CN111188498B - Construction method of evacuation platform - Google Patents
Construction method of evacuation platform Download PDFInfo
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- CN111188498B CN111188498B CN202010037011.2A CN202010037011A CN111188498B CN 111188498 B CN111188498 B CN 111188498B CN 202010037011 A CN202010037011 A CN 202010037011A CN 111188498 B CN111188498 B CN 111188498B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
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Abstract
The invention discloses a construction method of an evacuation platform, which comprises the following steps: s-1, positioning a T-shaped frame of an evacuation platform, placing the T-shaped frame on a support frame, wherein the support frame can adjust the height of the T-shaped frame up and down and adjust the position of the T-shaped frame in a translation mode; s-2, paving a step plate of the evacuation platform; s-3, positioning and planting ribs on a base; s-4, closing the base; s-5, pouring the base, and pouring the base by adopting a cement-based grouting material; and S-6, removing the mold and checking. The evacuation platform is installed and constructed by adopting a reverse installation method from top to bottom, the T-shaped frame and the step plate are positioned and fixed firstly, then the base is poured, and meanwhile, the T-shaped frame and the base are connected. The invention has high installation precision, saves labor cost, ensures construction quality and can be widely applied to the technical field of traffic auxiliary facilities.
Description
Technical Field
The invention relates to the technical field of traffic auxiliary facilities, in particular to a construction method of an evacuation platform.
Background
The evacuation platform is used as a necessary accessory of subway engineering, plays an important role when a subway has an accident, and is constructed by mainly adopting a common reinforced concrete slab-steel structure bracket and a high-rise composite material, wherein the common reinforced concrete slab-steel structure bracket is mainly applied to the ground and an elevated section, and the common reinforced concrete slab-steel structure bracket is mainly applied to an underground tunnel section, and a set of special installation technologies are respectively formed according to the structural characteristics and the material characteristics of the common reinforced concrete slab-steel structure bracket and the high-rise composite material. The mounting technology of the existing subway elevated section evacuation platform mainly adopts the mounting mode from bottom to top by using a steel structure bracket and a reinforced concrete slab as platform forms: fix the base on ground or overhead bridge earlier with the structural support installation, lay the form of mating formation reinforced concrete slab to go on again, this kind of mode often can be because the base deviation appears when pouring the preparation, or deviation appears in pre-buried bolt, the support appears very easily because the hole site is not right and can not install and need punch again, or great deviation appears in the mounted position, make a large amount of landing slabs need cut the adjustment, can waste a large amount of manual works on the one hand, on the other hand influences the installation quality.
Disclosure of Invention
In order to solve the technical problems, reduce installation deviation, save labor cost and guarantee installation quality, the invention provides a construction method of an evacuation platform, which adopts the following technical scheme:
the construction method of the evacuation platform provided by the invention comprises the following steps: s-1, positioning a T-shaped frame of an evacuation platform, placing the T-shaped frame on a support frame, wherein the support frame can adjust the height of the T-shaped frame up and down and adjust the position of the T-shaped frame in a translation mode; s-2, paving the step plates of the evacuation platform, installing the step plates on two adjacent T-shaped frames after the number of the placed T-shaped frames reaches two or more, pre-fastening the step plates and the T-shaped frames through bolts, adjusting the heights of the T-shaped frames and the step plates up and down through a support frame, adjusting the positions of the T-shaped frames and the step plates through translation of the support frame, and locking the bolts; s-3, positioning the base and planting the ribs, determining the position of the base on the corresponding elevated bridge floor or ground after accurately confirming the plate surface elevation of the evacuation platform and the central point of the evacuation platform, and marking the position needing to be planted with the ribs; s-4, assembling the base, assembling the mold at the position of the base, and retesting the evacuation platform in precision; s-5, pouring the base, and pouring the base by adopting a cement-based grouting material; and S-6, removing the mold and checking.
And further, after the step S-6 is finished, the step S-7 is carried out, splicing seams are processed, gaps among the step plates and bolt hole positions are filled by adopting asphalt mortar or flexible mortar, and the filling time is not higher than the plane of the step plates.
