CN105421310A - Treatment method and structure for leakage of diversion tunnel lock chamber after lowering down lock - Google Patents

Treatment method and structure for leakage of diversion tunnel lock chamber after lowering down lock Download PDF

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Publication number
CN105421310A
CN105421310A CN201510997207.5A CN201510997207A CN105421310A CN 105421310 A CN105421310 A CN 105421310A CN 201510997207 A CN201510997207 A CN 201510997207A CN 105421310 A CN105421310 A CN 105421310A
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CN
China
Prior art keywords
lock
diversion tunnel
lock chamber
steel sheet
gate
Prior art date
Application number
CN201510997207.5A
Other languages
Chinese (zh)
Inventor
张涛
俞灵光
秦晓亮
彭继乐
赵继勇
余志超
刘淑芳
赵星
张毅驰
孙楠
Original Assignee
中国电建集团贵阳勘测设计研究院有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 中国电建集团贵阳勘测设计研究院有限公司 filed Critical 中国电建集团贵阳勘测设计研究院有限公司
Priority to CN201510997207.5A priority Critical patent/CN105421310A/en
Publication of CN105421310A publication Critical patent/CN105421310A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B9/00Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/02Water-ways
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B3/00Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/16Sealings or joints
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Abstract

The invention discloses a treatment method and structure for leakage of a diversion tunnel lock chamber after lowering down a lock. According to the treatment method and structure, after a lock of a diversion tunnel inlet lock chamber is lowered down, earth rockfill is poured to a front open channel section of the lock chamber to form a cofferdam, such that most part of river water flow is discharged from a permanent structure or other channels; water flow permeating from a bottom sill scouring pit of the lock is stopped from leaking by using a combination of three different materials, namely a Larsen steel sheet pile, padding and underwater concrete; and then diversion tunnel blocking construction is carried out. According to the treatment method and structure, the leaking stopping materials are laid in front of the lock to ensure safety construction of a stopper in the diversion tunnel, and therefore, the situation that stopper construction cannot be carried out quickly after the lock of the diversion tunnel lock chamber is lowered down is solved. Furthermore, the construction cost is effectively reduced while the problem of sill leakage is solved immediately. The treatment method and structure are especially suitable for the cases of relatively large sections, relatively long operation time and tight stopper construction periods of diversion tunnels of large and medium projects.

Description

The processing method of seepage and structure after lock under a kind of Diversion Tunnel lock chamber

Technical field

the present invention relates to processing method and the structure of seepage after lock under a kind of Diversion Tunnel lock chamber, belong to water conservancy and hydropower training works technical field.

Background technology

diversion Tunnel is when the construction of hydropower stations phase, prearranged a kind of construction diversion mode.Diversion Tunnel is generally temporary building, is damming constantly, allows river by Diversion Tunnel from the upstream flow of dam to downstream.After dam engineering is completed, river just can from the dam current by pass overcurrent completed, and namely the mission of Diversion Tunnel terminates, and needs Diversion Tunnel shutoff or separately uses it for anything else.

usually constructed import lock chamber in the import of Diversion Tunnel, in Construction for Hydroelectric Project water conservancy diversion process, the working life of inlet of diversion tunnel lock chamber often runs through the whole construction diversion period, and comparatively large-engineering often reaches the several years.Because in lock chamber, Di Kan position is subject to current scour for a long time, if exist, river bed load is more, lock chamber input elevation is lower, the factor such as longer, Diversion Tunnel extended active duty of free pressure flow alternating periods in lock chamber, the destruction that then in lock chamber, Di Kan position is subject to is more serious, is sometimes reached several meters by the hole degree of depth that water is gone out.Cause under Diversion Tunnel shutoff that lock late gate and end bank can not be completely closed, there is infiltration in various degree in hole, affect the construction of Diversion tunnel plug, and then impact generates electricity the duration.

for the situation that lock late gate under above-mentioned Diversion Tunnel shutoff and end bank can not close completely, at present conventional processing method adopts again to descend lock, repairs lock chamber bank position of going to the bottom.Although current processing method can meet the needs of engineering, the duration is longer, can incur loss through delay the generating duration, particularly greatly influenced for larger power station economic benefit.

Summary of the invention

the object of the invention is to, there is provided that a kind of structure is simple, processing method that construction is easy to seepage after lock under Diversion Tunnel lock chamber and structure, to take processing scheme timely both can meet requirement of engineering, generating construction period can be met again, thus overcome the deficiencies in the prior art.

technical scheme of the present invention is achieved in that

under a kind of Diversion Tunnel lock chamber of the present invention, after lock, the processing method of seepage is that the method is under inlet of diversion tunnel lock chamber after lock, and before lock chamber, open channel section topples over native stone formation cofferdam, makes most of rivers current let out from permanent building or let out under other passages; To cheating the current infiltrated from gate lower bottom Kan Chong, take the three kinds of different materials combination leak stopping of Larsen steel sheet pile, filler and underwater concrete; And then carry out Diversion Tunnel plugging construction.

