CN103352472A - Construction method of deep water pile foundation without steel pile casings - Google Patents
Construction method of deep water pile foundation without steel pile casings Download PDFInfo
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- CN103352472A CN103352472A CN2013102828163A CN201310282816A CN103352472A CN 103352472 A CN103352472 A CN 103352472A CN 2013102828163 A CN2013102828163 A CN 2013102828163A CN 201310282816 A CN201310282816 A CN 201310282816A CN 103352472 A CN103352472 A CN 103352472A
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Abstract
The invention provides a construction method of a deep water pile foundation without steel pile casings. The construction method comprises the following steps that (1) a covering layer and sludge on a riverbed at a pier position are cleaned, and rock of the riverbed is completely exposed; (2) a steel cofferdam is placed downwards at the pier position; (3) underwater bottom sealing concrete is poured in the steel cofferdam, and pouring is paused when the bottom sealing concrete is poured by 50cm lower than a preset height; (4) after the bottom sealing concrete reaches the design strength, water in the steel cofferdam is completely pumped out, lofting of bored pile positions is conducted in the steel cofferdam, and meanwhile lofting of steel pipe pile positions used for setting-up of a drilling platform is conducted; (5) drill guide steel pile casings with the height of 150cm are installed at the bored pile positions, steel pipe piles are installed at the steel pipe pile positions, the scale height of the top of each steel pipe pile is arranged in the mode that the top of each steel pipe pile is flush with the top of the steel cofferdam, and then the remaining portion, with the height of 50 cm, of the bottom sealing concrete is poured; (6) lower supporting is conducted by the steel pipe piles and the steel cofferdam, and the drilling platform is set up; (7) drilling machines are placed in position to conduct drilling.
Description
Technical field
The present invention relates to a kind of Deep-Water Bored Pile job practices, be specifically related to a kind of large bridge Construction of Deep-water Pile technology of utilizing steel cofferdam.
Background technology
In deep water, all adopt at present full casing form in the bored pile, with the steel casing as the construction auxiliary part, mouth will insert the Riverbed certain depth at the bottom of specifically being arranged as the steel casing, the top mouth will surface more than 4～6m, and the major function of steel casing is the container for drilling machine platform support waterborne, rig guiding, borehole wall-protection, maintenance head height, concrete form.Generally speaking, nearly tens of the drilled piles of a pier position, each position needs a steel casing, especially in the profundal zone construction, needs the length of steel casing very long, and therefore this job practices need to expend great deal of steel, and cost is very high, and complicated construction technique.
Summary of the invention
The object of the present invention is to provide a kind of Construction of Deep-water Pile method without the steel casing, to save steel casing cost, reduce numerous and diverse working procedure.
Technical scheme of the present invention is as follows:
A kind of Construction of Deep-water Pile method without the steel casing is characterized in that, may further comprise the steps:
(1) at first with the covering layer on the riverbed, place, pier position and mud cleaning, make its riverbed expose rock fully;
(2) transfer steel cofferdam at place, pier position;
(3) build bottom concrete under water in steel cofferdam, bottom concrete is poured into from predetermined altitude also during poor 50cm, and time-out is built;
(4) after bottom concrete reaches design strength, water in the steel cofferdam is drained, setting-out goes out the drilled pile position in the cofferdam, and simultaneously setting-out goes out the stake position be used to the steel pipe pile of setting up drilling platform;
(5) the drill bit guiding steel casing of high 150cm is installed in described drilled pile position, described drill bit guiding steel casing diameter is than the design stake large 20～40cm in footpath; Steel pipe pile is installed in the steel pipe pile position, and high the setting with the top, cofferdam of steel pipe pile top mark flushes; Then build the high bottom concrete of remaining 50cm;
(6) utilize described steel pipe pile and cofferdam wall to make lower support, set up drilling platform;
(7) the rig drilling construction that carries out in place.
The present invention arranges one and only has the high drill bit guiding steel casing of 150cm in each position, and because drill bit guiding steel casing only play the guiding role, need not consider stressedly, therefore can adopt the Steel Thin-Wall casing of wall thickness δ 1.2cm, thereby the present invention can save great deal of steel, and construction technology is simple.
The present invention is particularly useful for following execution conditions: stake method construction behind (1) first weir; (2) therefore naked rock or riverbed shallow overburden do not need steel cylinder-wall protecting function; (3) adopt the double-wall steel cofferdam construction low pile cap, pile crown flushes with bottom concrete, does not therefore need the steel casing to make the inner concrete container.
