CN111022072A - Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method - Google Patents
Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method Download PDFInfo
- Publication number
- CN111022072A CN111022072A CN201911298049.9A CN201911298049A CN111022072A CN 111022072 A CN111022072 A CN 111022072A CN 201911298049 A CN201911298049 A CN 201911298049A CN 111022072 A CN111022072 A CN 111022072A
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- secondary lining
- joint
- shaped member
- shaped
- reinforcing
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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
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
Abstract
The invention discloses a combined joint for reinforcing a secondary lining of a tunnel constructed by a mining method and an installation method, wherein the combined joint comprises an extrados joint and an intrados joint, the extrados joint comprises connecting grooves respectively arranged at the end parts of two opposite secondary lining segments, C-shaped members are respectively arranged at one sides of the connecting grooves, bolt holes are formed in the bottom surfaces of the C-shaped members, anchor bars penetrate through the bolt holes, and the C-shaped members are connected through H-shaped members; one end of the H-shaped component is abutted with the supporting component; the installation method comprises the step of presetting a connecting groove, a C-shaped member, a circumferential joint hand hole and a straight bolt hole in two secondary lining segments. The invention can solve the problem of insufficient bending moment resistance of secondary lining reinforcement in the prior art, has simple structure and strong reliability, can obviously weaken the stress concentration effect of the segment joint and reduce the concrete fracturing risk of the segment joint.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a combined joint for reinforcing a secondary lining of a tunnel constructed by a mining method and an installation method.
Background
The method commonly adopted by the existing tunnel construction is a mining method, which comprises the traditional mining method, the new Austrian method, the Xinyi method and similar construction methods, and the secondary lining reinforcement of the tunnel constructed by the mining method generally adopts on-site binding of reinforcing steel bars and secondary lining reinforcement trolleys for cast-in-place construction, so that the construction efficiency is lower.
With the development of construction mechanization and intellectualization, the secondary lining reinforcement of the tunnel is constructed in a mode of factory prefabrication and field assembly, so that the construction efficiency can be improved, the material waste can be reduced, the environmental pollution is reduced, and the method has wide application prospect in the field of mine tunnel engineering construction.
Different from the common round tunnel section constructed by a rock tunnel boring machine, the mine tunnel is generally flat, the bending moment of the secondary lining reinforcing structure is large under the action of external load, and the prefabricated secondary lining reinforcing segment joint needs to have large bending moment resistance. And the reinforced section of jurisdiction of current secondary lining connects under the external load effect, has the section of jurisdiction joint to open easily and then leads to connecting the risk that waterproof failure, section of jurisdiction joint position water leakage problem take place.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the combined joint for reinforcing the secondary lining of the tunnel constructed by the mining method and the mounting method, which can solve the problem of insufficient bending moment resistance of the secondary lining reinforcement in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the combined joint comprises an extrados joint and an intrados joint, wherein the extrados joint comprises connecting grooves which are respectively arranged at the end parts of two opposite secondary lining segments, a C-shaped member is respectively arranged at one side of each connecting groove, a bolt hole is formed in the bottom surface of each C-shaped member, an anchor bar penetrates through each bolt hole, and the C-shaped members are connected through an H-shaped member; one end of the H-shaped component is abutted with the supporting component; the intrados connects including setting up respectively in the straight bolt hole and the hoop of two relative secondary lining section of jurisdiction tip and connecting the hand hole, and straight bolt hole and hoop connect the hand hole and be provided with straight bolt within a definite time.
Among the above-mentioned technical scheme, preferably, the parallel is provided with a plurality of anchor bars in the spread groove.
In the above technical solution, preferably, the length of the connecting groove is the sum of the lengths of the H-shaped member and the support member.
Among the above-mentioned technical scheme, preferred, extrados connects for horizontal pin formula, and the distance that both sides anchor bar arrive secondary lining section of jurisdiction lateral wall is the same.
In the above technical scheme, preferably, a plurality of external cambered surface joints and internal cambered surface joints are arranged on the two opposite secondary lining pipe pieces.
