CN113445511A - Deep foundation pit assembled type safety channel reinforcing method and construction steps - Google Patents
Deep foundation pit assembled type safety channel reinforcing method and construction steps Download PDFInfo
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- CN113445511A CN113445511A CN202110322435.8A CN202110322435A CN113445511A CN 113445511 A CN113445511 A CN 113445511A CN 202110322435 A CN202110322435 A CN 202110322435A CN 113445511 A CN113445511 A CN 113445511A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
Abstract
The invention discloses a deep foundation pit assembled type safety channel reinforcing method and construction steps, and particularly relates to the field of building construction, wherein the method comprises the following steps: s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water; s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction; s3, building a unit bracket: and erecting a first section of support above the bottom plate of the first section to serve as a foundation for the pressure casting working platform and the later unit template support. According to the invention, through the assembly of the unit templates, the bottom and the side walls of the safety channel can be poured, and the concrete reinforcing layers can be formed on the side walls and the bottom of the safety channel, so that the safety channel is reinforced, the construction is simple, and the period is short.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for reinforcing a deep foundation pit assembled type safety channel and a construction step.
Background
The building construction refers to production activities in the engineering construction implementation stage, is the construction process of various buildings, and also can be a process of changing various lines on a design drawing into a real object at a specified place. The method comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like.
In recent years, with the rapid development of the building industry, the number of deep foundation pits is more and more, a safety channel is dug in the deep foundation pit, a steel pipe scaffold is mostly adopted for temporarily setting up the vertical safety channel of the deep foundation pit for supporting, meanwhile, the foundation pit is always in a digging state, the rigidity of the temporary channel set up by the steel pipe scaffold is small, the deformation is large, the potential safety hazard is great, a large amount of labor and materials are consumed, and the economic benefit is poor; or after the foundation pit is constructed to the bottom of the pit, the foundation of the vertical safety channel is designed and manufactured, and then the foundation is installed from bottom to top for supporting, so that potential safety hazards exist during use, and therefore the deep foundation pit assembly type safety channel reinforcing method and the construction steps are provided.
Disclosure of Invention
In order to overcome the above-mentioned defects in the prior art, embodiments of the present invention provide a method and a construction step for reinforcing an assembled security tunnel of a deep foundation pit, so as to solve the above-mentioned problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a deep foundation pit fabricated safety channel reinforcing method and construction steps comprise the following steps:
s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water;
s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction;
s3, building a unit bracket: erecting a first section of support above the bottom plate of the first section to serve as a foundation for a pressure casting working platform and a later unit template support;
s4, unit template installation: the safety channel comprises two side walls and a bottom plate, wherein the closed templates are erected on the two side walls and the bottom plate, the closed templates comprise side wall templates and bottom plate templates, lateral pouring openings are reserved at the upper parts of the two side wall templates respectively, a plurality of pouring openings and grout outlets close to the bottom plate are reserved at the lateral sides of the bottom plate templates, and grouting pipes which vertically penetrate through the bottom plate templates and extend to the bottom plate are reserved in the middle of the bottom plate templates;
s5, preparing concrete: mixing and stirring concrete raw materials uniformly by a stirrer, wherein the concrete raw materials comprise, by weight, 20-60 parts of fine sand, 5-10 parts of broken stone, 35-65 parts of cement, 1-3 parts of a water reducing agent, 4-7 parts of gypsum powder, 1-2 parts of an early strength agent, 3-6 parts of a slow release agent, 3-5 parts of a defoaming agent, 3-5 parts of composite fibers and 35-55 parts of water;
s6, pouring concrete: respectively pouring the side walls and the bottom plate;
s7, grouting: performing pressure grouting from an opening at the lower end of the grouting pipe; the grouting material is cement slurry, and the cement slurry comprises, by weight, 40-80 parts of cement, 150-250 parts of fly ash, 30-90 parts of bentonite, 700-1000 parts of fine sand, 200-300 parts of water and 0-40 parts of an additive; the grouting pressure is 0.25-0.55 Mpa, and the pressurizing time is 10-12 seconds;
s8, repeating the construction process of the side wall in the steps S2 to S7, and constructing the rest sections of the side wall in sequence until the pouring of the whole safe channel is completed;
s9, concrete curing: and after the whole safe channel is poured for 12 hours, spraying and maintaining the poured surface for 3-5 days.
