CN109024236A - A kind of steel trestle and its construction method - Google Patents
A kind of steel trestle and its construction method Download PDFInfo
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- CN109024236A CN109024236A CN201810975496.2A CN201810975496A CN109024236A CN 109024236 A CN109024236 A CN 109024236A CN 201810975496 A CN201810975496 A CN 201810975496A CN 109024236 A CN109024236 A CN 109024236A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 439
- 239000010959 steel Substances 0.000 title claims abstract description 439
- 238000010276 construction Methods 0.000 title claims abstract description 150
- 230000000875 corresponding Effects 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 116
- 230000002787 reinforcement Effects 0.000 claims description 69
- 239000010410 layers Substances 0.000 claims description 16
- 239000002689 soil Substances 0.000 claims description 16
- 239000004568 cements Substances 0.000 claims description 7
- 210000003205 Muscles Anatomy 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000000034 methods Methods 0.000 abstract description 26
- 230000002829 reduced Effects 0.000 abstract description 12
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 40
- 238000007789 sealing Methods 0.000 description 37
- 230000000694 effects Effects 0.000 description 15
- 238000003780 insertion Methods 0.000 description 12
- 239000003351 stiffeners Substances 0.000 description 9
- 238000010586 diagrams Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 230000002093 peripheral Effects 0.000 description 6
- 238000004901 spalling Methods 0.000 description 6
- 230000003014 reinforcing Effects 0.000 description 5
- 210000000614 Ribs Anatomy 0.000 description 4
- 230000003628 erosive Effects 0.000 description 4
- 230000003116 impacting Effects 0.000 description 4
- 230000036961 partial Effects 0.000 description 4
- 230000003319 supportive Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 239000000203 mixtures Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000000463 materials Substances 0.000 description 2
- 235000015170 shellfish Nutrition 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 208000008425 Protein Deficiency Diseases 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000003139 buffering Effects 0.000 description 1
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- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste materials Substances 0.000 description 1
- 239000011901 water Substances 0.000 description 1
Classifications
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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
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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
- 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
- E02D5/40—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds in open water
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
Description
Technical field
The present invention relates to the realm of building construction, in particular to a kind of steel trestle and its construction method.
Background technique
In construction engineering technical field, when being related to across the river engineering of cross a river, if river does not allow large vessel carrier equipment It marches into the arena or marches into the arena as auxiliary construction equipment, it usually needs auxiliary construction channel is set on river, ensures to construct with this It goes on smoothly.
Current auxiliary construction channel generally includes pontoon bridge, steel trestle and manually builds island etc., is directed to and different actually applies Work situation carries out the selection of corresponding construction, for example, it is more rapid for water flow, it should not select and manually build island and pontoon structure conduct The river in auxiliary construction channel, steel trestle structure just become relatively conventional selection.
For current steel trestle structure, beam body both ends are directly overlapped on abutment, in practice of construction, although energy More reliable support is accessed, but in further research process, inventor has found that it, there is also there is deficiency, specifically exists In abutment is usually concrete structure, and finite stiffness when beam body is loaded excessive, can usually damage abutment concrete；It is another The bearing height of aspect, abutment is fixed, it is difficult to is adjusted according to actual needs to the bearing height of beam body on abutment.
So need to design at present one kind can either secure support beam body, and adjustment beam body bearing height can be facilitated Steel trestle structure.
Summary of the invention
It is an object of the invention to: in current steel trestle structure, the existing above problem, providing one kind can either can By supporting beam body, and the steel trestle structure of adjustment beam body bearing height can be facilitated.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of hardpan steel-pipe pile, including at least two steel pipes, the steel pipe bottom are abutted against with hardpan, the steel pipe It is provided with drilling on the corresponding hardpan in inner space, concrete is perfused in the drilling, institute is expired in the concreting Continue to upwardly extend after stating drilling, the part for making the concrete form cylinder is located in the steel pipe.
For current steel trestle structure, mainly including pier stake and the beam body being arranged in pier stake, beam body is generallyd use Several beret slices are spliced, and pier stake is usually to use steel-pipe pile, in construction, need to squeeze into steel-pipe pile into soil layer, steel The length that tubular pole enters soil layer has to reach design length, but is sandy gravel below steel-pipe pile in practice of construction When the hardpans such as layer, steel-pipe pile is difficult to continue to squeeze into, and causes steel-pipe pile insertion depth inadequate, in order to ensure steel-pipe pile support Reliability, current usual way is that the periphery of Design of Steel-tube Piles position is first arranged in the steel pipe being relatively large in diameter, then in steel It drills on sand pebble layer in pipe, then the casting concrete in drilling, steel-pipe pile is inserted into concrete before concrete initial set, Although such steel tube pile structure also can be consolidated more, it needs first to be arranged compared with large steel pipe, then in compared with large steel pipe It is drilled, the operation of casting concrete and insertion steel-pipe pile, on the one hand such mode is the construction work of installation and dismounting Sequence is various, is added significantly to construction cost and duration, also, since the insertion of steel-pipe pile is carried out in large steel pipe, steel-pipe pile Bottom insertion contraposition is difficult to accurately guarantee, so being difficult to control the construction precision of steel-pipe pile；In another aspect, before concrete initial set It is inserted into steel-pipe pile, the insertion depth of steel-pipe pile is more difficult to control, is easy to appear the problems such as insertion is too deep.
So the hardpan steel-pipe pile of the application, when construction, when steel pipe sink down into hardpan can not further under It when heavy, protruded into and is drilled by drilling machine, then the concrete perfusion in drilling, behind filling concrete fully-jewelled hole, continue to be perfused, So that concrete column a part that hardening is formed is located in drilling, a part is located in steel pipe, consolidates in this way, realizing to steel pipe Fixed, for traditional approach, form of construction work is simple, has not only significantly simplified working procedure, but also can be deep by drilling The height of degree and steel pipe inner concrete to carry out coordinated control to the structural strength and stability of steel-pipe pile, convenient for guaranteeing steel-pipe pile Stability and reliability.
Preferably, the steel pipe lower end is embedded in the hardpan, makes lower end and the end portion of the steel pipe Lateral wall fits with the hardpan.This kind of mode makes in steel pipe end portion insertion hardpan, steel pipe end portion Hardpan in step-like so that hardpan also acts as good support action, a side to steel pipe lower end and peripheral sidewall Face is the structural strength and stability for further improving steel-pipe pile, on the other hand, the effect of positioning steel tube is also acted as, rear In continuous construction, steel pipe is avoided to shift.So the construction quality of steel-pipe pile is also improved, in another aspect, each end portion is hard Quality layer also acts as the effect of hoop, avoids each internal pressure excessive and causes steel pipe lower end by spalling, so, also further The structural stability for improving the application steel-pipe pile.
Preferably, the concrete height in the steel pipe is the 1/4~1/3 of the length of steel pipe.Inventors have found that It, being capable of good stable steel pipe when steel pipe inner concrete uses above-mentioned height.
