CN108914927A - The miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope - Google Patents
The miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope Download PDFInfo
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- CN108914927A CN108914927A CN201810852127.4A CN201810852127A CN108914927A CN 108914927 A CN108914927 A CN 108914927A CN 201810852127 A CN201810852127 A CN 201810852127A CN 108914927 A CN108914927 A CN 108914927A
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- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- 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
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention provides a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope, belongs to route base slope construction technical field.Including：1) construction lofting：The plan-position of miniature steel pipe pile is accurately released according to the miniature pile group of design；2) it drills：Air hose and drilling rod are connected together, start to creep into after starting drilling machine and air hose, until reaching requirement hole depth；3) borehole cleaning：Borehole cleaning is carried out simultaneously in drill hole of drilling machine；4) steel pipe inserting piling：Steel floral tube inserting piling is entered into hole after pore-forming；5) slip casting：Grouting Pipe insertion steel pipe is started into slip casting；6) second pulp feeding：It is carried out mending slurry in pile pipe with cement slurry, so that aperture position is reached slurry full；7) mini pile crown beam is constructed：Crown beam connection is carried out to mini pile clump of piles head using armored concrete, lower layer's lengthways main steel bar and protrudes into steel pipe bilateral firm welding in crown beam in crown beam.Construction method of the present invention is easy to operate, and suitable for the narrow zone that place is limited, equipment needed for constructing is few, and mechanical arrangements are flexible, remarkable benefit.
Description
Technical field
The invention belongs to roadbed side slope technical field of construction, specially a kind of existing line base insuring highway' slope miniature steel pipe pile
Reinforced construction method.
Background technique
Landslide is a kind of common geological disaster, it often suspends traffic, and blocks river, destroys factories and miness, destroy village and
Farmland, to cause the heavy losses of life, property, therefore, the prevention and cure project in relation to coming down is that common people are of interest always.To cunning
The slope Controlling research comparative maturity and method for having carried out a large amount of engineering practices has：Friction pile, prestressed anchor rope beam etc., but adopt
It is huge with capital investment when these method harnessing landslides.Over year, with the fast development and science and technology in the fields such as material, machinery
Progress is gradually intended to Composite, miniaturization, lightness and mechanization to reinforcing landslide-mass measure, reinforced earth, soil nail,
The measures such as mini pile, framed anchor are widely used in landslide control, and effect is more obvious.
In various slope problems, the subgrade and pavement problem that disease slope rainy season speedily carries out rescue work with Landslide Deformation initiation, because of work
Phase is tight, construction site is limited, often becomes and administers difficult point, how to integrate using various technical measures, quickly and efficiently to landslide
Body carries out improvement reinforcing, becomes the key to solve the problem.
Summary of the invention
It is an object of the invention to existing landslide control there are aiming at the problem that, a kind of existing line base insuring highway' slope is provided
Miniature steel pipe pile reinforced construction method, construction method of the present invention can control slope soil rapidly and efficiently wriggle, ensure that iron
The safety of road Business Line, construction benefit are significant.
