CN109457618B - Cast-in-place construction method for concrete main beam - Google Patents
Cast-in-place construction method for concrete main beam Download PDFInfo
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- CN109457618B CN109457618B CN201811513051.9A CN201811513051A CN109457618B CN 109457618 B CN109457618 B CN 109457618B CN 201811513051 A CN201811513051 A CN 201811513051A CN 109457618 B CN109457618 B CN 109457618B
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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Abstract
The invention relates to the technical field of bridge construction methods, in particular to a cast-in-place construction method for a concrete girder. The method comprises the steps of building a supporting leg foundation which is arranged at intervals along the bridge direction below a main beam to be poured, building two sets of disc buckling supports with at least three sets of walking supporting legs by means of the supporting leg foundation, arranging templates on the disc buckling supports to pour the main beam, after pouring is completed, driving the two sets of disc buckling supports to move back along a transverse bridge after demolding is completed, completely avoiding pier columns, driving the disc buckling supports to move to the position below the main beam to be poured next along the bridge direction, driving the two sets of disc buckling supports to move in opposite directions to combine to form a template support of the main beam to be poured next, and sequentially carrying out pouring until all main beam pouring construction is completed. The movable support pouring construction method is simple to operate, can adapt to pouring construction of the variable cross-section box girder, is lower in cost and more convenient to build the template support compared with a full-hall support pouring method, and has great popularization value.
Description
Technical Field
The invention relates to the technical field of bridge construction methods, in particular to a cast-in-place construction method for a concrete girder.
Background
In China, a plurality of methods are used for cast-in-place construction of the superstructure of the concrete bridge, the methods correspond to different support formwork systems respectively, and a hanging basket, a full-space support, a beam type support, an upstroke movable formwork, a downstroke movable formwork and the like are common.
The hanging basket is commonly used for the cantilever pouring construction of a large-span continuous beam bridge, is not influenced by the bridge span terrain and the height, has a light structure, does not need large-scale hoisting equipment, but can only be pushed section by section during pouring, is limited in construction speed, and is not suitable for the construction of a concrete main beam with a widened section.
Full hall support and beam type support all belong to and fall to the ground support, fall to the ground support's advantage and lie in making the bridge wholeness better, and the shortcoming is that the installation of support, demolition time are longer, and support template consumption is big, and is relatively poor to high mound girder construction adaptability. The full-space support is greatly influenced by the bridge span terrain, and has higher requirement on the bearing capacity of the foundation; the beam type support has certain adaptability to the bridge-spanning terrain, but needs large-scale hoisting equipment for auxiliary construction.
The ascending movable formwork and the descending movable formwork are not influenced by the terrain and height of the bridge span, but can only carry out gradually-span push type pouring, the design requirement on the equipment structure is strict, the early-stage investment cost is high, and meanwhile, the method is not suitable for construction of a concrete main beam with a widened or variable height section.
The invention provides a movable support structure to solve the existing technical problems, and the Chinese invention patent with the patent number of CN106120563B named as a construction method based on a composite movable formwork cast-in-place box girder introduces a composite formwork structure capable of moving along the longitudinal direction and the transverse direction of a girder. But because this die carrier is built and is supported on installing the bracket on the pier stud, the bracket need be along bridge construction direction full pavement, and the building of bracket needs consume a large amount of costs, and the whole difficulty of building is also fairly big moreover, needs to change the original structure of pier stud, and this can cause the damage of pier stud structure undoubtedly.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provide a cast-in-place construction method of a concrete main beam.
The technical scheme of the invention is as follows: a cast-in-place construction method of a concrete girder is characterized in that: the method comprises the steps of building a supporting leg foundation which is arranged at intervals along the bridge direction below a main beam to be built, building two sets of disc buckling supports with at least three sets of walking supporting legs by means of the supporting leg foundation, arranging templates on the disc buckling supports to build the main beam, after the main beam is built, driving the two sets of disc buckling supports to move back and forth along a transverse bridge after demolding is finished, completely avoiding pier columns, driving the disc buckling supports to move to the position below the main beam to be built next along the bridge direction, driving the two sets of disc buckling supports to move in opposite directions to combine to form the template support of the main beam to be built next, and sequentially carrying out pouring until all main beam pouring construction is finished.
