CN107178085A - A kind of prefabricated pitching pile anchor pole monoblock type foundation pit enclosure structure construction method - Google Patents
A kind of prefabricated pitching pile anchor pole monoblock type foundation pit enclosure structure construction method Download PDFInfo
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- CN107178085A CN107178085A CN201710531879.6A CN201710531879A CN107178085A CN 107178085 A CN107178085 A CN 107178085A CN 201710531879 A CN201710531879 A CN 201710531879A CN 107178085 A CN107178085 A CN 107178085A
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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
Abstract
The invention discloses a kind of prefabricated pitching pile anchor pole monoblock type foundation pit enclosure structure construction method, it is characterised in that：By step (1) levelling of the land, (2) construction Guan Liang and pipe casing, (3) first stage soil layer are excavated, (4) first stage prefabricated pile is in place, pitching pile, (5) are constructed first encloses purlin and pipe casing, (6) install press strip with holes, (7) anchor bolt construction, (8) and spray first concrete topping, (9) second stage preformed pile connecting, pitching pile, (10) repeat step (5) step (10), until completing the construction of building enclosure.It the advantage is that：The present invention forms overall foundation pit enclosure structure using structure pile and anchor pole, Guan Liang and enclose in purlin structure be provided with pipe casing, according to cutting depth " segmentation pile extension; segmentation pitching pile; anchor pole segmentation is gone along with sb. to guard him ", Underground Construction is finished, Guan Liang, enclose purlin, pipe casing, prefabricated pile etc. can partly or entirely recycling, with certain economic benefit.
Description
Technical field
The invention belongs to technical field of civil engineering, and in particular to a kind of prefabricated pitching pile-anchor pole monoblock type foundation pit enclosure knot
Structure construction method.
Background technology
In deep basal pit and other underground engineering constructions, deep foundation pit support problem is commonly encountered, its excavation difficulty is big, the duration
It is long, costly, the 10%-20% of basic civil engineering total cost is typically constituted from, the cost of big deep-foundation pit engineering turns into up to 30%-40%
A critically important research topic in urban construction.Type selecting for building enclosure causes Construction of Deep Excavation Engineering cost high
How one of key factor, can be on the premise of deep basal pit safe construction be ensured, farthest saving construction cost is
We need the important directions of research, to the recyclable recycling of all or part of building enclosure, from new technical measures and work
Skill novel aspects break through has certain realistic meaning to reduction Construction of Deep Excavation Engineering cost.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to which existing provide a kind of recyclable, the prefabricated of easy construction is inserted
Stake-anchor pole monoblock type foundation pit enclosure structure construction method.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of prefabricated pitching pile-anchor pole monoblock type foundation ditch
Construction method of enclosure structure, its innovative point is：By step (1) levelling of the land, (2) construction Guan Liang and pipe casing, (3) first
Stage soil layer, which is excavated, (4) first stage prefabricated pile is in place, pitching pile, (5) are constructed first encloses purlin and pipe casing, (6) install with holes
Press strip, (7) anchor bolt construction, (8) are sprayed first concrete topping, (9) second stage preformed pile connecting, pitching pile, (10) and repeated
Step (5)-step (8), until the construction of building enclosure is completed, it is described to comprise the following steps that：
（1）Levelling of the land：It is some of axis vertical take-off by field division according to the measurement control point of construction area and physical relief
Plot, first by the way of mechanically or manually, at the absolute altitude that site elevation is smoothed to the Guan Liang of arrangement and method for construction determination, or it is smooth
Dug to the high above 300mm of Guan Liang top mark, then by the way of hand excavation to Guan Liangdibiaogaochu, form Guan Liang groove, it is described
Guan Liang ditch groove width than design the roomy 150-200mm of Guan Liang, to reserve appropriate installment work face；
（2）Guan Liang of constructing and pipe casing：First, wearing on the floor with holes of steel pipe casing a left and right ends is passed through using anchor pole a
Anchor hole hole, and squeeze into soil layer and to fix steel pipe casing a；Then, with step（1）The Guan Liang groove that construction is completed is used as Guan Liang