The invention also provides an installation method of the combined joint for reinforcing the secondary lining of the tunnel constructed by the mining method, which comprises the following steps:
s1, arranging connecting grooves, C-shaped members, annular joint hand holes and straight bolt holes in the two secondary lining segments in advance;
s2, before the two secondary lining segments are assembled, a supporting member is arranged on one side, which is not provided with the C-shaped member, of the connecting groove;
s3, clamping one side of the H-shaped component with the C-shaped component on the secondary lining segment on one side until the end face of the H-shaped component is abutted against the supporting component;
s4, splicing the secondary lining segment provided with the H-shaped member and the secondary lining segment not provided with the H-shaped member in a staggered manner, so that the other side of the H-shaped member is clamped with another C-shaped member until the end face of the H-shaped member is abutted against the end face of the connecting groove at the rear side of the C-shaped member;
and S5, installing a straight bolt from the annular joint hand hole, thereby completing the installation of the combined joint.
Furthermore, secondary lining pipe pieces of the arch wall lining are all prefabricated, and connecting grooves are reserved during prefabrication.
Further, the anchor bars are positioned and installed through the C-shaped components.
Furthermore, the inverted arch lining segment is cast in place, and the C-shaped member, the supporting member and the anchor bars are buried before casting.
Further, the straight bolt is arranged obliquely relative to the side wall of the secondary lining segment.
The combined joint for reinforcing the secondary lining of the tunnel constructed by the mining method provided by the invention has the main beneficial effects that:
according to the invention, the outer arc surface joint is matched with the inner arc surface joint, and the C-shaped member and the H-shaped member are arranged, so that the area of a pressed area of the segment joint is increased when the segment joint is bent, and the risk of local fracturing of the segment joint is reduced, thereby reducing the risk of the segment joint opening under the action of external load and further causing the problems of waterproof failure of the joint and water leakage at the segment joint position.
Under the positive moment of flexure effect, the straight bolt is drawn, leans on outer cambered surface side concrete pressurized, and straight bolt is great apart from section of jurisdiction neutral axis distance, and the section of jurisdiction joint satisfies the flat section assumption basically, and the section of jurisdiction leans on outer cambered surface side concrete pressurized, and the pressurized area is great, and the pressurized is even, can show to weaken section of jurisdiction joint stress concentration effect, reduces section of jurisdiction joint concrete fracture risk.
Under the action of negative bending moment, the outer cambered surface joint, namely the horizontal pin type joint is pulled and is pressed by concrete on the inner cambered surface side, the distance between the pin type joint and the neutral axis of the duct piece is larger, the duct piece joint basically meets the assumption of a flat section, the duct piece is pressed by concrete on the inner cambered surface side, the pressed area is larger, the pressed area is uniform, the stress concentration effect of the duct piece joint can be obviously weakened, and the concrete fracturing risk of the duct piece joint is reduced.
The installation method of the combined joint for reinforcing the secondary lining of the mine construction tunnel provided by the invention has the main beneficial effects that:
the C-shaped member and the H-shaped member are arranged in advance, so that field installation is facilitated; by arranging the supporting member, the H-shaped member is conveniently positioned, so that the force bearing effect of the H-shaped member is improved; through setting up the ring to the hand hole to conveniently install straight bolt, with fixed intrados looks interconnecting piece.
The secondary lining segments on the two sides are spliced in a staggered manner to be in place, so that joints are convenient to install, and the structural collision of the secondary lining segments in the installation process can be prevented to the maximum extent; through on-site installation H type component, avoid producing collision damage in section of jurisdiction transportation.
Before the assembly of the duct piece, the H-shaped component is positioned on one C-shaped component by adopting the additional supporting piece, and the H-shaped component and the two C-shaped components are tightly attached and stressed by relative sliding among the components in the field assembly process.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the H-shaped member.
Fig. 3 is a top view of the C-shaped member.
Fig. 4 is a schematic view of the installation direction of the H-shaped member.
FIG. 5 is a schematic view showing the positional relationship between the secondary lining and the primary support.
Fig. 6 is a flow chart of an installation method.
The construction method comprises the following steps of 1, extrados joint, 11, C-shaped member, 12, bolt hole, 13, H-shaped member, 14, supporting member, 15, anchor bar, 2, intrados joint, 21, annular joint hand hole, 22, straight bolt hole, 23, straight bolt, 3, secondary lining segment, 31, primary support, 32, inverted arch lining, 33, arch wall lining, 34, reserved deformation, 35 and connecting groove.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, it is a schematic structural diagram of a combined joint for reinforcing a secondary lining of a tunnel constructed by a mining method.
