CN-121976552-A - Locking steel pipe pile cofferdam structure and water stopping method thereof

CN121976552ACN 121976552 ACN121976552 ACN 121976552ACN-121976552-A

Abstract

The invention relates to the technical field of a locking mouth steel pipe pile cofferdam structure and a water stopping method thereof, wherein the first limiting piece, the second limiting piece and the third limiting piece are identical in structure and are assembled in an inserted manner, the locking mouth cofferdam structure comprises locking hook plates, the end parts of the locking hook plates are provided with locking convex edges, the inner sides of the locking hook plates are provided with clamping grooves, the outer sides of outer water stopping strips are integrally formed with water diversion strips, the inner sides of the outer water stopping strips are integrally formed with inner water stopping strips, expansion sealing strips communicated with a water guiding channel are filled in the clamping grooves, the on-site construction process is simplified, pressure fluctuation caused by water flow is effectively slowed down by the application of a buffering piece, the stability of the locking mouth structure is enhanced, the structure can keep good sealing performance for a long time, and the waterproof capacity of the cofferdam locking mouth is effectively improved through the design of a multi-layer waterproof structure.

Inventors

MENG QINGKE
LI LIANGLIANG
ZHU WENQIANG
LI HANG
Mo Luning
JIANG YIKAI
SHI HAITAO
LIU XIN

Assignees

中铁大桥局上海工程有限公司

Dates

Publication Date: 20260505
Application Date: 20260202

Claims (10)

1. The utility model provides a fore shaft steel-pipe pile cofferdam structure, forms based on standard stake (100) and turning stake (200) cooperation grafting, the welding has second locating part (20) on standard stake (100) right side wall, all weld first locating part (10) on standard stake (100) and the left side wall of turning stake (200), welding has third locating part (30) on turning stake (200) lateral wall, wherein first locating part (10), second locating part (20) and third locating part (30) structure are the same and peg graft the assembly each other, and all include locking hook plate (35), locking hook plate (35) tip sets up to locking protruding stupefied (31), locking hook plate (35) inboard sets up to block groove (32), block groove (32) interior sealing member (40) that carries out self-adaptation to first locating part (10), second locating part (20) and third locating part (30) after peg graft the assembly; Sealing member (40) are including outer sealing strip (41), outer sealing strip (41) outside integrated into one piece is provided with draws water strip (42), outer sealing strip (41) inboard integrated into one piece is provided with inlayer sealing strip (44), the equipartition has water guide channel (45) that run through inlayer sealing strip (44) in outer sealing strip (41), the intussuseption of block groove (32) is filled with expansion sealing strip (60) with water guide channel (45) intercommunication.
2. The fore shaft steel-pipe pile cofferdam structure of claim 1, wherein the first limiting piece (10) and the second limiting piece (20) on the standard pile (100) are symmetrical with the axis of the standard pile (100) as the center of a symmetry axis, the angle between the first limiting piece (10) and the third limiting piece (30) on the corner pile (200) is 90 degrees, and the section of the locking hook plate (35) is hook-shaped.
3. The steel pipe pile cofferdam structure with the locking notch according to claim 1, wherein the cross section of each locking convex rib (31) is circular, when two adjacent groups of limiting pieces are clamped, the two groups of locking hook plates (35) are mutually nested and clamped, the locking convex ribs (31) are clamped in the clamping grooves (32), a buffer piece (50) is assembled between the two groups of locking convex ribs (31), and the sealing piece (40) is filled between the two groups of locking hook plates (35).
4. The steel pipe pile cofferdam structure with the locking notch according to claim 1, wherein the water diversion strip (42) is provided with a water diversion groove (43), the water diversion groove (43) is a V-shaped groove and is communicated with the water diversion channel (45), after the two groups of limiting pieces are clamped, an expansion rubber material is filled in a space which is formed by the inside of the clamping groove (32) and is surrounded by the sealing piece (40) and the locking convex ridge (31), and the expansion rubber material is filled in a gap formed by the clamping of the two groups of locking hook plates (35) when meeting water expansion, so that an expansion sealing strip (60) is formed.
5. The structure of claim 4, wherein the cross-sectional shape of the expansion seal strip (60) is tapered by the outer side wall of the locking ridge (31), the inner side wall of the engagement groove (32), and the outer side wall of the seal member (40).
6. The steel pipe pile cofferdam structure with the locking notch according to claim 3, wherein three groups of first strip-shaped sealing grooves (33) are formed in the inner side wall of the locking hook plate (35) and the corresponding position of the sealing piece (40), three groups of second strip-shaped sealing grooves (34) are formed in the outer side wall of the locking hook plate and the corresponding position of the inner layer water stop strip (44), expansion rubber strips (46) corresponding to the first strip-shaped sealing grooves (33) and the second strip-shaped sealing grooves (34) are arranged on the front side wall and the rear side wall of the inner layer water stop strip (44), and the expansion rubber strips (46) expand outwards when meeting water and are filled in the first strip-shaped sealing grooves (34) and the second strip-shaped sealing grooves (34) to form locking convex strips (47).
7. The steel-pipe pile cofferdam structure with the fore shaft of claim 6, wherein the first strip-shaped sealing groove (33) and the second strip-shaped sealing groove (34) are respectively arranged along the height direction of the locking hook plate (35), the expansion rubber strip (46) is arranged along the height direction of the sealing piece (40), and the length of the expansion rubber strip (46) is the same as that of the first strip-shaped sealing groove (33) and the second strip-shaped sealing groove (34).
8. The steel pipe pile cofferdam structure with the locking notch as set forth in claim 3, wherein the pressure relieving piece (50) is a sealing rubber strip, the length of the pressure relieving piece is the same as the height of the locking hook plate (35), and a hollow air storage groove (51) is formed in the pressure relieving piece (50).
9. The structure of claim 6, wherein the outer water stop strips (41) and the inner water stop strips (44) are made of EPDM rubber strips, and the expansion rubber strips (46) are sodium polyacrylate hydrophilic strips.
10. A water stopping method of a locking notch steel pipe pile cofferdam structure, which is realized by the locking notch steel pipe pile cofferdam structure as set forth in any one of claims 1-9, and is characterized in that the water stopping method comprises the following steps: s1, after locking hook plates (35) are mutually clamped, a locking structure is naturally formed based on locking convex edges (31), a buffer piece (50) is used for realizing the separation between two groups of locking convex edges (31), the buffer capacity between the two groups of locking convex edges (31) is increased, and the locking capacity of the two groups of locking hook plates (35) is provided; S2, the sealing piece (40) is clamped between the two groups of locking hook plates (35) to realize plugging, the outer water stop strip (41) is embedded at the outer side between the two groups of locking hook plates (35) to realize isolation of external water bodies, the water guide strip (42) guides water to the inner side of the clamping groove (32) through the water guide channel (45) to enable the water guide strip to be contacted with the expansion rubber material, so that the expansion rubber material expands when meeting water and fills in gaps formed after the two groups of locking hook plates (35) are clamped to form expansion sealing strips (60), and the tightness between the two groups of locking hook plates (35) is enhanced; And S3, in the process that the water body passes through the water guide channel (45), water is contacted with the expansion rubber strip (46), the expansion rubber strip (46) is promoted to expand and is embedded in the first strip-shaped sealing groove (33) and the second strip-shaped sealing groove (34) to form a locking convex strip (47) for limiting the two groups of locking hook plates (35), and meanwhile, the waterproof tightness between the two groups of locking hook plates (35) is further enhanced.

