CN115897418B - A method for quickly replacing and closing the outer mold in continuous beam construction - Google Patents
A method for quickly replacing and closing the outer mold in continuous beam construction Download PDFInfo
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- CN115897418B CN115897418B CN202211337222.3A CN202211337222A CN115897418B CN 115897418 B CN115897418 B CN 115897418B CN 202211337222 A CN202211337222 A CN 202211337222A CN 115897418 B CN115897418 B CN 115897418B
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Abstract
本发明公开了一种连续梁施工中外侧模的快速更换和合模方法，包括以下步骤：解除顶部侧板单元和调整节侧板单元之间的连接，外侧模翼缘模板部分和顶部侧板单元向外移动；解除调整节侧板单元和底部侧板单元之间的连接，将调整节侧板单元吊离，并将高度缩减的调整节侧板单元吊装至更换位置处；新更换的调整节侧板单元与底部侧板单元连接，使新更换的调整节侧板单元与顶部侧板单元相贴合，完成新更换的调整节侧板单元与顶部侧板单元的连接固定；根据底模角度和高度的调整，调整外侧模腹板部分和外侧模翼缘模板部分的角度和高度，与设计位置的角度和高度相匹配，完成外侧模的更换和合模。本发明的方法能实现外侧模的快速更换和合模，提高了作业效率，降低了高空作业风险。
The invention discloses a method for rapid replacement and mold closing of an outer mold in continuous beam construction, comprising the following steps: releasing the connection between the top side plate unit and the adjustment section side plate unit, and moving the outer mold flange template part and the top side plate unit outward; releasing the connection between the adjustment section side plate unit and the bottom side plate unit, lifting the adjustment section side plate unit, and hoisting the height-reduced adjustment section side plate unit to a replacement position; connecting the newly replaced adjustment section side plate unit to the bottom side plate unit, so that the newly replaced adjustment section side plate unit fits the top side plate unit, and completing the connection and fixation of the newly replaced adjustment section side plate unit to the top side plate unit; adjusting the angle and height of the outer mold web part and the outer mold flange template part according to the adjustment of the bottom mold angle and height, matching the angle and height of the design position, and completing the replacement and mold closing of the outer mold. The method of the invention can realize rapid replacement and mold closing of the outer mold, improve the operation efficiency, and reduce the risk of high-altitude operation.
Description
Technical Field
The invention relates to the technical field of continuous beam pouring construction, in particular to a method for quickly replacing and closing an outer die in continuous beam construction.
Background
It is known that the common concrete frame structure cannot meet the requirements of multiple functions due to small span and dense column meshes, and the prestress can effectively solve the problems. The prestressed concrete can fully exert the efficacy of materials, has smaller cross section, light weight, large rigidity, good crack resistance and durability than the common reinforced concrete member under the same conditions, can effectively control the deflection (even no deflection) of the structure, saves steel by 40-50 percent and concrete by 20-40 percent, and is more economical particularly in a large-span structure, so that the application of the conventional prestressed concrete continuous beam bridge is more and more extensive, and becomes one of core bridges used in bridge engineering construction. The cantilever casting method is a common method for continuous beam bridge construction, but the construction process is complex, and a plurality of construction technical problems are solved, the more the existing continuous beam cantilever casting hanging basket is usually operated manually, the longer the cantilever casting construction period is, so that the whole project period is seriously influenced, and meanwhile, the construction quality is difficult to control due to manual operation.
Taking an outer mold as an example, under the traditional hanging basket type, the outer mold is used as one of main supporting mold members and is responsible for supporting vertical load pressure and box side mold pressure in the concrete pouring process of the continuous beam flange plates, and the mold can be repeatedly used for many times under the condition of low deformation by adopting a general mold structure type supported by a steel panel and a steel back rib truss. And after each continuous beam section is poured and reaches a certain strength, the continuous beam template is required to be removed so as to pour the continuous beam of the next section.
For dismantling the outer mold, the traditional process is that the traditional side mold is supported by a slide Liang Jiechu, a front hanging strip and a rear hanging strip are hung simply, when the outer mold is required to be wholly lowered after the segment construction is completed, the outer mold is separated from the concrete surface by utilizing the dead weight of the outer mold, and due to the influence of the cohesive force of the concrete surface, the outer mold is often required to be manually pried to separate from the concrete structure, and the sliding beam is utilized to realize the forward movement of the outer mold. The dismantling mode has the following defects that (1) the outer die is manually pried to be replaced to cause the die plate to fall off instantly easily, impact is caused on the hanging basket component, (2) because the dismantling is carried out by means of manual operation, the manual operation is dependent on the operation level and familiarity degree of constructors, and certain influence is caused on the construction efficiency, and (3) the outer die is dismantled mostly, the whole die plate is dismantled downwards, the height difference of the segmental beam is large in the continuous beam with a large span, the bottom is often beyond the bottom modulus meter space, and in the construction of the bridge crossing over the road, the construction operation is extremely inconvenient and has a large risk because the bottom space is limited and the site excision is required. Therefore, it is necessary to develop a rapid method for the outer mold of the continuous beam to reduce the degree of dependence on manual operations, reduce construction risks, improve construction efficiency, and protect edge and corner angles of the continuous beam.
