CN110566228B - Tunnel middle partition wall with repeated supporting and locking functions and construction method thereof - Google Patents
Tunnel middle partition wall with repeated supporting and locking functions and construction method thereof Download PDFInfo
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- CN110566228B CN110566228B CN201910906596.4A CN201910906596A CN110566228B CN 110566228 B CN110566228 B CN 110566228B CN 201910906596 A CN201910906596 A CN 201910906596A CN 110566228 B CN110566228 B CN 110566228B
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 238000005192 partition Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000009412 basement excavation Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 8
- 230000002146 bilateral effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 241001270131 Agaricus moelleri Species 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/14—Lining predominantly with metal
-
- 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)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel construction, in particular to a tunnel middle partition wall with repeated supporting and locking functions and a construction method thereof, wherein the repeated supporting and locking mechanisms are arranged on a tunnel middle partition wall steel frame; the repeated supporting and locking mechanism consists of a jack, a first angle steel, a jackscrew and a second angle steel; the upper end and the lower end of the jack are respectively fixed on the upper and the lower first angle steel; the upper section and the lower section of each longitudinal beam of the tunnel partition steel frame are fixedly provided with second angle steel through bolt connection, the second angle steel is arranged adjacent to the first angle steel, and the upper end and the lower end of the jackscrew are fixedly arranged in the upper second angle steel and the lower second angle steel through nut connection respectively. The arch crown and ground subsidence in the tunnel excavation process can be effectively controlled, and meanwhile, the problem of larger stress of the primary support structure caused by larger load on the upper part of the tunnel can be solved.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a tunnel middle partition wall with repeated supporting and locking functions and a construction method thereof.
Background
In recent years, with the rapid increase of national economy, urban rail transit construction across the country has been rapidly developed. For cities of Beijing, guangzhou, shanghai and the like which are early subjected to subway construction, along with encryption of a rail transit network and increasing maturity of urban planning, the conditions of newly built rail transit projects penetrating various large municipal pipelines, existing stations, sections and other built structures are increased, and the construction environments of subways are more severe. The construction of subway crossing engineering inevitably causes deformation of surrounding stratum, thereby causing deformation and additional stress of the existing engineering and affecting operation and structural safety. The arch crown settlement in the new construction excavation process is controlled, and the deformation and additional stress of the existing structure are avoided, so that the existing structure is the main difficulty and obstacle faced by the current subway construction. The larger load at the upper part of the tunnel makes the primary support structure bear larger force, and the traditional method resists larger internal force by thickening the thickness of the primary support, which is not economical enough. It is therefore necessary to innovate the prior art.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides the tunnel middle partition wall with the functions of repeated supporting and locking and the construction method thereof, which are reasonable in design, can effectively control the vault and ground subsidence in the tunnel excavation process, can also improve the problem of larger stress of a primary supporting structure caused by larger load on the upper part of the tunnel, and particularly can strictly control the deformation of the existing structure when the tunnel is excavated to pass through construction structures such as subways, railways, bridges, houses and the like and underground pipelines which are sensitive to subsidence deformation, thereby ensuring the safety and safety of the existing structure.
In order to achieve the above purpose, the tunnel middle partition wall with repeated supporting and locking functions in the invention comprises a tunnel middle partition wall steel frame, repeated supporting and locking mechanisms; the repeated supporting and locking mechanism is arranged on a partition steel frame in the tunnel; the repeated supporting and locking mechanism consists of a jack, a first angle steel, a jackscrew and a second angle steel; the upper end and the lower end of the jack are respectively fixed on the upper and the lower first angle steel; the upper section and the lower section of each longitudinal beam of the tunnel partition steel frame are fixedly provided with second angle steel through bolt connection, the second angle steel is arranged adjacent to the first angle steel, and the upper end and the lower end of the jackscrew are fixedly arranged in the upper second angle steel and the lower second angle steel through nut connection respectively.
Further, an auxiliary jack is fixed on one side wall of the tunnel middle partition steel frame, which is opposite to one of the clarion steel, by utilizing one of the clarion steel.
Further, a jack is arranged between every two primary supporting structures on the partition wall steel frame in the tunnel.
The construction method of the tunnel partition wall with repeated supporting and locking functions comprises the following operation steps:
1. excavating the right upper section of the tunnel, erecting a primary support structure in time, and paving an arch advanced small duct;
2. after primary supporting structures of a plurality of trusses are formed according to actual needs, two angle steels are longitudinally welded on a middle partition wall to serve as a mounting base and a jacking fulcrum of a jack, and the jack is mounted to form a supporting mechanism;
3. timely and properly jacking according to the monitoring condition, locking by jackscrews in time after jacking is finished, taking out the jack, vertically supporting the re-spraying concrete, and not spraying the concrete in the jacking area of the jack so as to facilitate subsequent jacking again according to the monitoring condition;
4. according to the construction method, excavating a right lower section and a left upper section at intervals, erecting a primary support structure in time and paving an arch part advanced small guide pipe, and erecting an auxiliary jack according to the monitoring condition if necessary, wherein the erection method is the same as the second step so as to ensure the effect of bilateral jacking;
5. and excavating and supporting other parts of the tunnel section according to the construction method to finish the excavation and the supporting of the tunnel section.
In the first step, when the section of the tunnel is a round, flat-top straight wall rectangular section, a temporary tunnel inverted arch is arranged between the partition steel frame and the primary support structure.
After adopting the structure, the invention has the beneficial effects that: the invention provides a tunnel middle partition wall with repeated supporting and locking functions and a construction method thereof, which can effectively control vault and ground subsidence in the tunnel excavation process, can also improve the problem of larger stress of a primary supporting structure caused by larger load on the upper part of the tunnel, and can strictly control the deformation of the existing structure when a hidden tunnel passes through a subway, a railway, a bridge, a house and other building structures and underground pipelines which are sensitive to subsidence deformation, thereby ensuring the safety and safety of the existing structure.
Description of the drawings:
fig. 1 is a construction installation schematic of the first embodiment.
Fig. 2 is a construction installation schematic diagram of a second embodiment.
Fig. 3 is a construction installation schematic of the third embodiment.
Fig. 4 is a schematic view of the structure of the repeating prop and lock mechanism of the present invention.
Fig. 5 is a side view of the repeating roof and locking mechanism of the present invention.
Fig. 6 is a construction diagram of a first step of the construction method according to the present invention.
FIG. 7 is a sectional view of a construction step II of the construction method of the present invention.
Fig. 8 is a construction side view of a construction method step two in the present invention.
Fig. 9 is a construction cross-sectional view of the third construction method step of the present invention.
Fig. 10 is a side view of the construction of step three of the construction method of the present invention.
Fig. 11 is a construction diagram of a construction method step four in the present invention.
Fig. 12 is a construction diagram of a fifth construction method step of the present invention.
Reference numerals illustrate:
primary support structure 1, tunnel middle partition steel frame 2, tunnel temporary inverted arch 3, repeated supporting and locking mechanism 4, jack 5, angle steel No. 6, jackscrew 7, angle steel No. 8 and auxiliary jack 9.
The specific embodiment is as follows:
the following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and fig. 4-fig. 12, the construction tunnel of the present embodiment (example one) is a circular section, and the tunnel middle partition wall with repeated supporting and locking functions comprises a tunnel middle partition wall steel frame 2 and a repeated supporting and locking mechanism 4; the repeated supporting and locking mechanism 4 is arranged on the partition steel frame 2 in the tunnel; the repeated supporting and locking mechanism 4 consists of a jack 5, a first angle steel 6, a jackscrew 7 and a second angle steel 8; the upper end and the lower end of the jack 5 are respectively propped against the upper and the lower angle steel 6 (one jack 5 is arranged between every three primary supporting structures on the partition wall steel frame 2 in the tunnel); an auxiliary jack 9 is fixed on the opposite side wall of one side wall of the partition steel frame 2 in the tunnel provided with the jack 5 by utilizing a first angle steel 6; the upper section and the lower section of each longitudinal beam of the tunnel partition steel frame 2 are fixedly provided with second angle steel 8 through bolt connection, the second angle steel 8 is arranged adjacent to the first angle steel 6, and the upper end and the lower end of the jackscrew 7 are respectively connected and fixed in the upper second angle steel 8 and the lower second angle steel 8 through nuts.
The construction method of the partition wall in the tunnel with repeated supporting and locking functions in the embodiment comprises the following operation steps:
1. excavating a right upper section I of a tunnel, erecting a primary support structure 1 in time, paving an arch part leading small guide pipe, and arranging a tunnel temporary inverted arch 3 between a tunnel middle partition steel frame 2 and the primary support structure 1 (arranging a foot locking anchor pipe at the junction of the primary support structure 1, the tunnel middle partition steel frame 2 and the tunnel temporary inverted arch 3);
2. after the primary supporting structure 1 of three roof truss frames (or according to actual needs) is completed, two first angle steels 6 are longitudinally welded on the middle partition wall and serve as a mounting base and a lifting fulcrum of the jack 5, and the jack 5 is mounted to form a supporting mechanism;
3. according to the monitoring condition, timely and properly jacking, locking by jackscrews 7 in time after jacking is finished, taking out the jack 5, vertically supporting three (or according to actual needs) truss concrete by re-spraying, and erecting the jack to jack the jacking area without spraying concrete so as to conveniently jack again according to the monitoring condition;
4. according to the construction method, excavating a right lower section II and a left upper section III at intervals, erecting a primary support structure 1 and paving arch advanced small pipes in time, and erecting an auxiliary jack 9 according to the monitoring condition if necessary, wherein the erection method is the same as the second step so as to ensure the effect of bilateral jacking;
5. and excavating and supporting other parts IV of the tunnel section according to a construction method, and finishing the excavation and the supporting of the tunnel section.
After adopting above-mentioned structure, this embodiment's beneficial effect is as follows:
1. at present, a technical scheme for directly and effectively controlling the post-sedimentation deformation of the vault is not available, and the sedimentation deformation of the vault can only be improved by means of other measures; the repeated supporting and locking devices are arranged on the partition wall in the tunnel, so that the vault can be lifted timely and appropriately, the vault settlement problem is solved, the structural deformation and additional stress of the traversing engineering are avoided, and the structural and operation safety of the tunnel is ensured;
2. the embodiment can repeatedly, timely and properly lift the vault in combination with the monitoring condition during construction, thereby realizing the real-time control of vault deformation during construction;
3. the embodiment is suitable for the construction of all underground tunnel with middle partition walls, and has wide application range;
4. the traditional measure for controlling the later deformation of the tunnel vault is mainly to increase support, has the defects of large engineering investment, complex working procedures, poor construction operation environment and the like, avoids the problems, and fully realizes the scientific development view of sustainable development.
Embodiment two:
referring to fig. 2, the construction tunnel of the present embodiment is a flat-top straight wall rectangular section, and the middle partition wall of the tunnel with repeated supporting and locking functions and the construction method thereof are the same as those of the first embodiment.
Embodiment III:
referring to fig. 3, the construction tunnel of this embodiment is an arch-shaped section, and the partition wall in the tunnel with repeated supporting and locking functions is the same as that of the first embodiment, and the construction steps are as follows:
1. excavating the right upper section of a tunnel, erecting a primary support structure 1 in time, and paving an arch advanced small duct;
2. after the primary supporting structure 1 of three roof truss frames (or according to actual needs) is completed, two first angle steels 6 are longitudinally welded on the middle partition wall and serve as a mounting base and a lifting fulcrum of the jack 5, and the jack 5 is mounted to form a supporting mechanism;
3. according to the monitoring condition, timely and properly jacking, locking by jackscrews 7 in time after jacking is finished, taking out the jack 5, vertically supporting three (or according to actual needs) truss concrete by re-spraying, and erecting the jack to jack the jacking area without spraying concrete so as to conveniently jack again according to the monitoring condition;
4. according to the construction method, excavating a right lower section and a left upper section at intervals, erecting a primary support structure 1 and paving arch advanced small pipes in time, and erecting an auxiliary jack 9 according to the monitoring condition if necessary, wherein the erection method is the same as the second step so as to ensure the effect of bilateral jacking;
5. and excavating and supporting other parts of the tunnel section according to the construction method to finish the excavation and the supporting of the tunnel section.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (3)
1. The utility model provides a wall in tunnel with repeated roof supporting and locking function which characterized in that: the device comprises a partition steel frame (2) in a tunnel, a repeated supporting and locking mechanism (4); the repeated supporting and locking mechanism (4) is arranged on the partition steel frame (2) in the tunnel; the repeated supporting and locking mechanism (4) consists of a jack (5), a first angle steel (6), a jackscrew (7) and a second angle steel (8); the upper end and the lower end of the jack (5) are respectively fixed on the upper and the lower angle steel (6); the upper section and the lower section of each longitudinal beam of the partition steel frame (2) in the tunnel are fixedly connected with second angle steel (8) by bolts, the second angle steel (8) is arranged adjacent to the first angle steel (6), and the upper end and the lower end of the jackscrew (7) are respectively connected and fixed in the upper second angle steel (8) and the lower second angle steel by nuts; an auxiliary jack (9) is fixed on one side wall, opposite to the first angle steel (6), of the partition steel frame (2) in the tunnel by the first angle steel (6); a jack (5) is arranged between every two primary supporting structures on the partition wall steel frame (2) in the tunnel.
2. A construction method of a partition wall in a tunnel with repeated supporting and locking functions is characterized by comprising the following steps: the operation steps are as follows:
firstly, excavating the right upper section of a tunnel, erecting a primary support structure in time, and paving an arch advanced small duct;
secondly, after each primary supporting structure of a plurality of frames is completed according to actual needs, two angle steels are longitudinally welded on the middle partition wall to serve as a mounting base and a jacking fulcrum of the jack, and the jack is mounted to form a supporting mechanism;
thirdly, carrying out timely and proper jacking according to the monitoring condition, locking by jackscrews in time after the jacking is finished, taking out the jack, vertically supporting the re-spraying concrete on the truss, and not spraying the concrete in the jacking area of the jack to facilitate the subsequent jacking again according to the monitoring condition;
fourthly, excavating a right lower section and a left upper section in a staggered way according to a construction method, erecting a primary support structure in time and paving an arch part advanced small guide pipe, and erecting an auxiliary jack according to monitoring conditions if necessary, wherein the erection method is the same as the second step so as to ensure the effect of bilateral jacking;
and fifthly, excavating and supporting other parts of the tunnel section according to a construction method to finish the excavation and the supporting of the tunnel section.
3. The construction method of the tunnel partition wall with repeated roof supporting and locking functions according to claim 2, wherein the construction method comprises the following steps: in the step (one), when the section of the tunnel is a round section, a flat-top straight wall rectangular section, a temporary tunnel inverted arch is arranged between a partition wall steel frame and a primary support structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910906596.4A CN110566228B (en) | 2019-09-24 | 2019-09-24 | Tunnel middle partition wall with repeated supporting and locking functions and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910906596.4A CN110566228B (en) | 2019-09-24 | 2019-09-24 | Tunnel middle partition wall with repeated supporting and locking functions and construction method thereof |
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| Publication Number | Publication Date |
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| CN110566228A CN110566228A (en) | 2019-12-13 |
| CN110566228B true CN110566228B (en) | 2024-02-09 |
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| CN210530851U (en) * | 2019-09-24 | 2020-05-15 | 中铁第六勘察设计院集团有限公司 | Tunnel middle partition wall with repeated supporting and locking functions |
-
2019
- 2019-09-24 CN CN201910906596.4A patent/CN110566228B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040102613A (en) * | 2003-05-28 | 2004-12-08 | 안태훈 | 2-arch tunnel method controlling the load of tunnel |
| CN101864959A (en) * | 2009-04-17 | 2010-10-20 | 中铁工程设计咨询集团有限公司 | Method for tunneling construction of main structure of underground station |
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| CN110566228A (en) | 2019-12-13 |
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