The method for further constructing the supporting leg foundation comprises the following steps: the method comprises the steps that a supporting leg foundation is poured on the ground below a main beam to be poured along the transverse bridge direction, and sliding rails arranged along the transverse bridge direction are installed on the upper end face of the supporting leg foundation.
The further method for building the disc buckle support comprises the following steps: install the lower extreme that the support was buckled to the dish with at least three groups walking landing legs, make the upper end of walking landing leg connect in the dish along bridge to the gliding ground and detain the support, adjacent walking landing leg along bridge to interval arrangement, then the handling dish detains the support and walking landing leg to the landing leg basis on, make walking landing leg lower extreme sliding connection on the landing leg basis.
The further method for driving the two groups of disc buckle supports to move back along the transverse bridge comprises the following steps: and applying traction acting force in the transverse bridge direction to the two groups of disc buckle supports to enable the lower ends of the walking support legs below the disc buckle supports to move along the transverse bridge direction of the support leg foundation.
The method for further driving the buckling bracket of the drive disc to move to the position below the next girder to be poured along the bridge direction comprises the following steps: under the condition of maintaining the stability of the disc buckle support, a plurality of groups of walking support legs are separated from the corresponding support leg foundation below the disc buckle support, the weight of the disc buckle support is transferred to the walking support legs which are not separated from the support leg foundation, traction force is applied to the disc buckle support along the bridge direction to drive the disc buckle support to slide and move on the walking support legs which are not separated from the support leg foundation, after the disc buckle support slides in place, the walking support legs which are separated from the support leg foundation and move along with the disc buckle support are re-supported on the support leg foundation below the disc buckle support, and the operation is sequentially performed alternately until the disc buckle support moves to the position below the next girder.
The further method for separating the walking supporting legs from the supporting leg foundation corresponding to the walking supporting legs below comprises the following steps: vertical ascending effort is exerted to sliding connection in the landing leg second connection support on the landing leg basis in the walking landing leg, makes the second connect the support along vertical removal, breaks away from below landing leg basis back completely, passes the lower sleeve on the second connection support and upper sleeve on sliding connection in the walking landing leg first connection support of dish knot support with horizontal bolt, makes lower sleeve and upper sleeve fix again, accomplishes the shrink process of walking landing leg.
The method for applying vertical upward force to the second connecting support comprises the following further steps: the horizontal first fixed rod is installed on the outer side of the lower sleeve, the corresponding second fixed rod is installed on the outer side of the upper sleeve, the pull rope is sleeved on the first fixed rod, the pull rope is wound on the second fixed rod, and pulling force is applied to the pull rope part wound on the second fixed rod to force the second connecting support to move vertically.
The further method for re-supporting the walking leg which is moved along with the disc buckle bracket and is separated from the leg base on the leg base below comprises the following steps: the temporary support with the groove is installed on the upper end face of the supporting leg base, the walking supporting leg to be moved along with the disc buckle support moves to the position above the supporting leg base, the walking supporting leg is adjusted to extend, and the lower end of the walking supporting leg is supported on the temporary support.
The invention has the advantages that: 1. the walking support legs capable of moving along the forward bridge direction and the transverse bridge direction are arranged at the lower end of the disc buckle support, so that the disc buckle support has a bidirectional moving function, the blocking of pier columns can be effectively avoided in the moving process, the utilization rate of the disc buckle support is improved, and the problems that the full-scale support is too high in construction cost and cannot move are solved;
2. the pouring construction of the irregular beam body is realized through the movable disc buckling support, the problem that a hanging basket or other walking supports cannot be suitable for the pouring construction of the box beam with the variable cross section is solved, and the difficulty of the pouring construction of the box beam is reduced;
3. by using the walking support legs and the support leg foundation in a matched manner, the laying cost of the support leg foundation is reduced, the problem that the traditional walking support needs to fully lay the support leg foundation along the bridge direction is solved, the building cost of the support leg foundation is reduced, and the construction difficulty is reduced;
4. the walking supporting legs alternately advance, so that the walking difficulty of the whole disc buckle support is reduced, and the pouring efficiency of the beam body is improved;
5. through setting up interim support on the landing leg basis, for the walking landing leg that slides so far provides interim support, avoid because weight is too big to destroy the landing leg basis, interim support can carry on spacingly to the walking landing leg, avoids because the incident that slides and cause takes place.
