CN109056775A - Reverse construction method for anti-overturning anchor cable of bearing platform foundation - Google Patents
Reverse construction method for anti-overturning anchor cable of bearing platform foundation Download PDFInfo
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- CN109056775A CN109056775A CN201810838920.9A CN201810838920A CN109056775A CN 109056775 A CN109056775 A CN 109056775A CN 201810838920 A CN201810838920 A CN 201810838920A CN 109056775 A CN109056775 A CN 109056775A
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 73
- 239000010959 steel Substances 0.000 claims abstract description 73
- 238000005553 drilling Methods 0.000 claims abstract description 31
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims 1
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000012797 qualification Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
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- 239000003973 paint Substances 0.000 description 2
- 239000010454 slate Substances 0.000 description 2
- 241000537371 Fraxinus caroliniana Species 0.000 description 1
- 235000010891 Ptelea trifoliata Nutrition 0.000 description 1
- 206010038743 Restlessness Diseases 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
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- 210000003205 muscle Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
-
- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A reverse construction method for an anti-overturning anchor cable of a bearing platform foundation adopts measures of pre-embedding a steel protective cylinder in a bearing platform as a reverse construction drilling channel of an anchor cable body and the like. The construction method starts from the links of manufacturing a steel casing, excavating a foundation cushion cap, binding reinforcing steel bars of the foundation cushion cap, measuring and placing hole positions of a foundation anchor cable body, pre-burying and fixing the steel casing, pouring concrete of the foundation cushion cap, drilling the foundation cushion cap anchor cable body (pier stud construction above the foundation), installing and grouting the anchor cable body, stretching the anchor cable body, sealing the anchor and the like, solves the construction problems that the foundation anchor cable body and the structure above the foundation cannot be simultaneously considered, and simultaneously solves the construction problems that the foundation of the foundation cushion cap is not softened by water and the site is not polluted. The construction method can accelerate the construction progress of the foundation anchor cable and the upper structure, improve the construction efficiency and reduce the cost.
Description
Technical field
The present invention relates to a kind of cushion cap foundation antidumping anchor cable reversed construction methods.
Background technique
In field of civil engineering, when basic narrow space, when basic superstructure and very big basic depth-width ratio, need to pass through
Pillarwork and ground are linked to be entirety by setting antidumping anchor cable, and a part is worked together with pillarwork based on anchor cable,
It topples power to which foundation can effectively resist top pillarwork.
The usual sequence of construction of cushion cap foundation antidumping anchor cable is that basic anchor cable construction followed by arrives foundation construction again to top
Structure construction；Entire construction speed is linearly followed the prescribed order progresss, and long construction period, to put into construction cost more.Anchor cable drilling is applied
Work needs submersible, causes to drill out powder, gravel, water blending form sposh together, influences construction site civilization and applies
Work, softening ground influence foundation construction quality, and these problems are often that responsible departments of the government and owner complain more quality to ask
One of topic.It for the design of this long-standing problem, builds, the problem of construction party, we had inquired into a variety of methods to solve this in the past
A problem, but effect is all undesirable.
Summary of the invention
The present invention solves the deficiencies in the prior art and providing one kind softens cushion cap foundation ground by water, and place is not dirty
Dye, while the cushion cap foundation antidumping anchor cable reversed construction method that basis and Superstructure Construction degree of progress speed, cost reduce, this
Invention is suitable for construction operation faciostenosis, and cushion cap foundation superstructure and basic depth-width ratio greatly and have building for antidumping anchor cable requirement
Build object or structures engineering.
In order to solve the above technical problem, the present invention provides a kind of cushion cap foundation antidumping anchor cable reversed construction method, packets
Include steel pile casting production, foundation platform excavates, the binding of foundation platform reinforcing bar, basic anchor cable hole location measuring, the pre-buried fixation of steel pile casting, base
The concreting of plinth cushion cap, foundation platform anchor cable drilling (basis above pier stud construction), anchor cable is installed and slip casting, anchorage cable stretching and
Sealing off and covering anchorage the steps include:
A, cushion cap foundation excavates
4 angle points of cushion cap foundation and 300 ㎜ control line of base side are released with theodolite, are carried out after sprinkling gray line using digging machine
Basic earthwork evacuation more than substrate is reserved 200mm the cubic meter using manually carrying out clearing up the substrate cubic metre of earth and stone, is poured after test slot of foundation
It builds concrete cushion and carries out closed base.
