CN107761753A - A kind of foundation ditch water burst rapid rescue slip casting method for blocking - Google Patents
A kind of foundation ditch water burst rapid rescue slip casting method for blocking Download PDFInfo
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- CN107761753A CN107761753A CN201710977510.8A CN201710977510A CN107761753A CN 107761753 A CN107761753 A CN 107761753A CN 201710977510 A CN201710977510 A CN 201710977510A CN 107761753 A CN107761753 A CN 107761753A
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Abstract
The invention discloses a kind of foundation ditch water burst rapid rescue slip casting method for blocking, comprise the following steps：Dangerous situation carries out the placement of timely back-pressure and relief tube after occurring；Foundation ditch EXIT POINT position is determined, apart from bored concrete pile certain position is progress surface drilling construction at rotary churning pile axial location in foundation pit side-wall, when drilling construction to conduit pipe opening position, lower certain length sleeve pipe and lower pvc pipe to conduit pipe opening position；Slip casting pump conduit is connected with pvc pipe, opens grouting pump pumping cement mortar list liquid；When having observed cement mortar outflow at relief tube, start to note rapid hardening plasmoid humor, slurries are rapid in conduit pipe to condense hardening, until relief tube no longer there are flowing out, so far realizes the complete closure to conduit pipe.This method can realize the quick blocking of foundation pit side-wall water burst, answer acute treatment to play an important roll foundation pit side-wall discharge disaster.
Description
Technical field
The present invention relates to a kind of foundation ditch water burst rapid rescue slip casting method for blocking, belongs to foundation ditch, tunnel and other underground works
The anti-field of harnessing the river of journey.
Background technology
In Excavation Process, because geological conditions is poor, the lateral runoff of underground water or rotary churning pile pile quality are bad,
Frequently result in foundation pit side-wall and the percolating water even high hydraulic pressure water burst of big flow occurs, because processing easily triggers foundation pit side-wall not in time
Landslide, causes serious accident, for such situation, realizes rapid rescue, and it is necessary, slip casting to reduce loss as far as possible
Effective means of the method as water reinforcement, always applied in the improvement of underground engineering water disaster, but still it is faced with present a lot
Technical barrier, conduit pipe can not determine effectively, and invalid diffusion of slurries etc. causes rescue not carry out smoothly, delay danger
In the optimal improvement period of feelings, cause serious accident.Therefore a kind of foundation ditch water burst rapid rescue slip casting method for blocking is needed
Change current condition.
The content of the invention
The invention aims to overcome the shortcomings of above-mentioned existing salvage of foundation pits method, there is provided a kind of foundation ditch water burst is quick
Speedily carry out rescue work slip casting method for blocking.
To achieve the above object, the present invention uses following technical proposals：
A kind of foundation ditch water burst rapid rescue slip casting method for blocking, comprises the following steps：
Step 1：After water burst occurs in foundation pit side-wall, back-pressure measure is taken rapidly, and sandbag and anti-is accumulated on the inside of foundation pit side-wall
Firming layer, and embedding relief tube；
Further, described relief tube inner end is placed in EXIT POINT position, and one layer of filter screen of external port colligation, outer end is through instead
Firming layer, expose to outside back-pressure soil layer；Or spiral stainless steel filtering net is used, and sandbag is put in relief tube near ports pad, prevent
Move stopping leak pressure pipe position；
Step 2：Vertical range of the EXIT POINT apart from foundation pit side-wall edge is measured, then rational drilling scheme, drilling
At the axis of rotary churning pile on the outside of position selection bored concrete pile, drilling depth to EXIT POINT opening position；
Step 3：After the completion of hole to be drilled, lower certain length sleeve pipe simultaneously carries out sealing using injecting paste material to sleeve pipe, and sealing is complete
Cheng Hou, carry out cleaning bottom of hole and simultaneously sleeve pipe sealing quality tested by water filling, after the assay was approved, by under pvc pipe to designated depth,
I.e. with EXIT POINT parallel position；
Step 4：After slip casting pump conduit is connected with pvc pipe, clear water is pumped, checks pipeline closure and connectedness,
After all preparations are errorless, open cement mortar pulp-inlet pipe road, carry out cement mortar single fluid grouting, at the same keep a close eye on foundation pit side-wall and
Back-pressure layer situation, prevents running pulp, and certain influence is produced to foundation pit side-wall and back-pressure layer；And observe relief tube pipeline water quality
Situation of change, i.e., whether there is cement grout outflow；
Step 5：To be seen to change note rapid hardening plasmoid humor to after there is cement grout outflow, setting time is controlled in certain limit
It is interior, allow slurries to reside in as far as possible in conduit pipe.After relief tube no longer there are flowing out, i.e., whole conduit pipe is by whole
After closure, slip casting terminates.
