CN109537626B - Subway station concrete crack control method - Google Patents
Subway station concrete crack control method Download PDFInfo
- Publication number
- CN109537626B CN109537626B CN201811474037.2A CN201811474037A CN109537626B CN 109537626 B CN109537626 B CN 109537626B CN 201811474037 A CN201811474037 A CN 201811474037A CN 109537626 B CN109537626 B CN 109537626B
- Authority
- CN
- China
- Prior art keywords
- water
- group
- side wall
- pipes
- water pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for controlling cracking of concrete in a subway station. Water starts to flow until the concrete completely covers the water pipe; controlling the water flow of the water pipe to be 4-6 m3In the range of/h until the internal temperature of the concrete reaches a maximum value; reduce the water flow of the water pipe to 2-4 m3Continuously introducing water for 12-24 hours within the range of/h; and after the construction is finished, grouting the cooling water pipe by using cement paste or mortar with the strength not lower than that of the concrete. The invention can better utilize the hydration heat generated by newly-poured concrete at the upper part to heat the concrete poured at the lower part, greatly reduces the temperature difference stress between the upper concrete and the lower concrete of the construction joint, and effectively solves the historical problem that a large number of cracks are generated near the construction joint due to the temperature stress of the concrete.
Description
Technical Field
The invention relates to a method for controlling cracking of concrete of a subway station.
Background
With the further development of the economy of China, the wealth of the China is further improved, the urban gathering phenomenon is more and more obvious, and the urban congestion phenomenon is more and more serious. Meanwhile, the domestic urbanization development is further accelerated, and domestic cities are continuously developing towards the urban circle. These all greatly promoted the prosperity of rail transit such as subway, intercity railway, especially subway project. Since the first subway line in Beijing in 1965 in China, the subway has been opened all the time in China, Beijing, Shanghai, Shenzhen, Guangdong, Hubei, Hunan, Jiangsu, Zhejiang, Heilongjiang, Jilin, Liaoning, Henan, Sichuan, Shaanxi, Anhui, Guangxi, Guizhou and other provinces and cities open the subway one after the other, and the composite speed increase of the urban railway mileage reaches up to 23.7% in 2005 to 2015, and is still growing continuously.
Behind the prosperous development of subways, there is an ever-increasing demand for the construction of subway stations. However, in the subway station projects, the problem of cracks generated by concrete pouring cannot be solved well at home, and the performance of concrete is greatly influenced by the generation of the cracks. Especially after the subway is on the road, because the environment to be faced by the subway station is especially special, the subway station can be influenced by various adverse factors such as corrosive media in underground water, stray current caused by a direct current traction train, load effect caused by rock mass and train vibration and the like, and further cracks can be deepened and enlarged, the corrosion of the structure and the reinforcing steel bars of the subway station is accelerated, and serious potential safety hazards are caused. Therefore, the subway station can control the generation of cracks in the concrete pouring process.
Generally, a method for arranging cooling water pipes in newly poured concrete is adopted in China, and the generation of cracks is reduced by means of guiding and dissipating hydration heat. This method is generally applied to mass concrete and is generally implemented by arranging cooling water pipes at equal intervals. Because the concrete of subway station is thinner, the concrete that uses is not bulky concrete, can produce a large amount of cracks because of temperature stress near the construction joint, so this kind of conventional condenser tube arrangement mode is not special ideal to the accuse of subway station splitting effect, and condenser tube arranges loaded down with trivial details.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for controlling the cracking of the subway station concrete, which can effectively control the cracking problem of the subway tunnel concrete, thereby improving the performance of the subway tunnel concrete, reducing the potential danger of the subway tunnel concrete and having obvious effect.
