CN107604903A - A kind of miniature steel pipe isolation pile reinforced construction method - Google Patents
A kind of miniature steel pipe isolation pile reinforced construction method Download PDFInfo
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- CN107604903A CN107604903A CN201710799540.4A CN201710799540A CN107604903A CN 107604903 A CN107604903 A CN 107604903A CN 201710799540 A CN201710799540 A CN 201710799540A CN 107604903 A CN107604903 A CN 107604903A
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Abstract
The invention belongs to tunnel excavation technical field of construction; specifically related to it is a kind of for city tunnel tunneling prevent along building destruction miniature steel pipe isolation pile guard method; using down-the-hole drill drilling and its boring method; a large amount of dregs, mud will not be produced; effect on environment is small, and reduces the destruction to road structure layer.And this boring method short construction period, speed is fast, and occupied ground is small, facilitates traffic organization, small to resident's interference, and a large amount of machineries and energy consumptions have been saved compared to traditional bore mode；Down-the-hole drill installs dry collector additional, improves rig service behaviour, and pollution source is controlled, effectively controls airborne dust to produce, ensures clean manufacturing；Ground compactness can be increased using cement mortar, the slip casting of waterglass dual slurry, supporting course is formed, avoid the influence of collapsible loess, the security of building structure can be ensured.
Description
Technical field
The invention belongs to city tunnel Mined field, and in particular to be used for one kind along tunnel excavation prevents
The miniature steel pipe isolation pile guard method of building destruction.
Background technology
The general buried depth in urban road tunnel is shallower, while is passed through under original road, along both sides present situation building structures compared with
More, the boring construction in tunnel can cause the larger differential settlement in ground, and larger safety is brought to building structures along the line
Hidden danger, the lighter cause differential settlement crack occur, and severe one causes inclination or deformation, forms high tower, cause larger economic damage
Become estranged bad social influence.To prevent such phenomenon from occurring, construction reinforced concrete filling pile is used typically between tunnel and building,
Protected, prevent differential settlement.But such a way is not easy to implement in city, and cost is high, has greater environmental impacts.
To intend holing using isolation pile, to carry out cut-off with Existing reinforced concrete bridge building be a kind of relatively effective reduction constructing tunnel to both
There is the method for building deformation effect.Isolation pile reinforcement principle is the big characteristic of ratio of rigidity soil using stake, makes stake top and stake bottom
Soil body sedimentation reaches unanimity；Isolation pile is primarily subjected to rub caused by soil lateral pressure caused by excavation construction and ground difference simultaneously
The development of deformation of the soil body, reduces the deformation of the soil body after isolation pile after resistance limitation stake.
And during existing isolation pile construction, construction drill is routinely bored using circulation drilling machine, large-scale percussive drill or geology
Machine, long construction period take larger place, it is necessary to prepare or produce a large amount of mud, the construction infection resident trip in city,
Boring procedure produces a large amount of dust, forms harm to city dweller's health, while larger pollution is caused to environment, consume in addition compared with
The big energy, city dweller is disturbed also larger.In addition, existing isolation pile construction method runs into collapsible loess soil property
When, the security of building building structure can not be protected.
The content of the invention
The present invention is solution the deficiencies in the prior art, there is provided a kind of miniature steel pipe isolation pile reinforced construction method.
The present invention is achieved by the following technical solutions：A kind of miniature steel pipe isolation pile reinforced construction method, including such as
Lower step：
（1）Drill hole of drilling machine：Drilled using down-the-hole drill, dry collector is installed on down-the-hole drill additional, when down-the-hole drill works
The tight cover down-the-hole drill aperture of dust hood of dry collector.First, after down-the-hole drill is fixed in place by guide pipe design attitude, edge
Guide pipe applies brill, and drilling diameter 130mm, down-the-hole drill, which gently forces down, before 1.0m is crept into turns, and normal drilling rate is transferred to after creeping into 1.0m.