The object of the invention is achieved through the following technical solutions：
A kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope, includes the following steps：
1) construction lofting：Miniature pile group is designed according to geological drilling and on-site actual situations before construction, and is accurately released
The plan-position of miniature steel pipe pile, marks simultaneously；
2) it drills：By drilling-machine shifter to designated position, prepare the drilling rod to match with hole depth, air hose and drilling rod connecting are one
It rises, starts drilling machine and air hose, start to creep into, one run of steel of every depth, drilling rod of spreading, until reaching requirement hole depth；
3) borehole cleaning：During drill hole of drilling machine simultaneously carry out borehole cleaning, with guarantee drilling go on smoothly in pore-forming metapore
Clean no-sundries；
4) steel pipe inserting piling：Steel floral tube inserting piling is entered into hole after pore-forming, if encountering blocking or the hard soil body during down tube, can be used
Piling machine steps up steel floral tube tail portion, slowly squeezes into steel floral tube to bottom hole；
5) slip casting：Grouting Pipe insertion steel pipe is started into slip casting, after slip casting wouldn't tube drawing, until cement slurry flows out outside pipe,
Extract Grouting Pipe；
6) second pulp feeding：After slip casting, due to slurry solidification shrinkage and precipitating, carried out mending slurry in pile pipe in time with cement slurry,
Aperture position is set to reach slurry full；
7) mini pile crown beam is constructed：Crown beam connection, lower layer in crown beam are carried out to mini pile clump of piles head using armored concrete
Lengthways main steel bar and steel pipe bilateral firm welding in crown beam is protruded into, the reinforcing of existing line base side slope miniature steel pipe pile can be realized.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment is additionally provided with existing line preparation of construction before the construction lofting, including：
1. carrying out communication and coordination with existing line relevant unit respectively, guarantee construction and railway operation safety；
2. connection mechanical equipment, personnel show up, detailed inspection, debugging and security risk are carried out to mechanical equipment；
3. guaranteeing engineering power demand, leasing high-power generator and buying matching transformer and electric wire, connection is worked as in time
Ground power supply bureau is laid with power circuit for building site.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment, in step 1), the miniature pile group can be multiple tracks, and the miniature pile group of per pass is made of 3~4 row's miniature steel pipe piles, micro-
Fashioned iron tubular pole spacing 0.5m, quincuncial arrangement.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment, in step 2), the drilling uses hidden hole drilling drilling machine pore-forming, it should be noted that the verticality of control hole, inclines in boring procedure
Gradient is not greater than 1%, and when drilling answers hand fit to clear up boring mud in time, flows back in hole in order to avoid accumulation is excessively high.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment in step 4), when miniature steel pipe pile uses steel pipe spreading, is welded to connect using casing and lengthens steel pipe；In sleeve week
Side welding, needs test weld, face of weld is smooth, and weld seam is full, and checks the verticality of steel pipe before welding.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment in step 5), is additionally added the triethanolamine and 0.2% of cement weight 0.1% in the cement slurry that the slip casting uses
Salt, strength of cement grout need to reach 20MPa, and the ratio of mud controls fullness coefficient >=1.3 between 0.4~0.45；The Grouting Pipe
Be inserted into steel pipe depth be away from 0.2~0.5m of bottom hole at；The Grouting Pipe connects slip casting machine, and the grouting pressure of slip casting machine is 0.2~
0.5MPa。
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment, in step 7), the miniature steel pipe pile protrudes into crown beam no less than the 1/2 of crown beam height；φ built in the crown beam
22mm longitudinal reinforcement, stirrup use the production of φ 12mm stirrup, spacing 20cm.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment also adds a placing of reinforcement agent on crack resistance of concrete sliding pile after the mini pile crown beam construction, carries out permanent reinforcement to roadbed side slope,
Including:
1. steel sheet pile is set：It is excavated between stake before baffle installation in friction pile, elder generation is before the stake back of friction pile, stake and shelves are native
The behind of plate is reinforced with steel sheet pile；
2. antiskid pile driving construction：
A, using Artificial Excavation Slide-resistance Piles basis, and use reinforced concrete core-tube, hoist engine promotion slags tap, wherein stake holes divide
Section excavates, and digs one section of a section supporting, and dado template is composed using steel form, rigid pipe support bracing reinforcement；
B, the preprocessing of pile body reinforcing bar forms, and is transported in on-site hoisting hole and binds, and lap joint is staggered, hole inner concrete
It pours, cleans out surface dust residue in hole before pouring, wetting of sprinkling water on breast wall concrete face.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment, for step 2. in a, the merogenesis height of the retaining wall is 1.0m；The retaining wall use armored concrete, retaining wall thickness 0.3m,
The near coal-mine setting steel reinforced concrete fore shaft of foundation pit, fore shaft 0.2m above ground level, thick 0.3m.
One as a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is specific
Embodiment, 2. in b, the pile concrete slump control is poured, internal vibration step in 80~120mm using tumbling barrel
Stick vibrates secret room, after pile concrete is constructed, more than ground is wound using plastic film, health of sprinkling water, until concrete reaches
To design strength.
The concrete principle of the miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope of the present invention is：
Miniature steel pipe pile of the present invention utilizes the stiffness and strength of itself, can prevent the downslide of creepage body, plays well
AsA -GSH cycle；Meanwhile miniature steel pipe pile group and grouting and reinforcing can make stake week and inter-pile soil form entirety, based on rubbing between stake soil
The reasons such as wiping, cohesive strength increase soil body shear resistance, play consolidation effect.
