CN113668392A - Construction method for large-inclination-angle tunnel type anchorage secondary lining support - Google Patents
Construction method for large-inclination-angle tunnel type anchorage secondary lining support Download PDFInfo
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- CN113668392A CN113668392A CN202110921165.2A CN202110921165A CN113668392A CN 113668392 A CN113668392 A CN 113668392A CN 202110921165 A CN202110921165 A CN 202110921165A CN 113668392 A CN113668392 A CN 113668392A
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- lining
- lining support
- support sheet
- type anchorage
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a construction method for a large-inclination tunnel type anchorage secondary lining support, which comprises the following steps: 1) manufacturing a plurality of secondary support sheet units, wherein each secondary support sheet unit is of an arch structure; 2) pouring the two-lining side walls, and embedding a plurality of brackets on each two-lining side wall, wherein the plurality of brackets are positioned on the same straight line; each bracket is provided with a jack, and the plurality of jacks jointly support a longitudinal adjusting beam arranged along the linear direction; 3) installing a second lining support: sequentially installing a plurality of second lining support sheet units, wherein two ends of each second lining support sheet unit are respectively connected to the longitudinal adjusting beams on the second lining side walls on two sides of the tunnel, and the plurality of second lining support sheet units are arranged at intervals; and after the installation of the two-lining support sheet unit on each construction section is finished, adjusting the elevation of the two-lining support sheet unit by adjusting the jack to finish the installation of the two-lining support. The construction method of the invention not only ensures the construction quality, but also improves the construction efficiency and saves the construction cost.
Description
Technical Field
The invention relates to a tunnel type anchorage construction technology, in particular to a construction method for a large-inclination-angle tunnel type anchorage secondary lining support, which is suitable for tunnel anchors with large buried depth, large inclination angle and long secondary lining and can meet the construction requirement of the tunnel anchor secondary lining in the current building construction process.
Background
Due to the spanning capability and the attractiveness of the suspension bridge, the suspension bridge construction in China is more and more in recent years, the construction of the tunnel type anchorage of the suspension bridge is one of key control contents of the suspension bridge construction, and the problems of accelerating the construction progress of the tunnel anchor and ensuring the supporting quality of the tunnel anchor are always the subjects of research of construction builders.
At present, the construction of the tunnel type anchorage two-lining support of the domestic suspension bridge is to assemble a steel arch frame with a full section of a tunnel anchor section in a tunnel, and because an operation surface in the tunnel is narrow, the support is heavy in mass, large machinery is difficult to normally operate in the tunnel, the height cannot be accurately adjusted, the installation error is large, the construction difficulty is large, and the thickness of a secondary lining is uneven, so that a construction method which is time-saving and labor-saving and can ensure the precision of the two-lining support is required at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a construction method of a tunnel type anchorage secondary lining support, which not only ensures the construction quality, but also improves the construction efficiency and saves the construction cost.
The technical scheme adopted by the invention is as follows: a construction method for a large-inclination tunnel type anchorage secondary lining support comprises the following steps:
Further, in step 1, the two-lining support piece unit comprises two vertical supports and a steel arch, and two ends of the steel arch are respectively and fixedly connected to the two vertical supports.
Furthermore, the steel arch is manufactured in sections and is formed by sequentially connecting a plurality of sections of steel arch monomers, and flange plates are arranged at two ends of each section of steel arch monomer and used for connecting the adjacent steel arch monomers.
Further, in step 2, the two lining side walls are poured to the design intersection line of the two lining vault and the two lining side walls.
Further, in the step 2, an included angle between the straight line and the horizontal line is smaller than an included angle between a design intersection line of the two-lining arch top and the two-lining side wall and the horizontal line.
Further, the bracket includes:
the back plate is arranged in parallel with the inner wall of the two lining side walls;
the anchoring steel bars are arranged on one side, facing the two lining side walls, of the back plate, and the anchoring steel bars and the back plate are embedded into the two lining side walls together; and the number of the first and second groups,
the top plate is arranged on one side, away from the two lining side walls, of the back plate, and the jack is arranged on the top plate.
