CN205277435U - Secretly dig construction of big section tunnel and strut system - Google Patents
Secretly dig construction of big section tunnel and strut system Download PDFInfo
- Publication number
- CN205277435U CN205277435U CN201620051722.4U CN201620051722U CN205277435U CN 205277435 U CN205277435 U CN 205277435U CN 201620051722 U CN201620051722 U CN 201620051722U CN 205277435 U CN205277435 U CN 205277435U
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- tunnel
- arch
- digging pile
- little pilot
- 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.)
- Active
Links
Abstract
The utility model provides a secretly dig construction of big section tunnel and strut system, includes that the little pilot tunnel of hunch portion, manual hole digging pile, core dike, steel pipe support and the shaped steel longeron, the little pilot tunnel of hunch portion is located center department of tunnel hunch portion, sets up manual hole digging pile in the little pilot tunnel of hunch portion, the manual hole digging pile bottom is located core dike top, the steel pipe supports and runs through perpendicularly the little pilot tunnel of manual hole digging pile and hunch portion, the shaped steel longeron support in the steel pipe supports between top and the little pilot tunnel vault of hunch portion. The utility model discloses support with the great steel pipe of rigidity and regard as tunnel vault vertical braces architecture, support in the first zhi zhongxin department of vault to effectual control vault secondary settlement, what little pilot tunnel and manual hole digging pile formed faces empty, has reduced the adverse effect that the blasting was supported to the steel pipe, but recycle after the steel pipe supports and the shaped steel longeron encircles in the tunnel, wall secondary lining finishes has practiced thrift construction cost.
Description
Technical field
The utility model relates to technical field of tunnel construction, is specifically related to a kind of tunneling large cross-section tunnel construction supporting system.
Background technology
In recent years, along with the fast development of transportation, railway, highway, subway etc. are built and are achieved proud achievement, and the transportation network thus formed is day by day intensive, its coverage expands day by day. Therefore, the exploitation of the underground space is more and more by builders are paid attention to, and wherein tunnel construction technology is always for builders break one of important topic of exploration. In constructing tunnel process, adopt different operating techniquies because of different rock mass, and traditional lithostratigraphy large cross-section tunnel adopts two side-wall pilot tunnel to construct mostly.
Two side-wall pilot tunnel is constructed, and is that section is divided into arranged on left and right sides base tunnel and intercooler core soil three parts, and then first two rear flank are middle excavates successively, and as shown in Figure 1, its construction procedure is as follows:
Step 1: right upper portion excavation with guide pit, initial stage supporting;
Step 2: right side central excavation with guide pit, initial stage supporting;
Step 3: lower right side excavation with guide pit, initial stage supporting;
Step 4: left upper portion excavation with guide pit, initial stage supporting;
Step 5: left side central portion excavation with guide pit, initial stage supporting;
Step 6: left lower excavation with guide pit, initial stage supporting;
Step 7: Zhong Dong top soil (rock) body excavates, initial stage supporting;
Step 8: lay waterproof layer, builds tunnel arch, wall two lining cutting and internal structure;
Step 9: soil (rock) body excavation in the middle part of middle hole;
Step 10: Zhong Dong bottom soil (rock) body excavates;
Step 11: lay inverted arch waterproof layer, builds inverted arch concrete.
Two side-wall pilot tunnel construct in support system form closed hoop along each piecemeal excavation face skeletal lines before this, along with progressively construction progress, final form the closed support system of tunneling boring. The support time of this constructional method is longer, and the control difficulty of formation distortion and arch sedimentation is bigger; Free face amasss little, and explosion is avoided being damaged by intercooler core soil, and working security is general; More temporary supporting, makes again its construction cost higher.
Practical novel content
For above-mentioned prior art Problems existing, the utility model provides a kind of tunneling large cross-section tunnel construction supporting system, this support system can effectively control arch sedimentation, bigger free face reduces the destruction that arch, tunnel is supported by explosion, ensure construction safety, and its supporting component recoverable, thus reduce construction cost.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of tunneling large cross-section tunnel construction supporting system, comprise the little pilot tunnel in arch, artificial digging pile, core dike, steel pipe support and section longitudinal beam, the little pilot tunnel in described arch is positioned at center, arch, tunnel, in the little pilot tunnel in arch, artificial digging pile is set, core dike top it is positioned at bottom described artificial digging pile, described steel pipe supports and vertically runs through the little pilot tunnel of described artificial digging pile and arch, and described section longitudinal beam is supported between the little pilot tunnel vault of described steel pipe support top end and arch.
