CN110106869A - A kind of construction method of neighbouring Business Line crushed stone grouting pile - Google Patents
A kind of construction method of neighbouring Business Line crushed stone grouting pile Download PDFInfo
- Publication number
- CN110106869A CN110106869A CN201910330878.4A CN201910330878A CN110106869A CN 110106869 A CN110106869 A CN 110106869A CN 201910330878 A CN201910330878 A CN 201910330878A CN 110106869 A CN110106869 A CN 110106869A
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- Prior art keywords
- drilling
- pile
- grouting pipe
- construction method
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Abstract
The invention discloses a kind of construction methods of neighbouring Business Line crushed stone grouting pile, it is constructed using long-spiral drilling machine, and improve slip casing by pressure technique, it solves in traditional crushed stone grouting pile work progress and periphery roadbed is disturbed greatly, there are problems that differential settlement, there are the security risks such as collapse hole, construction method of the invention is small due to the disturbance to periphery roadbed, improve integral construction efficiency and safety coefficient, it is broadening to have achieved the purpose that roadbed side is built, ensure the stabilization and globality of structure, the durability for improving roadbed meets new route design requirement.The needs for meeting place connection and reasonable arrangement well simultaneously, reduce Business Line safety index, greatly improve construction efficiency, save construction cost.
Description
Technical field
The invention belongs to high-speed railway subgrade technical field of construction, and in particular to a kind of neighbouring Business Line crushed stone grouting pile
Construction method.
Background technique
With the fast development that high-speed rail is built, part new route need to be using existing route or to existing Business Line
Carry out side build it is broadening, to meet transportation demand.
As high-speed rail technology in recent years is changed rapidly and perfect, part existing line cannot be very in transport capacity
Good meets current transportation ability,, should when carrying out helping to build broadening operation to existing roadbed especially within the scope of neighbouring Business Line
Consider that construction method is small to Business Line ground and the disturbance of Business Line roadbed, surface subsidence is controlled, with small vibration in construction, noise
It is low, it is comparatively safe, while newly-built roadbed also needs to meet the requirement of the bearing capacity of current rail.
Normal circulation slewing drilling machine hole is used when traditional gravel slip-casting pile driving construction, if geologic condition is poor in work progress, easily
Disturbance and differential settlement are caused to periphery roadbed, and if after pore-forming cannot perfusion pressure slurry in time, existing may collapse hole etc.
Hidden danger can make the differential settlement of roadbed generation around, seriously jeopardize operation security.
Summary of the invention
Based on this, the present invention provides a kind of construction methods of neighbouring Business Line crushed stone grouting pile, using long-spiral drilling machine
It constructs, and improves slip casing by pressure technique, solve in traditional crushed stone grouting pile work progress and periphery roadbed is disturbed
Greatly, there are problems that differential settlement, there are the security risks such as collapse hole.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of construction method of neighbouring Business Line crushed stone grouting pile, comprising the following steps:
S1, drilling and forming hole: after carrying out drilling and forming hole to projected depth in designated position using long-spiral drilling machine, cleaning eye bottom；
S2, installation Grouting Pipe: Grouting Pipe is inserted into the drilling along the center of drilling；
S3, it fills rubble: being perfused with rubble to the design stake top absolute altitude of the drilling；That is it after Grouting Pipe being installed, first uses
Rubble fills drilling, fills to drilling design stake top absolute altitude, specifically, to infuse incessantly into Grouting Pipe during filling
Enter clear water cleaning drilling；
S4, slip casing by pressure: the prepared cement slurry of injection in Xiang Suoshu Grouting Pipe extracts slip casting upwards in time during slip casting
Pipe is mended into the drilling simultaneously fills out rubble to stake top is designed, and after the cement slurry overflows aperture, stops slip casting, reserves described
Grouting Pipe is in the drilling, and the length for reserving Grouting Pipe here can need to be adjusted according to site operation, in the present invention
In, it is preferred that the Grouting Pipe of 3m can be reserved in drilling；
S5, second pulp feeding: after stopping 30 ~ 60min of slip casting, the cement slurry is re-injected in Xiang Suoshu Grouting Pipe and carries out secondary benefit
After slurry, the Grouting Pipe is extracted；
S6, vibrate pile: after the pile body that vibrates keeps the slurry placement of stake top closely knit, pile.
