CN103498419A - Box girder steel core mould and construction method thereof - Google Patents
Box girder steel core mould and construction method thereof Download PDFInfo
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- CN103498419A CN103498419A CN201310488050.4A CN201310488050A CN103498419A CN 103498419 A CN103498419 A CN 103498419A CN 201310488050 A CN201310488050 A CN 201310488050A CN 103498419 A CN103498419 A CN 103498419A
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Abstract
The invention provides a box girder steel core mould and a construction method of the box girder steel core mould. The box girder steel core mould comprises a supporting frame system and an external formwork system. The supporting frame system is composed of multiple sets of parallel supporting frames. The external formwork system is composed of a plurality of formworks arranged outside the supporting frame system. According to the box girder steel core mould and the construction method of the box girder steel core mould, not only can the problems that a cast-in-place box girder core mould formwork is low in circulation utilization rate and large in material consumption be solved, but also the splicing way of steel formworks capable of being adjusted according to the size of the core mould can be supplied, rapid construction can be achieved, and meanwhile the utilization rate of the box girder core mould formworks can be improved. In addition, the overall width and the overall height can be adjusted by adjusting supporting rod nut screws, and the box girder steel core mould is very convenient to use and practical. Furthermore, the construction method can be achieved by splicing components in different sizes according to different types of core moulds, and the box girder steel core mould has wide applicability. Materials which are used are all conventional accessories, the machining difficulty is low, the box girder steel core mould is easy to use, and on-site construction and usage are facilitated.
Description
Technical field
The invention belongs to bridge construction auxiliary equipment technical field, particularly relate to a kind of case beam steel core and job practices thereof.
Background technology
Along with the develop rapidly of domestic communication transport service, the quantity of urban light rail is also increasing rapidly, because the bridge for setting up urban light rail has that longitudinal gradient is large, radius is little, height is than high, therefore determined that bridge top adopts the cast-in-situ box girder form more.Due to the superiority of cast-in-situ box girder, therefore enter more and more our job site in recent years, then in the construction, the constructor is being perplexed in the control of some important step always.Such as case beam core construction adopts the wooden form form at present usually, because this template exists that turnover rate is low, high material consumption, cost is high, the template formed precision is low and assembling and dissembling speed waits shortcoming slowly, therefore is unfavorable for the construction of cast-in-situ box-beam that circuit is longer.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of quality to meet the concrete construction process requirement; Site operation is easy, and work efficiency is high; Manufacture craft is feasible; Economic and practical, safe and reliable, as to be beneficial to rapid construction case beam steel core and job practices thereof.
In order to achieve the above object, case beam steel core provided by the invention comprises support frame system and outer template system; Wherein the support frame system is comprised of the support frame of multi-set parallel setting, every group of support frame is comprised of two root bottom part support frames, two side supports frameworks, a top braces framework, a lower supporting rod and two hounds, wherein the two ends of bottom support framework, side supports framework and top braces framework are formed with respectively connecting screw hole, two root bottom part support frames are symmetricly set on support frame two side lower parts, and the lower end of every side supports framework utilizes respectively connecting bolt to be fixed on the upper end of a root bottom part support frame; The top braces framework is horizontally disposed with, and two ends utilize respectively connecting bolt to be connected with the upper end of two side supports frameworks; Lower supporting rod is horizontally disposed with, and the two ends, left and right are separately installed with left-handed nut leading screw and right-handed nut's leading screw, and utilizes the lower supporting rod pivot pin to be connected to the lower end of two root bottom part support frames; Two hounds are symmetrical arranged, upper and lower side is separately installed with left-handed nut leading screw and right-handed nut's leading screw, and utilize the hound pivot pin to be connected between the bottom support framework lower end and side supports framework upper end of the same side, thus bottom support framework and side supports framework are interconnected; The outer template system is comprised of two lower angle moulds, two bottom flat-dies, two side angle moulds, two top flat-dies, two upper angle moulds, two upper flat-dies, two sidepiece wedge-shaped dies and a middle part wedge-shaped die, and wherein the middle part wedge-shaped die is arranged on the end face centre position of top braces framework in the support frame system; Two sidepiece wedge-shaped dies, two upper flat-dies, two upper angle moulds, two top flat-dies, two side angle moulds, two bottom flat-dies and two lower angle moulds are arranged on respectively on the lateral surface of the top braces framework end face that is positioned at wedge-shaped die both sides, middle part and side supports framework, bottom support framework successively, and adjacent regions connects successively.
