CN102140801A - Cofferdam construction method in construction of deepwater pier bearing platform - Google Patents
Cofferdam construction method in construction of deepwater pier bearing platform Download PDFInfo
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- CN102140801A CN102140801A CN2010103010702A CN201010301070A CN102140801A CN 102140801 A CN102140801 A CN 102140801A CN 2010103010702 A CN2010103010702 A CN 2010103010702A CN 201010301070 A CN201010301070 A CN 201010301070A CN 102140801 A CN102140801 A CN 102140801A
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Abstract
The invention relates to the technical field of construction of an underwater pier bearing platform for a large-sized bridge, in particular to a cofferdam construction method in construction of a deepwater pier bearing platform. The invention is characterized in that the deepwater pier bearing platform at least comprises a cofferdam bottom plate, a pile foundation protecting barrel, a cofferdam wall plate, enclosing purlins and an inner support, wherein the cofferdam wall plate is a steel-pipe cofferdam which is formed by connecting steel-pipe wall plate units; the steel-pipe wall plate units are fixed on the enclosing purlins one by one and connected with the cofferdam bottom plate to form a space body with the space height formed by the bottom area of the cofferdam bottom plate and the steel-pipe wall plates; the inner support is connected with the enclosing purlins longitudinally and horizontally to form a main support formed and is connected and combined with a slope, so that each steel-pipe wall plate unit, the cofferdam bottom plate and the inner support together form an upper-and-down reticular structure; the bottoms of steel pipes of the steel-pipe wall plates are sealed so that the whole deepwater pier bearing platform can be accurately regulated to the required height through regulating the water level in the steel pipes; therefore, the construction of the pile foundation protecting barrel is carried out. The cofferdam construction method is economical and effective and has low requirement on construction machinery and simple and convenient construction process.
Description
Technical field
The present invention relates to pier bearing platform construction technical field in the large bridge water, be adapted to especially enclose the water-bound design and construction in the long-span bridge beam superelevation Sarasota deep water pier bearing platform construction, is cofferdam construction method in a kind of deep water pier bearing platform construction exactly.
Background technology
Build a kind of trend that the long-span bridge beam has become bridge construction between great river, straits, bridge type is arranged and is all had main pier in the water usually, and the multi-column pier foundation highrise pile cap is widely used especially in the water.The cofferdam is as the water-bound that encloses of underwater support table, and the pile foundation construction later stage installs, and treats to draw water after the back cover, for bearing platform construction provides " dried environment ".
It is varied that domestic and international large-scale cushion cap encloses the water-bound scheme, having of comparative maturity is following several: steel cofferdam of the no end (as army's mountain bridge etc.), end steel suspended box cofferdam (as white sand continent, Wuhan bridge, the logical bridge of Soviet Union etc.) is arranged, steel sheet-pile cofferdam (as Huangpu bridge) more than encloses water-bound and adopts steel plate as the cofferdam wall panel structure more.The scope of application and the pluses and minuses of several steel cofferdams show: steel suspended box cofferdam of the no end generally is applicable to the phytal zone, the bearing platform construction that the riverbed absolute altitude is higher relatively; Will utilize large-scale floating crane to carry out lifting waterborne, location in construction, construction organization requires high, and later stage back cover, scour protection engineering are bigger; Steel sheet-pile cofferdam can be inserted synchronously in the pile foundation construction later stage and beat, can save the duration, and construction material can have enough to meet the need, equipment is less demanding, but riverbed undulating, the levelling workload is bigger, and because there is inside and outside head difference in the cofferdam, the sealing difficulty is big between the steel sheet pile; Usually need to be provided with the more powerful purlin that encloses and reach interior the support as supporting.End steel suspended box cofferdam is arranged, generally be adapted to the profundal zone bearing platform construction; Do not have scour protection work in the work progress, back cover concrete quality can guarantee, but steel using amount is bigger relatively, and generally needs large-scale floating crane integral hoisting operation waterborne.
In sum, it is commonplace that the large-scale bearing platform construction in profundal zone has end steel cofferdam to use, but traditional have end steel cofferdam to have all generally that construction cost height, machinery have high input, the demanding present situation of construction organization.
Summary of the invention
The purpose of this invention is to provide a kind of more economical and effective and, construction technology less demanding cofferdam construction method in the deep water pier bearing platform construction simply and easily to construction machinery.
