CN101476327A - Subaqueous bearing platform construction method - Google Patents
Subaqueous bearing platform construction method Download PDFInfo
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- CN101476327A CN101476327A CNA2009100365103A CN200910036510A CN101476327A CN 101476327 A CN101476327 A CN 101476327A CN A2009100365103 A CNA2009100365103 A CN A2009100365103A CN 200910036510 A CN200910036510 A CN 200910036510A CN 101476327 A CN101476327 A CN 101476327A
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Abstract
The invention relates to a construction method of a bearing platform in water, which is applied to pre-casting and construction of the bearing platform during the construction of roads and bridges. The construction method comprises the following steps: arranging a pile machine construction steel platform at the preset mounting position of a bearing platform body, and arranging a pile foundation steel protecting cylinder and setting pile foundation construction; pre-casting a bearing platform foundation; hoisting and descending the bearing platform foundation to the preset mounting position; secondarily processing the bearing platform; and completing the bearing platform body, wherein the pre-casting of the bearing platform is to pre-cast a bearing platform shell on the pile machine construction steel platform. Compared with the prior construction method of the bearing platform in water, the invention only precasts the shell of the bearing platform, and the descending weight of the bearing platform is reduced, so that the input cost of a descending bearing frame is reduced, is more economic and reasonable; meanwhile, in the method, a moveable baffle is arranged on the bottom of an embedded water sealing protecting cylinder, so that the sealing cover of the bearing platform is more simple and convenient; water retaining iron boxes can be arranged according to field conditions, the construction proposal is flexible, variable, simple and feasible, and the integral proposal is safe and reliable, is economic and reasonable.
Description
Technical field
The present invention relates to the job practices in a kind of construction of road and bridge, relate in particular to a kind of bridge highrise pile cap construction that is applicable in the water.
Background technology
At present in the construction of road and bridge construction, the construction of cross a river bridge underwater support table is from big aspect, be divided into two kinds of cast-in-place method construction in cofferdam and the constructions of prefabricated installation method, what wherein most underwater support tables adopted is the cast-in-place method construction in cofferdam, comprises earth rock cofferdam, reinforced concrete slab cofferdam, steel sheet-pile cofferdam, steel boxed cofferdam, steel suspended box cofferdam or the like.For highrise pile cap in the bridge water, adopt steel box construction usually, promptly first processing and fabricating steel box by transferring or handling is mounted to design attitude, carries out bottom concrete then and builds, and the water in the box is drained again, and cushion cap reinforcing bar and concreting are installed.The steel box is the cofferdam, also is the exterior sheathing of cushion cap.This steel box construction is usually used in the construction of large-scale underwater support table, and steel using amount is bigger, and most of steel were difficult to reclaim after construction was finished, and cost is higher.
The prefabricated installation method of cushion cap mainly comprises prefabricated method and the prefabrication and lifting method transferred.The prefabrication and lifting method is first prefabricated cushion cap on the coast or on the steel platform, and is in place with the hoisting prefabricated cushion cap of crane gears such as crane ship then.Prefabricated cushion cap is transferred the less at home employing of construction, and according to relevant document, the access bridge cushion cap of Guangzhou Huang Zhou bridge once adopted, but it is whole bearing platform prefabrication, only reserves stake position, steel casing hole.This form of construction work is all very strict to lifting construction equipment and technical requirements, and the scope of application is less.
Based on above-mentioned situation, need design a kind of new underwater support table job practices, it is bigger to solve steel using amount, and most of steel are difficult to reclaim, and uses heavy lifting equipment on a large scale, the difficult problem that construction cost and difficulty are higher.
Summary of the invention
The objective of the invention is under the prerequisite of not using large-scale crane hoisting equipment,, improve the feasibility and the economy of prefabricated cushion cap mounting technique with the minimum cost bridge pier highrise pile cap in the water of constructing.
For achieving the above object, the present invention adopts following technological means:
A kind of underwater support table job practices is applied to bearing platform prefabrication and construction in the road and bridge construction, and its step comprises:
Step a estimates that at the cushion cap body installation site is provided with ram machine construction steel platform, and pile foundation steel casing and pile foundation construction are set;
Step b, prefabricated cushion cap is preliminary;
Step c, the lifting cushion cap is preliminary and transfer to estimating the installation site;
Steps d, the preliminary secondary operations of cushion cap;
Step e, the cushion cap body is finished;
Described prefabricated cushion cap tentatively is meant prefabricated bearing platform shell on ram machine construction steel platform.
