CN111287203B - Box type water filling cofferdam structure and mounting and dismounting construction method - Google Patents
Box type water filling cofferdam structure and mounting and dismounting construction method Download PDFInfo
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- CN111287203B CN111287203B CN202010110201.2A CN202010110201A CN111287203B CN 111287203 B CN111287203 B CN 111287203B CN 202010110201 A CN202010110201 A CN 202010110201A CN 111287203 B CN111287203 B CN 111287203B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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Abstract
The invention provides a box-type water-filling cofferdam structure and an installation and removal construction method thereof. The steel pipe frame and the steel plate are adopted to meet the requirements of the cofferdam on the body shape and the structural stress; the water quantity in the box-type cofferdam is controlled by arranging the flap valve, so that the overall weight of the cofferdam is controlled, and the problems of bottom water stop, overall stability and hoisting are solved; the problems of lateral water leakage and shape adaptation during repeated installation of the cofferdam are solved by arranging the inflatable water-stop bags at the two ends of the cofferdam. By combining the structural characteristics, a feasible construction method is provided, and the feasibility and the reliability of the cofferdam structure are ensured. The cofferdam structure solves the problems of desilting, reconstruction and construction of municipal box culvert in rainy season and structural design and construction of the cofferdam under the condition that the water depth of the water retaining is less than 3.0 m.
Description
Technical Field
The invention relates to a box type water-filled cofferdam structure and an installation and dismantling construction method, which are suitable for the design and construction of the cofferdam structure under the conditions of municipal box culvert in rainy season and water retaining depth less than 3.0 m.
Background
In municipal water environment treatment engineering construction, because of time tightness and heavy tasks, municipal box culverts are often required to be desilted and transformed in rainy seasons, and cofferdams are required to be constructed in the box culverts so as to form dry land construction conditions. However, in rainy season, the cofferdam must be dismantled before rainwater arrives to ensure normal flood discharge of the box culvert, and after the rainwater passes, the cofferdam is built again for construction, and such repetition may last for many times. Therefore, the cofferdam which is very convenient and quick to install and dismantle is needed to meet the construction requirement in rainy season.
Disclosure of Invention
The invention aims to provide a box-type water-filled cofferdam structure with a simple, convenient and quick structure and an installation and removal construction method, and aims to solve the problems of cofferdam structure design and construction under the conditions that municipal box culvert is desilted and reconstructed in rainy season and the water depth of a water retaining is less than 3.0 m.
According to the first aspect of the invention, the following technical scheme is adopted:
the utility model provides a box formula of filling with water cofferdam structure which characterized in that: the cofferdam structure comprises a box-type structure consisting of steel pipes and steel plates, so that the stability of the cofferdam structure is ensured, and the length of the box-type structure is slightly shorter than the width of a gallery of a box culvert; the downstream side of the box-type structure is provided with a flap valve, and the cofferdam structure is provided with a flap valve control rod which can artificially assist in controlling the water inlet and outlet of the cofferdam structure; the two ends of the box-type structure of the cofferdam structure are externally provided with an inflatable water stop bag, so that the two ends of the cofferdam structure are ensured to be tightly contacted with the side wall of the box culvert, and water leakage is prevented; under the working condition, water is filled in the box-type structure so as to increase the whole weight of the cofferdam structure and ensure the stability of the cofferdam and the water stop at the bottom.
Further: cofferdam structure size according to water retaining depth H0And determining the width of the box culvert; height H of box structure is 1.5H0Width W of box structure is 0.5H0And the length L of the box-type structure is equal to the width of the box culvert, namely-0.3 m.
Further: the box-type structure comprises a plurality of groups of parallel longitudinal, transverse and vertical steel pipes which are arranged along the length direction, the width direction and the height direction of the cofferdam to form an internal supporting frame of the box-type structure, then steel plates are laid on the bottom surface, two side surfaces, the upstream and downstream surfaces of the frame and are firmly welded with the steel pipes, the steel plates are also firmly welded, and water tightness is ensured.
Further: the flap valve is near the bottom of the box-type structure.
Further: the top of the box-type structure is provided with a connecting structure of a hoisting rope.