Interior side form and bed die, outer side mold use combined steel formwork or plywood form, Guan Liang steel reinforcement cage is hung, concreting is finished
Afterwards, maintenance in time, removes outer side mold, and the steel pipe casing a both sides should be respectively welded 8-15 root steel tie a and be carried out with Guan Liang
Drawknot, is segmented drawknot, is segmented casting concrete, until whole constructions of Guan Liang are completed, meanwhile, Guan Liang and pile protection pipe construction are finished
Afterwards, by the use of base soil as support, first of cross-brace of construction can be carried out according to design requirement；
（3）First stage soil layer is excavated：The actual distribution situation of soil layer in foundation ditch is determined, suitable excavation is determined in advance in each soil layer
Scheme, principle is excavated according to layer and section, and every layer of cutting depth is 400mm-500mm；
（4）First stage prefabricated pile is in place, pitching pile：While soil layer is excavated, with step（2）The stake in Guan Liang that middle construction is completed
On the basis of sleeve pipe a, by first stage prefabricated pile alignment procedures by the way of static press piling（2）The pipe casing a that construction is completed enters
Row pitching pile, the bottom absolute altitude of first stage prefabricated pile is always maintained at the position less than below excavation face 1m in soil layer digging process；
（5）Install first and enclose purlin and pipe casing：Enclose the preparation and step before purlin construction（2）Guan Liang construction is identical, first adopts
Anchor hole hole is worn through on the floor with holes of steel pipe casing b left and right ends with anchor pole b, and is squeezed into steel pipe casing in soil layer
B is fixed, and is excavated out and enclosed purlin groove, and 8-15 root steel tie b and reinforced concrete fortifield village should be respectively welded in the pipe casing b both sides
Purlin carries out drawknot, is segmented drawknot, is segmented casting concrete, until complete to enclose the installation of purlin, meanwhile, enclose purlin and pipe casing is applied
After work is finished, by the use of base soil as support, construction second cross-brace can be carried out according to design requirement；
（6）Press strip with holes is installed：Press strip with holes is made of steel plate, according to the position of follow-up anchor bolt construction, spacing, using machinery
The mode of drilling is stayed on steel plate sets out anchor pole location hole, and the press strip with holes is connected by screw bolts in step（4）Construction is completed
Prefabricated pile on；
（7）Anchor bolt construction：Anchor pole hole position, aperture, length, the gradient determined according to design is drilled, drilling to completion
Afterwards, using pressure wind flushing hole, step is passed through（6）In anchor pole location hole insertion anchor pole c on press strip with holes and Grouting Pipe, carry out
Slip casting, maintenance, tensioning and sealing off and covering anchorage work；
（8）Spray first of concrete topping：Gunite concrete cement is portland cement, Portland cement or slag silicon
Acid salt cement, coarse aggregate is the mixture of rubble, cobble or both, and the coarse aggregate cobble-stone diameter is 5-10mm, and fine aggregate is
Medium-fine sand, the fine aggregate cobble-stone diameter is 2-3mm；
（9）Second segment preformed pile connecting, pitching pile：By second segment prefabricated pile and step（4）The first stage prefabricated pile that construction is completed
Through row pile extension, carried out after preformed pile connecting before pitching pile again, need to first loosen step（6）The press strip with holes that construction is completed, it is ensured that pre-
Stake processed can continue pitching pile, pile sinking, and preformed pile connecting is using being welded to connect, and throat depth is less than the maximum between prefabricated pile and pipe casing
In space, work progress, the bolt connection quantity of press strip and prefabricated pile with holes can be controlled first in 30-40% of sum or so, treat complete
After portion's soil layer excavation is finished, all bolt connections work are completed in time；
（10）Repeat above step（5）- step（8）, until completing the construction of building enclosure.
Further, the step（2）And step（5）In Guan Liang and enclose purlin and pour armored concrete or pre-manufactured steel for scene
Reinforced concrete, Guan Liang and encloses purlin and is connected with pipe casing by cast in situs or grout sleeve connection, Guan Liang and encloses purlin sectional dimension
Highly highly equal with pipe casing not less than 500mm × 500mm, pipe casing is hollow steel pipe, and wall thickness is not less than 20mm, shape
For rectangle or circle.