Further, described bearing platform shell is set to a uncovered hollow box body that the end is arranged, and it comprises side plate and base plate, and it is identical with cushion cap body design size that the outer profile size of described empty van body is set to.
Further, described bearing platform shell base plate is being provided with water shutoff steel casing with corresponding position, described pile foundation position, and described water shutoff steel casing diameter is greater than the diameter of described pile foundation steel casing.
Further, be provided with the sideboard that is used for the cushion cap water shutoff bottom the described water shutoff steel casing; Described sideboard is a steel plate, is the polylith setting along described water shutoff steel casing inwall circumference; Described sideboard is connected with described water shutoff steel casing inwall axle by loose-leaf, and described sideboard can freely rotate in the above direction of level.
Further, described step b also is included in described bearing platform shell top the dash member is set.Described dash member is set to the water retaining iron case, and described water retaining iron case is set at least one joint, and portion is provided with interior support within it; Described bearing platform shell inside is provided with built-in connection, and described water retaining iron case is fixedly mounted on the described bearing platform shell by described built-in connection; Between described bearing platform shell and described water retaining iron case, also be provided with the watertight rubber pad.
Further, also comprising step b1 between described step b and the step c: on described ram machine construction steel platform, set up place system under the cushion cap, utilize described place system down vertically to transfer prefabricated bearing platform shell in place; Described down place system comprises: be erected at load-bearing buttress on the pile foundation construction steel platform, be erected at transferring frame, be installed in and describedly transfer jack on the frame, be installed in jacking instrument beam on the described jack, be connected the hoist cable between described jacking instrument beam and the described bearing platform shell on the described load-bearing buttress.
For strengthening the force intensity that is subjected to of bearing platform shell, reinforcement horizontal bar, the pre-embedded steel slab that the respective heights position is provided with elongated closure supported in described bearing platform shell side plate inside in described, and described reinforcement horizontal bar and side plate concrete form steel bar concrete " dark waist rail " form.
Described bearing platform shell also is provided with the inner support beam, and described inner support beam adopts shaped steel; Described inner support beam is fixedlyed connected with described pre-embedded steel slab.
Further, also comprising step b1 between described step b and the step c: on described ram machine construction steel platform, set up place system under the cushion cap, utilize described place system down vertically to transfer prefabricated bearing platform shell in place; Described down place system comprises: be erected at load-bearing buttress on the pile foundation construction steel platform, be erected at transferring frame, be installed in and describedly transfer jack on the frame, be installed in jacking instrument beam on the described jack, be connected the hoist cable between described jacking instrument beam and the described bearing platform shell on the described load-bearing buttress.
Further, under the situation about limiting to some extent in the locus, lifting can be carried out in two steps:
Described step c is meant that lifting cushion cap tentatively transfers to more than the water level face; Described steps d is included in described bearing platform shell top the dash member is set, and described dash member is set to the water retaining iron case, and described water retaining iron case is set at least one joint, and portion is provided with interior support within it; Described bearing platform shell inside is provided with built-in connection, and described water retaining iron case is fixedly mounted on the described bearing platform shell by described built-in connection; Between described bearing platform shell and described water retaining iron case, also be provided with the watertight rubber pad; Described step e comprises the cushion cap behind the described installation water retaining iron case is tentatively carried out transferring the second time, until design elevation; Carry out the water shutoff mortar construction in the water shutoff steel casing again, treat that it reaches certain intensity after, drain the water in the bearing platform shell, the cushion cap reinforcing bar is installed, last can bearing platform shell inner chamber concrete makes cushion cap body and pile foundation form integral body.
Compare with the underwater support table job practices of routine, the present invention mainly contains following beneficial effect: the shell of prefabricated cushion cap only, and the weight that cushion cap is transferred reduces, and makes the input cost of transferring bearing frame reduce more economical rationality; This method is provided with sideboard in pre-buried water shutoff casing bottom simultaneously, makes the cushion cap back cover easier; The water retaining iron case is according to situation graded installation on the spot, and constructure scheme is flexible and changeable and simple, safe and reliable, the economical rationality of overall plan.
