Cofferdam structure based on double-row steel sheet piles

Abstract

The present invention discloses a cofferdam structure based on double-row steel sheet piles, which includes two rows of steel sheet piles, a support system and an accessory system. The support system includes a first tie rod and a sleeve. The two ends of the first tie rod respectively penetrate through the two rows of steel sheet piles, and the sleeve is sleeved on the first tie rod. The accessory system includes two first outer waist beams and two inner waist beams. The two first outer waist beams are installed at the two ends of the first tie rod, and the two first outer waist beams respectively abut against the opposite sides of the two rows of steel sheet piles. The two inner waist beams are installed at the two ends of the first tie rod, and the two inner waist beams respectively abut against the opposite sides of the two rows of steel sheet piles. The sleeve is arranged between the two inner waist beams, and the two ends of the sleeve can abut against the two inner waist beams. According to the cofferdam structure based on double-row steel sheet piles of the present invention, it can bear tension, resist the displacement of the steel sheet piles to the outside, and can also bear pressure and resist the displacement of the steel sheet piles to the inside, and has the advantages of convenient and fast construction, simple structure and repeated utilization.

Description

Technical Field

[0001] The present invention relates to the field of water conservancy project construction, and particularly relates to a cofferdam structure based on double-row steel sheet piles. Background Art

[0002] With the development of technology, the speed of engineering construction is getting faster and faster. In coastal areas with complex geological and hydrological conditions and deep soft soil layers, when the water level depth is relatively high, the traditional double-row Larssen steel sheet piles plus steel bar tie rods are generally used for cofferdam design to resist the unbalanced forces on both sides. The steel bar tie rods have the characteristics of convenient, fast, safe and stable construction. The steel bar tie rods are generally made of steel bars with a diameter of 16-70 mm, and the two ends are fixed by I-beams or angle steels, nuts, washers and spring washers. The steel bar tie rods are used to resist the outward displacement of the steel sheet piles. It is an indispensable part of the double-row Larssen steel sheet pile support.

[0003] For coastal areas with poor geological conditions and deep silt layers, through finite element analysis, it is found that the first tie rod will generate pressure, and at the same time, there is a situation where the double-row Larssen steel sheet piles displace inward. However, the traditional steel bar tie rods can only bear tension and resist the outward displacement of the double-row Larssen steel sheet piles, but cannot bear pressure and resist the situation where the double-row Larssen steel sheet piles displace inward at the same time. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a cofferdam structure based on double-row steel sheet piles, which can not only bear tension and resist the outward displacement of the steel sheet piles, but also bear pressure and resist the inward displacement of the steel sheet piles, and has the advantages of convenient and fast construction, simple structure and repeated utilization.

[0005] The cofferdam structure based on double-row steel sheet piles according to an embodiment of the present invention includes: two rows of steel sheet piles; a support system, the support system includes a first tie rod and a sleeve, and two ends of the first tie rod respectively penetrate through the two steel sheet piles; the sleeve is sleeved on the first tie rod; an accessory system, the accessory system includes two first outer waist beams and two inner waist beams, and the two first outer waist beams are installed at two ends of the first tie rod; the two first outer waist beams respectively abut against the opposite sides of the two rows of steel sheet piles; the two inner waist beams are installed at two ends of the first tie rod; the two inner waist beams respectively abut against the opposite sides of the two steel sheet piles; wherein, the sleeve is arranged between the two inner waist beams; two ends of the sleeve can abut against the two inner waist beams to resist the inward displacement of the steel sheet piles.

