CN101713198B - Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain - Google Patents
Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain Download PDFInfo
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- CN101713198B CN101713198B CN2009102283790A CN200910228379A CN101713198B CN 101713198 B CN101713198 B CN 101713198B CN 2009102283790 A CN2009102283790 A CN 2009102283790A CN 200910228379 A CN200910228379 A CN 200910228379A CN 101713198 B CN101713198 B CN 101713198B
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Abstract
The invention discloses a method and equipment for repairing flaws of clamped sand, splits and defect sites of an underground building curtain, and relates to a construction method and auxiliary equipment of an underground engineering. The method can substitute the method for repairing the flaws of the clamped sand, the splits and the defect sites of the curtain in a foundation pit by the method of jet grouting piles and dual-liquid grouting, is not limited by an operating space, does not need to refill a soil mass, and has the characteristics of simple, convenient and feasible operation, high reliability, high accuracy, construction time conservation and minimum risk. A grouting hammer comprising a curtain air pick hammer and an air pick strikes one row or a plurality of rows of grouting pipes below the soil mass of a curtain flaw part in the foundation pit; a grouter grouts a nano waterproof cement paste or water glass into the grouting pipes comprising slurry delivering pipes, slurry outlet pipes, pile heads and grouting nozzles; and the nano waterproof cement paste or the water glass passes through slurry outlets and then contacts and solidifies with other neighbouring grouting pipes in the soil mass to form an additional curtain. The curtain repairs the flaws of the clamped sand, the splits and the defect sites of the underground building foundation pit curtain and is convenient for continuous construction.
Description
Technical field:
The present invention relates to a kind of job practices of underground construction and supporting equipment.Particularly a kind of method and apparatus of repairing underground building curtain folder sand, split and vacant defective.
Background technology:
At building field, the development and utilization of the underground space has been universal gesture.
In the area of rich groundwater,, before excavation pit, at first should carry out underground curtain for ensureing the needs of construction.The effect of underground curtain is in order to stop the Chung that leaks with silt to go out.Underground curtain has been carried out, and just can the soil body in the curtain be excavated, thereby digs out foundation ditch, cleans out the space of underground construction, ensures finishing of building body.
Underground curtain has polytypes such as ground-connecting-wall, piling wall.Because these curtains all are can not be underground intuitively, finish by relevant plant equipment, so leave over engineering defect easily.These defectives only just can reveal in the process of excavation.
Wherein the most difficult repairing, seam folder sand, split and vacant defective that dangerous maximum defective is body of wall, pile body.At this position, when being excavated to certain degree of depth, just having water and go out from underground Chung, also carry a large amount of silt sometimes secretly.Meet this situation and must stop excavation, and organize shutoff immediately.Attempt fully exposes defective by thorough excavation, and then the idea of row shutoff is breakneck and infeasible, and Chung water, drift sand are aggravated, and excavation can't carry out.On the other hand, soil body constraint loses, the dangerous situation of bigger Chung water, Chung sand can occur, caving in, and other buildings and constructor's the personal safety outward of entail dangers to building itself, curtain causes more great loss when serious.
Repairing the most traditional way of this defective is to tamp earlier, holes outside curtain again, does for supplement rotary churning pile, and carries out " biliquid " grouting of cement and water glass bi-component.After treating that Chung water and mobile silt are by the shutoff success, excavate once more.
But, when excavating once more also new dangerous situation may appear once more.Main cause is, presses and surpasses more than the 20m if foundation ditch is crossed deep water, and then the pile body of rotary churning pile is difficult to the location, also is difficult for fullly, and the rejected region of curtain is difficult to seal exactly closely knit; If it is just occupied for silt again that these can't seal closely knit position, " biliquid " also can't replace these silts and fill by grouting so.Be subjected to phreatic erosion,, the dangerous situation of Chung water and drift sand still also can occur when excavating this position.
Occur dangerous situation when avoiding excavating once more once more, the way of being promoted gradually at present is again in foundation ditch inside to do one rotary churning pile and the " biliquid " reinforcing of grouting more.Do like this, just equaled inside and outside curtain, to add simultaneously the new additional curtain in two roads,, just can avoid dangerous situation as long as wherein there is together additional curtain to work.Reduced the probability that dangerous situation takes place widely.