B, steel pile casting processing and fabricating
According to the caliber of anchor cable bunchy body size design steel pile casting, the more basic anchor cable bunchy body of size to steel pile casting inner wall
Big 25mm, steel pile casting are welded using coating steel pipe and means for supporting reinforcement steel bar, and means for supporting reinforcement steel bar top fulcrum is uniformly welded in steel pipe
A-frame, deviation when pre-buried to prevent steel pipe are formed at highly 2/3.
C, cushion cap foundation reinforcing bar is bound
Cushion cap foundation bedding plane draws cushion cap steel bar stress spacing with slate pencil, is adjusted in cushion cap reinforcing bar is processed with tower crane
Binding
D, basic anchor cable hole location measuring
It is required according to design arrangement, with total station by the accurate measuring in anchor hole position in foundation trench bottom surface, and is being applied with red paint
Anchor cable position of opening is indicated in position by the Ministry of worker.Anchor hole position deviation must not exceed ± 20mm.To the anchor hole position of measuring and acceptance(check)
It is numbered.
Orifice position absolute altitude is measured simultaneously when measuring hole location, anchor cable makes blanking, installation site controls foundation as calculating.
E, the pre-buried fixation of steel pile casting
After the completion of anchor cable hole location measuring, steel pile casting is directed at anchor cable position of opening, steel pile casting bottom outside cement mortar
Closing, runs into casing, steel pile casting is fixed in cushion cap by three means for supporting reinforcement steel bar, support frame to prevent base concrete slurries
It is fixed with the muscle spot welding of cushion cap bottom bottom, prevents deviation in concreting process.Length of steel pipe is calculated according to base thickness, anchorage
It determines, anchorage pad top and basic top surface are flat.
F, cushion cap foundation concreting
After the installation of steel pile casting, base concrete is poured.It should ensure that steel pipe is located at anchor cable hole center before concreting, and
Keep vertical；Tube top portion is blocked with Fibre Bag simultaneously, prevents concrete from flowing into steel pipe.
G, cushion cap foundation anchor cable drills
Reach 25% to cushion cap foundation concrete strength and starts basic superstructure of constructing, cushion cap foundation concrete strength
75% starts anchor hole of constructing, and adjustment rig substructure is substantially at horizontality, adjusts drilling machine mast, it is ensured that in drilling machine pore forming process
Anchor hole perpendicularity deviation≤1%；Drilling machine crisis position is all around finely tuned, guarantees that drilling rod is directed at aperture centre deviation≤20mm；
In drilling process, according to the soft or hard difference in stratum, air compressor machine blast pressure and air quantity are adjusted in due course, adjusts drilling pressure and speed,
Guarantee that landwaste is timely in hole, is smoothly discharged outside hole；Soft stratum air compressor machine wind pressure wants small, and rate of penetration is slightly slow；Ragstone wind
Pressure is high, and rate of penetration is accelerated.
After the completion of drilling, drilling rod is put to bottom hole, is blown out rock powder in hole using high-pressure blast (0.3~0.4MPa of wind pressure)
Outside hole, until aperture is without landwaste discharge.
H, anchor cable installation and slip casting
After steel strand wires bunchy, its length and diameter is checked, before the installation of anchor cable body, after high-pressure blast aperture blowing, slowly by anchor
Cable body is put into hole, and anchor cable, which is put into hole, to be consistent with bore angle, after anchor cable body is pushed to predetermined depth, is checked
Whether Grouting Pipe is unimpeded.The steel strand wires length that hole exposes outside finally is measured with steel ruler, it is ensured that anchorage length.
Cement slurry stirs evenly, with stirring with and being finished before initial set.Grouting pressure control is in 0.4MPa or so, slurry
Liquid passes through Grouting Pipe continuous pouring from bottom to top, and the continuous grouting of single anchor cable is completed in one hour.
I, anchorage cable stretching and sealing off and covering anchorage
When cement slurry compression strength reaches 15MPa, spiral bar is put by corresponding number and installs work anchor slab, each
Anchor hole is respectively packed into a set of intermediate plate, and gently beats together, first to the pre- tensioning of anchor cable 1~2 time, keeps the contact at its each position close, the body of rod
It is totally straight；It is carried out when formal tensioning by the tensioning speed of 40kN/min.Tensioning designs axial tension value N to 1.1~1.2tWhen,
It is kept for 10 minutes, then off-load carries out locking operation to locking load.
It works after tensioning fixation and reserves 100mm anchor cable after anchor slab, cut extra steel strand wires, carry out sealing off and covering anchorage concrete.
