CN107747314A - A kind of construction method of combined beam type supporting pile pit supporting construction - Google Patents
A kind of construction method of combined beam type supporting pile pit supporting construction Download PDFInfo
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- CN107747314A CN107747314A CN201710408248.5A CN201710408248A CN107747314A CN 107747314 A CN107747314 A CN 107747314A CN 201710408248 A CN201710408248 A CN 201710408248A CN 107747314 A CN107747314 A CN 107747314A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- General Life Sciences & Earth Sciences (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of construction method of combined beam type supporting pile pit supporting construction, specifically comprise the following steps：Beam type support pile examines installation → H profile steel construction of installation → beam type support pile of lifting stacking → leading truck of lubrication → beam type support pile → bracing members and steel purlin set up and installed → to pull out.It is an object of the invention to provide a kind of construction method of combined beam type supporting pile pit supporting construction, combining structure can give full play to the advantages of beam type support pile and H profile steel, by H profile steel as on the inside of foundation ditch, connection is not set between H profile steel and beam type support pile, because H profile steel is as on the inside of foundation ditch, in Excavation Process, outer lateral earth pressure pressing beam formula support pile, beam type support pile deforms to inner side, beam type support pile and H profile steel stick together naturally, common eigenvector, the overall structure rigidity of formation is big, have earth-retaining water stopping function concurrently, quick construction, simply, system easy to control the quality, reusable edible, it is cost-effective.
Description
Technical field
The present invention relates to the realm of building construction, and in particular to a kind of construction of combined beam type supporting pile pit supporting construction
Method.
Background technology
With expanding economy, the quickening of urbanization paces, to meet that growing citizens' activities, track traffic are changed
Multiply, business, the needs of the function such as parking, in the dense urban centers that land used is more nervous, developed with reference to construction and reform works in downtown district
Large Underground space has turned into a kind of inevitable, multilayer basement of high-rise building, underground railway and underground station, road tunnel,
Lower garage parking, underground street, market place builet below the ground, underground hospital, underground substation, underground storehouse, underground civil defence fortification and a variety of
Underground is civilian and industrial plants etc..
Hot rolling beam type support pile is a kind of hot rolling with fore shaft or jaw（Or clod wash) Section-steel Piles, fore shaft or pincers are leaned on after squeezing into
Mouth is connected with each other occlusion, forms continuous beam type support pile system, for earth-retaining and dash, has light-duty, quick construction spy
Point, is recycled, better economy.Shortcoming is that anti-side rigidity is relatively small, and deformation is larger, and it is unfavorable that surrounding environment is protected.And H
Shaped steel all has the advantages that strong bending resistance, construction is simple and lightweight construction in all directions, at present in base pit engineering
Be mainly used in SMW engineering method stakes, be the shortcomings that H profile steel can earth-retaining, but can not sealing.
The content of the invention
Goal of the invention：It is an object of the invention to provide a kind of construction of combined beam type supporting pile pit supporting construction
Method, the advantages of combining structure can give full play to beam type support pile and H profile steel, by H profile steel as on the inside of foundation ditch, H profile steel and
Connection is not set between beam type support pile, because H profile steel is as on the inside of foundation ditch, in Excavation Process, outer lateral earth pressure pressing beam
Formula support pile, beam type support pile deform to inner side, and beam type support pile and H profile steel stick together naturally, common eigenvector, formation it is whole
The body rigidity of structure is big, has earth-retaining water stopping function concurrently, quick construction, simple, system easy to control the quality, reusable edible, cost-effective.