Further, the support frame includes a plurality of perpendicular steel pipes and a plurality of horizontal steel pipe for the both ends of the horizontal steel pipe of support T type frame are installed through fastener and perpendicular steel pipe respectively.
Further, in the step S-3, the number and the length of the embedded bars meet the design requirements, and the distance between the top of the exposed part of the embedded bars and the bottom surface of the steel plate at the bottom of the T-shaped frame is not less than 15 mm.
Further, in the step S-3, U-shaped ribs or bolts are arranged in bolt holes in a steel plate at the bottom of the T-shaped frame.
Further, in the step S-4, the size of the mold is larger than that of the steel plate at the bottom of the T-shaped frame, and a grouting space for grouting materials is reserved between the mold and the steel plate.
Further, in the step S-5, the same batch of slurry is taken for forming and sample reserving, and curing is carried out under the same condition for judging the strength of stripping.
Further, in the step S-6, the test piece of the reserved sample is detected, and when the strength of the test piece reaches more than 30MPa, the mold and the support frame are removed.
And further, before the support frame is disassembled, the bolts and the nuts between the T-shaped frame and the base are fastened.
Further, after the bolt is fastened, the bolt is subjected to corrosion prevention treatment.
Has the advantages that: the evacuation platform is installed and constructed by adopting a reverse installation method from top to bottom, the T-shaped frame and the step plate are positioned and fixed firstly, then the base is poured, and meanwhile, the T-shaped frame and the base are connected. The invention has high installation precision, saves labor cost, ensures construction quality and can be widely applied to the technical field of traffic auxiliary facilities.
Drawings
FIG. 1 is a view showing a structure of a T-frame;
FIG. 2 is a structural view of the step plate;
fig. 3 is a front view of the evacuation platform;
fig. 4 is a structural view of the support frame.
Detailed Description
The present invention will be further described with reference to fig. 1 to 4.
The invention relates to a construction method of an evacuation platform, which comprises the following steps: s-1, positioning a T-shaped frame 11 of an evacuation platform; s-2, paving a step plate 12 of the evacuation platform; s-3, positioning and planting ribs on a base; s-4, closing the base; s-5, pouring a base; and S-6, removing the mold and checking.
Compared with the prior art, the invention ensures the mounting precision of the evacuation platform, improves the mounting efficiency, ensures that the position and the elevation of the T-shaped frame 11 of the evacuation platform meet the requirements, reduces or even does not need the problem of secondary processing such as cutting, punching and the like of the components caused by inaccuracy of the base and the embedded bolts thereon, has flexible construction, safety and reliability and high mounting precision and efficiency, and can meet the design requirements once.
In step S-1, the T-shaped frame 11 is placed on a support frame for measurement, the support frame can adjust the height of the T-shaped frame 11 up and down and adjust the position of the T-shaped frame 11 in a translational manner, so that the distance between the T-shaped frame 11 and the track and the elevation of the T-shaped frame 11 meet the requirements, and the distance between the T-shaped frame 11 along the track direction should be preliminarily positioned according to the span of the tread 12.
The support frame comprises a plurality of vertical steel pipes 13 and a plurality of horizontal steel pipes 14, the vertical steel pipes 13 and the horizontal steel pipes 14 are erected into a vertical frame, two ends of the horizontal steel pipes 14 used for supporting the T-shaped frame 11 are respectively installed with the vertical steel pipes 13 through fasteners, and the height of the horizontal steel pipes 14 and the position of the horizontal steel pipes 14 can be adjusted by loosening the fasteners.
In the step S-2, after the number of the T-shaped frames 11 reaches two or more, the step plates 12 are arranged on two adjacent T-shaped frames 11. Prefastening the stepping plate 12 and the T-shaped frame 11 through bolts, installing bolts according to the positions of embedded bolt sleeves at the top of the T-shaped frame 11, not fastening the bolts completely, limiting the stepping plate 12 only by realizing limitation, and conveniently adjusting the T-shaped frame 11 and the stepping plate 12. The heights of the T-shaped frame 11 and the step plate 12 are adjusted up and down through the support frame, the positions of the T-shaped frame 11 and the step plate 12 are adjusted through the support frame in a translation mode, the distance between the evacuation platform and the track and the elevation of the evacuation platform meet requirements, the bolts are locked, and the step plate 12 and the T-shaped frame 11 are fixed.