Disclosure of Invention
The invention discloses a quick replacement and die assembly method for an outer die in continuous beam construction, which can realize the replacement of an outer die device by adopting left and right telescopic pieces and a supporting portal frame structure capable of telescopic up and down, improves the working efficiency and reduces the risk of high-altitude operation.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The quick replacement and die assembly method of the outer die in continuous beam construction comprises the steps that the outer die comprises an outer die web plate part and an outer die flange template part, wherein the outer die web plate part at least comprises 3 sections of detachable side plate units, the outer die web plate part comprises a top side plate unit, an adjusting section side plate unit and a bottom side plate unit, and the adjusting section side plate unit is used for replacing according to the change of the height of a continuous beam;
The method comprises the specific steps of removing connection between a top side plate unit and an adjusting section side plate unit, enabling an outer side die flange part and the top side plate unit to move outwards, removing connection between the adjusting section side plate unit and a bottom side plate unit, lifting the adjusting section side plate unit away, lifting the adjusting section side plate unit with reduced height to a replacement position, connecting the newly replaced adjusting section side plate unit with the bottom side plate unit, enabling the newly replaced adjusting section side plate unit to be attached to the top side plate unit, completing connection fixation of the newly replaced adjusting section side plate unit and the top side plate unit, adjusting the angle and the height of an outer side die web part and an outer side die flange part according to adjustment of the angle and the height of a bottom die, matching the angle and the height of a design position, and completing replacement and die assembly of an outer side die;
The method comprises the steps of adjusting the angles of an outer side die web plate part and an outer side die flange die plate part according to the adjustment of the angle of a bottom die, matching the angles with the design angle, removing the connection between a top side plate unit and an outer side die flange die plate part, moving the outer side die flange die plate part and the top side plate unit outwards, removing the connection between the outer side die web plate unit and a bottom side plate unit, lifting the outer side die plate unit away, lifting the outer side die plate unit to a replacement position, connecting the outer side die plate unit with the bottom side plate unit, enabling the outer side die plate unit to be attached to the top side plate unit, completing the connection and fixation of the outer side die web plate part and the outer side die flange die plate part, and matching the outer side die web plate part and the outer side die flange die plate part according to the adjustment of the height of the bottom die.
Further, an outer die supporting mechanism is arranged on the outer side of the outer die web plate part, two groups of outer die supporting mechanisms are symmetrically arranged on the outer side of the outer die, each group of outer die supporting mechanisms comprises a supporting door frame, a top bearing supporting piece, an outer die sliding piece, a left telescopic piece, a right telescopic piece and a bottom supporting unit, the supporting door frame is arranged on the outer side of the outer die web plate part and is of an up-down telescopic structure, at least 2 rows of outer die supporting mechanisms are arranged on the outer side of the outer die web plate part, the top bearing supporting piece is arranged on the supporting door frame, a track which is transversely arranged is arranged on the top bearing supporting piece, an outer die flange template part which is transversely movable is arranged in the track, the left telescopic piece and the right telescopic piece are arranged on one side of the supporting door frame and/or the top bearing supporting piece towards the outer die web plate part, and the other end of the outer die web plate part is connected with the outer die web plate part, a longitudinal bottom supporting unit is arranged on the lower side of the supporting door frame, the bottom supporting door frame comprises a bottom supporting longitudinal beam and an angle adjusting piece, the bottom supporting longitudinal beam is connected with the lower end of the supporting door frame, the angle adjusting longitudinal beam is connected with the bottom longitudinal beam, and the bottom supporting mechanism is connected with the other side of the bottom supporting mechanism in a hinged manner, and the bottom supporting mechanism is connected with one side of the bottom end of the bottom supporting mechanism;
The method comprises the specific steps of removing connection between a top side plate unit and an adjusting section side plate unit, retracting left and right telescopic members connected with a top bearing support piece, enabling an outer side die flange plate part and the top side plate unit to move outwards by means of an outer side die sliding member, removing connection between the adjusting section side plate unit and the bottom side plate unit, hanging the adjusting section side plate unit away, hanging the adjusting section side plate unit with reduced height to a replacement position, connecting the newly replaced adjusting section side plate unit with the bottom side plate unit, enabling the left and right telescopic members connected with the bottom side plate unit to adjust the angle and/or the height of a supporting portal frame upwards, enabling the newly replaced adjusting section side plate unit to be attached to the top side plate unit, completing connection fixation of the newly replaced adjusting section side plate unit with the top side plate unit, adjusting the angle and the height of a bottom bearing mechanism and adjusting the height of the supporting portal frame, shrinking the angle adjusting member at the rear end part of a bottom supporting longitudinal beam, enabling the angle and the height of a bottom die to be matched with the bottom plate and the height of a designed beam section, enabling the supporting portal frame to be restored to a vertical state, enabling the angle and the height of the outer side die flange plate part to be matched with the position of the designed beam Duan Yiban, and completing die assembly and die assembly.
