CN104234064A - Bridge pier cofferdam reinforcing structure and constructing method thereof - Google Patents
Bridge pier cofferdam reinforcing structure and constructing method thereof Download PDFInfo
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- CN104234064A CN104234064A CN201410519797.6A CN201410519797A CN104234064A CN 104234064 A CN104234064 A CN 104234064A CN 201410519797 A CN201410519797 A CN 201410519797A CN 104234064 A CN104234064 A CN 104234064A
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Abstract
The invention discloses a bridge pier cofferdam reinforcing structure. The bridge pier cofferdam reinforcing structure comprises cofferdams (19), wherein each cofferdam (19) is defined by a plurality of steel sheets (5) of an arc-shaped structure in a connected mode or defined by a plurality of steel sheets (5) of an arc-shaped structure and a plurality of steel sheets (20) of a cuboid structure in a connected mode. The bridge pier cofferdam reinforcing structure is convenient to disassemble and assemble and flexible to convey, after one cofferdam is reinforced and disassembled, the cofferdam can be directly hauled to another construction site for use, and therefore the equipment utilization rate is increased.
Description
Technical field
The invention belongs to technical field of bridge engineering, be specifically related to a kind of bridge pier cofferdam ruggedized construction and construction method thereof.
Background technology
Cofferdam refers in hydraulic engineering construction, for building permanent water conservancy projects, and the provisional space enclosing structure of building.Its effect be prevent water and soil from entering building build position so that at cofferdam internal drainage, excavation pit, builds building.Generally be mainly used in hydraulic architecture, except the part as formal building, cofferdam is generally removed after being finished.Cofferdam height is higher than the peak level that may occur in the construction period.
Steel sheet-pile cofferdam is the most frequently used a kind of sheet pile cofferdam.Steel sheet pile is a kind of shaped steel with fore shaft, and there are straight plate shape, flute profile and Z-shaped etc. in its cross section, has full range of sizes and interlocking form.Common are and draw Ademilson formula, clarke Wan Nashi etc.Its advantage is: intensity is high, easily squeezes into hard soil layer; Can at dark subaqueous work, water resistance is good; The cofferdam of various profile can be formed on demand, and can repeatedly use, therefore, it of many uses.The cofferdam on open caisson top is usually used in, the cofferdam etc. of cylinder pile foundation, pile foundation and open cut foundation in bridge construction.Have vertical cross binding in these closed cofferdam of many employings single wall, cofferdam, adding bearing diagonal if desired becomes an inclosure.As the cylinder pile foundation of Nanjing of China the Changjiang river bridge, once used steel sheet pile circular cofferdam, its diameter 21.9 meters, long 36 meters of steel sheet pile, after underwater concrete back cover reaches requirement of strength, draw water and build cushion cap and pier shaft, projected depth of drawing water reaches 20 meters.In hydraulic architecture, general construction area is very large, then conventional to make structure body cofferdam.It is be made up of many monomers be connected to each other, and each monomer is made up of many steel sheet piles again, and monomer centre soil tamps.The scope that cofferdam is gone along with sb. to guard him is very large, and can not support weir wall with supporting, therefore each monomer can resist alone the drawing crack toppling, slide and prevent interlocking place.Conventional has the form such as circle and next door shape.
Steel sheet-pile cofferdam is applied more in China's construction, but its construction is extensive, and cost haggles over height, and also tamp with soil between steel sheet pile composition, such duration is longer, needs water pump ceaselessly to draw water in inside, cofferdam, and such operation is very trouble.
Secondly, if a patent No. is 201310014306.8, the applying date 2012. 07 .55, a kind of circular cofferdam is disclosed in the Chinese utility model patent of notification number CN202706045U, comprise the one group of steel sheet pile and cofferdam substrate that are enclosed in cushion cap periphery, it is characterized in that: described steel sheet pile is arranged to tubular cofferdam wall along cushion cap circumferential annular, the root of described steel sheet pile extends to below cofferdam substrate, and the top of steel sheet pile is higher than cushion cap; The inside wall being close to this group steel sheet pile is provided with and encloses purlin, described in enclose purlin along wall border, cofferdam from top to bottom successively interval be circular layout; Described first enclose purlin and the 3rd road enclose purlin place respectively disk in be also provided with the inner support be fixedly connected with cofferdam inwall, described inner support is the rectangular frame that encloses of steel pipe and itself and cofferdam substrate are arranged in parallel.