Description of drawings
Fig. 1 is the flow chart of steps of a kind of underwater support table job practices first embodiment of the present invention;
Fig. 2 is the flow chart of steps of a kind of underwater support table job practices second embodiment of the present invention;
Fig. 3 is that the ram machine construction steel platform among a kind of underwater support table job practices second embodiment of the present invention reaches place system elevation down;
Fig. 4 is the A-A sectional schematic diagram among Fig. 3;
Fig. 5 is the B-B sectional schematic diagram among Fig. 4;
Fig. 6 is that the bearing platform shell secondary is transferred figure after among a kind of underwater support table job practices second embodiment of the present invention the water retaining iron case being installed;
Fig. 7 is a pre-buried water shutoff steel casing base plane schematic diagram among a kind of underwater support table job practices second embodiment of the present invention;
Fig. 8 is the sideboard schematic diagram of pre-buried water shutoff steel casing bottom among a kind of underwater support table job practices second embodiment of the present invention.
The specific embodiment
Come specific embodiments of the invention are described below in conjunction with accompanying drawing.
As Fig. 1, illustrate the flow chart of steps of a kind of underwater support table job practices first embodiment of the present invention, comprising:
Because the water retaining iron case time processing moulding on bearing platform shell and its top is once transferred and put in place, saves time, efficient is higher.Be applicable to the workplace of enough construction spaces.
As Fig. 2, illustrate the flow chart of steps of a kind of underwater support table job practices second embodiment of the present invention, comprising:
In the present embodiment, carry out the lifting first time after bearing platform shell machines, stop more than the water level face, the water retaining iron case is installed again, lifting for the second time afterwards is to design elevation; Such benefit is down that place system can simplify, and reduces construction space.Be applicable to the workplace that working space is limited.
As shown in Figure 3, comprise among second embodiment: shellfish thunder frame top rail 1, shellfish thunder frame buttress 2, buttress bearing beam 3,36# i iron are indulged bridge to spreader beam 4, two 56# i iron cross members 5,6,50 tons of jackscrew 7 of longeron on two 45# i iron, two 45# i iron jacking instrument beams 8, φ 32 fining twisted steel suspender belts 9, prefabricated bearing platform shell 10, pile foundation steel casing 11, pre-buried water shutoff steel casing 12, water retaining iron case 13, sideboard 14.
Prefabricated bearing platform shell making step: cushion cap is prefabricated on former bridge pier pile foundation construction steel platform, after pile foundation construction is finished, earlier the pile foundation construction platform is transformed, the primary structure that bearing platform shell is made platform base is: push up first direction across bridge at the platform steel pipe pile two 56# i iron cross members 5 are set, the vertical bridge of 36# i iron is installed then to spreader beam 4@40cm thereon, spreader beam is not established in the position of pre-buried water shutoff steel casing 12, and vertical spreader beam 4 of being close to water shutoff steel casing 12 adopts two 36# i iron.
Be to reduce the weight that cushion cap is transferred, the only prefabricated housing parts 10 of bearing platform prefabrication, a no cover plate end empty van body arranged, outer profile size is pressed design size, the thick about 40cm of base plate, the thick about 25cm of wallboard all around.The pre-buried water shutoff steel casing 12 than the big 40cm of stake steel casing 11 diameters in the corresponding pile foundation of cushion cap base plate position, water shutoff casing 12 embeds the about 40cm of bearing platform shell 10 base plates, exposes the about 80cm of length of base plate outside.Sideboard 14 is established in water shutoff casing 12 bottoms, is convenient to the construction of cushion cap underseal water.
Prefabricated cushion cap bed die system is: as shown in Figure 4, at 36# i iron spreader beam 4 upper berth one decks 10 * 10 wooden a tree, used in making timber for boats, in other embodiments of the invention, also can use 10# Cao Gang @20cm, spread the 2.5cm plank as soffit formwork at wooden a tree, used in making timber for boats (or 10# channel-section steel) face again.Sidewall internal mold and reservation hole wall adopt wooden model, and outer side form then adopts the typing combination large form (or phenolic aldehyde template) as water retaining iron case 13, and sidewall waterproof Screw arbor with nut at both-ends support (not marking among the figure) is set.
