CN214273662U - Shield constructs in-connection structure in mine handing-over tunnel - Google Patents
Shield constructs in-connection structure in mine handing-over tunnel Download PDFInfo
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- CN214273662U CN214273662U CN202022716339.5U CN202022716339U CN214273662U CN 214273662 U CN214273662 U CN 214273662U CN 202022716339 U CN202022716339 U CN 202022716339U CN 214273662 U CN214273662 U CN 214273662U
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Abstract
The utility model provides a connection structure in shield constructs mine handing-over tunnel hole, relates to tunnel construction technical field, including excavated tunnel section and the tunnel section that does not excavate, excavated tunnel section is the construction shaping of mine method two linings of construction in the excavated tunnel section are strutted the face department slip casting of excavated tunnel section forms face slip casting layer, face slip casting layer with handing-over department installation water inflation sealing rod that two linings were strutted is sealed the top and the both sides slip casting of excavated tunnel section form a plurality of radial slip casting posts, the distribution of radial slip casting post is: the excavated tunnel sections are arranged in a circle along the circumference direction of the excavated tunnel sections and are distributed at equal intervals along the axial direction of the excavated tunnel sections. This is novel when strengthening supporting construction, has waterproof leak protection's effect.
Description
Technical Field
The utility model relates to a tunnel construction technical field, concretely relates to connection structure in shield constructs mine handing-over tunnel hole.
Background
The mining method is a tunnel excavation construction method of a subsurface excavation method, and mainly adopts a drilling blasting method to excavate a cross section to construct a tunnel and an underground engineering. The shield method is a fully mechanical construction method in the construction of the undercut method, which is to push the shield machine in the stratum and prevent the collapse of the tunnel by the shield shell and the segment support; and simultaneously, excavating the soil body in front of the excavation surface by using a cutting device, pushing the soil body on the duct piece by using a jack, pressurizing and jacking, and assembling the duct piece to form a tunnel structure every time one ring of the excavation is carried out. The mining method is small in investment and low in manufacturing cost, but is only suitable for urban tunnels and mountain tunnels with good soil property. The shield method has large investment and high manufacturing cost, but is suitable for tunnel construction with poor soil quality and surrounding rock conditions.
In actual construction, in order to deal with various soil bottom layer environments and reduce construction cost, the shield method and the mine method are adopted for synchronous construction, and then the tunnel butt joint is completed, so that the construction of the tunnel section at the junction of the shield method and the mine method belongs to a section with a large construction difficulty coefficient. Because the soil layer of the junction is relatively complicated, such as rich water content, soft upper part and hard lower part, sandy soil layer, gravel layer and the like, the junction needs to be considered to be supported and sealed in advance in order to prevent the defects of collapse, water leakage and the like of the shield tunneling machine during construction.
Disclosure of Invention
In order to solve the problem of the prior art, the utility model provides a connection structure in shield constructs mine handing-over tunnel hole when strengthening supporting construction, has waterproof leak-proof effect.
The purpose of the utility model can be realized by the following technical proposal: the utility model provides a connection structure in shield constructs mine handing-over tunnel hole, includes excavation tunnel section and non-excavation tunnel section, the excavation tunnel section is the construction shaping of mine method two linings of construction in the excavation tunnel section are strutted the tunnel face department slip casting of excavation tunnel section forms face slip casting layer, face slip casting layer with handing-over department installation water inflation sealing rod that two linings were strutted is sealed the top and the both sides slip casting of excavation tunnel section form a plurality of radial slip casting posts, the distribution of radial slip casting post is: the excavated tunnel sections are arranged in a circle along the circumference direction of the excavated tunnel sections and are distributed at equal intervals along the axial direction of the excavated tunnel sections.
Preferably, two adjacent circles of the radial grouting columns are in a group in the circumferential direction of the excavated tunnel section, and the inclination angles of the radial grouting columns of the two circles in each group relative to the diameter direction of the tunnel are opposite, that is, the radial grouting columns of the two circles in each group are distributed in a cross manner. Each group of radial grouting columns are distributed in a crossed manner, so that the force bearing and supporting capacity is better.
Preferably, two circles of circumferentially distributed inclined grouting columns are formed at the front end of the excavated tunnel section by grouting, and the inclined grouting columns are inclined towards the tunnel face grouting layer.
