CN110924313B - Construction method of bridge foundation cofferdam - Google Patents
Construction method of bridge foundation cofferdam Download PDFInfo
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- CN110924313B CN110924313B CN201911355664.9A CN201911355664A CN110924313B CN 110924313 B CN110924313 B CN 110924313B CN 201911355664 A CN201911355664 A CN 201911355664A CN 110924313 B CN110924313 B CN 110924313B
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- pipe pile
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/08—Locking forms; Edge joints; Pile crossings; Branch pieces
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
Abstract
The invention relates to a bridge foundation cofferdam and a construction method, wherein a lacing wire supporting plate and a prestressed pull rod are arranged on the outer side wall of a steel pipe pile; the tubular lock catch is provided with a grouting bag, a bag filling body and a second airtight body, and can press down a bag pressing pipe through a pressing pipe screw and a hoop side pressure bearing plate; a side-plate airtight body and a first airtight body are arranged in the square lock catch, and a side-wall mortise and a side-plate tenon are arranged at the joint of the first catching groove side plate and the second catching groove side plate; a flat fastening bolt is arranged between the flat locking plate and the steel pipe pile, and a third airtight body and a guide inserting plate are arranged; controlling the position of the steel pipe pile through the lower-layer position-correcting bolt and the upper-layer position-correcting bolt; a cross brace connecting hoop and a hoop side connecting groove are arranged at the outer side cross brace or the inner side cross brace which are vertically connected; and an inner wall connecting plate is arranged in the steel pipe pile, and the inner wall connecting plate is pressed by an inner supporting pressure rod. The invention is beneficial to improving the integrity of the steel pipe pile cofferdam, reducing the field construction difficulty and improving the component layout quality.
Description
Technical Field
The invention relates to a bridge foundation cofferdam and a construction method thereof, which are beneficial to improving the integrity of a steel pipe pile cofferdam, reducing the field construction difficulty and improving the component layout quality, belong to the field of bridge engineering and are suitable for bridge deepwater cofferdam engineering.
Background
The bridge foundation is often in an environment with rapid water depth and extremely complex geological conditions. During the construction of the cofferdam structure, the engineering problems of the overall improvement of the cofferdam structure, the erection of a construction platform, the improvement of the seepage-proofing performance and the like are still to be improved.
In the prior art, a steel pipe pile cofferdam for a bridge foundation is provided, which relates to the technical field of cofferdam construction and comprises bottom sealing concrete, lock catch steel pipe piles and reinforced concrete piles; the lock catch steel pipe pile comprises a pile body and a lock catch arranged on the wall surface of the pile body, the lock catch steel pipe pile surrounds the edge of the bottom sealing concrete through the connection of the lock catch, and a pile head extending into the surface of the bedrock integrally extends from the lower end of the pile body; an inner support is further arranged in the lock catch steel pipe pile and comprises an H-shaped steel purlin and a support rod which is horizontally arranged between the lock catch steel pipe piles on the opposite side. Although the construction method can meet the driving and connection problems of the steel pipe pile cofferdam, the airtightness and integrity of the lock catch steel pipe part are difficult to guarantee, the pulling difficulty is large after concrete is poured into the lock catch, the steel pipe pile and the lock catch are damaged, and meanwhile, the problems of accurate guiding driving, integral tensioning and integrity improvement, hanging of a construction platform and the like of the steel pipe pile are difficult to solve.
In view of this, in order to improve the construction quality and integrity of the bridge foundation cofferdam, the invention of the bridge foundation cofferdam and the construction method which can reduce the supporting difficulty of the construction platform, improve the construction efficiency and improve the overall stability of the member is urgently needed.
Disclosure of Invention
The invention aims to provide a bridge foundation cofferdam and a construction method, which can not only improve the integrity of a steel pipe pile cofferdam, but also reduce the field construction difficulty and improve the component layout quality.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a construction method of a bridge foundation cofferdam comprises the following construction steps:
1) construction preparation: surveying and mapping to determine the plane position of the steel pipe pile, preparing materials and devices required by construction, and determining a site construction process;
2) processing the steel pipe pile and the connecting lock catch: rolling the steel pipe pile with the diameter and the length meeting the requirements according to the requirements, arranging 1-3 pile side connecting arc plates on the outer side wall of the steel pipe pile, and arranging two lacing wire supporting plates on each pile side connecting arc plate; a supporting plate reinforcing rib is arranged between two bracing supporting plates on the same pile side connecting arc plate; arranging a connecting lock catch at the joint of the steel pipe piles; the connecting lock catch is a tubular lock catch or a square lock catch or a flat plate lock catch;
3) the steel pipe pile is subjected to position correction and insertion: a platform bottom plate is arranged on foundation soil outside the pile position of the steel pipe pile, and the platform bottom plate is firmly connected with the foundation soil through bottom plate anchor bars; arranging a lower layer position correction supporting plate and a humanoid supporting column on the platform bottom plate, and arranging a supporting column top plate on the top end of the humanoid supporting column; arranging an upper-layer position correcting support plate on the side, facing the steel pipe pile, of the support column top plate; a lower layer position-correcting bolt and an upper layer position-correcting bolt are respectively arranged on the lower layer position-correcting support plate and the upper layer position-correcting support plate, and a position-correcting arc plate and an arc plate sealing layer are sequentially arranged on the upper layer position-correcting bolt facing the side of the steel pipe pile;
4) the outside stull sets up with inboard stull: the inner side transverse support (20) and the outer side transverse support (21) are respectively positioned at two sides of the steel pipe pile (1), and connecting pressing plates are arranged on the joint surfaces of the inner side transverse support and the outer side transverse support and the steel pipe pile according to the plane position of the steel pipe pile; the method comprises the following steps that a cross brace connecting hoop is arranged at the corner part of the steel pipe pile, a cross brace reinforcing beam is additionally arranged at the corner part of an inner side cross brace, one end of the cross brace reinforcing beam is connected with a cross brace hoop in a welding mode, and the other end of the cross brace reinforcing beam is connected with the cross brace hoop through a hoop connecting bolt; hoop side connecting ribs are arranged between the cross brace anchor ears and the steel pipe piles, and the hoop side connecting ribs are connected with the steel pipe piles through arc plate adjusting bolts and pile side arc plates; blowing and filling discrete materials to the bottom end of the steel pipe pile to form a pile filling body;
5) and (3) connection and reinforcement of the steel pipe pile: penetrating the prestressed pull rod through the lacing wire supporting plate, and applying a tensile force to the prestressed pull rod through the pull rod fastening bolt; for the tubular lock catch, a grouting bag filler is pressed into the grouting bag through an external grouting pipe, and a second closing body is pressed into the cavities of the T-shaped lock beam and the opening steel pipe through the closing grouting pipe; for the square lock catch, a first closing body is injected into a cavity formed by enclosing the first buckle slot side plate, the second buckle slot side plate and the side plate connecting plate through an external grouting pipe; for the flat plate lock catch, a third airtight body is injected in a cavity formed by enclosing the external grouting pipe, the guide inserting plate and the flat plate lock catch plate;
6) erecting a pile-supported construction platform: inserting the inner supporting pressure rod and the inner wall connecting plate into the steel pipe pile, arranging an inner supporting pressure plate at the top end of the inner supporting pressure rod, and arranging a rotating connecting rod between the inner supporting pressure rod and the inner wall connecting plate; a pile top pressing cap is arranged at the top end of the steel pipe pile, the pile top pressing cap and the inner supporting pressing plate are enabled to pass through a pressing plate adjusting bolt, and a top supporting connecting rib connected with a suspender top support is arranged on the upper surface of the pile top pressing cap; a suspender stay cable and a stay cable connecting bar are arranged between one side of the suspender top support and the outer side cross support, a platform suspender is arranged on the other side of the suspender top support, and a construction platform is arranged at the bottom end of the platform suspender; controlling the height of the construction platform through a suspender position control bolt at the top end of the platform suspender;
7) and (3) pouring bottom sealing concrete: and performing concrete pouring construction in a cofferdam formed by enclosing the steel pipe piles on the construction platform to form bottom sealing concrete.