The movable support pouring construction method is simple to operate, can adapt to pouring construction of the variable cross-section box girder, is lower in cost and more convenient to build the template support compared with a full-hall support pouring method, and has great popularization value.
Drawings
FIG. 1: the invention is a front view of a mobile bracket;
FIG. 2: the moving bracket of the invention is a schematic diagram of a moving structure along a transverse bridge direction;
FIG. 3: front view of the walking leg of the present invention;
FIG. 4: a side view of the walking leg of the present invention;
FIG. 5: a side view of the mobile carriage of the present invention;
FIG. 6: the invention is a schematic structural diagram of a step 1 of moving a movable support along a forward bridge direction;
FIG. 7: the invention has a schematic structure diagram of a step 2 of moving a movable support along the forward bridge direction;
FIG. 8: the invention has a schematic structure diagram of a step 3 of moving a movable support along the forward bridge direction;
FIG. 9: the moving bracket of the invention moves along the forward bridge direction and step 4 is a schematic structural diagram;
FIG. 10: the moving bracket of the invention moves along the forward bridge direction step 5 schematically;
FIG. 11: the moving bracket of the invention moves along the forward bridge direction step 6 schematically;
wherein: 1-coiling and buckling the bracket; 2-a support leg foundation; 3, a slide rail; 4-a first connecting support; 5-a second connecting support; 6, an upper sleeve; 7, a lower sleeve; 8, inserting a pin; 9 — a first via; 10-a second via; 11 — a first fixing bar; 12-a second fixing bar; 13-pulling a rope; 14-a stringer; 15-track; 16-upper roller; 17-lower roller; 18-temporary support.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The movable support of the embodiment can realize the movement in the transverse bridge direction and the forward bridge direction, so that the movable support is suitable for bridge pouring at different positions and avoids structures such as pier columns and the like existing in the bridge pouring process. As shown in fig. 1-2 and 5-11, the support structure itself of this embodiment is a disc buckling support 1 for supporting a bridge pouring template, and the disc buckling support 1 can be adjusted according to the size of a box girder to be poured, so as to adapt to pouring construction of the variable cross-section box girder. The lower end of the coil buckle support 1 is anchored on a steel plate platform through a bolt structure, a plurality of transverse beams arranged along the bridge direction at intervals are laid below the steel plate platform, a plurality of longitudinal beams 14 arranged along the transverse bridge direction at intervals are laid at the lower end of each transverse beam, and the transverse beams and the longitudinal beams 14 are arranged in a vertically and horizontally staggered mode and used for supporting the whole coil buckle support 1 structure.
The movable support of this embodiment comprises two sets of dish knot support 1 along horizontal bridge to interval arrangement, and two sets of dish knot support 1 make up when pouring and form the bearing structure who is used for pouring the box girder, as shown in fig. 1 ~ 2. The lower end of each group of the plate buckle support 1 is provided with at least three groups of walking support legs which are arranged along the bridge direction at intervals, as shown in fig. 5-11, the lower end of the plate buckle support 1 of the embodiment is provided with four groups of walking support legs.
As shown in fig. 3-4, the walking legs comprise a first connecting support 4 connected to the disc buckle support 1 in a sliding manner, the longitudinal beam 14 of the present embodiment is arranged along the direction along the bridge direction, the lower end of the longitudinal beam 14 is provided with a transverse bridge track 15 arranged in an inverted T shape, and the first connecting support 4 is provided with an upper roller 16 which is hooked on the track 15 and can slide along the bridge direction. The upper roller 16 is hooked on the rail 15 to realize the movement of the walking leg along the bridge direction of the rail 15.
As shown in fig. 3-4, the walking support leg comprises a second connecting support 5 connected to the support leg base 2 in a sliding manner, the support leg base 2 is a reinforced concrete foundation poured on the ground, and a lower roller 17 which can be supported on the sliding rail 3 in a sliding manner along the transverse bridge direction is arranged at the lower end of the second connecting support 5. The lower roller 17 is connected on the slide rail 3 arranged along the transverse bridge direction in a sliding manner, so that the walking support legs move along the slide rail 3 in the transverse bridge direction.
