CN211849521U

CN211849521U - Deep-buried underwater bearing platform steel sheet pile cofferdam

Info

Publication number: CN211849521U
Application number: CN202020013985.2U
Authority: CN
Inventors: 王新泉; 刁红国; 韩尚宇
Original assignee: Zhejiang University City College ZUCC
Current assignee: Zhejiang University City College ZUCC
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-11-03
Anticipated expiration: 2030-01-03

Abstract

The utility model relates to a deep-buried underwater bearing platform steel sheet pile cofferdam, which comprises a steel sheet pile cofferdam, a guide steel sheet pile, a column bottom hoop, a pile side control body, a pile side cable, an overhanging supporting beam and a profile steel supporting body; two sides of the guide steel sheet pile are respectively provided with a platform support column and a built-in support pier; a column bottom supporting plate and a column bottom hoop are arranged at the joint of the platform supporting column and the foundation soil body, and a hoop side inclined strut is arranged between the column bottom supporting plate and the column bottom hoop; a construction platform plate is arranged at the top end of the platform support column, and a platform support plate vertically welded with the construction platform plate is arranged on the construction platform plate; lateral supporting bodies are arranged on the platform supporting plate and the built-in supporting piers respectively in the direction facing the guide steel sheet pile; the transverse position of the guide steel sheet pile is limited by the lateral supports on both sides thereof. The utility model has the advantages that: the utility model discloses all set up stake side accuse body on the both sides face of direction steel sheet pile, can inject the transverse position of rearmounted steel sheet pile with the help of the direction crossbeam that inserts in the crossbeam spread groove.

Description

Deep-buried underwater bearing platform steel sheet pile cofferdam

Technical Field

The utility model relates to a can improve steel sheet pile direction and beat the degree of accuracy of establishing, reduce and beat the bearing performance of establishing the construction degree of difficulty, improving steel sheet pile cofferdam, promote the deep-buried underwater cushion cap steel sheet pile cofferdam of the quality of leaking stoppage construction belongs to the bridge engineering field.

Background

Compared with an earth-rock square cofferdam, the steel sheet pile cofferdam has the advantages of high strength, high construction speed and the like, and is an important water retaining structure for underwater bearing platform construction. When the steel sheet pile is constructed, the driving quality of the steel sheet pile, how to effectively improve the stability of the steel sheet pile cofferdam, the construction efficiency and reliability of improving the gap leakage stoppage of the steel sheet pile cofferdam and the like are the key points and difficulties of engineering construction control.

The underwater rock-socketed steel sheet pile cofferdam structure comprises an annular cofferdam formed by a plurality of steel sheet piles and an inner support arranged on the inner side of the annular cofferdam, and the lower part of the annular cofferdam is fixed in a rock-socketed groove through concrete. The utility model discloses a rig is after cutting the rock-socketed groove on the basement rock stratum, pour the concrete to the rock-socketed groove space of the inside and outside of annular cofferdam through the hopper arrangement in step to fixedly install the lower part of annular cofferdam in the rock-socketed groove, effectively solved the steel sheet pile insert under rock layer geological conditions beat the problem that the degree of difficulty is big, improved the scour protection ability of steel sheet pile cofferdam simultaneously; the construction method adopts a non-blasting construction method to construct, effectively reduces the safety risk, has little influence on the water environment and the geological environment around the proposed bearing platform, and simultaneously reduces the disturbance and the damage to the foundation rock stratum. But the structure has the further improvement in the aspects of improving the stability of the steel sheet pile cofferdam, improving the construction efficiency and reliability of the gap leakage stoppage of the steel sheet pile cofferdam and the like.

In view of this, in order to improve the construction quality and efficiency of the steel sheet pile cofferdam, the invention of the deeply buried underwater pile cap steel sheet pile cofferdam which can improve the accuracy of the guiding construction of the steel sheet pile, reduce the construction difficulty of the construction, improve the stress performance of the steel sheet pile cofferdam and improve the quality of the leakage blocking construction is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the prior art, providing one kind not only can improve the steel sheet pile direction and beat the degree of accuracy of establishing, can reduce moreover and beat and establish the construction degree of difficulty, can also improve steel sheet pile cofferdam the atress performance, promote the deep-buried underwater pile cap steel sheet pile cofferdam of leaking stoppage construction quality.