Optionally, the tubular latch in step 2) includes an open steel tube and a T-shaped lock beam, and two sides of the T-shaped lock beam are both provided with a closed grouting tube; the slip vertical plate is stuck and connected with the grouting bag, and a bag bottom arc plate is arranged at the bottom of the slip vertical plate; the bag bottom arc plate is made of a steel plate, the plane of the bag bottom arc plate is semicircular or circular, the bag bottom arc plate is connected with the sliding vertical plate through a vertical plate connecting plate, a bag connecting rib is arranged between the bag bottom arc plate and the grouting bag, and a pressure pipe connecting bolt is arranged on the upper surface of the bag bottom arc plate; the bottom end of the bag pressing pipe is connected with a pressing pipe connecting bolt; inserting the inner support core plate into the steel pipe pile, and firmly connecting the arc-shaped pressing plate with the inner side wall of the steel pipe pile through a pressing plate positioning bolt on the outer side of the inner support core plate; the central angle of the arc-shaped pressing plate is 15-30 degrees, and the outer diameter of the arc-shaped pressing plate is the same as the inner diameter of the steel pipe pile; the upper surface of the inner support core plate is sequentially provided with a core plate connecting rod and a pile top connecting plate, the pile top connecting plate is connected with the top end of the steel pipe pile, the outer side of the inner support core plate is provided with a pressing plate positioning bolt, the inner wall of the steel pipe pile is provided with an arc-shaped pressing plate, and the arc-shaped pressing plates are positioned at two sides of the inner support core plate; the pile top connecting plate is a steel plate, and a platform plate connecting rod and a pressure pipe platform plate are sequentially arranged on the pile top connecting plate; a pressure pipe screw rod vertically welded and connected with the pressure pipe platform plate is arranged on the pressure pipe platform plate, and the pressure pipe screw rod is connected with a pressure pipe bolt after passing through the hoop side pressure bearing plate; a pressure pipe guide pipe is arranged at the joint of the pressure pipe platform plate and the bag pressure pipe; the hoop side pressure bearing plate and the bag pressure pipe are connected through a pressure pipe hoop.
Optionally, the square lock catch in step 2) includes a first buckle slot side plate and a second buckle slot side plate; the first catching groove side plate and the second catching groove side plate are both made of steel plates and are symmetrically arranged on two sides of the steel pipe pile, the number of the first catching groove side plate and the number of the second catching groove side plate are two, and side plate connecting plates are respectively arranged between the two first catching groove side plates and the two second catching groove side plates; set up the protruding falcon of curb plate towards second catching groove curb plate side at first catching groove curb plate, set up curb plate falcon groove on the second catching groove curb plate to set up the curb plate obturator between the protruding falcon of curb plate and curb plate falcon groove.
Optionally, the flat plate lock catch in step 2) includes two flat plate lock catch plates respectively arranged on the two steel pipe piles; arranging guide slots on two adjacent steel pipe piles respectively, arranging guide inserting plates in the guide slots, and connecting lock plate connecting hooks of two flat lock plate lock plates in a counter-pulling manner; the outer side wall of one steel pipe pile and the flat locking plate on the other steel pipe pile connected with the outer side wall of the steel pipe pile are respectively provided with a fastening bolt connector, and a flat fastening bolt is arranged between the opposite fastening bolt connectors; the flat plate locking plate is formed by rolling a steel plate, one end of the flat plate locking plate is welded with the steel pipe pile, the other end of the flat plate locking plate is provided with a locking plate connecting hook connected with the connected flat plate locking plate, and the end part of the locking plate connecting hook is provided with a locking inner sealing layer; the flat plate fastening bolt comprises a screw rod and a bolt and is arranged on the backwater side of the steel pipe pile cofferdam.
Optionally, the upper-layer position correcting support plate in the step 3) is formed by rolling a steel plate, the cross section of the upper-layer position correcting support plate is arc-shaped, the central angle of the upper-layer position correcting support plate is 180-270 degrees, and a lock catch penetrating opening is formed in the upper-layer position correcting support plate and connected with the upper-layer position correcting bolt through a screw; the upper-layer position correcting bolt and the position correcting arc plate are connected with the arc plate sealing layer in a sticking way through a position correcting bolt slot hole; the V-shaped support column is provided with a support column inner connecting plate facing the steel pipe pile side; the bracing column inner connecting plates are annularly arranged along the periphery of the steel pipe pile and are connected with the human-shaped bracing column in a welding mode.
Optionally, in the step 4), the connecting pressing plate is formed by rolling a steel plate, and the connecting surface of the connecting pressing plate and the steel pipe pile is arc-shaped; the transverse strut connecting hoop and the hoop side connecting groove are both formed by rolling steel plates, and one of the two outer transverse struts or the inner transverse strut which are vertically connected penetrates through the transverse strut connecting hoop, and the other one of the two outer transverse struts or the inner transverse strut is arranged on the hoop side connecting groove; the cross section of the cross-brace connecting hoop is rectangular, and the cross section of the hoop side connecting groove is U-shaped; the arc plate adjusting bolt is formed by combining three sections of screw rods and two bolts, the screw rods and the bolts are arranged at intervals, and the middle screw rod is vertically welded and connected with the hoop side connecting rib.