In order to realize the movement of the walking legs along the direction along the bridge direction, a telescopic structure capable of extending along the vertical contraction is arranged between the first connecting support 4 and the second connecting support 5 in the embodiment, as shown in fig. 3 to 4, the telescopic structure comprises an upper sleeve 6 fixed at the lower end of the first connecting support 4 and a lower sleeve 7 fixed at the upper end of the second connecting support 5, and the upper sleeve 6 and the lower sleeve 7 can be sleeved together along the vertical movement. A plurality of first through holes 9 arranged along the vertical interval are formed in the upper sleeve 6, a plurality of second through holes 10 arranged along the vertical interval are formed in the lower sleeve 7, the first through holes 9 and the second through holes 10 are arranged in a penetrating mode along the horizontal direction through the bolts 8, and the upper sleeve 6 and the lower sleeve 7 which are adjusted vertically are fixed.
As shown in fig. 3 to 4, in order to drive the upper sleeve 6 and the lower sleeve 7 to generate vertical relative displacement, the present embodiment is provided with a driving structure on the upper sleeve 6 and the lower sleeve 7, the driving structure includes a first fixing rod 11 penetrating through the lower sleeve 7 in the horizontal direction and a pulling rope 13 sleeved on and fixed on the first fixing rod 11, the pulling rope 13 is arranged vertically, the lower end of the pulling rope is fixed on the first fixing rod 11, and the upper end of the pulling rope is connected with a power device driving the pulling rope 13 to move vertically. The driving structure further comprises a second fixing rod 12 which is arranged on the upper sleeve 6 in a penetrating mode in the horizontal direction, and the pulling rope 13 is wound on the second fixing rod 13. The pull rope 13 is driven to move by a driving device such as a winch, and the second fixing rod 12 changes the moving direction of the pull rope 13, so that the lower sleeve 7 moves along the vertical direction.
Walking landing leg removes the in-process and supports on landing leg basis 2, and this embodiment is provided with the interim support 18 that is used for carrying out interim support to walking landing leg at 2 up ends of landing leg support, and interim support 18 is pre-buried and just offers the steel sheet that holds the U type slotted hole of walking landing leg lower extreme at 2 up ends of landing leg support.
In actual operation, the method comprises the following steps: 1. before the support is erected, the overall planning design of the support structure and movement is made, and each part is processed on the back according to the design requirement;
2. firstly, constructing a support leg foundation 2 according to an overall planning design, and installing a slide rail 3, wherein the length of the support leg foundation 2 is required to meet the requirement that a support frame is integrally transversely moved and staggered with a pier column, so that the support leg foundation does not collide with the pier column during longitudinal movement;
3. the longitudinal beam 14 and the walking support leg are processed in advance, assembly connection is carried out at the bridge span, and the driving equipment is also installed at the same time and is installed on the slide rail 3 of the support leg foundation 2;
4. after the longitudinal beams 14 are completely installed, cross beams are laid, then steel plate platforms are installed, the cross beams and the steel plate platforms form a platform structure together, and connecting bolt structures which are connected with bases of the disc buckle supports 1 are arranged on the steel plate platforms;
5. after the steel plate platform is installed, the disc buckle support 1 can be arranged according to the load of the main beam, the bottoms of the supports are reliably connected through connecting bolts, and reinforcing measures such as horizontal link rods are arranged at the bottoms of the supports, so that the integrity of the supports is improved;
6. after the disc buckle support 1 is erected to the designed elevation, a distribution beam, a template and the like can be installed, and then the construction of a concrete main beam is carried out;
7. after the construction of the main beam is finished, the template is removed, and the two groups of disc buckle supports 1 are driven by power equipment to move along the transverse bridge direction, so that the disc buckle supports 1 are separated from the lower part of the poured beam body;
8. and (4) moving to the next pouring construction station along the bridge direction, and performing pouring construction on the next section of beam body until all the beam sections are poured.
