CN115637657A - Construction method for side-span cast-in-place section and side-span closure section of suspension casting continuous beam by using hanging basket construction - Google Patents
Construction method for side-span cast-in-place section and side-span closure section of suspension casting continuous beam by using hanging basket construction Download PDFInfo
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Abstract
The invention relates to a construction method for constructing a side span cast-in-place section and a side span closure section of a suspension casting continuous beam by using a hanging basket, wherein the hanging basket and a side pier are adopted to form a stress fulcrum, an operation platform is provided for the construction of the side span cast-in-place section and the closure section, the firm support of a whole supporting system and the normal operation of a suspension system are ensured, the processes of pre-embedding, installing, pre-pressing, dismantling and the like of a support or a bracket are omitted, the construction process is simple and easy to operate, the hanging basket is directly moved forwards to provide a stable and wide construction platform for construction operation, the processes of installing the support, pre-embedding and installing the bracket, pre-pressing and dismantling the support and the like are avoided, the construction work efficiency is effectively improved, the cost investment of steel, templates, manpower and machinery for the support system is greatly reduced, and the high-altitude operation strength and safety risk are reduced to the utmost extent.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a construction method of a side span cast-in-place section and a side span closure section of a suspension continuous beam by adopting hanging basket construction.
Background
The continuous beam is used as a statically indeterminate structure, has the characteristics of large span, uniform bending moment distribution, small mid-span deflection, good anti-seismic performance and the like, has great advantages on line crossing and river valley crossing, and is more and more widely applied to the hanging basket cantilever pouring process.
When the pier body is relatively short and the terrain is relatively flat, the side span cast-in-place section construction is usually carried out by adopting a bracket for cast-in-place construction, but the steel consumption is generally large. When the pier height is relatively high and the requirement on the terrain is high, the side span cast-in-place section is cast-in-place by adopting a bracket, and the side span closure section is cast-in-place by adopting a hanging basket as a support.
The side span cast-in-place section adopts a bracket for cast-in-place construction, and the steel consumption is generally large; when the bracket is adopted for cast-in-place construction, the accuracy of the embedded positions of the upper embedded part and the lower embedded part erected by the bracket is not easy to control, the aerial work is greatly influenced by air flow and the instability of the work space, the welding quality of the rod piece and the balance degree of the bracket are difficult to guarantee, and meanwhile, the worker faces greater safety risks in work.
Disclosure of Invention
In view of the above, the invention aims to provide a construction method for a side-span cast-in-place section and a side-span closure section of a suspended continuous beam by using hanging basket construction, which effectively solves the problems of high construction cost and poor stability in the existing field construction by using a support or a bracket.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a construction method for constructing a side span cast-in-place section and a side span closure section of a suspension continuous beam by using a hanging basket comprises the following steps:
step one, constructing the cantilever beam until the construction of the outermost end of the cantilever beam is finished
Constructing a cantilever beam, namely anchoring the cradle base on the previous cantilever beam on the basis of the previous cantilever beam, extending out of the front end of the cradle cantilever beam and forming an operation platform; the front ends of the inner sliding beam and the outer sliding beam are fixed on the cantilever beam through a front suspension rod, the rear ends of the inner sliding beam and the outer sliding beam are suspended on the hanging basket through a rear suspension rod, the inner template and the outer template are correspondingly arranged on the inner sliding beam and the outer sliding beam in a sliding mode, and the cantilever beam is constructed section by section along with movement until the construction of the last section of the cantilever beam is finished;
step two, dismantling the hanging basket operation platform
Firstly, removing a hanging basket anchoring base and a front suspender, drilling a hole at the rear end of the last section of cantilever beam, fixing the removed front suspender in the drilled hole, and then sleeving a fixing ring at the lower part of the front suspender on an inner sliding beam and an outer sliding beam to enable the fixing ring to serve as a temporary supporting and hanging point;