[0006] The cofferdam structure based on double-row steel sheet piles according to the embodiments of the present invention has at least the following technical effects: The two rows of steel sheet piles are connected by the first tie rod, and the first outer waist beam is arranged on the outer sides of the two rows of steel sheet piles, so that the first tie rod can bear the tensile force and resist the displacement of the steel sheet piles to the outside; at the same time, the inner waist beam is arranged between the two rows of steel sheet piles, and the casing in contact with the two inner waist beams is arranged, so that the casing pile can bear the pressure and resist the displacement of the steel sheet piles to the inside; By adopting the method of arranging the first outer waist beam, the inner waist beam and the casing on the first tie rod, it has the advantages of convenient and fast construction, simple structure and repeated utilization. Therefore, the cofferdam structure based on double-row steel sheet piles proposed by the present invention can not only bear the tensile force to resist the displacement of the steel sheet piles to the outside, but also bear the pressure to resist the displacement of the steel sheet piles to the inside, and has the advantages of convenient and fast construction, simple structure and repeated utilization.

[0007] According to some embodiments of the present invention, the casing is provided with a free end and a fixed end, and the free end and the fixed end are respectively arranged at opposite ends of the casing; the fixed end is fixedly connected to one of the inner waist beams; there is an activity gap between the free end and the other inner waist beam.

[0008] According to some embodiments of the present invention, the casing includes a steel pipe and two stiffening steel plates; the stiffening steel plates are of a hollow structure; the two stiffening steel plates are arranged at both ends of the steel pipe; the first tie rod penetrates through the steel pipe and the stiffening steel plates.

[0009] According to some embodiments of the present invention, the inner waist beam includes angle steel, and the angle steel is double-spliced unequal-angle steel; the first tie rod movably penetrates through the angle steel; the steel sheet pile and the casing are respectively arranged at symmetric ends of the angle steel.

[0010] According to some embodiments of the present invention, the accessory system includes two lifting bars, one end of the lifting bar is connected to the steel sheet pile, and the end far from the steel sheet pile is connected to the angle steel; the lifting bar, the angle steel and the steel sheet pile are sequentially connected to form a triangle.

[0011] According to some embodiments of the present invention, the first outer waist beam includes a channel steel and a nut; the first tie rod movably penetrates through the channel steel; the channel steel abuts against the steel sheet pile, the nut is installed on the first tie rod and is arranged at the end of the channel steel far from the steel sheet pile.

[0012] According to some embodiments of the present invention, the first outer waist beam includes a gasket and a spring coil; the gasket and the spring coil are installed on the first tie rod and are arranged between the channel steel and the nut.

[0013] According to some embodiments of the present invention, the support system includes a second tie rod, and the second tie rod is disposed below the first tie rod; both ends of the second tie rod penetrate through the two sheet piles respectively.

[0014] According to some embodiments of the present invention, the accessory system includes two second outer waist beams; the two second outer waist beams are installed at both ends of the second tie rod; the two second outer waist beams are respectively abutted against the opposite sides of the two sheet piles.

[0015] According to some embodiments of the present invention, the sheet piles are Larssen sheet piles. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 is a front view schematic diagram of the cofferdam structure based on double-row sheet piles according to an embodiment of the present invention;

[0018] Figure 2 is a top view schematic diagram of the cofferdam structure based on double-row sheet piles according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the free end of the casing of the cofferdam structure based on double-row sheet piles according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the fixed end of the casing of the cofferdam structure based on double-row sheet piles according to an embodiment of the present invention.

[0021] Reference Signs:

[0022] Cofferdam structure 100 based on double-row sheet piles,

[0023] Sheet pile 200,

[0024] Support system 300, first tie rod 310, casing 320, free end 321, fixed end 322, steel pipe 323, stiffening steel plate 324, second tie rod 330,

[0025] Accessory system 400, first outer waist beam 410, channel steel 411, nut 412, inner waist beam 420, hanger bar 430, second outer waist beam 440. Detailed Embodiments

[0026] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0027] In the description of the present invention, it should be understood that with respect to the orientation description, such as the up, down, front, back, left, right, etc. indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more. Understanding "greater than", "less than", "exceeding", etc. does not include the recited number, and understanding "above", "below", "within", etc. includes the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0030] Next, refer to Figures 1 to 4 to describe a cofferdam structure 100 based on double-row steel sheet piles according to an embodiment of the present invention.

