CN108590712A - A kind of construction method that double -side approach excavates - Google Patents
A kind of construction method that double -side approach excavates Download PDFInfo
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- CN108590712A CN108590712A CN201810341123.XA CN201810341123A CN108590712A CN 108590712 A CN108590712 A CN 108590712A CN 201810341123 A CN201810341123 A CN 201810341123A CN 108590712 A CN108590712 A CN 108590712A
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- base tunnel
- heading
- top heading
- tunnel
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- 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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
-
- 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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
- E21D11/406—Placing endless lining elements, e.g. from reels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
Abstract
A kind of construction method of double -side approach excavation supporting, it is related to technical field of tunnel construction, pass sequentially through joint protective, the dismounting of left side top heading or the interim arch of right side top heading, the excavation supporting of base tunnel in top, base tunnel is longitudinally constructed in top, reinforce Construction of Supporting, new side-wall hole and the closing of old hole, base tunnel in left side, in right side under base tunnel and left side under base tunnel and right side base tunnel excavation supporting, excavation with guide pit supporting step under base tunnel and middle part in middle part, it ensure that the cleaning of connecting portion, reduce the disturbance at demolishing process center tap position, be conducive to middle part top heading main body arch and connect cyclization with left side and right side body arch, improve construction quality；The present invention effectively reduces construction in later period height difference risk, while reducing construction in later period equipment and personnel's input, greatly improves construction organization production efficiency, is conducive to completion time of project saving, with good economic efficiency and safety assurance.
Description
Technical field
The present invention relates to technical field of tunnel construction, the construction method excavated more particularly, to a kind of double -side approach.
Background technology
It is well known, as urban transportation and the fast development of modernization construction, urban track traffic have become urban construction
In an important vehicles.The environment that urban track traffic faces is complicated and changeable, and diversification, all kinds of friendships are presented in geological conditions
Logical circuit, the crisscross intersection of underground utilities select suitable construction particularly important in large cross-section tunnel construction；Double side wall is led
Hole method is a kind of method of constructing tunnel, is widely used in the work progress of each underground station, work progress process rank
It connects and links closely, each base tunnel sequence of construction is clearly demarcated, and double -side approach construction increases interim Auxiliary support in addition to main body supporting and arranges
It applies, interim Auxiliary support measure is constructed together with main body supporting, is improved the supporting intensity in excavation and support processes, is conducive to
The maintenance of surrounding rock stability, temporary support can be removed after process and be used in turn.
Existing double -side approach excavation supporting working procedure is：Left and right sides upper, middle and lower excavation with guide pit supporting → middle part
Upper, middle and lower excavation with guide pit supporting → completion preliminary bracing, but have the following disadvantages：1, left and right sides top base tunnel main body
Arch is bolted in joint area by connecting with gib arch, and full shotcrete support, connector has pollution, at middle part
In top heading work progress, it is unfavorable for middle part top heading main body arch and is connect with left and right sides top base tunnel main body arch, and after
Phase interim arch is removed difficult；2, it will be applied after left side, the construction of right side base tunnel according to the working procedure at left side, right side, middle part
Base tunnel in the middle part of work, construction part can form larger height difference to middle part base tunnel distance, and work progress limitation is more, be unfavorable for personnel and
Mechanical execution safety.
Invention content
In order to overcome the shortcomings of in background technology, the invention discloses a kind of construction parties of double -side approach excavation supporting
Method in the case of and underground water content weakness good in rock integrity, is guidance with monitoring and measurement data, passes sequentially through left side
And excavation with guide pit supporting, setting in right upper portion base tunnel setting protective device, the dismounting trepanning of the interim arch of base tunnel side wall, top
Reinforce in support, new side-wall hole and the closing of old hole, left side and right side, lower part base tunnel excavation supporting, base tunnel and middle part in middle part
The step of lower excavation with guide pit supporting, realizes the purpose for improving construction quality and reducing security risk.