Described lower supporting rod is tubular structure, and every end at least is formed with a lower supporting rod adjustment hole.
Described hound is tubular structure, and middle part at least is formed with a hound adjustment hole.
Described lower angle mould, bottom flat-die, side angle mould, top flat-die, upper angle mould, upper flat-die, sidepiece wedge-shaped die and middle part wedge-shaped die form by panel, frame and cross rib, and are formed with a plurality of frame connecting holes on frame.
In described outer template system, in each template and support frame system, between each support frame, adopt gib headed bolt to interconnect, between adjacent forms, utilize the mode of bolt-through frame connecting hole to interconnect.
Case beam steel core job practices provided by the invention comprises the following step carried out in order:
1) at first on smooth ground, by spacing, put side by side the lower supporting rod that many two ends are separately installed with left-handed nut leading screw and right-handed nut's leading screw;
2) the left-handed nut leading screw at every lower supporting rod two ends and the connecting hole on right-handed nut's leading screw are alignd with the connecting hole of two root bottom part support frame lower ends respectively, then utilize the lower supporting rod pivot pin to connect, thereby two root bottom part support frame symmetries are arranged on to the both sides of lower supporting rod;
3) lower end of two side supports frameworks is connected to the upper end of two root bottom part support frames by the connecting bolt symmetry;
4) two hounds of symmetrical installation, the hound that two upper and lower sides is separately installed with to left-handed nut leading screw and right-handed nut's leading screw utilizes the hound pivot pin to be connected between the bottom support framework bottom and side supports framework upper end of the same side, thus bottom support framework and side supports framework is interconnected;
5) the top braces framework is installed, its two ends are connected with the upper end of two side supports frameworks respectively by connecting bolt, make thus one group of support frame;
6) repeating step 2)-5), until make many groups support frame of requirement, form the support frame system;
7) side in above-mentioned support frame system is arranged on a lower angle mould by gib headed bolt the outside of bottom support framework;
8) upside at lower angle mould is arranged on the side supports framework outside by gib headed bolt by the bottom flat-die, utilizes the method that connecting bolt runs through the frame connecting hole that flat-die lower end, bottom and lower angle mould upper end are linked together simultaneously;
9) according to the method for step 8) the outside of side supports framework and top braces framework from flat-die upper end, bottom, start successively installation side angle mould, top flat-die, angle mould, on flat-die, sidepiece wedge-shaped die and middle part wedge-shaped die;
10) according to step 7)-9) the opposite side of support frame system install successively angle mould under another piece, bottom flat-die, side angle mould, top flat-die, on angle mould, on flat-die and sidepiece wedge-shaped die, in the outside outer template system that forms of support frame system, make case beam steel core thus simultaneously;
11) adopt crane that the integral hoisting of above-mentioned case beam steel core is arrived to assigned address, when it conflicts with case beam side and reinforcing bar generation, a reinforcing bar is penetrated in the lower supporting rod adjustment hole, rotate downward or upward lower supporting rod, when the total length of lower supporting rod and left-handed nut leading screw and right-handed nut's leading screw reaches the size of regulation, the nut screwing clamping on left-handed nut leading screw and right-handed nut's leading screw is fixed;
12) reinforcing bar is penetrated in the hound adjustment hole, to lower right or upper left side rotation hound, when the total length of hound and left-handed nut leading screw and right-handed nut's leading screw reaches the size of regulation, the nut screwing clamping on left-handed nut leading screw and right-handed nut's leading screw is fixed;
13) after case beam steel core is in place at its outside colligation top board reinforcing bar, then carry out concreting;
14) when concrete strength reaches design load, according to above-mentioned when assembled contrary order remove successively each parts on case beam steel core, complete thus whole work progress.
It is low that case beam steel core provided by the invention and job practices thereof not only can solve cast-in-situ box girder core template turnover utilization rate, the difficult problem of high material consumption, and a kind of assembled approach of regulating core size steel form is provided, it can improve the utilization rate of case beam core template in rapid construction.In addition, this device can be regulated integral width and height by the mode of regulating the stay nut leading screw, very convenient and practical.In addition, for different core forms, only need can solve according to the member of the assembled different size of model, there is applicability widely.This device material therefor is conventional accessory, and difficulty of processing is little, uses simply, and is conducive to the site operation use.
