CN111676991A - Rigid-flexible river closure cofferdam and construction method thereof - Google Patents
Rigid-flexible river closure cofferdam and construction method thereof Download PDFInfo
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- CN111676991A CN111676991A CN202010564394.9A CN202010564394A CN111676991A CN 111676991 A CN111676991 A CN 111676991A CN 202010564394 A CN202010564394 A CN 202010564394A CN 111676991 A CN111676991 A CN 111676991A
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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
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Abstract
The invention discloses a rigid-flexible parallel-connection type river closure cofferdam and a construction method thereof, belonging to the technical field of cofferdam engineering. The construction method of the invention is to weld and install the manufactured vertical guide groove on the upper part of the pile body of the steel pipe pile; driving the tip of the steel pipe pile into a construction area and driving the tip into a row; installing a transverse supporting baffle, and driving a steel sheet pile to be close to the transverse supporting baffle to form a rigid enclosing and blocking system mainly consisting of the steel pipe pile, the steel sheet pile and the transverse supporting baffle; welding lintels on the steel pipe piles arranged in rows; manufacturing a water stopping curtain and a water pressing bag, and sewing the water stopping curtain and the water pressing bag; manufacturing a cement ball, and filling the cement ball into a pressurized water bag; and slowly putting the water-stopping bag and the water-stopping curtain which are connected together into the river bed of the river channel along the steel sheet pile, and firmly embedding the upper end of the water-stopping curtain into the lintel. The invention improves the resistance of the cofferdam by inserting the steel pipe piles and the steel sheet piles which are driven into the hard soil layer at the bottom of the water, and improves the anti-seepage capability of the steel sheet piles at the upper part of the riverbed by the water stopping curtain and the water pressing bag.
Description
Technical Field
The invention belongs to the technical field of cofferdam engineering, and particularly relates to a rigid-flexible river closure cofferdam.
Background
In the construction of various river-crossing, river-crossing and river-related buildings in the existing river, cofferdam closure diversion is needed so as to drain water in the cofferdam, excavate a foundation pit and construct pipelines and buildings in a waterless environment. The cofferdam is a temporary enclosure water retaining structure constructed for constructing permanent water conservancy facilities in diversion engineering. The existing river closure cofferdam has a plurality of forms, wherein the steel frame cofferdam has the advantages of convenient dismantling and construction, less occupation of the river, reusability and the like, and is more and more widely applied. The prior steel frame cofferdam patent technology at present has CN201620012389.6, however, this technique mainly relies on gravity to satisfy the manger plate demand, and not only the manger plate ability is limited, and does not have the measure of preventing the river course bottom infiltration, very easily causes the cofferdam bottom infiltration, also very easily produces the piping phenomenon in the cofferdam, causes serious potential safety hazard to engineering construction.
Therefore, the rigid and flexible river closure cofferdam which is convenient to dismantle and build, good in anti-seepage effect, stable and reliable is important to find.
Disclosure of Invention
The invention aims to provide a rigid-flexible combined river closure cofferdam and a construction method thereof, which improve the resistance of the cofferdam by inserting steel pipe piles and steel sheet piles into a hard soil layer at the bottom of a water, and improve the seepage-proofing capability of the steel sheet piles at the upper part of a river bed by a water-stopping curtain and a water-pressing bag.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a construction method of a rigid-flexible parallel-connection river closure cofferdam, which comprises the following steps:
firstly, selecting profile steel to manufacture a vertical guide groove and a transverse supporting block, and welding and installing the manufactured vertical guide groove on the upper part of a pile body of the steel pipe pile;
step two, driving the tip of the steel pipe pile into a construction area to form a row, wherein the vertical guide groove faces to a deep water area;
mounting a transverse supporting block, and connecting the vertical guide grooves on two adjacent steel pipe piles through the transverse supporting block;
fourthly, steel sheet piles are arranged close to the transverse supporting barriers in a driving mode to form a rigid enclosing system mainly composed of the steel pipe piles, the steel sheet piles and the transverse supporting barriers;
fifthly, welding lintels at the upper ends of the steel pipe piles arranged in rows;
step six, manufacturing a water stop curtain and a water pressing bag, sewing the water stop curtain and the water pressing bag, and sticking a waterproof adhesive tape at the sewing position;
step seven, manufacturing a cement ball, filling the cement ball into a water pressing bag, and sewing and sticking the bag opening;
step eight, slowly placing the water stop bag and the water stop curtain which are connected together into a riverway riverbed along the steel sheet pile, and firmly embedding the upper end of the water stop curtain into the gap between the upper end of the steel pipe pile and the lintel.
