CN103866780A - Construction method for rapidly conducting impervious curtain grouting in karst pipeline leakage area - Google Patents

Construction method for rapidly conducting impervious curtain grouting in karst pipeline leakage area Download PDF

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Publication number
CN103866780A
CN103866780A CN201410123007.2A CN201410123007A CN103866780A CN 103866780 A CN103866780 A CN 103866780A CN 201410123007 A CN201410123007 A CN 201410123007A CN 103866780 A CN103866780 A CN 103866780A
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hole
grouting
grout
exploration
aggregate
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CN201410123007.2A
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Chinese (zh)
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CN103866780B (en
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张庆
谢豪
周先练
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中国水电顾问集团贵阳勘测设计研究院有限公司
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Abstract

The invention discloses a construction method for rapidly conducting impervious curtain grouting in a karst pipeline leakage area. The method comprises the following steps of arranging conventional grouting holes, arranging encrypting holes, arranging detection holes, expanding holes, pouring aggregate and conducting grouting. According to the method, the type of the grouting area is judged firstly according to the conventional grouting holes, then the encrypting holes and the detection holes are respectively formed, so that the upstream direction and the downstream direction of a karst pipeline and the distribution range on the grouting axis are judged, and due to the fact that the aperture of the grouting holes is adjusted, backfilling is carried out on the dry aggregate , and in the pouring process, cement mortar is intermittently poured so that the effect of forming a curtain grouting curtain body can be achieved. Compared with a traditional curtain grouting method, the method has the advantages of being few in consumable material, small in work amount and short in work hour, the construction quality and the construction progress can be greatly improved, and the engineering investment can be effectively controlled.

Description

A kind of construction method of carrying out quick seepage preventing curtain grouting in karst blowby area

Technical field

The present invention relates to Hydraulic and Hydro-Power Engineering technical field, be specifically related to a kind of construction method of carrying out quick seepage preventing curtain grouting in karst blowby area.

Background technology

In Hydraulic and Hydro-Power Engineering for reduce structure foundation seepage discharge, reduce osmotic pressure, ensure the seepage stability of ground, conventionally need to carry out curtain grouting.And the abundant area of waterpower resourses, mostly in lime karst area, wants successfully exploitation waterpower resourses, primary condition is to resolve seepage preventing curtain grouting.The essence of karst region curtain grouting is utilized the various joint fissures of slurries filling, hole, hole and Cave exactly, form the continuous curtain that blocks water, thereby play fixed, bonding, antiseepage, improve the effect of bearing strength and non-deformability and transmission stress etc.

And the area of growing for karst, underground karst cavity is larger, and rock permeability is affected by karst, tomography, crack etc., and because the uneven distribution in karst, tomography, crack shows the inhomogeneity of water permeability, antiseepage condition is comparatively complicated.If adopt conventional seepage preventing curtain grouting means, it is cement injection mortar, because cement mortar mobility is larger, so how a lot of the meeting compared to other landform of grouting amount is, must after solidifying a period of time, pour into again in order to reduce grouting amount, therefore engineering quantity is very large, and need expend the long period simultaneously again, have a strong impact on construction quality and construction speed, and greatly increase construction investment.

At present, the mechanism of karst region curtain grouting mainly comprises Permeation grouting, densification grouting and fracture grouting, shows that slurries spread, flow in crack, the process of filling, densification and reinforcement and strengthening.The construction of karst area curtain grouting adopts that small-bore diamond bit creeps into, circulate in aperture sealing, hole, do not rinse, solidifying high pressure cement grout method needless to say.Present research thinks, grouting pressure is larger, and range ability (being filling scope) will be larger in certain crack or pore system for slurries.But the pressure using is excessive, will make slurry stream string to unwanted place, cause waste, in addition, high pressure easily makes rock mass wreck, and affects the building on it.

Obviously, existing Curtain Grouting Construction method is not also suitable for karst region, need to provide a kind of new curtain grouting method to solve the problems referred to above.

Summary of the invention

The object of the invention is to: a kind of construction method of carrying out quick seepage preventing curtain grouting in karst blowby area is provided, and existing cost is high when solving in prior art that curtain grouting is carried out in karst area, engineering quantity is large, length consuming time and construction quality and the poor problem of progress.