step three, the hanging basket moves forwards
The hanging basket moves forwards, the inner sliding beam, the outer sliding beam and the operation platform move forwards under the traction of the rear suspension rod, the operation platform walks to the top end of the side span cast-in-place section pier, then the rear end of the operation platform is arranged on the top of the pier and is arranged on a leveling base according to the elevation, leveling is carried out, the suspension rod used for suspending the front end of the operation platform is removed, at the moment, the inner sliding beam and the outer sliding beam move in place, and a fixing ring at the lower part of the front suspension rod is fastened;
step four, counterweight construction
In order to keep the basic balance of the T-shaped structure, construction of a side span cast-in-place section and a closure section is carried out on the premise of keeping the basic balance of the T-shaped structure, equal loading weight is carried out on a cantilever section close to the closure side of a mid-span while concrete is poured, the required counterweight weight is obtained according to a moment balance formula, and the stress balance of two ends of the T-shaped structure is ensured;
step five, paving an inner mold and an outer mold
Laying a bottom die by matching square wood with a bamboo plywood, laying a side die by using a shaping steel die for a side die, binding the bottom die and a wall body reinforcing steel bar and pre-stressing a pipeline, assembling an inner die after the installation is finished, assembling the inner die by using the bamboo plywood, and using an inner support to support the square wood; the method comprises the following steps of (1) sticking a wide-face transparent adhesive tape at the abutted seam of a template, adding square timber reinforcing supports at the abutted seam, then carrying out prestressed installation construction on a top plate steel bar and a top plate, then pouring concrete, carrying out prestressed tensioning, grouting and anchor sealing construction after the concrete has the elastic modulus and the strength reaching 100% of the design after curing, and completing construction of a side-span cast-in-place section;
step six
Removing the inner support, operating the front suspender and the rear suspender to lower the inner template and the outer template, moving the inner template and the outer template forwards to perform the next construction, and repeating the step five;
step seven, dismantling the hanging basket
And (3) dismantling the hanging basket base, the front suspender and the rear suspender, then dismantling the inner support, the inner sliding beam and the outer sliding beam, and finally dismantling the inner template and the outer template.
Furthermore, the inner support comprises a sliding rod, a sliding sleeve, a telescopic rod and a tightening head; the sliding sleeve is matched and sleeved on the sliding rod, a plurality of telescopic rods are arranged on the outer side of the sliding sleeve, the tail ends of the telescopic rods are provided with jacking heads, and two ends of the sliding rod are fixed on the cantilever beam and the hanging basket respectively through hanging rods.
Furthermore, the sliding rod and the sliding sleeve are of square matching structures, a plurality of fixing holes are formed in the sliding rod at intervals, fixing pins are arranged on the sliding sleeve, the fixing pins are sleeved in the fixing holes in a matched mode, and the sliding rod and the sliding sleeve are locked.
Further, the puller head includes footstock, auxiliary wheel and spring, the rear end of footstock is fixed at the tip of telescopic link, and the front end both sides of footstock are provided with the curb plate, form the race between the curb plate, the lateral wall of curb plate is provided with the flat hole, the outside in flat hole is provided with the slider, and the spring setting is between slider and flat hole bottom, the auxiliary wheel rotates and sets up on the slider, the footstock effort is given to the telescopic link, makes the spring compression, and the footstock top is leaned on the centre form, and under this state, the auxiliary wheel is hidden at the race.
Furthermore, the telescopic link includes central sleeve and fixed loop bar, central telescopic both ends are provided with reverse screw thread, and the threaded connection of two fixed loop bar adaptations is at central telescopic both ends.
Furthermore, in the fifth step to the sixth step, along with the construction of the side span cast-in-place section and the side span closure section, a reinforcing rod is constructed between the bottom of the constructed part and the working platform.
The beneficial effects of the above technical scheme are: according to the invention, one end of the cradle is anchored on the cantilever beam, the other end of the cradle extends forwards and is placed on the side pier, and the leveling base is utilized for leveling, so that the support of the cradle is simplified, meanwhile, the cast-in-place section and the closure section are integrally constructed, the cost is saved, the construction period is shortened, a bracket is prevented from being arranged on the side pier, and the construction efficiency is improved.