Further, the lower ends of the vertical guide grooves in the row of steel pipe piles are flush and face the same direction.
Furthermore, the both sides face of vertical guide slot has "T" shape channel, horizontal fender is including a fender pole and a fender dop, the both ends of a fender pole all have a fender dop, one two fender dops on a fender pole cooperate respectively on adjacent two vertical guide slots to in the opposite "T" shape channel.
Further, the bottom of the vertical channel is at half the annual average water level at that location.
Further, the manufacturing of the water stop curtain: and bonding the non-woven fabric to isolate the impermeable membrane, sequentially bonding the non-woven fabric in the middle layer and the steel wire grating by using a bonding agent, and then paving a layer of non-woven fabric on the outer side of the steel wire grating.
Furthermore, the surface of the steel sheet pile facing the deep water area is a water retaining surface, and the water stop curtain is arranged on the water retaining surface.
Further, manufacturing of the press-stop steel soil ball: and a small amount of bentonite is mixed into the plastic clay and is uniformly kneaded to form a cake shape, and then the steel balls are wrapped in the cake shape to form a plastic clay bentonite mixed soil layer.
Furthermore, the diameter of the formed pressure water steel-soil ball is 1.5-2.5 times of the diameter of the steel ball, and clay with plasticity index Ip being more than or equal to 25 is selected.
Further, the water pressing bag is made of a high-strength geotextile bag.
The river closure cofferdam with the hardness and softness combined is built through the steps.
The invention has the following beneficial effects:
the rigid surrounding and blocking system consisting of the steel pipe piles, the steel sheet piles and the transverse retaining blocks is high in strength, easy to drive into a hard soil layer, strong in water retaining capacity and good in anti-seepage performance to the bottom of a river channel.
The water-stopping curtain, the water-pressing bag and the water-pressing steel soil ball form a flexible water-pressing system, so that the water seepage of the steel sheet pile at the upper part of the riverbed can be prevented, the water-pressing steel soil ball expands to a certain extent after meeting water, the plastic clay cannot run off from the high-strength geotextile water-pressing bag, the steel ball can ensure that the whole water-pressing bag is tightly pressed on the riverbed of the riverway at any time, and the plastic clay can prevent the water seepage at the bottom of the riverbed.
The transverse supporting stops and the lintel are arranged, so that the rigidity and the strength of the pile plate cofferdam are enhanced, and the construction is convenient for constructors to construct.
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 schematic view of a rigid-flexible parallel-connection river closure cofferdam;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view of the installation of the vertical channel;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic view of a lateral buttress;
FIG. 7 is a schematic view of the installation of the lateral buttress;
FIG. 8 is a schematic view of the installation of the lintel;
FIG. 9 is a schematic structural view of a press-stop steel soil ball;
in the drawings, the components represented by the respective reference numerals are listed below:
1-steel pipe pile; 2-riverbed; 3-lintel; 4-water retaining surface; 5-vertical guide groove; 6-transverse supporting and blocking; 7-water stopping curtain; 8-pressing a water-stopping steel soil ball; 9-pressing the water bag; 10-steel sheet piles; 11-a retaining chuck; 12-stop rod, 13-plastic clay bentonite mixed soil layer and 14-steel ball.
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 "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
The invention does not need to describe the technical requirements of welding between the reinforcing steel bars, concrete pouring key points, rammed earth, pile foundation construction quality standards and the like, and mainly explains the implementation mode of the structure of the invention.
Referring to fig. 1-9, the river closure cofferdam of the invention is a rigid-flexible combined type river closure cofferdam, comprising a row of steel pipe piles 1 with one end inserted into a riverbed 2, wherein a vertical guide slot 5 is arranged at the upper end of each steel pipe pile 1 along the axial direction, a transverse support 6 is matched in two adjacent vertical guide slots 5, and the rows of steel pipe piles 1 are connected through the transverse support 6.