And S-3, after the plate surface elevation of the evacuation platform and the central point of the evacuation platform are accurately confirmed, determining the position of a base on the corresponding elevated bridge floor or ground according to the position of the bottom of the T-shaped frame 11, and marking the position needing to be subjected to bar planting according to the size of the base.
In the step S-3, the manufactured base is 400mm long and 400mm wide, and the distance between the bar planting position and the edge of the base is 50 mm. The quantity and the length of bar planting should satisfy the requirement of design, and 4 bar planting on every limit, reinforcing bar diameter 12mm plant foundation degree of depth 150mm, expose the length on ground and be not less than 150mm, simultaneously, the top at the position that the bar planting exposes is apart from 11 bottom steel sheet bottom surfaces of T type frame and is not less than 15 mm. If necessary, the exposed part of the tendon can be bent. The shear strength adopted during bar planting is not lower than 21N/m2The adhesive of (3).
In the step S-3, U-shaped ribs or bolts are arranged in bolt holes in a steel plate at the bottom of the T-shaped frame 11.
And S-4, assembling the mold at the base position, and before assembling the mold, performing scabbling and impurity cleaning treatment on the base surface. The height of the mould is flush with or slightly higher than the bottom surface of the steel plate at the bottom of the T-shaped frame 11, and a gap between the mould and the ground is blocked by adopting sealant or mortar, so that the phenomenon of slurry leakage during grouting is avoided.
In the step S-4, the size of the mold is larger than that of the steel plate at the bottom of the T-shaped frame 11, and a grouting space for grouting materials is reserved between the mold and the steel plate.
And S-4, retesting the precision of the evacuation platform, and pouring the base after the evacuation platform meets the requirements. If the precision does not meet the requirement in the retest process, the evacuation platform on the support frame can be moved to adjust until the requirement is met.
In the step S-5, the base is poured by adopting a cement-based grouting material, and the cement-based grouting material has micro-expansion performance, so that the formed base is prevented from being separated from the bottom plate or the base plane of the T-shaped frame 11. The slurry should completely submerge the reinforcing steel bars, and the pouring height of the slurry is slightly higher than the bottom surface of the steel plate at the bottom of the T-shaped frame 11, and the slurry is completely contacted with the steel plate at the bottom of the T-shaped frame 11.
And S-5, taking the same batch of slurry for molding and sample reservation, and performing curing under the same conditions for judging the strength of the stripping.
And S-6, after the grouting material is poured and cured for 24 hours, detecting a sample-remained test piece, dismantling the mold and the support frame when the strength of the test piece reaches more than 30MPa, and prolonging the curing time until the strength reaches 30MPa if the strength does not reach 30 MPa. Specifically, the compressive strength of the cement-based grouting material needs to reach more than 30MPa in 1 day and more than 80MPa in 28 days, and the mould and the support frame can be detached in the next day after pouring.
In the step S-6, before the support frame is disassembled, bolts and nuts between the T-shaped frame 11 and the base are fastened, and the support frame is disassembled after the T-shaped frame 11 is firmly installed.
And S-6, after the bolt is fastened, performing anticorrosive treatment on the bolt.
And S-6, after the mold and the support frame are disassembled, checking whether structural damage occurs to each component of the evacuation platform, whether the connection of the bolts is firm, replacing the damaged components, and fastening and supplementing the loose or missing bolts. The evacuation platform is inspected, the distance between the edge of the evacuation platform and the track and the elevation of the evacuation platform are measured, whether the comparison data meet the requirements or not is judged, and if the comparison data do not meet the requirements, each component is finely adjusted.
