CN107829374B - Movable formwork for highway prestressed concrete box girder and cantilever construction method - Google Patents
Movable formwork for highway prestressed concrete box girder and cantilever construction method Download PDFInfo
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- CN107829374B CN107829374B CN201711328837.9A CN201711328837A CN107829374B CN 107829374 B CN107829374 B CN 107829374B CN 201711328837 A CN201711328837 A CN 201711328837A CN 107829374 B CN107829374 B CN 107829374B
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The utility model provides a highway prestressing force concrete case roof beam movable mould frame, includes braced system, main frame system, outer rib system, external mold system and centre form system, braced system is used for supporting and removing main frame system, and main frame system is used for hanging outer rib system, external mold system and centre form system, and outer rib system is used for supporting and controlling opening and shutting of external mold system, and external mold system is used for carrying out the pouring of concrete case roof beam with the cooperation ligature of centre form system. The invention also provides a method for carrying out concrete box girder overhanging construction by adopting the highway prestressed concrete box girder movable mould frame. The whole movable die carrier provided by the invention adopts a two-span double-guide beam structure form, and the bearing of the front and rear main supporting devices tends to be uniform in the pouring process of the form; when the large cantilever is longitudinally moved, the anti-overturning stability is strong. The outer mold system is opened and closed in a rotary opening mode, so that the opening operation is few, the operation is simple, and the outer mold can be opened and closed only by one stroke of the oil cylinder; reduces labor intensity and has high die opening efficiency.
Description
Technical field:
the invention relates to the technical field of road and bridge construction, in particular to a highway prestressed concrete box girder movable formwork for highway girder part construction of a pier top of a highway-railway combined construction section and an overhanging construction method.
The background technology is as follows:
in the highway construction of the highway and railway combined building section in the prior art, the bridge pier is higher and wider, the difficulty of highway and railway combined building is higher, the movable formwork in the prior art is overweight tonnage, the casting construction is carried out by adopting the conventional movable formwork, the via hole is difficult, and the time and the labor are wasted.
The invention comprises the following steps:
in view of the foregoing, it is desirable to provide a mobile form for a riding-on self-propelled highway prestressed concrete girder, which can be self-perforated.
It is also necessary to provide a method for constructing the highway prestressed concrete tank Liang Xuantiao by using the movable formwork.
The movable formwork comprises a supporting system, a main frame system, an outer rib system, an outer mold system and an inner mold system, wherein the supporting system is used for supporting and moving the main frame system, the main frame system is used for hanging the outer rib system, the outer mold system and the inner mold system, the outer rib system is used for supporting and controlling the opening and closing of the outer mold system, and the outer mold system is used for being bound with the inner mold system in a matching manner to perform pouring of the concrete box girder;
the support system comprises a front auxiliary support device, a front main support device, a rear main support device and a rear auxiliary support device, wherein the main frame system comprises a main beam, a front guide beam and a rear guide beam, the front auxiliary support device and the front guide beam are assembled into a whole for supporting, the front main support device is assembled at the front end of the main beam, the front main support device is supported at the pier top of a pier, the rear main support device is assembled at the rear end of the main beam, the rear main support device is supported on a roadbed or a poured beam surface, and the rear auxiliary support device and the rear guide beam are assembled into a whole; the outer rib system comprises a left outer rib, a left rotary oil cylinder, a right outer rib and a right rotary oil cylinder, and the outer mold system comprises a left wing mold, a left belly mold, a left bottom mold, a right belly mold, a right wing mold, a bottom mold supporting piece, a left supporting piece and a right supporting piece; the left outer rib is hinged with the left side of the main beam through a left rotary oil cylinder, and the right outer rib is hinged with the right side of the main beam through a right rotary oil cylinder; the left wing die is connected with the left belly die, the left belly die is connected with the left bottom die, the left bottom die is connected with the right bottom die, the right bottom die is connected with the right belly die, and the right belly die is connected with the right wing die; the right outer rib and the left outer rib are connected with the left bottom die and the right bottom die through bottom die supporting pieces, the left outer rib is connected with the left belly die and the left wing die through left supporting pieces, the right outer rib is connected with the right belly die and the right wing die through right supporting pieces, and the inner die system is assembled and bound on the outer die system.
Preferably, the front auxiliary supporting device comprises a supporting frame, a left supporting leg, a right supporting leg, a connecting beam, a left supporting oil cylinder and a right supporting oil cylinder, wherein the supporting frame is assembled at the upper ends of the left supporting leg and the right supporting leg, the connecting beam is connected with the left supporting leg and the right supporting leg, the left supporting oil cylinder is assembled with the bottom of the left supporting leg, and the right supporting oil cylinder is assembled with the bottom of the right supporting leg.