The purpose of the invention is realized as follows: a method for controlling the crack of the concrete of a subway station is carried out after the binding of structural steel bars is finished and comprises the following steps:
step one, symmetrically arranging a water pipe at a position 125-150 mm away from the upper part and the lower part of a lower construction joint generated by a bottom plate and a side wall to form a first group of water pipes at the bottom; symmetrically arranging a water pipe at a position 125-150 mm away from the upper and lower parts of an upper construction joint generated by the top plate and the side wall to form a first group of water pipes at the top; symmetrically arranging a water pipe at a position 250-300 mm away from the upper part and the lower part of the first group of water pipes at the bottom to form a second group of water pipes at the bottom; symmetrically arranging a water pipe at a position 250-300 mm away from the upper part and the lower part of the first group of water pipes at the top to form a second group of water pipes at the top;
taking the sewer pipes of the second group of water pipes at the bottom as initial positions, and distributing a plurality of water pipes in a chamfer area of the bottom plate in a mode of gradually increasing the interval distance of 450mm to 550mm and in a rectangular array mode to form water pipes in the chamfer area of the bottom plate;
connecting water pipes in a base plate chamfering area, a sewer pipe of a second group of water pipes at the bottom and a sewer pipe of a first group of water pipes at the bottom in sequence in a snake-shaped wiring mode to form a base plate cooling water pipeline with an inlet and an outlet;
taking the water feeding pipe of the second group of water pipes at the top as an initial position, and distributing the plurality of water pipes in the chamfer area of the top plate in a mode of gradually increasing the interval distance from 450mm to 550mm in a rectangular array mode to form water pipes in the chamfer area of the top plate;
connecting water pipes in a top plate chamfering area, a second group of water pipes on the top and a first group of water pipes on the top in a snake-shaped wiring manner to form a top plate cooling water pipeline with an inlet and an outlet;
arranging water pipes at intervals of 250-300 mm on the side wall between an upper water pipe of a second group of water pipes at the bottom and a first height above a lower construction joint to form a side wall lower water pipe group, wherein the first height is one fourth of the height of the lower construction joint to the upper construction joint;
arranging water pipes at intervals of 250-300 mm on the side wall between the sewer pipe of the second group of water pipes at the top and the second height below the upper construction joint to form a water pipe group on the upper part of the side wall, wherein the second height is one fourth of the height of the upper construction joint from the lower construction joint;
arranging water pipes every 450-550 mm on the side wall between the uppermost water pipe of the lower water pipe group of the side wall and the lowermost water pipe of the upper water pipe group of the side wall to form a middle water pipe group of the side wall;
connecting the lower water pipes of the first group of water pipes at the top, the lower water pipes of the second group of water pipes at the top, the upper water pipe group of the side wall, the middle water pipe group of the side wall, the lower water pipe group of the side wall, the upper water pipes of the second group of water pipes at the bottom and the lower water pipes of the first group of water pipes at the bottom in a snake-shaped wiring manner in sequence to form a side wall cooling water pipeline with an inlet and an outlet;
step eight, respectively carrying out water pressing tests on the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline to ensure that all the pipelines are watertight;
step nine, when the side wall concrete is poured, communicating an inlet of the bottom plate cooling water pipeline with an outlet of the side wall cooling water pipeline; when the concrete completely covers the side wall cooling water pipeline, water is introduced to the inlet of the side wall cooling water pipeline, the water flow is controlled to be 4-6 m3/h at first until the internal temperature of the concrete reaches the maximum value, then the water flow is reduced to 2-4 m3/h, and water is introduced continuously for 12-24 hours; when the top plate concrete is poured, communicating an inlet of the side wall cooling water pipeline with an outlet of the top plate cooling water pipeline; when the concrete completely covers the top plate cooling water pipeline, water is introduced to the inlet of the top plate cooling water pipeline; firstly, controlling the water flow to be 4-6 m3/h until the internal temperature of the concrete reaches the maximum value, then reducing the water flow to be 2-4 m3/h, and continuously introducing water for 12-24 hours;
step ten, after the construction is finished, grouting the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline by using cement paste or mortar with the strength not lower than that of concrete.
According to the method for controlling the crack of the subway station concrete, the lengths of the first top group of water pipes, the second top group of water pipes, the lower side wall water pipe group, the upper side wall water pipe group, the middle side wall water pipe group, the first bottom group of water pipes, the second bottom group of water pipes, the bottom plate chamfering area water pipes and the top plate chamfering area water pipes are not more than 200 m.
