CN103388322A - Method for rebuilding diversion tunnel body into flood discharging tunnel body - Google Patents
Method for rebuilding diversion tunnel body into flood discharging tunnel body Download PDFInfo
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- CN103388322A CN103388322A CN2013103555093A CN201310355509A CN103388322A CN 103388322 A CN103388322 A CN 103388322A CN 2013103555093 A CN2013103555093 A CN 2013103555093A CN 201310355509 A CN201310355509 A CN 201310355509A CN 103388322 A CN103388322 A CN 103388322A
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Abstract
The invention discloses a method for rebuilding a diversion tunnel body into a flood discharging tunnel body. The method comprises the steps of 1, excavating the section of the original diversion tunnel body to the designed expanding excavation section of the flood discharging tunnel in an expanding mode; 2, mounting vertical reinforcing steel bars at tunnel edge walls; 3 pouring tunnel edge wall and tunnel top arch concrete according to construction demands; and 4, after the diversion is finished, pouring bottom plate concrete on an original diversion tunnel bottom plate, wherein the bottom plate concrete is poured in two layers from bottom to top, the pouring elevation of the lower concrete is higher than that of embedded steel plates; after the pouring of the lower layer concrete is finished, the upper layer concrete is poured after the reinforcing steel bars needed to be mounted in the upper layer concrete are welded with the embedded steel plates; the top face elevation of the upper layer concrete is the bottom plate elevation of the flood discharging tunnel after rebuilding; the strength level of the lower layer concrete is lower than that of the upper layer concrete. The method for rebuilding the diversion tunnel body into the flood discharging tunnel body has the main advantages of omitting the demolishing of poured reinforcing steel bar concrete in the built diversion tunnel, and ensuring the function demands on the tunnel in different periods.
Description
Technical field
The present invention relates to the reconstruction of different construction period hydraulic tunnel barrels, especially relate to the reconstruction of Diversion Tunnel barrel and be the method for flood discharging tunnel barrel.
Background technology
Diversion Tunnel is a kind of temporary structure, is that creative engineering builds the dry work condition, with construction period the river course upland water let out by under Diversion Tunnel, after water conservancy diversion finished, plugged and abandoned or part shutoff reconstruction was permanent construction-flood discharging tunnel with tunnel.At present, the reconstruction of diversion tunnel flood discharging tunnel is normally separately established import above Diversion Tunnel, and Diversion Tunnel and flood discharging tunnel adapter section are arranged Cheng Long's form that comes back, and all the other sections are for sharing the barrel section.
At present, the reconstruction method commonly used to built tunnel barrel is first to remove pouring concrete, dig as required again barrel, newly placed concrete then, this method is usually used in the reconstruction that pouring concrete is removed the tunnel that difficulty is little, the concrete removal scope is little, application function is single.For the inlet of diversion tunnel building build up, barrel pouring concrete remove that difficulty is large, the concrete removal scope is large, should meet the water conservancy diversion requirement meets the Diversion Tunnel barrel reconstruction of flood discharge requirement again, above-mentioned reconstruction method commonly used is difficult to accomplish.
Summary of the invention
The object of the invention be to provide a kind of for the inlet of diversion tunnel building build up, the concrete removal difficulty at the built position of Diversion Tunnel barrel is large and scope wide, barrel is the method for flood discharging tunnel barrel in the flood discharge of flood discharge phase and in the Diversion Tunnel barrel reconstruction of water conservancy diversion phase water conservancy diversion.