Further, in step S1, the Specific construction step of the long-spiral drilling machine are as follows: the one of the long-spiral drilling machine
The preloading block of two 2.5t is placed in side side by side, and the preloading block is lived the long-spiral drilling machine anchor by wirerope, using steel wire
Rope draws the long-spiral drilling machine toward the opposite direction of neighbouring Business Line and supply lines.The long-spiral drilling machine used in the present invention
Generally use hydraulic walking mechanism, be not during drilling be completely fixed it is motionless, to avoid constructing
Occur rack offset in journey or topple over, drilling rod rocks, deflection, collapses so as to cause stake holes deflection or drilling machine and jeopardizes Business Line and confession
Electric wire, therefore drilling machine is drawn toward the opposite direction of Business Line and supply lines using wirerope in the present invention, one section of fixation of wirerope
On drilling machine, the other end is lived with preloading block anchor.
Further, in step S1, the projected depth is than required designing pile length depth 30cm.It should know, this
In invention specific restriction is not done to designing pile length, design stake diameter, can be adjusted according to the needs of practice of construction.
Further, in step S1, the specific steps at the cleaning eye bottom are as follows: after being bored into projected depth, the length
The drilling tool of twist bit carries out the clear soil that dallies, and then stops operating and proposes the drilling tool, then by the drilling tool to drilling
Bottom hole be sent into and pile body with material sand and rubble to design stake bottom absolute altitude.
Further, in step S2, the Grouting Pipe is steel Grouting Pipe, and the fitting depth of the steel Grouting Pipe is it
Nozzle is higher than design stake top 75cm, and the gap of tube bottom and drilling designed stake bottom and reserve 30cm, the steel Grouting Pipe is away from pipe
At the 50cm of bottom to the tube wall between tube bottom be flower cellular type tube wall.
Further, in step S2, screwed connection is used between adjacent Grouting Pipe.
It further, further include step S7, detection gravel slip-casting pile bearing capacity after the pile that vibrates.
Further, the specific steps of the step S7 are as follows:
S71, after pile 7 days, according to low strain dynamic check pile body integrity；
S72, after pile 28 days, at pile body center, vertical drilling coring in the long range of stake, observation pile body integrality and uniformly
Property；
S73, after pile 28 days, according to high-speed railway Business Line safety code and specification, by composite foundation carrying test into
Row bearing capacity examination.
Further, in step S71, the frequency of the low strain dynamic inspection is 10%；
In step S72, the frequency of the boring and coring is 2%.
Further, in step S73, the testing result of the bearing capacity examination is greater than design design value, then meets design
It is required that.
Compared with prior art, the invention has the following advantages:
Traditional reverse circulation construction uses wet construction, easily causes borehole collapse and settlement of foundation, and the present invention uses long spiral shell
Rotary drill dry construction, boring aperture is small, and hole wall should not collapse, with small vibration in construction, small to the disturbance of soil and ground, reduces
Traditional is constructed using reverse circulation to sedimentation caused by Business Line roadbed, and high speed railway foundation construction is met.
Slip casing by pressure technique is improved simultaneously, the tube wall of the tube bottom of steel Grouting Pipe up 50cm is made into colored cellular type, together
When by the placement location of Grouting Pipe away from design stake bottom reserve 30cm gap, thus increase injection slurry and rubble contact area and
The injection pressure of injection slurry, enables injection slurry uniformly fully to spread around, and it is preferably solid to reach injection slurry and rubble
Knot, the pile quality of crushed stone grouting pile are good；In addition, being fixed between steel Grouting Pipe using screwed connection, slurry when avoiding slip casting
Let out in vitro and caused by cement slurry and rubble consolidation it is uneven, the intensity after ensure that the pile of crushed stone grouting pile.Using improvement
Slip casing by pressure technique afterwards, it can be ensured that high-speed railway operation bearing capacity is fully achieved in the stability and durability of crushed stone grouting pile
Requirement.
Since the disturbance to periphery roadbed is small, integral construction efficiency and safety coefficient are improved, has reached roadbed side and has built increasing
Wide purpose, it is ensured that the stabilization and globality of structure improve the durability of roadbed, meet new route design requirement.