Further, the side wall pouring is to symmetrically pour two side walls from the lateral pouring openings at the same time respectively, the lateral pouring openings are plugged after concrete is poured to the lateral pouring openings, then the side walls are symmetrically poured from the bottom plate pouring openings at the two ends of the bottom plate template at the same time until the concrete flows out of the grout outlet openings at the two ends of the bottom plate template, and the pouring of the two side walls is completed.
Further, the bottom plate pouring is that the bottom plates are poured from the bottom plate pouring openings in the middle of the bottom plate formwork to the two sides respectively until the concrete flows out of the corresponding grout outlet, and finally, the bottom plate pouring openings on the two sides of the bottom plate formwork are poured symmetrically at the same time until the concrete flows out of the corresponding grout outlet, so that the bottom plate pouring is completed.
Further, the concrete material in the step S5 comprises the following raw materials, by weight, 40 parts of fine sand, 8 parts of gravel, 50 parts of cement, 2 parts of a water reducing agent, 5 parts of gypsum powder, 1.5 parts of an early strength agent, 4 parts of a slow release agent, 4 parts of a defoaming agent, 4 parts of composite fiber and 45 parts of water.
Further, the cement slurry in the step S7 includes, by weight, 60 parts of cement, 200 parts of fly ash, 60 parts of bentonite, 900 parts of fine sand, 250 parts of water, and 10 parts of an additive.
Further, in step S4, the joints are bonded by using a sponge tape when the unit templates are mounted, and the joints are flat.
Furthermore, the granularity of the fine sand is 120-180 meshes, and the particle size of the broken stone is smaller than 8 mm.
Further, in step S6, the pouring pipe is inserted from the bottom plate pouring opening during the bottom plate pouring, the pouring condition is observed from the adjacent bottom plate pouring opening, and the pouring pipe is slowly pulled out to the bottom plate pouring opening while pouring.
The invention has the technical effects and advantages that:
according to the invention, through the assembly of the unit templates, the bottom and the side walls of the safety channel can be poured, and the concrete reinforcing layers can be formed on the side walls and the bottom of the safety channel, so that the safety channel is reinforced, the construction is simple, and the period is short.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
The invention provides a deep foundation pit assembled type safe channel reinforcing method and a construction step, wherein the method comprises the following steps:
s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water;
s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction;
s3, building a unit bracket: erecting a first section of support above the bottom plate of the first section to serve as a foundation for a pressure casting working platform and a later unit template support;
s4, unit template installation: the safety channel comprises two side walls and a bottom plate, wherein the closed templates are erected on the two side walls and the bottom plate, the closed templates comprise side wall templates and bottom plate templates, lateral pouring openings are reserved at the upper parts of the two side wall templates respectively, a plurality of pouring openings and grout outlets close to the bottom plate are reserved laterally in the bottom plate templates, grouting pipes which vertically penetrate through the bottom plate templates and extend to the bottom plate are reserved in the middle of the bottom plate templates, and joints are bonded by sponge adhesive tapes when the unit templates are installed and are smooth;
s5, preparing concrete: mixing and stirring concrete raw materials uniformly by a stirrer, wherein the concrete raw materials comprise, by weight, 20-60 parts of fine sand, 5-10 parts of broken stone, 35-65 parts of cement, 1-3 parts of a water reducing agent, 4-7 parts of gypsum powder, 1-2 parts of an early strength agent, 3-6 parts of a slow release agent, 3-5 parts of a defoaming agent, 3-5 parts of composite fibers and 35-55 parts of water;
s6, pouring concrete: respectively pouring the side walls and the bottom plate;
s7, grouting: performing pressure grouting from an opening at the lower end of the grouting pipe; the grouting material is cement slurry, and the cement slurry comprises, by weight, 40-80 parts of cement, 150-250 parts of fly ash, 30-90 parts of bentonite, 700-1000 parts of fine sand, 200-300 parts of water and 0-40 parts of an additive; the grouting pressure is 0.25-0.55 Mpa, and the pressurizing time is 10-12 seconds;
s8, repeating the construction process of the side wall in the steps S2 to S7, and constructing the rest sections of the side wall in sequence until the pouring of the whole safe channel is completed;
s9, concrete curing: and after the whole safe channel is poured for 12 hours, spraying and maintaining the poured surface for 3-5 days.
