CN107461201A - The damping protection system and its construction method of hard rock subway station in a kind of middle hole method Blasting Excavation - Google Patents
The damping protection system and its construction method of hard rock subway station in a kind of middle hole method Blasting Excavation Download PDFInfo
- Publication number
- CN107461201A CN107461201A CN201710932535.6A CN201710932535A CN107461201A CN 107461201 A CN107461201 A CN 107461201A CN 201710932535 A CN201710932535 A CN 201710932535A CN 107461201 A CN107461201 A CN 107461201A
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- China
- Prior art keywords
- inverted arch
- benzene plate
- protection system
- subway station
- excavation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
Abstract
The invention discloses a kind of damping protection system of hard rock subway station in middle hole method Blasting Excavation, it is included in the benzene plate laid respectively on side wall and inverted arch, concrete layer is provided with the benzene plate, dike is buffered in the thick explosions of the reserved 0.8m 1m of side wall and inverted arch respectively in adjacent cavern excavation；The invention also discloses hole in its construction method, including excavation, Zhong Dong two sides are backbreak 10cm 15cm depth during excavation, and inverted arch is backbreak 15cm 20cm depth；Benzene plate is laid respectively in the rock stratum face of side wall and inverted arch and concrete layer filling-in is set, the isolation buffer structure as gib；Gib is installed；After the safe step pitch of first layer reaches requirement, explosion is carried out again after the thick dikes of 0.8m 1.0m are reserved at the top of the second layer；During the wide open digging in side, explosion is carried out again after median septum reserves the thick dikes of 0.8m 1.0m.Benzene plate and concrete layer are set on side wall and inverted arch, and explosion buffering dike is reserved in adjacent cavern excavation, destruction of the vibrations to gib can be reduced to greatest extent, ensure construction safety.
Description
Technical field
The present invention relates to underground engineering construction field, hard rock subway station in more particularly to a kind of middle hole method Blasting Excavation
Damping protection system and its construction method.
Background technology
In metro station construction, when formation condition is poor, section is especially big, be generally configured to multispan structure, across with across it
Between have beam, a post connection, it is general use in construction, its core concept such as hole method, side hole method, post hole method and cavern-pile method be to become big cross section
For middle light section, construction safety degree is improved.
Construction with middle tunnel method is exactly first to excavate center section (middle hole), and beam, rod structure are applied in middle hole, then excavates two again
Side part (side hole), and load at the top of the hole of side is gradually transferred to beam, on rod structure by middle hole gib.Construction with middle tunnel method
Process is more complicated, but both sides hole symmetrical construction, and being easier solution lateral pressure, therefrom hole gib is transferred to when on beam column
Uneven lateral pressure problem, surface subsidence caused by construction are relatively easy to control.The characteristics of engineering method be gib from top to bottom, often
One step closing cyclization, all linked with one another, secondary lining is constructed from bottom to top, and construction quality is readily obtained guarantee.Hole method is quick-fried in
Break digging in hard rock subway station, have it is safe, flexibility is good, workable, mechanization degree is low, be unearthed efficiency
High, inter process disturbs the advantages that less.
Generally in construction with middle tunnel method means of defence, it all will not excavate rock stratum and gib is separated, and cause explosion
The destruction shaken to gib is more serious, and on the other hand, due to not laying benzene plate at rock stratum, gunite concrete is straight with rock stratum
Contact, thus it is poor, it is necessary to the concrete that fills spray be carried out, to a certain degree in the Surface Quality of Concrete of the wide open digging rear wall in side
On add project cost.
The content of the invention
It is an object of the invention to overcome in the existing construction with middle tunnel method in the presence of prior art to break gib
It is bad more serious, and the deficiency that Surface Quality of Concrete is poor, there is provided hard rock subway station in a kind of middle hole method Blasting Excavation
Damping protection system and its construction method.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
The damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation, it is included on side wall and inverted arch respectively
The benzene plate of laying, concrete layer is provided with the benzene plate, is reserved respectively in side wall and inverted arch in adjacent cavern excavation
Explosion buffering dike thick 0.8m-1m.
