CN102168433A - Grouting repairing method of water stopping curtain - Google Patents
Grouting repairing method of water stopping curtain Download PDFInfo
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- CN102168433A CN102168433A CN 201110070857 CN201110070857A CN102168433A CN 102168433 A CN102168433 A CN 102168433A CN 201110070857 CN201110070857 CN 201110070857 CN 201110070857 A CN201110070857 A CN 201110070857A CN 102168433 A CN102168433 A CN 102168433A
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Abstract
The invention discloses a grouting repairing method of a water stopping curtain, which comprises the following steps of: (1) measuring and labeling grouting holes, wherein the grouting holes are divided into two sequences, namely a sequence I and a sequence II, the holes of the sequence I and the holes of the sequence II are arranged transversely at equal intervals, and the holes of the sequence I and the holes of the sequence II are arranged longitudinally in rows at equal intervals; (2) grouting the holes of the sequence I: firstly drilling the holes of the sequence I, inserting shock tubes to the holes of the sequence I, then closing the holes of the sequence I and grouting by sections, and finally cleaning the tubes for later use; and (3) grouting the holes of the sequence II: firstly drilling the holes of the sequence II, inserting shock tubes to the holes of the sequence II, then closing the holes of the sequence II and grouting, and finally cleaning the tubes for later use. By the method, grouting is conducted by holes of two sequences according to the principle of grouting at intervals and densifying by sequences; the holes of the sequence I are grouted to fill the holes of the soil layer; the holes of the sequence II are grouted to crack the stratum and form a seepage-proofing curtain in the stratum; and the finally repaired curtain can effectively reduce the displacement of a foundation pit, the underground erosion of the stratum around the foundation pit, and settlement of the foundation and buildings.
Description
Technical field
The present invention relates to the water-stop curtain recovery technique.
Background technology
The design and construction of deep foundation pit support is the focus and the difficult point of current Tall Building Foundation engineering.Heavy soil-baffling structure design and construction in Foundation Pit Support Design and construction, the phenomenon of light water-stop curtain design and construction is comparatively general.The sealing Scheme Choice is improper, change arbitrarily during practice of construction former design scheme or because of not enough, inconsiderate to underground complex situations understanding, construction technology is improper, construction technology parameter selection mistake etc., all can cause water-stop curtain to lose efficacy and accidents caused, light then cause the delay of heavy economic losses and construction period, heavy then may cause casualties and bad social influence.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of water-stop curtain slip casting restorative procedure, reduced latent erosion, ground and the building settlement on drainage of foundation pit amount, foundation ditch periphery stratum effectively.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: water-stop curtain slip casting restorative procedure is characterized in that comprising the steps:
(1) measurement and mark injected hole, wherein injected hole is divided into a sequence hole and two sequence holes, and a sequence hole and two sequence holes equidistantly are provided with at interval in the horizontal, become to be listed as and spaced set respectively in a vertical sequence hole and two sequence holes;
(2) one sequence hole slip castings: subdrilling one sequence hole, insert a sequence hole floral tube, segmenting slip casting is sealed in a sequence hole then, and last pigging is standby;
(3) two sequence hole slip castings: subdrilling two sequence holes, insert two sequence hole floral tubes, two sequence holes sealing slip casting then, last pigging, standby.
Preferably, described injected hole pitch-row is got 1.5m, and hole depth is to sealing curtain bottom solum 0.5m, the thick 0.3～0.5m of grouting water-tight curtain.
Preferably, described slip casting is divided into the cement paste and the cement～water glass biliquid slurry of single liquid.
Preferably, described cement paste adopts 32.5 grades of Portland cements, and the mass ratio of water/binder ratio is 0.6: 1, and the water glass slurry transfers to 30～35Be ' with the water glass of 40～45Be '.
Preferably, look slip casting site operation situation control water glass slurry during two fluid grouting: the volume ratio of cement paste 1: 0.3～1: 1.
Preferably, slip casting adopts fracture grouting and greatest limit pressure to get 0.2～1.0Mpa.
Preferably, single liquid and two fluid grouting hocket, and the earlier rare back of single fluid grouting is thick; The biliquid slurries initial setting time is controlled at 40～80s; Annotate in the biliquid slurries process and adopt the batch (-type) grouting method, promptly stop to annotate 20～30s, allow it have slightly and carry out slip casting, repeated multiple times again after solidifying.
Slip casting of the present invention divides two preface holes to carry out by the principle that interval skip, sub-sequence are encrypted, one sequence hole slip casting is purpose with filling soil layer hole, two sequence hole slip castings are with the splitting stratum, forming seepage proof curtain in the stratum is purpose, adopt the slip casting measure of little slurry amount repeated multiple times, control aperture and splitting crack emit the slurry phenomenon.The final curtain of repairing can reduce latent erosion, ground and the building settlement on drainage of foundation pit amount, foundation ditch periphery stratum effectively.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is further described:
Fig. 1 is the present invention one sequence hole and two sequence pore size distribution schematic diagrames (wherein ⊙ represents a sequence hole, and zero represents two sequence holes).
