SUMMERY OF THE UTILITY MODEL
Problem to prior art exists, the utility model provides a high mound walking type jacking die carrier of bridge thin wall pier that construction efficiency is high, the safe risk is low, the quality is secure, overall stability is high and extra consumption is low.
In order to realize the purpose, the utility model adopts the following technical scheme:
a walking type jacking formwork for a high pier of a thin-wall pier of a bridge comprises a truss steel platform, wherein the bottom of the truss steel platform is connected to a supporting steel column and supported by the supporting steel column, the supporting steel column is supported by an upper supporting beam and a lower supporting beam which are supported on the inner wall of the thin-wall pier column, a jacking cylinder is arranged between the upper supporting beam and the lower supporting beam, the upper supporting beam and the lower supporting beam are controlled to alternatively jack through extension and retraction of the jacking cylinder, a suspended scaffold for construction of workers is arranged below the truss steel platform, an outer formwork and an inner formwork which are used for pouring and detaching are further arranged on the periphery of the supporting steel column, and the outer formwork and the inner formwork are lifted and fixed on the truss steel platform.
Further, go up the supporting beam with the both ends of bottom suspension fagging are equipped with the landing leg, the landing leg stretches out or retracts through landing leg hydro-cylinder control, works as go up the supporting beam or when the bottom suspension fagging is in support state, the landing leg passes through the landing leg hydro-cylinder stretches out to insert in the predetermined recess of thin wall pier column inner wall, works as go up the supporting beam or when the bottom suspension fagging is in the off-state, the landing leg pass through the retraction of landing leg hydro-cylinder, with predetermined recess breaks away from.
Further, the jacking cylinder with the operating stroke starting point and the terminal point position of landing leg hydro-cylinder all are equipped with contact switch, work as jacking cylinder arrives starting point or terminal point contact during the contact switch, landing leg hydro-cylinder can start work, work as landing leg hydro-cylinder all contacts during the contact switch, jacking cylinder can only start work.
Furthermore, the outer template is lifted and fixed on the truss steel platform through an electric hoist, and the inner template is fixed on the truss steel platform through a chain block.
Further, go up the supporting beam with install the leading wheel on the supporting beam down, the leading wheel is followed thin wall pier stud inner wall rolls.
Further, hang the scaffold frame and include pylon and interior hanger, the pylon hang in the below of truss steel platform, interior hanger hang in the bottom of a supporting beam down.
Furthermore, protective fences are arranged around the truss steel platform.
The utility model has the advantages that:
the alternative jacking of the upper supporting beam and the lower supporting beam is controlled through the extension and retraction of the jacking oil cylinder, so that the lifting of the turnover formwork and the operation platform can be realized, the cooperation of a tower crane or a crane is not needed, and the cost investment of construction equipment can be effectively reduced. The walking type jacking formwork provides an inner and outer multilayer operation platform and a formwork hoisting device for formwork turnover operation, so that operations such as reinforcement binding, formwork dismounting and concrete pouring of the formwork turnover operation are all performed in a multilayer operation platform which is perfectly shielded, not only construction safety and quality are guaranteed, but also construction efficiency of high piers is obviously improved, and the walking type jacking formwork has the advantages of high construction efficiency, low safety risk, guaranteed quality, high overall stability, low additional consumption and the like.
Drawings
Fig. 1 is a schematic structural view of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model;
fig. 2 is a side view of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model;
fig. 3 is a schematic view of the support state of the upper support beam or the lower support beam in the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model;
fig. 4 is a schematic view of the falling-off state of the upper supporting beam or the lower supporting beam in the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model;
fig. 5 is a schematic view of the construction step one of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model, in which an integral truss steel platform is installed on the first-cast thin-wall pier column;
fig. 6 is a schematic view of the construction step two of the walking type jacking formwork of the high pier of the thin-walled pier of the bridge of the utility model for jacking the steel column;
fig. 7 is a schematic diagram of the construction step three of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model for jacking the lower supporting beam;
fig. 8 is a schematic diagram of the construction steps of the walking type jacking formwork for the high pier of the thin-wall pier of the bridge of the utility model, i.e. four lifting steps;
fig. 9 is a schematic diagram of the construction steps of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model, namely hoisting and binding of the steel bars;
fig. 10 is a schematic diagram of the construction steps of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model, namely six lifting external formworks;
Fig. 11 is a schematic diagram of a seventh construction step of pouring concrete of the walking type jacking formwork of the high pier of the thin-wall pier of the bridge of the utility model;
in the figure, 1-truss steel platform, 2-protective fence, 3-supporting steel column, 4-upper supporting beam, 5-jacking oil cylinder, 6-lower supporting beam, 7-supporting leg, 8-supporting leg oil cylinder, 9-preset groove, 10-thin wall pier column, 11-guide wheel, 12-external hanging frame, 13-internal hanging frame, 14-electric hoist, 15-hydraulic pump station, 16-external formwork and 17-internal formwork.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
As fig. 1 and fig. 2, the utility model provides a high mound walking jacking die carrier of bridge thin wall pier, including truss steel platform 1, 1 frame plane size of truss steel platform is 10.79m x 6.29m, and the truss that forms by HN200 x 100, 12# channel-section steel built-up welding constitutes. The bottom of the truss steel platform 1 is connected to a support steel column 3 and is supported by two pieces of support steel 3, the support steel column 3 is formed by combining and welding 720 x 720 square tubes, and the center distance between the two pieces of support steel column 3 is 4.2 m. The supporting steel columns 3 are supported by upper supporting beams 4 and lower supporting beams 6 which are supported on the inner wall of the thin-walled pier column 10. And protective fences 2 are arranged around the truss steel platform 1 according to the standardized requirements.