Preferably, sealing plate is additionally provided in the steel pipe top.It is on the one hand to make steel pipe top flat by the way that sealing plate is arranged Whole, convenient to carry out secure support to superstructure, on the other hand, sealing plate can also prevent building waste and rainwater etc. from falling into steel Pipe, it is ensured that steel pipe inner wall and inner concrete are not damaged.
Preferably, it is fixedly connected by the way of being fully welded between the sealing plate and the steel pipe.In this way, sealing plate also rises To the effect for reinforcing steel pipe top, reduce steel pipe top risk of distortion.
Preferably, the sealing plate outer rim forms flange plate beyond the outer wall of steel pipe, in the flange plate and the steel pipe Several stiffeners are provided between lateral wall.By this kind of mode, the further area for expanding sealing plate, and added by setting Strength plate also improves the reliability connected between sealing plate and steel pipe, and improves the reliability and stabilization supported to superstructure Property.
Preferably, bridging is also connected between adjacent steel pipe, the bridging is to be made using profile in X-type cross. By the way that bridging is arranged, improve the stability of relative position between steel pipe, also improve the structural stability of steel-pipe pile entirety with Reliability.
As a preferred mode, cooperated by the way of on-fixed connection between the profile of the bridging.Work as steel When tubular pole is hit, such as when earthquake, the stress of each steel pipe is had differences, so in this application, between the profile of bridging Using revocable connection type, relatively flexible connection is formed between steel pipe, in this way, further improving the support of steel-pipe pile Reliability.
Preferably, lateral is additionally provided on the sealing plate, the lateral connects each steel of same steel-pipe pile along direction across bridge Pipe.
Preferably, the lateral includes at least two I-steel mutually spliced along direction across bridge.
By the setting of lateral, each steel pipe of same steel-pipe pile is connected, forms the support platform of support superstructure.
Preferably, steel reinforcement cage is additionally provided in the concrete, the steel reinforcement cage bottom is located in the drilling, top In the steel pipe.The structural strength that steel pipe inner concrete column is improved by setting steel reinforcement cage, further improves to steel The reliability that pipe is reinforced.
Preferably, the steel reinforcement cage includes several main reinforcement and several hoops of being vertically provided in the stirrup in main ribs, Main ribs lower end is tip shape and exceeds the hoop, is embedded in the hardpan of the foot of hole.The application's In scheme, tip shape is set by vertical main reinforcement lower end, after steel reinforcement cage is packed into drilling, main reinforcement lower end is facilitated to be inserted into hardpan It is interior, in this way, be on the one hand further to improve the support reliability of steel pipe inner concrete column, also, in concreting, The risk for causing steel reinforcement cage to shift because of concrete impact is also reduced, further ensure steel pipe inner concrete column pours matter Amount.
Preferably, it is the reinforcing bar of 16mm as main reinforcement and stirrup that the steel reinforcement cage, which uses diameter, and main reinforcement spacing is 10cm, hoop Muscle spacing is 20cm.
Preferably, the concrete is C30 concrete.
Disclosed herein as well is a kind of construction methods of hardpan steel-pipe pile, include the following steps:
A, it lifts: steel pipe is lifted to by design position using hanging apparatus；
B, sink: steel pipe being hammered using vibration hammer, steel pipe is made to be inserted into soil layer, up to steel pipe lower end to hardpan；
C, drill: drilled using drilling device to the hardpan below steel duct space, drilling depth be greater than or Equal to the projected depth of steel pipe insert into stratum；
D, concreting: the concrete perfusion in the drilling that step c is formed, concreting continue to pour after expiring the drilling It builds, makes in filling concrete to steel pipe, and reach design height.
It is compared under the premise of ensuring to be formed steel-pipe pile with excellent support reliability using the construction method of the application In conventional steel pilework, construction more simplifies, and construction cost can not only be greatly reduced, and can also substantially shorten construction Duration；Moreover, also can easily ensure the position precision of steel pipe construction, steel-pipe pile construction quality is improved.
Preferably, in the step c, before drilling, steel pipe is connected with the front end of overhanging Bailey beam, it is ensured that steel pipe It is in a vertical state in drilling.On the one hand it is to ensure that the infusion of steel pipe, guarantees steel-pipe pile construction quality, on the other hand, steel pipe It is in a vertical state, can be using steel pipe as benchmark in drilling, and then easily guarantee the vertical of drilling.
When preferably, at drilling to steel pipe lower end, drilling progress, and the cement being added are reduced, at steel pipe base opening After stratum side wall carries out retaining wall, then normal drilling.It is herein the boundary of soil layer and hardpan when drilling to steel pipe lower end Place, so, drilling progress is reduced here, and stratum is avoided to be mutated and cause to damage to drilling equipment, meanwhile, reinforce concentration of hydraulic mixture Detection, heating cement carry out retaining wall, on the one hand be reduce friction, reduce bit wear, be on the other hand also prevented from drilling and collapse Danger.
Preferably, steel reinforcement cage is additionally provided in the drilling, the steel reinforcement cage bottom is located in the drilling, and top is located at In the steel pipe, in the step d, before concreting, first by the reinforcement cage hoisting to the drilling, then carry out Concrete pours work.By the way that steel reinforcement cage is arranged, the structural strength of steel pipe inner concrete is improved, and then improve the knot of steel-pipe pile Structure strength and stability.
Preferably, in the step d, after the steel reinforcement cage is placed into drilling, steel reinforcement cage is hammered using vibration hammer, is made In the stratum of the end portion insertion drilling lower section of the steel reinforcement cage.By the hardpan of the end portion insertion lower section of steel reinforcement cage In, it is on the one hand the structural stability for improving the stake of steel pipe inner concrete, on the other hand, it is thus also avoided that in subsequent construction, for example (,) it is mixed When solidifying soil pours, the risk that steel reinforcement cage is shifted because being impacted so improves the construction quality of steel pipe inner concrete column.
Preferably, in the step c, after drilling, steel pipe is hammered using vibration hammer, makes the end portion of steel pipe It is embedded into hardpan.Steel pipe end portion is embedded into hardpan, makes in steel pipe end portion insertion hardpan, steel The hardpan of pipe end portion is in step-like, so that hardpan also acts as good supporting to steel pipe lower end and peripheral sidewall Effect, is on the one hand the structural strength and stability for further improving steel-pipe pile, on the other hand, also acts as positioning steel tube Effect, in subsequent construction, avoids steel pipe from shifting.So the construction quality of steel-pipe pile is also improved, in another aspect, each lower end Partial hardpan also acts as the effect of hoop, avoids each internal pressure excessive and causes steel pipe lower end by spalling, so, Also the structural stability of the application steel-pipe pile is further improved；Also, it is further, due in boring procedure, drilling machine Hardpan is impacted, after the completion of drilling, hardpan topmost edge part is more loose because of impact, so at this In application, after the completion of drilling, steel pipe is further impacted, steel pipe is made further to sink, across hardpan top section On the one hand weaker zone is to make hardpan form step to carry out supporting to steel pipe bottom end side wall, on the other hand but also hard Layer can provide reliable support for steel pipe in the vertical direction, in this way, further ensure the stability of steel-pipe pile with can By property.