The steel sheet pile cofferdam for the deep-buried underwater bearing platform comprises a steel sheet pile cofferdam, a guide steel sheet pile, a column bottom hoop, a pile side control body, a pile side stay cable, an overhanging supporting beam and a profile steel supporting body;

two sides of the guide steel sheet pile are respectively provided with a platform support column and a built-in support pier; a column bottom supporting plate and a column bottom hoop are arranged at the joint of the platform supporting column and the foundation soil body, and a hoop side inclined strut is arranged between the column bottom supporting plate and the column bottom hoop; a construction platform plate is arranged at the top end of the platform support column, and a platform support plate vertically welded with the construction platform plate is arranged on the construction platform plate; lateral supporting bodies are arranged on the platform supporting plate and the built-in supporting piers respectively in the direction facing the guide steel sheet pile; the transverse position of the guide steel sheet pile is limited by lateral supporting bodies on two sides of the guide steel sheet pile; 3-5 guide steel sheet piles are inserted; 2-3 pile side control bodies are respectively arranged on two outer side walls of the guide steel sheet pile; the guide cross beam is inserted into the cross beam connecting groove, and the transverse position of the guide cross beam is controlled by the cross beam position correcting bolt; the transverse position of the rear steel sheet pile is limited by a guide cross beam;

an upper inner supporting plate, a lower inner supporting plate and a bottom inner supporting plate are sequentially arranged on the inner side wall of the steel sheet pile cofferdam from top to bottom, rotary press plates are arranged on the upper surfaces of the upper inner supporting plate, the lower inner supporting plate and the bottom inner supporting plate respectively, and the rotary press plates are rotatably hinged with the upper inner supporting plate, the lower inner supporting plate and the bottom inner supporting plate through the press plates; the upper surfaces of the upper inner supporting plate, the lower inner supporting plate and the bottom inner supporting plate are respectively provided with an upper inner support, a lower inner support and a bottom inner support, and the positions of the upper inner support, the lower inner support and the bottom inner support are limited by inner support extrusion bolts; the outer side wall of the steel sheet pile cofferdam is provided with a stay cable anchor plate, the top end of a pile side stay cable is connected with the stay cable anchor plate, and the bottom end of the pile side stay cable is connected with the ballast pier body; pier body anchor bars are punched into the foundation soil body from the self-pressing weight pier bodies;

a pile top hanging cap is arranged at the top end of the steel sheet pile cofferdam at the position with water leakage; two parallel overhanging supporting beams are arranged on the pile top hanging cap, the lower surfaces of the overhanging supporting beams are vertically welded and connected with the bag supporting beams, and bag stiffening ribs are arranged between the two bag supporting beams; the bottom end of the bag supporting beam is provided with a bottom pressing plate connected with the upper surface of the foundation soil body; the bottom pressing plate is firmly connected with the foundation soil body through the pressing plate anchor bars; a closed bag is stuck on the inner side of the bag stiffening rib, and an interface bonding layer is arranged at the joint of the closed bag and the steel sheet pile cofferdam; a bag filling body is injected into the closed bag through a filling body pressure pipe at the top end, and the closed bag is tightly attached to the steel sheet pile cofferdam;

a section steel supporting body is arranged on the inner side of the steel sheet pile cofferdam in a driving mode, and a supporting limiting plate which is vertically connected with the section steel supporting body is arranged on the section steel supporting body; the upper surface of the supporting limit plate is provided with a heaped loading weight body or a water storage tank; when the stacking load weight body is arranged, the position of the stacking load weight body is limited by the stacking limit rib, and the top surface of the stacking load weight body is provided with the limit rib fastening bolt; when the water storage tank is arranged, water is filled in the water storage tank.

Preferably, the method comprises the following steps: the steel sheet pile cofferdam comprises a guide steel sheet pile and a rear steel sheet pile, and the guide steel sheet pile and the rear steel sheet pile are made of the same material and have the same section shape.