Benzene plate and concrete layer are set on side wall and inverted arch, and the thick explosions of 0.8m-1m are reserved respectively in adjacent cavern
Dike is buffered, vibrations can be reduced to greatest extent so as to form isolation buffer structure and explosion energy-absorbing protection structure, during Blasting Excavation
Destruction to gib, ensure construction safety；And benzene plate is set between the dike and concrete layer, it is ensured that excavate
The Surface Quality of Concrete of rear wall and inverted arch, the concrete that fills spray is avoided, has saved cost to a certain extent.
Preferably, it is laid between the concrete layer on inverted arch and the benzene plate and is additionally provided with rubble separation layer, it is described
Rubble separation layer is by rubble and the molecular loose structure of sand, there is good energy-absorbing buffering to act on, so as to reduce explosion
Shake the influence to inverted arch gib.
Preferably, the thickness of the benzene plate is 3cm-8cm.
Preferably, the thickness of the concrete layer is 10cm-15cm.
Preferably, the benzene plate is fixed on the dike by nailing gun, benzene plate subsection setup, and is covered completely as far as possible
Build the dike.
The invention also discloses a kind of construction party of the damping protection system of hard rock subway station in middle hole method Blasting Excavation
The damping protection system of hard rock subway station, its construction method are in method, including a kind of any above-mentioned middle hole method Blasting Excavation：
Step 1：Hole in excavation, Zhong Dong two sides are backbreak 10cm-15cm depth during excavation, and inverted arch is backbreak 15cm-20cm depths
Degree；
Step 2：Benzene plate is laid respectively in the rock stratum face of side wall and inverted arch and concrete layer filling-in is set, as interim branch
The isolation buffer structure of shield；
Step 3：The shaped steel of gib is installed, and shotcrete with steel bar nets is to design thickness；
Step 4：After the safe step pitch of first layer reaches requirement, after the thick dikes of 0.8m-1.0m are reserved at the top of the second layer
Explosion is carried out again；
Step 5：During the wide open digging in side, explosion is carried out again after median septum reserves the thick dikes of 0.8m-1.0m.
Side wall and inverted arch are backbreak during hole in excavation, forming explosion energy-absorbing using benzene plate and concrete layer after backbreaking protects
Protection structure, and 0.8-1.0m explosion protection dike is left when adjacent chamber blasting is excavated, explosion can be reduced to greatest extent
The destruction to gib is shaken, ensures construction safety；Benzene plate is first laid in rock stratum face, and concrete layer filling-in, Ke Yibao are set again
Card excavates the Surface Quality of Concrete of rear wall and inverted arch, avoids the concrete that fills spray, has saved cost to a certain extent.
Preferably, in the step 2, rubble separation layer is first laid in the benzene plate when inverted arch is constructed, then described
Concrete layer is laid on rubble separation layer, the rubble separation layer is by rubble and the molecular loose structure of sand, is had good
Energy-absorbing buffering effect, so as to reduce influence of the concussion of blasting to inverted arch gib.
Preferably, in the step 4 and step 5 reserve dike using digging machine excavate, and to interim inverted arch bottom with
Interim median septum fills spray concrete, by the way of mechanical equivalent of light excavation, can reduce concussion of blasting to greatest extent to gib
Destroy, ensure construction safety.
Preferably, benzene plate is fixed on the dike by nailing gun described in the step 2, then in the benzene plate
Shotcrete layer.
Compared with prior art, beneficial effects of the present invention：
(1) benzene plate and concrete layer are set on side wall and inverted arch, and reserved respectively when adjacent chamber blasting is excavated
Explosion buffering dike thick 0.8m-1m, so as to form isolation buffer structure and explosion energy-absorbing protection structure, can be reduced to greatest extent
The destruction to gib is shaken, ensures construction safety；And benzene plate is set between the dike and concrete layer, it is ensured that
The Surface Quality of Concrete of rear wall and inverted arch is excavated, the concrete that fills spray is avoided, has saved cost to a certain extent；It is laid on
Rubble separation layer is additionally provided between the concrete layer and the benzene plate on inverted arch, the rubble separation layer is by rubble and sand
Molecular loose structure, there is good energy-absorbing buffering to act on, so as to reduce shadow of the concussion of blasting to inverted arch gib
Ring.
(2) side wall and inverted arch are backbreak during hole in excavating, forming explosion using benzene plate and concrete layer after backbreaking inhales
Can protection structure, and dike is protected in the explosion for leaving when adjacent chamber blasting is excavated 0.8-1.0m, can be reduced to greatest extent
Destruction of the concussion of blasting to gib, ensure construction safety；Benzene plate is first laid in rock stratum face, and concrete layer filling-in is set again, can
To ensure to excavate the Surface Quality of Concrete of rear wall and inverted arch, the concrete that fills spray is avoided；Reserved dike is excavated using digging machine,
And the concrete that filled spray to interim inverted arch bottom and interim median septum, by the way of mechanical equivalent of light excavation, it can reduce to greatest extent quick-fried
Destruction of the broken vibrations to gib, ensures construction safety.
Brief description of the drawings：
Fig. 1 is the structure of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation of the present invention
Schematic diagram.
Fig. 2 is the structural representation of the damping protection system set in Fig. 1 in top layer in the structure of hole.
Fig. 3 is the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation of the present invention
The flow chart of method.
Marked in figure：1- gibs, 2- concrete layers, 3- benzene plates, 4- dikes, 5- rubble separation layers, 6- center pillars.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
Embodiment 1
As shown in Figure 1-2, center pillar 6 is the component for mainly undertaking upper load in construction with middle tunnel method, and upper load is in
Load is passed to center pillar 6 by the both sides arch of post 6 and top beam, and power is passed to ground by last center pillar 6.Construction with middle tunnel method due to pilot tunnel compared with
It is more, it is therefore desirable to set more gib 1 to control Rock And Soil to deform.
In order to reduce destruction of the explosion to gib 1 as far as possible, the invention provides in a kind of middle hole method Blasting Excavation
The damping protection system of hard rock subway station, it is included in the benzene plate 3 laid respectively on side wall and inverted arch, is set in the benzene plate 3
Concrete layer 2 is equipped with, dike 4 is buffered in the thick explosions of the reserved 0.8m-1m of side wall and inverted arch respectively in adjacent cavern excavation.
It is laid between the concrete layer 2 on inverted arch and the benzene plate 3 and is additionally provided with rubble separation layer 5, the thickness of the benzene plate 3 is
3cm-8cm, the benzene plate 3 are fixed on the dike 4 by nailing gun, and the thickness of the concrete layer 2 is 10cm-15cm.
Benzene plate 3 and concrete layer 2 are set respectively on side wall and inverted arch, and 0.8m-1m is reserved in adjacent cavern excavation
Thick explosion buffering dike 4, can maximum limit in Blasting Excavation so as to form isolation buffer structure and explosion energy-absorbing protection structure
Degree reduces destruction of the vibrations to gib 1, ensures construction safety；And benzene plate is set between the dike 4 and concrete layer 2
3, it is ensured that excavate the Surface Quality of Concrete of rear wall and inverted arch, avoid the concrete that fills spray, save to a certain extent
Cost；It is laid between the concrete layer 2 on inverted arch and the benzene plate 3 and is additionally provided with rubble separation layer 5, the rubble isolation
Layer is by rubble and the molecular loose structure of sand, there is good energy-absorbing buffering to act on, so as to reduce concussion of blasting to facing upward
Encircle the influence of gib.
