CN105239573B - The interplantation tube anchor rock construction method of shaped steel trestle - Google Patents

The interplantation tube anchor rock construction method of shaped steel trestle Download PDF

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Publication number
CN105239573B
CN105239573B CN201510713382.7A CN201510713382A CN105239573B CN 105239573 B CN105239573 B CN 105239573B CN 201510713382 A CN201510713382 A CN 201510713382A CN 105239573 B CN105239573 B CN 105239573B
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steel
concrete
trestle
pile
tube
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CN105239573A (en
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张云昊
舒育正
钟凯
徐燕峰
胡敏
徐彬彬
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SECOND BRANCH Co Ltd OF ZHEJIANG TRANSPORTATION ENGINEERING CONSTRUCTION GROUP Co Ltd
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SECOND BRANCH Co Ltd OF ZHEJIANG TRANSPORTATION ENGINEERING CONSTRUCTION GROUP Co Ltd
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Abstract

The present invention relates to the pile foundation construction technical field of shaped steel trestle, aim to provide a kind of interplantation tube anchor rock construction method of shaped steel trestle, including the laying of surveying and locating, leading truck, steel-pipe pile decentralization, horizontal brace welding, concrete pack decentralization, operating platform laying, boring and coring, concrete steel pipe be embedded and several steps such as shaped steel erection is welded.Engineering method of the present invention is implanted into concrete steel pipe inside trestle pile tube, i.e., realizes the stabilization of outside pile tube by the shear resistance for anchoring into concrete steel pipe in rock stratum, this arrives " anchor rock " effect, therefore material installation cost input is small, and the pile tube rate of recovery is high, and whole engineering method technique is simple, it is easy to operate, short construction period.

Description

The interplantation tube anchor rock construction method of shaped steel trestle
Technical field
The present invention relates to the pile foundation construction technical field of shaped steel trestle, is a kind of the interior of shaped steel trestle more specifically Plant pipe anchor rock construction method.
Background technology
Shaped steel trestle is widely used in highway, Wharf Engineering construction field as construction auxiliary temporary structure, especially It is many Wharf Constructions around offshore is without shielding island, offshore side pile foundation is mostly that intectate is embedding according to the difference of geological conditions Rock stake, and without breakwater structure on the outside of segment terminal, trestle is larger by effect of natural conditions such as stormy waves during setting up, surge, Naked rock, scar poor flatness, slope is big, rock strength is high etc. factor turns into jointly restrict trestle pile tube it is stable it is crucial because Element.
How to allow trestle pile tube to keep stable under the conditions of intectate undercurrent, be always the difficulty for perplexing engineering construction One of point.Publication number CN200710300006 Chinese patent discloses a kind of steel tube concrete pile and steel pipe piled anchor rock build-in side Method, specifically first inserting piling steel pile casting, percussive drill is recycled to drill, after percussive drill pore-forming, decentralization steel pipe is (for steel tube concrete Native stake will transfer steel reinforcement cage simultaneously) to design altitude, the pouring underwater concrete in steel pipe, treat underwater concrete along outer wall of steel pipe And between borehole wall on turn to certain altitude after, whole pile concrete is poured, extract steel pile casting, solidify pile;Its shortcoming is Steel pile casting, also steel reinforcement cage etc. are specially set, make quantities big, cycle length.Lack at this stage a kind of for trestle pile tube Difficulty is lower, the faster anchor rock construction method of progress.
The content of the invention
The invention aims to overcome deficiency of the prior art, there is provided one kind can reduce difficulty of construction, accelerate to apply The interplantation tube anchor rock construction method of the shaped steel trestle of work progress.