Preferably, the front main supporting device comprises a shifting trolley, a front cross beam and an adjustable supporting upright post, the rear main supporting device comprises a shifting trolley, a rear cross beam and a supporting upright post, the shifting trolley comprises a bracket, a hooking mechanism, a longitudinal shifting mechanism, a transverse shifting mechanism, a supporting mechanism and a longitudinal shifting slideway, the hooking mechanism is provided with a hooking oil cylinder, the longitudinal shifting mechanism is provided with a longitudinal shifting oil cylinder, the transverse shifting mechanism is provided with a transverse shifting oil cylinder, the supporting mechanism is provided with a supporting oil cylinder, and the hooking mechanism, the longitudinal shifting mechanism, the transverse shifting mechanism, the supporting mechanism and the longitudinal shifting slideway are provided with brackets; the bracket of the shifting trolley of the front main supporting device is assembled on the front cross beam, the adjustable supporting upright post is fixedly assembled with the front cross beam, the adjustable supporting upright post is supported on the pier top bridge deck, the bottom web plate at the front end of the main beam and the lower chord member of the front guide beam are opposite to the longitudinal shifting slideway, the cylinder end of the longitudinal shifting cylinder is fixedly connected with the bracket, the rod end is connected with the web plate at the front end of the main beam through a connecting lug seat, the cylinder end of the supporting cylinder is fixedly arranged on the bracket, the rod end is fixedly supported on the web plate at the front end of the main beam, the cylinder end of the transverse shifting cylinder is fixed on the bracket, the rod end of the transverse shifting cylinder is used for controlling the left and right movement of the bracket, and thus the left and right movement of the main beam is controlled; the bracket of the shifting trolley of the rear main supporting device is assembled on the rear cross beam, the supporting upright post is assembled with the rear cross beam, the supporting upright post is supported on a roadbed or a poured beam surface, a web plate at the bottom of the rear end of the main beam and a lower chord member of the rear guide beam are opposite to the longitudinal shifting slideway, the cylinder end of the longitudinal shifting cylinder is fixedly connected with the bracket, the rod end is connected with the web plate at the rear end of the main beam through a connecting lug seat, the cylinder end of the supporting cylinder is fixedly arranged on the bracket, the rod end is fixedly supported on the web plate at the rear end of the main beam, the cylinder end of the transverse shifting cylinder is fixed on the bracket, and the transverse shifting cylinder is used for controlling the left and right movement of the bracket so as to control the left and right movement of the main beam.
Preferably, the rear auxiliary supporting device comprises a stand column, a running wheel box and a spherical hinge, wherein the upper end of the stand column is assembled with the rear guide beam, the lower end of the stand column is assembled with the running wheel box, the spherical hinge is assembled with the running wheel box, and the running wheel box and the spherical hinge run on a track paved on a bridge deck.
Preferably, the main beams comprise a left main beam, a right main beam, a left cantilever beam, a right cantilever beam and a connecting beam, wherein the left main beam is connected with the left cantilever beam, the right main beam is connected with the right cantilever beam, the connecting beam is connected between the left main beam and the right main beam, the left outer rib is hinged with the left cantilever beam through a left rotary oil cylinder, and the right outer rib is hinged with the right cantilever beam through a right rotary oil cylinder; the front guide beam comprises a front left guide beam and a front right guide beam, the rear guide beam comprises a rear left guide beam and a rear right guide beam, the front left guide beam is connected with the front end of the left main beam, the front right guide beam is connected with the front end of the right main beam, the rear left guide beam is connected with the rear end of the left main beam, the rear right guide beam is connected with the rear end of the right main beam, the front left guide beam and the front right guide beam are connected with a front auxiliary supporting device, the rear left guide beam and the rear right guide beam are connected with a rear auxiliary supporting device, the front auxiliary supporting device is used for temporarily supporting the front support device to ensure that the front support device can smoothly reach the front pier top support when the movable die frame passes through the hole, the rear auxiliary supporting device is used for temporarily supporting the movable die frame, the rear main support device passes through the hole by itself when the movable die frame passes through the hole, and the rear end of the main frame system temporarily supports and the upper walking structure is used for realizing the backward tilting stability of the movable die frame when the movable die frame passes through the hole.
Preferably, the highway prestressed concrete box girder movable mould frame further comprises two groups of hoisting electric hoists, and the electric hoists are arranged on the connecting beams of the main girders and used for installing and detaching the movable mould frame.
Preferably, the highway prestressed concrete box girder movable formwork comprises a hydraulic pump station, wherein the hydraulic pump station comprises an oil pump motor unit, a control electromagnetic valve group, an oil tank, an air filter and an oil return filter, and is provided with a pressure gauge and a liquid level liquid thermometer, and the hydraulic pump station is assembled with an oil cylinder in a supporting system and an outer rib system.
Preferably, the front main support device and the rear main support device comprise a triple valve pump station, two traversing cylinders, two longitudinal shifting cylinders and pipelines, wherein the two traversing cylinders are used for realizing the traversing motion of the main beam, the two longitudinal shifting cylinders are used for realizing the longitudinal shifting motion of the main beam, the two traversing cylinders are controlled by a reversing valve, the pipelines of the two traversing cylinders are connected in parallel, and a throttle valve is overlapped below the reversing valve and used for adjusting the speed of the traversing cylinders; each longitudinal moving oil cylinder is independently controlled by a reversing valve, a hydraulic lock is arranged on the oil cylinder and used for locking the oil cylinder and the main beam, and a throttle valve is overlapped below the reversing valve and used for adjusting the speed of the longitudinal moving oil cylinder.
Preferably, the left rotary oil cylinders in the outer rib system are twelve, the right rotary oil cylinders are twelve, the left rotary oil cylinders of the twelve are divided into two groups, the six front groups are controlled by one hydraulic pump station, the six rear groups are controlled by the other hydraulic pump station, the right rotary oil cylinders of the twelve are divided into two groups, the six front groups are controlled by one hydraulic pump station, the six rear groups are controlled by the other hydraulic pump station, the four hydraulic pump stations are all provided with an electromagnetic reversing valve, each group of left rotary oil cylinders are connected in parallel, pipelines are freely communicated in series, and ball valves are assembled on branch pipelines of the left rotary oil cylinders and the right rotary oil cylinders of each outer rib, so that the left rotary oil cylinders and the right rotary oil cylinders of single or multiple outer ribs can be locked according to use requirements; a throttle valve is overlapped under a reversing valve of a hydraulic pump station used for the left rotary oil cylinder and the right rotary oil cylinder and used for adjusting the speed of the left rotary oil cylinder and the right rotary oil cylinder, and a hydraulic lock is overlapped and used for locking the left rotary oil cylinder and the right rotary oil cylinder; two ball valves are arranged on the main pipeline of each group of left and right rotary cylinders, so that the pipelines and the cylinders can be closed when the pump station valve group is maintained, and the maintenance is convenient.