In order to realize that the goal of the invention, the present invention adopt the following technical scheme that：
A kind of construction method of double -side approach excavation supporting, specifically includes following steps：
（1）, joint protective：
After the completion of left side top heading or right side top heading supporting arch, to the main body arch of left side top heading or right side top heading
Protective device is arranged in external with the jointing of left side top heading or the interim arch of right side top heading, and on entire left side
The external spray of the main body arch of base tunnel or right side top heading, the interim arch of left side top heading or right side top heading and protective device
It penetrates concrete and completes preliminary bracing；Left side top heading and right side top heading excavate the distance that is staggered before and after tunnel longitudinal direction and are not less than
15m respectively constructs left side top heading and right side top heading 50-80m by above-mentioned measure；
（2）, left side top heading or the interim arch of right side top heading dismounting：
Previous step is connect, after left side top heading and the construction distance satisfaction transport requirement of right side top heading, base tunnel in construction left side
Or base tunnel in right side, when base tunnel is constructed in base tunnel or right side in left side, select on the left of top heading or right side top heading as applying
The work surface of work cuts left side top heading or the interim arch of right side top heading and left side top heading or right side top heading main body arch
Gunite concrete on jointing unlocks the connection bolt of protective device and jointing so that left side top heading or right side
Top heading main body arch and left side top heading or the interim arch constraint relief of right side top heading, cut jointing with lower portion
It is interim to remove top heading or the interim arch of right side top heading, left side top heading or right side top heading on the left of whole section for gunite concrete
Arch only removes two Pin every time when removing, and removes 4 ~ 6m of width in total, forms base tunnel areole, often removes on once needing to complete
It could continue to remove after base tunnel supporting construction in portion；
（3）, in top base tunnel excavation supporting：
Previous step is connect, after often removing two Pin left side top headings or the interim arch of right side top heading, using controlled blasting to top
The soil body of middle base tunnel is excavated, and when excavation with guide pit is extremely 40-60cm ranges apart from other side base tunnel side wall, manually abolishes rock
Body cuts the gunite concrete of the side jointing, unlocks protective device, by left side top heading and right side top heading main body arch
It is connected and fixed with the supporting arch of base tunnel in top, and gunite concrete, completes the supporting of base tunnel in top；
（4）, base tunnel is longitudinally constructed in top：
Previous step is connect, base tunnel carries out excavation supporting along tunnel longitudinal direction in top, constructs using controlled blasting, outermost
The distance arround holes of layer are arranged with a distance from base tunnel side wall not less than 50cm, and the hole slag slag-tapping device after excavation is from base tunnel areole
Position is transported, and supporting is completed in time after excavation；
（5）, reinforce Construction of Supporting：
Previous step is connect, when base tunnel reaches 15m~18m along tunnel longitudinal direction construction length in top, apart from area
One group of vertical reinforcement support is set at the 5m in face, and the injection coagulation of preliminary bracing is chiseled at base tunnel arch supporting position in top
Native face layer, the supporting arch of base tunnel in the top and top of reinforcing support is welded, and implements to reinforce branch to base tunnel in entire top
Shield；
（6）, new side-wall hole and old hole closing：
Chisel 7 position of face be completed on the left of two Pin of base tunnel supporting in top top heading or the interim arch of right side top heading with
The gunite concrete of left side top heading or the interim arch jointing of right side top heading unlocks the protection dress of the side jointing
It sets, and releases the connection bolt of jointing, remove the gib of the side base tunnel side wall, form new base tunnel areole, to
Base tunnel in preceding construction top in top after the completion of the supporting of base tunnel, continues the gib for removing the base tunnel side wall, forms one
A width is the base tunnel areole of 4-6m, and base tunnel opens a base tunnel at interval of 15-18m in base tunnel side wall gib in top
Areole is closed after new base tunnel areole opens up, while to a upper base tunnel areole, and so on；
（7）, in left side in base tunnel, right side under base tunnel and left side under base tunnel, right side base tunnel excavation supporting：
Base tunnel is along in longitudinal excavation and support processes in top, on the left of synchronous excavation supporting in base tunnel in base tunnel or right side, it is left
Base tunnel should longitudinally have the longitudinal separation not less than 15m along tunnel in base tunnel and right side in side, be led when in base tunnel in left side or right side
It cheats after excavation supporting is more than 15m, in the case where meeting transport and requiring, base tunnel under the lower base tunnel in implementation left side or right side can be synchronized and opened
Supporting is dug, base tunnel should longitudinally have the longitudinal separation not less than 15m along tunnel under base tunnel and right side under left side, successively left and right, up and down
Stepped propelling construction；
（8）, excavation with guide pit supporting under base tunnel and middle part in middle part；
As excavation with guide pit supporting 15m ~ 30m under base tunnel under left side and right side, left side top heading and right side top heading main body are released
The constraint of arch and interim arch removes and reinforces support and interim side wall, excavates the rock mass of base tunnel under base tunnel and middle part in middle part,
Complete the closing of preliminary bracing loopful.
The construction method that the double -side approach excavates, step（1）In protective device be in the outside of jointing
Using sponge wrapping and fixation；The left side top heading or right side top heading are to be selected according to sequence of construction, and the two selects one first
Construction, when the distance that is longitudinally staggered is more than 15m, the synchronous excavation supporting other side.
The construction method that the double -side approach excavates, step（4）In top in the excavation clear height of base tunnel arch be
3.5m。
The construction method that the double -side approach excavates, step（5）In vertical reinforcement support by it is two rows of side by side between
It is formed every the reinforced steel of setting, often arranges reinforced steel and be disposed as at least four, weld 0.5m's wide in reinforced steel bottom
Elongated steel plate, elongated steel plate thickness 16mm, is equipped at intervals with the angle steel of more transverse directions on multiple rows of reinforced steel, at two adjacent angles
Steel it is diagonal between be equipped with the angle steel of cross-fixing, elongated steel plate bottom is placed in hard smooth base.
The construction method that the double -side approach excavates, step（6）In closing step concrete operations be：By dismounting
Left side top heading or the interim arch of right side top heading reset installation, are fixed using connection bolt, are fixed using protective device
Concrete spraying support afterwards.