According to the second aspect of the invention, the following technical scheme is adopted:
a construction method for installing and dismantling a box type water-filled cofferdam structure is characterized in that:
the installation and construction steps of the box-type water-filling cofferdam structure are as follows:
(1) cleaning the foundation of the gallery cofferdam;
(2) and the cofferdam structure is in place: the manufactured cofferdam structure is lifted to the top of the gallery by adopting lifting equipment and matching with manpower, the direction and the position are adjusted, the cofferdam structure slowly descends, and the water in the gallery can flow into the cofferdam structure from the flap valve, so the cofferdam structure can descend to the bottom by depending on the weight of the cofferdam structure;
(3) the cofferdam structure is filled with water and water stop and is inflated: after the cofferdam structure reaches the bottom, the flap valve is closed by using the control rod, then water is filled into the box-type structure, and the water level is higher than the water level of the gallery, so that the weight of the box-type water-filled cofferdam is increased, and the water stopping effect of the bottom is ensured; after the water filling is finished, inflating the inflatable water-stopping bags at the two sides of the box-type water-filling cofferdam until the inflatable water-stopping bags are tightly and firmly contacted with the side wall of the gallery;
the withdrawing construction steps of the box-type water-filling cofferdam structure are as follows:
after construction is finished or required for corridor flood discharge, connecting the box-type water-filled cofferdam with hoisting equipment; the flap valve is opened by utilizing the control rod, water in the box-type water-filled cofferdam is discharged to the downstream from the flap valve, the air inflation and water stop bags on the two sides of the box-type water-filled cofferdam are deflated, and the lifting equipment slowly lifts the box-type water-filled cofferdam after water and air are deflated until the box-type water-filled cofferdam is moved out.
The invention has the beneficial effects that: the steel pipe frame and the steel plate are adopted to meet the requirements of the cofferdam on the body shape and the structural stress; the water quantity in the box-type cofferdam is controlled by arranging the flap valve, so that the overall weight of the cofferdam is controlled, and the problems of bottom water stop, overall stability and hoisting are solved; the problems of lateral water leakage and shape adaptation during repeated installation of the cofferdam are solved by arranging the inflatable water-stop bags at the two ends of the cofferdam. By combining the structural characteristics, a feasible construction method is provided, and the feasibility and the reliability of the cofferdam structure are ensured. The cofferdam structure solves the problems of desilting, reconstruction and construction of municipal box culvert in rainy season and structural design and construction of the cofferdam under the condition that the water depth of the water retaining is less than 3.0 m.
Drawings
FIG. 1 is a front view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an embodiment of the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, the present embodiment is a box-type water-filling cofferdam structure, which is used for building a cofferdam in municipal box culvert water so as to form dry land construction conditions.
The cofferdam structure comprises a box-type structure, the box-type structure comprises a plurality of groups of parallel longitudinal steel pipes 1, transverse steel pipes 2 and vertical steel pipes 3 which are arranged along the length direction, the width direction and the height direction of the cofferdam to form an internal supporting frame of the box-type structure, then steel plates 4 are laid on the bottom surface, two side surfaces and the upstream and downstream surfaces of the frame and are firmly welded with the steel pipes, and the steel plates are also firmly welded to ensure that the water is not leaked.
The cofferdam structure is provided with the inflatable water-stop bags 5 outside the two ends of the box-type structure, the materials are made of rubber, and one surface of the cofferdam structure is fixed on the steel plates at the two ends of the box-type structure by bolts or glue, so that firmness, tightness and impermeability are ensured. The inflation inlet is arranged at the top, and the thickness after inflation is about 15 cm.
2-3 rectangular flap valves 6 and flap valve control rods 7 are arranged on the inner side of the downstream surface of the box-type structure, and the flap valves 6 are arranged as close to the bottom as possible. The flap valve 6 has the functions that when the cofferdam structure is constructed in place, water in the gallery can automatically enter the box-type structure, so that the cofferdam structure can be conveniently and accurately positioned at a designed position, the self weight can be kept by means of non-return of a water level difference after water injection, the sealing property between the box-type water-filled cofferdam and the bottom and the safety of downstream construction are kept, and the flap valve 6 can artificially assist in controlling water discharge and water inlet.