The accompanying drawing explanation
Fig. 1 is case beam steel core elevation provided by the invention.
Fig. 2 is lower supporting rod elevation in case beam steel core provided by the invention.
Fig. 3 is lower supporting rod lateral view in case beam steel core provided by the invention.
Fig. 4 is hound elevation in case beam steel core provided by the invention.
Fig. 5 is hound lateral view in case beam steel core provided by the invention.
Fig. 6 is template elevation in case beam steel core provided by the invention.
Fig. 7 is template lateral view in case beam steel core provided by the invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, case beam steel core provided by the invention and job practices thereof are elaborated.
Now take certain engineering describes as example: in No. 14 Xian Shigai city rail transit networks of certain city underground, one connects northeast, the key line of track traffic " L " type in southwest, this section viaduct mainly adopts all round victory support cast-in-place prestressed concrete box girder, standard span adopts 30m, cloth across the time take 30m as main, be aided with 17m, 23m, 25m, 25.5m, 26.5m, 26.7m adjusted, deck-molding is 1.8m, the case beam adopts the single box single chamber cross section, span centre web thickness 0.5m, roof and floor thickness 0.25m, top board haunch size 1.05*0.35m, edge of a wing root height 0.6m, end 0.2m.Because cast-in-situ box girder core size is various, adopt wooden form material turnover utilization rate low, cost is higher.Consider during construction that core adopts steel form assembling construction form, standard paragraphs is 1.5m, and the every end length of transition section is 5250mm, and core is furnished with 1.0m, 1.2m supernumerary segment, with this, reduces the cost of construction of cast-in-situ box-beam.
As shown in Fig. 1-Fig. 7, case beam steel core provided by the invention comprises support frame system and outer template system; Wherein the support frame system is comprised of the support frame of multi-set parallel setting, every group of support frame is comprised of two root bottom part support frames 1, two side supports frameworks 3, top braces framework 4, a lower supporting rod 17 and two hounds 21, wherein the two ends of bottom support framework 1, side supports framework 3 and top braces framework 4 are formed with respectively connecting screw hole, two root bottom part support frames 1 are symmetricly set on support frame two side lower parts, and the lower end of every side supports framework 3 utilizes respectively connecting bolt 2 to be fixed on the upper end of a root bottom part support frame 1; Top braces framework 4 is horizontally disposed with, and two ends utilize respectively connecting bolt 2 to be connected with the upper end of two side supports frameworks 3; Lower supporting rod 17 is horizontally disposed with, and the two ends, left and right are separately installed with left-handed nut leading screw 18 and right-handed nut's leading screw 15, and utilizes lower supporting rod pivot pin 14 to be connected to the lower end of two root bottom part support frames 1; Two hounds 21 are symmetrical arranged, upper and lower side is separately installed with left-handed nut leading screw 23 and right-handed nut's leading screw 20, and utilize hound pivot pin 19 to be connected between bottom support framework 1 lower end and side supports framework 3 upper ends of the same side, thus bottom support framework 1 and side supports framework 3 are interconnected; The outer template system is comprised of two lower angle moulds 13, two bottom flat-dies 12, two side angle moulds 10, two top flat-dies 9, two upper angle moulds 8, two upper flat-dies 5, two sidepiece wedge-shaped dies 6 and a middle part wedge-shaped die 7, and wherein middle part wedge-shaped die 7 is arranged on the end face centre position of top braces framework 4 in the support frame system; The upper angle mould of the upper flat-die of two sidepiece wedge-shaped dies 6, two 5, two 8, two top flat-dies 9, two side angle moulds 10, two bottom flat-dies 12 and two lower angle moulds 13 are arranged on respectively on the lateral surface of top braces framework 4 end faces that are positioned at wedge-shaped die 7 both sides, middle part and side supports framework 3, bottom support framework 1 successively, and adjacent regions connects successively.
Described lower supporting rod 17 is tubular structure, adopts φ 89*5 welded tube to make, and every end at least is formed with a lower supporting rod adjustment hole 16.
Described hound 21 is tubular structure, adopts φ 89*5 welded tube to make, and middle part at least is formed with a hound adjustment hole 22.