The objective of the invention is to realize: cofferdam construction method in a kind of deep water pier bearing platform construction by following design and technical scheme, it is characterized in that: which comprises at least cofferdam base plate, pile foundation casing, cofferdam wallboard, enclose purlin, interior support, the cofferdam wallboard is the steel pipe cofferdam, and the steel pipe cofferdam is connected and composed by steel pipe wallboard unit; Steel pipe wallboard unit is fixed on one by one and encloses on the purlin, and is connected with the cofferdam base plate, and forming by cofferdam base plate floor space and steel pipe wallboard is the space body of spatial altitude; In support with longitudinal and transverse with enclose purlin and be connected to main the support, be linked to be with the inclined-plane and combine, make the common net structure body up and down that forms of steel pipe wallboard unit, cofferdam base plate and interior support one by one, the steel pipe bottom sealing of steel pipe wallboard unit, make integral body accurately be adjusted to required height, carry out the construction of pile foundation casing by the water level of regulating in the steel pipe.
Described steel pipe cofferdam is connected and composed by steel pipe wallboard unit.
Described steel pipe wallboard unit is by angle steel and stiffener and 2 fixing steel pipe row shape bodies that form of steel pipe welding; Two stiffeners are welded to connect two steel pipes respectively up and down, and two stiffener inboards connect an angle steel respectively, and angle steel is welded to connect with two steel pipes again; The outside of two steel pipes is connecting angle more up and down, and outboard angle has fixing bolt.
Described steel pipe wallboard unit is by angle steel and stiffener and 3 fixing steel pipe row shape bodies that form of steel pipe welding; Two stiffeners are welded to connect the position up and down at two steel pipes respectively up and down, and two stiffener inboards connect an angle steel respectively, and angle steel is welded to connect with two steel pipes again; The outside of two steel pipes is connecting angle more up and down, and outboard angle has fixing bolt.
Diameter of steel tube in the described steel pipe wallboard unit is between 1.0～2.0m.
Of the present invention have a following remarkable advantage:
(1) can make full use of bridge construction project self material stock, reduce the material purchase cost.
(2) the cofferdam wallboard with two, three steel pipes as a unit, process relatively fairly simple, and be convenient to the transportation (need not barge container).
(3) the steel pipe cofferdam can adopt small-sized crane barge or other crane gears to carry out assembly unit by the unit, has saved the construction cost that large-scale floating crane drops into.
(4) the wallboard steel tubular structure that adopts in cofferdam itself has that rigidity is big, advantages of high strength, has increased the security reliability in cofferdam.
(5) wallboard steel pipe in cofferdam adopts the structure of bottom lock, has the advantages that can float certainly after the entry, and the later stage can add heavy under water, is easy to control.
(6) the cofferdam wallboard can carry out assembly unit synchronously in pile foundation construction later stage and pile foundation construction, has the clear superiority of saving the duration.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is an embodiment of the invention structural representation;
Fig. 3 is a steel pipe wallboard unit example structure schematic diagram;
Fig. 2-1 is a job engineering schematic diagram in this embodiment step 1);
Fig. 2-2 is this embodiment step 2) middle job engineering schematic diagram;
Fig. 2-3 is a job engineering schematic diagram in this embodiment step 3);
Fig. 2-4 is a job engineering schematic diagram in this embodiment step 4);
Fig. 2-5 is a job engineering schematic diagram in this embodiment step 5);
Fig. 2-6 is a job engineering schematic diagram in this embodiment step 6).
Among the figure: 1, cofferdam base plate; 2, pile foundation casing; 3, cofferdam wallboard; 4, enclose purlin; 5, interior support; 6, steel pipe; 7, small-sized crane barge; 8, bolt; 9, angle steel; 10, stiffener; 11, construction bridge; 12, construction pier position; 13, transfer water level; 14, drilling platform; 15, cofferdam navigation system; 16, following anchor point.
The specific embodiment
As shown in Figure 1, cofferdam construction method in a kind of deep water pier bearing platform construction which comprises at least cofferdam base plate 1, pile foundation casing 2, cofferdam wallboard 3, encloses purlin 4, interior support 5, and cofferdam wallboard 3 is the steel pipe cofferdam, and the steel pipe cofferdam is connected and composed by steel pipe wallboard unit; Steel pipe wallboard unit is fixed on one by one and encloses on the purlin 4, and be connected with cofferdam base plate 1, formation is the space body of spatial altitude by cofferdam base plate 1 floor space and steel pipe wallboard, in support 5 with longitudinal and transverse with enclose purlin 4 and be connected to main the support, be linked to be with the inclined-plane and combine, make each steel pipe wallboard unit, cofferdam base plate 1 and the interior support 5 common net structure bodies up and down that form, the steel pipe 6 bottoms sealing of tube wall plate unit, make integral body accurately be adjusted to required height, carry out the construction of pile foundation casing 2 by the water level of regulating in the steel pipe.