To achieve these goals, concrete technical scheme of the invention is:
A kind of interplantation tube anchor rock construction method of shaped steel trestle, comprises the following steps:
(1) surveying and locating;
(2) leading truck is laid;The leading truck presses "convex" shaped welding with three shaped steel, and the direction set along crane span structure extends Go out, be also erected with " well " word leading truck for steel-pipe pile decentralization thereon;
(3) steel-pipe pile is transferred;
(4) horizontal brace welds;On the position close to steel-pipe pile bottom, two kinds of horizontal braces of vertical and horizontal are respectively welded For reinforcing;
(5) concrete pack decentralization;The coagulation local product selects strength grade >=C35 maritime concrete, and is constructing Before do Mix Ratio Test, to verify intensity that concrete is reached in initial set, typically to be advisable not less than 12~14MPa;
(6) operating platform is laid;Carried out on the leading truck and the pile tube of preliminarily stabilised put up, complete hidden hole drilling coring Operating platform is laid;Now distribution beam and panel need not weld, and treat to remove leading truck again again after the completion of coring, set up trestle master Distribution beam and panel are welded after beam again;
(7) boring and coring;Pile tube inside center after stable to front-seat initial set carries out hidden hole drilling coring, and coring should enter rock Layer is not less than 2m;
(8) concrete steel pipe is buried;The concrete steel pipe needs scene self-control, i.e., is completed using concrete perfusion in seamless steel pipe, its Length is to be higher by bedrock surface after burying to be not less than 2m;When embedded, the concrete is slipped into using conduit in the hole that coring is completed Steel pipe, then carry out secondary pour;The height poured is preferably higher by concrete steel pipe 10cm;
(9) shaped steel sets up welding;Transverse and longitudinal beam and distribution beam, the erection weldering of panel are carried out on the stable pile tube of anchor rock is completed Connect work.
Technical measures as the further optimization of the present invention also include:
Horizontal brace in the step (4) uses the I-steel not less than I 25 to be made.
The sack of dress concrete in the step (5) selects common jumbo bag, and bag body diameter determines according to steel-pipe pile size, Bag body diameter is preferably greater than more than 1.5 times of pile tube diameter, and length is not less than 1m;Using the original hanger of jumbo bag, worn using manila rope, Pay attention to speed control when decentralization is to pile tube bottom, extract the rope made of hemp out after bottomed.
In the step (7), to ensure perpendicularity in the hole after hidden hole drilling drilling, in its balladeur train bottom after hidden hole drilling is in place One 18# I-steel of locator positioned beneath, I-steel both ends are welded in steel-pipe pile top opening;Its locator compresses horizontal I-shaped On steel, drilling rod and balladeur train swing in boring procedure is avoided to cause inclined hole, bit freezing with this.
Seamless steel pipe in the step (8) can be chosen by calculating horizontal loading that trestle pile tube should bear;It is excellent Elect wall thickness 6mm, external diameter 127mm seamless steel pipe as.
After completing concreting in the seamless steel pipe, also steel beam can be inserted in concrete to strengthen shear resistance; The steel Shu Caiyong rod irons, or be welded together to form with 3 φ 40mm spiral.
In the step (8), a high proportion of accelerator should be also mixed in the secondary concrete poured, to prevent concrete from isolating.
" interplantation tube anchor rock " technique of the present invention, short construction period, speed are fast.So-called " interplantation tube anchor rock ", be by Concrete steel pipe is implanted into inside trestle pile tube to realize the firm purpose of trestle pile tube, substantial principle is to rely on to anchor into concrete in rock stratum The shear resistance of steel pipe makes the stabilization of outside pile tube.
The present invention is applied to without masking marine site, intectate or shallow overburden, and basement rock intensity is high, and minimum tide water level remains above Scar, oblique rock surface degree are less than 1:The 2 steady pile driving construction of trestle steel pipe pile.To overcome scar out-of-flatness and inclination, the present invention utilizes Jumbo bag loads concrete, creates smooth surface layer in pile tube bottom by the mobility of concrete itself, can reach trestle pile tube Balanced to external stabilization;Recycle corning machine to carry out taking hole at trestle pile tube center, the concrete steel pipe of pre-production inserted in the hole, Then casting concrete is closed again, to reach " anchor rock " effect.
Compared with prior art, beneficial effects of the present invention are shown:
1st, inclined rock base pile tube stabilization technique is optimized under naked rock surge condition, and is applied using the pile tube of existing trestle Work, material installation cost input is small, and the pile tube rate of recovery is high.
2nd, anchor rock inside pile tube, the artificial base of ttom of pipe are put down so that structural safety performance is further improved.
3rd, technique is simple, easy to operate, and efficiency of construction is high, and the cycle is short;Its " stool " structure is to meet wanting for various load Ask.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Fig. 2 is the schematic diagram of the steel-pipe pile decentralization of the present invention.
Fig. 3 is the schematic diagram of the packed concrete placings of the present invention.
Fig. 4 is the schematic diagram of the bag concrete initial set of the present invention.
Fig. 5 is the schematic diagram of the hidden hole drilling coring of the present invention.
Fig. 6 is the schematic diagram of the concrete steel pipe decentralization of the present invention.
Fig. 7 is the embedded schematic diagram of the concrete steel pipe of the present invention.