Description

Locking steel pipe pile cofferdam structure and water stopping method thereof Technical Field The invention relates to the technical field of a fore shaft steel pipe pile cofferdam structure, in particular to a fore shaft steel pipe pile cofferdam structure and a water stopping method thereof. Background The cofferdam is a temporary building enclosure which is constructed for constructing permanent water conservancy facilities in the construction of water conservancy projects, and has the functions of preventing water and soil from entering the construction position of a building so as to drain water in the cofferdam, excavate a foundation pit and construct the building; the river with deeper water and larger flow velocity can adopt the wooden sheet piles or the steel sheet pile cofferdam and a plurality of double-layer thin-wall steel cofferdams, and the cofferdam can not only prevent water and enclose water, but also support the pit wall of the foundation pit. The utility model provides a locking structure of steel-pipe pile cofferdam and stagnant water method thereof, is CN202010712230.6, including steel-pipe pile standard stake, steel-pipe pile corner pile, the steel-pipe pile standard stake comprises steel-pipe pile outer flange, steel-pipe pile indent and steel-pipe pile body, and the steel-pipe pile body is ordinary steel-pipe pile, and its bottom is provided with the pile point, and steel-pipe pile outer flange comprises outer flange support diaphragm, outer flange support riser, outer flange frame and outer flange sealing strip. However, in the actual use process, the existing cofferdam structure is easy to loosen or shift due to the change of water flow pressure or external force, so that the stability of the structure is influenced, the waterproof effect is further influenced, and the tightness is easy to be reduced, so that water leakage is caused particularly in the environment with larger water flow pressure and water level change. Therefore, the invention provides a locking steel pipe pile cofferdam structure and a water stopping method thereof to solve the problems. Disclosure of Invention The invention aims to provide a locking steel pipe pile cofferdam structure and a water stopping method thereof, which are used for solving the problems in the background technology. The locking mouth steel pipe pile cofferdam structure is formed by matching and inserting a standard pile and a corner pile, wherein a second limiting piece is welded on the right side wall of the standard pile, a first limiting piece is welded on the left side wall of the standard pile and the left side wall of the corner pile, a third limiting piece is welded on the outer side wall of the corner pile, the first limiting piece, the second limiting piece and the third limiting piece are identical in structure and are assembled in an inserted manner, the locking mouth steel pipe pile cofferdam structure comprises locking hook plates, the end parts of the locking hook plates are provided with locking protruding edges, the inner sides of the locking hook plates are provided with clamping grooves, and sealing pieces for adaptively sealing after the first limiting piece, the second limiting piece and the third limiting piece are assembled in an inserted manner are assembled in the clamping grooves; The sealing piece comprises an outer water stop strip, the outer water stop strip is integrally formed in the outer side of the outer water stop strip and is provided with an inner water stop strip, water guide channels penetrating through the inner water stop strip are uniformly distributed in the outer water stop strip, and expansion sealing strips communicated with the water guide channels are filled in the clamping grooves. Preferably, the first limiting piece and the second limiting piece on the standard pile are centered and symmetrical by taking the axial lead of the standard pile as a symmetrical axis, the angle between the first limiting piece and the third limiting piece on the corner pile is 90 degrees, and the section of the locking hook plate is hook-shaped. Preferably, the cross section of the locking convex edge is circular, when two adjacent groups of limiting parts are clamped, the two groups of locking hook plates are mutually nested and clamped, the locking convex edge is clamped in the clamping groove, a buffering part is assembled between the two groups of locking convex edges, and the sealing part is filled between the two groups of locking hook plates. Preferably, the water diversion strip is provided with a water diversion groove, the water diversion groove is a V-shaped groove and is communicated with the water diversion channel, after the two groups of limiting parts are clamped, an expansion rubber material is filled in a space which is formed by surrounding the sealing part and the locking convex edge inside the clamping groove, and the expansion rubber material is filled in a gap formed by clamping the two gr