The outer template, the inner template and the inner support can all realize sliding, and in a specific implementation mode, the front suspender and the rear suspender are adopted to arrange the outer sliding beam and the inner sliding beam and respectively realize the support, the downward placement and the sliding of the outer template and the inner template; through arranging the slide bar system, fix the outer end of slide bar on hanging the basket, the inner is fixed on the cantilever beam, and use fixed slide bar as the basis, arrange the sliding sleeve and support the telescopic link, realize the support to the interior template, utilize telescopic link structure can remove the support simultaneously, during the implementation, can arrange the telescopic auxiliary wheel on the footstock, whole support can contact interior template or construction platform in the restriction back of temporary contact promptly, slow down the effort to the slide bar, so that remove.
The invention adopts the hanging basket and the side pier to form a stressed pivot, provides an operation platform for the construction side span cast-in-place section and the closure section, ensures that the whole supporting system has firm supporting and the suspension system works normally, saves the procedures of pre-embedding, installing, pre-pressing, dismantling and the like of a bracket or a bracket, has simple construction process and easy operation, directly utilizes the forward movement of the hanging basket to provide a stable and wide construction platform for the construction operation, avoids the procedures of bracket installation, bracket pre-embedding and installation, bracket pre-pressing, dismantling and the like, effectively improves the construction efficiency, greatly reduces the steel consumption of the supporting system, the cost investment of templates, manpower and machinery, and reduces the intensity and the safety risk of the overhead operation to the maximum extent.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure I-I in FIG. 1;
FIG. 3 is a schematic view of the structure II-II in FIG. 1;
fig. 4 is a schematic view of a support structure of the inner frame;
FIG. 5 is a schematic structural view of the telescopic rod and the tightening head;
FIG. 6 is a schematic structural view of the tightening head;
FIG. 7 is a construction flow chart of the present invention.
Reference numerals: the suspended basket comprises a base 1, a suspended basket main truss 2, a rear suspension rod 3, a cast-in-place section 4, a side pier 5, a bottom longitudinal beam 6, a rear joist 7, an outer sliding beam 8, a closure section 9, an inner sliding beam 10, a suspended basket side mold 11, a leveling base 12, an outer template 13, an inner support 14, a sliding rod 15, a sliding sleeve 16, a fixed loop bar 17, a central sleeve 18, a jacking head 19, a top seat 191, a side plate 192, a flat hole 193, a sliding block 194, a spring 195, an auxiliary wheel 196 and a suspension rod 20.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
the method is mainly used for safely and efficiently constructing the side span cast-in-place section and the side span closure section in the construction of the suspended continuous beam in the bridge engineering; to generally need to arrange the support on the side pier in current construction, cast-in-place section and closure section need separately be under construction, and the efficiency of construction is low, and based on this, this embodiment uses the basket as construction foundation, arranges the basket on last section cantilever beam, makes the cantilever of basket reach forward and sit on the side pier, realizes cast-in-place section and closure section's integrative construction.
Structurally, as shown in fig. 1, the cradle is in a parallelogram structure, a base 1 at the bottom of the cradle is anchored on a cantilever beam through an anchoring rod, and the cradle is provided with a vertical beam, two parallel main trusses 2 of the cradle and a horizontal top beam; the top beam is provided with a suspension rod, the upper part of the suspension rod is provided with a jack, the lower part of the suspension rod or the lifting can be realized, the bottom of the suspension rod is provided with a bottom longitudinal beam 6 and a rear joist 7, and the bottom longitudinal beam 6 and the rear joist 7 form a working platform.
In fig. 1, a11 and a12 are shown as cantilever beams, a13 and a closing section 9, a14 is a cast-in-place section 4, after a11 is poured, a12 is constructed, a12 is a last section of cantilever beam, a cradle base 1 is anchored on a12, a hole is drilled on a12, the rear ends of an inner sliding beam system and an outer sliding beam system are arranged on a12 through a front suspension rod, the front ends are suspended on a cradle through a rear suspension rod 4, the implementation is carried out, wherein the suspension rod of the inner sliding beam system is arranged in the middle, and the suspension rod of the outer sliding beam system is arranged at the flange of a box girder; the inner template and the outer template are arranged on the inner sliding beam system and the outer sliding beam system in a corresponding sliding mode, and can be lifted or lowered under the action of the hanger rods, so that the templates can be separated from a casting body conveniently, and then the templates can move horizontally along the corresponding sliding beam systems.