Description of drawings
Fig. 1 is the piling plan of a kind of embodiment of the present invention
Fig. 2 is the drilling construction view of an embodiment of the present invention.
The specific embodiment
Below in conjunction with Fig. 1 and Fig. 2, method of the present invention is elaborated.Implementation step of the present invention is as follows:
(1), at first the pier position is located covering layer and mud cleaning on the riverbed 1, made the riverbed 1 at place, pier position expose rock fully.Covering layer and mud are cleaned out, and concrete does not mix with earth in the time of can guaranteeing the cofferdam back cover, thereby improves the bottom concrete quality; The stake hole wall is without dirt bed in the time of can guaranteeing to hole, thereby guarantees the stability of hole wall.
(2), transfer steel cofferdam 2 at place, pier position.Steel cofferdam can be transferred according to on-the-spot natural conditions, existing boats and ships and the rational form of structure of selection of mechanical equipment.
(3), in steel cofferdam 2, build bottom concrete 3 under water, bottom concrete 3 is poured into from predetermined altitude also during poor 50cm, time-out is built.
It is integrated poured that described bottom concrete can adopt " vertical many tremie methods " to carry out.Described " vertical many tremie methods " namely vertically put into the steel conduit that a plurality of internal diameters are 200～300mm in the cofferdam, the pipe end is connected to the funnel of certain capacity far from bottom surface, cofferdam 30～40mm at the conduit top, at funnel neck ball plug, and fasten with rope.The full Sheng fallen into the larger concrete of degree in the funnel, cuts off rope when building, simultaneously rapidly constantly to the funnel penetration concrete, interior bulb stopper, the empty G﹠W of conduit this moment discharged by the pipe end by the concrete gravity extruding all, moment, concrete is built at bottom, cofferdam heap, makes outer closure isolation in the cofferdam.
(4), after bottom concrete reaches design strength, water in the steel cofferdam is drained, setting-out goes out drilled pile position 4 in the cofferdam, simultaneously setting-out goes out be used to the steel pipe pile position 5 of setting up drilling platform.Generally speaking, 5 bit quantity of steel pipe pile of going out of setting-out can equate with the drilled pile bit quantity.Among the embodiment as shown in Figure 2,4 of drilled piles and steel pipe pile position 5 respectively have 26.
(5), the drill bit guiding steel casing 6 of high 150cm is installed in described drilled pile position, drill bit guiding steel casing 6 diameters are than the design stake large 20～40cm in footpath; Steel pipe pile 7 is installed in the steel pipe pile position, and high the setting with the top, cofferdam of the top mark of steel pipe pile 7 flushes; Then build the high bottom concrete of remaining 50cm, drill bit guiding steel casing 6 and steel pipe pile 7 parts are embedded in the bottom concrete, fixed.Because drill bit guiding steel casing 6 only play the guiding role, need not consider stressedly, therefore can adopt the Steel Thin-Wall casing of wall thickness δ 1.2cm.
(6), utilize described steel pipe pile 7 and cofferdam wall to make lower support, set up drilling platform 8.
(7), finish putting up platform after, rig 9 drilling constructions that carry out in place.
Bore process adopts method of air lifting reverse circulation clear water drilling construction.Gas lift reverse circulation creeps into has the advantages such as chip removal ability is strong, drilling efficiency is high, bit life is long, hole quality is good.For satisfying height of water level in the gas lift reverse circulation construction cofferdam, sidewall in described cofferdam is provided with the valve of through hole and control through hole switch, open valve during drilling construction, can make the inside and outside UNICOM in cofferdam, in order to avoid cause anti-circulation to extract out in the cofferdam behind the water, cause in the excessive and cofferdam of the inside and outside water-head in cofferdam water level to hang down and to satisfy the required water pressure of gaslift.Because omnidistance for creeping into the rock stratum, employing method of air lifting reverse circulation clear water drilling construction can greatly reduce the pollution to water environment.
Claims (6)
1. the Construction of Deep-water Pile method without the steel casing is characterized in that, may further comprise the steps:
(1) at first with the covering layer on the riverbed, place, pier position and mud cleaning, make its riverbed expose rock fully;
(2) transfer steel cofferdam at place, pier position;
(3) build bottom concrete under water in steel cofferdam, bottom concrete is poured into from predetermined altitude also during poor 50cm, and time-out is built;
(4) after bottom concrete reaches design strength, water in the steel cofferdam is drained, setting-out goes out the drilled pile position in the cofferdam, and simultaneously setting-out goes out be used to the steel pipe pile position of setting up drilling platform;
(5) the drill bit guiding steel casing of high 150cm is installed in described drilled pile position, described drill bit guiding steel casing diameter is than the design stake large 20～40cm in footpath; Steel pipe pile is installed in the steel pipe pile position, and high the setting with the top, cofferdam of steel pipe pile top mark flushes; Then build the high bottom concrete of remaining 50cm;
(6) utilize described steel pipe pile and cofferdam wall to make lower support, set up drilling platform;
(7) the rig drilling construction that carries out in place.
