CN106640137A - Supporting device and supporting method for shallow-buried excavation engineering construction - Google Patents
Supporting device and supporting method for shallow-buried excavation engineering construction Download PDFInfo
- Publication number
- CN106640137A CN106640137A CN201611224770.XA CN201611224770A CN106640137A CN 106640137 A CN106640137 A CN 106640137A CN 201611224770 A CN201611224770 A CN 201611224770A CN 106640137 A CN106640137 A CN 106640137A
- Authority
- CN
- China
- Prior art keywords
- culvert
- inwall
- fixed plate
- grouting pipe
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
-
- 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
- E21D11/006—Lining anchored in the rock
Abstract
The invention provides a shallow-buried excavation supporting device and supporting method. An advancing duct is arranged on a rock, an upper culvert of a culvert is excavated, a plurality of holes are drilled on the inner wall of the upper culvert, fixing plates are arranged on the inner wall of the upper culvert, fixing rods penetrate through the fixing plates and extend to the holes in the inner wall of the upper culvert, fixing teeth on the fixing rods clamp the holes in the inner wall of the upper culvert, cement paste is injected into the holes in the inner wall of the upper culvert via an injection pipe, the fixing plates are combined into a circular arch, the junctions of the fixing plates are welded, a lower culvert is excavated, a support frame is connected with the fixing plates, and then concrete paste is sprayed to form a concrete layer. The device and the method realize early supporting of any position, and can use large machinery for construction; and the device is simple in structure and convenient to assemble.
Description
Technical field
The present invention relates to underground, culvert, tunnel construction field, more particularly to shallow buried and underground excavated engineering project construction is filled with supporting
Put and its method for protecting support.
Background technology
It is in Dryopteris sublaetaChing et Hsu to adopt CRD methods, two side-wall pilot tunnel, these methods to excavate thought based on piecemeal, open more
Dig and repeatedly disturbance country rock is removed in gib, operation conversion is complicated, and operating space is little, is unfavorable for making for heavy mechanical equipment
With construction speed is slow, long in time limit, and cost is high, excavates stability and security is also poor.
The present invention provides a kind of shallow buried and underground excavated engineering project construction work suspension device and its method for protecting support, and the present invention can be realized
Preliminary bracing to the optional position of architectural engineering, and big machinery excavation construction can be used, present configuration is simple, assembling side
Just.
The content of the invention
For achieving the above object, the present invention provides following technical scheme：
Dryopteris sublaetaChing et Hsu engineering suspension device, is arranged in rock mass, and some advanced conduits are arranged on rock mass, and rock excavation is contained
Hole, the upper culvert of culvert point and lower culvert, if excavate on the inwall of upper culvert having dry hole, arrange some fixations on the inwall of upper culvert
Plate, if arranging dry hole in each fixed plate, fix bar extends to the hole excavated on the inwall of culvert through the hole in fixed plate
Interior, fix bar includes shell and Grouting Pipe, and the Grouting Pipe is disposed through inside the shell, and Grouting Pipe two ends are stretched out outside shell
Portion, Grouting Pipe upper end is provided with the second limiting plate, and Grouting Pipe lower end is connected with drawing handle, and fixed block is divided into multi-level and circumference
It is arranged on outer shell outer wall, is arranged in a linear on the fixed block vertical direction of different levels, connecting pin is passed through on each fixed block
A fixing tooth is hinged, the fixing tooth that vertical direction is arranged in a linear is hinged by connecting rod, is provided with shell some thin
Elongated hole, the fixing tooth of the bottom on shell is connected with support bar, and support bar is connected through the elongated hole on shell with portable plate,
Portable plate is located in the space between Grouting Pipe and shell, and the support block that cone-shaped is provided with Grouting Pipe is relative with portable plate
Should, each fixation plate weld is combined into birdcage and is affixed on the inwall of culvert, and lower culvert both sides inwall is correspondingly arranged 2
Support, bracing frame is connected with the fixed plate of upper culvert inwall bottom, and concrete layer covers the birdcage of fixed plate formation and props up
Support.