The top of the box-type structure is provided with a hoisting rope 8, which is convenient for the installation and the withdrawal of the cofferdam structure.
The pipe diameters of the longitudinal steel pipes 1, the transverse steel pipes 2 and the vertical steel pipes 3 are phi 51, the wall thicknesses are 3mm, and the steel pipes are connected or welded through fasteners. The thickness of the steel plate 4 is 0.5-1.0 cm.
Cofferdam structure size according to water retaining depth H0And determining the width of the box culvert. Height H of box structure is 1.5H0Width W of the box structure is 0.5H0The length L of the box-type structure is equal to the width of the box culvert, namely-0.3 m; the number of the longitudinal steel pipes 1 on the upstream surface and the downstream surface is determined according to the height of the box-type structure, 3-4 steel pipes are arranged, and the distance between every two steel pipes is about 1.0 m; the number of the transverse steel pipes 2 is determined according to the height of the box-type structure, 3-4 transverse steel pipes are arranged, the distance between the two steel pipes is about 1.0m, and the row spacing is about 1.5 m; 2 vertical steel pipes 3 are arranged, and the distance between the two steel pipes is 0.5H0The row spacing is about 1.5 m.
The installation and construction method of the box-type water-filling cofferdam structure of the embodiment comprises the following steps:
(1) cleaning a gallery cofferdam foundation: the long-arm backhoe is matched with other small-sized appliances to clean the foundation of the gallery cofferdam, so that the cofferdam structure is ensured to be in close contact with a gallery bottom plate.
(2) And the cofferdam structure is in place: the cofferdam structure which is manufactured and is not filled with water and gas is lifted to the top of the gallery by adopting lifting equipment and matching with manpower, the direction and the position are adjusted, the cofferdam structure slowly descends, and the water in the gallery can flow into the cofferdam structure from the flap valve, so the cofferdam structure can descend to the bottom by depending on the weight of the cofferdam structure.
(3) The cofferdam structure is filled with water and water stop and is inflated: after the cofferdam structure reaches the bottom, the flap valve 6 is closed by using the control rod 7, then water is filled into the box-type structure, and the water level is about 50cm higher than the water level of the gallery, so that the weight of the box-type water-filled cofferdam (dead weight and water weight) is increased, and the water stopping effect at the bottom is ensured. And after the water filling is finished, inflating the inflating and water stopping bags 5 at the two sides of the box type water filling cofferdam until the water filling is tightly and firmly contacted with the side wall of the corridor.
And after the box-type water-filling cofferdam structure is installed, performing drainage and construction on the downstream of the box-type water-filling cofferdam, draining the downstream of the cofferdam by using pumping equipment, and then performing dredging and reconstruction construction.
The evacuation construction method of the box-type water-filling cofferdam structure of the embodiment is as follows:
after the construction is finished (or the corridor needs flood drainage), the box-type water-filled cofferdam is well connected with the hoisting equipment. The flap valve 6 is opened by the control rod 7, water in the box-type water-filled cofferdam is discharged to the downstream from the flap valve 6, and the flap valve 6 is closed after the water is discharged. And slowly deflating the inflatable water-stop bags on the two sides of the box-type water-filled cofferdam. And the lifting equipment slowly lifts the box-type water-filled cofferdam after water and air are discharged until the box-type water-filled cofferdam is moved out.
