Double-amplitude cast-in-place box girder formwork
By designing a double-span cast-in-place box girder formwork, and adopting a separate design for the main beam system and the inner and outer formwork systems, the problem of difficult formwork erection for double-span cast-in-place box girders in the later construction stage was solved, realizing rapid construction and efficient formwork movement, and adapting to various site conditions.
Patent Information
- Application Number
- CN202422928523.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In the existing technology, the formwork for the double-span cast-in-place box girder cannot be built using a movable formwork, which results in time-consuming and labor-intensive construction, and the full-span scaffolding method is not suitable for some sites.
A double-span cast-in-place box girder formwork was designed, including a main beam system, a suspension system, and an inner and outer formwork system. By dividing the movable formwork into a main body and an inner and outer formwork system, separate passages are achieved. Through the cooperation of the suspension system and the inner and outer formwork systems, the formwork can be quickly erected and moved.
It enables rapid construction of double-span cast-in-place box girders, improves construction efficiency, avoids the shortcomings of the full-span scaffolding method, and adapts to various site environments.
Smart Images
Figure CN223607748U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge building equipment technical field, concretely relates to a double -wide cast -in -situ box girder mould frame. BACKGROUND
[0002] When carrying out cast-in-situ concrete box girder construction, the commonly used formwork erection methods are full-support erection and mobile mould frame erection. Full-support erection needs to erect full-support at the bottom of the bridge. Although this method can provide better support for the formwork, it needs to harden the lower part of the bridge in a large area, requires higher bearing capacity of the foundation, and after the construction is completed, the support needs to be removed hole by hole, which is extremely large in on-site operation amount. Mobile mould frame erection supports the main beam on the poured box girder and pier through the support leg, suspends the mould frame on the main beam through the cross beam, moves the mould frame to the left and right sides of the poured box girder after pouring and curing, opens the mould, avoids the front pier, and then moves the mould frame as a whole through the jacking mechanism to pass through the hole. This construction method does not need to harden the ground under the bridge, avoids repeated erection and removal of the support, reduces the construction cost and shortens the construction period. However, for double-width cast-in-situ box girders, the box girder constructed first can use the above-mentioned mobile mould frame to erect the formwork, but the box girder constructed later cannot use the above-mentioned mobile mould frame to erect the formwork due to the obstruction of the box girder constructed first, and still needs to use full-support to erect the mould frame, which is time-consuming and laborious. CONTENT OF THE UTILITY MODEL
[0003] The utility model aims at overcoming the defects in the prior art, and provides a double-width cast-in-situ box girder mould frame to solve the problem that the mould frame of the box girder constructed later in the double-width cast-in-situ box girder cannot use the mobile mould frame to erect.
[0004] To solve the above problems, the utility model provides a double-width cast-in-situ box girder mould frame, characterized by comprising a main beam system, a suspension system and an inner and outer mould frame system.
[0005] The main beam system comprises two groups of main beams and a transverse connecting piece, the two groups of main beams are located on the same horizontal plane and are axially parallel, and the two groups of main beams are connected through the transverse connecting piece.
[0006] The suspension system has several groups, each group of suspension system comprises a cross beam, a hanging beam connecting arm and a hanging beam, the cross beam, the hanging beam connecting arm and the hanging beam are located on the same cross section, the cross beam penetrates and is fixed on the two groups of main beams, and the cross beam is perpendicular to the main beam, one end of the hanging beam connecting arm is fixedly connected with one end of the cross beam, the hanging beam is located below the main beam system, and one end of the hanging beam is hingedly connected with the other end of the hanging beam connecting arm.
[0007] The inner side formwork system is arranged below the main beam system along the length direction of the main beam system, and the other end of the hanging beam is detachably connected with the inner side formwork system.
[0008] The double-width cast-in-place box girder formwork further comprises a box girder outer form (6), the box girder outer form (6) comprises an outer form outer side wing formwork, an outer form outer side side wall formwork, an outer form bottom formwork, an outer form inner side side wall formwork, an outer form inner side wing formwork and a plurality of adjustable supporting rods, the outer form outer side wing formwork, the outer form outer side side wall formwork, the outer form bottom formwork, the outer form inner side side wall formwork and the outer form inner side wing formwork are sequentially connected to form an outer membrane of a pre-cast box girder, the outer form outer side wing formwork is fixedly connected with the outer form outer side side wall formwork, the outer form outer side wing formwork and the outer form outer side side wall formwork are connected with the hanging beam connecting arm through the adjustable supporting rods, the outer form outer side side wall formwork is detachably connected with the outer form bottom formwork, the outer form bottom formwork is fixedly connected with the hanging beam, the outer form bottom formwork is detachably connected with the outer form inner side side wall formwork, the outer form inner side side wall formwork is fixedly connected with the outer form inner side wing formwork, and the outer form inner side side wall formwork and the outer form inner side wing formwork are connected with the inner side formwork system through the adjustable supporting rods.