Specifically, the drawing handle centre position is provided with centre bore, and the centre bore of drawing handle is interior with Grouting Pipe
Hole communicates, and the inwall of the centre bore of drawing handle is provided with internal thread, the internal thread of the centre bore that plug passes through drawing handle with
Drawing handle connects, and drawing handle is connected by 2 symmetrically arranged expansion links with the first limiting plate, and screw is arranged on expansion link
Bar, the first limiting plate is located at the lower end of shell and is connected with fixed plate.
Specifically, the method for protecting support of the Dryopteris sublaetaChing et Hsu engineering suspension device, is included on rock mass and arranges advanced
Conduit, and cement mortar is injected from advanced conduit to rock mass, the upper culvert of culvert is excavated, then excavate on upper culvert inwall some
Hole, often excavate on upper culvert can be at excavation at one inwall on mounting plate, fixed plate is close to the inwall of culvert,
In the hole that fix bar is opened through the inwall that fixed plate extends to upper culvert, pulling the drawing handle of fix bar makes Grouting Pipe in shell
It is interior to move to workmen direction, so as to drive the support block of the cone-shaped being arranged in slip casting pipe outer wall to workmen direction
Mobile, the support block of cone-shaped promotes portable plate to move to rock mass direction, so that the fixing tooth being connected with support bar is opened, when
When fixing tooth is opened to a certain extent, fixing tooth is stuck in the hole opened on culvert inwall, tightens the lead screw on expansion link, is made
The support block of cone-shaped can stably support portable plate, and by the hole opened in Grouting Pipe upwards culvert inwall cement mortar is injected, and make
Fix bar is connected as a single entity with the inwall of upper culvert.
Including when upper culvert excavate reach fixed plate can be made to be combined into dome shape when, weld each fixed plate, make each
Individual fixed plate is linked to be entirety, then excavates lower culvert, and bracing frame is connected with the fixed plate of bottom on upper culvert inwall, then
Again pneumatically placed concrete slurry, makes concrete cover fixed plate and bracing frame, and forms concrete layer.
The present invention provides a kind of Dryopteris sublaetaChing et Hsu engineering suspension device and its method for protecting support, can realize to architectural engineering
Optional position preliminary bracing, and can be constructed using big machinery, present configuration is simple, easy to assembly.
Description of the drawings
Fig. 1 is Dryopteris sublaetaChing et Hsu engineering suspension device of the present invention.
In Fig. 1:Contain under the advanced conduit of 1- rock mass, 2-, 3- fix bars, 4- fixed plates, 5- bracing frames, the upper culverts of 6-, 7-
Hole, 8- concrete layers.
Fig. 2 is the fix bar of Dryopteris sublaetaChing et Hsu engineering suspension device of the present invention.
In Fig. 2:4- fixed plates, the limiting plates of 9- first, 10- expansion links, 11- lead screw, 12- plugs, 13- second are spacing
Plate, 14- drawing handles, 30- fixing tooths, 31- connecting pins, 32- fixed blocks, 33- connecting rods, the support block of 34- cone-shapeds, 35-
Grouting Pipe, 36- support bars, 37- shells, 38- elongated holes, 39- portable plates.
Fig. 3 is the A areas enlarged drawing of Fig. 2.
In Fig. 3:The support block of 34- cone-shapeds, 35- Grouting Pipes, 36- support bars, 37- shells, 38- elongated holes, 39- live
Dynamic plate.
Specific embodiment
This device is elaborated simultaneously below in conjunction with the accompanying drawing of Dryopteris sublaetaChing et Hsu engineering suspension device of the present invention
The method for protecting support of Dryopteris sublaetaChing et Hsu engineering suspension device is explained.
