CN113512958A - Cast-in-place concrete small-section box culvert one-step forming method - Google Patents
Cast-in-place concrete small-section box culvert one-step forming method Download PDFInfo
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- CN113512958A CN113512958A CN202110506546.4A CN202110506546A CN113512958A CN 113512958 A CN113512958 A CN 113512958A CN 202110506546 A CN202110506546 A CN 202110506546A CN 113512958 A CN113512958 A CN 113512958A
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- pouring
- template
- concrete
- cushion layer
- cast
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
Abstract
The invention relates to the technical field of engineering construction, in particular to a cast-in-place concrete small-section box culvert one-step forming method, which comprises the following steps: pouring a cushion layer, binding reinforcing steel bars of a bottom plate, side walls and a top plate, erecting a template, pouring concrete, maintaining, dismantling the template, pouring C20 concrete on a base cushion layer, binding the reinforcing steel bars of the bottom plate, the side walls and the top plate after the cushion layer is solidified to meet the design requirement, assembling the template on site by adopting an aluminum alloy template, fixing the lower end of the template with the poured cushion layer through expansion bolts, pouring concrete after the template is erected, pouring the bottom plate and part of the side walls firstly, pouring the rest of the side walls, and pouring the top plate finally; after pouring is finished, a film is adopted to cover in time and maintenance is carried out; and (4) dismantling the template after the concrete strength meets the design requirement. The invention adopts a one-time pouring forming construction method, shortens the construction period, and avoids the construction defects of construction joint reservation, no joint, slab staggering and the like.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to a method for forming a cast-in-place concrete small-section box culvert in one step.
Background
The construction procedure of the existing totally-enclosed box culvert concrete pouring is that a bottom plate and part of side walls are poured firstly, the rest part of side walls and the rest part of top plates are poured again after concrete is formed, so that the concrete pouring needs to be carried out twice on one section of box culvert, a large amount of time is consumed, waterproof treatment needs to be specially carried out on joints of the two pouring, and the hidden danger of water leakage exists in the subsequent use engineering.
Therefore, there is a need for improvements in the prior art.
Disclosure of Invention
In order to overcome the defects in the prior art, the method for forming the cast-in-place concrete box culvert with the small section at one time is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
a cast-in-place concrete small-section box culvert one-step forming method comprises the following steps:
s1, pouring a cushion layer; pouring the base cushion layer by using C20 concrete, and vibrating the concrete;
s2, binding steel bars of the bottom plate, the side wall and the top plate; after the cushion layer is solidified and meets the design requirement, binding the reinforcing steel bars of the bottom plate, the side wall and the top plate according to the design drawing;
s3, template assembly; the template is an aluminum alloy template, screw holes are formed in the joints of the template, the template is assembled through the screw holes during field installation, the lower end of the template is fixed with a poured cushion layer through expansion bolts, the template is prevented from floating in the concrete pouring process, the aluminum alloy template comprises an inner mold and an outer mold, a supporting structure is arranged in the inner mold, and vibrating openings of 10cm to 10cm are reserved at the lower end of the inner mold every 90 cm;
s4, pouring concrete, namely pouring the bottom plate and part of the side walls, pouring the rest side walls, and pouring the top plate;
s5, after pouring is completed, covering with a film in time and maintaining;
and S6, removing the template after the concrete strength meets the design requirement.
Further, in the step S1, the concrete vibrating time is 20 to 30 seconds.
Further, in S3, a support rod is disposed between the lower end of the inner mold and the cushion layer, and a split bolt is disposed between the side wall of the inner mold and the side wall of the outer mold.
Further, in the step S4, the slump of the cast concrete is 150 ± 20 mm.
Further, in S4, the concrete is poured in layers, the pouring thickness of each layer is controlled to be about 30cm, and each layer is poured, the concrete is required to be vibrated sufficiently, so as to ensure compactness.
Furthermore, the side wall of the aluminum alloy outer die is connected with a bracket for keeping the structure of the outer die stable.
Compared with the prior art, the invention has the following beneficial effects:
1. the construction process is simple, and construction period is shortened, and compared with the traditional pouring construction process, construction period is shortened by nearly half, and labor input is correspondingly reduced.
2. The engineering quality is improved, and the hidden danger of water leakage is reduced. In the traditional construction method, the two-time concrete pouring joint surface needs special treatment such as cleaning, water stopping sheet embedding by brushing cement slurry and the like, water leakage at the construction joint is prevented in the use process, the construction method adopting one-time pouring forming avoids the setting of the construction joint, the hidden danger of water leakage is reduced, and the engineering quality is improved.