The angle of the bottom bearing mechanism is adjusted to enable the elevation angle of the bottom die to be matched with the elevation angle of the bottom plate of the designed beam section, the angle adjusting piece is adjusted to enable the supporting portal frame to be restored to the vertical state, the connection between the top side plate unit and the adjusting section side plate unit is released, the left telescopic piece and the right telescopic piece connected with the top bearing supporting piece are contracted, the outer side die flange formwork part and the top side plate unit move outwards by means of the outer side die sliding piece, the connection between the adjusting section side plate unit and the bottom side plate unit is released, the adjusting section side plate unit is lifted away, the adjusting section side plate unit with the reduced height is lifted to the replacement position, the newly replaced adjusting section side plate unit is connected with the bottom side plate unit, the left telescopic piece and the right telescopic piece connected with the bottom side plate unit are adjusted to enable the newly replaced adjusting section side plate unit to be attached to the top side plate unit, the connection and the fixing of the newly replaced adjusting section side plate unit and the top side plate unit are completed, the height of the bottom bearing mechanism and the height of the supporting portal frame are adjusted to enable the height of the bottom die to be matched with the height of the bottom plate of the designed beam section, the height of the outer die flange part to be matched with the position of the designed beam Duan Yiban, and the replacement of the outer die is completed.
Further, the angle adjusting piece comprises a supporting screw rod, an upper adjusting nut and a lower adjusting nut, wherein the upper end of the supporting screw rod penetrates through the bottom supporting longitudinal beam, the upper adjusting nut is sleeved on the part, located above the bottom supporting longitudinal beam, of the supporting screw rod in a matching mode, and the lower adjusting nut is sleeved on the part, located below the bottom supporting longitudinal beam, of the supporting screw rod in a matching mode;
When the angle of the supporting portal is adjusted to enable the supporting portal to be restored to a vertical state, the positions of the lower adjusting nut and the upper adjusting nut are adjusted, the distance between the bottom supporting longitudinal beam and the bottom bearing mechanism is changed, and therefore the angle is adjusted.
Further, the support portal comprises a portal upright post and a portal beam, and two ends of the portal beam are respectively connected with the portal upright post.
The door frame vertical rod comprises a first door frame vertical rod and a second door frame vertical rod, wherein the first door frame vertical rod is a hydraulic jack, the second door frame vertical rod is a telescopic supporting rod, and the first door frame vertical rod and the second door frame vertical rod are arranged in parallel;
when the height of the support portal is adjusted, the height limitation of the telescopic support rod is relieved, the piston rod of the hydraulic jack is contracted, and the height of the telescopic support rod is locked after the piston rod of the hydraulic jack is adjusted in place, so that the height adjustment of the flange template part of the outer side die is realized.
Still further, second door frame pole includes upper segment pole setting part, middle section pole setting part and hypomere pole setting part, middle section pole setting part both ends are provided with the external screw thread, and the lower extreme of upper segment pole setting part and the upper end of hypomere pole setting part are provided with the internal screw thread, and upper segment pole setting part and hypomere pole setting part match respectively with the upper end and the lower extreme of middle part pole setting part and form threaded connection.
Further, the top bearing support comprises an outer die support longitudinal beam and an outer die support cross beam, the outer die support longitudinal beam is longitudinally connected to the top ends of the plurality of portal uprights, and the outer die support cross beam is vertically connected to the outer die support longitudinal beam and is provided with the track.
Further, 2 left and right telescopic members are arranged on one side of the fixed part of the portal upright rod close to the outer side die web plate part in a matching way, and a triangular connection structure is formed between the left and right telescopic members and the outer side die web plate part;
when the newly replaced adjusting section side plate unit is adjusted to be attached to the top side plate unit, the left and right telescopic members connected with the vertical rod fixing part of the portal frame are rotated upwards by a certain angle and telescopic for a certain length, so that the lifting of the web plate part of the outer side die is realized.
Further, the left telescopic piece and the right telescopic piece are electric push rods or hydraulic cylinders.
Further, the tower crane is used for lifting the adjusting section side plate unit to the replacement position from the adjusting section side plate unit with reduced height.
The method for quickly replacing and closing the outer die in the continuous beam construction has the following advantages:
(1) The invention introduces an outer die supporting mechanism, the outer die supporting mechanism is designed with a left telescopic piece, a right telescopic piece and an outer die sliding piece for realizing the movement of a top side plate unit, so that a space is provided for the replacement of an adjusting section side plate unit, then the up-and-down adjustment of the left telescopic piece and the right telescopic piece is realized for the adjustment of the position of the side plate unit, finally the up-and-down telescopic supporting portal frame is combined for realizing the height adjustment of the outer die flange template part, the replacement of an outer die device is completed, the traditional process of manually dragging and replacing the outer die is changed, the operation efficiency is improved, and the risk of high-altitude operation is reduced.
(2) According to the invention, the angle adjusting piece is arranged in the bottom supporting unit, so that the angle adjustment of the flange template part of the outer side die can be completed, the angle adjustment of the bottom die can be cooperatively completed, and the degree of automation of the disassembly and replacement of the outer die is improved.