Preferably, the method comprises the following steps: the column bottom hoop comprises two hoop plates with the same cross section, a hoop ear plate is arranged at the joint of the two hoop plates, and the column bottom hoop and the platform support column are firmly connected through a hoop fastening bolt; the plane of the column bottom supporting plate is in a fan shape and is vertically welded and connected with the hoop plate of the hoop; the lateral support body comprises a support adjusting bolt and a support side plate; the support adjusting bolt comprises a screw rod and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite.

Preferably, the method comprises the following steps: the pile side control body is formed by rolling a steel plate, a cross beam connecting groove is formed in the pile side control body, and the pile side control body is connected with the guide steel plate pile in a welding mode or connected through a bolt.

Preferably, the method comprises the following steps: the pile side stay cable adopts a steel strand, and the top end of the pile side stay cable penetrates through a stay cable anchor plate and is fastened through an anchorage device and a clamping piece; the ballast pier body is prefabricated by reinforced concrete materials, has a trapezoidal cross section and is connected with the anti-slip slope on the upper surface of the foundation soil body; the anti-slip slope inclines in the direction departing from the steel sheet pile cofferdam, and the slope gradient is 10-30 degrees; the pier body anchor bars are soil nails or steel pipes or profile steel.

Preferably, the method comprises the following steps: the cantilever supporting beam is formed by rolling profile steel and is vertically welded with the pile top hanging cap; the closed bag is formed by sewing geomembranes, the cross section of the closed bag is rectangular, and the closed bag is arranged on the inner side or the outer side or two sides of the steel sheet pile cofferdam; the interface bonding layer is made of waterproof double-sided adhesive tape and is annularly distributed along the periphery of the closed bag; the bag filling body is made of water or light concrete.

Preferably, the method comprises the following steps: the steel section supporting body is formed by rolling section steel, the section steel supporting body is arranged on the inner side of the steel sheet pile cofferdam, a supporting limiting plate is arranged at the connecting part of the section steel supporting body and a foundation soil body, and the section steel supporting body is arranged to a depth of 0.5-3 m below the elevation of the bottom surface of the steel sheet pile cofferdam; the stacking load weight body is prefabricated by concrete, and holes connected with the stacking load limiting ribs are formed in the stacking load weight body; the stacking limiting rib is vertically welded with the supporting limiting plate.

The utility model has the advantages that:

(1) the utility model is provided with the column bottom hoop and the column bottom supporting plate at the joint of the platform supporting column and the foundation soil body, which can reduce the influence of the vertical load of the platform supporting column on the foundation soil body; and simultaneously, the utility model discloses set up the side direction supporter respectively in the both sides of direction steel sheet pile, can realize that direction steel sheet pile beats and establishes the direction control of in-process, improved beating of direction steel sheet pile and established the quality.

(2) The utility model discloses all set up stake side accuse body on the both sides face of direction steel sheet pile, can inject the transverse position of rearmounted steel sheet pile with the help of the direction crossbeam that inserts in the crossbeam spread groove.

(3) The utility model can limit the upper layer inner support, the lower layer inner support and the bottom layer inner support as well as the upper layer inner supporting plate, the lower layer inner supporting plate and the bottom layer inner supporting plate through the inner support extrusion bolt, thereby reducing the difficulty of the arrangement of the upper layer inner support, the lower layer inner support and the bottom layer inner support; and simultaneously, the utility model discloses the stake side cable has been set up in the outside of steel sheet pile cofferdam to exert side direction pulling force to stake side cable through the heavyweight pier body and pier body anchor bar, improved steel sheet pile cofferdam's stability.

(4) The utility model discloses there is the position setting of leaking and steel sheet pile cofferdam lateral wall sealing bag to the accessible bag props roof beam and bag stiffening rib provides horizontal holding power to sealing the bag, can promote steel sheet pile cofferdam gap leaking stoppage's efficiency of construction and reliability by a wide margin.

(5) The utility model discloses beat in the inboard of the steel sheet pile cofferdam that influences the cushion cap construction under water and establish the shaped steel supporter to the upper surface setting that supports the limiting plate piles and carries ballast body or water storage box, can realize the horizontal reinforcement in steel sheet pile cofferdam, improves the atress performance in steel sheet pile cofferdam.

