CN111749140B - A truss integral lifting bridge high pier climbing formwork device and construction method - Google Patents
A truss integral lifting bridge high pier climbing formwork device and construction method Download PDFInfo
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- CN111749140B CN111749140B CN202010714107.8A CN202010714107A CN111749140B CN 111749140 B CN111749140 B CN 111749140B CN 202010714107 A CN202010714107 A CN 202010714107A CN 111749140 B CN111749140 B CN 111749140B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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Abstract
A climbing formwork device for a high pier of a girder integrally lifted bridge comprises climbing rails arranged on four pre-buried climbing rail fixing pieces on rectangular corners of a bridge pier, wherein a top truss operation platform is arranged at the upper end of each climbing rail, climbing rail anchor bolts are arranged at the lower end of each climbing rail, an outer formwork is arranged between two adjacent climbing rails in the circumferential direction, an inner formwork is arranged on the inner side of each outer formwork, an outer truss operation platform is arranged on the outer side of each climbing rail, a hydraulic lifting mechanism is arranged between each outer truss operation platform and each climbing rail, the outer truss operation platform is connected with the top truss operation platform through a first hydraulic lifting mechanism, an inner truss operation platform is arranged on the inner side of each inner formwork, the inner truss operation platform is connected with the top truss operation platform through a second hydraulic lifting mechanism, the construction method comprises the steps of installing the climbing rails and the top truss operation platform, lifting the outer formwork and the truss operation platform, pouring pier body solid transition section concrete, installing the inner formwork and the inner truss operation platform, bridge pier body standard sections are constructed, and the whole set of structure is removed.
Description
Technical Field
The invention belongs to the technical field of pouring piers, and particularly relates to a truss integral lifting type high pier climbing formwork system and a construction method.
Background
The highway network main line of the present country has been already finished, the highway branch line of the better district, tie line have also been already constructed, the highway will be in the mountain area branch line, tie line later on in the construction, the highway construction of the great northwest mountain area highway is mainly extended to the mountain area gradually, there the dangerous situation is in the place, the topography is mostly the deep ditch, abrupt slope, the great span of the high pier is in the highway construction of mountain area because of its own superiority extensively, in the highway construction of the project construction facility of the highway later on, the construction of the high pier will be the problem that we will face frequently later on.
The conventional high pier construction method comprises a turnover formwork construction method, a sliding formwork construction method and a climbing formwork construction method. The die turning construction method has the advantages of more high-altitude hoisting operation, uncontrollable potential safety hazard, slow construction progress and long construction duration, and ensures that the supporting equipment and management have high duration cost and low economic benefit. The sliding mode construction method has good safety in the construction process, but the sliding mode system is dismantled at high altitude, so that the potential safety hazard is large, and the quality of the product is the heaviest to control. The common climbing formwork construction method needs each formwork to climb separately, is large in safety risk, multiple in repeated procedures and long in working time, the climbing formwork system is removed at high altitude after construction is finished, potential safety hazards are large, meanwhile, the common climbing formwork uses wood formwork panels, and is multiple in opposite-pulling screw holes, the appearance quality of products is affected, but the overall work efficiency is low, supporting equipment is enabled, the management duration cost is high, and the overall economic benefit is low.
The safety is used as the highest red line management at present in the construction process, and especially for the event which is likely to cause group death injury, the safety is ensured from the intrinsic safety of the technology and the scheme reliability. The conventional high pier construction method has larger potential safety hazard and uncontrollable safety risk, and a set of high pier construction method and device with safety, reliability and high construction efficiency are urgently needed at present.
Disclosure of Invention
The invention aims to overcome the defects of the existing high pier construction method and device and provide the truss integral lifting type bridge high pier climbing formwork device which is high in construction efficiency, safe, reliable, high in pier quality and high in economic benefit.
The technical scheme includes that four climbing rails are arranged on four pre-buried climbing rail fixing pieces on four corners of a rectangular bridge pier, a top truss operation platform is arranged at the upper end of each climbing rail, climbing rail anchor bolts are arranged at the lower end of each climbing rail, an outer formwork is arranged between two adjacent climbing rails in the circumferential direction, an inner formwork is arranged on the inner side of each outer formwork, the outer formwork is connected with the inner formwork through an inner formwork counter pull rod, an outer truss operation platform fixedly connected with the outer formwork is arranged on the outer side of each climbing rail, a hydraulic jacking mechanism is arranged between each outer truss operation platform and each climbing rail, each outer truss operation platform is connected with the top truss operation platform through an outer truss hanging rod and a first hydraulic lifting mechanism, an inner truss operation platform fixedly connected with the inner formwork is arranged on the inner side of each inner formwork, and each inner truss operation platform is connected with the top truss operation platform through an inner truss hanging rod and a second hydraulic lifting mechanism.
