CN109209387A - Concrete grout cover construction method under deep water level - Google Patents
Concrete grout cover construction method under deep water level Download PDFInfo
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- CN109209387A CN109209387A CN201811079362.9A CN201811079362A CN109209387A CN 109209387 A CN109209387 A CN 109209387A CN 201811079362 A CN201811079362 A CN 201811079362A CN 109209387 A CN109209387 A CN 109209387A
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- water level
- grouting pipeline
- deep water
- casing
- construction method
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to concrete grout cover construction methods under deep water level, the radial grouting pipeline of steel-pipe welding tree root is first used, then is given for grouting and sets φ 108mm casing 5, one group of valve is installed on each casing, assembling finish check it is errorless after, fixed stably rope is slowly put down with stable car, radial grouting pipeline is installed when putting, put into the rubble that 1-2cm and 2-4cm mixture proportion is 1:2, throwing, which is spread, uniformly then to put into the sand bed of 20-30cm thickness, and slip casting forms grout cover.The present invention can quickly and effectively drain water shutoff, guarantee the normal extension of pit shaft.
Description
Technical field
The present invention relates to concrete grout cover construction methods under deep water level.
Background technique
Shandong Province's nonmetallic ore main shaft is tunneled to the large-scale prominent watered-out well accident of generation at 162.5 meters, and maximal water*.inrush quality is every
3000 cubes of hour or more, huge loss is caused, without effectively draining water shutoff technology, pit shaft cannot normally extend.
Summary of the invention
To overcome the shortcomings of existing technologies, the present invention provides concrete grout cover construction method under a kind of deep water level, this hair
Bright technical solution is:
(1) the radial grouting pipeline of steel-pipe welding tree root is first used, supervisor is located at middle position, and branch pipe is welded direct on supervisor,
When manifold portion welds, length is required to arrange in pairs or groups on the same face, and be the lower angle of depression, radial grouting pipeline integral part is most
Big outer diameter is φ 3.2m, is highly 2.1m；
(2) it is given for grouting and sets φ 108mm casing 5, casing and radial grouting pipeline are welded into one, radiated
Shape grouting pipeline is tilted in middle position, casing to the supervisor of radial grouting pipeline, is formed angle with the borehole wall, is covered at each
Manage upper and lower two fragment positions welding guide collar, entire outer diameter 4.3m；
(3) one group of valve is installed on each casing, it is desirable that be DN100/64 slide valve, upper part installs gland, at valve
In closed state, then valve group part is all bandaged with old air duct fabric；
(4) assembling finish check it is errorless after, fixed stably rope is slowly put down with stable car, radial grouting pipeline be installed when putting, general
The dedicated snap-gauge of the supervisor of radial grouting pipeline and wire rope clamps jail；
It is accurate before decentralization to measure well depth, main rope length and grouting pipeline length are strictly measured in decentralization process, it is cumulative in time
Total length out, and perform comparison work；
(5) rubble that investment 1-2cm and 2-4cm mixture proportion is 1:2, throwing is spread will uniformly, and special messenger is measured with plummet surrounding, in time
It grasps situation to adjust in time, then puts into the sand bed of 20-30cm thickness；
(6) slip casting is initially injected a certain amount of clear water, reinjects 3-5 cubes 50% of calcium chloride solution, rush under dilute, neutralization pit with
And the acid water in grouting pipe forms grout cover according to cement grout is sequentially implanted sequentially from thin to thick；
Slurries injection rate: should pack gravel layer gap, pack portion wall-rock crack as far as possible again, while must be taken into consideration biggish
Number of dropouts.Specific calculating is as follows:
V1=1\4Лd2ηHλ
=3.14×4.52÷4×20%×6×1.5=29 m3
V2=λл(D/2+R)2Hηβ/m
=1.5 × 3.14 × (5.5/2+3.0) m3 of 2 × 1.5 × 3% × 0.9/0.85=74
V1+V2=103m3
D-pit shaft net diameter (m), η-rock fracture rate (0.5% -3%), H-slip casting section is high (m), λ-slurries damage
It loses coefficient (1.2-1.5), D-pit shaft famine diameter (m), R-grout spreading range (m), β-slurries effectively fill in crack
Fill out coefficient, general 0.8-0.9,0.9, m-slurries calculus rate is taken, ratio of mud 1:1 slurries calculus rate is 0.85, is taken here
0.85。
Being converted into cement weight by 1:1 slurries is 103 m3 × 0.75=77.25t
(7) slip casting work enters later stage and must be controlled in strict accordance with dynamic equilibrium standard, the controlling party of dynamic equilibrium
Method uses flow control method, and according to grouting serous fluid flow strict control displacement, aequum cannot be less than 20 cubic metres；
(8) after Cementer is made, top is thrown again spreads one layer of protective agent, and forms certain isolated protective layer, and draining makes in time
Quickly recover to raw water position.
