CN210217772U - Supporting construction of diversion tunnel under high ground stress condition - Google Patents
Supporting construction of diversion tunnel under high ground stress condition Download PDFInfo
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- CN210217772U CN210217772U CN201920991215.2U CN201920991215U CN210217772U CN 210217772 U CN210217772 U CN 210217772U CN 201920991215 U CN201920991215 U CN 201920991215U CN 210217772 U CN210217772 U CN 210217772U
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- bow member
- steel bow
- diversion tunnel
- reinforcing bar
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Abstract
The utility model discloses a supporting construction of diversion tunnel under high ground stress condition, include a plurality of steel bow member that diversion tunnel length extending direction along rock mass excavation formation evenly laid, interconnect between a plurality of steel bow members, be provided with a plurality of stocks along every steel bow member perpendicular to surface, every wash port sets up between two adjacent stocks, the stock, the wash port all with diversion tunnel perpendicular to surface, still laid the inboard lacing wire reinforcing bar of steel bow member and the steel bow member outside lacing wire reinforcing bar along the hole inner wall, the inboard lacing wire reinforcing bar of steel bow member and the steel bow member outside lacing wire reinforcing bar branch house steel bow member both sides, the inboard lacing wire reinforcing bar of steel bow member, fill between the steel bow member and the steel bow member outside lacing wire reinforcing bar and spout the concrete, the inboard lacing wire reinforcing bar of steel bow member, the steel bow member outside lacing wire reinforcing bar and the equal fixed connection of stock. The utility model discloses can effectively reduce the surrounding rock groundwater seepage during the construction, effectively reduce because of the diversion tunnel strut untimely wait and cause the risk of landslide, reduce the engineering investment for the construction progress.
Description
Technical Field
The utility model belongs to the technical field of diversion among the hydraulic and hydroelectric engineering, concretely relates to supporting construction of diversion tunnel under high ground stress condition.
Background
In the construction of water conservancy and hydropower engineering, the diversion tunnel is a common structural form, and when the diversion tunnel is positioned at a high underground water level and under the condition that the initial ground stress is greater than 20Mpa, how to ensure the stability of surrounding rocks of the diversion tunnel becomes an important technology in the field of diversion tunnel design. At present, support measures for diversion tunnels generally adopt net hanging and concrete spraying, anchor rod support, steel arch frames and the like, and the measures are influenced by construction processes and construction conditions, so that the problems of serious water seepage, incapability of ensuring the spraying and mixing thickness, insecure connection of the anchor rod support and the steel arch frames and the like exist in the construction period, the problems of deformation, collapse and the like of a cavern easily occur, the treatment difficulty is high after collapse, the construction period is often prolonged, the investment is increased and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a supporting construction of diversion tunnel under high ground stress condition can effectively reduce the seepage of surrounding rock groundwater during the construction, effectively reduces simultaneously because of the diversion tunnel struts untimely wait and causes the risk of landslide, reduces the engineering investment for the construction progress.
The utility model adopts the technical scheme that a supporting construction of diversion tunnel under high ground stress condition, include a plurality of steel arches that evenly lay along diversion tunnel length extending direction that rock mass excavation formed, interconnect between a plurality of steel arches is provided with a plurality of stocks along every steel arch surface vertical, and a plurality of stocks are quincunx along the annular evenly distributed of hole inner wall, encircle 180 at diversion tunnel crown simultaneouslyoA plurality of wash ports have evenly been arranged in the within range, every wash port sets up between two adjacent stocks, the stock, the wash port all with diversion tunnel surface vertical, still laid inboard lacing wire reinforcing bar of steel bow member and steel bow member outside lacing wire reinforcing bar along the hole inner wall, inboard lacing wire reinforcing bar of steel bow member and steel bow member outside lacing wire reinforcing bar are separated in steel bow member both sides, inboard lacing wire reinforcing bar of steel bow member, it has the shotcrete to fill between steel bow member and the steel bow member outside lacing wire reinforcing bar, inboard lacing wire reinforcing bar of steel bow member, the steel bow member outsideThe net hanging reinforcing steel bars are fixedly connected with the anchor rods.
The steel arch frames are mutually connected along the axial direction of the tunnel through steel arch frame connecting ribs;
the section of the diversion tunnel is any one of horseshoe shape, square shape and arch shape.
The utility model is also characterized in that,
the anchor rod and the steel arch inner side net hanging reinforcing steel bar are welded and fixed.
The anchor rod and the steel arch frame outside net hanging reinforcing steel bar are welded and fixed.
The anchor rod and the steel arch frame are welded and fixed.
The beneficial effects of the utility model are that, a supporting construction of diversion tunnel under high ground stress condition, this supporting construction form include steel bow member, the inboard net reinforcing bar of hanging of steel bow member, the steel bow member outside net reinforcing bar of hanging, steel bow member joint bar, spout concrete, wash port. According to the utility model discloses after setting up diversion tunnel's supporting construction form, can effectual reduction construction period country rock groundwater seepage, guarantee spout muddy thickness, fixed stock, steel bow member, make it form stable joint stress structure wholly. Meanwhile, the risk of collapse caused by untimely supporting of the diversion tunnel is effectively reduced, the engineering investment is reduced, and the construction progress is accelerated.
Drawings
Fig. 1 is a schematic structural diagram of a supporting structure of a diversion tunnel under a high ground stress condition.