As shown in Figure 3, steel pipe wallboard unit can be by angle steel 9 and stiffener 10 and 2 fixing steel pipe row shape bodies that form of steel pipe welding.Two stiffeners 10 are welded to connect 6, two stiffener 10 inboards of two steel pipes respectively and connect an angle steel 9 respectively up and down, and angle steel 9 is welded to connect with two steel pipes 6 again.The outside of two steel pipes 6 is connecting angle 9 more up and down, and outboard angle 9 has fixing bolt 8.The A place is the stiffening rib position.
Steel pipe wallboard unit also can be by angle steel 9 and stiffener 10 and 3 fixing steel pipe row shape bodies that form of steel pipe welding.Two stiffeners 10 are welded to connect the position up and down at two steel pipes 6 respectively up and down, and two stiffener 10 inboards connect an angle steel 9 respectively, and angle steel 9 is welded to connect with two steel pipes 6 again.The outside of two steel pipes 6 in the outside is connecting angle 9 more up and down, and outboard angle 9 has fixing bolt 8.Diameter of steel tube in the steel pipe wallboard unit is between 1.0～2.0m.
Its concrete implementation step following (is example with the rectangle cushion cap):
1) see accompanying drawing 2-1, wallboard unit, cofferdam (2 steel pipe wallboard unit or 3 steel pipe wallboard unit that steel pipe constitutes that steel pipe constitutes) after the processing district machines, are transported to construction pier position 12, are undertaken spacing by construction bridge 11; Adopt small-sized crane barge 7 to carry out assembly unit, effectively connect by bolt 8 between each unit, wherein underwater portion connects and can be finished by the dirver.
2) see accompanying drawing 2-2, on the peripheral pile foundation casing 2 place system under the cofferdam is set near the cofferdam at pile foundation construction, making the cofferdam enclose purlin 4 by place system under the cofferdam transfers water level 13 in setting and effectively connects (general fining twisted steel lifting mode more commonly used), whole cofferdam is in from floating state (preparation is transferred).
3) see accompanying drawing 2-3, cofferdam bottom board system and base plate lifting system are installed on the water surface, prepare cofferdam base plate 1 and transfer.
4) see accompanying drawing 2-4, utilize under the cofferdam place system under the place system and base plate, jack is transferred cofferdam and cofferdam base plate 1 synchronously, guarantees each suspension centre synchronism.The cofferdam is transferred in the process and add suitable quantity of water in the steel pipe wallboard, makes that place system is in little stress all the time under the cofferdam.
5) see accompanying drawing 2-5, after cofferdam and bottom board system are transferred and put in place, utilize cofferdam navigation system 15 that it is locked, and send the diver that effective shutoff is carried out in slit between cofferdam base plate and steel casing, cofferdam base plate and the cofferdam wallboard.
6) see accompanying drawing 2-6, after the base plate shutoff is finished, just can carry out bottom concrete and build.
So far, finish cofferdam construction.
Cofferdam bottom board system: adopt shaped steel to add the form of structure of panel (checkered steel plate), handle according to cofferdam inner cavity size size and at pile foundation casing 2 places' preformed holes (can utilize early stage drilling platform 14 change).
Enclose the purlin support system: enclose purlin system and interior support 4 general heavy section steel and the steel pipe processing and fabricatings of adopting, mainly the steel pipe wallboard is effectively supported, make its one-tenth as a whole, more effectively resist the lateral pressure that the cofferdam head difference produces.
The cofferdam navigation system: general using pile foundation casing 2 and peripheral construction bridge 11 steel posts, treat the cofferdam transfer put in place after, positioning beam (heavy section steel) is set is locked.
The cofferdam caging system: generally adopt rubber to protect string, be arranged in around the inboard, cofferdam, corresponding with pile foundation casing 2, big off normal does not take place in the process to guarantee that the cofferdam is transferred.
Place system under the cofferdam: the sharp pile foundation casing 2 of place system is provided with brace summer, diagonal brace, reaction beam, finish rolling deformed bar, following suspension centre etc. under the cofferdam, mainly is responsible for transferring of later stage cofferdam.