(3) According to the invention, the outer side die web plate part is arranged into a plurality of segments, wherein the side plate units of the adjusting segments can be replaced to realize outer side die construction suitable for different beam heights, and the problem of height limiting conflict of the construction space under the bridge caused by downward dismantling is solved.
Drawings
Fig. 1 is a schematic view of the structure of one side of the outside die and the outside die supporting mechanism.
Fig. 2 is a right-side view of the structure of fig. 1.
FIG. 3 is a schematic top view of an outboard die flange form portion and an outboard die web portion.
Fig. 4 is a schematic view of the structure of the outer mold device of the present utility model in use.
Fig. 5 is a schematic left-hand view of the section A-A of fig. 4.
In the figure, an outer die web part 1, a bottom side plate unit 101, an adjusting section side plate unit 102, a top side plate unit 103, an outer die sliding part 2, an outer die flange template part 3, a left and right telescopic part 4, an outer die supporting cross beam 5, an outer die supporting longitudinal beam 6, a support nut 7, a portal upright 8, a fixed support 9, a bottom supporting longitudinal beam 10, an operating platform, a bottom die longitudinal beam 12, a portal cross beam 13, a lower rear cross beam 14, a lower front cross beam 15, a hinge part 16, an angle adjusting part 17, an upper spandrel girder 18, an upper front cross beam 19, a front sling 20, an upper rear cross beam 21, a first anchor fixing part 22, a continuous beam 23, a rear sling 24, a lower walking beam 25, a back pressure beam 26, an anchor 27, an upright 28, a framework longitudinal beam 29, an inner die 30, a walking mechanism 31 and a bottom die 32.
Detailed Description
The technical solutions in 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. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention.
In the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly, as they are, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or directly connected, or indirectly connected via an intervening medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The template for pouring the continuous beam comprises an outer side die, an inner die 30 and a bottom die 32, wherein the bottom die 32 is positioned at the bottom of the outer die device, and the inner die 30 is arranged between the outer side dies.
For the outer side die, the outer side die web plate part 1 and the outer side die flange die plate part 3 are included conventionally, but the outer side die web plate part 1 is specially designed in the embodiment, the outer side die web plate part 1 at least comprises 3 sections of detachable side plate sections, specifically a bottom side plate unit 101, an adjusting section side plate unit 102 and a top side plate unit 103, wherein the upper edge of the top side plate unit 103 is connected with the outer side die flange die plate part 3, the adjusting section side plate unit 102 is a replaceable section, can be divided into two sections, and the corresponding adjusting section side plate unit 102 is selected to replace according to different beam high sections, so that the whole outer side die web plate part 1 is prevented from being replaced, the working difficulty is reduced, and the safety of operation is improved. The butt joint between the side plate units can adopt the bolt connection of double-row anti-dislocation joints, the side plate units are guaranteed to be flush in plate surface, the overall height is suitable for the height of the section beam, the overall upward replacement of the outer side die can be realized, the mode of downward adjusting the height of the outer side die plate of the section is different from the mode of downward adjusting the height of the outer side die plate of the traditional die plate, and the problems of limited height and occupied bottom space of the bottom of a construction area are avoided.
The method comprises the steps of connecting a top side plate unit 103 and an adjusting section side plate unit 102, connecting an outer side die flange die plate part 3 and the top side plate unit 103 outwards, connecting an adjusting section side plate unit 102 and a bottom side plate unit 101, lifting the adjusting section side plate unit 102 to a replacement position, connecting the newly replaced adjusting section side plate unit 102 and the bottom side plate unit 101, enabling the newly replaced adjusting section side plate unit 102 to be attached to the top side plate unit 103 (the newly replaced adjusting section side plate unit 102 is moved upwards or the top side plate unit 103 is moved downwards), connecting and fixing the newly replaced adjusting section side plate unit 102 and the top side plate unit 103, adjusting the angle and the height of an outer die web plate part 1 and the outer die flange die plate part 3 according to adjustment of the angle and the height of a bottom die 32, matching the angle and the height of a design position, and completing replacement and die assembly of an outer die;
Or the angle of the outer side mold web part 1 and the outer side mold flange mold plate part 3 is adjusted according to the adjustment of the angle of the bottom mold 32 to match the design angle, the connection between the top side plate unit 103 and the outer side mold flange mold plate part 3 and the top side plate unit 103 is released, the connection between the outer side plate unit 102 and the bottom side plate unit 101 is released, the outer side mold web part 1 and the outer side mold flange mold plate part 3 are lifted off and the height-reduced outer side plate unit 102 is lifted to the replacement position, the newly replaced outer side plate unit 102 is connected with the bottom side plate unit 101 to enable the newly replaced outer side plate unit 102 to be attached to the top side plate unit 103 (the newly replaced outer side plate unit 102 is moved upwards or the top side plate unit 103 is moved downwards) so as to complete the connection and fixation of the newly replaced outer side plate unit 1 and the outer side plate 3 are adjusted according to the adjustment of the height of the bottom mold 32 to match the height of the design position, and the replacement and the mold closing of the outer side mold are completed.