Problem is, in curtain, do in rotary churning pile and the two-shot grouting, to the soil body of foundation ditch down boring exist very big risk.Because the position of boring, be that foundation ditch inside is under the water level again, so during boring, if run into the defective that does not have to repair good curtain just, under the effect of hydraulic pressure, Chung water and drift sand can be emerged once more by boring, if at this moment soil layer is thinner so, be not enough to Chung water is formed constraint, so also can form dangerous situation.For fear of the generation of this dangerous situation, only before boring, carry out a large amount of backfills, to increase the constraint of the soil body to Chung water in foundation ditch inside.But do like this and increased workload, increased the time and the cost of backfill and excavation.The soil body of backfill simultaneously is too thick, has increased again to occur when doing for supplement rotary churning pile that " sideslip is " with inaccurate probability.In addition, the equipment of doing for supplement rotary churning pile is relatively heavier, huge, in the foundation ditch interior construction, also often is subjected to the restriction of surrounding environment.
Summary of the invention:
The present invention aims to provide a kind of method and apparatus of repairing underground building curtain folder sand, split and vacant defective.It can substitute with the method for rotary churning pile and " biliquid " grouting and curtain in the foundation ditch be pressed from both sides the method for repairing and mending of sand, split and vacant defective, and this method has and not limited by the operating space, easy to operation, without the backfill soil body, good reliability, the accuracy height is saved the engineering time, and risk can drop to minimum characteristics.
The present invention comprises grouting hammer, grout pipe, grout nipple, grouting machine about repairing underground building curtain folder sand, split and vacant defective device therefor.
Described grouting hammer comprises pneumatic pick, curtain pneumatic pick hammer and pile crown; Pneumatic pick is its power source; Curtain pneumatic pick hammer comprises hammer tail, hammer body and tup; The hammer tail of its upper end is connected with the lead-out terminal of pneumatic pick and is provided with locking device; The tup of its lower end is pullover for the tubulose that is made of outer tube and inner core; Pile crown is that the lower end has externally threaded steel pipe; The external diameter of pile crown is less than the outer tube diameter of tup, and the internal diameter of pile crown is greater than the inner core external diameter of tup; Hammer connects hammer tail and tup as the taper cylinder; Pneumatic pick is connected with the hammer tail locking of curtain pneumatic pick hammer, and the tup of curtain pneumatic pick hammer and pile crown are socketed into the grouting hammer.
Wherein, the locking device of hammer tail can be a Spring lock catch.
Described grout pipe comprises many feed pipe for mortar, many outlet pipes and tip; Feed pipe for mortar is that two ends have external screw thread, the steel pipe of the pile crown coupling of diameter and grouting hammer, and many feed pipe for mortar can connect successively with pipe collar; Outlet pipe is that two ends have external screw thread, the steel pipe of diameter and feed pipe for mortar coupling on its pipe outer wall, is uniform-distribution with a plurality of horizontal annular protrusions, be provided with a plurality of grout outlets and be with rubber film between annular protrusion, many outlet pipes can connect successively with pipe collar; Tip is that the upper end has external screw thread, diameter and outlet pipe coupling, and the lower end is the steel pipe of conical pointed stake; Outlet pipe, the tip of the feed pipe for mortar of Lian Jieing, connection successively can connect into grout pipe with pipe collar successively successively.
The diameter of described feed pipe for mortar, outlet pipe, length, quantity can be selected according to the requirement of construction, connect the posterior end successively and tip connects into grout pipe.
Described grout nipple is the sebific duct that two ends have interface;
Described grouting machine is the grouting machine that the patented technology of patent No. CN200720097456.X relates to.