As a preferable technical scheme, the hydraulic lifting mechanism comprises a lifting jack, a first fulcrum automatic conversion self-locking mechanism and a second fulcrum automatic conversion self-locking mechanism, wherein the base of the lifting jack and the second fulcrum automatic conversion self-locking mechanism are arranged on an outer die truss operating platform, the second fulcrum automatic conversion self-locking mechanism is positioned below the lifting jack, the power end of the lifting jack is provided with the first fulcrum automatic conversion self-locking mechanism, and the first fulcrum automatic conversion self-locking mechanism and the second fulcrum automatic conversion self-locking mechanism are both positioned in a track groove of a climbing rail.
As a preferable technical scheme, the first fulcrum automatic conversion self-locking mechanism is characterized in that one ends of two rigid clamping plates are hinged, springs are arranged between the other ends of the two rigid clamping plates, clamping blocks distributed at equal intervals are arranged in the track groove of the climbing rail, the distance between two adjacent clamping blocks is smaller than or equal to the stroke of the jacking jack, through grooves are processed in the middle of the clamping blocks, the distance between the upper ends of the two clamping plates in a natural shrinkage state of the springs is greater than the width of the through grooves, and the distance between the upper ends of the two clamping plates in a state of the minimum length is greater than the distance between the springs in a compression state of the springs, and the second fulcrum automatic conversion self-locking mechanism and the first fulcrum automatic conversion self-locking mechanism are identical in structure.
The first hydraulic lifting mechanism is characterized in that a first penetrating jack is arranged on a first lifting boom, the upper end of the first lifting boom is fixedly arranged on a top truss operation platform, the lower end of the first lifting boom is fixedly arranged on the inner side of an outer truss operation platform, a base of the first penetrating jack is fixedly arranged on the outer truss operation platform, a second penetrating jack is arranged on a second lifting boom, the upper end of the second lifting boom is fixedly arranged on the top truss operation platform, the lower end of the second lifting boom is fixedly arranged on an inner truss operation platform, and a base of the second penetrating jack is fixedly arranged on the inner truss operation platform.
As an optimized technical scheme, the outer die truss operating platform is provided with elastic rollers, and the elastic rollers are located between the outer die truss operating platform and the climbing rail.
As an optimized technical scheme, the climbing rail is of a steel box girder structure, and the length of the climbing rail is longer than the construction length of the high pier body sections of the three-section bridge.
The invention also provides a construction method of the truss integral lifting type bridge high pier climbing formwork device, which comprises the following steps:
S1, mounting climbing rail
Four climbing rails are respectively and fixedly arranged on a climbing rail fixing assembly pre-buried on a bridge pier, so that the verticality of the climbing rails is ensured, and after the climbing rails are arranged, three temporary wind-collecting ropes are pulled by each climbing rail;
s2, installing a top truss operation platform and a head section pier body steel bar
After the top truss operation platform is assembled on the ground, the top truss operation platform is integrally hoisted on the climbing rail to the top through hoisting equipment and fixed, and then the first section pier body vertical steel bars and the horizontal steel bars are installed on the embedded steel bars on the bridge pier;
S3, lifting the outer template and the outer mold truss operation platform and pouring pier body solid transition section concrete
A. after the concrete reaches the form removal strength, removing the outer form for demoulding, installing a first lifting boom and a first penetrating jack, and integrally improving the height of a concrete pouring section through the outer form and the outer form truss operation platform by the first lifting boom and the first penetrating jack;
b. after the outer template and the outer mold truss operation platform are lifted to a specified height, fixing the outer template on a climbing rail, installing an outer mold truss suspender, removing a first lifting suspender and a first penetrating jack, and pouring pier body solid transition section concrete;
S4, climbing rail and jacking
A. The strength of the newly poured concrete is larger than 7.5Mpa, and the external mold truss suspenders, the anchor bolts of the climbing rail and the concrete pier surface and the threaded connectors between the climbing rail and the external mold plate are sequentially removed;
b. the whole outer template and the outer die truss operation platform are used as fixed supporting stress points, the climbing rail and the top truss operation platform are lifted to a designated height through the jacking jack in a repeated continuous mode, and then the rail is fixed on the concrete pier through the climbing rail anchoring bolts;