Cofferdam base plate lifting system: anchor point 16 was formed under cofferdam base plate lifting system was mainly reached by the anchoring girder that is arranged in the casing end face, cooperated the smart bundle of jack and lifting indented bars to carry out base plate and transferred and bear back cover concrete construction period base plate load.
Because among the present invention, place system and cofferdam base plate lifting system all are methods commonly used in the existing construction under cofferdam navigation system, cofferdam caging system, the cofferdam, why the present invention carries out more explanation, be that original construction means can't impact, and is opposite for after being expressed in employing steel pipe wallboard technology, since the cofferdam wallboard with two, three steel pipes as a unit, processing is fairly simple relatively, need not barge container, is convenient to transportation.The steel pipe cofferdam can adopt small-sized crane barge or other crane gears to carry out assembly unit by the unit, has saved the construction cost that large-scale floating crane drops into.And the cofferdam wallboard just the steel tubular structure of usefulness itself have big, the advantages of high strength of rigidity, increased the security reliability in cofferdam.Cofferdam wallboard steel pipe adopts the structure of bottom lock, has the advantages that can float certainly after the entry, and the later stage can add heavy under water, is easy to control.The cofferdam wallboard can carry out assembly unit synchronously in pile foundation construction later stage and pile foundation construction, has the clear superiority of saving the duration.
Claims (4)
1. cofferdam construction method in the deep water pier bearing platform construction, it is characterized in that: which comprises at least cofferdam base plate (1), pile foundation casing (2), cofferdam wallboard (3), enclose purlin (4), interior support (5), cofferdam wallboard (3) is the steel pipe cofferdam, and the steel pipe cofferdam is connected and composed by steel pipe wallboard unit; Steel pipe wallboard unit is fixed on one by one and encloses on the purlin (4), and is connected with cofferdam base plate (1), and forming by cofferdam base plate (1) floor space and steel pipe wallboard is the space body of spatial altitude; In support (5) with longitudinal and transverse with enclose purlin (4) and be connected to main the support, be linked to be with the inclined-plane and combine, make the common net structure body up and down that forms of steel pipe wallboard unit, cofferdam base plate (1) and interior support (5) one by one, steel pipe (6) the bottom sealing of steel pipe wallboard unit, make integral body accurately be adjusted to required height, carry out the construction of pile foundation casing (2) by the water level of regulating in the steel pipe (6).
2. cofferdam construction method in a kind of deep water pier bearing platform construction according to claim 1 is characterized in that: described steel pipe wallboard unit is by angle steel (9) and stiffener (10) and the fixing steel pipe row shape body that forms of 2 steel pipes (6) welding; Two stiffeners (10) are welded to connect two steel pipes (6) respectively up and down, and two stiffeners (10) inboard connects an angle steel (9) respectively, and angle steel (9) is welded to connect with two steel pipes (6) again; The outside of two steel pipes (6) is connecting angle (9) more up and down, and outboard angle (9) has fixing bolt 8.
3. cofferdam construction method in a kind of deep water pier bearing platform construction according to claim 1 is characterized in that: described steel pipe wallboard unit is by angle steel (9) and stiffener (10) and 3 fixing steel pipe row shape bodies that form of steel pipe welding; Two stiffeners (10) are welded to connect respectively at the position up and down of two steel pipes (6) up and down, and two stiffeners (10) inboard connects an angle steel (9) respectively, and angle steel (9) is welded to connect with two steel pipes (6) again; The outside of two steel pipes (6) is connecting angle (9) more up and down, and outboard angle (9) has fixing bolt (8).