Embodiment 2
As shown in figure 3, the present invention also provides a kind of damping protection system of hard rock subway station in middle hole method Blasting Excavation
Construction method, including in a kind of above-mentioned middle hole method Blasting Excavation hard rock subway station damping protection system, its construction party
Method is：
Step 1：Hole in excavation, Zhong Dong two sides are backbreak 10cm-15cm depth during excavation, and inverted arch is backbreak 15cm-20cm depths
Degree；
Step 2：Laying benzene plate 3 and the filling-in of shotcrete layer 2 in the rock stratum face of side wall, in the rock stratum face Xian Pu of inverted arch
If rubble separation layer 5, then the filling-in of shotcrete layer 2 on the rubble separation layer 5, the isolation buffer as gib 1
Structure；
Step 3：The shaped steel of gib 1 is installed, and shotcrete with steel bar nets is to design thickness；
Step 4：After the safe step pitch of first layer reaches requirement, after reserved 0.8m-1.0m dikes 4 at the top of the second layer again
Explosion is carried out, reserved dike 4 is excavated using digging machine, and the concrete that filled spray to interim inverted arch bottom；
Step 5：During the wide open digging in side, explosion, reserved rock are carried out again after median septum reserves the thick dikes 4 of 0.8m-1.0m
Wall 4 is excavated using digging machine, and the concrete that filled spray to interim median septum.
Explosion energy-absorbing protection structure is formed using benzene plate 3 and concrete layer 2 after backbreaking, and when adjacent chamber blasting is excavated
The thick explosion protection dikes 4 of 0.8-1.0m are left, destruction of the concussion of blasting to gib 1 can be reduced to greatest extent, ensured
Construction safety；The filling-in of 3 fill-before-fire concrete layer of benzene plate 2 is first laid in rock stratum face, it is ensured that excavate the mixed of rear wall and inverted arch
Native presentation quality is coagulated, the concrete that fills spray is avoided, has saved cost to a certain extent；Reserved dike 4 is using mechanical equivalent of light excavation
Mode, destruction of the concussion of blasting to gib 1 can be reduced to greatest extent, ensure construction safety.
Preferably, benzene plate 3 described in the step 2 is fixed on the dike 4 by nailing gun, then in the benzene plate 3
Upper shotcrete layer 2.
Above example only not limits technical scheme described in the invention to illustrate the present invention, although this explanation
Book is with reference to above-mentioned each embodiment to present invention has been detailed description, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any the present invention is modified or equivalent substitution；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, it all should cover among scope of the presently claimed invention.
Claims (9)
- A kind of 1. damping protection system of hard rock subway station in middle hole method Blasting Excavation, it is characterised in that be included in side wall and The benzene plate (3) laid respectively on inverted arch, concrete layer (2) is provided with the benzene plate (3), is distinguished in adjacent cavern excavation In the thick explosion buffering dikes (4) of the reserved 0.8m-1m of side wall and inverted arch.
- 2. the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1, it is special Sign is, rubble separation layer (5) is additionally provided between the concrete layer (2) and the benzene plate (3) that are laid on inverted arch.
- 3. the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1, it is special Sign is that the thickness of the benzene plate (3) is 3cm-8cm.
- 4. the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1, it is special Sign is that the thickness of the concrete layer (2) is 10cm-15cm.
- 5. according to the damping protection system of hard rock subway station in a kind of any described middle hole method Blasting Excavations of claim 1-4 System, it is characterised in that the benzene plate (3) is fixed on the dike (4) by nailing gun.
- A kind of 6. construction method of the damping protection system of hard rock subway station in middle hole method Blasting Excavation, it is characterised in that bag The damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation as described in claim 1-5 is any is included, it is applied Work method is：Step 1：Hole in excavation, Zhong Dong two sides are backbreak 10cm-15cm depth during excavation, and inverted arch is backbreak 15cm-20cm depth；Step 2：Benzene plate (3) is laid respectively in the rock stratum face of side wall and inverted arch and concrete layer (2) filling-in is set, as interim The isolation buffer structure of supporting (1)；Step 3：The shaped steel of gib (1) is installed, and shotcrete with steel bar nets is to design thickness；Step 4：After the safe step pitch of first layer reaches requirement, after the thick dikes (4) of 0.8m-1.0m are reserved at the top of the second layer Explosion is carried out again；Step 5：During the wide open digging in side, explosion is carried out again after median septum reserves the thick dikes (4) of 0.8m-1.0m.