For achieving the above object, the present invention takes following technical proposals:
Diversion Tunnel barrel reconstruction of the present invention, for the method for flood discharging tunnel barrel, comprises the steps:
The first step: dig former Diversion Tunnel section to the flood discharging tunnel that designs and dig section;
Second step: tunnel abutment wall vertical reinforcement is installed, installation anchoring agent anchor rod and pre-embedded steel slab in precoat tunnel abutment wall and former Diversion Tunnel have watered the certain limit of abutment wall joining place; Described anchoring agent anchor rod from tunnel abutment wall medial shaft to the reinforcement location level layout that stretches out, after vertical reinforcement one end that described anchoring agent anchor rod is positioned at tunnel abutment wall inboard bends vertically upward and the vertical reinforced-bar-welding of tunnel abutment wall inboard;
The 3rd step: according to construction requirement, build tunnel abutment wall and hole crown concrete;
The 4th step: water conservancy diversion is built underplate concrete after finishing on former Diversion Tunnel base plate; Described underplate concrete divides two-layer building from bottom to top; Described lower-layer concrete build the height of elevation lower than described pre-embedded steel slab; Lower-layer concrete build complete after, layer concrete on the reinforcing bar that upper layer concrete domestic demand will be installed and pre-embedded steel slab welding after-pouring; The concrete elevation of top surface in described upper strata is the floor elevation of the flood discharging tunnel after reconstructing; The strength grade of lower-layer concrete is lower than the concrete strength grade in upper strata.
Described tunnel abutment wall vertical reinforcement is that diameter is 25 millimeters along 200 millimeters settings of tunnel longitudinal separation; Described horizontally disposed anchoring agent anchor rod is that diameter is 28 millimeters along 600 millimeters settings of tunnel longitudinal separation; Described pre-embedded steel slab is for vertically to arrange along tunnel.
Advantage of the present invention is mainly reflected in:
1, saved the dismounting of having watered steel concrete in built Diversion Tunnel.
2, guaranteed the functional requirement of different times tunnel.By only build the concrete of tunnel wall body and crown before water conservancy diversion, do not raise floor elevation and do not change the base plate gradient of tunnel, guaranteed the diversion function at water conservancy diversion phase tunnel; By after water conservancy diversion (before being flood discharge) increase base plate and change the base plate gradient, guaranteed the flood discharge function at flood discharge phase tunnel.
3, original reinforcing bar and concrete effect have been given full play to.Newly build the middle and lower part of tunnel side wall concrete before water conservancy diversion, squeeze into anchoring agent anchor rod to reduce the lateral load of abutment wall, make the mounted baseplate reinforcing bar of present situation structure and side wall reinforcing bar meet the force request of new construction; After water conservancy diversion finishes, take full advantage of newly to water underplate concrete and have now and watered the underplate concrete coaction, only need join the temperature steel on top layer in the base plate that newly waters.
It is two-layer that the underplate concrete of 4, newly building is divided into up and down, and the strength grade of lower-layer concrete, lower than the concrete strength grade in upper strata, is compared the concrete of all building the high strength grade, has reduced to a certain extent the generation of hydration heat of concrete.
Description of drawings
Fig. 1 is former tunnel section structural representation before reconstruction.
Fig. 2 is the section structure schematic diagram that the tunnel reconstruction need to dig.
Fig. 3 digs rear tunnel abutment wall reinforcement placement syndeton schematic diagram.
Fig. 4 is the section structure schematic diagram of building after tunnel abutment wall and top, hole concrete.
Fig. 5 is the section structure schematic diagram of building after the tunnel bottom board concrete.
Fig. 6 is the I section structure for amplifying schematic diagram of Fig. 5.
