CN112049148A - Construction method of high-fill super-thick weighing concrete retaining wall - Google Patents
Construction method of high-fill super-thick weighing concrete retaining wall Download PDFInfo
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- CN112049148A CN112049148A CN202010876101.0A CN202010876101A CN112049148A CN 112049148 A CN112049148 A CN 112049148A CN 202010876101 A CN202010876101 A CN 202010876101A CN 112049148 A CN112049148 A CN 112049148A
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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
- E02D29/02—Retaining or protecting walls
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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
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
Abstract
A construction method of a high-fill super-thick weighing concrete retaining wall is characterized by comprising the following steps: a. pouring a cushion layer, b, positioning and paying off, c, manufacturing a template, d, installing the template, and e, pouring concrete. The construction method of the high-fill ultra-thick weighing concrete retaining wall has the advantages of simple retaining wall arrangement structure, convenience in construction, capability of avoiding the problem of concrete cracks caused by mass concrete construction, improvement of engineering construction quality, great reduction of construction cost, reduction of unsafe factors in the construction process and guarantee of safety of operators.
Description
Technical Field
The invention relates to a construction method of a concrete retaining wall, in particular to a construction method of a high-fill super-thick weighing concrete retaining wall.
Background
The construction method is characterized in that a large number of hilly areas are available in China, a large number of hilly excavation and gully backfilling are common during municipal road construction, the height of partial backfilling reaches 15 meters, a constant-weight concrete retaining wall is adopted for the road side of a high-fill area, the height of the retaining wall is more than 10 meters, the thickness of the retaining wall is 2-5 meters, construction is difficult, and quality problems such as mold expansion, water seepage, cracks and the like frequently occur in the construction process.
Therefore, the construction method of the prior art using the constant weight concrete retaining wall at the side of the road in the high fill area has various inconveniences and problems.
Disclosure of Invention
The invention aims to provide a safe and reliable construction method of a high-fill super-thick weighing concrete retaining wall.
In order to achieve the purpose, the technical solution of the invention is as follows:
a construction method of a high-fill super-thick weighing concrete retaining wall is characterized by comprising the following steps:
a. pouring cushion layer
Pouring a concrete cushion according to the requirements of design drawings; the widths of two sides of the concrete cushion layer exceed the bottom of the concrete retaining wall respectively, a reinforcing steel bar is embedded at a position 1m away from two sides of the retaining wall respectively when the cushion layer is poured, a half of the length of the reinforcing steel bar is extended into the concrete, and a half of the length of the reinforcing steel bar is exposed;
b. positioning pay-off
According to the requirements of design drawings, paying out a concrete retaining wall side line on the cushion layer;
c. template fabrication
Dividing the concrete retaining wall into construction sections according to the requirement of the concrete retaining wall section diagram per 1m of vertical height, separately constructing two heights of the variable cross section of the retaining wall, and manufacturing a retaining wall side template by using the template according to the height of the divided vertical sections being 1 m;
d. formwork installation
After the concrete cushion is finally set, the manufactured side template is fixed at the position of the side line of the retaining wall for fixing, and the method comprises the following steps:
(1) the side template adopts battens as vertical backs, double steel pipes as transverse backs, the distance between the first reinforcing steel pipe and the bottom is 200mm, and the distance between the second reinforcing steel pipe and the first steel pipe is 500 mm;
(2) the template and the steel bars embedded at the inner side are connected by adopting two opposite-pulling screw rods, the two opposite-pulling rods are respectively welded with the embedded steel bars, the welding adopts double-sided welding, and the height of a welding seam is 6 mm;
(3) screwing the nut, and correcting the flatness and the angle of the template to ensure that the template is installed according with the requirements of a design drawing;
e. pouring of concrete
When concrete is poured, the vibrating rod is required to be inserted quickly and pulled slowly, and the vibrating rod is prevented from touching the opposite-pulling screw rod as much as possible.
The construction method of the high-fill super-thick counterweight concrete retaining wall can be further realized by adopting the following technical measures.
In the method, the thickness of the concrete cushion layer is more than or equal to 200 mm.
The method, wherein the width of each side of the concrete pad exceeds the bottom of the concrete retaining wall by 100 mm.
In the method, the length of the steel bar is more than or equal to 400mm, and the diameter is 25 mm.
