CN108824211A - A kind of bridge pier foundation in construction duration method in the river of bridge - Google Patents
A kind of bridge pier foundation in construction duration method in the river of bridge Download PDFInfo
- Publication number
- CN108824211A CN108824211A CN201810805942.5A CN201810805942A CN108824211A CN 108824211 A CN108824211 A CN 108824211A CN 201810805942 A CN201810805942 A CN 201810805942A CN 108824211 A CN108824211 A CN 108824211A
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- China
- Prior art keywords
- cofferdam
- layer
- construction
- river
- pile
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
Abstract
The invention discloses bridge pier foundation in construction duration methods in a kind of river of bridge, including steps are as follows：Trestle is set up from river two sides are synchronous, it extends in river, set up platform in trestle end, stayed among platform set it is multiple for construct pile foundations cavity, by pile foundation casing inserting piling into bottom of river channel soil layer, the pore-forming operation in pile foundation casing, in cast-in-situ bored pile is poured in pile foundation casing in stake holes, removes trestle and platform, cast-in-situ bored pile after the completion of construction carries out cofferdam construction, pours cushion cap concrete, sets up temporary rest pier bracket, connection support portion is poured from cushion cap to two sides；The twice battered leg that support portion is V-type setting is connected, is embedded with the horizontally disposed prestressing tendon of multiple tracks on battered leg.The present invention is by above-mentioned setting, and quality can obtain good guarantee to the pier footing of bridge in the construction process, and the connection support portion being arranged on cushion cap also can be good at providing support force structure for bridge, is conducive to the stability of bridge entirety.
Description
Technical field
The present invention relates to bridge construction field, in particular to bridge pier foundation in construction duration method in a kind of river of bridge.
Background technique
Bridge is essential architectural engineering in town road, major function be also no longer limited to " Whening happen upon streams, bridge them " this
One traditional application places, more have the more powerful and complicated bridge of the functions such as railway bridge, urban viaduct, viaduct
Beam.
The technique of any one bridge therein is all more complex, and body of a bridge quality requirement is high, not only needs to meet normal logical
Row demand will also can adapt to gravity, frictional force, centrifugal force and the effect of vibration of current train, while often multispan bridge
Across the normal navigation for also needing to meet river, therefore water pressure when the body of a bridge there is a need for being able to resist navigation and water is floating
Power.
Multispan bridge is required to build pier footing in river, and the stability of pier footing is for the steady of bridge entirety
It is qualitative particularly important.Therefore how to reinforce the stability of pier footing, and particularly important part during bridge construction.
Summary of the invention
The object of the present invention is to provide bridge pier foundation in construction duration methods in a kind of river of bridge, have reinforcement pier footing steady
Fixed effect.
Above-mentioned technical purpose of the invention technical scheme is that, bridge pier in a kind of river of bridge
Foundation construction method, including steps are as follows：
S1, trestle construction set up trestle from river two sides are synchronous, extend in river；
S2, platform construction set up platform in trestle end, stay among platform and set multiple cavitys for pile foundation of constructing；
S3, cast-in-situ bored pile pour, by inserting piling in pile foundation casing cavity reserved among platform into bottom of river channel soil layer,
Pore-forming operation in pile foundation casing, in pouring cast-in-situ bored pile in stake holes in pile foundation casing；
S4, bearing platform construction remove trestle and platform, and the cast-in-situ bored pile after the completion of construction carries out cofferdam construction, and cofferdam is complete
It draws water after, cofferdam inner support is installed, pours cushion cap concrete again；
S5, connection support portion construction, sets up temporary rest pier bracket, connection support portion is poured from cushion cap to two sides；
Wherein, the twice battered leg that support portion is V-type setting, when setting up temporary rest pier bracket, the edge centered on cushion cap are connected in S5
To the multiple rows of prefabricated pile of two sides inserting piling, the top of prefabricated pile has poured multiple interim cushion caps in bridge length direction, takes on interim cushion cap
If more steel-pipe piles, steel-pipe pile top absolute altitude is matched with the bottom surface absolute altitude for connecting support portion, and steel-pipe pile top is successively laid with vertical
Beam, distribution beam and the bottom surface template for connecting support portion；Bottom surface template carries out internal reinforcing bar binding after being installed, then is attached
The concrete pouring construction of support portion, while the horizontally disposed prestressing tendon of multiple tracks is embedded on twice battered leg.