The method for carrying out concrete box girder overhanging construction by adopting the highway prestress concrete box girder movable mould frame comprises the following specific steps:
step one, assembling a movable die frame, and prepressing; supporting the adjustable upright post of the rear main supporting device of the movable die frame on a roadbed or a poured beam surface, supporting the adjustable upright post of the front main supporting device at the pier top of the first pier, and adjusting an outer rib system to enable the outer die system to be in place; binding a bottom plate, web steel bars, a vertical internal mold system, binding a top plate steel bar and pouring;
tensioning after the concrete reaches the strength, and preparing a via hole by the movable die frame; after the whole machine of the movable die frame passes through the holes, the movable die frame is integrally dropped, a main frame system is dropped on the longitudinal moving tracks of the front main supporting device and the rear main supporting device, and finish rolling deformed bars are removed; dismantling the connecting piece of the left bottom die and the right bottom die, dismantling the connecting piece of the left outer rib and the right outer rib, and then opening the left outer rib and the right outer rib in a rotating way by opening the left rotating cylinder and the right rotating cylinder; the door crane is operated to the rear ends of the left main beam and the right main beam;
anchoring the front main support device on the bridge deck, and longitudinally moving the movable die frame whole machine forwards; the front auxiliary supporting device reaches the front pier top and is supported at the pier top; note that: before passing through the hole, the front main support device is anchored with the bridge deck by using a chain block in the longitudinal and transverse directions;
step four, the main support device and the bridge deck are dismounted and anchored; the front main supporting device jacks up the whole machine of the movable die frame through a supporting oil cylinder and the rear auxiliary supporting device through a mechanical jack, and the rear main supporting device is suspended; note that: when the whole machine is jacked, the front main supporting device is jacked firstly, and then the rear auxiliary supporting device is jacked;
fifthly, the front main supporting device is emptied through an oil cylinder of a self hooking mechanism, and an adjustable upright post of the front main supporting device is pulled out from a concrete beam through a door hanger and hooked and forwards moves to a front pier top supporting and anchoring device; left and right support frames of the auxiliary support device before the emptying; left and right walking tracks of the auxiliary supporting device are paved on the bridge deck; the whole machine of the movable mould frame falls down, so that a left walking device and a right walking device of the left main beam, the right main beam and the rear auxiliary supporting device fall on a track; note that: the front main supporting device is sleeved with a protective sleeve before being supported by the front pier top;
step six, the whole machine of the movable die carrier moves to enable the through hole to be in place; folding the left outer rib, the right outer rib and the outer mold system through the left rotary oil cylinder and the right rotary oil cylinder, and installing bolts for fixation to prepare pouring; and finishing one-time construction process circulation.
The movable formwork provided by the invention can be used for bridge construction of a highway-railway combined building section, and can be used for bridge construction with larger cast-in-situ building span, wherein the bridge construction comprises the steps of main bridge initial pier, first pier installation, main bridge initial pier construction, eighth pier left width, backing to the main bridge initial pier, first pier transverse moving line turning to right width, main bridge initial pier construction, eighth pier right width, inner formwork system and outer rib system of the outer formwork system are removed at the eighth pier and seventh pier, and the main frame system is backing to the initial pier and removed at the second pier. The outer rib system and the outer die system adopt a rotary opening mode, the mode has few die opening actions and simple operation, the outer die can be opened and closed only by one stroke of the oil cylinder, the labor intensity is reduced, and the die opening efficiency is high. The whole machine line-turning luffing operation of the movable mould frame does not need to dismantle large parts. The movable formwork whole machine adopts a mode of opening molds with two ends rotating during the first construction, meets the construction requirement of a gate pier, and adopts a mode of rotating at the outer side and transversely moving at the inner side during the second construction, thereby meeting the double construction requirement. The front main supporting device, the front auxiliary supporting device, the rear main supporting device and the rear auxiliary supporting device can be automatically installed through Kong Jiuwei, so that the construction of a high-bridge high pier is facilitated, and the construction cost is greatly reduced; the device can be provided with a distributing machine, thereby being convenient for high pier construction; the lifting, rotary die opening and closing and the longitudinal movement of the movable die carrier are controlled by hydraulic pressure, so that the movable die carrier is stable in action, safe and reliable, the labor intensity is greatly reduced, and the construction efficiency is improved; the support legs are provided with the transverse shifting oil cylinders, so that the position of the main frame is convenient to adjust, and the curve through holes and the transverse shifting line operation are convenient to meet the requirement that the back end of the first span is free of roadbed and the existing beam surface construction; the whole machine is installed by adopting an integral lifting method, so that the construction method is suitable for high pier construction; the whole machine is integrally lowered when being dismantled, so that the whole machine is safe and convenient.
Description of the drawings:
fig. 1 is a schematic construction diagram of a construction state of a movable formwork of a highway prestressed concrete box girder.
FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1.
FIG. 3 is a schematic view of the cross-sectional structure B-B in FIG. 1.
FIG. 4 is a schematic view of the cross-sectional structure of C-C in FIG. 1.
FIG. 5 is a schematic view of the structure of section D-D in FIG. 1.
FIG. 6 is a schematic view of the structure of section E-E in FIG. 1.