And for example a patent No. is CN201120427362.0, the applying date 2011. 11 .02, a kind of steel sheet pile cofferdam structure is disclosed in the Chinese utility model patent of notification number CN202359565U, be made up of steel sheet pile and weir, cofferdam body, it is characterized in that: described steel sheet pile is single, be arranged at body side near water, weir, cofferdam; Weir, described cofferdam body is filled by rock structure and forms.
Summary of the invention
The present invention is directed to above shortcoming, based on solution existing bridge pier, the particularly degree of depth comparatively underwater foundation in ocean, deep-sea, cofferdam sealing low there will be, leaks, and affects greatly by geology under water, construct extensive, cost is high, problem long in time limit.Devise a kind of bridge pier cofferdam ruggedized construction and construction method thereof.This cofferdam ruggedized construction and construction method thereof are by rational syndeton and install flexible rubber additional, and ensure that the sealing of single unit system, the construction period is short, and little by actual effect of natural conditions, cost is low.
For realizing object of the present invention, the technical solution used in the present invention is:
A kind of bridge pier cofferdam ruggedized construction, comprises and connects by multiple arc structure steel disc the cofferdam/that surrounds or multiple arc structure steel disc is connected with rectangular structure steel disc the cofferdam surrounded.
The top of above-mentioned arc structure steel disc/or rectangular structure steel disc is notch cuttype convex configuration, and bottom is the notch cuttype concave configuration matched with top step type; Side is trapezoidal rails, and opposite side is the dovetail groove matched with trapezoidal rails.
In addition, when multiple cofferdam connects, in order to ensure arc structure steel disc/or rectangular structure steel disc described in both sealing outside above and below be staggeredly provided with suspension ring.
Preferentially, it is interference fits between dovetail groove and trapezoidal rails, wherein: above dovetail groove, be also wound with raw material band, which increase sealing, adopt matched in clearance to there will be the not strong problem of sealing, adopt interference fit to there will be the problem of splicing difficulty, therefore interference fits and raw material band is adopted jointly to use, namely can Fast Installation, sealing might as well, there will not be water leakage situation.
Based on said apparatus, the invention allows for a kind of bridge pier cofferdam ruggedized construction construction method, comprise the following steps,
(1) by multiple scattered arc structure steel disc/or multiple arc structure steel disc and rectangular structure steel disc and build construction tool and be transported to by bridge pier to be onstructed, remove the foreign material above bridge pier base, delivery vehicle uses boats and ships, builds construction tool as scaffold, crane etc.;
(2) set up two operation platforms up and down in bridge pier surrounding, lower operation platform distance water surface 1.5-2 rice, between two operation platforms, spacing 2-3 rice is guaranteed higher than human height, and be convenient to staff's work, two operation platform area radiuses are identical;
(3) lifting appliance is utilized to be transported on two operation platforms by multiple arc structure steel disc/or multiple arc structure steel disc and rectangular structure steel disc, and according to the depth calculation buoyancy of water in waters, and the weight determining mutually to superpose cofferdam can be greater than the number of plies required for bridge pier base buoyancy;
(4) start arc structure steel disc/or multiple arc structure steel disc and rectangular structure steel disc to be spliced to form cofferdam fast on operation platform simultaneously, neighbouring cofferdam to be connected between the suspension ring on adjacent cofferdam fixing by securing member, in splicing on dovetail groove around on raw material band;
After multiple cofferdam splicing above (5) two operation platforms is connected and fixed, first the operation platform being positioned at top is removed, hang under the cofferdam utilizing loop wheel machine operation in the operation platform of top to be completed and be connected and fixed with below operation platform, the number of plies in cofferdam is increased, guarantee that the height in cofferdam surfaces 1-1.5 rice position, cofferdam will be caused to be flooded by the impact of river level change like this;
(6) by adhesive waterproof tape, elastic tape is fixed on the bottom end face in the multilayer cofferdam that step (5) completes, elastic layer is produced like this at bottommost, even if the out-of-flatness of bridge pier substrate surface, by the pressure of whole device and the elastic force of elastic tape, make the sealed bottom of device;
(7) operation platform being positioned at below is removed, winch under the multilayer cofferdam utilizing loop wheel machine step (6) to be completed is slow and contact with bridge pier base, and utilize submarine mechanical to knock multilayer cofferdam to make it press to wear the silt be not cleaned of deposition and touch bridge pier base, thus reach the sealing of bottom;
(8) utilize water plug to start to start to draw water to inside multilayer cofferdam, in pump process constructor between bridge pier and cofferdam from top to bottom uniform installation jack bracing means make the even fixed cover in cofferdam peripheral at bridge pier.
