CN106089245B - One kind postpones grouting method after being used for single shield TBM walls - Google Patents

One kind postpones grouting method after being used for single shield TBM walls Download PDF

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Publication number
CN106089245B
CN106089245B CN201610475430.8A CN201610475430A CN106089245B CN 106089245 B CN106089245 B CN 106089245B CN 201610475430 A CN201610475430 A CN 201610475430A CN 106089245 B CN106089245 B CN 106089245B
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CN
China
Prior art keywords
ring
slip casting
grouting
point
points
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CN201610475430.8A
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Chinese (zh)
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CN106089245A (en
Inventor
孙鹤明
刘拴锭
张志伟
张波
彭朝阳
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中交一公局第三工程有限公司
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Priority to CN201610475430.8A priority Critical patent/CN106089245B/en
Publication of CN106089245A publication Critical patent/CN106089245A/en
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Publication of CN106089245B publication Critical patent/CN106089245B/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

Abstract

One kind postpones grouting method after being used for single shield TBM walls, it is characterised in that step is as follows:Before slip casting is started, check grouting equipment whether normal operation, check whether Grouting Pipe unobstructed, and hole for hoist port lid avoids cement mortar during slip casting from being flowed out from hole for hoist with the presence or absence of not screwing on or do not tighten;Slip casting point is selected at face 90m;Slip casting is controlled in 0.2~0.3MPa using left and right alternating, the method to complement one another, grouting pressure;Pouring quality and in time cleaning equipment pipeline are checked after the completion of perfusion.The characteristics of present invention is short using the setting time of slurries, is grouped slip casting, and grouting behind shaft or drift lining triangle basin is overlapped mutually, reach the closely knit effect of grouting behind shaft or drift lining, it is final beans gravel, slurries and section of jurisdiction is formed an entirety, shaping section of jurisdiction faulting of slab ends is reduced, reduces water seepage of tunnel rate.

Description

One kind postpones grouting method after being used for single shield TBM walls
Technical field
With the raising of complete-section tunnel boring machine (TBM) driving speed and pipe-plate lining effect, it is widely used in tunnel In road construction, driving, prefabricated pipe section lining cutting, grouting be- hind segment are the major control links in constructing, the structure of prefabricated pipe section Size, the concrete strength of prefabricated pipe section, the quality of grouting be- hind segment are the basic of guarantee lining quality.
Background technology
With constantly bringing forth new ideas for single shield TBM technologies, single shield TBM it is more and more extensive be applied to domestic subway field. Beans gravel hydraulic reclamation slurry injection technique plays an important role as the rock matter bottom list shield TBM important procedures constructed.But due to Single shield TBM not pressurizes in tunneling process, slip casting are synchronized in time after conventional hydraulic reclamation beans gravel, one is ensured with this Filling to beans gravel gap.But problems are present in synchronous grouting, because synchronous grouting position is located on the outside of shield tail, warp Often result in shield tail spillage and slurries and flow into cutterhead, contaminated equipment, while be difficult to clear up, waste slurries, cause grouting behind shaft or drift lining Uneven, cavity causes Tunnel Water Leakage after forming wall;Other slurries, which flow into cutterhead, causes cutterhead to be shut, and has a strong impact on that equipment is transported OK.Meanwhile slurries can flow into the gap of shield body and rock stratum by the space of peripheral rock, ultimately result in card shield, can not continue to apply Work.By the research and improvement to original grouting behind shaft or drift lining method, a kind of delay slip casting side after being used for single shield TBM walls of now invention Method, grouting behind shaft or drift lining condition of construction is improved with this, avoids shield tail spillage, returns the corresponding problems such as slurry card shield, improve grouting behind shaft or drift lining quality, Lift operating efficiency.
The content of the invention
One kind postpones grouting method after being used for single shield TBM walls, it is characterised in that one kind is prolonged after being used for single shield TBM walls Slow grouting method, it is characterised in that replaced by postponing slip casting and left and right after the wall of section of jurisdiction, the side for the slip casting that complements one another, is grouped Method, reach filling beans gravel space, close the purpose of section of jurisdiction.After the section of jurisdiction abjection tail shield of installation, just implement hydraulic reclamation immediately Beans gravel, it still suffers from substantial amounts of space after beans gravel hydraulic reclamation is full, but because the presence of beans gravel is as skeleton, support tube Piece, grouting behind shaft or drift lining can postpone to carry out.By postponing slip casting, slip casting position is arranged at face 90m, prevents slurries The problems such as flowing into shield tail, flow into cutterhead and returning slurry card shield.Slip casting is replaced by left and right, realizes that slurries are complementary, slip casting is uniform.Profit The characteristics of short with the setting time of slurries, slip casting is grouped, grouting behind shaft or drift lining triangle basin is overlapped mutually, and it is closely knit to reach grouting behind shaft or drift lining Effect, beans gravel, slurries and section of jurisdiction is formed an entirety.
One kind postpones grouting method after being used for single shield TBM walls, it is characterised in that step is as follows:
(1), before slip casting is started, check grouting equipment whether normal operation, check Grouting Pipe it is whether unobstructed, and lifting Hole port lid avoids cement mortar during slip casting from being flowed out from hole for hoist with the presence or absence of not screwing on or not tightening;
(2), slurries are transported to chassis by battery truck from well head blending station, then carry suction pump by chassis and slurries are pumped into platform Car mortar jar;
(3), slip casting point is selected at face 90m;
(4), slip casting is using left and right alternating, the method to complement one another, and every 6 endless tube piece is a circulation, and slip casting position exists Section of jurisdiction top, select, a position slip casting in 11 directions per ring at 1 point, left and right is alternately forward afterwards;Grouting sequence is first 1 point of ring, 11 points of the second ring, every two 1 point of ring note five rings, 11 points of the 6th ring, 1 point of the 3rd ring of note, 11 points of Fourth Ring again afterwards;Or Person is followed successively by 11 points of the first ring, 1 point of the second ring, every two 11 points of ring note five rings, 1 point of the 6th ring, afterwards again 11 points of the 3rd ring of note, 1 point of Fourth Ring;Above-mentioned 1 point or 11 points all referring to the position where splitting according to clock scale;Grouting pressure is controlled 0.2 ~0.3MPa;
(5) pouring quality and in time cleaning equipment pipeline are checked after the completion of, irrigating.
Further, slip casting 4m is needed per ring3, slurries per car carrying 4m3
Disturbed caused by development machine (TBM) construction around Stratum Loss and TBM tunnels or the kata-rocks by failure by shear Secondary consolidation and the infiltration of underground water again, it can all cause the stresses re-distribution of country rock.Simultaneously in order to prevent the deformation of Wall Rock of Tunnel, Make section of jurisdiction and overall load-carrying ring is formed by excavation country rock, between deformation and section of jurisdiction of the reduction section of jurisdiction under deadweight and interior load Changing of the relative positions unstability, it is necessary to carry out beans gravel hydraulic reclamation and section of jurisdiction in time to the annular space between the tunnel and section of jurisdiction external diameter excavated Grouting behind shaft or drift lining.The method adheres to the principle of " left and right replaces, complements one another, is grouped slip casting ", accomplishes ring ring slip casting so that section of jurisdiction with The cavity that country rock is formed is closely knit complete.
Postpone grouting method after this wall used, constructed with respect to TBM with the obvious advantage, it is simple to operate, carrying can be reached The intensity of pressure from surrounding rock, after the completion of pipe sheet assembling, carry out section of jurisdiction loopful beans gravel and uniformly backfill, and the section of jurisdiction to having backfilled is entered Row grouting behind shaft or drift lining, shaping section of jurisdiction faulting of slab ends is reduced, reduces water seepage of tunnel rate, achieves Expected Results.Using postponing slip casting after wall, Beans gravel is condensed, section of jurisdiction is obtained stabilization, while transmits rock pressure or internal water pressure, makes section of jurisdiction, the beans gravel condensed and encloses Rock forms closely knit entirety, and here it is postpone grouting method after wall.
