CN107762533A - A kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel - Google Patents

A kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel Download PDF

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Publication number
CN107762533A
CN107762533A CN201710971986.0A CN201710971986A CN107762533A CN 107762533 A CN107762533 A CN 107762533A CN 201710971986 A CN201710971986 A CN 201710971986A CN 107762533 A CN107762533 A CN 107762533A
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China
Prior art keywords
grouting
tunnel
water
osculum
curtain
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CN201710971986.0A
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Chinese (zh)
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CN107762533B (en
Inventor
李献民
刘拥华
薛君
吕志强
王贺起
黄明利
王润泽
井维秋
吴景利
Original Assignee
中交公局桥隧工程有限公司
中交一公局桥隧工程有限公司
中交第公路工程局有限公司
中交第一公路工程局有限公司
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Priority to CN201710971986.0A priority Critical patent/CN107762533B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage
    • E21F16/02Drainage of tunnels

Abstract

The invention discloses a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel, including osculum, lower section, face, sealing batholite, wall for grouting, upper section, injected hole of upper stage, tunnel, pre-grouting area, grouting curtain stabilization zone and next stage slip casting area.The beneficial effects of the invention are as follows:Of the invention this is reinforced using the method for upper stifled lower drain water slip casting is in front of tunnel heading country rock, injected hole is set to carry out tunneling boring curtain-grouting in upper section, in lower section, osculum is set, front of tunnel heading country rock hydraulic pressure is reduced by osculum, blocked up in row, it is uniform, closely knit to reach slip casting, reinforce the effect of weak surrounding rock, solve in high-pressure water-enriched country rock the problem of hydraulic pressure is high, grouting difficulty, advantageously reduce mortar depositing construction cost.

Description

A kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel

Technical field

The present invention relates to a kind of front pre-grouting method in tunnel, specially a kind of high-pressure water-enriched weak surrounding rock mountain tunnel Front pre-grouting method, belong to Application in Building technical field.

Background technology

Tunnel is construction project key project, and some constructing tunnel areas need to pass through water-rich fault zone, fracture belt position rock Body crushes, developmental joint fissure, and tax water condition is preferable, and edpth of tunnel is big, and water pressure is high, because fracture location rock mass is relatively more broken Broken, construction period easily caves in and gushing water, the construction disaster such as mud of dashing forward.The Treatment Methods of Tunnel Gushing are based on " row " at present, Current most of tunnel uses the scheme based on row to big flow water process measure, the tunnel built based on " row ", though So solve the problem in many tunnels, but also leave hidden danger in some tunnels:Make tunnel that it is big to have drawn surrounding into drain cavern The underground water of amount, thus the loss of underground water is caused, a series of problem is generated, such as influences liner structure and traffic safety, Engineering area water-bearing layer is caused in terms of environment to make deterioration of the ecological environment etc. by drainage.

There is prominent water burst situation when building, during active fault in some current tunnels, when water yield is high, are handling After Tunnel Gushing, take which kind of measure to reinforce front of tunnel heading weak surrounding rock and ensure that tunnel safety construction is critical problem, it is right High hydraulic pressure, the weak surrounding rock of big yield advanced pre-reinforcement carried out using tunneling boring curtain-grouting, it is necessary to grouting pressure it is big, slip casting When be likely to occur slip casting blind area, reduce slip casting effect.

The content of the invention

It is an object of the invention to provide a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel, pass through Blocked up in row, the hydraulic pressure of front of tunnel heading country rock is reduced by lower section osculum, to reach more preferable slip casting effect.