Fig. 8 is the secondary schematic diagram poured of the concrete steel pipe of the present invention.
Schematic diagram when Fig. 9 is steady stake of the invention.
Figure 10 is the mechanics principle figure of structure of the present invention.
In figure:1 pile tube steel pipe;2 concrete steel pipes.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
As shown in figure 1, the interplantation tube anchor rock construction method of the shaped steel trestle of the present invention, including surveying and locating, leading truck paving If, steel-pipe pile decentralization, horizontal brace welding, concrete pack decentralization, operating platform laying, boring and coring, concrete steel pipe bury, shaped steel Set up and weld several steps.
Fig. 2-Fig. 9 is the schematic diagram of the specific steps, says that each step of courage is as follows with reference to Fig. 2-Fig. 9:
(1) surveying and locating
Trestle should draw trestle integral planar, section arrangement detail before setting up in CAD software, with reference to scene practically Shape, drawn by real coordinate position, select erection scheme.It is infrared first with total powerstation alignment, spirit level measurement absolute altitude, utilization Rangefinder measures down the accurate location across pile tube, then repeats the above steps, here notably rangefinder alignment when precision, it is general Flow-through steel trestle is mostly 8.5m mono- across because of the more difficult accurate control in pile tube position in construction, according to practical construction experience, front and rear deviation 10cm should not be exceeded.
(2) leading truck is laid
Influenceed by stormy waves to ensure trestle line style and reducing when pile tube is transferred, should be set up along bridge before pile tube positioning decentralization To leading truck, this set up must it is solid and reliable, steel-pipe pile decentralization positioning and perpendicularity control be required for rely on be oriented to Frame, meanwhile, the drilling of hidden hole drilling after steel-pipe pile decentralization, and the embedding rock consolidation process of pile tube all take the existing guiding of utilization Girder of the frame as construction platform, therefore the selection and welding of leading truck must be solid and reliable.To be easy for construction, three can be directly chosen The long HN60 shaped steel of root 12m uses " convex " font welding manner, separately can voluntarily be selected according to construction site material facility and structural shape Select." well " word leading truck main function when pile tube is transferred is control pipe pile verticality, and this rule of thumb can voluntarily select.
(3) steel-pipe pile is transferred
Offshore is precipitous without the shielding general landform of off-lying sea harbour, and sea situation is more unfavorable, when being placed on construction operation under steel-pipe pile It should avoid selecting astronomical spring tide and the strong time section of fluctuation Teochew opera.Entered as far as possible using the relatively slow period of damp gesture before and after slack tide and slack tide Row construction, it is ensured that construction safety and quality, required pile tube should be first measured before decentralization highly, also application vibration during stake under shallow overburden Hammer jolt ramming into shape.Steel-pipe pile should use with leading truck strengthens steel plate progress butt welding, i.e., is welded with pile tube side wall close to the position of leading truck One block of steel plate, steel plate thickness are not preferably less than 6mm.Because steel-pipe pile and leading truck contact surface are only that a bit, can increase weldering using steel plate Junction is accumulated, and makes the connection of pile tube and leading truck more solid and reliable.
(4) horizontal brace welds
Horizontal brace is divided into two kinds of vertical and horizontal, and which kind of all should be as far as possible close to pile tube bottom, typically minimum Welded during tidal level, be the weld job of " racing against time ", actual stride must be measured in advance, get out respective material, by stormy waves And tidal bore influences, horizontal brace material is not preferably less than I25 I-steel, should set twice if necessary.Because horizontal brace is impossible during welding Welded by theoretical length and pile tube are perfect, at the curtailment of termination steel plate can be used to carry out repair welding, steel plate must be two-sided, i.e., in work Word steel is per side all one piece of repair weldings.
(5) concrete pack decentralization
Coagulation local product selects strength grade >=C35 maritime concrete, considers the erosion of seawater and should fill speed at high proportion Solidifying agent, Mix Ratio Test, the intensity that checking concrete is reached in initial set, typically with not less than 12 are done to concrete before construction ~14MPa is advisable.The sack of dress concrete selects common jumbo bag, and bag body diameter determines that bag body diameter is suitable according to steel-pipe pile size More than more than 1.5 times of pile tube diameter, length is not less than 1m.Using the original hanger of jumbo bag, worn, transferred to pile tube using manila rope Speed control is paid attention to during bottom, extracts the rope made of hemp out after bottomed.Ease of Use platform is set up after concrete initial set, you can carry out coring.
