CN204753542U - Light section construction branch tunnel block structure - Google Patents

Light section construction branch tunnel block structure Download PDF

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Publication number
CN204753542U
CN204753542U CN201520397349.3U CN201520397349U CN204753542U CN 204753542 U CN204753542 U CN 204753542U CN 201520397349 U CN201520397349 U CN 201520397349U CN 204753542 U CN204753542 U CN 204753542U
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China
Prior art keywords
steel pipe
hole
consolidation grouting
tunnel
construction
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Active
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CN201520397349.3U
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Chinese (zh)
Inventor
张�成
王洪军
翟张宏
张庆
王晓峰
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Powerchina Guiyang Engineering Corp Ltd
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Powerchina Guiyang Engineering Corp Ltd
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Priority to CN201520397349.3U priority Critical patent/CN204753542U/en
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    • 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 utility model discloses a light section construction branch tunnel block structure, including diversion tunnel and the construction branch tunnel continuous with diversion tunnel, be provided with the shutoff concrete in the construction branch tunnel, it has a plurality of consolidation grouting holes to distribute all around at the shutoff concrete, consolidation grouting is downthehole to be provided with pre -buried downthehole steel pipe, it is fixed that pre -buried downthehole steel pipe passes through the fixed welded steel of hand -hole steel pipe, pre -buried downthehole steel pipe intercommunication has vertically draws forth the steel pipe, welded fastening has vertical steel pipe to fix the reinforcing bar on vertically drawing forth the steel pipe, the anchor agent shutoff is adopted in gap between pre -buried downthehole steel pipe and the consolidation grouting hole. The utility model discloses can bore the consolidation grouting hole by perpendicular basement rock in construction branch tunnel to subtract the degree of depth in short consolidation grouting hole, avoided shutoff concrete terminal surface to beat not enough that the grout quality that causes in longer radial hole is poor, construction period is long, and then reached improvement construction quality, practice thrift the cost, the purpose of reduction of erection time.

Description

A kind of light section working tunnel plugging structure
Technical field
The utility model relates to a kind of light section working tunnel plugging structure, belongs to Hydraulic and Hydro-Power Engineering technical field.
Background technology
At present, Hydraulic and Hydro-Power Engineering major part adopts the generating of diversion tunnel formula, for meeting construction of Diversion Tunnels schedule requirement, need design many working tunnel, after working tunnel uses, need carry out shutoff, substitutes diversion tunnel lining cutting country rock, ensures hole lining cutting security of operation.Working tunnel block section consolidation grouting object is in order to Tunnel Reinforcement country rock, closes tunnel periphery rock cranny, improves globality and the non-deformability of Wall Rock of Tunnel, strengthens country rock impermeability, thus deduction and exemption infiltration.In engineering in the past, jacked piles with small section shutoff consolidation grouting mostly adopts beats radiation hole from blocking concrete end face, and the method construction drill is comparatively dark, cannot ensure grouting quality, and difficulty of construction is large, and the duration is relatively long, and construction cost is high.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of light section working tunnel plugging structure.
The utility model is achieved by the following technical programs.
A kind of light section working tunnel plugging structure, the working tunnel comprising diversion tunnel and be connected with diversion tunnel, blocking concrete is provided with in described working tunnel, some consolidation grouting holes are distributed with in blocking concrete surrounding, be provided with steel pipe in embedded hole in described consolidation grouting hole, in described embedded hole, steel pipe is fixed reinforcement welding by hand-hole steel pipe and is fixed.
In described embedded hole, steel pipe connecting is connected with longitudinal protective steel tube for drawing.
Described longitudinal protective steel tube for drawing is welded with longitudinal steel pipe and fixes reinforcing bar.
Gap in described embedded hole between steel pipe and consolidation grouting hole adopts Anchor Agent shutoff.
The beneficial effects of the utility model are:
Compared with prior art, the utility model has following remarkable advantage:
(1) described in the utility model hole plugging structure can vertically be holed by basement rock, and drilling depth is relatively short, and grouting quality is more easily protected, and then improves consolidation grouting quality;
(2) because vertical basement rock is holed, grout hole location and to enter rock severity control simple, avoids that location, radiation hole is difficult, drilling depth is long and the problem of bit freezing, be consolidation grouting construction is convenient;
(3) this structure only need by embedded steel tube and fixing reinforcement welding before blocking concrete is built, and quick for installation, working procedure is simple;
(4) because drillable length shortens, the engineering time shortens than beating radiation hole, thus substantially reduces the construction period.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the annexation enlarged diagram of steel pipe and longitudinal protective steel tube for drawing in consolidation grouting hole, embedded hole in the utility model;
Fig. 3 is section structure schematic diagram of the present utility model.
In figure: 1-consolidation grouting hole, steel pipe in 2-embedded hole, 3-Anchor Agent, reinforcing bar fixed by the longitudinal steel pipe of 4-, and the longitudinal protective steel tube for drawing of 5-, 6-blocking concrete, 7-diversion tunnel, 8-working tunnel, reinforcing bar fixed by 9-hand-hole steel pipe, 10-weld seam.
Detailed description of the invention
Further describe the technical solution of the utility model below, but described in claimed scope is not limited to.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of light section working tunnel plugging structure described in the utility model, the working tunnel 8 comprising diversion tunnel 7 and be connected with diversion tunnel 7, blocking concrete 6 is provided with in described working tunnel 8, some consolidation grouting holes 1 are distributed with in blocking concrete 6 surrounding, be provided with steel pipe 2 in embedded hole in described consolidation grouting hole 1, in described embedded hole, steel pipe 2 is fixed reinforcing bar 9 by hand-hole steel pipe and is welded and fixed.Adopt the technical program, when being construction, consolidation grouting hole 1 can be bored by vertical basement rock in working tunnel 8, shorten the degree of depth in consolidation grouting hole 1, avoid blocking concrete 6 end face and beat the deficiency that the grouting quality caused in longer radial hole is poor, the construction period is long, and then reach raising construction quality, and cost-saving, the object of reduction of erection time.
In described embedded hole, steel pipe 2 is communicated with longitudinal protective steel tube for drawing 5.When constructing, the longitudinal protective steel tube for drawing 5 of steel pipe 2 in each embedded hole is caused outside blocking concrete 6 end face, and according to boring sites in curing and grouting order, steel pipe is numbered.
Described longitudinal protective steel tube for drawing 5 is welded with longitudinal steel pipe and fixes reinforcing bar 4.When constructing, longitudinal protective steel tube for drawing 5 is adopted longitudinal steel pipe at interval of certain distance and is fixed reinforcing bar 4 and be welded and fixed, and longitudinal steel pipe is fixed reinforcing bar 4 and stretched into basement rock, plays and strengthens fixing effect.
Gap in described embedded hole between steel pipe 2 and consolidation grouting hole 1 adopts Anchor Agent 3 shutoff.When preventing concreting, cement paste infiltrates in hole and causes plug-hole.
As shown in Figure 1 to Figure 3, the utility model is when constructing, and mainly step is carried out as follows:
(1) before blocking concrete 6 is built, rig is adopted to carry out the drilling construction in consolidation grouting hole 1;
(2) steel pipe in embedded hole 2 is stretched in consolidation grouting hole 1, adopt hand-hole steel pipe to fix reinforcing bar 9 and steel pipe 2 firm welding in embedded hole at each hell position, as shown in Figure 2, hand-hole steel pipe is fixed for weld seam 10 inside reinforcing bar 9, and makes hand-hole steel pipe fix reinforcing bar 9 to stretch in basement rock;
(3) the longitudinal protective steel tube for drawing 5 of steel pipe in embedded hole 2 is caused outside blocking concrete end face, and according to boring sites in curing and grouting order, steel pipe is numbered;
(4) on longitudinal protective steel tube for drawing 5, adopt longitudinal steel pipe to fix reinforcing bar 4 to be welded and fixed, and longitudinal steel pipe is fixed reinforcing bar 4 and is stretched in basement rock;
(5) gap between steel pipe 2 and consolidation grouting hole 1 in Anchor Agent 3 shutoff embedded hole is adopted.When preventing concreting, cement paste infiltrates in hole and causes plug-hole;
(6), after blocking concrete 6 has been built, consolidation grouting is carried out again according to steel pipe numbering.