During construction, excavating little pilot tunnel in arch central upper, the interior manual digging pile construction of little pilot tunnel, then supported by steel pipe and transfer in artificial digging pile, then set up section longitudinal beam in steel pipe support top end, little pilot tunnel vault is supported and section longitudinal beam supporting by steel pipe.
In the utility model, steel pipe support stiffness is relatively big, and is supported in a center at the beginning of vault, thus effectively controls vault two sedimentations; The free face that little pilot tunnel and artificial digging pile are formed, reduces the disadvantageous effect that steel pipe is supported by explosion; Steel pipe supports and section longitudinal beam recoverable after tunnel arch, wall two lining cutting, has saved construction cost.
Further, described lithostratigraphy tunneling large cross-section tunnel construction supporting structure also comprises isolated footing, and described isolated footing is positioned at bottom described artificial digging pile, supports for supporting described steel pipe. The core wall by isolated footing the load that arch steel pipe supports being transmitted under artificial digging pile, it is not necessary to the fixing steel pipe of piling supports, and therefore working procedure is less, and saves construction cost.
Further, described artificial digging pile inwall and described steel pipe are filled with coarse sand between supporting, and are conducive to reducing blast-shaking speed, reduce the destruction that steel pipe is supported by explosion, ensure that steel pipe supports the supporting role to arch.
Further, described lithostratigraphy tunneling large cross-section tunnel construction supporting structure also comprises steelframe spray concrete, core dike two side described in the spray concrete supporting of described steelframe, by the spray concrete control core dike distortion of the steelframe of two side, ensure that steel pipe is supported with stable ground, ensure construction safety.
Further, described tunneling large cross-section tunnel construction supporting system also comprises Counter-pulled bolts, and described Counter-pulled bolts connects the steelframe spray concrete of described core storage dike two side, thus adds because of core dike further, thus effectively controls vault two sedimentations.
Further, described tunneling large cross-section tunnel construction supporting system also comprises the supporting of side wall initial stage, and described side wall initial stage supporting is by horizontal stull and side wall bolt anchorage, and effectively the lateral deformation of control tunnel sidewalls, ensures construction safety.
Further, described tunneling large cross-section tunnel construction supporting system also comprises inverted arch, described inverted arch is provided with groove with described side wall initial stage supporting junction, embedding bottom described side wall initial stage supporting it is fixed in described groove, the lateral slip distortion of control tunnel sidewalls, reduces construction safety hidden danger further.
The beneficial effects of the utility model:
(1), steel pipe support stiffness relatively greatly, and is supported in a center at the beginning of vault, thus effectively controls vault two sedimentations;
(2), the free face that formed of little pilot tunnel and artificial digging pile, reduce the disadvantageous effect that steel pipe is supported by explosion;
(3), steel pipe support and section longitudinal beam at tunnel arch, recoverable after wall two lining cutting, saved construction cost.
Accompanying drawing explanation
Accompanying drawing 1 is executed formula for two side-wall pilot tunnel and is walked sequence sectional view;
A kind of enforcement mode structural representation of accompanying drawing 2 the utility model.
In figure: the little pilot tunnel in 1-arch, 2-artificial digging pile, 3-core dike, 4-steel pipe supports, 5-section longitudinal beam, 6-isolated footing, 7-coarse sand, 8-steelframe spray concrete, 9-Counter-pulled bolts, 10-side wall initial stage supporting, the horizontal stull of 11-, 12-side wall anchor pole, 13-inverted arch, 14-groove.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but enforcement mode of the present utility model is not limited to this.
Embodiment:
As shown in Figure 2, a kind of tunneling large cross-section tunnel construction supporting system, comprise the little pilot tunnel 1 in arch, artificial digging pile 2, core dike 3, steel pipe supports 4, section longitudinal beam 5 and isolated footing 6, the little pilot tunnel 1 in described arch is positioned at center, arch, tunnel, in the little pilot tunnel 1 in arch, artificial digging pile 2 is set, core dike 3 top it is positioned at bottom described artificial digging pile 2, described isolated footing 6 is positioned at bottom described artificial digging pile 2, supporting steel pipe supports 4, it is vertical through in the little pilot tunnel 1 of described artificial digging pile 2 and arch that described steel pipe supports 4, it is 3m��6m that steel pipe supports 4 longitudinal spacing, section longitudinal beam 5 is supported in described steel pipe and supports between little pilot tunnel 1 vault of 3 tops and arch, described artificial digging pile 2 inwall and described steel pipe are filled with coarse sand 7 between supporting 4.