The combined joint for reinforcing the secondary lining of the tunnel constructed by the mining method comprises an outer arc surface joint 1 and an inner arc surface joint 2, wherein the outer arc surface joint 1 comprises connecting grooves 35 which are respectively arranged at the end parts of two opposite secondary lining segments 3, and a plurality of anchor bars 15 are arranged in the connecting grooves 35 in parallel. C-shaped members 11 are respectively arranged on one side of the connecting grooves 35, bolt holes 12 are formed in the bottom surfaces of the C-shaped members 11, anchor bars 15 penetrate through the bolt holes 12, and the C-shaped members 11 are connected through H-shaped members 13; one end of the H-shaped member 13 abuts against the support member 14. A support member 14 is provided in each connecting slot, the width of the support member 14 being greater than or equal to the width of the C-shaped member 11.
The two cambered surfaces opposite to the secondary lining segment 3 are fixed through the matching of the H-shaped member 13 and the C-shaped member 11; anchor bars 15 are used for improving the anchoring effect of the C-shaped member 11 and the secondary lining segment 3, and further improving the overall fixing effect of the extrados joint 1.
Intrados connects 2 including setting up respectively in the straight bolt hole 22 and the hoop of 3 tip of two relative secondary lining section of jurisdiction hand holes 21 that connect, and straight bolt hole 22 and hoop connect hand hole 21 to be relative setting, and through straight bolt 23 interconnect between straight bolt hole 22 and hoop connect hand hole 21.
Specifically, the length of the connecting groove 35 is the sum of the lengths of the H-shaped member 13 and the supporting member 14, and the length of the C-shaped member 11 is the same as that of the H-shaped member 13, so as to ensure that the H-shaped member 13 and the supporting member 14 are attached to each other after installation, thereby ensuring that the H-shaped member 13 and the C-shaped member 11 are attached to each other compactly to the maximum extent, so as to ensure stress.
The outer cambered surface joint 1 is a horizontal pin type joint, and the distances from the anchor bars 15 at the two sides to the side wall of the secondary lining segment 3 are the same. When the outer cambered surface joint is subjected to the action of negative bending moment, the horizontal pin type joint ensures that the tensile force of the duct pieces on the two sides is uniform, so that the stress concentration effect is reduced, and the service life of the structure is prolonged.
Preferably, a plurality of external cambered surface joints 1 and internal cambered surface joints 2 are arranged on the two opposite secondary lining segments 3. So as to ensure the structural strength among the secondary lining segments 3.
The invention also provides an installation method based on the combined joint, which comprises the following steps:
s1, presetting a connecting groove 35, a C-shaped member 11, a circumferential joint hand hole 21 and a straight bolt hole 22 in two secondary lining segments 3;
wherein, the secondary lining segments 3 for the arch wall lining 33 are all prefabricated, and the connecting grooves 35 are reserved during the prefabrication so as to facilitate the installation of the C-shaped components 11 and the supporting components 14. At this time, the anchor bars 15 are positioned and installed by the C-shaped member 11.
The secondary lining segment 3 for the inverted arch lining 32 is cast in situ in the primary support 31, and the C-shaped member 11, the support member 14, and the anchor 15 are embedded before casting.
S2, before the two secondary lining segments 3 are assembled, the support member 14 is installed on the connecting groove 35 on the side where the C-shaped member 11 is not installed. So that it is possible to facilitate the pre-installation of the H-shaped member 13 in the coupling groove 35 at this side.
S3, one side of the H-shaped member 13 is engaged with the C-shaped member 11 on the secondary lining segment 3 with the support member 14 attached until the end face of the H-shaped member 13 abuts against the support member 14.
And S4, splicing the secondary lining segment 3 provided with the H-shaped member 13 and the secondary lining segment 3 not provided with the H-shaped member 13 in a staggered manner, so that the other side of the H-shaped member 13 is clamped with the other C-shaped member 11 until the end face of the H-shaped member 13 is abutted against the end face of the connecting groove 35 at the rear side of the C-shaped member 11.
And S5, installing the straight bolt 23 from the annular joint hand hole 21 until the straight bolt 23 is in threaded connection with the straight bolt hole 22, thereby completing the installation of the combined joint.
Wherein, the straight bolt 23 is obliquely arranged relative to the side wall of the secondary lining segment 3.
Through the combined joint that this scheme provided, the area of the 3 joints of secondary lining section of jurisdiction pressed areas is assembled in the prefabrication when can effectively receive the bending greatly, reduces the prefabrication and assembles 3 joints local fracturing risks of secondary lining section of jurisdiction to reduce the external load effect down the prefabrication and assemble 3 joints of secondary lining section of jurisdiction open and then lead to connecting waterproof failure, prefabrication and assemble 3 joint position seepage emergence risks of secondary lining section of jurisdiction.
The above description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Claims (10)
1. A combined joint for reinforcing a secondary lining of a tunnel constructed by a mining method is characterized by comprising an extrados joint and an intrados joint, wherein the extrados joint comprises connecting grooves which are respectively arranged at the end parts of two opposite secondary lining segments, C-shaped members are respectively arranged at one sides of the connecting grooves, bolt holes are formed in the bottom surfaces of the C-shaped members, anchor bars penetrate through the bolt holes, and the C-shaped members are connected through H-shaped members; one end of the H-shaped component is abutted with the supporting component; the intrados connects including setting up respectively in the straight bolt hole and the hoop of two relative secondary lining section of jurisdiction tip and connecting the hand hole, and straight bolt hole and hoop connect the hand hole and be provided with straight bolt within a definite time.
2. The composite joint for reinforcing the secondary lining of the mine construction tunnel according to claim 1, wherein a plurality of anchor bars are arranged in parallel in the connecting groove.
3. The composite joint for mine method construction tunnel secondary lining reinforcement as recited in claim 2, wherein the length of the connecting groove is the sum of the lengths of the H-shaped member and the support member.
4. The composite joint for reinforcing the secondary lining of the mine construction tunnel according to claim 1, wherein the extrados joint is a horizontal pin joint, and the distances from the anchor bars on two sides to the side wall of the secondary lining segment are the same.
5. The composite joint for reinforcing the secondary lining of the mine construction tunnel according to claim 1, wherein a plurality of outward cambered surface joints and inward cambered surface joints are arranged on the two opposite secondary lining pipe sheets.
6. A method for installing the combined joint for reinforcing the secondary lining of the mine construction tunnel according to any one of claims 1 to 5, which is characterized by comprising the following steps of:
s1, arranging connecting grooves, C-shaped members, annular joint hand holes and straight bolt holes in the two secondary lining segments in advance;
s2, before the two secondary lining segments are assembled, a supporting member is arranged on one side, which is not provided with the C-shaped member, of the connecting groove;
s3, clamping one side of the H-shaped component with the C-shaped component on the secondary lining segment on one side until the end face of the H-shaped component is abutted against the supporting component;
s4, splicing the secondary lining segment provided with the H-shaped member and the secondary lining segment not provided with the H-shaped member in a staggered manner, so that the other side of the H-shaped member is clamped with another C-shaped member until the end face of the H-shaped member is abutted against the end face of the connecting groove at the rear side of the C-shaped member;
and S5, installing a straight bolt from the annular joint hand hole, thereby completing the installation of the combined joint.
7. The method for installing a composite joint for reinforcing a secondary lining of a mine construction tunnel according to claim 6, wherein the secondary lining segments of the arch wall lining are all prefabricated, and connecting grooves are reserved during prefabrication.
8. The method for installing the composite joint for reinforcing the secondary lining of the mine construction tunnel according to claim 7, wherein the anchor bars are installed in a positioned manner by means of C-shaped members.
9. The method for installing the composite joint for reinforcing the secondary lining of the mine construction tunnel according to claim 6, wherein the inverted arch lining segment is cast in place, and the C-shaped member, the supporting member and the anchor bar are embedded before casting.
