CN108343456A - Underground excavation subway station internal explosion construction method - Google Patents
Underground excavation subway station internal explosion construction method Download PDFInfo
- Publication number
- CN108343456A CN108343456A CN201810075468.5A CN201810075468A CN108343456A CN 108343456 A CN108343456 A CN 108343456A CN 201810075468 A CN201810075468 A CN 201810075468A CN 108343456 A CN108343456 A CN 108343456A
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- earthwork
- blasting
- earth
- station
- construction
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000004880 explosion Methods 0.000 title claims description 37
- 238000009412 basement excavation Methods 0.000 title abstract description 7
- 238000005422 blasting Methods 0.000 claims abstract description 24
- 238000007796 conventional method Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 230000005641 tunneling Effects 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 4
- 210000002615 epidermis Anatomy 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 26
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002344 surface layer Substances 0.000 abstract description 2
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to an implosion construction method for a subsurface excavated subway station, which comprises the following steps: dividing earthwork in the station into upper earthwork and lower earthwork, and vertically dividing the upper earthwork and the lower earthwork into a plurality of layers; excavating all earthwork layers in the upper earthwork by adopting vertical hole blasting in sequence; after the upper earthwork blasting is finished, constructing a main structure middle plate, and enabling the bottom of the middle plate to be 1.5-2 m higher than the upper surface layer of the earthwork at the lower part of the middle plate; and blasting the uppermost earthwork layer in the lower earthwork by adopting a horizontal hole, and excavating other earthwork layers by adopting vertical hole blasting in sequence, and finishing the subsequent construction operation in the station according to a conventional method after blasting. The invention integrates the open and underground excavation blasting construction technology, carries out layered and segmented blasting on earthwork in the station, adopts the adaptive blasting mode aiming at different positions, ensures the construction safety, saves time and labor, greatly improves the construction efficiency and effectively controls the influence of blasting construction on the finished product structure. The invention is suitable for excavation construction of foundation pits with rocky stratums, station structure reverse construction and short construction period.
Description
Technical field
The present invention relates to blasting construction methods in underground engineering technical field more particularly to a kind of tunneling subway station station.
Background technology
After founding of New, with the recovery of economic construction of China, blasting technique is developed rapidly, especially
Since 1978, China's economy enters the rapid development stage, and the construction of various infrastructure has driven the fast development of blasting technique.
The Excavation Blasting of subway field rock stratum is generally used for open cut of subway station, running tunnel, tunneling subway
It stands due to by inner ring border is arrived at a station and space is restricted, not having to blast working substantially.And rock stratum is applied in traditional Station station
Work method has the defects of taking time and effort, waste of resource.Therefore, there is an urgent need in a kind of efficient and safe tunneling subway station station
Blasting construction method.
Invention content
Technical problem to be solved by the invention is to provide explosions in a kind of efficient and safe tunneling subway station station
Construction method.
To solve the above problems, blasting construction method in a kind of tunneling subway station station of the present invention, including：
The earthwork in station is divided into top cubic metre of earth and lower part cubic metre of earth, and if the two is vertically divided into dried layer respectively；
Each earthwork layer in the top cubic metre of earth is excavated using vertical eye explosion successively；
On the top cubic metre of earth after the completion of explosion, applies plate in agent structure and make its board bottom higher than middle plate lower part cubic metre of earth upper epidermis
1.5m~2m；
Vertical eye explosion is used successively using horizontal eye explosion, other cubic metres of earth of layers to uppermost earthwork layer in the lower part cubic metre of earth
It is excavated, completes constructing operation in follow-up station after explosion according to a conventional method.
Preferably, use the earthwork layer thickness of vertical eye explosion for 2 ~ 2.2m.
Preferably, the top cubic metre of earth is divided into three layers, the lower part cubic metre of earth is divided into two layers.
Preferably, after the completion of plate applies in the agent structure, when its concrete structural strength reaches design strength
Carry out the explosion of the lower part cubic metre of earth.
Compared with the prior art, the present invention has the following advantages：
The present invention combines the technology of bright tunneling blast working, is with vertical layered to earthwork progress in the station of tunneling subway station
Main, layer and section explosion and for different location using adaptable blasting method（I.e. vertical eye blasting method and horizontal eye
Blasting method）, not only ensure that working security but it is time saving and energy saving, substantially increase construction efficiency, effectively control blast working
Influence to finished product structure.The present invention is suitable for the inverse work of rocky stratum, station structure, the excavation of foundation pit of construction period anxiety is applied
Work.