c. installing a first lifting boom and a first penetrating jack, lifting the outer die plate and the outer die truss operating platform as a whole through the first penetrating jack once in place, fixing the outer die plate on a climbing rail, installing the outer die truss boom, and removing the first lifting boom and the first penetrating jack;
s5, installing an inner template and an inner mould truss operation platform;
Hoisting the inner template at a specified height through hoisting equipment, fixedly connecting the inner template with the outer template through an inner die and outer die opposite pull rod, hoisting the inner die truss operating platform at the specified height through hoisting equipment, fixedly connecting the inner die truss operating platform with the inner template, and fixedly connecting the inner die truss operating platform with the top truss operating platform through an inner die truss suspender;
s6, construction of standard sections of bridge pier body
A. after concrete is poured between the inner template and the outer template, installing upper section steel bars, and dismantling threaded connecting pieces between the inner mould truss suspender, the outer template and the climbing rail, wherein the strength of the concrete is higher than 7.5 Mpa;
b. the whole outer template and the outer die truss operation platform are used as fixed supporting stress points, the climbing rail and the top truss operation platform are lifted to a designated height through the jacking jack in a repeated continuous mode, and then the rail is fixed on the concrete pier through the climbing rail anchoring bolts;
c. The first lifting boom, the first penetrating jack, the second lifting boom and the second penetrating jack are installed, the outer die plate and the inner die plate are removed for demoulding, and the outer die plate and the outer die truss operating platform are lifted in place through the first penetrating jack once as a whole;
d. Fixing an outer template on a climbing rail, installing an outer mold truss boom and an inner mold truss boom, removing a first lifting boom and a first penetrating jack as well as a second lifting boom and a second penetrating jack, fixedly connecting an inner template with the outer template through an inner mold opposite pull rod, and pouring new pier body section concrete;
e. Repeating the steps a-d to finish the construction of pier body concrete;
S7, dismantling the whole set of structure
The method comprises the steps of firstly removing an inner template and an inner die truss operation platform at the pier top, lifting back to the ground through hoisting equipment, reversely operating the outer die truss operation platform through a first hydraulic lifting mechanism, reversely operating the climbing rail and the top truss operation platform through the hydraulic lifting mechanism, circularly and repeatedly descending until the climbing rail and the top truss operation platform descend to the ground, and then removing the climbing rail and the top truss operation platform.
According to the technical scheme, the method for continuously jacking the climbing rail jacking jack in the step S4 and the step S6 comprises the steps that a second fulcrum automatic conversion self-locking mechanism positioned on the power end of the jacking jack is clamped in a track groove of the climbing rail, the power end of the jacking jack stretches out to lift the climbing rail and the top truss operation platform through the first fulcrum automatic conversion self-locking mechanism, when one stroke of the jacking jack is finished, the second fulcrum automatic conversion self-locking mechanism positioned below the jacking jack is clamped in the track groove of the climbing rail to prevent the climbing rail and the top truss operation platform from sliding downwards, then the power end of the jacking jack is reset, next jacking is carried out, and the jacking is carried out until the climbing rail and the top truss operation platform reach the designated height.
The beneficial effects of the invention are as follows:
The top truss operation platform is also used as a reinforcing steel bar positioning auxiliary frame, workers can conveniently perform positioning and binding work of long-section vertical main reinforcing steel bars (9 m/12), horizontal stirrups are bound synchronously, and when the horizontal stirrups are bound, the workers can adjust the height of the platform according to the needs, so that the optimal working height is always kept, and the reinforcing steel bar binding efficiency of the workers is fully improved.
In the invention, only four large-area outer templates and four large-area inner templates are provided, and the outer templates are positioned by climbing rails, so that the installation and the positioning are convenient and quick.
According to the invention, climbing of the climbing rail and the top truss operation platform is controlled by controlling the lifting jack, climbing of the outer formwork, the outer formwork truss operation platform, the inner formwork and the inner formwork truss operation platform is controlled by controlling the first penetrating jack and the second penetrating jack, climbing of the whole set of structural system can be independently completed by an operator, other equipment (such as a tower crane) and other manual auxiliary operation are not needed, and the lifting speed of the hydraulic jack is high, the efficiency is high, the cost is saved, and the economic benefit is good.
