Flow guide channel and temporary navigation structure suitable for soft soil foundation

Abstract

The utility model discloses a diversion channel and temporary navigation structure suitable for a soft soil foundation, which comprises a reinforced concrete support, a reinforced concrete enclosing purlin, steel sheet pile walls, a concrete protection slope, a plain concrete protection bottom and a navigation anti-collision structure, the reinforced concrete supports and the reinforced concrete enclosing purlins are located at the bottom of the diversion channel, the concrete protection slopes are located on the two sides of the upper portion of the diversion channel, and the navigation anti-collision structures are located on the two sides of the diversion channel. The bottom reinforced concrete supports and the reinforced concrete enclosing purlins are used for controlling overturning stability and displacement of the steel sheet pile wall, and the navigation anti-collision structures on the two sides are used for navigating and preventing channel damage caused by accidental collision of ships. The device is small in occupied space and simple in structure, can avoid the problem that the slope of the open channel is easy to lose stability in the conventional slope excavation of the soft soil foundation, and can solve the problem of temporary relocation of a channel; the steel sheet pile wall is high in driving speed, can be repeatedly used and is low in construction cost.

Description

Technical Field

[0001] The utility model relates to construction diversion facilities in water conservancy projects and temporary waterways in port and waterway projects, and particularly relates to a diversion open channel and temporary navigation structure applicable to soft soil foundations. Background Technique

[0002] When constructing hydraulic buildings in coastal and riverine areas of our country, the project locations are often on soft soil foundations. The silt soil in the foundation has a high water content and poor physical and mechanical indexes. The excavated slopes are not easy to form for a long time and are prone to landslides during use, bringing great difficulties to project construction.

[0003] During the construction of hydraulic buildings, considering requirements such as flood control, waterlogging drainage, and navigation, it is necessary to divert the river water system through a diversion open channel and change the original shipping route through a temporary waterway. When implementing a traditional slope-cut excavation diversion open channel in a soft soil area, due to the poor physical and mechanical properties and creep of soft soil, slope sliding may occur, affecting the normal operation of the diversion open channel. If it occurs during the flood discharge period of the flood season, it will pose great safety risks to the project and the surrounding areas.

[0004] In many river networks in plain areas, many rivers themselves have navigation functions. When changing the river course through a diversion open channel, not only the diversion problem but also the navigation problem need to be considered. How to safely, quickly, and economically achieve the diversion and navigation of the river course change on soft soil foundations is a key problem to be solved in current water conservancy project construction. Content of the Utility Model

[0005] The utility model aims at the problems existing in the prior art, and provides a diversion open channel and temporary navigation structure applicable to soft soil foundations to solve the problems of diversion and navigation of the river course change on soft soil foundations, and achieve the purposes of meeting continuous navigation, increasing construction safety, shortening the construction period, reducing the floor area, and reducing project costs.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A diversion open channel and temporary navigation structure applicable to soft soil foundations, including a reinforced concrete support, a reinforced concrete collar, a steel sheet pile wall, a concrete slope protection, a plain concrete bottom protection, and a navigation and anti-collision structure. The steel sheet pile wall is located on both sides of the diversion open channel, the reinforced concrete support and the reinforced concrete collar are located at the bottom of the diversion open channel, the concrete slope protection is located on both upper sides of the diversion open channel, and the navigation and anti-collision structure is located on both sides of the diversion open channel; the bottom reinforced concrete collar and the reinforced concrete support can control the overturning stability and displacement of the steel sheet pile wall, the upper concrete slope protection can prevent damage caused by water flow scouring, and the navigation and anti-collision structures on both sides are used for navigation and preventing damage to the channel caused by ships accidentally hitting.

[0008] Furthermore, the reinforced concrete collar is in close contact with the steel sheet pile wall, and reinforced concrete braces are arranged at intervals between the reinforced concrete collars. The space between the reinforced concrete braces is protected against scouring by plain concrete bottom protection.

[0009] Furthermore, the navigation anti-collision structure is arranged in front of the steel sheet pile wall.

[0010] Furthermore, the navigation anti-collision structure includes a first steel pipe, a second steel pipe, a third steel pipe, a channel steel collar and anti-collision tires; the first steel pipe is inserted into the concave surface of the steel sheet pile wall, the channel steel collar is welded to the steel sheet pile wall, the second steel pipe is drilled and inserted with the third steel pipe and welded to form a combined structure, and is welded to the third steel pipe, and the anti-collision tires are suspended on the third steel pipe.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The present utility model can be used for river diversion and waterway realignment in soft soil foundations, solve the problem of difficult layout of diversion channels in soft soil foundations, and has the characteristics of high construction safety, short construction period, low project cost, small floor area, etc. It has high popularization and application value in the fields of construction diversion of water conservancy projects and temporary navigation of port and waterway projects. Description of the Drawings

[0013] Figure 1 is a schematic cross-sectional structure diagram during the operation period of the present utility model;

[0014] Figure 2 is a schematic cross-sectional structure diagram during the construction period of the present utility model;

[0015] Figure 3 is a schematic plan layout diagram of the diversion channel of the present utility model;

[0016] Figure 4 is a schematic elevation structure diagram of the navigation anti-collision structure of the present utility model;

[0017] Figure 5 is a schematic plan layout diagram of the navigation anti-collision structure of the present utility model;

[0018] Figure 6 is a schematic plan layout diagram of the project of the present utility model.