To achieve the above object, a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel, including tunnel, The inside in the tunnel is provided with face, and pours wall for grouting in the side wall of the face;The face be provided with upper section, Lower section, the upper section is provided with injected hole of upper stage and carries out tunneling boring curtain-grouting, and the lower section is provided with osculum Reduce front of tunnel heading country rock hydraulic pressure;The side wall of the face is provided with sealing batholite;Slip casting is poured in the one end in the tunnel Curtain reinforcement area, the inside in the tunnel is provided with pre-grouting area, and the one end in the pre-grouting area is provided with next stage slip casting Area;

Its step is as follows:

Step 1:Advance geologic prediction is carried out, detects the front of tunnel heading fault belt, underground water position;

Step 2:Apart from water-rich fault zone one end apart from when, stop excavation construction, pour the wall for grouting, it is described only Wall thickness empirically value is starched, it is relevant with the curtain-grouting back-up coat thickness;

Step 3:After pouring the wall for grouting, advance boreholes are carried out, according to drilling water yield actual measurement hydraulic pressure, in water Lower drain water slip casting is blocked up in the case that pressure is very high, in selection;

Step 4:In the lower section borehole of the face, the osculum is set, the draining hole number according to Survey water to set, the underground water of discharge is drained by tunnel cavern drainage groove;

Step 5:In strict accordance with front pre-grouting design the face it is described on section lay it is described on rank Section injected hole, using protrusive segmenting slip casting, grouting sequence:" inner ring behind first outer ring, with collar aperture interval jump hole ";

Step 6:After the completion of the pre-grouting layer, with reference to advanced tubal curtain pre-reinforcement measure, implement to excavate, according to country rock Characteristic selects benching tunnelling method or full-face excavation, excavates to reserved paragraph as the described of the pre-grouting layer of next stage Sealing batholite, start next stage advanced curtain-grouting.

Preferably, in order to reduce the front of tunnel heading country rock hydraulic pressure.The osculum equidistantly divides on the lower section Cloth.

Preferably, in order to reinforce the front of tunnel heading country rock, the pre-grouting area is located at the front of the face.

The beneficial effects of the invention are as follows:Of the invention this is reinforced before face using the method for upper stifled lower drain water slip casting Square country rock, injected hole is set to carry out tunneling boring curtain-grouting in upper section, but because hydraulic pressure is high in high-pressure water-enriched country rock, only Grouting pressure is improved, may result in that slip casting effect is poor, slip casting blind area occurs, therefore in lower section setting osculum, passes through row Water hole reduces front of tunnel heading country rock hydraulic pressure, is blocked up in row, slip casting is uniform, closely knit to reach, and reinforces the effect of weak surrounding rock.This Invention is solved in high-pressure water-enriched country rock the problem of hydraulic pressure is high, grouting difficulty, is advantageous to using upper stifled lower drain water grouting method Reduce mortar depositing construction cost.

Brief description of the drawings

Fig. 1 is upper stifled lower drain water slip casting vertical section schematic diagram;

Fig. 2 is upper stifled lower drain water slip casting schematic cross-sectional view.

In figure:1st, osculum, 2, lower section, 3, face, 4, sealing batholite, 5, wall for grouting, 6, upper section, 7, the upper stage Injected hole, 8, tunnel, 9, pre-grouting area, 10, grouting curtain stabilization zone, 11, next stage slip casting area.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

Refer to shown in Fig. 1-2, a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel, including tunnel 8, the inside in the tunnel 8 is provided with face 3, and wall for grouting 5 is poured in the side wall of the face 3;The face 3 is provided with Upper section 6, lower section 2, the upper section 6 are provided with injected hole of upper stage 7 and carry out tunneling boring curtain-grouting, and the lower section 2 The front country rock hydraulic pressure of face 3 is reduced provided with osculum 1;The side wall of the face 3 is provided with sealing batholite 4;The tunnel Grouting curtain stabilization zone 10 is poured in the one end in road 8, and the inside in the tunnel 8 is provided with pre-grouting area 9, and the pre-grouting area 9 one end is provided with next stage slip casting area 11;

Step is as follows:

Step 1:Advance geologic prediction is carried out, detects the front fault belt of face 3, underground water position;

Step 2:Apart from water-rich fault zone one end apart from when, stop excavation construction, pour the wall for grouting 5, it is described only The thickness of wall 5 empirically value is starched, it is relevant with the thickness of curtain-grouting back-up coat 10;