The construction method that the double -side approach excavates, base tunnel or the right side in left side top heading or right side top heading, left side
The sequence of excavation of base tunnel is determined according to sequence of construction under base tunnel or right side under base tunnel, left side in side, and the two choosing is first, to work as selection left
When side, base tunnel under base tunnel, left side is preferentially selected in top heading on the left of excavation supporting, left side at top, middle part, lower part；It is elected
When selecting right side, base tunnel under base tunnel, right side is preferentially selected in top heading on the right side of excavation supporting, right side at top, middle part, lower part.
By adopting the above-described technical solution, the present invention has the advantages that：
The construction method that double -side approach of the present invention excavates takes package in temporary support and main body arch joint location
Provisional protection, in later stage top base tunnel arch connection and gib demolishing process in, ensure that the clean of connecting portion
Only, the disturbance for reducing demolishing process center tap position is conducive to middle part top heading main body arch and encircles with left side and right side body
Frame connection cyclization, improves construction quality；When base tunnel is constructed in the middle part of left or right side, strengthening measure is taken led on middle part
Hole construction, middle part top heading dregs is transported outward by established transport channel, when left or right side lower part base tunnel is constructed, in
Supporting is completed in portion's top heading, only needs to release top base tunnel and left side and right side base tunnel connection constraints at this time, removes and reinforce support
And temporary support.
The present invention effectively reduces construction in later period height difference risk, while reducing construction in later period equipment and personnel's input, greatly
Width improves construction organization production efficiency, is conducive to completion time of project saving, with good economic efficiency and safety assurance.
Description of the drawings
Fig. 1 is base tunnel distribution schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of inventive joint protection；
Fig. 3 is base tunnel side-wall hole schematic diagram of the present invention；
Fig. 4 is construction schematic diagram in base tunnel longitudinal direction in top of the present invention；
Fig. 5 is that the present invention reinforces the lateral schematic diagram of support；
Fig. 6 is that the present invention reinforces the longitudinal construction schematic diagram of support；
In figure：1, protective device；2, jointing；3, main body arch；4, interim arch；5, right side top heading；6, it is led on left side
Hole；7, face；8, reinforced steel；9, country rock；10, arch supporting；11, angle steel；12, elongated steel plate；13, base tunnel side wall；14、
Manually abolish rock mass；15, supporting arch；16, base tunnel in top；17, base tunnel areole；18, base tunnel in left side；19, under left side
Base tunnel；20, base tunnel in middle part；21, base tunnel in right side；22, base tunnel under middle part；23, base tunnel under right side.
Specific implementation mode
By the following examples can the detailed explanation present invention, the open purpose of the present invention is intended to protect model of the present invention
Enclose all interior technological improvements.
The construction method of double -side approach excavation supporting in conjunction with described in attached drawing 1-6, specifically includes following steps：
（1）, joint protective：
After the completion of 5 supporting arch of left side top heading 6 or right side top heading, to the main body of left side top heading 6 or right side top heading 5
The external setting protective device 1 of arch 3 and the jointing 2 of left side top heading 6 or the interim arch 4 of right side top heading 5, and
The main body arch 3 of entire left side top heading 6 or right side top heading 5, left side top heading 6 or right side top heading 5 interim arch 4 and
The outer jet concrete of protective device 1 completes preliminary bracing；Left side top heading 6 and right side top heading 5 excavate vertical along tunnel
The distance that is staggered forwards, backwards is not less than 15m, and left side top heading 6 and right side top heading 5 are respectively constructed 50-80m by above-mentioned measure；
（2）, 5 interim arch 4 of left side top heading 6 or right side top heading dismounting：
Previous step is connect, after left side top heading 6 and the construction distance satisfaction transport requirement of right side top heading 5, construction is led in left side
Base tunnel 21 in hole 18 or right side, when base tunnel 21 is constructed in base tunnel 18 or right side in left side, on selection left side top heading 6 or right side
Work surface of the base tunnel 5 as construction cuts left side top heading 6 or 5 interim arch 4 of right side top heading and left side top heading 6 or the right side
Gunite concrete on 5 main body arch of side top heading, 3 jointing 2, unlocks the connection bolt of protective device 1 and jointing 2,
So that left side top heading 6 or 5 main body arch 3 of right side top heading are released with left side top heading 6 or 5 interim arch 4 of right side top heading
Constraint cuts jointing 2 with the gunite concrete of lower portion, removes top heading 6 or right side top heading 5 on the left of whole section and encircles temporarily
Frame 4, left side top heading 6 or 5 interim arch 4 of right side top heading only remove two Pin every time when removing, and remove 4 ~ 6m of width, shape in total
At base tunnel areole 17, often removes and once need to complete to continue to remove after 16 supporting construction of base tunnel in top；
