CN204253056U - A kind of shield machine export & import reinforcing structure - Google Patents

A kind of shield machine export & import reinforcing structure Download PDF

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Publication number
CN204253056U
CN204253056U CN201420695776.5U CN201420695776U CN204253056U CN 204253056 U CN204253056 U CN 204253056U CN 201420695776 U CN201420695776 U CN 201420695776U CN 204253056 U CN204253056 U CN 204253056U
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China
Prior art keywords
shield machine
lining cutting
import
reinforcing
export
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CN201420695776.5U
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Chinese (zh)
Inventor
杨积凯
张春森
吴小维
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北京首尔工程技术有限公司
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Priority to CN201420695776.5U priority Critical patent/CN204253056U/en
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Publication of CN204253056U publication Critical patent/CN204253056U/en

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Abstract

The utility model belongs to constructing tunnel field, relate to a kind of shield machine export & import reinforcing structure, comprise: in the soil body at shield machine export & import hole place, pre-lining cutting arc concrete sheet is arranged along shield machine outline line hoop, all pre-lining cutting arc concrete sheet compact siro spinning technology together, form pre-lining cutting circular tube structure.Structure described in the utility model solves the reinforcing problem at shield machine export & import hole, ensure that the shield machine discrepancy safety in hole and normally carrying out of constructing tunnel, is beneficial to shield machine simultaneously and enters next construction link smoothly, improve constructing tunnel work efficiency; In addition, this structure construction operation is easy, and economic security, easily implements.

Description

A kind of shield machine export & import reinforcing structure

Technical field

The utility model belongs to the construction field, the particularly ruggedized construction at a kind of shield machine export & import hole place that shield machine builds tunnel.

Background technology

Shield structure export & import operation is the critical process that shield method builds tunnel, and the quality of this operation construction technology will directly have influence on the success or failure of shield structure engineering construction.

Therefore, in order to ensure safe construction during shield structure export & import, preventing the portal soil body from pouring in vertical shaft, preventing gushing water around hole, when gushing sand and shield structure export & import on lift or sink, must reinforce hole body.Shield structure export & import reinforcement means the most frequently used at present has high-pressure rotary spraying method and freezing process.When stratum is poor, as in China's southeast many employings freezing process, its difficulty of construction and construction cost high, long in time limit; On some stratum, place generally adopts high-pressure rotary spraying method relatively preferably, and use during this method and need to carry out grouting and reinforcing from earth's surface to deep bottom, require that there are the execution conditions of reinforcing on earth's surface, when edpth of tunnel is larger, churning method can lose efficacy.

Utility model content

The purpose of this utility model is: provide a kind of and can reinforce hole or face before shield machine export & import, ensure that shield machine is come in and gone out the shield machine export & import reinforcing structure of hole safety, with solve traditional reinforcing structural soundness poor, easily lost efficacy, problem that reinforcement cost is high.

The concrete technical scheme of dealing with problems is: provide a kind of novel shield machine export & import reinforcing structure, it is characterized in that: in the soil body at shield machine export & import hole place, pre-lining cutting arc concrete sheet is arranged along shield machine outline line hoop, all pre-lining cutting arc concrete sheet compact siro spinning technology together, form a closed pre-lining cutting circular tube structure.

Described pre-lining cutting arc concrete sheet adopts concrete form.

The inner edge line of described pre-lining cutting circular tube structure can overlap with shield machine outline line, or be positioned at shield machine outline line inner side, be 0 ~ 30mm with the distance of shield machine outline line.

Described pre-lining cutting arc concrete sheet physical dimension can be: width 1 ~ 2.5m, thickness 0.4 ~ 0.8m, length 6 ~ 15m.

In the soil body within the scope of hole surrounding soil outside described pre-lining cutting circular tube structure and the face of inner side, horizontal jet grouting injection can be added and the ruggedized construction formed.

Horizontal jet grouting injection ruggedized construction in hole surrounding soil outside described pre-lining cutting circular tube structure is horizontal jet grouting stub, and close proximity between horizontal jet grouting stub, defines horizontal jet grouting wall for grouting.

Long 2 ~ the 5m of described horizontal jet grouting stub, diameter is 0.6 ~ 1.5m.

Horizontal jet grouting injection ruggedized construction in the soil body within the scope of face inside described pre-lining cutting circular tube structure can be horizontal rotary jet strengthening stake.

The length of described horizontal rotary jet strengthening stake can be identical with the length of pre-lining cutting arc concrete sheet, and the diameter of horizontal rotary jet strengthening stake can be 0.6 ~ 1.5m.

Compared with prior art, the utility model has following beneficial effect: pre-lining cutting circular tube structure described in the utility model, solve the reinforcing problem at shield machine export & import hole, ensure that the shield machine discrepancy safety in hole and normally carrying out of constructing tunnel, be conducive to shield machine simultaneously and proceed to next construction link smoothly, improve constructing tunnel work efficiency; In addition, this structure construction operation is easy, and economic security is easy to implement.

