CN107700366B - Deep water high-block bridge degree the bridge construction naked rock river bed trestle of hard stone and construction method - Google Patents
Deep water high-block bridge degree the bridge construction naked rock river bed trestle of hard stone and construction method Download PDFInfo
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- CN107700366B CN107700366B CN201711160995.8A CN201711160995A CN107700366B CN 107700366 B CN107700366 B CN 107700366B CN 201711160995 A CN201711160995 A CN 201711160995A CN 107700366 B CN107700366 B CN 107700366B
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional bridges
- E01D15/133—Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey 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
- E01D19/005—Piers, trestles, bearings, expansion joints or parapets specially adapted for portable or sectional bridges
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- 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
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- 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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Abstract
It includes trestle ontology and the horizontal operation platform on front side of trestle ontology that the invention discloses a kind of deep water high-block bridge degree bridge constructions with the naked rock river bed trestle of hard stone and construction method, the trestle；Trestle ontology includes bottom bracing structure, girder and floorings, bottom bracing structure includes one or more lower anchors in the steel buttress anchor pile on naked rock river bed, girder front support is supported in the supporting table of bank side on steel cofferdam and its rear end, and concrete pumping pipe is placed on floorings；For horizontal operation putting up platform on steel cofferdam and it is connected as one with girder, steel buttress anchor pile includes groined type steel buttress and steel buttress anchor structure；The method comprising the steps of: one, steel buttress anchors pile driving construction；Two, main beam supporting；Three, floorings are mated formation.Structure of the invention designs reasonable, easy construction and using effect is good, is supported on naked rock river bed using steel buttress anchor pile is firm, girder rear and front end is respectively supported in steel cofferdam and bank side supporting table, saving of work and time.
Description
Technical field
The invention belongs to bridge construction technical fields, more particularly, to the deep water high-block bridge degree bridge construction naked rock river of hard stone
Bed trestle and construction method.
Background technique
With the development of national economy, China railways bridge cause is grown rapidly, and China is in Bridge Design theory, construction skill
Art and equipment aspect are being caught up with or close to advanced international standard, large span is over strait, crossing-fiver bridge construction is continuously increased.To depth
Water, Gao Dun, Longspan Bridge water in pier carry out in work progress, when riverbed is the naked rock river bed of hard stone, the construction of pier in water
Difficulty is bigger, it usually needs sets up trestle.Wherein, " deep water " refers to the depth of water of bridge foundation in 5m~6m or more, and " high pier " is
Refer to that bridge pier height is 30 meters or more, " large span " refers to porous across footpath overall length >=100 meter and single hole across footpath >=40 meter.Hard stone is (i.e.
Solid rock) refer to fresh complete, particle electrical connection and the rock for having higher mechanical strength, refer generally in saturated-water phase
Under compressive ultimate strength be greater than the rocks of 50 kg/cms, such as sedimentary rock, igneous rock, metamorphic rock, solid rock tool
There are very high mechanical strength and very strong water-resistance.Naked rock river bed refers to that riverbed is the exposed bedrock of intectate.
When reality sets up trestle, since bridge location riverbed is naked rock river bed, rock is hard, and the anchoring of trestle buttress is stack
The critical process of key and trestle construction safety the quality control of bridge construction technology.In deep-water bare solid rock riverbed and
Under streamflow regime, pile foundation construction steel pile casting can not be installed and carry out mud circulation, set up drilling platform difficulty, therefore use tradition
Method plugs steel sheet pile construction or is drilled to hole construction method difficulty using normal impact, and the anchoring of trestle buttress is a great problem；If
Then needing to install chamber type template using pouring underwater concrete package steel buttress method, concreting side's amount is bigger, and
The bad control of construction quality, steel buttress anchoring effect is poor, and in the library flood discharge of flood season Minjiang upper, steel buttress stability is difficult
It also needs to remove concrete using Blasting Excavation method by navigation channel and hydraulic department relevant regulations to guarantee, and after the completion of trestle use
To original bed face.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of high pier of deep water
The span bridge construction naked rock river bed trestle of hard stone, reasonable in design, easy construction remove convenient and using effect
It is good, it is supported on naked rock river bed using steel buttress anchor pile is firm, it is collateral with bank that girder rear and front end is respectively supported at steel cofferdam
It supports on platform, saving of work and time.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of deep water high-block bridge degree bridge construction
With the naked rock river bed trestle of hard stone, it is characterised in that: including the trestle ontology for pier in water of constructing and be located at the trestle ontology
The horizontal operation platform of front side, pier is reinforced concrete knoll in the water；The trestle ontology includes bottom bracing structure, level
The girder being set up on the bottom bracing structure and the floorings being layed on girder, the bottom bracing structure include one
Or multiple lower anchors, in the steel buttress anchor pile on naked rock river bed, the steel buttress anchor pile is arranged vertically, Duo Gesuo
Steel buttress anchor pile is stated to be supported in from the front to the back below girder；The front support of girder pier in for the water of constructing
On steel cofferdam, the rear end of the girder is supported in the supporting table of bank side, and bank side supporting table is the support being erected on riverbank
Platform；The length of the girder is not less than the clear distance between bank side supporting table and steel cofferdam, is placed with and is used on the floorings
It constructs the concrete pumping pipe of pier in the water；The horizontal operation putting up platform is on steel cofferdam, the horizontal operation platform
It is connected as one with girder；
The steel buttress anchor pile includes groined type steel buttress and the steel that is anchored to the groined type steel branch pedestal
Buttress anchor structure, the stake holes for the steel buttress anchor pile lower anchor is drilled on the naked rock river bed, and the stake holes is in