The specific embodiment
Diversion Tunnel barrel reconstruction of the present invention, for the method for flood discharging tunnel barrel, comprises the steps:
The first step: as shown in Figure 1, 2, dig former Diversion Tunnel 1 section to the flood discharging tunnel that designs and dig section;
Second step: as shown in Fig. 3,4, tunnel abutment wall vertical reinforcement 2 is installed, in precoat tunnel abutment wall 9 and former Diversion Tunnel have watered the certain limit of abutment wall 10 joining places, anchoring agent anchor rod 4 and pre-embedded steel slab 5 is installed; Described anchoring agent anchor rod 4 is from the inboard vertical reinforcement 2 position levels of tunnel abutment wall layouts that stretch out, after vertical reinforcement 2 one ends that described anchoring agent anchor rod 4 is positioned at tunnel abutment wall inboard bend vertically upward and the vertical reinforcement 2 of tunnel abutment wall inboard weld;
The 3rd step: as shown in Figure 4, build as requested tunnel abutment wall 9 and hole crown concrete; The tunnel of this moment namely can be used for the water of upstream, water conservancy diversion construction period river course; The water conservancy diversion phase is carried out next step, that is: after finishing
The 4th step: as shown in Figure 5,6, build underplate concrete on former Diversion Tunnel base plate 3; Described underplate concrete divides two-layer building from bottom to top; Described lower-layer concrete 6 build the height of elevation lower than described pre-embedded steel slab 5; Lower-layer concrete 6 build complete after, will need in the concrete seven of upper strata the reinforcing bar of installing 8 and pre-embedded steel slab 5 welding after-pouring upper strata concrete sevens; The elevation of top surface of described upper strata concrete seven is the floor elevation of the flood discharging tunnel after reconstructing; The strength grade of lower-layer concrete 6 is lower than the strength grade of upper strata concrete seven.
Described tunnel abutment wall vertical reinforcement 2 is that diameter is 25 millimeters along 200 millimeters settings of tunnel longitudinal separation; Described horizontally disposed anchoring agent anchor rod 4 is that diameter is 28 millimeters along 600 millimeters settings of tunnel longitudinal separation; Described pre-embedded steel slab 5 is for vertically to arrange along tunnel.
Claims (2)
1. a Diversion Tunnel barrel reconstruction is the method for flood discharging tunnel barrel, it is characterized in that: comprise the steps:
The first step: dig former Diversion Tunnel (1) section to the flood discharging tunnel that designs and dig section;
Second step: tunnel abutment wall vertical reinforcement (2) is installed, installation anchoring agent anchor rod (4) and pre-embedded steel slab (5) in precoat tunnel abutment wall (9) and former Diversion Tunnel have watered the certain limit of abutment wall (10) joining place; Described anchoring agent anchor rod (4) is from inboard vertical reinforcement (2) position of tunnel abutment wall level layouts that stretch out, after vertical reinforcement (2) one ends that described anchoring agent anchor rod (4) is positioned at tunnel abutment wall inboard bend vertically upward and the vertical reinforcement (2) of tunnel abutment wall inboard weld;
The 3rd step: build as requested tunnel abutment wall (9) and hole crown concrete;
The 4th step: build underplate concrete on former Diversion Tunnel base plate (3); Described underplate concrete divides two-layer building from bottom to top; Described lower-layer concrete (6) build the height of elevation lower than described pre-embedded steel slab (5); Lower-layer concrete (6) build complete after, will need in upper layer concrete (7) layer concrete (7) on the reinforcing bar of installing (8) and pre-embedded steel slab (5) welding after-pouring; The elevation of top surface of described upper layer concrete (7) is the floor elevation of the flood discharging tunnel after reconstructing; The strength grade of lower-layer concrete (6) is lower than the strength grade of upper layer concrete (7).
