CN102518140A - Locking opening structure of steel cofferdam and construction method for locking opening structure - Google Patents

Locking opening structure of steel cofferdam and construction method for locking opening structure Download PDF

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Publication number
CN102518140A
CN102518140A CN201110430678XA CN201110430678A CN102518140A CN 102518140 A CN102518140 A CN 102518140A CN 201110430678X A CN201110430678X A CN 201110430678XA CN 201110430678 A CN201110430678 A CN 201110430678A CN 102518140 A CN102518140 A CN 102518140A
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China
Prior art keywords
steel pipe
cofferdam
interior
opening
outer steel
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CN201110430678XA
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CN102518140B (en
Inventor
冯广胜
罗瑞华
宋洪喜
曹文芳
张耀
李陆平
沈涛
李智勇
韩博
郑大超
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China Railway Major Bridge Engineering Group Co Ltd MBEC
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China Railway Major Bridge Engineering Co Ltd
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Abstract

A locking opening structure of a steel cofferdam and a construction method for the locking opening structure relate to the field of deep foundation pit or water foundation construction. The locking opening structure comprises an outer steel pipe and an inner steel pipe, wherein the inner steel pipe is sleeved in the outer steel pipe, both the inner steel pipe and the outer steel pipe are provided with a longitudinal opening, and the outer diameter of the inner steel pipe is 1-2mm larger than the inner diameter of the outer steel pipe. The construction method includes the steps: selecting the outer steel pipe and the inner steel pipe, longitudinally cutting each steel pipe to form one opening, and adjusting pipe diameters of the outer steel pipe and the inner steel pipe which are unmatched so that the outer diameter of the inner diameter is 1-2mm larger than the inner diameter of the outer steel pipe; welding the outer steel pipe and the inner steel pipe at the positions of locking openings of two adjacent steel cofferdam components respectively, wherein the opening of the outer steel pipe is opposite to the opening of the inner steel pipe; applying grease mixing materials on the inner wall of the outer steel pipe and inserting the inner steel pipe into the outer steel pipe 1; and inserting and piling the steel cofferdam without performing grouting and filling sealing materials at the locking openings, so that construction of the steel cofferdam can be quickly completed, and good sealing effect is achieved.

Description

A kind of locking notch structure of steel cofferdam and job practices thereof
Technical field
The present invention relates to foundation construction field in deep foundation ditch or the water, specifically is a kind of locking notch structure and job practices thereof of steel cofferdam.
Background technology
The fore shaft steel cofferdam that adopt on the basis in existing large-scale deep foundation or the water, because job practices is simple, cost drops into less, is widely used.But the fore shaft sealing problem of existing steel cofferdam never is well solved; Usually need the steel cofferdam member insert beat after; To carrying out grouting treatment in the fore shaft or filling other sealing material; Because the fore shaft working space is little, and grouting or to fill the difficulty of construction of sealing material big under water, therefore can influence construction speed; In addition, also need throw in mixture sealings such as clay, saw foam, slag when this type of locking notch structure draws water in the cofferdam usually, otherwise just can not reach stagnant water effect preferably in the fore shaft outside.
Summary of the invention
To the defective that exists in the prior art; The object of the present invention is to provide a kind of locking notch structure and job practices thereof of steel cofferdam; The steel cofferdam that adopts this locking notch structure construction is after slotting beating; Needn't carry out the grouting treatment of fore shaft or fill sealing material, thereby can accomplish the steel cofferdam construction fast, form stagnant water effect preferably.
For reaching above purpose, the present invention provides a kind of locking notch structure of steel cofferdam, comprises outer steel pipe and interior steel pipe, and interior steel pipe socket is located in the outer steel pipe, and said interior steel pipe all vertically is provided with opening with outer steel pipe, and the external diameter of said interior steel pipe is than the big 1～2mm of internal diameter of outer steel pipe.
On the basis of technique scheme, the inwall of said outer steel pipe scribbles the butter compound.
On the basis of technique scheme, the longitudinal cross-section at the two ends of said interior steel pipe is trapezoidal.
On the basis of technique scheme, the opening of said interior steel pipe, the opening of outer steel pipe do not overlap.
On the basis of technique scheme, said in steel pipe and outer steel pipe axis overlap, and the opening of the opening of interior steel pipe, outer steel pipe lays respectively at the two ends of interior diameter of steel tube.
On the basis of technique scheme, said interior steel pipe is welded in the fore shaft place that faces two steel cofferdam members mutually through round bar respectively with outer steel pipe.
On the basis of technique scheme, said interior steel pipe welds two round bars respectively with outer steel pipe.
On the basis of technique scheme, the round bar of interior steel pipe welding is positioned at the outer wall relative with the steel pipe opening, and is positioned at the opening of said outer steel pipe.
The present invention also provides a kind of job practices of locking notch structure of steel cofferdam; Comprise the steps: to select outer steel pipe and interior steel pipe; On the two, carry out longitudinal cut respectively and form opening; Unmatched outer steel pipe and interior steel pipe are carried out the caliber adjustment, and the external diameter of steel pipe is than the big 1～2mm of internal diameter of outer steel pipe in reaching; Outer steel pipe and interior steel pipe are welded in the fore shaft place of adjacent two steel cofferdam members respectively, and the opening of the opening of outer steel pipe, interior steel pipe is relative; The inwall coating butter compound of steel pipe carries out inserting when beating of steel cofferdam member outside, and interior steel pipe is inserted in the outer steel pipe 1.
On the basis of technique scheme, said outer steel pipe and interior steel pipe are respectively through two round bars and the welding of steel cofferdam member, and two round bars (4) spacing of interior steel pipe welding is less than the extended distance on the outer steel pipe.
Beneficial effect of the present invention is:
1. the external diameter of steel pipe is inserted when beating between therefore interior steel pipe and the outer steel pipe than the big 1～2mm of internal diameter of outer steel pipe in said, reaches closely connected effect through mutual jam-packed effect between the tube wall; Outer steel pipe inwall coating butter compound intercepts simultaneously, thereby plays good stagnant water effect, reaches the purpose in blocking-up water route.
2. outer steel pipe inwall scribbles the butter compound, reduces to insert the frictional resistance between tube wall when breaking the steel cofferdam member, plays lubrication, can conveniently insert and beat, and accomplishes the steel cofferdam construction fast.
3. the longitudinal cross-section at the two ends of interior steel pipe is trapezoidal, so that steel pipe is inserted in the outer steel pipe in the construction.
Description of drawings
Fig. 1 is the plane structure sketch map that embodiment of the invention locking notch structure is connected with both sides steel cofferdam member;
Fig. 2 is the plane structure sketch map that embodiment of the invention steel cofferdam member is connected with outer steel pipe, interior steel pipe respectively;
Fig. 3 is the facade partial sectional view of Fig. 2;
Fig. 4 is the big sketch map of interior steel pipe support;
The sketch map that Fig. 5 dwindles for outer steel pipe.