[0031] As Figure 1 shown, a cofferdam structure 100 based on double-row steel sheet piles according to an embodiment of the present invention includes two rows of steel sheet piles 200, a support system 300, and an accessory system 400.

[0032] As Figure 1 and 2As shown, the support system 300 includes a first tie rod 310 and a casing 320. Both ends of the first tie rod 310 penetrate through two rows of sheet piles 200, and the casing 320 is sleeved on the first tie rod 310; the accessory system 400 includes two first outer waist beams 410 and two inner waist beams 420. The two first outer waist beams 410 are installed at both ends of the first tie rod 310, and the two first outer waist beams 410 are respectively abutted against the opposite sides of the two rows of sheet piles 200. The two inner waist beams 420 are installed at both ends of the first tie rod 310, and the two inner waist beams 420 are respectively abutted against the facing sides of the two rows of sheet piles 200. Among them, the casing 320 is arranged between the two inner waist beams 420; both ends of the casing 320 can be abutted against the two inner waist beams 420 to resist the inward displacement of the sheet piles 200.

[0033] The two rows of sheet piles 200 are vertically arranged and are respectively arranged at both ends of the first tie rod 310. The first tie rod 310 is a steel bar tie rod. Both ends of the first tie rod 310 penetrate through the two rows of sheet piles 200 and protrude outside the two rows of sheet piles 200. The two first outer waist beams 410 are installed on the first tie rod 310 and are arranged outside the two rows of sheet piles 200. When a sheet pile 200 tilts outward, it pushes the first outer waist beam 410 to move outward. The first outer waist beam 410 drives the first tie rod 310 to move. The first tie rod 310 pushes the other first outer waist beam 410 to move. When the other first outer waist beam 410 moves towards the other sheet pile 200, the other sheet pile 200 exerts a reaction force on the other first outer waist beam 410, so that the opposite sheet pile 200 cannot easily tilt outward. Through the action of the two first outer waist beams 410 and the first tie rod 310, the two first tie rods 310 can bear tensile force and can resist the outward displacement of the sheet piles 200.

[0034] The two inner waist beams 420 are installed on the first tie rod 310 and are abutted against the inner sides of the two rows of sheet piles 200. The casing 320 is sleeved on the outer surface of the first tie rod 310 and is arranged between the two inner waist beams 420. When a sheet pile 200 tilts inward, the sheet pile 200 pushes the inner waist beam 420 to move. The inner waist beam 420 pushes the casing 320 to move. The casing 320 pushes the other inner waist beam 420 to move. The other inner waist beam 420 moves towards the other sheet pile 200. At this time, the other sheet pile 200 exerts a reaction force on the other inner waist beam 420, so that the opposite sheet pile 200 cannot easily tilt inward. Through the action of the two inner waist beams 420 and the casing 320, the casing 320 can bear pressure and can resist the inward displacement of the sheet piles 200.

[0035] The cofferdam structure 100 based on double-row steel sheet piles according to the embodiments of the present invention, the two rows of steel sheet piles 200 are connected by the first tie rod 310, and the first outer waist beam 410 is arranged on the outer sides of the two rows of steel sheet piles 200, so that the first tie rod 310 can bear the tension and can resist the displacement of the steel sheet piles 200 to the outside; at the same time, the inner waist beam 420 is arranged between the two rows of steel sheet piles 200, and the casing 320 abutted against the two inner waist beams 420, so that the casing 320 can bear the pressure and can resist the displacement of the steel sheet piles 200 to the inside; by adopting the method of arranging the first outer waist beam 410, the inner waist beam 420 and the casing 320 on the first tie rod 310, it has the advantages of convenient and fast construction, simple structure and reusable. Therefore, the cofferdam structure 100 based on double-row steel sheet piles proposed by the present invention can not only bear the tension to resist the displacement of the steel sheet piles 200 to the outside, but also bear the pressure to resist the displacement of the steel sheet piles 200 to the inside, and has the advantages of convenient and fast construction, simple structure and reusable.