Claims (4)

1. a light section working tunnel plugging structure, it is characterized in that: the working tunnel (8) comprising diversion tunnel (7) and be connected with diversion tunnel (7), blocking concrete (6) is provided with in described working tunnel (8), some consolidation grouting holes (1) are distributed with in blocking concrete (6) surrounding, be provided with steel pipe in embedded hole (2) in described consolidation grouting hole (1), in described embedded hole, steel pipe (2) is fixed reinforcing bar (9) by hand-hole steel pipe and is welded and fixed.
2. a kind of light section working tunnel plugging structure according to claim 1, is characterized in that: in described embedded hole, steel pipe (2) is communicated with longitudinal protective steel tube for drawing (5).
3. a kind of light section working tunnel plugging structure according to claim 2, is characterized in that: described longitudinal protective steel tube for drawing (5) is welded with longitudinal steel pipe and fixes reinforcing bar (4).
4. a kind of light section working tunnel plugging structure according to claim 1, is characterized in that: the gap in described embedded hole between steel pipe (2) and consolidation grouting hole (1) adopts Anchor Agent (3) shutoff.
CN201520397349.3U 2015-06-10 2015-06-10 Light section construction branch tunnel block structure Active CN204753542U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520397349.3U CN204753542U (en) 2015-06-10 2015-06-10 Light section construction branch tunnel block structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520397349.3U CN204753542U (en) 2015-06-10 2015-06-10 Light section construction branch tunnel block structure

Publications (1)

Publication Number Publication Date
CN204753542U true CN204753542U (en) 2015-11-11

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CN201520397349.3U Active CN204753542U (en) 2015-06-10 2015-06-10 Light section construction branch tunnel block structure

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929089A (en) * 2015-06-10 2015-09-23 中国电建集团贵阳勘测设计研究院有限公司 Small-section construction adit plugging structure and construction method thereof
CN105586858A (en) * 2016-03-10 2016-05-18 中国电建集团成都勘测设计研究院有限公司 Blocking structure of diversion tunnel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929089A (en) * 2015-06-10 2015-09-23 中国电建集团贵阳勘测设计研究院有限公司 Small-section construction adit plugging structure and construction method thereof
CN105586858A (en) * 2016-03-10 2016-05-18 中国电建集团成都勘测设计研究院有限公司 Blocking structure of diversion tunnel
CN105586858B (en) * 2016-03-10 2018-11-30 中国电建集团成都勘测设计研究院有限公司 A kind of diversion tunnel plugging structure

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