CN107461201B - The construction method of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation - Google Patents
The construction method of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation Download PDFInfo
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- CN107461201B CN107461201B CN201710932535.6A CN201710932535A CN107461201B CN 107461201 B CN107461201 B CN 107461201B CN 201710932535 A CN201710932535 A CN 201710932535A CN 107461201 B CN107461201 B CN 107461201B
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- inverted arch
- benzene plate
- dike
- construction
- layer
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000010276 construction Methods 0.000 title claims abstract description 41
- 238000009412 basement excavation Methods 0.000 title claims abstract description 39
- 239000011435 rock Substances 0.000 title claims abstract description 34
- 238000005422 blasting Methods 0.000 title claims abstract description 33
- 238000013016 damping Methods 0.000 title claims abstract description 21
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 137
- 239000004567 concrete Substances 0.000 claims abstract description 51
- 238000004880 explosion Methods 0.000 claims abstract description 29
- 239000000872 buffer Substances 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 12
- 239000011378 shotcrete Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 11
- 230000009514 concussion Effects 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of damping protection systems of hard rock subway station in middle hole method Blasting Excavation, including the benzene plate being laid with respectively on side wall and inverted arch, it is provided with concrete layer in the benzene plate, buffers dike in the explosion of the reserved 0.8m-1m thickness of side wall and inverted arch respectively in adjacent cavern excavation；The invention also discloses its construction method, including hole in excavating, the two sidewalls Zhong Dong are backbreak 10cm-15cm depth when excavation, and inverted arch is backbreak 15cm-20cm depth；It is laid with benzene plate 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 dike of 0.8m-1.0m thickness is reserved at the top of the second layer；When the wide open digging in side, explosion is carried out again after the dike that median septum reserves 0.8m-1.0m thickness.Benzene plate and concrete layer are set on side wall and inverted arch, and reserves explosion in adjacent cavern excavation and buffers dike, the destruction shaken to gib can be reduced to greatest extent, guarantee construction safety.
Description
Technical field
The present invention relates to underground engineering construction field, in particular to hard rock subway station in a kind of middle hole method Blasting Excavation
The construction method of damping protection system.
Background technique
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 a beam, column connection, it is general use in the construction such as hole method, side hole method, column hole method and cavern-pile method, core concept is the section that becomes larger
For middle light section, construction safety degree is improved.
Construction with middle tunnel method is exactly first to excavate middle section (middle hole), and beam, rod structure are applied in middle hole, then excavates two again
Side section (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 complex, but two sides hole symmetrical construction, is easier to solve lateral pressure when therefrom hole gib is transferred on beam column
Uneven lateral pressure problem, surface subsidence caused by constructing 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 easy to get guarantee.Hole method is quick-fried in
Hard rock subway station in digging is broken, with high security, flexibility is good, strong operability, mechanization degree is low, efficiency of being unearthed
The advantages that less is interfered between high, process.
Usually in construction with middle tunnel method means of defence, it all will not excavate rock stratum and gib is separated, and lead to explosion
Vibration is more serious to the destruction of gib, and on the other hand, due to not being laid with benzene plate at rock stratum, gunite concrete is straight with rock stratum
Contact, thus it is poor in the wide open Surface Quality of Concrete for digging rear wall in side, the concrete that fills spray is carried out, to a certain degree
On increase project cost.
Summary of the invention
It is an object of the invention to overcome in the existing construction with middle tunnel method in the presence of the prior art to break gib
It is bad more serious, and the deficiency that Surface Quality of Concrete is poor, hard rock subway station in a kind of middle hole method Blasting Excavation is provided
The construction method of damping protection system.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
The damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation, including on side wall and inverted arch respectively
The benzene plate of laying is provided with concrete layer in the benzene plate, reserves respectively in side wall and inverted arch in adjacent cavern excavation
The explosion of 0.8m-1m thickness buffers dike.
Benzene plate and concrete layer are set on side wall and inverted arch, and reserve the explosion of 0.8m-1m thickness respectively in adjacent cavern
Dike is buffered, to form isolation buffer structure and explosion energy-absorbing protection structure, when Blasting Excavation can reduce vibration to greatest extent
Destruction to gib guarantees 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 avoids the concrete that fills spray, has saved cost to a certain extent.
Preferably, it is laid between the concrete layer and the benzene plate on inverted arch and is additionally provided with rubble separation layer, it is described
Rubble separation layer is that have good energy-absorbing buffering effect, by rubble and the molecular loose structure of sand so as to reduce explosion
Shake the influence to inverted arch gib.
Preferably, the benzene plate with a thickness of 3cm-8cm.