Technical scheme：A kind of construction method of combined beam type supporting pile pit supporting construction, specifically comprises the following steps：
A, beam type support pile examines lubrication：
After beam type support pile transports to building site, the debris in fore shaft is cleared up, then the overall lock for checking beam type support pile
Mouth and pile body, are repaired to rejected region；
Qualified beam type support pile surface is examined uniformly to smear miscella, miscella presses body by butter, dry bentonite and dry saw foam
Product ratio 5:5:3 are mixed；
B, the lifting of beam type support pile is stacked
It will check that the beam type support pile handled well carries out being hoisted to region to be onstructed using or 3 points of forms of hanging early stage at 2 points, stack
When select flat and firm place to be layered to stack, stack quantity for every layer and be no more than 5, each interlayer want bolster wood, sleeper spacing
Generally 3-4 rice, and upper and lower layer sleeper should be on same vertical line, the total height of stacking is no more than 2 meters；
C, the installation of leading truck
Piling location axis is set：Orientation axis is being set to be offset when preventing piling wait area of driving piles, because backfilling of earthwork produces
Raw soil pressure can cause oblique, 5 ~ 10cm of piling location axial direction landwards side skew, in piling location axis before beam type support pile
After it is determined that, piling beginning and end is set, and sets point of observation on axis extended line；
Parallel to orientation axis both sides, a guide pile is squeezed at interval of 2 ~ 4m, and enclosed between guide pile and beam type support pile
Nose girder, and the set location of nose girder is lower 30 ~ 50cm than beam type support pile stake top, spacing is that beam type support pile is cut between two side launching noses
Face highly adds 2 ~ 5cm；
D, the installation of beam type support pile
Also a diameter of 5cm hole is being cut open at the top of beam type support pile at following 10cm first, by the shackle below messenger wire during lifting
Vertical lifting is realized through hole, while is rocked when rope in beam type support pile lower bundle prevents lifting；
Beam type support pile is lifted to piling region, driven piles using hammering method, vibratory drilling method or static pressure method, wherein the first pile
On the basis of stake, must ensure that position is correct and without inclination during piling, every beam type support pile by clamp limits it after installing
Mobile or rotation；
E, H profile steel is constructed
The insertion of H profile steel is carried out after beam type supporting pile driving construction terminates, H profile steel surface smoothness is ensured before insertion, using vibration
Hammer subsidence process into shape and carry out insertion operation, the perpendicularity of H profile steel insertion is ensured using positioning guiding rack during insertion and is close to beam type branch
Fender pile, H profile steel insertion controls shaped steel top mark high with suspension element afterwards in place, and the shaped steel with being plugged firmly is connected；
F, bracing members and steel purlin set up installation
The erection of bracing members and steel purlin frame is carried out after the completion of beam type support pile and the heavy facility work of H profile steel, is specially：
Shelf bracket is installed：Shelf bracket uses 80 × 8 angle steel processing and fabricatings, and wide, high is 400mm, scene and H profile steel pile body
Welding, the same bracing members of spacing are laid, in the outer rim of bracket, 100 × 10 angle steel weld elongated arrangement with support together, by each support
Connect it is integral, it is strict to control shelf bracket absolute altitude on sustained height;
The installation of steel purlin：Crane hangs in the steel purlin standard knot that ground on the scene is pre-machined in the foundation ditch excavated,
And steel purlin section is set up onto shelf bracket using bottle gouard moved by hands and hand fit in foundation ditch, steel purlin internode, steel purlin
Between piling bar, between steel purlin and shelf bracket using being welded to connect；
Bracing members are set up：Before bracing members are installed, first bracing members are hung in foundation ditch by crane, when installing bracing members, with manual calabash
Reed slings bracing members, and support termination is ridden upon on triangular support base, live by bracing members both ends and steel purlin firm welding.
G, pull out
After main structure construction finishes and reaches intensity, first bracing members and steel purlin are removed, uses and divides when specifically removing
Section cutting is carried out, and is treated to backfill foundation ditch after the completion of bracing members and the dismounting of steel purlin, is then pulled out using vibration pile pulling mode
Beam type support pile, beam type support pile is closely knit by the space backfill between enclosure wall and agent structure exterior wall after pulling out, then to H types
Steel is pulled out.
The step of pulling out of beam type support pile is in the step g, first clamps beam type support pile head vibration with pile-driving and-pulling machine
1min~2min, make the soil loosening around beam type support pile, produce " liquefaction ", reduce frictional resistance of the soil to stake, then slowly
Up extricate oneself from a predicament and brace oneself up to action, the load condition of a machine is paid attention to during pile pulling, when pulling out difficulty in discovery or pull out to come up, pile pulling should be stopped, can be leading
Down injection is a little, then up dials, and so repeatedly can pull out stake.
Disclosed construction method, combination beam type support pile foundation ditch branch is formed using beam type support pile and H profile steel
Protection structure, in outside, H profile steel is placed on the inside of beam type support pile beam type support pile, beam type support pile of first constructing, H profile steel of constructing afterwards,
After side wall backfill is completed in construction, beam type support pile and H profile steel can be pulled out, and recycle, pull out and typically first pull out H profile steel, so
After pull out beam type support pile.Setting and pulling out for beam type support pile and H profile steel, is hammered into shape using vibrating hydraulic.