Drawings

FIG. 1 is a schematic view of the guiding inserting construction structure of the guiding steel sheet pile of the present invention;

FIG. 2 is a schematic view of a connection structure between the hoop at the bottom of the column and the supporting column of the platform in FIG. 1;

FIG. 3 is a schematic diagram of the rear steel sheet pile spacing insertion vertical surface of the present invention;

FIG. 4 is a schematic cross-sectional view of the rear steel sheet pile of FIG. 3 for limiting insertion;

FIG. 5 is a schematic view of the structure for enhancing the stability of the steel sheet pile cofferdam of the present invention;

FIG. 6 is a schematic view of the gap plugging vertical surface of the steel sheet pile cofferdam of the utility model;

FIG. 7 is a vertical sectional view of the steel sheet pile cofferdam of FIG. 6 for gap plugging;

FIG. 8 is a schematic cross-sectional view of the steel sheet pile cofferdam of FIG. 6 for gap plugging;

FIG. 9 is a schematic view of the combined support-changing structure of the section steel support body and the stacking and loading weight body of the present invention;

FIG. 10 is a schematic view of the combined support structure of the section steel support and the water storage tank of the present invention.

Description of reference numerals: 1-steel sheet pile cofferdam; 2, guiding the steel sheet piles; 3-a platform support column; 4, internally arranging a support pier; 5-foundation soil mass; 6-column bottom supporting plate; 7-column bottom hoop; 8-hoop side diagonal bracing; 9-constructing a platform plate; 10-a platform supporting plate; 11-lateral support; 12-post-placing steel sheet piles; 13-pile side control body; 14-a guiding beam; 15-beam connecting grooves; 16-beam position correction bolts; 17-upper inner supporting plate; 18-lower inner supporting plate; 19-bottom layer inner supporting plate; 20-rotating the pressing plate; 21-pressing plate rotating hinge; 22-upper internal support; 23-lower internal support; 24-a bottom layer inner support; 25-internal bracing extrusion bolt; 26-a guy cable anchor plate; 27-pile side stay; 28-pressing the heavy pier body; 29-pier body anchor bars; 30-hanging a cap on the top of the pile; 31-cantilever supporting beam; 32-capsular bag bracing; 33-bladder stiffeners; 34-a bottom platen; 35-pressing plate anchor bars; 36-closed pouch; 37-an interfacial bonding layer; 38-packing body crimp; 39-capsular bag obturator; 40-section steel support body; 41-supporting a limit plate; 42-stacking a ballast weight; 43-a water reservoir; 44-stacking limiting ribs; 45-limit rib fastening bolts; 46-a hoop plate; 47-hoop ear plates; 48-anchor ear fastening bolts; 49-support adjusting bolt; 50-supporting the side plates; 51-anti-skid ramp.