2. the reconstruction of Diversion Tunnel barrel is the method for flood discharging tunnel barrel according to claim 1, it is characterized in that: described tunnel abutment wall vertical reinforcement (2) is that diameter is 25 millimeters along 200 millimeters settings of tunnel longitudinal separation; Described horizontally disposed anchoring agent anchor rod (4) is that diameter is 28 millimeters along 600 millimeters settings of tunnel longitudinal separation; Described pre-embedded steel slab (5) is for vertically to arrange along tunnel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310355509.3A CN103388322B (en) | 2013-08-15 | 2013-08-15 | Method for rebuilding diversion tunnel body into flood discharging tunnel body |
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| CN201310355509.3A CN103388322B (en) | 2013-08-15 | 2013-08-15 | Method for rebuilding diversion tunnel body into flood discharging tunnel body |
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| CN103388322A true CN103388322A (en) | 2013-11-13 |
| CN103388322B CN103388322B (en) | 2015-06-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898880A (en) * | 2014-04-14 | 2014-07-02 | 黄河勘测规划设计有限公司 | Method for rebuilding diversion tunnel of reservoir to form flood discharging tunnel in backfilling mode |
| CN105155484A (en) * | 2015-06-23 | 2015-12-16 | 四川大学 | Method for reconstructing temporary diversion tunnel into permanent flood discharge facility |
| CN105386426A (en) * | 2015-12-18 | 2016-03-09 | 长江勘测规划设计研究有限责任公司 | Construction for transforming diversion tunnel into ecological drainage tunnel controlled by radial gate and method for construction |
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| JPH1193147A (en) * | 1997-09-19 | 1999-04-06 | Mitsubishi Heavy Ind Ltd | Sand discharge system |
| CN101280557A (en) * | 2008-05-23 | 2008-10-08 | 水利部交通部电力工业部南京水利科学研究院 | Method for rebuilding guide current hole to jet flow internal energy dissipating drilled shaft flood discharge hole |
| CN102162230A (en) * | 2011-03-02 | 2011-08-24 | 中国水电顾问集团西北勘测设计研究院 | Design method for reconstructing diversion tunnel into flood discharge tunnel in 'tail-raising' mode |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1359402A1 (en) * | 1986-01-06 | 1987-12-15 | Казахский научно-исследовательский институт энергетики | Hydraulic spillway |
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2013
- 2013-08-15 CN CN201310355509.3A patent/CN103388322B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1193147A (en) * | 1997-09-19 | 1999-04-06 | Mitsubishi Heavy Ind Ltd | Sand discharge system |
| CN101280557A (en) * | 2008-05-23 | 2008-10-08 | 水利部交通部电力工业部南京水利科学研究院 | Method for rebuilding guide current hole to jet flow internal energy dissipating drilled shaft flood discharge hole |
| CN102162230A (en) * | 2011-03-02 | 2011-08-24 | 中国水电顾问集团西北勘测设计研究院 | Design method for reconstructing diversion tunnel into flood discharge tunnel in 'tail-raising' mode |
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| 孙双科: "《小湾水电站大型导流洞改建泄洪洞研究》", 《水力发电》, no. 01, 31 January 2001 (2001-01-31), pages 26 - 31 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898880A (en) * | 2014-04-14 | 2014-07-02 | 黄河勘测规划设计有限公司 | Method for rebuilding diversion tunnel of reservoir to form flood discharging tunnel in backfilling mode |
| CN103898880B (en) * | 2014-04-14 | 2016-03-16 | 黄河勘测规划设计有限公司 | The method of reservoir Diversion Tunnel backfill reconstruction flood discharging tunnel |
| CN105155484A (en) * | 2015-06-23 | 2015-12-16 | 四川大学 | Method for reconstructing temporary diversion tunnel into permanent flood discharge facility |
| CN105155484B (en) * | 2015-06-23 | 2017-04-05 | 四川大学 | By the method that the reconstruction of temporary diversion hole is permanent release floodwatering facility |
| CN105386426A (en) * | 2015-12-18 | 2016-03-09 | 长江勘测规划设计研究有限责任公司 | Construction for transforming diversion tunnel into ecological drainage tunnel controlled by radial gate and method for construction |
| CN105386426B (en) * | 2015-12-18 | 2018-04-20 | 长江勘测规划设计研究有限责任公司 | The ecological drainage tunnel and method that diversion tunnel reconstruction controls for gates of segmental shape |
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| Publication number | Publication date |
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| CN103388322B (en) | 2015-06-10 |
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Address after: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee after: Yellow River Survey Planning and Design Research Institute Co., Ltd. Address before: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee before: Yellow River Engineering Consulting Co., Ltd. |