The characteristics of combining structure：Beam type support pile can be with earth-retaining, sealing；H profile steel rigidity is big, combining structure integral rigidity
Greatly, H profile steel and beam type support pile can flexibly set length according to engineering and geology characteristic, i.e. beam type supporting pile length is set
Meet seepage stability（Water-stop curtain depth), monolithic stability, topple, swell checking computations needs；And H profile steel length needs, meet branch
The advantages of protection structure intensity and deformation need, and combining structure can give full play to beam type support pile, H profile steel, the rigidity of structure is big, simultaneous
There is an earth-retaining water stopping function, quick construction, simple, system easy to control the quality are reusable edible, cost-effective.
Beneficial effect：A kind of construction method of disclosed combined beam type supporting pile pit supporting construction, tool
Have the advantages that：
Quick construction, short time limit, beam type supporting pile driving construction is extremely quick, the average construction about 7-10 minutes per pile, and has set
Intensity can be formed without maintenance after finishing, if coordinating bracing members in hole to use, can further shorten the construction period again；
Construction technology, machinery are simple, and the construction of beam type support pile can use hydraulic vibration driver, static-pressure pile planting function mechanical execution,
Construction technology is simple, and construction machinery is more single.
Green, saving construction cost, beam type support pile H profile steel can pull out recycling after constructing, avoid propping up
Protection structure turns into underground obstacle, meets " energy-conserving and environment-protective " theory that country advocates, while construction costs can be greatly reduced.
Embodiment
With reference to specific embodiment, the invention will be further described：
A kind of construction method of combined beam type supporting pile pit supporting construction, specifically comprises the following steps：
A, beam type support pile examines lubrication：
After beam type support pile transports to building site, the debris in fore shaft is cleared up, then the overall lock for checking beam type support pile
Mouth and pile body, are repaired to rejected region；
Qualified beam type support pile surface is examined uniformly to smear miscella, miscella presses body by butter, dry bentonite and dry saw foam
Product ratio 5:5:3 are mixed；
B, the lifting of beam type support pile is stacked
It will check that the beam type support pile handled well carries out being hoisted to region to be onstructed using or 3 points of forms of hanging early stage at 2 points, stack
When select flat and firm place to be layered to stack, specific lime light is：
1. order, position, direction and horizontal layout etc. for stacking should be taken into account later easy for construction；
2. beam type support pile will be stacked respectively by model, specification, length, and label explanation is set at stacking；
3. when beam type support pile is being carried, puts down and stacked, it not make it by impulsive force or drop；
4. especially it is careful for longer beam type support pile, because they are more flexurally compliant and are damaged；
5. according to beam type supporting pile installation and length using 2 points of liftings or 3 points of liftings.The spacing of suspending steel wire rope is determined, is made
It is as small as possible to obtain beam type support pile caused amount of deflection under Gravitative Loads, if 2 points of liftings, then two Heave Heres are located at away from beam
The long place in 1/4, formula support pile both ends, so can be preferably minimized the moment of flexure as caused by deadweight；
6. beam type support pile should be layered stacking, stack quantity for every layer and be usually no more than 5, each interlayer wants bolster wooden, chock spacing
Generally 3-4 rice, and upper and lower layer chock should be on same vertical line, the total height of stacking is no more than 2 meters；
7. when beam type support pile, which needs to stack, to be placed, every two interlayer should insert sleeper, and stack total height no more than 2m；
8. for linear pattern beam type support pile, 3m is not to be exceeded in the spacing that sleeper is set；To other kinds of beam type support pile,
4m is not to be exceeded in the spacing that sleeper is set；
9. steel wire rope colligation for convenience, the spacing of adjacent beam type support pile heap should be between 20cm~50cm；
10. storage place should be selected in the place that physical features is flat, free from worry, in favor of operation, and storage ground is needed under the hard nothing of soil property
Fall into, draining is good；
C, the installation of leading truck
Piling location axis is set：Orientation axis is being set to be offset when preventing piling wait area of driving piles, because backfilling of earthwork produces
Raw soil pressure can cause oblique, 5 ~ 10cm of piling location axial direction landwards side skew, in piling location axis before beam type support pile
After it is determined that, piling beginning and end is set, and sets point of observation on axis extended line；
Parallel to orientation axis both sides, a guide pile is squeezed at interval of 2 ~ 4m, and enclosed between guide pile and beam type support pile
Nose girder, and the set location of nose girder is lower 30 ~ 50cm than beam type support pile stake top, spacing is that beam type support pile is cut between two side launching noses
Face highly adds 2 ~ 5cm；
D, the installation of beam type support pile