Pre-lining cutting circular tube structure described in the utility model, both the cost that hole body is reinforced had been decreased, good consolidation effect can be realized again, especially formation disturbance that the pre-lining cutting in tunnel has is taken full advantage of small and the advantage of hoop 360 ° pre-liner supporting arch shell can be formed rapidly at shield machine outline, stabilized structure, and stopped seepy question.

The utility model forms 360 ° of pre-lining arches (i.e. pre-lining cutting circular tube structure) by the pre-lining methods in tunnel at shield machine outline, thus carries out supporting to the shield machine outline soil body; In addition, also can according to field geology situation and requirement of engineering, pre-lining cutting circular tube structure and other tunnel structures are carried out combine (other structures are carried out auxiliary to the pre-lining methods in tunnel or are combined with it), thus further hole body is reinforced, ensure the safety of hole body stability and shield machine export & import.

Accompanying drawing explanation

Fig. 1 is the positive elevational schematic view of reinforcing structure.

Fig. 2 is the schematic diagram of A-A section in Fig. 1.

Fig. 3 is horizontal jet grouting schematic flow sheet.

Fig. 4 is the pre-lining construction schematic flow sheet in tunnel.

In figure, 1-pre-lining cutting arc concrete sheet; 2-hole surrounding soil; The stake of 3-horizontal rotary jet strengthening; 4-horizontal jet grouting stub; The soil body within the scope of 5-face; 6-shield machine outline line.

Detailed description of the invention

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described, but the utility model is not limited to these embodiments.

See Fig. 1, Fig. 2, this shield machine export & import reinforcing structure, comprise: in the soil body at shield machine export & import hole place, be furnished with pre-lining cutting arc concrete sheet 1(along shield machine outline line 6 hoop and also can be pre-lining cutting frid or arc shell concrete sheet), all pre-lining cutting arc concrete sheet 1 compact siro spinning technology together, form pre-lining cutting circular tube structure (i.e. advanced concrete lining).

Described pre-lining cutting arc concrete sheet 1 adopts concrete form, and the inner edge line of its pre-lining cutting circular tube structure be connected to form overlaps with shield machine outline line, or be positioned at shield machine outline line inner side, be 0 ~ 30mm with the distance of shield machine outline line.The size of pre-lining cutting arc concrete sheet 1 comprehensively can be determined according to soil layer situation, construction equipment performance and design parameters, and common is: width 1 ~ 2.5m, thickness 0.4 ~ 0.8m, length 6 ~ 15m.

At some caving ground, pre-lining cutting circular tube structure and other textural association can be realized jointly the stable of the hole soil body.In the occasion needing to reinforce the soil body within the scope of face inside shield machine outline line, or the occasion that geological conditions does not allow to be used alone the pre-lining methods in tunnel and needs other engineering method auxiliary construction, the pre-lining method in the method such as horizontal jet grouting or single, double liquid grout and tunnel can be used to be combined, jointly to realize hole soil stabilization.

In the present embodiment, in the soil body 5 within the scope of the hole surrounding soil 2 outside pre-lining cutting circular tube structure and the face of inner side, establish horizontal jet grouting injection ruggedized construction (horizontal jet grouting injection and the ruggedized construction formed).

Horizontal jet grouting injection ruggedized construction in hole surrounding soil 2 outside described pre-lining cutting circular tube structure is horizontal jet grouting stub 4, close proximity between horizontal jet grouting stub 4 is horizontal, define horizontal jet grouting wall for grouting, the long 2 ~ 5m of horizontal jet grouting stub 4, diameter is 0.6 ~ 1.5m.

Horizontal jet grouting injection ruggedized construction in the soil body 5 within the scope of face inside described pre-lining cutting circular tube structure is horizontal rotary jet strengthening stake 3, the length of horizontal rotary jet strengthening stake 3 is identical with pre-lining cutting arc concrete sheet, and the diameter of horizontal rotary jet strengthening stake 3 is 0.6 ~ 1.5m.

For certain embodiment, stratum residing for this embodiment is water rich strata, and for this strata condition, this embodiment uses following Specific construction scheme:

1, before carrying out the construction of pre-lining cutting circular tube structure, first horizontal jet grouting wall for grouting and horizontal rotary jet strengthening pile driving construction are carried out to face, see Fig. 3, wherein:

1. rotary churning pile design stake footpath 1000mm, pitch of holes 900mm are 300mm without service depot four trestle column bottom trestle column 900mm(), overlap between stake between 100mm, row and overlap 100mm; Outside distance shield machine outline line centered by 500mm, carry out the construction of horizontal jet grouting wall for grouting in hoop 1000mm width range, the long 3m of construction stake;

2. the soil body within the scope of face inside shield machine outline line, carries out horizontal rotary jet strengthening pile driving construction, arranges 11 rows altogether up and down, single construction length 12 meters (pre-lining cutting position is 3 meters).