In the method, the diameter of the counter-pulling screw is more than or equal to 14 mm.
After the technical scheme is adopted, the construction method of the high-fill super-thick weighing concrete retaining wall has the following advantages:
1. the retaining wall has simple structure and convenient construction;
2. the problem of concrete cracks caused by mass concrete construction is avoided, and the engineering construction quality is improved;
3. greatly reduces the construction cost, reduces unsafe factors in the construction process and ensures the safety of operating personnel.
Drawings
FIG. 1 is a schematic cross-sectional view of a concrete retaining wall of the present invention;
fig. 2 is a schematic view illustrating a configuration of a counterweight type concrete retaining wall formwork according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The invention relates to a high-fill super-thick weighing concrete retaining wall construction process flow which comprises the following steps: pouring a cushion layer, positioning and paying off, manufacturing a template, installing the template and pouring concrete.
The invention relates to a construction method of a high-fill super-thick weighing concrete retaining wall, which comprises the following steps:
1. pouring cushion layer
According to the requirements of design drawings, pouring the concrete cushion layer 1 with the thickness not less than 200. Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a constant-weight concrete retaining wall according to an embodiment of the present invention. As shown in the figure, the width of two sides of the concrete cushion layer respectively exceeds the bottom of the concrete retaining wall by 100mm, and reinforcing steel bars with the length of 400mm of ¢ 25 are embedded in the positions 1m away from two sides of the retaining wall respectively during pouring of the cushion layer, penetrate into the concrete by 200mm and are exposed by 200 mm.
2. Positioning pay-off
And (4) releasing the concrete retaining wall side line on the cushion layer according to the requirements of the design drawing.
3. Template fabrication
Dividing the concrete retaining wall into construction sections according to the requirement of the concrete retaining wall section diagram per 1m of vertical height, constructing the retaining wall at the positions of variable cross-section heights h1 and h2 in a separated mode, and manufacturing a retaining wall side formwork according to the divided vertical section heights 1m by using the formwork.
4. Formwork installation
Fig. 2 is a schematic view illustrating a configuration of a counterweight type concrete retaining wall formwork according to an embodiment of the present invention. After the concrete cushion is finally set, fixing the manufactured side template at the position of the side line of the retaining wall, wherein the fixing requirements are as follows:
(1) the side mold adopts battens as vertical backs, the double steel pipes 2 as transverse backs, the distance between the first reinforcing steel pipe and the bottom is 200mm, the distance between the second reinforcing steel pipe and the first steel pipe is 500mm, and the height of the free end of the template is 300mm;
(2) the template and the embedded steel bar with the diameter of 25mm on the inner side are connected through the opposite-pulling screw rods 5 with the diameter of 14mm, the two opposite-pulling rods are respectively in welded connection with the embedded steel bar 6, double-face welding is adopted, the height of a welding seam is 6mm, and the welding length is not less than 150 mm.
(3) And screwing the screw cap 3, and correcting the flatness and the angle of the template to ensure that the template is installed to meet the requirements of a design drawing.
5. Pouring of concrete
When concrete is poured, the vibrating rod is required to be inserted quickly and pulled slowly, the vibrating rod is prevented from touching the opposite-pulling screw rod as much as possible, and damage to pulling points caused by people is reduced.
The method for constructing the high-fill super-thick weighing concrete retaining wall has the advantages of simple and convenient process, strong practicability and wide application, and is suitable for the installation of gravity type concrete retaining wall templates and concrete construction of roads and municipal works.