In specific implementation, the embodiment provides a construction method for constructing a side-span cast-in-place section and a side-span closure section of a suspension continuous beam by using a hanging basket, and the construction method comprises the following steps:
step one, constructing the cantilever beam until the construction of the outermost end of the cantilever beam is finished
Constructing a cantilever beam, namely anchoring the cradle base on the previous cantilever beam on the basis of the previous cantilever beam, extending out of the front end of the cradle cantilever beam and forming an operation platform; the front ends of the inner sliding beam and the outer sliding beam are fixed on the cantilever beam through a front suspension rod, the rear ends of the inner sliding beam and the outer sliding beam are suspended on the hanging basket through a rear suspension rod, the inner template and the outer template are correspondingly arranged on the inner sliding beam and the outer sliding beam in a sliding mode, and the cantilever beam is constructed section by section along with movement until the construction of the last section of the cantilever beam is finished;
step two, dismantling the hanging basket operation platform
Firstly, removing a hanging basket anchoring base 1 and a front suspender, drilling a hole at the rear end of the last section of cantilever beam, fixing the removed front suspender in the drilled hole, and then sleeving a fixing ring at the lower part of the front suspender on an inner sliding beam 10 and an outer sliding beam 8 to enable the fixing ring to be used as a temporary supporting and hanging point;
step three, the hanging basket moves forwards
The hanging basket is moved forwards, the inner sliding beam 10, the outer sliding beam 8 and the operation platform are moved forwards under the traction of the rear suspension rod, the operation platform travels to the top end of a side span cast-in-place section pier, then the rear end of the operation platform is arranged on the top of the pier and is arranged on a leveling base 12 according to the elevation, leveling is carried out, the suspension rod used for suspending the front end of the operation platform is removed, at the moment, the inner sliding beam and the outer sliding beam move in place, and a fixing ring at the lower part of the front suspension rod is fastened; the concrete structure of the leveling base can be that the cradle is moved to the top end of a side span cast-in-place section pier, the bottom longitudinal beam is arranged on a section steel support pad material arranged on the top of the pier according to the elevation, the bottom longitudinal beam is transversely limited by adopting a steel bar or a steel plate, a layer of thin steel plate is laid between the cradle bottom longitudinal beam and the section steel support pad material, and the top surface of the steel plate is coated with a layer of lubricating oil so as to ensure that a beam body can freely stretch out and draw back along the longitudinal bridge under the condition of temperature stress. And (4) dismantling the inner guide beam of the cradle and removing the front long suspender of the inner guide beam.
Step four, counterweight construction
In order to keep the basic balance of the T-shaped structure, construction of a side span cast-in-place section and a closure section is carried out, equal loading weight is carried out on a cantilever section close to the closure side of a mid span while concrete is poured, the required counterweight weight is obtained according to a moment balance formula, and the stress balance of two ends of the T-shaped structure is ensured;
step five, paving an inner mold and an outer mold
The bottom die of the pier top section is paved by matching square wood with a bamboo plywood with the thickness of 1.5 cm; the side mould adopts a shaping steel mould; the internal mold is assembled after the binding of the steel bars of the bottom plate and the wall body and the installation of the prestressed pipeline are finished, the internal mold is assembled by adopting bamboo plywood, square wood is stupefied and supported by adopting phi 48 multiplied by 3.5mm scaffold pipes, the longitudinal distance, the transverse distance and the step distance are all 0.6 m, and each row of the internal mold is provided with longitudinal and transverse horizontal supports so as to enhance the overall stability of the support. And wide-surface transparent adhesive tapes are adhered to the joints of the templates, and square wood reinforcing supports are added to the joints. And then carrying out roof steel bar and roof prestress installation construction, and pouring concrete. And (5) curing and the like until the elastic modulus and the strength of the concrete reach 100% of the designed elastic modulus and strength, and then performing prestress tensioning, grouting and anchor sealing construction to complete the construction of the side-span cast-in-place section.
