CN116804338A - A support truss for the inner formwork of the variable cross-section side wall and its construction method - Google Patents
A support truss for the inner formwork of the variable cross-section side wall and its construction method Download PDFInfo
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- CN116804338A CN116804338A CN202310704863.6A CN202310704863A CN116804338A CN 116804338 A CN116804338 A CN 116804338A CN 202310704863 A CN202310704863 A CN 202310704863A CN 116804338 A CN116804338 A CN 116804338A
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- truss
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/08—Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
本发明公开了一种用于变截面侧墙内侧模板支撑桁架及施工方法，包括支撑桁架本体、纵向移动机构、横向顶进机构、竖向提升油缸以及钢模板；支撑桁架本体包括框架式底圈梁、连接梁以及侧梁，连接梁沿框架式底圈梁长度方向的一侧均匀竖直设置，连接梁与侧梁之间通过桁式门架相连；框架式底圈梁内沿长度方向设有若干桁架底梁，横向顶进机构设置于桁架底梁上；纵向移动机构包括行走电机、行走轮以及导轨，导轨沿框架式底圈梁长度方向平行铺设于现有车站底板上，行走电机对称安装于横向顶进机构上，行走轮与行走电机相连且与导轨配合；竖向提升油缸位于框架式底圈梁底部两侧且沿其长度方向均匀设置；钢模板通过加强肋与连接梁固定连接。
The invention discloses a support truss for formwork on the inside of a variable cross-section side wall and a construction method, which includes a support truss body, a longitudinal moving mechanism, a transverse jacking mechanism, a vertical lifting oil cylinder and a steel formwork; the support truss body includes a frame-type bottom ring Beams, connecting beams and side beams. The connecting beams are evenly arranged vertically along one side of the length direction of the frame-type bottom ring beam. The connecting beams and side beams are connected through a truss gantry; the frame-type bottom ring beam is arranged along the length direction. There are several truss bottom beams, and the transverse jacking mechanism is set on the truss bottom beam; the longitudinal movement mechanism includes a traveling motor, traveling wheels, and guide rails. The guide rails are laid parallel to the existing station floor along the length of the frame-type bottom ring beam, and the traveling motors are symmetrical. Installed on the transverse jacking mechanism, the running wheels are connected to the traveling motor and cooperate with the guide rails; the vertical lifting cylinders are located on both sides of the bottom of the frame-type bottom ring beam and are evenly arranged along its length; the steel formwork is fixedly connected to the connecting beam through reinforcing ribs .
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a support truss for an inner side template of a variable cross-section side wall and a construction method.
Background
Along with the rapid development of urban economy in China, subway construction is becoming more and more popular, most of subway stations are multi-layer frame structures, vertical layering and longitudinal sectional pouring are generally adopted during on-site organization construction, and side walls and plates are respectively constructed to form flow operation.
The traditional side wall formwork supporting technology generally adopts scattered spliced wood forms and steel pipe supports to form a formwork supporting system, the method is high in applicability, can be used for section formwork supporting of different heights and different widths, but is large in one-time material input amount and high in loss rate of integral resources, long in formwork supporting time due to long-term cooperation of cranes. Often, 3 days are required to finish the erection of a section of standard side die, and the forming quality effect is poor.
At present, a few subway stations adopt a trackless or rail-mounted truss formwork system, so that the whole longitudinal movement of a template can be realized, the efficiency is higher, the forming quality is better, the system is more suitable for running water operation, and the side wall rail-mounted truss formwork system generally realizes the longitudinal long-distance movement through a rail. The transverse shifting can be only carried out by a small extent, and the transverse shifting is used for vertical die and demoulding, and can not be suitable for side wall supporting dies with sections with different widths and heights, and the conditions can also be integrally lifted by a crane, but a plurality of gussets are arranged at the widening section or the variable cross section end of the end of a general station, and the lifting can not be carried out. The trackless formwork support system needs to be installed and disassembled continuously, and is transported by a crane, so that the effect is hardly improved compared with that of a scattered splicing and steel pipe support system.
Therefore, under the premise of ensuring construction quality and construction efficiency, the development of the variable cross-section side wall template support truss which is more suitable for the high-low span and the widening section is a problem which needs to be solved in the field of subway construction industry.
Disclosure of Invention
The invention aims to overcome the defects of the technology and provide a support truss for an inner side template of a variable cross-section side wall and a construction method.