Also a diameter of 5cm hole is being cut open at the top of beam type support pile at following 10cm first, by the shackle below messenger wire during lifting
Vertical lifting is realized through hole, while is rocked when rope in beam type support pile lower bundle prevents lifting；
Beam type support pile is lifted to piling region, driven piles using hammering method, vibratory drilling method or static pressure method, wherein the first pile
On the basis of stake, must ensure that position is correct and without inclination during piling, every beam type support pile by clamp limits it after installing
Mobile or rotation；
Beam type supporting pile driving construction will correctly select pile-driving method, piling machinery and the division of flowing water section, to make the sheet pile after setting
Wall has enough rigidity and good waterproof action, and sheet pile metope is straight, to meet the requirement of foundation construction, to closed plate
Piling wall also requires that closing is closed up, and according to construction condition, can use and individually squeeze into method, this method is that block-by-block is inserted since one jiao
Beat, every piece of beam type support pile is got to end midway from and do not stopped.Therefore, stake machine track route is short, easy construction, sets speed
It hurry up.But because monolithic is squeezed into, easily banking, cumulative errors are not easy to correct, and metope glacing flatness is difficult to control；
The axis of beam type support pile is first made before piling by survey crew, direction peg can be set at a certain distance, direction peg is straight
Connect and use beam type support pile, then lanyard line is as wire, using the axis of polygon control survey beam type support pile during piling, in axial direction
In the case that normal direction requirement is done, using leading truck；
The gradient of every piece of stake of measurement monitoring at any time is no more than 1/300 during inserting piling, when deflection is excessive can not be with pulling together method
During levelling, pull up and beat again；
E, H profile steel is constructed
The insertion of H profile steel is carried out after beam type supporting pile driving construction terminates, H profile steel surface smoothness is ensured before insertion, using vibration
Hammer subsidence process into shape and carry out insertion operation, the perpendicularity of H profile steel insertion is ensured using positioning guiding rack during insertion and is close to beam type branch
Fender pile, H profile steel insertion controls shaped steel top mark high with suspension element afterwards in place, and the shaped steel with being plugged firmly is connected；
F, bracing members and steel purlin set up installation
The erection of bracing members and steel purlin frame is carried out after the completion of beam type support pile and the heavy facility work of H profile steel, is specially：
Shelf bracket is installed：Shelf bracket uses 80 × 8 angle steel processing and fabricatings, and wide, high is 400mm, scene and H profile steel pile body
Welding, the same bracing members of spacing are laid, in the outer rim of bracket, 100 × 10 angle steel weld elongated arrangement with support together, by each support
Connect it is integral, it is strict to control shelf bracket absolute altitude on sustained height;
The installation of steel purlin：Crane hangs in the steel purlin standard knot that ground on the scene is pre-machined in the foundation ditch excavated,
And steel purlin section is set up onto shelf bracket using bottle gouard moved by hands and hand fit in foundation ditch, steel purlin internode, steel purlin
Between piling bar, between steel purlin and shelf bracket using being welded to connect；
Bracing members are set up：Before bracing members are installed, first bracing members are hung in foundation ditch by crane, when installing bracing members, with manual calabash
Reed slings bracing members, and support termination is ridden upon on triangular support base, live by bracing members both ends and steel purlin firm welding.
G, pull out
Bracing members are removed：Main structure construction finishes and removes bracing members and steel purlin after reaching design strength, removes sectional
Cutting is carried out, and bracing members are removed and should removed with main structure construction process staged and layered, are needed pre-demolition steel branch in demolishing process
Support is held with truck crane, and support is hung out into foundation ditch after cutting；
After foundation ditch backfill, beam type support pile is pulled out, to reuse.When using pile extracting method is vibrated, beam type supporting is pulled out
Before stake, pile extracting method order and pile pulling time should be carefully studied, otherwise, due to the vibration effect of pile pulling, and pile pulling band soil mistake
Surface subsidence and displacement can be caused more, the underground structure of oneself construction can be given to bring harm, and influence close on inhering architecture, construct
The safety of thing or beneath pipeline.It is particularly significant to try reduction pile pulling band soil, main use is poured water, fills sand measure, specific mistake at present
Cheng Wei：Beam type support pile head vibration 1min~2min first is clamped with pile-driving and-pulling machine, makes the soil loosening around beam type support pile, production
Raw " liquefaction ", the native frictional resistance to stake is reduced, then up extricating oneself from a predicament and brace oneself up to action slowly.The load condition of a machine is paid attention to during pile pulling, is found
On when pulling out difficulty or pulling out to come up, pile pulling should be stopped, can down injection is a little in advance, then up dial, stake can so be pulled out repeatedly
Out.