The construction method of the high-fill ultra-thick weighing concrete retaining wall is applied to the township infrastructure construction project engineering of chestnut county in Pingxi province, is convenient to construct, is safe and reliable, and obtains better economic benefit.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (5)
1. A construction method of a high-fill super-thick weighing concrete retaining wall is characterized by comprising the following steps:
a. pouring cushion layer
Pouring a concrete cushion according to the requirements of design drawings; the widths of two sides of the concrete cushion layer exceed the bottom of the concrete retaining wall respectively, a reinforcing steel bar is embedded at a position 1m away from two sides of the retaining wall respectively when the cushion layer is poured, a half of the length of the reinforcing steel bar is extended into the concrete, and a half of the length of the reinforcing steel bar is exposed;
b. positioning pay-off
According to the requirements of design drawings, paying out a concrete retaining wall side line on the cushion layer;
c. template fabrication
Dividing the concrete retaining wall into construction sections according to the requirement of the concrete retaining wall section diagram per 1m of vertical height, separately constructing two heights of the variable cross section of the retaining wall, and manufacturing a retaining wall side template by using the template according to the height of the divided vertical sections being 1 m;
d. formwork installation
After the concrete cushion is finally set, the manufactured side template is fixed at the position of the side line of the retaining wall for fixing, and the method comprises the following steps:
(1) the side template adopts battens as vertical backs, double steel pipes as transverse backs, the distance between the first reinforcing steel pipe and the bottom is 200mm, and the distance between the second reinforcing steel pipe and the first steel pipe is 500 mm;
(2) the template and the steel bars embedded at the inner side are connected by adopting two opposite-pulling screw rods, the two opposite-pulling rods are respectively welded with the embedded steel bars, the welding adopts double-sided welding, and the height of a welding seam is 6 mm;
(3) screwing the nut, and correcting the flatness and the angle of the template to ensure that the template is installed according with the requirements of a design drawing;
e. pouring of concrete
When concrete is poured, the vibrating rod is required to be inserted quickly and pulled slowly, and the vibrating rod is prevented from touching the opposite-pulling screw rod as much as possible.
2. The method of claim 1 wherein the concrete pad is no less than 200mm thick.
3. The method of claim 1 wherein the width of each side of the concrete pad exceeds the bottom of the concrete wall by 100 mm.
4. The method of claim 1, wherein the length of the steel bar is greater than or equal to 400mm and the diameter is 25 mm.
5. The method of claim 1 wherein the diameter of said counter-pulling screw is 14mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010876101.0A CN112049148A (en) | 2020-08-27 | 2020-08-27 | Construction method of high-fill super-thick weighing concrete retaining wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010876101.0A CN112049148A (en) | 2020-08-27 | 2020-08-27 | Construction method of high-fill super-thick weighing concrete retaining wall |
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| CN112049148A true CN112049148A (en) | 2020-12-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232676A (en) * | 2021-12-31 | 2022-03-25 | 福建磊鑫(集团)有限公司 | Method for synchronously and quickly constructing balance weight type retaining wall structure and grouted stone slab |
| CN114657940A (en) * | 2022-05-07 | 2022-06-24 | 四川路航建设工程有限责任公司 | Formwork system and construction method of plywood formwork cast-in-situ gravity type dike retaining wall concrete |
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| CN109736346A (en) * | 2018-12-13 | 2019-05-10 | 中交一公局桥隧工程有限公司 | Steel anchor tube reinforces weathered rock formation reinforcement balance weight retaining wall structure and construction method |
| CN111119232A (en) * | 2020-01-23 | 2020-05-08 | 贵州星隆迪岩土工程有限公司 | Improved pile-support two-layer retaining wall structure and construction method |
| CN210482363U (en) * | 2019-05-28 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Add muscle weighing type retaining wall |
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2020
- 2020-08-27 CN CN202010876101.0A patent/CN112049148A/en active Pending
Patent Citations (4)
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| CN205475313U (en) * | 2016-01-07 | 2016-08-17 | 中交第二航务工程勘察设计院有限公司 | Add muscle balance weight formula retaining wall structure |
| CN109736346A (en) * | 2018-12-13 | 2019-05-10 | 中交一公局桥隧工程有限公司 | Steel anchor tube reinforces weathered rock formation reinforcement balance weight retaining wall structure and construction method |
| CN210482363U (en) * | 2019-05-28 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Add muscle weighing type retaining wall |
| CN111119232A (en) * | 2020-01-23 | 2020-05-08 | 贵州星隆迪岩土工程有限公司 | Improved pile-support two-layer retaining wall structure and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232676A (en) * | 2021-12-31 | 2022-03-25 | 福建磊鑫(集团)有限公司 | Method for synchronously and quickly constructing balance weight type retaining wall structure and grouted stone slab |
| CN114657940A (en) * | 2022-05-07 | 2022-06-24 | 四川路航建设工程有限责任公司 | Formwork system and construction method of plywood formwork cast-in-situ gravity type dike retaining wall concrete |
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