The present invention does not carry out basic anchor cable construction first after cushion cap foundation excavation, but directly binds foundation platform reinforcing bar,
By one of steel pile casting pre-buried in cushion cap as anchor cable adverse construction method drilled tunnel.I.e. steel after the binding of foundation platform reinforcing bar
Casing is pre-buried to be fixed in steel reinforcement cage, and base concrete is then poured, and is reached 25% to cushion cap foundation concrete strength and is started to apply
Work basis superstructure, cushion cap foundation concrete strength 75% start anchor hole of constructing, begin to use geological drilling rig by steel pile casting
It drills, by steel pile casting drilling construction water is drained in a organized way, be not detained in foundation platform, it will not be to ground
It impacts, place is not contaminated, and after the completion of such foundation platform construction, basic superstructure can up construct, basic anchor
Rope construction can drill in cushion cap face, and superstructure and lower part anchor cable construction do not influence mutually, drop of both having speeded up the work
Low construction cost, and avoid generating water ash admixture softening basic foundation in boring procedure, avoid dirty construction site, unrest, difference.
In conclusion the present invention, which is one, can effectively combine basic anchor cable and basic Superstructure Construction, accelerate work
Journey construction speed reduces construction cost, prevents foundation from being softened by water, the contaminated antidumping anchor cable body adverse construction method in place
Method, the present invention are suitable for construction operation faciostenosis, and cushion cap foundation superstructure and basic depth-width ratio are big and have antidumping anchor cable
It is required that building or structures engineering.
Detailed description of the invention
Fig. 1 is steel pile casting schematic diagram of the present invention.
Fig. 2 is antidumping anchor cable construction schematic diagram of the present invention.
Fig. 3 is construction process figure of the present invention.
Each label indicates in figure:
1, basic top pillarwork；2, Grouting Pipe；3, sealing off and covering anchorage concrete；4, anchorage；5, spiral bar；6, cushion cap foundation；
7, coating steel pipe；8, means for supporting reinforcement steel bar；9, cement mortar；10, ground；11, cushion cap steel bar stress；12, anchor cable；13, cement slurry
Body；
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
(1), cushion cap foundation excavates
The 300 ㎜ control line of 4 angle points and base side that cushion cap foundation 6 is released with theodolite uses digging machine after sprinkling gray line
Basic earthwork evacuation is carried out, more than substrate reserves 200mm cubic meters using the cleaning substrate cubic metre of earth and stone is manually carried out, ground 10 is tested
Slot after-pouring 100mmC20 concrete cushion carries out closed base.
(2), steel pile casting processing and fabricating
According to the caliber of anchor cable bunchy body size design steel pile casting, the more basic anchor cable bunchy body of size to steel pile casting inner wall
Big 25mm, steel pile casting is welded using the coating steel pipe 7 and 16 means for supporting reinforcement steel bar 8 of φ of 200 × 6mm of φ, on means for supporting reinforcement steel bar 8
It holds long 150mm to be close to coating steel pipe 7, is fixed at 7 height 2/3 of coating steel pipe using spot welding and forms A-frame, to prevent zinc-plated
Deviation when steel pipe 7 is pre-buried.
(3), cushion cap foundation reinforcing bar is bound
10 bedding plane of cushion cap ground draws 11 spacing of cushion cap steel bar stress with slate pencil, is adjusted to hold with tower crane reinforcing bar is processed
Binding in platform
(4), basic anchor cable hole location measuring
It is required according to design arrangement, with total station by the accurate measuring in anchor hole position in 10 bottom surface of ground, and is existed with red paint
Construction part indicates 12 position of opening of anchor cable.Anchor hole position deviation must not exceed ± 20mm.To the anchor hole of measuring and acceptance(check)
Position is numbered.
When measuring hole location simultaneously measure orifice position absolute altitude, as calculate anchor cable 12 make blanking, installation site control according to
According to.
(5), the pre-buried fixation of steel pile casting
After the completion of 12 hole location measuring of anchor cable, steel pile casting is directed at 12 position of opening of anchor cable, steel pile casting bottom outside M10 water
Cement mortar 9 is closed, and is run into casing to prevent base concrete slurries, and the coating steel pipe 7 of steel pile casting passes through three means for supporting reinforcement steel bar 8
It is fixed in cushion cap, the long 200mm in 8 lower end of support frame is fixed with 2 11 spot welding of cushion cap steel bar stress, prevents concreting process
Middle deviation.Steel pile casting length is calculated according to base thickness, anchorage and is determined, anchorage pad top and 6 top surface of cushion cap foundation are flat.
(6), foundation platform concreting
After the installation of steel pile casting, base concrete is poured.It should ensure that coating steel pipe 7 is located at 12 hole of anchor cable before concreting
Center, and keep vertical；7 top of coating steel pipe is blocked with Fibre Bag simultaneously, prevents concrete from flowing into coating steel pipe 7.