After installing bed die cushion cap base plate and sidewall reinforcing bar are installed, reinforcing bar disconnects at the preformed hole place.Reinforcing bar preformed hole on the wooden model is on-the-spot perforate when reinforcing bar is installed, and is accurate to guarantee reinforcement location.Pre-buried fining twisted steel suspender belt 9 and water shutoff steel casing 12 are installed after reinforcement installation finishes, and steel casing 12 effectively is connected with prefabricated bearing platform shell 10 base plate reinforcing bars.After the equal installation such as the bed die of bearing platform shell 10, reinforcing bar, side form, built-in fitting, carry out housing concreting.
Prefabricated cushion cap is transferred: as shown in Figure 5, transfer frame and mainly adopt " shellfish thunder frame+shaped steel " structure, transfer and be erected on the former pile foundation construction steel platform.Respectively establish one group of vertical bridge to shellfish thunder frame buttress 2 in the cushion cap both sides, establish horizontal shellfish thunder frame crossbeam 1 on the shellfish thunder frame buttress 2, on shellfish thunder frame crossbeam 1, establish i iron longeron 6, establish 50 tons of jackscrew 7 and jacking instrument beam 8 then on i iron longeron 6, φ 32 fining twisted steel suspender belts 9 are anchored on jacking instrument beam 8 or the i iron on the longeron 6 by nut.
As shown in Figure 6, prefabricated bearing platform shell 10 is transferred at twice and is put in place, transfer for the first time to certain elevation (cushion cap is risen in the about 50cm of working water level) back temporary fixed, installation water retaining iron case 13; Transfer for the second time and be mounted to the design elevation position.
Earlier with the even jack-up 40-50cm of cushion cap, behind dismounting cushion cap base plate and the spreader beam, prepare to transfer before transferring.Control according to pre-aligned scale when transferring, whenever transfer the 5cm elevation and check 1 also adjustment in time of each suspension centre, place system is evenly stressed under helping, the control that also helps transferring precision.
The cushion cap back cover: prefabricated bearing platform shell 10 stops to transfer after transferring to design elevation, checks the horizontal level of cushion cap, prepares back cover.Because water shutoff steel casing 12 bottoms have been provided with sideboard 14, as shown in Figure 7, prefabricated bearing platform shell 10 transfer in place after, sideboard 14 is the level of state or oblique riding on the pile foundation construction steel casing 12, as shown in Figure 8 automatically.At this moment earlier with manually taking Fibre Bag, the rope made of hemp etc. to carry out the bottom stuff up a crack, the silt particle of also can taking to pour water in Fibre Bag slurry carries out the shop fixtures jam-pack, between water shutoff steel casing 12 and pile foundation construction steel casing 11, pour into back cover mortar (taking the form of madjack pipe grouting to begin slow grouting from the bottom) then, back cover mortar M30 waterproofing mortar, the about 80cm of perfusion thickness.
Fill inner chamber and preformed hole concrete: strong 3 days after the back cover mortar is built and finished etc., extract the water in bearing platform shell 10 casings, cut off pile foundation construction steel casing 11, plug into and handle the main muscle in cushion cap bottom, installation residue cushion cap reinforcing bar, pre-buried pier shaft reinforcing bar, build cushion cap concrete for the second time, concrete and prefabricated shell are formed suspended deck structure jointly for the second time.After the pier stud construction finishes, remove water retaining iron case 13.
Compare with the underwater support table job practices of routine, the present invention mainly contains following beneficial effect: the shell of prefabricated cushion cap only, and the weight that cushion cap is transferred reduces, and makes the input cost of transferring bearing frame reduce more economical rationality; This method is provided with sideboard in pre-buried water shutoff casing bottom simultaneously, makes the cushion cap back cover easier; The water retaining iron case is according to situation graded installation on the spot, and constructure scheme is flexible and changeable and simple, safe and reliable, the economical rationality of overall plan.