In the figure, 1, steel arch frames, 2, steel arch frame inner side mesh hanging reinforcing steel bars, 3, steel arch frame outer side mesh hanging reinforcing steel bars, 4, steel arch frame connecting bars, 5, concrete spraying, 6, anchor rods, 7, rock masses and 8, drain holes.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a supporting construction of diversion tunnel under high ground stress condition, the structure is as shown in figure 1, include a plurality of steel bow member 1 that evenly lay along diversion tunnel length extending direction that 7 excavates the formation of rock mass, interconnect between a plurality of steel bow member 1 is provided with a plurality of stock along 1 perpendicular surfaces of every steel bow member6, a plurality of anchor rods 6 are uniformly distributed along the inner wall of the tunnel in a quincunx shape and are arranged on the top arch 180 of the diversion tunneloA plurality of wash ports 8 have evenly been arranged in the within range, every wash port 8 sets up between two adjacent stocks 6, stock 6, wash port 8 all with diversion tunnel surface vertical, still laid inboard lacing wire reinforcing bar 2 of steel bow member and steel bow member outside lacing wire reinforcing bar 3 along the hole inner wall, steel bow member inboard lacing wire reinforcing bar 2 and the steel bow member outside lacing wire reinforcing bar 3 separated steel bow member 1 both sides, inboard lacing wire reinforcing bar 2 of steel bow member, it has spray concrete 5 to fill between steel bow member 1 and the steel bow member outside lacing wire reinforcing bar 3, inboard lacing wire reinforcing bar 2 of steel bow member, steel bow member 1, steel bow member outside lacing wire reinforcing bar 3 and the equal fixed connection of stock 6.
The steel arch frames 1 are connected with each other along the axial direction of the tunnel through steel arch frame connecting ribs 4.
The anchor rod 6 and the steel arch inner side net hanging reinforcing steel bar 2 are welded and fixed.
The anchor rod 6 and the steel arch frame outer side net hanging reinforcing steel bar 3 are welded and fixed.
The anchor rod 6 and the steel arch frame 1 are welded and fixed.
The section of the diversion tunnel is any one of horseshoe shape, square shape and arch shape.
The utility model relates to a supporting construction of diversion tunnel under high ground stress condition, it has the concrete 5 of spouting to pack between the inboard string net reinforcing bar 2 of steel bow member, steel bow member 1 and the steel bow member outside string net reinforcing bar 3, makes it closely knit, complete, forms jointly the atress structure wholly, can effectual reduction during construction country rock groundwater seepage, the assurance spout thoughtlessly thickness, fixed stock, steel bow member, makes it form stable joint atress structure wholly. Meanwhile, the risk of collapse caused by untimely supporting of the diversion tunnel is effectively reduced, the engineering investment is reduced, and the construction progress is accelerated.
Claims (4)
1. The utility model provides a supporting construction of diversion tunnel under high ground stress condition, its characterized in that includes a plurality of steel bow member (1) that evenly lay along diversion tunnel length extending direction that rock mass (7) excavation formed, interconnect between a plurality of steel bow member (1), is provided with a plurality of stock (6) along every steel bow member (1) surface vertical, and a plurality of stock (6) are quincunx shapeUniformly distributed along the inner wall of the tunnel in a ring shape and simultaneously arranged on a top arch 180 of the diversion tunneloA plurality of drain holes (8) are uniformly distributed in the range, each drain hole (8) is arranged between two adjacent anchor rods (6), the anchor rods (6) and the drain holes (8) are vertical to the surface of the diversion tunnel, steel arch inner side net hanging reinforcing steel bars (2) and steel arch outer side net hanging reinforcing steel bars (3) are further paved along the inner wall of the tunnel, the steel arch inner side net hanging reinforcing steel bars (2) and the steel arch outer side net hanging reinforcing steel bars (3) are respectively arranged on two sides of the steel arch (1), concrete (5) is filled between the steel arch inner side net hanging reinforcing steel bars (2), the steel arch (1), the steel arch outer side net hanging reinforcing steel bars (3) and the anchor rods (6) are fixedly connected;
the steel arch frames (1) are mutually connected along the axial direction of the tunnel through steel arch frame connecting ribs (4);
the section of the diversion tunnel is any one of horseshoe shape, square shape and arch shape.
2. The supporting structure of the diversion tunnel under the high ground stress condition of claim 1, wherein the anchor rods (6) are welded and fixed with the steel arch inner side net hanging steel bars (2).
3. The supporting structure of the diversion tunnel under the high ground stress condition of claim 1, wherein the anchor rods (6) are welded and fixed with the external side of the steel arch by the net hanging steel bars (3).
4. The supporting structure of the diversion tunnel under the high ground stress condition of claim 1, wherein the anchor rods (6) are welded and fixed with the steel arch (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920991215.2U CN210217772U (en) | 2019-06-27 | 2019-06-27 | Supporting construction of diversion tunnel under high ground stress condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920991215.2U CN210217772U (en) | 2019-06-27 | 2019-06-27 | Supporting construction of diversion tunnel under high ground stress condition |
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| Publication Number | Publication Date |
|---|---|
| CN210217772U true CN210217772U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920991215.2U Active CN210217772U (en) | 2019-06-27 | 2019-06-27 | Supporting construction of diversion tunnel under high ground stress condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344855A (en) * | 2019-06-27 | 2019-10-18 | 中国电建集团西北勘测设计研究院有限公司 | The supporting construction of diversion tunnel under a kind of large ground pressure |
-
2019
- 2019-06-27 CN CN201920991215.2U patent/CN210217772U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344855A (en) * | 2019-06-27 | 2019-10-18 | 中国电建集团西北勘测设计研究院有限公司 | The supporting construction of diversion tunnel under a kind of large ground pressure |
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