(7), foundation platform anchor cable drills
Reach 25% to 6 concrete strength of cushion cap foundation and starts basic top pillarwork 1 of constructing, 6 coagulation of cushion cap foundation
Native intensity 75% starts 12 anchor hole of anchor cable of constructing.Adjustment rig substructure is substantially at horizontality, adjusts drilling machine mast, it is ensured that bores
Anchor hole perpendicularity deviation≤1% in machine pore forming process；Drilling machine crisis position is all around finely tuned, guarantees that drilling rod is directed at orifice center
Deviation≤20mm；In drilling process, according to the soft or hard difference in stratum, air compressor machine blast pressure and air quantity, adjustment drilling are adjusted in due course
Pressure and speed guarantee that landwaste is timely in hole, is smoothly discharged outside hole；Soft stratum air compressor machine wind pressure wants small, and rate of penetration is slightly slow；
Ragstone wind pressure is high, and rate of penetration is accelerated.
After the completion of drilling, drilling rod is put to bottom hole, is blown out rock powder in hole using high-pressure blast (0.3~0.4MPa of wind pressure)
Outside hole, until aperture is without landwaste discharge.
(8), anchor cable installation and slip casting
After steel strand wires bunchy, before checking that its length and diameter, anchor cable 12 are installed, after high-pressure blast aperture blowing, slowly by anchor
Rope 12 is put into hole, and anchor cable 12, which is put into hole, to be consistent with bore angle, after anchor cable 12 is pushed to projected depth, inspection
Whether unimpeded look into Grouting Pipe 2.12 length of anchor cable that hole exposes outside finally is measured with steel ruler, it is ensured that anchorage length.
Cement slurry 13 stirs evenly, with stirring with and being finished before initial set.Grouting pressure is controlled in 0.4MPa or so,
Slurries pass through the continuous pouring from bottom to top of Grouting Pipe 2, and the continuous grouting of single anchor cable 12 is completed in one hour.
(9), anchorage cable stretching and sealing off and covering anchorage
When 13 compression strength of cement slurry reaches 15MPa, spiral bar 5 is put by corresponding number and installs working instrument anchor 4,
Each anchor hole is respectively packed into a set of intermediate plate, and gently beats together, first to 12 pre- tensioning of anchor cable 1~2 time, keeps the contact at its each position tight
Close, the body of rod is totally straight；It is carried out when formal tensioning by the tensioning speed of 40kN/min.Tensioning designs axial tensions to 1.1~1.2
Value NtWhen, it is kept for 10 minutes, then off-load carries out locking operation to locking load.
It works after tensioning fixation and reserves 100mm anchor cable 12 after anchor slab, cut extra steel strand wires, sealing off and covering anchorage is carried out using C30
Concrete 3.
Claims (8)
1. a kind of cushion cap foundation antidumping anchor cable reversed construction method, characterized by the following steps:
A, cushion cap foundation excavates:
Four angle points of cushion cap foundation and base side control line are released with theodolite, then cushion cap foundation is excavated, form foundation trench, base
Slot check of foundation subsoil after-pouring concrete cushion carries out closing foundation trench substrate；
B, steel pile casting processing and fabricating:
Steel pile casting length determines that the size of the caliber and anchor cable body bunchy body of steel pile casting matches according to the thickness of cushion cap foundation；
C, cushion cap foundation reinforcing bar is bound:
Reinforcing bar is hung to foundation trench substrate to be bound；
D, basic anchor cable hole location measuring:
It with total station measuring anchor cable hole in foundation trench basal surface position, and indicates anchor cable position of opening, measuring anchor cable hole site is checked and accepted,
Anchor cable hole site is numbered after qualification, measures anchor cable hole orifice position absolute altitude when measuring anchor cable hole hole location simultaneously；
E, the pre-buried fixation of steel pile casting:
After the completion of anchor cable hole location measuring, steel pile casting alignment anchor cable position of opening is fixed in foundation trench substrate by support frame, steel
Gap between casing bottom and foundation trench substrate is closed with cement mortar, and support frame and the reinforcing bar of foundation trench substrate are fixed；
F, cushion cap foundation concreting:
After the installation of steel pile casting, cushion cap foundation concrete is poured；
G, cushion cap foundation anchor cable drills:
Cushion cap foundation concrete strength reach final strength 75% start construct anchor hole, the drilling rod of drilling machine is co-axially located at steel
In casing, so that drill bit is contacted with foundation trench substrate, in drilling process, according to the soft or hard difference in stratum, air compressor machine blast pressure is adjusted