According to the method for controlling the crack of the concrete of the subway station, the first group of top water pipes, the second group of top water pipes, the lower part water pipe group of the side wall, the upper part water pipe group of the side wall, the middle part water pipe group of the side wall, the first group of bottom water pipes and the second group of bottom water pipes are all arranged on the same vertical surface.
According to the method for controlling the crack of the concrete of the subway station, all the water pipes are metal pipes or plastic pipes with the pipe diameters of 30-70 mm.
According to the method for controlling the crack of the concrete of the subway station, water pipes are arranged near the construction joint, at the side wall and at the chamfer angle, cooling water pipes are arranged in a non-equidistant mode, cooling water pipes are arranged near the construction joint in a dense mode, and the cooling water pipes are arranged at intervals gradually increased from the chamfer angle of the top plate to the chamfer angle far away from the chamfer angle. The interlayer spacing of the cooling water pipe influences the efficiency of hydration heat of circulating water brought out of concrete, the smaller the spacing is, the better the heat removal effect is, and the temperature of the concrete is in gradient distribution, so that the hydration heat generated by newly-poured concrete on the upper part can be well utilized to heat the concrete poured on the lower part, the aim of the synergistic effect of the temperature of the whole concrete and the rising and falling is fulfilled, the temperature stress between the upper concrete and the lower concrete of a construction joint is greatly reduced, and the historical problem that a large number of cracks are generated near the construction joint due to the temperature stress is effectively solved.
Drawings
FIG. 1 is a cross-sectional view of a subway station constructed by the method for controlling cracking of subway station concrete according to the present invention;
fig. 2 is a view from a-a in fig. 1.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1 and 2, in the method for controlling cracking of concrete in a subway station according to the present invention, a bottom plate 100, two side walls 200, and a top plate 300 form a frame structure, and a vertical column 400 is disposed between the middle portions of the bottom plate 100 and the top plate 300.
Example 1
The crack control method is carried out after the binding of the structural steel bars is finished and comprises the following steps:
step one, symmetrically arranging a water pipe at a position which is 125mm away from the upper part and the lower part of a lower construction joint 10 generated by a bottom plate 100 and a side wall 200 to form a first group of water pipes 1a at the bottom; symmetrically arranging a water pipe at a position which is 125mm away from the upper part and the lower part of an upper construction joint 20 generated by the top plate 300 and the side wall 200 to form a first group of water pipes 1b at the top; symmetrically arranging a water pipe at a position 250mm above and below the first group of water pipes 1a at the bottom to form a second group of water pipes 2a at the bottom; a water pipe is symmetrically arranged at a position 250mm away from the upper part and the lower part of the first group of water pipes 1b at the top, and is a second group of water pipes 2b at the top;
secondly, taking the sewer pipes of the second group of water pipes 2a at the bottom as initial positions, and distributing a plurality of water pipes in the chamfer area of the bottom plate 100 in a mode of gradually increasing the interval distance from 450mm to 550mm in a rectangular array mode to form water pipes 3 in the chamfer area of the bottom plate;
connecting the water pipes 3 in the chamfered area of the bottom plate, the sewer pipes of the second group of water pipes 2a at the bottom and the sewer pipes of the first group of water pipes 1a at the bottom in a snake-shaped wiring manner in sequence to form a bottom plate cooling water pipeline with an inlet and an outlet;
taking the water feeding pipe of the second group of water pipes 2b at the top as an initial position, and distributing a plurality of water pipes in the chamfer area of the top plate 300 in a mode of gradually increasing the interval distance from 450mm to 550mm in a rectangular array mode to form a water pipe 4 in the chamfer area of the top plate;
connecting the water pipes 4 of the top plate chamfer area, the water feeding pipes of the second group of water pipes 2b at the top and the water feeding pipes of the first group of water pipes 1b at the top in sequence in a snake-shaped wiring manner to form a top plate cooling water pipeline with an inlet and an outlet;
sixthly, arranging water pipes at intervals of 250mm on the side wall 200 between the upper water pipe of the second group of water pipes 2a at the bottom and the first height above the lower construction joint 10 to form a side wall lower water pipe group 5; the first height is one fourth of the height of the lower construction joint 10 to the upper construction joint 20;