Two row hole drillings are set between tunneling and existing building, the adjacent spacing of wells is 0.5m, and drilling array pitch is 1.0m, is used
Apply the 1 jump stake sequence construction drilling every 2.It is 3m that the drilling rod of down-the-hole drill, which often saves length, extension bar in boring procedure, extension bar it is specific
Method is as follows：First segment drilling rod pierces rock-soil layer, stops drilling during afterbody residue 20-30cm, manually uses pipe wrench clamping drilling rod,
Then down-the-hole drill low speed and reverse, drilling rod is disengaged；When down-the-hole drill is stepped back along guide rail, manually load second drilling rod, second
Drilling rod front end installs coupling sleeve, and second drilling rod low speed is delivered into first drilling rod afterbody, direction pair by down-the-hole drill
It is coupled after standard integral.Each extension drill rod, carried out by above-mentioned extension bar method.Last down-the-hole drill drilling to completion, is moved back
Drilling rod pore-forming borehole cleaning；
（2）Send pipe：Borehole cleaning terminate after immediately using crane insertion steel pipe, steel pipe uses Φ 108mm hot rolled seamless steel tubes, outside steel pipe
Expose trench bottom 30cm, to connect Grouting Pipe；
（3）Steel pipe spreading：To dock steel pipe, when the first segment pipe in every hole is set, 3m and 4.5m steel is used in odd, even hole respectively
Pipe, often saves and uses long 4.5m steel pipes later.First previous steel pipe is headed into the hole being drilled during steel pipe spreading, using inner sleeve
It is coupled.When in previous steel pipe advancement holes, outside hole during remaining 30-40cm, hand fit's crane loads onto later section steel pipe, manually
Later section steel pipe is bound up on inner sleeve, joined together two section steel pipes using long 15cm screw thread；
（4）Mixing dual slurry：Dual slurry is made up of cement mortar and waterglass, wherein slip casting when cement mortar and waterglass volume
Than for 1:1, the wherein ratio of mud of cement mortar is 0.6:1, cement mortar carries out mixing using mortar mixer, the good cement of mixing
Slurry is put into 1m × 1m × 1m ash-pits of steel, and waterglass is put into another ash-pit.Grouting Pipe is directly connected to steel by slip casting machine
On the slip casting link steel pipe of pile tube, interface is connected using silk mouth, and Grouting Pipe is conveyed using rubber tube；
（5）Slip casting：Dual slurry is irrigated into steel pipe with Double-liquid mud-injection pump, when irrigating dual slurry, the volume of cement mortar and waterglass
Than for 1:1, grouting pressure 0.2MPa, carry out during slip casting, 2 hours after first time slip casting, after slurries initial set, carry out in two times
Secondary pressure slip casting, untill filling, after slip casting wouldn't tube drawing, untill cement mortar flows out outside pipe, extract Grouting Pipe
Sealed steel pipe end.
Further, in step（1）In, down-the-hole drill scene is equipped with two drill bits.
Further, in step（2）In, lifted by crane using during crane insertion steel pipe lifting steel pipe using some colligations.
Beneficial effects of the present invention are：
First, using down-the-hole drill drilling and its boring method, a large amount of dregs, mud will not be produced, effect on environment is small, and reduces
Destruction to road structure layer.And this boring method short construction period, speed is fast, and occupied ground is small, facilitates traffic organization, right
Resident's interference is small, and a large amount of machineries and energy consumption have been saved compared to traditional bore mode；
2nd, down-the-hole drill installs dry collector additional, improves rig service behaviour, and pollution source is controlled, and effectively control is raised
Dirt produces, and ensures clean manufacturing；
3rd, ground compactness can be increased using cement mortar, the slip casting of waterglass dual slurry, forms supporting course, avoid collapsible loess
Influence, the security of building structure can be ensured；
4th, double insulation blocking stake is formed using φ 108mm steel pipes and slip casting, structure is more firm；
5th, steel-pipe pile construction drill is using applying the 1 jump stake sequence construction every 2, avoids during drilling and mortar depositing construction to building
Build perturbing and producing larger valve pit subsidence for thing basis.