（3）, in top base tunnel 16 excavation supporting：
Previous step is connect, after often removing two Pin left side top headings 6 or 5 interim arch 4 of right side top heading, using controlled blasting to upper
The soil body of base tunnel 16 is excavated in portion, when excavation with guide pit is extremely 40-60cm ranges apart from other side base tunnel side wall 13, manually
Rock mass 14 is abolished, the gunite concrete of the side jointing 2 is cut, unlocks protective device 1, it will be on left side top heading 6 and right side
5 main body arch 3 of base tunnel and the supporting arch 15 of base tunnel in top 16 are connected and fixed, and gunite concrete, complete base tunnel in top
16 supporting；
（4）, the longitudinal construction of base tunnel 16 in top：
Previous step is connect, base tunnel 16 carries out excavation supporting along tunnel longitudinal direction in top, constructs using controlled blasting, most
The distance arround holes of outer layer are arranged with a distance from base tunnel side wall 13 not less than 50cm, and the hole slag slag-tapping device after excavation is from base tunnel side
17 position of cinclides is transported, and supporting is completed in time after excavation；
（5）, reinforce Construction of Supporting：
Previous step is connect, when base tunnel 16 reaches 15m~18m along tunnel longitudinal direction construction length in top, is slapped in distance
One group of vertical reinforcement support is set at the 5m in sub- face 7, and preliminary bracing is chiseled at 16 arch supporting of base tunnel, 10 position in top
Gunite concrete face layer, the supporting arch 15 of base tunnel 16 in the top and top of reinforcing support is welded, to being led in entire top
Implement strengthening supporting in hole 16；
（6）, new side-wall hole and old hole closing：
It chisels 7 position of face and top heading 6 or the interim arch of right side top heading 5 on the left of two Pin of 16 supporting of base tunnel in top is completed
The gunite concrete of frame 4 and 4 jointing 2 of left side top heading 6 or 5 interim arch of right side top heading, unlocks the side jointing 2
Protective device 1, and release the connection bolt of jointing 2, remove the gib of the side base tunnel side wall 13, form new lead
Areole 17 is cheated, base tunnel 16 in top of constructing forward in top after the completion of the supporting of base tunnel 16, continues to remove the base tunnel side wall
13 gib forms the base tunnel areole 17 that a width is 4-6m, and base tunnel hole 16 is being led at interval of 15-18m in top
A base tunnel areole 17 is opened in 13 gib of side wall of hole, is led after new base tunnel areole 17 opens up, while to upper one
Hole areole 17 is closed, and so on；
（7）, in left side in base tunnel 18, right side under base tunnel 21 and left side under base tunnel 19, right side base tunnel 23 excavation supporting：
Base tunnel 16 is along in longitudinal excavation and support processes in top, on the left of synchronous excavation supporting in base tunnel in base tunnel 18 or right side
21, base tunnel 21 should longitudinally have the longitudinal separation not less than 15m along tunnel in base tunnel 18 and right side in left side, when base tunnel 18 in left side
Or 21 excavation supporting of base tunnel, in the case where meeting transport requirement, can synchronize lower base tunnel 19 on the left of implementation more than after 15m in right side
Or 23 excavation supporting of base tunnel under right side, should longitudinally there is not less than before 15m base tunnel 23 along tunnel under base tunnel 19 and right side under left side
Distance afterwards controls, upper and lower stepped propelling construction successively；
（8）, 22 excavation supporting of base tunnel under base tunnel 20 and middle part in middle part；
As 23 excavation supporting 15m ~ 30m of base tunnel under base tunnel 19 under left side and right side, left side top heading 6 and right side top heading are released
The constraint of 5 main body arches 3 and interim arch 4, removes and reinforces support and interim side wall, excavates in middle part and is led under base tunnel 20 and middle part
The rock mass in hole 22 completes the closing of preliminary bracing loopful.
The construction method that the double -side approach excavates, step（1）In protective device 1 be in the outer of jointing 2
Portion uses sponge wrapping and fixation.The left side top heading 6 or right side top heading 5 are to be selected according to sequence of construction, and the two selects it
One first constructs, when the distance that is longitudinally staggered is more than 15m, the synchronous excavation supporting other side.
The construction method that the double -side approach excavates, step（4）In top in 16 arch of base tunnel excavation clear height
For 3.5m.
The construction method that the double -side approach excavates, step（5）In vertical reinforcement support by it is two rows of side by side between
It is formed every the reinforced steel 8 of setting, often arranges reinforced steel 8 and be disposed as at least four, 0.5m wide is welded in 8 bottom of reinforced steel
Elongated steel plate 12,12 thickness 16mm of elongated steel plate is equipped at intervals with the angle steel 11 of more transverse directions, in phase on multiple rows of reinforced steel 8
Two adjacent angle steel 11 it is diagonal between be equipped with the angle steel 11 of cross-fixing, 12 bottom of elongated steel plate is placed on hard smooth
In base.
The construction method that the double -side approach excavates, step（6）In closing step concrete operations be：By dismounting
Left side top heading 6 or 5 interim arch 4 of right side top heading reset installation, are fixed using connection bolt, are carried out using protective device 1
Concrete spraying support after fixation.