Compared with prior art, the invention has the advantages that：
1, in construction method of the present invention, miniature steel pipe pile uses down-the-hole drill hole, and excavator cooperation lifting down tube (sets steel
Floral tube) and grouting and reinforcing construction technology, realize rapid construction.
2, it in construction method of the present invention, is drilled using hidden hole drilling, side slope creepage body is nearly free from additional force, effectively subtracts
The influence to slip mass is lacked, temperature pier slip mass effect is obvious.
3, construction method of the present invention is easy to operate, and the requirement to place is low, influences small, to be limited suitable for place stenosis area
Domain.
4, construction equipment needed for construction method of the present invention is few, and mechanical arrangements are flexible, and construction benefit is significant.
Detailed description of the invention
Fig. 1 is the floor plan of miniature steel pipe pile group in embodiment 1.
Appended drawing reference 1- miniature steel pipe pile.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
The Putian Area of in September, 2016 successively welcomes " Mo Landi " (four days accumulated rainfall 124.3mm of typhoon influence, odd-numbered day
Maximum rainfall reach 70.1mm), " catfish " (four days accumulated rainfall 201.6mm of typhoon influence, odd-numbered day maximum rainfall reach
157.6mm) Super Typhoon twice.Typhoon bring continues heavy rainfall, causes to Pu's railway Pu's line K512+411~K512+ forever
The full water of 642 sections of roadbed (cohesive soil cutting) slope soils, intensity drastically reduce, 29 at 9 points on evenings of cut-off September, and K512+411~+
The disasters such as mountain body cracking, drop, slump occur for 642 sections of cut slopes, jeopardize railway operation safety.
After disaster occurs, Railway Bureau's rescue deployment in applicant's active response Nanchang puts into large number of equipment, and personnel carry out
It speedily carries out rescue work, and is directed to the lasting sliding deformation of slip mass, jeopardize railway line security problems, carry out research of technique, have developed " both
Wired roadbed side slope water hazard prediction reinforcement technique " new results, and use the application existing line base insuring highway' slope miniature steel pipe
Stake reinforced construction method reinforces the roadbed side slope to come down, and Specific construction process is as follows：
1, both wired preparations of construction
(1) communication and coordination, setting protection are carried out with units such as owner, track division, station, power-feed section, Train Depts in time respectively
Member and security official are managed scene, station setting liaison man in station, and full-time security protection person, route two sides are arranged in line-to-line
Enclosing is carried out, guarantees construction and railway operation safety.
(2) connection mechanical equipment, personnel show up, and carry out detailed inspection, debugging and security risk to mechanical equipment, right
Construction personnel carries out both wired construction safety trainings, normative operation.
(3), to guarantee engineering power demand, leasing high-power generator and buying matching transformer and electric wire, contact in time
Local power supply bureau is laid with power circuit for building site.
2, construction lofting
It is accurate to release miniature steel pipe pile plan-position according to geological drilling and on-site actual situations before construction, it carries out simultaneously
Mark.Wherein, miniature pile group can be multiple tracks, and the miniature pile group of per pass is made of 3~4 row's mini piles, stake spacing (adjacent miniature steel
Tubular pole spacing) 0.5m, quincuncial arrangement.The horizontal layout of miniature pile group is as shown in Figure 1.
3, it drills
Using hidden hole drilling drilling machine pore-forming, hidden hole drilling is moved to designated position, prepares the drilling rod to match with hole depth, air hose
It is connected together with drilling rod, starts drilling machine and air hose, start to creep into；One run of steel of every depth, drilling rod of spreading, until reaching
To requiring hole depth.It answers hand fit to clear up boring mud in time when drilling, is flowed back in hole in order to avoid accumulation is excessively high.
Notice that the verticality of control hole, gradient are not greater than 1% in boring procedure.Steel pipe is carried out after drilling in time
Stake inserting piling, in order to avoid there is collapse hole.
4, borehole cleaning
It is equipped with air compressor machine in hidden hole drilling boring procedure and carries out conveying compressed air borehole cleaning, to guarantee going on smoothly for drilling
With cleaning in pore-forming metapore without sundries such as boring mud, mud.