[0019] In the figure: 1 - diversion channel; 2 - reinforced concrete brace; 3 - reinforced concrete collar; 4 - navigation anti-collision structure; 5 - steel sheet pile wall; 6 - concrete slope protection; 7 - plain concrete bottom protection; 8 - steel brace; 9 - steel collar; 10 - steel corbel; 11 - cofferdam; 12 - outer river; 41 - first steel pipe; 42 - second steel pipe; 43 - third steel pipe; 44 - channel steel collar; 45 - rubber tire. Detailed Implementation Modes

[0020] The present utility model will be further described below in conjunction with the accompanying drawings.

[0021] As Figures 1 to 3 shown, a diversion open channel and temporary navigation structure 1 applicable to soft soil foundation of the present utility model includes steel sheet pile walls 5, reinforced concrete supports 2, reinforced concrete purlins 3, navigation and anti-collision structures 4, concrete slope protection 6 and plain concrete bottom protection 7. The steel sheet pile walls 5 are located on both sides of the diversion open channel 1, the reinforced concrete supports 2 and the reinforced concrete purlins 3 are located at the bottom of the diversion open channel 1, the navigation and anti-collision structures 4 are located on both sides of the diversion open channel 1, and the concrete slope protection 6 is located on both upper sides of the diversion open channel 1; the bottom reinforced concrete purlin 3 and the reinforced concrete support 2 play a role in controlling the overturning stability and displacement of the steel sheet pile wall 5, and the upper concrete slope protection 6 and the bottom plain concrete bottom protection 7 can prevent the destruction caused by water flow scouring. The navigation and anti-collision structures 4 on both sides are used for navigation and preventing the channel from being damaged due to accidental collision of ships.

[0022] As Figures 4 to 5 shown, the navigation and anti-collision structure 4 includes a first steel pipe 41 with a diameter of 273 mm, a second steel pipe 42 with a diameter of 168 mm, a third steel pipe 43 with a diameter of 219 mm, a channel steel purlin 44 and a rubber tire 45; the channel steel purlin 44 is welded to the steel sheet pile wall 5, the steel pipe 43 with a diameter of 219 mm is placed on the steel corbel 10, after a hole is formed in the steel pipe 43 with a diameter of 219 mm and the steel pipe 42 with a diameter of 168 mm is inserted and welded to form a combined structure, it is welded to the steel pipe 41 with a diameter of 273 mm, and the anti-collision rubber tire 45 is suspended on the steel pipe 43 with a diameter of 219 mm.

[0023] As Figure 6 shown, when constructing a sluice and pump project in the original river channel, the diversion open channel 1 is constructed first, and then the original river channel is intercepted by the cofferdam 11. The upstream incoming water is diverted through the diversion open channel 1, and the ships are rerouted through the diversion open channel 1 to ensure dry construction of the foundation pit.

[0024] The construction steps of the present utility model are as follows:

[0025] S1. When constructing a foundation pit in the middle of the river channel, it is necessary to first excavate the diversion open channel 1 beside the foundation pit. After the diversion open channel 1 is dug through, a transverse cofferdam 11 is constructed in the foundation pit. After the cofferdam 11 is repaired, the incoming water in the river channel can flow to the outer river 12 through the diversion open channel 1, creating dry construction conditions for the foundation pit. Ships can navigate between the diversion open channel 1 and the outer river 12.

[0026] S2. When constructing the diversion open channel 1, first determine the position and scale of the diversion open channel 1, and then after the site is leveled at the designed position, according to the surrounding environment and geological conditions, slope can be carried out at the better part of the upper soil body to reduce the vertical support height of the steel sheet pile wall 5 and increase the flow-through area at the same time.

[0027] S3. Drive two rows of steel sheet pile walls 5 and steel pipes 41 with a diameter of 273 mm at the designed positions. The length of the steel sheet pile walls 5 is determined through stability calculation of foundation pit support according to the depth of the diversion channel 1. The bottom elevations of the inlet and outlet of the diversion channel 1 are comprehensively determined according to the river bottom elevation, hydraulic calculation of the diversion, and the draft (waterway level) of passing ships. The width of the diversion channel 1 is determined according to the flow demand of the river and the waterway level.