In order to solve the technical problems, the technical scheme provided by the invention is that the support truss for the inner side template of the variable cross-section side wall is as follows: the device comprises a support truss body, a longitudinal moving mechanism, a transverse jacking mechanism, a vertical lifting cylinder and a steel template;
the support truss body comprises a frame type bottom ring beam, a connecting beam and a side beam, wherein the frame type bottom ring beam is horizontally arranged with the existing station bottom plate and is provided with a certain distance, the connecting beam is uniformly and vertically arranged along one side of the length direction of the frame type bottom ring beam, two ends of the side beam are respectively connected with the other side of the frame type bottom ring beam and the top end of the connecting beam, and the connecting beam is connected with the side beam through a truss type portal;
the frame type bottom ring beam is internally and uniformly provided with a plurality of truss bottom beams along the length direction, the transverse jacking mechanism is arranged on the truss bottom beams and comprises telescopic beams, side beams and telescopic cylinders, the telescopic beams are arranged on adjacent truss bottom beams in a sliding mode, two ends of the telescopic beams are connected through the side beams to form a frame type structure, the telescopic cylinders are rotatably arranged at one ends of the telescopic beams, and the output ends of the telescopic cylinders are rotatably connected with the truss type door frames;
the longitudinal moving mechanism comprises a traveling motor, traveling wheels and guide rails, wherein the guide rails are paved on the existing station bottom plate in parallel along the length direction of the frame type bottom ring beam, the traveling motors are symmetrically arranged on the side beams, and the traveling wheels are connected with the traveling motor and matched with the guide rails;
the vertical lifting cylinders are positioned at two sides of the bottom of the frame type bottom ring beam and are uniformly arranged along the length direction of the vertical lifting cylinders;
the steel template is fixedly connected with the connecting beam through the reinforcing rib.
As an improvement, the subway station plate also comprises a fastening structure, wherein the fastening structure comprises foundation bolts and a bottom base, the foundation bolts are uniformly arranged along the length direction of the frame type bottom ring beam and positioned between adjacent truss bottom beams, and the bottom hooks of the foundation bolts are pre-buried in the axillary angle positions of the existing subway station plate in advance; the bottom base is arranged along the length direction of the two sides of the bottom of the frame type bottom ring beam, and the bottom base and the vertical lifting oil cylinders are arranged in a staggered mode.
As an improvement, one end of the foundation bolt penetrates through the frame type bottom ring beam to be connected with the truss type portal frame.
As an improvement, the bottom base and the vertical lifting cylinder are arranged at the joint of the truss bottom beam and the frame type bottom ring beam.
As an improvement, the bottom base is a height-adjustable structure.
A construction method for a variable cross-section side wall inner side template support truss comprises the following steps:
step one, embedding a fastening structure: pre-embedding anchor bolts when the bottom plate reinforcing steel bar plates are bundled according to the prior positioning of the side wall positions of the subway station, and paving guide rails on the bottom plate of the subway station;
step two, mounting a support truss body: the support truss body is formed by assembling from bottom to top, after assembling of the frame type bottom ring beam is completed, the truss bottom beam is firmly connected, meanwhile, a transverse jacking mechanism is arranged on the truss bottom beam of the frame type bottom ring beam, then a longitudinal moving mechanism is arranged on the transverse jacking mechanism, the longitudinal moving mechanism is placed on a guide rail for temporary fixing, and finally, the installation of the vertical lifting oil cylinder and the bottom base is completed;
step three, installing a steel template: firstly, connecting a steel template with a reinforcing rib, and then fixedly connecting the steel template with a connecting beam through the reinforcing rib;
fourth, reinforcing the steel template: the steel template reaches the existing station side wall pouring edge by jacking the telescopic oil cylinder in the transverse jacking mechanism, then jacking the vertical lifting oil cylinder to ensure that the steel template panel is vertical, adjusting the bottom base to enable the bottom of the bottom base to be in butt joint with the ground, and finally connecting and fastening foundation bolts pre-buried at the axillary angle position of the existing station template with the truss type portal;
step five, pouring and demoulding concrete: after the concrete reaches the strength, the bottom base is separated from the ground, and the telescopic oil cylinder and the vertical lifting oil cylinder are retracted at the same time, so that one-cycle pouring is completed.