[0009] The hanging beam connecting arm further comprises a reinforcing arm, the reinforcing arm is arranged below the cross beam and is inclined to the vertical arm, one end of the reinforcing arm is fixedly connected with the cross beam, and the other end of the reinforcing arm is fixedly connected with the vertical arm.
[0010] The hanging beam connecting arm further comprises a reinforcing arm, the reinforcing arm is arranged below the cross beam and is inclined to the vertical arm, one end of the reinforcing arm is fixedly connected with the cross beam, and the other end of the reinforcing arm is fixedly connected with the vertical arm.
[0011] The double-width cast-in-place box girder formwork has the characteristics that the inner-outer formwork system comprises an inner-outer formwork small main girder, a small main girder supporting oil cylinder and a pier top trolley, the inner-outer formwork small main girder is arranged below the inner side flange of the pre-cast box girder along the length direction of the pre-cast box girder, the small main girder supporting oil cylinder is connected with the inner-outer formwork small main girder and used for supporting the inner-outer formwork small main girder on the pier top, and the pier top trolley is connected with the inner-outer formwork small main girder and used for pushing the inner-outer formwork small main girder to pass through the pier top hole.
[0012] The double-width cast-in-place box girder formwork has the characteristics that the inner-outer formwork system further comprises an inner side frame girder and an inner-outer formwork transverse moving girder, the inner side frame girder is connected with the inner-outer formwork small main girder, and the inner side frame girder is used for connecting the inner-outer formwork small main girder and the hanging girder, and the inner-outer formwork transverse moving girder is arranged below the inner-outer formwork small main girder and used for adjusting the transverse position of the inner-outer formwork small main girder when passing through the hole.
[0013] The double-width cast-in-place box girder formwork has the characteristics that the inner-outer formwork transverse moving girder comprises a base, a sliding base and an adjusting oil cylinder, the sliding base is installed on the base, one end of the adjusting oil cylinder is connected with the base, the other end of the adjusting oil cylinder is connected with the sliding base, the adjusting oil cylinder is used for pushing the sliding base to move left and right on the base, the inner-outer formwork small main girder is arranged on the sliding base, and the inner-outer formwork small main girder is slidably connected with the sliding base.
[0014] The double-width cast-in-place box girder formwork has the characteristics that the double-width cast-in-place box girder formwork further comprises a main girder rear supporting point structure, the main girder rear supporting point structure is arranged at the rear part of the main girder system and used for supporting the main girder system above the cast-in-place box girder,
[0015] The main beam rear support point structure comprises a guide rail, a transverse beam, a guide rail sliding seat, a rotating shaft, a sliding groove, a sliding support, a transverse oil cylinder, a main beam connecting beam and a longitudinal oil cylinder, the guide rail is laid on the cast box girder along the length direction of the cast box girder, the transverse beam is horizontally arranged on the cast box girder along the transverse direction of the cast box girder, the guide rail sliding seat is arranged below the transverse beam, the transverse beam is slidingly installed on the guide rail through the guide rail sliding seat, the longitudinal oil cylinder is parallel to the guide rail, one end of the longitudinal oil cylinder is connected with the guide rail, the other end of the longitudinal oil cylinder is connected with the guide rail sliding seat and used for pushing the guide rail sliding seat to move along the guide rail, the sliding groove is arranged on the transverse beam, the number of the sliding grooves corresponds to the number of the main beams, and the sliding grooves are located below the corresponding main beams, the sliding support is located between two adjacent sliding grooves, the sliding support is slidingly installed on the transverse beam along the left-right direction, one end of the transverse oil cylinder is connected with the sliding support, the other end of the transverse oil cylinder is connected with the transverse beam, the axis of the transverse oil cylinder is parallel to the length direction of the transverse beam, and the transverse oil cylinder is used for pushing the sliding support to move along the length direction of the transverse beam, the main beam connecting beam is horizontally arranged between two main beams, and the two ends of the main beam connecting beam are respectively fixed on the corresponding main beams on the same side through bolts, the rotating shaft is vertically arranged, the upper end of the rotating shaft is rotatably installed on the middle part of the main beam connecting beam, and the lower end of the rotating shaft is fixed on the sliding support.
[0016] The double-width cast-in-place box girder formwork has the following characteristics: the double-width cast-in-place box girder formwork further comprises a first pull rod and a second pull rod, one end of the first pull rod is detachably connected with the cross beam, the other end of the first pull rod is detachably connected with the hanging beam close to one end of the hanging beam connecting arm, one end of the second pull rod is detachably connected with the cross beam, and the other end of the second pull rod is detachably connected with the hanging beam close to one end of the inner-outer formwork system.
[0017] Compared with the prior art, the mobile formwork has the following advantages:
[0018] The mobile formwork is divided into two parts, namely a main body part and an inner-outer formwork system, the main body part and the inner-outer formwork system can realize independent through holes, and the outer membrane of the box girder to be cast can be quickly built by connection after the through holes, the inner curtain is hoisted into the outer membrane of the box girder to be cast by the main body part, the formwork can be quickly built, and the construction efficiency is improved.
[0019] The utility model will be described in further detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0020] The drawings constituting a part of the specification of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof serve to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0021] Figure 1 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0022] Figure 2 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0023] Figure 3 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0024] Figure 4 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0025] Figure 5 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0026] Figure 6 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0027] Figure 7 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0028] Figure 8 It is the structural schematic view of the rear end main beam rear support point structure of the main beam system on the bridge.
[0029] Explanation of reference signs:
[0030] 1 - main beam; 2 - cross beam; 3 - hanging beam connecting arm; 31 - vertical arm;
[0031] 32 - inclined arm; 33 - folding oil cylinder; 34 - folding oil cylinder supporting leg; 35 - reinforcing arm;
[0032] 4 - hanging beam; 5 - inside and outside formwork system; 51 - inside and outside formwork small main beam;
[0033] 52 - small main beam supporting oil cylinder; 54 - inside frame beam; 55 - inside and outside formwork transverse beam; 55-1 - base; 55-2 - sliding base; 55-3 - adjusting oil cylinder 6 - box beam formwork;
[0034] 61 - formwork outside wing formwork; 62 - formwork outside side wall formwork; 63 - formwork bottom formwork;
[0035] 64 - inner side wall formwork of outer form; 65 - inner side wing formwork of outer form; 66 - adjustable support rod;
[0036] 71 - guide rail; 72 - transverse beam; 73 - guide rail slide; 74 - pivot shaft;
[0037] 75 - sliding groove; 76 - sliding support; 77 - transverse moving oil cylinder; 78 - main beam connecting beam; 81 - first pull rod; 82 - second pull rod. DETAILED DESCRIPTION
[0038] The technical solutions in the embodiments of the utility model will be apparently and completely described in the embodiments of the utility model combined with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of at least one exemplary embodiment is only illustrative in nature rather than as any limitation to the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.
[0039] As shown in Figure 1 , Figure 5 and Figure 6 , for double-width bridge, the box girder on one side needs to be poured first during construction, and then the box girder on the other side is poured. After the pouring of the first box girder, the space between the poured box girder and the poured box girder is extremely limited, and the existing movable formwork cannot be constructed. Therefore, when pouring the box girder on the existing double-width bridge, it is necessary to use the full-support method, which not only consumes time and effort, but also some site environment is not suitable for the full-support method. In order to solve the problems in the prior art, the embodiment provides a double-width cast-in-place box girder formwork, which comprises a main beam system, a suspension system and an inner and outer formwork system 5; the main beam system comprises two groups of main beams 1 and transverse connecting pieces, the two groups of main beams 1 are located on the same horizontal plane, and the two groups of main beams 1 are axially parallel, and the two groups of main beams 1 are connected through the transverse connecting pieces; the suspension system has several groups, each group of the suspension system comprises a cross beam 2, a hanging beam connecting arm 3 and a hanging beam 4, the cross beam 2, the hanging beam connecting arm 3 and the hanging beam 4 are located on the same cross section, the cross beam 2 passes through and is fixed on the two groups of main beams 1, and the cross beam 2 is perpendicular to the main beams 1, one end of the hanging beam connecting arm 3 is fixedly connected with one end of the cross beam 2, the hanging beam 4 is located below the main beam system, and the other end of the hanging beam 4 is hingedly connected with the other end of the hanging beam connecting arm 3; the inner and outer formwork system 5 is arranged below the main beam system along the length direction of the main beam system, and the other end of the hanging beam 4 is detachably connected with the inner and outer formwork system 5.
