CN104878924A - Stair step concrete pouring-molded template and stair cast-in-situ construction method - Google Patents
Stair step concrete pouring-molded template and stair cast-in-situ construction method Download PDFInfo
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- CN104878924A CN104878924A CN201510288653.9A CN201510288653A CN104878924A CN 104878924 A CN104878924 A CN 104878924A CN 201510288653 A CN201510288653 A CN 201510288653A CN 104878924 A CN104878924 A CN 104878924A
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Abstract
The invention discloses a stair step concrete pouring-molded template which is convenient to use and a stair cast-in-situ construction method using the template. The template comprises a rigid support structure, a vertical support structure and a stair step molding baffle plate group, wherein the rigid support structure comprises an upper horizontal plate, a lower horizontal part and a slope part connected between the upper horizontal part and the lower horizontal part; the upper horizontal part, the lower horizontal part and the slope part construct a rectangular framework seen from the vertical direction; the framework is provided with a hanging device; the front short edge and the back short edge which are opposite to each other on the framework are provided with adjustable positioning structures for positioning the framework in the horizontal direction respectively; the vertical support structure comprises liftable support legs which are arranged on the two corners of the upper horizontal part and the two corners of the lower horizontal part respectively; the stair step molding baffle plate group comprises a plurality of molding baffle plates which are fixed below the slope part through corresponding connection structures respectively and are arranged at uniform intervals in a step shape along the inclination direction of the slope.
Description
Technical field
The present invention relates to stair concrete-pouring moulding template, particularly relate to stair step concrete-pouring moulding template and use the stair cast-in-situ construction method of this template.
Background technology
Stair concrete-pouring moulding template is primarily of module of marking time, bed die module and side form module three part composition.This three part surrounds the die cavity for concreting, after the slurry in die cavity solidifies, then form stair.In above-mentioned three parts, module of marking time is used for the step part of marking time of shaping stair, therefore module of marking time also claims " step plate " usually, and term corresponding with it in the application is " stair step concrete-pouring moulding template ".Publication number is disclose a kind of step plate in the patent document of CN203878992U, be fixed by reinforcement assembly between this step plate and bed die module (being called gangboard in the document), described reinforcement assembly comprises reinforces steel pipe, split bolt and mountain type card, reinforcing steel pipe a pair is layed on step plate along gangboard direction, split bolt wears gangboard and step plate, and be placed between a pair reinforcing steel pipe, mountain type card wears split bolt and is placed on a pair reinforcing steel pipe, and split bolt both sides all screw togather fastening nuts gangboard and step plate.Above-mentioned this step plate is owing to carrying out Mulit-point Connection location by reinforcement assembly and gangboard, and therefore this step plate installing/dismounting is quite inconvenient, and step plate levelness not easily ensures, shaping stair step often width is uneven, highly also inconsistent.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of stair step concrete-pouring moulding template easy to use and employs the stair cast-in-situ construction method of this template.
Stair step concrete-pouring moulding template of the present invention comprises: rigidity supporting structure, the ramp that described rigidity supporting structure comprises horizontal part, lower horizontal part and is connected on this between horizontal part and lower horizontal part, described upper horizontal part, lower horizontal part and ramp form the rectangular frame from vertical direction, this framework is provided with erecting by overhang, and before and after on framework, two relative minor faces are respectively equipped with the adjustable location structure that framework is located in the horizontal direction; Vertical supporting structure, described vertical supporting structure comprises the liftable spike being installed on horizontal part two corner place and lower horizontal part two edge respectively, and when installing and using this stair step concrete shaping mould plate, described rigidity supporting structure is placed horizontally on the operation platform in building by these liftable spikes above-mentioned; Stair step damper for forming group, it is the damper for forming of stairstepping uniform intervals arrangement that described stair step damper for forming group comprises multiple being fixed on below described ramp and along the incline direction of this ramp through the syndeton of correspondence respectively, and the forming face of these damper for forming is consistent forward and towards upper horizontal part place one side.