As an improvement, in the fifth step, when the transverse widening section is constructed:
firstly, starting a traveling motor, and integrally moving a support truss body to a construction position at a widening section; secondly, starting the vertical lifting oil cylinder to separate the travelling wheels from the guide rail;
and then, retracting the telescopic oil cylinder in the transverse jacking mechanism, wherein the longitudinal moving mechanism at the lower part of the transverse jacking mechanism moves towards the side wall direction of the existing station on the truss bottom beam at the moment, and translating the guide rail to the bottom of the wheel after the telescopic oil cylinder is retracted to the maximum stroke.
Finally, the vertical lifting oil cylinder is controlled to retract and separate from the ground, meanwhile, the travelling wheels are matched with the guide rail, the telescopic oil cylinder is started again, and the telescopic oil cylinder is started again due to the limit between the travelling wheels and the guide rail, at the moment, the transverse jacking mechanism is not moved relative to the ground, and the whole supporting truss body translates towards the side wall direction of the existing station; and then repeating the first to fifth steps to finish the concrete construction of the section.
As an improvement, in the fifth step, when the vertical heightened section construction is performed:
firstly, after pouring is completed in the previous section, if the section has hoisting conditions, integrally hoisting the truss, and if the section does not have hoisting dropping pieces, integrally hoisting the supporting truss body by using a vertical hoisting oil cylinder;
secondly, adopting I-steel welding stirrups, wherein the length of each stirrup is the transverse distance arranged between the travelling wheels in the longitudinal movement mechanism, the upper surface of each stirrup is flush with the surface of the high span, and after the stirrups are paved, the guide rails are paved on the surface and the surface of the high span.
Finally, controlling the vertical lifting oil cylinder to retract and separate from the ground, simultaneously enabling the travelling wheels to be matched with the guide rail, starting the travelling motor and longitudinally supporting the truss body;
and then repeating the first to fifth steps to finish the concrete construction of the section.
Compared with the prior art, the invention has the advantages that: the construction period is shorter: compared with the traditional wood die and the trackless truss template which are repeatedly disassembled and assembled and lifted, the single-section lifting device is long in time consumption in mounting, and the vertical lifting oil cylinder and the horizontal jacking mechanism are convenient and quick to operate, so that the adjustment time can be greatly shortened.
2. The applicability is stronger: compared with the track truss templates commonly used at present, the track truss template is applicable to side wall support templates of stations with vertical high-low span and horizontal variable cross section or normal stations, and has stronger universality. And whether a single truss or an integral template system adopts an assembled type, the templates can be assembled according to the height and the length of the side walls.
Drawings
FIG. 1 is a side view of a side wall inner formwork support truss for a variable cross section in accordance with the present invention.
Fig. 2 is a top view of a side wall inner side formwork support truss for a variable cross section according to the present invention.
Fig. 3 is a cross-sectional view of a template support truss for a variable cross-section sidewall inboard side at a vertical lift cylinder in accordance with the present invention.
Fig. 4 is a flow chart of a construction method for the variable cross-section side wall inner side template support truss.
Fig. 5 is a second construction method flow for the variable cross section side wall inner side formwork support truss of the present invention.
As shown in the figure: 1. the vertical lifting oil cylinder, 2, a steel template, 3, a connecting beam, 4, a side beam, 5, a truss bottom beam, 6, a telescopic beam, 7, a side beam, 8, a telescopic oil cylinder, 9, a walking motor, 10, walking wheels, 11, a guide rail, 12, a reinforcing rib, 13, an anchor bolt, 14, a bottom base, 15, stirrups, 16, a station bottom plate, 17, a station side wall, 18, a frame type bottom ring beam, 19 and a truss type portal frame.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the inventive embodiments generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the embodiments of the invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the invention, "plurality" represents at least 2.
In the description of the embodiments of the invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the invention will be understood by those skilled in the art according to the specific circumstances.
