CN109235453A - Deep basal pit PRC tubular pole assembled method for protecting support - Google Patents
Deep basal pit PRC tubular pole assembled method for protecting support Download PDFInfo
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- CN109235453A CN109235453A CN201811267010.6A CN201811267010A CN109235453A CN 109235453 A CN109235453 A CN 109235453A CN 201811267010 A CN201811267010 A CN 201811267010A CN 109235453 A CN109235453 A CN 109235453A
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- steel
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of deep basal pit PRC tubular pole assembled method for protecting support, which includes the following steps: 1, preparation of construction；2, PRC tubular pole supporting construction；3, lattice column column pile driving construction；4, first channel type steel supporting system construction: the support of first layer H profile steel is mainly made of main support, sub-support, fashioned iron bracket, main support and sub-support weld to form stability triangle frame, it is welded by end fashioned iron bracket and L-type steel plate collar tie beam, forms first road support system；5, second steel supporting system is constructed: bracing members are made of steel pipe, and steel purlin is made of Two bors d's oeuveres fashioned iron, and expansion bolt fixed angles steel corbel bracket is set on the fender post of foundation pit two sides, set up steel purlin.The present invention provides a kind of deep basal pit PRC tubular pole assembled method for protecting support of first road support construction mainly formed using PRC tubular pole support pile and H profile steel, mechanization degree is high, accelerates construction progress, and reduces the foundation pit support construction period, and it is not necessarily to mud off, mud contamination will not be generated.
Description
Technical field
The present invention relates to Deep Foundation Pit Supporting Project fields, and in particular to a kind of deep basal pit PRC tubular pole assembled method for protecting support.
Background technique
Currently, deep pit digging supporting is wherein in the exploitation construction of city high level, super high-rise building and the underground space
One essential important form of construction work.And row of bored piles supporting is since anti-side rigidity is big, bending resistance is strong, deformation
It is relatively small, be conducive to protect surrounding buildings and urban operating mechanism safety, become common piles in deep pits support form.But
The construction limitation that civilized construction environmental requirement is high and the construction period is tight is often faced in Municipal Engineering Construction instantly, and is filled
Due to the phenomenon that easily causing construction site mud to flow over when construction, and long construction period influences municipal building site for note row of piles stake supporting
Whole Image and construction period, therefore the supporting of bored concrete pile campshed is limited and system in existing engineering use by very much
About.
Summary of the invention
It is an object of the invention to overcome in existing row of bored piles support technology to flow over and apply in the presence of live mud
Work period long problem and a kind of deep basal pit PRC tubular pole assembled method for protecting support is provided, the method for protecting support mechanized construction degree
Height accelerates construction progress, and reduces the foundation pit support construction period, and is not necessarily to mud off, will not generate mud contamination.
To achieve the goals above, technical scheme is as follows: a kind of deep basal pit PRC tubular pole assembled supporting side
Method, the method for protecting support include the following steps:
Step 01) preparation of construction: carrying out levelling of the land to construction site, arranges SURVEYING CONTROL NETWORK, accurate true fixed pile, when piling
According to the stake site of releasing that stake machine is in place, pile position deviation is not more than 50mm；
Step 02) PRC tubular pole supporting construction, comprising:
A. drilling machine is in place: long spire favourable turn is in place, makes drilling rod perpendicular alignmnet stake position center, it is ensured that pile verticality deviation is not more than
1%；
B. drilling and forming hole: when drilling starts, closing drill bit valve, when moving down drilling rod to drill bit and contacting to earth, starter motor drilling,
It is fast after first slow, while checking the deviation and timely correction of drilling；
C. plant stake: after pile hole construction, loop wheel machine should be in place immediately, and preparation hangs tubular pole, and tubular pole uses a section tubular pole, and tubular pole is inserted
After entering stake position, it is first inserted into 1.5~2m, then stablize stake vertically, perpendicularity deviation must not exceed 0.5% when stake is inserted into, in steady stake
As found, stake out of plumb answers timely correction in journey, and tubular pole is finally vibrated to designed elevation using vibreatory hammer；
Step 03) lattice column, column pile driving construction；
Step 04) head channel type steel supporting system construction, comprising:
A. earth excavation, spray shield install Two bors d's oeuveres channel steel binder to original ground at lattice column；
B. it welds to form L-type with tubular pole top end plate respectively using rectangular slat steel plate, connects PRC campshed instead of collar tie beam to be formed
It is whole；
C. first layer H profile steel support is mainly made of main support, sub-support, combined steel corbel, main support and sub-support welding
Stability triangle frame is formed, is welded by end part combination fashioned iron bracket and L-type steel plate collar tie beam, first road support system is formed；
The construction of step 05) second steel supporting system: bracing members are made of steel pipe, and steel purlin is made of Two bors d's oeuveres fashioned iron,
Expansion bolt fixed angles steel corbel bracket is set on the fender post of foundation pit two sides, sets up steel purlin.