Vertically to lay and its depth be not less than 5m, the groined type steel buttress lower part is located at the middle inside of the stake holes；The steel
Buttress anchor structure is the concrete structure of the concrete form by injecting in the stake holes, the steel buttress anchor structure
Height it is consistent with the depth of the stake holes；The groined type steel buttress includes four structure snd size vertical steels all the same
It manages, is fastenedly connected by horizontal brace rod between adjacent two vertical steel pipes, the horizontal brace rod is located at steel buttress
Above anchor structure；The bottom end of the every vertical steel pipe is supported in the stake holes bottom, under the every vertical steel pipe
Portion is poured into steel buttress anchor structure.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: the concrete
Pumping line is laid from the front to the back along the length of girder.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: the bank is collateral
The apical side height for supportting platform is identical as the overhead height of steel cofferdam, and the top surface of the horizontal operation platform is equal with the top surface of floorings
Together.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: the stake holes
Aperture is φ 2m~φ 3m.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: the vertical steel
The outer diameter of pipe is φ 0.6m~φ 0.65m, and the clear distance between adjacent two vertical steel pipes is 0.4m~0.7m.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: the groined type
The transverse distribution beam that multiple tracks is laid in same level, the transverse distribution beam and the perpendicular cloth of girder are provided on steel buttress
If the girder is supported on transverse distribution beam described in multiple tracks, transverse distribution Liang Juncheng horizontal layout described in multiple tracks and along girder
Length direction lay from the front to the back.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: the groined type
The quantity of laid transverse distribution beam is twice on steel buttress, and transverse distribution beam described in twice is respectively front side distribution beam and is located at
The rear side distribution beam at front side distribution beam rear；
Four vertical steel pipes include front side steel pipe and two piece of two symmetric supports below the front side distribution beam
Rear side steel pipe of the symmetric support below the rear side distribution beam, two front side steel pipes and two rear side steel pipes are in pair
Claim to lay, two front side steel pipes are symmetrically laid in below the left and right sides of girder, and two rear side steel pipes are symmetrically laid
Below the left and right sides of girder；The front side distribution beam is weldingly fixed on two front side steel pipes, the rear side distribution
Beam is weldingly fixed on two rear side steel pipes；
Pass through the fastening of horizontal brace rod described in the multiple tracks from top to bottom laid between adjacent two vertical steel pipes to connect
It connects, the horizontal brace rod is fashioned iron rod piece and is fixedly connected between vertical steel pipe with welding manner；
The postive stop baffle that girder is limited there are two being respectively provided on transverse distribution beam described in per pass, the postive stop baffle
It is arranged vertically, two postive stop baffles are symmetrically laid at left and right sides of girder；The overhead height of the postive stop baffle is low
In the apical side height of girder.
The above-mentioned deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: further include twice
Be laid in same level and to the longitudinal spacing part limited at the top of girder, the longitudinal spacing part in horizontal layout and
It is laid with girder in parallel, and the girder top card is loaded between longitudinal spacing part described in twice；
The upper distribution beam being laid in same level is provided on the girder from the front to the back, the upper distribution beam is in water
Plain cloth is set and itself and the perpendicular laying of girder；The floorings are paved in upper distribution beam described in multiple tracks；
Longitudinal spacing part described in twice is respectively positioned below distribution beam, longitudinal spacing part described in per pass with described in multiple tracks on
Distribution beam, which is fastenedly connected, to be integrated；
The girder includes the Bailey beam that multiple tracks is laid from left to right, and Bailey beam described in multiple tracks is arranged vertically and it
Laid in parallel；It is fastenedly connected and is integrated by longitudinal connection structure between Bailey beam described in adjacent twice, the longitudinal direction connects
Binding structure is the truss frame for connecting being spliced by multiple tracks connecting rod；
The floorings are horizontal steel plate, are provided with protective fence above the left and right sides of the floorings.
Meanwhile a kind of the invention also discloses method and steps simple, design is rationally and easy construction, construction quality are easy to protect
The deep water high-block bridge degree bridge construction of the card naked rock river bed trestle construction method of hard stone, which is characterized in that this method include with
Lower step:
Step 1: steel buttress anchors pile driving construction: it constructs respectively to each steel buttress anchor pile of institute's construction bridge, until
Complete the work progress of all steel buttress anchor piles；The construction method of all steel buttress anchor piles is all the same；
When constructing any one described steel buttress anchor pile, process is as follows:
Step 101, drilling: current institute's construction steel buttress anchor pile is from top to bottom drilled through on naked rock river bed using drilling machine
The stake holes；
Step 102, groined type steel buttress lifting: will be pre-machined the molding groined type steel buttress lift and transfer to
In stake holes described in step 101, the groined type steel buttress lower part is set to be located at the middle inside of the stake holes, and make the well word
The bottom end of the every vertical steel pipe is supported in the stake holes bottom in shape steel buttress；
Step 103, anchoring: the concrete perfusion into stake holes described in step 101 obtains after the solidification of institute's concrete perfusion
Obtain the steel buttress anchor structure of construction molding；
Step 2: main beam supporting: being ready to use in after the completion of the steel cofferdam construction of pier in the water of constructing, by institute's construction bridge
Main beam supporting construct in step 1 completion steel buttress anchor pile on, and by the front support of girder on steel cofferdam and leading
The rear end of beam is supported in the supporting table of bank side；
Step 3: floorings are mated formation: floorings of mating formation on the girder described in step 2；
In step 2 middle girder erection process, horizontal operation platform is synchronized and is set up, and by girder and horizontal operation
Platform, which is fastenedly connected, to be integrated.