[0028] S4. Excavate the soil between the two rows of steel sheet pile walls 5 to 0.5 m below the installation elevation of the steel supports 8, and then construct the steel corbels 10, steel wales 9, and steel supports 8. The steel wales 9 are made of double - spliced I - beams with dimensions of 450 mm×154 mm×15.5 mm×18 mm, and 20 - mm - thick steel backing plates are provided on both sides. The steel supports 8 are made of steel pipes with a diameter of 609 mm and a wall thickness of 16 mm, and the spacing is determined through stability calculation of foundation pit support according to the depth of the diversion channel 1.

[0029] S5. Subsequently, excavate the soil between the two rows of steel sheet pile walls 5 to the designed bottom elevation of the bottom reinforced concrete supports 2 and reinforced concrete wales 3. The dimensions, reinforcement, and the spacing of the reinforced concrete supports 2 are determined through stability calculation of foundation pit support according to the depth of the diversion channel 1.

[0030] S6. After the diversion channel 1 is excavated to the bottom, construct the bottom reinforced concrete supports 2, reinforced concrete wales 3, and the plain concrete bottom protection 7 between the reinforced concrete supports 2. After the concrete reaches 100% of the designed strength, remove the upper steel supports 8 and steel wales 9.

[0031] S7. Then construct the navigation and anti - collision structures 4 on both sides of the diversion channel 1. The channel steel wales 44 are welded to the steel sheet pile walls 5. The steel pipes 43 with a diameter of 219 mm are placed on the steel corbels 10. After drilling holes in the steel pipes 43 with a diameter of 219 mm and inserting steel pipes 42 with a diameter of 168 mm and welding them to form a combined structure, it is welded to the steel pipes 41 with a diameter of 273 mm, and the anti - collision tires 45 are suspended on the steel pipes 43 with a diameter of 219 mm.

[0032] S8. After the implementation of the diversion channel 1 is completed, the original river channel can be intercepted through the cofferdam 11. The upstream water flow is diverted through the diversion channel 1, and the ships are rerouted through the diversion channel 1, thus ensuring dry - land construction of the foundation pit.

[0033] After the diversion channel 1 is no longer in use, first remove the cofferdam 11. Then, build small cofferdams at the upstream and downstream openings of the diversion channel 1, drain the water in the diversion channel 1, remove the navigation and anti-collision structure 4, reconstruct the steel supports 8 and steel purlins 9. After the construction is completed, remove the bottom reinforced concrete support 2, the reinforced concrete purlin 3, and the plain concrete bottom protection 7 between the reinforced concrete supports 2. Then, backfill the soil to 0.5 m below the installation elevation of the steel support 8. Next, remove the steel corbels 10, the steel purlins 9, and the steel supports 8. Then, backfill the soil to the elevation of the top of the sheet pile wall 5. Pull out the sheet pile wall 5 and remove the upper concrete slope protection 6. Finally, backfill the soil to the current ground elevation.

[0034] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A diversion open channel and temporary navigation structure suitable for soft soil foundation, characterized by: It includes reinforced concrete supports, reinforced concrete purlins, steel sheet pile walls, concrete slope protection and navigation anti-collision structures. The steel sheet pile walls are located on both sides of the diversion open channel, the reinforced concrete supports and reinforced concrete purlins are located at the bottom of the diversion open channel, the concrete slope protection is located on both sides of the upper part of the diversion open channel, and the navigation anti-collision structure is located on both sides of the diversion open channel.

2. The diversion open channel and temporary navigation structure suitable for soft soil foundation according to claim 1 is characterized by: The reinforced concrete purlins are in close contact with the steel sheet pile wall, reinforced concrete supports are arranged at intervals between the reinforced concrete purlins, and plain concrete bottom protection is adopted between the reinforced concrete supports to prevent impact.

3. The diversion open channel and temporary navigation structure suitable for soft soil foundation according to claim 1 is characterized by: The navigation anti-collision structure is arranged in front of the steel sheet pile wall.

4. The diversion open channel and temporary navigation structure suitable for soft soil foundation according to claim 1 or 3, characterized in that: The navigation anti-collision structure includes a first steel pipe, a second steel pipe, a third steel pipe, a channel steel purlin and an anti-collision tire. The first steel pipe is inserted into the concave surface of the steel sheet pile wall, the channel steel purlin is welded to the steel sheet pile wall, a hole is formed in the second steel pipe, the third steel pipe is inserted into the second steel pipe, and then welded to the first steel pipe to form a combined structure, and the anti-collision tire is hung on the third steel pipe.

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