[0040] The double-width cast-in-place box girder formwork in the embodiment divides the movable formwork into two parts, which are the main part and the inner side outer formwork system 5. The main part includes the main beam system and the suspension system. The main beam system is similar to the existing movable formwork system in structure and function, including the main beam, the nose beam, the front support leg, the middle support leg, the rear support, the longitudinal movement mechanism, etc. The main beam and the nose beam are supported on the pier and the cast-in-place box girder through the front support leg, the middle support leg, and the rear support. The longitudinal movement mechanism pushes the main beam system to move longitudinally through the hole. The suspension system is connected with the main beam system and is used to install the outer membrane of the box girder. The suspension system is driven to move longitudinally through the hole by the longitudinal movement of the main beam system, and then the outer membrane of the box girder is driven to move longitudinally through the hole. In order to adapt to the double-width cast-in-place box girder structure, the suspension system in the embodiment is different from the bridge builder in the prior art, and a cantilever structure connected on one side is adopted. When passing through the hole, the hanging beam 4 can be inverted to the outside, and the entire bottom mold of the outer membrane of the box girder is inverted to the outside of the pier, leaving a space required for passing through the hole to realize the passing through the hole. The inner side outer formwork system 5 in the embodiment can realize independent passing through the hole. When pouring, the end of the hanging beam 4 suspended in the air is connected with the inner side outer formwork system 5. The inner side outer formwork system 5 is supported on the top of the pier by the supporting oil cylinder and is moved through the hole by the outer formwork system longitudinal movement mechanism. The outer formwork system longitudinal movement mechanism includes the pier top trolley and the inner side outer form transverse beam 55. The pier top trolley is similar to the longitudinal movement mechanism of the movable formwork in the prior art. When the inner side outer formwork system 5 moves longitudinally, one end of the pier top trolley acts on the top of the pier, and the other end pushes the inner side outer form small main beam 51 of the inner side outer formwork system 5 to move longitudinally through the hole along the inner side outer form transverse beam 55 arranged on the top of the pier. Therefore, the double-width cast-in-place box girder formwork in the embodiment can effectively improve the construction efficiency and solve the problem of difficulty in erecting the formwork for pouring the rear box girder in the prior art by independent passing through the hole and rapid splicing of the main part and the inner side outer formwork system 5.
[0041] As Figures 5 to 8As shown, in this embodiment, the double-span cast-in-place box girder formwork also includes an outer box girder formwork 6. The outer box girder formwork 6 includes an outer wing template 61, an outer sidewall template 62, a bottom template 63, an inner sidewall template 64, an inner wing template 65, and multiple adjustable support rods 66. The outer wing template 61, outer sidewall template 62, bottom template 63, inner sidewall template 64, and inner wing template 65 are sequentially connected to form the outer membrane of the precast box girder. The outer wing template 61 and the outer sidewall template 62 are fixedly connected. The outer wing template 61 and the outer sidewall template 62 of the outer mold are connected to the hanging beam connecting arm 3 via adjustable support rods 66. The outer sidewall template 62 and the bottom template 63 of the outer mold are detachably connected. The bottom template 63 of the outer mold is fixedly connected to the hanging beam 4. The bottom template 63 of the outer mold is detachably connected to the inner sidewall template 64 of the outer mold. The inner sidewall template 64 of the outer mold is fixedly connected to the inner wing template 65 of the outer mold. The inner sidewall template 64 and the inner wing template 65 of the outer mold are connected to the inner outer mold frame system 5 via adjustable support rods 66.
[0042] like Figures 5 to 8 As shown, in this embodiment, the hanging beam connecting arm 3 includes a vertical arm 31, an inclined arm 32, a folding hydraulic cylinder 33, and a folding hydraulic cylinder support leg 34. The upper end of the vertical arm 31 is connected to the crossbeam 2, and the vertical arm 31 is located on the outer side of the flange of the precast box girder. The lower end of the vertical arm 31 is located below the flange of the precast box girder. One end of the inclined arm 32 is fixedly connected to the lower end of the vertical arm 31, and the other end of the inclined arm 32 is inclined towards the side closer to the precast box girder. The folding hydraulic cylinder support leg 34 is located below the other end of the inclined arm 32, and one end of the folding hydraulic cylinder support leg 34 is fixedly connected to the inclined arm 32. The other end of the inclined arm 32 is hinged to the hanging beam 4. One end of the folding hydraulic cylinder 33 is hinged to the other end of the folding hydraulic cylinder support leg 34. The other end of the folding hydraulic cylinder 33 is hinged to the hanging beam 4 and is used to push the hanging beam 4 to rotate along the hinge axis between the hanging beam 4 and the inclined arm 32.