Field control measures the verticality in the hole using the method for hanging plumb bob on drilling cramp in step 02), and brill can also be used
Machine carries verticality adjuster and controls drilling rod verticality, and field engineering technical staff carries out the centering of stake position and hangs down before every pile is constructed
Straight degree checks.After meeting the requirements, it can spud in.
In step 02) during drilling and forming hole, discovery drilling rod rock or it is difficult should slow down drilling depth when boring, prevent stake holes deflection,
Displacement and drilling tool damage are marked according to the drilling depth on drilling machine tower body, when pore-forming reaches designed elevation, stop drilling.
Scale is arranged before insertion, in the side of stake in single pile plumb bob bidirectional correcting during plant stake in step 02), stake,
Convenient for observing, recording in construction, when certain depth generation knockdown is inserted into stake, cannot be corrected using method is pulled firmly.
Column pile driving construction negligible amounts, using bored concrete pile, with tubular pole synchronous construction, Specific construction process: positioning → embedded
Casing → drilling → borehole cleaning → decentralization steel reinforcement cage → fixedly secured lattice column → downcomer → secondary pile hole cleaning → gaging hole depth → placement
Water proof ball → perfusion concrete → drilling machine displacement.
Steel support structure uses the steel pipe of a fixing end, a movable end and intermediate more piece different length in step 05)
Be formed by connecting by ring flange, while being equipped with the different pipe nipple steel pipe of partial-length, with adapt to foundation pit section width variation and tiltedly
Support length requirement.
Time, position and the prestressed size that bracing members are set up in step 05) are directly related to deep basal pit and stablize, and work as soil
When Fang Shuxiang is excavated to 50 ~ 80cm under bracing members position, sets up the road bracing members and apply prestressing force by regulation, make building enclosure
Receive reaction of bearing effect in advance, reduces the deformation of building enclosure.
Compared with existing bored concrete pile support technology, the technical effect that technical solution of the present invention generates is as follows: of the invention
PRC tubular pole assembled method for protecting support, have mechanized construction degree is high, speed of application is fast, scene is clean and tidy, short time limit, quality can
It leans on, pile is beautiful and good in economic efficiency beneficial effect.Compared with traditional bored concrete pile supporting, using PRC tubular pole as supporting
The method that H profile steel support in the road Zhuan Jishou replaces traditional concrete support, has the advantages that construction efficiency height and environmental protection are good, to shortening
Foundation pit construction duration, reduction cost are extremely beneficial.
Deep basal pit PRC tubular pole assembled method for protecting support of the invention solves existing mud when bored concrete pile campshed supporting construction
Slurry pollution and construction period are slowly insufficient, anti-side rigidity needed for which can satisfy deep foundation pit support when applying
And bending strength, it is not necessarily to mud off, mud contamination, while the use of fashioned iron standard element supporting form will not be generated, not only
It can satisfy the environmental requirement of civilized construction, construction period shortens, and PRC tubular pole material construction is relatively low, saves engineering
Cost.
Detailed description of the invention
Fig. 1 is construction process figure of the invention.
Fig. 2 is foundation pit schematic cross-sectional view of the present invention.
Fig. 3 is the local front view structure enlarged drawing in Fig. 2 at A.
Fig. 4 is the local overlooking structural schematic diagram in Fig. 2 at A.
Fig. 5 is the fragmentary bottom structural schematic diagram in Fig. 2 at A.
It is marked in figure are as follows: 1, fashioned iron bracket；2, main support；3, channel steel binder；4, second bracing members；5, steel purlin；6,
Tubular pole sprays mask；7, lattice column；8, PRC tubular pole；9, stand column pile；10, pile end board；11, triangular steel plate；12, fashioned iron；13,L
Shape steel plate；14, sub-support；15, oblique floor.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated technical solution of the present invention.