In addition, being met well by the way that long screw auger slip casing by pressure technology is used for Business Line high-speed rail roadbed basement process
The needs of place connection and reasonable arrangement, reduce Business Line safety index, greatly improve construction efficiency, save construction at
This.
Detailed description of the invention
Fig. 1 is layout drawing of the present invention at neighbouring business high-speed railway subgrade Foundation Treatment scene；
Fig. 2 is the inbuilt structural schematic diagram of Grouting Pipe in drilling in the present invention.
In figure: 1- long-spiral drilling machine, 2-2.5t preloading block, 3- long spiral drilling head, 4- long spire drilling tool, 5- Grouting Pipe, 6-
Flower cellular type tube wall, 7- rubble.
Specific embodiment
To facilitate the understanding of the present invention, below in conjunction with specific embodiments to invention is more fully described.But
It is that the invention can be realized in many different forms, however it is not limited to embodiments described herein.On the contrary, providing
The purpose of these embodiments is to make to make the present disclosure more fully understandable.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
The working principle of the construction method of crushed stone grouting pile of the invention is to be wanted according to designing pile length and stake diameter according to design
It asks and construction drilling and forming hole is carried out to projected depth using long screw auger, behind cleaning eye bottom, Grouting Pipe is installed, is injected into Grouting Pipe
Cement slurry, cement slurry and rubble are combined into small concrete pile without sand, while cement slurry also penetrates into the soil body, soil mass consolidation.
Neighbouring Business Line crushed stone grouting pile designing pile length in the present embodiment is 4 ~ 12m, and design stake diameter is 0.4 ~ 0.6m,
Specific step is as follows for construction method:
S1, drilling and forming hole: according to design requirement, stake position has been measured in advance, long-spiral drilling machine 1 is reached and is bored in designated position
Into pore-forming to projected depth, the arrangement of long-spiral drilling machine 1 as shown in Figure 1, place two in the side of long-spiral drilling machine 1 side by side
The preloading block 2 of 2.5t connects preloading block 2 with long-spiral drilling machine 1 with wirerope, so that 2 anchor of preloading block lives long-spiral drilling machine 1,
The direction opposite toward Business Line and supply lines is drawn, to guarantee that site operation is safely controllable；Then according to design stake diameter requirement, change
Elongated augers 3 carries out drilling and forming hole to projected depth in designated position, in the present embodiment, in order to guarantee designing pile length,
The projected depth of drilling and forming hole is than designing pile length depth 30cm, i.e., every pile outdrill 30cm；After pore-forming, long spire drilling tool 4 is in bottom hole
The clear soil that dallies is carried out, then stops operating and proposes long spire drilling tool 4, completes bottom hole cleaning；Then pass through long spire drilling tool 4 to hole
Bottom be sent into and pile body with material sand and rubble to design stake bottom absolute altitude, it is ensured that stake bottom bearing capacity；
S2, installation Grouting Pipe 5: Grouting Pipe 5 is inserted into the drilling along the center of drilling, the Grouting Pipe in the present embodiment
5 use steel Grouting Pipes, and Grouting Pipe away from tube bottom 50cm to the tube wall at tube bottom be flower cellular type tube wall 6, i.e., on tube wall
Several apertures are opened up, can guarantee that cement slurry that Grouting Pipe 5 is injected and rubble and the soil body of surrounding are uniformly and effectively solid in this way
It strikes up partnership；The fitting depth of Grouting Pipe 5 is the gap that tube bottom reserves 30cm away from bottom hole simultaneously, and nozzle is then higher than design stake top
75cm avoids surrounding soil sundries from blocking Grouting Pipe 5；And in the present embodiment, connected between adjacent Grouting Pipe 5 using screw thread
It connects, can effectively guarantee in filling process in this way, it will not spillage；
S3, it fills rubble: being perfused with rubble to the design stake top absolute altitude of the drilling, it will be incessantly during filling rubble
Into Grouting Pipe, injected clear water cleaning drills, and the rubble in the present embodiment uses the aggregate of the discontinuous gradation of 16~31.5mm；
S4, slip casing by pressure: prepared cement slurry is injected into the Grouting Pipe with grouting pump, grouting pressure control exists
0.25MPa ~ 0.4Mpa during slip casting extracts Grouting Pipe upwards in time and mends simultaneously into the drilling and fills out rubble to designing stake
Top stops slip casting after the cement slurry overflows aperture, reserves Grouting Pipe described in 3m in the drilling；The preparation of cement slurry
It should carry out engineer testing first with the suitable ratio of mud of determination, slurrying, the ash of preparation are then carried out according to test mix-design
Slurry answers good fluidity, does not isolate, and should stir evenly convenient for pumping, mortar, add strainer to be sieved, being used while making.Cement grout is matched
System wants the strict control ratio of mud, and mixing cement slurry must take metering to feed intake, and the match ratio of cement slurry is cement in the present embodiment:
Sand: water=1:1.334:0.53, match ratio here are determined in the practice of construction according to the present embodiment, this implementation is only used for
The citing of example；
S5, second pulp feeding: after stopping 30 ~ 60min of slip casting, the cement slurry is re-injected in Xiang Suoshu Grouting Pipe and carries out secondary benefit
After slurry, the Grouting Pipe is extracted；
S6, vibrate pile: it is vibrated with poker vibrator insertion pile body 1.5m or so, keeps stake top slurry placement closely knit, at
Stake.