After the high pier is constructed, the whole set of junction system returns to the ground for the split operation, and compared with the high-altitude demolition construction system in the prior art, the split construction system is safer and more reliable.
The invention combines the advantages of the climbing formwork principle, the sliding formwork principle and the turnover formwork, can better give consideration to the progress, the quality, the safety and the economic benefit, is a comprehensive innovation for high pier construction, has wide application prospect and is in great market opportunity.
Drawings
Fig. 1 is a schematic view of the structure of the present invention in a climbing rail lifting state.
Fig. 2 is a schematic view of the structure of the present invention in a state where the inner and outer forms 11 and 13 are lifted.
Fig. 3 is a schematic structural view of the top truss work platform 1.
Fig. 4 is a schematic diagram showing the connection structure of the outer mold plate 13 and the inner mold plate 11.
Fig. 5 is a schematic structural view of the outer mold truss work platform 3 and the inner mold truss work platform 12.
Fig. 6 is a schematic structural view of the connection of the climbing rail and the jack-up jack 2.
Fig. 7 is a schematic structural view of the first fulcrum automatic changeover self-locking mechanism 21.
Fig. 8 is a schematic structural view of the first fulcrum automatic conversion self-locking mechanism 21 and the second fulcrum automatic conversion self-locking mechanism 22 in the track of the climbing rail 4.
The self-locking device comprises a top truss operation platform 1, a jacking jack 2, an outer die truss operation platform 3, a climbing rail 4, a climbing rail anchoring bolt 5, an embedded climbing rail fixing piece 6, a bridge pier 7, a steel bar 8, a concrete pier body 9, an outer repairing hanger 10, an inner die plate 11, an inner die truss operation platform 12, an outer die plate 13, an inner die truss hanger rod 14, an outer die truss hanger rod 15, a first penetrating jack 16, a first lifting hanger rod 17, a second penetrating jack 18, a second lifting hanger rod 19, an inner die and outer die pair pull rod 20, a first supporting point automatic conversion self-locking mechanism 21, a second supporting point automatic conversion self-locking mechanism 22, an elastic roller 23 and an inner repairing hanger 24;
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to the following embodiments.
In fig. 1 to 8, four climbing rails 4 are fixedly installed on four embedded climbing rail fixing pieces 6 positioned at four corners of a rectangle on a bridge pier 7 of a truss integral lifting type bridge high pier climbing formwork device, the climbing rails 4 are of a steel box girder structure, the side wind resistance is strong, the bearing capacity is good, threat to a structural system caused by high-altitude sudden gusts is prevented, the length of the climbing rails 4 is greater than the construction length of a 3-section bridge high pier body section, a top truss operation platform 1 is fixedly installed at the upper end of the climbing rails 4 through a threaded fastening connecting piece, a climbing rail anchoring bolt 5 is installed at the lower end of the climbing rails 4, the climbing rail anchoring bolt 5 is anchored on a lower section concrete pier body 9 in the construction process, an outer formwork 13 is fixedly installed between two adjacent climbing rails 4 in the circumferential direction through a threaded fastening connecting piece, an inner formwork 11 is arranged on the inner side of the outer formwork 13, the outer formwork 13 is connected with the inner formwork 11 through an inner formwork counter-pull rod 20, an outer formwork operation platform 3 is installed on the outer side of the climbing rails 4, the outer formwork truss operation platform 3 is fixedly connected with the outer formwork 13 through a threaded fastening piece, and the base of the climbing rail 2 is fixedly installed on the outer formwork operation platform through the threaded fastening piece the end part of the piston rod is fixedly connected with a first fulcrum automatic conversion self-locking mechanism 21 through a connecting rod, and the first fulcrum automatic conversion self-locking mechanism 21 is in a structure that the lower ends of two rigid clamping plates are hinged and fixed with the connecting rod, A spring is arranged between the upper ends, a second pivot automatic conversion self-locking mechanism 22 is fixedly connected to an outer mold truss operation platform 3 below the jacking jack 2 through an ear plate, the second pivot automatic conversion self-locking mechanism 22 is