Above disclosed only is embodiments of the invention, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of being done according to the present patent application claim still belongs to the protection domain that the present invention is contained.
Claims (10)
1, a kind of underwater support table job practices is applied to bearing platform prefabrication and construction in the road and bridge construction, and its step comprises:
Step a estimates that at the cushion cap body installation site is provided with ram machine construction steel platform, and pile foundation steel casing and pile foundation construction are set;
Step b, prefabricated cushion cap is preliminary;
Step c, the lifting cushion cap is preliminary and transfer to estimating the installation site;
Steps d, the preliminary secondary operations of cushion cap;
Step e, the cushion cap body is finished;
It is characterized in that described prefabricated cushion cap tentatively is meant prefabricated bearing platform shell on ram machine construction steel platform.
According to right 1 described underwater support table job practices, it is characterized in that 2, described bearing platform shell is set to a uncovered hollow box body that the end is arranged, it comprises side plate and base plate, and it is identical with cushion cap body design size that the outer profile size of described empty van body is set to.
According to right 2 described underwater support table job practicess, it is characterized in that 3, described bearing platform shell base plate is being provided with water shutoff steel casing with corresponding position, described pile foundation position, described water shutoff steel casing diameter is greater than the diameter of described pile foundation steel casing.
4, underwater support table job practices according to claim 3 is characterized in that, described water shutoff steel casing bottom is provided with the sideboard that is used for the cushion cap water shutoff; Described sideboard is a steel plate, is the polylith setting along described water shutoff steel casing inwall circumference; Described sideboard is connected with described water shutoff steel casing inwall axle by loose-leaf, and described sideboard can freely rotate in the above direction of level.
5, underwater support table job practices as claimed in claim 4 is characterized in that, described step b also is included in described bearing platform shell top the dash member is set.
6, underwater support table job practices as claimed in claim 5 is characterized in that, described dash member is set to the water retaining iron case, and described water retaining iron case is set at least one joint, and portion is provided with interior support within it; Described bearing platform shell top is provided with built-in connection, and described water retaining iron case is fixedly mounted on the described bearing platform shell by described built-in connection; Between described bearing platform shell and described water retaining iron case, also be provided with the watertight rubber pad.
7, underwater support table job practices as claimed in claim 6, it is characterized in that, reinforcement horizontal bar, the pre-embedded steel slab that the respective heights position is provided with elongated closure supported in described bearing platform shell side plate inside in described, described reinforcement horizontal bar and side plate concrete form steel bar concrete " dark waist rail " form.
8, underwater support table job practices as claimed in claim 7 is characterized in that, described bearing platform shell also is provided with the inner support beam, and described inner support beam adopts shaped steel; Described inner support beam is fixedlyed connected with described pre-embedded steel slab.
9, as claim 6 or 8 described underwater support table job practicess, it is characterized in that, also comprising step b1 between described step b and the step c: on described ram machine construction steel platform, set up place system under the cushion cap, utilize described place system down vertically to transfer prefabricated bearing platform shell in place; Described down place system comprises: be erected at load-bearing buttress on the pile foundation construction steel platform, be erected at transferring frame, be installed in and describedly transfer jack on the frame, be installed in jacking instrument beam on the described jack, be connected the hoist cable between described jacking instrument beam and the described bearing platform shell on the described load-bearing buttress.
10, underwater support table job practices as claimed in claim 4 is characterized in that,
Described step c is meant that lifting cushion cap tentatively transfers to more than the water level face;
Described steps d is included in described bearing platform shell top the dash member is set, and described dash member is set to the water retaining iron case, and described water retaining iron case is set at least one joint, and portion is provided with interior support within it; Described bearing platform shell inside is provided with built-in connection, and described water retaining iron case is fixedly mounted on the described bearing platform shell by described built-in connection; Between described bearing platform shell and described water retaining iron case, also be provided with the watertight rubber pad;
Described step e comprises the cushion cap behind the described installation water retaining iron case is tentatively carried out transferring the second time, until design elevation; Carry out the water shutoff mortar construction in the water shutoff steel casing again, treat that it reaches certain intensity after, drain the water in the bearing platform shell, the cushion cap reinforcing bar is installed, last can bearing platform shell inner chamber concrete makes cushion cap body and pile foundation form integral body.