The method for moving the bracket along the forward bridge direction in the embodiment shown in fig. 5 to 11 comprises the following steps:
step 1: as shown in fig. 5-6, four walking legs A, B, C, D are arranged below each set of buckle support 1 and are respectively supported on the corresponding four leg bases a, B, C and D, wherein D is at the foremost end of the whole support in the advancing direction, when moving, the legs a and C are vertically adjusted, the bolts 8 in the two sets of walking legs are firstly pulled out, the lower sleeve 7 is driven to vertically move, and the weight of the whole support is transferred to the walking legs B and D;
step 2: as shown in fig. 7, the fastener support 1 is driven to move along the bridge direction, and the fastener support 1 and the walking legs B and D generate relative displacement sliding until the walking legs a and C move to the positions above the leg bases B and D respectively;
and step 3: as shown in fig. 8, the walking legs a and C are lowered to support the walking legs a and C on temporary supports on leg bases B and D, respectively, and then the walking legs B and D are driven to move in the bridge-following direction to above leg bases C and e;
and 4, step 4: as shown in fig. 9, the walking legs B and D are lowered to be supported on temporary supports on leg bases C and e, respectively, and the walking legs a and C are retracted to separate the walking legs a and C from the lowered leg bases B and D;
and 5: as shown in fig. 10, the fastener support 1 is driven to move along the bridge direction, and the fastener support 1 and the walking legs B and D generate relative displacement sliding until the walking legs a and C move to the positions above the leg bases C and e respectively;
step 6: as shown in fig. 11, the steps are sequentially and alternately performed until the disc buckle support 1 moves to the position below the next span box girder to be poured, that is, the walking legs A, B, C and D are respectively supported on the leg bases e, f, g and h, and the forward movement of the disc buckle support 1 is completed.
This embodiment is provided with the walking landing leg row that the multirow was arranged along following the bridge to interval arrangement at every lower extreme of group dish knot support 1, and every row of walking landing leg row includes a plurality of walking landing legs along horizontal bridge to interval arrangement, is provided with the connecting rod between the walking landing leg that is in with the row.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A cast-in-place construction method of a concrete girder is characterized in that: the method comprises the steps that supporting leg foundations (2) which are arranged at intervals along the bridge direction are built below a main beam to be poured, two groups of disc buckle supports (1) with at least three groups of walking supporting legs are built by means of the supporting leg foundations (2), a template pouring main beam is arranged on the disc buckle supports (1), after pouring is completed, the two groups of disc buckle supports (1) are driven to move back and forth along a transverse bridge after demolding is completed, after pier columns are completely avoided, the driving disc buckle supports (1) move to the position below the main beam to be poured next along the bridge direction, the two groups of disc buckle supports (1) are driven to move in opposite directions to form a template support of the main beam to be poured next, and pouring construction of all the main beams is sequentially completed;
the method for driving the buckle bracket (1) to move to the position below the next girder to be poured along the bridge direction comprises the following steps: under the condition of maintaining the stability of the disc buckle support (1), a plurality of groups of walking legs are separated from the corresponding leg bases (2) below the walking legs, the weight of the disc buckle support (1) is transferred to the walking legs which are not separated from the leg bases (2), the disc buckle support (1) is applied with traction force along the bridge to slide and advance on the walking legs which are not separated from the leg bases (2), after the disc buckle support (1) slides in place, the walking legs which are separated from the leg bases (2) and move along with the disc buckle support (1) are re-supported on the leg bases (2) below the disc buckle support, and the operation is sequentially and alternately performed until the disc buckle support (1) moves to the position below the next girder to be poured.
2. The cast-in-place construction method of the concrete girder of claim 1, wherein: the method for constructing the supporting leg foundation (2) comprises the following steps: the method comprises the steps that a supporting leg foundation (2) is poured on the ground below a main beam to be poured along the transverse bridge direction, and a sliding rail (3) arranged along the transverse bridge direction is installed on the upper end face of the supporting leg foundation (2).
3. The cast-in-place construction method of the concrete girder of claim 1, wherein: the method for building the disc buckle support (1) comprises the following steps: install the lower extreme that support (1) was detained to the dish with at least three groups walking landing legs, make the upper end of walking landing leg along following the bridge to connecting in the dish with sliding and detaining support (1), adjacent walking landing leg along following the bridge to interval arrangement, then the handling dish detains support (1) and walking landing leg to landing leg basis (2) on, make walking landing leg lower extreme sliding connection on landing leg basis (1).