In the figure: the front auxiliary supporting device 10, the supporting frame 101, the left supporting leg 102, the right supporting leg 103, the connecting beam 104, the left supporting cylinder 105, the right supporting cylinder 106, the front main supporting device 11, the front cross beam 111, the adjustable supporting upright 112, the rear main supporting device 12, the rear cross beam 121, the supporting upright 122, the rear auxiliary supporting device 13, the upright 131, the traveling wheel box 132, the main beam 20, the left main beam 201, the right main beam 202, the left outrigger 203, the right outrigger 204, the connecting beam 205, the front guide beam 21, the front left guide beam 211, the front right guide beam 212, the rear guide beam 22, the rear left guide beam 221, the rear right guide beam 222, the left outer rib 30, the left rotating cylinder 31, the right outer rib 32, the right rotating cylinder 33, the left side die 40, the left side die 41, the left side die 42, the right side die 43, the right side die 44, the right side die 45, the bottom die support 46, the left support 47, the right side support 48, the inner die system 50, the displacement trolley 60, the bracket 61, the hooking mechanism 62, the longitudinal displacement mechanism 63, the lateral displacement mechanism 64, the support 66, the longitudinal displacement mechanism 66, and the longitudinal displacement mechanism 66.
The specific embodiment is as follows:
the highway prestressed concrete box girder movable formwork comprises a supporting system, a main frame system, an outer rib system, an outer mold system and an inner mold system, wherein the supporting system is used for supporting and moving the main frame system, the main frame system is used for hanging the outer rib system, the outer mold system and the inner mold system, the outer rib system is used for supporting and controlling the opening and closing of the outer mold system, and the outer mold system is used for being bound with the inner mold system in a matching manner to pour the concrete box girder.
Referring to fig. 1, 2, 3, 4, 5 and 6, the support system includes a front auxiliary support device 10, a front main support device 11, a rear main support device 12 and a rear auxiliary support device 13, the main frame system includes a main beam 20, a front guide beam 21 and a rear guide beam 22, the front auxiliary support device 10 is assembled with the front guide beam 21 for supporting, the front main support device 11 is assembled at the front end of the main beam 20, the front main support device 11 is supported at the pier top of the pier, the rear main support device 12 is assembled at the rear end of the main beam 20, and the rear main support device 12 is supported on the roadbed or the poured beam surface, and the rear auxiliary support device 13 is assembled with the rear guide beam 22 as a whole; the outer rib system comprises a left outer rib 30, a left rotary cylinder 31, a right outer rib 32 and a right rotary cylinder 33, and the outer mold system comprises a left wing mold 40, a left belly mold 41, a left bottom mold 42, a right bottom mold 43, a right belly mold 44, a right wing mold 45, a bottom mold support 46, a left support 47 and a right support 48; the left outer rib 30 is hinged with the left side of the main beam 20 through a left rotary oil cylinder 31, and the right outer rib 32 is hinged with the right side of the main beam 20 through a right rotary oil cylinder 33; the left wing die 40 is connected with the left belly die 41, the left belly die 41 is connected with the left bottom die 42, the left bottom die 42 is connected with the right bottom die 43, the right bottom die 43 is connected with the right belly die 44, and the right belly die 45 is connected with the right wing die 45; the right outer rib 32 and the left outer rib 30 are connected with the left bottom die 42 and the right bottom die 43 through bottom die supporting pieces 46, the left outer rib 30 is connected with the left belly die 41 and the left wing die 40 through left supporting pieces 47, the right outer rib 32 is connected with the right belly die 44 and the right wing die 45 through right supporting pieces 48, and the inner die system 50 is assembled and bound on the left wing die 40, the left belly die 41, the left bottom die 42, the right bottom die 43, the right belly die 44 and the right wing die 45 of the outer die system.
The front auxiliary supporting device 10 comprises a supporting frame 101, a left supporting leg 102, a right supporting leg 103, a connecting cross beam 104, a left supporting cylinder 105 and a right supporting cylinder 106, wherein the supporting frame 101 is assembled at the upper ends of the left supporting leg 102 and the right supporting leg 103, the connecting cross beam 104 is connected with the left supporting leg 102 and the right supporting leg 103, the left supporting cylinder 105 is assembled with the bottom of the left supporting leg 102, and the right supporting cylinder 106 is assembled with the bottom of the right supporting leg 103.
The front main supporting device 11 comprises a shifting trolley 60, a front cross beam 111 and an adjustable supporting upright 112, the rear main supporting device 12 comprises a shifting trolley 60, a rear cross beam 121 and a supporting upright 122, the shifting trolley 60 comprises a bracket 61, a hooking mechanism 62, a longitudinal shifting mechanism 63, a transverse shifting mechanism 64, a supporting mechanism 65 and a longitudinal shifting slideway 66, the hooking mechanism 62 is provided with a hooking cylinder, the longitudinal shifting mechanism 63 is provided with a longitudinal shifting cylinder, the transverse shifting mechanism 64 is provided with a transverse shifting cylinder, the supporting mechanism 65 is provided with a supporting cylinder, and the hooking mechanism 62, the longitudinal shifting mechanism 63, the transverse shifting mechanism 64, the supporting mechanism 65 and the longitudinal shifting slideway 66 are provided on the bracket 61; the bracket 61 of the shifting trolley 60 of the front main supporting device 11 is assembled on the front cross beam 111, the adjustable supporting upright 112 is fixedly assembled with the front cross beam 111, the adjustable supporting upright 112 is supported on a pier top bridge deck, the bottom web at the front end of the main beam 20 and the lower chord of the front guide beam 21 are opposite to the longitudinal shifting slideway 66, the cylinder end of the longitudinal shifting cylinder is fixedly connected with the bracket 61, the rod end is connected with the web at the front end of the main beam 20 through a connecting lug seat, the cylinder end of the supporting cylinder is fixedly arranged on the bracket 61, the rod end is fixedly supported on the web at the front end of the main beam 20, the cylinder end of the transverse shifting cylinder is fixed on the bracket 61, the rod end is fixed on the front cross beam 111, and the transverse shifting cylinder is used for controlling the left and right movement of the front end of the main beam 20; the bracket 61 of the shifting trolley 60 of the rear main supporting device 12 is assembled on the rear cross beam 121, the supporting upright post 122 is assembled with the rear cross beam 121, the supporting upright post 122 is supported on a roadbed or a poured beam surface, a web plate at the bottom of the rear end of the main beam 20 and a lower chord of the rear guide beam 22 are opposite to a longitudinal shifting slideway, the cylinder end of the longitudinal shifting cylinder is fixedly connected with the bracket 61, the rod end is connected with the web plate at the rear end of the main beam 20 through a connecting lug seat, the cylinder end of the supporting cylinder is fixedly arranged on the bracket 61, the rod end is fixedly supported on the web plate at the rear end of the main beam 20, the cylinder end of the transverse shifting cylinder is fixed on the bracket 61, the rod end is fixed on the rear cross beam 121, and the transverse shifting cylinder is used for controlling the left and right movement of the rear end of the main beam 20.
