CN107012792B - A kind of construction method of bridge substructure - Google Patents

A kind of construction method of bridge substructure Download PDF

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Publication number
CN107012792B
CN107012792B CN201710366138.7A CN201710366138A CN107012792B CN 107012792 B CN107012792 B CN 107012792B CN 201710366138 A CN201710366138 A CN 201710366138A CN 107012792 B CN107012792 B CN 107012792B
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Prior art keywords
steel sheet
cofferdam
sheet pile
foundation pit
pile
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CN201710366138.7A
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CN107012792A (en
Inventor
郭玉霞
黄小虎
江会平
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Long Shang Construction Co Ltd Of Wenzhou City
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Long Shang Construction Co Ltd Of Wenzhou City
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention discloses a kind of construction methods of bridge substructure, its key points of the technical solution are that inside caulked has sliver or sealing strip between adjacent steel sheet pile;c:The weather board of triangle is installed in leading truck side along water (flow) direction;d:It is passed through water pumper in cofferdam internal ponding is discharged, in the bottom casting concrete layer of the steel sheet pile in cofferdam;e:It is backfilled with backfill in cofferdam and forms foundation pit, both sides are dug out in foundation pit has sloping crater wall, upper sand stone layer is backfilled in slope, keep outside and the bottom of foundation ditch of sand stone layer formation perpendicular, externally reinforced in backfill has mud guard, is close to be equipped with stanchion on the outside of mud guard, and in foundation pit both sides, oblique cutting has anchoring pile, anchoring pile is connected with stanchion by steel wire rope, has reached the cofferdam water proofing property of bridge according to tight, foundation pit construction in bottom is more secured.