The construction method that the double -side approach excavates, base tunnel 18 in left side top heading 6 or right side top heading 5, left side
Or the sequence of excavation of base tunnel 23 determines that the two selects it according to sequence of construction under base tunnel 19 or right side under base tunnel 21, left side in right side
One, when selecting left side, base tunnel 18 in top heading 6, left side, left is preferentially selected on the left of excavation supporting at top, middle part, lower part
Base tunnel 19 under side；When selecting right side, preferentially selected at top, middle part, lower part on the right side of excavation supporting in top heading 5, right side
Base tunnel 23 under base tunnel 21, right side.
Embodiment 1：
（1）, joint protective：
After the completion of 6 supporting arch of left side top heading, top heading 6 main body arch 3 in left side is faced with left side top heading 6 using sponge
When arch 4 the external of jointing 2 protective device 1 is set, and led on the main body arch 3 of entire left side top heading 6, left side
The interim arch 4 in hole 6 and the outer jet concrete of protective device 1 complete preliminary bracing.When 6 excavation supporting of left side top heading away from
When from more than 15m, top heading 5 on the right side of synchronous excavation supporting, the 5 joint protective measure of right side top heading with left side top heading 6, until
5 each excavation supporting 50-80m of left side top heading 6 and right side top heading；
（2）, 5 interim arch 4 of left side top heading 6 or right side top heading dismounting：
Previous step is connect, after left side top heading 6 and the construction distance satisfaction transport requirement of right side top heading 5, construction is led in left side
Hole 18 when base tunnel 18 is constructed in left side, selects left side top heading 6 as the work surface of construction, cuts left side top heading 6
Interim arch 4 and the gunite concrete on the jointing 2 of 6 main body arch 3 of left side top heading, unlock protective device 1 and connection
The connection bolt of connector 2 so that 6 main body arch 3 of left side top heading and 6 interim arch of left side top heading, 4 constraint relief, the company of cutting
Connector 2 removes 6 interim arch 4 of top heading on the left of whole section, 6 interim arch 4 of left side top heading with the gunite concrete of lower portion
Two Pin are only removed when dismounting every time, remove 4 ~ 6m of width in total, form base tunnel areole 17, often removes and once needs to complete top
It could continue to remove after 16 supporting construction of middle base tunnel；
（3）, in top base tunnel 16 excavation supporting：
Previous step is connect, is often removed on the left of two Pin after 6 interim arch 4 of top heading, using controlled blasting to base tunnel in top 16
The soil body is excavated, and when excavation with guide pit is extremely 40-60cm ranges apart from other side base tunnel side wall 13, manually abolishes rock mass 14,
The gunite concrete for cutting the side jointing 2 unlocks protective device 1, by 6 main body arch 3 of left side top heading, right side top heading
The supporting arch 15 of 5 main body arches 3 and base tunnel in top 16 is connected and fixed, and gunite concrete, completes base tunnel 16 in top
Supporting；
（4）, the longitudinal construction of base tunnel 16 in top：
Previous step is connect, base tunnel 16 carries out excavation supporting along tunnel longitudinal direction in top, constructs using controlled blasting, most
The distance arround holes of outer layer are arranged with a distance from base tunnel side wall 13 not less than 50cm, and the hole slag slag-tapping device after excavation is from base tunnel side
17 position of cinclides is transported, and supporting is completed in time after excavation；
（5）, reinforce Construction of Supporting：
Previous step is connect, when base tunnel 16 reaches 15m~18m along tunnel longitudinal direction construction length in top, is slapped in distance
One group of vertical reinforcement support is set at the 5m in sub- face 7, and preliminary bracing is chiseled at 16 arch supporting of base tunnel, 10 position in top
Gunite concrete face layer, the supporting arch 15 of base tunnel 16 in the top and top of reinforcing support is welded, to being led in entire top
Implement strengthening supporting in hole 16；
（6）, new side-wall hole and old hole closing：
It chisels 7 position of face 6 interim arch 4 of top heading on the left of two Pin of 16 supporting of base tunnel in top is completed and led on left side
The gunite concrete for cheating 6 interim arch, 4 jointing 2, unlocks the protective device 1 of the side jointing 2, and releases jointing
2 connection bolt removes the gib of the side base tunnel side wall 13, forms new base tunnel areole 17, in top of constructing forward
Base tunnel 16 in top after the completion of the supporting of base tunnel 16, continues the gib for removing the base tunnel side wall 13, forms a width
For the base tunnel areole 17 of 4-6m, base tunnel hole 16 is opened one in 13 gib of base tunnel side wall at interval of 15-18m and is led in top
Areole 17 is cheated, is closed after new base tunnel areole 17 opens up, while to a upper base tunnel areole 17, successively class
It pushes away, closing step is：The 6 interim arch 4 of left side top heading of dismounting is resetted into installation, is fixed using connection bolt, uses protection
Rear concrete spraying support is fixed in device 1；
（7）, in left side in base tunnel 18, right side under base tunnel 21 and left side under base tunnel 19, right side base tunnel 23 excavation supporting：
Base tunnel 16 is along in longitudinal excavation and support processes in top, on the left of excavation supporting in base tunnel 18, when base tunnel 18 in left side
After excavation supporting is more than 15m, base tunnel 21 in excavation supporting right side can be synchronized, base tunnel 21 continues excavation supporting forward in right side,
In the case of meeting transport requirement, left side 19 excavation supporting of lower base tunnel can be implemented, when 19 excavation supporting of base tunnel is more than 15m under left side
Afterwards, base tunnel 23 can be descended on the right side of excavation supporting, successively left and right, upper and lower stepped propelling construction.