Known from technique scheme, this template (refers to stair step concrete-pouring moulding template, rigidity supporting structure down together) has by upper horizontal part, the rectangular frame from vertical direction that lower horizontal part and ramp are formed, four edges of this framework are separately installed with liftable spike, framework is provided with erecting by overhang, before and after on framework, two relative minor faces are respectively equipped with the adjustable location structure that framework is located in the horizontal direction, it is the arrangement of stairstepping uniform intervals that multiple damper for forming is fixed on below described framework ramp and along the incline direction of this ramp through the syndeton of correspondence respectively, the forming face of these damper for forming is consistent forward and towards upper horizontal part place one side, therefore: the globality of this template is higher, the installation of template, dismounting all can realize overall handling by similar devices such as the cranes of job site, greatly improve the convenience that template uses, the framework of template has higher stiffness, and template location in the horizontal direction and the location on vertical direction realize by the liftable spike of the adjustable location structure on two minor faces relative before and after described framework and framework four edges respectively, thus the uniformity that stair step is shaping can be ensured preferably on the basis of guaranteeing the positioning precision between damper for forming and ramp.
Stair cast-in-situ construction method of the present invention, its step comprises: 1) guarantee that the landing at lower floor's stair corresponding to stair to be onstructed and stair two ends to be onstructed has been constructed complete, simultaneously, if set: the distance on stair construction joint reserved on each landing and this landing between immediate crossbeam center is as the first distance, distance between stair construction joint reserved on each landing and the terraced beam limit of corresponding stair to be onstructed is second distance, then, ensure that described second distance is 0.35 ~ 0.65 times of the first distance; 2) on the lower floor's stair corresponding to stair to be onstructed, the cast-in-place forming bottom die supporting component of stair is built, and on described stair cast-in-place forming bottom die supporting component, the cast-in-place forming bottom die of stair is installed, thus complete the installation location of the cast-in-place forming bottom die module of stair; 3) above the construction station above-mentioned stair step concrete-pouring moulding template being winched to stair place to be onstructed, transferring this template makes the liftable spike of horizontal part on it be supported on the landing of stair upper end to be onstructed, the liftable spike of lower horizontal part is supported on the landing of stair lower end to be onstructed, then the height of adjusting template and horizontal level, accurately fixes this template behind location; 4) the cast-in-place shaping side form module of stair is installed, the cast-in-place shaping side form module of described stair and stair cast-in-place forming bottom die module and template form the concreting forming recess of stair to be onstructed jointly, concreting is carried out to this die cavity, control each layer concrete slurry face height in die cavity and also guarantee that slurry does not overflow across the top edge of the forming face of corresponding damper for forming, to be shaped to after stair stripping, the cast-in-place shaping side form module of stair and the cast-in-place shaping side form module of stair again until concrete setting; Wherein, the upper horizontal clamp structure (a kind of preferred embodiment of adjustable location structure) acting on described framework one minor face is established in the upper end of the rigidity supporting structure of template during fixing described template, establish the lower horizontal clamp structure (a kind of preferred embodiment of adjustable location structure) acting on another minor face of framework in the lower end of rigidity supporting structure, by be clamped in before and after rigidity supporting structure described upper level to location structure and lower level to location structure between; First lower level is removed to location structure during stripping, after this promote to move after rigidity supporting structure to location structure by upper level mark time damper for forming group and established stair level of secondary stairs is thrown off.
The above-mentioned stair cast-in-situ construction method of the present invention is reserved stair construction joint rationally, ensure that the stability that stair step concrete-pouring moulding template is installed and working security; The installation of stair step concrete-pouring moulding template, the demoulding and dismounting are all very easy, facilitate the cast-in-place construction of stair; The framework of described template has higher stiffness, and template location in the horizontal direction and the location on vertical direction realize by the liftable spike of the adjustable location structure on two minor faces relative before and after described framework and framework four edges respectively, thus the uniformity that stair step is shaping can be ensured preferably on the basis of guaranteeing the positioning precision between damper for forming and ramp.
Below in conjunction with the drawings and specific embodiments, the present invention is described further.The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the perspective view of the application's stair step concrete-pouring moulding template detailed description of the invention.
The using state schematic diagram that Fig. 2 is template shown in Fig. 1.
Fig. 3 is the partial enlarged drawing at C place in Fig. 2.
Fig. 4 be in Fig. 1 A-A to sectional view.
Fig. 5 is the partial enlarged drawing at B place in Fig. 1.