The concrete vertical guide slot 5 is placed towards the upstream face of the steel pipe pile 1, two side faces of the vertical guide slot 5 are provided with T-shaped channels, the transverse supporting baffle 6 comprises a supporting baffle rod 12 and supporting baffle clamping heads 11, the two ends of the supporting baffle rod 12 are provided with the supporting baffle clamping heads 11, and the two supporting baffle clamping heads 11 on the supporting baffle rod 12 are respectively matched in the opposite T-shaped channels on the two adjacent vertical guide slots 5.
A steel sheet pile 10 is also inserted into the river bed 2, and when the steel sheet pile 10 is driven, the steel sheet pile 10 abuts against the steel pipe pile 1.
The outer surface of the transverse supporting barrier 6 is provided with a water stop curtain 7, specifically, the back of the contact surface of the steel sheet pile 10 and the vertical guide groove 5 is used as a water blocking surface 4, and the water stop curtain 7 is arranged on the water blocking surface 4 side of the steel sheet pile 10.
The steel sheet pile 10 is attached to the vertical guide groove 5 or the transverse support 6, and the outer surface of the steel sheet pile 10 is provided with a water stop curtain 7.
The water-stop curtain 7 comprises three layers of non-woven fabrics, and a water-impermeable film and a steel wire grid which are respectively arranged in the interlayer.
Specifically, when the water stop curtain 7 is manufactured, a layer of non-woven fabric is used for isolating the impermeable membrane, then a layer of non-woven fabric and a layer of steel wire grating are added, then a layer of non-woven fabric is laid on the outer side of the steel wire grating, and finally the non-woven fabric and the steel wire grating are adhered together by using an adhesive.
The lower edge of the water stopping curtain 7 is provided with the water pressing bag 9, the total length of the corresponding water stopping bag 9 is manufactured according to the width of the water stopping curtain 7, and the water pressing bag 9 is adhered to the water stopping curtain 7 by adhering a waterproof adhesive tape.
The top end of one row of steel pipe piles 1 is fixed with a lintel 3, wherein when the lintel 3 is installed, the upper edge of a water stop curtain 7 is embedded into a gap between the lintel 3 and the steel pipe pile 1.
Furthermore, a pressure water stopping steel soil ball 8 is arranged in the pressure water bag 9.
The press-sealing water steel soil ball 8 comprises a steel ball 14 and a plastic clay bentonite mixed soil layer 13 covering the surface of the steel ball 14, when the press-sealing water steel soil ball 8 is manufactured, a small amount of bentonite is doped into the plastic clay in advance and is uniformly kneaded to form a cake shape, then the steel ball 14 is covered in the press-sealing water steel soil ball 8, and the diameter of the formed press-sealing water steel soil ball 8 is 1.5-2.5 times of that of the steel ball 14.
The method for constructing the rigid-flexible river closure cofferdam comprises the following steps:
step one, selecting profile steel to manufacture a vertical guide groove 5 and a transverse supporting block 6, and welding and installing the manufactured vertical guide groove 5 on the upper part of a pile body of the steel pipe pile 1.
Wherein, the lower ends of the vertical guide grooves 5 on the row of steel pipe piles 1 are flush and face in the same direction.
And step two, driving the tip end of the steel pipe pile 1 into a construction area to form a row, wherein the vertical guide groove 5 faces to a deep water area, and the bottom of the optimal vertical guide groove 5 is positioned at a half of the annual average water level of the position.
Thirdly, installing a transverse supporting baffle 6, and connecting the vertical guide grooves 5 on two adjacent steel pipe piles 1 through the transverse supporting baffle 6;
specifically, two retaining clip heads 11 on the retaining bar 12 are respectively matched in the opposite T-shaped channels on the two adjacent vertical guide grooves 5 to connect the two vertical guide grooves 5.
Fourthly, driving a steel sheet pile 10 to be close to the transverse supporting baffle 6 to form a rigid enclosing system mainly composed of the steel pipe pile 1, the steel sheet pile 10 and the transverse supporting baffle 6;
and step five, welding lintels 3 on the steel pipe piles 1 which are arranged in rows.