（8）, 22 excavation supporting of base tunnel under base tunnel 20 and middle part in middle part；
As 23 excavation supporting 15m ~ 30m of base tunnel under base tunnel 19 under left side and right side, left side top heading 6 and right side top heading are released
The constraint of 5 main body arches 3 and interim arch 4, removes and reinforces support and interim side wall, excavates in middle part and is led under base tunnel 20 and middle part
The rock mass in hole 22 completes the closing of preliminary bracing loopful.
Embodiment 2
（1）, joint protective：
After the completion of 5 supporting arch of right side top heading, top heading 5 main body arch 3 in right side is faced with right side top heading 5 using sponge
When arch 4 the external of jointing 2 protective device 1 is set, and led on the main body arch 3 of entire right side top heading 5, right side
The interim arch 4 in hole 5 and the outer jet concrete of protective device 5 complete preliminary bracing.When 5 excavation supporting of right side top heading away from
After more than 15m, top heading 6 on the left of synchronous excavation supporting, the 6 joint protective measure of left side top heading with right side top heading 5, until
6 each excavation supporting 50-80m of right side top heading 5 and left side top heading；
（2）, 5 interim arch 4 of right side top heading dismounting：
Previous step is connect, after right side top heading 5 and the construction distance satisfaction transport requirement of left side top heading 6, construction is led in right side
Hole 21.When base tunnel 21 is constructed in right side, right side top heading 5 is selected to cut facing for right side top heading 5 as the work surface of construction
When arch 4 and 5 main body arch 3 of right side top heading jointing 2 on gunite concrete, unlock protective device 1 and connect
First 2 connection bolt so that 5 main body arch 3 of right side top heading and 5 interim arch of right side top heading, 4 constraint relief cut connection
Connector 2 removes 5 interim arch 4 of top heading on the right side of whole section with the gunite concrete of lower portion, and top heading 5 interim arch 4 in right side is torn open
Except when only remove two Pin every time, remove 4 ~ 6m of width in total, form base tunnel areole 17, often remove and once needs to complete in top
It could continue to remove after 16 supporting construction of base tunnel；
（3）, in top base tunnel 16 excavation supporting：
Previous step is connect, is often removed on the right side of two Pin after 5 interim arch 4 of top heading, using controlled blasting to base tunnel in top 16
The soil body is excavated, and when excavation with guide pit is extremely 40-60cm ranges apart from other side base tunnel side wall 13, manually abolishes rock mass 14,
The gunite concrete for cutting the side jointing 2 unlocks protective device 1, by 5 main body arch 3 of right side top heading, left side top heading
The supporting arch 15 of 6 main body arches 3 and base tunnel in top 16 is connected and fixed, and gunite concrete, completes base tunnel 16 in top
Supporting；
（4）, the longitudinal construction of base tunnel 16 in top：
Previous step is connect, base tunnel 16 carries out excavation supporting along tunnel longitudinal direction in top, constructs using controlled blasting, most
The distance arround holes of outer layer are arranged with a distance from base tunnel side wall 13 not less than 50cm, and the hole slag slag-tapping device after excavation is from base tunnel side
17 position of cinclides is transported, and supporting is completed in time after excavation；
（5）, reinforce Construction of Supporting：
Previous step is connect, when base tunnel 16 reaches 15m~18m along tunnel longitudinal direction construction length in top, is slapped in distance
One group of vertical reinforcement support is set at the 5m in sub- face 7, and preliminary bracing is chiseled at 16 arch supporting of base tunnel, 10 position in top
Gunite concrete face layer, the supporting arch 15 of base tunnel 16 in the top and top of reinforcing support is welded, to being led in entire top
Implement strengthening supporting in hole 16；
（6）, new side-wall hole and old hole closing：
It chisels 7 position of face 5 interim arch 4 of top heading on the right side of two Pin of 16 supporting of base tunnel in top is completed and led on right side
The gunite concrete for cheating 5 interim arch, 4 jointing 2, unlocks the protective device 1 of the side jointing 2, and releases jointing
2 connection bolt removes the gib of the side base tunnel side wall 13, forms new base tunnel areole 17, in top of constructing forward
Base tunnel 16 in top after the completion of the supporting of base tunnel 16, continues the gib for removing the base tunnel side wall 13, forms a width
For the base tunnel areole 17 of 4-6m, base tunnel 16 opens a base tunnel at interval of 15-18m in 13 gib of base tunnel side wall in top
Areole 17 is closed after new base tunnel areole 17 opens up, while to a upper base tunnel areole 17, and so on,
Closing step is：The 5 interim arch 4 of right side top heading of dismounting is resetted into installation, is fixed using connection bolt, uses protective device
1 is fixed rear concrete spraying support；
（7）, in left side in base tunnel 18, right side under base tunnel 21 and left side under base tunnel 19, right side base tunnel 23 excavation supporting：
Base tunnel 16 is along in longitudinal excavation and support processes in top, on the right side of excavation supporting in base tunnel 21, when base tunnel 21 in right side
After excavation supporting is more than 15m, base tunnel 18 in excavation supporting left side can be synchronized, base tunnel 18 continues excavation supporting forward in left side,
In the case of meeting transport requirement, right side 23 excavation supporting of lower base tunnel can be implemented, when 23 excavation supporting of base tunnel is more than 15m under right side
Afterwards, base tunnel 19 can be descended on the left of excavation supporting, successively left and right, upper and lower stepped propelling construction.