arranging water pipes at intervals of 250mm on the side wall 200 between the sewer pipe of the second group of water pipes 2b at the top and the second height below the upper construction joint 20 to form a water pipe group 6 at the upper part of the side wall; the second height is one fourth of the height of the lower construction joint 10 to the upper construction joint 20;
arranging water pipes at intervals of 450mm on a side wall 200 between the uppermost water pipe of the side wall lower water pipe group 5 and the lowermost water pipe of the side wall upper water pipe group 6 to form a side wall middle water pipe group 7;
connecting the lower water pipes of the first group of water pipes 1b at the top, the lower water pipes of the second group of water pipes 2b at the top, the upper water pipe group 6 of the side wall, the middle water pipe group 7 of the side wall, the lower water pipe group 5 of the side wall, the upper water pipes of the second group of water pipes 2a at the bottom and the lower water pipes of the first group of water pipes 1a at the bottom in a snake-shaped wiring manner in sequence to form a side wall cooling water pipeline with an inlet and an outlet;
step eight, respectively carrying out water pressing tests on the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline to ensure that all the pipelines are watertight;
step nine, when the side wall 200 concrete is poured, communicating an inlet of the bottom plate cooling water pipeline with an outlet of the side wall cooling water pipeline; inlet for side wall cooling water pipe when concrete completely covers the side wall cooling water pipeWater is introduced, and the water flow is firstly controlled to be 4m3H, until the internal temperature of the concrete reaches the maximum value, reducing the water flow to 2m3H, continuously introducing water for 24 hours; when the top plate 300 concrete is poured, communicating an inlet of the side wall cooling water pipeline with an outlet of the top plate cooling water pipeline; when the concrete completely covers the top plate cooling water pipeline, water is introduced to the inlet of the top plate cooling water pipeline; firstly controlling the water flow to be 4m3H, until the internal temperature of the concrete reaches the maximum value, reducing the water flow to 2m3H, continuously introducing water for 24 hours;
step ten, after the construction is finished, grouting the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline by using cement paste or mortar with the strength not lower than that of concrete.
The crack control effect of the embodiment is good.
Example 2
The invention discloses a method for controlling the crack of subway station concrete, relating to a subway station, which is characterized in that a frame structure is formed by a bottom plate 100, two side walls 200 and a top plate 300, and a vertical column 400 is arranged between the middle parts of the bottom plate 100 and the top plate 300. The crack control method is carried out after the binding of the structural steel bars is finished and comprises the following steps:
step one, symmetrically arranging a water pipe at a position which is 150mm away from the upper part and the lower part of a lower construction joint 10 generated by a bottom plate 100 and a side wall 200 to form a first group of water pipes 1a at the bottom; symmetrically arranging a water pipe at a position which is 150mm away from the upper part and the lower part of an upper construction joint 20 generated by the top plate 300 and the side wall 200 to form a first group of water pipes 1b at the top; symmetrically arranging a water pipe at a position 300mm above and below the first group of water pipes 1a at the bottom to form a second group of water pipes 2a at the bottom; symmetrically arranging a water pipe at a position 300mm above and below the first group of water pipes 1b at the top, wherein the water pipe is a second group of water pipes 2b at the top;
secondly, taking the sewer pipes of the second group of water pipes 2a at the bottom as initial positions, and distributing a plurality of water pipes in the chamfer area of the bottom plate 100 in a mode of gradually increasing the interval distance from 450mm to 550mm in a rectangular array mode to form water pipes 3 in the chamfer area of the bottom plate;
connecting the water pipes 3 in the chamfered area of the bottom plate, the sewer pipes of the second group of water pipes 2a at the bottom and the sewer pipes of the first group of water pipes 1a at the bottom in a snake-shaped wiring manner in sequence to form a bottom plate cooling water pipeline with an inlet and an outlet;
taking the water feeding pipe of the second group of water pipes 2b at the top as an initial position, and distributing a plurality of water pipes in the chamfer area of the top plate 300 in a mode of gradually increasing the interval distance from 450mm to 550mm in a rectangular array mode to form a water pipe 4 in the chamfer area of the top plate;