Because the section sizes of the upper and lower streams of the gallery are basically the same, and because the box-type structure of the box-type water-filling cofferdam is slightly narrower than the width of the gallery and the two sides are sealed by the air-filled water-stop bags 5 in a conformal manner, the cofferdam structure is convenient and quick to install and dismantle and can be repeatedly applied in construction.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. A construction method for installing and dismantling a box type water-filled cofferdam structure is characterized in that:
the box-type water-filling cofferdam structure comprises a box-type structure consisting of steel pipes and steel plates, so that the stability of the cofferdam structure is ensured, and the length of the box-type structure is slightly shorter than the width of a gallery of a box culvert; the downstream side of the box-type structure is provided with a flap valve, and the cofferdam structure is provided with a flap valve control rod which can artificially assist in controlling the water inlet and outlet of the cofferdam structure; the two ends of the box-type structure of the cofferdam structure are externally provided with an inflatable water stop bag, so that the two ends of the cofferdam structure are ensured to be tightly contacted with the side wall of the gallery, and water leakage is prevented; under the working state, water is filled in the box-type structure so as to increase the whole weight of the cofferdam structure and ensure the stability of the cofferdam and the water stop at the bottom; the flap valve is close to the bottom of the box-type structure; when the cofferdam structure is in place, water in a gallery at the downstream of the cofferdam structure can automatically flow into the cofferdam structure from the flap valve, so that the cofferdam structure can descend to the bottom by the self weight;
cofferdam structure size according to water retaining depth H0And determining the width of the box culvert; box structure height H = 1.5H0Width of box structure W =0.5H0The length L of the box-type structure = the width of the box culvert-0.3 m;
the box-type structure comprises a plurality of groups of parallel longitudinal steel pipes arranged along the length direction of the cofferdam, a plurality of groups of parallel transverse steel pipes arranged along the width direction of the cofferdam and a plurality of groups of parallel vertical steel pipes arranged along the height direction of the cofferdam to form an internal supporting frame of the box-type structure, then steel plates are laid on the bottom surface, two side surfaces and upstream and downstream surfaces of the frame and are firmly welded with the steel pipes, and the steel plates are also firmly welded to ensure that the water cannot leak;
the top of the box-type structure is provided with a connecting structure of a hoisting rope;
the installation and construction steps of the box-type water-filling cofferdam structure are as follows:
(1) cleaning the foundation of the gallery cofferdam;
(2) and the cofferdam structure is in place: the manufactured cofferdam structure is lifted to the top of the gallery by adopting lifting equipment and matching with manpower, the direction and the position are adjusted, the cofferdam structure slowly descends, and the water in the gallery can flow into the cofferdam structure from the flap valve, so the cofferdam structure can descend to the bottom by depending on the weight of the cofferdam structure;
(3) the cofferdam structure is filled with water and water stop and is inflated: after the cofferdam structure reaches the bottom, the flap valve is closed by using the control rod, and then water is filled into the box-type structure, wherein the water level is higher than the water level of the gallery, so that the weight of the cofferdam structure is increased, and the water stopping effect of the bottom is ensured; after the water filling is finished, inflating the inflatable water-stopping bags at the two sides of the cofferdam structure until the inflatable water-stopping bags are tightly and firmly contacted with the side wall of the gallery;
the dismantling construction steps of the box-type water-filling cofferdam structure are as follows:
after the construction is finished or the corridor needs flood discharge, connecting the cofferdam structure with the lifting equipment; the flap valve is opened by utilizing the control rod, water in the cofferdam structure is discharged to the downstream from the flap valve, the inflatable water-stop bags on the two sides of the cofferdam structure are deflated, and the lifting equipment slowly lifts the cofferdam structure after water and air are discharged until the cofferdam structure is moved out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110201.2A CN111287203B (en) | 2020-02-23 | 2020-02-23 | Box type water filling cofferdam structure and mounting and dismounting construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110201.2A CN111287203B (en) | 2020-02-23 | 2020-02-23 | Box type water filling cofferdam structure and mounting and dismounting construction method |
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| CN111287203A CN111287203A (en) | 2020-06-16 |
| CN111287203B true CN111287203B (en) | 2021-09-14 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6164949B2 (en) * | 2013-06-26 | 2017-07-19 | 株式会社技研製作所 | Filling reinforcement structure |
| CN107780423B (en) * | 2017-11-24 | 2024-03-19 | 河南水建集团有限公司 | Adjustable water cofferdam |
| CN110409378B (en) * | 2019-09-02 | 2021-02-09 | 黄河勘测规划设计研究院有限公司 | Non-water-stop maintenance method for large channel |
| CN212248299U (en) * | 2020-02-23 | 2020-12-29 | 中国电建集团华东勘测设计研究院有限公司 | Box type water filling cofferdam structure |
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