It is further preferred that the depth that the steel pipe end portion is embedded into hardpan is the 1/10~1/ of drilling depth 9。
It preferably, further include step e, the construction of steel pipe top in the construction method of the hardpan steel-pipe pile: to steel pipe After interior concreting is complete, steel pipe tip height is measured,
When steel pipe top is lower than design height, the steel pipe segment for lifting by crane appropriate length is docked, and is reached steel pipe top and is set Meter height；
When steel pipe top is higher than design height, pipe cutting top makes steel pipe top reach design height.In the work of the application In sequence, the cutting or welding splicing on steel pipe top are carried out after steel pipe impact process again, is avoided in impact process to spelling Binding structure bring adverse effect, while but also steel pipe top is more smooth, avoid steel pipe top due to blastic deformation to after Continuous construction brings adverse effect.
Preferably, in the step e, when steel pipe top reaches design height, sealing plate is set on steel pipe top, is then existed It is fully welded stiffener between the flange plate and steel pipe lateral wall of sealing plate, then is also connected with bridging between adjacent steel pipe, then on sealing plate I-steel is also set up as lateral.
Preferably, the steel-pipe pile includes several steel pipes, by carry out the step a and b of root, is then set up between steel pipe For carrying the carrying platform of drilling machine.In the construction method of application itself, carrying platform is arranged between steel pipe, is facilitated It while drilling construction, has also further ensured that in boring procedure, the stabilization of steel pipe.
Preferably, the carrying platform is built using beret slice.
Disclosed herein as well is a kind of steel trestle,
A kind of steel trestle, including several steel-pipe piles and the beam body that is arranged on the steel-pipe pile, the beam body along bridge to two It holds corresponding riverbank or builds and be provided with the abutment for being used to support beam body on island, be provided on the abutment and be used to support beam body The support profile of end.
The steel trestle of the application, the setting support profile on abutment, increases abutment forced area, and then improves abutment support Reliability, and can be by selecting the profile of suitable dimension to realize adjustment to bearing height, and then realize, Abutment beam The adjustment of body height；
Particularly, the bonding strength between the beam body and support profile is occurred damaging strong less than the beam body by impact Degree, when beam body be hit power it is larger when, beam body be detached from profile, be overlapped on abutment, in this way, when beam body be hit power it is larger when, Beam body damage is avoided, also, when impact force is especially big, beam body is overlapped on abutment, provides further buffering by abutment Support reduces construction loss to ensure the safety of worker and structural device on beam.
Preferably, the support profile includes at least two I-steel arranged side by side, the lower side wing of the I-steel It is fixedly connected with the abutment, is fixedly connected between the upper side wing of the I-steel.Form support side by side using I-steel Profile, structure is simple, facilitates acquisition, and can also reuse；
Particularly, i-beam structure vertically has web support, and web is vertical plate-like, when beam body by along bridge to load When, web can be improved certain elastic deformation space, reduce beam body by along bridge to there is the risk of blastic deformation when impact.
Preferably, the beam body is along to the beam body segment at both ends being to be obliquely installed along bridge, the support profile with it is described Wedge cushion block is additionally provided between beam body, the upside of the correcting wedge is to match skewed, wedge piece with the beam body The downside of block is connected with the support profile.The beam body segment at beam body both ends is obliquely installed, when beam body is overlapped on abutment Be it is skewed, be more advantageous to abutment and the support force that incrementally increases formed to beam body, the cushioning supportive being gradually increased is provided, with this into The reduction beam body of one step is damaged, and ensures the safety of worker and structural device on beam, reduces construction loss.
Preferably, protection against erosion sandbag is covered on the soil body below the abutment.By the way that protection against erosion sandbag is arranged, it is ensured that The safety of the soil body below abutment.
Preferably, the beam body includes several beam body segments, and the beam body segment is spliced using beret slice, the shellfish Thunder piece is arranged in the lateral of the steel-pipe pile, and connecting cross beam corresponding with the lateral is provided on the beret slice, described Connecting cross beam is arranged along direction across bridge, and is pressed together on the upside of the beret slice lower boom, in the connecting cross beam and the lateral Between be also connected with vertical bar.Beam body segment is formed using beret slice assembly, beam body is being formed by beam body section assembling, in this way, side Just the spelling of beam body.
Preferably, bridge deck structure is provided on the beam body segment, the bridge deck structure includes being laid in the beam body Several first distribution beams, and several second distribution beams being arranged in first distribution beam, first distribution beam and the Two distribution beams are perpendicular, and the bridge deck structure further includes the bridge surface armor plate being laid in second distribution beam.Pass through first point On the one hand setting with beam and the second distribution beam is to carry out secure support to superstructure and load, on the other hand, also further The structural strength for strengthening beam body itself.
Preferably, between the beam body and first distribution beam, first distribution beam and second distribution beam it Between and second distribution beam and the bridge surface armor plate between to be fixedly connected.
Preferably, first distribution beam is to be arranged along direction across bridge in I-steel, the lower side wing of first distribution beam It being fixedly connected with the beam body, the upper side wing of first distribution beam is fixedly connected with second distribution beam, and described second Distribution beam is along bridge, to being arranged in channel steel, the web of second distribution beam is vertically arranged.
Preferably, be spaced apart of adjacent second distribution beam has distance, the opening direction of the second distribution beam channel steel The middle part of beam body direction across bridge.The opening of channel steel can effectively avoid in the groove of the insertions such as sundries all notches towards beam body middle part.
Preferably, when Design of Steel-tube Piles position is hardpan, when steel pipe is difficult to be inserted into projected depth, using above-mentioned Hardpan steel-pipe pile.The steel trestle of the application is stablized using above-mentioned hardpan steel-pipe pile so that being formed by steel-pipe pile Reliably, and working procedure has been significantly simplified, has reduced construction cost.
Disclosed herein as well is a kind of steel trestle construction method,
A kind of steel trestle construction method, includes the following steps:
A, lifting first across with second across steel-pipe pile: first across with second across Design of Steel-tube Piles position carry out steel-pipe pile Construction；
B, build first across with the second bridge body: step A formed steel-pipe pile on build first across with the second bridge body；
C, build next bridge body: hanging device lifts by crane next bridge body section in the beam body put up, and carries out after contraposition Installation forms overhanging girder construction；
D, steel pipe pile driving construction: hanging device is moved in the overhanging girder construction of step C, and carries out the construction of steel-pipe pile；
Step C and D are repeated, until last bridge body section is built and finished.
