 | 2017-05-24 | 中铁八局集团昆明铁路建设有限公司 | Pre-pressing device for hanging baskets and pre-pressing method thereof |
| CN107893379A (en) * | 2017-11-03 | 2018-04-10 | 中国水利水电第七工程局有限公司 | A kind of concrete continuous Cantilever Construction load equilibrium adjusting means and adjusting method |
| CN109056556A (en) * | 2017-12-29 | 2018-12-21 | 中铁二局第工程有限公司 | A kind of Hanging Basket trussing entirety prepressing structure and preloading method |
| CN110607765A (en) * | 2019-06-19 | 2019-12-24 | 东南大学 | Intelligent bridge hanging basket prepressing device and control method thereof |
-
2012
- 2012-08-24 CN CN 201220423823 patent/CN202787086U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131516A (en) * | 2014-08-14 | 2014-11-05 | 江苏省交通工程集团有限公司 | Bridge cast-in-cantilever method cradle counter-pressure construction method |
| CN106702906A (en) * | 2016-12-09 | 2017-05-24 | 中铁八局集团昆明铁路建设有限公司 | Pre-pressing device for hanging baskets and pre-pressing method thereof |
| CN107893379A (en) * | 2017-11-03 | 2018-04-10 | 中国水利水电第七工程局有限公司 | A kind of concrete continuous Cantilever Construction load equilibrium adjusting means and adjusting method |
| CN109056556A (en) * | 2017-12-29 | 2018-12-21 | 中铁二局第工程有限公司 | A kind of Hanging Basket trussing entirety prepressing structure and preloading method |
| CN110607765A (en) * | 2019-06-19 | 2019-12-24 | 东南大学 | Intelligent bridge hanging basket prepressing device and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20200824 |