CN106761836B - Wall construction method in no middle drift multiple-arch tunnel auxiliary - Google Patents
Wall construction method in no middle drift multiple-arch tunnel auxiliary Download PDFInfo
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- CN106761836B CN106761836B CN201710061820.5A CN201710061820A CN106761836B CN 106761836 B CN106761836 B CN 106761836B CN 201710061820 A CN201710061820 A CN 201710061820A CN 106761836 B CN106761836 B CN 106761836B
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- 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
Abstract
The invention discloses wall construction methods in a kind of no middle drift multiple-arch tunnel auxiliary.Technical key point is left width tunnel top bar of first constructing, then During Initial Stage Construction supporting, excavates left width tunnel and gets out of a predicament or an embarrassing situation；Perform wall in auxiliary：Vertical steelframe of first constructing performs diagonal brace on the right side of steelframe after inverted arch corresponding position, inverted arch concrete of constructing, and performs horizontal brace steelframe；It is in quincunx fixed steel bars on steelframe；Simultaneously double layer bar is hung on horizontal brace steelframe；Then it constructs on steelframe gunite concrete, left width Tunnel Second Lining of constructing on the left of concrete；It constructs right width tunnel：First excavate top bar；Preliminary bracing is applied again；Step in excavation, step preliminary bracing in construction；Excavation is got out of a predicament or an embarrassing situation；Wall right side preliminary bracing and diagonal brace in dismounting；It constructs right width tunnel inverted arch；It finally constructs right width Tunnel Second Lining.The present invention cancels middle drift construction, ensure that main hole construction safety, makes full use of existing construction method, improves construction efficiency, reduces the duration.
Description
Technical field
The invention belongs to the construction methods of multiple-arch tunnel in the Tunnel Engineering field of civil engineering, and in particular in a kind of nothing
Wall construction method in pilot tunnel multiple-arch tunnel auxiliary.
Background technology
In Tunnel Engineering, since place and circuit limit, usually using multiple-arch tunnel, (multiple-arch tunnel refers to that left and right is parallel
Tunnel shares a middle wall).Currently, common construction method is middle drift of first constructing, then main hole of constructing, this method construction technology
The middle wall construction of complexity, inconvenience of slagging tap, while middle drift is connect with main hole there is also more problem, as the presence of middle drift can shadow
Ring the excavation efficiency in main hole；In the preliminary bracing work progress in main hole, construction personnel Yi Fasheng steps on sky accident；Meanwhile in master
There are weak spots in the connection of wall in the supporting in hole and middle drift, for example when branch at the beginning of main hole is constructed, tie point waterproof technology is multiple
Miscellaneous, difficulty is larger；Middle drift vault such as fills leakiness, easily causes main hole and just props up larger bias etc..Therefore, it is necessary to develop
A kind of construction technology is simpler, the Multi-arch Tunnel Construction method for going wrong less.
Invention content
The purpose of the present invention is to provide a kind of construction technologies relatively simply, go wrong less no middle drift multiple-arch tunnel
Wall construction method in auxiliary.
The purpose of the present invention is by the following technical solutions to realize：
Wall construction method during this is assisted without middle drift multiple-arch tunnel, includes the following steps：
(1) the i.e. leading hole in left width tunnel is first excavated；The sequence of construction in left width tunnel is：It first constructs top bar, using routine
Construction method；During Initial Stage Construction supporting again, the position of wall in Design assistant need embedding built-in fitting in supporting in the early stage, after convenient
Phase construction connection；Preliminary bracing is carried out with after built-in fitting, left width tunnel is excavated and gets out of a predicament or an embarrassing situation；
(2) wall in the auxiliary on the right side of left width tunnel is performed；First along tunnel, axially the vertical steelframe of construction I18 types is corresponded in inverted arch
Position, the vertical steelframe spacing of I18 types are consistent with left width Tunnel steelframe spacing；Then construction inverted arch concrete, it is fixed
The vertical steelframe of I18 types；After fixing the vertical steelframe of I18 types, the diagonal brace on the right side of the vertical steelframe of I18 types is performed, while correspondence is applied
Do the I18 type horizontal brace steelframes of the vertical steelframe of I18 types；After steelframe erects, in quincunx fixed vertical in tunnel on steelframe
22 reinforcing bars of φ of road wall；8 double layer bars of φ are hung on I18 type horizontal brace steelframes simultaneously；Then it constructs and sprays on steelframe
The concrete of thickness 25cm or more, after wall construction of shotcrete is completed in auxiliary, in the left side of 25cm or more concrete
Thickness construct as the left width Tunnel Second Lining of 60cm or more, so far leading hole construction is completed；
(3) the right width tunnel holes Ji Houhang of construction；The corresponding section construction in right width tunnel is constructed in leading hole to be completed and along tunnel
It advances 30~50m axially forward to start to construct later, the sequence of construction in rear row hole is：First excavate top bar；Correspondence is applied again
Preliminary bracing；Then step in excavating, step preliminary bracing in corresponding construction；It excavates and gets out of a predicament or an embarrassing situation again；Then it removes in leading hole
Preliminary bracing on the right side of wall and diagonal brace；Row hole inverted arch after dismounting is constructed after finishing；The secondary lining in row hole after finally constructing；Extremely
Hereafter row hole construction is completed.