Step 3:After pouring the wall for grouting 5, advance boreholes are carried out, according to drilling water yield actual measurement hydraulic pressure, in water Lower drain water slip casting is blocked up in the case that pressure is very high, in selection;

Step 4:In the lower drilling of section 2 of the face 3, the osculum 1, the quantity of osculum 1 are set Set according to actual measurement water, the underground water of discharge is drained by tunnel cavern drainage groove;

Step 5:In strict accordance with front pre-grouting design the face 3 it is described on section 6 lay on described Stage injected hole 7, using protrusive segmenting slip casting, grouting sequence:" inner ring behind first outer ring, with collar aperture interval jump hole ";

Step 6:After the completion of the pre-grouting layer 9, with reference to advanced tubal curtain pre-reinforcement measure, implement to excavate, according to country rock Characteristic selects benching tunnelling method or full-face excavation, excavates to reserved institute of the paragraph as the pre-grouting layer 9 of next stage Sealing batholite 4 is stated, starts next stage advanced curtain-grouting.

As a kind of technical optimization scheme of the present invention, the osculum 1 is equally spaced on the lower section 2.

As a kind of technical optimization scheme of the present invention, the pre-grouting area 9 is located at the front of the face 3.

In the use of the present invention, advance geologic prediction is first carried out, detection face 3 front fault belt, level of ground water Put;Apart from water-rich fault zone one end apart from when, stop excavation construction, pour wall for grouting 5, the thickness of wall for grouting 5 empirically value, It is relevant with the thickness of curtain-grouting back-up coat 10.After pouring wall for grouting 5, advance boreholes are carried out, according to drilling water yield actual measurement Hydraulic pressure, lower drain water slip casting is blocked up in the case where hydraulic pressure is very high, in selection.Draining is set in the drilling of lower section 2 of face 3 again Hole 1, the quantity of osculum 1 are set according to actual measurement water, and the underground water of discharge is drained by tunnel cavern drainage groove.

In work progress, the slip casting of upper stage is laid in strict accordance with upper section 6 of the front pre-grouting design in face 3 Hole 7, using protrusive segmenting slip casting, grouting sequence:" inner ring behind first outer ring, with collar aperture interval jump hole ".Pre-grouting layer 9 is completed Afterwards, with reference to advanced tubal curtain pre-reinforcement measure, implement to excavate, benching tunnelling method or full-face excavation are selected according to characteristics of surrounding rock, opened Sealing batholite 4 of the reserved paragraph as the pre-grouting layer 9 of next stage is dug, starts next stage advanced curtain-grouting.

It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (3)

