CN203499692U - Special-shaped shaft adopted for subway construction under pipeline conditions - Google Patents
Special-shaped shaft adopted for subway construction under pipeline conditions Download PDFInfo
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- CN203499692U CN203499692U CN201320747517.8U CN201320747517U CN203499692U CN 203499692 U CN203499692 U CN 203499692U CN 201320747517 U CN201320747517 U CN 201320747517U CN 203499692 U CN203499692 U CN 203499692U
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Abstract
The utility model discloses a special-shaped shaft adopted for subway construction under pipeline conditions and belongs to the field of subway construction. The special-shaped shaft is characterized in that the shaft is divided into three sections from top to bottom to be excavated so that changing of an earlier-stage pipeline can be prevented from affecting the construction period, and the safety measures that temporary I-shaped steel supports and large pipe sheds are adopted for advanced reinforcement in the shaft are adopted in order to guarantee safety of the shaft and the pipeline. By adopting the special-shaped shaft adopted for subway construction under pipeline conditions, the construction period is shortened by 30% and construction cost is saved by 5% on the whole on the premise that construction safety is guaranteed.
Description
Technical field
The utility model relates to subway work and under particular tube lines part, how to adopt special-shaped vertical shaft to avoid pipeline impact to inquire into and describe in detail the construction method of special-shaped vertical shaft.
Background technology
Subway construction speed in recent years accelerates, build and put more effort, fully under way along with subway construction, and each subway bid section ubiquity moves the phenomenon that affects construction progress because pipeline changes.In tunneling construction, especially in tunneling To Construction of Silo process, as run into pipeline, have influence on Shaft Location, generally can select to avoid pipeline construction by change Shaft Location, once the on-the-spot condition that does not possess Shaft Location adjustment, need wait pipeline to change and move rear construction.So just cause the problems such as wait is in earlier stage marched into the arena, and duration in later stage pressure is excessive, thereby directly had influence on site operation safe mass.
Adopt special-shaped vertical shaft by the gradual change of shaft section area, both met shaft excavation requirement and can avoid pipeline impact simultaneously and construct, simultaneously maximum assurance pipeline safety.
Summary of the invention
Make full use of on the basis of standard To Construction of Silo technique, under the premise that security is guaranteed support pattern is improved, thereby avoid the restriction of pipeline condition.Formed existing special-shaped To Construction of Silo technique.The method of reinforcing with borehole wall gut line of setting up by gradual change section grid has shifted to an earlier date the duration on the basis of existing execution conditions, has avoided pipeline impact effectively to guarantee pipeline safety simultaneously.In construction, monitoring measurement indices all meets the requirements.
Its technology contents is as follows:
The utility model is the construction technology of special-shaped vertical shaft, it is characterized in that: the first half is dwindled pit mouth excavated section, and middle part adopts gradual manner to transit to standard section excavation, and performs the inside and outside safety precautions of well, the construction technology of bottom standard section excavation.
Described three kinds of excavated sections are respectively:
First half shrink sector: section width is 8.9m, the degree of depth, to pipeline bottom 0.5～1m, is total to 2.6m, and main purpose is to avoid pipeline;
Middle part gradual change section: section width is 8.6～10.6m, dark 3.0m, main purpose is to standard section by light section gradual change;
Standard section: section width is 10.6m, dark 10.27m, this section is the required minimum cross section of tunnel excavation.According to claim, revise
In described well, adopt the safety measure of i iron and advanced tubule grouting and reinforcing, it is characterized in that: in shaft excavation process, set up interim i iron and support, vertical shaft is divided into two parts, and at gradual change section, pipeline bottom is set to bassoon canopy and reinforce, guarantee pipeline safety.
The interim i iron of described special-shaped vertical shaft supports and adopts I22a shaped steel, and spacing is 0.5m.
The transition section of described special-shaped vertical shaft adopts Φ 108@300mm to pipeline bottom, and the bassoon canopy of long 4.17m is reinforced, bassoon canopy grout injection.
The construction technology of described special-shaped vertical shaft, is characterized in that: adopt special-shaped To Construction of Silo technique, under the premise that security is guaranteed, avoided pipeline to change moving affecting the duration, accelerated construction speed, saved cost, guaranteed construction quality.
Utility model, tool has the following advantages:
One, effectively reduce the impact of shaft excavation on pipeline safety.
Two, the construction of can marching into the arena in advance, avoids pipeline to change moving affecting the construction period.
Three, retained most of standard section, structural change has been dropped to minimum on the impact of To Construction of Silo.
Four, integral body has shifted to an earlier date for 30% construction period.
Five, reduced approximately 5% construction cost.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, illustrate:
As shown in Figure 1, the construction technology of the utility model abnormity vertical shaft, the first half is dwindled pit mouth excavated section, and middle part adopts gradual manner to transit to standard section excavation, and performs the inside and outside safety precautions of well, the construction technology of bottom standard section excavation.
Described three kinds of excavated sections are respectively:
First half shrink sector: section width is 8.9m, the degree of depth, to pipeline bottom, is total to 2.6m, and main purpose is to avoid pipeline;
Middle part gradual change section: section width is 8.6～10.6m, dark 3.0m, main purpose is to standard section by light section gradual change;
Standard section: section width is 10.6m, dark 10.27m, this section is the required minimum cross section of tunnel excavation.