The present invention is achieved by following technical solution:

A construction method of carrying out quick seepage preventing curtain grouting in karst blowby area, the method comprises the following steps:

1) arrange conventional grout hole: the center local that carries out curtain grouting at need is determined curtain grouting axis, get out three intervals along curtain grouting axis and arrange grout hole A1, grout hole A2 and grout hole A3, by the variation judging area type of boring and filling process;

2) arrange and encrypt hole: on curtain grouting axis, offer and encrypt hole a1 and encrypt hole a2, encrypt hole a1 and be arranged between grout hole A1 and grout hole A2, encrypt hole a2 and be arranged between grout hole A2 and grout hole A3;

3) arrange exploration hole: set up respectively row's exploration hole B and row's exploration hole C in the upper and lower both sides of curtain grouting axis, every row's exploration hole all has four;

4) reaming: respectively to grout hole A1, grout hole A2 and grout hole A3, exploration hole B and exploration hole C carry out reaming;

5) aggregate perfusion: respectively to grout hole A1, grout hole A2 and grout hole A3, pour into dry aggregate in exploration hole B and exploration hole C;

6) grouting: after aggregate has poured into, more intermittent cement injection mortar fills the space between aggregate.

Described exploration hole B and exploration hole C are inclined hole, and arrange towards be taking vertical direction as benchmark outward-dipping.

The angle of described exploration hole B and exploration hole C and vertical direction is 5-10 °.

The dry aggregate pouring in described step 5) is middle stone aggregate: the aggregate of gravelstone aggregate=1:1.

The original aperture of described grout hole A1, grout hole A2, grout hole A3, encryption hole a1, encryption hole a2, exploration hole B and exploration hole C is 75mm.

In described step 4), after reaming, aperture, each hole is 150mm.

The invention has the beneficial effects as follows:

Compared with prior art, construction method of carrying out quick seepage preventing curtain grouting in karst blowby area provided by the invention, first judge the type in grouting region by conventional grout hole, then offer respectively encryption hole and exploration hole and judge the distribution on karst upstream and downstream direction and grouting axis, then by adjusting the pore size of grout hole, the dry aggregate of backfill, and at the cement injection mortar of filling process discontinuous, to reach the effect that forms curtain grouting curtain body, it is few that the method has consumptive material compared to traditional curtain grouting method, engineering quantity is little, the advantage that man-hour is short, can significantly improve construction quality and construction speed, effectively Control Engineering investment.

Brief description of the drawings

Fig. 1 is curtain grouting layout plan in the present invention;

Fig. 2 is I-I sectional view in Fig. 1;

Fig. 3 is II-II sectional view in Fig. 1;

Detailed description of the invention

Below in conjunction with drawings and Examples, technical scheme of the present invention is described further, but described in desired protection domain is not limited to;

Embodiment 1:

First carry out the boring of conventional grout hole A1, grout hole A2 and grout hole A3, aperture is 75mm, if when boring is hung brill, bit freezing, without returning in water and filling process, grout consumption is large, the phenomenons such as pressure of be in the milk not rise can tentatively infer that one's respective area is the location of karst growth; Then arrange and encrypt hole a1 and encrypt hole a2 according to former design pitch-row, aperture is 75mm, set up respectively four one rows' exploration hole B(b1, b2, b3 and b4 in the upper and lower both sides of curtain grouting axis) and row's exploration hole C(c1, c2, c3 and c4), aperture is similarly 75mm and exploration hole B and exploration hole C and is the inclined hole of 5 °, arrange towards be taking vertical direction as benchmark outward-dipping, Main Function is the distribution on Detection of Karst pipeline upstream and downstream direction and grouting axis, according to the implementation result of exploration hole, then determine grouting implementation method; If the karst of grout hole periphery is distributed in while being as shown in Figure 1,2 and 3 state in the coverage of exploration hole B and exploration hole C, grout hole A1 to original aperture 75mm, grout hole A2 and grout hole A3 respectively, exploration hole B and exploration hole C carry out reaming to 150mm, stone aggregate in perfusion in hole: the dry aggregate of two gratings of gravelstone aggregate=1:1, due to perfusion is dry aggregate, between its aggregate, frictional resistance is larger, therefore its diffusion radius is less, therefore can reduce the number of dropouts of aggregate; After injecting aggregate completes, more intermittent cement injection mortar is to fill the space between aggregate.