the same as the first pivot automatic conversion self-locking mechanism 21, the first pivot automatic conversion self-locking mechanism 21 and the second pivot automatic conversion self-locking mechanism 22 are both positioned in a track groove of the climbing rail 4, uniformly distributed clamping blocks are arranged in the track groove of the climbing rail 4, the distance between two adjacent clamping blocks is less than or equal to the stroke of the jacking jack 2, through grooves are processed in the middle parts of the clamping blocks, the distance between the upper ends of the two clamping plates under the natural shrinkage state of the spring is greater than the distance between the upper ends of the two clamping plates under the state of the minimum length of the spring compressed, the second pivot automatic conversion self-locking mechanism 22 is positioned below, elastic idler wheels 23 are arranged on the outer mold truss operation platform 3, the elastic idler wheel 23 is contacted with the climbing rail 4 and used for positioning the climbing rail 4 in the lifting process of the climbing rail 4, when the climbing rail 4 and the top truss operation platform 1 need to be lifted, the upper end of the first pivot automatic conversion self-locking mechanism 21 is clamped on a clamping block of the climbing rail 4, the power end of the lifting jack 2 stretches out to lift the climbing rail 4 and the top truss operation platform 1, when one stroke of the lifting jack 2 is finished, the second pivot automatic conversion self-locking mechanism 22 positioned below the lifting jack 2 is just clamped on the clamping block in a track groove of the climbing rail 4, the climbing rail 4 and the top truss operation platform 1 are prevented from sliding downwards, the outer die truss operation platform 3 is fixedly connected with the top truss operation platform 1 through the outer die truss suspender 15 and the first hydraulic lifting mechanism, the first hydraulic lifting mechanism consists of a first lifting suspender 17 and a first punching jack 16, the first penetrating jack 16 is fixedly arranged on the inner side of the outer die truss operation platform 3 by a screw fastening connecting piece, the upper end of the first lifting suspender 17 is fixedly arranged on the top truss operation platform 1 by a screw fastening connecting piece, The lower end passes through the first penetrating jack 16 and is fixedly arranged on the outer die truss operation platform 3 by a screw thread fastening connecting piece, the upper end of the outer die truss boom 15 is fixedly arranged on the top truss operation platform 1 by a screw thread fastening connecting piece, the lower end is fixedly arranged on the outer side of the outer die truss operation platform 3 by a screw thread fastening connecting piece, the inner side of the inner die plate 11 is fixedly provided with the inner die truss operation platform 12 by a screw thread fastening connecting piece, the inner die truss operation platform 12 is connected with the top truss operation platform 1 by the inner die truss boom 14 and a second hydraulic lifting mechanism, the second hydraulic lifting mechanism consists of a second lifting boom 19 and a second penetrating jack 18, the second penetrating jack 18 is fixedly arranged on the inner side of the inner die truss operation platform 12 by a screw thread fastening connecting piece, and the upper end of the second lifting boom 19 is fixedly arranged on the top truss operation platform 1 by a screw thread fastening connecting piece, The lower end passes through the second perforating jack 18 and is fixedly arranged on the inner die truss operation platform 12 by using a screw thread fastening connecting piece, the upper end of the inner die truss suspender 14 is fixedly arranged on the top truss operation platform 1 by using a screw thread fastening connecting piece, the lower end is fixedly arranged on the outer side of the inner die truss operation platform 12 by using a screw thread fastening connecting piece, the first hydraulic lifting mechanism is used for lifting the outer die plate 13 and the outer die truss operation platform 3, the second hydraulic lifting mechanism is used for lifting the inner die plate 11 and the inner die truss operation platform 12, the outer repair suspender 10 is fixedly arranged at the bottom of the outer die truss operation platform 3 by using a screw thread fastening connecting piece, the inner repair suspender 24 is fixedly arranged at the bottom of the inner die truss operation platform 12 by using a screw thread fastening connecting piece and is used for repairing some defects on the surface of a bridge pier body by workers.