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| CN2009100365103A CN101476327B (en) | 2009-01-09 | 2009-01-09 | Subaqueous bearing platform construction method |
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| CN2009100365103A CN101476327B (en) | 2009-01-09 | 2009-01-09 | Subaqueous bearing platform construction method |
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| CN103374923A (en) * | 2013-07-25 | 2013-10-30 | 天津二十冶建设有限公司 | Method for prefabricating and mounting underwater pier |
| CN103669384A (en) * | 2012-09-18 | 2014-03-26 | 颜可仁 | Accurate positioning device for installation of large bearing platform pier column connected component |
| CN104074199A (en) * | 2014-06-17 | 2014-10-01 | 杭州华能大坝安全工程技术有限公司 | Underwater bearing platform construction method |
| CN104164887A (en) * | 2013-05-17 | 2014-11-26 | 颜可仁 | Large deepwater prefabricated bearing platform installation device |
| CN104164890A (en) * | 2013-05-17 | 2014-11-26 | 颜可仁 | Large deepwater prefabricated bearing platform installation device |
| CN105714821A (en) * | 2016-04-14 | 2016-06-29 | 中交第二航务工程局有限公司 | Device for tapping dry construction of anchor rod of waterside face of sheet-pile wharf |
| CN106400828A (en) * | 2016-06-01 | 2017-02-15 | 中交第二航务工程局有限公司 | Steel pipe composite pile foundation applicable to deep water and coral reef geology |
| CN108396761A (en) * | 2018-04-03 | 2018-08-14 | 江苏南通三建集团股份有限公司 | The non-fully pile foundation cushion cap and production method under precipitation state inside a kind of foundation pit |
| CN110331715A (en) * | 2019-07-05 | 2019-10-15 | 广州穗岩土木科技股份有限公司 | A kind of construction method of underground continuous wall in urban construction |
| CN111998051A (en) * | 2019-05-27 | 2020-11-27 | 中国民航大学 | Special mechanical transmission device for braking and traction of waterborne project ship |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103669384A (en) * | 2012-09-18 | 2014-03-26 | 颜可仁 | Accurate positioning device for installation of large bearing platform pier column connected component |
| CN104164887A (en) * | 2013-05-17 | 2014-11-26 | 颜可仁 | Large deepwater prefabricated bearing platform installation device |
| CN104164890A (en) * | 2013-05-17 | 2014-11-26 | 颜可仁 | Large deepwater prefabricated bearing platform installation device |
| CN103374923A (en) * | 2013-07-25 | 2013-10-30 | 天津二十冶建设有限公司 | Method for prefabricating and mounting underwater pier |
| CN104074199A (en) * | 2014-06-17 | 2014-10-01 | 杭州华能大坝安全工程技术有限公司 | Underwater bearing platform construction method |
| CN105714821A (en) * | 2016-04-14 | 2016-06-29 | 中交第二航务工程局有限公司 | Device for tapping dry construction of anchor rod of waterside face of sheet-pile wharf |
| CN105714821B (en) * | 2016-04-14 | 2017-11-21 | 中交第二航务工程局有限公司 | A kind of device for sheet-pile wharf face anchor pole perforate dry application work near water |
| CN106400828A (en) * | 2016-06-01 | 2017-02-15 | 中交第二航务工程局有限公司 | Steel pipe composite pile foundation applicable to deep water and coral reef geology |
| CN108396761A (en) * | 2018-04-03 | 2018-08-14 | 江苏南通三建集团股份有限公司 | The non-fully pile foundation cushion cap and production method under precipitation state inside a kind of foundation pit |
| CN111998051A (en) * | 2019-05-27 | 2020-11-27 | 中国民航大学 | Special mechanical transmission device for braking and traction of waterborne project ship |
| CN111998051B (en) * | 2019-05-27 | 2021-11-09 | 中国民航大学 | Special mechanical transmission device for braking and traction of waterborne project ship |
| CN110331715A (en) * | 2019-07-05 | 2019-10-15 | 广州穗岩土木科技股份有限公司 | A kind of construction method of underground continuous wall in urban construction |
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