Optionally, in step 5), the bag filler is made of lightweight concrete or water or slurry; the first airtight body, the second airtight body and the third airtight body are made of self-compacting concrete or grouting materials.
Optionally, in step 6), the rotating connecting rods are steel pipes, two ends of each rotating connecting rod are connected with the inner supporting pressure rod and the inner wall connecting plate through connecting rod rotating hinges, and each inner wall connecting plate is connected with two rotating connecting rods; the cross section of the inner wall connecting plate is arc-shaped, the central angle is 45-60 degrees, and an elastic connecting rib is arranged between the two opposite inner wall connecting plates; the elastic connecting ribs adopt springs; the platform suspender is formed by rolling a steel pipe, and the top end of the platform suspender penetrates through the suspender shore and is connected with the suspender position control bolt through a screw.
The embodiment of the invention has the following beneficial effects:
1. according to the embodiment of the invention, the tie bar supporting plate and the prestressed pull rod are arranged on the outer side wall of the steel pipe pile, so that transverse fastening pulling force can be applied to the steel pipe pile, and the integrity of the steel pipe pile cofferdam is promoted.
2. According to the embodiment of the invention, the water retaining effect of the tubular lock catch is improved through the grouting bag, the bag filling body and the second airtight body, the top plate of the pressing pipe can be supported through the inner support core plate and the arc-shaped pressing plate, and the pressing load is provided for the bag pressing pipe through the pressing pipe screw rod and the hoop side pressure bearing plate, so that the laying quality of the grouting bag is improved.
3. According to the embodiment of the invention, the side wall mortises and the side plate convex tenons are arranged at the joints of the first catching groove side plates and the second catching groove side plates, so that the requirements of sliding and positioning control and transverse connection reinforcement of the steel pipe pile can be synchronously met, and the water retaining effect of the square-shaped catching buckle can be improved through the plate-side closing bodies and the first closing bodies.
4. According to the embodiment of the invention, the guide inserting plate is arranged between the adjacent steel pipe piles, so that the damage of steel pipe pile driving construction to the flat plate lock catch plate can be reduced; a flat fastening bolt is arranged between the flat locking plate and the opposite steel pipe pile and can be used for enhancing the tightness between the flat locking plates; set up the third obturator between direction picture peg and dull and stereotyped hasp board, set up hasp inner sealing layer at the tip of hasp board hookup, help promoting the manger plate effect of steel-pipe pile cofferdam.
5. According to one embodiment of the invention, the driving direction of the steel pipe pile is synchronously controlled through the lower-layer position-correcting bolt and the upper-layer position-correcting bolt on the lower-layer position-correcting support plate and the upper-layer position-correcting bolt on the upper-layer position-correcting support plate, the steel pipe pile can be temporarily locked, and the difficulty of guiding, position controlling and temporary lengthening of the steel pipe pile is reduced.
6. According to one embodiment of the invention, the arc-shaped connecting pressing plates are arranged on the joint surfaces of the inner side cross brace and the outer side cross brace with the steel pipe pile, so that the connecting strength of the inner side cross brace and the outer side cross brace with the steel pipe pile can be improved; the outer side cross brace or the inner side cross brace which are vertically connected are connected through the cross brace connecting hoop and the hoop side connecting groove, so that the laying difficulty of the outer side cross brace and the inner side cross brace can be effectively reduced; the arrangement of the hoop side connecting ribs and the pile side arc plates is beneficial to improving the stress performance of the cross brace reinforcing beam and the inner side cross brace.
7. According to one embodiment of the invention, the inner wall connecting plate is arranged in the steel pipe pile, and the inner wall connecting plate is applied with jacking pressure through the inner supporting and pressing rod jacking and rotating connecting rod, so that the stress of the pile top pressing cap is improved; meanwhile, the construction platform load is transmitted to the outer side cross brace by means of the suspender stay cable and the suspender top brace, so that the difficulty of building the construction platform is reduced.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a construction process of a bridge foundation cofferdam according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a cofferdam supporting structure according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a band side coupler slot in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of a tubular lock connection structure according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a grouting bag arrangement structure according to an embodiment of the present invention;
FIG. 6 is a schematic view of a square-shaped locking structure according to an embodiment of the present invention;
FIG. 7 is a schematic view of a locking structure of a flat plate according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a steel pipe pile position correction insertion structure according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an upper alignment supporting plate according to an embodiment of the present invention;
fig. 10 is a schematic structural view of a pile-supported construction platform according to an embodiment of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-steel pipe pile; 2, connecting an arc plate at the pile side; 3-stretching a rib supporting plate; 4-bracing plate reinforcing ribs; 5, connecting a lock catch; 6-tubular lock catch; 7-square lock catch; 8-flat plate locking; 9-foundation soil; 10-a platform floor; 11-baseplate anchor bars; 12-lower layer position correcting supporting plate; 13-a human-shaped support column; 14-a brace top plate; 15-upper layer position correcting supporting plate; 16-lower level position correcting bolt; 17-upper layer position correcting bolt; 18-aligning the arc plate; 19-arc plate sealing layer; 20-inner side cross brace; 21-outer side wale; 22-connecting the press plate; 23-cross brace anchor ear; 24-a wale reinforcing beam; 25-anchor ear connecting bolt; 26-hoop side tie bars; 27-arc plate adjusting bolt; 28-pile side arc plate; 29-pile internal filling body; 30-prestressed tension rods; 31-a tie rod fastening bolt; 32-capsular bag obturator; 33-a second obturator; 34-a first catching side plate; 35-a second catching side plate; 36-side plate connection plate; 37-a first obturator; 38-a guide insert plate; 39-flat latch plate; 40-a third obturator; 41-internal supporting and pressing rod; 42-inner wall connecting plate; 43-internal bracing pressure plate; 44-a rotating link; 45-pile top pressing cap; 46-a pressure plate adjusting bolt; 47-boom shore; 48-top bracing connecting ribs; 49-boom guy; 50-stay cable connecting rib; 51-a platform boom; 52-construction platform; 53-closed bottom concrete; 54-open steel pipe; a 55-T shaped lock beam; 56-sealing the grouting pipe; 57-slip riser; 58-grouting bag; 59-bag bottom arc plate; 60-vertical plate connecting plate; 61-capsular bag attachment ribs; 62-a pressure pipe connecting bolt; 63-pressing the tube by the capsular bag; 64-inner supporting core plate; 65-a pressure plate position adjusting bolt; 66-arc-shaped pressing plates; 67-core plate connecting rods; 68-pile top connecting plate; 69-platform plate link; 70-pressing a tube platform plate; 71-pressing a pipe screw; 72-hoop side bearing plate; 73-a crimp bolt; 74-a crimp tube guide; 75-pressing the pipe hoop; 76-side plate falcon; 77-side plate tongue and groove; 78-side plate obturator; 79-guide slot; 80-locking plate connecting hook; 81-fastening bolt connectors; 82-plate fastening bolts; 83-locking inner sealing layer; 84-the lock catch is arranged through the opening; 85-hoop side connecting grooves; 86-a position correction bolt slot; 87-pillar interconnectors; 88-connecting rod rotating hinge; 89-elastic connecting ribs; 90-a cross brace connecting hoop; 91-boom position control bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "open," "upper," "middle," "length," "inner," and the like are used in an orientation or positional relationship for convenience in describing the present invention and for simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Technical requirements of field hoisting construction, technical requirements of rolling and welding construction of the steel pipe pile, technical requirements of inserting construction of the steel pipe pile, technical requirements of bolt fastening construction, technical requirements of concrete pouring construction and the like are omitted, and the implementation mode of the method is mainly explained.
