CN103243728A - Water stop and plugging method for punching underground space wall - Google Patents
Water stop and plugging method for punching underground space wall Download PDFInfo
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- CN103243728A CN103243728A CN2013101849478A CN201310184947A CN103243728A CN 103243728 A CN103243728 A CN 103243728A CN 2013101849478 A CN2013101849478 A CN 2013101849478A CN 201310184947 A CN201310184947 A CN 201310184947A CN 103243728 A CN103243728 A CN 103243728A
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Abstract
The invention relates to a water stop and plugging method for punching an underground space wall. The water stop and plugging method comprises the following steps of step 1, drilling a plurality of holes at peripheral and central positions in an area which needs to be punched, utilizing a water pump to drain water which flows out of the holes and performing temporary plugging through a wooden wedge after drilling through; step 2, observing the water flow in a drilling process and finding out holes with large water pressure; step 3, installing fixtures comprising cutoff valves at the drilling positions; step 4, opening 2 to 4 cutoff valves which are arranged at positions with large water pressure to enable the 2 to 4 cutoff valves to drain water and closing the cutoff valves in the fixtures when the water flow has no change; step 5, enabling a high pressure grouting pipe to be connected with the fixtures and performing grouting on peripheral drilled holes according to the order of the water flow from small to large; step 6, performing secondary squeezing after achieving the grouting; and step 7, opening cutoff valves of non-grouted spare holes in the center of the punched area, observing whether water flows out or not, grouting holes if water flows out of the holes and stopping the grouting if no water flows out. The water stop and plugging method for punching the underground space wall has the advantages of being short in construction period, small in investment, easy to operate and suitable for water stop and plugging of underground space with large water pressure and rapid water flow.
Description
Technical field
This patent belongs to the building trade technical field of construction, relates to a kind of underground space body of wall sealing method for blocking that punches.
Background technology
At present, punch and need at deep layer underground space body of wall and adopt traditional sealing method for blocking in the engineering of through channel more.This method often adopts polyurethane slip casting shutoff, and still, this method is used for seepage flow or the little situation of current., current big for groundwater pressure are very big project situation also, and the polyurethane slurry injection technique is also inapplicable, and expense is very high.Our company has finally formed the practical sealing method for blocking of a cover through multi-faceted analyses demonstration and practical exploration.Being used for underground water is the situation of torrent, and expense is much lower than the polyurethane slurry injection technique.
Summary of the invention
This patent provides a kind of underground space body of wall sealing method for blocking that punches for solving the technical problem that exists in the known technology, and this method is applicable to the underground space sealing shutoff that hydraulic pressure is big, current are anxious.
The technical scheme that this patent is taked for the technical problem that exists in the solution known technology is:
A kind of underground space body of wall sealing method for blocking that punches is characterized in that: comprising:
S1, boring, some holes are bored in periphery and centre in the zone that needs punch, require to hole greater than the reinforced concrete wall of 300mm at thickness, after drilling through, discharge with the water that water pump will flow out from the hole, adopt the interim shutoff of timber wedge simultaneously;
S2, the discharge of observing each hole among the S1, the hole that discharge is big is judged to be the big hole of hydraulic pressure;
S3, at the place, hole that S1 bores jig is installed, is all included Water stop valve in each jig;
S4, open the Water stop valve in 2～4 holes of hydraulic pressure maximum, these 2～4 holes are discharged water, utilize the waterway channel in the current mediation space, close the Water stop valve in the jig when observation current are unconverted;
S5, the high-pressure slip-casting pipe is linked to each other with jig, according to current order from small to large slip casting is carried out in the hole of the periphery among the S1;
After S6, slip casting are finished, carry out the secondary squeeze note, of being chosen in three holes of in three holes of hydraulic pressure maximum and hydraulic pressure minimum carries out the secondary squeeze note;
S7, open the Water stop valve in standby hole that is positioned in the middle part of the zone that punches, observe it and whether there are flowing out, if there are flowing out, the Kong Zhongzai slip casting that there are flowing out.
This patent can also adopt following technical scheme:
Preferably, in the S5 step, the grouting pressure in each hole increases progressively according to time sequencing or maintains an equal level.
Preferably, in the S5 step, except the hole that needs the secondary squeeze note, the grouting pressure in each hole is 3～16MPa.
Preferably, the grouting pressure of secondary squeeze note is 25～30MPa.
Advantage and good effect that this patent has are:
After this patent has adopted above technical scheme, resist original water table by the bigger slip casting of pressure, and mortar solidifies after slip casting, by the slip casting in the porous, between two face walls, form underground water isolation strip, the underground space sealing shutoff big applicable to hydraulic pressure, that current are anxious.Material is single, can fully be full of the space, and certain intensity is arranged, and can improve concrete seal.