3. During construction, one-time steel bar binding and formwork erecting are adopted, one-time pouring is completed, and the engineering defects of seams and staggered platforms generated during two-time pouring are avoided.
Drawings
The following will explain embodiments of the present invention in further detail through the accompanying drawings.
FIG. 1 is a schematic view of an aluminum alloy template structure.
In the figure: 1-template, 11-inner mold, 12-outer mold, 13-vibrating port, 14-support rod, 15-split bolt, 2-expansion bolt and 3-cushion layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1, a method for one-step forming of a cast-in-place concrete box culvert with a small cross section comprises the following steps:
s1, pouring a cushion layer; pouring C20 concrete for the base cushion layer, and vibrating the concrete for 20-30 s;
s2, binding the bottom plate, the side wall and the top plate steel bars, and binding the bottom plate, the side wall and the top plate steel bars after the cushion layer is solidified and meets the design requirement;
s3, template assembly; the template 1 is an aluminum alloy template, a certain number of screw holes are reserved at the joint by utilizing the characteristics of high rigidity and plasticity of the aluminum alloy template during template design, the aluminum alloy template is assembled through the screw holes during field installation, the lower end of the template is fixed with a poured cushion layer 3 through expansion bolts 2, the template 1 is prevented from integrally floating upwards in the concrete pouring process, the aluminum alloy template comprises an inner mold 11 and an outer mold 12, a vibration port 13 of 10cm x 10cm is reserved at the lower end of the inner mold 11 every 90cm, the bottom plate concrete is conveniently vibrated during pouring of the bottom plate, the compactness of the bottom plate concrete is ensured, and the quality defects of honeycomb pitted surface and the like after template removal are avoided;
a support rod 14 is arranged between the lower end of the inner die 11 and the cushion layer 3, and a split bolt 15 is arranged between the side wall of the inner die 11 and the side wall of the outer die 12;
s4, pouring concrete, namely pouring the bottom plate and part of the side walls, pouring the rest side walls, and pouring the top plate; the pouring sequence and the vibrating method of the concrete are strictly controlled, the concrete is poured in layers, the pouring thickness of each layer is controlled to be about 30cm, and the concrete is required to be sufficiently vibrated and compact when each layer is poured.
S5, after pouring is completed, covering with a film in time and maintaining;
and S6, removing the template after the concrete strength meets the design requirement.
The slump of the poured concrete is 150 +/-20 mm.
The side wall of the aluminum alloy outer mold is connected with a bracket 4 for keeping the structure of the outer mold stable.
The method is suitable for concrete pouring of the small box culvert structure with the structure height less than 2.5m and the bottom plate thickness less than 300mm, and when the concrete is poured, the small box culvert structure is poured once, so that the construction period is shortened, the defects of construction quality such as construction joint reservation, joint, slab staggering and the like are avoided, and the application range is wide.
Although only the preferred embodiments of the present invention have been described in detail, 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, and all changes are encompassed in the scope of the present invention.
Claims (6)
1. A cast-in-place concrete small-section box culvert one-step forming method is characterized by comprising the following steps: the method comprises the following steps:
s1, pouring a cushion layer; pouring the base cushion layer by using C20 concrete, and vibrating the concrete;
s2, binding the bottom plate, the side wall and the top plate steel bars, and binding the bottom plate, the side wall and the top plate steel bars after the cushion layer is solidified and meets the design requirement;
s3, template assembly; the template is an aluminum alloy template, screw holes are formed in the joints of the template, the template is assembled through the screw holes during field installation, the lower end of the template is fixed with a poured cushion layer through expansion bolts, the template is prevented from floating in the concrete pouring process, the aluminum alloy template comprises an inner mold and an outer mold, a supporting structure is arranged in the inner mold, and vibrating openings of 10cm to 10cm are reserved at the lower end of the inner mold every 90 cm;
s4, pouring concrete, namely pouring the bottom plate and part of the side walls, pouring the rest side walls, and pouring the top plate;
s5, after pouring is completed, covering with a film in time and maintaining;
and S6, removing the template after the concrete strength meets the design requirement.
2. The one-step forming method of the cast-in-place concrete small-section box culvert according to claim 1, characterized by comprising the following steps of: and in the step S1, the concrete vibrating time is 20-30S.
3. The one-step forming method of the cast-in-place concrete small-section box culvert according to claim 1, characterized by comprising the following steps of: and in the S3, a support rod is arranged between the lower end of the inner die and the cushion layer, and a split bolt is arranged between the side wall of the inner die and the side wall of the outer die.
4. The one-step forming method of the cast-in-place concrete small-section box culvert according to claim 1, characterized by comprising the following steps of: and in the step S4, the slump of the poured concrete is 150 +/-20 mm.