Detailed Description

The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Referring to fig. 1 to 10, in the deep-buried underwater pile cap steel sheet pile cofferdam, a platform support pillar 3 and a built-in support pier 4 are respectively arranged on two sides of a guide steel sheet pile 2; a column bottom supporting plate 6 and a column bottom hoop 7 are arranged at the joint of the platform supporting column 3 and the foundation soil body 5, and a hoop side inclined strut 8 is arranged between the column bottom supporting plate 6 and the column bottom hoop 7; a construction platform plate 9 is arranged at the top end of the platform support column 3, and a platform support plate 10 which is vertically welded and connected with the construction platform plate 9 is arranged on the construction platform plate 9; a lateral support body 11 is respectively arranged on the platform supporting plate 10 and the built-in supporting pier 4 in the direction of the guide steel sheet pile 2; hoisting the guide steel sheet pile 2 to a set pile position, limiting the transverse position of the guide steel sheet pile 2 through the lateral support bodies 11 on the two sides of the guide steel sheet pile, and inserting the guide steel sheet pile 2 into the set pile position by an external pile driver; the number of the inserted guide steel sheet piles 2 is 3-5; 2-3 pile side control bodies 13 are respectively arranged on two outer side walls of the guide steel sheet pile 2; inserting the guide beam 14 into the beam connecting groove 15, and controlling the transverse position of the guide beam 14 through a beam position-correcting bolt 16; when the rear steel sheet pile 12 is inserted, the transverse position of the rear steel sheet pile 12 is limited by the guide cross beam 14; an upper inner supporting plate 17, a lower inner supporting plate 18 and a bottom inner supporting plate 19 are sequentially arranged on the inner side wall of the steel sheet pile cofferdam 1 from top to bottom, rotary pressing plates 20 are respectively arranged on the upper surfaces of the upper inner supporting plate 17, the lower inner supporting plate 18 and the bottom inner supporting plate 19, and the rotary pressing plates 20 are connected with the upper inner supporting plate 17, the lower inner supporting plate 18 and the bottom inner supporting plate 19 through pressing plate rotary hinges 21; an upper inner support 22, a lower inner support 23 and a lower inner support 24 are respectively arranged on the upper surfaces of the upper inner support plate 17, the lower inner support plate 18 and the lower inner support plate 19, and the positions of the upper inner support 22, the lower inner support 23 and the lower inner support 24 are limited through inner support extrusion bolts 25; arranging a guy cable anchor plate 26 on the outer side wall of the steel sheet pile cofferdam 1, and connecting the top end of a pile side guy cable 27 with the guy cable anchor plate 26 and the bottom end with a ballast pier body 28; a pier body anchor bar 29 is arranged in the foundation soil body 5 from the weight-bearing pier body 28; finding out the position with water leakage in the steel sheet pile cofferdam 1 on site; a pile top hanging cap 30 is arranged at the top end of the steel sheet pile cofferdam 1 at the position with water leakage; two parallel overhanging support beams 31 are arranged on the pile top hanging cap 30, the lower surfaces of the overhanging support beams 31 are vertically welded and connected with the bag support beams 32, and bag stiffening ribs 33 are arranged between the two bag support beams 32; a bottom pressing plate 34 connected with the upper surface of the foundation soil body 5 is arranged at the bottom end of the bag supporting beam 32; after the transverse position of the bag supporting beam 32 is corrected, the bottom pressing plate 34 is firmly connected with the foundation soil body 5 through the pressing plate anchor bars 35; adhering a closed bag 36 to the inner side of the bag stiffening rib 33, and arranging an interface bonding layer 37 at the joint of the closed bag 36 and the steel sheet pile cofferdam 1; injecting a bag filling body 39 into the closed bag 36 through a filling body pressing pipe 38, so that the closed bag 36 is tightly attached to the steel sheet pile cofferdam 1; a section steel support body 40 is arranged on the inner side of the steel sheet pile cofferdam 1 in a driving mode, and a support limit plate 41 which is vertically connected with the section steel support body 40 is arranged on the section steel support body 40; the bottom-layer inner support 24 is cut off, and a stacking ballast 42 or a water storage tank 43 is arranged on the upper surface of the support limit plate 41; when the stacking load weight 42 is adopted, the position of the stacking load weight 42 is limited by the stacking limit rib 44, and the top surface of the stacking load weight 42 is provided with a limit rib fastening bolt 45; when the water storage tank 43 is used, water is filled into the water storage tank 43.

The steel sheet pile cofferdam 1 comprises a guide steel sheet pile 2 and a rear steel sheet pile 12; the guide steel sheet pile 2 and the postposition steel sheet pile 12 both adopt steel sheet piles with the specification of SKSP-SX 27.

TABLE 1 Steel sheet pile section parameter characteristic value table

The platform support column 3 is formed by rolling a steel pipe with the diameter of 200 mm.

The built-in support pier 4 is formed by rolling a steel pipe with the diameter of 200 mm.

The foundation soil body 5 is soft plastic mucky soil.

The plane of the column bottom supporting plate 6 is fan-shaped and is formed by rolling a steel plate with the thickness of 10mm, the central angle is 120 degrees, and the column bottom supporting plate is perpendicularly welded and connected with the hoop plate 46.

The column bottom hoop 7 comprises two hoop plates 46 with the same cross section, a hoop ear plate 47 is arranged at the joint of the two hoop plates 46, and the column bottom hoop 7 is firmly connected with the platform support column 3 through a hoop fastening bolt 48. The hoop plate 46 and the hoop ear plate 47 are both formed by rolling steel plates with the thickness of 10mm, the width of the hoop plate 46 is 10cm, and the length of the hoop ear plate 47 is 10 cm; the hoop fastening bolt 48 is composed of a high-strength screw rod with the diameter of 30mm and a bolt.