(9), after having drawn water inside cofferdam, user of service checks that inner side is with or without large-scale water leakage situation, and takes corresponding measures of preventing water, until inside there will not be large area to go out to leak, constructor starts to overhaul bridge pier, the constructions such as reinforcing;
(10) after operation completes, utilize loop wheel machine that cofferdam is hung out the water surface, and dismantle, packing is transported, and continues next time to use.
Preferentially, can fast by below device after steel cofferdam is put up, the radius of step (2) interior operation platform is greater than the radius will assembling steel cofferdam.
Preferentially, in some deep water areas, Underwater Pressure is large, and the sealing between connecting up and down in order to ensure device, can also be lined with elastic tape between the cofferdam that step (4) is neighbouring.
Compared with prior art, advantage of the present invention is as follows:
(1) on-site consolidation being divided in cofferdam multiple fritter to transport, low to delivery technical requirements, difficulty is little, adopt two operation platforms to build simultaneously simultaneously, time that holistic conformation completes and adopt and overall tow scene to carry out adjusting the time used of locating substantially identical, therefore possesses time saving advantage in background technology;
(2) in splicing, bottom and each stitching portion all have employed seal approach, make after having drawn water, seldom occur the generation of drainage;
(3) affect less by nature and field condition, no matter the depth of water is how many, height can be increased at any time, and two kinds of methods in background technology are too inflexible, increased heights is again difficult to after scene, once there is flood tide and in installation process because the pressure of itself weight makes it sink to submerging in water, now just very difficult at the height increasing cofferdam;
(4) dismounting aspect, transports freely, directly can haul another job site and carry out in use, the utilization rate of the equipment increased like this after a cofferdam has reinforced dismounting.
Accompanying drawing explanation
The following accompanying drawing by means of embodiment carries out brief description to the present invention now.In accompanying drawing:
Fig. 1 shows the structural representation of bridge pier cofferdam of the present invention ruggedized construction;
Fig. 2 shows the front view of bridge pier cofferdam of the present invention ruggedized construction;
Fig. 3 shows the upward view of bridge pier cofferdam of the present invention ruggedized construction;
Fig. 4 shows the structural representation of arc structure steel disc of the present invention;
Fig. 5 shows the top view of arc structure steel disc of the present invention;
Fig. 6 shows the top view of rectangular structure steel disc of the present invention;
Fig. 7 shows schematic diagram when the present invention constructs.
In figure: 1, dovetail groove, 5, arc structure steel disc, 6, trapezoidal rails, 7, securing member, 8, suspension ring, 10, jack bracing means, 11, boats and ships, 12, platform, 13, lifting appliance, 14, bridge pier, 16, operation platform, 18, bridge pier base, 19, cofferdam, 20, rectangular structure steel disc.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Embodiment 1
A kind of bridge pier cofferdam ruggedized construction, multiple arc structure steel disc 5 is connected the cofferdam 19 surrounded with rectangular structure steel disc 20.The top of arc structure steel disc 5 is notch cuttype convex configuration, and bottom is the notch cuttype concave configuration matched with top step type; Side is trapezoidal rails 6, and opposite side is the dovetail groove 1 matched with trapezoidal rails 6.