Reference numeral:
Outer steel pipe 1, interior steel pipe 2, opening 3, round bar 4, steel cofferdam member 5, outer pressurizing unit 6, interior device for spreading 7.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done further explain.
Like Fig. 1, Fig. 2 and shown in Figure 3, the locking notch structure of steel cofferdam of the present invention comprises outer steel pipe 1 and interior steel pipe 2, and interior steel pipe 2 is sheathed in the outer steel pipe 1, and the two axis overlaps.Said outer steel pipe 1 all vertically is provided with opening with interior steel pipe 2; The opening 3 of interior steel pipe 2, the opening 3 of outer steel pipe 1 do not overlap; And the two ends of steel pipe 2 diameters in two openings 3 lay respectively at; And the external diameter of interior steel pipe 2 is than the big 1～2mm of internal diameter of outer steel pipe 1, and the inwall of said outer steel pipe 1 also scribbles the butter compound.Said outer steel pipe 1 is welded in adjacent two steel cofferdam members 5 fore shaft places through round bar 4 respectively with interior steel pipe 2, and said steel cofferdam member 5 is steel sheet pile or steel pipe pile, is steel pipe pile in the present embodiment.Said outer steel pipe 1 welds two round bars 4 respectively with interior steel pipe 2, wherein in the round bar 4 of steel pipe 2 welding, be positioned at the outer wall relative, and be positioned at the opening 3 of said outer steel pipe 1 with the opening of steel pipe 23; The round bar 4 of outer steel pipe 1 welding is positioned at the outer wall relative with its opening 3.The longitudinal cross-section at the two ends of steel pipe 2 is trapezoidal (as shown in Figure 3) in said.
To shown in Figure 5, during construction, the outer steel pipe 1 and interior steel pipe 2 of at first selecting diameter to be more or less the same adopt automatic gas cutting machine that outer steel pipe 1 and interior steel pipe 2 are carried out longitudinal cut and form opening 3 like Fig. 1.Outer steel pipe 1 is mated with interior steel pipe 2, more best with the external diameter of steel pipe 2 in reaching than the big 1～2mm of internal diameter of outer steel pipe 1.If the caliber of outer steel pipe 1 and interior steel pipe 2 is not complementary, can adopt external pressurizing unit 6 external steel pipes 1 or interior steel pipe 2 to push adjustment.Outer pressurizing unit 6 cross sections are square (like Fig. 5), have the circle extruding space of semiclosed setting, can outer steel pipe 1 or interior steel pipe 2 be placed in the circular extruding space, it is pushed adjustment, thereby make its caliber diminish.In addition, device for spreading 7 external steel pipes 1 or interior steel pipe 2 are adjusted in can also adopting, and interior device for spreading 7 cross sections are I shape (like Fig. 4); The groove of its both sides can be positioned at opening 3 places of outer steel pipe 1 or steel pipe 2 just; Thereby make its caliber increase, more than the shape of cross section of outer pressurizing unit 6 and interior device for spreading 7 only limit in the present embodiment, in other embodiments; Outer pressurizing unit 6 can be other shapes with interior device for spreading 7, as long as reach identical extruding or interior support purpose.Internally cut down at the two ends of steel pipe 2, and subdue to trapezoidal the longitudinal cross-section at steel pipe 2 two ends in making, convenient in steel pipe 2 insertion in the steel pipe 1 outside.
Outer steel pipe 1, the interior steel pipe 2 of adjustment coupling are welded with the fore shaft place of steel cofferdam member 5 through round bar 4 respectively; Outer steel pipe 1, interior steel pipe 2 are welded on respectively on the adjacent steel cofferdam member 5, and two round bars 4 of welding on the outer steel pipe 1 are positioned at the outer wall with its opening 3 opposite sides; Two round bars 4 of interior steel pipe 2 and 5 welding of steel cofferdam member are positioned at the outer wall with opening 3 opposite sides of steel pipe 2; And two round bar 4 spacings of interior steel pipe 2 welding are less than opening 3 distances on the outer steel pipe 1, and steel pipe 2 can insert in the outer steel pipe 1 in guaranteeing.Because need between a plurality of steel cofferdam members 5 to connect, then the relative both sides of each steel cofferdam member 5 are welded an outer steel pipe 1 and an interior steel pipe respectively.Because the external diameter of interior steel pipe 2 is than the big 1～2mm of internal diameter of outer steel pipe 1, so before steel cofferdam member 5 slotting the beating, elder generation is the inwall coating butter compound of steel pipe 1 outside, plays lubrication, carries out inserting of steel cofferdam member 5 again and beats.Insert when beating interior steel pipe 2 is inserted in the outer steel pipe 1 on the contiguous steel cofferdam member 5; Two welding round bars 4 in this moment on the steel pipe 2 are positioned at the opening 3 of outer steel pipe 1 just; And the external diameter of interior steel pipe 2 is than the big 1～2mm of internal diameter of outer steel pipe 1, and the two is owing to mutual jam-packed effect reaches closely connected effect.According to said process a plurality of steel cofferdam members 5 are inserted successively and to be beaten, until the sealing completion.
The present invention not only is confined to above-mentioned preferred forms; Anyone can draw other various forms of products under enlightenment of the present invention; Though but on its shape or structure, do any variation, every have identical with a present invention or akin technical scheme, all within its protection domain.