The inner support structure is solitary telescopic rod structure in this embodiment, and it can be single to horizontal and vertical supporting, specific to the single body of rod, and it includes the body of rod and flexible head, and flexible regulation is realized on the body of rod to the one end threaded connection of flexible head, and its another tip is provided with the top for with the inner formword contact, this kind of structure need be demolishd one by one when using, then strut one by one.
Step six
Removing the inner support, operating the front suspender and the rear suspender to lower the inner template and the outer template, moving the inner template and the outer template forwards to perform the next construction, and repeating the step five; along with the construction of the side span cast-in-place section and the side span closure section, a reinforcing rod is constructed between the bottom of the constructed part and the working platform.
Step seven, dismantling the hanging basket
And (3) removing the hanging basket base, the front suspender and the rear suspender, then removing the inner support, the inner sliding beam and the outer sliding beam, and finally removing the inner template and the outer template.
The invention discloses a construction process for constructing a side span cast-in-place section and a side span closure section by using a hanging basket, taking a continuous beam of a certain railway (54 +100+ 54) m as an example, wherein the side span closure section of the continuous beam is 2.0m long, the side span cast-in-place section is 3.75m long, the outer part of a pier body adopts the hanging basket as a construction support, an outer mold and a bottom mold are constructed by adopting hanging basket templates, a pier top section is constructed by assembling and assembling shaped steel molds, the side span cast-in-place section and the closure section are cast and formed at one time, and a counterweight is arranged at a cantilever end close to the closure side during casting.
The invention is applicable to: (1) continuous beam without edge span closure section: the length of the part of the side span straight line section, which is hung out of the pier body, does not exceed the maximum length of a hanging basket hanging casting section (generally 4.0 m); (2) continuous beam with side span closure section: the length of the part of the side span straight-line section and the side span closure section which is suspended out of the pier body does not exceed the maximum block length (generally 4.0 m) of the suspended casting section of the suspension basket; (3) The weight of the beam section of the suspended pier body part born by the cradle is not more than the weight of the maximum cast-in-place section adopted by the cradle design theoretical calculation; (4) For a continuous beam with a closure flow of first side and second side, in order to ensure that two ends of a T-shaped structure are balanced, a hanging basket is adopted as a support to construct a side span straight line segment, and a counterweight needs to be considered.
Therefore, the invention adopts the hanging basket and the side pier to form a stress pivot, provides an operation platform for the construction side span cast-in-place section and the closure section, realizes the integrated construction of the cast-in-place section and the closure section, ensures the firm supporting of the whole supporting system and the normal operation of the suspension system, saves the procedures of pre-embedding, installing, pre-pressing, dismantling and the like of the bracket or the bracket, has simple construction process and easy operation, directly utilizes the hanging basket to move forwards to provide a stable and wide construction platform for the construction operation, avoids the procedures of bracket installation, pre-embedding and installing of the bracket, bracket pre-pressing, dismantling and the like, effectively improves the construction efficiency, greatly reduces the cost investment of steel consumption, templates, manpower and machinery for the supporting system, and furthest reduces the intensity and the safety risk of high-altitude operation.
Example 2: this embodiment is substantially the same as embodiment 1, except that the structure of the inner holder is further described in this embodiment.
This embodiment is further illustrated with respect to the direct structure in the implementation as shown in FIGS. 4-6; the inner support comprises a sliding rod 15, a sliding sleeve 16, a telescopic rod and a puller head 19; the sliding sleeve 16 is sleeved on the sliding rod 15 in a matching mode, a plurality of telescopic rods are arranged on the outer side of the sliding sleeve 16, the tail ends of the telescopic rods are provided with jacking heads 19, and two ends of the sliding rod 15 are respectively fixed on the cantilever beam and the hanging basket through hanging rods 20.