（8）, 22 excavation supporting of base tunnel under base tunnel 20 and middle part in middle part；
As 23 excavation supporting 15m ~ 30m of base tunnel under base tunnel 19 under left side and right side, left side top heading 6 and right side top heading are released
The constraint of 5 main body arches 3 and interim arch 4, removes and reinforces support and interim side wall, excavates in middle part and is led under base tunnel 20 and middle part
The rock mass in hole 22 completes the closing of preliminary bracing loopful.
Claims (6)
1. a kind of construction method of double -side approach excavation supporting, it is characterized in that：Specifically include following steps：
（1）, joint protective：
After the completion of left side top heading or right side top heading supporting arch, to the main body arch of left side top heading or right side top heading
Protective device is arranged in external with the jointing of left side top heading or the interim arch of right side top heading, and on entire left side
The external spray of the main body arch of base tunnel or right side top heading, the interim arch of left side top heading or right side top heading and protective device
It penetrates concrete and completes preliminary bracing；Left side top heading and right side top heading excavate the distance that is staggered before and after tunnel longitudinal direction and are not less than
15m respectively constructs left side top heading and right side top heading 50-80m by above-mentioned measure；
（2）, left side top heading or the interim arch of right side top heading dismounting：
Previous step is connect, after left side top heading and the construction distance satisfaction transport requirement of right side top heading, base tunnel in construction left side
Or base tunnel in right side, when base tunnel is constructed in base tunnel or right side in left side, select on the left of top heading or right side top heading as applying
The work surface of work cuts left side top heading or the interim arch of right side top heading and left side top heading or right side top heading main body arch
Gunite concrete on jointing unlocks the connection bolt of protective device and jointing so that left side top heading or right side
Top heading main body arch and left side top heading or the interim arch constraint relief of right side top heading, cut jointing with lower portion
It is interim to remove top heading or the interim arch of right side top heading, left side top heading or right side top heading on the left of whole section for gunite concrete
Arch only removes two Pin every time when removing, and removes 4 ~ 6m of width in total, forms base tunnel areole, often removes on once needing to complete
It could continue to remove after base tunnel supporting construction in portion；
（3）, in top base tunnel excavation supporting：
Previous step is connect, after often removing two Pin left side top headings or the interim arch of right side top heading, using controlled blasting to top
The soil body of middle base tunnel is excavated, and when excavation with guide pit is extremely 40-60cm ranges apart from other side base tunnel side wall, manually abolishes rock
Body cuts the gunite concrete of the side jointing, unlocks protective device, by left side top heading and right side top heading main body arch
It is connected and fixed with the supporting arch of base tunnel in top, and gunite concrete, completes the supporting of base tunnel in top；
（4）, base tunnel is longitudinally constructed in top：
Previous step is connect, base tunnel carries out excavation supporting along tunnel longitudinal direction in top, constructs using controlled blasting, outermost
The distance arround holes of layer are arranged with a distance from base tunnel side wall not less than 50cm, and the hole slag slag-tapping device after excavation is from base tunnel areole
Position is transported, and supporting is completed in time after excavation；
（5）, reinforce Construction of Supporting：
Previous step is connect, when base tunnel reaches 15m~18m along tunnel longitudinal direction construction length in top, apart from area
One group of vertical reinforcement support is set at the 5m in face, and the injection coagulation of preliminary bracing is chiseled at base tunnel arch supporting position in top
Native face layer, the supporting arch of base tunnel in the top and top of reinforcing support is welded, and implements to reinforce branch to base tunnel in entire top
Shield；
（6）, new side-wall hole and old hole closing：
Chisel 7 position of face be completed on the left of two Pin of base tunnel supporting in top top heading or the interim arch of right side top heading with
The gunite concrete of left side top heading or the interim arch jointing of right side top heading unlocks the protection dress of the side jointing
It sets, and releases the connection bolt of jointing, remove the gib of the side base tunnel side wall, form new base tunnel areole, to
Base tunnel in preceding construction top in top after the completion of the supporting of base tunnel, continues the gib for removing the base tunnel side wall, forms one
A width is the base tunnel areole of 4-6m, and base tunnel opens a base tunnel at interval of 15-18m in base tunnel side wall gib in top
Areole is closed after new base tunnel areole opens up, while to a upper base tunnel areole, and so on；
（7）, in left side in base tunnel, right side under base tunnel and left side under base tunnel, right side base tunnel excavation supporting：
Base tunnel is along in longitudinal excavation and support processes in top, on the left of synchronous excavation supporting in base tunnel in base tunnel or right side, it is left
Base tunnel should longitudinally have the longitudinal separation not less than 15m along tunnel in base tunnel and right side in side, be led when in base tunnel in left side or right side
It cheats after excavation supporting is more than 15m, in the case where meeting transport and requiring, base tunnel under the lower base tunnel in implementation left side or right side can be synchronized and opened
Supporting is dug, base tunnel should longitudinally have the longitudinal separation not less than 15m along tunnel under base tunnel and right side under left side, successively left and right, up and down
Stepped propelling construction；
（8）, excavation with guide pit supporting under base tunnel and middle part in middle part；
As excavation with guide pit supporting 15m ~ 30m under base tunnel under left side and right side, left side top heading and right side top heading main body are released
The constraint of arch and interim arch removes and reinforces support and interim side wall, excavates the rock mass of base tunnel under base tunnel and middle part in middle part,
Complete the closing of preliminary bracing loopful.