Description of the drawings
Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is top provided in an embodiment of the present invention cubic metre of earth layering explosion situation schematic diagram.
Fig. 2 is lower part provided in an embodiment of the present invention cubic metre of earth layering explosion situation schematic diagram.
In figure：Plate in A-agent structure.
Specific implementation mode
With reference to figure 1 and Fig. 2, an embodiment of the present invention provides blasting construction method in a kind of station of tunneling subway station, tools
Body includes the following steps：
（1）The earthwork in station is divided into top cubic metre of earth and lower part cubic metre of earth, and if the two is vertically divided into dried layer respectively.
In specific implementation process, controlled in 2 ~ 2.2m, because drilling rod generally selects using the earthwork layer thickness of vertical eye explosion
It is conveniently operated the most with 2m, and a people facilitates hand steered, construction efficiency height.Also, it in top cubic metre of earth delaminating process, to protect
It demonstrate,proves its bottom one layer thickness and guarantees to reach 1.5 ~ 2m below its board bottom after the completion of middle plate A is applied, and its maximum is thick
Degree should not exceed 2.2m, if exceeding, need top cubic metre of earth being layered again.
In addition, making each layer in top cubic metre of earth as far as possible（The earthwork layer of vertical eye explosion is used in top cubic metre of earth）Thickness
It is equal or of substantially equal, in lower part cubic metre of earth in addition to the top each layer（The earthwork of vertical eye explosion is used in lower part cubic metre of earth
Layer）Thickness is equal or of substantially equal, in this case facilitates layering while construction efficiency is high and save working sources.
In addition, for quantities, the layer divided is more, and amount is bigger, so as possible in the feelings for meeting above-mentioned condition when layering
It is layered less under condition.
Based on above-mentioned layering principle, for example top cubic metre of earth can be divided into tri- layers of S1, S2, S3 from top to bottom, S1 ~ S3 is equal
For 2m；Lower part cubic metre of earth is divided into S4, S5 two layers from top to bottom（Structure in figure at S5 is built up after excavating）, S4 4m,
S5 is 2m.
（2）Each earthwork layer in top cubic metre of earth is excavated using vertical eye explosion successively.
During vertical eye Blasting Excavation, blasting in once-through bout length in 15 ~ 20m, generally by detonator section how much
Control；The blast working of multiple paragraphs can be organized daily, and is not interfered between each other.As it can be seen that the more horizontal eye of vertical eye explosion is quick-fried
It is broken efficient, therefore vertical eye explosion is selected to the explosion on top cubic metre of earth.
（3）On top cubic metre of earth after the completion of explosion, applies plate A in agent structure and make its board bottom higher than on middle plate lower part cubic metre of earth
Surface layer 1.5m ~ 2m.
Middle harden structure construction before, for ensure the underground space stablize, foundation pit be not easy to excavate it is too deep, need to be by top earth excavation
To about 1.5 ~ 2m below middle plate A board bottoms, one can be that lower part full framing set up and remove that there are the properly amount of setting up and operations
Space, two can protect in plate A do not influenced by lower layer's explosion, play the role of vibration isolation.Wherein, plate A exists in agent structure
Support and balanced action are played in standing.
After the completion of plate applies in agent structure, when concrete structural strength reaches design strength, lower part can be carried out
The explosion of the earthwork, effectively to avoid middle plate A from being damaged in blasting process.
（4）Vertical eye is used successively using horizontal eye explosion, other cubic metres of earth of layers to uppermost earthwork layer in lower part cubic metre of earth
Explosion is excavated, and completes constructing operation in follow-up station after explosion according to a conventional method.
Specifically, the explosion of lower part cubic metre of earth is divided into two separate explosions, and first time S4 uses horizontal eye explosion, second of S5 to use
Vertical eye explosion.The reason is that：Middle plate A underlying spaces are smaller, do not have vertical eye operating space, and horizontal eye explosion coverage
Small, plate A is segmented and pours in can coordinating, and after reaching design strength paragraph by paragraph, carrying out lower part paragraph by paragraph expires the dismounting of hall frame and blast working, compared with
Conducive to the protection of centering plate；Second fast using vertical eye detonation velocity, efficient.