Claims (10)

1. the locking notch structure of a steel cofferdam; Comprise outer steel pipe (1) and interior steel pipe (2); Interior steel pipe (2) is sheathed in the outer steel pipe (1), it is characterized in that: steel pipe (2) and outer steel pipe (1) all vertically are provided with opening (3) in said, and the external diameter of said interior steel pipe (2) is than the big 1～2mm of internal diameter of outer steel pipe (1).
2. the locking notch structure of steel cofferdam as claimed in claim 1, it is characterized in that: the inwall of said outer steel pipe (1) scribbles the butter compound.
3. the locking notch structure of steel cofferdam as claimed in claim 1 is characterized in that: the longitudinal cross-section at the two ends of steel pipe (2) is trapezoidal in said.
4. the locking notch structure of steel cofferdam as claimed in claim 1 is characterized in that: the opening (3) of steel pipe (2), the opening (3) of outer steel pipe (1) do not overlap in said.
5. the locking notch structure of steel cofferdam as claimed in claim 4 is characterized in that: steel pipe (2) and the coincidence of outer steel pipe (1) axis in said, and the opening (3) of the opening (3) of interior steel pipe (2), outer steel pipe (1) lays respectively at the two ends of interior steel pipe (2) diameter.
6. the locking notch structure of steel cofferdam as claimed in claim 1 is characterized in that: steel pipe (2) is welded in the fore shaft place that faces two steel cofferdam members (5) mutually through round bar (4) respectively with outer steel pipe (1) in said.
7. the locking notch structure of steel cofferdam as claimed in claim 6 is characterized in that: steel pipe (2) and outer steel pipe (1) weld two round bars (4) respectively in said.
8. the locking notch structure of steel cofferdam as claimed in claim 6 is characterized in that: the round bar (4) of interior steel pipe (2) welding is positioned at and the relative outer wall of steel pipe (2) opening (3), and is positioned at the opening (3) of said outer steel pipe (1).
9. the job practices of the locking notch structure of a steel cofferdam is characterized in that, comprises the steps:
Select outer steel pipe (1) and interior steel pipe (2), on the two, carry out longitudinal cut respectively and form opening (3), unmatched outer steel pipe (1) and interior steel pipe (2) are carried out the caliber adjustment, reach the internal diameter big 1～2mm of the external diameter of interior steel pipe (2) than outer steel pipe (1);
Outer steel pipe (1) and interior steel pipe (2) are welded in the fore shaft place of adjacent two steel cofferdam members (5) respectively, and the opening (3) of the opening (3) of outer steel pipe (1), interior steel pipe (2) is relative;
The inwall coating butter compound of steel pipe (1) carries out inserting when beating of steel cofferdam member (5) outside, and interior steel pipe (2) is inserted in the outer steel pipe 1.
10. the job practices of the locking notch structure of steel cofferdam as claimed in claim 9; It is characterized in that: said outer steel pipe (1) and interior steel pipe (2) are respectively through two round bars (4) and steel cofferdam member (5) welding, and two round bars (4) spacing of interior steel pipe (2) welding is less than the extended distance on the outer steel pipe (1).
CN201110430678.XA 2011-12-21 2011-12-21 Locking opening structure of steel cofferdam and construction method for locking opening structure Active CN102518140B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104975609A (en) * 2015-07-14 2015-10-14 上海市水利工程集团有限公司 Lock catch type steel tube pile cofferdam and construction method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06146269A (en) * 1992-11-10 1994-05-27 Tokyu Constr Co Ltd Construction method for joint part of underground wall
JP2009084949A (en) * 2007-10-02 2009-04-23 Seibu Polymer Corp Water-cut off joint structure of steel pipe sheet pile
CN101781894A (en) * 2009-12-23 2010-07-21 中铁大桥局集团第一工程有限公司 Steel pipe pile locking notch structure and water-stopping method of steel pipe pile cofferdam
CN201635071U (en) * 2010-02-02 2010-11-17 中交二公局第五工程有限公司 Profile steel lock-type steel pipe pile enclosing structure
CN201908295U (en) * 2010-12-17 2011-07-27 南京万汇新材料科技有限公司 Z-shaped steel plate pile with welded circular-tube fore shaft
CN201943077U (en) * 2011-02-22 2011-08-24 北京城建道桥建设集团有限公司 Waterproof curtain of CT-type fore shaft steel pipe pile
CN202430727U (en) * 2011-12-21 2012-09-12 中铁大桥局股份有限公司 Locking structure of steel cofferdam

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06146269A (en) * 1992-11-10 1994-05-27 Tokyu Constr Co Ltd Construction method for joint part of underground wall
JP2009084949A (en) * 2007-10-02 2009-04-23 Seibu Polymer Corp Water-cut off joint structure of steel pipe sheet pile
CN101781894A (en) * 2009-12-23 2010-07-21 中铁大桥局集团第一工程有限公司 Steel pipe pile locking notch structure and water-stopping method of steel pipe pile cofferdam
CN201635071U (en) * 2010-02-02 2010-11-17 中交二公局第五工程有限公司 Profile steel lock-type steel pipe pile enclosing structure
CN201908295U (en) * 2010-12-17 2011-07-27 南京万汇新材料科技有限公司 Z-shaped steel plate pile with welded circular-tube fore shaft
CN201943077U (en) * 2011-02-22 2011-08-24 北京城建道桥建设集团有限公司 Waterproof curtain of CT-type fore shaft steel pipe pile
CN202430727U (en) * 2011-12-21 2012-09-12 中铁大桥局股份有限公司 Locking structure of steel cofferdam

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王序森，唐寰澄: "《桥梁工程》", 31 December 1995, 中国铁道出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104975609A (en) * 2015-07-14 2015-10-14 上海市水利工程集团有限公司 Lock catch type steel tube pile cofferdam and construction method

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