Space between enclosure wall and agent structure outer wall of basement must backfill closely knit before H profile steel is pulled out.Removing branch
Support and during waist frame should the removing such as the waist rail for remaining in shaped steel surface is spacing or support member in shear memory, electric welding scar it is clean.
Item is should be noted that during pile pulling：
1）Pile pulling starting point and order：To closed beam type supporting piling wall, pile pulling starting point should leave angle stake 5 and more than.Can basis
Situation during pile sinking determines pile pulling starting point, the method that can be also pulled out if necessary with jump.It is opposite when the order of pile pulling is preferably with piling.
2）Rapping is with extricating oneself from a predicament and brace oneself up to action：During pile pulling, first sheet pile fore shaft can be shaken with vibration hammer living to reduce the adhesion of soil, then side shakes
While pull out.Stake can first be shaken lower 100-300mm by the more difficult sheet pile pulled out with diesel hammer, then replace rapping with vibration hammer, extricate oneself from a predicament and brace oneself up to action.
3）The beam type support pile larger to pulling resistance, the method for pulling out of intermittent control shaking should be used, vibrates 15min every time,
Vibration hammer is continuously no more than 1.5h.
For occurring pile sinking difficult process during piling：
1 water jetting at high pressure piling technique
When meeting sand, sand gravel or other hard soil layers, hammering method and vibratory drilling method can not pile sinking when, auxiliary jetting can be used
Method, which sinks beam type support pile, to be set to specified absolute altitude.
2 high-pressure water knife auxiliary pile sinking technologies
Construction of prefabricated piles is difficult in gumbo layer or sand gravel layer, and larger to injection equipment, prefabricated pile damage, using height
Water knife auxiliary pile sinking technology is pressed, " water knife " is made up of giant and pile top.The pile top material therefor of " water knife " be I-steel or
Beam type support pile, then arrange 2 giants in prefabricated pile both sides；During injection prefabricated pile, while by giant jetting,
Down vibrated while clamping combining structure with vibration hammer." the water knife " of giant staking point composition, can give full play to high pressure
The advantages of hydraulic giant, can effective reducing friction resistance, while the advantages of play pile top, penetration power is strong, so as to solve in heavily fortified point
Construction of prefabricated piles is difficult in hard viscosity layer or sand gravel layer, and damages the problems such as larger to injection equipment, prefabricated pile.
3 preexisting hole pile sinking technologies
According to prefabricated pile stake is long, stake footpath is using drawing hole power traction hole, then follow-up static pressure and vibrating hydraulic prefabricated pile before piling.Because
Before construction of Static Pressure Pile, draw hole machine, type rig, tri-axes deep mixing stake machine, twin shaft and stir machine etc. deeply) according to stake position whole stake holes
Soil take out, form a relative hole, in construction of Static Pressure Pile stake the friction and Extrusion power of soil is greatly reduced, can be with
The stake for reaching design requirement is long.
The technology contents and technical characteristic of the present invention have revealed that as above, but those skilled in the art still may base
Make a variety of replacements and modification without departing substantially from spirit of the present invention in the announcement of the present invention, therefore, the scope of the present invention should be unlimited
In the content disclosed in embodiment, and various replacements and modification without departing substantially from the present invention should be included, and be present patent application right
It is required that covered.