S7, according to " high-speed railway subgrade engineering construction quality acceptance criteria " (TB10752-2010) and " railway concrete
Engineering construction quality acceptance criteria " (TB10424-2010) detection gravel slip-casting pile bearing capacity:
After pile 7 days, pile body integrity is checked according to low strain dynamic, checks that frequency is 10%；
After pile 28 days, at pile body center, vertical drilling coring in the long range of stake, pile body integrality and uniformity are observed,
Coring frequency is 2%；
After pile 28 days, according to high-speed railway Business Line safety code and specification, held by composite foundation carrying experiment
Force inspecting is carried, when testing result is greater than design design value, then meets design requirement.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of construction method of neighbouring Business Line crushed stone grouting pile, which comprises the following steps:
S1, drilling and forming hole: after carrying out drilling and forming hole to projected depth in designated position using long-spiral drilling machine, cleaning eye bottom；
S2, installation Grouting Pipe: Grouting Pipe is inserted into the drilling along the center of drilling；
S3, it fills rubble: being perfused with rubble to the design stake top absolute altitude of the drilling；
S4, slip casing by pressure: the prepared cement slurry of injection in Xiang Suoshu Grouting Pipe, during slip casting while into the drilling
Benefit fills out rubble to stake top is designed, and after the cement slurry overflows aperture, stops slip casting, reserves the Grouting Pipe in the drilling
It is interior；
S5, second pulp feeding: after stopping 30 ~ 60min of slip casting, the cement slurry is re-injected in Xiang Suoshu Grouting Pipe and carries out secondary benefit
After slurry, the Grouting Pipe is extracted；
S6, vibrate pile: after the pile body that vibrates keeps the slurry placement of stake top closely knit, pile.
2. construction method as described in claim 1, which is characterized in that in step S1, the Specific construction of the long-spiral drilling machine
Step are as follows: place the preloading block of two 2.5t side by side in the side of the long-spiral drilling machine, the preloading block will by wirerope
The long-spiral drilling machine anchor is lived, using the wirerope direction that the long-spiral drilling machine is opposite toward neighbouring Business Line and supply lines
It draws.
3. construction method as described in claim 1, which is characterized in that in step S1, the projected depth is than required design
The long depth 30cm of stake.
4. construction method as claimed in claim 3, which is characterized in that in step S1, the specific steps at the cleaning eye bottom are as follows:
After being bored into projected depth, the drilling tool of the long-spiral drilling machine carries out the clear soil that dallies, and then stops operating and proposes the drilling tool,
Then stake bottom absolute altitude is extremely designed with the sand and rubble of material to the bottom hole of drilling feeding and pile body by the drilling tool.
5. construction method as described in claim 1, which is characterized in that in step S2, the Grouting Pipe is steel Grouting Pipe, institute
The fitting depth for stating steel Grouting Pipe is that its nozzle is higher than design stake top 75cm, the reserved 30cm in the design stake bottom of tube bottom and drilling
Gap, the steel Grouting Pipe away from tube bottom 50cm to the tube wall between tube bottom be flower cellular type tube wall.