And air quantity, adjust drilling pressure and speed；Soft stratum air compressor machine wind pressure wants small, and rate of penetration is slightly slow；Ragstone wind pressure is high,
Rate of penetration is accelerated；
H, anchor cable installation and slip casting:
After steel strand wires bunchy, check that after high-pressure blast aperture blowing, anchor cable is put into before the installation of anchor cable body for steel strand wires length and diameter
In hole, anchor cable, which is put into hole, to be consistent with bore angle, after anchor cable is pushed to predetermined depth, whether check Grouting Pipe
Unimpeded, slip casting: slurries use Grouting Pipe continuous pouring from bottom to top, and the continuous grouting of single anchor cable is completed in one hour；
I, anchorage cable stretching and sealing off and covering anchorage:
When cement slurry compression strength after slip casting reaches 15MPa, is numbered accordingly by anchor cable hole and put spiral bar, installed
Work anchor slab, and each anchor hole is respectively packed into a set of intermediate plate, and guarantees that intermediate plate is concordant, first to the pre- tensioning of anchor cable 1~2 time, make anchor cable with
The contact at each position is close, then formal stretch-draw anchor, carries out by the tensioning speed of 40kN/min, tensioning to anchorage cable design axial direction
Value of thrust (1.1~1.2) NtWhen, it is kept for 10 minutes, then off-load carries out locking operation to locking load, using C30 concrete
Sealing off and covering anchorage.
2. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step a,
200mm cubic meters are reserved when basic earthwork evacuation, in substrate carries out the cleaning substrate cubic metre of earth and stone using artificial.
3. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step b, steel
Casing is welded using coating steel pipe and means for supporting reinforcement steel bar, and means for supporting reinforcement steel bar top fulcrum is arranged in coating steel pipe height 2/3
Place forms A-frame.
4. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step d, test
Time receiving, anchor hole position deviation must not exceed ± 20mm.
5. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step f, mix
Solidifying soil guarantees that steel pile casting is located at anchor cable hole center before pouring, and keeps vertical, while will be blocked at the top of steel pile casting with Fibre Bag, prevents
Only concrete flows into steel pile casting.
6. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step g,
Before drilling, rig substructure is adjusted to horizontal, adjustment drilling machine mast, it is ensured that anchor hole perpendicularity deviation≤1% in drilling machine pore forming process；
Borer drill rod position is all around finely tuned, guarantees that drilling rod is directed at aperture centre deviation≤20mm；After the completion of drilling, drilling rod is put
To bottom hole, rock powder in hole is blown out outside hole using 0.3~0.4MPa of wind pressure, until aperture is without landwaste discharge.
7. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step h, note
Pressure control is starched in 0.4MPa.
8. cushion cap foundation antidumping anchor cable reversed construction method according to claim 1, it is characterised in that: in step i,
It works after zipper is fixed and reserves 100mm anchor cable after anchor slab, cut extra steel strand wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838920.9A CN109056775A (en) | 2018-07-27 | 2018-07-27 | Reverse construction method for anti-overturning anchor cable of bearing platform foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838920.9A CN109056775A (en) | 2018-07-27 | 2018-07-27 | Reverse construction method for anti-overturning anchor cable of bearing platform foundation |
Publications (1)
| Publication Number | Publication Date |
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| CN109056775A true CN109056775A (en) | 2018-12-21 |
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| CN201810838920.9A Pending CN109056775A (en) | 2018-07-27 | 2018-07-27 | Reverse construction method for anti-overturning anchor cable of bearing platform foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110158498A (en) * | 2019-05-30 | 2019-08-23 | 中铁二院工程集团有限责任公司 | A kind of elasticity passive protection net pillar construction and construction method |
| CN110747880A (en) * | 2019-10-30 | 2020-02-04 | 中建五局第三建设有限公司 | Construction method of high slope isolation bearing platform |
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| CN201381516Y (en) * | 2009-04-10 | 2010-01-13 | 中冶京唐建设有限公司 | Embedded bracket for mounting foundation bolt with large diameter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158498A (en) * | 2019-05-30 | 2019-08-23 | 中铁二院工程集团有限责任公司 | A kind of elasticity passive protection net pillar construction and construction method |
| CN110158498B (en) * | 2019-05-30 | 2024-01-23 | 中铁二院工程集团有限责任公司 | Construction method of elastic passive protective net upright post structure |
| CN110747880A (en) * | 2019-10-30 | 2020-02-04 | 中建五局第三建设有限公司 | Construction method of high slope isolation bearing platform |
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Application publication date: 20181221 |