CN103628500B - Continuous wall trench underground construction method in Fu Shui circle gravel stratum - Google Patents
Continuous wall trench underground construction method in Fu Shui circle gravel stratum Download PDFInfo
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- CN103628500B CN103628500B CN201310567874.0A CN201310567874A CN103628500B CN 103628500 B CN103628500 B CN 103628500B CN 201310567874 A CN201310567874 A CN 201310567874A CN 103628500 B CN103628500 B CN 103628500B
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Abstract
The invention discloses continuous wall trench underground construction method in Fu Shui circle gravel stratum, comprise the following steps, determining hole position in groove section; Impact drill jet-bedding is utilized to draw hole; To be drawn in hole toward groove by mud circulating system and inject mud; Punching groove draws hole, makes groove draw hole and penetrates gravel layer; Utilize grab chute forming.The present invention, by continuous wall trench underground construction in Fu Shui circle gravel stratum, improves rich water round gravel stratomere grooving efficiency and effectively reduces in work progress and may occur the phenomenon such as collapse hole, spillage, ensure that construction quality, reduce construction risk.
Description
Technical field
The present invention relates to a kind of continuous wall construction method, particularly relate to continuous wall trench underground construction method in a kind of rich water circle gravel stratum.
Background technology
Thicker gravel layer is generally distributed with in In Southwest China (as Nanning, Chengdu etc.) some places, if Nanning City's gravel layer is based on grey, folder brown, taupe, saturated, degree of rounding is good, and based on circle ~ secondary circle, the granule content that particle diameter is greater than 2mm accounts for 50 ~ 76%, medium coarse sand filling is mainly between skeleton particle, seldom see clay, main component is quartz, flint, is secondly siltstone, sandstone, silicalite, silty etc., compactness based in close shape, local partially slightly close shape.Varied in thickness is comparatively large, and buried depth of top surface is generally 6 ~ 18.00m, and thickness is generally 6.00 ~ 16.00m.The thickest in 20m.
Gravel layer due to its change of size comparatively large, grating is poor, is mainly medium coarse sand filling, seldom sees clay, there is hole more between skeleton particle.Add that some areas have artesian water, transmission coefficient is comparatively large, and according to geologic report, in gravel layer, transmission coefficient is 67.09m/d, and be highly permeable, gravel layer easily caves in continuous wall trench underground process, and grooving difficulty will strengthen further.Gravel layer denser, directly gravel layer can not be captured with grab bucket during construction of diaphragm wall, again due to its relative loose, not as rock entirety has fragility, rock mode can not be entered with impact drill and carry out pore-forming, impact drill hits to gravel layer with gravity, impact force dissipates very fast, and punch on cotton as one, gravel layer can rush more closely knit and more closely knit, drilling depth is very slow, and efficiency is very low.
Summary of the invention
Object of the present invention, is to provide continuous wall trench underground construction method in a kind of rich water circle gravel stratum.
The solution that the present invention solves its technical problem is: continuous wall trench underground construction method in Fu Shui circle gravel stratum, comprises the following steps,
1), determining hole position in groove section;
2) impact drill jet-bedding is utilized to draw hole;
3), to be drawn in hole toward groove by mud circulating system and inject mud;
4), punching groove draws hole, makes groove draw hole and penetrates gravel layer;
5) grab chute forming is utilized.
As the further improvement of technique scheme, described groove draws hole and is evenly distributed in groove section, and adjacent 3 grooves total spacing of drawing between hole is less than or equal to the working size of grab bucket.
As the further improvement of technique scheme, in same groove section, arrange two impact drills, described impact drill is constructed simultaneously.
As the further improvement of technique scheme, in step 3), the bentonite clay material in described mud adopts sodium bentonite.
As the further improvement of technique scheme, in step 4), when impacting gravel layer, backfill clay.
As the further improvement of technique scheme, in the process of impacting gravel layer, often rush in the clay of 0.5 meter of backfill 1m3.
The invention has the beneficial effects as follows: the present invention is by continuous wall trench underground construction in Fu Shui circle gravel stratum, improve rich water round gravel stratomere grooving efficiency to effectively reduce in work progress and may occur the phenomenon such as collapse hole, spillage, ensure that construction quality, reduce construction risk.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention, instead of whole embodiment, and those skilled in the art, under the prerequisite not paying creative work, can also obtain other design schemes and accompanying drawing according to these accompanying drawings.
Fig. 1 is that the groove in the present invention draws the uniform schematic diagram in hole;
Fig. 2 is that in the present invention, punching groove draws hole, backfill mud construction schematic diagram;
Fig. 3 is stratum reset condition figure in the present invention;
Fig. 4 participates in sodium bentonite mud and the soil body produces qualitative change in the present invention, form slurry coat method schematic diagram;
Fig. 5 backfills clay to increase circle gravel stratum mud film thickness schematic diagram in the present invention.
Detailed description of the invention
Be clearly and completely described below with reference to embodiment and the accompanying drawing technique effect to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.Obviously; described embodiment is a part of embodiment of the present invention, instead of whole embodiment, based on embodiments of the invention; other embodiments that those skilled in the art obtains under the prerequisite not paying creative work, all belong to the scope of protection of the invention.In addition, all connection/annexations mentioned in literary composition, not singly refer to that component directly connects, and refer to and according to concrete performance, can connect auxiliary by adding or reducing, and form more excellent draw bail.
With reference to Fig. 1 ~ Fig. 5, continuous wall trench underground construction method in water circle gravel stratum, comprises the following steps,
1), determining hole position in groove section;
2) impact drill jet-bedding is utilized to draw hole 1;
3), injection mud 2 in hole 1 is drawn by mud circulating system toward groove;
4), punching groove draws hole 1, makes groove draw hole 1 and penetrates gravel layer 3;
5) grab chute forming is utilized.