As shown in fig. 1, 3 and 4, a jacking cylinder 5 is arranged between the upper supporting beam 4 and the lower supporting beam 6, and the upper supporting beam 4 and the lower supporting beam 6 are alternatively jacked by the extension and retraction of the jacking cylinder 5. The two ends of the upper supporting beam 4 and the lower supporting beam 6 are provided with supporting legs 7, the supporting legs 7 are controlled to extend out or retract through supporting leg oil cylinders 8, when the upper supporting beam 4 or the lower supporting beam 6 is in a supporting state, the supporting legs 7 extend out through the supporting leg oil cylinders 8 and are inserted into preset grooves 9 in the inner wall of the thin-wall pier stud 10, and when the upper supporting beam 4 or the lower supporting beam 6 is in a falling state, the supporting legs 7 retract through the supporting leg oil cylinders 8 and are separated from the preset grooves 9. In order to monitor the in-place condition of the jacking oil cylinder 5 and the supporting leg oil cylinder 8, contact switches are arranged at the starting point and the end point of the working stroke of the jacking oil cylinder 5 and the supporting leg oil cylinder 8, when the jacking oil cylinder 5 reaches the starting point or the end point and contacts the contact switches, the supporting leg oil cylinder 8 can be started to work, and when the supporting leg oil cylinder 8 contacts the contact switches, the jacking oil cylinder 5 can be started to work. The two groups of supporting leg oil cylinders 8 can lead only one group of supporting legs 7 to be recycled through arrangement, and more than one group of supporting legs are always in an extending state. The jacking oil cylinder 5 and the supporting leg oil cylinder 8 are powered by a hydraulic pump station 15. The whole formwork walking climbing is realized by the formwork through alternate work among the upper supporting beam 4, the lower supporting beam 6 and the supporting steel column 3, the operation is simple, other mechanical equipment is not needed, the single pouring height is 4m, the circulation is performed once in 2-3 days, and the operation efficiency is high.
Preferably, the upper supporting beam 4 and the lower supporting beam 6 are provided with guide wheels 11, and the guide wheels 11 roll along the inner wall of the thin-wall pier stud 10, so that the overall stability of the jacking mould frame is improved.
As shown in fig. 1 and 2, a hanging scaffold for construction of constructors is arranged below the truss steel platform 1, the hanging scaffold comprises a pylon 12 and an inner hanger 13, the pylon 12 is hung below the truss steel platform 1 and distributed around the thin- wall pier stud 10, 6 layers are arranged, and except for the top layer which is 1.9m high, the rest layers are 2.0m high. The inner hanging frame 13 is hung at the bottom of the lower supporting beam 6 and is 1 layer, and the layer height is 2.0 m. Through interior stores pylon 12 and stores pylon 13 not only conveniently carry out reinforcement and template ann tear the operation open safely, can in time carry out maintenance and decoration to the pier shaft of having pour simultaneously, effectively guarantee construction safety and quality.
The periphery of supporting steel column 3 still is equipped with and is used for pouring, detachable exterior sheathing 16 and interior template 17, and exterior sheathing 16 is every set by 3 the template that the section height is 2.0m and constitutes, and the height is 6m, uses the preparation of 6mm thick steel plate, and the template is according to interval 0.3m establish [10 channel-section steel inferior stupefied to and set up two [14a channel-section steel main stupefied according to interval 1m, inferior stupefied and main stupefied all assembly welding form. The outer formwork 16 is lifted and fixed on the truss steel platform 1 through the electric hoist 14, after the next section of concrete is poured each time, the outer formwork 16 of the lower section 2 is removed, the electric hoist 14 is adopted for lifting integrally, and the outer formwork 16 of the topmost section is kept not to be removed as a support. Each set of the inner templates 17 is composed of 2 sections of templates with the height of 2.0+2.1m, and the height is 4.1 m. The inner formwork 17 is lifted and fixed on the truss steel platform 1 through the chain block, after the next section of concrete is poured each time, the inner formwork is lifted integrally along with the chain block after the formwork is removed, and the bottom of the inner formwork is clamped with 0.1m of concrete. The templates at the inner chamfer angles are connected by hinges so as to be convenient for removing the templates, and the design of the other templates is the same as that of the outer template. The outer template 16 is integrally lifted through the electric hoist 14, the inner template 17 is integrally lifted along with the chain block, and the cooperation of hoisting equipment is not needed, so that the operation safety risk is reduced.