The invention introduces an outer side die supporting mechanism to provide a preferable concrete structure for realizing the adjusting method, and the concrete structure is used for realizing the replacement and the die assembly of the outer side die. The following describes the outside mold supporting mechanism:
The outer side mold supporting mechanism comprises a supporting portal, top bearing supporting pieces, left and right telescopic pieces 4, an outer side mold sliding piece 2 and a bottom supporting unit, wherein the outer side mold comprises an outer side mold web part 1 and an outer side mold flange template part 3, the supporting portal is arranged at the outer side of the outer side mold web part 1, and is particularly arranged at the left side and the right side of the outer side mold web part 1, each side is at least provided with 2 rows for an up-and-down telescopic structure, at least provided with 2 rows, the different heights of each row of supporting portal can be adjusted according to the situation, so as to match the different heights of different beams Duan Demo and the outer side mold flange template part 3, 5 rows are arranged in parallel along the longitudinal interval of the outer side mold, the positions and the number of supporting trusses corresponding to the outer side mold flange template part 3, the top bearing supporting pieces are arranged at the top of the supporting portal, and a track is arranged transversely, each supporting portal is correspondingly provided with one top bearing supporting piece, so that the outer side mold flange part 3 is stably supported by the supporting portal, and the outer side mold flange part 3 is provided with guiding for the outer side mold to move outwards, the outer side mold supporting frame 2 is provided with a guiding piece, the left side supporting piece 2 is arranged at the lower side of the outer side mold web part 3, the outer side of the outer side mold supporting unit is also provided with a side supporting web part 4, the left side supporting unit is capable of supporting the outer side template part, and the outer side template part is provided with a side supporting web part 4, and the outer side supporting unit is provided with a side supporting the left side frame, and the outer side supporting unit is capable of moving towards the outer side frame, and the outer side supporting unit is provided with a side supporting frame, and the side supporting frame is capable of supporting frame, and is provided. The left and right telescopic members 4 arranged on one side of the support portal can provide support for a side plate unit below the top side plate unit 103, in addition, the left and right telescopic members 4 arranged on one side of the support portal can also adjust angles to help realize up and down adjustment of the side plate unit, and the bottom support unit is connected with the lower end of the support portal and is used for providing support for the support portal. The outer mould on one side and the corresponding support portal, top bearing support piece, left and right telescopic pieces 4, outer mould sliding piece 2 and bottom support unit are shown in fig. 1, and the outer mould on the other side is symmetrically provided with the structure, so that the outer mould can be combined with the structure shown in fig. 5.
Further, the bottom support unit includes bottom support longeron 10, and this embodiment still is provided with fixed bolster 9, and bottom support longeron 10 passes through fixed bolster 9 to be connected with the lower extreme that supports the portal, and the accessible bottom bearing mechanism realizes fixing between the bottom support longeron 10 for whole bearing structure keeps the wholeness. Further, the bottom supporting unit further comprises an angle adjusting member 17, and as shown in fig. 2, the bottom supporting mechanism and the angle adjusting member 17 are additionally shown in fig. 2 relative to fig. 1, the upper end of the angle adjusting member 17 is connected with one side of the bottom supporting longitudinal beam 10, the lower end extends vertically to be connected with the bottom supporting mechanism, the vertical direction expressed here is specifically that the vertical direction is not absolutely vertical, and the other side of the bottom supporting longitudinal beam is provided with a rotatable hinge member 16 connected with the bottom supporting mechanism. Specifically, this embodiment provides a structure of a specific angle adjusting member 17, and as shown in fig. 2 and 4, the angle adjusting member 17 includes a supporting screw, an upper adjusting nut and a lower adjusting nut, the lower end of the supporting screw is connected with the bottom bearing structure, the upper end of the supporting screw passes through the bottom supporting longitudinal beam 10, the upper adjusting nut is sleeved on the portion matching sleeve above the bottom supporting longitudinal beam 10, the lower adjusting nut is sleeved on the portion matching sleeve below the bottom supporting longitudinal beam 10, and the upper end of the supporting screw is fixed in the bottom supporting longitudinal beam 10 by the upper adjusting nut and the lower adjusting nut.