The sliding rod 15 and the sliding sleeve 16 are of a square matching structure, a plurality of fixing holes are formed in the sliding rod 15 at intervals, fixing pins are arranged on the sliding sleeve, and the fixing pins are sleeved in the fixing holes in a matching mode to lock the positions of the sliding rod 15 and the sliding sleeve 16; the puller head 19 comprises a top seat 191, an auxiliary wheel 196 and a spring 195, the rear end of the top seat 191 is fixed at the end part of the telescopic rod, side plates 192 are arranged on two sides of the front end of the top seat 191, a wheel groove is formed between the side plates 192, a flat hole 193 is arranged on the side wall of each side plate 192, a sliding block 194 is arranged on the outer side of each flat hole 193, the spring 195 is arranged between the sliding block 194 and the bottom of each flat hole 193, the auxiliary wheel 196 is rotatably arranged on the sliding block, the telescopic rod applies force to the top seat to compress the spring, the top seat is abutted against the inner mold, and in the state, the auxiliary wheel is hidden in the wheel groove; the telescopic link includes central sleeve 18 and fixed loop bar 17, and the both ends of central sleeve 18 are provided with reverse screw, and the threaded connection of two fixed loop bar 17 adaptations is at the telescopic both ends of center.
In the embodiment, the outer template, the inner template and the inner support can slide, and in a specific implementation mode, a front suspender and a rear suspender are adopted to arrange an outer sliding beam and an inner sliding beam and respectively realize the support, the downward placement and the sliding of the outer template and the inner template; through arranging the slide bar system, fix the outer end of slide bar on hanging the basket, the inner is fixed on the cantilever beam, and use fixed slide bar as the basis, arrange the sliding sleeve and support the telescopic link, realize the support to the interior template, utilize telescopic link structure can remove the support simultaneously, during the implementation, can arrange the telescopic auxiliary wheel on the footstock, whole support can contact interior template or construction platform in the restriction back of temporary contact promptly, slow down the effort to the slide bar, so that remove.
Claims (6)
1. A construction method for constructing a side span cast-in-place section and a side span closure section of a suspension casting continuous beam by adopting a hanging basket is characterized by comprising the following steps:
step one, constructing the cantilever beam until the construction of the outermost end of the cantilever beam is finished
Constructing a cantilever beam, namely anchoring the cradle base on the previous cantilever beam on the basis of the previous cantilever beam, extending out of the front end of the cradle cantilever beam and forming an operation platform; the front ends of the inner sliding beam and the outer sliding beam are fixed on the cantilever beam through a front suspension rod, the rear ends of the inner sliding beam and the outer sliding beam are hung on the hanging basket through a rear suspension rod, the inner template and the outer template are correspondingly arranged on the inner sliding beam and the outer sliding beam in a sliding mode, and the cantilever beam is constructed section by section along with movement until the construction of the final section of the cantilever beam is finished;
step two, dismantling the hanging basket operation platform
Firstly, removing a hanging basket anchoring base and a front suspender, drilling a hole at the rear end of the last section of cantilever beam, fixing the removed front suspender in the drilled hole, and then sleeving a fixing ring at the lower part of the front suspender on an inner sliding beam and an outer sliding beam to enable the fixing ring to serve as a temporary supporting and hanging point;
step three, the hanging basket moves forwards
The hanging basket moves forwards, the inner sliding beam, the outer sliding beam and the operation platform move forwards under the traction of the rear suspension rod, the operation platform walks to the top end of the side span cast-in-place section pier, then the rear end of the operation platform is arranged on the top of the pier and is arranged on a leveling base according to the elevation, leveling is carried out, the suspension rod used for suspending the front end of the operation platform is removed, at the moment, the inner sliding beam and the outer sliding beam move in place, and a fixing ring at the lower part of the front suspension rod is fastened;
step four, counterweight construction
In order to keep the basic balance of the T-shaped structure, construction of a side span cast-in-place section and a closure section is carried out on the premise of keeping the basic balance of the T-shaped structure, equal loading weight is carried out on a cantilever section close to the closure side of a mid-span while concrete is poured, the required counterweight weight is obtained according to a moment balance formula, and the stress balance of two ends of the T-shaped structure is ensured;
step five, paving an internal mold and an external mold
Laying a bottom die by matching square wood with a bamboo plywood, laying a side die by using a shaping steel die for a side die, binding the bottom die and a wall body reinforcing steel bar and pre-stressing a pipeline, assembling an inner die after the installation is finished, assembling the inner die by using the bamboo plywood, and using an inner support to support the square wood; the method comprises the following steps of (1) sticking a wide-face transparent adhesive tape at the abutted seam of a template, adding square timber reinforcing supports at the abutted seam, then carrying out prestressed installation construction on a top plate steel bar and a top plate, then pouring concrete, carrying out prestressed tensioning, grouting and anchor sealing construction after the concrete has the elastic modulus and the strength reaching 100% of the design after curing, and completing construction of a side-span cast-in-place section;
step six
Removing the inner support, operating the front suspender and the rear suspender to lower the inner template and the outer template, moving the inner template and the outer template forwards to perform the next construction, and repeating the step five;
step seven, dismantling the hanging basket
And (3) dismantling the hanging basket base, the front suspender and the rear suspender, then dismantling the inner support, the inner sliding beam and the outer sliding beam, and finally dismantling the inner template and the outer template.