The utility model discloses high mound walking jacking die carrier of bridge thin wall pier, through the jacking in turn of support beam 4 and under bracing roof beam 6 in stretching out and the withdrawal control of jacking cylinder 5, can realize the promotion of mould and operation platform that turns over, need not tower crane or crane cooperation, can effectively reduce construction equipment cost and drop into. The walking type jacking formwork provides an inner and outer multilayer operation platform and a formwork hoisting device for formwork turnover operation, so that operations such as reinforcement binding, formwork dismounting, concrete pouring and the like of the formwork turnover operation are all carried out in a multilayer operation platform which is perfectly shielded, not only is construction safety and quality guaranteed, but also the construction efficiency of high piers is obviously improved, and better benefits are obtained in project application.
As shown in fig. 5 to 11, the utility model discloses bridge thin wall pier high pier walking jacking die carrier work progress includes following step:
as shown in fig. 5, the first step is that the integral truss steel platform 1 is installed on the first-cast thin-wall pier stud 10, the outer template 16 and the inner template 17 are used for binding reinforcing steel bars, closing a mold, completing a mold frame and casting concrete for the first time, and after the casting of the concrete is completed, the truss steel platform 1 stays at the top of the concrete which is just cast.
As shown in fig. 6, step two: after the concrete reaches the strength, the lower supporting beam 6 is used as a support, the supporting steel column 3 is lifted by one cylinder working stroke (1m) through jacking of the jacking cylinder 5, the upper supporting beam 4 is supported on the pier stud 10, and at the moment, the supporting leg 7 of the upper supporting beam 4 extends out through the supporting leg cylinder 8 and is inserted into the preset groove 9 of the thin-wall pier stud 10 for supporting. Before the supporting steel column 3 is lifted, it is ensured that no hook is arranged among the supporting steel column 3, the upper supporting beam 4 and the pier stud 10.
As fig. 7, step three: the upper supporting beam 4 is used for supporting, the jacking oil cylinder 5 contracts to enable the lower supporting beam 6 to ascend by an oil cylinder working stroke (1m), the lower supporting beam 6 is supported on the pier stud 10, and at the moment, the supporting legs 7 of the lower supporting beam 6 extend out through the supporting leg oil cylinders 8 and are inserted into the preset grooves 9 of the thin-wall pier stud 10 for supporting. Before the lower support beam 6 is lifted, no hook is required between the lower support beam 6 and the support steel column 3 and the pier stud 10.
As shown in fig. 8, step four: and repeating the second step and the third step, and completing the lifting of the truss steel platform 1 and the die carrier in a walking jacking mode. And after the lifting of the integral truss steel platform 1 and the die carrier is finished, the upper supporting beam 4, the lower supporting beam 6 and the supporting steel column 3 are fastened.
As in fig. 9, step five: the reinforcing steel bars are lifted to the truss steel platform 1 by the tower crane to be stacked, and constructors finish the work of reinforcing steel bar binding and acceptance inspection on the truss steel platform 1 and the suspended scaffold.
As shown in fig. 10, step six: and hoisting the outer formwork 16 of the lower concrete layer by using the electric hoist 14 to finish formwork dismantling, cleaning the surface of the outer formwork 16 on the lower suspension scaffold, and lifting the outer formwork 16 to a preset height by using the electric hoist 14 to carry out formwork installation construction.
As in fig. 11, step seven: after the reinforcing steel bars and the templates are installed, the constructors finish concrete pouring work on the truss steel platform 1 and the hanging scaffold, and repair the reserved grooves 9 of the pier studs 10. And finishing an integral construction process.
The utility model discloses walking jacking die carrier when the template turns over the mould, through stretching out of jacking cylinder 5 and the alternative jacking of back-up beam 4 and under bracing roof beam 6 in the withdrawal control, can realize the promotion of turning over mould and operation platform, need not tower crane or crane cooperation, can effectively reduce construction equipment cost and drop into. The practical construction effect verifies that the formwork is used for circulating for 24-32 hours once, the casting height is 4m each time, and compared with the traditional process, the formwork has the advantages of high construction efficiency, low safety risk, guaranteed quality, high overall stability, low additional consumption and the like.
As shown in the following table 1, the utility model discloses construction process contrast such as walking jacking die carrier rollover and traditional rollover, slipform, hydraulic climbing formwork and ordinary hydraulic jacking die carrier rollover has higher comprehensive advantage.
TABLE 1 comparative analysis table for different construction techniques
Through the contrast with construction technology such as traditional turnover formwork, slipform, hydraulic pressure creeping formwork and ordinary hydraulic pressure jacking die carrier turnover formwork, the utility model discloses walking jacking die carrier has that construction efficiency is high, the safe risk is low, the quality is secure, overall stability is high and extra consumption low grade advantage.
Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that various modifications and substitutions can be made thereto without departing from the spirit and scope of the present invention as set forth in the appended claims.