Specific construction flow process step order is:
The first step: shrink sector excavation
Through site inspection, within the scope of shaft excavation, there are φ 600 upper hoses, the relation of vertical shaft and pipeline is as shown in drawings.By dwindling top section excavation size, avoided the impact of pipeline, and set up setting up of i iron temporary supporting and strengthen section supporting and protection structure.
Second step: gradual change section
Pipeline is walked around in gradual change by 6 Pin grids (being deeply total to 3m, Grill space 0.5m), and vertical shaft becomes section to standard paragraphs, has guaranteed the normal unearthed working space of vertical shaft.
The 3rd step: borehole wall pipeline reinforcement measure
Because pipe subsoil body is room dregs, at the bottom of avoiding pipe settlement and preventing upper hose pipe because of the long-term moist water pocket that forms, therefore to managing the end, set bassoon canopy and reinforce being excavated under pipe after square 500mm again.
Concrete measure is: after being excavated to the beneath square 500mm of pipe, in the beneath side of pipe, set row Φ 108@30mm, long 4.17m bassoon canopy, the slip casting of pipe canopy employing 1:1 cement paste, grouting pressure 0.2～0.5MPa.For the bassoon canopy that prevents from setting destroys pipeline, before construction, at the bottom of reply pipeline, absolute altitude is surveyed, and to pipe end elevation, carries out field labeled at the borehole wall.
The 4th step: the pipe settlement monitoring in work progress
Before To Construction of Silo, should arrange in advance pipeline settlement observation point, and record the original settling data of pipeline.In vertical shaft and follow-up tunneling work progress, should regularly to pipe settlement, monitor authenticity and the promptness that guarantees pipe settlement data, and in conjunction with settlement monitoring data reasonable arrangement site operation progress, will drop to minimum on the impact of pipeline.
The 5th step: To Construction of Silo safety measure
Because shaft structure changes, cause force structure to change, in vertical shaft, add work 22a i iron temporary supporting, strengthen shaft support intensity, guarantee To Construction of Silo safety.
In shaft wall, especially within the scope of pipeline, arrange convergence monitoring point simultaneously, periodic monitoring, forms monitor database, verifies the safety of shaft structure in conjunction with the convergence monitoring of vertical shaft, so that timely specified structure strengthening measure, guarantees construction safety in the situation that monitored data is abnormal.
The 6th step: arm's length standard section is constructed to shaft bottom back cover
The dark 10.27m of standard section, Grill space 0.5m, sets up grid and i iron support with excavation, and silo bottom adopts the sealing of I22a i iron.
The construction technology of above the utility model abnormity vertical shaft, is the typical case study on implementation of access, two subway stations construction, and enforcement of the present utility model is not limited to this.The use of abnormity vertical shaft can effectively be saved the engineering time, and its construction risk rate is relatively little simultaneously, has reduced the requirement of tunneling To Construction of Silo to place.Therefore, the construction method of special-shaped vertical shaft has special meaning to following hidden digging structure construction.
Claims (1)
1. the special-shaped vertical shaft of subway work under pipeline condition, is characterized in that: vertical shaft is by upper from lower minute three kinds of excavated sections, and described three kinds of excavated sections are respectively:
First half shrink sector: section width is 8～9m, the degree of depth is to 0.5～1m below pipeline bottom;
Middle part gradual change section: section width, for equaling first half shrink sector above, equals standard section below, and be by the gradual change of first half shrink sector to standard section, the degree of depth is 2～3m;
Standard section: section width is 10.6～12.1m, dark 7.5～11.6m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320747517.8U CN203499692U (en) | 2013-11-25 | 2013-11-25 | Special-shaped shaft adopted for subway construction under pipeline conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320747517.8U CN203499692U (en) | 2013-11-25 | 2013-11-25 | Special-shaped shaft adopted for subway construction under pipeline conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203499692U true CN203499692U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320747517.8U Expired - Fee Related CN203499692U (en) | 2013-11-25 | 2013-11-25 | Special-shaped shaft adopted for subway construction under pipeline conditions |
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| CN (1) | CN203499692U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587320A (en) * | 2016-01-29 | 2016-05-18 | 中铁第一勘察设计院集团有限公司 | Water-rich sandy cobble ground heteromorphosis deep shaft structural system and construction method thereof |
| CN107893659A (en) * | 2017-10-18 | 2018-04-10 | 中铁十六局集团地铁工程有限公司 | A kind of shaft excavation construction method for charging of being unearthed by underground |
-
2013
- 2013-11-25 CN CN201320747517.8U patent/CN203499692U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587320A (en) * | 2016-01-29 | 2016-05-18 | 中铁第一勘察设计院集团有限公司 | Water-rich sandy cobble ground heteromorphosis deep shaft structural system and construction method thereof |
| CN105587320B (en) * | 2016-01-29 | 2018-07-17 | 中铁第一勘察设计院集团有限公司 | Rich water sand-pebble layer abnormal shape deep shaft structural system and its construction method |
| CN107893659A (en) * | 2017-10-18 | 2018-04-10 | 中铁十六局集团地铁工程有限公司 | A kind of shaft excavation construction method for charging of being unearthed by underground |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141125 |
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| EXPY | Termination of patent right or utility model |