Above-mentioned support system also comprises the horizontal stull 11 for reinforcing side wall initial stage supporting 10 and side wall anchor pole 12, and is arranged at core dike two side for reinforcing steelframe spray concrete 8 and the Counter-pulled bolts 9 of core dike. In addition, inverted arch 13 is provided with groove 14 with described side wall initial stage supporting 10 junction, embedding bottom described side wall initial stage supporting 10 it is fixed in described groove 14.
In above-mentioned support system, the node connection of steel pipe support 4, section longitudinal beam 5 and isolated footing 6 should be firm, section longitudinal beam 5 should ensure closely connected with the initial stage supporting of the little pilot tunnel in arch 1, and steel pipe support 4, section longitudinal beam 5 and isolated footing 6 are jointly as tunnel vault just Zhi Wending, reliably bearing; Core dike 3 supports the ground of 4 as steel pipe, should ensure that it has reliability and stability, increases, by pre-arranged layer smooth blasting, the empty eye damping of periphery solid matter, excavation face, comprehensive cushion techniques such as beating damping hole, to reduce explosion vibration effect, and protection core dike 3.
In the utility model, steel pipe supports 4 rigidity relatively greatly, and is supported in a center at the beginning of vault, thus effectively controls vault two sedimentations; The free face that the little pilot tunnel 1 in arch and artificial digging pile 2 are formed, reduces the disadvantageous effect that steel pipe is supported 4 by explosion; Steel pipe supports 4 and the vertical 5 beams recoverable after arch, tunnel, side wall two lining cutting of shaped steel, save construction cost: by isolated footing 6, arch steel pipe supported the core dike 3 that the load of 4 is transmitted under artificial digging pile 2, without the need to driving piles, fixing steel pipe supports 4, therefore working procedure is less, and saves construction cost; Fill coarse sand 7 between artificial digging pile 2 inwall and described steel pipe support 4, be conducive to reducing blast-shaking speed, reduce the destruction that steel pipe is supported 4 by explosion, ensure that steel pipe support 4 is to the supporting role of arch; It is out of shape by steelframe spray concrete 8 and Counter-pulled bolts 9 control core dike 3, ensures that steel pipe supports 4 and has stable ground, ensure construction safety; Side wall initial stage supporting 10 is reinforced, effectively the lateral deformation of control tunnel sidewalls by horizontal stull 11 and side wall anchor pole 12; Embedding bottom side wall initial stage supporting 10 it is fixed in bottom inverted arch 13 with, in the groove 14 of side wall initial stage supporting 10 junction, further the lateral slip distortion of control tunnel sidewalls, reduces construction safety hidden danger.
As mentioned above, it is necessary, then can well realize the utility model.
Claims (7)
1. a tunneling large cross-section tunnel construction supporting system, it is characterized in that: comprise the little pilot tunnel in arch (1), artificial digging pile (2), core dike (3), steel pipe supports (4) and section longitudinal beam (5), the little pilot tunnel in described arch (1) is positioned at center, arch, tunnel, artificial digging pile (2) is set in the little pilot tunnel in arch (1), described artificial digging pile (2) bottom is positioned at core dike (3) top, described steel pipe supports (4) and vertically runs through described artificial digging pile (2) and arch little pilot tunnel (1), described section longitudinal beam (5) is supported in described steel pipe and supports between (4) top and arch little pilot tunnel (1) vault.
2. tunneling large cross-section tunnel construction supporting system according to claim 1, it is characterised in that: also comprising isolated footing (6), described isolated footing (6) are positioned at bottom described artificial digging pile (2), support described steel pipe support (4).
3. tunneling large cross-section tunnel construction supporting system according to claim 1, it is characterised in that: described artificial digging pile (2) inwall and described steel pipe support and are filled with coarse sand (7) between (4).