Dryopteris sublaetaChing et Hsu engineering suspension device, is arranged in rock mass 1, and some advanced conduits 2, rock are arranged on rock mass 1
Body 1 excavates culvert, the upper culvert 6 of culvert point and lower culvert 7, if excavate on the inwall of upper culvert 6 having dry hole, the inwall of upper culvert 6
Upper to arrange some fixed plates 4, if arranging dry hole in each fixed plate 4, fix bar 3 extends to culvert through the hole in fixed plate 4
In the hole excavated on the inwall in hole 6, fix bar 3 includes shell 37 and Grouting Pipe 35, and the Grouting Pipe 35 is disposed through shell
In 37, and the two ends of Grouting Pipe 35 are stretched out outside shell 37, and the upper end of Grouting Pipe 35 is provided with the second limiting plate 13, the lower end of Grouting Pipe 35
Drawing handle 14 is connected with, 32 points of fixed block is arranged on the outer wall of shell 37 for multi-level and circumference, the fixed block of different levels
It is arranged in a linear on 32 vertical directions, a fixing tooth 30, vertical direction is hinged by connecting pin 31 on each fixed block 32
The fixing tooth 30 being arranged in a linear is hinged by connecting rod 33, some elongated holes 38 is provided with shell 37, on shell 37 most
The fixing tooth 30 of lower end is connected with support bar 36, and support bar 36 is connected through the elongated hole 38 on shell 37 with portable plate 39, living
Dynamic plate 39 is located at the support block 34 and activity for being provided with cone-shaped in the space between Grouting Pipe 35 and shell 37 in Grouting Pipe 35
Plate 39 is corresponding, and each welding of fixed plate 4 is combined into birdcage and is affixed on the inwall of culvert 6, the both sides inwall pair of lower culvert 7
2 bracing frames 5 should be set, and bracing frame 5 is connected with the fixed plate 4 of the inwall bottom of upper culvert 6, concrete layer 8 covers the shape of fixed plate 4
Into birdcage and bracing frame 5.
Specifically, the centre position of the drawing handle 14 is provided with centre bore, the centre bore and Grouting Pipe of drawing handle 14
35 endoporus is communicated, and the inwall of the centre bore of drawing handle 14 is provided with internal thread, the center that plug 12 passes through drawing handle 14
The internal thread in hole is connected with drawing handle 14, and drawing handle 14 is connected by 2 symmetrically arranged expansion links 10 with the first limiting plate 9
Connect, lead screw 11 is set on expansion link 10, first limiting plate 9 is located at the lower end of shell 37 and is connected with fixed plate 4.
Specifically, the method for protecting support of the Dryopteris sublaetaChing et Hsu engineering suspension device, is included on rock mass 1 and arranges advanced
Conduit 2, and cement mortar is injected from advanced conduit 2 to rock mass 1, the upper culvert 6 of culvert is excavated, then excavate on the inwall of upper culvert 6
If dry hole, often excavate on upper culvert 6 can be at excavation at one inwall on mounting plate 4, fixed plate 4 is close to culvert
6 inwall, in the hole that fix bar 3 is opened through the inwall that fixed plate 4 extends to culvert 6, pulls the drawing handle 14 of fix bar 3
Make Grouting Pipe 35 in shell 37 to the movement of workmen direction, so as to drive the cone-shaped being arranged on the outer wall of Grouting Pipe 35
Support block 34 to workmen direction is moved, and the support block 34 of cone-shaped promotes portable plate 39 to move to the direction of rock mass 1, so that
The fixing tooth 30 being connected with support bar 36 is opened, and when fixing tooth 30 is opened to a certain extent, fixing tooth 30 is stuck in culvert 6
In the hole opened on wall, the lead screw 11 on expansion link 10 is tightened, the support block 34 for enabling cone-shaped stably supports portable plate 39,
Cement mortar is injected by the hole opened in the Grouting Pipe 35 upwards inwall of culvert 6, makes fix bar 3 be connected as a single entity with the inwall of upper culvert 6.
Including when upper culvert 6 excavate reach fixed plate 4 can be made to be combined into dome shape when, weld each fixed plate 4, make
Each fixed plate 4 is linked to be entirety, then excavates lower culvert 7, and bracing frame 5 is connected with the fixed plate 3 of bottom on the inwall of upper culvert 6
Connect, then again pneumatically placed concrete is starched, make concrete cover fixed plate 4 and bracing frame 5, and form concrete layer 8.Concrete layer 8 enters
One step its support reinforcement device, the bearing capacity for making suspension device is further strengthened.