The above method, it is characterized in that: being bored when being drilled in step 101 using the drilling platform for floating on the water surface
Hole；The construction channel for the steel buttress anchor pile of constructing is provided on the drilling platform, the drilling machine is all-hydraulic impact
Clean-out machine and its be installed on the drilling platform；
When carrying out the lifting of groined type steel buttress in step 102, the groined type steel buttress is lifted and transferred using crane barge
In to the stake holes；
In step 103 into the stake holes when concrete perfusion, it is irrigated using the crane barge.
Compared with the prior art, the present invention has the following advantages:
1, steel buttress anchor pile is reasonable in design, using single pile single-column form, using the single pile groined type steel of major diameter
Buttress, a combination thereof rigidity of structure is big, and resistance flood impact capacity is strong, easy for construction, and groined type steel buttress bottom anchor jail
It leans on, easy construction.The construction quality of steel buttress anchor pile is easy to control, and steel buttress anchoring effect is good, and trestle resists flood impact
Ability is strong, securely and reliably.
2, convenient for disassembly and assembly using floating platform as drilling platform, without in addition setting up drilling platform, it is easy for construction flexibly,
Platform can be facilitated mobile, securely and reliably, save the cost.Drilling platform structure is simple, and raft includes 2 parallel and independent cloth
If platform body substantially saved the dosage of steel while meeting drilling device installation, and it is difficult to greatly reduce construction
Degree；Drilled tunnel is arranged between 2 platform bodies, when drilling construction, will not generate eccentric force, be conducive to the steady of raft
Determining raft includes 2 platform bodies that are parallel and independently laying, and the clear distance between 2 platform bodies is not less than 2.5m,
While meeting drilling device installation, the dosage of steel is substantially saved, and difficulty of construction greatly reduces.Also, 2 flat
It is connected between playscript with stage directions body by crossbeam, the intensity and toughness of crossbeam is larger, increases the impact resistance of platform body, guarantees platform
The stability and globality of ontology.Meanwhile the drilled tunnel for drilling device construction is provided between drilling frame and crossbeam,
It no longer needs to open up drilled tunnel on raft, while the drilled tunnel is arranged between 2 platform bodies, drilling construction
When, eccentric force will not be generated, the stabilization of raft is conducive to；And the setting of bearing beam is the weight for undertaking drilling device,
The dynamic load generated when by the gravity of drilling device and operation buffers, if directly drilling device is arranged on buoyancy tank,
Buoyancy tank can be made to be deformed, influence the bearing capacity of buoyancy tank.Thus, stake position bore position can effectively be ensured using the drilling platform.
3, riverbed is the exposed riverbed of solid rock, and stake holes aperture will not collapse, and does not need installation steel pile casting.
4, construction method is simple, easy construction and using effect are good, using all-hydraulic percussion reverse circulation drill drilling construction,
Using gas lift method borehole cleaning, solid rock will not collapse hole, do not need the measures such as steel pile casting, mud off and mud circulation cleaning quarrel, clearly
Hole effect is good, and easy for construction, speed is fastly, environmental protection is good and saves cost.Trestle is easy to remove after completion, after the completion of engineering construction,
Steel buttress need to only be cut off from riverbed face position and be removed when trestle is removed, met navigation channel and flood control requires, it is convenient to remove.
5, practical value is high and popularization and application foreground is extensive, and versatility is good, can be commonly used to naked rock river bed trestle steel buttress
In anchoring, construction safety is reliable, and easy for construction, speed is fast, saves construction cost.Used steel buttress anchor pile rigidity is big,
Flood fighting water slug ability is strong, easy for construction, saves construction cost, is particularly useful for the only cylindricality formula steel buttress construction of simple trestle.
In conclusion structure of the invention design is reasonable, easy construction, dismounting is convenient and using effect is good, using steel buttress
Anchor pile is firm to be supported on naked rock river bed, and girder rear and front end is respectively supported in steel cofferdam and bank side supporting table, and saving of labor saves
When.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the vertical bridge of the hard naked rock river bed trestle of stone of the present invention to structural schematic diagram.
Fig. 2 is the direction across bridge structural schematic diagram of the naked rock river bed trestle of the hard stone of the present invention.
Fig. 3 is the method flow block diagram when present invention constructs to hard stone naked rock river bed trestle.
Fig. 4 for the used drilling platform of the present invention structural schematic diagram.
Description of symbols:
1-girder；3-floorings；
4-naked rock river beds；5-steel buttress anchor piles；5-1-steel buttress anchor structure；
5-2-vertical steel pipe；5-3-horizontal brace rod；5-4-transverse distribution beam；
6-postive stop baffles；7-protective fences；8-upper distribution beams；
9-longitudinal spacing parts；10-bank side supporting tables；11-steel cofferdams；
12-concrete pumping pipes；13-horizontal operation platforms；13-1-platform body；
13-2-crossbeam；13-3-bearing beam；13-4-anchor ingot.