Referring to fig. 1 to 10, in the present embodiment, a method for constructing a bridge foundation cofferdam is provided, which includes the following construction steps:
1, preparation of construction: surveying and mapping to determine the plane position of the steel pipe pile 1, preparing materials and devices required by construction, and determining a site construction process;
2, processing of the steel pipe pile and the connecting lock catch: rolling a steel pipe pile 1 with the diameter and the length meeting the requirements according to the requirements, arranging 1-3 pile side connecting arc plates 2 on the outer side wall of the steel pipe pile 1, and arranging two tie bar supporting plates 3 on each pile side connecting arc plate 2; a supporting plate reinforcing rib 4 is arranged between two bracing plate 3 on the same pile side connecting arc plate 2; a connecting lock catch 5 is arranged at the joint of the steel pipe pile 1; the connecting lock catch 5 is a tubular lock catch 6, a square lock catch 7 or a flat lock catch 8;
3, steel pipe pile position correction insertion: a platform bottom plate 10 is arranged on foundation soil 9 outside the pile position of the steel pipe pile 1, and the platform bottom plate 10 is firmly connected with the foundation soil 9 through a bottom plate anchor bar 11; a lower layer position correction supporting plate 12 and a human-shaped supporting column 13 are arranged on the platform bottom plate 10, and a supporting column top plate 14 is arranged at the top end of the human-shaped supporting column 13; arranging an upper-layer position correction supporting plate 15 on the side, facing the steel pipe pile 1, of the supporting column top plate 14; a lower-layer position-correcting bolt 16 and an upper-layer position-correcting bolt 17 are respectively arranged on the lower-layer position-correcting support plate 12 and the upper-layer position-correcting support plate 15, and a position-correcting arc plate 18 and an arc plate sealing layer 19 are sequentially arranged on the upper-layer position-correcting bolt 17 facing the steel pipe pile 1;
4 the outer side cross brace and the inner side cross brace are arranged: according to the plane position of the steel pipe pile 1, connecting pressing plates 22 are arranged on the joint surfaces of the inner transverse support 20 and the outer transverse support 21 and the steel pipe pile 1; a cross brace connecting hoop 90 is arranged at the corner part of the steel pipe pile 1, and a cross brace reinforcing beam 24 is additionally arranged at the corner part of the inner cross brace 20, so that one end of the cross brace reinforcing beam 24 is connected with a cross brace hoop 23 in a welding manner, and the other end of the cross brace reinforcing beam is connected with the cross brace hoop 23 through a hoop connecting bolt 25; a hoop side connecting rib 26 is arranged between the cross brace hoop 23 and the steel pipe pile 1, and the hoop side connecting rib 26 is connected with the steel pipe pile 1 through an arc plate adjusting bolt 27 and a pile side arc plate 28; blowing and filling discrete materials to the bottom end of the steel pipe pile 1 to form a pile inner filling body 29;
5, steel pipe pile connection reinforcement: the prestressed pull rod 30 passes through the lacing wire supporting plate 3, and tensile force is applied to the prestressed pull rod 30 through the pull rod fastening bolt 31; for the tubular latch 6, the grouting bag filler 32 is pressed into the grouting bag 58 through the external grouting pipe, and the second closing body 33 is pressed into the cavity between the T-shaped lock beam 55 and the opening steel pipe 54 through the closing grouting pipe 56; for the square lock catch 7, a first closing body 37 is injected into a cavity formed by enclosing the first buckle slot side plate 34, the second buckle slot side plate 35 and the side plate connecting plate 36 through an external grouting pipe; for the flat lock catch 8, a third obturator 40 is injected into a cavity formed by the guide inserting plate 38 and the flat lock catch plate 39 through an external grouting pipe;
6, erecting a pile-supported construction platform: inserting the inner supporting compression bar 41 and the inner wall connecting plate 42 into the steel pipe pile 1, arranging an inner supporting compression plate 43 at the top end of the inner supporting compression bar 41, and arranging a rotating connecting rod 44 between the inner supporting compression bar 41 and the inner wall connecting plate 42; arranging a pile top pressing cap 45 at the top end of the steel pipe pile 1, enabling the pile top pressing cap 45 and the inner supporting pressing plate 43 to pass through a pressing plate adjusting bolt 46, and arranging a top support connecting rib 48 connected with a suspender top support 47 on the upper surface of the pile top pressing cap 45; a suspender stay 49 and a stay connecting bar 50 are arranged between one side of the suspender top support 47 and the outer side cross support 21, the other side is provided with a platform suspender 51, and the bottom end of the platform suspender 51 is provided with a construction platform 52; the height of the construction platform 52 is controlled by a boom positioning bolt 91 at the top end of the platform boom 51;
7, bottom sealing concrete pouring: concrete is poured into a cofferdam formed by enclosing the steel-pipe pile 1 on the construction platform 52 to form a back cover concrete 53.
