CN103775102B - Hidden hole drilling is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction method - Google Patents
Hidden hole drilling is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction method Download PDFInfo
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- CN103775102B CN103775102B CN201410047139.1A CN201410047139A CN103775102B CN 103775102 B CN103775102 B CN 103775102B CN 201410047139 A CN201410047139 A CN 201410047139A CN 103775102 B CN103775102 B CN 103775102B
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Abstract
The present invention relates to hidden hole drilling and stablize free face processing landslide construction method with pipe pore-forming backfill concrete, comprising: chamber gunite concrete seals to collapsing; A platform is pulled out in the steel arch frame inside of propping up in fill concrete layer bottom, and utilizes scaffold building operation platform on this platform, on described operation platform, down-the-hole drill is installed; Be drilled into while collapsing chamber through the slag body that collapses by fill concrete layer until down-the-hole drill, described down-the-hole drill exits drilling tool, and described steel pipe is stayed fill concrete layer, collapse slag body and the inside, chamber of collapsing; One end, described steel pipe bottom is communicated with concrete transfer pump tube, penetrates concrete, until be full of concrete in the chamber of collapsing to described steel tube inner spray. The superior effect that hidden hole drilling of the present invention is stablized free face processing landslide construction method with pipe pore-forming backfill concrete is: construction technology is simple, and security risk is low, and efficiency of construction is high, and cost is low, and the scope of application is wide, respond well.
Description
Technical field
The present invention relates to tunnel construction technical field, be specifically related to a kind of hidden hole drilling and stablize free face processing and collapse with pipe pore-forming backfill concreteSide's construction method.
Background technology
In recent years, Chinese Water Conservancy construction of hydropower facilities engineering development is rapid, and it is unprecedented that the quantity of project under construction and scale have all reachedLevel. Tunnel is one common in hydraulic structure, as diversion tunnel, diversion tunnel, flood-discharge tunnel etc. Tunnel is at excavationIn supporting or later stage deformation process construction, tend to because landslide in various degree occurs a variety of causes, as geology, earthquake, establishTake into account the reasons such as human factor. At this moment just need to carry out supporting processing to landslide, and landslide processing itself is exactly a difficulty of constructionGreatly, construction technology that security risk is high, especially for rock crusher and infiltration compared with serious Tunnel Collapse body, landslide is processed and is executedIt is particularly difficult that work just seems. But at present processing in landslide construction, often take bolt-spary supports form, but bolt-spary supports needs choosingSelect suitable supporting time, too early, supporting construction will be born the deformation pressure that country rock produces towards cavern's distortion, so notOnly uneconomical, and can cause Support structure damage; Cross late, country rock can significantly decline because overrelaxation makes rock mass strength,Even cause cavern to destroy. Therefore, bolt-spary supports is generally applied to middle-size and small-size landslide, the landslide body that the Stress relieving of surrounding rocks time is short.In tunnel construction, if while running into the landslide body that renews raw behind the long or chamber of collapsing of large-scale, stress release time, if only take shotcreteSupporting, often faces great risk, as duration risk, security risk and economic risk.
Process in construction at tunnel excavation and deformation after unloading, Tunnel Collapse is processed and is adopted bolt-spary supports form to process, and utilizes anchorSpray is sealed wall-rock crack, to reinforce and to protect country rock, but cannot carry out supporting to landslide extended surface.
For above-mentioned defect, the present invention proposes a kind of hidden hole drilling and stablizes free face processing landslide construction method with pipe pore-forming backfill concrete.
Summary of the invention
In order to overcome defect of the prior art, the object of this invention is to provide a kind of hidden hole drilling with the stable sky that faces of pipe pore-forming backfill concreteFace is processed landslide construction method. Described construction method construction technology is simple, security risk is little.