[0043] In this embodiment, the lower end of the vertical arm 31 is located below the flange of the precast box girder, and the inclined arm 32 is inclined to the side closer to the precast box girder; when the hanging beam 4 is folded outward through the hole, the center of gravity of the suspension system can be brought as close as possible to the center of the main beam system, thus improving the stability of the hole.
[0044] like Figures 5 to 8 As shown, in this embodiment, the beam connecting arm 3 also includes a reinforcing arm 35. The reinforcing arm 35 is located below the crossbeam 2 and is inclined to the vertical arm 31. One end of the reinforcing arm 35 is connected to the crossbeam 2, and the other end of the reinforcing arm 35 is fixedly connected to the vertical arm 31.
[0045] As Figure 2 and Figure 3 shown, the inner side formwork system 5 in the embodiment includes an inner side formwork small girder 51, a small girder support oil cylinder 52 and the pier top trolley, the inner side formwork small girder 51 is arranged below the inner side wing of the pre-cast box girder along the length direction of the pre-cast box girder, the small girder support oil cylinder 52 is connected with the inner side formwork small girder 51, and is used for supporting the inner side formwork small girder 51 on the pier top, and the pier top trolley is connected with the inner side formwork small girder 51, and is used for pushing the inner side formwork small girder 51 to pass through the pier top hole.
[0046] The hole passing principle of the inner side formwork system 5 in the embodiment is similar to the hole passing principle of the existing bridge erecting machine, and the inner side formwork small girder 51 is supported on the pier top by the small girder support oil cylinder 52 during pouring; during hole passing, the small girder support oil cylinder 52 is retracted, the inner side formwork small girder 51 falls onto the inner side formwork transverse beam arranged on the pier top, and the pier top trolley pushes the inner side formwork small girder 51 to move longitudinally along the inner side formwork transverse beam to pass through the hole.
[0047] As Figure 3 and Figure 4 shown, the inner side formwork system 5 in the embodiment further includes an inner side frame beam 53 and an inner side formwork transverse beam 55, the inner side frame beam 53 is connected with the inner side formwork small girder 51, and the inner side frame beam 53 is used for connecting the inner side formwork small girder 51 and the hanging beam 4, and the inner side formwork transverse beam 55 is arranged below the inner side formwork small girder 51, and is used for adjusting the transverse position of the inner side formwork small girder 51 during hole passing.
[0048] As Figure 3 and Figure 4 shown, the inner side formwork transverse beam 55 includes a base 55-1, a sliding base 55-2 and an adjusting oil cylinder 55-3, the sliding base 55-2 is installed on the base 55-1, one end of the adjusting oil cylinder 55-3 is connected with the base 55-1, the other end of the adjusting oil cylinder 55-3 is connected with the sliding base 55-2, and the adjusting oil cylinder 55-3 is used for pushing the sliding base 55-2 to move left and right on the base 55-1, the inner side formwork small girder 51 is arranged on the sliding base 55-2, and the inner side formwork small girder 51 is in sliding connection with the sliding base 55-2.
[0049] In the embodiment, the sliding seat 55-2 comprises a sliding seat body, a guide wheel is arranged on the sliding seat body, when the inner side outer mold small girder 51 falls on the sliding seat 55-2, the guide wheel is located on one side of the inner side outer mold small girder 51, for limiting the transverse position of the inner side outer mold small girder 51, and reducing unnecessary friction when the inner side outer mold small girder 51 moves longitudinally, dynamically limiting, reducing the resistance of the through hole, and providing the safety of the through hole. The sliding seat body is also provided with a hanging plate, when the inner side outer mold small girder 51 falls on the sliding seat 55-2, the hanging plate is located on the other side of the inner side outer mold small girder 51, opposite to the guide wheel, one end of the hanging plate is connected with the sliding seat body, the other end of the sliding seat body extends to the inner side outer mold small girder 51, and is located above the bottom plate at the bottom of the inner side outer mold small girder 51, can form a hanging connection, can effectively limit the position of the inner side outer mold small girder 51, prevent the inner side outer mold small girder 51 from falling out, and provide the safety of the through hole.