The specific embodiment
Be illustrated as the specific embodiment of water-stop curtain slip casting restorative procedure of the present invention in conjunction with Fig. 1, comprise the steps:
(1) measurement and mark injected hole, wherein injected hole is divided into a sequence hole and two sequence holes, and a sequence hole and two sequence holes equidistantly are provided with at interval in the horizontal, become to be listed as and spaced set respectively in a vertical sequence hole and two sequence holes;
(2) one sequence hole slip castings: subdrilling one sequence hole, insert a sequence hole floral tube, segmenting slip casting is sealed in a sequence hole then, and last pigging is standby;
(3) two sequence hole slip castings: subdrilling two sequence holes, insert two sequence hole floral tubes, two sequence holes sealing slip casting then, last pigging, standby.
Wherein, select near the big location of the leakage of curtain to arrange injected hole.According to the overlapped principle of the effective range of slurries, carry out injected hole and arrange, injected hole apart from and quantity determine according to on-the-spot slip casting test, the general desirable 1.5m of pitch-row, hole depth is to sealing curtain bottom solum 0.5m, the thick about 0.3～0.5m of grouting water-tight curtain.
Adopt first sublevel fill stoping slip casting, the full hole perfusion in back hole-bottom slurry-injection mode.Grouting pressure is relevant with various factors such as slip casting speed, slip casting caliber, slip casting hole depth, soil nature parameter, slurries character and match ratios.Fracture grouting greatest limit pressure calculates by theory of passive pressure of soil usually, general desirable 0.2～1.0Mpa.
The present invention adopts cement paste and cement～silicate double solution grouting.Cement paste (S liquid) adopts 32.5 grades of Portland cements, and water/binder ratio (mass ratio) excursion is 0.6: 1, and water glass slurry (C liquid) transfers to 30～35Be ' with the water glass of 40～45Be '.Look slip casting site operation situation control C: S (volume ratio)=1: 0.3～1: 1 during two fluid grouting.
1 of main construction equipment 100m geological drilling rig, 2 in BW-250/50 type mud, 1 of pulper, pulp storage tank, quantitative water controller, grouting tube, aperture blender etc. are some.
(1) two fluid grouting slurries
The water glass consumption must be controlled with batchmeter, tests the initial setting time of slurries at the scene, and with the smooth slip casting of practical operation energy plugging not taking place is principle.
(2) slip casting ending standard
1. single liquid and two fluid grouting hocket, and the earlier rare back of single fluid grouting is thick; 2. the biliquid slurries initial setting time is controlled at 40～80s; 3. annotate in the biliquid slurries process and to adopt the batch (-type) grouting method, promptly stop to annotate 20～30s, allow it have slightly and carry out slip casting, repeated multiple times again after solidifying.4. the slip casting ending standard according to foundation ditch periphery stratum by the erosion of diving, the situation that the space is bigger, a sequence hole slip casting is purpose with cavity, the hole on filling stratum, grouting pressure＜0.05MPa when eating the slurry amount when significantly reducing, finishes single hole slip casting; It is purpose that two sequence hole slip castings form seepage proof curtain with the splitting stratum, when face of land cracking, when emitting slurry, string slurry and grouting pressure greater than 0.2MPa, finishes slip casting.
Claims (7)
1. water-stop curtain slip casting restorative procedure is characterized in that comprising the steps:
(1) measurement and mark injected hole, wherein injected hole is divided into a sequence hole and two sequence holes, and a sequence hole and two sequence holes equidistantly are provided with at interval in the horizontal, become to be listed as and spaced set respectively in a vertical sequence hole and two sequence holes;
(2) one sequence hole slip castings: subdrilling one sequence hole, insert a sequence hole floral tube, segmenting slip casting is sealed in a sequence hole then, and last pigging is standby;
(3) two sequence hole slip castings: subdrilling two sequence holes, insert two sequence hole floral tubes, two sequence holes sealing slip casting then, last pigging, standby.
2. water-stop curtain slip casting restorative procedure according to claim 1 is characterized in that: described injected hole pitch-row is got 1.5m, and hole depth is to sealing curtain bottom solum 0.5m, the thick 0.3～0.5m of grouting water-tight curtain.
3. water-stop curtain slip casting restorative procedure according to claim 1 is characterized in that: described slip casting is divided into the cement paste and the cement～water glass biliquid slurry of single liquid.