Further, the support portal comprises a portal upright post 8 and a portal cross beam 13, two ends of the portal cross beam 13 are respectively connected with portal upright posts, each support portal is at least provided with two portal upright posts 8, the portal upright posts 8 are connected through the portal cross beam 13, of course, the portal cross beam 13 can be made of steel plates, and can also be used as an operation platform and a running channel for operators, or pattern steel plates are welded on the portal cross beam 13 to be used as an operation platform 11. In this embodiment, the first portal vertical rod is a telescopic support rod, i.e. a mechanical lifting structure, the first portal vertical rod and the second portal vertical rod are arranged in parallel at intervals, the first portal vertical rod provides power for stretching, i.e. a piston of the hydraulic lifting jack stretches to provide power for stretching of the portal vertical rod 8, the second portal vertical rod provides stable supporting force and can be of a sleeve rod structure, the portal vertical rod comprises an upper section vertical rod part, a middle section vertical rod part and a lower section vertical rod part, two ends of the middle section vertical rod part are provided with external threads, the lower end of the upper section vertical rod part and the upper end of the lower section vertical rod part are provided with internal threads, the upper section vertical rod part and the lower section vertical rod part are respectively matched with the upper end and the lower end of the middle section vertical rod part to form threaded connection, and the length of the second portal vertical rod can be adjusted by rotating the middle section, and the relative positions of the upper section vertical rod part or the lower section vertical rod part and the middle section vertical rod part can be adjusted. In combination with the structure of this embodiment, a row of support masts selects a first mast upright, and an adjacent row of support masts selects a second mast upright, i.e., the first mast upright and the second mast upright are arranged in parallel and spaced apart. According to the structure of the portal upright 8 in this embodiment, in order to provide a powerful support for the outer die, 2 left and right telescopic members 4 are disposed on one side of the fixed portion (i.e., the portion which does not stretch out and draw back) of the portal upright 8 close to the outer die web portion 1, a triangle connection structure is formed between the two left and right telescopic members 4 and one end of the fixed portion of the portal upright 8 close to each other, and one end of the outer die web portion 1 is far away from each other, so as to form a stable support for the outer die web portion 1, and support the construction load of the bottom side plate unit 101 and the adjusting section side plate unit 102 of the outer die. The specific mast upright 8 fixing part may be an oil cylinder part of a hydraulic jack for the first mast upright and a lower section of the second mast upright for the second mast upright. The upper end and the lower end of the portal pole setting 8 are respectively connected with the outer side mould supporting longitudinal beam 6 and the bottom supporting longitudinal beam 10, the upper end and the lower end are respectively provided with a flange plate, and bolts penetrate through the flange plate and are screwed into the outer side mould supporting longitudinal beam 6 and the bottom supporting longitudinal beam 10, so that the upper end and the lower end are fixed. The left and right telescopic members 4 are electric push rods or hydraulic cylinders, and the embodiment selects the electric push rods.
Further, the top bearing support comprises an outer mould supporting longitudinal beam 6 and an outer mould supporting cross beam 5, the outer mould supporting longitudinal beam 6 is longitudinally connected to the top ends of the plurality of portal uprights 8, and the outer mould supporting cross beam 5 is vertically connected to the outer mould supporting longitudinal beam 6 and is provided with a track. The top bearing support is arranged to maintain the integrity of the top bearing support and the support portal, and the support strength of the rail and the top concrete is ensured. This top bearing structure, including the braced truss of outside mould flange form part 3 as supporting main rib, outside mould support longeron 6 and outside mould supporting beam 5 adopt light-duty shaped steel assembly to weld and support, cooperation outside mould slider 2, outside mould slider 2 can be by sideslip piece, bearing and gyro wheel are constituteed, the sideslip piece is connected with the gyro wheel through the bearing below, the track is provided with the slot that provides the gyro wheel and walk, prevent outside mould slider 2 break away from the track, the biggest sideslip of slider can reach 30cm to 45cm through the adjustment, the track internal fixation has spacing steel sheet, prevent outside mould slider 2 break away from the track outer end, sideslip driving force comes from controlling extensible member 4, under the steady circumstances of bottom support, control extensible member 4 telescopic drive outside mould flange form part 3 is based on outside mould slider 2 realizes controlling horizontal migration on the track. To the connection of portal pole setting 8 and outside mould support longeron 6, this embodiment provides a specific structure, to first portal pole setting, is provided with the screw thread on first portal pole setting top, is provided with the support nut in the bottom of outside mould support longeron 6, and first portal pole setting top and support nut 7 threaded connection realize the fixed of first portal pole setting and outside mould support longeron 6. And for the second portal pole, a stiffening plate is arranged at the top of the second portal pole, and the second portal pole and the outer side mold support longitudinal beam 6 are fixed by welding the stiffening plate.
The outer die replacing and clamping steps comprise the steps of releasing the connection between the top side plate unit 103 and the adjusting section side plate unit 102, retracting the left and right telescopic members 4 connected with the top bearing support, enabling the outer die flange plate part 3 and the top side plate unit 103 to move outwards by means of outer die sliding members, releasing the connection between the adjusting section side plate unit 102 and the bottom side plate unit 101, lifting the adjusting section side plate unit 102 away and lifting the adjusting section side plate unit 102 with reduced height to a replacement position, enabling the newly replaced adjusting section side plate unit 102 to be connected with the bottom side plate unit 101, enabling the left and right telescopic members 4 connected with the bottom side plate unit 101 to adjust the angle and/or supporting the door frame to adjust the height, enabling the newly replaced adjusting section side plate unit 102 to be attached with the top side plate unit 103, completing the connection fixation of the newly replaced adjusting section side plate unit 102 and the top side plate unit 103, adjusting the angle and the height of a bottom bearing mechanism, retracting the angle adjusting member 17 at the rear end part of the bottom supporting longitudinal beam 10, enabling the elevation angle and the height of the bottom die 32 to be matched with the designed beam bottom plate and the height, enabling the angle of the newly replaced adjusting section side plate unit 102 to be matched with the angle of the outer die flange plate part Duan Yiban and the outer die, and the die clamping position to be completed. The three steps of adjusting the angle and the height of the bottom bearing mechanism, adjusting the height of the supporting portal frame and contracting the angle adjusting piece 17 at the rear end part of the bottom supporting longitudinal beam 10 can be adjusted according to the situation, and the angle and the height of the bottom bearing mechanism and the height of the supporting portal frame can be adjusted simultaneously.