Specifically, in step (1), the region that the top bar is 1.6 meters or more on design basis line, it is described get out of a predicament or an embarrassing situation for
1.6 meters of regions below on design basis line；In step (3), the top bar is the first half of design basis line area above
Point, the middle step is the lower half portion of design basis line area above, described to get out of a predicament or an embarrassing situation as design basis line region below.
Specifically, in step (2), the spacing of the vertical steelframe of the I18 types is 80cm；The I18 types horizontal brace steelframe
It is 4, spacing 150cm；22 bar spacings of φ perpendicular to tunnel wall are in 1.5m × 0.8m quincuncial arrangements, and welding is solid
Due on steelframe；The specification of 8 double layer bars of the φ is 20cm × 20cm.
Specifically, the construction injection concrete thickness on steelframe is 25cm, the left width Tunnel Second Lining thickness
For 60cm, the rear row hole secondary lining thickness is 55cm；Therefore, middle wall thickness be 140cm.
Construction method of the present invention eliminates middle drift construction, directly excavates main hole, is arranged when excavating leading hole and constructing auxiliary
Zhong Qiang is helped, wall forms skeleton by I18 shaped steel in the auxiliary, and fill-before-fire concrete filling is at wall, and wall can be in leading hole in auxiliary
When construction secondary lining, two lining template actions are provided, can once press the leading lining of hole side two of wall during design requirement molding shares, together
The lining of Shi Hou rows hole two is not finished into before, can be used for resisting leading hole bias, is pacified when row hole construction secondary lining after guarantee
Entirely, middle drift construction can be cancelled by the setting of wall in auxiliary, and ensure that the construction safety in main hole, can made full use of existing
Construction method, improve construction efficiency, reduce the duration.
Description of the drawings
Fig. 1 is the integral construction structural schematic diagram of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of wall part in being assisted in Fig. 1.
Fig. 3 shows for the vertical steelframe of wall I18 types in the auxiliary of the embodiment of the present invention and I18 type horizontal brace steelframe part-structures
It is intended to.
Fig. 4 be the embodiment of the present invention auxiliary in 22 reinforcing bar quincuncial arrangement schematic diagrames of wall φ.
Fig. 5 be the embodiment of the present invention auxiliary in 8 double layer bars of wall φ plan view.
Fig. 6 is that the embodiment of the present invention excavates structural schematic diagram after molding.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.
Referring to Fig. 1 to Fig. 6, in figure left width tunnel 1 be leading hole, right width tunnel 2 be after row hole, 3 for auxiliary in wall.In figure
Institute's dimensioning unit is cm.
Wall construction procedure is as follows during the present embodiment is assisted without middle drift multiple-arch tunnel：
Left width tunnel 1 is first excavated, left 1 sequence of construction of width tunnel is：(top bar 4 is design basis line to top bar 4 of first constructing
1.6 meters or more of region on 5), using conventional construction method；During Initial Stage Construction supporting 6 again pays attention to the wall 3 in Design assistant
Position needs embedding built-in fitting in supporting in the early stage 6, construction in later period is facilitated to connect；Preliminary bracing 6 is carried out with after built-in fitting, is opened
Dig 7 (the getting out of a predicament or an embarrassing situation 7 as 1.6 meters of regions below on design basis line 5) of getting out of a predicament or an embarrassing situation in left width tunnel 1；Wall 3 in auxiliary is performed,
Wall 3 is as shown in Figure 2 in auxiliary.
The vertical steelframe of I18 types 301 of first constructing of wall 3 stands on inverted arch corresponding position in auxiliary, between the vertical steelframe of I18 types 301
It is 80cm away from consistent with leading hole preliminary bracing steelframe, inverted arch concrete eight of then constructing fixes the vertical steelframe of I18 types 301
Later, it is corresponded to while diagonal brace 9 for performing vertical 301 right side of steelframe of I18 types and performs I18 type horizontal braces steelframe 302 4,
The spacing of I18 type horizontal braces steelframe 302 chooses 150cm, as shown in Figure 3.