(6) operating platform is laid
Can set up ease of Use platform on the leading truck and the pile tube of preliminarily stabilised put up, now distribution beam and panel without It must weld, only hidden hole drilling coring provides operating platform, treats to remove leading truck again again after the completion of coring, after setting up trestle girder Distribution beam and panel are welded again.
(7) boring and coring
Pile tube inside center after stable to front-seat initial set carries out hidden hole drilling coring, and coring should be not less than 2m into rock stratum. To ensure perpendicularity in the hole after hidden hole drilling drilling, in one 18# of its balladeur train bottom locator positioned beneath after hidden hole drilling is in place I-steel, I-steel both ends are welded in steel-pipe pile top opening.Locator is compressed on horizontal I-steel, is avoided with this in boring procedure Drilling rod and balladeur train, which are swung, causes inclined hole, bit freezing.
(8) concrete steel pipe is buried
" the concrete steel pipe " mentioned in special instruction construction technology is that self manufacture is not the processing of steel pipe producer.Concrete steel pipe utilizes Concrete perfusion is fabricated to concrete filled steel tube rod in seamless steel pipe, and should be higher by bedrock surface after embedded is not less than 2m, and steel pipe can pass through The horizontal loading that should bear of trestle pile tube is calculated to choose.According to practical construction experience, wall thickness 6mm is chosen, external diameter 127mm's Seamless steel pipe, the casting concrete in steel pipe, steel beam is inserted in concrete to strengthen shear resistance, steel Shu Caiyong 3Spiral be welded together to form, across footpath 8.5m, wide 6m shaped steel trestle can bear 70t crawler crane lift heavys 30t The horizontal loading group of beam body and wave force and wind-force.Rod iron can be used directly in conditions permit.In the hole that coring is completed, by taking The pipeline of core machine slips into concrete steel pipe, secondary can be poured after burying.It is secondary pour concrete refer to concrete steel pipe transfer after the completion of it is right again Underwater concrete is poured inside pile tube, the height poured is preferably higher by concrete steel pipe 10cm.Also high ratio should be mixed in the secondary concrete poured The accelerator of example, influence is washed away on concrete to reduce tidal bore, prevents concrete from isolating and can accelerate to solidify, save the time.
(9) shaped steel sets up welding
Transverse and longitudinal beam and distribution beam, the erection welding job of panel are carried out on the stable pile tube of anchor rock is completed, panel is with dividing Welding with beam will arouse attention, and can not slack off, because vehicle and crawler crane are walked on panel, if panel is not connected with distribution beam Integral, deformation necessarily occurs in both panel and distribution beam, causes to scrap, between structure the transmission of power also rely on this.
Other items such as head can select to set up mode when setting up according to site contour, and landform allows directly flatten place Set up, if it is first across also on naked rock, but not by water submerged in the case of, can directly on naked rock casting concrete basis, in base Pre-embedded steel slab and the full welding of pile tube, pile tube are strengthened with steel plate weld from small triangular steel plate in plinth, it is ensured that pile tube is steady It is fixed.
For quality control requirement, with《Highway bridge and culvert construction technique normalizing》(JTG TF 50-2011)、《Steel Structural Design Handbook》、《Reinforcement welding and acceptance specification》(JGJ18-2012) and《Road and bridge construction reckoner》For standard;Specially:
1st, pile tube is just put
After leading truck installs, select to transfer pile tube when low slack tide stormy waves is smaller as far as possible, stood after pile tube is uprightly stable More than J422 welding rods should be selected to be advisable with leading truck firm welding, welding rod, while horizontal brace is immediately following welding.Strictly advised in construction Model welding quality, fusion length and plumpness all should meet code requirement.Because the scope of operation is in marine site, by the corrosivity shadow of seawater Ring, pile tube must brushing antifouling paint.
2nd, bag concrete is transferred
Maritime concrete is fitted into bag after mixing, and jumbo bag is transferred to pile tube bottom by loop wheel machine, and decentralization process is unsuitable too fast, It is too fast that concrete can be made to collide aggravation when meeting seawater face on the contrary, cause concrete disintegration, bag concrete will after being contacted with inclined rock base The rope made of hemp is extracted out, and the mobility of concrete itself can fill the space between pile tube base opening and scar, should be ensured before hidden hole drilling coring Reach the presetting period.