The top of rectangular structure steel disc 20 is notch cuttype convex configuration, and bottom is the notch cuttype concave configuration matched with top step type; Side is trapezoidal rails 6, and opposite side is the dovetail groove 1 matched with trapezoidal rails 6.
In addition, interlock and be provided with suspension ring 8 above and below the outside of rectangular structure steel disc 20, also interlocking above and below the outside of arc structure steel disc 5 is provided with suspension ring 8.Be interference fits between dovetail groove 1 and trapezoidal rails 6, wherein: dovetail groove 1 is also wound with raw material band above.
Above-mentioned this kind of structure is the construction method of rectangle bridge pier, this kind of structure based on the shape of bridge pier, comprises the following steps,
(1) by multiple scattered multiple arc structure steel discs 5 and rectangular structure steel disc 20 and builds construction tool and be transported to by bridge pier to be onstructed by boats and ships 11, by manually descending the foreign material above water removing bridge pier base 18;
(2) set up two operation platforms 16 up and down in bridge pier surrounding, the lower operation platform distance water surface 1.5 meters, spacing 2 meters between two operation platforms 16, the radius of operation platform 16 is greater than the radius will assembling steel cofferdam 19;
(3) utilizing lifting appliance 13 to be coordinated with rectangular structure steel disc 20 by multiple arc structure steel disc 5 is transported on two operation platforms 16 jointly, and calculate buoyancy of water according to the deep exploitation Archimedes buoyancy design formulas in waters, and the weight determining mutually to superpose cofferdam 19 can be greater than the number of plies required for bridge pier base 18 buoyancy;
(4) start scattered multiple arc structure steel discs 5 to be spliced to form cofferdam 19 fast with rectangular structure steel disc 20 on operation platform 16 simultaneously, neighbouring cofferdam 19 is connected between the suspension ring 8 on adjacent cofferdam 19 fixing by securing member 7, can also elastic tape be lined with between neighbouring cofferdam 19, in splicing on dovetail groove 1 around on raw material band;
After multiple cofferdam 19 splicing above (5) two operation platforms 16 is connected and fixed, first the operation platform 16 being positioned at top is removed, the cofferdam utilizing loop wheel machine operation in top operation platform 16 to be completed is hung for 19 times and is connected and fixed with below operation platform 16, the number of plies in cofferdam 19 is increased, guarantees that the height in cofferdam 19 surfaces 1 meter of position;
(6) by adhesive waterproof tape, elastic tape is fixed on the bottom end face in the multilayer cofferdam 19 that step 5 completes;
(7) operation platform 16 being positioned at below is removed, winch under the multilayer cofferdam 19 utilizing loop wheel machine step 6 to be completed is slow and contact with bridge pier base 18, and utilize the crane jog above boats and ships to knock multilayer cofferdam 19 to make it press to wear the silt of deposition and touch bridge pier base 18, thus reach the sealing of bottom;
(8) water plug is utilized to start to start to draw water to inside multilayer cofferdam 19, constructor's uniform installation jack bracing means 10 from top to bottom between bridge pier 14 and cofferdam 19 in pump process.
(9), after having drawn water inside cofferdam 19, user of service checks that inner side is with or without large-scale water leakage situation, and takes corresponding measures of preventing water, until inside there will not be large area to go out to leak, constructor starts to overhaul bridge pier 14, the constructions such as reinforcing;
(10), after operation completes, utilize loop wheel machine that cofferdam 19 is hung out the water surface, and dismantle, packing is transported.
Embodiment 2
A kind of bridge pier cofferdam ruggedized construction, comprises and connects by multiple arc structure steel disc 5 cofferdam 19 surrounded.The top of arc structure steel disc 5 is notch cuttype convex configuration, and bottom is the notch cuttype concave configuration matched with top step type; Side is trapezoidal rails 6, and opposite side is the dovetail groove 1 matched with trapezoidal rails 6.
In addition, staggeredly above and below the outside of arc structure steel disc 5 suspension ring 8 are provided with.Be interference fits between dovetail groove 1 and trapezoidal rails 6, wherein: dovetail groove 1 is also wound with raw material band above.