Further, the step（2）Or（5）Middle steel tie length is 800-1000mm, the steel tie diameter
For 12-20mm, the steel tie should be with Guan Liang or enclosing reinforcement welding inside purlin and be connected, and the rate that is welded to connect is steel tie
The 70%-100% of sum.
Further, the step（4）With（9）Middle prefabricated pile is steel-pipe pile, and wall thickness is 16-20mm, section minimum dimension
For 500mm, each side size of prefabricated pile is than the small 8-10mm of pipe casing inner section size.
Further, the step（6）In press strip with holes be steel plate materialses, the thickness of press strip with holes is 12mm, a width of
Hole on 100mm, press strip with holes is than the design big 2mm of anchor pole sectional dimension.
Beneficial effects of the present invention are as follows：
（1）The present invention forms overall foundation pit enclosure structure using structure pile and anchor pole, is equipped with Guan Liang and enclosing in purlin structure
Pipe casing, according to cutting depth " segmentation pile extension, is segmented pitching pile, and anchor pole segmentation is gone along with sb. to guard him ", Underground Construction is finished, and is suitable for many
The foundation ditch of depth is planted, it is applied widely；
（2）Guan Liang of the present invention is cast-in-situ steel reinforced concrete or prefabricated reinforced concrete with purlin is enclosed, and materials are extensive, easy construction, valency
Lattice are cheap, and high and reinforcing bar the cooperation effect of intensity is good；
（3）Guan Liang of the present invention, enclose purlin, pipe casing, prefabricated pile etc. can partly or entirely recycling, reduce engineering into
This, with certain economic results in society.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Embodiment 1
A kind of prefabricated pitching pile-anchor pole monoblock type foundation pit enclosure structure construction method, is comprised the following steps that：
（1）Levelling of the land：It is some of axis vertical take-off by field division according to the measurement control point of construction area and physical relief
Plot.From the grid at intervals of 20 meters, and with the ground elevation in each crosspoint of grid, it is used as calculating quantities and tissue
The foundation of construction.First by the way of mechanically or manually, required according to arrangement and method for construction, it is smooth to the soil layer progress in place, and
Appropriate digs out unnecessary soil layer, at the absolute altitude that site elevation is smoothed to the Guan Liang of arrangement and method for construction determination, then use is manually opened
The mode of digging is dug to Guan Liangdibiaogaochu, forms Guan Liang groove, and Guan Liang ditch groove width should be than the design roomy 150mm of Guan Liang, to stay
Go out appropriate installment work face；
（2）Guan Liang of constructing and pipe casing：Guan Liang is cast-in-situ steel reinforced concrete Guan Liang, and sectional dimension is 500mm × 500mm, pile protection
Manage as rectangle hollow steel pipe, its wall thickness is 20mm, equal highly with the depth of section of Guan Liang.First, pile protection is passed through using anchor pole a
Anchor hole hole is worn on the floor with holes of pipe a left and right ends, and is squeezed into soil layer and to be fixed steel pipe casing；Then, with step（1）
Construct the interior side form and bed die of the Guan Liang groove that completes as Guan Liang, outer side mold uses combined steel formwork, Guan Liang steel reinforcement cage hangs,
After concreting is finished, maintenance in time removes outer side mold, it is ensured that the complete and smooth of Guan Liang lateral surface, in order to which the later stage is horizontal
The installation accuracy of support, pipe casing a is connected with Guan Liang by cast in situs, and 8 steel ties are respectively welded in pipe casing a both sides
A carries out drawknot, a diameter of 12mm of steel tie a with Guan Liang, and length is 800mm, and steel tie a and Guan Liang inside steel bar welding are in succession
Connect, it is the 70% of steel tie a sums to be welded to connect rate, is segmented drawknot, is segmented casting concrete, until completing the installation of Guan Liang
Construction；Meanwhile, after Guan Liang and pile protection pipe construction are finished, by the use of base soil as support, it can carry out constructing first according to design requirement
Road cross-brace；
（3）First stage soil layer is excavated：Seek advice from what unit was provided according to geotechnical engineering investigation《Geotechnical engineering investigation is reported》, it is determined that