[0050] As shown in Figure 1 and Figure 2 The double-width cast-in-place box girder formwork further comprises a main girder rear fulcrum structure arranged at the rear of the main girder system for supporting the main girder system above the cast box girder, the main girder rear fulcrum structure comprises a guide rail 71, a transverse moving beam 72, a guide rail sliding seat 73, a rotating shaft 74, a sliding groove 75, a sliding support 76, a transverse moving oil cylinder 77, a main girder connecting beam 78 and a longitudinal moving oil cylinder, the guide rail 71 is laid on the cast box girder along the length direction of the cast box girder, the transverse moving beam 72 is arranged above the cast box girder along the transverse direction of the cast box girder, the guide rail sliding seat 73 is arranged below the transverse moving beam 72, the transverse moving beam 72 is slidingly installed on the guide rail 71 through the guide rail sliding seat 73, the axis of the longitudinal moving oil cylinder is parallel to the guide rail 71, one end of the longitudinal moving oil cylinder is connected with the guide rail 71, the other end of the longitudinal moving oil cylinder is connected with the guide rail sliding seat 73 and used for pushing the guide rail sliding seat 73 to move along the guide rail 71, the sliding groove 75 is arranged on the transverse moving beam 72, the number of the sliding grooves 75 corresponds to the number of the main girders 1, and the sliding grooves 75 are located below the corresponding main girders 1, the sliding support 76 is located between two adjacent sliding grooves 75, the sliding support 76 is slidingly installed on the transverse moving beam 72 along the left-right direction, one end of the transverse moving oil cylinder 77 is connected with the sliding support 76, the other end of the transverse moving oil cylinder 77 is connected with the transverse moving beam 72, the axis of the transverse moving oil cylinder 77 is parallel to the length direction of the transverse moving beam 72, and the transverse moving oil cylinder 77 is used for pushing the sliding support 76 to move along the length direction of the transverse moving beam 72, the main girder connecting beam 78 is horizontally arranged between two main girders 1, and both ends of the main girder connecting beam 78 are respectively fixed on the corresponding main girders 1 on the same side through bolts, the rotating shaft 74 is arranged along the vertical direction, the upper end of the rotating shaft 74 is rotatably installed on the middle part of the main girder connecting beam 78, and the lower end of the rotating shaft 74 is fixed on the sliding support 76.
[0051] As Figure 5 and Figure 6 The double-width cast-in-place box girder formwork further comprises a first pull rod 81 and a second pull rod 82, one end of the first pull rod 81 is detachably connected with the cross beam 2, the other end of the first pull rod 81 is detachably connected with the hanging beam 4 close to one end of the hanging beam connecting arm 3, one end of the second pull rod 82 is detachably connected with the cross beam 2, and the other end of the second pull rod 82 is detachably connected with the hanging beam 4 close to one end of the inner-outer formwork system 5.
[0052] The utility model discloses still a kind of construction method using the above double-width cast-in-place box girder formwork, it is characterized by comprising the following steps:
[0053] Step one, before first pouring, template overall connection, second pull rod 82 is connected to hanging beam 4 by passing through inner-outer formwork small main beam 51;
[0054] Step two, pouring, curing, after tensioning is completed, remove first pull rod 81 and second pull rod 82, overall drop mould;
[0055] Step three, remove the hanging connection of inner frame beam 53 and cross beam 2, remove the connection of outer formwork bottom formwork 63 and outer formwork outer sidewall formwork 62, remove the connection of outer formwork bottom formwork 63 and outer formwork inner sidewall formwork 64;
[0056] Step four, hanging beam 4 drives outer formwork bottom formwork 63 to rotate to the position of leaving pier body by folding oil cylinder 33 to outside;
[0057] Step five, inner-outer formwork small main beam 51 carries outer formwork inner sidewall formwork 64 and outer formwork inner wing formwork 65 and realizes individual hole passing by means of the pier top trolley;
[0058] Step six, formwork overall hole passing;
[0059] Step seven, all hole passing is completed, template is reconnected, and is jacked up to pouring position, and preparation next pouring is poured.