Embodiment 2:

First carry out the boring of conventional grout hole A1, grout hole A2 and grout hole A3, aperture is 75mm, if when boring is hung brill, bit freezing, without returning in water and filling process, grout consumption is large, the phenomenons such as pressure of be in the milk not rise can tentatively infer that one's respective area is the location of karst growth; Then locate to arrange and encrypt hole a1 and encrypt hole a2 according to former design pitch-row, aperture is 75mm, set up respectively four one rows' exploration hole B(b1, b2, b3 and b4 in the upper and lower both sides of curtain grouting axis) and row's exploration hole C(c1, c2, c3 and c4), aperture is similarly 75mm and exploration hole B and exploration hole C and is the inclined hole of 7 °, arrange towards be taking vertical direction as benchmark outward-dipping, Main Function is the distribution on Detection of Karst pipeline upstream and downstream direction and grouting axis, according to the implementation result of exploration hole, then determine grouting implementation method; If the karst of grout hole periphery is distributed in while being as shown in Figure 1,2 and 3 state in the coverage of exploration hole B and exploration hole C, grout hole A1 to original aperture 75mm, grout hole A2 and grout hole A3 respectively, exploration hole B and exploration hole C carry out reaming to 150mm, stone aggregate in perfusion in hole: the dry aggregate of two gratings of gravelstone aggregate=1:1, due to perfusion is dry aggregate, between its aggregate, frictional resistance is larger, therefore its diffusion radius is less, therefore can reduce the number of dropouts of aggregate; After injecting aggregate completes, more intermittent cement injection mortar is to fill the space between aggregate.

Embodiment 3:

First carry out the boring of conventional grout hole A1, grout hole A2 and grout hole A3, aperture is 75mm, if when boring is hung brill, bit freezing, without returning in water and filling process, grout consumption is large, the phenomenons such as pressure of be in the milk not rise can tentatively infer that one's respective area is the location of karst growth; Then locate to arrange and encrypt hole a1 and encrypt hole a2 according to former design pitch-row, aperture is 75mm, set up respectively four one rows' exploration hole B(b1, b2, b3 and b4 in the upper and lower both sides of curtain grouting axis) and row's exploration hole C(c1, c2, c3 and c4), aperture is similarly 75mm and exploration hole B and exploration hole C and is the inclined hole of 10 °, arrange towards be taking vertical direction as benchmark outward-dipping, Main Function is the distribution on Detection of Karst pipeline upstream and downstream direction and grouting axis, according to the implementation result of exploration hole, then determine grouting implementation method; If the karst of grout hole periphery is distributed in while being as shown in Figure 1,2 and 3 state in the coverage of exploration hole B and exploration hole C, grout hole A1 to original aperture 75mm, grout hole A2 and grout hole A3 respectively, exploration hole B and exploration hole C carry out reaming to 150mm, stone aggregate in perfusion in hole: the dry aggregate of two gratings of gravelstone aggregate=1:1, due to perfusion is dry aggregate, between its aggregate, frictional resistance is larger, therefore its diffusion radius is less, therefore can reduce the number of dropouts of aggregate; After injecting aggregate completes, more intermittent cement injection mortar is to fill the space between aggregate.

From above-mentioned 3 embodiment, owing to need not waiting to coagulate between flush phase, therefore perfusion effect is able to obvious lifting, and the time that forms curtain grouting curtain body can shorten greatly, and then significantly reduced consumptive material and engineering is consuming time, and improve construction quality and construction speed, be convenient to effective Control Engineering investment.