It is described supervisor use φ 60mm seamless steel pipe, the branch pipe use φ 20mm, the steel pipe of upper cloth φ 8mm small sircle hole,
Spacing 200mm is uniformly staggered.
The lower angle of depression is 15.
The angle that step (2) middle sleeve and the borehole wall are formed is 3o, vertical height 6m.
The cement grout uses cement, and 50% LHG solution is added after slurries are soon stirred, and amount accounts for cement weight
The 3% of amount, stirs evenly, and cement grout proportion uses 1.5:1,1.25:1,1:1,0.75:1 and 0.6:1.
The invention has the benefit that slip casting terminates pit shaft draining after a week on earth, measuring the total water leakage of pit shaft is 2.1
M3/h, main original shaft wall leak point, water sealing effect (3000-2.1)/3000=99.9% are with the naked eye seen and look into shaft bottom grout cover surface
There is no obvious EXIT POINT, can quickly drain water shutoff；Pressure 5.0Mpa is surveyed by casing, water sealing effect and pressure voltage reach design
It is required that giving slip casting work for further work face has established successful basis, pit shaft can normally extend.
Detailed description of the invention
Fig. 1 is agent structure schematic diagram of the invention.
Specific embodiment
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art
Member it should be understood that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form into
Row modifications or substitutions, but these modifications and replacement are fallen within the protection scope of the present invention.
Referring to Fig. 1, the present invention relates to concrete grout cover construction methods under a kind of deep water level:
(1) first use the radial grouting pipeline of steel-pipe welding tree root, supervisor 1 is located at middle position, the supervisor 1 using φ 60mm without
Steel pipe is stitched, branch pipe 2 is welded direct on supervisor 1, and the branch pipe 2 uses φ 20mm, the steel pipe of upper cloth φ 8mm small sircle hole, spacing
200mm is uniformly staggered, and when 2 part of branch pipe is welded, requires length to arrange in pairs or groups on the same face, and be the lower angle of depression, angle 15
, it is highly 2.1m that radial grouting pipeline integral part maximum outside diameter, which is φ 3.2m,；
(2) 5 casings 3 for setting φ 108mm are given for grouting, casing 3 and radial grouting pipeline are welded into one,
Radial grouting pipeline is tilted in middle position, casing 3 to the supervisor 1 of radial grouting pipeline, forms angle, folder with the borehole wall 5
Angle is 3o, vertical height 6m, welds guide collar, entire outer diameter 4.3m in each upper and lower two fragment position of casing 3；
(3) one group of valve 4 is installed on each casing 3, it is desirable that be DN100/64 slide valve, upper part installs gland, valve 4
It is in close state, is then all bandaged valve group part with old air duct fabric；
(4) assembling finish check it is errorless after, fixed stably rope is slowly put down with stable car, radial grouting pipeline be installed when putting, general
The dedicated snap-gauge of the supervisor 1 of radial grouting pipeline and wire rope clamps jail；
It is accurate before decentralization to measure well depth, main rope length and grouting pipeline length are strictly measured in decentralization process, it is cumulative in time
Total length out, and perform comparison work；
(5) rubble that investment 1-2cm and 2-4cm mixture proportion is 1:2, throwing is spread will uniformly, and special messenger is measured with plummet surrounding, in time
It grasps situation to adjust in time, then puts into the sand bed of 20-30cm thickness；
(6) slip casting is initially injected a certain amount of clear water, reinjects 3-5 cubes 50% of calcium chloride solution, rush under dilute, neutralization pit with
And the acid water in grouting pipe forms grout cover 6 according to cement grout is sequentially implanted sequentially from thin to thick；