Detailed description of the invention
Stair step concrete-pouring moulding template (calling in the following text " template ") as shown in Figure 1, its rigidity supporting structure 100 comprises horizontal part 110, lower horizontal part 130 and the ramp 120 be connected on this between horizontal part 110 and lower horizontal part 130, described upper horizontal part 110, lower horizontal part 130 and ramp 120 form the rectangular frame from vertical direction, this framework is provided with erecting by overhang 140, before and after on framework, two relative minor faces are respectively equipped with the adjustable location structure that framework is located in the horizontal direction, the vertical supporting structure 200 of this template comprises the liftable spike 210 being installed on horizontal part 110 liang of corners place and lower horizontal part 130 liang of edges respectively, it is the damper for forming 310 of stairstepping uniform intervals arrangement that the stair step damper for forming group 300 of this template comprises multiple being fixed on below described ramp 120 and along the incline direction of this ramp 120 through the syndeton 400 of correspondence respectively, the forming face 311a of these damper for forming 310 is consistent forward and towards upper horizontal part 110 place one side.
Need point out, above-mentioned " on ", D score, " front " be all based on coordinate axes indicated direction in Fig. 1.In addition, attribute " rectangle " in described above-mentioned rectangular frame also comprises similar other polygon rectangular, such as, rectangular relative two minor faces are designed to arc limit, angle between rectangular adjacent long edges and minor face are designed to fillet or are the polygon etc. of width wider than the width of ramp of upper horizontal part and lower horizontal part by Frame Design.
Said frame generally can adopt welded steel to make.In this embodiment, the left side beam body of upper horizontal part 110, lower horizontal part 130 and ramp 120 and right side beam body are all by channel-section steel and to be welded on the cross section that the steel plate on channel-section steel forms be the girder steel of rectangle, meanwhile, upper horizontal part 110 and the crossbeam lower horizontal part 130 being formed two minor faces relative before and after described framework are equally also be made up of channel-section steel and the steel plate be welded on channel-section steel.
As shown in Figure 1, in order to improve the rigidity of framework, described ramp 120 is also provided with the transversely strengthening structure 500 connecting described frame left beam body and right side beam body, this transversely strengthening structure 500 specifically can adopt steel pipe and directly be welded between left side beam body and right side beam body.In this embodiment, in whole ramp 120, only position is provided with a steel pipe in the middle, thus the left side beam body of ramp 120 and right side beam body is fixed.
As a kind of concrete form of above-mentioned syndeton 400, the syndeton 400 corresponding with damper for forming 310 comprises the relative connector being fixed on described ramp 120 left and right sides, the upper end of described connector is fixed on rectangular frame, and the lower end of connector connects damper for forming 310.In this embodiment, described connector is directly made up of the angle steel of certain length, and the upper end of angle steel is welded on rectangular frame, and lower end is then welded with damper for forming 310.
As shown in Fig. 1 to 5, in above-mentioned template, described each damper for forming 310 also further comprises front apron 311 and rear support component, described rear support component is a body structure 312 extended along front apron 311 length direction, a wherein side in relative two sides on this body structure 312 thickness direction is fixed on the trailing flank of another side and front apron 311 in syndeton 400 and fits fixing, and the leading flank of this front apron 311 is forming face 311a.Because damper for forming 310 implements supporting and location by the rear support component of above-mentioned body structure 312 to front apron 311, front apron 311 can be prevented substantially indeformable when the extruding being subject to concrete mortar, guarantee the Forming Quality of stair step.In view of current stair step generally by standard cuboid step linearly step by step upwards arrangement, therefore, described damper for forming 310 is also designed to accordingly: front apron 311 is rectangular slab, the profile of described body structure 312 is flat cuboid, the length direction of this front apron 311 and body structure 312 is consistent with the width of described rectangular frame, and the normal of described forming face 311a is in being horizontally disposed with.
As shown in Figure 3,4, in above-mentioned template, the top edge of described front apron 311 preferably flush with the end face of body structure 312 and the top edge of this front apron 311 lower than the distance c >=50mm of ramp 120 soffit; The lower limb of described front apron 311 is 30 ~ 50mm lower than the distance d of body structure 312 bottom surface.Like this, when carrying out concreting, after concrete grout face height flushes with the top edge of front apron 311, operator can insert floating instrument (bar of such as cuboid) from the gap between the lower limb of the gap between the top edge of front apron 311 and ramp 120 soffit and front apron 311 and body structure 312 bottom surface, compacting is carried out to stair step negative and positive Angle Position floating, thus improve the Forming Quality of concrete at stair step negative and positive Angle Position place and concrete strength.