Horizontal jet grouting wall for grouting and horizontal rotary jet strengthening pile driving construction comprise the steps:

(1) preparation of construction: equipment is marched into the arena, fixed pile surveying setting-out, adjustment rig angle orientation, installing drill is first-class, checkout facility, guarantees that high-pressure pump, probe, nozzle etc. can normally work.

(2) perforate: install orifice tube after perforate, and weld with orifice tube with reinforcing bar, reinforce orifice tube.

(3) creep into: adjustment rig, position, hole aligns, and starter and first drilling rod are sent into orifice tube, and when creeping into, Timing measurement dilling angle, once find that deflection will be rectified a deviation, in time until drilling to completion;

(4) high-pressure mortar spraying: should check high-pressure injection pump before carrying out high-pressure mortar spraying, checks whether pump pressure reading reaches designing requirement (35 to 40MPa), could start whitewashing when pump pressure reaches designing requirement; At the bottom of hole, should certain hour be stopped during high-pressure mortar spraying, and then slowly pull out drilling rod, high-pressure mortar spraying while drilling rod rollback outward; When Kelly Stubb stops slip casting to apart from during the 1.0m of aperture, close slurry channels, more slowly extract drilling rod, carry out sealing of hole operation;

Every root high-pressure rotary-spray drilling rod should be rinsed well with clear-water high-pressure after extracting immediately, and when avoiding residual slurry to solidify and cause next churning, residual particles blocks nozzle, moves to next position after cleaning.

In addition, in order to ensure the operating condition of the pre-lining cutting in tunnel, water shutoff was carried out before applying pre-lining cutting circular tube structure, except adopting the method for horizontal jet grouting wall for grouting, (horizontal jet grouting wall for grouting embedded depth is about 3 meters, for the construction of pre-lining cutting circular tube structure provides good operating condition), also can adopt when shield machine enters hole, at hole, the method solution seepy questions such as watertight rubber plate are installed.

Horizontal jet grouting wall for grouting and horizontal rotary jet strengthening pile driving construction, horizontal jet grouting construction process is shown in Fig. 3.

2, carry out shield machine export & import reinforcing structure (also known as the pre-liner structure in tunnel or advanced liner structure) construction process and see Fig. 4, comprise the steps:

Step one, face and the cleaning of construction plant and the installation of lining device, determine the construction station of pre-lining cutting by designing requirement, adjustment driving fills with concrete machine (i.e. the pre-lining construction in tunnel equipment) to pre-lining cutting original position.

Step 2, startup driving fill with concrete machine, axially tunnel forward along tunnel, the dregs under cutting is circled round by augers simultaneously and discharge, thus between the soil body, form the long column shape dead slot that cross section is arc.

Step 3, driving are filled with concrete machine and are tunneled to the embedded depth of design, and rollback limit, limit is upwards stated pressure in soil box by built-in catheter and outer connecting pump tube in driving filling concrete machine and filled with ready mix concrete, namely forms pre-lining concrete prefabricated component after concrete setting.

Step 4, around hole, apply several engaged pre-lining cutting arc concrete sheets 1 continuously by sequence of construction hoop, form a circular tube structure, namely pre-lining cutting circular tube structure, reinforces the hole soil body.

In the present embodiment, construct in shield machine access pre-lining cutting circular tube structure time, inside shield machine outline line, 30mm hoop arranges 23 pieces of pre-lining cutting arc concrete sheets altogether, the horizontal embedded depth of single width lining cutting sheet is 11m, width is 980mm, the total groundwater increment 101.2m of thickness 400mm, C30 commercial concrete 3.

Construction of the present utility model, adopt the pre-lining methods in tunnel to reinforce shield machine discrepancy hole surrounding soil or the face soil body, or the method adopting the pre-lining methods in tunnel to combine with other construction method is reinforced to hole or face.

Only adopt tunnel pre-lining methods to reinforce hole or face: be applicable to that water content of soil is less, excavation time face self-stability better, only need carry out the situation of support reinforcement to the shield machine outline soil body.

Adopt the method that the pre-lining methods in tunnel combines with other construction method: be applicable to complex geologic conditions, not only need to carry out support reinforcement to the shield machine outline soil body, also need the occasion that the soil body within the scope of face inside shield machine outline line is reinforced, or the occasion that geological conditions does not allow to be used alone the pre-lining methods in tunnel and needs other engineering method auxiliary construction.Other construction method described refers to the horizontal rotary jet strengthening method commonly used this area, general single liquid or two fluid grouting method etc., can select according to geological condition and site operation situation, for solving water shutoff problem when solidifying of the working face or construction.In the present embodiment, employing be horizontal jet grouting method, i.e. construction level churning wall for grouting and horizontal rotary jet strengthening stake.