Description of drawings
Fig. 1 is the flow chart of this patent;
The schematic diagram in boring distribution and door opening zone when Fig. 2 is this patent construction;
Fig. 3 is the A-A sectional view of Fig. 2;
The schematic diagram of the jig when Fig. 4 is slip casting and wall syndeton.
Among the figure: 11, diaphragm wall; 12, inspection hole; 13, back pullout (BPO) hole; 14, injected hole; 15, underground passage; 21, first phase basement; 22, interim block wall; 23, the second stage of basement; 31, rubber pad; 32, chuck; 33, water pipe; 34, Water stop valve; 35, expansion bolt; 36, high-pressure slip-casting pipe.
The specific embodiment
For further understanding summary of the invention, characteristics and the effect of this patent, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, a kind of underground space body of wall sealing method for blocking that punches may further comprise the steps:
S1, boring, some holes are bored in periphery and centre in the zone that needs punch, require to hole greater than the reinforced concrete wall of 300mm at thickness, after drilling through, discharge with the water that water pump will flow out from the hole, adopt the interim shutoff of timber wedge simultaneously;
S2, the discharge of observing each hole among the S1, the hole that discharge is big is judged to be the big hole of hydraulic pressure;
S3, at the place, hole that S1 bores jig is installed, is all included Water stop valve in each jig;
S4, open the Water stop valve in 2～4 holes of hydraulic pressure maximum, these 2～4 holes are discharged water, utilize the waterway channel in the current mediation space, close the Water stop valve in the jig when observation current are unconverted;
S5, the high-pressure slip-casting pipe is linked to each other with jig, according to current order from small to large slip casting is carried out in the hole of periphery among the S1;
S6, the boring slip casting of whole peripheries finished after, carry out the secondary squeeze note, of being chosen in three holes of in three holes of hydraulic pressure maximum and hydraulic pressure minimum carries out the secondary squeeze note;
S7, open the Water stop valve in standby hole that is positioned in the middle part of the zone that punches, observe it and whether there are flowing out, if there are flowing out, the Kong Zhongzai slip casting that there are flowing out.
Preferably, in the S5 step, the grouting pressure in each hole increases progressively according to time sequencing or maintains an equal level.
Preferably, in the S5 step, except the hole that needs the secondary squeeze note, the grouting pressure in each hole is 3～16MPa.
Preferably, the grouting pressure of secondary squeeze note is 25～30MPa.
Embodiment:
Seeing also Fig. 1 to Fig. 4, is example with certain underground engineering, and this project is divided into first phase and the second stage of the project, and first stage of the project is through the use in 5 years.Desire now first phase and the underground passage (15) of second phase are connected, need be in underground wall body upward-acting door hole.The channel end of leading to first phase in the second phase is intercepted by the thick diaphragm wall of first phase 800mm (11) and the thick interim block wall (22) of 250mm, and is corresponding with the second stage of tunnel ends.Space between the twice wall has been full of yellow sand and underground water.To-13m place, groundwater pressure is bigger at-10m in the upright position of door opening.Open this passage, at first solve phreatic shutoff problem with regard to needs.
Specifically may further comprise the steps:
2.1, experiment boring: interim block wall (22) is positioned at first phase basement (21), just in operational phase, construction is inconvenient, therefore selects diaphragm wall (11) under the 800mm heavy back of the second stage of basement (23) punched to get out 1#～8# injected hole (14) in the scope.Adopt water to bore hole flushing, the drilling depth of diameter 50mm is 850mm.After drilling through, water can spray.Synchronous row takes out with the 2000w motor and water pump, adopts the interim shutoff of timber wedge simultaneously.
2.2, observe the current situation after each boring.
2.3, analyze to determine slip casting space scope, in conjunction with first phase and the design of the second stage of underground structure and construction situation, estimate that the suitable for reading and first phase passage in back pullout (BPO) hole (13) and diaphragm wall crack are main inflow direction.The design grouting process determines to adopt cement slip casing by pressure scheme.
2.4, grouting equipment adopts the facility of high pressure cement rotary churning pile, only stirs with the backstage and pressure send the slurry part, the high-pressure slip-casting pipe that is connected and fixed nozzle adds long process.