[0060] The above only for preferred embodiment of the utility model has been, and is not used for limiting the utility model, for the technical personnel of the field, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A double-width cast-in-place box girder formwork, characterized in that, The double-width cast-in-place box girder formwork comprises a main beam system, a suspension system and an inner side outer formwork system (5). The main beam system comprises two groups of main beams (1) and a transverse connecting piece, the two groups of main beams (1) are located on the same horizontal plane and are arranged in axial parallel, and the two groups of main beams (1) are connected through the transverse connecting piece. The suspension system comprises a plurality of groups, each group of the suspension system comprises a cross beam (2), a hanging beam connecting arm (3) and a hanging beam (4), the cross beam (2), the hanging beam connecting arm (3) and the hanging beam (4) are located on the same cross section, the cross beam (2) passes through and is fixed on the two groups of main beams (1), and the cross beam (2) is perpendicular to the main beams (1), one end of the hanging beam connecting arm (3) is fixedly connected with one end of the cross beam (2), the hanging beam (4) is located below the main beam system, and the other end of the hanging beam (4) is hingedly connected with the other end of the hanging beam connecting arm (3). The inner side outer formwork system (5) is arranged below the main beam system along the length direction of the main beam system, and the other end of the hanging beam (4) is detachably connected with the inner side outer formwork system (5).
2. The double-width cast-in-place box girder formwork according to claim 1, characterized in that: The double-width cast-in-place box girder formwork further comprises a box girder outer form (6), the box girder outer form (6) comprises an outer form outer side wing formwork (61), an outer form outer side side wall formwork (62), an outer form bottom formwork (63), an outer form inner side side wall formwork (64), an outer form inner side wing formwork (65) and a plurality of adjustable supporting rods (66), the outer form outer side wing formwork (61), the outer form outer side side wall formwork (62), the outer form bottom formwork (63), the outer form inner side side wall formwork (64) and the outer form inner side wing formwork (65) are sequentially connected to form an outer membrane of a pre-cast box girder, the outer form outer side wing formwork (61) is fixedly connected with the outer form outer side side wall formwork (62), the outer form outer side wing formwork (61) and the outer form outer side side wall formwork (62) are connected with the hanging beam connecting arm (3) through the adjustable supporting rod (66), the outer form outer side side wall formwork (62) is detachably connected with the outer form bottom formwork (63), the outer form bottom formwork (63) is fixedly connected with the hanging beam (4), the outer form bottom formwork (63) is detachably connected with the outer form inner side side wall formwork (64), the outer form inner side side wall formwork (64) is fixedly connected with the outer form inner side wing formwork (65), and the outer form inner side side wall formwork (64) and the outer form inner side wing formwork (65) are connected with the inner side outer formwork system (5) through the adjustable supporting rod (66).
3. The double-width cast-in-place box girder formwork according to claim 2, characterized in that: The hanging beam connecting arm (3) comprises a vertical arm (31), an inclined arm (32), a folding oil cylinder (33) and a folding oil cylinder support leg (34), the upper end of the vertical arm (31) is connected with the cross beam (2), and the vertical arm (31) is located outside the pre-poured box girder flange, the lower end of the vertical arm (31) is located below the pre-poured box girder flange, one end of the inclined arm (32) is fixedly connected with the lower end of the vertical arm (31), and the other end of the inclined arm (32) is inclined to the side close to the pre-poured box girder, the folding oil cylinder support leg (34) is located below the other end of the inclined arm (32), and one end of the folding oil cylinder support leg (34) is fixedly connected with the inclined arm (32), the other end of the inclined arm (32) is hinged with the hanging beam (4), one end of the folding oil cylinder (33) is hinged with the other end of the folding oil cylinder support leg (34), the other end of the folding oil cylinder (33) is hinged with the hanging beam (4), and is used for pushing the hanging beam (4) to rotate along the hinge shaft of the hanging beam (4) and the inclined arm (32).
4. The double-width cast-in-place box girder formwork according to claim 3, characterized in that: The hanging beam connecting arm (3) further comprises a reinforcing arm (35), the reinforcing arm (35) is located below the cross beam (2), and the reinforcing arm (35) is arranged obliquely with the vertical arm (31), one end of the reinforcing arm (35) is connected with the cross beam (2), and the other end of the reinforcing arm (35) is fixedly connected with the vertical arm (31).
5. The double-width cast-in-place box girder formwork according to claim 2, characterized in that: The inner side outer mold frame system (5) comprises an inner side outer mold small main beam (51), a small main beam support oil cylinder (52) and a pier top trolley, the inner side outer mold small main beam (51) is arranged below the inner side flange of the pre-poured box girder along the length direction of the pre-poured box girder, the small main beam support oil cylinder (52) is connected with the inner side outer mold small main beam (51) and is used for supporting the inner side outer mold small main beam (51) on the pier top, and the pier top trolley is connected with the inner side outer mold small main beam (51) and is used for pushing the inner side outer mold small main beam (51) to pass through the pier top hole.