Be further used as preferred embodiment, described groove draws hole 1 and is evenly distributed in groove section, and adjacent 3 grooves total spacing of drawing between hole 1 is less than or equal to the working size of grab bucket.Impact drill is at interval of 1 meter and 3 hole spacing must not be greater than the working size of grab bucket, with satisfied grab bucket construction.Generally, grab bucket is preferably hydraulic grab.
Be further used as preferred embodiment, in same groove section, arrange two impact drills, described impact drill is constructed simultaneously, effectively shortens operation alt time.
Be further used as preferred embodiment, in step 3), the bentonite clay material in described mud 2 adopts sodium bentonite.This mud is made up of sodium bentonite and heavy polymer, additive.Its retaining wall mechanism is, polymer molecule is in the absorption cementation of flute wall surfaces, and the mud skin be jointly made up of polymer and bentonite clay particle is to the cementation of cell wall, and the basic match ratio of fresh mud sees the following form:
Be further used as preferred embodiment, in step 4), when utilizing block stamp 4 to impact gravel layer 3, backfill clay 5, effectively improves mud film thickness, ensures construction safety, and reduces construction risk.
Below one embodiment of the present of invention:
Protolith soil main physico-mechanical parameter sees the following form:
Seen the following form by circle gravel formation parameter after above working measure:
Be further used as preferred embodiment, in the process of impacting gravel layer 3, often rush in the clay 5 of 0.5 meter of backfill 1m3.Retaining wall effect can be judged according to concentration of hydraulic mixture and sediment thickness after impact drill punching, mud index is higher by being diluted with water, mud index is on the low side, can backfill clay 5 and form retaining wall mud film by the enough viscosity mud of impact drill repeated stock manufacture.
When formation condition allows, the clay 5 of backfill can extract on the spot in foundation pit construction region, on-the-spot extract clay 5 can reduce operation alternately, environment pollution etc. is unfavorable for engineering manufacturing schedule and civilized construction phenomenon.
More than that better embodiment of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modifications or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (4)
1. continuous wall trench underground construction method in rich water circle gravel stratum, is characterized in that: comprise the following steps,
1), determining hole position in groove section;
2) impact drill jet-bedding is utilized to draw hole;
3), to be drawn in hole toward groove by mud circulating system and inject mud;
4), punching groove draws hole, makes groove draw hole and penetrates gravel layer, in the process of impacting gravel layer, often rushes in the clay of 0.5 meter of backfill 1m3;
5) grab chute forming is utilized.
2. continuous wall trench underground construction method in rich water circle gravel stratum according to claim 1, it is characterized in that: described groove draws hole and is evenly distributed in groove section, adjacent 3 grooves total spacing of drawing between hole is less than or equal to the working size of grab bucket.
3. continuous wall trench underground construction method in rich water circle gravel stratum according to claim 1, is characterized in that: in same groove section, arrange two impact drills, described impact drill is constructed simultaneously.
4. continuous wall trench underground construction method in rich water circle gravel stratum according to claim 1, it is characterized in that: in step 3), the bentonite clay material in described mud adopts sodium bentonite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567874.0A CN103628500B (en) | 2013-11-14 | 2013-11-14 | Continuous wall trench underground construction method in Fu Shui circle gravel stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310567874.0A CN103628500B (en) | 2013-11-14 | 2013-11-14 | Continuous wall trench underground construction method in Fu Shui circle gravel stratum |
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| Publication Number | Publication Date |
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| CN103628500A CN103628500A (en) | 2014-03-12 |
| CN103628500B true CN103628500B (en) | 2015-12-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350569A (en) * | 2015-09-24 | 2016-02-24 | 中国水利水电第七工程局成都水电建设工程有限公司 | Diaphragm wall parallel drilling method grooving process |
| CN106381865B (en) * | 2016-08-31 | 2019-04-02 | 徐州徐工基础工程机械有限公司 | A kind of brill milling combination engineering method applied to hard rock grooving |
| CN107059976B (en) * | 2017-04-21 | 2018-01-05 | 中国水电基础局有限公司 | A kind of slotted eye backfills grasping means |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TW200934931A (en) * | 2008-02-01 | 2009-08-16 | Yi-Zhi Lu | Construction method for treating inferior concrete of diaphragm wall |
| CN101324070A (en) * | 2008-07-31 | 2008-12-17 | 中冶集团武勘岩土基础工程公司 | Underground continuous wall forming groove plane set-hammer construction process and apparatus |
| CN101586340A (en) * | 2009-06-17 | 2009-11-25 | 广州市第二市政工程有限公司 | Preconditioning process of continuous wall for weak weathering terrane grooving construction |
| CN102561361A (en) * | 2012-03-05 | 2012-07-11 | 中交第四航务工程局有限公司 | Ultra-deep T-shaped trench-wall pile in soft-toped hard-bottomed soil layer and trench forming method |
| CN102797252B (en) * | 2012-09-13 | 2014-06-11 | 中铁十二局集团第七工程有限公司 | Construction method of underground continuous walls |
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Address after: 510220 Guangdong city of Guangzhou province Haizhuqu District Yue Xuan Street No. 81 (G-3) 1501-1512, 1604-1607 room Patentee after: Guangdong Hua Qiao construction group Limited by Share Ltd Address before: 9, building 510620, industrial building, 101 Tianhe Road, Guangzhou, Guangdong, Tianhe District Patentee before: China Tunnel Construction Co., Ltd. Guangdong |
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