10. The method for installing the composite joint for reinforcing the secondary lining of the mine construction tunnel according to claim 6, wherein the straight bolts are arranged obliquely with respect to the side wall of the secondary lining segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298049.9A CN111022072A (en) | 2019-12-17 | 2019-12-17 | Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298049.9A CN111022072A (en) | 2019-12-17 | 2019-12-17 | Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022072A true CN111022072A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911298049.9A Pending CN111022072A (en) | 2019-12-17 | 2019-12-17 | Combined joint for reinforcing secondary lining of tunnel constructed by mining method and mounting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022072A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691897A (en) * | 2020-05-20 | 2020-09-22 | 济南市市政工程设计研究院（集团）有限责任公司 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
| CN111852519A (en) * | 2020-07-15 | 2020-10-30 | 中国水利水电第四工程局有限公司 | Method for installing novel inverted arch precast block capable of improving water resistance between joints |
| CN112483123A (en) * | 2020-11-30 | 2021-03-12 | 中铁十二局集团第二工程有限公司 | Radial pushing and pressing fastening type shield segment joint and construction method |
| CN112983472A (en) * | 2021-03-10 | 2021-06-18 | 上海市隧道工程轨道交通设计研究院 | Duct piece connecting method |
| CN113338999A (en) * | 2021-07-07 | 2021-09-03 | 西南交通大学 | Tunnel supporting structure |
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| JPH08184296A (en) * | 1994-12-28 | 1996-07-16 | Minoru Yamamoto | Segment for lining tunnel |
| CN1472420A (en) * | 2003-04-28 | 2004-02-04 | 上海市隧道工程轨道交通设计研究院 | Method for lunnel lniing by double tube shields method |
| CN205805575U (en) * | 2016-05-31 | 2016-12-14 | 河南浩德电子科技有限公司 | A kind of tunnel duct piece of H type bolt-type joint |
| CN206360706U (en) * | 2016-11-24 | 2017-07-28 | 同济大学 | A kind of screwed joint attachment structure being used between extra-large shield-driven tunnel section of jurisdiction |
| CN107620598A (en) * | 2017-09-01 | 2018-01-23 | 同济大学 | A kind of shield tunnel lining segment and its reinforcement means |
-
2019
- 2019-12-17 CN CN201911298049.9A patent/CN111022072A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08184296A (en) * | 1994-12-28 | 1996-07-16 | Minoru Yamamoto | Segment for lining tunnel |
| CN1472420A (en) * | 2003-04-28 | 2004-02-04 | 上海市隧道工程轨道交通设计研究院 | Method for lunnel lniing by double tube shields method |
| CN205805575U (en) * | 2016-05-31 | 2016-12-14 | 河南浩德电子科技有限公司 | A kind of tunnel duct piece of H type bolt-type joint |
| CN206360706U (en) * | 2016-11-24 | 2017-07-28 | 同济大学 | A kind of screwed joint attachment structure being used between extra-large shield-driven tunnel section of jurisdiction |
| CN107620598A (en) * | 2017-09-01 | 2018-01-23 | 同济大学 | A kind of shield tunnel lining segment and its reinforcement means |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691897A (en) * | 2020-05-20 | 2020-09-22 | 济南市市政工程设计研究院（集团）有限责任公司 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
| CN111691897B (en) * | 2020-05-20 | 2022-02-08 | 济南市市政工程设计研究院（集团）有限责任公司 | Inverted arch segment, tunnel inverted arch structure and secondary lining construction method |
| CN111852519A (en) * | 2020-07-15 | 2020-10-30 | 中国水利水电第四工程局有限公司 | Method for installing novel inverted arch precast block capable of improving water resistance between joints |
| CN112483123A (en) * | 2020-11-30 | 2021-03-12 | 中铁十二局集团第二工程有限公司 | Radial pushing and pressing fastening type shield segment joint and construction method |
| CN112483123B (en) * | 2020-11-30 | 2023-03-07 | 中铁十二局集团第二工程有限公司 | Radial pushing and pressing fastening type shield segment joint and construction method |
| CN112983472A (en) * | 2021-03-10 | 2021-06-18 | 上海市隧道工程轨道交通设计研究院 | Duct piece connecting method |
| CN113338999A (en) * | 2021-07-07 | 2021-09-03 | 西南交通大学 | Tunnel supporting structure |
| CN113338999B (en) * | 2021-07-07 | 2023-09-15 | 西南交通大学 | Tunnel supporting structure |
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Application publication date: 20200417 |
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