6. The double-width cast-in-place box girder formwork according to claim 5, characterized in that: The inner side outer mold frame system (5) further comprises an inner side frame beam (53) and an inner side outer mold transverse moving beam (55), the inner side frame beam (53) is connected with the inner side outer mold small main beam (51), and the inner side frame beam (53) is used for connecting the inner side outer mold small main beam (51) with the hanging beam (4), and the inner side outer mold transverse moving beam (55) is arranged below the inner side outer mold small main beam (51) and is used for adjusting the transverse position of the inner side outer mold small main beam (51) when passing through the hole.
7. The double-width cast-in-place box girder formwork according to claim 6, characterized in that: The inner side outer mold transverse moving beam (55) comprises a base (55-1), a sliding seat (55-2) and an adjusting oil cylinder (55-3), the sliding seat (55-2) is installed on the base (55-1), one end of the adjusting oil cylinder (55-3) is connected with the base (55-1), the other end of the adjusting oil cylinder (55-3) is connected with the sliding seat (55-2), and the adjusting oil cylinder (55-3) is used for pushing the sliding seat (55-2) to move left and right on the base (55-1), the inner side outer mold small main beam (51) is arranged on the sliding seat (55-2), and the inner side outer mold small main beam (51) is slidably connected with the sliding seat (55-2).
8. The double-width cast-in-place box girder formwork according to claim 1, characterized in that: The double-width cast-in-place box girder formwork further comprises a main girder rear fulcrum structure arranged at the rear of the main girder system for supporting the main girder system above the cast box girder, the main girder rear fulcrum structure comprising a guide rail (71), a transverse beam (72), a guide rail sliding seat (73), a rotating shaft (74), a sliding groove (75), a sliding support (76), a transverse oil cylinder (77), a main girder connecting beam (78) and a longitudinal oil cylinder, the guide rail (71) being laid on the cast box girder along the length direction of the cast box girder, the transverse beam (72) being horizontally arranged above the cast box girder along the transverse direction of the cast box girder, the guide rail sliding seat (73) being arranged below the transverse beam (72), the transverse beam (72) being slidingly installed on the guide rail (71) through the guide rail sliding seat (73), the axis of the longitudinal oil cylinder being parallel to the guide rail (71), one end of the longitudinal oil cylinder being connected with the guide rail (71), the other end of the longitudinal oil cylinder being connected with the guide rail sliding seat (73) and used for pushing the guide rail sliding seat (73) to move along the guide rail (71), the sliding groove (75) being arranged on the transverse beam (72), the number of the sliding grooves (75) corresponding to the number of the main girders (1), and the sliding grooves (75) being located below the corresponding main girders (1), the sliding support (76) being located between two adjacent sliding grooves (75), the sliding support (76) being slidingly installed on the transverse beam (72) along the left-right direction, one end of the transverse oil cylinder (77) being connected with the sliding support (76), the other end of the transverse oil cylinder (77) being connected with the transverse beam (72), the axis of the transverse oil cylinder (77) being parallel to the length direction of the transverse beam (72), and the transverse oil cylinder (77) being used for pushing the sliding support (76) to move along the length direction of the transverse beam (72), the main girder connecting beam (78) being horizontally arranged between two main girders (1), and both ends of the main girder connecting beam (78) being fixed on the corresponding main girders (1) on the same side through bolts, the rotating shaft (74) being arranged along the vertical direction, the upper end of the rotating shaft (74) being rotatably installed at the middle part of the main girder connecting beam (78), and the lower end of the rotating shaft (74) being fixed on the sliding support (76).
9. The double-width cast-in-place box girder formwork according to claim 5, characterized in that: The double-width cast-in-place box girder formwork further comprises a first pull rod (81) and a second pull rod (82), one end of the first pull rod (81) being detachably connected with the cross beam (2), the other end of the first pull rod (81) being detachably connected with one end of the hanging beam (4) close to the hanging beam connecting arm (3), one end of the second pull rod (82) being detachably connected with the cross beam (2), and the other end of the second pull rod (82) being detachably connected with one end of the hanging beam (4) close to the inner side outer formwork system (5).