Above-mentioned this kind of structure is Cylindrical Pier and square bridge pier based on the shape of bridge pier, and the construction method of this kind of structure, comprises the following steps,
(1) multiple scattered multiple arc structure steel disc 5 and construction construction tool are transported to by bridge pier to be onstructed by boats and ships 11, by manually descending the foreign material above water removing bridge pier base 18;
(2) set up two operation platforms 16 up and down in bridge pier surrounding, the lower operation platform distance water surface 2 meters, spacing 2 meters between two operation platforms 16, the radius of operation platform 16 is greater than the radius will assembling steel cofferdam 19;
(3) lifting appliance 13 is utilized to be transported on two operation platforms 16 by multiple arc structure steel disc 5, and calculate buoyancy of water according to the deep exploitation Archimedes buoyancy design formulas in waters, and the weight determining mutually to superpose cofferdam 19 can be greater than the number of plies required for bridge pier base 18 buoyancy;
(4) start on operation platform 16, scattered multiple arc structure steel discs 5 are spliced to form fast circular cofferdam 19 simultaneously, neighbouring cofferdam 19 is connected between the suspension ring 8 on adjacent cofferdam 19 fixing by securing member 7, can also elastic tape be lined with between neighbouring cofferdam 19, in splicing on dovetail groove 1 around on raw material band;
After multiple cofferdam 19 splicing above (5) two operation platforms 16 is connected and fixed, first the operation platform 16 being positioned at top is removed, the cofferdam utilizing loop wheel machine operation in top operation platform 16 to be completed is hung for 19 times and is connected and fixed with below operation platform 16, the number of plies in cofferdam 19 is increased, guarantees that the height in cofferdam 19 surfaces 1 meter of position;
(6) by adhesive waterproof tape, elastic tape is fixed on the bottom end face in the multilayer cofferdam 19 that step 5 completes;
(7) operation platform 16 being positioned at below is removed, winch under the multilayer cofferdam 19 utilizing loop wheel machine step 6 to be completed is slow and contact with bridge pier base 18, and utilize the crane jog above boats and ships to knock multilayer cofferdam 19 to make it press to wear the silt of deposition and touch bridge pier base 18, thus reach the sealing of bottom;
(8) water plug is utilized to start to start to draw water to inside multilayer cofferdam 19, constructor's uniform installation jack bracing means 10 from top to bottom between bridge pier 14 and cofferdam 19 in pump process.
(9), after having drawn water inside cofferdam 19, user of service checks that inner side is with or without large-scale water leakage situation, and takes corresponding measures of preventing water, until inside there will not be large area to go out to leak, constructor starts to overhaul bridge pier 14, the constructions such as reinforcing;
(10), after operation completes, utilize loop wheel machine that cofferdam 19 is hung out the water surface, and dismantle, packing is transported.
Claims (7)
1. a bridge pier cofferdam ruggedized construction, is characterized in that: comprise the cofferdam (19)/that surrounded by multiple arc structure steel disc (5) connection or multiple arc structure steel disc (5) is connected the cofferdam (19) surrounded with rectangular structure steel disc (20).
2. bridge pier cofferdam according to claim 1 ruggedized construction, it is characterized in that, the top of described arc structure steel disc (5)/or rectangular structure steel disc (20) is notch cuttype convex configuration, and bottom is the notch cuttype concave configuration matched with top step type; Side is trapezoidal rails (6), and opposite side is the dovetail groove (1) matched with trapezoidal rails (6).
3. bridge pier cofferdam according to claim 1 and 2 ruggedized construction, is characterized in that, interlocking above and below the outside of described arc structure steel disc (5)/or rectangular structure steel disc (20) is provided with suspension ring (8).
4. bridge pier cofferdam according to claim 1 ruggedized construction, is characterized in that, is interference fits between described dovetail groove (1) and trapezoidal rails (6), wherein: dovetail groove (1) is also wound with raw material band above.
