CN105822327B - A kind of lateral advanced pre-reinforcing construction method of the small pilot tunnel of tunneling - Google Patents
A kind of lateral advanced pre-reinforcing construction method of the small pilot tunnel of tunneling Download PDFInfo
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- CN105822327B CN105822327B CN201610342203.8A CN201610342203A CN105822327B CN 105822327 B CN105822327 B CN 105822327B CN 201610342203 A CN201610342203 A CN 201610342203A CN 105822327 B CN105822327 B CN 105822327B
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- pilot tunnel
- small pilot
- ductule
- tunneling
- subway station
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Abstract
The present invention discloses a kind of small pilot tunnel of tunneling laterally advanced pre-reinforcing construction method, which is characterized in that described method includes following steps: in the digging process of tunneling subway station, in tunneling subway station, button arch and the delivery position of skirt piles, center pillar dig out small pilot tunnel；Ductule is installed in the small pilot tunnel；Grouting and reinforcing is carried out between the soil layer the small pilot tunnel by the ductule installed.The method of the present invention is using having completed the small pilot tunnel space of preliminary bracing as the working face of pre-reinforcement grouting with small pipe, it can be clamped between small pilot tunnel and complete whole reinforcements between soil layer excavation, for earth excavation process, there are sufficient working faces and working time, it avoids reinforcement operation and excavates conflicting with each other for operation, effectively increase construction efficiency.
Description
Technical field
It is laterally advanced more particularly, to a kind of small pilot tunnel of tunneling the present invention relates to building and technical field of structural engineering
Pre-reinforcing construction method.
Background technique
At present cavern-pile method construction Underground Subway Station construction in, between each small pilot tunnel the holder body soil body excavate it is previous as
Grouting and reinforcing processing is carried out using longitudinal advanced tubule by front, although this construction technology more can significantly improve folder
Main body soil consolidation effect is held, but there are the following problems: first, the setting of longitudinal advanced tubule, slip casting needs and main body soil
Side is excavated to complete in same working face, and two procedures can only alternately, and working efficiency is lower；Second, advanced tubule is completed
After mortar depositing construction, injecting paste material and the reinforcing construction body early strength that ground layer soil body is mixed to form are lower, generally require 12-24h
The Seed harvest of some strength can be just formed with.
Summary of the invention
It is an object of the present invention to provide a kind of lateral advanced pre-reinforcing construction methods of the small pilot tunnel of tunneling.
In order to achieve the above objectives, the present invention adopts the following technical solutions:
A kind of lateral advanced pre-reinforcing construction method of the small pilot tunnel of tunneling, described method includes following steps:
(1) in the digging process of tunneling subway station, in tunneling subway station, button arch and the delivery position of skirt piles, center pillar are dug
Small pilot tunnel out；
(2) ductule is installed in the small pilot tunnel；
(3) grouting and reinforcing is carried out to the soil layer small pilot tunnel by the ductule installed.
Further, small pilot tunnel described in step (1) include be located at tunneling subway station button arch and skirt piles, in
The delivery position of column.
Further, step (2) specifically comprises the following steps:
1) the laying line for laying ductule is determined respectively in the described first small pilot tunnel and the second small pilot tunnel；
2) hole location of laying ductule is determined in the laying line ascender line；
3) it drills in the hole location；
4) ductule is placed in drilling；
5) ductule that the described first small pilot tunnel and the second small pilot tunnel are laid is buckled on arch in the tunneling subway station
Side's overlap joint.
Further, step 1) the laying line intersects one side with the tunneling subway station for the described first small pilot tunnel
Top intersection and the second small pilot tunnel intersect the top intersection of one side with the tunneling subway station.
Further, the hole depth of the step 3) drilling is greater than the length of the ductule, the spacing between the drilling
For 300mm.
Further, the front end of the step 4) ductule is cone-shaped, and grout stop is installed in ductule tail portion；Ductule is long
Degree is 3m, and the diameter of ductule is 32mm, and the angle between the ductule and horizontal plane is 15 degree.
Further, the tube wall surrounding at the front end of the ductule to pipe range 2/3 offers injected hole, the injected hole
Bore dia be 8mm；It is quincunx laying between the injected hole, the spacing between the injected hole is 100*100mm.
Further, overlapped described in step 5), and the minimum lap of splice is 312mm.
Further, the pressure of step (3) described slip casting is 0.3-0.5MPa, and the slurries of the grouting by matching as follows
Group is grouped as, water: lime=1:1.
Beneficial effects of the present invention are as follows:
1, replace traditional per-fore pouring liquid with small pipe reinforcement process, by reinforcement operation and excavate operation working face separation, can protect
The continuity of pre-reinforcement operation and earth excavation is held, the duration of main body soil excavation is shortened.