In addition, it is necessary to plate A Explosive Vibrating Velocity monitorings in strictly being carried out during blast working.
Technical solution provided by the present invention is described in detail above.Specific case used herein is to this hair
Bright principle and embodiment is expounded, the explanation of above example is only intended to help understand the present invention method and its
Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection of the claims in the present invention
In range.
Claims (4)
1. blasting construction method in a kind of station of tunneling subway station, which is characterized in that including：
The earthwork in station is divided into top cubic metre of earth and lower part cubic metre of earth, and if the two is vertically divided into dried layer respectively；
Each earthwork layer in the top cubic metre of earth is excavated using vertical eye explosion successively；
On the top cubic metre of earth after the completion of explosion, applies plate in agent structure and make its board bottom higher than middle plate lower part cubic metre of earth upper epidermis
1.5m~2m；
Vertical eye explosion is used successively using horizontal eye explosion, other cubic metres of earth of layers to uppermost earthwork layer in the lower part cubic metre of earth
It is excavated, completes constructing operation in follow-up station after explosion according to a conventional method.
2. the method as described in claim 1, which is characterized in that use the earthwork layer thickness of vertical eye explosion for 2 ~ 2.2m.
3. the method as described in claim 1, which is characterized in that the top cubic metre of earth is divided into three layers, by the lower part cubic metre of earth
It is divided into two layers.
4. the method as described in claim 1, which is characterized in that after the completion of plate applies in the agent structure, wait for its coagulation
Soil structure intensity carries out the explosion of the lower part cubic metre of earth when reaching design strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810075468.5A CN108343456A (en) | 2018-01-26 | 2018-01-26 | Underground excavation subway station internal explosion construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810075468.5A CN108343456A (en) | 2018-01-26 | 2018-01-26 | Underground excavation subway station internal explosion construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108343456A true CN108343456A (en) | 2018-07-31 |
Family
ID=62961607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810075468.5A Pending CN108343456A (en) | 2018-01-26 | 2018-01-26 | Underground excavation subway station internal explosion construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108343456A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967367A (en) * | 2024-01-17 | 2024-05-03 | 中铁五局集团华南工程有限责任公司 | Underground excavation station access passage structure and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562076A (en) * | 2011-12-23 | 2012-07-11 | 中铁十九局集团第五工程有限公司 | Underground excavation construction technology for large cross-section subway station under geological condition of soft upper layer and hard lower layer |
| CN102758632A (en) * | 2012-07-19 | 2012-10-31 | 中铁隧道集团有限公司 | Rock stratum double initial support layering method for establishing large-scale underground structure |
| CN202707075U (en) * | 2012-07-23 | 2013-01-30 | 中铁一局集团有限公司 | Long-span subway station main structure constructed based on column and arch method |
| CN104180733A (en) * | 2014-08-22 | 2014-12-03 | 中铁四局集团有限公司 | Comprehensive shock absorption method for hard rock tunnel mixed blasting close to existing underground structure |
-
2018
- 2018-01-26 CN CN201810075468.5A patent/CN108343456A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562076A (en) * | 2011-12-23 | 2012-07-11 | 中铁十九局集团第五工程有限公司 | Underground excavation construction technology for large cross-section subway station under geological condition of soft upper layer and hard lower layer |
| CN102758632A (en) * | 2012-07-19 | 2012-10-31 | 中铁隧道集团有限公司 | Rock stratum double initial support layering method for establishing large-scale underground structure |
| CN202707075U (en) * | 2012-07-23 | 2013-01-30 | 中铁一局集团有限公司 | Long-span subway station main structure constructed based on column and arch method |
| CN104180733A (en) * | 2014-08-22 | 2014-12-03 | 中铁四局集团有限公司 | Comprehensive shock absorption method for hard rock tunnel mixed blasting close to existing underground structure |
Non-Patent Citations (2)
| Title |
|---|
| 洪开荣等: "大型地下水封洞库修建技术", <中国铁道出版社> * |
| 陈文尹: "分区组合***在硬岩暗挖地铁车站中的应用", 《工程***》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967367A (en) * | 2024-01-17 | 2024-05-03 | 中铁五局集团华南工程有限责任公司 | Underground excavation station access passage structure and construction method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180731 |
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| RJ01 | Rejection of invention patent application after publication |