As shown in Fig. 3 to 5, as the one more specifically structure of above-mentioned body structure 312, this body structure 312 is by rear portion channel-section steel 312a, upper steel lath 312b and sidepiece steel plate strip 312c is welded, described rear portion channel-section steel 312a is extended along front apron 311 length direction, the base plate of this rear portion channel-section steel 312a is welded in syndeton 400, the trailing flank of front apron 311 is welded on the front end face of rear portion channel-section steel 312a biside plate, between front apron 311 with syndeton 400, upper steel lath 312b is being welded higher than a distance above the channel-section steel 312a of rear portion, sidepiece steel plate strip 312c is welded respectively between channel-section steel 312a two ends, rear portion with upper steel lath 312b.Wherein, the biside plate of described rear portion channel-section steel 312a can the horizontal center line 311b of front apron 311 be symmetrical arranged up and down.Above-mentioned body structure 312 leaves the lower limb of front apron 311 and the distance d of this body structure 312 bottom surface, to insert floating instrument after concreting from the gap between the lower limb of front apron 311 and body structure 312 bottom surface, to carry out compacting to stair step inner corner trim position floating; Rear portion channel-section steel 312a, as the skeleton of body structure 312, facilitates the welding production of body structure 312, and the trailing flank of front apron 311 is directly welded on the front end face of rear portion channel-section steel 312a biside plate, ensure that the effective support of rear portion channel-section steel 312a to front apron 311; Upper steel lath 312b and sidepiece steel plate strip 312c carries out closing to the end face of body structure 312 and side and further enhances the integral rigidity of body structure 312.
As shown in Fig. 1 to 5, use the stair cast-in-situ construction method of above-mentioned stair step concrete-pouring moulding template, its step comprises: 1) guarantee that the landing at lower floor's stair corresponding to stair 700 to be onstructed and stair to be onstructed 700 two ends has been constructed complete, simultaneously, if set: the distance on stair construction joint reserved on each landing and this landing between immediate crossbeam center is as the first distance a, distance between stair construction joint reserved on each landing and the terraced beam limit of corresponding stair to be onstructed 700 is second distance b, then, ensure that described second distance b is 0.35 ~ 0.65 times of the first distance a, 2) on the lower floor's stair corresponding to stair 700 to be onstructed, the cast-in-place forming bottom die supporting component 820 of stair is built, and on described stair cast-in-place forming bottom die supporting component 820, the cast-in-place forming bottom die 800 of stair is installed, thus complete the installation location of the cast-in-place forming bottom die module 800 of stair, 3) above the construction station above-mentioned template being winched to stair 700 place to be onstructed, transferring this template makes the liftable spike 210 of horizontal part 110 on it be supported on the landing of stair 700 upper end to be onstructed, the liftable spike 210 of lower horizontal part 130 is supported on the landing of stair 700 lower end to be onstructed, then the height of adjusting template and horizontal level, accurately fixes this template behind location, 4) the cast-in-place shaping side form module of stair is installed, the cast-in-place shaping side form module of described stair and stair cast-in-place forming bottom die module 800 and template form the concreting forming recess of stair 700 to be onstructed jointly, concreting is carried out to this die cavity, control each layer concrete in die cavity and starch face height (see Fig. 3, label 710 in 4, dotted line shown in 720, it represents the concrete grout face of adjacent two layers stair) and guarantee that slurry does not overflow across the top edge of the forming face 311a of corresponding damper for forming 310, to adopt again after concreting and floating instrument inserts in the gap between the lower limb of gap between the top edge of each front apron 311 with corresponding ramp 120 soffit and each front apron 311 with corresponding body structure 312 bottom surface respectively, thus it is floating to shaping stair step negative and positive Angle Position being carried out manual compaction, stripping is again shaped to after stair until concrete setting, the cast-in-place shaping side form module of stair and the cast-in-place shaping side form module 800 of stair, wherein, the upper horizontal clamp structure 610 acting on described framework one minor face is established in the upper end of the rigidity supporting structure 100 of template during fixing described template, establish the lower horizontal clamp structure 620 acting on another minor face of framework in the lower end of rigidity supporting structure 100, by be clamped in before and after rigidity supporting structure 100 described upper level to location structure 610 and lower level to location structure 620 between, first lower level being removed to location structure 620 during stripping, after this being thrown off with established stair level to moving secondary stairs damper for forming group 300 of marking time after location structure 610 promotes rigidity supporting structure 100 by upper level.