1-3, the support truss for the variable cross section side wall inner side template comprises a support truss body, a longitudinal moving mechanism, a transverse jacking mechanism, a vertical lifting oil cylinder 1 and a steel template 2;
the support truss body comprises a frame type bottom ring beam 18, a connecting beam 3 and a side beam 4, wherein the frame type bottom ring beam 18 is horizontally arranged with the existing station bottom plate and is provided with a certain distance, the connecting beam 3 is uniformly and vertically arranged along one side of the length direction of the frame type bottom ring beam 18, two ends of the side beam 4 are respectively connected with the other side of the frame type bottom ring beam 18 and the top end of the connecting beam 3, and the connecting beam 3 is connected with the side beam 4 through a truss type portal 19;
specifically, the connecting beam 3 and the side beam 4 are assembled by adopting a plurality of sections, the connecting beam 3 and the side beam 4 are integrally connected through bolts, the connecting beam is made of H-shaped steel, the truss type portal 19 is made of 16# I-shaped steel, the top of the truss type portal is in a right-angle triangle shape, and the rest of the truss type portal is in a right-angle trapezoid shape.
The frame type bottom ring beam 18 is internally and uniformly provided with a plurality of truss bottom beams 5 along the length direction, the transverse jacking mechanism is arranged on the truss bottom beams 5 and comprises telescopic beams 6, side beams 7 and telescopic cylinders 8, the telescopic beams 6 are arranged on the adjacent truss bottom beams 5 in a sliding manner, two ends of the telescopic beams 6 are connected through the side beams 7 to form a frame type structure, the telescopic cylinders 8 are rotatably arranged at one ends of the telescopic beams 6, and the output ends of the telescopic cylinders are rotatably connected with the truss type door frames 5;
in specific implementation, the telescopic length of the telescopic cylinder 8 is determined according to the distance between the side beam 7 and the side beam of the frame type bottom ring beam 18, and the standard jacking length is generally 50-70cm.
The longitudinal moving mechanism comprises a traveling motor 9, traveling wheels 10 and a guide rail 11, wherein the guide rail 11 is paved on the existing station bottom plate in parallel along the length direction of a frame type bottom ring beam 18, the traveling motor 9 is symmetrically arranged on the side beam 7, and the traveling wheels 10 are connected with the traveling motor 9 and are matched with the guide rail 11;
the vertical lifting oil cylinders 1 are positioned at two sides of the bottom of the frame type bottom ring beam 18 and are uniformly arranged along the length direction of the frame type bottom ring beam; specifically, the number of the vertical lift cylinders 1 is set according to actual situations.
The steel template 2 is fixedly connected with the connecting beam 3 through the reinforcing rib 12.
Specifically, the steel template 2 adopts a molding steel template, and is firmly connected with the reinforcing rib 12 through bolts, the reinforcing rib 12 is formed by welding double-spliced I-steel, and is arranged on the right-angle side edge of the support truss and is connected through bolts.
The underground railway station plate is characterized by further comprising a fastening structure, wherein the fastening structure comprises foundation bolts 13 and a bottom base 14, the foundation bolts 13 are uniformly arranged along the length direction of a frame type bottom ring beam 18 and positioned between adjacent truss bottom beams 5, and the bottom crotch of the foundation bolts 13 is pre-buried in the axillary angle position of the existing underground railway station plate in advance; the bottom base 14 is arranged along the length direction of the two sides of the bottom of the frame type bottom ring beam 18, and the bottom base 14 and the vertical lifting oil cylinders 1 are arranged in a staggered mode.
Further, one end of the foundation bolt 13 passes through a frame type bottom ring beam 18 to be connected with the truss type portal 5. The bottom base 14 and the vertical lifting oil cylinder 1 are arranged at the joint of the truss bottom beam 5 and the frame type bottom ring beam 18.
The bottom base 14 is of a height-adjustable structure, specifically, the bottom base 14 is provided with a screw thread, and the length of the screw rod can be adjusted to prop against the ground.