The construction method of the application, hanging device carry out by cross subsequent beam body and steel-pipe pile in the beam body put up Construction, avoids the process for building operation platform in river, and then significantly simplified construction, shortens the construction period, reduces Construction cost.
Preferably, in the step A and step D, when Design of Steel-tube Piles position is hardpan, steel pipe is difficult to be inserted into and set When counting depth, using the construction method of hardpan steel-pipe pile.
The steel trestle construction method of the application, when Design of Steel-tube Piles position is hardpan, using above-mentioned hardpan The construction method of steel-pipe pile, in this way, also further ensuring the safety and reliability that steel-pipe pile is supported；Also, also substantially Working procedure is simplified, the construction period is shortened, reduces construction cost.
Preferably, in the step A, further include abutment construction, first across with before the second across steel pipe pile driving construction or When construction, construct to abutment.In this way, also further shortening the construction period.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, the steel trestle of the application, the setting support profile on abutment, increases abutment forced area, and then improves abutment support Reliability, and can be by selecting the profile of suitable dimension to realize the adjustment to bearing height, and then realize, Abutment beam body The adjustment of height；Particularly, the bonding strength between the beam body and support profile is less than the beam body and is damaged by impact Bad intensity, when beam body be hit power it is larger when, beam body be detached from profile, be overlapped on abutment, in this way, when beam body be hit power compared with When big, beam body damage is avoided, also, when impact force is especially big, beam body is overlapped on abutment, is provided by abutment further Cushioning supportive reduces construction loss to ensure the safety of worker and structural device on beam；
2, the steel trestle construction method of the application, hanging device carry out subsequent beam body and steel-pipe pile in the beam body put up It constructs by cross, avoids the process for building operation platform in river, and then significantly simplified construction, shorten the construction period, Construction cost is reduced, when Design of Steel-tube Piles position is hardpan, using the construction method of above-mentioned hardpan steel-pipe pile, In this way, also further ensuring the safety and reliability that steel-pipe pile is supported；Also, working procedure is also significantly simplified, has been contracted The short construction period, reduce construction cost.
Detailed description of the invention
Fig. 1 is the partial structural diagram of hardpan steel-pipe pile steel pipe end portion；
Fig. 2 is the structural schematic diagram of steel-pipe pile and beam body cooperation
Fig. 3 is the structural schematic diagram at another visual angle of steel-pipe pile and beam body cooperation,
Fig. 4 is the partial enlarged view in Fig. 3 at A,
Fig. 5 is the structural schematic diagram of steel trestle,
Fig. 6 is the structural schematic diagram of steel trestle Abutment,
Fig. 7 is the partial enlarged view in Fig. 6 at B,
Fig. 8 is the step schematic diagram of steel trestle steel trestle construction method,
Fig. 9 is the step block diagram of hardpan steel pipe pile construction method,
Marked in the figure: 1- steel pipe, 2- hardpan, 3- soil layer, 4- concrete column, 5- sealing plate, 6- stiffener, 7- scissors Support, 8- lateral, 9- steel reinforcement cage, 10- beam body, 11- abutment, 12- support profile, the first distribution beam of 13-, the second distribution beam of 14-, 15- hanging device.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.
Embodiment 1, as shown in figs 1-9,
A kind of hardpan steel-pipe pile, including at least two steel pipes 1,1 bottom of steel pipe is abutted against with hardpan 2, described It is provided with drilling on the corresponding hardpan 2 in 1 inner space of steel pipe, concrete is perfused in the drilling, the concrete pours Continue to upwardly extend after building the completely described drilling, the part for making the concrete form cylinder is located in the steel pipe 1.
The hardpan steel-pipe pile of the present embodiment, when construction, when steel pipe 1 sink down into hardpan 2 can not further under It when heavy, protruded into and is drilled by drilling machine, then the concrete perfusion in drilling, behind filling concrete fully-jewelled hole, continue to be perfused, So that 4 a part of concrete column that hardening is formed is located in drilling, a part is located in steel pipe 1, in this way, realizing to steel pipe 1 Fixation, for traditional approach, form of construction work is simple, has not only significantly simplified working procedure, but also can pass through brill The height of 1 inner concrete of hole depth and steel pipe to carry out coordinated control to the structural strength and stability of steel-pipe pile, convenient for guaranteeing The stability and reliability of steel-pipe pile.
Mode as a further preference, 1 lower end of steel pipe are embedded in the hardpan 2, make under the steel pipe 1 The lateral wall of end and end portion fits with the hardpan 2.This kind of mode makes 1 end portion of steel pipe be embedded in hard In stratum 2, the hardpan 2 of 1 end portion of steel pipe in step-like so that hardpan 2 to 1 lower end of steel pipe and peripheral sidewall also Good support action is played, is on the one hand the structural strength and stability for further improving steel-pipe pile, on the other hand, also Play the role of positioning steel tube 1, in subsequent construction, steel pipe 1 is avoided to shift.So the construction quality of steel-pipe pile is also improved, In another aspect, the hardpan 2 of each end portion also acts as the effect of hoop, avoids each internal pressure excessive and cause steel 1 lower end of pipe by spalling, so, also further improve the structural stability of the present embodiment steel-pipe pile.
Mode as a further preference, the concrete height in the steel pipe 1 are the 1/4 of 1 length of steel pipe ~1/3.Inventors have found that when 1 inner concrete of steel pipe uses above-mentioned height, it being capable of good stable steel pipe 1.
Mode as a further preference is additionally provided with sealing plate 5 at the top of the steel pipe 1.By the way that sealing plate 5, a side is arranged Face is to keep 1 top of steel pipe smooth, convenient to carry out secure support to superstructure, and on the other hand, sealing plate 5 can also prevent building rubbish Rubbish and rainwater etc. fall into steel pipe 1, it is ensured that 1 inner wall of steel pipe and inner concrete are not damaged.
Mode as a further preference, between the sealing plate 5 and the steel pipe 1 by the way of being fully welded the company of being fixed It connects.In this way, sealing plate 5 also acts as the effect for reinforcing 1 top of steel pipe, reduce 1 top risk of distortion of steel pipe.
Mode as a further preference, 5 outer rim of sealing plate forms flange plate beyond 1 outer wall of steel pipe, described Several stiffeners 6 are provided between 1 lateral wall of flange plate and the steel pipe.By this kind of mode, further expansion sealing plate 5 Area, and by setting stiffener 6, the reliability connected between sealing plate 5 and steel pipe 1 is also improved, and improve to top The reliability and stability of structural support.
Mode as a further preference, bridging 7 is also connected between adjacent steel pipe 1, and the bridging 7 is using type Material is made in X-type cross.By the way that bridging 7 is arranged, the stability of relative position between steel pipe 1 is improved, steel-pipe pile is also improved Whole structural stability and reliability.