Claims (4)
1. Dryopteris sublaetaChing et Hsu engineering suspension device, is arranged at rock mass（1）It is interior, it is characterised in that：Rock mass（1）It is upper to arrange some
Advanced conduit（2）, rock mass（1）Excavate culvert, the upper culvert of culvert point（6）With lower culvert（7）, upper culvert（6）Inwall on excavate
If there is dry hole, upper culvert（6）Inwall on some fixed plates are set（4）, each fixed plate（4）If upper setting dry hole, fix bar
（3）Through fixed plate（4）On hole extend to culvert（6）Inwall on excavate hole in, fix bar（3）Including shell（37）
With Grouting Pipe（35）, the Grouting Pipe（35）It is disposed through shell（37）It is interior, and Grouting Pipe（35）Stretch out shell in two ends（37）
Outside, Grouting Pipe（35）Upper end is provided with the second limiting plate（13）, Grouting Pipe（35）Lower end is connected with drawing handle（14）, it is fixed
Block（32）It is divided at many levels and circumference is arranged at shell（37）On outer wall, the fixed block of different levels（32）In straight on vertical direction
Line is arranged, each fixed block（32）It is upper to pass through connecting pin（31）It is hinged a fixing tooth（30）, vertical direction is arranged in a linear
Fixing tooth（30）By connecting rod（33）It is hinged, shell（37）On be provided with some elongated holes（38）, shell（37）On most
The fixing tooth of lower end（30）It is connected with support bar（36）, support bar（36）Through shell（37）On elongated hole（38）With portable plate
（39）Connection, portable plate（39）Positioned at Grouting Pipe（35）With shell（37）Between space in, Grouting Pipe（35）On be provided with cone
The support block of shape（34）With portable plate（39）It is corresponding, each fixed plate（4）Welding is combined into birdcage and is affixed on culvert
（6）Inwall on, lower culvert（7）Both sides inwall is correspondingly arranged 2 bracing frames（5）, bracing frame（5）With upper culvert（6）Inwall bottom
The fixed plate in portion（4）Connection, concrete layer（8）Cover fixed plate（4）The birdcage and bracing frame of formation（5）.
2. suspension device as claimed in claim 1, it is characterised in that：The drawing handle（14）Centre position is provided with center
Hole, drawing handle（14）Centre bore and Grouting Pipe（35）Endoporus communicate, drawing handle（14）Centre bore inwall arrange
There are internal thread, plug（12）By drawing handle（14）The internal thread of centre bore be connected with drawing handle (14), drawing handle
（14）By 2 symmetrically arranged expansion links（10）With the first limiting plate（9）Connection, expansion link（10）Upper setting lead screw
（11）, first limiting plate（9）Positioned at shell（37）Lower end and and fixed plate（4）Connection.
3. a kind of method for protecting support for claim 1-2 Dryopteris sublaetaChing et Hsu engineering suspension device, it is characterised in that：In rock
Body（1）It is upper that advanced conduit is set（2）, and from advanced conduit（2）To rock mass（1）Injection cement mortar, excavates the upper culvert of culvert
（6）, then in upper culvert（6）If dry hole is excavated on inwall, in upper culvert（6）On often excavate can be at excavation at one inwall on
Mounting plate（4）, fixed plate（4）It is close to culvert（6）Inwall, fix bar（3）Through fixed plate（4）Extend to culvert
（6）The hole opened of inwall in, pull fix bar（3）Drawing handle（14）Make Grouting Pipe（35）In shell（37）It is interior to constructor
The movement of member direction, so as to drive Grouting Pipe is arranged on（35）The support block of the cone-shaped on outer wall（34）Move to workmen direction
It is dynamic, the support block of cone-shaped（34）Promote portable plate（39）To rock mass（1）Direction is moved, so that and support bar（36）Connection
Fixing tooth（30）Open, work as fixing tooth（30）When opening to a certain extent, fixing tooth（30）It is stuck in culvert（6）Open on inwall
In hole, expansion link is tightened（10）On lead screw（11）, make the support block of cone-shaped（34）Portable plate can stably be supported（39）,
By Grouting Pipe（35）Culvert upwards（6）The hole injection cement mortar opened on inwall, makes fix bar（3）With upper culvert（6）Inwall
It is connected as a single entity.