3rd, operating platform is laid
Before drilling, ease of Use platform is set up across trestle to this, because down-the-hole drill fuselage quality is little, distribution beam can not Need to weld, directly put, panel selects the preferable steel plate of flatness, is preferred with newly purchasing steel plate.Simple platform assume responsibility for boring The load being superimposed during the coring of hole, although now panel and distribution beam are unwelded, horizontal brace and bridging must be welded firmly, Test block pressure testing should be first used before rig and worker's upper mounting plate simultaneously, the making of test block can refer to cast-in-situ box girder preloading block.Pressure testing is without asking Rig is gone up after topic again, to ensure property life security.
4th, hidden hole drilling coring
Down-the-hole drill tightly monitors whether pile tube trend and commissure have tear phenomenon in the process of walking.Before drilling Drilling rod perpendicularity must be corrected, selecting pipe pile center position carries out coring.Low-grade precession should be selected when spudding in, after 30cm is goed deep into again Choose high-grade precession.To prevent from back-silting after drilling, limiting the conduit of hidden hole drilling scope wouldn't take out, after the decentralization of concrete steel pipe Row removes directional catheter again.
The engineering method of the present invention fully implements the relevant requirement of national energy-saving engineering, without percussive drill is relied on, saves work Power and plant equipment use, and are filled without generous amount, save the soil body and delay slag resource, while save the time, on the construction period and The upper relative saving of manpower and materials input.
Proved by taking first stage of the project Wharf Engineering that certain faces waterfront area as an example as follows:
Because being located in ridge at 1# access bridge ends of the bridge, both sides are trench, carry out steady stake using artificial lathe mode, input is delayed Slag is unable to estimate, and 100m is long, the wide trestle conservative estimations of 6m put into the side of slag about 10000 that delays, based on 30 yuan/side, then residue material expense of delaying 300,000 yuan are needed, the freight charges of vehicle and slag of delaying are based on 2 yuan every kilometer/side, and haul distance is based on 5 kilometers, then vehicle and the cost of transportation about 10 Wan Yuan, because being located in isolated island, palpus flat board transportation by lighter material, flat board refutes hire charge and lighterage amounts to 200,000 yuan, and artificial lathe must then be spent Take 600,000 yuan of construction costs.
Such as using pile work method is planted after impact drilled as holes, because rock strength is high, often circulation must at least 12 days.Match somebody with somebody by every bench drill machine Standby 4 people, labor wage is based on 220 yuan/day, then 4 people totally 880 yuan/day.13 circulation caused by cost of labor be:12×13 × 880=137280 members, using the every linear meter(lin.m.) of impact drill drilling diameter 1.2m stakes based on 1200 yuan, stake depth are planted based on 2m, then often 2400 yuan of hole machine cost, trestle often calculate across by 3 root canal piles, and 13 across totally 39 pile, then mechanical hole building expense is 93600 yuan, Other expenditure is based on 50,000 yuan.280880 yuan of cost must be spent altogether by then planting pile work method using impact holing.
And the engineering method of the present invention is used, often circulating only needs 3 days, and 13 circulations amount to 39 days, except hidden hole drilling machinery operator Outside, artificial without other increase, coring and steel pipe concrete cost and incidentals only must be about 50,000 yuan.Construction is in cost than artificial lathe About 550,000 yuan of cost is saved, Charpy hole forming method saves about 230,000 yuan.
The engineering method of the present invention can be that provide foundation similar to the steady stake of trestle under sea situation geological conditions, both economized on resources material or Reduce test construction expense;The reference construction method of anchor rock trestle is provided to domestic construction circle simultaneously, promotes construction technology It is progressive.Contrast table is as follows:
Sequence number Engineering method title Cost (ten thousand yuan) Duration Relative system error (ten thousand yuan) With respect to the duration (my god)
1 Interplantation tube anchor rock 5 39 0 0
2 Stake is planted in punching 28 104 -23 -65
3 Artificial lathe 60 60 -55 -21
In addition, Figure 10 is the structural mechanics schematic diagram in the present invention, referred to for explanation.
Finally, it is also noted that, listed above is only the specific embodiment of the present invention.Obviously, the present invention is gone back There can be many deformations, one of ordinary skill in the art directly can export or associate from present disclosure and be all Deformation, is considered as protection scope of the present invention.