Specific embodiment
A kind of deep water high-block bridge degree bridge construction as shown in Figure 1 and Figure 2 naked rock river bed trestle of hard stone, including be used for
It constructs the trestle ontology of pier and the horizontal operation platform 13 on front side of the trestle ontology in water, pier is mixed for reinforcing bar in the water
Solidifying knoll；The trestle ontology includes the girder 1 and laying of bottom bracing structure, level frame on the bottom bracing structure
In the floorings 3 on girder 1, the bottom bracing structure includes one or more lower anchors in the steel branch on naked rock river bed 4
Pier anchor pile 5, the steel buttress anchor pile are arranged vertically, and multiple steel buttress anchor piles are supported in girder from the front to the back
1 lower section；The steel cofferdam 11 of the front support of the girder 1 pier in for the water of constructing, the rear end support of the girder 1
In in bank side supporting table 10, bank side supporting table 10 is the support platform being erected on riverbank；The length of the girder 1 is not small
Clear distance between bank side supporting table 10 and steel cofferdam 11, be placed on the floorings 3 in the water of constructing pier it is mixed
Solidifying soil pumping line 12；The horizontal operation platform 13 is erected on steel cofferdam 11, and the horizontal operation platform 13 is connect with girder 1
It is integrated；
The steel buttress anchor pile 5 includes groined type steel buttress and the steel anchored to the groined type steel branch pedestal
Buttress anchor structure 5-1 is drilled with the stake holes for the steel buttress anchor pile lower anchor, the stake on the naked rock river bed 4
Hole is arranged vertically and its depth is not less than 5m, and the groined type steel buttress lower part is located at the middle inside of the stake holes；Institute
State the concrete structure that steel buttress anchor structure 5-1 is the concrete form by injecting in the stake holes, the steel buttress
The height of anchor structure 5-1 is consistent with the depth of the stake holes；The groined type steel buttress includes that four structure snd size are homogeneous
It is fastenedly connected by horizontal brace rod 5-3 between same vertical steel pipe 5-2, adjacent two vertical steel pipe 5-2, the water
Flushconnection bar 5-3 is located above steel buttress anchor structure 5-1；The bottom end of the every vertical steel pipe 5-2 is supported in the stake
Hole bottom, the lower part of the every vertical steel pipe 5-2 are poured into steel buttress anchor structure 5-1.
In the present embodiment, the concrete pumping pipe 12 is laid from the front to the back along the length of girder 1.
Also, the concrete pumping pipe 12 is in horizontal layout.Thus, it can length that is easy, effectively meeting pier in the water
Apart from concrete conveyance demand.
In the present embodiment, the apical side height of bank side supporting table 10 is identical as the overhead height of steel cofferdam 11, the water
The top surface of flat workbench 13 and the top surface flush of floorings 3.
Thus, the top surface of horizontal operation platform 13 and the top surface of floorings 3, thus can largely simplify pier in water
Work progress.Also, while improving the standard 13 overall stability of workbench, the position of steel cofferdam 11 can be carried out effective
Limit.
Wherein, the horizontal operation platform 13 is the workbench for pier in the water of constructing；1 front end of girder with
Horizontal operation platform 13 is connected as one.
When practice of construction, the aperture of the stake holes is φ 2m~φ 3m.The outer diameter of the vertical steel pipe 5-2 be φ 0.6m~
Clear distance between φ 0.65m, adjacent two vertical steel pipe 5-2 is 0.4m~0.7m.Thus, it is according to specific needs, right
The aperture of the stake holes, the vertical steel pipe 5-2 outer diameter and adjacent two vertical steel pipe 5-2 between clear distance difference
It adjusts accordingly.
In the present embodiment, the transverse distribution beam that multiple tracks is laid in same level is provided on the groined type steel buttress
5-4, the transverse distribution beam 5-4 and the perpendicular laying of girder 1, the girder 1 are supported in transverse distribution beam 5-4 described in multiple tracks
On, transverse distribution beam 5-4 described in multiple tracks is in horizontal layout and lays from the front to the back along the length direction of girder 1.
The quantity of laid transverse distribution beam 5-4 is twice, transverse distribution beam described in twice on the groined type steel buttress
5-4 is respectively front side distribution beam and the rear side distribution beam positioned at front side distribution beam rear.
Four vertical steel pipe 5-2 include front side steel pipe and two of two symmetric supports below the front side distribution beam
Rear side steel pipe of the root symmetric support below the rear side distribution beam, two front side steel pipes are in two rear side steel pipes
Symmetrical to lay, two front side steel pipes are symmetrically laid in below the left and right sides of girder 1, two symmetrical cloth of rear side steel pipe
Below the left and right sides of girder 1；The front side distribution beam is weldingly fixed on two front side steel pipes, the rear side point
It is weldingly fixed on two rear side steel pipes with beam.
Pass through horizontal brace rod 5-3 described in the multiple tracks from top to bottom laid between adjacent two vertical steel pipe 5-2
It is fastenedly connected, the horizontal brace rod 5-3 is fashioned iron rod piece and is fixedly connected between vertical steel pipe 5-2 with welding manner.
The postive stop baffle 6 that girder 1 is limited there are two being respectively provided on transverse distribution beam 5-4 described in per pass, the limit
Position baffle 6 is arranged vertically, and two postive stop baffles 6 are symmetrically laid in 1 left and right sides of girder；The postive stop baffle 6
Overhead height is lower than the apical side height of girder 1.
Meanwhile the deep water high-block bridge degree bridge construction of the present invention naked rock river bed trestle of hard stone, it further include twice
It is laid in same level and to the longitudinal spacing part 9 limited at the top of girder 1, the longitudinal spacing part 9 is in horizontal cloth
And if it is laid in parallel with girder 1,1 top card of girder is loaded between longitudinal spacing part 9 described in twice.
In the present embodiment, the upper distribution beam 8 being laid in same level, institute are provided on the girder 1 from the front to the back
Distribution beam 8 is stated in horizontal layout and itself and the perpendicular laying of girder 1；The floorings 3 are paved on upper distribution beam 8 described in multiple tracks
On.
Longitudinal spacing part 9 described in twice is respectively positioned on the lower section of distribution beam 8, longitudinal spacing part 9 described in per pass with multiple tracks institute
It states distribution beam 8 and is fastenedly connected and be integrated.
In the present embodiment, the girder 1 includes the Bailey beam that multiple tracks is laid from left to right, and Bailey beam described in multiple tracks is in perpendicular
Straight Xiang Bushe and its be in parallel laying；Being fastenedly connected between Bailey beam described in adjacent twice by longitudinal connection structure is one
Body, the longitudinal connection structure are the truss frame for connecting being spliced by multiple tracks connecting rod.