The rear auxiliary supporting device 13 comprises a stand column 131, a traveling wheel box 132 and a spherical hinge, wherein the upper end of the stand column 131 is assembled with the rear guide beam 22, the lower end of the stand column is assembled with the traveling wheel box 132, the spherical hinge is assembled with the traveling wheel box 132, and the traveling wheel box 132 and the spherical hinge travel on a track laid on a bridge deck.
The main beam 20 comprises a left main beam 201, a right main beam 202, a left cantilever beam 203, a right cantilever beam 204 and a connecting beam 205, wherein the left main beam 201 is connected with the left cantilever beam 203, the right main beam 202 is connected with the right cantilever beam 204, the connecting beam 205 is connected between the left main beam 201 and the right main beam 202, the left outer rib 30 is hinged with the left cantilever beam 203 through a left rotary cylinder 31, and the right outer rib 32 is hinged with the right cantilever beam 204 through a right rotary cylinder 33; the front guide beam 21 comprises a front left guide beam 211 and a front right guide beam 212, the rear guide beam 22 comprises a rear left guide beam 221 and a rear right guide beam 222, the front left guide beam 211 is connected with the front end of the left main beam 201, the front right guide beam 212 is connected with the front end of the right main beam 202, the rear left guide beam 221 is connected with the rear end of the left main beam 201, the rear right guide beam 222 is connected with the rear end of the right main beam 202, the front left guide beam 211 and the front right guide beam 212 are connected with the front auxiliary supporting device 10, the rear left guide beam 221 and the rear right guide beam 222 are connected with the rear auxiliary supporting device 13, the front auxiliary supporting device 10 is used for being used as temporary support when the movable die frame passes through the hole, ensuring that the front main supporting device 11 can smoothly reach the front pier top support, the rear auxiliary supporting device 13 is used for being movable when the movable die frame passes through the hole, the rear main supporting device 12 can be used as temporary support and upper running structure of the rear supporting device, and the rear frame system can be used as temporary support and upper running structure of the rear end of the main frame system when the movable die frame passes through the hole, the movable die frame can be used for realizing the stability after the movable die frame.
The highway prestressed concrete box girder movable mould frame also comprises two groups of hoisting electric hoist which are arranged on the connecting beam of the main girder and used for installing and dismantling the movable mould frame.
The highway prestressed concrete box girder movable formwork comprises a hydraulic pump station, wherein the hydraulic pump station comprises an oil pump motor unit, a control electromagnetic valve group, an oil tank, an air filter and an oil return filter, and is provided with a pressure gauge and a liquid level thermometer, and the hydraulic pump station is assembled with an oil cylinder in a supporting system and an outer rib system.
The front main support device and the rear main support device comprise a triple valve pump station, two transverse moving oil cylinders, two longitudinal moving oil cylinders and pipelines, wherein the two transverse moving oil cylinders are used for realizing the transverse moving action of the main beam, the two longitudinal moving oil cylinders are used for realizing the longitudinal moving action of the main beam, the two transverse moving oil cylinders are controlled by a reversing valve, the pipelines of the two transverse moving oil cylinders are connected in parallel, and a throttle valve is overlapped below the reversing valve and used for adjusting the speed of the transverse moving oil cylinders; each longitudinal moving oil cylinder is independently controlled by a reversing valve, a hydraulic lock is arranged on the oil cylinder and used for locking the oil cylinder and the main beam, and a throttle valve is overlapped below the reversing valve and used for adjusting the speed of the longitudinal moving oil cylinder.
The left rotary cylinders in the outer rib system are twelve, the right rotary cylinders are twelve, the left rotary cylinders of the twelve are divided into two groups, the six front rotary cylinders are controlled by one hydraulic pump station, the six rear rotary cylinders are controlled by the other hydraulic pump station, the four hydraulic pump stations are all provided with an electromagnetic reversing valve, each group of left rotary cylinders are connected in parallel, pipelines are communicated in series freely, ball valves are assembled on branch pipelines of the left rotary cylinders and the right rotary cylinders of each outer rib, and the left rotary cylinders and the right rotary cylinders of a single or multiple outer ribs can be locked according to use requirements; a throttle valve is overlapped under a reversing valve of a hydraulic pump station used for the left rotary oil cylinder and the right rotary oil cylinder and used for adjusting the speed of the left rotary oil cylinder and the right rotary oil cylinder, and a hydraulic lock is overlapped and used for locking the left rotary oil cylinder and the right rotary oil cylinder; two ball valves are arranged on the main pipeline of each group of left and right rotary cylinders, so that the pipelines and the cylinders can be closed when the pump station valve group is maintained, and the maintenance is convenient.