The construction method of the device comprises the following steps:
s1, installing climbing rail 4
The 4 climbing rails 4 are respectively and fixedly arranged on a climbing rail 4 fixing assembly pre-buried on a bridge pier 7, the perpendicularity of the climbing rails 4 is guaranteed, and after the climbing rails 4 are arranged, 3 temporary wind-carrying ropes are pulled by each climbing rail 4;
S2, installing a top truss operation platform 1 and a head section pier body steel bar
After the top truss operation platform 1 is assembled on the ground, the top truss operation platform is integrally hoisted on the climbing rail 4 through hoisting equipment and fixed at the top, and then the first section pier body vertical steel bars and the horizontal steel bars are installed on the embedded steel bars on the bridge pier 7;
S3, lifting the outer template 13 and the outer die truss operation platform 3, and pouring pier body solid transition section concrete
A. After the concrete reaches the form removal strength, removing the outer form 13 for demoulding, installing a first lifting boom 17 and a first penetrating jack 16, and integrally improving the height of a concrete pouring section through the outer form 13 and the outer mold truss operation platform 3 by the first lifting boom 17 and the first penetrating jack 16;
b. After the outer template 13 and the outer mold truss operation platform 3 are lifted to a specified height, fixing the outer template 13 on the climbing rail 4, installing an outer mold truss boom 15, removing a first lifting boom 17 and a first penetrating jack 16, and then pouring pier body solid transition section concrete;
s4, climbing rail 4 jacking
A. The strength of the newly poured concrete is larger than 7.5Mpa, and the external mold truss suspender 15, the anchor bolts of the climbing rail 4 and the concrete pier surface and the threaded connectors between the climbing rail 4 and the external mold plate 13 are sequentially removed;
b. The whole outer formwork 13 and the outer formwork truss operation platform 3 are used as fixed supporting stress points, the climbing rail 4 and the top truss operation platform 1 are lifted to a designated height through the jacking jack in a repeated continuous mode, and then the rail is fixed on the concrete pier body 9 through the climbing rail anchor bolts 5;
The method for continuously jacking the climbing rail 4 comprises the steps that a second fulcrum automatic conversion self-locking mechanism 22 positioned on the power end of the jacking jack 2 is clamped in a track groove of the climbing rail 4, the power end of the jacking jack 2 stretches out to lift the climbing rail 4 and the top truss operation platform 1 through a first fulcrum automatic conversion self-locking mechanism 21, when the jacking jack 2 runs out in one stroke, the second fulcrum automatic conversion self-locking mechanism 22 positioned below the jacking jack 2 is clamped in the track groove of the climbing rail 4 to prevent the climbing rail 4 and the top truss operation platform 1 from sliding downwards, then the power end of the jacking jack 2 is reset to perform the next jacking, and the jacking is performed repeatedly until the climbing rail 4 and the top truss operation platform 1 reach the designated height;
c. Installing a first lifting boom 17 and a first penetrating jack 16, lifting the outer die plate 13 and the outer die truss operating platform 3 as a whole to be in place through the first penetrating jack once, fixing the outer die plate 13 on the climbing rail 4, installing an outer die truss boom 15, and removing the first lifting boom 17 and the first penetrating jack 16;
S5, installing an inner template 11 and an inner mold truss operation platform 12;
Hoisting the inner template 11 at a specified height through hoisting equipment, fixedly connecting the inner template 11 with the outer template 13 through an inner mold counter pull rod 20, hoisting the inner mold truss operation platform 12 at the specified height through hoisting equipment, fixedly connecting the inner mold truss operation platform 12 with the inner template 11, and fixedly connecting the inner mold truss operation platform 12 with the top truss operation platform 1 through an inner mold truss suspender 14;
s6, construction of standard sections of bridge pier body
A. After concrete is poured between the inner template 11 and the outer template 13, installing upper section steel bars, and dismantling threaded connectors between the inner mould truss suspender 14, the outer mould truss suspender 15, the outer template 13 and the climbing rail 4 when the concrete strength is more than 7.5 Mpa;
b. The whole outer formwork 13 and the outer formwork truss operation platform 3 are used as fixed supporting stress points, the climbing rail 4 and the top truss operation platform 1 are lifted to a designated height through the jacking jack in a repeated continuous mode, and then the rail is fixed on the concrete pier through the climbing rail anchor bolts 5;
c. the first lifting boom 17, the first penetrating jack 16, the second lifting boom 19 and the second penetrating jack 18 are installed, the outer die plate 13 and the inner die plate 11 are removed for demoulding, and the outer die plate 13 and the outer die truss operating platform 3 are lifted in place through the first penetrating jack once as a whole;
d. The outer formwork 13 is fixed on the climbing rail 4, an outer mold truss boom 15 and an inner mold truss boom 14 are installed, a first lifting boom 17, a first penetrating jack 16, a second lifting boom 19 and a second penetrating jack 18 are removed, an inner formwork 11 and the outer formwork 13 are fixedly connected through an inner mold opposite pull rod 20, and new pier body section concrete is poured;
e. Repeating the steps a-d to finish the construction of pier body concrete;
S7, dismantling the whole set of structure
Firstly, the inner template 11 and the inner die truss operation platform 12 are removed from the pier top, the outer die truss operation platform 3 is hoisted back to the ground through hoisting equipment, the climbing rail 4 and the top truss operation platform 1 are circularly and repeatedly lowered until the outer die truss operation platform is lowered to the ground through the reverse operation of the hoisting action of the first hydraulic hoisting mechanism, and then the outer die truss operation platform is removed.