The side wall pouring is characterized in that two side walls are symmetrically poured from the side pouring openings at the same time respectively, the side pouring openings are plugged after concrete is poured to the side pouring openings, then bottom plate pouring is symmetrically poured from the bottom plate pouring openings at two ends of the bottom plate template at the same time until the concrete flows out of the grout outlet at two ends of the bottom plate template, pouring of the two side walls is completed, the bottom plate pouring is that bottom plates are poured from the bottom plate pouring openings at the middle part of the bottom plate template to two sides respectively until the concrete flows out of the corresponding grout outlet, finally, the bottom plate pouring is simultaneously and symmetrically poured from the bottom plate pouring openings at two sides of the bottom plate template until the concrete flows out of the corresponding grout outlet, pouring of the bottom plate is completed, pouring pipes are inserted from the bottom plate pouring openings when the bottom plate is poured, pouring conditions are observed from the adjacent bottom plate pouring openings, and the pouring pipes are slowly pulled out to the bottom plate pouring openings while pouring.
Wherein the particle size of the fine sand is 120-180 meshes, and the particle size of the broken stone is less than 8 mm.
Example 1
The invention provides a deep foundation pit assembled type safe channel reinforcing method and a construction step, wherein the method comprises the following steps:
s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water;
s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction;
s3, building a unit bracket: erecting a first section of support above the bottom plate of the first section to serve as a foundation for a pressure casting working platform and a later unit template support;
s4, unit template installation: the safety channel comprises two side walls and a bottom plate, wherein the closed templates are erected on the two side walls and the bottom plate, the closed templates comprise side wall templates and bottom plate templates, lateral pouring openings are reserved at the upper parts of the two side wall templates respectively, a plurality of pouring openings and grout outlets close to the bottom plate are reserved laterally in the bottom plate templates, grouting pipes which vertically penetrate through the bottom plate templates and extend to the bottom plate are reserved in the middle of the bottom plate templates, and joints are bonded by sponge adhesive tapes when the unit templates are installed and are smooth;
s5, preparing concrete: mixing and stirring concrete raw materials uniformly by a stirrer, wherein the concrete raw materials comprise, by weight, 60 parts of fine sand, 10 parts of broken stone, 65 parts of cement, 3 parts of a water reducing agent, 7 parts of gypsum powder, 2 parts of an early strength agent, 6 parts of a slow release agent, 5 parts of a defoaming agent, 5 parts of composite fiber and 55 parts of water;
s6, pouring concrete: respectively pouring the side walls and the bottom plate;
s7, grouting: performing pressure grouting from an opening at the lower end of the grouting pipe; the grouting adopts cement slurry, and the cement slurry comprises 80 parts of cement, 250 parts of fly ash, 90 parts of bentonite, 1000 parts of fine sand, 300 parts of water and 40 parts of additive in parts by weight; the grouting pressure is 0.25-0.55 Mpa, and the pressurizing time is 10-12 seconds;
s8, repeating the construction process of the side wall in the steps S2 to S7, and constructing the rest sections of the side wall in sequence until the pouring of the whole safe channel is completed;
s9, concrete curing: and after the whole safe channel is poured for 12 hours, spraying and maintaining the poured surface for 3-5 days.
The side wall pouring is characterized in that two side walls are symmetrically poured from the side pouring openings at the same time respectively, the side pouring openings are plugged after concrete is poured to the side pouring openings, then bottom plate pouring is symmetrically poured from the bottom plate pouring openings at two ends of the bottom plate template at the same time until the concrete flows out of the grout outlet at two ends of the bottom plate template, pouring of the two side walls is completed, the bottom plate pouring is that bottom plates are poured from the bottom plate pouring openings at the middle part of the bottom plate template to two sides respectively until the concrete flows out of the corresponding grout outlet, finally, the bottom plate pouring is simultaneously and symmetrically poured from the bottom plate pouring openings at two sides of the bottom plate template until the concrete flows out of the corresponding grout outlet, pouring of the bottom plate is completed, pouring pipes are inserted from the bottom plate pouring openings when the bottom plate is poured, pouring conditions are observed from the adjacent bottom plate pouring openings, and the pouring pipes are slowly pulled out to the bottom plate pouring openings while pouring.