Embodiment
Specific embodiment of the invention given below is, it is necessary to which explanation is that the invention is not limited in implement in detail below
Example, all equivalents done on the basis of technical scheme each fall within protection scope of the present invention.
A kind of miniature steel pipe isolation pile reinforced construction method, comprises the following steps：
（1）Drill hole of drilling machine
Drilled using down-the-hole drill, install dry collector on down-the-hole drill additional, install dry collector additional on down-the-hole drill
Belong to prior art in the art, no longer its structure, principle and installation method are repeated here.Down-the-hole drill installs additional dry
After formula deduster, down-the-hole drill service behaviour is substantially improved, effective control has been carried out to pollution source, has been effectively controlled
Airborne dust produces, and ensures clean manufacturing.By the tight cover down-the-hole drill aperture of the dust hood of dry collector during work, bottom hole soil particle,
Rock dust is blown to aperture by dust discharge blast, then under the suction collective effect of dedusting fan, dust enters Gas inlet tube by dust hood, warp
Dust removal by filtration and final dusting, dust are collected by ash bucket, and purification air is discharged into air by air flue, and dry collector is also this area
Interior known device, its working process and principle is also repeated no more here.
Down-the-hole drill is debugged first before drilling, it is ensured that after each side reaches requirement, down-the-hole drill is set by guide pipe
Count position it is fixed in place after, apply brill along guide pipe, drilling diameter 130mm, before 1.0m is crept into, down-the-hole drill low pressure low speed rotation
It is dynamic, to ensure perforate quality, normal drilling rate is transferred to after creeping into 1.0m.Two gang drills are set between tunneling and existing building
Hole, the adjacent spacing of wells are 0.5m, and drilling array pitch is 1.0m, using apply 1 every 2 jump stake sequence construction drill.Accomplish during drilling
Just, pile body is straight, when applying brill, prevents excessive flutter effect from applying brill precision for stake position.It is 3m that the drilling rod of down-the-hole drill, which often saves length, drilling
Shi Bixu extension bars.The specific method of extension bar is as follows：First segment drilling rod pierces rock-soil layer, stops boring during afterbody residue 20-30cm
Enter, manually use pipe wrench clamping drilling rod, pay attention to here must not filament threaded port, then down-the-hole drill low speed and reverse, disengage drilling rod；Work as down-the-hole
Rig is stepped back along guide rail, manually loads second drilling rod, and installs coupling sleeve in second drilling rod front end, passes through down-the-hole drill
Second drilling rod low speed is delivered into first drilling rod afterbody, is coupled after the alignment of direction integral.Each extension drill rod, by above-mentioned
Extension bar method is carried out.
To ensure that down-the-hole drill is worked continuously, scene is equipped with two drill bits.
When drilling drilling to completion, drilling rod pore-forming borehole cleaning is moved back.
（2）Send pipe
Borehole cleaning need to insert steel pipe in hole after terminating, steel pipe uses Φ 108mm hot rolled seamless steel tubes, can concentrate on machining area and add
Work, scene is transported to using dump truck or platform trailer, unloaded with crane in stake machine side, by piling sequencing and stake it is supporting
It is required that stacking, and pay attention to direction.Crane is lifted by crane steel pipe and lifted by crane using some colligations, waits that hanging stake position carries out pitching pile, borehole cleaning terminates
Immediately using crane insertion steel pipe, steel pipe exposes outside trench bottom 30cm, to connect Grouting Pipe.
（3）Steel pipe spreading
To dock steel pipe, when the first segment pipe in every hole is set, 3m and 4.5m steel pipe is used in odd, even hole respectively, is often saved later
Use long 4.5m steel pipes.First previous steel pipe is headed into the hole being drilled during steel pipe spreading, is coupled using inner sleeve.When previous
In root steel pipe advancement holes, outside hole during remaining 30-40cm, later section steel pipe is manually loaded onto, hand fit's crane is by later section steel pipe
It is bound up on inner sleeve, is joined together two section steel pipes using long 15cm screw thread.