- 7. the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 6 Method, it is characterised in that in the step 2, rubble separation layer (5) is first laid in the benzene plate (3) when inverted arch is constructed, Concrete layer (2) is laid on the rubble separation layer (5) again.
- 8. the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 6 Method, it is characterised in that the dike (4) reserved in the step 4 and step 5 is excavated using digging machine, and to interim inverted arch bottom Portion and interim median septum fill spray concrete.
- 9. according to the damping protection system of hard rock subway station in a kind of any described middle hole method Blasting Excavations of claim 6-8 Construction method, it is characterised in that benzene plate (3) described in the step 2 is fixed on the dike (4) by nailing gun, then The shotcrete layer (2) in the benzene plate (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710932535.6A CN107461201B (en) | 2017-09-30 | 2017-09-30 | The construction method of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710932535.6A CN107461201B (en) | 2017-09-30 | 2017-09-30 | The construction method of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation |
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| Publication Number | Publication Date |
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| CN107461201A true CN107461201A (en) | 2017-12-12 |
| CN107461201B CN107461201B (en) | 2019-06-25 |
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Citations (4)
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|---|---|---|---|---|
| CN106089216A (en) * | 2016-07-19 | 2016-11-09 | 北京交通大学 | Rock tunnel breaks rock construction method |
| CN106499417A (en) * | 2016-10-25 | 2017-03-15 | 中铁隧道集团二处有限公司 | The reserved T word rock beam rock pillar constructions of extra-large cross-section resistant Capacity of Shallow-buried Subway Station |
| CN106761778A (en) * | 2017-01-24 | 2017-05-31 | 山东大学 | A kind of underground digging in subway station construction technology suitable for upper-soft lower-hard ground |
| CN107201913A (en) * | 2016-03-16 | 2017-09-26 | 中交公局厦门工程有限公司 | A kind of fine vibration-reducing blasting construction method of cross-over tunnel |
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2017
- 2017-09-30 CN CN201710932535.6A patent/CN107461201B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201913A (en) * | 2016-03-16 | 2017-09-26 | 中交公局厦门工程有限公司 | A kind of fine vibration-reducing blasting construction method of cross-over tunnel |
| CN106089216A (en) * | 2016-07-19 | 2016-11-09 | 北京交通大学 | Rock tunnel breaks rock construction method |
| CN106499417A (en) * | 2016-10-25 | 2017-03-15 | 中铁隧道集团二处有限公司 | The reserved T word rock beam rock pillar constructions of extra-large cross-section resistant Capacity of Shallow-buried Subway Station |
| CN106761778A (en) * | 2017-01-24 | 2017-05-31 | 山东大学 | A kind of underground digging in subway station construction technology suitable for upper-soft lower-hard ground |
Non-Patent Citations (1)
| Title |
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| 刘维林等: "白山抽水蓄能泵站施工期间二期厂房安装间防护工程", 《东北水利水电》 * |
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Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Co-patentee after: CHINA RAILWAY ERJU SECOND ENGINEERING CO.,LTD. Patentee after: China Railway Second Bureau Construction Co.,Ltd. Address before: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Co-patentee before: CHINA RAILWAY ERJU SECOND ENGINEERING CO.,LTD. Patentee before: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. |
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Effective date of registration: 20190815 Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Co-patentee after: CHINA RAILWAY ERJU SECOND ENGINEERING CO.,LTD. Patentee after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Address before: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Co-patentee before: CHINA RAILWAY ERJU SECOND ENGINEERING CO.,LTD. Patentee before: China Railway Second Bureau Construction Co.,Ltd. |
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