Further, in the step 1, back-pressure must be timely, is determined on a case-by-case basis, when soil body back-pressure is unable to reach
During effect, it is proposed that using concrete back-pressure；The embedding of relief tube will be as far as possible near EXIT POINT, pressure release length of tube and filter
Screen distance is depending on specific stratum particle size.
Further, in the step 3, bore diameter, casing length and pvc pipe diameter depending on Specific construction situation,
This method is to this without particular/special requirement.It is more accurate to drilling depth and Grouting Pipe length requirement, determined depending on EXIT POINT position.
Further, in the step 4, the purpose of cement injection is the search procedure of conduit pipe, passes through cement mortar
Whether the position for judging conduit pipe can be come out from relief tube with subsurface flow.The cement injection list liquid time does not limit specifically
It is fixed, it is defined depending on the outflow of relief tube reclaimed water mud, if grouting pump hypertonia (in theory no more than 1.5 times of hydraulic pressure) or foundation ditch
Running pulp phenomenon, which occurs, in side wall should then stop noting single slurry；After waiting for a period of time, new bore slip casting again is bored or opened again.
Further, in the step 5, the selection of rapid hardening plasmoid humor does not limit, generally cement-sodium silicate double liquid
Or chemical plasmoid humor, if from cement-sodium silicate double liquid, under normal circumstances, the ratio of mud 1:1, cement mortar and waterglass
The ratio between also be 1:1, it is P.O32.5, density 1.69g/cm that wherein strength of cement grout grade, which is not less than,3, modulus of water glass is in 2-3
Between, Baume degrees Be is between 35-40；If from chemical plasmoid humor, should avoid as far as possible in principle to underground water and surrounding ring
The pollution in border；Slip casting blocking time is specifically determined depending on relief tube no longer there are flowing out by field technician.
The invention mainly relates to method, how excessively to be repeated using not doing for grouting pump, high-voltage tube, injecting paste material etc..
Beneficial effects of the present invention are as follows：
The present invention have studied a kind of foundation ditch water burst rapid rescue slip casting method for blocking, realize slip casting method in foundation pit side-wall water
Effective utilization in evil improvement, compared with currently existing method, this method is successfully realized the accurate determination of conduit pipe, slurries
Effective diffusion, there is certain exemplary role to related rescue.
The present invention realizes a kind of foundation ditch water burst rapid rescue slip casting method for blocking, has advantages below：
1st, the accurate determination of conduit pipe is realized by the mobility of cement grout, reduces unnecessary lookup underground
The work in water source.
2nd, rapid hardening plasmoid humor setting time is controllable, and effective diffusion of slurries can be achieved, and has both reduced slurries due to solidifying
Tie the time it is excessively slow and with the invalid loss of underground water, turn avoid slurries because setting time is too fast, and cause the blocking of Grouting Pipe.
3rd, a kind of foundation ditch water burst rapid rescue slip casting method for blocking of the present invention, which realizes, determines and notes in conduit pipe
The saving on blocking time is starched, and ensures the water blockoff quality of rescue, foundation ditch dangerous situation can be achieved and quickly control.
4th, the economic loss that reduction is speedily carried out rescue work and schedule delays are brought.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is foundation ditch conduit pipe Groundwater Flow schematic diagram；
Fig. 2 is that cement list liquid spreads schematic diagram in conduit pipe；
Fig. 3 is that rapid hardening plasmoid humor realizes that conduit pipe blocks schematic diagram completely；
In figure：1 --- the outer stratum of foundation ditch；2 --- rotary churning pile；3 --- bored concrete pile；4 --- soil nail wall；5 --- water guide leads to
Road；6 --- back-pressure soil layer；7 --- relief tube；8 --- loaded filter；9 --- direction of groundwater flow；10 --- support sandbag；
11 --- stratum is not excavated in foundation ditch；12 --- phreatic line；13 --- underground water；14 --- cement mortar list liquid；15——
Grouting Pipe；16 --- rapid hardening plasmoid humor.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, exist in the prior art in Excavation Process, due to geological conditions is poor,
The lateral runoff of lower water or rotary churning pile pile quality are bad, frequently result in foundation pit side-wall the percolating water even high hydraulic pressure of big flow occurs and gush
Water, easily trigger foundation pit side-wall landslide not in time due to handling, cause serious accident, for such situation, realize quick
Speedily carry out rescue work, it is necessary, effective means of the slip casting method as water reinforcement, always applied to underground engineering to reduce loss as far as possible
In the improvement of water disaster, but many technical barriers are still faced with present, conduit pipe can not be determined effectively, the invalid diffusion of slurries
Deng cause rescue can not smoothly carry out, be delayed the optimal improvement period of dangerous situation, cause serious accident.Therefore one is needed
Foundation ditch rapid rescue method is planted to change current condition.