Suitable excavation plan is determined in advance in the actual distribution situation of soil layer in foundation ditch, each soil layer.Principle is excavated according to layer and section, often
Layer cutting depth control is 400mm, carries out foundation ditch protected working in every layer of digging process, forbids to backbreak, carry out drainer
Make, while excavation of foundation pit should be combined with prefabricated pile pitching pile technique, it is ensured that the security of excavation face；
（4）First stage prefabricated pile is in place, pitching pile：Prefabricated pile is steel-pipe pile, and its thickness is 16mm, and cross section minimum dimension is
500mm, each side size of prefabricated pile compares step（2）Construct the small 8mm of pipe casing a inner section sizes completed.Step（3）Soil layer is excavated
While, prefabricated pile is that Liftable is in place, and lifting machine slings pile body, with step（2）The pipe casing constructed in the Guan Liang completed
On the basis of, by prefabricated pile alignment procedures（2）The pipe casing a that construction is completed carries out pitching pile, and pitching pile process must not strongly extrude pile protection
Pipe, strict control pile body perpendicularity.Soil layer digging process, prefabricated pile carries out pitching pile, pile sinking by the way of static press piling immediately,
And ensure that the bottom absolute altitude of prefabricated pile is always maintained at the position less than below excavation face 1m in soil layer digging process；
（5）Construct first and enclose purlin and pipe casing：Enclose purlin and enclose purlin for cast-in-situ steel reinforced concrete, sectional dimension be 500mm ×
500mm, its wall thickness is 20mm, and the depth of section for enclosing purlin is highly equal with pile protection b pipes.Enclose the preparation and step before purlin construction
（2）Middle Guan Liang is identical, first wears anchor hole hole through on the floor with holes of pipe casing b left and right ends with anchor pole b, and squeeze into soil layer
Steel pipe casing b is fixed, and excavates out and encloses purlin groove, pipe casing b is connected with enclosing purlin cast in situs, and pipe casing b both sides should be divided
8 steel ties and purlin Han Jie not be enclosed carry out drawknot, a diameter of 12mm of steel tie, length is 800mm, steel tie and enclose purlin
Internal reinforcement welding connection, it is the 70% of steel tie sum to be welded to connect rate, is segmented drawknot, is segmented casting concrete, until complete
The installation of purlin is enclosed into cast-in-situ steel reinforced concrete.Entirety encloses pipe casing b positions and step in purlin structure（2）What construction was completed
Pipe casing a positions in Guan Liang structure are corresponding, strict tolerances scope, it is ensured that the accuracy of follow-up prefabricated pile pitching pile and spirit
Activity.Meanwhile, enclose purlin and after pile protection pipe construction finishes, by the use of base soil as support, can carry out constructing second according to design requirement
Road cross-brace；
（6）Press strip with holes is installed：Press strip with holes is made of steel plate, and press strip thickness with holes is 12mm, a width of 100mm, according to rear
The position of continuous anchor bolt construction, spacing, are stayed on steel plate by the way of machine drilling and set out anchor pole location hole, on press strip with holes
Hole should be than the design big 2mm of anchor pole sectional dimension, and during in-site installation press strip with holes, press strip with holes is connected by screw bolts in step
（2）Construct on the prefabricated pile completed, can flexibly pacify and tear open；
（7）Anchor bolt construction：The materials such as reinforcing bar, cement and sand should be got out before anchor bolt construction according to design requirement, reasonable selection is bored
Hole equipment and its corollary equipment, such as drilling machine, the cutting machine of screwing steel bars, electric welding machine, butt welding machine, anchor pole grouting are stirred
Mix machine, mudjack etc..Should be real by the match ratio progress mortar strength of design code by the cement and sand that are used when constructing before perforate
Test and reinforcement welding intensity experiment.Anchor pole hole position, aperture, length, gradient are drilled according to determined by design, are drilled into
After projected depth, using pressure wind flushing hole, pass through step（6）Construct complete press strip with holes on hole position insertion anchor pole c and