The cement grout uses cement, and 50% LHG solution is added after slurries are soon stirred, and amount accounts for cement weight
3%, it stirs evenly, cement grout proportion uses 1.5:1,1.25:1,1:1,0.75:1 and 0.6:1；
Slurries injection rate: should pack gravel layer gap, pack portion wall-rock crack as far as possible again, while must be taken into consideration biggish
Number of dropouts.Specific calculating is as follows:
V1=1\4Лd2ηHλ
=3.14×4.52÷4×20%×6×1.5=29 m3
V2=λл(D/2+R)2Hηβ/m
=1.5 × 3.14 × (5.5/2+3.0) m3 of 2 × 1.5 × 3% × 0.9/0.85=74
V1+V2=103m3
D-pit shaft net diameter (m), η-rock fracture rate (0.5% -3%), H-slip casting section is high (m), λ-slurries damage
It loses coefficient (1.2-1.5), D-pit shaft famine diameter (m), R-grout spreading range (m), β-slurries effectively fill in crack
Fill out coefficient, general 0.8-0.9,0.9, m-slurries calculus rate is taken, ratio of mud 1:1 slurries calculus rate is 0.85, is taken here
0.85。
Being converted into cement weight by 1:1 slurries is 103 m3 × 0.75=77.25t；
(7) slip casting work enters later stage and must be controlled in strict accordance with dynamic equilibrium standard, the controlling party of dynamic equilibrium
Method uses flow control method, and according to grouting serous fluid flow strict control displacement, aequum cannot be less than 20 cubic metres；
(8) after Cementer is made, top is thrown again spreads one layer of protective agent, and forms certain isolated protective layer, and draining makes in time
Quickly recover to raw water position.
The technology can be applied in all kinds of mine construction engineerings, repeatedly effectively solve prominent watered-out well accident.
Claims (5)
1. concrete grout cover construction method under deep water level, it is characterised in that:
(1) the radial grouting pipeline of steel-pipe welding tree root is first used, supervisor is located at middle position, and branch pipe is welded direct on supervisor,
When manifold portion welds, length is required to arrange in pairs or groups on the same face, and be the lower angle of depression, radial grouting pipeline integral part is most
Big outer diameter is φ 3.2m, is highly 2.1m；
(2) it is given for grouting and sets φ 108mm casing 5, casing and radial grouting pipeline are welded into one, radiated
Shape grouting pipeline is tilted in middle position, casing to the supervisor of radial grouting pipeline, is formed angle with the borehole wall, is covered at each
Manage upper and lower two fragment positions welding guide collar, entire outer diameter 4.3m；
(3) one group of valve is installed on each casing, it is desirable that be DN100/64 slide valve, upper part installs gland, at valve
In closed state, then valve group part is all bandaged with old air duct fabric；
(4) assembling finish check it is errorless after, fixed stably rope is slowly put down with stable car, radial grouting pipeline be installed when putting, general
The dedicated snap-gauge of the supervisor of radial grouting pipeline and wire rope clamps jail；
(5) rubble that investment 1-2cm and 2-4cm mixture proportion is 1:2, throwing, which is spread, uniformly then to put into the sand of 20-30cm thickness
Layer；
(6) slip casting is initially injected a certain amount of clear water, reinjects 3-5 cubes 50% of calcium chloride solution, rush under dilute, neutralization pit with
And the acid water in grouting pipe forms grout cover according to cement grout is sequentially implanted sequentially from thin to thick；
(7) slip casting work enters later stage and must be controlled in strict accordance with dynamic equilibrium standard, the controlling party of dynamic equilibrium
Method uses flow control method, and according to grouting serous fluid flow strict control displacement, aequum cannot be less than 20 cubic metres；
(8) after Cementer is made, top is thrown again spreads one layer of protective agent, and forms certain isolated protective layer, and draining makes in time
Quickly recover to raw water position.