2. method according to claim 1, it is characterized in that: in the described step (4), the steel pipe pile bit quantity that setting-out goes out equates with the drilled pile bit quantity.
3. method according to claim 1 is characterized in that: the wall thickness of described drill bit guiding steel casing is 1.2cm.
4. method according to claim 1 is characterized in that: described bottom concrete adopts " vertical many tremie methods " to carry out integrated poured.
5. method according to claim 1 is characterized in that: drilling construction employing method of air lifting reverse circulation clear water drilling construction.
6. method according to claim 1, it is characterized in that: the sidewall in described cofferdam is provided with through hole and valve, makes the inside and outside UNICOM in cofferdam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013102828163A CN103352472A (en) | 2013-07-06 | 2013-07-06 | Construction method of deep water pile foundation without steel pile casings |
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| CN2013102828163A CN103352472A (en) | 2013-07-06 | 2013-07-06 | Construction method of deep water pile foundation without steel pile casings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628511A (en) * | 2013-12-17 | 2014-03-12 | 中铁大桥局集团第四工程有限公司 | Setting-out plumbing method for pile foundation casing |
| CN105257215A (en) * | 2015-10-06 | 2016-01-20 | 中交第四公路工程局有限公司 | Method for performing in-water pile foundation hole drilling by large-diameter reverse circulation roller cone drilling |
| CN109868805A (en) * | 2019-02-28 | 2019-06-11 | 天津大学 | Steel pile casting formula heavy-tamping method underwater reinforced construction method |
| CN110080684A (en) * | 2019-05-08 | 2019-08-02 | 永康微唯智能科技有限公司 | A kind of support protecting apptss of drilled pile |
| CN113006056A (en) * | 2021-03-23 | 2021-06-22 | 蒙城安路蓝海交通投资有限公司 | Deepwater pile foundation construction method |
| CN115324086A (en) * | 2022-07-29 | 2022-11-11 | 中交路桥建设有限公司 | Cofferdam and drilling platform integrated system and application construction method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628511A (en) * | 2013-12-17 | 2014-03-12 | 中铁大桥局集团第四工程有限公司 | Setting-out plumbing method for pile foundation casing |
| CN103628511B (en) * | 2013-12-17 | 2015-07-08 | 中铁大桥局集团第四工程有限公司 | Setting-out plumbing method for pile foundation casing |
| CN105257215A (en) * | 2015-10-06 | 2016-01-20 | 中交第四公路工程局有限公司 | Method for performing in-water pile foundation hole drilling by large-diameter reverse circulation roller cone drilling |
| CN105257215B (en) * | 2015-10-06 | 2017-07-07 | 中交第四公路工程局有限公司 | A kind of method of use Large Diameter Reverse circulation roller boring water-filling pile foundation drilling |
| CN109868805A (en) * | 2019-02-28 | 2019-06-11 | 天津大学 | Steel pile casting formula heavy-tamping method underwater reinforced construction method |
| CN110080684A (en) * | 2019-05-08 | 2019-08-02 | 永康微唯智能科技有限公司 | A kind of support protecting apptss of drilled pile |
| CN113006056A (en) * | 2021-03-23 | 2021-06-22 | 蒙城安路蓝海交通投资有限公司 | Deepwater pile foundation construction method |
| CN115324086A (en) * | 2022-07-29 | 2022-11-11 | 中交路桥建设有限公司 | Cofferdam and drilling platform integrated system and application construction method thereof |
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| CB02 | Change of applicant information |
Address after: 100027, Beijing, Dongcheng District, East Street, No. 9 east ring Plaza, block A, Luqiao building, eight floor Applicant after: Road & Bridge International Co., Ltd. Applicant after: ROAD AND BRIDGE EAST CHINA ENGINEERING CO., LTD. Address before: 100027, Beijing, Dongcheng District, East Street, No. 9 east ring Plaza, block A, Luqiao building, eight floor Applicant before: Road & Bridge International Co., Ltd. Applicant before: Road & Bridge East China Engineering Co., Ltd. |
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Application publication date: 20131016 |