By using above-mentioned technical proposal, cast-in-situ bored pile is capable of providing good stress posting body, can by top by
Power is timely transmitted in supporting course, and pile foundation stability is also higher, is conducive to the stability of pier footing；In bearing platform construction,
To the dismounting sequence of cofferdam inner support when processing method and reinforcement means and casting concrete to cofferdam, can be good at tieing up
The whole stress balance for holding cofferdam reduces the whole deformation in cofferdam, keeps cofferdam to internal holding effect, is conducive to ensure and hold
The construction quality and finished size of platform, it is particularly important for the stability under loading of cushion cap；The connection support portion being arranged on cushion cap
Also it can be good at providing support force structure for bridge, be conducive to the stability of bridge entirety, meanwhile, cushion cap stress itself is equal
It is even reliable, further enhance the global reliability of bridge itself.
The further setting of the present invention is：Cushion cap includes upper layer and lower layer in the S4, and lower layer is cuboid and is connected to brill
On hole pouring pile, upper layer is taper type and is fixedly connected with twice battered leg；When cofferdam construction, continuously applied using single layer steel sheet pile
Work after the completion of cofferdam, to operation of drawing water is carried out in cofferdam, when moisture takes out 1/3 in cofferdam, sets up the cofferdam inner support of first layer,
When moisture is evacuated to 2/3 in cofferdam, sets up the cofferdam inner support of the second layer and set up in the cofferdam of third layer in cofferdam after moisture pump
Support.
By using above-mentioned technical proposal, is constructed, kept to list by moisture and interlocking for cofferdam inner support when setting up cofferdam
Layer steel sheet pile continuous action has abutting force, to offset the pressure of external water pressure, keeps the force stability of single layer steel sheet pile.
The further setting of the present invention is：After the completion of the cofferdam inner support of third layer is set up, cofferdam inner base soil layer is flattened,
The first layer of blinding layer, the underclad portion for pouring cushion cap again is poured, first layer is removed after the completion of pouring in the cofferdam of third layer
Support, then the second layer of the underclad portion of cushion cap is poured, the second layer removes the cofferdam inner support of the second layer after the completion of pouring, then pours and hold
The third layer of the underclad portion of platform, third layer remove the cofferdam inner support of third layer after the completion of pouring.
By using above-mentioned technical proposal, pouring for cushion cap also successively substitutes between the inner support of cofferdam, to further tie up
The withstanding effect power to single layer steel sheet pile is held, reduces external water pressure to the pressure of single layer steel sheet pile, while being also advantageous to
The stability of cofferdam internal structure.
The further setting of the present invention is：Three layers of cofferdam inner support structures setting are identical, include angle brace, binder support and
Landing support；The angle brace includes at least two supporting rods disposed in parallel, and is equipped with and hangs down between two adjacent supporting rods
Straight connecting rod；The binder support is arranged along the cofferdam width direction, including two main brace binders disposed in parallel, and two
It is arranged between the main brace binder for truss；The bottom end of landing support is inserted in the basic soil layer of cofferdam bottom, lands the top of support
The fixed bottom surface for being connected to angle brace and binder support in end, and when the underclad portion of cushion cap pours, landing support directly pours in cushion cap
Portion.
By using above-mentioned technical proposal, angle brace, the combination that binder supports and landing support is mutual, which can significantly increase, encloses
The structural stability on weir, at the same land support do not need remove directly pour to cushion cap, also further strengthen cofferdam with
Connectivity between cushion cap is able to ascend the overall stability in cofferdam within the construction stage of cofferdam effect.
The further setting of the present invention is：In S3 when bored pile construction, a point multiple batches carry out simultaneously, and each batch
The position of secondary while construction cast-in-situ bored pile is staggered in plum blossom.
By using above-mentioned technical proposal, divides multiple batches and be conducive to accelerate construction progress, and each batch is applied simultaneously
The position of the cast-in-situ bored pile of work is staggered in plum blossom, on the one hand provides certain construction space to each lots, separately
On the one hand influencing each other between each stake holes is also reduced.
The further setting of the present invention is：In S2 when platform construction, from bank to the inserting piling multirow steel tubes stake of korneforos elder generation, steel pipe
The top of stake is equipped with crossbeam, is laid with stringer on crossbeam, distribution beam is laid on stringer, is equipped with panel in distribution beam.
The further setting of the present invention is：K font supporting element is welded on the crossbeam to reinforcing crossmember and steel-pipe pile,
The long side of the K font supporting element is parallel with crossbeam.
The further setting of the present invention is：The trestle construct when, from bank into river more steel-pipe piles of inserting piling, steel pipe
The top of stake is equipped with crossbeam, is laid with stringer on crossbeam, distribution beam is laid on stringer, is equipped with panel in distribution beam.