in preceding method, described Larsen steel sheet pile gos deep into below bosom, gate undershoot hole more than 0.5m, and is close to gate and arranges and guarantee that steel sheet pile is stable vertically.

in preceding method, described filler comprises galvanized wire gabion, clay, loess and cotton-wool, and filler is pressed into by hydraulic pressure effect in the Larsen steel sheet pile gap leaked, and guarantees that it is filled and closely knitly reaches stagnant water effect.

in preceding method, described underwater concrete is the layer of concrete of building covering on filler.

according to the anti-leakage structure after lock under of the present invention a kind of Diversion Tunnel lock chamber that said method is constructed, comprise the lock chamber being located at inlet of diversion tunnel place, the gate in lock chamber is in closed condition; Be provided with earth rock cofferdam before gate, have bottom gate gone out by water rush hole, be provided with one group of Larsen steel sheet pile at the upstream face of gate, be provided with filler bottom Larsen steel sheet pile upstream face, above filler, be provided with layer of concrete.

in aforementioned structure, described one group of Larsen steel sheet pile is close to gate upstream face, and Larsen steel sheet pile bottom extends below bosom, punching hole more than 0.5m.

in aforementioned structure, described filler is the mixed fillers be made up of galvanized wire gabion, clay, loess and cotton-wool.

owing to have employed technique scheme, compared with prior art, the present invention by laying loss circulation material before gate, guarantees plug construction safety in Diversion Tunnel hole in the present invention, to solve under Diversion Tunnel lock chamber after lock, cannot carry out the situation of plug construction fast.The present invention not only has that structure is simple, construction is easy to advantage, and while solving end bank leakage problems in time, effectively reduces construction costs.The present invention is particularly useful for the situation that big-and-middle-sized engineering Diversion Tunnel section larger running time is longer, the plug construction period is tighter.

Accompanying drawing explanation

fig. 1 is structural representation of the present invention.

being labeled as in figure: 1-Diversion Tunnel, 2-lock chamber, 3-gate, 4-earth rock cofferdam, 5-rushes hole, 6-Larsen steel sheet pile, 7-filler, 8-layer of concrete.

Detailed description of the invention

below in conjunction with drawings and Examples, the present invention is described in further detail, but not as any limitation of the invention.

the processing method of seepage after lock under a kind of Diversion Tunnel lock chamber of the present invention, as shown in Figure 1: the method is under inlet of diversion tunnel lock chamber after lock, before lock chamber, open channel section topples over native stone formation cofferdam, makes most of rivers current let out from permanent building or let out under other passages; To cheating the current infiltrated from gate lower bottom Kan Chong, take the three kinds of different materials combination leak stopping of Larsen steel sheet pile, filler and underwater concrete; And then carry out Diversion Tunnel plugging construction.Larsen steel sheet pile gos deep into below bosom, gate undershoot hole more than 0.5m, and is close to gate and arranges and guarantee that steel sheet pile is stable vertically.Filler comprises galvanized wire gabion, clay, loess and cotton-wool, and filler is pressed into by hydraulic pressure effect in the Larsen steel sheet pile gap leaked, and guarantees that it is filled and closely knitly reaches stagnant water effect.Underwater concrete is the layer of concrete of building covering on filler.

according to the anti-leakage structure after lock under of the present invention a kind of Diversion Tunnel lock chamber that said method is constructed, as shown in Figure 1, this structure comprises the lock chamber 2 being located at Diversion Tunnel 1 import department, and the gate 3 in lock chamber 2 is in closed condition; It is characterized in that: before gate 3, be provided with earth rock cofferdam 4, have bottom gate 3 gone out by water rush hole 5, be provided with one group of Larsen steel sheet pile 6 at the upstream face of gate 3, be provided with filler 7 bottom Larsen steel sheet pile 6 upstream face, above filler 7, be provided with layer of concrete 8.One group of Larsen steel sheet pile 6 is close to gate 3 upstream face, and Larsen steel sheet pile 6 bottom extends and rushes below bosom, hole 5 more than 0.5m.Filler 7 is the mixed fillers be made up of galvanized wire gabion, clay, loess and cotton-wool.

Embodiment

this is such as shown in Fig. 1, and in Fig. 1, arrow represents water (flow) direction.This example is main to be implemented in accordance with the following steps:

the first step, in conjunction with river diversion scheme during construction, permanent building is complete build after, to Diversion Tunnel 1 import lock chamber 2 times locks, now find gate leak for 3 times seriously, reason is that end bank washes away for many years, formed comparatively favourable opposition cheat 5, cause carrying out Diversion tunnel plug dry work.

second step, constructs in time in order to ensure Diversion tunnel plug, does not affect power station reservoir impoundment power generation, needs to take engineering measure to gate 3 lower leak stopping, does not affect plug construction.First, suitably pile in lock chamber 2 import open channel section and build earth rock cofferdam 4, for the engineering time is won in gate 3 lower leak stopping, if river discharge is larger need open permanent building earial drainage, guarantee blocking construction safety under gate.