Claims (6)

1. a construction method of carrying out quick seepage preventing curtain grouting in karst blowby area, is characterized in that: the method comprises the following steps:
1) arrange conventional grout hole: the center local that carries out curtain grouting at need is determined curtain grouting axis, get out three intervals along curtain grouting axis and arrange grout hole A1, grout hole A2 and grout hole A3, by the variation judging area type of boring and filling process;
2) arrange and encrypt hole: on curtain grouting axis, offer and encrypt hole a1 and encrypt hole a2, encrypt hole a1 and be arranged between grout hole A1 and grout hole A2, encrypt hole a2 and be arranged between grout hole A2 and grout hole A3;
3) arrange exploration hole: set up respectively row's exploration hole B and row's exploration hole C in the upper and lower both sides of curtain grouting axis, every row's exploration hole all has four;
4) reaming: respectively to grout hole A1, grout hole A2 and grout hole A3, exploration hole B and exploration hole C carry out reaming;
5) aggregate perfusion: respectively to grout hole A1, grout hole A2 and grout hole A3, pour into dry aggregate in exploration hole B and exploration hole C;
6) grouting: after aggregate has poured into, more intermittent cement injection mortar fills the space between aggregate.
2. construction method of carrying out quick seepage preventing curtain grouting in karst blowby area according to claim 1, is characterized in that: described exploration hole B and exploration hole C are inclined hole, and arrange towards be taking vertical direction as benchmark outward-dipping.
3. construction method of carrying out quick seepage preventing curtain grouting in karst blowby area according to claim 2, is characterized in that: the angle of described exploration hole B and exploration hole C and vertical direction is 5-10 °.
4. construction method of carrying out quick seepage preventing curtain grouting in karst blowby area according to claim 1, is characterized in that: the dry aggregate pouring in described step 5) is middle stone aggregate: the aggregate of gravelstone aggregate=1:1.
5. construction method of carrying out quick seepage preventing curtain grouting in karst blowby area according to claim 1, is characterized in that: the original aperture of described grout hole A1, grout hole A2, grout hole A3, encryption hole a1, encryption hole a2, exploration hole B and exploration hole C is 75mm.
6. construction method of carrying out quick seepage preventing curtain grouting in karst blowby area according to claim 1, is characterized in that: in described step 4), after reaming, aperture, each hole is 150mm.
CN201410123007.2A 2014-03-28 2014-03-28 A kind of construction method of carrying out quick seepage preventing curtain grouting in karst blowby area CN103866780B (en)

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CN104532866A (en) * 2014-12-10 2015-04-22 中国水利水电第五工程局有限公司 Lap joint curtain hole site laying device and method
CN105201001A (en) * 2015-10-10 2015-12-30 中国电建集团贵阳勘测设计研究院有限公司 Composite seepage preventing structure for large karst cave in karst region and construction method thereof
CN105887886A (en) * 2016-06-16 2016-08-24 中国水利水电第十工程局有限公司 Strong karst development stratum curtain grouting construction method
CN107387116A (en) * 2017-09-11 2017-11-24 中国矿业大学 A kind of latent shale filling karst of tunnel floor, which changes, fills out Treatment Methods
CN109610412A (en) * 2018-11-29 2019-04-12 云南省红河州水利水电勘察设计研究院 A kind of karst area underground underground river plugging structure and method for blocking
CN110056203A (en) * 2019-03-26 2019-07-26 周伟 A kind of processing method of ground structure leak

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN104532866A (en) * 2014-12-10 2015-04-22 中国水利水电第五工程局有限公司 Lap joint curtain hole site laying device and method
CN104532866B (en) * 2014-12-10 2016-04-06 中国水利水电第五工程局有限公司 A kind of overlap joint curtain hole position installation aiding device and method
CN105201001A (en) * 2015-10-10 2015-12-30 中国电建集团贵阳勘测设计研究院有限公司 Composite seepage preventing structure for large karst cave in karst region and construction method thereof
CN105887886A (en) * 2016-06-16 2016-08-24 中国水利水电第十工程局有限公司 Strong karst development stratum curtain grouting construction method
CN105887886B (en) * 2016-06-16 2018-02-27 中国水利水电第十一工程局有限公司 A kind of strong karsts developing area stratum Curtain Grouting Construction method
CN107387116A (en) * 2017-09-11 2017-11-24 中国矿业大学 A kind of latent shale filling karst of tunnel floor, which changes, fills out Treatment Methods
CN109610412A (en) * 2018-11-29 2019-04-12 云南省红河州水利水电勘察设计研究院 A kind of karst area underground underground river plugging structure and method for blocking
CN109610412B (en) * 2018-11-29 2020-12-04 云南省红河州水利水电勘察设计研究院 Blocking structure and blocking method for underground river in karst area
CN110056203A (en) * 2019-03-26 2019-07-26 周伟 A kind of processing method of ground structure leak

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