Description

A kind of construction method of bridge substructure
Technical field
The present invention relates to field of bridge construction, more particularly to a kind of construction method of bridge substructure.
Background technology
The construction technologies such as bridge foundation construction, including the construction technology of open cut foundation, bored pile foundation, well foundation Deng, and korneforos build bridge process in, and cofferdam can play the role of it is certain go along with sb. to guard him, cofferdam is generally referred in water conservancy work In Cheng Jianshe, to build permanent water conservancy projects, the provisional building enclosure built, effect is to prevent from water and soil from entering to build Object builds position, in cofferdam internal drainage, excavation pit, build building etc., to remove the part as formal building Outside, cofferdam is generally removed after being finished, but general cofferdam structure is more open, and anti-impact force is not strong, and in rapid river The cofferdam built on stream is declined by firmness after larger impact, so on the basis of having water, how to build cofferdam Make it is stable and firm, be bridge substructure construction create facility, be a problem in current bridge construction.
Invention content
The object of the present invention is to provide a kind of arrangement and method for construction of bridge substructure, the cofferdam of the bridge in river water is anti- Aqueous basis is tight, foundation pit construction in bottom is more secured.
To solve the above problems, the present invention provides a kind of construction method of bridge substructure, include the following steps:a:? It needs the surrounding in cofferdam to apply steel pipe guide pile using vibration hammer, and installs two leading trucks between steel pipe guide pile, be oriented to Injection steel sheet pile is hammered in frame internal vibration into shape;b:Inside caulked has sliver or sealing strip between adjacent steel sheet pile;c:Along water (flow) direction The weather board of triangle is installed in leading truck side;d:It is passed through water pumper in cofferdam internal ponding is discharged, in cofferdam Steel sheet pile bottom casting concrete layer;e:It is backfilled with backfill in cofferdam and forms foundation pit, both sides tool is dug out in foundation pit Sloping crater wall backfills upper sand stone layer in slope, and the outside and bottom of foundation ditch for so that sand stone layer is formed are perpendicular, in backfill It is externally reinforced have mud guard, be close to that stanchion is installed on the outside of mud guard, in foundation pit both sides, oblique cutting has anchoring pile, anchoring pile and stanchion It is connected by steel wire rope, f:The casing of 2 to 4 meters of depths is buried in foundation pit, and gets stake holes by the way of recycling drilling construction, And the residual mud in stake sky is cleaned out by way of taking out paddle;g:Pump truck casting concrete, concrete use and make stick firm by ramming It vibrates stirring, until concrete no longer sinks or effervescent and glows subject to mortar.
By using above-mentioned technical proposal, caulked has sliver or sealing strip in the gap between adjacent steel sheet pile, The effect for blocking gap can be played, entering in cofferdam for moisture can be effectively reduced, and concrete has been poured in bottom Layer, the waterproof tightness that can play steel sheet pile bottom is good, can reduce leakage;It is further provided with triangle on the outside Weather board, and then play and adapt to flow excretion, it avoids causing cofferdam excessive water slug, cofferdam installation can be effectively ensured Verticality afterwards;And after excavation of foundation pit using the pull-type support of anchor by the way of, the foundation pit big suitable for excavation area, with closing The protection of sand stone layer can effectively reduce the spilling of moisture, increase the firmness of side wall.
As the further improvement of the present invention, when the bottom leak in the cofferdam in step b is serious, using diver's water Lower concrete sealing bottom carrys out antiseepage.
By using above-mentioned technical proposal, under leak leakage serious situation, underwater use is entered using diving circle Concrete sealing bottom is come the problem of carrying out antiseep, can effectively solve the problem that bottom leaky.
As the further improvement of the present invention, the cofferdam that the steel sheet pile is enclosed passes through positioning in adjacent side Purlin is connected, and fixed purlin is equipped between the weather board.
By using above-mentioned technical proposal, it is provided with positioning purlin, the structure in the cofferdam that steel plate is enclosed is obtained Enhancing on the whole, and fixed purlin is also installed between weather board, playing can realize in triangle weather board The enhancing of portion's structure under the action of receiving water impact, can effectively keep whole structural strength.
As the further improvement of the present invention, lubricating oil is coated in both sides in steel sheet pile.
By using above-mentioned technical proposal, by being provided with lubricating oil, it is to be conducive to water blockoff to play one, second is that preventing two steel Frictional resistance is excessive between sheet pile, and when causing inserting piling steel sheet pile, previous piece of steel sheet pile band is gone down, its top surface absolute altitude is made to decline.
It is buried in the bottom of foundation pit after step f buries casing as the further improvement of the present invention and is placed with slabstone Layer, and poured using layering with the bottom concrete layer of concreting 500mm or more, bottom concrete layer on ragstone layer It builds, the thickness poured every time is no more than 300mm.
By using above-mentioned technical proposal, buried in foundation pit it is anti-have ragstone layer, play the compacting for bottom, and Part except casing has poured bottom concrete layer, plays the reinforcing for foundation pit Foundation Part, increases and puts at stake position Fastness.
As the further improvement of the present invention, the positioning purlin is laid at least two on steel sheet pile vertical direction Group.
It by using above-mentioned technical proposal, is provided in the vertical direction multigroup, and then plays and can realize in vertical side Uniform locating effect is played upwards.
As the further improvement of the present invention, water level 400mm or more is higher by the top of the steel sheet pile.
It by using above-mentioned technical proposal, ensure that in the process of work progress, steel sheet pile can play effective anti- The effect of water.
Further include step h as the further improvement of the present invention:Steel sheet pile and underwater concrete contact site are smeared Separation layer, and using the piling machine pile pulling of vibrations.
By using above-mentioned technical proposal, by being coated with separation layer, and then playing can be the case where pulling out steel sheet pile Under, by being first coated with separation layer, steel sheet pile is pulled up a little, to reduce cohesive force, then pile pulling is realized by piling machine, in turn Play the role of effectively pulling up.
In summary technical solution, the invention has the advantages that:
1, the tight performance that cofferdam is formed is good, by the way that caulked has sliver or sealing strip, energy in gap between steel sheet pile The effect for blocking gap is played, under leak leakage serious situation, coagulation grave is used using diver under water to enter Bottom is come the problem of carrying out antiseep, can effectively solve the problem that bottom leaky.
2, the stable structure that cofferdam is formed, is provided with the weather board of triangle on the outside, and plays and adapt to flow Excretion, avoids causing cofferdam excessive water slug, and the verticality after the installation of cofferdam can be effectively ensured;And it is provided with positioning to enclose Purlin and fixed purlin, increase stability.
Description of the drawings
Fig. 1 is the flow chart of the present invention;
Fig. 2 is the outside schematic diagram in cofferdam of the present invention.
In figure:1, steel sheet pile;2, purlin is positioned;3, weather board;4, fixed purlin.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
With reference to attached drawing 1, a kind of construction method of bridge substructure includes the following steps:
a:Steel pipe guide pile is applied using vibration hammer in the surrounding for needing cofferdam, guide pile is adopted as the guide pile of 600mm, adopts With vibration hammer injection, and two leading trucks are installed between steel pipe guide pile, it, will in leading truck internal vibration hammer injection steel sheet pile 1 The good steel sheet pile 1 of spelling is sling with pile frame, vibration hammer injection, and when inserting piling steel sheet pile 1 will strictly control the verticality of stake, especially It is first group of stake from two mutually perpendicular directions while to control, it is ensured that vertically not partially.After starting inserting piling steel sheet pile 1, gradually will Drawing strickle guide turns linked on the sheet pile accomplished fluently.In order to effectively ensure steel sheet pile inserting piling quality, for the steel sheet pile 1 under having inserted, Gradient is less than 5 ‰, and lubricating oil is coated in both sides in steel sheet pile 1.By being provided with lubricating oil, it is to be conducive to block up to play one Water when causing inserting piling steel sheet pile 1, goes down previous piece of 1 band of steel sheet pile, makes it second is that preventing two steel sheet piles, 1 frictional resistance excessive Top surface absolute altitude declines.The top of the steel sheet pile 1 is higher by water level 400mm or more.It ensure that in the process of work progress, steel Sheet pile 1 can play the effect of effective waterproof.
b:Inside caulked has sliver or sealing strip between adjacent steel sheet pile 1, or a large amount of stoves are sprinkled into water on the outside of crack Slag and sawdust or cavings etc. are pressed from both sides with water to voluntarily blocking at crack, and caulked has cotton in the gap between adjacent steel sheet pile 1 Item or sealing strip can play the effect for blocking gap, can effectively reduce entering in cofferdam for moisture.It is deeper at crack When, it is also possible to clinker packs, and gradually pours out clinker to underwater appropriate depth, weir foot leak seriously uses underwater concrete back cover anti- It oozes;The cofferdam that the steel sheet pile is enclosed is connected in adjacent side by positioning purlin 2, and positioning purlin 2 is in steel sheet pile 1 At least two groups are furnished on vertical direction.It is provided in the vertical direction multigroup, and then plays and can realize and rise in the vertical direction Uniform locating effect is arrived.
c:The weather board 3 of triangle is installed in leading truck side along water (flow) direction, fixation is installed between weather board 3 Purlin 4 plays the enhancing that can be realized for 3 internal structure of triangle weather board, can be effective under the action of receiving water impact Keep whole structural strength.
d:It is passed through water pumper in cofferdam internal ponding is discharged, in the bottom casting concrete of the steel sheet pile 1 in cofferdam Layer.
e:It is backfilled with backfill in cofferdam and forms foundation pit, both sides are dug out in foundation pit and have sloping crater wall, on slope Sand stone layer in interior backfill, the outside and bottom of foundation ditch for so that sand stone layer is formed are perpendicular, and externally reinforced in backfill has mud guard, It is close to that stanchion is installed on the outside of mud guard, in foundation pit both sides, oblique cutting has anchoring pile, anchoring pile with stanchion to be connected by steel wire rope, foundation pit After excavating by the way of the pull-type support of anchor, being suitable for the big foundation pit of excavation area can be effective with the protection for closing sand stone layer Reduction moisture spilling, increase the firmness of side wall.
f:The casing of 2 to 4 meters of depths is buried in foundation pit, and gets stake holes by the way of recycling drilling construction, and cycle is bored It is divided into direct circulation brill and reverse circulation drilling, direct circulation drilling construction:It is small suitable for mud, cohesive soil, sand and gravel cobble grain size It is less than 20% gravelly soil in 10cm contents.Advantage is that drilling is carried out continuously simultaneously with deslagging, and rate of penetration is very fast.Reverse circulation drilling Into construction:It is less than drilling rod internal diameter 2/3 and content less than 20% gravelly soil, soft suitable for cohesive soil, sand and gravel cobble grain size Rock.Its drilling is efficient with deslagging, and rate of penetration is faster than direct circulation, but trouble, boring mud easy blocking pipeline are loaded and unloaded when extension drill rod. Another mud is to flow from the bottom up, and the possibility of hole wall collapse is bigger than direct circulation, and the quality requirement of mud is higher.And in stake sky Residual mud cleaned out by way of taking out paddle, buried in the bottom of foundation pit and be placed with ragstone layer, and with mixed on ragstone layer Solidifying soil pours the bottom concrete layer of 500mm or more, and bottom concrete layer uses placement layer by layer, the thickness poured every time to be no more than 300mm.It is buried in foundation pit and prevents there is ragstone layer, play the compacting for bottom, and the part except casing has poured envelope Base concrete layer plays the reinforcing for foundation pit Foundation Part, increases the fastness put at stake position.
g:Pump truck casting concrete, concrete are vibrated stirring using making stick firm by ramming, up to concrete no longer sinks or effervescent And it glows subject to mortar.
h:Before squeezing into steel sheet pile 1, separation layer will be coated in the contact range of steel sheet pile 1 and underwater concrete;It is being perfused When the first layer of thicker underwater concrete finishes, steel sheet pile 1 is pulled up a little, to reduce cohesive force;Has hydraulic pressure using vibrations The pile-driving and-pulling machine pile pulling of device, it is necessary to when add high pressure jetting to reduce frictional resistance;Hammering makes steel sheet pile 1 be mixed with underwater slightly Solidifying soil, which is detached from, to be bonded;Outer drawing strickle guide is first removed, the water filling into cofferdam makes water level in cofferdam be higher by 1~1.5m outside weir, utilizes weir Nei Shui Counteracted by pressure weir epipolar restriction makes pile lining be detached from underwater concrete;Imderwater cutting is used when necessary.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this It is all protected by Patent Law in the right of invention.

Claims (8)

1. a kind of construction method of bridge substructure, which is characterized in that include the following steps:
a:Steel pipe guide pile is applied using vibration hammer in the surrounding for needing cofferdam, and installs two guiding between steel pipe guide pile Frame, in leading truck internal vibration hammer injection steel sheet pile (1);
b:Inside caulked has sliver or sealing strip between adjacent steel sheet pile (1);
c:The weather board (3) of triangle is installed in leading truck side along water (flow) direction;
d:It is passed through water pumper in cofferdam internal ponding is discharged, in the bottom casting concrete layer of the steel sheet pile (1) in cofferdam;
e:It is backfilled with backfill in cofferdam and forms foundation pit, both sides are dug out in foundation pit and have sloping crater wall, are returned in slope Sand stone layer is filled out, the outside and bottom of foundation ditch for so that sand stone layer is formed are perpendicular, and externally reinforced in backfill has mud guard, is close to Stanchion is installed, oblique cutting has anchoring pile, anchoring pile to be connected by steel wire rope with stanchion in foundation pit both sides on the outside of mud guard;
f:The casing of 2 to 4 meters of depths is buried in foundation pit, and gets stake holes by the way of recycling drilling construction, and in stake sky Residual mud cleaned out by way of taking out paddle;
g:Pump truck casting concrete, concrete are vibrated stirring using making stick firm by ramming, up to concrete no longer sinks or effervescent and general Go out subject to mortar.
2. a kind of construction method of bridge substructure according to claim 1, which is characterized in that when enclosing in step b The bottom leak on weir is serious, using diver with underwater concrete back cover come antiseepage.
3. a kind of construction method of bridge substructure according to claim 2, which is characterized in that the steel sheet pile encloses The cofferdam of formation is connected in adjacent side by positioning purlin (2), and fixed purlin (4) is equipped between the weather board (3).
4. a kind of construction method of bridge substructure according to claim 3, which is characterized in that exist in steel sheet pile (1) Both sides are coated with lubricating oil.
5. a kind of construction method of bridge substructure according to claim 4, which is characterized in that in the embedded shields of step f It after cylinder, is buried in the bottom of foundation pit and is placed with ragstone layer, and use the back cover coagulation of concreting 500mm or more on ragstone layer Soil layer, bottom concrete layer use placement layer by layer, the thickness poured every time to be no more than 300mm.
6. a kind of construction method of bridge substructure according to claim 5, which is characterized in that the positioning purlin (2) at least two groups are laid on steel sheet pile (1) vertical direction.
7. a kind of construction method of bridge substructure according to claim 6, which is characterized in that the steel sheet pile (1) Top be higher by water level 400mm or more.
8. a kind of construction method of bridge substructure according to claim 1, which is characterized in that further include step h:It will Steel sheet pile (1) smears separation layer with underwater concrete contact site, and using the piling machine pile pulling of vibrations.
CN201710366138.7A 2017-05-23 2017-05-23 A kind of construction method of bridge substructure Active CN107012792B (en)

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Publication number Priority date Publication date Assignee Title
CN111809640B (en) * 2020-07-27 2022-04-05 福建兴港建工有限公司 Cofferdam structure and construction method thereof

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JPH0612012B2 (en) * 1985-05-02 1994-02-16 株式会社大林組 Tsukishima construction method
JPH1018229A (en) * 1996-06-28 1998-01-20 Fujita Corp Cofferdam construction method of existing underwater structure
CN102094425B (en) * 2010-12-24 2012-07-04 中铁六局集团有限公司 Foundation pit construction method adopting shallow buried depth Larsen steel plate pile as protective cofferdam
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
CN104196034B (en) * 2014-09-18 2016-09-21 中建交通建设集团有限公司 A kind of utilize steel sheet pile as the foundation ditch construction method in supporting cofferdam
CN205188983U (en) * 2015-11-23 2016-04-27 中交第二航务工程局有限公司 A novel cofferdam structure for construction of deep water cushion cap
CN105507335B (en) * 2016-01-07 2018-12-07 中铁十四局集团第三工程有限公司 Steel sheet-pile cofferdam foundation pit back cover structure and construction method
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CN106436689B (en) * 2016-10-05 2018-10-09 广东煌烨建设工程有限公司 The supporting of cushion cap steel sheet pile and steel sheet pile double as cushion cap template construction method

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