In order to solve technical problem as above, present applicant proposes a kind of foundation ditch water burst rapid rescue slip casting method for blocking.
In a kind of typical embodiment of the application, as shown in Figure 1, there is provided a kind of foundation ditch water burst rapid rescue slip casting
Method for blocking, it is specific as follows：
Step 1：After water burst occurs in foundation pit side-wall, back-pressure measure is taken rapidly, and embedding in back-pressure soil layer 6 is in advance let out
Pressure pipe 7, relief tube inner end is set to be placed in EXIT POINT position, external port sets loaded filter 8, prevents the soil body to be largely lost in underground water, therefore
One layer of filter screen of colligation is answered, or uses spiral stainless steel filtering net, sandbag 10 is supportted in the advance expenditure of relief tube near ports, prevents relief tube
Position is moved, and when underground water along conduit pipe from relief tube outflow, and there is no compared with big yield at back-pressure layer other positions
Water flows out, then back-pressure reaches effect；
Step 2：Vertical range of the EXIT POINT apart from foundation pit side-wall edge is measured, to ensure vertically optional starting point end colligation
The tape measure of plummet.Then rational drilling scheme, bore position selection on the outside of the bored concrete pile at the axis of rotary churning pile,
Drilling depth is to EXIT POINT opening position.Reason is as follows：1, apart from foundation pit side-wall edge certain distance, prevent because drilling and later stage
Foundation pit side-wall caused by slip casting destroys；2, foundation pit side-wall generation seepage water disaster, which is due to that rotary churning pile pile-forming effect is bad mostly, to be made
Into, drilling, which is arranged at rotary churning pile axis, realizes the reinforcement to rotary churning pile to greatest extent；
Step 3:After construction hole to be drilled, lower certain length sleeve pipe simultaneously carries out sealing using rapid hardening plasmoid humor to sleeve pipe,
After the completion of sealing, carry out cleaning bottom of hole and sleeve pipe sealing quality is tested by water filling, after the assay was approved, will extremely refer under pvc pipe
Depthkeeping degree, i.e., with EXIT POINT parallel position；
Step 4：After slip casting pump conduit is connected with pvc pipe, junction pressure relief pipe valve pumping clear water, inspection are opened
The closure of grouting pipeline connection is tested, after no problem to be checked, cement mortar pulp-inlet pipe road is opened, carries out cement mortar single fluid grouting,
Foundation pit side-wall and back-pressure layer situation are kept a close eye on simultaneously, is prevented because running pulp, certain shadow is produced to foundation pit side-wall and back-pressure layer
Ring.At the same time relief tube pipeline variation of water is observed, i.e.,：Whether cement grout outflow is had；
Step 5：To be seen to change note rapid hardening plasmoid humor to after there is cement grout outflow, setting time is controlled in certain limit
It is interior, allow slurries to reside in as far as possible in conduit pipe.After relief tube no longer there are flowing out, i.e., whole conduit pipe is by whole
After closure, slip casting terminates.
Step 6：After water disaster is disposed, the follow-up works such as pressure release and the cleaning of grouting pipeline are carried out.
Further, in the step 1, back-pressure must be timely, is determined on a case-by-case basis, when soil body back-pressure is unable to reach
During effect, it is proposed that using concrete back-pressure；The embedding of relief tube will be as far as possible near EXIT POINT, pressure release length of tube and filter
Screen distance is depending on specific stratum particle size.
Further, in the step 3, bore diameter, casing length and pvc pipe diameter depending on Specific construction situation,
This method is to this without particular/special requirement.It is more accurate to drilling depth and Grouting Pipe length requirement, determined depending on EXIT POINT position.
Further, in the step 4, the process for starting cement injection is the search procedure of conduit pipe, passes through water
Whether mud can come out the position for judging conduit pipe from relief tube with subsurface flow.The cement injection list liquid time is not made to have
Body limits, and is defined depending on the outflow of relief tube reclaimed water mud, if grouting pump hypertonia 1.5 times of hydraulic pressure (in theory no more than) or
Running pulp phenomenon, which occurs, in foundation pit side-wall should then stop noting single slurry, after waiting for a period of time, bore or open again new bore slip casting again.