The present invention is to construct additional curtain about the method for repairing underground building curtain folder sand, split and vacant defective;
One, in the underground building curtain inboard grout pipe array is set
1, select grout pipe array construction location;
The grout pipe array is the vertically parallel grout pipe of row several an or number row ordered series of numbers of being driven underground; The construction location of grout pipe array is chosen in the foundation ditch of underground building curtain inboard, above the rejected region that folder sand, split and omission occur;
2, the length of selection grout pipe;
Can meet and exceed the fault location that folder sand, split and omission occur with grout pipe, and can the depth H of water burst and drift sand formation constraint be as the criterion, select the quantity n of feed pipe for mortar
1, outlet pipe quantity n2 and the length h1 of feed pipe for mortar, the length h2 of outlet pipe; Be n
1* h1+n2 * h2=H;
3, the constructing of grout pipe array;
The lower end of nethermost outlet pipe is connected with tip with pipe collar, its upper end is connected with pipe collar with the lower end of pile crown; With tup and the pile crown upper end socket that the curtain pneumatic pick of grouting hammer is hammered into shape, make the pipe outer wall outside of the outer tube sleeve of tup in the pile crown upper end, the inner core of tup inserts in the inside pipe wall of pile crown; With the hammer tail of curtain pneumatic pick hammer with after the terminal locking of pneumatic pick is connected, the startup pneumatic pick; With the impact force of pneumatic pick tup and the pile crown by curtain pneumatic pick hammer, the outlet pipe that the lower end is had tip is to soil body hammering, and squeezes into into the soil body; After treating that first outlet pipe all enters the soil body, with pipe wrench pile crown is taken off, length according to set grout pipe, Using such method connect again one or more outlet pipe and hammer go into underground after, connect again one or more feed pipe for mortar and hammer go into underground after, take off pile crown, the grout pipe that is made of many feed pipe for mortar, many outlet pipes and tip promptly is squeezed into repairs the underground degree of depth that the curtain defective requires;
The parallel vertical hammer of several grout pipes is gone into underground, about the about 5-10cm of the spacing of every grout pipe, the array that formation is made of grout pipe;
Two, grouting
1, grout nipple is connected with the upper end of feed pipe for mortar, grout nipple, many feed pipe for mortar, many outlet pipes and tip are fused;
2, use two grouting machines to be connected with two adjacent grout nipples simultaneously, water-proof nanometer cement slurry or water glass are passed through adjacent grout nipple respectively, feed pipe for mortar is clamp-oned adjacent outlet pipe, and being forced into the highest pressure, water-proof nanometer cement slurry or water glass are clamp-oned the outlet pipe soil body on every side by the grout outlet of outlet pipe;
3, successively all grout pipes in the array are filled with, treat that water-proof nanometer cement slurry and water glass fully solidify after, the position of curtain defective is built into additional curtain in foundation ditch.
Additional constructing of curtain repaired the position of curtain defective in the foundation ditch, and foundation ditch just can continue excavation.
When constructed additional curtain causes encroachment line to foundation ditch, can be when continuing excavation pit, the limit excavation, the exposed water-proof nanometer cement slurry and the solidifying body of water glass are rejected in the limit, and cut off the steel pipe that exposes the soil body with the electrogas welding layering, when defective exposes, promptly adopt conventional way to carry out shutoff, promptly can guarantee the continuation excavation of foundation ditch.
The water-proof nanometer cement that the patented technology that water-proof nanometer cement slurry of the present invention is patent No. CN20041007189.8 relates to.
The present invention has following good effect in use:
Because what the present invention injected the soil body respectively by adjacent grout pipe is water-proof nanometer cement slurry or water glass, the water-proof nanometer cement slurry is got together mutually with coagulating agent water glass and is solidified apace.Solidifying body is under the promotion of grouting machine pressure, can produce extruding to the soil body around the outlet pipe, make the soil body " splitting " and displacement, it is the cement pile body at center with the grouting steel pipe that the position after the displacement is solidified formation that body is filled, and then is the soil body after the densification around the cement pile body.
Owing to be distributed with grout outlet equably on the outlet pipe tube wall of grout pipe of the present invention, when one of them grout outlet is stopped up by solidifying body, when grouting pressure can not overcome its resistance, water-proof nanometer cement slurry or water glass also can be extruded from other grout outlet, form new solidifying body, having sealed all grout outlets until solidifying body, and when no longer including path and can extrude, is that the cement pile body in axle center has also just formed by grout pipe.Because the distance between the grout pipe is very near, so the cement pile body between each grout pipe is easy to " interlock " mutually, the mutual interlock of these cement pile bodies has just constituted additional curtain body of wall, promptly additional curtain.
The grouting machine that matches with above-mentioned technology can produce the squeeze pressure more than the 30Mpa, the water-proof nanometer cement that utilizes this equipment to make to extrude or the slurry of water glass very easily squeeze the soil body around the grout pipe and open, densification or splitting among a small circle, make between the grout pipe to join together, form additional curtain.
Because the present invention adopts water-proof nanometer cement slurry and water glass to be in the milk, its speed that is in contact with one another after coagulation is exceedingly fast, so when having avoided using the two-shot grouting of traditional ordinary Portland cement and water glass, because setting rate is slow, produce " splitting " and " branches and tendrils " shape on a large scale, and disadvantage that can not pile.