Grouting Pipe, carries out slip casting, maintenance, tensioning and sealing off and covering anchorage and works；
（8）Spray first of concrete topping：Gunite concrete is portland cement, and coarse aggregate is hard durable rubble, stone
Seed footpath is 5mm, and fine aggregate is medium-fine sand, and particle diameter is 2mm.When there is freeze proof or seepage resistance demand, strength of cement is not preferably less than
42.5 grades, and when using alkaline accelerator, should must not be used containing active silica using intensity check experiment is preceding done
Building stones；
（9）Second stage preformed pile connecting, pitching pile：By second stage prefabricated pile and step（4）Construction completes prefabricated pile and connect through row
Stake, because the condition of jack technique is limited, preformed pile connecting must using being welded to connect, throat depth no more than prefabricated pile with
Maximum interspace between pipe casing.Due to step（6）The press strip with holes that construction is completed is connected by screw bolts on prefabricated pile, can be flexible
Peace is torn open, works as step（7）Construction is finished, and concrete topping is reached after the intensity of design design requirement, and excavation of foundation pit face has certain
Security, carried out after preformed pile connecting before pitching pile again, need to first loosen step（6）In can be flexible with prefabricated pile by bolt
The press strip with holes removed, it is ensured that prefabricated pile can continue pitching pile, pile sinking.In work progress, the bolt of press strip and prefabricated pile with holes connects
Connecing quantity can first be controlled 30% or so of sum, and after whole soil layers are excavated and finished, all bolt connection work are completed in time.
Design is to answer high in second safeguard procedures to overall building enclosure, work progress using press strip with holes be connected with prefabricated pile
Degree is paid attention to, and can not use inferior materials and turn out substandard goods；
（10）Repeat above step（5）- step（8）, until completing the construction of building enclosure.
Embodiment 2
A kind of prefabricated pitching pile-anchor pole monoblock type foundation pit enclosure structure construction method, is comprised the following steps that：
（1）Levelling of the land：It is some of axis vertical take-off by field division according to the measurement control point of construction area and physical relief
Plot, it is first by the way of mechanically or manually, site elevation is smooth to the high above 300mm of Guan Liang top mark, then using manually opening
The mode of digging is dug to Guan Liangdibiaogaochu, forms Guan Liang groove, Guan Liang ditch groove width than design the roomy 200mm of Guan Liang, to stay
Go out appropriate installment work face；
（2）Guan Liang of constructing and pipe casing：Guan Liang is prefabricated reinforced concrete Guan Liang, and sectional dimension is 550mm × 550mm, pile protection
Manage as circular hollow steel pipe, its wall thickness is 30mm, equal highly with the depth of section of Guan Liang.First, steel is passed through using anchor pole
Anchor hole hole is worn on the floor with holes of pipe casing a left and right ends, and is squeezed into soil layer and to be fixed steel pipe casing a；Then, with step
Suddenly（1）Construct complete Guan Liang groove as prefabricated reinforced concrete Guan Liang mounting groove position, prefabricated reinforced concrete Guan Liang with
Steel pipe casing a is connected by grout sleeve, and steel pipe casing a both sides should be respectively welded 15 steel ties and be mixed with precast reinforced
Solidifying soil Guan Liang carries out sleeve grouting drawknot, a diameter of 20mm of steel tie, and the length of steel tie is 1000mm, steel tie with
Reinforcement welding connection inside purlin is enclosed, it is the 100% of steel tie sum to be welded to connect rate, is segmented drawknot, is segmented casting concrete,
Until completing the installation of reinforced concrete fortifield village purlin；Meanwhile, Guan Liang and pipe casing a are constructed after finishing, and branch is used as by the use of base soil
Support, can carry out first of cross-brace of construction according to design requirement；
（3）First stage soil layer is excavated：The actual distribution situation of soil layer in foundation ditch is determined, suitable excavation is determined in advance in each soil layer
Scheme, principle is excavated according to layer and section, and every layer of cutting depth is 500mm；