The present invention is achieved by the following technical solutions:
Hidden hole drilling is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction method, and concrete steps are as follows:
The first step: the chamber gunite concrete that collapses is sealed, prevent landslide after the slag body that collapses hurt sb.'s feelings, and pull out one little in the position, chamber of collapsingPlatform, piles up sand pocket and is sealed, and sprays the concrete of 20cm thickness in described sand pocket outside, strengthens the intensity of sand pocket;
Second step a: platform is pulled out in the steel arch frame inside of propping up in fill concrete layer bottom, utilizes scaffold to take on this platformIf operation platform, installs down-the-hole drill on described operation platform, described operation platform height is according to the construction height of down-the-hole drillDetermine; In the time adopting hidden hole drilling to hole with pipe hole creating technology, the steel pipe surrounding of described down-the-hole drill is drilled with aperture and isThe injected hole of 10-16mm, the centre-to-centre spacing of described injected hole is 30cm, is convenient to slip casting; Treat that down-the-hole drill is by fill concrete layerBe drilled into while collapsing chamber through the slag body that collapses, described down-the-hole drill exits drilling tool, and described steel pipe stays fill concrete layer, slag body and collapsing collapsesInside, chamber;
The 3rd step: one end, described steel pipe bottom is communicated with concrete transfer pump tube, penetrates concrete to described steel tube inner spray, straightTo the chamber of collapsing, be full of concrete; The described chamber of collapsing is connected as a single entity with described fill concrete layer, the slag body that collapses after being full of concrete, forFollow-up construction creates favorable conditions.
Be preferably, in the first step, described sand pocket pile up thickness between 2.5m-3m.
Be preferably, in the first step, described sand pocket adopts gunite concrete layering bonding in the time piling up.
Be preferably, in second step and the 3rd step, described steel pipe adopts seamless steel pipe.
Be preferably, in the 3rd step, described concrete adopts a grating high fluid self dense concrete, ensures that concrete is by instituteState the filling of steel pipe cavity closely knit.
Be preferably, in the 3rd step, described steel pipe, in the chamber of collapsing when gunite concrete, produces because the chamber of collapsing has the slag of collapsing to fall pieceRaw, after completing, shutoff can pile up the part slag body that caves in before pouring concrete, and new in order to make, old concrete is cementing, described inCollapsing after chamber inner concrete cast finishes utilizes concrete transfer pump tube to be in the milk; If when grouting can not meet the demands, need adoptBe in the milk with the redrilling of pipe hole creating technology with hidden hole drilling.
Described concrete slurry adopts Site, and the slurries that inject in steel pipe pass through the loose slag of injected hole filling of steel pipe surroundingThe space of body, makes the loose slag body of tube wall surrounding and concrete fully cemented together, at permanent lining, secondary lining range line profile with profileReliable fixed shell arch ring after becoming to reinforce, i.e. the load of the outside slag body that collapses of supporting, the slag body that can prevent from again collapsing gushes from gap between concreteGo out to cause landslide again, thereby create conditions for next portion of tunnel constructs.
Compared with prior art, hidden hole drilling of the present invention is stablized the excellent of free face processing landslide construction method with pipe pore-forming backfill concreteMore effect is: construction technology is simple, and security risk is low, and efficiency of construction is high, and cost is low, and the scope of application is wide, respond well.
Brief description of the drawings
Fig. 1 is that hidden hole drilling of the present invention is stablized free face processing landslide construction schematic diagram with pipe pore-forming backfill concrete.
Accompanying drawing mark is as follows:
1-has propped up steel arch frame, 2-operation platform, 3-down-the-hole drill, 4-spray and has protected concrete layer, 5-collapse slag body, 6-collapse chamber, 7-is seamless steelPipe, 8-fill concrete layer.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
As shown in Figure 1, hidden hole drilling of the present invention is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction method, specifically walksRapid as follows:
The first step: chamber 6 gunite concretes that collapse are sealed, and the slag body that collapses after preventing from caving in is hurted sb.'s feelings, and pulls out in 6 positions, chamber of collapsingOne chain-wales, piles up sand pocket (not shown) and is sealed, and sprays the concrete of 20cm thickness in described sand pocket outside, addsThe intensity of strong sand pocket; Described sand pocket pile up thickness between 2.5m-3m; Described sand pocket adopts gunite concrete in the time piling upLayering is bonding.