Step six, manufacturing a water stop curtain 7 and a water pressing bag 9, sewing the water stop curtain and the water pressing bag, and sticking a waterproof adhesive tape at the sewing position;
the surface of the steel sheet pile 10 facing the deep water area is a water retaining surface 4, and a water stopping curtain 7 is arranged on the water retaining surface 4.
The specific water stop 7 is manufactured as follows: and bonding the non-woven fabric to isolate the impermeable membrane, sequentially bonding the non-woven fabric in the middle layer and the steel wire grating by using a bonding agent, and then paving a layer of non-woven fabric on the outer side of the steel wire grating.
Wherein, the water pressing bag 9 is made of a high-strength geotextile bag, so that the geotextile bag has certain water permeability.
Seventhly, manufacturing a cement ball 8, placing the cement ball into a water pressing bag 9 in a manner of being close to the cement ball, and then sewing and sticking the opening of the water pressing bag;
the concrete preparation of the pressure water-stopping steel soil ball 8: and a little bentonite is mixed into the plastic clay and is uniformly kneaded to form a cake shape, and then the steel ball 14 is wrapped in the cake shape to form the plastic clay-bentonite mixed soil layer 13.
Furthermore, the diameter of the formed pressure water steel soil ball 8 is 1.5-2.5 times of the diameter of the steel ball 14, and clay with plasticity index Ip being more than or equal to 25 is selected.
Step eight, slowly placing the connected water stopping bag 9 and the water stopping curtain 7 on the riverway riverbed 2 along the steel sheet pile 10, and embedding the upper edge of the water stopping curtain 7 into a gap between the lintel 3 and the steel pipe pile 1.
Wherein, pressing stagnant water steel soil ball 8 to have certain inflation after meeting water, plastic clay can not run off from high strength geotechnological cloth pressure water bag 9, and steel ball 14 can guarantee that whole pressure water bag 9 closely presses on riverway riverbed 2 constantly, and plastic clay can prevent the infiltration of riverbed 2 bottom, forms flexible pressure stagnant water system, combines the rigidity of steel-pipe pile 1, steel sheet pile 10 and horizontal fender 6 constitution to enclose stifled system.
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. A construction method of a rigid-flexible river closure cofferdam is characterized in that the construction method comprises the following steps. The method comprises the following steps:
firstly, selecting profile steel to manufacture a vertical guide groove (5) and a transverse supporting block (6), and welding and installing the manufactured vertical guide groove (5) on the upper part of a pile body of the steel pipe pile (1);
and step two, driving the tip end of the steel pipe pile (1) into a construction area to form a row, wherein the vertical guide groove faces a deep water area.
Thirdly, installing a transverse supporting baffle (6), and connecting the vertical guide grooves (5) on two adjacent steel pipe piles (1) through the transverse supporting baffle (6);
fourthly, driving a steel sheet pile (10) close to the transverse supporting barrier (6) to form a rigid enclosing system mainly composed of the steel pipe pile (1), the steel sheet pile (10) and the transverse supporting barrier (6);
fifthly, welding lintels (3) at the upper ends of the steel pipe piles (1) which are arranged in rows;
step six, manufacturing a water stop curtain (7) and a water pressing bag (9), sewing the water stop curtain and the water pressing bag, and sticking a waterproof adhesive tape at the sewing position;
seventhly, manufacturing a cement ball (8), filling the cement ball into a water pressing bag (9), and sewing and sticking the opening of the bag;
step eight, slowly placing the water stopping bag (9) and the water stopping curtain (7) which are connected together on the riverway riverbed (2) along the steel sheet pile (10), and firmly embedding the upper end of the water stopping curtain (7) into the gap between the upper end of the steel pipe pile (1) and the lintel (3).
2. The construction method of the rigid-flexible parallel-type river closure cofferdam of claim 1, wherein the lower ends of the vertical guide slots (5) on the row of steel pipe piles (1) are flush and have the same orientation.