4. The cast-in-place construction method of the concrete girder of claim 1, wherein: the method for driving the two groups of disc buckle supports (1) to move back along the transverse bridge comprises the following steps: and applying traction acting force in the transverse bridge direction to the two groups of disc buckle supports (1) to enable the lower ends of the walking support legs below the disc buckle supports (1) to move in the transverse bridge direction along the support leg foundation (2).
5. The cast-in-place construction method of the concrete girder of claim 1, wherein: the method for separating the walking supporting leg from the supporting leg base (2) corresponding to the walking supporting leg comprises the following steps: apply vertical ascending effort to second connection support (5) of sliding connection on landing leg basis (2) in the walking landing leg, make second connection support (5) along vertical movement, break away from below landing leg basis (2) completely after, with lower sleeve (7) of horizontal bolt (8) on second connection support (5) and upper sleeve (6) of sliding connection on first connection support (4) of dish knot support (1) in the walking landing leg, make lower sleeve (7) and upper sleeve (6) fix again, accomplish the shrink process of walking landing leg.
6. The cast-in-place construction method of the concrete girder of claim 5, wherein: the method for applying the vertical upward acting force to the second connecting support (5) comprises the following steps: the outer side of the lower sleeve (7) is provided with a horizontal first fixing rod (11), the outer side of the upper sleeve (6) is provided with a corresponding second fixing rod (12), the first fixing rod (11) is sleeved with a pull rope (13), the pull rope (13) is wound on the second fixing rod (12), and the pull rope (13) wound on the second fixing rod (12) is partially pulled to force the second connecting support (4) to move vertically.
7. The cast-in-place construction method of the concrete girder of claim 5, wherein: the method for re-supporting the walking support leg which is separated from the support leg base (2) and moves along with the coiling buckle support (1) on the support leg base (2) below comprises the following steps: the upper end face of the supporting leg base (2) is provided with a temporary support (18) with a groove, and after the walking supporting leg to be moved along with the disc buckle support (1) moves to the position above the supporting leg base (2), the walking supporting leg is adjusted to extend, and the lower end of the walking supporting leg is supported on the temporary support (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811513051.9A CN109457618B (en) | 2018-12-11 | 2018-12-11 | Cast-in-place construction method for concrete main beam |
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| CN201811513051.9A CN109457618B (en) | 2018-12-11 | 2018-12-11 | Cast-in-place construction method for concrete main beam |
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| CN109457618B true CN109457618B (en) | 2021-06-01 |
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| CN1337498A (en) * | 2000-08-03 | 2002-02-27 | 章启光 | In-situ support system and its construction method |
| CN201386251Y (en) * | 2009-04-15 | 2010-01-20 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | Transverse unit of beam column bracket |
| KR20130040409A (en) * | 2011-10-14 | 2013-04-24 | 코벡주식회사 | System and method for launching upper structure of bridege |
| CN202989781U (en) * | 2012-12-12 | 2013-06-12 | 广东省长大公路工程有限公司 | Width widened cast-in-place box beam moving support |
| CN206941413U (en) * | 2017-07-10 | 2018-01-30 | 中交第二航务工程局有限公司 | A kind of support integral slipping system for concrete girder construction |
| CN207700067U (en) * | 2017-12-22 | 2018-08-07 | 四川路桥华东建设有限责任公司 | A kind of packaged type box culvert construct trolley |
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2018
- 2018-12-11 CN CN201811513051.9A patent/CN109457618B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337498A (en) * | 2000-08-03 | 2002-02-27 | 章启光 | In-situ support system and its construction method |
| CN201386251Y (en) * | 2009-04-15 | 2010-01-20 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | Transverse unit of beam column bracket |
| KR20130040409A (en) * | 2011-10-14 | 2013-04-24 | 코벡주식회사 | System and method for launching upper structure of bridege |
| CN202989781U (en) * | 2012-12-12 | 2013-06-12 | 广东省长大公路工程有限公司 | Width widened cast-in-place box beam moving support |
| CN206941413U (en) * | 2017-07-10 | 2018-01-30 | 中交第二航务工程局有限公司 | A kind of support integral slipping system for concrete girder construction |
| CN207700067U (en) * | 2017-12-22 | 2018-08-07 | 四川路桥华东建设有限责任公司 | A kind of packaged type box culvert construct trolley |
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|---|---|
| CN109457618A (en) | 2019-03-12 |
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