As shown in Figure 2, upper horizontal clamp structure 610 in said method and lower horizontal clamp structure 620 all can adopt the support bar that can stretch, one end of support bar is withstood the minor face of associated frame members, the other end withstands the constructed body of wall closed on this minor face, the support bar of stair step concrete-pouring moulding template upper end and the support bar of template lower end act on the contrary horizontal thrust in upper and lower two minor face of framework a pair direction respectively, thus by be clamped in before and after rigidity supporting structure 100 described upper level to location structure 610 and lower level to location structure 620 between.First the support bar of below is removed during stripping, then regulate the support bar of top thus move secondary stairs damper for forming group 300 of marking time after promoting stair step concrete-pouring moulding template and throw off with established stair level.
Claims (10)
1. stair step concrete-pouring moulding template, is characterized in that, comprising:
Rigidity supporting structure (100), the ramp (120) that described rigidity supporting structure (100) comprises horizontal part (110), lower horizontal part (130) and is connected between horizontal part on this (110) and lower horizontal part (130), described upper horizontal part (110), lower horizontal part (130) and ramp (120) form the rectangular frame from vertical direction, this framework is provided with erecting by overhang (140), and before and after on framework, two relative minor faces are respectively equipped with the adjustable location structure that framework is located in the horizontal direction;
Vertical supporting structure (200), described vertical supporting structure (200) comprises the liftable spike (210) being installed on horizontal part (110) two corner place and lower horizontal part (130) two edge respectively, and when installing and using this stair step concrete shaping mould plate, described rigidity supporting structure (100) is placed horizontally on the operation platform in building by these liftable spikes (210) above-mentioned;
Stair step damper for forming group (300), described stair step damper for forming group (300) comprises and is multiplely fixed on described ramp (120) below through the syndeton (400) of correspondence respectively and be the damper for forming (310) of stairstepping uniform intervals arrangement along the incline direction of this ramp (120), and the forming face (311a) of these damper for forming (310) is unanimously forward and towards upper horizontal part (110) place one side.
2. template as claimed in claim 1, it is characterized in that: described damper for forming (310) comprises front apron (311) and rear support component, described rear support component is a body structure (312) extended along front apron (311) length direction, a wherein side in relative two sides on this body structure (312) thickness direction is fixed on the trailing flank of another side and front apron (311) in syndeton (400) and fits fixing, and the leading flank of this front apron (311) is forming face (311a).
3. template as claimed in claim 2, is characterized in that: the top edge of described front apron (311) flush with the end face of body structure (312) and the top edge of this front apron (311) lower than distance (the c) >=50mm of ramp (120) soffit; The lower limb of described front apron (311) is 30 ~ 50mm lower than the distance (d) of body structure (312) bottom surface.
4. template as claimed in claim 2 or claim 3, it is characterized in that: described front apron (311) is rectangular slab, the profile of described body structure (312) is flat cuboid, the length direction of this front apron (311) and body structure (312) is consistent with the width of described rectangular frame, and the normal of described forming face (311a) is in being horizontally disposed with.
5. template as claimed in claim 4, it is characterized in that: described body structure (312) is by rear portion channel-section steel (312a), upper steel lath (312b) and sidepiece steel plate strip (312c) are welded, described rear portion channel-section steel (312a) is extended along front apron (311) length direction, the base plate of this rear portion channel-section steel (312a) is welded in syndeton (400), the trailing flank of front apron (311) is welded on the front end face of rear portion channel-section steel (312a) biside plate, be positioned between front apron (311) with syndeton (400) welding upper steel lath (312b) higher than a distance, rear portion channel-section steel (312a) top, sidepiece steel plate strip (312c) is welded respectively between rear portion channel-section steel (312a) two ends with upper steel lath (312b).
6. template as claimed in claim 5, is characterized in that: the biside plate at described rear portion channel-section steel (312a) is symmetrical arranged up and down with the horizontal center line of front apron (311) (311b).
7. as the template in claims 1 to 3 as described in any one claim, it is characterized in that: the syndeton (400) corresponding with damper for forming (310) comprises the relative connector being fixed on described ramp (120) left and right sides, the upper end of described connector is fixed on rectangular frame, and the lower end of connector connects damper for forming (310).