5. The one-step forming method of the cast-in-place concrete small-section box culvert according to claim 1, characterized by comprising the following steps of: in S4, the concrete is poured in layers, the pouring thickness of each layer is controlled to be about 30cm, and each layer is poured, the concrete is required to be vibrated fully, and compactness is guaranteed.
6. The one-step forming method of the cast-in-place concrete small-section box culvert according to claim 3, characterized by comprising the following steps of: the side wall of the aluminum alloy outer mold is connected with a bracket for keeping the structure of the outer mold stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110506546.4A CN113512958A (en) | 2021-05-10 | 2021-05-10 | Cast-in-place concrete small-section box culvert one-step forming method |
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| CN202110506546.4A CN113512958A (en) | 2021-05-10 | 2021-05-10 | Cast-in-place concrete small-section box culvert one-step forming method |
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Citations (10)
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|---|---|---|---|---|
| KR20130121281A (en) * | 2012-04-27 | 2013-11-06 | 장영미 | Apparatus for a in-line mold of precast concrete culverts and method for producing precast concrete culverts |
| CN105064398A (en) * | 2015-08-19 | 2015-11-18 | 中国能源建设集团天津电力建设有限公司 | One-time overall pouring construction method for nuclear powder single-hole GD gallery |
| CN205242436U (en) * | 2015-08-18 | 2016-05-18 | 上海建工七建集团有限公司 | Supplementary soleplate traded interim bearing structure who props during system was gone along with sb. to guard him to underground complex |
| CN107859061A (en) * | 2017-10-11 | 2018-03-30 | 中国市政工程中南设计研究总院有限公司 | A kind of construction method of box culvert primary concreting |
| CN108914965A (en) * | 2018-08-11 | 2018-11-30 | 中冶重工（唐山）有限公司 | The continuous construction method of aluminum alloy mould plate for pipe gallery |
| CN210946533U (en) * | 2019-06-25 | 2020-07-07 | 中铁八局集团建筑工程有限公司 | A closed channel structure for open cut construction |
| CN111608248A (en) * | 2020-05-20 | 2020-09-01 | 中电建十一局工程有限公司 | Cast-in-situ rainwater cover plate channel construction method |
| CN112127386A (en) * | 2020-09-29 | 2020-12-25 | 长沙开湖设备有限公司 | Underground piping lane construction is with supplementary creeping formwork system |
| CN212405396U (en) * | 2020-04-26 | 2021-01-26 | 山东省高速路桥养护有限公司 | Adjustable steel template |
| CN212866233U (en) * | 2020-06-04 | 2021-04-02 | 广州市公路工程公司 | Recoverable gasbag mould suitable for slot formula ditch |
-
2021
- 2021-05-10 CN CN202110506546.4A patent/CN113512958A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130121281A (en) * | 2012-04-27 | 2013-11-06 | 장영미 | Apparatus for a in-line mold of precast concrete culverts and method for producing precast concrete culverts |
| CN205242436U (en) * | 2015-08-18 | 2016-05-18 | 上海建工七建集团有限公司 | Supplementary soleplate traded interim bearing structure who props during system was gone along with sb. to guard him to underground complex |
| CN105064398A (en) * | 2015-08-19 | 2015-11-18 | 中国能源建设集团天津电力建设有限公司 | One-time overall pouring construction method for nuclear powder single-hole GD gallery |
| CN107859061A (en) * | 2017-10-11 | 2018-03-30 | 中国市政工程中南设计研究总院有限公司 | A kind of construction method of box culvert primary concreting |
| CN108914965A (en) * | 2018-08-11 | 2018-11-30 | 中冶重工（唐山）有限公司 | The continuous construction method of aluminum alloy mould plate for pipe gallery |
| CN210946533U (en) * | 2019-06-25 | 2020-07-07 | 中铁八局集团建筑工程有限公司 | A closed channel structure for open cut construction |
| CN212405396U (en) * | 2020-04-26 | 2021-01-26 | 山东省高速路桥养护有限公司 | Adjustable steel template |
| CN111608248A (en) * | 2020-05-20 | 2020-09-01 | 中电建十一局工程有限公司 | Cast-in-situ rainwater cover plate channel construction method |
| CN212866233U (en) * | 2020-06-04 | 2021-04-02 | 广州市公路工程公司 | Recoverable gasbag mould suitable for slot formula ditch |
| CN112127386A (en) * | 2020-09-29 | 2020-12-25 | 长沙开湖设备有限公司 | Underground piping lane construction is with supplementary creeping formwork system |
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Application publication date: 20211019 |