Preferably, the depth of the end part of the inclined grouting column extending into the front end of the excavated tunnel segment is greater than the width of a ring of pipe pieces.
Preferably, a plurality of annular axial grouting columns are grouted at the front end of the tunnel face grouting layer, and each annular axial grouting column is uniformly distributed on the circumference.
Preferably, a steel ring is installed on the inner wall of the front end of the two-lining support, two groups of sealing devices are fixedly installed in the steel ring, and the sealing devices are used for sealing gaps between the shield body and the two-lining support.
Preferably, the sealing device comprises an annular steel plate, and the annular cord rubber layer is fixedly arranged on the annular steel plate through bolts.
The utility model discloses the combined effect who brings includes: 1. the utility model discloses simple structure is reasonable, and the input cost is lower. 2. A tunnel face grouting layer is formed on a tunnel face, a bottom layer at the tunnel face is reinforced and supported, a plurality of axial grouting columns are constructed at the front end of the tunnel face, a soil layer at the front end of the tunnel face is reinforced, and the situations of collapse, quicksand and the like when the shield body is driven to the tunnel face are avoided. 3. At the top and both sides construction axial slip casting post in the tunnel that has excavated, the purpose is the soil mass around the reinforcement tunnel, avoids appearing the risk of collapsing, can effectively improve whole steadiness, the reliability in tunnel, ensures construction safety. 4. When the shield body enters the tunnel for no-load tunneling, the sealing device seals a gap between the shield body and the support, so that water and quicksand in a soil layer cannot flow into the tunnel from one side of the tunnel face during tunneling, and the phenomena of water leakage and sand leakage are avoided.
Drawings
Fig. 1 is the utility model discloses connection structure's in shield constructs mine handing-over tunnel hole schematic diagram.
Fig. 2 is the embodiment of the utility model provides a shield constructs connection structure's in mine handing-over tunnel hole side view structure sketch map.
Fig. 3 is the embodiment of the utility model provides a shield constructs the interior connection structure's of mine handing-over tunnel cave structural schematic diagram of state of tunnelling.
Fig. 4 is a schematic diagram of the structure at a in fig. 3.
Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.
Detailed Description
The invention is further described with reference to the following figures and examples.
Examples
The embodiment of the utility model provides a realize through following technical scheme: the utility model provides a connection structure in shield constructs mine handing-over tunnel hole, includes excavated tunnel section 1 and unearthed tunnel section 2, excavated tunnel section 1 is the construction shaping of mine method the two linings of construction are strutted 3 in the excavated tunnel section 1 the face department slip casting of excavated tunnel section 1 forms face slip casting layer 4, face slip casting layer 4 with the handing-over department that 3 was strutted to two linings installation water inflation sealing rod 5 is sealed the top and the both sides slip casting of excavated tunnel section 1 form a plurality of radial slip casting post 6, the distribution of radial slip casting post 6 is: arranged in a circle along the excavated tunnel section 1 in the circumferential direction thereof, and equally spaced along the axial direction of the excavated tunnel section 1. In the circumferential direction of the excavated tunnel section 1, two adjacent circles of the radial grouting columns 6 form a group, and the inclination angles of the radial grouting columns 6 of the two circles in each group relative to the diameter direction of the tunnel are opposite, that is, the radial grouting columns 6 of the two circles in each group are distributed in a crossed manner. Each group of radial grouting columns 6 are distributed in a crossed manner, and the force bearing and supporting capacity is better.
Further, in the present embodiment, two circles of circumferentially distributed inclined grouting columns 7 are formed at the front end of the excavated tunnel section 1 by grouting, and the inclined grouting columns 7 are inclined toward the tunnel face grouting layer 4. The depth of the end part of the inclined grouting column 7 extending into the front end of the excavated tunnel segment 1 is larger than the width of a ring of pipe pieces.
Further, in this embodiment, a plurality of axial grouting columns 8 are grouted at the front end of the tunnel face grouting layer 4, and each axial grouting column 8 is uniformly distributed on the circumference.