Described lower angle mould 13, bottom flat-die 12, side angle mould 10, top flat-die 9, upper angle mould 8, upper flat-die 5, sidepiece wedge-shaped die 6 and middle part wedge-shaped die 7 form by panel, frame and cross rib, panel all adopts the 4mm steel plate, frame adopts the 60*8 steel plate, cross rib adopts the 60*6 steel plate, and is formed with a plurality of frame connecting holes 24 on frame.
In described outer template system, in each template and support frame system, between each support frame, adopt gib headed bolt 11 to interconnect, between adjacent forms, utilize the mode of bolt-through frame connecting hole 24 to interconnect.
Case beam steel core job practices provided by the invention comprises the following step carried out in order:
1) at first on smooth ground, by spacing, put side by side the lower supporting rod 17 that many two ends are separately installed with left-handed nut leading screw 18 and right-handed nut's leading screw 15;
2) the left-handed nut leading screw 18 at every lower supporting rod 17 two ends and the connecting hole on right-handed nut's leading screw 15 are alignd with the connecting hole of two root bottom part support frame 1 lower ends respectively, then utilize lower supporting rod pivot pin 14 to connect, thereby two root bottom part support frame 1 symmetries are arranged on to the both sides of lower supporting rod 17;
3) lower end of two side supports frameworks 3 is connected to the upper end of two root bottom part support frames 1 by connecting bolt 2 symmetries;
4) two hounds 21 of symmetrical installation, the hound 21 that two upper and lower sides is separately installed with to left-handed nut leading screw 23 and right-handed nut's leading screw 20 utilizes hound pivot pin 19 to be connected between bottom support framework 1 bottom and side supports framework 3 upper ends of the same side, thus bottom support framework 1 and side supports framework 3 is interconnected;
5) top braces framework 4 is installed, its two ends are connected with the upper end of two side supports frameworks 3 respectively by connecting bolt 2, make thus one group of support frame;
6) repeating step 2)-5), until make many groups support frame of requirement, form the support frame system;
7) side in above-mentioned support frame system is arranged on a lower angle mould 13 by gib headed bolt 11 outside of bottom support framework 1;
8) upside at lower angle mould 13 is arranged on side supports framework 3 outsides by gib headed bolt 11 by bottom flat-die 12, utilizes the method that connecting bolt runs through frame connecting hole 24 that bottom flat-die 12 lower ends and lower angle mould 13 upper ends are linked together simultaneously;
9) according to the method for step 8) the outside of side supports framework 3 and top braces framework 4 from bottom flat-die 12 upper ends, start successively installation side angle mould 10, top flat-die 9, angle mould 8, on flat-die 5, sidepiece wedge-shaped die 6 and middle part wedge-shaped die 7;
10) according to step 7)-9) the opposite side of support frame system install successively angle mould 13 under another piece, bottom flat-die 12, side angle mould 10, top flat-die 9, on angle mould 8, on flat-die 5 and sidepiece wedge-shaped die 6, in the outside outer template system that forms of support frame system, make case beam steel core thus simultaneously;
11) adopt crane that the integral hoisting of above-mentioned case beam steel core is arrived to assigned address, when it conflicts with case beam side and reinforcing bar generation, φ 16 reinforcing bars are penetrated in lower supporting rod adjustment hole 16, rotate downward or upward lower supporting rod 17, when the total length of lower supporting rod 17 and left-handed nut leading screw 18 and right-handed nut's leading screw 15 reaches the size of regulation, purpose is to regulate the total length of whole case beam steel core, and the nut screwing clamping on left-handed nut leading screw 18 and right-handed nut's leading screw 15 is fixed;
12) φ 16 reinforcing bars are penetrated in hound adjustment hole 22, to lower right or upper left side rotation hound 21, when the total length of hound 21 and left-handed nut leading screw 23 and right-handed nut's leading screw 20 reaches the size of regulation, purpose is the overall height of regulating whole case beam steel core, and the nut screwing clamping on left-handed nut leading screw 23 and right-handed nut's leading screw 20 is fixed;
13) after case beam steel core is in place at its outside colligation top board reinforcing bar, then carry out concreting;
14) when concrete strength reaches design load, according to above-mentioned when assembled contrary order remove successively each parts on case beam steel core, complete thus whole work progress.