Wherein the particle size of the fine sand is 120-180 meshes, and the particle size of the broken stone is less than 8 mm.
Example 2
The invention provides a deep foundation pit assembled type safe channel reinforcing method and a construction step, wherein the method comprises the following steps:
s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water;
s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction;
s3, building a unit bracket: erecting a first section of support above the bottom plate of the first section to serve as a foundation for a pressure casting working platform and a later unit template support;
s4, unit template installation: the safety channel comprises two side walls and a bottom plate, wherein the closed templates are erected on the two side walls and the bottom plate, the closed templates comprise side wall templates and bottom plate templates, lateral pouring openings are reserved at the upper parts of the two side wall templates respectively, a plurality of pouring openings and grout outlets close to the bottom plate are reserved laterally in the bottom plate templates, grouting pipes which vertically penetrate through the bottom plate templates and extend to the bottom plate are reserved in the middle of the bottom plate templates, and joints are bonded by sponge adhesive tapes when the unit templates are installed and are smooth;
s5, preparing concrete: mixing and stirring concrete raw materials uniformly by a stirrer, wherein the concrete raw materials comprise, by weight, 20 parts of fine sand, 5 parts of gravel, 35 parts of cement, 1 part of a water reducing agent, 4 parts of gypsum powder, 1 part of an early strength agent, 3 parts of a slow release agent, 3 parts of a defoaming agent, 3 parts of composite fibers and 35 parts of water;
s6, pouring concrete: respectively pouring the side walls and the bottom plate;
s7, grouting: performing pressure grouting from an opening at the lower end of the grouting pipe; the grouting adopts cement slurry, and the cement slurry comprises, by weight, 40 parts of cement, 150 parts of fly ash, 30 parts of bentonite, 700 parts of fine sand, 200 parts of water and 5 parts of an additive; the grouting pressure is 0.25-0.55 Mpa, and the pressurizing time is 10-12 seconds;
s8, repeating the construction process of the side wall in the steps S2 to S7, and constructing the rest sections of the side wall in sequence until the pouring of the whole safe channel is completed;
s9, concrete curing: and after the whole safe channel is poured for 12 hours, spraying and maintaining the poured surface for 3-5 days.
The side wall pouring is characterized in that two side walls are symmetrically poured from the side pouring openings at the same time respectively, the side pouring openings are plugged after concrete is poured to the side pouring openings, then bottom plate pouring is symmetrically poured from the bottom plate pouring openings at two ends of the bottom plate template at the same time until the concrete flows out of the grout outlet at two ends of the bottom plate template, pouring of the two side walls is completed, the bottom plate pouring is that bottom plates are poured from the bottom plate pouring openings at the middle part of the bottom plate template to two sides respectively until the concrete flows out of the corresponding grout outlet, finally, the bottom plate pouring is simultaneously and symmetrically poured from the bottom plate pouring openings at two sides of the bottom plate template until the concrete flows out of the corresponding grout outlet, pouring of the bottom plate is completed, pouring pipes are inserted from the bottom plate pouring openings when the bottom plate is poured, pouring conditions are observed from the adjacent bottom plate pouring openings, and the pouring pipes are slowly pulled out to the bottom plate pouring openings while pouring.
Wherein the particle size of the fine sand is 120-180 meshes, and the particle size of the broken stone is less than 8 mm.