Claims (8)

1. a kind of interplantation tube anchor rock construction method of shaped steel trestle, comprises the following steps:
(1) surveying and locating;
(2) leading truck is laid;The leading truck presses "convex" shaped welding with three shaped steel, and the direction set along crane span structure is extended Go, be also erected with " well " word leading truck for steel-pipe pile decentralization thereon;
(3) steel-pipe pile is transferred;
(4) horizontal brace welds;On the position close to steel-pipe pile bottom, two kinds of horizontal braces that vertical and horizontal are respectively welded are used for Reinforce;
(5) concrete pack decentralization;The concrete selects strength grade >=C35 maritime concrete, and does and match somebody with somebody before construction Composition and division in a proportion is tested, to verify that the intensity that concrete is reached in initial set is not less than 12MPa;The sack of dress concrete selects common jumbo bag, Bag body diameter determines that bag body diameter is more than 1.5 times of pile tube diameter, and length is not less than 1m according to steel-pipe pile size;It is former using jumbo bag There is hanger, worn using manila rope, transfer to pile tube bottom, extract the rope made of hemp out after bottomed;
(6) operating platform is laid;Carried out on the leading truck and the pile tube of preliminarily stabilised put up, complete the operation of hidden hole drilling coring Platform is laid;Now distribution beam and panel need not weld, and treat to remove leading truck again again after the completion of coring, after setting up trestle girder Distribution beam and panel are welded again;
(7) boring and coring;Pile tube inside center after stable to front-seat initial set carries out hidden hole drilling coring, and coring should enter rock stratum not Less than 2m;
(8) concrete steel pipe is buried;The concrete steel pipe needs scene self-control, i.e., is completed using concrete perfusion in seamless steel pipe, its length It is not less than 2m to be higher by bedrock surface after embedded;When embedded, the concrete steel pipe is slipped into using conduit in the hole that coring is completed, Then secondary pour is carried out;The height poured is higher by concrete steel pipe 10cm;
(9) shaped steel sets up welding;Transverse and longitudinal beam and distribution beam, the erection Welder of panel are carried out on the stable pile tube of anchor rock is completed Make.
2. the interplantation tube anchor rock construction method of shaped steel trestle according to claim 1, it is characterised in that the step (4) In horizontal brace use and be made not less than I 25 I-steel.
3. the interplantation tube anchor rock construction method of shaped steel trestle according to claim 1, it is characterised in that the step (7) In, should be in its one 18# I-steel of balladeur train bottom locator positioned beneath after hidden hole drilling is in place, I-steel both ends are welded in steel pipe The top opening of stake;Its locator is compressed on horizontal I-steel.
4. the interplantation tube anchor rock construction method of shaped steel trestle according to claim 1, it is characterised in that the step (8) In seamless steel pipe be wall thickness 6mm, external diameter 127mm seamless steel pipe.
5. the interplantation tube anchor rock construction method of the shaped steel trestle according to claim 1 or 4, it is characterised in that in the nothing Stitch after completing concreting in steel pipe, steel beam can be inserted in concrete to strengthen shear resistance.
6. the interplantation tube anchor rock construction method of shaped steel trestle according to claim 5, it is characterised in that the steel beam is steel Rod.
7. the interplantation tube anchor rock construction method of shaped steel trestle according to claim 5, it is characterised in that the steel Shu Caiyong 3Spiral weld together and be made.
8. the interplantation tube anchor rock construction method of shaped steel trestle according to claim 1, it is characterised in that the step (8) In, a high proportion of accelerator should be also mixed in the secondary concrete poured and is isolated to prevent concrete.
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CN108103939B (en) * 2017-12-08 2020-04-10 中交路桥北方工程有限公司 Combined reinforcement mode and construction process for construction of oblique-section steel trestle
CN109056710B (en) * 2018-08-24 2021-05-14 中国建筑一局(集团)有限公司 Hard stratum steel pipe pile and construction method thereof

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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
CN102966111B (en) * 2012-12-13 2016-01-27 中铁上海工程局集团第二工程有限公司 A kind of steel pipe pile anchoring construction method in deep water torrent intectate steep bare rock
CN203222798U (en) * 2013-04-20 2013-10-02 中铁十六局集团第四工程有限公司 Guiding frame applied to piling of steel piles in trestle construction on exposed bedrock
CN103898910A (en) * 2014-03-10 2014-07-02 中交一航局第三工程有限公司 Method for anchoring trestle steel pipe piles on seabed rock bare landform
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CN104947654B (en) * 2015-07-01 2017-01-18 山东金城建设有限公司 Complicated water area inclined rock face large-diameter cast-in-place pile construction method

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