As a kind of mode mode as a further preference, connected between the profile of the bridging 7 using on-fixed Mode cooperate.When steel-pipe pile is hit, such as when earthquake, the stress of each steel pipe 1 is had differences, so in the present embodiment In, revocable connection type is used between the profile of bridging 7, forms relatively flexible connection between steel pipe 1, in this way, into The support reliability of the raising steel-pipe pile of one step.
Mode as a further preference, lateral 8 is additionally provided on the sealing plate 5, and the lateral 8 is same along direction across bridge connection Each steel pipe 1 of one steel-pipe pile.
Mode as a further preference, the lateral 8 include at least two I-steel mutually spliced along direction across bridge.
By the setting of lateral 8, each steel pipe 1 of same steel-pipe pile is connected, forms the support platform of support superstructure.
Mode as a further preference is additionally provided with steel reinforcement cage 9, the 9 bottom position of steel reinforcement cage in the concrete In in the drilling, top is located in the steel pipe 1.The structure for improving 1 inner concrete column of steel pipe by setting steel reinforcement cage 9 is strong Degree further improves the reliability reinforced to steel pipe 1.
Mode as a further preference, the steel reinforcement cage 9 include several main reinforcements and several hoops of being vertically provided in institute The stirrup in main reinforcement is stated, main ribs lower end is tip shape and exceeds the hoop, with being embedded in the hard of the foot of hole In layer 2.In the scheme of the present embodiment, tip shape is set by vertical main reinforcement lower end, it is convenient after steel reinforcement cage 9 is packed into drilling Main reinforcement lower end be inserted into hardpan 2 in, in this way, on the one hand be further improve 1 inner concrete column of steel pipe support it is reliable Property, also, in concreting, the risk for causing steel reinforcement cage 9 to shift because of concrete impact is also reduced, is further ensured that The pouring quality of 1 inner concrete column of steel pipe.
Mode as a further preference, it is the reinforcing bar of 16mm as main reinforcement and stirrup that the steel reinforcement cage 9, which uses diameter, main Muscle spacing is 10cm, stirrup spacing 20cm.
Mode as a further preference, the concrete are C30 concrete.
Embodiment 2, as shown in figs 1-9:
A kind of construction method of hardpan steel-pipe pile, includes the following steps:
A, it lifts: steel pipe 1 is lifted to by design position using hanging apparatus；
B, sink: steel pipe 1 being hammered using vibration hammer, steel pipe 1 is made to be inserted into soil layer, up to 1 lower end of steel pipe to hardpan 2；
C, drill: drilled using drilling device to the hardpan 2 below 1 inner space of steel pipe, drilling depth be greater than or Person is equal to the projected depth of 1 insert into stratum of steel pipe；
D, concreting: the concrete perfusion in the drilling that step c is formed, concreting continue to pour after expiring the drilling It builds, makes in filling concrete to steel pipe 1, and reach design height.
Using the construction method of the present embodiment, under the premise of ensuring to be formed steel-pipe pile with excellent support reliability, phase Compared with conventional steel pilework, construction more simplifies, and construction cost can not only be greatly reduced, and can also substantially shorten and apply The work duration；Moreover, also can easily ensure the position precision that steel pipe 1 is constructed, steel-pipe pile construction quality is improved.
Mode as a further preference, in the step c, before drilling, by the front end of steel pipe 1 and overhanging Bailey beam It is connected, it is ensured that steel pipe 1 is in a vertical state in drilling.On the one hand it is to ensure that the infusion of steel pipe 1, guarantees steel pipe pile driving construction matter Amount, on the other hand, steel pipe 1 is in a vertical state, can be using steel pipe 1 as benchmark in drilling, and then easily guarantees to drill It is vertical.
Mode as a further preference when at drilling to 1 lower end of steel pipe, reduces drilling progress, and the cement being added, After carrying out retaining wall to the stratum side wall at 1 base opening of steel pipe, then normal drilling.It is herein soil layer when drilling to 1 lower end of steel pipe 3 with the intersection of hardpan 2, so, reduce drilling progress here, stratum avoided to be mutated and cause to damage to drilling equipment Wound, meanwhile, reinforce the detection of concentration of hydraulic mixture, heating cement carries out retaining wall, is on the one hand to reduce friction, reduces bit wear, separately On the one hand it is also prevented from the danger that drilling is collapsed.
Mode as a further preference is additionally provided with steel reinforcement cage 9 in the drilling, and 9 bottom of steel reinforcement cage is located at institute It states in drilling, top is located in the steel pipe 1, in the step d, before concreting, first lifts by crane the steel reinforcement cage 9 To in the drilling, then carry out concrete pour work.By the way that steel reinforcement cage 9 is arranged, the structure for improving 1 inner concrete of steel pipe is strong Degree, and then improve the structural strength and stability of steel-pipe pile.
Mode as a further preference, in the step d, after the steel reinforcement cage 9 is placed into drilling, using vibration Hammer hammering steel reinforcement cage 9, is embedded in the end portion of the steel reinforcement cage 9 in the stratum of drilling lower section.By the end portion of steel reinforcement cage 9 It is embedded in the hardpan 2 of lower section, is on the one hand on the other hand the structural stability for improving 1 inner concrete stake of steel pipe also avoids In subsequent construction, such as when concreting, the risk that steel reinforcement cage 9 is shifted because being impacted so is improved in steel pipe 1 and is mixed The construction quality of solidifying earth pillar.
Mode as a further preference after drilling, hammers steel pipe 1 using vibration hammer in the step c, It is embedded into the end portion of steel pipe 1 in hardpan 2.1 end portion of steel pipe is embedded into hardpan 2, makes 1 lower end of steel pipe It is partially submerged into hardpan 2, the hardpan 2 of 1 end portion of steel pipe is in step-like, so that hardpan 2 is to 1 lower end of steel pipe Good support action is also acted as with peripheral sidewall, is on the one hand the structural strength and stabilization for further improving steel-pipe pile Property, on the other hand, the effect of positioning steel tube 1 is also acted as, in subsequent construction, steel pipe 1 is avoided to shift.So also improving steel pipe The construction quality of stake avoids each internal pressure in another aspect, the hardpan 2 of each end portion also acts as the effect of hoop Power is excessive and causes 1 lower end of steel pipe by spalling, so, also further improve the structural stability of the present embodiment steel-pipe pile； Also, it is further, since in boring procedure, drilling machine impacts hardpan 2, after the completion of drilling, hardpan 2 Topmost edge part is more loose because of impact, so in the present embodiment, after the completion of drilling, further impacting steel pipe 1, making Steel pipe 1 further sinks, and is on the one hand that hardpan 2 is made to form step pair across the weaker zone of 2 top section of hardpan 1 bottom end side wall of steel pipe carries out supporting, on the other hand but also hardpan 2 can provide reliably for steel pipe 1 in the vertical direction Support, in this way, further ensuring the stability and reliability of steel-pipe pile.
It is further used as further preferred embodiment, 1 end portion of steel pipe is embedded into the depth of hardpan 2 to bore The 1/10~1/9 of hole depth.