6. construction method as described in claim 1, which is characterized in that in step S2, screw thread is used between adjacent Grouting Pipe
Connection.
7. construction method as claimed in any one of claims 1 to 6, which is characterized in that further include step after the pile that vibrates
Rapid S7, detection gravel slip-casting pile bearing capacity.
8. construction method as claimed in claim 7, which is characterized in that the specific steps of the step S7 are as follows:
S71, after pile 7 days, according to low strain dynamic check pile body integrity；
S72, after pile 28 days, at pile body center, vertical drilling coring in the long range of stake, observation pile body integrality and uniformly
Property；
S73, after pile 28 days, according to high-speed railway Business Line safety code and specification, by composite foundation carrying test into
Row bearing capacity examination.
9. construction method as claimed in claim 8, which is characterized in that in step S71, the frequency of the low strain dynamic inspection is
10%；
In step S72, the frequency of the boring and coring is 2%.
10. construction method as claimed in claim 8, which is characterized in that in step S73, the detection knot of the bearing capacity examination
Fruit is greater than design design value, then meets design requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330878.4A CN110106869A (en) | 2019-04-23 | 2019-04-23 | A kind of construction method of neighbouring Business Line crushed stone grouting pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330878.4A CN110106869A (en) | 2019-04-23 | 2019-04-23 | A kind of construction method of neighbouring Business Line crushed stone grouting pile |
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| CN110106869A true CN110106869A (en) | 2019-08-09 |
Family
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|---|---|---|---|
| CN201910330878.4A Pending CN110106869A (en) | 2019-04-23 | 2019-04-23 | A kind of construction method of neighbouring Business Line crushed stone grouting pile |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243183A (en) * | 1999-06-22 | 2000-02-02 | 北京聚英达岩土技术开发有限责任公司 | Construction method of vibration punching slurry-bitstone pile and apparatus used thereof |
| CN1482307A (en) * | 2002-09-10 | 2004-03-17 | 周同和 | Sand concrete free small pile foundation consolidation process by stone throwing and squeezing |
| CN101736738A (en) * | 2009-12-14 | 2010-06-16 | 王军 | Pressure resistance and pull-out resistance grouted gravel pile |
| CN104711973A (en) * | 2015-01-07 | 2015-06-17 | 朱奎 | Construction method for small-diameter pile composite foundation |
| CN106400854A (en) * | 2016-10-28 | 2017-02-15 | 中国电建集团贵阳勘测设计研究院有限公司 | Embedded structure for detecting pile tip sediment and bearing stratum and detection method |
| CN108677936A (en) * | 2018-06-05 | 2018-10-19 | 邹延辉 | The construction method of bottom pouring mortar pile is rammed in a kind of drilling |
| CN108797578A (en) * | 2018-07-12 | 2018-11-13 | 上海市城市建设设计研究总院（集团）有限公司 | Crushed stone grouting pile and its construction method with classification enlarged footing |
-
2019
- 2019-04-23 CN CN201910330878.4A patent/CN110106869A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243183A (en) * | 1999-06-22 | 2000-02-02 | 北京聚英达岩土技术开发有限责任公司 | Construction method of vibration punching slurry-bitstone pile and apparatus used thereof |
| CN1482307A (en) * | 2002-09-10 | 2004-03-17 | 周同和 | Sand concrete free small pile foundation consolidation process by stone throwing and squeezing |
| CN101736738A (en) * | 2009-12-14 | 2010-06-16 | 王军 | Pressure resistance and pull-out resistance grouted gravel pile |
| CN104711973A (en) * | 2015-01-07 | 2015-06-17 | 朱奎 | Construction method for small-diameter pile composite foundation |
| CN106400854A (en) * | 2016-10-28 | 2017-02-15 | 中国电建集团贵阳勘测设计研究院有限公司 | Embedded structure for detecting pile tip sediment and bearing stratum and detection method |
| CN108677936A (en) * | 2018-06-05 | 2018-10-19 | 邹延辉 | The construction method of bottom pouring mortar pile is rammed in a kind of drilling |
| CN108797578A (en) * | 2018-07-12 | 2018-11-13 | 上海市城市建设设计研究总院（集团）有限公司 | Crushed stone grouting pile and its construction method with classification enlarged footing |
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Application publication date: 20190809 |