Further, the bracket still includes:
the supporting plate is vertically arranged with the back plate and the top plate and is fixedly connected with the back plate and the top plate respectively;
the stiffening plate is arranged in parallel with the back plate and is perpendicular to the top plate, and the stiffening plate is fixedly connected to the bottom surface of the top plate; and the number of the first and second groups,
the fender head steel sheet, fender head steel sheet fixed connection be in on the top surface of roof, and, be located the bracket is close to on one side of anchor face behind the tunnel type anchorage, be used for preventing the jack gliding.
Further, step 3 further comprises:
step 3-1, arranging a winch outside a tunnel portal of the tunnel type anchorage, and arranging a pulley on a system anchor rod of the primary support; the two-lining support piece unit to be installed is transported to a designated position through a transport trolley, a steel wire rope of the winch bypasses the pulley and then is connected with the two-lining support piece unit to be installed, the two-lining support piece unit to be installed is hoisted to the longitudinal adjusting beam through the winch and the pulley, and the two-lining support piece unit is fixedly connected with the longitudinal adjusting beam;
step 3-2, sequentially installing all the two-lining support sheet units according to the method shown in the step 3-1, and after all the two-lining support sheet units in each construction section are installed, retesting the gradients of the two-lining support sheet units to ensure that the plane of each two-lining support sheet unit is parallel to the front anchor surface/the rear anchor surface of the tunnel anchor;
3-3, adjusting all jacks on the construction section together, so as to adjust the elevation of the two-lining support sheet unit until the concrete thickness at the arch top of the two lining is met;
and 3-4, connecting all the two lining support sheet units of one construction section into a whole through connecting rods which are vertically arranged on the plane of the two lining support sheet units, wherein the number of the connecting rods is multiple.
Further, in step 3-1, the hoisting the two lining support piece units to be installed onto the longitudinal adjusting beam through the winch and the pulley comprises: hoisting the vertical supports of the two lining support sheet units, fixedly connecting the vertical supports to the longitudinal adjusting beam, hoisting the steel arch single bodies of the two lining support sheet units in a segmented manner, and fixedly connecting each section of the steel arch single body with the adjacent steel arch single body or the vertical support through a flange plate and a bolt.
The invention has the beneficial effects that:
(1) the elevation of the two-lining support piece unit is adjusted by adjusting the jack on the bracket, the pouring thickness of the concrete of the two-lining vault can be accurately adjusted, the problem of uneven pouring thickness of the concrete of the two-lining vault is solved, and the construction quality is ensured.
(2) The length of the straight-line section part of the two-lining vault support is greatly reduced, materials are saved, the process is simple, the engineering progress is fast, the construction period is greatly shortened, the construction cost is saved, and the economic benefit is very obvious.
(3) The steel arch centering of the two lining support piece units is manufactured in sections and installed in sections, so that the installation weight is reduced, the overall rigidity and stability of the steel arch centering are improved, and the steel arch centering is convenient and reliable.
(4) The two-lining support is standardized and produced in sections and marked in a steel structure processing field, and the assembly precision is higher than that of integral manufacturing.
(5) The success of the construction of the tunnel type anchorage secondary lining support provides reliable decision basis and technical indexes for construction under similar conditions, the novel construction method technology promotes the progress of the construction technology of the tunnel anchor, and the social benefit is remarkable.
Drawings
FIG. 1: the invention is a schematic side overall structure of a two-lining bracket;
FIG. 2: the front structure of the two-lining bracket is schematic;
FIG. 3: the bracket of the invention has a schematic side structure;
FIG. 4: the front structure of the bracket of the invention is shown schematically (a-A section in figure 3);
FIG. 5: the back structure of the bracket of the invention is shown schematically (the section B-B in figure 3 is shown schematically);
FIG. 6: the hoisting schematic diagram of the two-lining support sheet unit is shown;
the attached drawings are marked as follows:
1-two liner support sheet unit; 1-vertical support;
1-2-steel arch frame; 2-longitudinal adjusting beam;
3-bracket; 3-1-anchoring the steel bar;
3-2-support plate; 3-a stiffening plate;
3-4-top plate; 3-5 — a back plate;
3-6-baffle head steel plate; 4-jack;
5-connecting rod; 6-the hoist;
6-1-wire rope; 7-transport trolley;
8-system anchor rod; 9-pulley;
w is a secondary lining side wall;
l is a design intersection line of the secondary lining arch top and the secondary lining side wall;
s1-front anchor face; s2-rear anchor face;
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 6, a construction method for a large-inclination tunnel type anchorage secondary lining support comprises the following steps:
step 2-1, after the reinforcing steel bars of the two lining side walls W are bound, measuring the top surface elevation point positions and the single surfaces of the corbels 3 at two sides by using a total station according to the calculated elevations, wherein the top surface elevation point positions and the single surfaces of the corbels 3 at the two lining side walls W are 3-4 of each construction section, the elevation points of the top plates 3-4 of the corbels 3 are all on the same straight line, the included angles of the straight line and the horizontal line are smaller than the included angles of the design cross-connecting line L and the horizontal line, namely, the straight line inclined angles are slower than the tunnel type anchor inclined angles, the original large inclined angles of the tunnel type anchors are adjusted to be small inclined angles, and the installation of the two lining supports is facilitated.
Step 2-2, pre-burying the bracket 3 into side wall steel bars according to measured point positions, pre-burying the back plate 3-5 and the anchoring steel bars 3-1 in the steel bars of the two-lining side wall W, and welding and fixing the back plate 3-5 and the anchoring steel bars 3-1 with the steel bars of the two-lining side wall W. The back plate 3-5 is flush with the concrete surface of the two lining side walls W or is recessed within 1cm of the concrete surface. And after the concrete of the two lining side walls W is poured, welding the support plates 3-2, the top plates 3-4 and the stiffening plates 3-3.
The specifications of the steel plate and the steel bar for manufacturing the bracket 3 are determined by the weight of the two-lining concrete and the weight of the two-lining bracket.
And 2-3, arranging the jack 4 on a top plate 3-4 of the bracket 3, and welding a retaining head steel plate 3-6 on the top plate 3-4 to prevent the jack 4 from sliding downwards.
And 2-4, placing the longitudinal adjusting beam 2 on the jack 4. The longitudinal adjusting beam 2 is installed in sections according to construction sections.
step 3-1, arranging a winch 6 at a distance from a tunnel portal of the tunnel type anchorage, and arranging a pulley 9 on a system anchor rod 8 of a primary support; the two-lining support piece unit 1 to be installed is transported to a designated position through a transport trolley 7, a steel wire rope 6-1 of the winch 6 is connected with the two-lining support piece unit 1 to be installed after bypassing the pulley 9, and the two-lining support piece unit 1 to be installed is hoisted to the longitudinal adjusting beam 2 through the winch 6 and the pulley 9. Firstly, hoisting the vertical supports 1-1 of the two lining support piece units 1, temporarily welding and fixing the vertical supports 1-1 on the longitudinal adjusting beam 2, and then hoisting the steel arch single bodies of the two lining support piece units 1 in a segmented manner, wherein each steel arch single body is fixedly connected with the adjacent steel arch single body or the vertical support 1-1 through a flange plate and a bolt.
And 3-2, sequentially installing all the two-lining support sheet units 1 according to the method shown in the step 3-1, and after all the two-lining support sheet units 1 in each construction section are installed, retesting the inclination of the two-lining support sheet units 1 by using a total station to ensure that the plane of each two-lining support sheet unit 1 is parallel to the front anchor surface S1/the rear anchor surface S2 of the tunnel anchor.
And 3-3, jointly adjusting all the jacks 4 on the construction section, so as to adjust the height of the two-lining support sheet unit 1 until the concrete thickness at the arch top of the two linings is met.
And 3-4, connecting all the two lining support sheet units 1 of one construction section into a whole through connecting rods 5 vertically arranged with the plane of the two lining support sheet units 1, wherein the number of the connecting rods 5 is multiple. The connecting rod 5 is connected with the two lining support sheet units 1 in a welding mode.
The actual size of the device is determined by the actual situation of a construction site.
The device can adapt to the construction of the tunnel anchor secondary lining support with a larger inclination angle, and ensures that the thickness, uniformity and the like of concrete poured on the secondary lining support meet the design requirements.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (9)
1. A construction method for a large-inclination tunnel type anchorage secondary lining support is characterized by comprising the following steps:
step 1, manufacturing a plurality of two-lining support sheet units (1), wherein each two-lining support sheet unit (1) is of an arch structure;
step 2, pouring two lining side walls (W) positioned at two sides of the tunnel in the tunnel of the tunnel type anchorage, and embedding a plurality of corbels (3) on the two lining side walls (W) at each side, wherein the plurality of corbels (3) are positioned on the same straight line; a jack (4) is arranged on each bracket (3), and the plurality of jacks (4) jointly support the longitudinal adjusting beam (2) arranged along the linear direction;
step 3, mounting a secondary lining support: the method comprises the following steps that a plurality of two-lining support sheet units (1) are sequentially installed, two ends of each two-lining support sheet unit (1) are respectively connected to longitudinal adjusting beams (2) on two-lining side walls (W) on two sides of a tunnel, and the two-lining support sheet units (1) are arranged at intervals; after the installation of the two lining support sheet units (1) on each construction section is completed, the elevation of the two lining support sheet units (1) is adjusted by adjusting all the jacks (4) on the construction section, and the installation of the two lining supports is completed.
2. The construction method for the large-inclination tunnel type anchorage second-lining support according to claim 1, wherein in the step 1, the second-lining support piece unit (1) comprises two vertical supports (1-1) and one steel arch (1-2), and two ends of the steel arch (1-2) are respectively and fixedly connected to the two vertical supports (1-1).
3. The construction method for the large-inclination tunnel type anchorage secondary lining support according to claim 2, characterized in that the steel arch (1-2) is made in sections and is formed by connecting a plurality of sections of steel arch monomers in sequence, and flange plates are arranged at two ends of each section of steel arch monomer for connecting the adjacent steel arch monomers.
4. The construction method for the large-inclination tunnel type anchorage secondary lining support according to claim 1, characterized in that the secondary lining side wall (W) is poured to a design intersection line (L) of a secondary lining dome and the secondary lining side wall.
5. The construction method for the large-inclination-angle tunnel type anchorage secondary lining support as claimed in claim 4, wherein in the step 2, the included angle between the straight line and the horizontal line is smaller than the included angle between the design intersection line (L) of the secondary lining vault and the secondary lining side wall and the horizontal line.
6. The construction method for a high-inclination tunnel-type anchorage secondary lining support according to claim 1, characterized in that the corbel (3) comprises:
the back plate (3-5) is arranged in parallel with the inner wall of the two lining side walls (W);
the anchoring steel bars (3-1) are arranged on one side, facing the two lining side walls (W), of the back plate (3-5), and the anchoring steel bars (3-1) and the back plate (3-5) are pre-buried into the two lining side walls (W) together; and the number of the first and second groups,
the top plate (3-4), the top plate (3-4) is arranged on one side, away from the two lining side walls (W), of the back plate (3-5), and the jack (4) is arranged on the top plate (3-4).
7. The construction method for a high-inclination tunnel type anchorage secondary lining support according to claim 6, characterized in that the corbel (3) further comprises:
the supporting plate (3-2), the back plate (3-5) and the top plate (3-4) are vertically arranged, and the supporting plate (3-2) is fixedly connected with the back plate (3-5) and the top plate (3-4) respectively;
the stiffening plates (3-3) are arranged in parallel with the back plates (3-5) and are arranged perpendicular to the top plates (3-4), and the stiffening plates (3-3) are fixedly connected to the bottom surfaces of the top plates (3-4); and the number of the first and second groups,
the retaining head steel plate (3-6), retaining head steel plate (3-6) fixed connection be in on the top surface of roof (3-4), and, be located bracket (3) are close to on one side of anchor face (S2) behind the tunnel type anchorage, be used for preventing jack (4) gliding.
8. The construction method for the large-inclination tunnel type anchorage secondary lining support according to claim 1, wherein the step 3 further comprises:
step 3-1, arranging a winch (6) outside a tunnel portal of the tunnel type anchorage, and arranging a pulley (9) on a system anchor rod (8) of the primary support; the two-lining support piece unit (1) to be installed is transported to a designated position through a transport trolley (7), a steel wire rope (6-1) of the winch (6) bypasses the pulley (9) and then is connected with the two-lining support piece unit (1) to be installed, the two-lining support piece unit (1) to be installed is hoisted to the longitudinal adjusting beam (2) through the winch (6) and the pulley (9), and the two-lining support piece unit (1) is fixedly connected with the longitudinal adjusting beam (2);
step 3-2, sequentially installing all the two-lining support sheet units (1) according to the method shown in the step 3-1, and after all the two-lining support sheet units (1) in each construction section are installed, retesting the inclination of the two-lining support sheet units (1) to ensure that the plane where each two-lining support sheet unit (1) is located is parallel to the front anchor surface (S1)/the rear anchor surface (S2) of the tunnel anchor;
3-3, adjusting all jacks (4) on the construction section together, so as to adjust the elevation of the two-lining support sheet unit (1) until the concrete thickness at the arch top of the two lining is met;
and 3-4, connecting all the two lining support sheet units (1) of one construction section into a whole through connecting rods (5) vertically arranged on the plane where the two lining support sheet units (1) are located, wherein the connecting rods (5) are provided with a plurality of parts.
9. The construction method for the large-inclination tunnel type anchorage second-lining support according to claim 8, wherein in step 3-1, the hoisting of the second-lining support piece unit (1) to be installed onto the longitudinal adjusting beam (2) through the winch (6) and the pulley (9) comprises: hoisting vertical supports (1-1) of the two lining support piece units (1), fixedly connecting the vertical supports (1-1) to the longitudinal adjusting beam (2), hoisting steel arch monomers of the two lining support piece units (1) in a segmented manner, and fixedly connecting each section of the steel arch monomer with the adjacent steel arch monomer or the vertical support (1-1) through a flange plate and a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921165.2A CN113668392B (en) | 2021-08-11 | 2021-08-11 | Construction method for large-inclination-angle tunnel type anchorage secondary lining support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921165.2A CN113668392B (en) | 2021-08-11 | 2021-08-11 | Construction method for large-inclination-angle tunnel type anchorage secondary lining support |
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| Publication Number | Publication Date |
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| CN113668392A true CN113668392A (en) | 2021-11-19 |
| CN113668392B CN113668392B (en) | 2023-02-21 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060823A (en) * | 2017-04-11 | 2017-08-18 | 中铁二十局集团第三工程有限公司 | Tunnel anchorage section two serves as a contrast concrete construction without dismounting chassis |
| CN107227686A (en) * | 2017-05-19 | 2017-10-03 | 中国建筑第六工程局有限公司 | A kind of tunnel-type anchorage pre-stress system locating support construction method |
| CN108952759A (en) * | 2018-06-27 | 2018-12-07 | 昆明理工大学 | A kind of tunnel lining structure and construction method using concrete filled steel tube and superimposed sheet |
| CN211201989U (en) * | 2019-12-03 | 2020-08-07 | 中铁二十局集团第六工程有限公司 | Sleeve lining for tunnel secondary lining renovation construction |
| CN111622781A (en) * | 2020-06-11 | 2020-09-04 | 中交二公局第二工程有限公司 | Construction equipment and method for suspension bridge tunnel anchor chamber vault secondary lining |
| JP2021059933A (en) * | 2019-10-09 | 2021-04-15 | 藤森工業株式会社 | Waterproof sheet for tunnel |
-
2021
- 2021-08-11 CN CN202110921165.2A patent/CN113668392B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060823A (en) * | 2017-04-11 | 2017-08-18 | 中铁二十局集团第三工程有限公司 | Tunnel anchorage section two serves as a contrast concrete construction without dismounting chassis |
| CN107227686A (en) * | 2017-05-19 | 2017-10-03 | 中国建筑第六工程局有限公司 | A kind of tunnel-type anchorage pre-stress system locating support construction method |
| CN108952759A (en) * | 2018-06-27 | 2018-12-07 | 昆明理工大学 | A kind of tunnel lining structure and construction method using concrete filled steel tube and superimposed sheet |
| JP2021059933A (en) * | 2019-10-09 | 2021-04-15 | 藤森工業株式会社 | Waterproof sheet for tunnel |
| CN211201989U (en) * | 2019-12-03 | 2020-08-07 | 中铁二十局集团第六工程有限公司 | Sleeve lining for tunnel secondary lining renovation construction |
| CN111622781A (en) * | 2020-06-11 | 2020-09-04 | 中交二公局第二工程有限公司 | Construction equipment and method for suspension bridge tunnel anchor chamber vault secondary lining |
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| CN113668392B (en) | 2023-02-21 |
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