connecting the water pipes 4 of the top plate chamfer area, the water feeding pipes of the second group of water pipes 2b at the top and the water feeding pipes of the first group of water pipes 1b at the top in sequence in a snake-shaped wiring manner to form a top plate cooling water pipeline with an inlet and an outlet;
sixthly, arranging water pipes at intervals of 300mm on the side wall 200 between the upper water pipe of the second group of water pipes 2a at the bottom and the first height above the lower construction joint 10 to form a side wall lower water pipe group 5; the first height is one fourth of the height of the lower construction joint 10 to the upper construction joint 20;
arranging water pipes at intervals of 300mm on the side wall 200 between the sewer pipe of the second group of water pipes 2b at the top and the second height below the upper construction joint 20 to form a water pipe group 6 at the upper part of the side wall; the second height is one quarter of the height of the lower construction joint 10 to the upper construction joint 20
Arranging water pipes at intervals of 550mm on the side wall 200 between the uppermost water pipe of the side wall lower water pipe group 5 and the lowermost water pipe of the side wall upper water pipe group 6 to form a side wall middle water pipe group 7;
connecting the lower water pipes of the first group of water pipes 1b at the top, the lower water pipes of the second group of water pipes 2b at the top, the upper water pipe group 6 of the side wall, the middle water pipe group 7 of the side wall, the lower water pipe group 5 of the side wall, the upper water pipes of the second group of water pipes 2a at the bottom and the lower water pipes of the first group of water pipes 1a at the bottom in a snake-shaped wiring manner in sequence to form a side wall cooling water pipeline with an inlet and an outlet;
step eight, respectively carrying out water pressing tests on the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline to ensure that all the pipelines are watertight;
step nine, when pouring the side wall concreteThe inlet of the bottom plate cooling water pipeline is communicated with the outlet of the side wall cooling water pipeline; when the concrete completely covers the side wall cooling water pipeline, water is introduced to the inlet of the side wall cooling water pipeline, and the water flow is firstly controlled to be 6m3H, until the internal temperature of the concrete reaches the maximum value, reducing the water flow to 4m3H, continuously introducing water for 12 hours; when the top plate concrete is poured, communicating an inlet of the side wall cooling water pipeline with an outlet of the top plate cooling water pipeline; when the concrete completely covers the top plate cooling water pipeline, water is introduced to the inlet of the top plate cooling water pipeline; firstly controlling the water flow to be 6m3H, until the internal temperature of the concrete reaches the maximum value, reducing the water flow to 4m3H, continuously introducing water for 12 hours;
step ten, after the construction is finished, grouting the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline by using cement paste or mortar with the strength not lower than that of concrete.
The crack control effect of the embodiment is good.
Compared with the prior art, the method for controlling the crack of the subway station concrete has the following characteristics:
1. the mode that the cooling water pipes are arranged at equal intervals in the prior art is changed, and the arrangement modes with different density degrees are adopted for different positions, so that the arrangement of the water pipes is greatly reduced, the construction cost is saved, meanwhile, the pipeline arrangement corresponds to the concrete pouring construction, each time of the arrangement construction, the cooling water pipeline is only provided with one inlet and outlet, and the arrangement and the management are very simple;
2. cooling water pipes are densely distributed near all construction joints, hydration heat generated by newly-poured concrete at the upper part can be well utilized to heat the concrete poured at the lower part, the temperature difference stress between the upper concrete and the lower concrete of the construction joints is greatly reduced, and the historical problem that a large number of cracks are generated near the construction joints due to the temperature stress is perfectly solved;
3. the water pipes are arranged at intervals which are gradually increased from the chamfer angles of the top plate and the bottom plate to the positions far away from the chamfer angles, so that the temperature of the concrete is distributed in a gradient manner, and the phenomenon that cracks are generated on the whole structure due to excessive temperature difference stress is further reduced;
4. the water pipe arrangement mode adopted by the invention has ideal crack control effect on concrete in the subway station and wide application prospect.