According to the actual construction situation, the sequence of partial steps can also be adjusted, for example, the specific steps can be that the angle of the bottom bearing mechanism is adjusted to enable the elevation angle of the bottom die 32 to be matched with the elevation angle of the bottom plate of the designed beam section, the angle adjusting piece 17 is adjusted to enable the supporting portal to be restored to the vertical state, the connection between the top side plate unit 103 and the adjusting side plate unit 102 is released, the left telescopic piece 3 and the right telescopic piece 3 connected with the top bearing supporting piece are contracted, the outer die flange template part 3 and the top side plate unit 103 move outwards by means of the outer die sliding piece 2, the connection between the adjusting side plate unit 102 and the bottom side plate unit 101 is released, the adjusting side plate unit 102 is lifted away, the adjusting side plate unit 102 with reduced height is lifted to the replacement position, the newly replaced adjusting side plate unit 102 is connected with the bottom side plate unit 101, the left telescopic piece 4 connected with the bottom side plate unit 101 is adjusted upwards, and/or the supporting portal is adjusted in height, the newly replaced adjusting side plate unit 102 is attached with the top side plate unit 103, the replacement of the new adjusting side plate unit 102 and the top side plate unit 103 is completed, the adjusting side plate unit 102 is connected with the bottom plate unit 103, the adjusting side plate 102 is lifted from the outer die side plate unit 101 is lifted, the height is matched with the designed beam section and the outer die flange part is matched with the height of the designed beam section, and the outer die flange part is matched with the height of the bottom plate Duan Yiban.
When the angle of the support portal is adjusted, the positions of the lower adjusting nut and the upper adjusting nut are adjusted, and the distance between the bottom support longitudinal beam 10 and the bottom bearing mechanism is changed, namely, the angle adjustment is realized. In the construction process of the invention, the lower adjusting nut and the upper adjusting nut are generally adjusted downwards due to the smaller inclination angle.
When the height of the supporting portal is adjusted, the height limitation of the telescopic supporting rod is relieved, the piston rod of the hydraulic jack is contracted, and the height of the telescopic supporting rod is locked after the piston rod of the hydraulic jack is adjusted in place, so that the height adjustment of the flange template part 3 of the outer side die is realized. .
When the newly replaced adjusting section side plate unit 102 is adjusted to be attached to the top side plate unit 103, the left and right telescopic members 4 connected to the fixed portion of the door frame stand bar 8 are rotated upward by a certain angle, and lifting of the outer side die web plate portion is achieved.
Furthermore, the tower crane can be used for lifting the adjusting section side plate unit to the replacement position from the adjusting section side plate unit with reduced height.
Meanwhile, as shown in fig. 4 and 5, the present embodiment provides a walking integrated machine structure for supporting the outer mold and the outer mold supporting mechanism, but the practical construction is not limited to the walking integrated machine structure provided in the present embodiment, that is, the bottom bearing mechanism for supporting the outer mold supporting mechanism can be provided, and the method of the present invention can be adopted to realize rapid replacement and mold assembly of the outer mold. The structure for supporting the above-mentioned formwork (hereinafter referred to as a walking integrated machine) used in this embodiment is described in detail below, and includes a supporting framework system, a formwork supporting system and a walking system, where the supporting framework system includes four upright posts 28, two lower walking beams 25, two upper spandrel posts 18, an upper front beam 19 and an upper rear beam 21, the upper ends of each of the two upright posts 28 are respectively connected with one of the upper spandrel posts 18, the lower ends are respectively connected with one of the lower walking beams 25, the front ends of the two upper spandrel posts 18 are connected through the upper front beam 19, the upper rear beam 21 is connected between the two upright posts 28 located on the front side, specifically, four upright posts 28, The two lower walking beams 25 and the two upper bearing beams 18 enclose a cubic frame, but the upper ends of the upright posts 28 are connected with the middle part of the upper bearing beams 18, the front parts of the upper bearing beams 18 extend out of the upright posts 28 to leave spaces for hanging a formwork support system positioned in front of the segments of the connecting beams 23 which are completed by construction, the formwork support system comprises a hanging mechanism, a bottom bearing mechanism and a formwork, the hanging mechanism comprises a front hanging strap 20 and a rear hanging strap 24, the front hanging strap 20 is at least provided with two, the upper ends are respectively connected with the upper bearing beams 18, the lower ends are connected with the front side of the bottom bearing mechanism, the rear hanging strap 24 is at least provided with two, the upper ends are respectively connected with