A kind of deep basal pit PRC tubular pole assembled method for protecting support, as shown in Fig. 1,2,3,4,5, pattern foundation pit supporting structure in the present embodiment
Stake is PRC tubular pole 8, and first road supporting form is H400 × 400 × 13 × 21 fashioned iron.Wherein, first road H400 × 400 × 13 × 21 types
The main support 2 of steel is attached with PRC tubular pole by fashioned iron bracket 1, passes through Two bors d's oeuveres 40a channel steel channel steel binder 3 at 7 position of lattice column
It is connected；Second bracing members 4 are acted on PRC tubular pole 8 by steel purlin 5, and steel purlin is close to tubular pole spray mask 6.Fashioned iron bracket
It is made of three piece of 450 × 450 × 20 triangular steel plate 11 and H390 × 300 × 10 × 16 fashioned iron 12, fashioned iron bracket passes through L-type steel
Plate 13 and pile end board 10 weld, the connection supporting point as H400 × 400 × 13 × 21 type steel supports and PRC tubular pole.H400
× 400 × 13 × 21 type steel supports are welded to form with twice H400 × 200 × 8 × 13 fashioned iron sub-supports 14 by oblique floor 15
Stability triangle form.Wherein, sub-support is erected on fashioned iron bracket, and is welded on the L-type steel plate at 10 top of end plate, main support
Then welded by H390 × 300 × 10 × 16 fashioned iron and L-type steel plate.
The method for protecting support of the present embodiment mainly includes the following steps:
Step 01) Construction in Preparatory Stage: carrying out levelling of the land to construction site, arranges tracking and command network, accurate true fixed pile.When piling
According to the stake site of releasing that stake machine is in place, piling answers that a level is true, pile body is vertical, and pile position deviation is not more than 50mm.
Step 02) PRC tubular pole supporting construction, comprising:
A. drilling machine is in place: after long spire favourable turn is in place, should make drilling rod perpendicular alignmnet stake position center, it is ensured that pile verticality allowable deviation
No more than 1%.Field control measures the verticality in the hole using the method for hanging plumb bob on drilling cramp, and it is included vertical that drilling machine can also be used
Straight degree adjuster controls drilling rod verticality；Field engineering technical staff carries out the centering of stake position and verticality inspection before every pile is constructed
It looks into.After meeting the requirements, it can spud in；
B. drilling and forming hole: when drilling starts, closing drill bit valve, when moving down drilling rod to drill bit and contacting to earth, starter motor drilling,
It is fast after first slow, while checking the deviation and timely correction of drilling.When finding that drilling rod rocks or hardly possible is bored in pore forming process, it should slow down
Drilling depth prevents stake holes deflection, displacement and drilling tool damage.According to the drilling depth label on drilling machine tower body, when pore-forming reaches designed elevation,
Stop drilling.
C. plant stake: PRC tubular pole is transported from tubular pole factory to scene, is stacked according to field condition, and pre- to what is marched into the arena
Tubulation stake carries out the inspection of presentation quality totally, not receives to undesirable tubular pole；
After pile hole construction, loop wheel machine should be in place immediately, and preparation hangs tubular pole, and tubular pole uses a section tubular pole, and tubular pole is inserted into stake position
Afterwards, it is first inserted into certain depth, then stablizes stake vertically, single pile plumb bob bidirectional correcting, perpendicularity deviation must not surpass when stake is inserted into
Cross 0.5%.Scale is arranged before insertion, in the side of stake in stake, convenient for observing, recording in construction, as found during steady stake
Stake out of plumb answers timely correction, when certain depth generation knockdown is inserted into stake, should not be corrected using method is pulled firmly；Finally adopt
Tubular pole is vibrated to designed elevation with vibreatory hammer.
Step 03) lattice column and lattice column column pile driving construction:
Lattice column column pile driving construction negligible amounts still use bored concrete pile, can be with tubular pole synchronous construction.Specific construction process: positioning
→ embedded casing → drilling → borehole cleaning → decentralization steel reinforcement cage → fixedly secured lattice column → downcomer → secondary pile hole cleaning → gaging hole is deep
→ place water proof ball → perfusion concrete → drilling machine displacement.For stand column pile due to negligible amounts, the mud of generation is seldom, to construction surrounding ring
Border influences less, and negligible amounts will not influence construction period.
