CN204960946U - Prevention tunnel subsides supporting construction of deformation - Google Patents
Prevention tunnel subsides supporting construction of deformation Download PDFInfo
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- CN204960946U CN204960946U CN201520556997.9U CN201520556997U CN204960946U CN 204960946 U CN204960946 U CN 204960946U CN 201520556997 U CN201520556997 U CN 201520556997U CN 204960946 U CN204960946 U CN 204960946U
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Abstract
The utility model relates to a prevention tunnel subsides supporting construction of deformation. The long tube canopy and alternately median septum method excavation generally adopt uniform section tunnel construction because the triangular space soil body between pipe canopy and the preliminary bracing causes the preliminary bracing can not closely connected long tube canopy, unfavorable to long tube canopy and preliminary bracing combination atress. The utility model discloses an annular permanent steel bow member in the tunnel, permanent steel bow member vertically comprises the multiple ring variable cross section unit of parallel along the tunnel, and the vertical section is the cockscomb structure, be provided with interim steel bow member between the subregion pilot tunnel, permanent steel bow member hunch portion has evenly arranged the long tube canopy in the top, the slip casting ductule has evenly been arranged outward to permanent steel bow member both sides side wall. The utility model discloses the tunnel vertically adopts the variable cross section form, and the long tube canopy can be hugged closely in the preliminary bracing, and combined supporting between them effect can be controlled strongly and subside, the structure process is simple, and the operating space is big, is favorable to the mechanized construction and avoids construction cost to increase.
Description
Technical field
The utility model belongs to tunnel support technical field, is specifically related to a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape.
Background technology
In the weak surrounding rock that geological conditions is poor, build tunnel, the key that larger sedimentation and deformation is design, construction occurs in the middle of prevention construction.Large at tunnel cross-section, buried depth is shallow, to settlement Control have be strict with and adopt mechanized construction, adopting long pipe shed and intersecting median septum method excavation is a kind of conventional scheme.Long pipe shed advance support intensity is large, and adopts intersection median septum method to carry out partial excavation, can ensure that each pilot tunnel supporting is closed into ring in time and is conducive to mechanized construction.But the uniform section tunnel of conventional design causes preliminary bracing can not closely connected long pipe shed owing to there is trigonum between pipe canopy and preliminary bracing, to long pipe shed and preliminary bracing combination stressed unfavorable; In addition, construction period trigonum the soil body due to excavation vibrations and slump need increase sprayed mortar, this will cause construction cost to increase.
Summary of the invention
The purpose of this utility model is to provide a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape, and is applicable to the weak surrounding rock that geological conditions is poor, comprises soil property, expansive rock etc.
The technical scheme that the utility model adopts is:
Prevent the supporting and protection structure that tunnel subsidence is out of shape, it is characterized in that:
Comprise the permanent steel arch-shelf of ring-type in tunnel, permanent steel arch-shelf is longitudinally made up of parallel many rings variable cross-section unit along tunnel, vertical section indentation;
Long pipe shed has been evenly arranged above permanent steel arch-shelf arch;
Slip casting ductule has been evenly arranged outside the abutment wall of permanent steel arch-shelf both sides.
Permanent steel arch-shelf is i iron or H profile steel;
The permanent steel arch-shelf of every ring is longitudinally faced upward, and forms variable cross-section unit;
The afterbody that long pipe shed originates in the permanent steel arch-shelf of every ring sets, and outer limb is consistent with the longitudinal elevation angle of permanent steel arch-shelf, and longitudinal length is the longitudinal length of the permanent steel arch-shelf of two rings.
Permanent steel arch-shelf is arranged symmetrically with the longitudinal joist of twice, has been positioned at bottom, both sides, permanent steel arch-shelf arch;
The longitudinal joist of per pass is welded to form by longitudinal joist junction steel plate by multistage channel-section steel;
Single Pin steel arch-shelf of every section of channel-section steel and correspondence position is bolted to connection.
In tunnel excavation be divided into left pilot tunnel of topping bar, right pilot tunnel of topping bar, get out of a predicament or an embarrassing situation left pilot tunnel and right pilot tunnel of getting out of a predicament or an embarrassing situation, every district boundary arranges temporary steel bow member, comprises stull and perpendicular support;
Temporary steel bow member is i iron or H profile steel.
Junction between temporary steel bow member and between temporary steel bow member and permanent steel arch-shelf is provided with oblique steel arch-shelf stiffening rib;
Steel arch-shelf stiffening rib is i iron or H profile steel.
Slip casting ductule is arranged in outside the abutment wall of permanent steel arch-shelf both sides radially, and between adjacent two Pin steel arch-shelf, longitudinal pitch is the design pitch of twice steel arch-shelf.
Bottom, both sides, permanent steel arch-shelf arch symmetry has set lock foot anchoring stock.
The utility model has the following advantages:
(1) construct workable:
Working procedure is simple, and construction space is large, and mechanization degree is high, can raise labour efficiency;
(2) settlement Control is effective:
Adopt long pipe shed advance support intensity large, it is strong that pipe canopy combined support ability is close in preliminary bracing, and steel arch-shelf end of topping bar arranges longitudinal joist, and control settlement ability is strong;
(3) good economy performance:
The trigonum soil body between uniform section tunneltron canopy and tunnel is avoided to fall block and the concrete that needs to fill spray causes construction cost to increase.
Accompanying drawing explanation
Fig. 1 is the utility model cross-sectional drawing.
Fig. 2 is the utility model skiagraph.
Fig. 3 is the longitudinal connection layout of joist.
In figure, 1-tops bar left pilot tunnel, and 2-tops bar right pilot tunnel, and 3-gets out of a predicament or an embarrassing situation left pilot tunnel, and 4-gets out of a predicament or an embarrassing situation right pilot tunnel, 11-long pipe shed, 12-lock foot anchoring stock, 13-slip casting ductule, the permanent steel arch-shelf of 21-, 22-temporary steel bow member, 23-steel arch-shelf stiffening rib, the longitudinal joist of 31-, the longitudinal joist junction steel plate of 32-.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is described in detail.
The supporting and protection structure of the prevention tunnel subsidence distortion that the utility model relates to, adopts intersection median septum method excavation, tunnel is divided into 4 excavations, left pilot tunnel of namely topping bar, right pilot tunnel of topping bar, get out of a predicament or an embarrassing situation left pilot tunnel and right pilot tunnel of getting out of a predicament or an embarrassing situation.
Supporting and protection structure comprises the permanent steel arch-shelf 21 of ring-type in tunnel, permanent steel arch-shelf 21 is longitudinally made up of parallel many rings variable cross-section unit along tunnel, vertical section indentation, long pipe shed 11 has been evenly arranged above permanent steel arch-shelf 21 arch, be evenly arranged slip casting ductule 13 outside the abutment wall of permanent steel arch-shelf 21 both sides, bottom, both sides, permanent steel arch-shelf 21 arch symmetry has set lock foot anchoring stock 12.
Permanent steel arch-shelf 21 is i iron or H profile steel, and the permanent steel arch-shelf 21 of every ring is longitudinally faced upward, and forms variable cross-section unit.The afterbody that long pipe shed 11 originates in the permanent steel arch-shelf 21 of every ring sets, and outer limb is consistent with the permanent longitudinal elevation angle of steel arch-shelf 21, and longitudinal length is the longitudinal length of the permanent steel arch-shelf 21 of two rings.
Permanent steel arch-shelf 21 is arranged symmetrically with the longitudinal joist 31 of twice, be positioned at bottom, both sides, permanent steel arch-shelf 21 arch, the longitudinal joist 31 of per pass is welded to form by longitudinal joist junction steel plate 32 by multistage channel-section steel, and single Pin steel arch-shelf of every section of channel-section steel and correspondence position is bolted to connection.
The left pilot tunnel 1 of topping bar, the right pilot tunnel 2 of topping bar that excavate in tunnel, get out of a predicament or an embarrassing situation left pilot tunnel 3 and right pilot tunnel 4 of getting out of a predicament or an embarrassing situation, every district boundary arranges temporary steel bow member 22, and comprise stull and perpendicular support, temporary steel bow member 22 is i iron or H profile steel.
Junction between temporary steel bow member 22 and between temporary steel bow member 22 and permanent steel arch-shelf 21 is provided with oblique steel arch-shelf stiffening rib 23, and steel arch-shelf stiffening rib 23 is i iron or H profile steel.
Slip casting ductule 13 is arranged in outside the abutment wall of permanent steel arch-shelf 21 both sides radially, and between adjacent two Pin steel arch-shelf, longitudinal pitch is the design pitch of twice steel arch-shelf.
The construction process of the supporting and protection structure of above-mentioned prevention tunnel subsidence distortion, is characterized in that:
Realized by following steps:
Step one: the long pipe shed 11 performing left pilot tunnel 1 arch of topping bar, pipe canopy length is the longitudinal length of two variable cross-section unit;
Step 2: the left pilot tunnel 1 that carries out topping bar excavate and supporting until complete a variable cross-section unit;
Supporting content comprises sprayed mortar, hangs steel mesh reinforcement, also comprises the permanent steel arch-shelf in this region 21, temporary steel bow member 22, steel arch-shelf stiffening rib 23, the installation of longitudinal joist 31 and setting of lock foot anchoring stock 12;
Step 3: repeat step one and two, until left pilot tunnel 1 of topping bar completes seven variable cross-section unit;
Step 4: the long pipe shed 11 performing right pilot tunnel 2 arch of topping bar;
Step 5: the right pilot tunnel 2 that carries out topping bar excavate and supporting until complete a variable cross-section unit;
Supporting content comprises sprayed mortar, hangs steel mesh reinforcement, also comprises the permanent steel arch-shelf in this region 21, temporary steel bow member 22, steel arch-shelf stiffening rib 23, the installation of longitudinal joist 31 and setting of lock foot anchoring stock 12;
Step 6: repeat step 4 and five, until right pilot tunnel 2 of topping bar completes three variable cross-section unit;
Step 7: the left pilot tunnel 3 that carries out getting out of a predicament or an embarrassing situation excavate and supporting until complete two variable cross-section unit;
Supporting content comprises sprayed mortar, hangs steel mesh reinforcement, installs the permanent steel arch-shelf 21 in this region, temporary steel bow member 22 and steel arch-shelf stiffening rib 23, also comprises the slip casting ductule 13 implementing abutment wall;
Step 8: the right pilot tunnel 4 that carries out getting out of a predicament or an embarrassing situation excavate and supporting until complete a variable cross-section unit;
Supporting content comprises sprayed mortar, hangs steel mesh reinforcement, installs the permanent steel arch-shelf 21 in this region, also comprises the slip casting ductule 13 implementing abutment wall;
Step 9: when keep topping bar left pilot tunnel 1, right pilot tunnel 2 of topping bar, get out of a predicament or an embarrassing situation left pilot tunnel 3 and get out of a predicament or an embarrassing situation that between right each pilot drift of pilot tunnel 4, fore-and-aft distance is constant, namely top bar left pilot tunnel 1, top bar between right pilot tunnel 2 keep four variable cross-section unit, top bar left pilot tunnel 1, get out of a predicament or an embarrassing situation between left pilot tunnel 3 keep five variable cross-section unit, top bar left pilot tunnel 1, getting out of a predicament or an embarrassing situation between right pilot tunnel 4 keeps six variable cross-section unit, repeat abovementioned steps and carry out the pipe canopy of four pilot tunnels, excavation and supporting construction;
Step 10: treat that permanent steel arch-shelf 21 is closed into ring and removes temporary steel bow member after stabilization, and carry out according to the order of first removing stull, support is erected in rear dismounting, carry out inverted arch, lining construction afterwards.
The longitudinal length of a variable cross-section unit is 7.45m, and steel arch-shelf design pitch is 0.62m, and single row of tubes canopy length is 15m, and lining template trolley for baffle length is 11.25m, and every plate adjoining rock is 11.175m(i.e. 1.5 times of variable cross-section element lengths).
Content of the present utility model is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading the utility model manual to any equivalence that technical solutions of the utility model are taked, is claim of the present utility model and contains.
Claims (7)
1. a supporting and protection structure of preventing tunnel subsidence to be out of shape, is characterized in that:
Comprise the permanent steel arch-shelf (21) of ring-type in tunnel, permanent steel arch-shelf (21) is longitudinally made up of parallel many rings variable cross-section unit along tunnel, vertical section indentation;
Long pipe shed (11) has been evenly arranged above permanent steel arch-shelf (21) arch;
Slip casting ductule (13) has been evenly arranged outside the abutment wall of permanent steel arch-shelf (21) both sides.
2. a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape according to claim 1, is characterized in that:
Permanent steel arch-shelf (21) is i iron or H profile steel;
The permanent steel arch-shelf of every ring (21) is longitudinally faced upward, and forms variable cross-section unit;
The afterbody that long pipe shed (11) originates in the permanent steel arch-shelf of every ring (21) sets, and outer limb is consistent with permanent steel arch-shelf (21) longitudinal elevation angle, and longitudinal length is the longitudinal length of the permanent steel arch-shelf of two ring (21).
3. a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape according to claim 2, is characterized in that:
Permanent steel arch-shelf (21) is arranged symmetrically with the longitudinal joist (31) of twice, has been positioned at bottom, permanent steel arch-shelf (21) both sides, arch;
The longitudinal joist (31) of per pass is welded to form by longitudinal joist junction steel plate (32) by multistage channel-section steel;
Single Pin steel arch-shelf of every section of channel-section steel and correspondence position is bolted to connection.
4. a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape according to claim 3, is characterized in that:
In tunnel excavation be divided into left pilot tunnel (1) of topping bar, right pilot tunnel (2) of topping bar, get out of a predicament or an embarrassing situation left pilot tunnel (3) and right pilot tunnel (4) of getting out of a predicament or an embarrassing situation, every district boundary arranges temporary steel bow member (22), comprises stull and perpendicular to support;
Temporary steel bow member (22) is i iron or H profile steel.
5. a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape according to claim 4, is characterized in that:
Junction between temporary steel bow member (22) and between temporary steel bow member (22) and permanent steel arch-shelf (21) is provided with oblique steel arch-shelf stiffening rib (23);
Steel arch-shelf stiffening rib (23) is i iron or H profile steel.
6. a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape according to claim 5, is characterized in that:
Slip casting ductule (13) is arranged in outside the abutment wall of permanent steel arch-shelf (21) both sides radially, and between adjacent two Pin steel arch-shelf, longitudinal pitch is the design pitch of twice steel arch-shelf.
7. a kind of supporting and protection structure of preventing tunnel subsidence to be out of shape according to claim 6, is characterized in that:
Bottom, permanent steel arch-shelf (21) both sides, arch symmetry has set lock foot anchoring stock (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520556997.9U CN204960946U (en) | 2015-07-29 | 2015-07-29 | Prevention tunnel subsides supporting construction of deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520556997.9U CN204960946U (en) | 2015-07-29 | 2015-07-29 | Prevention tunnel subsides supporting construction of deformation |
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| Publication Number | Publication Date |
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| CN204960946U true CN204960946U (en) | 2016-01-13 |
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| CN201520556997.9U Active CN204960946U (en) | 2015-07-29 | 2015-07-29 | Prevention tunnel subsides supporting construction of deformation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989421A (en) * | 2015-07-29 | 2015-10-21 | 中交第一公路勘察设计研究院有限公司 | Support structure for preventing settlement deformation of tunnels and construction method thereof |
| CN105507909A (en) * | 2016-02-23 | 2016-04-20 | 中国电建集团华东勘测设计研究院有限公司 | Section steel arch frame supporting method of tunnel |
| CN105804771A (en) * | 2016-05-11 | 2016-07-27 | 宁波市交通规划设计研究院有限公司 | Deformation coordination control method for soft flowable plasticity soil tunnel construction |
| CN106437782A (en) * | 2016-10-27 | 2017-02-22 | 中煤第三建设（集团）有限责任公司 | Support and protection structure for large-section railroad tunnel in V class surrounding rock and construction method of structure |
| CN107704675A (en) * | 2017-09-28 | 2018-02-16 | 中南大学 | Shed-pipe Advanced Support steel arch frame lock foot anchoring stock integration mechanics design methods and its model |
-
2015
- 2015-07-29 CN CN201520556997.9U patent/CN204960946U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989421A (en) * | 2015-07-29 | 2015-10-21 | 中交第一公路勘察设计研究院有限公司 | Support structure for preventing settlement deformation of tunnels and construction method thereof |
| CN105507909A (en) * | 2016-02-23 | 2016-04-20 | 中国电建集团华东勘测设计研究院有限公司 | Section steel arch frame supporting method of tunnel |
| CN105804771A (en) * | 2016-05-11 | 2016-07-27 | 宁波市交通规划设计研究院有限公司 | Deformation coordination control method for soft flowable plasticity soil tunnel construction |
| CN106437782A (en) * | 2016-10-27 | 2017-02-22 | 中煤第三建设（集团）有限责任公司 | Support and protection structure for large-section railroad tunnel in V class surrounding rock and construction method of structure |
| CN107704675A (en) * | 2017-09-28 | 2018-02-16 | 中南大学 | Shed-pipe Advanced Support steel arch frame lock foot anchoring stock integration mechanics design methods and its model |
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