The hoop side inclined strut 8 is formed by welding steel pipe materials with the diameter of 60mm, and two ends of the hoop side inclined strut are respectively connected with the hoop plate 46 and the column bottom supporting plate 6 in a welding mode.

The construction platform plate 9 is formed by rolling a steel plate with the thickness of 20 mm.

The platform supporting plate 10 is formed by rolling a steel plate with the thickness of 20mm and is vertically welded and connected with the construction platform plate 9.

The lateral support body 11 comprises a support adjusting bolt 49 and a support side plate 50, wherein the support adjusting bolt 49 is formed by combining a high-strength screw rod with the diameter of 20mm and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite; the supporting side plate 50 is formed by rolling a steel plate with the thickness of 10 mm.

The pile side control body 13 is formed by rolling a steel plate with the thickness of 10mm, and is provided with a beam connecting groove 15 which is welded and connected with the guide steel sheet pile 2; the beam connecting groove 15 has a width of 120mm and a height of 220 mm.

The guide beam 14 is made of an H-shaped steel material having a specification of 200 × 100 × 5.5 × 8.

The beam position-correcting bolt 16 adopts a high-strength bolt with the diameter of 50 mm.

The upper inner supporting plate 17, the lower inner supporting plate 18 and the bottom inner supporting plate 19 are all formed by rolling steel plates with the thickness of 10mm, the cross sections of the steel plates are right-angled trapezoids, the width of the steel plates is 30cm, and the height of the steel plates is 30 cm.

The rotating pressing plate 20 is formed by rolling a steel plate with the thickness of 10mm, the width of the rotating pressing plate is 20cm, and the cross section of the rotating pressing plate is L-shaped.

The pressing plate rotating hinge 21 is a middle shaft hinge with a middle shaft diameter of 13mm and is connected with the rotating pressing plate 20 in a welding mode.

The upper layer inner support 22, the lower layer inner support 23 and the bottom layer inner support 24 all adopt H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12.

The inner support extrusion bolt 25 is formed by rolling a high-strength screw rod with the diameter of 30mm and is connected with the rotary pressing plate 20 through a screw.

The inhaul cable anchor plate 26 is formed by rolling a steel plate with the thickness of 20mm, and the plane size is 30cm multiplied by 15 cm.

The pile side inhaul cable 27 is made of a steel strand with the diameter of 15.2mm, and the top end of the steel strand penetrates through the inhaul cable anchor plate 26 and then is fastened with the clamping piece through an anchorage device.

The weight pier body 28 is prefabricated by reinforced concrete material and has a volume of 2m³The cross section of the steel sheet pile cofferdam is trapezoidal and is connected with an anti-slip slope 51 on the upper surface of the foundation soil body 5, and the anti-slip slope 51 inclines to the direction back to the steel sheet pile cofferdam 1 with the inclination of 20 degrees.

The pier body anchor bars 29 are steel pipes with the diameter of 100 mm.

The cantilever supporting beam 31 is formed by rolling a steel plate with the thickness of 10mm, has the width of 20cm, and is vertically welded and connected with the pile top hanging cap 30; the pile top hanging cap 30 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the pile top hanging cap is U-shaped, and the height of the pile top hanging cap is 20 cm.

The capsular stay 32 is made of H-shaped steel having a specification of 100 × 100 × 6 × 8.

The bag stiffeners 33 are rolled from a 2mm thick steel plate and 5cm wide.

The bottom pressing plate 34 is formed by rolling a steel plate with the thickness of 10 mm.

The press plate anchor bars 35 are threaded steel bars with the diameter of 32 mm.

The closed bag 36 is formed by sewing a geomembrane with the thickness of 1mm, has a rectangular cross section and is arranged on the outer side of the steel sheet pile cofferdam 1.

The interface bonding layer 37 is made of waterproof double-sided adhesive tape and is annularly adhered along the periphery of the closed bag 36.

The packing material pressing pipe 38 is a steel pipe having a diameter of 60 mm.

The pouch filler 39 is water.