Step 04) head channel type steel supporting system construction, comprising:
A. earth excavation, spray shield install Two bors d's oeuveres 40a channel steel binder to below ground 1.3m at lattice column；
B. use width for 500mm, the rectangular slat steel plate of thickness 20mm welds to form L-type steel with tubular pole top end plate respectively
Plate connects PRC campshed to form entirety instead of collar tie beam；
C. the support of first layer H profile steel is mainly by main support H400 × 400 × 12 × 21, sub-support H400 × 200 × 8 × 13, group
Mould assembly steel corbel composition, main support and sub-support weld to form stability triangle frame, pass through end part combination fashioned iron bracket and L-type steel
The welding of plate collar tie beam forms first road support system.
The construction of step 05) second steel supporting system:
Bracing members use 609 × 16mm of Φ steel pipe, and standard paragraphs rung level spacing is 3.6m；Steel purlin uses H400 × 200 × 8
× 13 Two bors d's oeuveres fashioned iron；Expansion bolt fixed angles steel corbel bracket is set on the fender post of foundation pit two sides, bracket spacing regards between fender post
Away from determination, steel purlin is set up.
Steel support structure design passes through method using the steel pipe of a fixing end, a movable end and intermediate more piece different length
Blue disk is formed by connecting, and merogenesis length determines as the case may be, while being equipped with the different pipe nipple steel pipe of partial-length, to adapt to base
Cheat section width variation and diagonal brace length requirement；Bracing members are processed in factory's merogenesis, are transported to construction site using platform trailer, existing
Field splicing.
Time, position and the prestressed size that bracing members are set up are directly related to deep basal pit and stablize；When the earthwork is vertically opened
When digging to 50cm under bracing members position or so, the road bracing members are set up in time and apply prestressing force by regulation, make building enclosure
Receive reaction of bearing effect in advance, reduces the deformation of building enclosure.
The present embodiment PRC tubular pole is finished peg, has higher bending resistance and shear resistance, can directly make after being transported to scene
With occupied area is small, convenient for municipal narrow and small place construction.In addition, the construction speed of tubular pole is fast, required mechanical equipment is few, and nothing
Must mud off, while accelerating construction progress, solve the problems, such as filling pile slurry overflow, outlet, ensure that construction field
Ground it is clean and tidy.And the use of H profile steel standard support component, it can not only increase the reuse rate of backing material, but also assemble
It is easier, quick, the foundation pit support construction time is reduced, shortens pattern foundation pit supporting structure and excavates the occupancy duration, and then shorten entire engineering
Construction period, create huge duration value.
Claims (7)
1. a kind of deep basal pit PRC tubular pole assembled method for protecting support, it is characterised in that: the method for protecting support includes the following steps:
Step 01) preparation of construction: carrying out levelling of the land to construction site, arranges SURVEYING CONTROL NETWORK, accurate true fixed pile, when piling
According to the stake site of releasing that stake machine is in place, pile position deviation is not more than 50mm；
Step 02) PRC tubular pole supporting construction, comprising:
A. drilling machine is in place: long spire favourable turn is in place, makes drilling rod perpendicular alignmnet stake position center, it is ensured that pile verticality deviation is not more than
1%；
B. drilling and forming hole: when drilling starts, closing drill bit valve, when moving down drilling rod to drill bit and contacting to earth, starter motor drilling,
It is fast after first slow, while checking the deviation and timely correction of drilling；
C. plant stake: after pile hole construction, loop wheel machine should be in place immediately, and preparation hangs tubular pole, and tubular pole uses a section tubular pole, and tubular pole is inserted
After entering stake position, it is first inserted into 1.5 ~ 2m, then stablize stake vertically, perpendicularity deviation must not exceed 0.5% when stake is inserted into, in steady stake
As found, stake out of plumb answers timely correction in journey, and tubular pole is finally vibrated to designed elevation using vibreatory hammer；
Step 03) stand column pile, lattice column construction；
Step 04) head channel type steel supporting system construction, comprising:
A. earth excavation, spray shield install Two bors d's oeuveres channel steel binder to original ground at lattice column；
B. it welds to form L-type with tubular pole top end plate respectively using rectangular slat steel plate, connects PRC campshed instead of collar tie beam to be formed
It is whole；
C. first layer H profile steel support is mainly made of main support, sub-support, combined steel corbel, main support and sub-support welding
Stability triangle frame is formed, is welded by end part combination fashioned iron bracket and L-type steel plate collar tie beam, first road support system is formed；
The construction of step 05) second steel supporting system: bracing members are made of steel pipe, and steel purlin is made of Two bors d's oeuveres fashioned iron,
Expansion bolt fixed angles steel corbel bracket is set on the fender post of foundation pit two sides, sets up steel purlin.