Example 3
A deep foundation pit fabricated safety channel reinforcing method and construction steps comprise the following steps:
s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water;
s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction;
s3, building a unit bracket: erecting a first section of support above the bottom plate of the first section to serve as a foundation for a pressure casting working platform and a later unit template support;
s4, unit template installation: the safety channel comprises two side walls and a bottom plate, wherein the closed templates are erected on the two side walls and the bottom plate, the closed templates comprise side wall templates and bottom plate templates, lateral pouring openings are reserved at the upper parts of the two side wall templates respectively, a plurality of pouring openings and grout outlets close to the bottom plate are reserved laterally in the bottom plate templates, grouting pipes which vertically penetrate through the bottom plate templates and extend to the bottom plate are reserved in the middle of the bottom plate templates, and joints are bonded by sponge adhesive tapes when the unit templates are installed and are smooth;
s5, preparing concrete: mixing and stirring concrete raw materials uniformly by a stirrer, wherein the concrete raw materials comprise, by weight, 40 parts of fine sand, 8 parts of broken stone, 50 parts of cement, 2 parts of a water reducing agent, 5 parts of gypsum powder, 1.5 parts of an early strength agent, 4 parts of a slow release agent, 4 parts of a defoaming agent, 4 parts of composite fiber and 45 parts of water;
s6, pouring concrete: respectively pouring the side walls and the bottom plate;
s7, grouting: performing pressure grouting from an opening at the lower end of the grouting pipe; the grouting adopts cement slurry, and the cement slurry comprises, by weight, 60 parts of cement, 200 parts of fly ash, 60 parts of bentonite, 900 parts of fine sand, 250 parts of water and 10 parts of an additive;
s8, repeating the construction process of the side wall in the steps S2 to S7, and constructing the rest sections of the side wall in sequence until the pouring of the whole safe channel is completed;
s9, concrete curing: and after the whole safe channel is poured for 12 hours, spraying and maintaining the poured surface for 3-5 days.
The side wall pouring is characterized in that two side walls are symmetrically poured from the side pouring openings at the same time respectively, the side pouring openings are plugged after concrete is poured to the side pouring openings, then bottom plate pouring is symmetrically poured from the bottom plate pouring openings at two ends of the bottom plate template at the same time until the concrete flows out of the grout outlet at two ends of the bottom plate template, pouring of the two side walls is completed, the bottom plate pouring is that bottom plates are poured from the bottom plate pouring openings at the middle part of the bottom plate template to two sides respectively until the concrete flows out of the corresponding grout outlet, finally, the bottom plate pouring is simultaneously and symmetrically poured from the bottom plate pouring openings at two sides of the bottom plate template until the concrete flows out of the corresponding grout outlet, pouring of the bottom plate is completed, pouring pipes are inserted from the bottom plate pouring openings when the bottom plate is poured, pouring conditions are observed from the adjacent bottom plate pouring openings, and the pouring pipes are slowly pulled out to the bottom plate pouring openings while pouring.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A deep foundation pit fabricated safety channel reinforcing method and construction steps are characterized by comprising the following steps:
s1, job face processing: roughening the bottom plate and the side wall of the safety channel, and cleaning by adopting high-pressure water;
s2, unit steel bar binding: dividing the length of the safety channel into N sections, and binding a side wall and a bottom plate steel bar of a first section along one side of the safety channel in the length direction;
s3, building a unit bracket: erecting a first section of support above the bottom plate of the first section to serve as a foundation for a pressure casting working platform and a later unit template support;
s4, unit template installation: the safety channel comprises two side walls and a bottom plate, wherein the closed templates are erected on the two side walls and the bottom plate, the closed templates comprise side wall templates and bottom plate templates, lateral pouring openings are reserved at the upper parts of the two side wall templates respectively, a plurality of pouring openings and grout outlets close to the bottom plate are reserved at the lateral sides of the bottom plate templates, and grouting pipes which vertically penetrate through the bottom plate templates and extend to the bottom plate are reserved in the middle of the bottom plate templates;
s5, preparing concrete: mixing and stirring concrete raw materials uniformly by a stirrer, wherein the concrete raw materials comprise, by weight, 20-60 parts of fine sand, 5-10 parts of broken stone, 35-65 parts of cement, 1-3 parts of a water reducing agent, 4-7 parts of gypsum powder, 1-2 parts of an early strength agent, 3-6 parts of a slow release agent, 3-5 parts of a defoaming agent, 3-5 parts of composite fibers and 35-55 parts of water;
s6, pouring concrete: respectively pouring the side walls and the bottom plate;
s7, grouting: performing pressure grouting from an opening at the lower end of the grouting pipe; the grouting material is cement slurry, and the cement slurry comprises, by weight, 40-80 parts of cement, 150-250 parts of fly ash, 30-90 parts of bentonite, 700-1000 parts of fine sand, 200-300 parts of water and 0-40 parts of an additive; the grouting pressure is 0.25-0.55 Mpa, and the pressurizing time is 10-12 seconds;
s8, repeating the construction process of the side wall in the steps S2 to S7, and constructing the rest sections of the side wall in sequence until the pouring of the whole safe channel is completed;
s9, concrete curing: and after the whole safe channel is poured for 12 hours, spraying and maintaining the poured surface for 3-5 days.
2. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 1 are characterized in that: the side wall pouring is to symmetrically pour two side walls from the side pouring openings at the same time respectively, the side pouring openings are plugged after concrete is poured to the side pouring openings, then the side pouring openings at two ends of the bottom plate template are symmetrically poured at the same time until the concrete flows out of the grout outlet at two ends of the bottom plate template, and the pouring of the two side walls is completed.
3. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 2 are characterized in that: and the bottom plate pouring is that the bottom plates are poured from the bottom plate pouring openings in the middle of the bottom plate template to two sides respectively until the concrete flows out of the corresponding grout outlet, and finally, the bottom plate pouring openings on the two sides of the bottom plate template are symmetrically poured simultaneously until the concrete flows out of the corresponding grout outlet, so that the pouring of the bottom plates is completed.
4. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 3 are characterized in that: the concrete material in the step S5 comprises the following raw materials, by weight, 40 parts of fine sand, 8 parts of broken stone, 50 parts of cement, 2 parts of a water reducing agent, 5 parts of gypsum powder, 1.5 parts of an early strength agent, 4 parts of a slow release agent, 4 parts of a defoaming agent, 4 parts of composite fiber and 45 parts of water.
5. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 4 are characterized in that: the cement slurry in the step S7 comprises, by weight, 60 parts of cement, 200 parts of fly ash, 60 parts of bentonite, 900 parts of fine sand, 250 parts of water and 10 parts of an additive.
6. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 5 are characterized in that: in step S4, the joints are bonded by sponge tapes when the unit templates are installed, and the joints are flat.
7. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 6 are characterized in that: the particle size of the fine sand is 120-180 meshes, and the particle size of the broken stone is smaller than 8 mm.
8. The deep foundation pit assembled type safe channel reinforcing method and construction steps according to claim 7 are characterized in that: in step S6, the pouring pipe is inserted from the bottom plate pouring opening during the bottom plate pouring, the pouring condition is observed from the adjacent bottom plate pouring opening, and the pouring pipe is slowly pulled out to the bottom plate pouring opening while pouring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110322435.8A CN113445511A (en) | 2021-03-25 | 2021-03-25 | Deep foundation pit assembled type safety channel reinforcing method and construction steps |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110322435.8A CN113445511A (en) | 2021-03-25 | 2021-03-25 | Deep foundation pit assembled type safety channel reinforcing method and construction steps |
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| CN113445511A true CN113445511A (en) | 2021-09-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2824541A1 (en) * | 1977-06-10 | 1978-12-21 | Jean Marie Gerard Rene Koehl | DEVICE FOR STRENGTHENING THE WALLS OF BUILDING DITCHES, PIPE DITCHES, etc. |
| CN206800484U (en) * | 2017-04-01 | 2017-12-26 | 周兆弟 | Ruggedized construction for underpass |
| CN110468744A (en) * | 2019-08-26 | 2019-11-19 | 北京奥科瑞检测技术开发有限公司 | A kind of channel bridge reinforced construction method |
-
2021
- 2021-03-25 CN CN202110322435.8A patent/CN113445511A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2824541A1 (en) * | 1977-06-10 | 1978-12-21 | Jean Marie Gerard Rene Koehl | DEVICE FOR STRENGTHENING THE WALLS OF BUILDING DITCHES, PIPE DITCHES, etc. |
| CN206800484U (en) * | 2017-04-01 | 2017-12-26 | 周兆弟 | Ruggedized construction for underpass |
| CN110468744A (en) * | 2019-08-26 | 2019-11-19 | 北京奥科瑞检测技术开发有限公司 | A kind of channel bridge reinforced construction method |
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Application publication date: 20210928 |