Further, in the step 5, the selection of rapid hardening plasmoid humor does not limit, generally cement-sodium silicate double liquid
Or chemical plasmoid humor, if from cement-sodium silicate double liquid, under normal circumstances, the ratio of mud 1:1, cement mortar and waterglass
The ratio between also be 1:1, it is P.O32.5, density 1.69g/cm that wherein strength of cement grout grade, which is not less than,3, modulus of water glass is in 2-3
Between, Baume degrees Be is between 35-40；If from chemical plasmoid humor, should avoid as far as possible in principle to underground water and surrounding ring
The pollution in border；Slip casting blocking time is specifically determined depending on relief tube no longer there are flowing out by field technician.
Embodiment：
195 meters of station length is defended in the Qingdao region R3 lines Lingshan, is two layers of underground station；Big mileage open cut segment length 322
Rice, is single-storeyed frame structure.Residing landforms are strand accumulation area, mostly littoral sediment, river deposit composition, show as shore
Extra large marsh band landforms.Station original ground absolute altitude+5.0m, stratum is followed successively by from top to bottom：Plain fill 3m, the 3m of medium coarse sand containing mud,
Silty clay 3m, medium coarse sand 6m (clay content 8%), the 2.2m of gravelly sand containing cohesive soil, severely-weathered tufa stone 2.6m.Substrate is located at gravelly sand
Layer and severely-weathered layer junction.
During the May in 2016 of the morning 8 on the 23rd, when the western end of foundation ditch tries to dig to -3.5m downwards, side wall finds water burst at two, along stake
Between pour in foundation ditch, total flow about 40m3/ h, average water pressure reach 1.3MPa.Back-pressure is backfilled immediately, and uses relief tube pressure release, and
For EXIT POINT position everywhere, drilled at earth's surface according to the method for the invention and carry out slip casting closure, it is complete from back-pressure
Into to the complete closure for finally realizing foundation pit side-wall percolating water, total used time 4h.Using cement mortar list liquid and cement soluble glass paste
Slip casting is starched, altogether using 10 tons of cement, waterglass 1.2t.Salvage of foundation pits is realized on the basis of engineering cost is reduced as far as possible
Quick processing, effectively improves construction speed.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. a kind of foundation ditch water burst rapid rescue slip casting method for blocking, it is characterised in that comprise the following steps：
Step 1：After water burst occurs in foundation pit side-wall, back-pressure measure is taken rapidly, and back-pressure soil layer and sand are accumulated on the inside of foundation pit side-wall
Bag, and embedding relief tube；
Step 2：Vertical range of the EXIT POINT apart from foundation pit side-wall edge is measured, then rational drilling scheme, bore position
At the axis for selecting the rotary churning pile on the outside of bored concrete pile, drilling depth to EXIT POINT opening position；
Step 3：After the completion of hole to be drilled, lower certain length sleeve pipe simultaneously carries out sealing using injecting paste material to sleeve pipe, after the completion of sealing,
Cleaning bottom of hole is carried out simultaneously to test to sleeve pipe sealing quality by water filling, after the assay was approved, by under pvc pipe to designated depth, i.e., with
At EXIT POINT parallel position；
Step 4：After slip casting pump conduit is connected with pvc pipe, clear water is pumped, pipeline closure and connectedness is checked, treats one
Cut prepare it is errorless after, open cement mortar pulp-inlet pipe road, carry out cement mortar single fluid grouting, while keep a close eye on foundation pit side-wall and back-pressure
Layer situation, prevents running pulp, and certain influence is produced to foundation pit side-wall and back-pressure layer；And observe relief tube pipeline change of water quality
Situation, i.e., whether there is cement grout outflow；
Step 5：To be seen to change note rapid hardening plasmoid humor to after there is cement grout outflow, setting time controls within the specific limits, allowed
Slurries are resided in conduit pipe as far as possible.After relief tube no longer there are flowing out, i.e., whole conduit pipe is all blocked
Afterwards, slip casting terminates.
A kind of 2. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the step 1
In, described relief tube inner end is placed in EXIT POINT position, and outer end passes through back-pressure soil layer, exposed to outside back-pressure soil layer；External port is tied up
Prick one layer of filter screen or use spiral stainless steel filtering net.
A kind of 3. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the relief tube
Near ports pad puts sandbag, prevents relief tube position from moving.
4. a kind of foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that when in step 1
The soil body and sandbag back-pressure when being unable to reach effect, using concrete back-pressure.
5. a kind of foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that relief tube buries
Putting will be as far as possible near EXIT POINT, and pressure release length of tube and aperture of filter screen are depending on specific stratum particle size.