Mode as a further preference further includes step e, steel pipe 1 in the construction method of the hardpan steel-pipe pile Top construction: after the concreting in steel pipe 1 is complete, measuring 1 tip height of steel pipe,
When 1 top of steel pipe is lower than design height, 1 segment of steel pipe for lifting by crane appropriate length is docked, and 1 top of steel pipe is reached Design height；
When 1 top of steel pipe is higher than design height, 1 top of pipe cutting makes 1 top of steel pipe reach design height.In this implementation In the process of example, steel pipe 1 carries out the cutting or welding splicing on 1 top of steel pipe again after impacting process, avoids and impacted Splicing construction bring is adversely affected in journey, while but also 1 top of steel pipe is more smooth, avoids 1 top of steel pipe because of impact It deforms and brings adverse effect to subsequent construction.
Mode as a further preference in the step e, when 1 top of steel pipe reaches design height, is pushed up in steel pipe 1 End setting sealing plate 5, is then fully welded stiffener 6, then between adjacent steel pipe 1 also between 1 lateral wall of the flange plate of sealing plate 5 and steel pipe Bridging 7 is connected, then also sets up I-steel as lateral 8 on sealing plate 5.
Mode as a further preference, the steel-pipe pile include several steel pipes 1, by carry out the step a and b of root, so The carrying platform for carrying drilling machine is set up between steel pipe 1 afterwards.In the construction method of application itself, carrying platform is arranged It between steel pipe 1, while facilitating drilling construction, has also further ensured that in boring procedure, the stabilization of steel pipe 1.
Mode as a further preference, the carrying platform are built using beret slice.
Embodiment 3, as shown in figs 1-9,
A kind of steel trestle, including several steel-pipe piles and the beam body 10 that is arranged on the steel-pipe pile, the beam body 10 along bridge to The corresponding riverbank in both ends or build and be provided with the abutment 11 for being used to support beam body 10 on island, be arranged on the abutment 11 useful Support profile 12 in support 10 end of beam body.
The steel trestle of the present embodiment, the setting support profile 12 on abutment 11, increases 11 forced area of abutment, and then improve The reliability that abutment 11 supports, and can be by selecting the profile of suitable dimension to realize the adjustment to bearing height, Jin Ershi It is existing, the adjustment of 10 height of beam body at abutment 11；
Particularly, the bonding strength between the beam body 10 and support profile 12 is less than the beam body 10 and is damaged by impact Intensity, when beam body 10 be hit power it is larger when, beam body 10 is detached from profile, is overlapped on abutment 11, in this way, being rushed when beam body 10 Hit power it is larger when, avoid the damage of beam body 10, also, when impact force is especially big, beam body 10 is overlapped on abutment 11, by abutment 11 provide further cushioning supportive, to ensure the safety of worker and structural device on beam, reduce construction loss.
Mode as a further preference, the support profile 12 includes at least two I-steel arranged side by side, described The lower side wing of I-steel is fixedly connected with the abutment 11, is fixedly connected between the upper side wing of the I-steel.Using I-steel forms support profile 12 side by side, and structure is simple, facilitates acquisition, and can also reuse；
Particularly, i-beam structure vertically has web support, and web is vertical plate-like, when beam body 10 by along bridge to load When, web can be improved certain elastic deformation space, reduce beam body 10 by along bridge to there is the risk of blastic deformation when impact.
Mode as a further preference, the beam body 10 is obliquely installed along bridge to the beam body segment at both ends, in institute It states and is additionally provided with wedge cushion block between support profile 12 and the beam body 10, the upside of the correcting wedge is and the beam body 10 What is matched is skewed, and the downside of correcting wedge is connected with the support profile 12.The beam body segment at 10 both ends of beam body tilts Setting is more advantageous to abutment 11 and forms the branch incrementally increased to beam body 10 when beam body 10 is overlapped on abutment 11 to be skewed Support force provides the cushioning supportive being gradually increased, and is damaged with this further beam body 10 that reduces, and ensure worker and structure on beam The safety of equipment reduces construction loss.
Mode as a further preference is covered with protection against erosion sandbag on the soil body below the abutment 11.By setting Set protection against erosion sandbag, it is ensured that the safety of the 11 lower section soil body of abutment.
Mode as a further preference, the beam body 10 include several beam body segments, and the beam body segment uses shellfish thunder Piece is spliced, and the beret slice is arranged in the lateral 8 of the steel-pipe pile, is provided on the beret slice and the lateral 8 Corresponding connecting cross beam, the connecting cross beam is arranged along direction across bridge, and is pressed together on the upside of the beret slice lower boom, described Vertical bar is also connected between connecting cross beam and the lateral 8.Beam body segment is formed using beret slice assembly, is spelled by beam body segment Dress forms beam body 10, in this way, facilitating the spelling of beam body 10.
Mode as a further preference, bridge deck structure is provided on the beam body segment, and the bridge deck structure includes paving Several first distribution beams 13 being located in the beam body 10, and several second distribution beams being arranged in first distribution beam 13 14, first distribution beam 13 and the second distribution beam 14 are perpendicular, and the bridge deck structure further includes being laid on second distribution Bridge surface armor plate on beam 14.It is on the one hand to superstructure and load by the setting of the first distribution beam 13 and the second distribution beam 14 Lotus carries out secure support and on the other hand also further strengthens the structural strength of beam body 10 itself.
Mode as a further preference, between the beam body 10 and first distribution beam 13, first distribution beam It between 13 and second distribution beam 14 and is to be fixedly connected between second distribution beam 14 and the bridge surface armor plate.
Mode as a further preference, first distribution beam 13 are along direction across bridge setting in I-steel, described first The lower side wing of distribution beam 13 is fixedly connected with the beam body 10, the upper side wing of first distribution beam 13 with described second point It is fixedly connected with beam 14, second distribution beam 14 is along bridge, to being arranged in channel steel, the web of second distribution beam 14 is It is vertically arranged.
Mode as a further preference, adjacent be spaced apart of second distribution beam 14 have distance, second distribution The opening of 14 channel steel of beam is towards the middle part of 10 direction across bridge of beam body.The opening of channel steel can be avoided effectively miscellaneous towards 10 middle part of beam body In the groove of the insertions such as object all notches.
Mode as a further preference, when Design of Steel-tube Piles position is hardpan 2, steel pipe 1 is difficult to be inserted into design When depth, using hardpan steel-pipe pile.The steel trestle of the present embodiment, using above-mentioned hardpan steel-pipe pile, so that institute's shape At steel-pipe pile it is reliable and stable, and significantly simplified working procedure, reduced construction cost.
The hardpan steel-pipe pile, including at least two steel pipes 1,1 bottom of steel pipe are abutted against with hardpan 2, It is provided with drilling on the corresponding hardpan 2 in 1 inner space of steel pipe, concrete, the coagulation are perfused in the drilling Soil continues to upwardly extend after pouring the completely described drilling, and the part for making the concrete form cylinder is located in the steel pipe 1.