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 and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (3)
1. The method for controlling the cracking of the concrete of the subway station is characterized by being carried out after the binding of the structural steel bars is finished and comprising the following steps of:
step one, symmetrically arranging a water pipe at a position 125-150 mm away from the upper part and the lower part of a lower construction joint generated by a bottom plate and a side wall to form a first group of water pipes at the bottom; symmetrically arranging a water pipe at a position 125-150 mm away from the upper and lower parts of an upper construction joint generated by the top plate and the side wall to form a first group of water pipes at the top; symmetrically arranging a water pipe at a position 250-300 mm away from the upper part and the lower part of the first group of water pipes at the bottom to form a second group of water pipes at the bottom; symmetrically arranging a water pipe at a position 250-300 mm away from the upper part and the lower part of the first group of water pipes at the top to form a second group of water pipes at the top;
taking the sewer pipes of the second group of water pipes at the bottom as initial positions, and distributing a plurality of water pipes in a chamfer area of the bottom plate in a mode of gradually increasing the interval distance of 450mm to 550mm and in a rectangular array mode to form water pipes in the chamfer area of the bottom plate;
connecting water pipes in a base plate chamfering area, a sewer pipe of a second group of water pipes at the bottom and a sewer pipe of a first group of water pipes at the bottom in sequence in a snake-shaped wiring mode to form a base plate cooling water pipeline with an inlet and an outlet;
taking the water feeding pipe of the second group of water pipes at the top as an initial position, and distributing the plurality of water pipes in the chamfer area of the top plate in a mode of gradually increasing the interval distance from 450mm to 550mm in a rectangular array mode to form water pipes in the chamfer area of the top plate;
connecting water pipes in a top plate chamfering area, a second group of water pipes on the top and a first group of water pipes on the top in a snake-shaped wiring manner to form a top plate cooling water pipeline with an inlet and an outlet;
arranging water pipes at intervals of 250-300 mm on the side wall between an upper water pipe of a second group of water pipes at the bottom and a first height above a lower construction joint to form a side wall lower water pipe group, wherein the first height is one fourth of the height of the lower construction joint to the upper construction joint;
arranging water pipes at intervals of 250-300 mm on the side wall between the sewer pipe of the second group of water pipes at the top and the second height below the upper construction joint to form a water pipe group on the upper part of the side wall, wherein the second height is one fourth of the height of the upper construction joint from the lower construction joint;
arranging water pipes every 450-550 mm on the side wall between the uppermost water pipe of the lower water pipe group of the side wall and the lowermost water pipe of the upper water pipe group of the side wall to form a middle water pipe group of the side wall;
the top first group of water pipes, the top second group of water pipes, the side wall lower part water pipe group, the side wall upper part water pipe group, the side wall middle part water pipe group, the bottom first group of water pipes and the bottom second group of water pipes are all arranged on the same vertical surface;
connecting the lower water pipes of the first group of water pipes at the top, the lower water pipes of the second group of water pipes at the top, the upper water pipe group of the side wall, the middle water pipe group of the side wall, the lower water pipe group of the side wall, the upper water pipes of the second group of water pipes at the bottom and the lower water pipes of the first group of water pipes at the bottom in a snake-shaped wiring manner in sequence to form a side wall cooling water pipeline with an inlet and an outlet;
step eight, respectively carrying out water pressing tests on the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline to ensure that all the pipelines are watertight;
step nine, when the side wall concrete is poured, communicating an inlet of the bottom plate cooling water pipeline with an outlet of the side wall cooling water pipeline; when the concrete completely covers the side wall cooling water pipeline, water is introduced to the inlet of the side wall cooling water pipeline, and the water flow is firstly controlled to be 4-6 m3H until coagulationThe temperature in the soil reaches the maximum value, and then the water flow is reduced to 2-4 m3Continuing introducing water for 12-24 hours; when the top plate concrete is poured, communicating an inlet of the side wall cooling water pipeline with an outlet of the top plate cooling water pipeline; when the concrete completely covers the top plate cooling water pipeline, water is introduced to the inlet of the top plate cooling water pipeline; firstly controlling the water flow to be 4-6 m3H, reducing the water flow to 2-4 m until the internal temperature of the concrete reaches the maximum value3Continuing introducing water for 12-24 hours;
step ten, after the construction is finished, grouting the bottom plate cooling water pipeline, the top plate cooling water pipeline and the side wall cooling water pipeline by using cement paste or mortar with the strength not lower than that of concrete.