Brief description of the drawings
Fig. 1 -- slip casting position view
Fig. 2 -- grouting sequence floor map,
Fig. 3 -- grouting sequence elevational schematic view,
Fig. 4 -- grouting sequence schematic perspective view.
Embodiment
Present embodiment uses technical scheme:Its operating process:
1st, before slip casting is started, check grouting equipment whether normal operation, avoid construction period because of downtime, influence into Degree.Check whether Grouting Pipe unobstructed, and hole for hoist port lid is with the presence or absence of screwing on or do not tighten, when avoiding slip casting cement mortar from Hole for hoist flows out.Effect is coagulated admittedly due to slurries, and should try one's best avoidance breakout in construction, or the event that the stand-by period is long.Respectively The linking of inter process is smooth, prevents grout cures from damaging equipment.
2nd, according to calculating, slip casting 4m is needed per ring3, slurries per car carrying 4m3Cement paste, by battery truck from well head blending station It is transported at 1# chassis, then suction pump is carried by chassis slurries are pumped into chassis mortar jar.
3rd, because single shield TBM uses open type boring mode, cutterhead front portion does not have pressure, to prevent from returning showing for slurry card shield As, slip casting point is selected in away from face 90m at 90m.Be as shown in Figure 1 slip casting position view, sequence number be 1. face, 2. sequence number is slip casting position.
4th, using left and right alternating, the method to complement one another, the method reserves an injected hole per ring and facilitates secondary benefit for slip casting Slurry, while also ensure that slip casting maximizes.Every 6 endless tube piece is a circulation, slip casting position on section of jurisdiction top, per ring selection 1, A position slip casting in 11 directions, afterwards left and right alternately forward.Grouting sequence is 1 point of the first ring (or 11 points), the second ring 11 points (or 1 points), every two ring note five rings 1 point (or 11 points), 11 points of the 6th ring (1 point), 1 point of the 3rd ring of note (or 11 again afterwards Point), 11 points of Fourth Ring (or 1 point).Floor map is illustrated in figure 2, is illustrated in figure 3 elevational schematic view, is illustrated in figure 4 Schematic perspective view, sequence number represents grouting sequence in figure.
5th, slip casting will follow up in time, prevent section of jurisdiction from forming big faulting of slab ends because rubble hydraulic reclamation is not full, influence construction quality.
Want close observation to alter slurry situation during slip casting, such as find that hole for hoist, section of jurisdiction circumferential weld and longitudinal joint, bolt hole have water When slurry liquid spills phenomenon, to take measures to be blocked in time.Rinse with water that (electrical equipment is smeared with dry to slurries Polluted area Cloth is cleared up), prevent slurries from polluting chassis, grouting pressure is normally controlled in 0.2~0.3MPa.
6th, pouring quality and in time cleaning equipment pipeline are checked after the completion of irrigating, prevents grout cures damage equipment, plugging, Prepare next ring slip casting.
Technical advantage
Postpone grouting method advantage after wall
(1) the method adheres to the principle of " one ring of driving is with regard to necessary hydraulic reclamation and the ring of slip casting one ", greatly reduces section of jurisdiction depression Reduce faulting of slab ends.Return slurry, card shield common fault is well solved.After pipe sheet assembling, first backfill beans gravel and hold section of jurisdiction, Laggard water-filling slurry prime.Now section of jurisdiction behind space is seldom by beans gravel pack, required slurries;Colleague's shield tail stops pulpboard Only slurry effect is played, slurries can be prevented to flow on the outside of shield, reduces the generation for returning slurry solidification card shield phenomenon.
(2) duct piece float upward is overcome.Caused buoyancy is conducted oneself with dignity much smaller than section of jurisdiction in bottom range, is insufficient to allow on section of jurisdiction It is floating.
(3) postpone slip casting shrinkage factor after wall to be obviously reduced.Because beans gravel does aggregate, cement grout simply fills beans gravel Gap, consolidation beans gravel, therefore hardly shrink space is formed behind in section of jurisdiction, be advantageous to sealing.
(4) postponing slip casting after wall makes to make section of jurisdiction and country rock because the not full problem of beans gravel hydraulic reclamation is addressed after the wall of section of jurisdiction Between cavity form uniform closed chamber, beans gravel concrete is formed after grouting, is advantageous to the lifting of tunnel total quality.
(5) postpone slip casting compared with synchronous loopful water filling cement mortar technique, after wall and greatly reduce plugging rate, and technique letter It is single.
(6) the full stabilization for being advantageous to section of jurisdiction of slip casting is postponed after wall.Section of jurisdiction is held by beans gravel, forms rigid support, no Section of jurisdiction can be caused to sink, reduce section of jurisdiction faulting of slab ends, and then prevent drainage.
(7) driving speed is accelerated, improves construction safety.Postpone slip casting after hydraulic reclamation beans gravel and wall to note than synchronous loopful Cement mortar is simple to operate, and water filling cement mortar must control injection speed, in order to avoid section of jurisdiction is pressurized, it is necessary to control driving Speed.And operating speed need not be controlled by postponing slip casting after beans gravel hydraulic reclamation and wall, reduce circulation time, accelerate driving speed Degree.
Chongqing region is used in tunneling boring hard rock mole (single shield TBM) work progress, and summary and induction draws such a list Shield TBM wall thickness postpones grouting method, and using the actual hydraulic reclamation effect of detections of radar, testing result shows all slip casting of more than 95% ring It is full, the ring plate floating often occurred in TBM constructions, sinkage are effectively controlled, is smoothed out after pipe sheet assembling without faulting of slab ends, outward appearance Cavitation quality is greatly improved, there is good economy, applicability.After beans gravel hydraulic reclamation and wall postpone slip casting by coring, Mud jacking inspection, normal hole section is qualified to have reached design requirement.