It is pre-buried on steelframe after above-mentioned steelframe (the vertical steelframe 301 of I18 types and I18 type horizontal braces steelframe 302) erects
Perpendicular to 22 reinforcing bars 303 of φ of tunnel wall, spacing 1.5m × 0.8m quincuncial arrangements, as shown in Figure 4.In Fig. 4, left and right arrow
Direction is that tunnel is axial.Meanwhile 8 double layer bars 304 of φ, size 20cm are hung on I18 type horizontal braces steelframe 302
× 20cm, as shown in Figure 5.
Then construction gunite concrete (C30 jetting cements), thickness 25cm, when 3 construction of shotcrete of wall is complete in auxiliary
At the secondary lining 10 in left width tunnel 1 of later, constructing, 19 thickness of secondary lining is 60cm, and so far leading hole construction is completed.
Next row hole after construction, i.e., right width tunnel 2 shown in FIG. 1, the corresponding section construction in rear row hole should be applied in leading hole
Work is completed and advances axially forward along tunnel to construct after 30~50m.Row hole sequence of construction is afterwards：First excavate top bar
11 (top bar 11 is the top half of 5 area above of design basis line), then apply 11 corresponding initial stage of 2 top bar of right width tunnel
Supporting 12；Then step 13 (middle step 13 is the lower half portion of 5 area above of design basis line) in excavating, corresponding right width of constructing
The preliminary bracing 14 of step 13 in tunnel 2；15 (getting out of a predicament or an embarrassing situation 15 as 5 region below of design basis line) of getting out of a predicament or an embarrassing situation are excavated again, are connect
It and removes corresponding preliminary bracing 6 and leading hole diagonal brace 9 on the right side of leading hole, construction inverted arch 16, finally constructs after dismounting finishes
The secondary lining 17 in row hole afterwards, 17 thickness of secondary lining are 55cm；It constructs and completes to hereafter row hole.Therefore, middle wall thickness is yes
140cm.It is as shown in Figure 6 to excavate no middle drift multiple-arch tunnel after molding.
Claims (4)
1. wall construction method in a kind of no middle drift multiple-arch tunnel auxiliary, it is characterised in that include the following steps：
（1）First excavate the i.e. leading hole in left width tunnel；The sequence of construction in left width tunnel is：It first constructs top bar, using conventional construction
Method；During Initial Stage Construction supporting again, the position of wall in Design assistant need embedding built-in fitting in supporting in the early stage, the later stage are facilitated to apply
Work connects；Preliminary bracing is carried out with after built-in fitting, left width tunnel is excavated and gets out of a predicament or an embarrassing situation；
（2）Perform wall in the auxiliary on the right side of left width tunnel；First along tunnel, axially the vertical steelframe of construction I18 types corresponds to position in inverted arch
It sets, the vertical steelframe spacing of I18 types is consistent with left width Tunnel steelframe spacing；Then construction inverted arch concrete, fixed I18
The vertical steelframe of type；After fixing the vertical steelframe of I18 types, the diagonal brace on the right side of the vertical steelframe of I18 types is performed, while correspondence performs
The I18 type horizontal brace steelframes of the vertical steelframe of I18 types；After steelframe erects, in quincunx fixed vertical in tunnel on steelframe
22 reinforcing bars of φ of wall；8 double layer bars of φ are hung on I18 type horizontal brace steelframes simultaneously；Then construction injection is thick on steelframe
The concrete for spending 25cm or more, after wall construction of shotcrete is completed in auxiliary, the thickness for injection of constructing on steelframe
The left width Tunnel Second Lining that the left side construction thickness of 25cm or more concrete is 60cm or more, so far leading hole construction are completed；
（3）It constructs the right width tunnel holes Ji Houhang；The corresponding section construction in right width tunnel is constructed in leading hole to be completed and along tunnel axial direction
It has pushed ahead 30 ~ 50m to start to construct later, the sequence of construction in rear row hole is：First excavate top bar；Corresponding initial stage branch is applied again
Shield；Then step in excavating, step preliminary bracing in corresponding construction；It excavates and gets out of a predicament or an embarrassing situation again；Then it removes in leading hole on the right side of wall
Preliminary bracing and diagonal brace；Row hole inverted arch after dismounting is constructed after finishing；The secondary lining in row hole after finally constructing；To hereafter going
Hole construction is completed.