Fig. 2 is a schematic diagram of a cofferdam supporting structure in fig. 1, fig. 3 is a schematic diagram of a cross section of a hoop side connecting groove in fig. 2, fig. 4 is a schematic diagram of a pipe type lock catch connecting structure in fig. 1, fig. 5 is a schematic diagram of a grouting bag arrangement construction structure in fig. 4, fig. 6 is a schematic diagram of a square lock catch connecting structure in fig. 1, fig. 7 is a schematic diagram of a flat plate lock catch connecting structure in fig. 1, fig. 8 is a schematic diagram of a steel pipe pile aligning and inserting structure in fig. 1, fig. 9 is a schematic diagram of an upper aligning support plate structure in fig. 8, and fig. 10 is a schematic diagram of a pile bearing type construction platform structure in fig. 1. Referring to fig. 2-10, in the bridge foundation cofferdam and the construction method, a tie bar supporting plate 3 and a prestressed pull rod 30 are arranged on the outer side wall of a steel pipe pile 1; the pipe-type lock catch 6 is provided with a grouting bag 58, a bag filling body 32 and a second closing body 33, and can provide a pressing load for a bag pressing pipe 63 through a pressing pipe screw 71 and a hoop side pressure bearing plate 72; a plate side closed body and a first closed body 37 are arranged in the square lock catch 7, and a side wall mortise and a side plate convex tenon 76 are arranged at the joint of the first catching groove side plate 34 and the second catching groove side plate 35; a flat fastening bolt 82 is arranged between the flat latch plate 39 and the opposite steel pipe pile 1, and a third closing body 40 and a guide inserting plate 38 are arranged; the position of the steel pipe pile 1 can be controlled through a lower-layer position-correcting bolt 16 and an upper-layer position-correcting bolt 17; the vertically connected outer side cross brace 21 or inner side cross brace 20 is connected through a cross brace connecting hoop 90 and a hoop side connecting groove 85; an inner wall connecting plate 42 is provided inside the steel pipe pile 1, and a pressing force is applied to the inner wall connecting plate 42 through an inner bracing rod 41.
In this embodiment:
the steel pipe pile 1 is made of a steel pipe with the diameter of 800mm and the wall thickness of 10 mm.
The pile side connecting arc plate 2 is formed by rolling a steel plate with the thickness of 10mm, has the same inner diameter as the outer diameter of the steel pipe pile 1, and is connected with the steel pipe pile 1 in a welding mode.
The lacing wire bracing plate 3 is formed by rolling a steel plate with the thickness of 20mm and is welded with the outer side wall of the pile side connecting arc plate 2.
The supporting plate reinforcing ribs 4 are steel pipes with the diameter of 100mm, and two ends of the supporting plate reinforcing ribs are vertically welded and connected with the lacing wire supporting plates 3.
The connecting lock catch 5 comprises three lock catch forms, namely a tubular lock catch 6, a square lock catch 7 and a flat lock catch 8.
The tubular latch 6 comprises an open steel tube 54 and a T-shaped latch beam 55, and a closed grouting tube 56 is arranged on each side of the T-shaped latch beam 55. The opening steel pipe 54 is made of a steel pipe with the diameter of 200mm, and the T-shaped lock beam 55 is rolled into a T shape by a steel plate with the thickness of 10 mm; the closed grouting pipe 56 is a PVC pipe with a diameter of 50 mm.
The square lock catch 7 comprises a first catching groove side plate 34 and a second catching groove side plate 35, wherein the first catching groove side plate 34 and the second catching groove side plate 35 are formed by rolling steel plates with the thickness of 10mm, the width of the first catching groove side plate is 150mm, and the first catching groove side plate and the second catching groove side plate are symmetrically arranged on two sides of the steel pipe pile 1.
The flat plate lock catch 8 comprises two flat plate lock catch plates 39 respectively arranged on the two steel pipe piles 1, the flat plate lock catch plates 39 are formed by rolling steel plates with the thickness of 10mm, and the width of the flat plate lock catch plates is 150 mm; the locking plate connecting hooks 80 of the two flat locking plates 39 are connected in a counter-pulling manner; the latch plate connecting hook 80 is integrally rolled with the flat latch plate 39, and the width of the latch plate connecting hook is 2 cm; the two adjacent steel pipe piles 1 are respectively provided with a guide slot 79, the guide slot 79 is formed by rolling a steel plate with the thickness of 2mm, the cross section of the guide slot is U-shaped, the depth of the slot is 2cm, and the width of the slot is 1 cm; the guide slot 79 is connected to the guide insert plate 38, and the guide insert plate 38 is rolled from a steel plate having a thickness of 5 mm.
The foundation soil 9 is a cohesive soil in a plastic state.
The platform bottom plate 10 is formed by rolling a steel plate with the thickness of 10mm, the plane is in a ring shape, the inner diameter of the ring is 1000mm, and the outer diameter of the ring is 3000 mm.
The bottom plate anchor bars 11 are made of twisted steel bars with the diameter of 32 mm.
The lower layer position correcting support plate 12 is formed by rolling a steel plate with the thickness of 10mm, and is provided with a screw hole connected with a lower layer position correcting bolt 16; the lower-layer position-correcting bolt 16 is formed by rolling a screw rod with the diameter of 30 mm.
The human-shaped strut 13 is formed by rolling H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12.
The support column top plate 14 is formed by rolling a steel plate with the thickness of 10mm, the plane is circular, the inner diameter of the circular ring is 1200mm, and the outer diameter of the circular ring is 2500 mm. .
The upper-layer position correcting support plate 15 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the upper-layer position correcting support plate is arc-shaped, the central angle of the upper-layer position correcting support plate is 240 degrees, and a lock catch penetrating opening 84 is formed in the upper-layer position correcting support plate; the central angle corresponding to the lock-catch through-hole 84 is 120 degrees. The upper layer position correcting support plate 15 is connected with the upper layer position correcting bolt 17 through screws. The upper-layer position-correcting bolt 17 adopts a high-strength screw rod with the diameter of 30 mm.
The position correcting arc plate 18 is rolled into a circular arc shape by adopting a steel plate with the thickness of 10mm, and the inner diameter of the circular arc is the same as the outer diameter of the steel pipe pile 1.
The arc plate sealing layer 19 is formed by cutting a rubber plate with the thickness of 1mm and is connected with the position correction arc plate 18 in an adhering mode.
The inner side cross brace 20 and the outer side cross brace 21 both adopt H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12.
The connecting pressing plate 22 is formed by rolling a steel plate with the thickness of 10mm, and the connecting surface of the connecting pressing plate and the steel pipe pile 1 is in a circular arc shape.
The cross-brace hoop 23 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the cross-brace hoop is rectangular, the cross-brace hoop comprises two rectangular hoop straps, and the opposite hoop straps are connected through bolts.
The wale reinforcing beam 24 is rolled from a steel plate having a thickness of 100 mm.
The hoop connecting bolt 25 is a high-strength screw rod with the diameter of 20 mm.
The hoop-side tie bars 26 are made of steel pipe having a diameter of 60 mm.
The arc plate adjusting bolt 27 is composed of a high-strength screw rod and a bolt with the diameter of 30 mm.
The pile side arc plate 28 is formed by rolling a steel plate with the thickness of 2mm, the plane is arc-shaped, and the inner diameter of the plane is the same as the outer diameter of the steel pipe pile 1.
The pile internal filling body 29 adopts dense-graded gravel sand.
The prestressed pull rod 30 is formed by rolling a screw rod with the diameter of 30 mm.
The tie rod fastening bolt 31 is matched with the prestressed tie rod 30.
The bladder filler 32 is a clay slurry.