（4）First stage prefabricated pile is in place, pitching pile：Prefabricated pile is steel-pipe pile, and wall thickness is 16mm, and section minimum dimension is 600mm,
Each side size of prefabricated pile is than the small 10mm of pipe casing a inner section sizes.While soil layer is excavated, with step（2）Middle construction is completed
Guan Liang on pipe casing a on the basis of, by first stage prefabricated pile alignment procedures by the way of static press piling（2）Construction is completed
Pipe casing a carry out pitching pile, it is ensured that the bottom absolute altitude of prefabricated pile be always maintained in soil layer digging process be less than below excavation face 1m
Position；
（5）Install first and enclose purlin and pipe casing：Enclose purlin and purlin enclosed using prefabricated reinforced concrete, section chi be 500mm ×
500mm, encloses that purlin depth of section is highly equal with pipe casing b, encloses preparation and step before purlin construction（2）Guan Liang construction phase
Together, anchor hole hole is first worn through on the floor with holes of steel pipe casing b left and right ends using anchor pole b, and squeezed into steel in soil layer
Pipe casing b processed is fixed, and excavate out enclose purlin groove as prefabricated reinforced concrete enclose purlin mounting groove position, prefabricated reinforced concrete
Enclose purlin to be connected by grout sleeve with pipe casing b, 15 steel ties and precast reinforced coagulation should be respectively welded in pipe casing b both sides
Fortifield village's purlin progress sleeve grouting drawknot, a diameter of 20mm of steel tie, the length of steel tie is 1000mm.Entirety encloses purlin structure
On pipe casing position should be with step（2）The pipe casing a positions in Guan Liang structure that middle construction is completed are corresponding, and strict control is missed
Poor scope, it is ensured that the accuracy of follow-up prefabricated pile pitching pile and flexibility；Meanwhile, enclose purlin and pipe casing b constructs after finishing, utilize base
Soil can carry out construction second cross-brace as support according to design requirement；
（6）Press strip with holes is installed：Press strip with holes is made of steel plate, and thickness is 12mm, a width of 100mm, the hole on press strip with holes
Hole is than the design big 2mm of anchor pole sectional dimension, according to the position of follow-up anchor bolt construction, spacing, in steel by the way of machine drilling
Stayed on plate and set out anchor pole location hole, the press strip with holes is connected by screw bolts in step（4）Construct on the prefabricated pile completed；
（7）Anchor bolt construction：Anchor pole hole position, aperture, length, the gradient determined according to design is drilled, drilling to completion
Afterwards, using pressure wind flushing hole, step is passed through（6）In anchor pole location hole insertion anchor pole c on press strip with holes and Grouting Pipe, carry out
Slip casting, maintenance, tensioning and sealing off and covering anchorage work；
（8）Spray first of concrete topping：Gunite concrete cement is Portland cement, and coarse aggregate is cobble, thick bone
Material cobble-stone diameter is 10mm, and fine aggregate is medium-fine sand, and fine aggregate cobble-stone diameter is 3mm；
（9）Second segment preformed pile connecting, pitching pile：By second segment prefabricated pile and step（4）The first stage prefabricated pile that construction is completed
Through row pile extension, carried out after preformed pile connecting before pitching pile again, need to first loosen step（6）The press strip with holes that construction is completed, it is ensured that pre-
Stake processed can continue pitching pile, pile sinking, and preformed pile connecting is using being welded to connect, and throat depth is less than the maximum between prefabricated pile and pipe casing
In space, work progress, the bolt connection quantity of press strip and prefabricated pile with holes can first control, 40% or so of sum, to treat whole
After soil layer excavation is finished, all bolt connections work are completed in time；
（10）Repeat above step（5）- step（8）, until completing the construction of building enclosure.
Above-described embodiment is presently preferred embodiments of the present invention, is not the limitation to technical solution of the present invention, as long as
The technical scheme that can be realized without creative work on the basis of above-described embodiment, is regarded as falling into patent of the present invention
Rights protection scope in.