The method for carrying out concrete box girder overhanging construction by adopting the highway prestress concrete box girder movable mould frame comprises the following specific steps:
step one, assembling a movable die frame, and prepressing; supporting the adjustable upright post of the rear main supporting device of the movable die frame on a roadbed or a poured beam surface, supporting the adjustable upright post of the front main supporting device at the pier top of the first pier, and adjusting an outer rib system to enable the outer die system to be in place; binding a bottom plate, web steel bars, a vertical internal mold system, binding a top plate steel bar and pouring;
tensioning after the concrete reaches the strength, and preparing a via hole by the movable die frame; after the whole machine of the movable die frame passes through the holes, the movable die frame is integrally dropped, a main frame system is dropped on the longitudinal moving tracks of the front main supporting device and the rear main supporting device, and finish rolling deformed bars are removed; dismantling the connecting piece of the left bottom die and the right bottom die, dismantling the connecting piece of the left outer rib and the right outer rib, and then opening the left outer rib and the right outer rib in a rotating way by opening the left rotating cylinder and the right rotating cylinder; the door crane is operated to the rear ends of the left main beam and the right main beam;
anchoring the front main support device on the bridge deck, and longitudinally moving the movable die frame whole machine forwards; the front auxiliary supporting device reaches the front pier top and is supported at the pier top; note that: before passing through the hole, the front main support device is anchored with the bridge deck by using a chain block in the longitudinal and transverse directions;
step four, the main support device and the bridge deck are dismounted and anchored; the front main supporting device jacks up the whole machine of the movable die frame through a supporting oil cylinder and the rear auxiliary supporting device through a mechanical jack, and the rear main supporting device is suspended; note that: when the whole machine is jacked, the front main supporting device is jacked firstly, and then the rear auxiliary supporting device is jacked;
fifthly, the front main supporting device is emptied through an oil cylinder of a self hooking mechanism, and an adjustable upright post of the front main supporting device is pulled out from a concrete beam through a door hanger and hooked and forwards moves to a front pier top supporting and anchoring device; left and right support frames of the auxiliary support device before the emptying; left and right walking tracks of the auxiliary supporting device are paved on the bridge deck; the whole machine of the movable mould frame falls down, so that a left walking device and a right walking device of the left main beam, the right main beam and the rear auxiliary supporting device fall on a track; note that: the front main supporting device is sleeved with a protective sleeve before being supported by the front pier top;
step six, the whole machine of the movable die carrier moves to enable the through hole to be in place; folding the left outer rib, the right outer rib and the outer mold system through the left rotary oil cylinder and the right rotary oil cylinder, and installing bolts for fixation to prepare pouring; and finishing one-time construction process circulation.
The whole movable die carrier provided by the invention adopts a two-span double-guide beam structure form, and the bearing of the front and rear main supporting devices tends to be uniform in the pouring process of the form; when the large cantilever is longitudinally moved, the anti-overturning stability is strong. The outer mold system is opened and closed in a rotary opening mode, so that the opening operation is few, the operation is simple, and the outer mold can be opened and closed only by one stroke of the oil cylinder; reduces labor intensity and has high die opening efficiency. The whole machine line-turning luffing operation of the movable mould frame does not need to dismantle large parts. The movable formwork whole machine adopts a mode of opening molds with two ends rotating during the first construction, meets the construction requirement of a gate pier, and adopts a mode of rotating at the outer side and transversely moving at the inner side during the second construction, thereby meeting the double construction requirement. The front main supporting device, the front auxiliary supporting device, the rear main supporting device and the rear auxiliary supporting device can be automatically installed through Kong Jiuwei, so that the construction of a high-bridge high pier is facilitated, and the construction cost is greatly reduced; the device can be provided with a distributing machine, thereby being convenient for high pier construction; the lifting, rotary die opening and closing and the longitudinal movement of the movable die carrier are controlled by hydraulic pressure, so that the movable die carrier is stable in action, safe and reliable, the labor intensity is greatly reduced, and the construction efficiency is improved; the support legs are provided with the transverse shifting oil cylinders, so that the position of the main frame is convenient to adjust, and the curve through holes and the transverse shifting line operation are convenient to meet the requirement that the back end of the first span is free of roadbed and the existing beam surface construction; the whole machine is installed by adopting an integral lifting method, so that the construction method is suitable for high pier construction; the whole machine is integrally lowered when being dismantled, so that the whole machine is safe and convenient.
