CN206830195U - Construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock - Google Patents
Construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock Download PDFInfo
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- CN206830195U CN206830195U CN201720490494.5U CN201720490494U CN206830195U CN 206830195 U CN206830195 U CN 206830195U CN 201720490494 U CN201720490494 U CN 201720490494U CN 206830195 U CN206830195 U CN 206830195U
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Abstract
The utility model discloses a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock to coordinate construction section, the region of inner side including the preliminary excavation hole body formed positioned at the pilot tunnel of upper left side first, the second pilot tunnel positioned at upper right side and the 3rd pilot tunnel positioned at lower right side, described the first pilot tunnel, the second pilot tunnel and the 3rd pilot tunnel is region to be dug.Temporary support is provided between described the first pilot tunnel and the second pilot tunnel, the upper end of the temporary support is fixedly connected with steel arch-shelf, and the lower end of the temporary support is inserted into region to be dug.It is the inclined-plane with certain slope α between the 3rd described pilot tunnel and region to be dug, and spray-up supporting is provided with described inclined-plane.The section piecemeal it is few, it is necessary to temporary support it is also few, not only increase the safety coefficient of construction, and shorten construction period.
Description
Technical field
A kind of tunnel excavation method is the utility model is related to, specifically a kind of car of single hole four for being applied to III grade of country rock
Construction section is coordinated by tunnel branch in road.
Background technology
As the development of national economy and the input of national basis Facilities Construction increasingly increase, China's transport development scale
Be in growing trend with speed, at the same time, tunnel due to ecological-environment differention it is smaller, build up after by mud-rock flow, cunning
The Effect of Natural Disaster such as slope, earthquake are small, increasingly favored by transport development.
Due to the sharp increase of the magnitude of traffic flow, highway tunnel with four lanes is more and more in newly built tunnels and reorganization and expansion tunnel, Four-Lane Road
Tunnel span is big, and for even up to 20m with upper span, therefore in III grade of country rock, wall rock condition is preferable, due to section span
Greatly, be present greater risk in the conventional benching tunnelling method construction of III grade of country rock, reflected by multiple project Monitoring During The Access data, country rock
Deform larger, the risk of fall be present.And the CD methods construction of use then speed of application be greatly reduced, be long in time limit, cost it is higher,
It is primarily present following problem：(1) technique is cumbersome, and speed of application is slow, it is necessary to the repeatedly application and dismounting of temporary support；(2)
Each several part construction influences each other restrictions, and each several part construction can not be coordinated to carry out, and top bar when constructing of getting out of a predicament or an embarrassing situation can not construct substantially,
More drag slow construction speed；(3) construction cost is higher, including cost of labor and material cost, complex process, temporary support compared with
More, duration increase both increases tunnel construction cost；(4) because the construction period is grown, traffic congestion caused by being closed a road to traffic around work area
And built environment pollution problem increase.
According to engineering experience and statistics, between the 60m/ months~70m/ months, benching tunnelling method speed of application exists CD speed of applications
Or so 100m/ months, although benching tunnelling method speed of application is significantly faster than that CD methods, working security is difficult to ensure that.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of association of single-hole with four lanes tunnel branch for being applied to III grade of country rock
Adjust construction section, the section piecemeal it is few, it is necessary to temporary support it is also few, not only increase the safety coefficient of construction, and shorten
Construction period.
The technical scheme in the invention for solving the technical problem is：
Construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock, including positioned at upper left side first
Pilot tunnel, the second pilot tunnel positioned at upper right side and the 3rd pilot tunnel positioned at lower right side, the first described pilot tunnel, the second pilot tunnel and the 3rd
The region of the inner side for the preliminary excavation hole body that pilot tunnel is formed is region to be dug；
Temporary support, the upper end of the temporary support and steel arch-shelf are provided between described the first pilot tunnel and the second pilot tunnel
It is fixedly connected, the lower end of the temporary support is inserted into region to be dug；
It is the inclined-plane with certain slope α between the 3rd described pilot tunnel and region to be dug, and is set on described inclined-plane
There is spray-up supporting.
Further, the curved lateral wall of first pilot tunnel and the second pilot tunnel it is curved on be injected with concrete spray
Layer, the inside of the lateral wall of first pilot tunnel and the second pilot tunnel is radial to have assigned some system anchor bolts, described
Concrete spray coating, first pilot tunnel, the second pilot tunnel and the 3rd are injected with the lateral wall in perpendicular shape of 3rd pilot tunnel
The first steel arch-shelf, the second steel arch-shelf and the 3rd linearly steel arch-shelf are fixedly installed in the concrete spray coating of pilot tunnel respectively,
And described the first steel arch-shelf, the second steel arch-shelf and the 3rd steel arch-shelf joins end to end successively, described steel arch-shelf is formd；
Further, and the gradient α on inclined-plane is 1 on the right side of the region to be dug：0.2-1：0.75.
Further, distance M is less than or equal to 15m, second pilot tunnel and between first pilot tunnel and the second pilot tunnel
The distance between three pilot tunnels N is less than or equal to 10m, and the distance between the 3rd pilot tunnel and region to be dug P are less than or equal to 10m.