In the present embodiment, the floorings 3 are horizontal steel plate, are provided with above the left and right sides of the floorings 3 anti-
Guardrail 7.
In the present embodiment, pier is located on naked rock river bed in the water and it is located at Minjiang Shuikou Reservoir Tail, Fujian at bridge location
River face is open, and bridge zone section is IV grade of navigation channel, and in downstream in the case where not flood discharge, flow velocity is 0.5m/s or so, flood discharge at bridge location
When design current velocity 3.3m/s, design and construct water level+62.5m, 2 years one chance design water level 67m；Riverbed is intectate, exposed base
Rock, riverbed are severely-weathered, weak weathered granite.
Consider that navigation condition, the hydrology, geology and the construction cost in the Min River, the heavily fortified point naked rock river bed trestle of stone of the present invention are adopted
It with simple trestle scheme, is set up from riverbank Xiang Shuizhong pier direction, and the hard naked rock river bed trestle of stone is in water the steel cofferdam of pier
Upstream side, installation and the personnel for meeting concrete pump pipe 12 are current, and construction material and equipment use water transportation Ship Transportation.
In the present embodiment, the quantity of the steel buttress anchor pile 5 is two.
When practice of construction, according to specific needs, the cloth of quantity and each steel buttress anchor pile 5 to steel buttress anchor pile 5
If position adjusts accordingly respectively.
In the present embodiment, the aperture of the stake holes is φ 2.5m and its depth is 6m.It is vertical in the groined type steel buttress
Steel pipe 5-2 is the steel pipe of outer diameter φ 0.63m, and horizontal brace rod 5-3 is I-steel, and four vertical steel pipe 5-2 are connected using I-steel
It connects to form entirety, groined type steel buttress is anchored using steel buttress anchor structure 5-1 (drill-pouring structure), effective anchorage depth is
Strength grade of concrete used in 6m, steel buttress anchor structure 5-1 is C30.
The transverse distribution beam 5-4 is spliced by twice I-steel, transverse distribution beam 5-4 and the groined type steel buttress
Between weld triangle bearing diagonal, Bailey beam is installed on transverse distribution beam 5-4 and is used as trestle main bearing beam, trestle is using deck type
Structure, Bailey beam use three row's single layer structures, are laid with I-steel as bridge floor transverse distribution according to spacing 50cm on Bailey beam top
Beam (i.e. upper distribution beam 8), in bridge floor transverse distribution beam laying depth 6mm steel plate as floorings 3, the width 2.5m of floorings 3,
Bridge floor guardrail (i.e. protective fence 7) is highly 1.2m, and railing is using 75 × 75 × 8mm of ∠ angle steel as railing vertical bar.Trestle region
For prohibited area, navigation mark setting is carried out.
In addition, also needing setting measure of water diversion, " V " font point water plate specifically is set along water surface side in groined type steel buttress,
It avoids floating material from accumulating, increases steel buttress impact resistance.
As shown in figure 3, when constructing to the naked rock river bed trestle of hard stone, comprising the following steps:
Step 1: steel buttress anchors pile driving construction: constructing respectively to each steel buttress anchor pile 5 of institute's construction bridge, directly
To the work progress for completing all steel buttress anchor piles 5；The construction method of all steel buttress anchor piles 5 is all the same；
When constructing any one described steel buttress anchor pile 5, process is as follows:
Step 101, drilling: current institute's construction steel buttress anchor pile is from top to bottom drilled through on naked rock river bed 4 using drilling machine
The stake holes；
Step 102, groined type steel buttress lifting: will be pre-machined the molding groined type steel buttress lift and transfer to
In stake holes described in step 101, the groined type steel buttress lower part is set to be located at the middle inside of the stake holes, and make the well word
The bottom end of the every vertical steel pipe 5-2 is supported in the stake holes bottom in shape steel buttress；
Step 103, anchoring: the concrete perfusion into stake holes described in step 101 obtains after the solidification of institute's concrete perfusion
Obtain the steel buttress anchor structure 5-1 of construction molding；
Step 2: main beam supporting: being ready to use in after the completion of the construction of steel cofferdam 11 of pier in the water of constructing, by institute's construction bridge
Girder 1 be set up on the steel buttress anchor pile 5 for completion of constructing in step 1, and by the front support of girder 1 in steel cofferdam 11
Above and by the rear end of girder 1 it is supported in bank side supporting table 10；
Step 3: floorings are mated formation: floorings 3 of mating formation on the girder 1 described in step 2.
In step 2 middle girder erection process, horizontal operation platform 12 is synchronized and is set up, and by girder 1 and horizontal work
Make platform 12 and be fastenedly connected to be integrated.
In the present embodiment, when being drilled in step 101, drilled using the drilling platform for floating on the water surface；It is described
The construction channel for the steel buttress anchor pile of constructing is provided on drilling platform, the drilling machine is all-hydraulic percussion reverse circulation brill
Machine and its be installed on the drilling platform.
When carrying out the lifting of groined type steel buttress in step 102, the groined type steel buttress is lifted and transferred using crane barge
In to the stake holes；
In step 103 into the stake holes when concrete perfusion, it is irrigated using the crane barge.
The all-hydraulic percussion reverse circulation drill is the all-hydraulic percussion reverse circulation drill of YCJF-25 type, clear using gas lift method
Be cut simultaneously concrete perfusion, is formed concrete clear water structure (i.e. steel buttress anchor structure 5-1).The steel buttress anchor structure 5-1
Valid bonding length be not less than 5m, the heavy quarrel thickness in bottom meets drilled pile construction code requirement；By groined type steel branch before perfusion
Pier is inserted into stake holes, it is ensured that the anchoring of groined type steel buttress is secured；Later, pouring underwater concrete, filling concrete to riverbed face,
Strength grade of concrete is C30, then the groined type steel buttress anchoring is completed, and obtains the steel buttress anchor pile 5 of construction molding.By
It is the exposed riverbed of solid rock in riverbed, installation steel pile casting, mud off and mud is not needed using the steel buttress anchor pile 5 and followed
Ring such as is cut clearly at the measures, only need to cut off groined type steel buttress from riverbed face position when trestle is removed, 5 anchor of steel buttress anchor pile
Gu safe and reliable, easy for construction, speed is fastly, environmental protection is good and saves cost.