Claims (8)
1. The utility model provides a highway prestressing force concrete case roof beam movable mould frame which characterized in that: the highway prestressed concrete box girder movable formwork comprises a supporting system, a main frame system, an outer rib system, an outer mold system and an inner mold system, wherein the supporting system is used for supporting and moving the main frame system, the main frame system is used for hanging the outer rib system, the outer mold system and the inner mold system, the outer rib system is used for supporting and controlling the opening and closing of the outer mold system, and the outer mold system is used for being bound with the inner mold system in a matching way to perform pouring of the concrete box girder;
the support system comprises a front auxiliary support device, a front main support device, a rear main support device and a rear auxiliary support device, wherein the main frame system comprises a main beam, a front guide beam and a rear guide beam, the front auxiliary support device and the front guide beam are assembled into a whole for supporting, the front main support device is assembled at the front end of the main beam, the front main support device is supported at the pier top of a pier, the rear main support device is assembled at the rear end of the main beam, the rear main support device is supported on a roadbed or a poured beam surface, and the rear auxiliary support device and the rear guide beam are assembled into a whole; the outer rib system comprises a left outer rib, a left rotary oil cylinder, a right outer rib and a right rotary oil cylinder, and the outer mold system comprises a left wing mold, a left belly mold, a left bottom mold, a right belly mold, a right wing mold, a bottom mold supporting piece, a left supporting piece and a right supporting piece; the left outer rib is hinged with the left side of the main beam through a left rotary oil cylinder, and the right outer rib is hinged with the right side of the main beam through a right rotary oil cylinder; the left wing die is connected with the left belly die, the left belly die is connected with the left bottom die, the left bottom die is connected with the right bottom die, the right bottom die is connected with the right belly die, and the right belly die is connected with the right wing die; the right outer rib and the left outer rib are connected with the left bottom die and the right bottom die through bottom die supporting pieces, the left outer rib is connected with the left belly die and the left wing die through left supporting pieces, the right outer rib is connected with the right belly die and the right wing die through right supporting pieces, and the inner die system is assembled and bound on the outer die system;
the front main support device comprises a shifting trolley, a front cross beam and an adjustable support column, the rear main support device comprises a shifting trolley, a rear cross beam and a support column, the shifting trolley comprises a bracket, a hooking mechanism, a longitudinal shifting mechanism, a transverse shifting mechanism, a support mechanism and a longitudinal shifting slideway, the hooking mechanism is provided with a hooking oil cylinder, the longitudinal shifting mechanism is provided with a longitudinal shifting oil cylinder, the transverse shifting mechanism is provided with a transverse shifting oil cylinder, the support mechanism is provided with a support oil cylinder, and the hooking mechanism, the longitudinal shifting mechanism, the transverse shifting mechanism, the support mechanism and the longitudinal shifting slideway are provided with brackets; the bracket of the shifting trolley of the front main supporting device is assembled on the front cross beam, the adjustable supporting upright post is fixedly assembled with the front cross beam, the adjustable supporting upright post is supported on the pier top bridge deck, the bottom web plate at the front end of the main beam and the lower chord member of the front guide beam are opposite to the longitudinal shifting slideway, the cylinder end of the longitudinal shifting cylinder is fixedly connected with the bracket, the rod end is connected with the web plate at the front end of the main beam through a connecting lug seat, the cylinder end of the supporting cylinder is fixedly arranged on the bracket, the rod end is fixedly supported on the web plate at the front end of the main beam, the cylinder end of the transverse shifting cylinder is fixed on the bracket, the rod end of the transverse shifting cylinder is used for controlling the left and right movement of the bracket, and thus the left and right movement of the main beam is controlled; the support of the shifting trolley of the rear main supporting device is assembled on the rear cross beam, the supporting upright post is assembled with the rear cross beam, the supporting upright post is supported on a roadbed or a poured beam surface, a web plate at the bottom of the rear end of the main beam and a lower chord of the rear guide beam are opposite to a longitudinal shifting slideway, the cylinder end of the longitudinal shifting cylinder is fixedly connected with the bracket, the rod end is connected with the web plate at the rear end of the main beam through a connecting lug seat, the cylinder end of the supporting cylinder is fixedly arranged on the bracket, the rod end is fixedly supported on the web plate at the rear end of the main beam, the cylinder end of the transverse shifting cylinder is fixedly arranged on the bracket, and the rod end of the transverse shifting cylinder is used for controlling the left and right movement of the bracket so as to control the left and right movement of the main beam;
the main beams comprise a left main beam, a right main beam, a left cantilever beam, a right cantilever beam and a connecting beam, wherein the left main beam is connected with the left cantilever beam, the right main beam is connected with the right cantilever beam, the connecting beam is connected between the left main beam and the right main beam, the left outer rib is hinged with the left cantilever beam through a left rotary oil cylinder, and the right outer rib is hinged with the right cantilever beam through a right rotary oil cylinder; the front guide beam comprises a front left guide beam and a front right guide beam, the rear guide beam comprises a rear left guide beam and a rear right guide beam, the front left guide beam is connected with the front end of the left main beam, the front right guide beam is connected with the front end of the right main beam, the rear left guide beam is connected with the rear end of the left main beam, the rear right guide beam is connected with the rear end of the right main beam, the front left guide beam and the front right guide beam are connected with a front auxiliary supporting device, the rear left guide beam and the rear right guide beam are connected with a rear auxiliary supporting device, the front auxiliary supporting device is used for temporarily supporting the front support device to ensure that the front support device can smoothly reach the front pier top support when the movable die frame passes through the hole, the rear auxiliary supporting device is used for temporarily supporting the movable die frame to realize self-passing of the rear main support device, and the rear end temporary support and upward walking structure of the main frame system when the movable die frame passes through the hole, and the movable die frame can realize the stability of the movable die frame after tilting operation.
2. The highway prestressed concrete box girder moving mold frame of claim 1, wherein: the front auxiliary supporting device comprises a supporting frame, a left supporting leg, a right supporting leg, a connecting beam, a left supporting oil cylinder and a right supporting oil cylinder, wherein the supporting frame is assembled at the upper ends of the left supporting leg and the right supporting leg, the connecting beam is connected with the left supporting leg and the right supporting leg, the left supporting oil cylinder is assembled with the bottom of the left supporting leg, and the right supporting oil cylinder is assembled with the bottom of the right supporting leg.
3. The highway prestressed concrete box girder moving mold frame of claim 1, wherein: the rear auxiliary supporting device comprises a stand column, a running wheel box and a spherical hinge, wherein the upper end of the stand column is assembled with the rear guide beam, the lower end of the stand column is assembled with the running wheel box, the spherical hinge is assembled with the running wheel box, and the running wheel box and the spherical hinge run on a track laid on a bridge deck.
4. The highway prestressed concrete box girder moving mold frame of claim 1, wherein: the highway prestressed concrete box girder movable mould frame also comprises two groups of hoisting electric hoist which are arranged on the connecting beam of the main girder and used for installing and dismantling the movable mould frame.
5. The highway prestressed concrete box girder moving mold frame of claim 1, wherein: the highway prestressed concrete box girder movable mould frame comprises a hydraulic pump station, wherein the hydraulic pump station comprises an oil pump motor unit, a control electromagnetic valve group, an oil tank, an air filter and an oil return filter, and is provided with a pressure gauge and a liquid level thermometer, and the hydraulic pump station is assembled with an oil cylinder in a supporting system and an outer rib system.