2. The construction method of the side span cast-in-place section and the side span closure section of the suspended continuous beam constructed by the hanging basket according to claim 1 is characterized in that: the inner support comprises a sliding rod, a sliding sleeve, a telescopic rod and a jacking head; the sliding sleeve is sleeved on the sliding rod in a matching mode, a plurality of telescopic rods are arranged on the outer side of the sliding sleeve, jacking heads are arranged at the tail ends of the telescopic rods, and two ends of the sliding rod are fixed on the cantilever beam and the hanging basket respectively through hanging rods.
3. The construction method of the side span cast-in-place section and the side span closure section of the suspended continuous beam constructed by the hanging baskets according to claim 2 is characterized in that: the sliding rod and the sliding sleeve are of square matching structures, a plurality of fixing holes are formed in the sliding rod at intervals, fixing pins are arranged on the sliding sleeve and matched with the fixing holes in a sleeved mode, and the sliding rod and the sliding sleeve are locked.
4. The construction method of the side span cast-in-place section and the side span closure section of the suspended continuous beam constructed by the hanging baskets according to claim 2 is characterized in that: the puller head comprises a top seat, an auxiliary wheel and a spring, the rear end of the top seat is fixed at the end part of the telescopic rod, side plates are arranged on two sides of the front end of the top seat, a wheel groove is formed between the side plates, a flat hole is formed in the side wall of each side plate, a sliding block is arranged on the outer side of the flat hole, the spring is arranged between the sliding block and the bottom of the flat hole, the auxiliary wheel is rotatably arranged on the sliding block, the telescopic rod applies force to the top seat to compress the spring, the top seat is abutted against the inner die, and under the state, the auxiliary wheel is hidden in the wheel groove.
5. The construction method of the side span cast-in-place section and the side span closure section of the suspended continuous beam constructed by the hanging baskets according to any one of claims 2 to 4, is characterized in that: the telescopic link includes central sleeve and fixed loop bar, central telescopic both ends are provided with reverse screw, the threaded connection of two fixed loop bar adaptations at central telescopic both ends.
6. The construction method of the side span cast-in-place section and the side span closure section of the suspended continuous beam constructed by the hanging baskets according to claim 1 is characterized in that: in the fifth step to the sixth step, along with the construction of the side span cast-in-place section and the side span closure section, a reinforcing rod is constructed between the bottom of the constructed part and the working platform.
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| CN202211211432.8A CN115637657A (en) | 2022-09-30 | 2022-09-30 | Construction method for side-span cast-in-place section and side-span closure section of suspension casting continuous beam by using hanging basket construction |
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| CN202211211432.8A CN115637657A (en) | 2022-09-30 | 2022-09-30 | Construction method for side-span cast-in-place section and side-span closure section of suspension casting continuous beam by using hanging basket construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117166376A (en) * | 2023-11-02 | 2023-12-05 | 中铁十六局集团路桥工程有限公司 | Lightweight construction method for side span cast-in-situ frame body of high mountain gorge Gu Ou continuous beam |
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2022
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117166376A (en) * | 2023-11-02 | 2023-12-05 | 中铁十六局集团路桥工程有限公司 | Lightweight construction method for side span cast-in-situ frame body of high mountain gorge Gu Ou continuous beam |
| CN117166376B (en) * | 2023-11-02 | 2024-02-20 | 中铁十六局集团路桥工程有限公司 | Lightweight construction method for side span cast-in-situ frame body of high mountain gorge Gu Ou continuous beam |
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