2. The method of claim 1, wherein the lengths of the top first group of water tubes, the top second group of water tubes, the side wall lower part water tube group, the side wall upper part water tube group, the side wall middle part water tube group, the bottom first group of water tubes, the bottom second group of water tubes, the bottom plate chamfer area water tubes and the top plate chamfer area water tubes are not more than 200 m.
3. The method for controlling the crack of the concrete of the subway station as claimed in claim 1, wherein all the water pipes are metal pipes or plastic pipes with the pipe diameter of 30-70 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474037.2A CN109537626B (en) | 2018-12-04 | 2018-12-04 | Subway station concrete crack control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474037.2A CN109537626B (en) | 2018-12-04 | 2018-12-04 | Subway station concrete crack control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109537626A CN109537626A (en) | 2019-03-29 |
| CN109537626B true CN109537626B (en) | 2020-11-20 |
Family
ID=65852686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811474037.2A Active CN109537626B (en) | 2018-12-04 | 2018-12-04 | Subway station concrete crack control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109537626B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700311A (en) * | 2019-07-01 | 2020-01-17 | 中建五局土木工程有限公司 | One-step molding construction method for open-cut large-span double-hole broken line arch tunnel large-volume concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425685A (en) * | 2018-01-22 | 2018-08-21 | 中交上海三航科学研究院有限公司 | A kind of Concrete Crack Control method based on cast-in-place tunnel |
-
2018
- 2018-12-04 CN CN201811474037.2A patent/CN109537626B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425685A (en) * | 2018-01-22 | 2018-08-21 | 中交上海三航科学研究院有限公司 | A kind of Concrete Crack Control method based on cast-in-place tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 大型沉管隧道混凝土管段混凝土裂缝控制技术;王光辉;《现代隧道技术》;20090228;第46卷(第1期);第37-38页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109537626A (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102322623B (en) | Coke oven top waste heat reclaiming system | |
| CN103266772B (en) | Curing method used for highway engineering construction concrete in winter | |
| CN204059978U (en) | The temperature-controlled cooling system of large volume concrete structural | |
| CN111472358B (en) | Cooling method for interior of mass concrete foundation | |
| CN109537626B (en) | Subway station concrete crack control method | |
| CN204984424U (en) | Prevent submerged cushion device of opening shield tail pipe piece | |
| WO2007143885A1 (en) | An insulated and soundproof block and a masonry method thereof | |
| CN111064155B (en) | Calandria array installation and encapsulation construction method | |
| CN108425685B (en) | Concrete crack control method based on cast-in-place tunnel | |
| CN203389471U (en) | Ceramic water film dust collector | |
| CN208309589U (en) | Large volume, deep basal pit bottom rotary type appts. for transferring ready-mixed concrete | |
| CN203347203U (en) | Multi-functional super-thick bulked concrete steel tube support system | |
| CN107762053A (en) | Prefabricated basement pipeline module and preparation method thereof | |
| CN104533462A (en) | Tunnel lining concrete thermal insulation system | |
| CN104453236B (en) | Circulating water natural cooling system for controlling large-volume concrete cracks and construction method | |
| CN101793073B (en) | Novel light aggregate concrete building block and using method thereof | |
| CN202203915U (en) | Cock oven top exhaust heat recovery system | |
| CN114892665B (en) | Construction method of large-volume concrete cooling water pipe | |
| CN209293262U (en) | Prefabricated hollow round pipe cast-in-place concrete building floor | |
| CN208183950U (en) | A kind of prefabricated foundation raft board concrete leads wall | |
| CN100520264C (en) | Furnace brickwork using metal anchor device as framework and its construction technology | |
| CN112922383B (en) | Thermal barrier structure for energy-saving updating and reconstruction of external protective structure of existing building | |
| CN111910909A (en) | Heat insulation formwork applicable to overhead structure and construction method thereof | |
| CN103805723A (en) | Rapid blast furnace hot-air pipeline cross section refractory brick dropping repairing equipment and method | |
| CN111844354B (en) | Design method of recycled concrete composite self-insulation building block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |