CN102345463A - Support structure for large-span shallow-buried underground tunnel in urban sensitive area - Google Patents
Support structure for large-span shallow-buried underground tunnel in urban sensitive area Download PDFInfo
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- CN102345463A CN102345463A CN2011103288430A CN201110328843A CN102345463A CN 102345463 A CN102345463 A CN 102345463A CN 2011103288430 A CN2011103288430 A CN 2011103288430A CN 201110328843 A CN201110328843 A CN 201110328843A CN 102345463 A CN102345463 A CN 102345463A
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Abstract
The invention provides a support structure for a large-span underground tunnel in an urban sensitive area. By adopting the support structure, the problem on constructing the large-span underground tunnel in the urban sensitive area can be effectively solved by only adding a certain number of prestress anchor cables on a tunnel constructed based on a construction principle of the conventional new Austrian tunnelling method. The support structure comprises the prestress anchor cables, a primary-support structural steel arch frame, an anchoring pad structure, preset anchor holes, sprayed concrete, a waterproof layer, secondary-lining concrete and the like. Generally, compared with the support structure of the tunnel constructed by using the principle of the conventional new Austrian tunnelling method, the support structure provided by the invention the characteristics of better feasibility, lowered risk, reduced construction cost, less investment, obvious effect, simple process, easiness for popularization and application, and the like.
Description
Technical field
Patent of the present invention is that sensitizing range, a kind of city is striden the shallow buried covered excavation tunnel support structure greatly.
Background technology
At present, the various bored tunnel overwhelming majority all adopt the construction of New Austrian Tunneling Method construction principle.New Austrian Tunneling Method construction principle may be summarized to be following some:
1, New Austrian Tunneling Method is thought, rock mass is the main load bearing unit in the structural system, and essential minimizing as far as possible avoids excessively destroying the intensity of rock mass to the disturbance of rock mass in construction.
2, for giving full play to the supporting capacity of rock mass, should allow and control the distortion of rock mass.
3, in order to improve the stress performance of supporting and protection structure, should be closed as early as possible in the construction and become the tubular construction of sealing.
4, the stage of each in construction, should carry out field measurement and keep watch on, in time provide reliable quantity enough measurement informations.
5, in order to bear anchor pole corrosion, rock property deterioration, rheology and the caused follow-up load that expands, can adopt composite lining.
6, secondary lining is under the basicly stable condition of country rock and preliminary bracing distortion, to build in principle, integral body of country rock and supporting and protection structure formation, thereby improved the degree of safety of support system.
Can find out that from above-mentioned New Austrian Tunneling Method construction principle adopt the tunnel of New Austrian Tunneling Method construction principle to have certain settling amount, this settling amount is generally 3～10cm according to tunnel span, wall rock condition, even greater than 10cm.But stride bored tunnel greatly for the sensitizing range, city, the inner tunnel sedimentation meeting of hole, tunnel causes ground settlement, thereby influences sensitizing range, face of land construction of structures safety and function of use, particularly for high-rise block, historical relic district, microtest field urban compact district etc. in one's power.But along with urban track traffic is built in each city, the whole nation in a large number, because all condition restriction are unavoidably built sensitizing range, above-mentioned similar city and striden bored tunnel greatly.
When unavoidably building sensitizing range, above-mentioned similar city and stride bored tunnel greatly, can cause tunnel surrounding and ground that certain sedimentation is arranged because of adopting conventional New Austrian Tunneling Method construction principle construction, but the sedimentation meeting influence sensitizing range, face of land construction of structures safety and function of use.So striding the conventional New Austrian Tunneling Method construction principle construction of bored tunnel employing greatly in sensitizing range, above-mentioned similar city is inappropriate.Therefore, be necessary to adopt a kind of new technology, solve sensitizing range, above-mentioned similar city and stride bored tunnel greatly and build problem.
Summary of the invention
In order to overcome the problems referred to above, the present invention proposes sensitizing range, a kind of city and stride bored tunnel supporting and protection structure greatly.Adopt this supporting and protection structure only to need conventional New Austrian Tunneling Method construction principle tunnel is increased the prestress anchorage cable of some, can solve the sensitizing range, city and stride bored tunnel greatly and build problem.