The side plate connecting plate 36 is formed by rolling a steel plate with the thickness of 2mm and is vertically welded with the first catching groove side plate 34 and the second catching groove side plate 35 which are connected with each other.
The first, second and third obturation bodies 37, 33 and 40 all use self-compacting concrete with a strength class C50.
The inner wall connecting plate 42 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the inner wall connecting plate is arc-shaped, and the central angle of the inner wall connecting plate is 45 degrees; an elastic connecting rib 89 is arranged between the two opposite inner wall connecting plates 42, the elastic connecting rib 89 is made of a spring material with the diameter of 20mm, and pulling force is applied to the inner wall connecting plates 42 in a natural state.
The inner supporting pressing plate 43 is formed by rolling a steel plate with the thickness of 20mm, the plane is circular, and the diameter is 100 cm.
The rotating connecting rods 44 are made of steel pipes with the diameter of 50mm, two ends of the rotating connecting rods are connected with the inner supporting pressure rod 41 and the inner wall connecting plate 42 through connecting rod rotating hinges 88, and each inner wall connecting plate 42 is connected with two rotating connecting rods 44. The inner supporting pressure rod 41 is made of a steel pipe with the diameter of 50 mm; the connecting rod rotating hinge 88 adopts a spherical hinge with the diameter of 50 mm.
The pile top pressing cap 45 is formed by rolling a steel plate with the thickness of 10mm and is sleeved at the top end of the steel pipe pile 1.
The pressure plate adjusting bolt 46 is composed of a high-strength screw rod and a bolt with the diameter of 30 mm.
The hanger rod top support 47 is formed by rolling a steel plate with the thickness of 20mm, the width of the hanger rod top support is 20cm, and a hole for the platform hanger rod 51 to pass through is formed in the hanger rod top support; the platform boom 51 is a steel pipe with a diameter of 100mm, and a bolt connected to the boom positioning pin 91 is provided on the outer surface thereof. Boom position pin 91 mates with platform boom 51.
The boom guy 49 is a wire rope having a diameter of 30 mm.
The cable tie bar 50 is made of a twisted steel bar with a diameter of 12 mm.
The construction platform 52 is formed by rolling a steel plate with the thickness of 2 mm.
The closed-end concrete 53 is concrete having a strength grade of C50.
The bag bottom arc plate 59 is formed by rolling a steel plate with the thickness of 10mm, the plane of the bag bottom arc plate is semicircular, the bag bottom arc plate is connected with the sliding vertical plate 57 through a vertical plate connecting plate 60, a bag connecting rib 61 is arranged between the bag bottom arc plate and the grouting bag 58, and a pressure pipe connecting bolt 62 is arranged on the upper surface of the bag bottom arc plate; the sliding vertical plate 57 and the vertical plate connecting plate 60 are both formed by rolling steel plates with the thickness of 10 mm; the bag connecting rib 61 is made of a spring with the diameter of 5 mm; the grouting bag 58 is formed by sewing rubber sheets with the thickness of 2mm, and the plane is arc-shaped.
The bag pressing pipe 63 is a steel pipe with the diameter of 30mm, and the bottom end of the bag pressing pipe is provided with a thread connected with the pressing pipe connecting bolt 62; the tube connector 62 is mated with the bladder tube 63.
The inner support core plate 64 is formed by rolling a steel plate with the thickness of 20mm, and the diameter of the inner support core plate is 30 cm; inserting the inner support core plate 64 into the steel pipe pile 1, and firmly connecting the arc-shaped pressing plate 66 with the inner side wall of the steel pipe pile 1 through the pressing plate positioning bolt 65 on the outer side of the inner support core plate 64; the arc-shaped pressing plate 66 is formed by rolling steel with the thickness of 10mm, the central angle is 15 degrees, and the outer diameter of the arc-shaped pressing plate is the same as the inner diameter of the steel pipe pile 1. The pressure plate position adjusting bolt 65 is composed of a screw rod with the diameter of 10mm and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite.
The upper surface of the inner support core plate 64 is sequentially provided with a core plate connecting rod 67 and a pile top connecting plate 68, and the pile top connecting plate 68 is connected with the top end of the steel pipe pile 1; the core plate connecting rod 67 is a steel plate with the diameter of 200mm and the thickness of 10 mm; the pile top connecting plate 68 is formed by rolling a steel plate with the thickness of 10mm, and a platform plate connecting rod 69 and a pressure pipe platform plate 70 are sequentially arranged on the pile top connecting plate; a pressure pipe guide pipe 74 is arranged at the joint of the pressure pipe platform plate 70 and the bag pressure pipe 63. Platform plate link 69 is a steel tube of 100mm diameter. The pressure tube platform plate 70 is formed by rolling a steel plate with the thickness of 2 mm.
The pressure pipe screw 71 is a screw with the diameter of 30mm and is vertically welded and connected with the pressure pipe hoop 75; the pressure pipe bolt 73 is matched with the pressure pipe screw 71.
The hoop side pressure bearing plate 72 is connected with the bag pressing pipe 63 through a pressing pipe hoop 75; the hoop-side pressure bearing plate 72 and the pressure pipe hoop 75 are both formed by rolling steel plates with the thickness of 10 mm.
Curb plate projecting falcon 76 and curb plate falcon groove 77 phase-match, and the lateral section of curb plate projecting falcon 76 personally submits isosceles trapezoid, and the top width is 0.5cm, and the end width is 1cm, adopts the steel sheet rolling that thickness is 2mm to form.
The side plate airtight body 78 is cut out of a rubber plate having a thickness of 1 mm.
The fastening bolt connector 81 is formed of a high-strength bolt having a thread diameter of 30 mm.
The flat plate fastening bolt 82 is composed of a high-strength screw rod with the diameter of 30mm and a bolt, and is arranged on the backwater side of the cofferdam of the steel pipe pile 1.
The lock catch inner seal layer 83 is made of a rubber plate with the thickness of 1mm and is adhered and connected with the lock catch plate connecting hook 80.
The position-correcting bolt slot hole 86 adopts a bolt with the thread diameter matched with the upper-layer position-correcting bolt 17.
The brace inner connecting plate 87 is formed by rolling a steel plate with the thickness of 2mm, is annularly arranged along the periphery of the steel pipe pile 1 and is connected with the human-shaped brace 13 in a welding mode.
The cross brace connecting hoop 90 and the hoop side connecting groove 85 are both formed by rolling steel plates with the thickness of 2 mm. The cross section of the cross-brace connecting hoop 90 is rectangular, the cross section of the hoop side connecting groove 85 is U-shaped, and the clear width of the connecting hoop is 22 cm.
The above embodiments may be combined with each other.