the two ends of the upper rear cross beam 21, the lower ends are connected with the rear side of the bottom bearing mechanism, namely the front hanging strap 20 and the rear hanging strap 24 hang the whole bottom bearing mechanism so as to keep stable, and the bottom bearing mechanism is used for supporting the formwork, namely comprises the outer side mould of the embodiment, The bottom bearing mechanism comprises a lower front cross beam 15 and a lower rear cross beam 14, which are arranged on the front side and the rear side below the template, and shares the total weight, in the embodiment, the lower front cross beam 15 is connected with a front sling 20, the lower rear cross beam 14 is connected with a rear sling 24, an operation platform can be arranged in front of the lower front cross beam 15, around the lower rear cross beam 14 and between the outer side mold supporting longitudinal beams 6, which is convenient for constructors to operate, and can be welded on the lower front cross beam 15 according to construction requirements, The lower rear cross beam 14 and the outer mould support longitudinal beam 6 are at proper positions, the operation platform also depends on the suspension force of the front suspension belt 20 and the rear suspension belt 24, the support structure bottom mould longitudinal beam 12 below the bottom mould 32 is also arranged above the bottom bearing mechanism for providing an operation support surface for the bottom mould longitudinal beam, in the embodiment, the lower front end of the bottom mould longitudinal beam 12 is connected with the lower front cross beam 15, the lower rear end of the bottom mould longitudinal beam 12 is connected with the lower rear cross beam 14, and the running system can adopt rolling wheels to realize running, can also adopt a crawler structure driven by the rolling wheels to realize running, is arranged below the lower running beam 25 and is used for driving the whole running integrated machine to move forwards or backwards. in order to ensure the safety of construction, the embodiment is further provided with an anchor 27, and the anchor 27 is used for fixing the supporting framework system so as to prevent the whole running integrated machine from tilting forward, namely, the running integrated machine is kept balanced in the whole hoisting construction process. In the continuous beam construction process, since the front end of the walking integrated machine needs to hoist the formwork, the bottom bearing mechanism and the connecting beam 23 section in pouring, the front end needs to bear very large weight, and in order to solve the problem of large overturning risk, the anchor 27 is most suitable to be arranged at the rear end of the supporting framework system, and of course, the anchor 27 can be additionally arranged at the middle part or the front end of the supporting framework system and can be determined according to practical conditions. For the setting of the anchorage device, a counter-pressure beam 26 which is transversely arranged can be connected on the matched position of the lower walking beam 25, the counter-pressure beam 26 can be screwed into an anchorage device 27, the lower end of the anchorage device 27 can be fixed in a first anchorage device fixing piece 22 pre-buried in the continuous beam 23, and the upper end can be fixed through a second anchorage device fixing piece. The stress of the anchor 27 can be shared by the back-pressure beam, the anchor 27 can be made of a threaded steel rod, correspondingly, a nut can be embedded in the continuous beam 23 to serve as a first anchor fixing piece 22, and the nut is screwed into the upper end of the anchor 27 to serve as a second anchor fixing piece. With the above-mentioned walking integrated machine structure, the angle of the bottom bearing mechanism is adjusted by changing the height difference between the lower front beam 15 and the lower rear beam 14, and the height of the bottom bearing mechanism is adjusted by changing the hoisting lengths of the front sling 20 and the rear sling 24.
Claims (9)
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| JP2000265417A (en) * | 1999-03-12 | 2000-09-26 | Kawaju Koji Kk | Moving timbering construction method for bridge floor slab overhang section |
| JP4213827B2 (en) * | 1999-07-29 | 2009-01-21 | 株式会社北川鉄工所 | Joint structure of mobile formwork device |
| CN102199916B (en) * | 2011-04-12 | 2012-08-29 | 中铁三局集团有限公司 | Cradle for pouring bridge cantilever and construction method of cradle |
| CN202090289U (en) * | 2011-05-20 | 2011-12-28 | 湖南中铁五新钢模有限责任公司 | Shared type outer lateral template for straight web box girders with different heights |
| KR101259031B1 (en) * | 2012-10-16 | 2013-04-29 | 컨텍이앤씨 주식회사 | Form traveller having transversal frame, and launching method for the same |
| CN211389346U (en) * | 2019-11-08 | 2020-09-01 | 中交第四航务工程局有限公司 | Outer side template structure of large box girder |
| CN111778863B (en) * | 2020-07-20 | 2021-12-03 | 中铁大桥局第九工程有限公司 | Cantilever beam steel formwork system with adjustable cross slope |
| CN112482226B (en) * | 2020-11-19 | 2022-07-15 | 中铁大桥局集团有限公司 | Construction method for changing height and span length of upstroke movable formwork |
| CN113982258A (en) * | 2021-11-08 | 2022-01-28 | 广东省水利水电第三工程局有限公司 | Portal template structure and template system |
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| CN112900287A (en) * | 2021-03-11 | 2021-06-04 | 中铁十六局集团第五工程有限公司 | Cantilever perfusion bridge fabrication machine |
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