6. The highway prestressed concrete box girder moving mold frame of claim 1, wherein: the front main support device and the rear main support device comprise a triple valve pump station, two transverse moving oil cylinders, two longitudinal moving oil cylinders and pipelines, wherein the two transverse moving oil cylinders are used for realizing the transverse moving action of the main beam, the two longitudinal moving oil cylinders are used for realizing the longitudinal moving action of the main beam, the two transverse moving oil cylinders are controlled by a reversing valve, the pipelines of the two transverse moving oil cylinders are connected in parallel, and a throttle valve is overlapped below the reversing valve and used for adjusting the speed of the transverse moving oil cylinders; each longitudinal moving oil cylinder is independently controlled by a reversing valve, a hydraulic lock is arranged on the oil cylinder and used for locking the oil cylinder and the main beam, and a throttle valve is overlapped below the reversing valve and used for adjusting the speed of the longitudinal moving oil cylinder.
7. The highway prestressed concrete box girder moving mold frame of claim 1, wherein: the left rotary oil cylinders in the outer rib system are twelve, the right rotary oil cylinders are twelve, the left rotary oil cylinders of the twelve are divided into two groups, the front six are controlled by one hydraulic pump station, the rear half of the left rotary oil cylinders are controlled by the other hydraulic pump station, the front six are controlled by one hydraulic pump station, the rear half of the left rotary oil cylinders are controlled by one hydraulic pump station, the twelve are divided into two groups, the front six are controlled by one hydraulic pump station and the rear half of the left rotary oil cylinders are controlled by one hydraulic pump station, one electromagnetic reversing valve is respectively arranged, each group of left rotary oil cylinders are connected in parallel, the pipelines are communicated freely, and ball valves are arranged on branch pipelines of the left rotary oil cylinders and the right rotary oil cylinders of each outer rib, so that the left rotary oil cylinders and the right rotary oil cylinders of each outer rib can be locked according to use requirements; a throttle valve is overlapped under a reversing valve of a hydraulic pump station used for the left rotary oil cylinder and the right rotary oil cylinder and used for adjusting the speed of the left rotary oil cylinder and the right rotary oil cylinder, and a hydraulic lock is overlapped and used for locking the left rotary oil cylinder and the right rotary oil cylinder; two ball valves are arranged on the main pipeline of each group of left and right rotary cylinders, so that the pipelines and the cylinders can be closed when the pump station valve group is maintained, and the maintenance is convenient.
8. A method for carrying out cantilever construction on a concrete box girder by adopting the highway prestressed concrete box girder movable mould frame as claimed in claim 1, which is characterized in that: the concrete box girder overhanging construction method by adopting the highway prestressed concrete box girder movable mould frame comprises the following specific steps:
step one, assembling a movable die frame, and prepressing; the adjustable upright post of the rear main supporting device of the movable die frame is supported on a roadbed or a poured beam surface, the adjustable upright post of the front main supporting device is supported at the pier top of the first pier, and the outer rib system is adjusted to enable the outer die system to be in place; binding a bottom plate, web steel bars, a vertical internal mold system, binding a top plate steel bar and pouring;
tensioning after the concrete reaches the strength, and preparing a via hole by the movable die frame; after the whole machine of the movable die frame passes through the holes, the movable die frame is integrally dropped, a main frame system is dropped on the longitudinal moving tracks of the front main supporting device and the rear main supporting device, and finish rolling deformed bars are removed; dismantling the connecting piece of the left bottom die and the right bottom die, dismantling the connecting piece of the left outer rib and the right outer rib, and then opening the left outer rib and the right outer rib in a rotating way by opening the left rotating oil cylinder and the right rotating oil cylinder; the door crane is operated to the rear ends of the left main beam and the right main beam;
anchoring the front main support device on the bridge deck, and longitudinally moving the movable die frame whole machine forwards; the front auxiliary supporting device reaches the front pier top and is supported at the pier top; note that: before passing through the hole, the front main support device is anchored with the bridge deck by using a chain block in the longitudinal and transverse directions;
step four, the main support device and the bridge deck are dismounted and anchored; the front main supporting device jacks up the whole machine of the movable die frame through a supporting oil cylinder and the rear auxiliary supporting device through a mechanical jack, and the rear main supporting device is suspended; note that: when the whole machine is jacked, the front main supporting device is jacked firstly, and then the rear auxiliary supporting device is jacked;
fifthly, the front main supporting device is emptied through an oil cylinder of a self hooking mechanism, and an adjustable upright post of the front main supporting device is pulled out from a concrete beam through a door hanger and hooked and forwards moves to a front pier top supporting and anchoring device; left and right support frames of the auxiliary support device before the emptying; left and right walking tracks of the auxiliary supporting device are paved on the bridge deck; the whole machine of the movable mould frame falls down to enable a left walking device and a right walking device of the left and right main beams and the rear auxiliary supporting device to fall on the track; note that: the front main supporting device is sleeved with a protective sleeve before being supported by the front pier top;
step six, the whole machine of the movable die carrier moves to enable the through hole to be in place; folding the left outer rib, the right outer rib and the outer mold system through the left rotary oil cylinder and the right rotary oil cylinder, and installing bolts for fixation to prepare pouring; and finishing one-time construction process circulation.
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| CN112064505A (en) * | 2020-03-31 | 2020-12-11 | 中铁大桥局集团第二工程有限公司 | Amplitude-variable type movable support and construction method thereof |
| CN111996916A (en) * | 2020-08-04 | 2020-11-27 | 中交第二航务工程局有限公司 | Cast-in-place box girder integrated construction equipment and construction method thereof |
| CN112746564A (en) * | 2020-12-31 | 2021-05-04 | 中铁二十局集团第六工程有限公司 | Movable formwork assembling method |
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