It should be noted that in the description of the present specification, descriptions such as "first", "second", etc. are only used for distinguishing features, and do not have an actual order or meaning, and the present application is not limited thereto.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The construction method of the bridge foundation cofferdam is characterized by comprising the following construction steps:
1) construction preparation:
surveying and mapping to determine the plane position of the steel pipe pile (1), preparing materials and devices required by construction, and determining a site construction process;
2) processing the steel pipe pile and the connecting lock catch:
rolling a steel pipe pile (1) with the diameter and the length meeting the requirements according to the requirements, arranging 1-3 pile side connecting arc plates (2) on the outer side wall of the steel pipe pile (1), and arranging two tie bar supporting plates (3) on each pile side connecting arc plate (2); a supporting plate reinforcing rib (4) is arranged between two bracing supporting plates (3) on the same pile side connecting arc plate (2); a connecting lock catch (5) is arranged at the joint of the steel pipe pile (1); the connecting lock catch (5) is a tubular lock catch (6), a square lock catch (7) or a flat lock catch (8);
3) the steel pipe pile is subjected to position correction and insertion:
a platform bottom plate (10) is arranged on foundation soil (9) on the outer side of a pile position of the steel pipe pile (1), and the platform bottom plate (10) is firmly connected with the foundation soil (9) through bottom plate anchor bars (11); a lower layer of correction supporting plates (12) and human-shaped supporting columns (13) are arranged on the platform bottom plate (10), and supporting column top plates (14) are arranged at the top ends of the human-shaped supporting columns (13); arranging an upper-layer position correcting support plate (15) on the side, facing the steel pipe pile (1), of the support column top plate (14); a lower-layer position-correcting bolt (16) and an upper-layer position-correcting bolt (17) are respectively arranged on the lower-layer position-correcting support plate (12) and the upper-layer position-correcting support plate (15), and a position-correcting arc plate (18) and an arc plate sealing layer (19) are sequentially arranged on the upper-layer position-correcting bolt (17) facing the steel pipe pile (1);
4) the outside stull sets up with inboard stull:
according to the plane position of the steel pipe pile (1), the inner side cross brace (20) and the outer side cross brace (21) are respectively positioned at two sides of the steel pipe pile (1), and connecting pressing plates (22) are arranged on the connection surfaces of the inner side cross brace (20) and the outer side cross brace (21) and the steel pipe pile (1); a cross brace connecting hoop (90) is arranged at the corner part of the steel pipe pile (1), and a cross brace reinforcing beam (24) is additionally arranged at the corner part of the inner cross brace (20), so that one end of the cross brace reinforcing beam (24) is connected with a cross brace hoop (23) in a welding manner, and the other end of the cross brace reinforcing beam is connected with the cross brace hoop (23) through a hoop connecting bolt (25); a hoop side connecting rib (26) is arranged between the cross brace hoop (23) and the steel pipe pile (1), and the hoop side connecting rib (26) is connected with the steel pipe pile (1) through an arc plate adjusting bolt (27) and a pile side arc plate (28); blowing and filling bulk materials to the bottom end of the steel pipe pile (1) to form a pile filling body (29);
5) and (3) connection and reinforcement of the steel pipe pile:
the prestressed pull rod (30) penetrates through the lacing wire supporting plate (3), and tensile force is applied to the prestressed pull rod (30) through the pull rod fastening bolt (31); for the tubular lock catch (6), a grouting bag filling body (32) is pressed in a grouting bag (58) through an external grouting pipe, and a second closing body (33) is pressed in a cavity of the T-shaped lock beam (55) and the opening steel pipe (54) through a closing grouting pipe (56); for the square lock catch (7), a first closing body (37) is injected into a cavity formed by enclosing the first buckle groove side plate (34), the second buckle groove side plate (35) and the side plate connecting plate (36) through an external grouting pipe; for the flat latch (8), a third obturator (40) is injected into a cavity formed by enclosing the external mud jacking pipe guide inserting plate (38) and the flat latch plate (39);
6) erecting a pile-supported construction platform:
inserting an inner supporting pressure rod (41) and an inner wall connecting plate (42) into the steel pipe pile (1), arranging an inner supporting pressure plate (43) at the top end of the inner supporting pressure rod (41), and arranging a rotating connecting rod (44) between the inner supporting pressure rod (41) and the inner wall connecting plate (42); a pile top pressing cap (45) is arranged at the top end of the steel pipe pile (1), the pile top pressing cap (45) and an inner supporting pressing plate (43) pass through a pressing plate adjusting bolt (46), and a supporting connecting rib (48) connected with a suspender supporting (47) is arranged on the upper surface of the pile top pressing cap; a suspender stay cable (49) and a stay cable connecting bar (50) are arranged between one side of the suspender top support (47) and the outer side cross support (21), the other side of the suspender is provided with a platform suspender (51), and the bottom end of the platform suspender (51) is provided with a construction platform (52); the height of the construction platform (52) is controlled by a suspender position control bolt (91) at the top end of the platform suspender (51);
7) and (3) pouring bottom sealing concrete:
concrete pouring construction is performed in a cofferdam formed by enclosing the steel pipe piles (1) on the construction platform (52) to form bottom sealing concrete (53).
2. The construction method of the bridge foundation cofferdam of claim 1, wherein in the step 2), the tubular lock catch (6) comprises an open steel pipe (54) and a T-shaped lock beam (55), and both sides of the T-shaped lock beam (55) are provided with a closed grouting pipe (56); the slip vertical plate (57) is stuck and connected with a grouting bag (58), and the bottom of the slip vertical plate is provided with a bag bottom arc plate (59); the bag bottom arc plate (59) is made of a steel plate, the plane of the bag bottom arc plate is semicircular or circular arc-shaped, the bag bottom arc plate is connected with the sliding vertical plate (57) through a vertical plate connecting plate (60), a bag connecting rib (61) is arranged between the bag bottom arc plate and the grouting bag (58), and a pressure pipe connecting bolt (62) is arranged on the upper surface of the bag bottom arc plate; the bottom end of the bag pressing pipe (63) is connected with a pressing pipe connecting bolt (62); the inner supporting core plate (64) is inserted into the steel pipe pile (1), and the arc-shaped pressing plate (66) is firmly connected with the inner side wall of the steel pipe pile (1) through the pressing plate positioning bolt (65) on the outer side of the inner supporting core plate (64).