[0036] According to some embodiments of the present invention, as Figure 3 and 4 shown, the casing 320 is provided with a free end 321 and a fixed end 322, the free end 321 and the fixed end 322 are respectively arranged at the opposite ends of the casing 320; the fixed end 322 is fixedly connected with one of the inner waist beams 420; there is an activity gap between the free end 321 and the other inner waist beam 420. The fixed end 322 of the casing 320 is welded to the inner waist beam 420, and a little distance is reserved between the free end 321 of the casing 320 and the inner waist beam 420, so that the ability of the two rows of steel sheet piles 200 to bear the pressure is stronger.

[0037] According to some embodiments of the present invention, as Figure 1 shown, the casing 320 includes a steel pipe 323 and two stiffened steel plates 324, the stiffened steel plates 324 are of a hollow structure, the two stiffened steel plates 324 are arranged at both ends of the steel pipe 323, and the first tie rod 310 penetrates through the steel pipe 323 and the stiffened steel plates 324. By adopting the steel pipe 323 and adding the stiffened steel plates 324 at both ends of the steel pipe 323, the rigidity of the casing 320 is improved, so that the ability of the two rows of steel sheet piles 200 to bear the pressure is stronger.

[0038] According to some embodiments of the present invention, as Figure 1 shown, the inner waist beam 420 includes angle steel, the angle steel is double-spliced unequal-leg angle steel, the first tie rod 310 is movably penetrated through the angle steel, and the steel sheet piles 200 and the casing 320 are respectively arranged at the symmetric ends of the angle steel. By adopting double-spliced unequal-leg angle steel, the structure is simple and the installation is convenient.

[0039] According to some embodiments of the present invention, as Figure 1As shown, the accessory system 400 includes two suspension bars 430. One end of each suspension bar 430 is connected to the steel sheet pile 200, and the other end away from the steel sheet pile 200 is connected to an angle steel. The suspension bars 430, the angle steel, and the steel sheet pile 200 are sequentially connected to form a triangle. One end of the suspension bar 430 is welded to the steel sheet pile 200, and the other end is welded to the angle steel, forming a triangular structure with high stability, which can improve the rigidity and stability of the inner waist beam 420.

[0040] According to some embodiments of the present invention, as Figure 1 shown, the first outer waist beam 410 includes a channel steel 411 and a nut 412. The first tie rod 310 is movably passed through the channel steel 411. The channel steel 411 abuts against the steel sheet pile 200. The nut 412 is installed on the first tie rod 310 and is disposed at the end of the channel steel 411 away from the steel sheet pile 200. The channel steel 411 is welded to the steel sheet pile 200 and fixed to the first tie rod 310 by the nut 412, which is convenient for adjusting the position of the first outer waist beam 410, facilitating construction, being convenient for disassembly, and being conducive to reuse.

[0041] According to some embodiments of the present invention, the first outer waist beam 410 includes a gasket and a spring coil. The gasket and the spring coil are installed on the first tie rod 310 and are disposed between the channel steel 411 and the nut 412. By adding the gasket and the spring coil, the structural stability can be improved.

[0042] According to some embodiments of the present invention, as Figure 1 shown, the support system 300 includes a second tie rod 330. The second tie rod 330 is disposed below the first tie rod 310. Both ends of the second tie rod 330 respectively pass through two rows of steel sheet piles 200. By adding the second tie rod 330 and disposing the second tie rod 330 below the first tie rod 310, and installing the second tie rod 330 first to fix the positions of the two rows of steel sheet piles 200, in the case of a relatively high cofferdam height, the displacement of the steel sheet piles 200 to the outside can be more effectively controlled, and the construction is also more convenient and fast.