2. concrete grout cover construction method under deep water level according to claim 1, it is characterised in that: the supervisor uses
φ 60mm seamless steel pipe, the branch pipe use φ 20mm, the steel pipe of upper cloth φ 8mm small sircle hole, and spacing 200mm is uniformly staggered.
3. concrete grout cover construction method under deep water level according to claim 1, it is characterised in that: the lower angle of depression is
15˚。
4. concrete grout cover construction method under deep water level according to claim 1, it is characterised in that: set in step (2)
The angle that pipe is formed with the borehole wall is 3o, vertical height 6m.
5. concrete grout cover construction method under deep water level according to claim 1, it is characterised in that: the cement grout
Using cement, 50% LHG solution is added after slurries are soon stirred, amount accounts for the 3% of cement weight, stirs evenly,
Cement grout proportion uses 1.5:1,1.25:1,1:1,0.75:1 and 0.6:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811079362.9A CN109209387A (en) | 2018-09-17 | 2018-09-17 | Concrete grout cover construction method under deep water level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811079362.9A CN109209387A (en) | 2018-09-17 | 2018-09-17 | Concrete grout cover construction method under deep water level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209387A true CN109209387A (en) | 2019-01-15 |
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ID=64984079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811079362.9A Pending CN109209387A (en) | 2018-09-17 | 2018-09-17 | Concrete grout cover construction method under deep water level |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473322A (en) * | 1979-05-07 | 1984-09-25 | Echols H Vance | Method and system for lining shafts |
| JPS62153488A (en) * | 1985-12-24 | 1987-07-08 | 株式会社竹中工務店 | Construction of underground vertical cylindrical structure |
| CN1225974A (en) * | 1998-02-09 | 1999-08-18 | 山东矿业学院 | Technology for quickly resuming normal construction after wellhole submerged by sudden water |
| CN102536247A (en) * | 2010-12-30 | 2012-07-04 | 中国华冶科工集团有限公司 | Construction method of still-water cement grout pad |
| CN108868776A (en) * | 2018-07-06 | 2018-11-23 | 中钢集团马鞍山矿山研究院有限公司 | The high pressure-bearing broken rock of deep-well induces pre-pouring grout reinforcement means in advance |
-
2018
- 2018-09-17 CN CN201811079362.9A patent/CN109209387A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473322A (en) * | 1979-05-07 | 1984-09-25 | Echols H Vance | Method and system for lining shafts |
| JPS62153488A (en) * | 1985-12-24 | 1987-07-08 | 株式会社竹中工務店 | Construction of underground vertical cylindrical structure |
| CN1225974A (en) * | 1998-02-09 | 1999-08-18 | 山东矿业学院 | Technology for quickly resuming normal construction after wellhole submerged by sudden water |
| CN102536247A (en) * | 2010-12-30 | 2012-07-04 | 中国华冶科工集团有限公司 | Construction method of still-water cement grout pad |
| CN108868776A (en) * | 2018-07-06 | 2018-11-23 | 中钢集团马鞍山矿山研究院有限公司 | The high pressure-bearing broken rock of deep-well induces pre-pouring grout reinforcement means in advance |
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Application publication date: 20190115 |