A kind of 6. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the step 3
In, bore diameter, casing length and pvc pipe diameter are depending on Specific construction situation, to drilling depth and Grouting Pipe length requirement
It is relatively accurate, determined depending on EXIT POINT position.
A kind of 7. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the step 4
In, the cement injection list liquid time is defined by the outflow of relief tube reclaimed water mud, if grouting pump hypertonia or foundation pit side-wall are run
Slurry phenomenon should then stop noting single slurry；After waiting for a period of time, new bore slip casting again is bored or opened again.
A kind of 8. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the step 5
In, generally cement-sodium silicate double liquid or the chemical plasmoid humor of rapid hardening plasmoid humor.
A kind of 9. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the step 5
In, the selection principle of described chemical plasmoid humor is should to avoid the pollution to underground water and surrounding environment as far as possible.
A kind of 10. foundation ditch water burst rapid rescue slip casting method for blocking as claimed in claim 1, it is characterised in that the step 5
In, if from cement-sodium silicate double liquid, under normal circumstances, the ratio of mud 1:1, the ratio between cement mortar and waterglass are also 1:
1, it is P.O32.5, density 1.69g/cm that wherein strength of cement grout grade, which is not less than,3, modulus of water glass is between 2-3, Baume
Be is spent between 35-40, and slip casting blocking time is specifically determined depending on relief tube no longer there are flowing out by field technician.
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| CN108589735A (en) * | 2018-05-10 | 2018-09-28 | 广州地铁设计研究院有限公司 | A kind of Tunnel gushing treatment method |
| CN108999195A (en) * | 2018-08-22 | 2018-12-14 | 山东大学 | It is a kind of block the larger water burst of deep-foundation side wall stratum in the safe grouting construction process of step heap weir formula |
| CN109098197A (en) * | 2018-09-04 | 2018-12-28 | 中电建南方建设投资有限公司 | One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method |
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| CN108589735A (en) * | 2018-05-10 | 2018-09-28 | 广州地铁设计研究院有限公司 | A kind of Tunnel gushing treatment method |
| CN108999195A (en) * | 2018-08-22 | 2018-12-14 | 山东大学 | It is a kind of block the larger water burst of deep-foundation side wall stratum in the safe grouting construction process of step heap weir formula |
| CN108999195B (en) * | 2018-08-22 | 2019-10-29 | 山东大学 | It is a kind of block the larger water burst of deep-foundation side wall stratum in the safe grouting construction process of step heap weir formula |
| CN109098197A (en) * | 2018-09-04 | 2018-12-28 | 中电建南方建设投资有限公司 | One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method |
| CN109706935B (en) * | 2019-01-18 | 2023-10-17 | 山东建勘集团有限公司 | Anchor hole grouting water plugging device in pressure-bearing water stratum and working method thereof |
| CN109706935A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Anchor hole grouting for water blocking device and its working method in a kind of artesian water stratum |
| CN109881694A (en) * | 2019-04-04 | 2019-06-14 | 中铁十一局集团城市轨道工程有限公司 | A kind of constructing structure blocked for foundation pit substrate Sand and method |
| CN109881694B (en) * | 2019-04-04 | 2024-02-06 | 中铁十一局集团城市轨道工程有限公司 | Construction structure and method for plugging foundation pit substrate water and sand gushing |
| CN110939150A (en) * | 2019-12-12 | 2020-03-31 | 周希圣 | Emergency rescue method for rapidly constructing large-hydraulic-slope-drop-ratio thin-wall structure in confined water inrush accident state |
| CN112031811A (en) * | 2020-07-22 | 2020-12-04 | 济南力稳岩土工程有限公司 | System and method for blocking cliff through water burst and grouting |
| CN112095647A (en) * | 2020-09-18 | 2020-12-18 | 江苏建院营造股份有限公司 | Plugging method for quickly plugging leakage point of waterproof curtain |
| CN113585370A (en) * | 2021-07-30 | 2021-11-02 | 广州市城市规划勘测设计研究院 | Plugging method for core-pulling hole |
| CN115354987A (en) * | 2022-09-14 | 2022-11-18 | 贵州大学 | Mine water inrush treatment method |
| CN115354987B (en) * | 2022-09-14 | 2024-01-19 | 贵州大学 | Mine water inrush treatment method |
| CN118065412A (en) * | 2024-04-22 | 2024-05-24 | 广州建筑股份有限公司 | High-flow water burst plugging method for side wall of foundation pit |
| CN118065412B (en) * | 2024-04-22 | 2024-06-21 | 广州建筑股份有限公司 | High-flow water burst plugging method for side wall of foundation pit |
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