（4）Mixing dual slurry
Dual slurry is made up of cement mortar and waterglass, wherein slip casting when cement mortar and waterglass volume ratio be 1:1, its reclaimed water
The ratio of mud of mud is 0.6:1, cement mortar carries out mixing using mortar mixer, the good cement mortar of mixing is put into the 1m of steel
In × 1m × 1m ash-pits, waterglass is put into another ash-pit.The slip casting that Grouting Pipe is directly connected to steel-pipe pile by slip casting machine links
On steel pipe, interface is connected using silk mouth, and Grouting Pipe is conveyed using rubber tube；
（5）Slip casting
Before slip casting, grouting equipment and material should be checked comprehensively, including Double-liquid mud-injection pump, mix slurry storage slurry system, high pressure madjack pipe, pressure
Power table etc., and with clear water pump testing.After being drilled into designing pile length, tripping in steel pipe, is irrigated with Double-liquid mud-injection pump into steel pipe immediately
Dual slurry, untill filling, to prevent collapse hole using the pipe-slip casting continuous productive process that drills-send.
Slip casting should first carry out slip casting field test, and single hole grouting amount is determined according to actual conditions.It is nonvoluntary after formal slip casting
Interrupt, make every effort to work continuously, to ensure grouting quality.Because once grouting is difficult to reach the full requirement of slurries, in order to ensure slip casting
Quality and effect, carry out in two times during slip casting, 2 hours after once grouting, after first time injects slurries initial set, carry out secondary pressure
Power slip casting.Slip casting uses cement mortar with waterglass volume ratio for 1:The ratio of mud of 1 dual slurry, wherein cement mortar is 0.6：1, i.e.,
The volume ratio of cement mortar and waterglass is 1 when being irrigated with Double-liquid mud-injection pump:1, grouting pressure 0.2MPa, grouting pump need to install pressure
Power table, pressure gage measuring range 0-1.0Mpa, after slip casting wouldn't tube drawing, untill cement mortar flows out outside pipe, extract Grouting Pipe
Sealed steel pipe end.
One kind of embodiment described above, simply more preferably embodiment of the invention, those skilled in the art
The usual variations and alternatives that member is carried out in the range of technical solution of the present invention should all include within the scope of the present invention.
Claims (3)
- A kind of 1. miniature steel pipe isolation pile reinforced construction method, it is characterised in that：Comprise the following steps：（1）Drill hole of drilling machine：Drilled using down-the-hole drill, dry collector is installed on down-the-hole drill additional, when down-the-hole drill works The tight cover down-the-hole drill aperture of dust hood of dry collector, first, after down-the-hole drill is fixed in place by guide pipe design attitude, edge Guide pipe applies brill, and drilling diameter 130mm, down-the-hole drill, which gently forces down, before 1.0m is crept into turns, and normal drilling rate is transferred to after creeping into 1.0m, Two row hole drillings are set between tunneling and existing building, the adjacent spacing of wells is 0.5m, and drilling array pitch is 1.0m, is used 1 is applied to drill every 2 jump stake sequence construction, it is 3m that the drilling rod of down-the-hole drill, which often saves length, extension bar in boring procedure, extension bar it is specific Method is as follows：First segment drilling rod pierces rock-soil layer, stops drilling during afterbody residue 20-30cm, manually uses pipe wrench clamping drilling rod, Then down-the-hole drill low speed and reverse, drilling rod is disengaged；When down-the-hole drill is stepped back along guide rail, manually load second drilling rod, second Drilling rod front end installs coupling sleeve, and second drilling rod low speed is delivered into first drilling rod afterbody, direction pair by down-the-hole drill It is coupled integral, each extension drill rod after standard, by the progress of above-mentioned extension bar method, last down-the-hole