Because grout pipe of the present invention comprises feed pipe for mortar, outlet pipe, each assembly of tip, therefore scene merogenesis assembling immediately, is not limited by the operating space during construction, easy to operation.
Because the present invention squeezes into the soil body by the grouting hammer with grout pipe, rather than the slotting pipeline of grouting that buries of the method that adopts boring, therefore, when running into Chung water and drift sand, although outlet pipe is provided with grout outlet, but be covered with rubber membrane on the grout outlet, make that grout outlet can only pulp, Chung water and drift sand can not flow backwards and emerge once more by grout outlet, also do not exist soil body boring to emit the problem of water, when therefore constructing without the backfill soil body, has good reliability, the accuracy height is saved the engineering time, and risk can drop to minimum characteristics.
Because grouting hammer of the present invention passes to feed pipe for mortar to impact force by pile crown, pile crown becomes the consumable accessory of the power of withstanding shocks, thereby has reduced feed pipe for mortar because of directly bearing the damage of hammering; And the replacing of pile crown is fairly simple, and cost is lower, has reduced the cost of engineering.
In sum, the present invention is a kind of method and apparatus of repairing underground building curtain folder sand, split and vacant defective.It can substitute with the method for rotary churning pile and " biliquid " grouting and curtain in the foundation ditch be pressed from both sides the method for repairing and mending of sand, split and vacant defective, this method has and not limited by the operating space, easy to operation, without the backfill soil body, good reliability, the accuracy height is saved the engineering time, and risk can drop to minimum characteristics.
Description of drawings:
The additional curtain generalized section that Fig. 1 forms in foundation ditch for the present invention.
The additional curtain schematic top plan view that Fig. 2 forms in foundation ditch for the present invention.
The additional curtain schematic diagram that Fig. 3 forms for the present invention.
Fig. 4 is the grout pipe schematic diagram.
Fig. 5 is grouting hammer schematic diagram.
Fig. 6 is grouting hammer and grout pipe working state schematic representation.
Fig. 7 is the grouting process working state schematic representation.
1-does not excavate the soil body, 2-curtain, 3-curtain defective, the position that 4-has excavated, 5-grout pipe, 6-adds curtain, 7-feed pipe for mortar, 8-outlet pipe, 9-tip, 10-grout nipple,, 11-circular protrusion, 12-grout outlet, 13-rubber film, 14-external screw thread, the 15-hammer that is in the milk, 16-pneumatic pick, 17-curtain pneumatic pick hammer, 18-tup, 19-hammers tail into shape, and 20-hammers body, 21-pile crown, 22-locking device into shape, the 23-grouting machine, 24-outer tube, 25-inner core, 26-pipe collar.
The specific embodiment:
The embodiment of the invention:
The underground curtain 2 of certain key project, excavation absolute altitude-29m.Wherein-be little artesian aquifer below the 21m, the powder sandy soil.Hydraulic pressure 0.4MPa.For preventing to go wrong, all doed for supplement rotary churning pile in the medial and lateral of curtain 2 before the excavation and carried out " biliquid " grouting at this position.But when the position 4 of having excavated during to-25m, because curtain defective 3, the dangerous situation of Chung water and drift sand has appearred.At that time, stopped immediately excavating and having organized and tamped and shutoff, tamped to the 23m place.
After the shutoff success, use way of the present invention, rejected region is reinforced once more.
The equipment that adopts comprises grouting hammer 15, grout pipe 5, grout nipple 10, grouting machine 22.
One, in the underground building curtain inboard grout pipe array is set
The construction location of grout pipe 5 arrays is chosen in the foundation ditch of underground building curtain inboard, and the degree of depth occurs at-25m that folder is husky, split and vacant rejected region;
Select the quantity n of feed pipe for mortar 7
1=5, the quantity n2=2 root of outlet pipe 8; The length h1=1m of every feed pipe for mortar 7, the length h2=1m of every outlet pipe 8; Be H=7m;
The external screw thread 14 of the lower end of first outlet pipe 8 is connected with pipe collar 26 with the external screw thread 14 of tip 9 upper ends, the external screw thread 14 of outlet pipe 8 upper ends is connected with pipe collar 26 equally with the external screw thread 14 of the lower end of pile crown 21;
The tup 18 of the curtain pneumatic pick hammer 17 of grouting hammer 15 is connected with pile crown 21 upper ends, the outer tube 24 of tup 18 is enclosed within outside the pipe outer wall of pile crown 21 upper ends, in the inside pipe wall of the inner core 25 insertion pile crowns 21 of tup 18;
With the hammer tail 19 of curtain pneumatic pick hammer 17 with after the terminal locking of pneumatic pick 16 is connected, startup pneumatic pick 16; The impact force of pneumatic pick 16 is the tup 18 hammering pile crowns 21 by curtain pneumatic pick hammer 17 then, and the outlet pipe 8 that the lower end is had tip 9 is to soil body hammering, and extruding enters near the soil body curtain defective 3 positions.
After treating that first outlet pipe 8 all enters the soil body, with pipe wrench pile crown 21 is taken off, with pipe collar first outlet pipe, 8 upper external screw threads 14 are connected with second outlet pipe, 8 lower end external screw threads 14 again, hammer go into underground after, connect 5 feed pipe for mortar 7 and hammer more successively and go into undergroundly, 8,5 feed pipe for mortar 7 of 2 outlet pipes are connected hammering afterwards successively, are squeezed in the foundation ditch-the 7m place; And occur that folder is husky, the degree of depth of split and vacant fault location is in the foundation ditch-5m, the degree of depth that outlet pipe 8 arrives surpasses and occurs that folder is husky, split and vacant fault location 2m;
5 grout pipes 5 are hammered into shape respectively go into undergroundly, about the about 5-10cm of the spacing of every grout pipe 5, form and to constitute plum blossom shape array by grout pipe 5;
Two, grouting
The upper end of grout nipple 10 with feed pipe for mortar 7 is connected, 7,2 outlet pipes 8 of 10,5 feed pipe for mortar of grout nipple and tip 9 are fused.
Use two grouting machines 22 to be connected respectively with two grout nipples 10 simultaneously, water-proof nanometer cement and water glass slurry are passed through two grout nipples 10 respectively, feed pipe for mortar 7 is clamp-oned outlet pipe 8, and be forced into the highest pressure, make water-proof nanometer cement slurry and water glass clamp-on the soil body on every side by the grout outlet 12 of two adjacent outlet pipes 8 respectively;
Successively 5 grout pipes 5 in the array are filled with, water-proof nanometer cement slurry and water glass rapid solidification, after treating that it fully solidifies, it is the additional curtain 6 in axle center that this position is formed with grout pipe 5, simultaneously and the soil body at this position is carried out densification handle, repaired that underground building pit curtain folder is husky, split and vacant defective.
Two, the repairing of defective
When being excavated to absolute altitude position-29m, the defective shutoff of underground curtain is good, and the cured layer that water-proof nanometer cement after solidifying and water glass and grout pipe 5 form is very firm.
Claims (4)
1. an equipment of repairing underground building curtain folder sand, split and vacant defective is characterized in that it comprises pneumatic pick, curtain pneumatic pick hammer and pile crown; Pneumatic pick is its power source; Curtain pneumatic pick hammer comprises hammer tail, hammer body and tup; The hammer tail of its upper end is connected with the lead-out terminal of pneumatic pick and is provided with locking device; The tup of its lower end is pullover for the tubulose that is made of outer tube and inner core; Pile crown is that the lower end has externally threaded steel pipe; The external diameter of pile crown is less than the outer tube diameter of tup, and the internal diameter of pile crown is greater than the inner core external diameter of tup; Hammer connects hammer tail and tup as the taper cylinder; Pneumatic pick is connected with the hammer tail locking of curtain pneumatic pick hammer, and the tup of curtain pneumatic pick hammer and pile crown are socketed into the grouting hammer.
2. according to the described a kind of equipment of repairing underground building curtain folder sand, split and vacant defective of claim 1, it is characterized in that the hammer tail locking device of curtain pneumatic pick hammer is a Spring lock catch.