Claims (5)
1. a kind of prefabricated pitching pile-anchor pole monoblock type foundation pit enclosure structure construction method, it is characterised in that：By step (1) place
Smooth, (2) construction Guan Liang and pipe casing, (3) first stage soil layer are excavated, (4) first stage prefabricated pile is in place, pitching pile, (5) are applied
Work encloses purlin for first and pipe casing, (6) install press strip with holes, (7) anchor bolt construction, (8) and spray first concrete topping, (9)
Second stage preformed pile connecting, pitching pile, (10) repeat step (5)-step (8), until completing the construction of building enclosure, the tool
Body step is as follows：
（1）Levelling of the land：It is some of axis vertical take-off by field division according to the measurement control point of construction area and physical relief
Plot, first by the way of mechanically or manually, at the absolute altitude that site elevation is smoothed to the Guan Liang of arrangement and method for construction determination, or it is smooth
Dug to the high above 300mm of Guan Liang top mark, then by the way of hand excavation to Guan Liangdibiaogaochu, form Guan Liang groove, it is described
Guan Liang ditch groove width than design the roomy 150-200mm of Guan Liang, to reserve appropriate installment work face；
（2）Guan Liang of constructing and pipe casing：First, wearing on the floor with holes of steel pipe casing a left and right ends is passed through using anchor pole a
Anchor hole hole, and squeeze into soil layer and to fix steel pipe casing a；Then, with step（1）The Guan Liang groove that construction is completed is used as Guan Liang
Interior side form and bed die, outer side mold use combined steel formwork or plywood form, Guan Liang steel reinforcement cage is hung, concreting is finished
Afterwards, maintenance in time, removes outer side mold, and the steel pipe casing a both sides should be respectively welded 8-15 root steel tie a and be carried out with Guan Liang
Drawknot, is segmented drawknot, is segmented casting concrete, until whole constructions of Guan Liang are completed, meanwhile, Guan Liang and pile protection pipe construction are finished
Afterwards, by the use of base soil as support, first of cross-brace of construction can be carried out according to design requirement；
（3）First stage soil layer is excavated：The actual distribution situation of soil layer in foundation ditch is determined, suitable excavation is determined in advance in each soil layer
Scheme, principle is excavated according to layer and section, and every layer of cutting depth is 400mm-500mm；
（4）First stage prefabricated pile is in place, pitching pile：While soil layer is excavated, with step（2）The stake in Guan Liang that middle construction is completed
On the basis of sleeve pipe a, by first stage prefabricated pile alignment procedures by the way of static press piling（2）The pipe casing a that construction is completed enters
Row pitching pile, the bottom absolute altitude of first stage prefabricated pile is always maintained at the position less than below excavation face 1m in soil layer digging process；
（5）Install first and enclose purlin and pipe casing：Enclose the preparation and step before purlin construction（2）Guan Liang construction is identical, first adopts
Anchor hole hole is worn through on the floor with holes of steel pipe casing b left and right ends with anchor pole b, and is squeezed into steel pipe casing in soil layer
B is fixed, and is excavated out and enclosed purlin groove, and 8-15 root steel tie b and reinforced concrete fortifield village should be respectively welded in the pipe casing b both sides
Purlin carries out drawknot, is segmented drawknot, is segmented casting concrete, until complete to enclose the installation of purlin, meanwhile, enclose purlin and pipe casing is applied
After work is finished, by the use of base soil as support, construction second cross-brace can be carried out according to design requirement；
（6）Press strip with holes is installed：Press strip with holes is made of steel plate, according to the position of follow-up anchor bolt construction, spacing, using machinery
The mode of drilling is stayed on steel plate sets out anchor pole location hole, and the press strip with holes is connected by screw bolts in step（4）Construction is completed
Prefabricated pile on；
（7）Anchor bolt construction：Anchor pole hole position, aperture, length, the gradient determined according to design is drilled, drilling to completion
Afterwards, using pressure wind flushing hole, step is passed through（6）In anchor pole location hole insertion anchor pole c on press strip with holes and Grouting Pipe, carry out
Slip casting, maintenance, tensioning and sealing off and covering anchorage work；
（8）Spray first of concrete topping：Gunite concrete cement is portland cement, Portland cement or slag silicon
Acid salt cement, coarse aggregate is the mixture of rubble, cobble or both, and the coarse aggregate cobble-stone diameter is 5-10mm, and fine aggregate is
Medium-fine sand, the fine aggregate cobble-stone diameter is 2-3mm；
（9）Second segment preformed pile connecting, pitching pile：By second segment prefabricated pile and step（4）The first stage prefabricated pile that construction is completed
Through row pile extension, carried out after preformed pile connecting before pitching pile again, need to first loosen step（6）The press strip with holes that construction is completed, it is ensured that pre-
Stake processed can continue pitching pile, pile sinking, and preformed pile connecting is using being welded to connect, and throat depth is less than the maximum between prefabricated pile and pipe casing
In space, work progress, the bolt connection quantity of press strip and prefabricated pile with holes can be controlled first in 30-40% of sum or so, treat complete
After portion's soil layer excavation is finished, all bolt connections work are completed in time；
（10）Repeat above step（5）- step（8）, until completing the construction of building enclosure.