5, steel pipe inserting piling
Steel floral tube inserting piling is entered hole using hand fit's excavator in time after pore-forming, such as down tube mistake by steel pipe inserting piling, that is, down tube
Blocking or the hard soil body are encountered in journey, can be stepped up steel floral tube tail portion with piling machine, slowly be squeezed into steel floral tube to bottom hole.
When miniature steel pipe pile uses steel pipe (6m/ root, Φ 114mm, thick 4mm) spreading, scene uses long 50cm/ root, Φ
127mm casing, which is welded to connect, lengthens steel pipe, welds in perimeter of sleeve, answers test weld before welding, and face of weld is answered smooth, and weld seam should satisfy
It is full, and should check the verticality of steel pipe.
6, slip casting
Scene carries out slurry mixing using blender according to cement slurry match ratio, is additionally added cement weight in cement slurry
0.1% triethanolamine and 0.2% salt, to improve the property infused of cement slurry and the early strength of reinforcing body.
Grouting Pipe is inserted into steel pipe when slip casting, is goed deep at away from 0.2~0.5m of bottom hole, Grouting Pipe connects slip casting machine, slip casting machine
Pressure gauge need to be installed, grouting pressure is 0.2~0.5MPa, and strength of cement grout requires to reach 20MPa, and the ratio of mud is strict controlled in
Between 0.4~0.45, fullness coefficient >=1.3.After slip casting wouldn't tube drawing close grouting valve until cement slurry flows out outside pipe, pull out
Grouting Pipe out.
Situations such as appearance pressure steeply rises or Grouting Pipe is acutely shaken should stop slip casting immediately, unclamp slurry traversing valve at once
Door, avoids spillage, booster.
7, second pulp feeding
After slip casting, due to slurry solidification shrinkage and precipitating, carries out mending in pile pipe in time using the cement slurry of same match ratio and starch,
Aperture position is set to reach slurry full.
8, mini pile crown beam is constructed
According to on-site actual situations, mini pile clump of piles head is connected using C30 armored concrete crown beam.The size of crown beam according to
Depending on scene needs, lower layer's lengthways main steel bar protrudes into many in crown beam with steel pipe bilateral firm welding in crown beam, stake is protruded into crown beam
In the 1/2 of crown beam height；φ 22mm longitudinal reinforcement (HRB400 grades) built in crown beam, stirrup use φ 12mmHPB300 stirrup system
Make, spacing 20cm.
In place miriness, concrete crown beam constructional difficulties, settable twice φ 20mm reinforcing bar connection net will be all adjacent
Mini pile two-by-two bilateral be weldingly connected, road 30~40cm of spacing, with temporary substitution be preced with beam action, increase pile group globality and
Rigidity, general steel-pipe pile basset about 50cm.
In order to ensure the stability of above-mentioned existing line miniature steel pipe pile, a placing of reinforcement is also added after the construction of mini pile crown beam
Agent on crack resistance of concrete sliding pile carries out permanent reinforcement to roadbed side slope, and concrete operations are as follows：
1, steel sheet pile is set
Satisfying in the segment table layer soil body of K512+411~642, water, shearing strength are low, and excavation of foundation pit, which easily slips, to collapse, this section of friction pile is opened
Between digging stake before baffle installation, first before the stake back of friction pile, stake and the behind steel sheet pile (model of breast boards：FSP-IV has
Imitate breadth 0.4m) it reinforces, the long 9m of stake.
2, antiskid pile driving construction
1) antiskid pile foundation uses hand excavation, reinforced concrete core-tube, and hoist engine promotion is slagged tap.Breast wall concrete uses
Small-sized mixing station stirs perfusion on the spot, and dado template is composed using steel form, steel pipe frame bracing reinforcement.Stake holes merogenesis is opened
It digs, retaining wall merogenesis height 1.0m.Dig one section of section supporting immediately.Retaining wall uses C20 armored concrete, retaining wall thickness 0.3m, foundation pit
Near coal-mine setting C20 steel reinforced concrete fore shaft, fore shaft 0.2m above ground level, thick 0.3m.