The hardpan steel-pipe pile of the present embodiment, when construction, when steel pipe 1 sink down into hardpan 2 can not further under It when heavy, protruded into and is drilled by drilling machine, then the concrete perfusion in drilling, behind filling concrete fully-jewelled hole, continue to be perfused, So that 4 a part of concrete column that hardening is formed is located in drilling, a part is located in steel pipe 1, in this way, realizing to steel pipe 1 Fixation, for traditional approach, form of construction work is simple, has not only significantly simplified working procedure, but also can pass through brill The height of 1 inner concrete of hole depth and steel pipe to carry out coordinated control to the structural strength and stability of steel-pipe pile, convenient for guaranteeing The stability and reliability of steel-pipe pile.
Mode as a further preference, 1 lower end of steel pipe are embedded in the hardpan 2, make under the steel pipe 1 The lateral wall of end and end portion fits with the hardpan 2.This kind of mode makes 1 end portion of steel pipe be embedded in hard In stratum 2, the hardpan 2 of 1 end portion of steel pipe in step-like so that hardpan 2 to 1 lower end of steel pipe and peripheral sidewall also Good support action is played, is on the one hand the structural strength and stability for further improving steel-pipe pile, on the other hand, also Play the role of positioning steel tube 1, in subsequent construction, steel pipe 1 is avoided to shift.So the construction quality of steel-pipe pile is also improved, In another aspect, the hardpan 2 of each end portion also acts as the effect of hoop, avoids each internal pressure excessive and cause steel 1 lower end of pipe by spalling, so, also further improve the structural stability of the present embodiment steel-pipe pile.
Mode as a further preference, the concrete height in the steel pipe 1 are the 1/4 of 1 length of steel pipe ~1/3.Inventors have found that when 1 inner concrete of steel pipe uses above-mentioned height, it being capable of good stable steel pipe 1.
Mode as a further preference is additionally provided with sealing plate 5 at the top of the steel pipe 1.By the way that sealing plate 5, a side is arranged Face is to keep 1 top of steel pipe smooth, convenient to carry out secure support to superstructure, and on the other hand, sealing plate 5 can also prevent building rubbish Rubbish and rainwater etc. fall into steel pipe 1, it is ensured that 1 inner wall of steel pipe and inner concrete are not damaged.
Mode as a further preference, between the sealing plate 5 and the steel pipe 1 by the way of being fully welded the company of being fixed It connects.In this way, sealing plate 5 also acts as the effect for reinforcing 1 top of steel pipe, reduce 1 top risk of distortion of steel pipe.
Mode as a further preference, 5 outer rim of sealing plate forms flange plate beyond 1 outer wall of steel pipe, described Several stiffeners 6 are provided between 1 lateral wall of flange plate and the steel pipe.By this kind of mode, further expansion sealing plate 5 Area, and by setting stiffener 6, the reliability connected between sealing plate 5 and steel pipe 1 is also improved, and improve to top The reliability and stability of structural support.
Mode as a further preference, bridging 7 is also connected between adjacent steel pipe 1, and the bridging 7 is using type Material is made in X-type cross.By the way that bridging 7 is arranged, the stability of relative position between steel pipe 1 is improved, steel-pipe pile is also improved Whole structural stability and reliability.
As a kind of mode mode as a further preference, connected between the profile of the bridging 7 using on-fixed Mode cooperate.When steel-pipe pile is hit, such as when earthquake, the stress of each steel pipe 1 is had differences, so in the present embodiment In, revocable connection type is used between the profile of bridging 7, forms relatively flexible connection between steel pipe 1, in this way, into The support reliability of the raising steel-pipe pile of one step.
Mode as a further preference, lateral 8 is additionally provided on the sealing plate 5, and the lateral 8 is same along direction across bridge connection Each steel pipe 1 of one steel-pipe pile.
Mode as a further preference, the lateral 8 include at least two I-steel mutually spliced along direction across bridge.
By the setting of lateral 8, each steel pipe 1 of same steel-pipe pile is connected, forms the support platform of support superstructure.
Mode as a further preference is additionally provided with steel reinforcement cage 9, the 9 bottom position of steel reinforcement cage in the concrete In in the drilling, top is located in the steel pipe 1.The structure for improving 1 inner concrete column of steel pipe by setting steel reinforcement cage 9 is strong Degree further improves the reliability reinforced to steel pipe 1.
Mode as a further preference, the steel reinforcement cage 9 include several main reinforcements and several hoops of being vertically provided in institute The stirrup in main reinforcement is stated, main ribs lower end is tip shape and exceeds the hoop, with being embedded in the hard of the foot of hole In layer 2.In the scheme of the present embodiment, tip shape is set by vertical main reinforcement lower end, it is convenient after steel reinforcement cage 9 is packed into drilling Main reinforcement lower end be inserted into hardpan 2 in, in this way, on the one hand be further improve 1 inner concrete column of steel pipe support it is reliable Property, also, in concreting, the risk for causing steel reinforcement cage 9 to shift because of concrete impact is also reduced, is further ensured that The pouring quality of 1 inner concrete column of steel pipe.
Mode as a further preference, it is the reinforcing bar of 16mm as main reinforcement and stirrup that the steel reinforcement cage 9, which uses diameter, main Muscle spacing is 10cm, stirrup spacing 20cm.
Mode as a further preference, the concrete are C30 concrete
Embodiment 4, as shown in figs 1-9:
A kind of steel trestle construction method, includes the following steps:
A, lifting first across with second across steel-pipe pile: first across with second across Design of Steel-tube Piles position carry out steel-pipe pile Construction；
B, build first across with the second bridge body 10: step A formed steel-pipe pile on build first across with the second bridge body 10；
C, build next bridge body 10: hanging device 15 lifts by crane next bridge body section in the beam body 10 put up, contraposition After installed, formed overhanging girder construction；
D, steel pipe pile driving construction: hanging device 15 is moved in the overhanging girder construction of step C, and carries out the construction of steel-pipe pile；
Step C and D are repeated, until last bridge body section is built and finished.
The construction method of the present embodiment, hanging device 15 is in the beam body 10 put up to subsequent beam body 10 and steel-pipe pile It is constructed by cross, avoids the process for building operation platform in river, and then significantly simplified construction, shorten construction work Phase reduces construction cost.
Mode as a further preference, in the step A and step D, when Design of Steel-tube Piles position is hardpan 2, When steel pipe 1 is difficult to be inserted into projected depth, using the construction method of hardpan steel-pipe pile.
The steel trestle construction method of the present embodiment, when Design of Steel-tube Piles position is hardpan 2, using hardpan steel pipe The construction method of stake, in this way, also further ensuring the safety and reliability that steel-pipe pile is supported；Also, it also significantly simplifies Working procedure, shortens the construction period, reduces construction cost.