And S-7, splicing seams, filling gaps among the step plates 12 and bolt hole positions by adopting asphalt mortar or flexible mortar, wherein the gaps and the bolt hole positions are not higher than the plane of the step plates 12 during filling, and completely wrapping the bolts to protect the bolts.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (1)
1. The construction method of the evacuation platform is characterized by comprising the following steps:
s-1, positioning a T-shaped frame of an evacuation platform, placing the T-shaped frame on a support frame, wherein the support frame can adjust the height of the T-shaped frame up and down and adjust the position of the T-shaped frame in a translation mode;
s-2, paving the step plates of the evacuation platform, installing the step plates on two adjacent T-shaped frames after the number of the T-shaped frames reaches two or more, pre-fastening the step plates and the T-shaped frames through bolts, installing the bolts according to the positions of pre-embedded bolt sleeves at the tops of the T-shaped frames, not completely fastening the bolts, only realizing the limit of the step plates, conveniently adjusting the T-shaped frames and the step plates, adjusting the heights of the T-shaped frames and the step plates up and down through a support frame, adjusting the positions of the T-shaped frames and the step plates through translation of the support frame, enabling the distance between the evacuation platform and a track and the elevation of the evacuation platform to meet the requirements, locking the bolts, and fixing the step plates and the T-shaped frames;
s-3, positioning a base and planting ribs, determining the position of the base on a corresponding elevated bridge floor or ground after accurately confirming the plate surface elevation of the evacuation platform and the central point of the evacuation platform, marking the position needing to be planted with the ribs, wherein the number and the length of the planted ribs meet the design requirements, the distance between the top of the exposed part of the planted ribs and the bottom surface of a steel plate at the bottom of the T-shaped frame is not less than 15mm, and U-shaped ribs or bolts are arranged in bolt holes in the steel plate at the bottom of the T-shaped frame;
s-4, assembling the base, assembling a mold at the position of the base, retesting the evacuation platform with precision, wherein the size of the mold is larger than that of a steel plate at the bottom of the T-shaped frame, and a grouting space of grouting materials is reserved between the mold and the steel plate;
s-5, pouring a base, pouring the base by adopting a cement-based grouting material, taking the same batch of slurry for forming and reserving a sample, and performing curing under the same condition for judging the strength of form removal;
s-6, removing the mold, checking, detecting a sample left test piece, removing the mold and the support frame when the strength of the test piece reaches more than 30MPa, fastening bolts and nuts between the T-shaped frame and the base before removing the support frame, and performing anti-corrosion treatment on the bolts after fastening the bolts;
s-7, splicing seams are processed, gaps among the step plates and bolt hole positions are filled by asphalt mortar or flexible mortar, and the filling time is not higher than the plane of the step plates;
wherein, the support frame includes a plurality of vertical steel pipes and a plurality of horizontal steel pipes, and vertical steel pipe and horizontal steel pipe are set up into the derrick for the both ends of the horizontal steel pipe of support T type frame are installed through fastener and vertical steel pipe respectively, unclamp the height of the adjustable horizontal steel pipe of fastener and the position of horizontal steel pipe of translation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037011.2A CN111188498B (en) | 2020-01-14 | 2020-01-14 | Construction method of evacuation platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037011.2A CN111188498B (en) | 2020-01-14 | 2020-01-14 | Construction method of evacuation platform |
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| CN111188498A CN111188498A (en) | 2020-05-22 |
| CN111188498B true CN111188498B (en) | 2021-08-20 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20003403U1 (en) * | 2000-02-24 | 2000-06-21 | Ems Gleisbau Gmbh & Co Kg | Scraper for a platform edge foundation |
| CN103174155B (en) * | 2013-03-26 | 2015-02-18 | 中建保华建筑有限责任公司 | Reverse construction method of erecting steel column and pouring concrete foundation in sequential mode |
| CN103938538B (en) * | 2014-05-15 | 2016-03-23 | 中铁二院昆明勘察设计研究院有限责任公司 | Railroad bridge evacuation platform |
| KR101762374B1 (en) * | 2015-12-15 | 2017-07-27 | 현대건설 주식회사 | Method for constructing platform |
| CN105539458B (en) * | 2016-02-04 | 2018-06-15 | 北京天基新材料股份有限公司 | A kind of subway dispersing platform and its processing method |
| CN210003327U (en) * | 2019-04-03 | 2020-01-31 | 广州地铁设计研究院股份有限公司 | Elevated evacuation platform made of kinds of powder concrete |
| CN110016938B (en) * | 2019-05-21 | 2023-12-08 | 中铁建工集团有限公司 | Positioning and verticality adjusting device for rectangular lattice column of reverse construction method foundation pit |
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