2. a kind of prefabricated pitching pile according to claim 1-anchor pole monoblock type foundation pit enclosure structure construction method, its feature exists
In：The step（2）And step（5）In Guan Liang and enclose purlin and pour armored concrete or prefabricated reinforced concrete, Guan Liang for scene
With enclose purlin be connected with pipe casing by cast in situs or grout sleeve connection, Guan Liang and enclose purlin sectional dimension not less than 500mm ×
500mm, highly highly equal with pipe casing, pipe casing is hollow steel pipe, and wall thickness is not less than 20mm, is shaped as rectangle or circle.
3. a kind of prefabricated pitching pile according to claim 1 or 2-anchor pole monoblock type foundation pit enclosure structure construction method, it is special
Levy and be：The step（2）Or（5）Middle steel tie length be 800-1000mm, a diameter of 12-20mm of steel tie,
The steel tie should be with Guan Liang or enclosing reinforcement welding inside purlin and be connected, and the rate that is welded to connect is the total 70%- of steel tie
100%。
4. a kind of prefabricated pitching pile according to claim 1-anchor pole monoblock type foundation pit enclosure structure construction method, its feature exists
In：The step（4）With（9）Middle prefabricated pile is steel-pipe pile, and wall thickness is 16-20mm, and section minimum dimension is 500mm, prefabricated pile
Each side size than the small 8-10mm of pipe casing inner section size.
5. a kind of prefabricated pitching pile according to claim 1-anchor pole monoblock type foundation pit enclosure structure construction method, its feature exists
In：The step（6）In press strip with holes be steel plate materialses, the thickness of press strip with holes is 12mm, a width of 100mm, on press strip with holes
Hole than design the big 2mm of anchor pole sectional dimension.
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Cited By (1)
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| CN108086329A (en) * | 2017-11-30 | 2018-05-29 | 中国二十冶集团有限公司 | Instead of the production method of Guan Liang steel bar stress and the punching block of template |
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| KR20130085353A (en) * | 2012-01-19 | 2013-07-29 | 백인우 | Construction method for retaining wall and construction apparatus for thereof and retaining wall structure |
| CN105544559A (en) * | 2016-01-29 | 2016-05-04 | 济南轨道交通集团有限公司 | Structure and method for foundation pit supporting by adopting prefabricated parts |
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| KR20130085353A (en) * | 2012-01-19 | 2013-07-29 | 백인우 | Construction method for retaining wall and construction apparatus for thereof and retaining wall structure |
| CN105544559A (en) * | 2016-01-29 | 2016-05-04 | 济南轨道交通集团有限公司 | Structure and method for foundation pit supporting by adopting prefabricated parts |
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| CN108086329A (en) * | 2017-11-30 | 2018-05-29 | 中国二十冶集团有限公司 | Instead of the production method of Guan Liang steel bar stress and the punching block of template |
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