Second step a: platform is pulled out in steel arch frame 1 inside of propping up in fill concrete layer 8 bottom, utilizes pin hand on this platformFrame is taken (not shown) and is established operation platform 2, on described operation platform 2, down-the-hole drill 3 is installed, described operation platform 2 heightDetermine according to the construction height of down-the-hole drill 3; In the time adopting hidden hole drilling to hole with pipe hole creating technology, described hidden hole drillingThe steel pipe surrounding of machine 3 is drilled with the injected hole (not shown) that aperture is 10-16mm, and the centre-to-centre spacing of described injected hole is 30cm,Be convenient to slip casting; Be drilled into while collapsing chamber 6 through the slag body 5 that collapses by fill concrete layer 8 until down-the-hole drill 3, described down-the-hole drill 3 moves backGo out drilling tool (as drill bit), described steel pipe is stayed fill concrete layer 8, collapse slag body 5 and 6 inside, chamber of collapsing;
The 3rd step: one end, described steel pipe bottom is communicated with concrete transfer pump tube (not shown), to described steel tube inner sprayPenetrate concrete, until be full of concrete in the chamber 6 of collapsing; The described chamber 6 of collapsing is full of after concrete with described fill concrete layer 8, collapsesSlag body 5 is connected as a single entity, for follow-up construction creates favorable conditions. In second step and the 3rd step, described steel pipe adopts seamless steelPipe 7; In the 3rd step, described concrete adopts a grating high fluid self dense concrete simultaneously, ensures that concrete is by described steelThe filling of pipe cavity is closely knit.
In the 3rd step, described steel pipe to collapsing chamber 6 interior gunite concrete when, produces because the chamber 6 of collapsing has the slag of collapsing to fall piece,After shutoff completes, before pouring concrete, can pile up the part slag body that caves in, new in order to make, old concrete is cementing, described in the chamber 6 of collapsingAfter finishing, inner concrete cast utilize concrete transfer pump tube to be in the milk; If when grouting can not meet the demands, need to adopt and diveHole drill is in the milk with the redrilling of pipe hole creating technology.
Described concrete slurry adopts Site, and the slurries that inject in steel pipe pass through the loose slag of injected hole filling of steel pipe surroundingThe space of body, makes the loose slag body of tube wall surrounding and concrete fully cemented together, at permanent lining, secondary lining range line profile with profileReliable fixed shell arch ring after becoming to reinforce, the load of the outside slag body 5 that collapses of supporting, can prevent from again collapsing slag body 5 from concrete break jointGap is gushed out and is caused landslide again, thereby creates conditions for next portion of tunnel constructs.
Hidden hole drilling of the present invention is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction technology, is applicable to all tunnels and collapsesSide processes construction, and construction technology is simple. Concrete transfer pump tube of the present invention, drilling tool are existing equipment.
In the time of practice of construction, adopt hidden hole drilling to follow pipe pore-forming backfill concrete to stablize free face and process landslide construction method, both avoided constructionPersonnel stand directly on landslide and carry out job execution below body, have reduced again the situation of personnel's work holdup, thereby have reduced construction safety windDanger, has saved cost, and construction method of the present invention is applied in the large-scale landslide of white Dragon River Xi Ergou tunnel, and has obtained goodEffect well.
The present invention is not limited to above-mentioned embodiment, in the situation that not deviating from flesh and blood of the present invention, and those skilled in the artAny distortion, improvement, the replacement that can expect all fall into scope of the present invention.