Claims (6)
1. a case beam steel core, it is characterized in that: it comprises support frame system and outer template system, wherein the support frame system is comprised of the support frame of multi-set parallel setting, every group of support frame is by two root bottom part support frames (1), two side supports frameworks (3), a top braces framework (4), a lower supporting rod (17) and two hounds (21) form, bottom support framework (1) wherein, the two ends of side supports framework (3) and top braces framework (4) are formed with respectively connecting screw hole, two root bottom part support frames (1) are symmetricly set on support frame two side lower parts, the lower end of every side supports framework (3) utilizes respectively connecting bolt (2) to be fixed on the upper end of a root bottom part support frame (1), top braces framework (4) is horizontally disposed with, and two ends utilize respectively connecting bolt (2) to be connected with the upper end of two side supports frameworks (3), lower supporting rod (17) is horizontally disposed with, and the two ends, left and right are separately installed with left-handed nut leading screw (18) and right-handed nut's leading screw (15), and utilizes lower supporting rod pivot pin (14) to be connected to the lower end of two root bottom part support frames (1), two hounds (21) are symmetrical arranged, upper and lower side is separately installed with left-handed nut leading screw (23) and right-handed nut's leading screw (20), and, between bottom support framework (1) lower end and side supports framework (3) upper end that utilize hound pivot pin (19) to be connected to be positioned at the same side, thus bottom support framework (1) and side supports framework (3) are interconnected, the outer template system is comprised of two lower angle moulds (13), two bottom flat-dies (12), two side angle moulds (10), two top flat-dies (9), two upper angle moulds (8), two upper flat-dies (5), two sidepiece wedge-shaped dies (6) and middle part wedge-shaped dies (7), and wherein middle part wedge-shaped die (7) is arranged on the end face centre position of top braces framework (4) in the support frame system, in the middle part of the upper flat-dies (5) of two sidepiece wedge-shaped dies (6), two, two upper angle moulds (8), two top flat-dies (9), two side angle moulds (10), two bottom flat-dies (12) and two lower angle moulds (13) are arranged on successively respectively and are positioned on the lateral surface of top braces framework (4) end face of wedge-shaped die (7) both sides and side supports framework (3), bottom support framework (1), and adjacent regions connects successively.
2. case beam steel core according to claim 1, it is characterized in that: described lower supporting rod (17) is tubular structure, and every end at least is formed with a lower supporting rod adjustment hole (16).
3. case beam steel core according to claim 1, it is characterized in that: described hound (21) is tubular structure, and middle part at least is formed with a hound adjustment hole (22).
4. case beam steel core according to claim 1, it is characterized in that: described lower angle mould (13), bottom flat-die (12), side angle mould (10), top flat-die (9), upper angle mould (8), upper flat-die (5), sidepiece wedge-shaped die (6) and middle part wedge-shaped die (7) form by panel, frame and cross rib, and are formed with a plurality of frame connecting holes (24) on frame.
5. case beam steel core according to claim 4, it is characterized in that: in described outer template system, in each template and support frame system, between each support frame, adopt gib headed bolt (11) to interconnect, between adjacent forms, utilize the mode of bolt-through frame connecting hole (24) to interconnect.