4. method for protecting support as claimed in claim 3, it is characterised in that：When upper culvert（6）Excavation reaches can make fixed plate（4）Group
During synthesis dome shape, each fixed plate is welded（4）, make each fixed plate（4）It is linked to be entirety, then excavates lower culvert（7）, and
By bracing frame（5）With upper culvert（6）The fixed plate of bottom on inwall（3）Connection, then again pneumatically placed concrete is starched, and covers concrete
Fixed plate（4）With bracing frame（5）, and form concrete layer（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611224770.XA CN106640137B (en) | 2016-12-27 | 2016-12-27 | Shallow buried and underground excavated engineering project construction suspension device and its method for protecting support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611224770.XA CN106640137B (en) | 2016-12-27 | 2016-12-27 | Shallow buried and underground excavated engineering project construction suspension device and its method for protecting support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640137A true CN106640137A (en) | 2017-05-10 |
| CN106640137B CN106640137B (en) | 2018-01-30 |
Family
ID=58831522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611224770.XA Expired - Fee Related CN106640137B (en) | 2016-12-27 | 2016-12-27 | Shallow buried and underground excavated engineering project construction suspension device and its method for protecting support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640137B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143345A (en) * | 2017-05-17 | 2017-09-08 | 熊伟 | Shallow buried covered excavation drilling suspension device and its method for protecting support |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100558469B1 (en) * | 2005-09-08 | 2006-03-10 | (주)한석엔지니어링 | The compressing permanent anchor |
| JP2009052269A (en) * | 2007-08-27 | 2009-03-12 | Ohbayashi Corp | Arch concrete curing method and curing agent spraying apparatus |
| CN202139588U (en) * | 2011-06-18 | 2012-02-08 | 山东大学 | Novel self-broaching anchor rod |
| CN103277118A (en) * | 2013-06-04 | 2013-09-04 | 中铁第一勘察设计院集团有限公司 | Joint steel frame supporting system for excavating auxiliary tunnel on main-tunnel arch wall and construction method of joint steel frame supporting system |
| CN203756182U (en) * | 2014-04-04 | 2014-08-06 | 湖南省高速公路建设开发总公司 | Support structure applied to shallow road tunnel in weak rock area |
| CN203961998U (en) * | 2014-07-07 | 2014-11-26 | 陕西路桥集团第一工程有限公司 | A kind of shallow tunnel combined type preliminary bracing structure |
| CN205422779U (en) * | 2016-03-24 | 2016-08-03 | 山东科技大学 | Side direction supports and to let pressure formula slip casting stock |
-
2016
- 2016-12-27 CN CN201611224770.XA patent/CN106640137B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100558469B1 (en) * | 2005-09-08 | 2006-03-10 | (주)한석엔지니어링 | The compressing permanent anchor |
| JP2009052269A (en) * | 2007-08-27 | 2009-03-12 | Ohbayashi Corp | Arch concrete curing method and curing agent spraying apparatus |
| CN202139588U (en) * | 2011-06-18 | 2012-02-08 | 山东大学 | Novel self-broaching anchor rod |
| CN103277118A (en) * | 2013-06-04 | 2013-09-04 | 中铁第一勘察设计院集团有限公司 | Joint steel frame supporting system for excavating auxiliary tunnel on main-tunnel arch wall and construction method of joint steel frame supporting system |
| CN203756182U (en) * | 2014-04-04 | 2014-08-06 | 湖南省高速公路建设开发总公司 | Support structure applied to shallow road tunnel in weak rock area |
| CN203961998U (en) * | 2014-07-07 | 2014-11-26 | 陕西路桥集团第一工程有限公司 | A kind of shallow tunnel combined type preliminary bracing structure |
| CN205422779U (en) * | 2016-03-24 | 2016-08-03 | 山东科技大学 | Side direction supports and to let pressure formula slip casting stock |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143345A (en) * | 2017-05-17 | 2017-09-08 | 熊伟 | Shallow buried covered excavation drilling suspension device and its method for protecting support |
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| Publication number | Publication date |
|---|---|
| CN106640137B (en) | 2018-01-30 |
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