After the completion of all steel buttress anchor piles 5 are constructed, transverse distribution beam 5-4 is installed on each steel buttress anchor pile 5,
Bailey beam is installed on transverse distribution beam 5-4 again.When reality installs transverse distribution beam 5-4 and the Bailey beam, use
Crane barge is coupled.Bailey beam transportation by driving after harbour is assembled into pack is installed at bridge location, and Bailey beam bracket uses 90cm type branch
Frame, after the completion of Bailey beam is assembled, all lower boom direction across bridge are integral using I-steel connection, and lower boom and I-steel
Between using U-bolt connect, increase horizontal stability.Bailey beam top is transversely mounted distribution beam 8, then spacing 1.0m is spread
If 6mm steel plate, finally installs guard rail.Due at left and right sides of load-bearing distribution beam and trestle beam-ends head be arranged limit measure
(i.e. postive stop baffle 6 and longitudinal spacing part 9), can effectively increase the stability of trestle.
It when carrying out steel buttress anchoring pile driving construction in step 1, constructs according to construction process for bored pile, sinks quarrel thickness not
Greater than 5cm.Institute's concrete perfusion intensity completes 5 work progress of steel buttress anchor pile after reaching design strength 70% in step 103.
The drilling platform is assembled and boring procedure in, drilling platform is always because under flowing water state and pile foundation construction shakes
In dynamic state, stake holes position need to be detected at any time, the position of the drilling platform is adjusted using windlass, it is ensured that stake holes position is accurate.
As shown in figure 4, in the present embodiment, the drilling platform include drill frame, for the drilling frame installation floating it is flat
Platform and anchoring mechanism for fixing the raft, the raft includes 2 platform body 13-1 laid in parallel,
Clear distance between 2 platform body 13-1 is not less than 2.5m, and 2 platform body 13-1 are connected by crossbeam 13-2,
The length of the crossbeam 13-2 is greater than 2.5m, and the quantity of the crossbeam 13-2 is 2, and 2 crossbeam 13-2 are separately positioned on
The front and rear of the platform body 13-1,2 crossbeam 13-2 with the perpendicular laying of platform body 13-1, institute
The drilled tunnel being provided between drilling frame and the crossbeam 13-2 for the drilling machine construction is stated, the drilling frame, which includes multiple, is in
The bearing beam 13-3 equidistantly laid, multiple bearing beam 13-3 are parallel to each other, the both ends of each bearing beam 13-3 respectively with institute
Platform body 13-1 connection is stated, the length of each bearing beam 13-3 is 12m~16m, the platform body 13-1, crossbeam
13-2 and bearing beam 13-3 are laid on same plane, and each platform body 13-1 is by multiple buoyancy tanks along single laying
Assembled, multiple buoyancy tanks are laid in same level, and the width of each buoyancy tank is 5m~8m；The anchorage machine
Structure includes multiple anchor ingots 4.
In actual use, the raft includes 2 platform body 13-1 laid in parallel, 2 platform bodies
Clear distance between 13-1 is not less than 2.5m, has substantially saved the dosage of steel, and difficulty of construction greatly reduces.
In actual use, the clear distance between 2 platform body 13-1 is not less than 2.5m, and the width of each buoyancy tank
Degree is 5m~8m, can satisfy the size requirement of drilling machine.
In the present embodiment, the weight of the drilling machine main engine is 19t, the weight 8t of tup, the size of drilling machine plane be it is long ×
The stroke of width=7.76m × 2.8m, the buoyancy tank upper ram is controlled in 0.3~0.4m.
In actual use, the connectors such as screw rod, connecting rod are attached between 2 platform body 13-1, preferably
Crossbeam 13-2 connection is subject to be dead load since the platform body 13-1 is not when the drilling device carries out operation, when
When the drilling device carries out bore operation, the dynamic loading that impact generates will receive, therefore to increase the platform body 13-1
Impact resistance, first have to the stability and globality that guarantee platform body 13-1, and the intensity and toughness of crossbeam 13-2 is larger,
It is effectively increased the globality of the platform body 13-1.
In actual use, the length of the crossbeam 13-2 is greater than 2.5m, and the length of the preferred crossbeam 13-2 is 2 institutes
The sum of the clear distance between platform body 13-1 and 2 platform body 13-1 is stated, crossbeam 13-2 and 2 platforms are increased
The connection fixing of ontology 13-1.
In actual use, the setting of the bearing beam 13-3 is the weight for undertaking the drilling device, by the drilling
The dynamic load generated when the gravity of equipment and operation is buffered, if directly the drilling device is arranged in the buoyancy tank
On, the buoyancy tank can be made to be deformed, influence the bearing capacity of the buoyancy tank.
In actual use, each platform body 13-1 is assembled by multiple buoyancy tanks along single laying, preferably
Each of the buoyancy tank laid along longitudinal direction by 2 of the platform body 13-1 it is assembled, and the size of each buoyancy tank are as follows:
Length × width × height=9m × 2.7m × 1.65m.
In actual use, the quantity of the anchoring mechanism is 4 groups, and 4 anchor slabs 5 are fixed on the 4 of the raft
A angle point.
In the present embodiment, the crossbeam 13-2 and the platform body 13-1 are welded.