Further, in this embodiment, a steel ring 9 is installed on the inner wall of the front end of the two-lining support 3, two sets of sealing devices 10 are fixedly installed in the steel ring 9, and the sealing devices 10 are used for sealing a gap between the shield body 11 and the two-lining support 3. The sealing device 10 comprises an annular steel plate 101, and an annular cord rubber layer 102 is fixedly installed on the annular steel plate 101 through bolts.
The embodiment of the utility model provides a comprehensive effect brought includes: 1. the utility model discloses simple structure is reasonable, and the input cost is lower. 2. A tunnel face grouting layer 4 is formed on the tunnel face, the bottom layer at the tunnel face is reinforced and supported, meanwhile, a plurality of axial grouting columns 8 are constructed at the front end of the tunnel face, the soil layer at the front end of the tunnel face is reinforced, and the situations of collapse, sand flowing and the like when the shield body 11 is tunneled to the place are avoided. 3. At the top and both sides construction axial slip casting post 8 of excavated tunnel, the purpose is the soil mass around the reinforcement tunnel, avoids appearing the risk of collapsing, can effectively improve whole steadiness, the reliability in tunnel, ensures construction safety. 4. When the shield body 11 enters the tunnel for no-load tunneling, the sealing device 10 seals a gap between the shield body 11 and a support, so that water and quicksand in a soil layer cannot flow into the tunnel from one side of a tunnel face during tunneling, and the phenomena of water leakage and sand leakage are avoided.
The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The present invention has been described above with reference to the preferred embodiments, but the scope of protection of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict.
Claims (7)
1. The utility model provides a connection structure in shield constructs mine handing-over tunnel hole, a serial communication port, including excavated tunnel section and the tunnel section that does not excavate, excavated tunnel section is the construction shaping of mine method two linings of construction in the excavated tunnel section are strutted the face department slip casting of excavated tunnel section forms face slip casting layer, face slip casting layer with handing-over department installation water inflation sealing rod that two linings were strutted is sealed the top and the both sides slip casting of excavated tunnel section form a plurality of radial slip casting posts, the distribution of radial slip casting post is: the excavated tunnel sections are arranged in a circle along the circumference direction of the excavated tunnel sections and are distributed at equal intervals along the axial direction of the excavated tunnel sections.
2. The shield mine handover tunnel-to-tunnel connection structure of claim 1, wherein the radial grouting columns are arranged in a group of two adjacent circles in the circumferential direction of the excavated tunnel section, and the inclination angles of the radial grouting columns of the two circles in each group are opposite to the diameter direction of the tunnel, that is, the radial grouting columns of the two circles in each group are distributed in a cross way.
3. The shield-mine interfacing tunnel-to-tunnel connection structure of claim 2, wherein two circles of circumferentially distributed inclined grouting columns are formed by grouting at the front end of the excavated tunnel section, and the inclined grouting columns are inclined toward the tunnel face grouting layer.
4. The shield-mine interfacing tunnel-in-tunnel connection structure of claim 3, wherein a depth of an end of the inclined grouting column extending into a front end of the excavated tunnel segment is greater than a width of a ring of pipe pieces.
5. The shield mine connecting structure in a tunnel according to claim 4, wherein a plurality of annular axial grouting columns are grouted at the front end of the tunnel face grouting layer, and each annular axial grouting column is uniformly distributed in the circumferential direction.
6. The shield mine handover tunnel-in-tunnel connection structure of claim 5, wherein a steel ring is installed on the inner wall of the front end of the two-lining support, two sets of sealing devices are fixedly installed in the steel ring, and the sealing devices are used for sealing a gap between a shield body and the two-lining support.
7. The shield mine handover tunnel in-tunnel connection structure of claim 6, wherein the sealing means comprises an annular steel plate, and an annular cord rubber layer is fixedly mounted on the annular steel plate by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022716339.5U CN214273662U (en) | 2020-11-20 | 2020-11-20 | Shield constructs in-connection structure in mine handing-over tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022716339.5U CN214273662U (en) | 2020-11-20 | 2020-11-20 | Shield constructs in-connection structure in mine handing-over tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN214273662U true CN214273662U (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022716339.5U Active CN214273662U (en) | 2020-11-20 | 2020-11-20 | Shield constructs in-connection structure in mine handing-over tunnel |
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| CN (1) | CN214273662U (en) |
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- 2020-11-20 CN CN202022716339.5U patent/CN214273662U/en active Active
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