4. water-stop curtain slip casting restorative procedure according to claim 3 is characterized in that: described cement paste adopts 32.5 grades of Portland cements, and the mass ratio of water/binder ratio is 0.6: 1, and the water glass slurry transfers to 30～35Be ' with the water glass of 40～45Be '.
5. water-stop curtain slip casting restorative procedure according to claim 4 is characterized in that: look slip casting site operation situation control water glass slurry during two fluid grouting: the volume ratio of cement paste 1: 0.3～1: 1.
6. water-stop curtain slip casting restorative procedure according to claim 1 is characterized in that: slip casting adopts fracture grouting and greatest limit pressure to get 0.2～1.0Mpa.
7. water-stop curtain slip casting restorative procedure according to claim 5, it is characterized in that: single liquid and two fluid grouting hocket, and the earlier rare back of single fluid grouting is thick; The biliquid slurries initial setting time is controlled at 40～80s; Annotate in the biliquid slurries process and adopt the batch (-type) grouting method, promptly stop to annotate 20～30s, allow it have slightly and carry out slip casting, repeated multiple times again after solidifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070857 CN102168433A (en) | 2011-03-23 | 2011-03-23 | Grouting repairing method of water stopping curtain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070857 CN102168433A (en) | 2011-03-23 | 2011-03-23 | Grouting repairing method of water stopping curtain |
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| CN102168433A true CN102168433A (en) | 2011-08-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837118A (en) * | 2016-04-05 | 2016-08-10 | 中建三局集团有限公司 | Environmentally-friendly flexible self-healing waterproof curtain and production method thereof |
| CN107035389A (en) * | 2017-06-01 | 2017-08-11 | 新疆北新路桥集团股份有限公司 | A kind of construction method for grouting reinforcement and earth's surface construction method |
| CN107795021A (en) * | 2016-08-30 | 2018-03-13 | 盛世安泰建筑工程（北京）有限公司 | Minimally invasive leak stopping system and its construction technology |
| CN108643919A (en) * | 2018-04-03 | 2018-10-12 | 上海隧道工程有限公司 | The method that loess cement mixing slurries reinforce loose pebble layer |
| CN108825264A (en) * | 2018-05-30 | 2018-11-16 | 中煤科工集团西安研究院有限公司 | A kind of curtain-grouting method in the closely horizontal burnt rock water-bearing layer of shallow embedding |
| CN110804917A (en) * | 2019-09-26 | 2020-02-18 | 中国一冶集团有限公司 | Construction method of pressure grouting boundary curtain |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638987A (en) * | 2009-07-24 | 2010-02-03 | 中铁二十一局集团有限公司 | Tunnel construction method for crossing high-pressure water-enriched fracture zone with curtain grouting and grout stopping wall |
| CN101832142A (en) * | 2010-02-11 | 2010-09-15 | 中铁十二局集团有限公司 | Tunnel information tracing accurate grouting method |
-
2011
- 2011-03-23 CN CN 201110070857 patent/CN102168433A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638987A (en) * | 2009-07-24 | 2010-02-03 | 中铁二十一局集团有限公司 | Tunnel construction method for crossing high-pressure water-enriched fracture zone with curtain grouting and grout stopping wall |
| CN101832142A (en) * | 2010-02-11 | 2010-09-15 | 中铁十二局集团有限公司 | Tunnel information tracing accurate grouting method |
Non-Patent Citations (1)
| Title |
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| 《施工技术》 20080118 段仲沅 某基坑失效止水帷幕的注浆修复技术 63-65 1-7 第37卷, 第1期 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837118A (en) * | 2016-04-05 | 2016-08-10 | 中建三局集团有限公司 | Environmentally-friendly flexible self-healing waterproof curtain and production method thereof |
| CN105837118B (en) * | 2016-04-05 | 2018-06-26 | 中建三局集团有限公司 | A kind of environment-friendly type self-repairing flexible closes water-stop curtain and preparation method thereof |
| CN107795021A (en) * | 2016-08-30 | 2018-03-13 | 盛世安泰建筑工程（北京）有限公司 | Minimally invasive leak stopping system and its construction technology |
| CN107035389A (en) * | 2017-06-01 | 2017-08-11 | 新疆北新路桥集团股份有限公司 | A kind of construction method for grouting reinforcement and earth's surface construction method |
| CN108643919A (en) * | 2018-04-03 | 2018-10-12 | 上海隧道工程有限公司 | The method that loess cement mixing slurries reinforce loose pebble layer |
| CN108825264A (en) * | 2018-05-30 | 2018-11-16 | 中煤科工集团西安研究院有限公司 | A kind of curtain-grouting method in the closely horizontal burnt rock water-bearing layer of shallow embedding |
| CN110804917A (en) * | 2019-09-26 | 2020-02-18 | 中国一冶集团有限公司 | Construction method of pressure grouting boundary curtain |
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Application publication date: 20110831 |