8. as the template in claims 1 to 3 as described in any one claim, it is characterized in that: the ramp (120) of described rigidity supporting structure (100) is provided with the transversely strengthening structure (500) connecting described frame left beam body and right side beam body.
9. stair cast-in-situ construction method, its step comprises:
1) guarantee that the landing at lower floor's stair corresponding to stair to be onstructed (700) and stair to be onstructed (700) two ends has been constructed complete, simultaneously, if set: the distance on stair construction joint reserved on each landing and this landing between immediate crossbeam center is as the first distance (a), distance between stair construction joint reserved on each landing and the terraced beam limit of corresponding stair to be onstructed (700) is second distance (b), then, ensure that described second distance (b) is 0.35 ~ 0.65 times of the first distance (a);
2) on the lower floor's stair corresponding to stair to be onstructed (700), build the cast-in-place forming bottom die supporting component (820) of stair, and at described stair cast-in-place forming bottom die supporting component (820) the upper installation cast-in-place forming bottom die of stair (800), thus complete the installation location of the cast-in-place forming bottom die module (800) of stair;
3) above the construction station template in claim 1 to 7 described in any one claim being winched to stair to be onstructed (700) place, transferring this template makes the liftable spike (210) of horizontal part on it (110) be supported on the landing of stair to be onstructed (700) upper end, the liftable spike (210) of lower horizontal part (130) is supported on the landing of stair to be onstructed (700) lower end, then the height of adjusting template and horizontal level, accurately fixes this template behind location;
4) the cast-in-place shaping side form module of stair is installed, the cast-in-place shaping side form module of described stair and stair cast-in-place forming bottom die module (800) and template form the concreting forming recess of stair to be onstructed (700) jointly, concreting is carried out to this die cavity, control each layer concrete slurry face height in die cavity and also guarantee that slurry does not overflow across the top edge of the forming face (311a) of corresponding damper for forming (310), to be shaped to after stair stripping, the cast-in-place shaping side form module of stair and the cast-in-place shaping side form module (800) of stair again until concrete setting;
Wherein, establish in the upper end of the rigidity supporting structure (100) of template the upper horizontal clamp structure (610) acting on described framework one minor face during fixing described template, establish the lower horizontal clamp structure (620) acting on another minor face of framework in the lower end of rigidity supporting structure (100), by be clamped in before and after rigidity supporting structure (100) described upper level to location structure (610) and lower level to location structure (620) between; First lower level being removed to location structure (620) during stripping, after this being thrown off to moving mark time damper for forming group (300) and established stair level of secondary stairs after location structure (610) promotes rigidity supporting structure (100) by upper level.
10. method as claimed in claim 9, it is characterized in that: when template is for template described in claim 3, to adopt again after concreting and floating instrument inserts in the gap between the lower limb of gap between the top edge of each front apron (311) with corresponding ramp (120) soffit and each front apron (311) with corresponding body structure (312) bottom surface respectively, thus floating to shaping stair step negative and positive Angle Position being carried out manual compaction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510288653.9A CN104878924A (en) | 2015-05-29 | 2015-05-29 | Stair step concrete pouring-molded template and stair cast-in-situ construction method |
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| CN201510288653.9A CN104878924A (en) | 2015-05-29 | 2015-05-29 | Stair step concrete pouring-molded template and stair cast-in-situ construction method |
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| CN108729668A (en) * | 2018-07-24 | 2018-11-02 | 黄丽明 | A kind of stair template for building construction |
| CN114033173A (en) * | 2021-12-15 | 2022-02-11 | 山东长泰建设集团工程有限公司 | Cast-in-place stair steel-wood composite formwork based on BIM technology |
| CN114278026A (en) * | 2022-01-11 | 2022-04-05 | 华神建设集团有限公司 | Construction method of large-span cast-in-situ special-shaped stair |
| CN114278026B (en) * | 2022-01-11 | 2024-04-26 | 华神建设集团有限公司 | Construction method of large-span cast-in-situ special-shaped stairway |
| CN114319852A (en) * | 2022-01-20 | 2022-04-12 | 深圳市嘉盛建筑工程有限公司 | Aluminum alloy totally-enclosed stair template |
| CN114319852B (en) * | 2022-01-20 | 2023-04-14 | 深圳市嘉盛建筑工程有限公司 | Aluminum alloy totally-enclosed stair template |
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