Preferably, the concrete layer with a thickness of 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 parties of the damping protection system of hard rock subway station in middle hole method Blasting Excavation
Method, the damping protection system including hard rock subway station in a kind of any above-mentioned middle hole method Blasting Excavation, construction method are as follows:
Step 1: hole in excavation, the two sidewalls Zhong Dong are backbreak 10cm-15cm depth when excavation, and inverted arch is backbreak 15cm-20cm depth
Degree；
Step 2: being laid with benzene plate in the rock stratum face of side wall and inverted arch respectively and concrete layer filling-in be arranged, as interim branch
The isolation buffer structure of shield；
Step 3: installing the fashioned iron of gib, and shotcrete with steel bar nets is to design thickness；
Step 4: after the safe step pitch of first layer reaches requirement, after reserving the dike of 0.8m-1.0m thickness at the top of the second layer
Explosion is carried out again；
Step 5: when the wide open digging in side, explosion is carried out again after the dike that median septum reserves 0.8m-1.0m thickness.
It backbreaks when hole to side wall and inverted arch in excavation, explosion energy-absorbing is formed using benzene plate and concrete layer after backbreaking and is protected
Protection structure, and adjacent chamber blasting excavate when leave 0.8-1.0m explosion protect dike, explosion can be reduced to greatest extent
The destruction to gib is shaken, guarantees 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 in inverted arch construction, then described
Concrete layer is laid on rubble separation layer, the rubble separation layer is that had good by rubble and the molecular loose structure of sand
Energy-absorbing buffering effect, so as to reduce influence of the concussion of blasting to inverted arch gib.
Preferably, the dike reserved in the step 4 and step 5 is excavated using digging machine, and to interim inverted arch bottom with
The interim median septum concrete that fills spray can reduce concussion of blasting to gib by the way of mechanical excavation to greatest extent
It destroys, guarantees construction safety.
Preferably, benzene plate described in the step 2 is fixed on the dike by nailing gun, 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
The explosion of 0.8m-1m thickness buffers dike, to form isolation buffer structure and explosion energy-absorbing protection structure, can reduce to greatest extent
The destruction to gib is shaken, guarantees construction safety；And benzene plate is set between the dike and concrete layer, it is ensured that
The Surface Quality of Concrete for excavating rear wall and inverted arch, avoids the concrete that fills spray, 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 has good energy-absorbing buffering effect, so as to reduce concussion of blasting to the shadow of inverted arch gib
It rings.
(2) it backbreaks when hole to side wall and inverted arch in excavating, explosion is formed using benzene plate and concrete layer after backbreaking and is inhaled
Structure can be protected, and leaves the explosion protection dike of 0.8-1.0m when adjacent chamber blasting is excavated, can be reduced to greatest extent
Destruction of the concussion of blasting to gib guarantees construction safety；Benzene plate is first laid in rock stratum face, and concrete layer filling-in is set again, it can
To guarantee 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 interim inverted arch bottom and interim the median septum concrete that fills spray can be reduced quick-fried to greatest extent by the way of mechanical excavation
Destruction of the broken vibration to gib, guarantees construction safety.
Detailed description of the invention:
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 schematic diagram for the damping protection system being arranged in the structure of hole in top layer in Fig. 1.
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 the figure: 1- gib, 2- concrete layer, 3- benzene plate, 4- dike, 5- rubble separation layer, 6- center pillar.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
As shown in Figs. 1-2, center pillar 6 is the component for mainly undertaking upper load in construction with middle tunnel method, during upper load passes through
Load is passed to center pillar 6 by 6 two sides arch of column 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 which that more gib 1 is set to control Rock And Soil deformation.
In order to reduce destruction of the explosion to gib 1 as far as possible, the present invention provides in a kind of middle hole method Blasting Excavation
The damping protection system of hard rock subway station is set in the benzene plate 3 including the benzene plate 3 being laid with respectively on side wall and inverted arch
It is equipped with concrete layer 2, buffers dike 4 in the explosion of the reserved 0.8m-1m thickness of side wall and inverted arch respectively in adjacent cavern excavation.
Be laid between the concrete layer 2 and the benzene plate 3 on inverted arch and be additionally provided with rubble separation layer 5, the benzene plate 3 with a thickness of
3cm-8cm, the benzene plate 3 are fixed on the dike 4 by nailing gun, the concrete layer 2 with a thickness of 10cm-15cm.