1. a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel, including tunnel (8), it is characterised in that:Institute The inside for stating tunnel (8) is provided with face (3), and wall for grouting (5) is poured in the side wall of the face (3);The face (3) upper section (6), lower section (2) are provided with, the upper section (6) is provided with injected hole of upper stage (7) and carries out tunneling boring curtain note Slurry, and the lower section (2) is provided with osculum (1) to reduce country rock hydraulic pressure in front of face (3);The side of the face (3) Wall is provided with sealing batholite (4);Grouting curtain stabilization zone (10) are poured in one end of the tunnel (8), the inside of the tunnel (8) Provided with pre-grouting area (9), and the one end in the pre-grouting area (9) is provided with next stage slip casting area (11);
Its step is as follows:
Step 1:Advance geologic prediction is carried out, detects fault belt, underground water position in front of the face (3);
Step 2:Apart from water-rich fault zone one end apart from when, stop excavation construction, pour the wall for grouting (5), it is described only to starch Wall (5) thickness empirically value, it is relevant with curtain-grouting back-up coat (10) thickness;
Step 3:After pouring the wall for grouting (5), advance boreholes are carried out, according to drilling water yield actual measurement hydraulic pressure, in hydraulic pressure Lower drain water slip casting is blocked up in the case of very high, in selection;
Step 4:In lower section (2) drilling of the face (3), the osculum (1), the osculum (1) are set Quantity is set according to actual measurement water, and the underground water of discharge is drained by tunnel cavern drainage groove;
Step 5:Laid in strict accordance with the upper section (6) of the front pre-grouting design in the face (3) on described Stage injected hole (7), using protrusive segmenting slip casting, grouting sequence:" inner ring behind first outer ring, with collar aperture interval jump hole ";
Step 6:After the completion of the pre-grouting layer (9), with reference to advanced tubal curtain pre-reinforcement measure, implement to excavate, it is special according to country rock Sexual behavior mode benching tunnelling method or full-face excavation, excavate to reserved institute of the paragraph as the pre-grouting layer (9) of next stage Sealing batholite (4) is stated, starts next stage advanced curtain-grouting.
2. a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel according to claim 1, its feature It is:The osculum (1) is equally spaced on the lower section (2).
3. a kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel according to claim 1, its feature It is:The pre-grouting area (9) is located at the front of the face (3).
CN201710971986.0A 2017-10-18 2017-10-18 A kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel CN107762533B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109519220A (en) * 2018-10-29 2019-03-26 中铁十二局集团有限公司 Karst area diversion tunnel is crushed rich water section grouting treatment method
CN110439579A (en) * 2019-09-17 2019-11-12 中国水利水电第四工程局有限公司 A kind of open type TBM rich water tunnel front pre-grouting method
CN110924976A (en) * 2019-12-03 2020-03-27 中南大学 Surrounding rock outer ring grouting reinforcement method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101798930A (en) * 2010-03-24 2010-08-11 中铁十二局集团有限公司 Rapid construction method of high-pressure water-rich fault zone of tunnel
CN101994513A (en) * 2010-10-30 2011-03-30 中铁十二局集团第二工程有限公司 Method for constructing tunnel by finishing full section curtain grouting from upper-half section
CN102493822A (en) * 2011-12-29 2012-06-13 中铁二十三局集团有限公司 Method for performing curtain grouting construction on tunnel by water rich fault influence zone
CN102787846A (en) * 2012-07-31 2012-11-21 中铁隧道集团有限公司 Upper-blocking and lower-draining construction method for undersea tunnel fault fracture zone
CN106049418A (en) * 2016-06-22 2016-10-26 中铁二局集团有限公司 Combined grouting reinforcement method for tunnel surface in shallow buried traversing faultage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101798930A (en) * 2010-03-24 2010-08-11 中铁十二局集团有限公司 Rapid construction method of high-pressure water-rich fault zone of tunnel
CN101994513A (en) * 2010-10-30 2011-03-30 中铁十二局集团第二工程有限公司 Method for constructing tunnel by finishing full section curtain grouting from upper-half section
CN102493822A (en) * 2011-12-29 2012-06-13 中铁二十三局集团有限公司 Method for performing curtain grouting construction on tunnel by water rich fault influence zone
CN102787846A (en) * 2012-07-31 2012-11-21 中铁隧道集团有限公司 Upper-blocking and lower-draining construction method for undersea tunnel fault fracture zone
CN106049418A (en) * 2016-06-22 2016-10-26 中铁二局集团有限公司 Combined grouting reinforcement method for tunnel surface in shallow buried traversing faultage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109519220A (en) * 2018-10-29 2019-03-26 中铁十二局集团有限公司 Karst area diversion tunnel is crushed rich water section grouting treatment method
CN110439579A (en) * 2019-09-17 2019-11-12 中国水利水电第四工程局有限公司 A kind of open type TBM rich water tunnel front pre-grouting method
CN110439579B (en) * 2019-09-17 2020-11-24 中国水利水电第四工程局有限公司 Advanced pre-grouting method for open-type TBM (tunnel boring machine) water-rich tunnel
CN110924976A (en) * 2019-12-03 2020-03-27 中南大学 Surrounding rock outer ring grouting reinforcement method
CN110924976B (en) * 2019-12-03 2020-09-18 中南大学 Surrounding rock outer ring grouting reinforcement method

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