The section steel support 40 is formed by rolling H-shaped steel with the specification of 450 multiplied by 200 multiplied by 9 multiplied by 14, is arranged at the inner side of the steel sheet pile cofferdam 1, is arranged at the depth of 2m below the elevation of the bottom surface of the steel sheet pile cofferdam 1, and is provided with a support limit plate 41 at the position connected with the foundation soil body 5. The supporting limit plate 41 is formed by rolling a steel plate with the thickness of 10 mm.

The stacking load-pressing body 42 is prefabricated by concrete, is rectangular in plane, 0.5m in width and 2m in length, and is provided with a hole connected with the stacking limit rib 44; the stacking limiting ribs 44 are steel pipes with the diameter of 50 mm.

The water storage tank 43 is formed by rolling iron sheet with the thickness of 0.2 mm.

The thread diameter of the limit rib fastening bolt 45 is matched with that of the stacking limit rib 44.

Claims

1. Deeply bury underwater cushion cap steel sheet pile cofferdam, its characterized in that: the steel sheet pile cofferdam comprises a steel sheet pile cofferdam (1), a guide steel sheet pile (2), a column bottom hoop (7), a pile side position control body (13), a pile side inhaul cable (27), a cantilever supporting beam (31) and a section steel supporting body (40);

two sides of the guide steel sheet pile (2) are respectively provided with a platform support column (3) and a built-in support pier (4); a column bottom supporting plate (6) and a column bottom hoop (7) are arranged at the joint of the platform supporting column (3) and the foundation soil body (5), and a hoop side inclined strut (8) is arranged between the column bottom supporting plate (6) and the column bottom hoop (7); a construction platform plate (9) is arranged at the top end of the platform support column (3), and a platform support plate (10) which is vertically welded and connected with the construction platform plate (9) is arranged on the construction platform plate; lateral supporting bodies (11) are respectively arranged on the platform supporting plate (10) and the built-in supporting pier (4) in the direction of the guide steel sheet pile (2); the transverse position of the guide steel sheet pile (2) is limited by lateral supporting bodies (11) on two sides of the guide steel sheet pile; 3-5 guide steel sheet piles (2) are inserted; 2-3 pile side control bodies (13) are respectively arranged on the two outer side walls of the guide steel sheet pile (2); the guide beam (14) is inserted into the beam connecting groove (15), and the transverse position of the guide beam (14) is controlled by a beam position-correcting bolt (16); the transverse position of the rear steel sheet pile (12) is limited by a guide cross beam (14);

an upper inner supporting plate (17), a lower inner supporting plate (18) and a bottom inner supporting plate (19) are sequentially arranged on the inner side wall of the steel sheet pile cofferdam (1) from top to bottom, rotating pressing plates (20) are respectively arranged on the upper surfaces of the upper inner supporting plate (17), the lower inner supporting plate (18) and the bottom inner supporting plate (19), and the rotating pressing plates (20) are connected with the upper inner supporting plate (17), the lower inner supporting plate (18) and the bottom inner supporting plate (19) through pressing plate rotating hinges (21); the upper surfaces of the upper inner supporting plate (17), the lower inner supporting plate (18) and the bottom inner supporting plate (19) are respectively provided with an upper inner support (22), a lower inner support (23) and a bottom inner support (24), and the positions of the upper inner support (22), the lower inner support (23) and the bottom inner support (24) are limited by inner support extrusion bolts (25); the outer side wall of the steel sheet pile cofferdam (1) is provided with a guy cable anchor plate (26), the top end of a pile side guy cable (27) is connected with the guy cable anchor plate (26), and the bottom end of the pile side guy cable (27) is connected with a ballast pier body (28); pier body anchor bars (29) are arranged in the foundation soil body (5) by self-pressing heavy pier bodies (28);

a pile top hanging cap (30) is arranged at the top end of the steel sheet pile cofferdam (1) at the position with water leakage; two parallel overhanging supporting beams (31) are arranged on the pile top hanging cap (30), the lower surfaces of the overhanging supporting beams (31) are vertically welded and connected with the bag supporting beams (32), and bag stiffening ribs (33) are arranged between the two bag supporting beams (32); the bottom end of the bag supporting beam (32) is provided with a bottom pressing plate (34) connected with the upper surface of the foundation soil body (5); the bottom pressing plate (34) is firmly connected with the foundation soil body (5) through a pressing plate anchor bar (35); a closed bag (36) is stuck to the inner side of the bag stiffening rib (33), and an interface bonding layer (37) is arranged at the joint of the closed bag (36) and the steel sheet pile cofferdam (1); a bag filling body (39) is injected into the closed bag (36) through a filling body pressing pipe (38) at the top end, and the closed bag (36) is tightly attached to the steel sheet pile cofferdam (1);