Benzene plate 3 and concrete layer 2 are respectively set on side wall and inverted arch, and reserves 0.8m-1m in adjacent cavern excavation
Thick explosion buffers dike 4, so that isolation buffer structure and explosion energy-absorbing protection structure are formed, it can maximum limit in Blasting Excavation
Degree reduces destruction of the vibration to gib 1, guarantees construction safety；And benzene plate is set between the dike 4 and concrete layer 2
3, it is ensured that the Surface Quality of Concrete for excavating rear wall and inverted arch avoids the concrete that fills spray, and saves to a certain extent
Cost；It is laid between the concrete layer 2 and the benzene plate 3 on inverted arch and is additionally provided with rubble separation layer 5, the rubble isolation
Layer is that have good energy-absorbing buffering effect by rubble and the molecular loose structure of sand, 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 systems of hard rock subway station in middle hole method Blasting Excavation
Construction method, the damping protection system including hard rock subway station in a kind of above-mentioned middle hole method Blasting Excavation, construction party
Method are as follows:
Step 1: hole in excavation, the two sidewalls Zhong Dong are backbreak 10cm-15cm depth when excavation, and inverted arch is backbreak 15cm-20cm depth
Degree；
Step 2: it is laid with benzene plate 3 and 2 filling-in of shotcrete layer in the rock stratum face of side wall, in the rock stratum face Xian Pu of inverted arch
If rubble separation layer 5, then 2 filling-in of shotcrete layer on the rubble separation layer 5, the isolation buffer as gib 1
Structure；
Step 3: the fashioned iron of installation gib 1, 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 dike 4 at the top of the second layer again
Explosion is carried out, reserved dike 4 is excavated using digging machine, and is filled spray concrete to interim inverted arch bottom:
Step 5: when the wide open digging in side, explosion, reserved rock are carried out again after the dike 4 that median septum reserves 0.8m-1.0m thickness
Wall 4 is excavated using digging machine, and is filled spray concrete to interim median septum.
Explosion energy-absorbing is formed using benzene plate 3 and concrete layer 2 after backbreaking and protects structure, and when adjacent chamber blasting is excavated
The explosion protection dike 4 for leaving 0.8-1.0m thickness, can reduce destruction of the concussion of blasting to gib 1 to greatest extent, guarantee
Construction safety；3 fill-before-fire concrete layer of benzene plate, 2 filling-in is first laid in rock stratum face, it is ensured that excavates the mixed of rear wall and inverted arch
Solidifying soil presentation quality, avoids the concrete that fills spray, has saved cost to a certain extent；Reserved dike 4 is using mechanical excavation
Mode can reduce destruction of the concussion of blasting to gib 1 to greatest extent, guarantee 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 embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (6)
1. the construction method of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation, which is characterized in that institute
The damping protection system for stating hard rock subway station in the method Blasting Excavation of hole includes the benzene plate being laid with respectively on side wall and inverted arch
(3), it is provided on the benzene plate (3) concrete layer (2), is reserved respectively in side wall and inverted arch in adjacent cavern excavation
The explosion of 0.8m-1m thickness buffers dike (4), construction method are as follows:
Step 1: hole in excavation, the two sidewalls Zhong Dong are backbreak 10cm-15cm depth when excavation, and inverted arch is backbreak 15cm-20cm depth；
Step 2: it is laid with benzene plate (3) 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 fashioned iron of installation gib (1), and shotcrete with steel bar nets is to design thickness；
Step 4: after the safe step pitch of first layer reaches requirement, after reserving the dike (4) of 0.8m-1.0m thickness at the top of the second layer
Explosion is carried out again；
Step 5: when the wide open digging in side, explosion is carried out again after the dike (4) that median septum reserves 0.8m-1.0m thickness.
2. the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1
Method, which is characterized in that in the step 2, be laid between the concrete layer (2) on inverted arch and the benzene plate (3) also
Equipped with rubble separation layer (5), rubble separation layer (5) first are laid on the benzene plate (3) in inverted arch construction, then in the rubble
Concrete layer (2) are laid on separation layer (5).
3. the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1
Method, which is characterized 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.
4. the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1 to 3
Construction method, which is characterized in that benzene plate described in the step 2 (3) is fixed on the dike (4) by nailing gun, then
The shotcrete layer (2) on the benzene plate (3).
5. the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1
Method, which is characterized in that the benzene plate (3) with a thickness of 3cm-8cm.
6. the construction of the damping protection system of hard rock subway station in a kind of middle hole method Blasting Excavation according to claim 1
Method, which is characterized in that the concrete layer (2) with a thickness of 10cm-15cm.
Priority Applications (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 |
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 CN107461201A (en) | 2017-12-12 |
| CN107461201B true CN107461201B (en) | 2019-06-25 |
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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 |
-
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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| 白山抽水蓄能泵站施工期间二期厂房安装间防护工程;刘维林等;《东北水利水电》;20000930(第9期);第101-11页 |
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| CN107461201A (en) | 2017-12-12 |
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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. |