Claims (2)

1. one kind postpones grouting method after being used for single shield TBM walls, it is characterised in that step is as follows:
(1), before slip casting is started, check grouting equipment whether normal operation, check whether Grouting Pipe unobstructed, and hole for hoist hole Lid avoids cement mortar during slip casting from being flowed out from hole for hoist with the presence or absence of not screwing on or not tightening;
(2), slurries are transported to chassis by battery truck from well head blending station, then carry suction pump by chassis and slurries are pumped into chassis sand Starch tank;
(3), slip casting point is selected at face 90m;
(4), slip casting is using left and right alternating, the method to complement one another, and every 6 endless tube piece is a circulation, and slip casting position is in section of jurisdiction Top, select, a position slip casting in 11 directions per ring at 1 point, left and right is alternately forward afterwards;Grouting sequence is the first ring 1 Point, 11 points of the second ring, every two 1 point of ring note five rings, 11 points of the 6th ring, 1 point of the 3rd ring of note, 11 points of Fourth Ring again afterwards;Or 11 points of the first ring, 1 point of the second ring are followed successively by, every two 11 points of ring note five rings, 1 point of the 6th ring, 11 points of the 3rd ring of note, again afterwards 1 point of Fourth Ring;Above-mentioned 1 point or 11 points all referring to the position where splitting according to clock scale;Grouting pressure control 0.2~ 0.3MPa;
(5) pouring quality and in time cleaning equipment pipeline are checked after the completion of, irrigating.
2. according to the method for claim 1, it is characterised in that:Slip casting 4m is needed per ring3, slurries carrying 4m per chassis3
CN201610475430.8A 2016-06-25 2016-06-25 One kind postpones grouting method after being used for single shield TBM walls CN106089245B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107939420A (en) * 2017-08-21 2018-04-20 中铁六局集团有限公司 The construction method filled after two backing of bored tunnel assembled
CN110454194A (en) * 2019-08-06 2019-11-15 中广核工程有限公司 Shield-tunneling construction secondary grouting method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1362573A (en) * 2002-01-26 2002-08-07 刘丽萍 Construction mode with full cross-section tunneller
JP3753729B1 (en) * 2005-01-07 2006-03-08 株式会社ケー・エフ・シー Tunnel waterproof structure
CN101614124A (en) * 2008-06-27 2009-12-30 中铁隧道集团有限公司 Open type hard rock mole driving and secondary lining method for synchronously constructing
CN102562146A (en) * 2012-03-07 2012-07-11 深圳市市政工程总公司 Construction gap filling method and device for shield through air pushing section
CN103510964A (en) * 2013-07-31 2014-01-15 中铁隧道集团有限公司 Method for performing backfill grouting on pea gravel by adoption of shield type TBM in construction process
CN105649650A (en) * 2014-12-03 2016-06-08 中铁十八局集团有限公司 Back pea gravel blow filling grouting construction method for single-shield hard rock roadheader after installing TBM pipe piece

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1362573A (en) * 2002-01-26 2002-08-07 刘丽萍 Construction mode with full cross-section tunneller
JP3753729B1 (en) * 2005-01-07 2006-03-08 株式会社ケー・エフ・シー Tunnel waterproof structure
CN101614124A (en) * 2008-06-27 2009-12-30 中铁隧道集团有限公司 Open type hard rock mole driving and secondary lining method for synchronously constructing
CN102562146A (en) * 2012-03-07 2012-07-11 深圳市市政工程总公司 Construction gap filling method and device for shield through air pushing section
CN103510964A (en) * 2013-07-31 2014-01-15 中铁隧道集团有限公司 Method for performing backfill grouting on pea gravel by adoption of shield type TBM in construction process
CN105649650A (en) * 2014-12-03 2016-06-08 中铁十八局集团有限公司 Back pea gravel blow filling grouting construction method for single-shield hard rock roadheader after installing TBM pipe piece

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