2.5, estimation expand tube bolt uplift resistance.As calculated, adopt Φ 12mm expansion bolt (35), in concrete, use to meet the demands more than 48 jigs of fabrication and installation.Need to make sample, confirm that the back is according to the quantity processing of injected hole.Jig comprises by expansion bolt (35) and is fixed on chuck (32) on the diaphragm wall (11), be lined with rubber pad (31) between chuck (32) and the diaphragm wall (11), the afterbody of chuck (32) links to each other with water pipe (33), and the afterbody of water pipe (33) is provided with Water stop valve (34)
2.6, increase suction pump, open 6#, 7#, the 8# three holes (see figure 3) that discharges water, purpose is to utilize the waterway channel of current mediation shutoff.After jig was installed, the setting pressure table carried out hydraulic pressure test.After discharging water 24 hours, observe current and do not have significant change, close the Water stop valve (34) of jig.
2.7, according to having bored the situation that 8 hole hydraulic pressure differ, formulate grouting sequence, grouting pressure and water/binder ratio.From minimum water pressure injected hole, arrange that grouting sequence is: 1#-3#-2#-4#-7#-8#-6#.Equipment is installed, debugging is normal, and supply line and ground connection meet the power supply for construction security regulations.The high-pressure slip-casting pipe is connected with jig.
2.8, slip casting
The check jig is connected closely with high-pressure slip-casting pipe (36), and jig is installed firmly, smooth the compressing of rubber pad (31); The cement paste agitator tank is erected and is filled to jar mouth 25cm down, and jar is down about preheating water temperature to 30 degree.
According to predefined principle: begin slip casting according to current order from small to large.This is that water pressure is less because of the little place of current, and the hole between the body of wall is also little, and the shutoff ratio is easier to success.
From the 1# hole, little pressure is slow to be annotated earlier, produces big pressure for preventing the interim block wall that slip casting is held to the greatest extent the first phase passage, and the Water stop valve (34) of open distal end 6#～8# injected hole discharges water.
Hole slip casting is closed Water stop valve (34) after half an hour approximately, Grouting Pipe is moved to the 3# hole continue slip casting half an hour, opens the ejection of 2# hole Water stop valve (34) slurries this moment, changes the slip casting of 2# hole.6#～8# hole discharges water all the time during this period, and it is limpid substantially slightly yellow to observe current, 2# hole slip casting 40 minutes, and 7# orifice flow slurry stops the slip casting of 2# hole.
Change the slip casting of 4# hole, only discharge water in the 8# hole this moment, and water colour is pale yellow.Slip casting checks after 25 minutes that slurries ejection in 5# hole closes 5# hole Water stop valve (34) at once, and the 8# orifice flow of annotate 5 minutes the time is starched, and stops.
Close the Water stop valve that discharges water (34) in 6#-8# hole, decontrol 2# hole Water stop valve (34), to 7#, 6#, 8# hole slip casting wherein intensified pressure and duration during the slip casting of 6# hole respectively, the 2# hole did not have slurries and flowed out this moment.
2.9 jelling time 3.5h.Final setting time 4.2h.For racing against time, slip casting is for the first time finished, and carries out the secondary squeeze note immediately.Select 2#, 6# two holes to do extruding slip casting respectively.Close the Water stop valve (34) of other jig, grouting pressure and roof pressure rotating speed strengthen (seeing Table 1).When slip casting in the time of 10 minutes, the rubber pad of the 2# hole jig fission shape of rising stops squeeze note.Changing 6# hole squeeze note stopped after 5 minutes.After secondary chokes and finishes, observe the 5# hole and whether there are flowing out, if there are flowing out, then carry out slip casting in the 5# hole.
Table 1 grouting pressure revolution speed parameter
| 3～ |
6～10MPa | More than the 20MPa |
| 200 commentaries on classics/min | 200～300 commentaries on classics/min | 400 commentaries on classics/min |
Table 2 grouting pressure value is selected
| Hole number | Preceding 0.5h | 0.5～2h | 3h～ | Remarks | |
| 1# | 3～ |
6～10MPa | ? | 6#, 7#, 8# |
|
| 3# | 6～10MPa | 10MPa | ? | 6#, 7#, 8# |
|
| 2# | 20MPa | ? | Secondary squeeze note 30MPa | The 6# hole discharges water | |
| 4# | 10～16MPa | 10～16MPa | ? | ? | |
| 8# | 6～ |
6～10MPa | ? | ? | |
| 6# | ? | ? | Secondary squeeze note 25MPa | ? | |
| 7# | ? | ? | ? | Full oar begins scleroma |
2.10 check
After 24 hours, slip casting place is checked, 50cm place above inspection method is reached the standard grade in the hole of desiring to open the door, corresponding 8#, 6# hole site are mended and are bored Φ 50mm inspection hole 12, and degree of depth 1m penetrates the former waterproofing protection layer of diaphragm wall and first phase, verifies anhydrous outflow.Between 5# hole horizontal line and 3#, 8#, mend in addition and bore a hole, degree of depth 1m, also anhydrous outflow.