2. wall construction method in no middle drift multiple-arch tunnel auxiliary according to claim 1, it is characterised in that：Step（1）
In, the region that the top bar is 1.6 meters or more on design basis line is described to get out of a predicament or an embarrassing situation as 1.6 meters or less on design basis line
Region；Step（3）In, the top bar is the top half of design basis line area above, and the middle step is design base
The lower half portion of directrix area above, it is described to get out of a predicament or an embarrassing situation as design basis line region below.
3. wall construction method in no middle drift multiple-arch tunnel auxiliary according to claim 1, it is characterised in that：Step（2）
In, the spacing of the vertical steelframe of the I18 types is 80cm；The I18 types horizontal brace steelframe is 4, spacing 150cm；It is described
22 bar spacings of φ perpendicular to tunnel wall are in 1.5m × 0.8m quincuncial arrangements, are fixedly welded on steelframe；The φ 8 is double-deck
The specification of bar-mat reinforcement is 20cm × 20cm.
4. wall construction method in no middle drift multiple-arch tunnel auxiliary according to claim 1, it is characterised in that：It is described in steel
Construction injection concrete thickness is 25cm on frame, and the left width Tunnel Second Lining thickness is 60cm, the secondary lining in the rear row hole
Block thickness is 55cm；Therefore, middle wall thickness be 140 cm.
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| CN201710061820.5A CN106761836B (en) | 2017-01-26 | 2017-01-26 | Wall construction method in no middle drift multiple-arch tunnel auxiliary |
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| CN106761836B true CN106761836B (en) | 2018-08-03 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266191B (en) * | 2018-01-17 | 2019-08-27 | 中铁隆工程集团有限公司 | A kind of multiple-arch tunnel optimized construction method |
| CN108222977B (en) * | 2018-02-02 | 2024-03-22 | 中交三航局第三工程有限公司 | Screw thread rib positioning and reinforcing device and installation method thereof |
| CN111022060B (en) * | 2019-12-26 | 2021-03-23 | 中交三公局第二工程有限公司 | Single-hole excavation construction method of double-arch tunnel |
| CN111810187B (en) * | 2020-07-20 | 2022-05-06 | 中国路桥工程有限责任公司 | Urban non-center pilot tunnel bifurcation tunnel turning construction method |
| CN112177616B (en) * | 2020-11-13 | 2022-05-31 | 贵州大学 | Method for laying steel frame of multi-arch tunnel without middle pilot tunnel |
| CN113417667A (en) * | 2021-07-21 | 2021-09-21 | 四川公路桥梁建设集团有限公司 | Method for simply excavating and supporting multi-arch tunnel without pilot tunnel |
| CN113931660B (en) * | 2021-10-25 | 2024-04-09 | 四川省交通建设集团股份有限公司 | Reserved single-side-wall soil column method suitable for pilot tunnel-free method of multi-arch tunnel |
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| JPH0734791A (en) * | 1993-07-23 | 1995-02-03 | Shimizu Corp | Lining method for shield tunneling work |
| CN204152527U (en) * | 2014-10-13 | 2015-02-11 | 中铁二院重庆勘察设计研究院有限责任公司 | The combined type preliminary bracing system of wall multiple-arch tunnel in implicit expression |
| CN104405402A (en) * | 2014-10-13 | 2015-03-11 | 中铁二院重庆勘察设计研究院有限责任公司 | Symmetric middle separation wall construction method for hidden type middle wall multi-arch tunnel |
| CN104612704A (en) * | 2015-01-08 | 2015-05-13 | 云南省交通规划设计研究院 | Middle-wall-free multi-arch tunnel |
| CN105275472A (en) * | 2015-11-13 | 2016-01-27 | 河北科技师范学院 | Construction method of multi-arch tunnel without middle wall |
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2017
- 2017-01-26 CN CN201710061820.5A patent/CN106761836B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734791A (en) * | 1993-07-23 | 1995-02-03 | Shimizu Corp | Lining method for shield tunneling work |
| CN204152527U (en) * | 2014-10-13 | 2015-02-11 | 中铁二院重庆勘察设计研究院有限责任公司 | The combined type preliminary bracing system of wall multiple-arch tunnel in implicit expression |
| CN104405402A (en) * | 2014-10-13 | 2015-03-11 | 中铁二院重庆勘察设计研究院有限责任公司 | Symmetric middle separation wall construction method for hidden type middle wall multi-arch tunnel |
| CN104612704A (en) * | 2015-01-08 | 2015-05-13 | 云南省交通规划设计研究院 | Middle-wall-free multi-arch tunnel |
| CN105275472A (en) * | 2015-11-13 | 2016-01-27 | 河北科技师范学院 | Construction method of multi-arch tunnel without middle wall |
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