Its concrete technical scheme is following:
Patent of the present invention is that sensitizing range, a kind of city is striden bored tunnel supporting and protection structure greatly; Comprise prestress anchorage cable, preliminary bracing shaped steel bow member, anchor mat structure, reservation anchor hole, sprayed mortar, waterproofing course, two lining concrete etc.; It is characterized in that: the shaped steel bow member is arranged in country rock pneumatically placed concrete just; The anchor mat structure is set between the steel bow member; The anchor mat structure is provided with preformed hole, and shaped steel bow member and anchor mat structure adopt and be welded to connect, and anchor cable quantity, length and angle are calculated according to various engineering specifications and excavation step preface and confirmed.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly; It is characterized in that: after the supporting of shaped steel bow member, anchor mat structure and country rock pneumatically placed concrete completion just being installed; Adopt specific drilling equipment; Carry out said prestress anchorage cable boring, carry out concerned process steps such as rope, slip casting, stretch-draw, anchoring, sealing off and covering anchorage under the anchor cable then.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, and it is characterized in that: prestress anchorage cable and tunnel support are angled, can support force upwards and the horizontal force that compresses scar be provided for the shaped steel bow member.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, it is characterized in that: the shaped steel that said anchor mat structure is one group of certain specification connects by certain compound mode, and itself and preliminary bracing shaped steel bow member are welded to connect and just pneumatically placed concrete is closely connected with country rock.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said anchor plate is the shaped steel plate of carving of a definite form, and it is the shaped steel of certain compound mode down, upward is prestressed anchor, and is middle for reserving anchor hole.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, it is characterized in that: the general prestressed anchor of said prestressed anchor for selecting for use according to engineering specifications.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, and it is characterized in that: said sprayed mortar is the same with ordinary crossing.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said waterproofing course is the same with ordinary crossing with two lining concrete.
Sensitizing range, described a kind of city is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said prestress anchorage cable is provided with quantity and angle is set to be confirmed according to various engineering specifications and the preface calculating of excavation step.
This sensitizing range, a kind of city is striden bored tunnel supporting and protection structure greatly, effectively solves above-mentioned tunnel and builds problem.In general, adopt this supporting and protection structure to implement such tunnel than conventional New Austrian Tunneling Method principle and have more exploitativeness, also reduce risk, reduce cost, this technology has less investment and characteristics such as effect is obvious, technology simple and be easy to apply simultaneously.
Description of drawings
Fig. 1 strides bored tunnel supporting and protection structure typical section sketch map greatly for sensitizing range, a kind of city of patent of the present invention.
Fig. 2 strides bored tunnel supporting and protection structure arrangement relation sketch map greatly for sensitizing range, a kind of city of patent of the present invention.
Fig. 3 strides bored tunnel supporting and protection structure anchor mat structure floor map greatly for sensitizing range, a kind of city of patent of the present invention.
Fig. 4 strides bored tunnel supporting and protection structure anchor mat structure I-I drawing greatly for sensitizing range, a kind of city of patent of the present invention.
Among the figure: 1---prestress anchorage cable; 2---the anchor mat structure; 3---the shaped steel bow member; 4---sprayed mortar; 5---waterproofing course; 6---two lining concrete; 7---reserve anchor hole; 8---tunnel surrounding;
31---anchor mat structure i iron; 32---anchor mat structure anchor plate; 33---anchor mat structure ground tackle; L---preliminary bracing shaped steel bow member spacing; B---preliminary bracing shaped steel bow member width; B---the anchor mat structure anchor plate length of side; H---preliminary bracing shaped steel bow member and anchor mat structure i iron height; H1---shaped steel bow member and country rock spacing; H2---anchor mat structure anchor plate thickness; D---reserve the anchor hole diameter.
The specific embodiment
Below in conjunction with accompanying drawing patent of the present invention is specified:
Parameter is confirmed: adopt this Technology Need to combine engineering specifications and excavation step preface, specifically comprise: relevant parameters such as shaped steel bow member parameter, prestress anchorage cable arrangement and parameter.
The practical implementation step:
One, adopts this Technology Need to combine engineering specifications and excavation step preface, carry out relevant design.
Two, by design step preface excavation.
Three, preliminary bracing shaped steel bow member, the anchor mat structure be installed, just sprayed sprayed mortar, common anchor cable is executed and is done and sprayed mortar, this step needs to reserve the prestress anchorage cable position.
Concerned process steps such as three, prestress anchorage cable boring, following rope, slip casting, anchoring, sealing off and covering anchorage.
Four, other operations are with conventional bored tunnel construction technology.
Claims (9)
1. patent of the present invention is that sensitizing range, a kind of city is striden bored tunnel supporting and protection structure greatly; Comprise prestress anchorage cable, preliminary bracing shaped steel bow member, anchor mat structure, reservation anchor hole, sprayed mortar, waterproofing course, two lining concrete etc.; It is characterized in that: the shaped steel bow member is arranged in country rock pneumatically placed concrete just; The anchor mat structure is set between the steel bow member; The anchor mat structure is provided with preformed hole, and shaped steel bow member and anchor mat structure adopt and be welded to connect, and anchor cable quantity, length and angle are calculated according to various engineering specifications and excavation step preface and confirmed.
2. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly; It is characterized in that: after the supporting of shaped steel bow member, anchor mat structure and country rock pneumatically placed concrete completion just being installed; Adopt specific drilling equipment; Carry out said prestress anchorage cable boring, carry out concerned process steps such as rope, slip casting, stretch-draw, anchoring, sealing off and covering anchorage under the anchor cable then.
3. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly, it is characterized in that: prestress anchorage cable and tunnel support are angled, can support force upwards and the horizontal force that compresses scar be provided for the shaped steel skeleton.
4. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly; It is characterized in that: the shaped steel that said anchor mat structure is one group of certain specification connects by certain compound mode, and itself and preliminary bracing shaped steel bow member are welded to connect and just pneumatically placed concrete is closely connected with country rock.
5. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said anchor plate is the shaped steel plate of carving of a definite form, and it is the shaped steel of certain compound mode down, upward is prestressed anchor, and is middle for reserving anchor hole.
6. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly, it is characterized in that: the general prestressed anchor of said prestressed anchor for selecting for use according to engineering specifications.
7. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said sprayed mortar is the same with ordinary crossing.
8. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said waterproofing course is the same with ordinary crossing with two lining concrete.
9. sensitizing range, the described a kind of city of claim 1 is striden bored tunnel supporting and protection structure greatly, it is characterized in that: said prestress anchorage cable is provided with quantity and angle is set to be confirmed according to various engineering specifications and the preface calculating of excavation step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103288430A CN102345463A (en) | 2011-10-19 | 2011-10-19 | Support structure for large-span shallow-buried underground tunnel in urban sensitive area |
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| CN2011103288430A CN102345463A (en) | 2011-10-19 | 2011-10-19 | Support structure for large-span shallow-buried underground tunnel in urban sensitive area |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405403A (en) * | 2014-10-20 | 2015-03-11 | 西南交通大学 | Construction method capable of controlling deformation of surrounding rock of underground excavated large-span subway station |
| CN106014453A (en) * | 2016-07-08 | 2016-10-12 | 山东大学 | Method for automatically constructing support of confined concrete arch center for underground tunnel |
| CN107587878A (en) * | 2015-02-05 | 2018-01-16 | 新汶矿业集团有限责任公司 | Pit shaft and shaft station attachment structure |
| CN108019209A (en) * | 2017-11-17 | 2018-05-11 | 西安理工大学 | The drawing anchor construction method deformed suitable for the overlying solum settlement of shallow tunnel |
| CN110513124A (en) * | 2019-09-16 | 2019-11-29 | 安徽理工大学 | A kind of inserted slip casting pipe network supporting construction of high stress stratiform relief joint rock laneway |
| CN111412002A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Anchor cable counter-pulling type supporting structure system and construction method |
| CN111456757A (en) * | 2020-04-30 | 2020-07-28 | 中铁隧道集团二处有限公司 | Construction method for preventing large-section tunnel lining reinforcing steel bars from collapsing |
| CN113982625A (en) * | 2021-10-12 | 2022-01-28 | 中国化学工程第十六建设有限公司 | Reinforcing device and method for preventing subway tunnel from settling in soft soil |
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| CN2680860Y (en) * | 2004-02-27 | 2005-02-23 | 王连军 | Easily hauled anchor cable rigging |
| CN2839560Y (en) * | 2005-08-03 | 2006-11-22 | 谢文兵 | The coupling integrated device of cable bolting and shed ding support |
| CN101230784A (en) * | 2008-01-31 | 2008-07-30 | 长安大学 | Tunnel steel arch frame lock foot anchoring stock net-spraying composite structure |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405403A (en) * | 2014-10-20 | 2015-03-11 | 西南交通大学 | Construction method capable of controlling deformation of surrounding rock of underground excavated large-span subway station |
| CN104405403B (en) * | 2014-10-20 | 2016-08-24 | 西南交通大学 | A kind of control tunneling greatly across the construction method of subway station surrouding rock deformation |
| CN107587878A (en) * | 2015-02-05 | 2018-01-16 | 新汶矿业集团有限责任公司 | Pit shaft and shaft station attachment structure |
| CN106014453A (en) * | 2016-07-08 | 2016-10-12 | 山东大学 | Method for automatically constructing support of confined concrete arch center for underground tunnel |
| CN106014453B (en) * | 2016-07-08 | 2018-06-22 | 山东大学 | A kind of confined concrete arch supporting automated construction method suitable for subterranean tunnel |
| CN108019209A (en) * | 2017-11-17 | 2018-05-11 | 西安理工大学 | The drawing anchor construction method deformed suitable for the overlying solum settlement of shallow tunnel |
| CN110513124A (en) * | 2019-09-16 | 2019-11-29 | 安徽理工大学 | A kind of inserted slip casting pipe network supporting construction of high stress stratiform relief joint rock laneway |
| CN111412002A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Anchor cable counter-pulling type supporting structure system and construction method |
| CN111456757A (en) * | 2020-04-30 | 2020-07-28 | 中铁隧道集团二处有限公司 | Construction method for preventing large-section tunnel lining reinforcing steel bars from collapsing |
| CN113982625A (en) * | 2021-10-12 | 2022-01-28 | 中国化学工程第十六建设有限公司 | Reinforcing device and method for preventing subway tunnel from settling in soft soil |
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Application publication date: 20120208 |