a section steel support body (40) is arranged on the inner side of the steel sheet pile cofferdam (1) in a driving mode, and a support limit plate (41) which is vertically connected with the section steel support body (40) is arranged on the section steel support body (40); the upper surface of the supporting limit plate (41) is provided with a stacking weight body (42) or a water storage tank (43); when the stacking load weight body (42) is arranged, the position of the stacking load weight body (42) is limited by the stacking limit rib (44), and the top surface of the stacking load weight body (42) is provided with a limit rib fastening bolt (45); when the water storage tank (43) is arranged, water is filled in the water storage tank (43).

2. The deep-buried underwater pile cap steel sheet cofferdam of claim 1, characterized in that: the steel sheet pile cofferdam (1) comprises a guide steel sheet pile (2) and a rear steel sheet pile (12), and the guide steel sheet pile (2) and the rear steel sheet pile (12) are made of the same material and have the same section shape.

3. The deep-buried underwater pile cap steel sheet cofferdam of claim 1, characterized in that: the column bottom hoop (7) comprises two hoop plates (46) with the same cross section, a hoop ear plate (47) is arranged at the joint of the two hoop plates (46), and the column bottom hoop (7) is firmly connected with the platform support column (3) through a hoop fastening bolt (48); the plane of the column bottom supporting plate (6) is fan-shaped and is vertically welded and connected with the hoop plate (46); the lateral support body (11) comprises a support adjusting bolt (49) and a support side plate (50); the support adjusting bolt (49) comprises a screw rod and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite.

4. The deep-buried underwater pile cap steel sheet cofferdam of claim 1, characterized in that: the pile side control body (13) is formed by rolling a steel plate, a cross beam connecting groove (15) is formed in the pile side control body, and the pile side control body (13) is connected with the guide steel plate pile (2) in a welding mode or connected through a bolt.

5. The deep-buried underwater pile cap steel sheet cofferdam of claim 1, characterized in that: the pile side stay cable (27) adopts a steel strand, and the top end of the pile side stay cable (27) penetrates through a stay cable anchor plate (26) and is fastened through an anchorage device and a clamping piece; the ballast pier body (28) is prefabricated by reinforced concrete materials, has a trapezoidal cross section and is connected with an anti-slip slope (51) on the upper surface of the foundation soil body (5); the anti-skid slope (51) inclines to the direction back to the steel sheet pile cofferdam, and the inclination of the slope is 10-30 degrees; the pier body anchor bars (29) are soil nails or steel pipes or section steel.

6. The deep-buried underwater pile cap steel sheet cofferdam of claim 1, characterized in that: the cantilever supporting beam (31) is formed by rolling profile steel and is vertically welded with the pile top hanging cap (30); the closed bag (36) is formed by sewing geomembranes, the cross section of the closed bag is rectangular, and the closed bag (36) is arranged on the inner side or the outer side or two sides of the steel sheet pile cofferdam (1); the interface bonding layer (37) is made of waterproof double-sided adhesive tape and is annularly distributed along the periphery of the closed bag (36); the bag filling body (39) is made of water or light concrete.

7. The deep-buried underwater pile cap steel sheet cofferdam of claim 1, characterized in that: the steel section supporting body (40) is formed by rolling steel sections, the steel section supporting body (40) is arranged on the inner side of the steel sheet pile cofferdam (1), a supporting limiting plate (41) is arranged at the connecting part of the steel section supporting body (40) and a foundation soil body (5), and the steel section supporting body (40) is arranged at the depth of 0.5-3 m below the elevation of the bottom surface of the steel sheet pile cofferdam (1); the stacking load weight body (42) is prefabricated by concrete, and holes connected with stacking limit ribs (44) are formed in the stacking load weight body; the stacking limiting rib (44) is vertically welded with the supporting limiting plate (41).