drill drilling to completion, moves back Drilling rod pore-forming borehole cleaning；（2）Send pipe：Borehole cleaning terminate after immediately using crane insertion steel pipe, steel pipe uses Φ 108mm hot rolled seamless steel tubes, outside steel pipe Expose trench bottom 30cm, to connect Grouting Pipe；（3）Steel pipe spreading：To dock steel pipe, when the first segment pipe in every hole is set, 3m and 4.5m steel is used in odd, even hole respectively Pipe, often saves and uses long 4.5m steel pipes later, first heads into previous steel pipe in the hole being drilled during steel pipe spreading, using inner sleeve It is coupled, when in previous steel pipe advancement holes, outside hole during remaining 30-40cm, hand fit's crane loads onto later section steel pipe, manually Later section steel pipe is bound up on inner sleeve, joined together two section steel pipes using long 15cm screw thread；（4）Mixing dual slurry：Dual slurry is made up of cement mortar and waterglass, wherein slip casting when cement mortar and waterglass volume Than for 1:1, the wherein ratio of mud of cement mortar is 0.6:1, cement mortar carries out mixing using mortar mixer, the good cement of mixing Slurry is put into 1m × 1m × 1m ash-pits of steel, and waterglass is put into another ash-pit, and Grouting Pipe is directly connected to steel by slip casting machine On the slip casting link steel pipe of pile tube, interface is connected using silk mouth, and Grouting Pipe is conveyed using rubber tube；（5）Slip casting：Dual slurry is irrigated into steel pipe with Double-liquid mud-injection pump, and the volume ratio of cement mortar and waterglass is 1 during perfusion:1, Grouting pressure is 0.2MPa, carries out in two times during slip casting, 2 hours after first time slip casting, after slurries initial set, carries out secondary pressure Slip casting, untill filling, after slip casting wouldn't tube drawing, untill cement mortar flows out outside pipe, extract Grouting Pipe sealed steel pipe End.
- 2. miniature steel pipe isolation pile reinforced construction method according to claim 1, it is characterised in that：In step（1）In, dive Drilling machine scene is equipped with two drill bits.
- 3. miniature steel pipe isolation pile reinforced construction method according to claim 1, it is characterised in that：In step（2）In, adopt Lifted by crane with during crane insertion steel pipe lifting steel pipe using some colligations.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710799540.4A CN107604903A (en) | 2017-09-07 | 2017-09-07 | A kind of miniature steel pipe isolation pile reinforced construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710799540.4A CN107604903A (en) | 2017-09-07 | 2017-09-07 | A kind of miniature steel pipe isolation pile reinforced construction method |
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| CN107604903A true CN107604903A (en) | 2018-01-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677924A (en) * | 2018-07-13 | 2018-10-19 | 武汉市市政建设集团有限公司 | Double miniature steel pipe pile slip casting is at wall partition-type structures and method |
| CN110219666A (en) * | 2019-06-10 | 2019-09-10 | 中交隧道工程局有限公司 | Method for tunnel construction and loess tunnel |
| CN113529830A (en) * | 2021-07-05 | 2021-10-22 | 山东建筑大学 | Shallow tunnel adjacent building isolation-underpinning combined reinforcement structure and construction process thereof |
| CN113585319A (en) * | 2021-08-30 | 2021-11-02 | 中庆建设有限责任公司 | Pile foundation construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677924A (en) * | 2018-07-13 | 2018-10-19 | 武汉市市政建设集团有限公司 | Double miniature steel pipe pile slip casting is at wall partition-type structures and method |
| CN110219666A (en) * | 2019-06-10 | 2019-09-10 | 中交隧道工程局有限公司 | Method for tunnel construction and loess tunnel |
| CN113529830A (en) * | 2021-07-05 | 2021-10-22 | 山东建筑大学 | Shallow tunnel adjacent building isolation-underpinning combined reinforcement structure and construction process thereof |
| CN113585319A (en) * | 2021-08-30 | 2021-11-02 | 中庆建设有限责任公司 | Pile foundation construction method |
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Application publication date: 20180119 |