3. The construction method of the bridge foundation cofferdam of claim 2, wherein the central angle of the arc-shaped pressing plate (66) is 15-30 degrees, and the outer diameter is the same as the inner diameter of the steel pipe pile (1); a core plate connecting rod (67) and a pile top connecting plate (68) are sequentially arranged on the upper surface of the inner support core plate (64), and the pile top connecting plate (68) is connected with the top end of the steel pipe pile (1); the pile top connecting plate (68) is a steel plate, and a platform plate connecting rod (69) and a pressure pipe platform plate (70) are sequentially arranged on the steel plate; a pipe pressing screw rod (71) vertically welded and connected with the pipe pressing platform plate (70) is arranged on the pipe pressing platform plate, and the pipe pressing screw rod (71) is connected with a pipe pressing bolt (73) after passing through the hoop side pressure bearing plate (72); a pressing pipe guide pipe (74) is arranged at the joint of the pressing pipe platform plate (70) and the bag pressing pipe (63); the hoop side pressure bearing plate (72) is connected with the bag pressing pipe (63) through a pressing pipe hoop (75).
4. The construction method of the bridge foundation cofferdam of claim 1, wherein in the step 2), the square locks (7) comprise a first catching groove side plate (34) and a second catching groove side plate (35); the first catching groove side plate (34) and the second catching groove side plate (35) are both made of steel plates and symmetrically arranged on two sides of the steel pipe pile (1), the number of the first catching groove side plate (34) and the number of the second catching groove side plate (35) are two, and side plate connecting plates (36) are respectively arranged between the two first catching groove side plates (34) and the two second catching groove side plates (35); set up curb plate tenon (76) towards second catching groove curb plate (35) side at first catching groove curb plate (34), set up curb plate tenon recess (77) on second catching groove curb plate (35) to set up curb plate obturator (78) between curb plate tenon recess (77) and curb plate tenon recess (76).
5. The construction method of the bridge foundation cofferdam of claim 1, wherein in the step 2), the flat plate lock catch (8) comprises two flat plate lock catch plates (39) respectively arranged on the two steel pipe piles (1); guide slots (79) are respectively arranged on two adjacent steel pipe piles (1), guide inserting plates (38) are arranged in the guide slots (79), and locking plate connecting hooks (80) of two flat locking plates (39) are connected in a split mode; fastening bolt connectors (81) are respectively arranged on the outer side wall of one steel pipe pile (1) and the flat locking plate (39) on the other steel pipe pile (1) connected with the outer side wall of the steel pipe pile (1), and flat fastening bolts (82) are arranged between the opposite fastening bolt connectors (81).
6. The construction method of the bridge foundation cofferdam of claim 5, wherein the flat locking plate (39) is rolled by steel plate, one end of the flat locking plate is welded with the steel pipe pile (1), the other end is provided with a locking plate connecting hook (80) connected with the flat locking plate (39), and the end of the locking plate connecting hook (80) is provided with a locking inner seal layer (83); the flat plate fastening bolt (82) comprises a screw and a bolt and is arranged on the backwater side of the cofferdam of the steel pipe pile (1).
7. The construction method of the bridge foundation cofferdam of claim 1, wherein in the step 3), the upper positioning support plate (15) is rolled by steel plates, the cross section of the upper positioning support plate is arc-shaped, the central angle of the upper positioning support plate is 180 degrees to 270 degrees, and a lock catch through hole (84) is arranged on the upper positioning support plate and is connected with the upper positioning bolt (17) through screws; the upper-layer position-correcting bolt (17) and the position-correcting arc plate (18) are connected with the arc plate sealing layer (19) in a sticking way through a position-correcting bolt slot hole (86) and the position-correcting arc plate (18); the side, facing the steel pipe pile (1), of the human-shaped supporting column (13) is provided with a supporting column inner connecting plate (87); the bracing column inner connecting plates (87) are annularly arranged along the periphery of the steel pipe pile (1) and are connected with the human-shaped bracing column (13) in a welding mode.
8. The construction method of the bridge foundation cofferdam of claim 1, wherein in the step 4), the connecting pressing plate (22) is rolled by steel plates, and the connecting surface with the steel pipe pile (1) is in a circular arc shape; the transverse strut connecting hoop (90) and the hoop side connecting groove (85) are formed by rolling steel plates, one of the two outer transverse struts (21) or the inner transverse strut (20) which are vertically connected penetrates through the transverse strut connecting hoop (90), and the other one of the two outer transverse struts or the inner transverse strut is arranged on the hoop side connecting groove (85); the cross section of the cross-brace connecting hoop (90) is rectangular, and the cross section of the hoop side connecting groove (85) is U-shaped; the arc plate adjusting bolt (27) is formed by combining three sections of screw rods and two bolts, the screw rods and the bolts are arranged at intervals, and the middle screw rod is vertically welded and connected with the hoop side connecting rib (26).
9. The construction method of the bridge foundation cofferdam of claim 1, wherein in step 5), the sack filling body (32) is light concrete or water or slurry; the first airtight body (37), the second airtight body (33) and the third airtight body (40) are made of self-compacting concrete or grouting materials.
10. The construction method of a bridge foundation cofferdam according to claim 1, wherein in step 6), the rotating connecting rods (44) are steel pipes, both ends of the rotating connecting rods are connected with the inner bracing pressure rod (41) and the inner wall connecting plate (42) through connecting rod rotating hinges (88), and the inner wall connecting plate (42) of each block is connected with two rotating connecting rods (44); the cross section of the inner wall connecting plate (42) is arc-shaped, the central angle is 45-60 degrees, and an elastic connecting rib (89) is arranged between the two opposite inner wall connecting plates (42); the elastic connecting rib (89) adopts a spring; the platform suspender (51) is formed by rolling a steel pipe, and the top end of the platform suspender penetrates through the suspender shoring (47) and then is connected with the suspender position control bolt (91) through a screw.
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| CN112227391B (en) * | 2020-10-14 | 2021-10-08 | 安徽省交通建设股份有限公司 | Ecological steel sheet pile island-building cofferdam and construction method |
| CN112878350B (en) * | 2021-01-15 | 2022-10-25 | 北京市市政四建设工程有限责任公司 | Construction method for accurate grouting waterproof curtain of deep-buried underground excavation station |
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| CN205399446U (en) * | 2016-03-23 | 2016-07-27 | 广西大学 | Novel hasp steel pipe cofferdam structure |
| CN106836236A (en) * | 2017-02-24 | 2017-06-13 | 张继红 | A kind of ultra-deep steel pipe concrete continuous underground wall structure and its construction method |
| CN207749510U (en) * | 2017-12-22 | 2018-08-21 | 中国建筑股份有限公司 | Assembly type H profile steel sheet pile |
| CN209669851U (en) * | 2018-12-25 | 2019-11-22 | 中铁十七局集团有限公司 | A kind of steel-pipe pile goes along with sb. to guard him constructing structure |
| CN110144914A (en) * | 2019-06-03 | 2019-08-20 | 四川公路桥梁建设集团有限公司 | A kind of deep water contrary sequence method construction method of opening locked steel tube pilecofferdam |
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