For the high pier construction of the bridge, the construction period is mainly determined by a steel bar binding process and a concrete pouring process, after the concrete pouring is finished, the next section of steel bars can be hoisted to the top truss operation platform in strong time such as concrete, meanwhile, binding work of the next section of steel bars can be carried out, the top truss operation platform is also used as a steel bar positioning auxiliary frame, workers can conveniently carry out positioning binding work of the long section of vertical main steel bars (9 m), horizontal stirrups are synchronously bound, the workers can adjust the height of the platform according to the requirement when the horizontal stirrups are bound, the optimal operation height is always kept, the steel bar binding efficiency of the workers is fully improved, the construction progress is accelerated, the construction period is shortened, the use time of matched input equipment such as a tower crane and an elevator is greatly reduced, the cost is reduced, the economic benefit is good, and the integral lifting type bridge high pier climbing formwork construction method of the bridge is compared with the conventional construction method index, as shown in table 1.
TABLE 1
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010714107.8A CN111749140B (en) | 2020-07-23 | 2020-07-23 | A truss integral lifting bridge high pier climbing formwork device and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010714107.8A CN111749140B (en) | 2020-07-23 | 2020-07-23 | A truss integral lifting bridge high pier climbing formwork device and construction method |
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| CN112458918A (en) * | 2020-12-03 | 2021-03-09 | 中交四航局第一工程有限公司 | High-pier hydraulic jacking integral steel frame platform formwork turnover construction system and construction method |
| CN112982986A (en) * | 2021-01-30 | 2021-06-18 | 中交第一航务工程局有限公司 | Construction method of square pier template |
| CN113417213A (en) * | 2021-06-28 | 2021-09-21 | 中交路桥建设有限公司 | Integral truss type pull-rod-free turnover formwork system and turnover construction method |
| CN114892528B (en) * | 2022-05-23 | 2024-03-05 | 云南交投集团云岭建设有限公司 | Construction method of double-layer template of uniform-section thin-wall hollow pier |
| CN118004904B (en) * | 2024-04-08 | 2024-06-25 | 中铁三局集团有限公司 | Hoisting type construction work platform |
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| CH666317A5 (en) * | 1984-07-07 | 1988-07-15 | Moog Ag Brueckenuntersichtsger | Climbing frame for small-section tall structures - has adjustable rings with clamps and lifting jacks |
| JPH0518106A (en) * | 1991-07-17 | 1993-01-26 | Mitsubishi Heavy Ind Ltd | Constructing device for concrete building |
| JP3981469B2 (en) * | 1998-06-02 | 2007-09-26 | ヤマハ化工建設株式会社 | Construction method of concrete structure |
| CN2660027Y (en) * | 2003-09-18 | 2004-12-01 | 山东省路桥集团有限公司 | Hydraulic auto climbing appts. |
| CN100351484C (en) * | 2005-11-07 | 2007-11-28 | 中建一局建设发展公司 | Liftable hydraulic climbing template and construction method thereof |
| US9016025B2 (en) * | 2012-06-11 | 2015-04-28 | Zhejiang Construction Engineering Group Co., Ltd | Constructing method for concrete cylinder of construction steel bar of high-rise steel structure |
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| CN208934399U (en) * | 2018-09-05 | 2019-06-04 | 中交一航局第三工程有限公司 | A construction device for a pier column with a rectangular section |
| CN209384643U (en) * | 2018-12-24 | 2019-09-13 | 山东铁鹰建设工程有限公司 | A kind of slip-form lifting device of thin-walled hollow pier stud |
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