Claims (2)
1. a kind of construction method of combined beam type supporting pile pit supporting construction, it is characterised in that specifically comprise the following steps：
A, beam type support pile examines lubrication：
After beam type support pile transports to building site, the debris in fore shaft is cleared up, then the overall lock for checking beam type support pile
Mouth and pile body, are repaired to rejected region；
Qualified beam type support pile surface is examined uniformly to smear miscella, miscella presses body by butter, dry bentonite and dry saw foam
Product ratio 5:5:3 are mixed；
B, the lifting of beam type support pile is stacked
It will check that the beam type support pile handled well carries out being hoisted to region to be onstructed using or 3 points of forms of hanging early stage at 2 points, stack
When select flat and firm place to be layered to stack, stack quantity for every layer and be no more than 5, each interlayer want bolster wood, sleeper spacing
Generally 3-4 rice, and upper and lower layer sleeper should be on same vertical line, the total height of stacking is no more than 2 meters；
C, the installation of leading truck
Piling location axis is set：Orientation axis is being set to be offset when preventing piling wait area of driving piles, because backfilling of earthwork produces
Raw soil pressure can cause oblique, 5 ~ 10cm of piling location axial direction landwards side skew, in piling location axis before beam type support pile
After it is determined that, piling beginning and end is set, and sets point of observation on axis extended line；
Parallel to orientation axis both sides, a guide pile is squeezed at interval of 2 ~ 4m, and enclosed between guide pile and beam type support pile
Nose girder, and the set location of nose girder is lower 30 ~ 50cm than beam type support pile stake top, spacing is that beam type support pile is cut between two side launching noses
Face highly adds 2 ~ 5cm；
D, the installation of beam type support pile
Also a diameter of 5cm hole is being cut open at the top of beam type support pile at following 10cm first, by the shackle below messenger wire during lifting
Vertical lifting is realized through hole, while is rocked when rope in beam type support pile lower bundle prevents lifting；
Beam type support pile is lifted to piling region, driven piles using hammering method, vibratory drilling method or static pressure method, wherein the first pile
On the basis of stake, must ensure that position is correct and without inclination during piling, every beam type support pile by clamp limits it after installing
Mobile or rotation；
E, H profile steel is constructed
The insertion of H profile steel is carried out after beam type supporting pile driving construction terminates, H profile steel surface smoothness is ensured before insertion, using vibration
Hammer subsidence process into shape and carry out insertion operation, the perpendicularity of H profile steel insertion is ensured using positioning guiding rack during insertion and is close to beam type branch
Fender pile, H profile steel insertion controls shaped steel top mark high with suspension element afterwards in place, and the shaped steel with being plugged firmly is connected；
F, bracing members and steel purlin set up installation
The erection of bracing members and steel purlin frame is carried out after the completion of beam type support pile and the heavy facility work of H profile steel, is specially：
Shelf bracket is installed：Shelf bracket uses 80 × 8 angle steel processing and fabricatings, and wide, high is 400mm, scene and H profile steel pile body
Welding, the same bracing members of spacing are laid, in the outer rim of bracket, 100 × 10 angle steel weld elongated arrangement with support together, by each support
Connect it is integral, it is strict to control shelf bracket absolute altitude on sustained height；
The installation of steel purlin：Crane hangs in the steel purlin standard knot that ground on the scene is pre-machined in the foundation ditch excavated,
And steel purlin section is set up onto shelf bracket using bottle gouard moved by hands and hand fit in foundation ditch, steel purlin internode, steel purlin
Between piling bar, between steel purlin and shelf bracket using being welded to connect；
Bracing members are set up：Before bracing members are installed, first bracing members are hung in foundation ditch by crane, when installing bracing members, with manual calabash
Reed slings bracing members, and support termination is ridden upon on triangular support base, live by bracing members both ends and steel purlin firm welding；
G, pull out
After main structure construction finishes and reaches intensity, first bracing members and steel purlin are removed, uses and divides when specifically removing
Section cutting is carried out, and is treated to backfill foundation ditch after the completion of bracing members and the dismounting of steel purlin, is then pulled out using vibration pile pulling mode
Beam type support pile, beam type support pile is closely knit by the space backfill between enclosure wall and agent structure exterior wall after pulling out, then to H types
Steel is pulled out.
2. a kind of construction method of combined beam type supporting pile pit supporting construction according to claim 1, its feature exist
In：The step of pulling out of beam type support pile is in the step g, first with pile-driving and-pulling machine clamp beam type support pile head vibration 1min~
2min, make the soil loosening around beam type support pile, produce " liquefaction ", reduce the native frictional resistance to stake, then up shaking slowly
Pull out, the load condition of a machine is paid attention to during pile pulling, when pulling out difficulty in discovery or pull out to come up, pile pulling should be stopped, can down being applied in advance
Beat a little, then up dial, stake can so be pulled out repeatedly.
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| CN111236253A (en) * | 2020-02-11 | 2020-06-05 | 中铁隧道集团二处有限公司 | Construction process for installing steel purlin and steel support on water |
| CN112177015A (en) * | 2020-10-14 | 2021-01-05 | 河北建设集团股份有限公司 | Steel sheet pile foundation pit supporting construction method in sandy soil layer environment |
| CN115506364A (en) * | 2022-09-21 | 2022-12-23 | 中铁建工集团有限公司 | Construction method of foundation pit supporting structure |
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| CN115506364B (en) * | 2022-09-21 | 2024-04-30 | 中铁建工集团有限公司 | Construction method of foundation pit supporting structure |
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