Further, the width L of the 3rd pilot tunnel upper end is 5-7 rice, and the width Q of the upper end in the region to be dug is
12-14 rice.
Further, the height h of first pilot tunnel and the second pilot tunnel is the 1/3-2/3 of Tunnel overall height H.
Further, described temporary support inserts 0.1-0.3 rice in region to be dug.
Further, the temporary support is arcuate structure, and the radius R of circular arc corresponding to the temporary support is more than
8m。
The beneficial effects of the utility model are：
1st, by using the construction section, due to the excavation span of each section is reduced into half, therefore tunnel is improved
The safety coefficient of construction.
2nd, by using the construction section, section piecemeal is few, and disturbance is small, and preliminary bracing and temporary support are few, saves material,
The present invention only needs to perform a temporary support, and temporary support material is only the 1/2 of CD methods.
3rd, using section excavation tunnel of the present utility model, each several part, which excavates, to be coordinated in order, and construction influences each other
Degree substantially reduces, i.e., section the latter half, which is excavated, does not influence top half construction, can effectively improve efficiency of construction, experience
Card, using the speed of application of this method in the 90m/ months.
Brief description of the drawings
Fig. 1 is the front view that construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock；
Fig. 2 is the stereochemical structure signal that construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock
Figure；
In figure：The pilot tunnels of 1- first, the steel arch-shelfs of 11- first, the pilot tunnels of 2- second, the steel arch-shelfs of 21- second, the pilot tunnels of 3- the 3rd, 31-
3rd steel arch-shelf, 4- regions to be dug, 5- system anchor bolts, 6- temporary supports.
Embodiment
As shown in figure 1, construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock includes first
Pilot tunnel 1, the second pilot tunnel 2 and the 3rd pilot tunnel 3.The first wherein described pilot tunnel 1 is located at upper left side, and the second described pilot tunnel 2 is located at
Upper right side, the 3rd described pilot tunnel 3 are located at lower right side.The lower left side of Tunnel, i.e. the first described pilot tunnel 1, the and of the second pilot tunnel 2
The region of the inner side for the preliminary excavation hole body that 3rd pilot tunnel 3 is formed is region 4 to be dug.
As shown in Fig. 2 the leading flank (using the bearing of trend in tunnel before, similarly hereinafter) of first pilot tunnel 1 and the second pilot tunnel 2
Leading flank between distance M be less than or equal to 15m, between the leading flank of second pilot tunnel 2 and the leading flank of the 3rd pilot tunnel 3
Distance N be less than or equal to 10m, the distance between the leading flank of the 3rd pilot tunnel 3 and the leading flank in region 4 to be dug P are less than etc.
In 10m.
As depicted in figs. 1 and 2, the lateral wall of the pilot tunnel 2 of the first pilot tunnel 1 and second is curved, and first pilot tunnel 1
With concrete spray coating, the inside of the lateral wall of the pilot tunnel 2 of the first pilot tunnel 1 and second are injected with the lateral wall of the second pilot tunnel 2
It is radial to have assigned some system anchor bolts 5, and some system anchor bolts 5 are evenly distributed in center line both sides each 60 °
In the range of.
The lateral wall of the 3rd described pilot tunnel 3 is perpendicular, and concrete is injected with the lateral wall of the 3rd pilot tunnel 3
Spray-up.
As shown in figure 1, fixation is set respectively in the concrete spray coating of first pilot tunnel 1, the second pilot tunnel 2 and the 3rd pilot tunnel 3
It is equipped with the first steel arch-shelf 11, the second steel arch-shelf 21 and the 3rd linearly steel arch-shelf 31, and the first described steel arch-shelf 11, the
Two steel arch-shelfs 21 and the 3rd steel arch-shelf 31 join end to end successively, form steel arch-shelf.
Temporary support 6, the upper end of the temporary support 6 and institute are provided between described the first pilot tunnel 1 and the second pilot tunnel 2
The steel arch-shelf stated is fixedly connected, and the lower end of the temporary support 6 is inserted into region 4 to be dug.As a kind of embodiment,
In the present embodiment, described temporary support 6 inserts 0.1-0.3 rice in region 4 to be dug.
Preferably, the temporary support 6 is arcuate structure, and the radius R of circular arc corresponding to the temporary support 6 is more than
8m。
Further, in order to ensure that the basis of temporary support 6 consolidates, it is between the 3rd described pilot tunnel 3 and region to be dug 4
Inclined-plane with certain slope α, it is preferred that be provided with spray-up branch on the inclined-plane between the 3rd pilot tunnel 3 and region to be dug 4
Shield, and the gradient α in the region to be dug 4 is 1：0.2-1：0.75.