2, the excavation operation of the main body soil body can not be influenced by longitudinal advanced tubule pre-reinforcement between small pilot tunnel, compensate for biography
After the completion of needing to wait for the last period earth excavation in system technique, the shortcomings that reinforcing the subsequent construction section soil body could be continued；
3, in main body earth excavation, since the construction time that longitudinal per-fore pouring liquid with small pipe is reinforced is longer than earth excavation
Time, therefore take lateral advanced tubule pre-add solid method that can extend reinforcing body hydration reaction time, improve reinforcing body
Intensity and globality.
Detailed description of the invention
Fig. 1 is small pilot tunnel laterally advanced pre-reinforcement process schematic representation；
Fig. 2 is ductule schematic diagram.
In figure, the small pilot tunnel of 1- first；The small pilot tunnel of 2- second；3- ductule；The stabilization zone 4-；5- angle；6- injected hole；7- stops
Starch ring.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.
As depicted in figs. 1 and 2, laterally advanced pre-reinforcing construction method, this method include following step to a kind of small pilot tunnel of tunneling
It is rapid:
(1) in the digging process of tunneling subway station, in tunneling subway station, button arch and the delivery position of skirt piles, center pillar are dug
Small pilot tunnel out；
(2) ductule is installed in the small pilot tunnel；
(3) grouting and reinforcing is carried out to the soil layer the small pilot tunnel by the ductule installed.
Specific steps are as follows:
1) in the digging process of tunneling subway station, in tunneling subway station, button arch and the delivery position of skirt piles, center pillar are dug
Each small pilot tunnel out, respectively the second small pilot tunnel 2 of the first small pilot tunnel 1 in left side and right side；
2) intersect determining along the line for the top intersection of one side with tunneling subway station in the first small pilot tunnel 1 and lay ductule
Hole location, intersect the top intersection of one side with tunneling subway station in the second small pilot tunnel 2 determines the hole location for laying ductule along the line；
First small pilot tunnel 1 is corresponded to each other with the hole location that the second small pilot tunnel 2 is laid；
3) it drills in the hole location that the first small pilot tunnel 1 and the second small pilot tunnel 2 are laid；
4) ductule 3 is placed in the stabilization zone 4 above the vault of tunneling subway station by drilling；
5) it will be placed in above the vault of tunneling subway station from the first small pilot tunnel 1 and the second mutual corresponding hole location of small pilot tunnel 2
The ductule 3 of stabilization zone 4 mutually overlaps.
Wherein, the hole depth of the step 3) drilling is greater than the length of ductule 3, the first small pilot tunnel 1 and the second small 2 cloth of pilot tunnel
Spacing along apertured position between upper hole location is 300mm.
The front end of ductule 3 in step 4) is cone-shaped, ductule tail portion installation grout stop 7；3 length of ductule is
3m, the diameter of ductule 3 are 32mm, and ductule 3 is placed in tunneling subway by drilling with the angle being inclined relative to horizontal
It stands in the stabilization zone 4 of button arch top, the angle of the angle 5 between ductule 3 and horizontal plane is 15 degree.
Tube wall surrounding at the front end of ductule 3 to pipe range 2/3 offers injected hole 6, and the bore dia of injected hole 6 is 8mm；
It is quincunx laying between injected hole 6, each injected hole 6 and in the spacing between the nearest injected hole 6 of quincunx laying is
100mm。
Mutually overlapped that the minimum lap of splice is 312mm for ductule 3.
The pressure of slip casting is 0.3-0.5MPa from the injected hole 6 of ductule 3, and the slurries of grouting are by the group that matches as follows
It is grouped as, water: lime=1:1
In the present embodiment, the deviation that is drilled with of the first small pilot tunnel 1 and the second small laying of pilot tunnel 2 hole location is no more than 5cm, and first is small
The bottom level that the ductule 3 laid in pilot tunnel 1 stays in the small pilot tunnel 1 of one end distance first in the first small pilot tunnel 1 is 4129m,
The abutment wall distance that the small pilot tunnel 1 of distance first intersects one side with tunneling subway station is 1110m；It is laid in second small pilot tunnel 2 small
The bottom level that conduit 3 stays in the small pilot tunnel 2 of one end distance second of the second small pilot tunnel is 3960m, the small pilot tunnel 2 of distance second with it is dark
The abutment wall distance for digging subway station intersection one side is 633m.
The method of the present invention, which focuses on solving, intersects and interferes existing for traditional reinforcement process and earth excavation process, using
Working face of the small pilot tunnel as pre-reinforcement operation for completing preliminary bracing, by laterally setting advanced tubule and complete in small pilot tunnel
At grouting and reinforcing, this reinforcement means do not generated with main body earth excavation process it is any conflict and interference, can be before earth excavation
Continuous strengthing operation is carried out between the holder body soil body each small pilot tunnel, soil mass consolidation is made to have enough time to complete water before excavation
Change reaction, forms the higher Seed harvest of intensity.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (3)
1. a kind of lateral advanced pre-reinforcing construction method of small pilot tunnel of tunneling, which is characterized in that described method includes following steps:
(1) in the digging process of tunneling subway station, in tunneling subway station, the delivery position of button arch and skirt piles, center pillar is dug out small
Pilot tunnel；
(2) ductule is installed in small pilot tunnel；
(3) grouting and reinforcing is carried out to the soil layer the adjacent small pilot tunnel by the ductule installed；
Wherein, step (1) small pilot tunnel includes each small pilot tunnel for being located at the button arch and skirt piles, the delivery position of center pillar；
Wherein, step (2) specifically comprises the following steps:
1) the laying line for laying ductule is determined respectively in the first small pilot tunnel and the second small pilot tunnel；
2) hole location of laying ductule is determined in the laying line ascender line；
3) it drills in the hole location；
4) ductule is placed in drilling；
5) ductule that the described first small pilot tunnel and the second small pilot tunnel are laid is buckled above arch in the tunneling subway station
Stabilization zone overlap joint；
Wherein, the step 1) line of laying is the top intersection that the described first small pilot tunnel intersects one side with the tunneling subway station
Intersect the top intersection of one side with the tunneling subway station with the described second small pilot tunnel；
Wherein, the hole depth of the step 3) drilling is greater than the length of the ductule, and the spacing between the drilling is 300mm；
Wherein, the front end of the step 4) ductule is cone-shaped, and grout stop is installed in ductule tail portion；Ductule length is 3m,
The diameter of ductule is 32mm, and the angle between the ductule and horizontal plane is 15 degree；
Wherein, the tube wall surrounding at the front end of the ductule to pipe range 2/3 offers injected hole, the bore dia of the injected hole
For 8mm；It is quincunx laying between the injected hole, the spacing between the injected hole is 100*100mm.
2. construction method according to claim 1, it is characterised in that: overlapped described in step 5), and the minimum lap of splice is
312mm。
3. construction method according to claim 1, it is characterised in that: the pressure of step (3) described slip casting is 0.3-
The slurries of 0.5MPa, the grouting are grouped as by proportion group as follows, water: lime=1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342203.8A CN105822327B (en) | 2016-05-20 | 2016-05-20 | A kind of lateral advanced pre-reinforcing construction method of the small pilot tunnel of tunneling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342203.8A CN105822327B (en) | 2016-05-20 | 2016-05-20 | A kind of lateral advanced pre-reinforcing construction method of the small pilot tunnel of tunneling |
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| CN105822327A CN105822327A (en) | 2016-08-03 |
| CN105822327B true CN105822327B (en) | 2019-02-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106499409B (en) * | 2016-11-07 | 2018-09-28 | 中国电建集团成都勘测设计研究院有限公司 | The preliminary bracing method of newly-built cavern |
| CN108239985A (en) * | 2016-12-27 | 2018-07-03 | 张双平 | Artificial digging pile per-fore pouring liquid with small pipe pre-reinforcing construction method |
| CN112228118B (en) * | 2020-11-09 | 2023-07-18 | 中铁隧道勘察设计研究院有限公司 | Construction method for controlling deformation of pilot tunnel of underground excavation station of subway |
| CN113309527B (en) * | 2021-06-11 | 2022-03-08 | 北京科技大学 | Upper pilot tunnel pre-camber construction method of double-layer pilot tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2839559Y (en) * | 2005-08-09 | 2006-11-22 | 同济大学 | Arcading tunnel |
| CN102128035B (en) * | 2011-04-29 | 2012-12-26 | 重庆大学 | Construction method of bilateral biased small-clear distance tunnel |
| CN102606167B (en) * | 2012-03-16 | 2014-03-12 | 西安理工大学 | Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel |
| CN202707075U (en) * | 2012-07-23 | 2013-01-30 | 中铁一局集团有限公司 | Long-span subway station main structure constructed based on column and arch method |
| CN103628884B (en) * | 2012-08-29 | 2016-01-27 | 中国水电顾问集团华东勘测设计研究院 | Shared Rock of Neighborhood Tunnel reinforcement means |
| CN102966360A (en) * | 2012-11-26 | 2013-03-13 | 中铁四局集团第二工程有限公司 | Method for reinforcing rock walls in neighborhood tunnel |
| CN203097896U (en) * | 2013-01-31 | 2013-07-31 | 中铁十四局集团有限公司 | Separated type large-section multi-cavern underpass existing building sedimentation controlling structure |
| CN203239357U (en) * | 2013-05-14 | 2013-10-16 | 中交第一公路勘察设计研究院有限公司 | Adjacent tunnel supporting structure suitable for collapsible loess |
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Address after: 100160 701, 7th floor, building 3, yard 10, Automobile Museum East Road, Fengtai District, Beijing Patentee after: China Power Construction Railway Construction Investment Group Co.,Ltd. Address before: 100089 1001, 10th floor, building 2, yard 22, Chegongzhuang West Road, Haidian District, Beijing Patentee before: POWERCHINA RAILWAY CONSTRUCTION Co.,Ltd. |