The construction method of the hardpan steel-pipe pile, includes the following steps:
A, it lifts: steel pipe 1 is lifted to by design position using hanging apparatus；
B, sink: steel pipe 1 being hammered using vibration hammer, steel pipe 1 is made to be inserted into soil layer, up to 1 lower end of steel pipe to hardpan 2；
C, drill: drilled using drilling device to the hardpan 2 below 1 inner space of steel pipe, drilling depth be greater than or Person is equal to the projected depth of 1 insert into stratum of steel pipe；
D, concreting: the concrete perfusion in the drilling that step c is formed, concreting continue to pour after expiring the drilling It builds, makes in filling concrete to steel pipe 1, and reach design height.
Using the construction method of the present embodiment, under the premise of ensuring to be formed steel-pipe pile with excellent support reliability, phase Compared with conventional steel pilework, construction more simplifies, and construction cost can not only be greatly reduced, and can also substantially shorten and apply The work duration；Moreover, also can easily ensure the position precision that steel pipe 1 is constructed, steel-pipe pile construction quality is improved.
Mode as a further preference, in the step c, before drilling, by the front end of steel pipe 1 and overhanging Bailey beam It is connected, it is ensured that steel pipe 1 is in a vertical state in drilling.On the one hand it is to ensure that the infusion of steel pipe 1, guarantees steel pipe pile driving construction matter Amount, on the other hand, steel pipe 1 is in a vertical state, can be using steel pipe 1 as benchmark in drilling, and then easily guarantees to drill It is vertical.
Mode as a further preference when at drilling to 1 lower end of steel pipe, reduces drilling progress, and the cement being added, After carrying out retaining wall to the stratum side wall at 1 base opening of steel pipe, then normal drilling.It is herein soil layer when drilling to 1 lower end of steel pipe 3 with the intersection of hardpan 2, so, reduce drilling progress here, stratum avoided to be mutated and cause to damage to drilling equipment Wound, meanwhile, reinforce the detection of concentration of hydraulic mixture, heating cement carries out retaining wall, is on the one hand to reduce friction, reduces bit wear, separately On the one hand it is also prevented from the danger that drilling is collapsed.
Mode as a further preference is additionally provided with steel reinforcement cage 9 in the drilling, and 9 bottom of steel reinforcement cage is located at institute It states in drilling, top is located in the steel pipe 1, in the step d, before concreting, first lifts by crane the steel reinforcement cage 9 To in the drilling, then carry out concrete pour work.By the way that steel reinforcement cage 9 is arranged, the structure for improving 1 inner concrete of steel pipe is strong Degree, and then improve the structural strength and stability of steel-pipe pile.
Mode as a further preference, in the step d, after the steel reinforcement cage 9 is placed into drilling, using vibration Hammer hammering steel reinforcement cage 9, is embedded in the end portion of the steel reinforcement cage 9 in the stratum of drilling lower section.By the end portion of steel reinforcement cage 9 It is embedded in the hardpan 2 of lower section, is on the one hand on the other hand the structural stability for improving 1 inner concrete stake of steel pipe also avoids In subsequent construction, such as when concreting, the risk that steel reinforcement cage 9 is shifted because being impacted so is improved in steel pipe 1 and is mixed The construction quality of solidifying earth pillar.
Mode as a further preference after drilling, hammers steel pipe 1 using vibration hammer in the step c, It is embedded into the end portion of steel pipe 1 in hardpan 2.1 end portion of steel pipe is embedded into hardpan 2, makes 1 lower end of steel pipe It is partially submerged into hardpan 2, the hardpan 2 of 1 end portion of steel pipe is in step-like, so that hardpan 2 is to 1 lower end of steel pipe Good support action is also acted as with peripheral sidewall, is on the one hand the structural strength and stabilization for further improving steel-pipe pile Property, on the other hand, the effect of positioning steel tube 1 is also acted as, in subsequent construction, steel pipe 1 is avoided to shift.So also improving steel pipe The construction quality of stake avoids each internal pressure in another aspect, the hardpan 2 of each end portion also acts as the effect of hoop Power is excessive and causes 1 lower end of steel pipe by spalling, so, also further improve the structural stability of the present embodiment steel-pipe pile； Also, it is further, since in boring procedure, drilling machine impacts hardpan 2, after the completion of drilling, hardpan 2 Topmost edge part is more loose because of impact, so in the present embodiment, after the completion of drilling, further impacting steel pipe 1, making Steel pipe 1 further sinks, and is on the one hand that hardpan 2 is made to form step pair across the weaker zone of 2 top section of hardpan 1 bottom end side wall of steel pipe carries out supporting, on the other hand but also hardpan 2 can provide reliably for steel pipe 1 in the vertical direction Support, in this way, further ensuring the stability and reliability of steel-pipe pile.
It is further used as further preferred embodiment, 1 end portion of steel pipe is embedded into the depth of hardpan 2 to bore The 1/10~1/9 of hole depth.
Mode as a further preference further includes step e, steel pipe 1 in the construction method of 2 steel-pipe pile of hardpan Top construction: after the concreting in steel pipe 1 is complete, measuring 1 tip height of steel pipe,
When 1 top of steel pipe is lower than design height, 1 segment of steel pipe for lifting by crane appropriate length is docked, and 1 top of steel pipe is reached Design height；
When 1 top of steel pipe is higher than design height, 1 top of pipe cutting makes 1 top of steel pipe reach design height.In this implementation In the process of example, steel pipe 1 carries out the cutting or welding splicing on 1 top of steel pipe again after impacting process, avoids and impacted Splicing construction bring is adversely affected in journey, while but also 1 top of steel pipe is more smooth, avoids 1 top of steel pipe because of impact It deforms and brings adverse effect to subsequent construction.
Mode as a further preference in the step e, when 1 top of steel pipe reaches design height, is pushed up in steel pipe 1 End setting sealing plate 5, is then fully welded stiffener 6, then between adjacent steel pipe 1 also between 1 lateral wall of the flange plate of sealing plate 5 and steel pipe Bridging 7 is connected, then also sets up I-steel as lateral 8 on sealing plate 5.
Mode as a further preference, the steel-pipe pile include several steel pipes 1, by carry out the step a and b of root, so The carrying platform for carrying drilling machine is set up between steel pipe 1 afterwards.In the construction method of application itself, carrying platform is arranged It between steel pipe 1, while facilitating drilling construction, has also further ensured that in boring procedure, the stabilization of steel pipe 1.
Mode as a further preference, the carrying platform are built using beret slice
Mode as a further preference, in the step A, further include abutment 11 construct, first across with second across steel pipe Before pile driving construction or when constructing, construct to abutment 11.In this way, also further shortening the construction period.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (10)
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| 段军、李宏杰: "《高原坝区高速公路施工实用新技术》", 31 July 2016, 西南交通大学出版社 * |
| 肖军: "《多座贝雷梁钢桥抢险加固的几点体会》", 《重庆建筑》 * |
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