2. a kind of deep basal pit PRC tubular pole assembled method for protecting support according to claim 1, it is characterised in that: in step 02)
Field control measures the verticality in the hole using the method for hanging plumb bob on drilling cramp, and drilling machine can also be used and carry verticality adjuster
Drilling rod verticality is controlled, field engineering technical staff carries out the centering of stake position and verticality inspection before every pile is constructed, and meets the requirements
Afterwards, it can spud in.
3. a kind of deep basal pit PRC tubular pole assembled method for protecting support according to claim 1, it is characterised in that: in step 02)
During drilling and forming hole, when discovery drilling rod rocks or hardly possible is bored, drilling depth should be slowed down, prevent stake holes deflection, displacement and drilling tool damage, root
According to the drilling depth label on drilling machine tower body, when pore-forming reaches designed elevation, stop drilling.
4. a kind of deep basal pit PRC tubular pole assembled method for protecting support according to claim 1, it is characterised in that: in step 02)
Scale is arranged before insertion, in the side of stake in single pile plumb bob bidirectional correcting during plant stake, stake, convenient for being observed in construction,
Record when certain depth generation knockdown is inserted into stake, cannot be corrected using method is pulled firmly.
5. a kind of deep basal pit PRC tubular pole assembled method for protecting support according to claim 1, it is characterised in that: stand column pile is applied
Work negligible amounts, using bored concrete pile, with tubular pole synchronous construction, Specific construction process: positioning → embedded casing → drilling → borehole cleaning
→ decentralization steel reinforcement cage → fixedly secured lattice column → downcomer → secondary pile hole cleaning → gaging hole depth → placement water proof ball → perfusion concrete →
Drilling machine displacement.
6. a kind of deep basal pit PRC tubular pole assembled method for protecting support according to claim 1, it is characterised in that: in step 05)
Steel support structure is connected using the steel pipe of a fixing end, a movable end and intermediate more piece different length by ring flange
At, while it being equipped with the different pipe nipple steel pipe of partial-length, to adapt to the variation of foundation pit section width and diagonal brace length requirement.
7. a kind of deep basal pit PRC tubular pole assembled method for protecting support according to claim 1, it is characterised in that: in step 05)
Time, position and the prestressed size that bracing members are set up are directly related to deep basal pit and stablize, when the earthwork is vertically excavated to steel branch
When supportting 50 ~ 80cm under position, sets up the road bracing members and apply prestressing force by regulation, building enclosure is made to receive reaction of bearing in advance
Effect, reduces the deformation of building enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811267010.6A CN109235453B (en) | 2018-10-29 | 2018-10-29 | Deep foundation pit PRC pipe pile assembled supporting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811267010.6A CN109235453B (en) | 2018-10-29 | 2018-10-29 | Deep foundation pit PRC pipe pile assembled supporting method |
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| Publication Number | Publication Date |
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| CN109235453A true CN109235453A (en) | 2019-01-18 |
| CN109235453B CN109235453B (en) | 2021-05-18 |
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ID=65078903
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811267010.6A Active CN109235453B (en) | 2018-10-29 | 2018-10-29 | Deep foundation pit PRC pipe pile assembled supporting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134902A (en) * | 2021-12-10 | 2022-03-04 | 中电建路桥集团有限公司 | Reinforced concrete supporting structure for soft soil deep foundation pit and construction process of reinforced concrete supporting structure |
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| CN101255697A (en) * | 2008-04-10 | 2008-09-03 | 王平 | Method for integrally applying prestress to truss-type inner support of deep foundation pit |
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