In actual use, the crossbeam 13-2 and platform body 13-1 can be by bolt or welded connectings, preferably
To be welded to connect, because the dynamic loading generated in the drilling device operation process can make bolt generate loosening, influence described
The reliability connected between crossbeam 13-2 and platform body 13-1, to influence the globality and stabilization of the floating box type drilling platform
Property.
In the present embodiment, the crossbeam 13-2 and the bearing beam 13-3 are i shaped steel.
It in actual use, is I36b I-steel to meet floating box type drilling platform described in the requirement of strength and stiffness.
In the present embodiment, multiple bearing beam 13-3's is centrally disposed in 2 middles platform body 13-1, described in reduction
Raft generates eccentric force, influences the stability of the raft.
In the present embodiment, the anchor ingot 4 is laid in vertical, and the lower end of the anchor ingot 4 is fixed on basement rock, the anchor ingot 4
Upper end and the platform body 13-1 anchor.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (8)
1. a kind of deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone, it is characterised in that: including for water of constructing
The trestle ontology of middle pier and the horizontal operation platform (13) on front side of the trestle ontology, pier is armored concrete in the water
Pier；The trestle ontology include bottom bracing structure, level frame be set to the bottom bracing structure on girder (1) and be layed in
Floorings (3) on girder (1), the bottom bracing structure include one or more lower anchors on naked rock river bed (4)
Steel buttress anchor pile (5), the steel buttress anchor pile are arranged vertically, and multiple steel buttress anchor piles support from the front to the back
Below girder (1)；The steel cofferdam (11) of the front support of the girder (1) pier in for the water of constructing, the master
The rear end of beam (1) is supported in bank side supporting table (10), and bank side supporting table (10) is the support platform being erected on riverbank；
The length of the girder (1) is not less than the clear distance between bank side supporting table (10) and steel cofferdam (11), puts on the floorings (3)
It is equipped with the concrete pumping pipe (12) for pier in the water of constructing；The horizontal operation platform (13) is erected on steel cofferdam (11)
On, the horizontal operation platform (13) is connected as one with girder (1)；
The steel buttress anchor pile (5) includes groined type steel buttress and the steel branch that is anchored to the groined type steel branch pedestal
Pier anchor structure (5-1) is drilled with the stake holes for the steel buttress anchor pile lower anchor on the naked rock river bed (4), described
Stake holes is arranged vertically and its depth is not less than 5m, and the groined type steel buttress lower part is located at the middle inside of the stake holes；
The steel buttress anchor structure (5-1) is the concrete structure of the concrete form by injecting in the stake holes, the steel
The height of buttress anchor structure (5-1) is consistent with the depth of the stake holes；The groined type steel buttress includes four root knot structures and ruler
Very little vertical steel pipe (5-2) all the same is tight by horizontal brace rod (5-3) between adjacent two vertical steel pipes (5-2)
It is solidly connected, the horizontal brace rod (5-3) is located above steel buttress anchor structure (5-1)；Every vertical steel pipe (5-2)
Bottom end is supported in the stake holes bottom, and the lower part of the every vertical steel pipe (5-2) is poured into steel buttress anchor structure (5-
1) in；
The apical side height of bank side supporting table (10) is identical as the overhead height of steel cofferdam (11), the horizontal operation platform
(13) the top surface flush of top surface and floorings (3)；
The transverse distribution beam (5-4) that multiple tracks is laid in same level, the transverse direction are provided on the groined type steel buttress
Distribution beam (5-4) and girder (1) perpendicular laying, the girder (1) is supported on transverse distribution beam (5-4) described in multiple tracks, more
Transverse distribution beam (5-4) described in road is from the front to the back laid in horizontal layout and along the length direction of girder (1).
2. the deep water high-block bridge degree bridge construction described in accordance with the claim 1 naked rock river bed trestle of hard stone, it is characterised in that:
The concrete pumping pipe (12) is laid from the front to the back along the length of girder (1).
3. the deep water high-block bridge degree bridge construction according to claim 1 or 2 naked rock river bed trestle of hard stone, feature exist
In: the aperture of the stake holes is φ 2m~φ 3m.
4. the deep water high-block bridge degree bridge construction according to claim 1 or 2 naked rock river bed trestle of hard stone, feature exist
In: the outer diameter of the vertical steel pipe (5-2) is φ 0.6m~φ 0.65m, net between adjacent two vertical steel pipes (5-2)
Away from for 0.4m~0.7m.
5. the deep water high-block bridge degree bridge construction described in accordance with the claim 1 naked rock river bed trestle of hard stone, it is characterised in that:
The quantity of laid transverse distribution beam (5-4) is twice, transverse distribution beam (5-4) described in twice point on the groined type steel buttress
It Wei not front side distribution beam and the rear side distribution beam positioned at front side distribution beam rear；
Four vertical steel pipes (5-2) include front side steel pipe and two piece of two symmetric supports below the front side distribution beam
Rear side steel pipe of the symmetric support below the rear side distribution beam, two front side steel pipes and two rear side steel pipes are in pair
Claim to lay, two front side steel pipes are symmetrically laid in below the left and right sides of girder (1), two symmetrical cloth of rear side steel pipe
Below the left and right sides of girder (1)；The front side distribution beam is weldingly fixed on two front side steel pipes, the rear side
Distribution beam is weldingly fixed on two rear side steel pipes；
Pass through horizontal brace rod (5-3) described in the multiple tracks from top to bottom laid between adjacent two vertical steel pipes (5-2)
It is fastenedly connected, the horizontal brace rod (5-3) is fashioned iron rod piece and connects between vertical steel pipe (5-2) with welding manner is fixed
It connects；
It is respectively provided on transverse distribution beam (5-4) described in per pass there are two the postive stop baffle (6) limited to girder (1), it is described
Postive stop baffle (6) is arranged vertically, and two postive stop baffles (6) are symmetrically laid at left and right sides of girder (1)；The limit
The overhead height of baffle (6) is lower than the apical side height of girder (1).