One kind repair that underground building curtain folder is husky, the equipment of split and vacant defective, it is characterized in that it is a grout pipe, comprise many feed pipe for mortar, many outlet pipes and tip; Feed pipe for mortar is that two ends have external screw thread, the steel pipe of the described grouting hammer of diameter and claim 1 coupling, and many feed pipe for mortar can connect successively with pipe collar; Outlet pipe is that two ends have external screw thread, the steel pipe of diameter and feed pipe for mortar coupling on its pipe outer wall, is uniform-distribution with a plurality of horizontal annular protrusions, be provided with a plurality of grout outlets and be with rubber film between annular protrusion, many outlet pipes can connect successively with pipe collar; Tip is that the upper end has external screw thread, diameter and outlet pipe coupling, and the lower end is the steel pipe of conical pointed stake; Outlet pipe, the tip of the feed pipe for mortar of Lian Jieing, connection successively can connect into grout pipe with pipe collar successively successively.
4. one kind is used claim 1,3 described equipment to repair the method that underground building curtain presss from both sides sand, split and vacant defective, it is characterized in that it is to repair underground building curtain folder sand, split and vacant defective to construct additional curtain, and its method is:
One, in the underground building curtain inboard grout pipe array is set
1. select grout pipe array construction location;
The grout pipe array is the vertically parallel grout pipe of row several an or number row ordered series of numbers of being driven underground; The construction location of grout pipe array is chosen in the foundation ditch of underground building curtain inboard, above the rejected region that folder sand, split and omission occur;
2. select the length of grout pipe;
Can meet and exceed the fault location that folder sand, split and omission occur with grout pipe, and can the depth H of water burst and drift sand formation constraint be as the criterion, select quantity n1, quantity n2 and the length h1 of feed pipe for mortar, the length h2 of outlet pipe of outlet pipe of feed pipe for mortar; Be n1 * h1+n2 * h2=H;
3. the grout pipe array constructs;
The lower end of nethermost outlet pipe is connected with tip with pipe collar, its upper end is connected with pipe collar with the lower end of pile crown; With tup and the pile crown upper end socket that the curtain pneumatic pick of grouting hammer is hammered into shape, make the pipe outer wall outside of the outer tube sleeve of tup in the pile crown upper end, the inner core of tup inserts in the inside pipe wall of pile crown; With the hammer tail of curtain pneumatic pick hammer with after the terminal locking of pneumatic pick is connected, the startup pneumatic pick; With the impact force of pneumatic pick tup and the pile crown by curtain pneumatic pick hammer, the outlet pipe that the lower end is had tip is to soil body hammering, and squeezes into into the soil body; After treating that first outlet pipe all enters the soil body, with pipe wrench pile crown is taken off, length according to set grout pipe, Using such method connect again one or more outlet pipe and hammer go into underground after, connect again one or more feed pipe for mortar and hammer go into underground after, take off pile crown, the grout pipe that is made of many feed pipe for mortar, many outlet pipes and tip promptly is squeezed into repairs the underground degree of depth that the curtain defective requires;
The parallel vertical hammer of several grout pipes is gone into underground, about the about 5-10cm of the spacing of every grout pipe, the array that formation is made of grout pipe;
Two, grouting
1. grout nipple is connected with the upper end of feed pipe for mortar, grout nipple, many feed pipe for mortar, many outlet pipes and tip are fused;
2. use two grouting machines to be connected with two adjacent grout nipples simultaneously, water-proof nanometer cement slurry or water glass are passed through adjacent grout nipple respectively, feed pipe for mortar is clamp-oned adjacent outlet pipe, and being forced into the highest pressure, water-proof nanometer cement slurry or water glass are clamp-oned the outlet pipe soil body on every side by the grout outlet of outlet pipe;
3. successively all grout pipes in the array are filled with, treat that water-proof nanometer cement slurry and water glass fully solidify after, the position of curtain defective is built into additional curtain in foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102283790A CN101713198B (en) | 2009-11-20 | 2009-11-20 | Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102283790A CN101713198B (en) | 2009-11-20 | 2009-11-20 | Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101713198A CN101713198A (en) | 2010-05-26 |
| CN101713198B true CN101713198B (en) | 2011-06-22 |
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ID=42417160
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102283790A Expired - Fee Related CN101713198B (en) | 2009-11-20 | 2009-11-20 | Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain |
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| CN (1) | CN101713198B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174135B (en) * | 2011-12-23 | 2015-06-03 | 五冶集团上海有限公司 | Repair method of unqualified post-grouting bored concrete pile |
| CN105442536A (en) * | 2015-12-31 | 2016-03-30 | 卢兴耐 | Rectangular pile and H pile trapezoidal latch equipment |
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