Claims (9)

1. a shield machine export & import reinforcing structure, it is characterized in that, comprise: in the soil body at shield machine export & import hole place, pre-lining cutting arc concrete sheet (1) is arranged along shield machine outline line (6) hoop, all pre-lining cutting arc concrete sheet (1) compact siro spinning technology together, form a closed pre-lining cutting circular tube structure.
2. shield machine export & import reinforcing structure according to claim 1, is characterized in that, described pre-lining cutting arc concrete sheet (1) is concrete form.
3. shield machine export & import reinforcing structure according to claim 1, it is characterized in that, the inner edge line of described pre-lining cutting circular tube structure overlaps with shield machine outline line, or be positioned at shield machine outline line inner side, be 0 ~ 30mm with the distance of shield machine outline line.
4. shield machine export & import reinforcing structure according to claim 1, is characterized in that, described pre-lining cutting arc concrete sheet (1) width is 1 ~ 2.5m, and thickness 0.4 ~ 0.8m, length is 6 ~ 15m.
5. shield machine export & import reinforcing structure according to claim 1, it is characterized in that, in the soil body (5) within the scope of the hole surrounding soil (2) outside described pre-lining cutting circular tube structure and the face of inner side, be provided with horizontal jet grouting injection ruggedized construction.
6. shield machine export & import reinforcing structure according to claim 5, it is characterized in that, horizontal jet grouting injection ruggedized construction in hole surrounding soil (2) outside described pre-lining cutting circular tube structure is horizontal jet grouting stub (4), close proximity between horizontal jet grouting stub (4), defines horizontal jet grouting wall for grouting.
7. shield machine export & import reinforcing structure according to claim 6, is characterized in that, the long 2 ~ 5m of described horizontal jet grouting stub (4), diameter is 0.6 ~ 1.5m.
8. shield machine export & import reinforcing structure according to claim 5, is characterized in that, the horizontal jet grouting injection ruggedized construction in the soil body (5) within the scope of the face inside described pre-lining cutting circular tube structure is horizontal rotary jet strengthening stake (3).
9. shield machine export & import reinforcing structure according to claim 8, is characterized in that, the length of described horizontal rotary jet strengthening stake (3) is identical with pre-lining cutting arc concrete sheet, and the diameter of horizontal rotary jet strengthening stake (3) is 0.6 ~ 1.5m.
CN201420695776.5U 2014-11-19 2014-11-19 A kind of shield machine export & import reinforcing structure CN204253056U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105134248A (en) * 2015-09-08 2015-12-09 中国科学院武汉岩土力学研究所 Vibration-resistant and damping method for connection part of shield tunnel and vertical shaft
CN107013225A (en) * 2017-04-13 2017-08-04 叶晓明 The anti-collapse tunneling shield method of churning water shutoff
CN108643933A (en) * 2018-04-27 2018-10-12 中铁十二局集团有限公司 Shield receives portal reinforcement means
CN109098732A (en) * 2018-09-07 2018-12-28 中铁十二局集团有限公司 Full section of tunnel high-pressure horizontal rotary churning pile reinforced construction method
CN110005419A (en) * 2019-04-09 2019-07-12 上海市机械施工集团有限公司 A kind of shield tunnel end reinforcement means
CN110735642A (en) * 2019-09-26 2020-01-31 中建市政工程有限公司 shield originating end combined type reinforcing structure and construction method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105134248A (en) * 2015-09-08 2015-12-09 中国科学院武汉岩土力学研究所 Vibration-resistant and damping method for connection part of shield tunnel and vertical shaft
CN105134248B (en) * 2015-09-08 2017-08-25 中国科学院武汉岩土力学研究所 The antidetonation and shock-dampening method of a kind of shield tunnel and vertical shaft connecting portion
CN107013225A (en) * 2017-04-13 2017-08-04 叶晓明 The anti-collapse tunneling shield method of churning water shutoff
CN107013225B (en) * 2017-04-13 2019-03-01 叶晓明 The anti-collapse tunneling shield method of whirl spraying water shutoff
CN108643933A (en) * 2018-04-27 2018-10-12 中铁十二局集团有限公司 Shield receives portal reinforcement means
CN109098732A (en) * 2018-09-07 2018-12-28 中铁十二局集团有限公司 Full section of tunnel high-pressure horizontal rotary churning pile reinforced construction method
CN110005419A (en) * 2019-04-09 2019-07-12 上海市机械施工集团有限公司 A kind of shield tunnel end reinforcement means
CN110735642A (en) * 2019-09-26 2020-01-31 中建市政工程有限公司 shield originating end combined type reinforcing structure and construction method thereof

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