6. the deep water high-block bridge degree bridge construction according to claim 1 or 2 naked rock river bed trestle of hard stone, feature exist
In: it further include that twice are laid in same level and to the longitudinal spacing part (9) limited at the top of girder (1), it is described vertical
To locating part (9) in horizontal layout and its lay in parallel with girder (1), girder (1) top card is loaded on vertical described in twice
To between locating part (9)；
The upper distribution beam (8) being laid in same level, the upper distribution beam are provided on the girder (1) from the front to the back
(8) in horizontal layout and itself and girder (1) perpendicular laying；The floorings (3) are paved on distribution beam (8) upper described in multiple tracks
On；
Longitudinal spacing part (9) described in twice is respectively positioned below distribution beam (8), and longitudinal spacing part (9) described in per pass is and multiple tracks
The upper distribution beam (8), which is fastenedly connected, to be integrated；
The girder (1) includes the Bailey beam that multiple tracks is laid from left to right, and Bailey beam described in multiple tracks is arranged vertically and it
Laid in parallel；It is fastenedly connected and is integrated by longitudinal connection structure between Bailey beam described in adjacent twice, the longitudinal direction connects
Binding structure is the truss frame for connecting being spliced by multiple tracks connecting rod；
The floorings (3) are horizontal steel plate, are provided with protective fence (7) above the left and right sides of the floorings (3).
7. a kind of method constructed to trestle as described in claim 1, which is characterized in that method includes the following steps:
Step 1: steel buttress anchors pile driving construction: it constructs respectively to each steel buttress anchor pile (5) of institute's construction bridge, until
Complete the work progress of all steel buttress anchor piles (5)；The construction method of all steel buttress anchor piles (5) is all the same；
When constructing any one described steel buttress anchor pile, process is as follows:
Step 101, drilling: current institute's construction steel buttress anchor pile is from top to bottom drilled through on naked rock river bed (4) using drilling machine
The stake holes；
Step 102, the lifting of groined type steel buttress: the molding groined type steel buttress will be pre-machined and lift and transfer to step
In stake holes described in 101, the groined type steel buttress lower part is set to be located at the middle inside of the stake holes, and make the groined type steel
The bottom end of the every vertical steel pipe (5-2) is supported in the stake holes bottom in buttress；
Step 103, anchoring: the concrete perfusion into stake holes described in step 101 is applied after the solidification of institute's concrete perfusion
The molding steel buttress anchor structure (5-1) of work；
Step 2: main beam supporting: being ready to use in after the completion of steel cofferdam (11) construction of pier in the water of constructing, by institute's construction bridge
Girder (1) is set up on the steel buttress anchor pile (5) for completion of constructing in step 1, and the front support of girder (1) is enclosed in steel
It is supported in bank side supporting table (10) on weir (11) and by the rear end of girder (1)；
Step 3: floorings are mated formation: mating formation on the girder described in step 2 (1) floorings (3)；
In step 2 middle girder erection process, horizontal operation platform (12) is synchronized and is set up, and by girder (1) and horizontal work
Make platform (12) and be fastenedly connected to be integrated.
8. according to the method for claim 7, it is characterised in that: when being drilled in step 101, using floating on the water surface
Drilling platform drills；The construction channel for the steel buttress anchor pile of constructing, the brill are provided on the drilling platform
Machine be all-hydraulic percussion reverse circulation drill and its be installed on the drilling platform；
When carrying out the lifting of groined type steel buttress in step 102, the groined type steel buttress is lifted using crane barge and is transferred to institute
It states in stake holes；
In step 103 into the stake holes when concrete perfusion, it is irrigated using the crane barge.
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| CN109056534B (en) * | 2018-07-19 | 2021-07-20 | 中铁大桥局第九工程有限公司 | Movable cast-in-situ bored pile construction platform and method |
| CN109322241A (en) * | 2018-11-08 | 2019-02-12 | 中建五局土木工程有限公司 | Trestle work structure and construction method |
| CN110552294A (en) * | 2019-09-29 | 2019-12-10 | 中国建筑第八工程局有限公司 | Bridge girder erection machine reverse beam erection construction platform and construction method thereof |
| CN112857305A (en) * | 2019-11-28 | 2021-05-28 | 湖南五新模板有限公司 | Landing stage of detectable deformation state |
| CN112681135B (en) * | 2020-12-14 | 2022-10-11 | 中铁二十局集团第三工程有限公司 | Construction method of n-shaped sea-crossing temporary steel trestle |
| CN112779850B (en) * | 2020-12-31 | 2022-06-28 | 浙大城市学院 | Granular material cargo transporting trestle platform for river-crossing tunnel navigation sealing cofferdam construction and construction method |
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| CN100415995C (en) * | 2005-07-21 | 2008-09-03 | 郑州市华中建筑机械有限公司 | Half span type down guide frame bridging machine and its beam building method |
| CN102953341B (en) * | 2012-12-13 | 2015-10-21 | 中铁上海工程局集团有限公司 | A kind of high-order trestle work structure be arranged in deep water torrent intectate steep bare rock |
| CN102979039B (en) * | 2012-12-13 | 2014-12-03 | 中铁上海工程局集团第二工程有限公司 | Elevated trestle bridge construction method on covering-free steep bare rock in deepwater and rapid stream |
| CN207452738U (en) * | 2017-11-20 | 2018-06-05 | 中铁二十局集团第一工程有限公司 | The deep water high-block bridge degree bridge construction naked rock river bed trestle of hard stone |
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