4. cofferdam construction method in a kind of deep water pier bearing platform construction according to claim 1 is characterized in that: the diameter of steel tube in the described steel pipe wallboard unit is between 1.0～2.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010103010702A CN102140801A (en) | 2010-02-02 | 2010-02-02 | Cofferdam construction method in construction of deepwater pier bearing platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010103010702A CN102140801A (en) | 2010-02-02 | 2010-02-02 | Cofferdam construction method in construction of deepwater pier bearing platform |
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| CN102140801A true CN102140801A (en) | 2011-08-03 |
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| CN2010103010702A Pending CN102140801A (en) | 2010-02-02 | 2010-02-02 | Cofferdam construction method in construction of deepwater pier bearing platform |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195071A (en) * | 2013-03-25 | 2013-07-10 | 浙江省隧道工程公司 | Riding-pipe steel plate earth core filling coefferdam structure and construction process thereof |
| CN103469789A (en) * | 2013-09-30 | 2013-12-25 | 中铁二十局集团有限公司 | Karst-area underwater bridge pier drilled pile construction method |
| CN103835239A (en) * | 2014-02-26 | 2014-06-04 | 中铁大桥局股份有限公司 | Floating pier with adjustable height |
| CN103882878A (en) * | 2014-03-21 | 2014-06-25 | 北京工业大学 | Method for constructing combined type steel sheet pile cofferdam for abrupt slope hard rock river bed deepwater bearing platform |
| CN104032718A (en) * | 2014-06-10 | 2014-09-10 | 中国人民解放军理工大学 | Light self-floating manual-erecting elevated structure |
| CN104594367A (en) * | 2015-01-23 | 2015-05-06 | 中国建筑第七工程局有限公司 | Combined cofferdam structure and construction method |
| CN104727225A (en) * | 2015-02-10 | 2015-06-24 | 中交一航局第一工程有限公司 | Dry method installing construction method for offshore large-tonnage prefabricated abutment |
| CN104775354A (en) * | 2015-03-31 | 2015-07-15 | 董满生 | Large-sized bridge cushion cap structure and construction method |
| CN104805854A (en) * | 2015-04-29 | 2015-07-29 | 中铁四局集团第二工程有限公司 | Method for constructing deep-water ultra-long steel plate pile cofferdam in tide environment |
| CN106192767A (en) * | 2016-08-31 | 2016-12-07 | 中交二航局第四工程有限公司 | A kind of device that can improve bottom concrete bearing capacity and construction method |
| CN109944262A (en) * | 2019-04-09 | 2019-06-28 | 江苏现代路桥有限责任公司 | A kind of steel cofferdam installation method of reinforcement bridge submerged structure |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195071A (en) * | 2013-03-25 | 2013-07-10 | 浙江省隧道工程公司 | Riding-pipe steel plate earth core filling coefferdam structure and construction process thereof |
| CN103469789A (en) * | 2013-09-30 | 2013-12-25 | 中铁二十局集团有限公司 | Karst-area underwater bridge pier drilled pile construction method |
| CN103835239B (en) * | 2014-02-26 | 2016-02-17 | 中铁大桥局集团有限公司 | Adjustable height floats pier |
| CN103835239A (en) * | 2014-02-26 | 2014-06-04 | 中铁大桥局股份有限公司 | Floating pier with adjustable height |
| CN103882878A (en) * | 2014-03-21 | 2014-06-25 | 北京工业大学 | Method for constructing combined type steel sheet pile cofferdam for abrupt slope hard rock river bed deepwater bearing platform |
| CN103882878B (en) * | 2014-03-21 | 2016-06-08 | 北京工业大学 | A kind of hard rock riverbed, abrupt slope deep water cushion cap combined steel sheeting cofferdam constructional method |
| CN104032718A (en) * | 2014-06-10 | 2014-09-10 | 中国人民解放军理工大学 | Light self-floating manual-erecting elevated structure |
| CN104594367A (en) * | 2015-01-23 | 2015-05-06 | 中国建筑第七工程局有限公司 | Combined cofferdam structure and construction method |
| CN104727225A (en) * | 2015-02-10 | 2015-06-24 | 中交一航局第一工程有限公司 | Dry method installing construction method for offshore large-tonnage prefabricated abutment |
| CN104775354A (en) * | 2015-03-31 | 2015-07-15 | 董满生 | Large-sized bridge cushion cap structure and construction method |
| CN104805854A (en) * | 2015-04-29 | 2015-07-29 | 中铁四局集团第二工程有限公司 | Method for constructing deep-water ultra-long steel plate pile cofferdam in tide environment |
| CN106192767A (en) * | 2016-08-31 | 2016-12-07 | 中交二航局第四工程有限公司 | A kind of device that can improve bottom concrete bearing capacity and construction method |
| CN106192767B (en) * | 2016-08-31 | 2017-12-26 | 中交二航局第四工程有限公司 | A kind of device and construction method that can improve bottom concrete bearing capacity |
| CN109944262A (en) * | 2019-04-09 | 2019-06-28 | 江苏现代路桥有限责任公司 | A kind of steel cofferdam installation method of reinforcement bridge submerged structure |
| CN109944262B (en) * | 2019-04-09 | 2023-12-05 | 江苏现代路桥有限责任公司 | Steel cofferdam installation method for reinforcing bridge underwater structure |
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Application publication date: 20110803 |