2. the construction method that double -side approach according to claim 1 excavates, it is characterized in that：Step（1）In protection dress
It is set to and uses sponge wrapping and fixation in the outside of jointing；The left side top heading or right side top heading are suitable according to constructing
Sequence selects, and the two selects one first to construct, when the distance that is longitudinally staggered is more than 15m, the synchronous excavation supporting other side.
3. the construction method that double -side approach according to claim 1 excavates, it is characterized in that：Step（4）In top in
The excavation clear height of base tunnel arch is 3.5m.
4. the construction method that double -side approach according to claim 1 excavates, it is characterized in that：Step（5）In it is vertical
Reinforce support to be made of two rows of spaced reinforced steels side by side, often arranges reinforced steel and be disposed as at least four, reinforcing
The elongated steel plate of 0.5m wide is welded in shaped steel bottom, and elongated steel plate thickness 16mm is equipped at intervals with more transverse directions on multiple rows of reinforced steel
Angle steel, two adjacent angle steel it is diagonal between be equipped with the angle steel of cross-fixing, elongated steel plate bottom is placed on hard
In smooth base.
5. the construction method that double -side approach according to claim 1 excavates, it is characterized in that：Step（6）In closing step
Rapid concrete operations are：The left side top heading of dismounting or the interim arch of right side top heading are resetted into installation, fixed using connection bolt,
Rear concrete spraying support is fixed using protective device.
6. the construction method that double -side approach according to claim 1 excavates, it is characterized in that：On left side top heading or right side
The sequence of excavation of base tunnel is determined according to sequence of construction under base tunnel or right side under base tunnel, left side in base tunnel or right side in base tunnel, left side,
The two is selected first, when selecting left side, preferentially selects to lead in top heading on the left of excavation supporting, left side at top, middle part, lower part
Base tunnel under hole, left side；When selecting right side, top heading on the right side of excavation supporting, right side are preferentially selected at top, middle part, lower part
Base tunnel under middle base tunnel, right side.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823031A (en) * | 2019-11-06 | 2020-02-21 | 国网辽宁省电力有限公司大连供电公司 | Blasting construction method for shallow tunnel |
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| JPH06257398A (en) * | 1993-03-05 | 1994-09-13 | Kajima Corp | Shield tunnel having secondary lining |
| CN101858220A (en) * | 2010-05-28 | 2010-10-13 | 深圳市建设（集团）有限公司 | Tunnel double upper sidewall heading construction method |
| CN104196537A (en) * | 2014-08-26 | 2014-12-10 | 广东省建筑工程机械施工有限公司 | Construction method of three parallel metro tunnels with ultra-small clear distance |
| CN104500077A (en) * | 2014-12-10 | 2015-04-08 | 中铁二十局集团有限公司 | Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area |
| CN207080234U (en) * | 2017-04-28 | 2018-03-09 | 中国市政工程中南设计研究总院有限公司 | A kind of temporary support steelframe for bored tunnel supporting |
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2018
- 2018-04-17 CN CN201810341123.XA patent/CN108590712B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06257398A (en) * | 1993-03-05 | 1994-09-13 | Kajima Corp | Shield tunnel having secondary lining |
| CN101858220A (en) * | 2010-05-28 | 2010-10-13 | 深圳市建设（集团）有限公司 | Tunnel double upper sidewall heading construction method |
| CN104196537A (en) * | 2014-08-26 | 2014-12-10 | 广东省建筑工程机械施工有限公司 | Construction method of three parallel metro tunnels with ultra-small clear distance |
| CN104500077A (en) * | 2014-12-10 | 2015-04-08 | 中铁二十局集团有限公司 | Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area |
| CN207080234U (en) * | 2017-04-28 | 2018-03-09 | 中国市政工程中南设计研究总院有限公司 | A kind of temporary support steelframe for bored tunnel supporting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110823031A (en) * | 2019-11-06 | 2020-02-21 | 国网辽宁省电力有限公司大连供电公司 | Blasting construction method for shallow tunnel |
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