Referring to fig. 4-5, a construction method for a variable cross section side wall inner side template support truss comprises the following steps:
step one, embedding a fastening structure: pre-burying anchor bolts 13 when the bottom plate reinforcing steel plates are bundled according to the prior positioning of the side wall positions of the subway station, and paving guide rails 11 on the bottom plate of the subway station;
step two, mounting a support truss body: the supporting truss body is formed by assembling from bottom to top, after the frame type bottom ring beam 18 is assembled, the truss bottom beam 5 is firmly connected, meanwhile, a transverse jacking mechanism is arranged on the truss bottom beam 5 of the frame type bottom ring beam 18, then a longitudinal moving mechanism is arranged on the transverse jacking mechanism, the longitudinal moving mechanism is placed on a guide rail 11 for temporary fixation, and finally, the vertical lifting oil cylinder 1 and the bottom base 14 are arranged;
step three, installing a steel template: firstly, connecting a steel template 2 with a reinforcing rib 12, and then fixedly connecting the steel template 2 with a connecting beam 3 through the reinforcing rib 12;
fourth, reinforcing the steel template: the steel template 2 reaches the pouring edge of the side wall of the existing station by jacking the telescopic oil cylinder 8 in the transverse jacking mechanism, then jacking the vertical lifting oil cylinder 1 to ensure that the panel of the steel template 2 is vertical, adjusting the bottom base 14 to enable the bottom of the bottom base 14 to be in butt joint with the ground, and finally connecting and fastening the foundation bolts 13 pre-buried at the axillary angle position of the existing station with the truss type portal 5;
step five, pouring and demoulding concrete: after the concrete reaches the strength, the bottom base 14 is separated from the ground, and the telescopic oil cylinder 8 and the vertical lifting oil cylinder 1 are retracted at the same time, so that one-cycle pouring is completed.
In the construction process, when the transverse widening section is required to be constructed:
firstly, starting a traveling motor 9, and integrally moving the support truss body to a construction position at a widening section; secondly, starting the vertical lifting oil cylinder 1 to separate the travelling wheel 10 from the guide rail 11;
then, the telescopic cylinder 8 in the transverse jacking mechanism is retracted, at this time, the longitudinal moving mechanism at the lower part of the transverse jacking mechanism moves on the truss bottom beam 5 towards the existing station side wall direction, and after the telescopic cylinder 8 is retracted to the maximum stroke, the guide rail 11 is translated to the bottom of the wheel.
Finally, the vertical lifting oil cylinder 1 is controlled to retract and separate from the ground, meanwhile, the travelling wheel 10 is matched with the guide rail 11, the telescopic oil cylinder 8 is started again due to the limit between the travelling wheel 10 and the guide rail 11, at the moment, the transverse jacking mechanism is not moved relative to the ground, and the whole supporting truss body translates towards the side wall direction of the existing station; and then repeating the first to fifth steps to finish the concrete construction of the section.
In the construction process, when the vertical heightening section construction is needed:
firstly, after pouring is completed in the previous section, if the section has hoisting conditions, the truss is integrally lifted, and if the section does not have hoisting dropping pieces, the vertical lifting oil cylinder 1 is utilized to integrally lift the supporting truss body;
secondly, the stirrup 12 is welded by adopting I-steel, the length of the stirrup 12 is the transverse interval arranged between the running wheels 10 in the longitudinal moving mechanism, the upper surface of the stirrup 12 is flush with the high-span surface, and after the stirrup 12 is paved, the guide rail 11 is paved on the surface and the high-span surface.
Finally, the vertical lifting oil cylinder 1 is controlled to be retracted and separated from the ground, meanwhile, the travelling wheels 10 are matched with the guide rails 11, the travelling motor 9 is started, and the truss body is longitudinally supported;
and then repeating the first to fifth steps to finish the concrete construction of the section.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310704863.6A CN116804338A (en) | 2023-06-14 | 2023-06-14 | A support truss for the inner formwork of the variable cross-section side wall and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310704863.6A CN116804338A (en) | 2023-06-14 | 2023-06-14 | A support truss for the inner formwork of the variable cross-section side wall and its construction method |
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| CN116804338A true CN116804338A (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310704863.6A Pending CN116804338A (en) | 2023-06-14 | 2023-06-14 | A support truss for the inner formwork of the variable cross-section side wall and its construction method |
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| CN (1) | CN116804338A (en) |
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| CN117605278A (en) * | 2023-12-18 | 2024-02-27 | 中建八局第三建设有限公司 | An intelligent side wall large steel formwork construction system and method |
| CN117703064A (en) * | 2023-11-30 | 2024-03-15 | 中国五冶集团有限公司 | External mold erecting system capable of integrally turning underground retaining wall |
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| CN117703064A (en) * | 2023-11-30 | 2024-03-15 | 中国五冶集团有限公司 | External mold erecting system capable of integrally turning underground retaining wall |
| CN117605278A (en) * | 2023-12-18 | 2024-02-27 | 中建八局第三建设有限公司 | An intelligent side wall large steel formwork construction system and method |
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