6. the job practices of a case beam steel core as claimed in claim 1, it is characterized in that: described job practices comprises the following step carried out in order:
1) at first on smooth ground, by spacing, put side by side the lower supporting rod (17) that many two ends are separately installed with left-handed nut leading screw (18) and right-handed nut's leading screw (15);
2) the left-handed nut leading screw (18) at every lower supporting rod (17) two ends and the connecting hole on right-handed nut's leading screw (15) are alignd with the connecting hole of two root bottom part support frame (1) lower ends respectively, then utilize lower supporting rod pivot pin (14) to connect, thereby two root bottom part support frame (1) symmetries are arranged on to the both sides of lower supporting rod (17);
3) lower end of two side supports frameworks (3) is connected to the upper end of two root bottom part support frames (1) by connecting bolt (2) symmetry;
4) symmetrical two hounds (21) of installing, between bottom support framework (1) bottom and side supports framework (3) upper end that the hound (21) that two upper and lower sides are separately installed with to left-handed nut leading screw (23) and right-handed nut's leading screw (20) utilizes hound pivot pin (19) to be connected to be positioned at the same side, thus bottom support framework (1) and side supports framework (3) are interconnected;
5) top braces framework (4) is installed, its two ends are connected with the upper end of two side supports frameworks (3) respectively by connecting bolt (2), make thus one group of support frame;
6) repeating step 2)-5), until make many groups support frame of requirement, form the support frame system;
7) side in above-mentioned support frame system is arranged on a lower angle mould (13) by gib headed bolt (11) outside of bottom support framework (1);
8) upside at lower angle mould (13) is arranged on side supports framework (3) outside by gib headed bolt (11) by bottom flat-die (12), utilizes the method that connecting bolt runs through frame connecting hole (24) that bottom flat-die (12) lower end and lower angle mould (13) upper end are linked together simultaneously;
9) according to the method for step 8) the outside of side supports framework (3) and top braces framework (4) from bottom flat-die (12) upper end, start successively installation side angle mould (10), top flat-die (9), angle mould (8), upper flat-die (5), sidepiece wedge-shaped die (6) and middle part wedge-shaped die (7);
10) according to step 7)-9) at the opposite side of support frame system, angle mould under another piece (13), bottom flat-die (12), side angle mould (10), top flat-die (9), upper angle mould (8), upper flat-die (5) and sidepiece wedge-shaped die (6) are installed successively, in the outside outer template system that forms of support frame system, make case beam steel core thus simultaneously;
11) adopt crane that the integral hoisting of above-mentioned case beam steel core is arrived to assigned address, when it conflicts with case beam side and reinforcing bar generation, a reinforcing bar is penetrated in lower supporting rod adjustment hole (16), rotate downward or upward lower supporting rod (17), when the total length of lower supporting rod (17) and left-handed nut leading screw (18) and right-handed nut's leading screw (15) reaches the size of regulation, the nut screwing clamping on left-handed nut leading screw (18) and right-handed nut's leading screw (15) is fixed;
12) reinforcing bar is penetrated in hound adjustment hole (22), to lower right or upper left side rotation hound (21), when the total length of hound (21) and left-handed nut leading screw (23) and right-handed nut's leading screw (20) reaches the size of regulation, the nut screwing clamping on left-handed nut leading screw (23) and right-handed nut's leading screw (20) is fixed;
13) after case beam steel core is in place at its outside colligation top board reinforcing bar, then carry out concreting;
14) when concrete strength reaches design load, according to above-mentioned when assembled contrary order remove successively each parts on case beam steel core, complete thus whole work progress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310488050.4A CN103498419A (en) | 2013-10-17 | 2013-10-17 | Box girder steel core mould and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310488050.4A CN103498419A (en) | 2013-10-17 | 2013-10-17 | Box girder steel core mould and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774561A (en) * | 2014-02-11 | 2014-05-07 | 湖北高路江南高速公路有限公司 | Streamline operation construction method of precast small box girders for highway in assembling mode |
| CN104372890A (en) * | 2014-11-07 | 2015-02-25 | 成龙建设集团有限公司 | Construction method of bare concrete prefabricated box beam with complicated structure |
| CN105113421A (en) * | 2015-09-16 | 2015-12-02 | 中铁十局集团第三建设有限公司 | Construction method for polishing outer mold of precast box beam |
| WO2021023245A1 (en) * | 2019-08-07 | 2021-02-11 | 上海建工二建集团有限公司 | Pile slab-type soil retaining wall integral casting formwork structure and construction method therefor |
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2013
- 2013-10-17 CN CN201310488050.4A patent/CN103498419A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774561A (en) * | 2014-02-11 | 2014-05-07 | 湖北高路江南高速公路有限公司 | Streamline operation construction method of precast small box girders for highway in assembling mode |
| CN103774561B (en) * | 2014-02-11 | 2016-01-20 | 中铁二十三局集团第八工程有限公司 | The job execution of speedway prefabricated small box girder frock method streamlined |
| CN104372890A (en) * | 2014-11-07 | 2015-02-25 | 成龙建设集团有限公司 | Construction method of bare concrete prefabricated box beam with complicated structure |
| CN105113421A (en) * | 2015-09-16 | 2015-12-02 | 中铁十局集团第三建设有限公司 | Construction method for polishing outer mold of precast box beam |
| WO2021023245A1 (en) * | 2019-08-07 | 2021-02-11 | 上海建工二建集团有限公司 | Pile slab-type soil retaining wall integral casting formwork structure and construction method therefor |
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Application publication date: 20140108 |