Claims (5)
1. hidden hole drilling is stablized free face processing landslide construction method with pipe pore-forming backfill concrete, it is characterized in that, concrete steps are as follows:
The first step: the chamber gunite concrete that collapses is sealed, and pull out a chain-wales in the position, chamber of collapsing, pile up sand pocket and sealed,Spray the concrete of 20cm thickness in described sand pocket outside, strengthen the intensity of sand pocket;
Second step a: platform is pulled out in the steel arch frame inside of propping up in fill concrete layer bottom, utilizes scaffold to take on this platformIf operation platform, installs down-the-hole drill on described operation platform, described operation platform height is according to the construction height of down-the-hole drillDetermine; In the time adopting hidden hole drilling to hole with pipe hole creating technology, the steel pipe surrounding of described down-the-hole drill is drilled with aperture and isThe injected hole of 10-16mm, the centre-to-centre spacing of described injected hole is 30cm; Treat that down-the-hole drill is bored through the slag body that collapses by fill concrete layerWhen collapsing chamber, described down-the-hole drill exits drilling tool, and described steel pipe is stayed fill concrete layer, collapse slag body and the inside, chamber of collapsing;
The 3rd step: one end, described steel pipe bottom is communicated with concrete transfer pump tube, penetrates concrete to described steel tube inner spray, straightTo the chamber of collapsing, be full of concrete; The described chamber of collapsing is connected as a single entity with described fill concrete layer, the slag body that collapses after being full of concrete, forFollow-up construction creates favorable conditions;
In the 3rd step, described steel pipe, can heap before pouring concrete after shutoff completes in the chamber of collapsing when gunite concreteThe long-pending part slag body that caves in, described in collapse after chamber inner concrete cast finishes and utilize concrete transfer pump tube to be in the milk; If groutingCan not meet the demands time, need to adopt hidden hole drilling to be in the milk with the redrilling of pipe hole creating technology.
2. hidden hole drilling according to claim 1 is stablized free face processing landslide construction method, its feature with pipe pore-forming backfill concreteBe, in the first step, described sand pocket pile up thickness between 2.5m-3m.
3. hidden hole drilling according to claim 1 is stablized free face processing landslide construction method, its feature with pipe pore-forming backfill concreteBe, in the first step, described sand pocket adopts gunite concrete layering bonding in the time piling up.
4. hidden hole drilling according to claim 1 is stablized free face processing landslide construction method, its feature with pipe pore-forming backfill concreteBe, in second step and the 3rd step, described steel pipe adopts seamless steel pipe.
5. hidden hole drilling according to claim 1 is stablized free face processing landslide construction method, its feature with pipe pore-forming backfill concreteBe, in the 3rd step, described concrete adopts a grating high fluid self dense concrete.
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| CN201410047139.1A CN103775102B (en) | 2014-02-11 | 2014-02-11 | Hidden hole drilling is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction method |
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| CN201410047139.1A CN103775102B (en) | 2014-02-11 | 2014-02-11 | Hidden hole drilling is stablized free face with pipe pore-forming backfill concrete and is processed landslide construction method |
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| CN103775102B true CN103775102B (en) | 2016-06-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701194A (en) * | 2017-09-14 | 2018-02-16 | 中铁十九局集团第二工程有限公司 | A kind of construction method repaired to tunnel after landslide |
| CN108843344B (en) * | 2018-06-05 | 2019-11-26 | 中铁二局集团有限公司 | One kind is collapsed the closely knit dam filling construction of chamber |
| CN110067573A (en) * | 2019-04-26 | 2019-07-30 | 西和县中宝矿业有限公司 | A kind of quick improvement and the construction method for passing through the crushed zone that caved in |
| CN113482657A (en) * | 2021-06-21 | 2021-10-08 | 中铁十六局集团第三工程有限公司 | Tunnel fault closed-door collapse processing and reinforcing method |
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Inventor after: Jiang Lingyu Inventor after: Yuan Xingchao Inventor after: He Pengcheng Inventor after: Wu Gaojian Inventor after: Guo Wenjie Inventor after: Zhang Weilin Inventor after: Yang Wanhua Inventor after: Zhang Li Inventor after: Sun Linzhi Inventor after: Liang Tao Inventor before: Jiang Lingyu Inventor before: Zhang Weilin Inventor before: Yang Wanhua |
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Effective date of registration: 20160413 Address after: 610065 Jinjiang District City, Chengdu Province, the Fourth Ring Road, east section of No. 8, No. Applicant after: Sinohydro Bureau 5 Co., Ltd. Address before: 610066, hydropower Bureau, No. five, building, 8 East Fourth Ring Road, ring road, Sichuan, Chengdu Applicant before: Jiang Lingyu |
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