Further, the width L of the upper end of the 3rd pilot tunnel 3 is 5-7 rice, and the width Q of the upper end of region 4 to be dug is
12-14 rice.So setting mainly has three purposes, and (1) ensures there is sufficient construction space, and branch at initial stage is performed to the 3rd pilot tunnel 3
Shield；(2) enough Core Soils of region to be dug 4 are reserved, ensure the firm of the basis of temporary support 6；(3) reserve that sufficient space is current to be applied
Work machinery and personnel, such construction machinery and personnel's can are current on the upper side in region 4 to be dug, so as to ensure to the
When three pilot tunnels 3 are excavated, the excavation construction of the first pilot tunnel 1 and the second pilot tunnel 2 is not influenceed, improves efficiency of construction, shortens construction
Duration.
Further, in order to ensure the security of construction, first pilot tunnel 1 is identical with the height of the second pilot tunnel 2, is
H, and the height h of the pilot tunnel 2 of first pilot tunnel 1 and second is the 1/3-2/3 of Tunnel overall height H.
Claims (8)
1. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock, it is characterised in that：Including positioned at
The pilot tunnel of upper left side first, the second pilot tunnel positioned at upper right side and the 3rd pilot tunnel positioned at lower right side, the first described pilot tunnel, second
The region of the inner side for the preliminary excavation hole body that pilot tunnel and the 3rd pilot tunnel are formed is region to be dug；
Temporary support is provided between described the first pilot tunnel and the second pilot tunnel, upper end and the steel arch-shelf of the temporary support are fixed
Connection, the lower end of the temporary support is inserted into region to be dug；
It is the inclined-plane with certain slope α between the 3rd described pilot tunnel and region to be dug, and spray is provided with described inclined-plane
Layer supporting.
2. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：Concrete spray coating is injected with the curved lateral wall of first pilot tunnel and the second pilot tunnel is curved, institute
State the lateral wall of the first pilot tunnel and the second pilot tunnel inside it is radial assigned some system anchor bolts, the described the 3rd leads
It is injected with concrete spray coating on the lateral wall in perpendicular shape in hole, first pilot tunnel, the second pilot tunnel and the 3rd pilot tunnel
The first steel arch-shelf, the second steel arch-shelf and the 3rd linearly steel arch-shelf are fixedly installed in concrete spray coating respectively, and it is described
The first steel arch-shelf, the second steel arch-shelf and the 3rd steel arch-shelf join end to end successively, form described steel arch-shelf.
3. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：And the gradient α on inclined-plane is 1 on the right side of the region to be dug：0.2-1：0.75.
4. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：Distance M is less than or equal to 15m, second pilot tunnel and the 3rd pilot tunnel between first pilot tunnel and the second pilot tunnel
The distance between N be less than or equal to 10m, the distance between the 3rd pilot tunnel and region to be dug P are less than or equal to 10m.
5. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：The width L of the 3rd pilot tunnel upper end is 5-7 rice, and the width Q of the upper end in the region to be dug is 12-14 rice.
6. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：The height h of first pilot tunnel and the second pilot tunnel is the 1/3-2/3 of Tunnel overall height H.
7. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：Described temporary support inserts 0.1-0.3 rice in region to be dug.
8. construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock according to claim 1,
It is characterized in that：The temporary support is arcuate structure, and the radius R of circular arc corresponding to the temporary support is more than 8m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720490494.5U CN206830195U (en) | 2017-05-04 | 2017-05-04 | Construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720490494.5U CN206830195U (en) | 2017-05-04 | 2017-05-04 | Construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock |
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| Publication Number | Publication Date |
|---|---|
| CN206830195U true CN206830195U (en) | 2018-01-02 |
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| CN201720490494.5U Active CN206830195U (en) | 2017-05-04 | 2017-05-04 | Construction section is coordinated by a kind of single-hole with four lanes tunnel branch for being applied to III grade of country rock |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847206A (en) * | 2019-11-14 | 2020-02-28 | 中建八局轨道交通建设有限公司 | Construction method for newly-built subway tunnel to penetrate existing bridge piles |
-
2017
- 2017-05-04 CN CN201720490494.5U patent/CN206830195U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847206A (en) * | 2019-11-14 | 2020-02-28 | 中建八局轨道交通建设有限公司 | Construction method for newly-built subway tunnel to penetrate existing bridge piles |
| CN110847206B (en) * | 2019-11-14 | 2021-03-12 | 中建八局轨道交通建设有限公司 | Construction method for newly-built subway tunnel to penetrate existing bridge piles |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250031 Shandong Province Flyover District of Ji'nan city Shanxi Road No. 576. Patentee after: Shandong transportation planning and Design Institute Co.,Ltd. Patentee after: SHANDONG LUQIAO GROUP Co.,Ltd. Address before: 250031 Shandong Province Flyover District of Ji'nan city Shanxi Road No. 576. Patentee before: SHANDONG PROVINCIAL COMMUNICATIONS PLANNING AND DESIGN INSTITUTE Patentee before: SHANDONG LUQIAO GROUP Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Patentee after: Shandong transportation planning and Design Institute Group Co.,Ltd. Patentee after: SHANDONG LUQIAO GROUP Co.,Ltd. Address before: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Patentee before: Shandong transportation planning and Design Institute Co.,Ltd. Patentee before: SHANDONG LUQIAO GROUP Co.,Ltd. |