By using above-mentioned technical proposal, trestle and platform temporary facility important when being all foundation construction, by above-mentioned
Structure, so that trestle and platform stable structure, bearing capacity is high, can adapt to most of construction requirement.
In conclusion the invention has the advantages that：Pier footing stable structure of the railway bridge in river, by
Power is uniform, and since sequence of construction is proper, quality can obtain good guarantee；Connection support portion is additionally provided on pier footing,
Convenient for connecting with superstructure, different loading angle and size are adapted to.
Detailed description of the invention
Fig. 1 is the side view of cushion cap and connection support portion；
Fig. 2 is the top view in cofferdam；
Fig. 3 is the sequence of construction distribution map of cast-in-situ bored pile.
In figure：1, cushion cap；2, underclad portion；3, top section；4, support portion is connected；5, cofferdam；6, angle brace；7, binder
Support；8, first batch；9, second lot；10, third batch.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in this hair
All by the protection of Patent Law in bright scope of the claims.
Embodiment, a kind of bridge pier foundation in construction duration method in the river of bridge, includes the following steps：
S1, trestle construction.Synchronous to five row's steel-pipe pile of river center inserting piling, every row two from bank both sides, four meters of horizontal spacing,
Eight meters of longitudinal span, amounts to Ha Noi and extends 40 meters.Steel pipe stake top erector's word steel welds K word as crossbeam on crossbeam
The long side of the supporting element of shape, K font supporting element is parallel with crossbeam, to reach the connection of reinforcing crossmember and two steel-pipe piles with row
Intensity.
After crossbeam installation is reinforced, from bank, into river, segmental hoisting Bailey beam is laid with as stringer in Bailey beam
I-steel is fixedly connected by welding as distribution beam, distribution beam with stringer, and panel is re-layed in distribution beam, i.e. completion trestle
Construction.
S2, platform construction.After the completion of trestle construction, by trestle from bank to 6 row's steel-pipe pile of river center inserting piling, steel pipe
Need to stay the spacing set for basic pile foundation construction between stake, steel pipe stake top erector's word steel is used as crossbeam, welding K font on crossbeam
Supporting element, the long side of K font supporting element is parallel with crossbeam, with reach reinforcing crossmember and with row two steel-pipe piles connection it is strong
Degree.After crossbeam installation is reinforced, from bank, into river, segmental hoisting Bailey beam is laid with I-steel in Bailey beam as stringer
As distribution beam, distribution beam is fixedly connected by welding with stringer, and panel is re-layed in distribution beam, that is, completes applying for platform
Work.Meanwhile according to the diameter of foundation pile, the cavity of respective numbers and diameter is installed in platform interior.
S3, bored pile construction.After the completion of platform construction, 12 pile base casing inserting pilings are entered in the river soil body,
Impact holing method pore-forming is used in pile foundation casing, as shown in figure 3, being divided into first batch 8, second lot 9 and third when pore-forming
The stake point of totally 3 batches and each cast-in-situ bored pile for carrying out, and carrying out simultaneously simultaneously is distributed batch 10 in plum blossom, then to pore-forming
The interior concreting for carrying out basic pile foundation, completes the pouring construction of cast-in-situ bored pile.
S4, cushion cap 1 are constructed.After the completion of cast-in-situ bored pile pours, first trestle and platform are all removed, as shown in Fig. 2, edge
12 pile base casings, which circumferentially enclose, sets cofferdam 5, and cofferdam 5 is enclosed using single layer steel sheet pile to be set, and encloses and is set as rectangle, and in first inserting piling
Close up at downstream after trip.
After the completion of cofferdam 5 is constructed, pumping operation is carried out.When moisture takes out 1/3 in cofferdam 5, set up in the cofferdam 5 of first layer
It supports, when moisture is evacuated to 2/3 in cofferdam 5, sets up 5 inner support of cofferdam of the second layer and set up third layer in cofferdam 5 after moisture pump
5 inner support of cofferdam.Three layers of 5 inner support structure of cofferdam setting are identical, include angle brace 6, binder support 7 and landing support；Angle brace 6 includes at least
Two supporting rods disposed in parallel, and vertical connecting rod is equipped between two adjacent supporting rods；It encloses on 7 edge of binder support
5 width direction of weir is arranged, including two main brace binders disposed in parallel, is arranged between two main brace binders for truss.
After the completion of three layers of 5 inner support of cofferdam in cofferdam 5 are reinforced, soil layer basic in cofferdam 5 is flattened, basis is poured
Bed course, binding 1 reinforcing bar of cushion cap, installation template, as shown in Figure 1, cushion cap 1 includes upper layer and lower layer, lower layer is cuboid and is connected to
On cast-in-situ bored pile, upper layer is taper type and is fixedly connected with twice battered leg.
When pouring 2 structure of underclad portion of cushion cap 1, part multilayer is carried out, and first pours the first layer of the underclad portion 2 of cushion cap 1,
First layer removes 5 inner support of cofferdam of third layer after the completion of pouring, when the concrete structural strength of first layer reaches 75%, then pour
The second layer of the underclad portion 2 of cushion cap 1 is built, the second layer removes 5 inner support of cofferdam of the second layer after the completion of pouring, when mixing for the second layer
When Xtah Crude Clay structure intensity reaches 75%, then the third layer of the underclad portion 2 of cushion cap 1 is poured, third layer removes third after the completion of pouring
5 inner support of cofferdam of layer.Wherein, the bottom end for landing support is inserted in the basic soil layer of 5 bottom of cofferdam, and the top fixation for landing support is supported
It is connected to the bottom surface of angle brace 6 and binder support 7, and in placement layer by layer cushion cap 1, landing support is not needed to remove and directly be poured into cushion cap 1
It is internal.
After the completion of the underclad portion 2 of cushion cap 1 pours, 3 reinforcing bar of top section, installation template are bound, casting concrete simultaneously stays
Reinforcing bar is connected out.
S5, connection support portion 4 are constructed.The twice battered leg that support portion 4 is V-type setting is connected, when construction, first sets up interim branch
Pier bracket, it is concrete prefabricated to 3 row of two sides inserting piling along bridge length direction centered on cushion cap 1 when setting up temporary rest pier bracket
Stake, the top of concrete precast pile pours the interim cushion cap 1 of multiple levels, sets up more steel-pipe piles, steel pipe on interim cushion cap 1
The top absolute altitude of stake is matched with the bottom surface absolute altitude for connecting support portion 4.
I-steel is successively laid with as stringer and distribution beam on the top of steel-pipe pile, re-lays the bottom surface of connection support portion 4
Template, bottom surface template carry out internal reinforcing bar binding after being installed, reinforced slab is pre- between the reinforcing bar of twice battered leg after the completion of pricking
2 horizontally disposed prestressing tendons are embedded with, are finally attached the concrete pouring construction of support portion 4 again.Connection support portion 4 pours
After the completion of building, temporary rest pier bracket, i.e. bridge pier foundation in construction duration in the river of completion railway bridge are removed.
Claims (8)
1. a kind of bridge pier foundation in construction duration method in river of bridge, which is characterized in that including steps are as follows：
S1, trestle construction set up trestle from river two sides are synchronous, extend in river；
S2, platform construction set up platform in trestle end, stay among platform and set multiple cavitys for pile foundation of constructing；
S3, cast-in-situ bored pile pour, by inserting piling in pile foundation casing cavity reserved among platform into bottom of river channel soil layer,
Pore-forming operation in pile foundation casing, in pouring cast-in-situ bored pile in stake holes in pile foundation casing；
S4, cushion cap (1) construction, removes trestle and platform, and the cast-in-situ bored pile after the completion of construction carries out cofferdam (5) construction,
It draws water after the completion of cofferdam (5), cofferdam (5) inner support is installed, pours cushion cap (1) concrete again；
S5, connection support portion (4) construction, sets up temporary rest pier bracket, and connection support portion (4) is poured from cushion cap (1) to two sides；
Wherein, the twice battered leg that support portion (4) are V-type setting is connected in S5, when setting up temporary rest pier bracket, is with cushion cap (1)
Center is along bridge length direction to the multiple rows of prefabricated pile of two sides inserting piling, and the top of prefabricated pile has poured multiple interim cushion caps (1), temporarily
More steel-pipe piles are set up on cushion cap (1), steel-pipe pile top absolute altitude is matched with the bottom surface absolute altitude for connecting support portion (4), steel-pipe pile
Top is successively laid with the bottom surface template of stringer, distribution beam and connection support portion (4)；Bottom surface template carries out internal steel after being installed
Muscle binding, then it is attached the concrete pouring construction of support portion (4), while being embedded with multiple tracks on twice battered leg and being horizontally disposed with
Prestressing tendon.
2. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 1, it is characterised in that：In the S4
Cushion cap (1) includes upper layer and lower layer, and lower layer is cuboid and is connected on cast-in-situ bored pile, upper layer be taper type and with twice battered leg
It is fixedly connected；When cofferdam (5) is constructed, continuously constructed using single layer steel sheet pile, it is interior to cofferdam (5) to take out after the completion of cofferdam (5)
Water operation when cofferdam (5) interior moisture takes out 1/3, sets up cofferdam (5) inner support of first layer, when cofferdam (5) interior moisture is evacuated to 2/3,
It sets up cofferdam (5) inner support of the second layer, after cofferdam (5) interior moisture pump, sets up cofferdam (5) inner support of third layer.
3. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 2, it is characterised in that：Third layer
After the completion of cofferdam (5) inner support is set up, cofferdam (5) inner base soil layer is flattened, blinding layer is poured, is poured under cushion cap (1) again
The first layer of layer part (2), first layer removes cofferdam (5) inner support of third layer after the completion of pouring, then pours the lower layer of cushion cap (1)
The partially second layer of (2), the second layer removes cofferdam (5) inner support of the second layer after the completion of pouring, then pours the lower layer part of cushion cap (1)
Cofferdam (5) inner support of third layer is removed after the completion of dividing the third layer of (2), third layer to pour.
4. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 3, it is characterised in that：Described in three layers
(5) inner support structure setting in cofferdam is identical, includes angle brace (6), binder support (7) and landing support；The angle brace (6) includes at least two
Root supporting rod disposed in parallel, and vertical connecting rod is equipped between two adjacent supporting rods；The binder supports (7)
It is arranged along the cofferdam (5) width direction, including two main brace binders disposed in parallel, is purlin between two main brace binders
Frame setting；The bottom end of landing support is inserted in the basic soil layer of cofferdam (5) bottom, and the top fixation for landing support is connected to angle brace
(6) and the bottom surface of binder support (7), and when the underclad portion (2) of cushion cap (1) pours, landing support directly pours interior into cushion cap (1)
Portion.
5. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 1, it is characterised in that：It drills in S3
When filling pile construction, a point multiple batches carry out simultaneously, and the position of each batch while the cast-in-situ bored pile constructed is handed in plum blossom
Mistake setting.
6. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 1, it is characterised in that：Platform in S2
When construction, from bank to the inserting piling multirow steel tubes stake of korneforos elder generation, the top of steel-pipe pile is equipped with crossbeam, is laid with stringer, stringer on crossbeam
Upper laying distribution beam is equipped with panel in distribution beam.
7. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 6, it is characterised in that：The crossbeam
On be welded with K font supporting element to reinforcing crossmember and steel-pipe pile, the long side of the K font supporting element is parallel with crossbeam.
8. bridge pier foundation in construction duration method in a kind of river of bridge according to claim 7, it is characterised in that：The trestle
When construction, from bank, into river, more steel-pipe piles of inserting piling, the top of steel-pipe pile are equipped with crossbeam, are laid with stringer, stringer on crossbeam
Upper laying distribution beam is equipped with panel in distribution beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805942.5A CN108824211A (en) | 2018-07-20 | 2018-07-20 | A kind of bridge pier foundation in construction duration method in the river of bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805942.5A CN108824211A (en) | 2018-07-20 | 2018-07-20 | A kind of bridge pier foundation in construction duration method in the river of bridge |
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| CN108824211A true CN108824211A (en) | 2018-11-16 |
Family
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| CN201810805942.5A Pending CN108824211A (en) | 2018-07-20 | 2018-07-20 | A kind of bridge pier foundation in construction duration method in the river of bridge |
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| CN110344335A (en) * | 2019-07-31 | 2019-10-18 | 中铁十五局集团第四工程有限公司 | A kind of method of steel trestle, initial platform and cofferdam construction in bridge construction process |
| CN111042144A (en) * | 2019-12-27 | 2020-04-21 | 中冶天工集团有限公司 | Excavation method for foundation pit of underground beam under condition of continuous flow of riverway in cold region |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110344335A (en) * | 2019-07-31 | 2019-10-18 | 中铁十五局集团第四工程有限公司 | A kind of method of steel trestle, initial platform and cofferdam construction in bridge construction process |
| CN110344335B (en) * | 2019-07-31 | 2021-08-10 | 中铁十五局集团有限公司 | Method for constructing steel trestle, initial platform and cofferdam in bridge construction process |
| CN111042144A (en) * | 2019-12-27 | 2020-04-21 | 中冶天工集团有限公司 | Excavation method for foundation pit of underground beam under condition of continuous flow of riverway in cold region |
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Application publication date: 20181116 |