[0043] According to some embodiments of the present invention, as Figure 1 shown, the accessory system 400 includes two second outer waist beams 440. The two second outer waist beams 440 are installed at both ends of the second tie rod 330. The two second outer waist beams 440 respectively abut against the opposite sides of the two rows of steel sheet piles 200. By the two second outer waist beams 440, the positions of the two rows of steel sheet piles 200 are further fixed, making the construction more convenient and fast.

[0044] According to some embodiments of the present invention, as Figure 2 shown, the steel sheet pile 200 is a Larssen steel sheet pile 200. The Larssen steel sheet pile 200 has the characteristics of simple construction and fast construction speed.

[0045] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cofferdam structure based on double-row steel sheet piles, characterized in that, Including: Two rows of steel sheet piles; A support system, the support system includes a first tie rod and a casing, both ends of the first tie rod penetrate through the two rows of steel sheet piles respectively; the casing is sleeved on the first tie rod; An accessory system, the accessory system includes two first outer waling beams and two inner waling beams, the two first outer waling beams are installed at both ends of the first tie rod; the two first outer waling beams are respectively abutted against the opposite sides of the two steel sheet piles; the two inner waling beams are installed at both ends of the first tie rod; the two inner waling beams are respectively abutted against the opposite sides of the two steel sheet piles; Wherein, the casing is arranged between the two inner waling beams; both ends of the casing can be abutted against the two inner waling beams to resist the inward displacement of the steel sheet piles.

2. The cofferdam structure based on double-row steel sheet piles according to claim 1, wherein The casing is provided with a free end and a fixed end, the free end and the fixed end are respectively arranged at opposite ends of the casing; the fixed end is fixedly connected with one of the inner waling beams; there is a movable gap between the free end and the other inner waling beam.

3. The cofferdam structure based on double-row steel sheet piles according to claim 1, characterized in that, The casing includes a steel pipe and two stiffened steel plates; the stiffened steel plates are of a hollow structure; the two stiffened steel plates are arranged at both ends of the steel pipe; the first tie rod penetrates through the steel pipe and the stiffened steel plates.

4. The cofferdam structure based on double-row steel sheet piles according to claim 1, wherein, The inner waling beam includes an angle steel, the angle steel is a double-equal unequal-angle steel; the first tie rod movably penetrates through the angle steel; the steel sheet pile and the casing are respectively arranged at symmetric ends of the angle steel.

5. The cofferdam structure based on double-row steel sheet piles according to claim 4, characterized in that, The accessory system includes two suspender bars, one end of each suspender bar is connected with the steel sheet pile, and the end far from the steel sheet pile is connected with the angle steel; the suspender bar, the angle steel and the steel sheet pile are sequentially connected to form a triangle.

6. The cofferdam structure based on double-row steel sheet piles according to claim 1, characterized in that, The first outer waling beam includes a channel steel and a nut; the first tie rod movably penetrates through the channel steel; the channel steel is abutted against the steel sheet pile, the nut is installed on the first tie rod and is arranged at the end of the channel steel far from the steel sheet pile.

7. The cofferdam structure based on double-row steel sheet piles according to claim 6, characterized in that, The first outer waling beam includes a gasket and a spring coil; the gasket and the spring coil are installed on the first tie rod and are arranged between the channel steel and the nut.

8. The cofferdam structure based on double-row steel sheet piles according to claim 1, characterized in that, The support system includes a second tie rod; the second tie rod is arranged below the first tie rod; both ends of the second tie rod penetrate through the two steel sheet piles respectively.

9. The cofferdam structure based on double-row steel sheet piles according to claim 8, characterized in that, The accessory system includes two second outer waling beams; the two second outer waling beams are installed at both ends of the second tie rod; the two second outer waling beams are respectively abutted against the opposite sides of the two steel sheet piles.

10. The cofferdam structure based on double-row steel sheet piles according to claim 1, characterized in that, The steel sheet pile is a Larssen steel sheet pile.

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