2) pile body reinforcing bar is transported in on-site hoisting hole and binds, lap joint is staggered, in hole in processing space machine-shaping
Concreting cleans out surface dust residue etc. in hole before pouring, and sprinkles water on breast wall concrete face wet.Pile concrete collapses
Degree of falling is controlled in 80~120mm, is poured using tumbling barrel, internal vibration stick vibration compacting.After pile concrete is constructed, ground
It more than face is wound using plastic film, health of sprinkling water, until concrete reaches design strength.
The benefit that the present embodiment obtains is as follows：
1, economic benefit：The present embodiment construction method it is pressed for time, narrow space, it is muddy when, using down-the-hole
Drilling machine pilot hole, the excavator cooperation lifting construction technologies such as down tube (setting steel floral tube) and grouting and reinforcing, controlling rapidly and efficiently
The further sliding of side slope creepage body, ensure that both wired operation securities, 1,050,000 yuan of save the cost.
2, environmental benefit：In the miniature steel pipe pile reinforced construction method actual mechanical process of the present embodiment, strictly wanted by owner
It asks, standardized construction, builds gutter in time and drained, rubbish centralized processing avoids nearby river water contamination and rubbish
Pollution, achieves good environmental benefit.
3, energy-saving benefit：Mechanical and personnel are more in the present embodiment construction method practical operation, reasonable at applicant scene
It arranges and organizes down, greatly improves mechanical execution efficiency, reduce artificial utilization rate, saved personnel and mechanical input amount,
And ensure that construction safety to greatest extent, there is certain energy-saving effect.
4, social benefit：The Putian Area of in September, 2016 is by " Mo Landi ", and " catfish " Super Typhoon continuously influences twice, makes
The disasters such as mountain body cracking, drop, slump occur at K512+411~+642 sections of cut slope of Pu's line forever, threaten traffic safety.Shen
It asks someone to repair base side slope using the miniature steel pipe pile reinforced construction method of the present invention, realizes the just normally opened of route in advance
It is logical；It ensure that both wired operation security and passenger traffic, the normal transport of shipping, achieve good social benefit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope, which is characterized in that include the following steps：
1) construction lofting：Miniature pile group is designed according to geological drilling and on-site actual situations before construction, and is accurately released miniature
The plan-position of steel-pipe pile, marks simultaneously；
2) it drills：By drilling-machine shifter to designated position, prepare the drilling rod to match with hole depth, air hose is connected together with drilling rod, opens
Dynamic drilling machine and air hose, start to creep into, one run of steel of every depth, drilling rod of spreading, until reaching requirement hole depth；
3) borehole cleaning：Borehole cleaning is carried out simultaneously during drill hole of drilling machine, to guarantee that going on smoothly for drilling is cleaned in pore-forming metapore
No-sundries；
4) steel pipe inserting piling：Steel floral tube inserting piling is entered into hole after pore-forming, if encountering blocking or the hard soil body during down tube, piling can be used
Machine steps up steel floral tube tail portion, slowly squeezes into steel floral tube to bottom hole；
5) slip casting：Grouting Pipe insertion steel pipe is started into slip casting, after slip casting wouldn't tube drawing extracted until cement slurry flows out outside pipe
Grouting Pipe；
6) second pulp feeding：After slip casting, due to slurry solidification shrinkage and precipitating, is carried out mending slurry in pile pipe in time with cement slurry, make hole
It is full that mouth position reaches slurry；
7) mini pile crown beam is constructed：Crown beam connection is carried out to mini pile clump of piles head using armored concrete, lower layer is longitudinal in crown beam
Main reinforcement and steel pipe bilateral firm welding in crown beam is protruded into, the reinforcing of existing line base side slope miniature steel pipe pile can be realized.
2. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
Existing line preparation of construction is additionally provided with before the construction lofting, including：
1. carrying out communication and coordination with existing line relevant unit respectively, guarantee construction and railway operation safety；
2. connection mechanical equipment, personnel show up, detailed inspection, debugging and security risk are carried out to mechanical equipment；
3. guaranteeing engineering power demand, leasing high-power generator and buying matching transformer and electric wire, connection in time is local to be supplied
Electric office is laid with power circuit for building site.
3. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
In step 1), the miniature pile group can be multiple tracks, and the miniature pile group of per pass is made of 3~4 row's miniature steel pipe piles, miniature steel pipe pile
Spacing 0.5m, quincuncial arrangement.
4. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
In step 2), the drilling uses hidden hole drilling drilling machine pore-forming, should be noted that the verticality of control hole in boring procedure, gradient must not
Greater than 1%, when drilling, answers hand fit to clear up boring mud in time, flows back in hole in order to avoid accumulation is excessively high.
5. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
In step 4), when miniature steel pipe pile uses steel pipe spreading, it is welded to connect using casing and lengthens steel pipe；It is welded in perimeter of sleeve,
Test weld is needed before welding, face of weld is smooth, and weld seam is full, and checks the verticality of steel pipe.
6. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
In step 5), the triethanolamine of cement weight 0.1% and 0.2% salt, water are additionally added in the cement slurry that the slip casting uses
Mud intensity need to reach 20MPa, and the ratio of mud controls fullness coefficient >=1.3 between 0.4~0.45；The Grouting Pipe is inserted into steel
Pipe depth be away from 0.2~0.5m of bottom hole at；The Grouting Pipe connects slip casting machine, and the grouting pressure of slip casting machine is 0.2~0.5MPa.
7. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
In step 7), the miniature steel pipe pile, which protrudes into, is no less than the 1/2 of crown beam height in crown beam；The longitudinal direction φ 22mm steel built in the crown beam
Muscle, stirrup use the production of φ 12mm stirrup, spacing 20cm.
8. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as described in claim 1, which is characterized in that
A placing of reinforcement agent on crack resistance of concrete sliding pile is also added after the mini pile crown beam construction, permanent reinforcement is carried out to roadbed side slope, including:
1. steel sheet pile is set：Between friction pile is excavated stake before baffle installation, first before the stake back of friction pile, stake and shelves soil plate
It is reinforced behind with steel sheet pile；
2. antiskid pile driving construction：
A, using Artificial Excavation Slide-resistance Piles basis, and use reinforced concrete core-tube, hoist engine promoted slags tap, wherein stake holes merogenesis is opened
It digs, digs one section of a section supporting, dado template is composed using steel form, rigid pipe support bracing reinforcement；
B, the preprocessing of pile body reinforcing bar forms, and is transported in on-site hoisting hole and binds, and lap joint is staggered, and hole inner concrete pours
It builds, cleans out surface dust residue in hole before pouring, wetting of sprinkling water on breast wall concrete face.
9. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as claimed in claim 8, which is characterized in that
For step 2. in a, the merogenesis height of the retaining wall is 1.0m；The retaining wall uses armored concrete, and retaining wall thickness 0.3m, foundation pit is near coal-mine
Steel reinforced concrete fore shaft, fore shaft 0.2m above ground level, thick 0.3m are set.
10. a kind of miniature steel pipe pile reinforced construction method of existing line base insuring highway' slope as claimed in claim 8, feature exist
In step is 2. in b, and the pile concrete slump control is poured in 80~120mm using tumbling barrel, the vibration of internal vibration stick
Puddling room after pile concrete is constructed, more than ground is wound using plastic film, and health of sprinkling water is set until concrete reaches
Count intensity.
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| CN109972646A (en) * | 2019-05-20 | 2019-07-05 | 古清 | Existing railway line line-to-line pile foundation builds mechanical equipment and pile foundation construction method |
| CN110004946A (en) * | 2019-03-27 | 2019-07-12 | 河海大学 | The pile top and its soil-slope rapid rescue ruggedized construction, construction method of grouting behind shaft or drift lining miniature steel pipe pile |
| CN110344394A (en) * | 2019-06-24 | 2019-10-18 | 中建铁路投资建设集团有限公司 | A kind of surrounding deep foundation pit shallow embedding structure base ruggedized construction and construction method |
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| CN114508119A (en) * | 2022-03-29 | 2022-05-17 | 中铁一局集团有限公司 | Mountain slope protection construction structure and construction method based on miniature steel pipe piles |
| CN114808943A (en) * | 2022-04-07 | 2022-07-29 | 山东省公路桥梁建设集团有限公司 | Grouting construction process for micro steel pipe |
| CN115370187A (en) * | 2022-09-14 | 2022-11-22 | 中铁十局集团有限公司 | Method for reinforcing railway contact net stand column in soft soil layer |
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Application publication date: 20181130 |