Measure the cement thickness of 3 check hole drill core ends, be respectively 4.5cm, 5.4cm and 3.1cm, identical with the water source analysis before the slip casting.Realized the shutoff purpose, slip casting process so far finishes.After abolishing steel bar concrete, the diaphragm wall scope of punching checks that the side crack does not have any seepage.
Although by reference to the accompanying drawings the preferred embodiment of this patent is described above; but this patent is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under the enlightenment of this patent; not breaking away under the scope situation that this patent aim and claim protect, can also make a lot of forms, these all belong within the protection domain of this patent.
Claims (4)
1. underground space body of wall sealing method for blocking that punches is characterized in that: comprising:
S1, boring, some holes are bored in periphery and centre in the zone that needs punch, require to hole greater than the reinforced concrete wall of 300mm at thickness, after drilling through, discharge with the water that water pump will flow out from the hole, adopt the interim shutoff of timber wedge simultaneously;
S2, the discharge of observing each hole among the S1, the hole that discharge is big is judged to be the big hole of hydraulic pressure;
S3, at the place, hole that S1 bores jig is installed, is all included Water stop valve in each jig;
S4, open the Water stop valve in 2～4 holes of hydraulic pressure maximum, these 2～4 holes are discharged water, utilize the waterway channel in the current mediation space, close the Water stop valve in the jig when observation current are unconverted;
S5, the high-pressure slip-casting pipe is linked to each other with jig, according to current order from small to large slip casting is carried out in the hole of the periphery in the boring among the S1;
After S6, slip casting are finished, carry out the secondary squeeze note, of being chosen in three holes of in three holes of hydraulic pressure maximum and hydraulic pressure minimum carries out the secondary squeeze note;
S7, open the Water stop valve in standby hole that is positioned in the middle part of the zone that punches, observe it and whether there are flowing out, if there are flowing out, the Kong Zhongzai slip casting that there are flowing out.
2. the underground space body of wall according to claim 1 sealing method for blocking that punches, it is characterized in that: in the S5 step, the grouting pressure in each hole increases progressively according to time sequencing or maintains an equal level.
3. the underground space body of wall according to claim 1 sealing method for blocking that punches, it is characterized in that: in the S5 step, except the hole that needs the secondary squeeze note, the grouting pressure in each hole is 3～16M Pa.
4. the underground space body of wall according to claim 1 sealing method for blocking that punches, it is characterized in that: the grouting pressure of secondary squeeze note is 25～30MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184947.8A CN103243728B (en) | 2013-05-17 | 2013-05-17 | Water stop and plugging method for punching underground space wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184947.8A CN103243728B (en) | 2013-05-17 | 2013-05-17 | Water stop and plugging method for punching underground space wall |
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| CN103243728A true CN103243728A (en) | 2013-08-14 |
| CN103243728B CN103243728B (en) | 2015-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912003A (en) * | 2013-12-31 | 2014-07-09 | 中国人民解放军63653部队 | Method for conveniently and rapidly blocking stratum flowing water and pores |
| CN110670899A (en) * | 2019-10-11 | 2020-01-10 | 三门核电有限公司 | Construction method suitable for high-pressure leakage stoppage of building |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850228A (en) * | 1981-09-21 | 1983-03-24 | Ohbayashigumi Ltd | Control for ground water level in back side of sheathing wall |
| CN2861365Y (en) * | 2005-12-31 | 2007-01-24 | 中国矿业大学 | Device for digging hole in wall |
| CN102561405A (en) * | 2010-12-09 | 2012-07-11 | 上海市基础工程有限公司 | Opening treatment method for pipe-roofing continuous perforation |
-
2013
- 2013-05-17 CN CN201310184947.8A patent/CN103243728B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850228A (en) * | 1981-09-21 | 1983-03-24 | Ohbayashigumi Ltd | Control for ground water level in back side of sheathing wall |
| CN2861365Y (en) * | 2005-12-31 | 2007-01-24 | 中国矿业大学 | Device for digging hole in wall |
| CN102561405A (en) * | 2010-12-09 | 2012-07-11 | 上海市基础工程有限公司 | Opening treatment method for pipe-roofing continuous perforation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912003A (en) * | 2013-12-31 | 2014-07-09 | 中国人民解放军63653部队 | Method for conveniently and rapidly blocking stratum flowing water and pores |
| CN103912003B (en) * | 2013-12-31 | 2016-04-13 | 中国人民解放军63653部队 | The method of water and hole is moved on a kind of simple and efficient shutoff stratum |
| CN110670899A (en) * | 2019-10-11 | 2020-01-10 | 三门核电有限公司 | Construction method suitable for high-pressure leakage stoppage of building |
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| CN103243728B (en) | 2015-01-07 |
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