5. a bridge pier cofferdam ruggedized construction construction method, comprises the following steps,
(1) by multiple scattered arc structure steel disc (5)/or multiple arc structure steel disc (5) and rectangular structure steel disc (20) and builds construction tool and be transported to by bridge pier to be onstructed, the foreign material above removing bridge pier base (18);
(2) two operation platforms (16) are set up up and down in bridge pier surrounding, lower operation platform distance water surface 1.5-2 rice, spacing 2-3 rice between two operation platforms (16);
(3) lifting appliance (13) is utilized to be transported on two operation platforms (16) by multiple arc structure steel disc (5)/or multiple arc structure steel disc (5) with rectangular structure steel disc (20), and according to the depth calculation buoyancy of water in waters, and the weight determining mutually to superpose cofferdam (19) can be greater than the number of plies required for bridge pier base (18) buoyancy;
(4) start arc structure steel disc (5)/or multiple arc structure steel disc (5) to be spliced to form cofferdam (19) fast with rectangular structure steel disc (20) on operation platform (16) simultaneously, neighbouring cofferdam (19) to be connected between the suspension ring (8) on adjacent cofferdam (19) fixing by securing member (7), in splicing on dovetail groove (1) around upper raw material band;
After multiple cofferdam (19) splicing above (5) two operation platforms (16) is connected and fixed, first the operation platform (16) being positioned at top is removed, hang under the cofferdam (19) utilizing loop wheel machine top operation platform (16) interior operation to be completed and be connected and fixed with below operation platform (16), the number of plies in cofferdam (19) is increased, guarantees that the height in cofferdam (19) surfaces 1-2 rice position;
(6) by adhesive waterproof tape, elastic tape is fixed on the bottom end face in the multilayer cofferdam (19) that step (5) completes;
(7) operation platform (16) being positioned at below is removed, winch under the multilayer cofferdam (19) utilizing loop wheel machine step (6) to be completed is slow and contact with bridge pier base (18), and utilize submarine mechanical to knock multilayer cofferdam (19) to make it press to wear the silt of deposition and touch bridge pier base (18), thus reach the sealing of bottom;
(8) water plug is utilized to start to start to draw water to multilayer cofferdam (19) inner side, constructor's uniform installation jack bracing means (10) from top to bottom between bridge pier (14) and cofferdam (19) in pump process;
(9) after drawn water in cofferdam (19) inner side, user of service checks that inner side is with or without large-scale water leakage situation, and takes corresponding measures of preventing water, until inside there will not be large area to go out to leak, constructor starts to overhaul bridge pier (14), the constructions such as reinforcing;
(10) after operation completes, utilize loop wheel machine that cofferdam (19) are hung out the water surface, and dismantle, packing is transported, and continues next time to use.
6. method according to claim 5, is characterized in that, the radius of described step (2) interior operation platform (16) is greater than the radius will assembling steel cofferdam (19).
7. method according to claim 5, is characterized in that, can also be lined with elastic tape between the cofferdam (19) that described step (4) is neighbouring.
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| CN106522234A (en) * | 2016-11-29 | 2017-03-22 | 中交四航局第二工程有限公司 | Underwater grouting template structure with increased cylinder section and construction method thereof |
| CN113718807A (en) * | 2021-09-03 | 2021-11-30 | 安徽省公路桥梁工程有限公司 | Combined steel cofferdam structure with adjustable bottom and construction method thereof |
| CN113774817A (en) * | 2021-09-15 | 2021-12-10 | 舟山长宏国际船舶修造有限公司 | Assembled highway bridge rapid construction equipment |
| TWI765776B (en) * | 2021-07-12 | 2022-05-21 | 李嘉峻 | Circular water injection cleaning and cofferdam construction methods |
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| CN113774817A (en) * | 2021-09-15 | 2021-12-10 | 舟山长宏国际船舶修造有限公司 | Assembled highway bridge rapid construction equipment |
| CN113774817B (en) * | 2021-09-15 | 2023-02-28 | 舟山长宏国际船舶修造有限公司 | Assembled highway bridge rapid construction equipment |
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|---|---|
| CN104234064B (en) | 2016-01-20 |
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