3rd step, after lock chamber import earth rock cofferdam heap has been built, carry out Larsen steel sheet pile 6 and construct, Larsen steel sheet pile 6 has been close to gate 3, guarantees vertically stable.The heap in cofferdam builds height, should be able to guarantee that Larsen steel sheet pile 6 has been constructed, and opens permanent building earial drainage if desired.

4th step, after Larsen steel sheet pile 6 has been constructed, the filler 7 be made up of galvanized wire gabion, clay, loess, cotton-wool etc. of jettisoninging in Larsen steel sheet pile 6 upstream face bottom.Now retaining can be continued, by hydraulic pressure effect, the fillers 7 such as galvanized wire gabion, clay, loess, cotton-wool are pushed in Larsen steel sheet pile 6 gap leaked, guarantee that it is filled and closely knitly reach stagnant water effect, then build underwater concrete and form layer of concrete, densification is carried out to plugging material, prevents from, in retaining process, leaking, now water leakage of gate situation reduces greatly, can carry out plug construction.

Claims (7)

1. the processing method of seepage after lock under Diversion Tunnel lock chamber, is characterized in that: the method is under inlet of diversion tunnel lock chamber after lock, and before lock chamber, open channel section is toppled over native stone and formed cofferdam, makes most of rivers current let out from permanent building or let out under other passages; To cheating the current infiltrated from gate lower bottom Kan Chong, take the three kinds of different materials combination leak stopping of Larsen steel sheet pile, filler and underwater concrete; And then carry out Diversion Tunnel plugging construction.
2. the processing method of seepage after lock under Diversion Tunnel lock chamber according to claim 1, is characterized in that: described Larsen steel sheet pile gos deep into below bosom, gate undershoot hole more than 0.5m, and is close to gate and arranges and guarantee that steel sheet pile is vertically stable.
3. the processing method of seepage after lock under Diversion Tunnel lock chamber according to claim 2, it is characterized in that: described filler comprises galvanized wire gabion, clay, loess and cotton-wool, filler is pressed into by hydraulic pressure effect in the Larsen steel sheet pile gap leaked, and guarantees that it is filled and closely knitly reaches stagnant water effect.
4. the processing method of seepage after lock under Diversion Tunnel lock chamber according to claim 3, is characterized in that: described underwater concrete is the layer of concrete of building covering on filler.
5. the anti-leakage structure under the Diversion Tunnel lock chamber that method is constructed according to the arbitrary claim of claim 1-4 after lock, comprises the lock chamber (2) being located at Diversion Tunnel (1) import department, and the gate (3) in lock chamber (2) is in closed condition; It is characterized in that: be provided with earth rock cofferdam (4) gate (3) is front, gate (3) bottom have gone out by water rush hole (5), one group of Larsen steel sheet pile (6) is provided with at the upstream face of gate (3), be provided with filler (7) bottom Larsen steel sheet pile (6) upstream face, filler (7) top is provided with layer of concrete (8).
6. the anti-leakage structure according to claim 5 under Diversion Tunnel lock chamber after lock, is characterized in that: described one group of Larsen steel sheet pile (6) is close to gate (3) upstream face, and Larsen steel sheet pile (6) bottom extends below (5) bosom, punching hole more than 0.5m.
7. the anti-leakage structure according to claim 5 under Diversion Tunnel lock chamber after lock, is characterized in that: described filler (7) is the mixed fillers be made up of galvanized wire gabion, clay, loess and cotton-wool.
CN201510997207.5A 2015-12-28 2015-12-28 Treatment method and structure for leakage of diversion tunnel lock chamber after lowering down lock CN105421310A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109137850A (en) * 2018-08-17 2019-01-04 中水电第十工程局(郑州)有限公司 A kind of extremely frigid zones winter diversion tunnel construction method that mostly dike shuts off in an opposite direction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007787A1 (en) * 2008-02-06 2009-08-20 Rösch, Günther, Dipl.-Ing. (FH) Water intake for stream water removal from running waters for smaller discharge hydropower plants in the medium and high pressure ranges
CN102011596A (en) * 2010-11-29 2011-04-13 中铁三局集团有限公司 Shield originating or receiving end tunnel portal maintenance process
CN204591292U (en) * 2015-04-27 2015-08-26 浙江大学城市学院 A kind of Novel shield reinforcing structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007787A1 (en) * 2008-02-06 2009-08-20 Rösch, Günther, Dipl.-Ing. (FH) Water intake for stream water removal from running waters for smaller discharge hydropower plants in the medium and high pressure ranges
CN102011596A (en) * 2010-11-29 2011-04-13 中铁三局集团有限公司 Shield originating or receiving end tunnel portal maintenance process
CN204591292U (en) * 2015-04-27 2015-08-26 浙江大学城市学院 A kind of Novel shield reinforcing structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郭金婷等: ""大岗山水电站导流隧洞下闸后渗漏处理"", 《水力发电》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109137850A (en) * 2018-08-17 2019-01-04 中水电第十工程局(郑州)有限公司 A kind of extremely frigid zones winter diversion tunnel construction method that mostly dike shuts off in an opposite direction

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Application publication date: 20160323