3. The construction method of the rigid-flexible river closure cofferdam according to claim 1 or 2, characterized in that both side surfaces of the vertical guide grooves (5) are provided with T-shaped channels, the transverse supporting bars (6) comprise supporting bar (12) and supporting bar clamping heads (11), both ends of the supporting bar (12) are provided with supporting bar clamping heads (11), and two supporting bar clamping heads (11) on one supporting bar (12) are respectively matched in the opposite T-shaped channels on two adjacent vertical guide grooves (5).
4. The construction method of the rigid-flexible parallel-type river closure cofferdam of claim 3, wherein the bottom of the vertical guide groove (5) is at half of the annual average water level at the position.
5. The construction method of the rigid-flexible parallel-type river closure cofferdam of claim 1, wherein the manufacture of the water-stop curtain (7) is as follows: and bonding the non-woven fabric to isolate the impermeable membrane, sequentially bonding the non-woven fabric in the middle layer and the steel wire grating by using a bonding agent, and then paving a layer of non-woven fabric on the outer side of the steel wire grating.
6. The construction method of the rigid-flexible parallel-type river closure cofferdam of claim 1, wherein the surface of the steel sheet pile (10) facing the deep water area is a water-retaining surface (4), and the water-retaining curtain (7) is installed on the water-retaining surface (4).
7. The construction method of the rigid-flexible parallel-type river closure cofferdam of claim 1, wherein the manufacturing of the pressure-water steel soil ball (8) comprises the following steps: a little bentonite is mixed into the plastic clay and is uniformly kneaded into a cake shape, and then the steel ball (14) is wrapped in the cake shape to form a plastic clay-bentonite mixed soil layer (13).
8. The construction method of the rigid-flexible parallel-type river closure cofferdam of claim 6, wherein the diameter of the formed pressure-water steel-soil ball (8) is 1.5-2.5 times of the diameter of the steel ball (14), and clay with plasticity index Ip more than or equal to 25 is selected.
9. The construction method of the rigid-flexible parallel-assistance river closure cofferdam of claim 1, wherein the water pressing bag (9) is made of a high-strength geotextile bag.
10. A rigid-flexible river closure cofferdam is characterized by being built through the steps.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564394.9A CN111676991A (en) | 2020-06-19 | 2020-06-19 | Rigid-flexible river closure cofferdam and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010564394.9A CN111676991A (en) | 2020-06-19 | 2020-06-19 | Rigid-flexible river closure cofferdam and construction method thereof |
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Citations (5)
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|---|---|---|---|---|
| JPH11124935A (en) * | 1997-10-22 | 1999-05-11 | Ykk Architectural Products Inc | Projecting unit of curtain wall |
| CN2533155Y (en) * | 2002-02-08 | 2003-01-29 | 杨学海 | Plate dam type secondary dyke |
| CN201132960Y (en) * | 2007-11-05 | 2008-10-15 | 上海勘测设计研究院 | Composite batardeau of steel light structure |
| CN205369276U (en) * | 2016-01-06 | 2016-07-06 | 北京翔鲲水务建设有限公司 | Osmosis membrane cofferdam is prevented to preceding landing leg shaped steel |
| CN206815355U (en) * | 2017-05-24 | 2017-12-29 | 宁波绿茵市政园林股份有限公司 | A kind of river course pile foundation cofferdam |
-
2020
- 2020-06-19 CN CN202010564394.9A patent/CN111676991A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11124935A (en) * | 1997-10-22 | 1999-05-11 | Ykk Architectural Products Inc | Projecting unit of curtain wall |
| CN2533155Y (en) * | 2002-02-08 | 2003-01-29 | 杨学海 | Plate dam type secondary dyke |
| CN201132960Y (en) * | 2007-11-05 | 2008-10-15 | 上海勘测设计研究院 | Composite batardeau of steel light structure |
| CN205369276U (en) * | 2016-01-06 | 2016-07-06 | 北京翔鲲水务建设有限公司 | Osmosis membrane cofferdam is prevented to preceding landing leg shaped steel |
| CN206815355U (en) * | 2017-05-24 | 2017-12-29 | 宁波绿茵市政园林股份有限公司 | A kind of river course pile foundation cofferdam |
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Application publication date: 20200918 |