4. tunneling large cross-section tunnel construction supporting system according to the arbitrary item of claims 1 to 3, it is characterised in that: also comprise steelframe spray concrete (8), core dike (3) two side described in spray concrete (8) supporting of described steelframe.
5. tunneling large cross-section tunnel construction supporting system according to claim 4, it is characterised in that: also comprising Counter-pulled bolts (9), described Counter-pulled bolts (9) connects steelframe spray concrete (8) of described core dike (3) two side.
6. tunneling large cross-section tunnel construction supporting system according to the arbitrary item of claims 1 to 3, it is characterised in that: also comprising side wall initial stage supporting (10), described side wall initial stage supporting (10) is reinforced by horizontal stull (11) and side wall anchor pole (12).
7. tunneling large cross-section tunnel construction supporting system according to claim 6, it is characterized in that: also comprise inverted arch (13), above described side wall initial stage supporting (10) junction being provided with groove (14) at described inverted arch (13), described side wall initial stage supporting (10) bottom is embedding to be fixed in groove (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620051722.4U CN205277435U (en) | 2016-01-20 | 2016-01-20 | Secretly dig construction of big section tunnel and strut system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620051722.4U CN205277435U (en) | 2016-01-20 | 2016-01-20 | Secretly dig construction of big section tunnel and strut system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205277435U true CN205277435U (en) | 2016-06-01 |
Family
ID=56062018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620051722.4U Active CN205277435U (en) | 2016-01-20 | 2016-01-20 | Secretly dig construction of big section tunnel and strut system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205277435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023308A (en) * | 2017-05-27 | 2017-08-08 | 中国水利水电第四工程局有限公司 | A kind of hard rock large cross-section tunnel construction supporting structure and construction method |
-
2016
- 2016-01-20 CN CN201620051722.4U patent/CN205277435U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023308A (en) * | 2017-05-27 | 2017-08-08 | 中国水利水电第四工程局有限公司 | A kind of hard rock large cross-section tunnel construction supporting structure and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106337686B (en) | Three layers of subway station canopy structure of rocky stratum tunneling and construction method | |
| CN101338678B (en) | Supporting arch hidden digging top-down construction method | |
| CN105604576B (en) | A kind of soft rock strata tunneling large-section tunnel construction method | |
| CN102758632B (en) | Rock stratum double initial support layering method for establishing large-scale underground structure | |
| CN107558494B (en) | Underground station structure for rail transit and construction method thereof | |
| CN111411993A (en) | Large-section tunnel supporting system penetrating through huge karst cave hall and construction method | |
| CN109853399B (en) | Large-section inclined tunnel type arch support structure for arch bridge and construction method thereof | |
| CN105064397A (en) | Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation | |
| CN205532615U (en) | Super large section tunnel excavates structure | |
| CN104532868A (en) | Anchored high bearing platform grouped pile foundation building method for high-steep deformation slope area bridge | |
| CN102410031B (en) | Underground space structure constructed by pile wall construction method | |
| CN105089670A (en) | Construction method for enlarging and excavating subway station on basis of parallel interval shield tunnel | |
| CN112922646B (en) | Building method of underground excavation station excavated by large-section single-span support through superposed arch-wall integrated type | |
| CN104131566A (en) | Method for constructing basement foundation pit without horizontal braces | |
| CN205277435U (en) | Secretly dig construction of big section tunnel and strut system | |
| CN105386779A (en) | Arch column method for building large-scale underground structure in shallow buried rock stratums | |
| CN109973122A (en) | A kind of tunnel reinforcement control method of wall rock loosening or soft rock large deformation | |
| CN111441794B (en) | Underground excavation construction method and structure for rebuilding existing tunnel into double-layer tunnel | |
| CN212508352U (en) | Shield tunnel expands system of digging based on center pillar and inverted arch | |
| CN212404803U (en) | Tunnel inverted arch combined type cableway bridge abutment | |
| CN209838435U (en) | Unloading arch backfill structure for penetrating through large-sized non-filling karst cave tunnel | |
| CN210002410U (en) | ring frame support enclosure system capable of being used as retaining wall | |
| CN114635709A (en) | Non-span-reducing construction method and construction structure for super-large-section shallow-buried subway station | |
| CN110792449B (en) | Rapid underground excavation construction method for large-span shallow tunnel | |
| CN116066151B (en) | Quick-assembly high-strength yielding pier column supporting technology for gob-side entry retaining roadside support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |