CN102660949B - Laminated hole-sealing-type hole sealing method for preventing running water and sand blast in stiffening pile construction - Google Patents
Laminated hole-sealing-type hole sealing method for preventing running water and sand blast in stiffening pile construction Download PDFInfo
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- CN102660949B CN102660949B CN201210153408.3A CN201210153408A CN102660949B CN 102660949 B CN102660949 B CN 102660949B CN 201210153408 A CN201210153408 A CN 201210153408A CN 102660949 B CN102660949 B CN 102660949B
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Abstract
The invention discloses a laminated hole sealing method for preventing running water and sand blast in stiffening pile construction. For hole sealing at the first layer, a layer of sand blast prevention filler is filled in a guide drill hole of a waterproof curtain, the thickness of the sand blast prevention filler is less than the depth of the guide drill hole, and a drill rod and an anchoring element are sealed in a hole; for multiple times of hole sealing, during the drilling process, when water leakage appears in the drill hole, a layer of sand blast prevention filler is filled in the guide drill hole again for sealing; and if water leakage still exists in the drill hole, the sand blast prevention filler can be filled again until the drill hole is sealed. A drainage tube arranged after hole drilling can reduce pressure borne by plugging within a certain time, after the pressure can be borne completely until complete condensation of the plugging, the drainage tube is tied. The hole sealing method is simple and feasible, and controls the accidents of water running and sand blast accidents in the construction process effectively.
Description
Technical field
The present invention relates to Rock soil Foundation field of engineering technology, relate to soft rock-soil ground stabilization and supporting construction technology further, specifically relate to oblique drilling hole in a kind of stratum such as silt, sandy silt, flour sand, fine sand, gravel under high water level and prevent the construction technology of flowing water sandblasting.
Background technology
In the stratum such as the silt under high water level, sandy silt, flour sand, fine sand, gravel, reinforced by oblique drilling hole churning or stirring, or construction anchor pole, soil nailing, or grouting and reinforcing, or construct oblique anchoring pile time, usually after drilling water-stop curtain, under the effect of water pressure, there is a large amount of flowing water sandblasting phenomenons, causing being reinforced or the harm of slope supported surrounding enviroment.Along with the excavation of foundation pit degree of depth is increasing, groundwater pressure is also more and more higher, the construction difficult problem that can control oblique drilling hole blowout prevention in the urgent need to address.
Under higher hydraulic pressure effect, once drill water-stop curtain, water after water-stop curtain, soil, sand are just along the gap of drill hole wall and drilling rod, outwards extrude or spray, as do not controlled in time, then just cause the depression on stratum very soon, thus jeopardize the safety of Nearby Structure, structure and road piping, the slurries of injection are taken away by the water and soil simultaneously outflowed, thus affect supporting and consolidation effect.
At present, when water pressure is lower, adopt the construction method of little drill bit and disposable drilling rod, to reduce the gap between boring and drilling rod, can soil erosion be reduced, surrounding enviroment lower in some water pressures can require that lower ground district uses reluctantly.But this construction method still can not the effectively conservation of soil and water, and the sedimentation difficult problem on ground.When water pressure is larger, water, soil, sand and slurries are along the gap of drill hole wall and drilling rod, the pressure outwards extruded is also very large, slurries are incited somebody to action very soon with the loss of water and soil, flow is very large, the effect of slip casting or churning also just cannot ensure that, this not only jeopardizes the safety of Nearby Structure, structure and road piping very soon, and produces dangerous to constructor and construction equipment.
201010257603.1 patents of Chinese patent notice of authorization, disclose a kind of anchor rod construction method preventing the sandblasting of boring flowing water, namely be the shielding by a kind of blowout-preventing choke plug, drill bit, drilling rod, ground tackle, dowel etc. be enclosed in boring, namely they controlled in water-stop curtain.Drill hole wall on the outer rim of waterproof end plug and water-stop curtain is closely linked by fast gel material, and drilling rod enters into after water-stop curtain from waterproof end plug, thus is got up to shutoff by the passage of soil erosion in hole.But this kind of Antiseep method, only has one deck leak-proof measure, if run into the large soil property of water content, when drilling depth is darker, soil pressure hydraulic pressure is all larger, reaches ideal effect near anti-blocking being difficult to of one deck; And in drilling rod withdrawal process, because drilling rod is always in action, so still there is leakage.
Summary of the invention
Technical problem to be solved by this invention, provides the stacked method for sealing that stiffening pile in a kind of pattern foundation pit supporting structure constructs anti-flowing water sandblasting, uses the method in stiffening pile construction, effectively can avoid the accident of drill hole flowing water sandblasting.
In order to solve the problem, technical scheme of the present invention is such:
In pattern foundation pit supporting structure, stiffening pile is constructed the stacked method for sealing of anti-flowing water sandblasting, specific as follows:
1) blowout prevention filler is prepared
According to construction requirement, a certain amount of blowout prevention filler of on-the-spot preparation;
2) pilot hole
The water-stop curtain of excavation pit use drilling rod carry out pilot hole until close to pervious layer; Wherein, when being impervious layer outside the water-stop curtain at pilot hole place, then pilot hole drills water-stop curtain,
When being pervious layer outside the water-stop curtain at pilot hole place, then pilot hole does not drill water-stop curtain, and reserved certain space, prevents into water.
3) first floor sealing of hole
Water-stop curtain is inserted in the pilot hole excavated the first blowout prevention packing layer, and the thickness inserting blowout prevention packing layer is less than the degree of depth of pilot hole, and drilling rod and anchoring piece are sealed in hole;
4) anchoring piece is brought into
After the blowout prevention filler of described first blowout prevention packing layer solidifies, continue boring, in drilling process, described anchoring piece is brought into.
5) sealing boring.
Construct complete, after drilling rod described in rollback, seal described boring with blowout prevention filler or blowout plug immediately.
Further, stacked method for sealing of the present invention is further comprising the steps of:
Step 4) in pilot hole process, then insert the second blowout prevention packing layer and carry out sealing in case there is percolating water in described boring.
Further, in pilot hole process, again insert other one or more layers of blowout prevention packing layer in case there is percolating water in described boring, until seal;
Further, step 5) complete after, a drainage tube is set in the hole stayed after described drilling rod exits, after the first blowout prevention packing layer in described boring solidifies, drainage tube can be tightened sealing.
Further again, described first blowout prevention packing layer is provided with a drainage tube, after the blowout prevention filler of the described first blowout prevention packing layer in described boring solidifies completely, drainage tube is tightened sealing.
Further again, described first blowout prevention packing layer and the second blowout prevention packing layer are provided with a drainage tube, after the blowout prevention filler of the described first blowout prevention packing layer in described boring and the second blowout prevention packing layer solidifies completely, drainage tube are tightened sealing.
Further again, the second blowout prevention packing layer is provided with a drainage tube, after the blowout prevention filler of the described second blowout prevention packing layer in described boring solidifies completely, drainage tube is tightened sealing.
Described drainage tube can be one or more.
Further again, in step 5) after process in, other follow-up blowout prevention packing layer is also provided with a drainage tube.
Described drainage tube runs through a part or described whole described blowout prevention packing layer.
Further again, 3) or 4) or 5) in step for preventing drilling rod to be solidified on blowout prevention filler, drilling rod scribbles antitack agent.
Further, 3) or 4) or 5) in step for preventing drilling rod to be solidified on blowout prevention filler, drilling rod constantly rotates or front-rear reciprocation movement.
Described multiple blowout prevention packing layer can be close to mutually, and also can leave gap, hydraulic pressure progressively reduces after every layer of sealing of hole, until No leakage.
Construction method provided by the invention, takes the first blowout prevention packing layer sealing boring, makes good sealing effect, effectively prevent the flowing water sandblasting accident in stiffening pile work progress at drilling rod place.After carrying out this first sealing, the water pressure in boring outside is born primarily of the first blowout prevention packing layer, and after most of pressure is born in first sealing, remaining fraction is revealed, and its pressure diminishes greatly.Seal if almost water can be revealed completely after carrying out second sealing by the second blowout prevention packing layer again.If in particular cases the second sealing of the second blowout prevention packing layer still exists leakage, other blowout prevention packing layer sealing so can be carried out again, until seal.Like this, even if, surrounding enviroment comparatively large at ground water pressure require that higher area also can prevent flowing water sandblasting, the conservation of soil and water well, solve the sedimentation difficult problem on ground, also guarantee construction safety simultaneously.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is construction method pilot hole step schematic diagram of the present invention.
Fig. 2 is that in construction method of the present invention, more bit change carries out first sealing schematic diagram.
Fig. 3 is the schematic diagram that construction method drilling rod of the present invention is drilled through water curtain.
Fig. 4 is the schematic diagram that construction method of the present invention carries out second sealing.
Fig. 5 is the structural representation inserting an implementation method of drainage tube after construction.
Fig. 6 is the structural representation that construction method of the present invention increases another embodiment of drainage tube.
Fig. 7 is the schematic cross-section of the embodiment described in Fig. 5.
Fig. 8 is the schematic cross-section of the embodiment described in Fig. 6.
Fig. 9 is the top outside water-stop curtain boring schematic diagram when being impervious layer.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
In the present embodiment in certain pattern foundation pit supporting structure, the construction of oblique stiffening pile is example, illustrates the method for how anti-flowing water sandblasting in stiffening pile construction.
Referring to Fig. 1, foundation ditch arranged outside has water-stop curtain 1 for sealing.Stiffening pile needs through oblique the extending in the soil body from foundation pit side-wall of water-stop curtain 1.In stiffening pile construction drilling process, the water outside water-stop curtain and quicksand outwards can flow out from drill hole, if the large meeting of pressure is spouting, cause construction accident.So the method for anti-flowing water sandblasting must be taked in stiffening pile construction.
1) blowout prevention filler is modulated
According to construction requirement, modulate a certain amount of rapid solidification, blowout prevention filler that caking property is strong, generally mixed by fast setting cement and additive.This material is conventional in construction, is that market can have been bought.
2) pilot hole
On the sidewall of excavation pit, the drill bit 2 of drilling rod 3 is holed, and when being pervious layer outside water-stop curtain 1, boring does not first drill water-stop curtain 1.As shown in Figure 1, first creep into opening bit 2, in drilling process, do not drill water-stop curtain 1, retain certain thickness water-stop curtain.Drilling rod 3 rear end is the rig 4 driving drilling rod 3 to work, and the pilot hole 5 got out is now blind hole.
3) first floor sealing of hole
By preceding step 1) the blowout prevention filler that modulates, in the boring 5 of having bored of water-stop curtain 1, insert a blowout prevention filler, form the first blowout prevention packing layer 6, boring 5 is sealed, the thickness inserting blowout prevention packing layer is less than the degree of depth of pilot hole, like this, forms first sealing.
4) boring is continued
After the blowout prevention filler of the blowout prevention packing layer of boring 5 solidifies, this first seals, the first blowout prevention packing layer 6, just mainly carries the pressure of the water that major part is oozed out from blowout prevention packing layer.Then, rig 4 passes through more bit change, is arranged on drilling rod 3 by materials such as stiffening pile muscle body 9 grade such as anchoring pieces, proceeds boring, and the position of setting is drilled into through water-stop curtain, in borer drilling procedure, the stiffening pile muscle bodies 9 such as anchoring piece are brought into (referring to Fig. 2).
5) multilayer sealing of hole
In step 4) in the process of pilot hole, when still there is percolating water in boring 5, in boring 5, inserting one deck blowout prevention filler again, forming the second blowout prevention packing layer 7, boring 5 is sealed further; Certainly, if still have percolating water in boring 5, can again insert blowout prevention filler, form one or more than one other blowout prevention packing layer, until seal the non-leakage water of boring 5 completely; (referring to Fig. 4 and Fig. 5).Above-mentioned multiple blowout prevention packing layer can be close to mutually, and also can leave gap, hydraulic pressure progressively reduces after every layer of sealing of hole, until No leakage.
6) construct complete, sealing boring.
Drilling rod 3 gets into design attitude and after being brought into by the stiffening pile muscle bodies 9 such as anchoring piece, rollback drilling rod 3, after drilling rod 3 exits boring 5, the hole sealing stayed after being exited by drilling rod 3 at once, borehole sealing can adopt blowout prevention filler to insert or adopt ready stopper 15 jam-pack (see Fig. 7,8).
In addition, referring to Fig. 4, Fig. 5 and Fig. 7, in step 3) or 4) be inserted with drainage tube 8 through blowout prevention packing layer in process, in the drawings, drainage tube 8 is through the first blowout prevention packing layer 6 and the second blowout prevention packing layer 7, like this, this drainage tube 8 can be used for the watery diarrhea through blowout prevention packing layer 6,7 to go out, to prevent from destroying the blowout prevention packing layer 6,7 do not solidified completely because hydraulic pressure is excessive.Complete in subsequent construction, after the first blowout prevention packing layer 6 in hole to be drilled 5 and the second blowout prevention packing layer 7 solidify completely, drainage tube 8 can be tightened and seal.Therefore visible; the setting of drainage tube 8 of the present invention; the pressure that shutoff is born within a certain period of time can be reduced; before blowout prevention packing layer does not solidify completely; press water is gushed, plays the effect of protection blowout prevention packing layer, after blowout prevention packing layer solidifies completely and can bear pressure completely; (sealing) drainage tube 8 on bundle, has good technique effect.
In addition, drainage tube also can be arranged in the hole after reserving after drilling rod 3 exits.See Fig. 6 and Fig. 8, in above-mentioned steps 6) drilling rod 3 after construction, after exiting, the hole that reserves arranges drainage tube 8 ', watery diarrhea through blowout prevention packing layer 6,7 also can go out by this drainage tube 8 ', to prevent from destroying the blowout prevention packing layer 6,7 for solidifying completely because hydraulic pressure is excessive.After the blowout prevention filler of the blowout prevention packing layer 6,7 in hole to be drilled 5 solidifies, drainage tube 8 ' is tightened and seals.
Certainly, the blowout prevention packing layer in the multilayer sealing of hole process of above-described follow-up needs also can be inserted with drainage tube, and these drainage tubes run through part or all blowout prevention packing layer.When through part packing layer, each drainage tube can be inserted into any two blowout prevention packing layer middles from outside, drawn by the water of the leakage of middle.
According to description above, according to the size of drainage tube and the requirement of hydraulic pressure, above-mentioned drainage tube 8 or 8 ' can arrange one or more.Normally 1 to 2.
3) or 4) or 5) in step for preventing drilling rod 3 to be solidified on the blowout prevention filler of blowout prevention packing layer, antitack agent can be scribbled on drilling rod, or drilling rod 3 constantly rotates or front-rear reciprocation movement.Antitack agent a kind ofly can prevent drilling rod 3 from solidifying or adhere to a kind of preparation on blowout prevention packing layer, is that market can buy.
Step 2) in, referring to Fig. 9, there is a kind of situation, pervious layer is not in water-stop curtain outer upper, like this, drilling rod 3 through can not be very fast close to pervious layer during water-stop curtain 1, such as, soil layer outside water-stop curtain 1, be divided into two-layer up and down, upper strata is impervious layer 10, and this soil layer is not moisture, lower floor is pervious layer 11, and this soil layer is moisture.When the sidewall of excavation pit is holed, when being impervious layer near outside water-stop curtain, then pilot hole can first drill water-stop curtain 1, although because now there is no aquifer outside water-stop curtain 1, when close to lower floor's pervious layer 11, still need fill blowout prevention filler in boring 5, form one or more blowout prevention packing layer, when preventing oblique drilling hole, the hydraulic pressure of contacting hydrous layer water spray or pervious layer 11 upwards sprays.In Fig. 9, impervious layer 10 upper, pervious layer 11 under, oblique drilling hole, during through water-stop curtain 1, not contact pervious layer 11, therefore first can directly drill water-stop curtain 1.
Construction method of the present invention, takes twice at drilling rod place or repeatedly seals, good sealing effect, effectively prevents the flowing water sandblasting accident in stiffening pile work progress.After carrying out first sealing, the water pressure in boring outside mainly contains first sealing and bears, after most of pressure is born in first sealing, remaining fraction is revealed, its pressure diminishes, but, if pass water-stop curtain or run into the larger situation of hydraulic pressure under water, then could water leakage can be sealed completely after the second sealing of the second blowout prevention packing layer, therefore, water leakage almost can seal in any degree of depth all soil properties by stacked method for sealing of the present invention completely.If the setting of the second blowout prevention packing layer of the present invention is in particular cases second sealing or there is leakage, so can repeatedly seal until seal again.The drainage tube arranged after boring, can reduce the pressure that shutoff is born within a certain period of time, after shutoff is solidified can bear pressure completely completely, and drainage tube on bundle, simple and easy to do.
When the thickness of blowout prevention filler is greater than certain value, the solidifying body compactness of formation is difficult to ensure, fills leakiness, shrinks when solidifying, sealing still has hole, and leak source is through, and leakage rate is large, add multi-layer sealed after, the leakage-gap that the second layer seals for first floor, seals.Multi-layer sealed rear pressure progressively reduces.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and manual just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (13)
1. stiffening pile is constructed the stacked method for sealing of anti-flowing water sandblasting, and it is characterized in that, it comprises the following steps:
1) blowout prevention filler is prepared
According to construction requirement, a certain amount of blowout prevention filler of on-the-spot preparation;
2) pilot hole
The water-stop curtain of excavation pit use drilling rod carry out pilot hole until close to pervious layer;
3) first floor sealing of hole
Water-stop curtain is inserted in the pilot hole excavated the first blowout prevention packing layer, and the thickness inserting blowout prevention packing layer is less than the degree of depth of pilot hole, and drilling rod and anchoring piece are sealed in hole;
4) anchoring piece is brought into
After the blowout prevention filler of described first blowout prevention packing layer solidifies, continue boring, in drilling process, described anchoring piece is brought into; In boring procedure, then insert the second blowout prevention packing layer and carry out sealing in case there is percolating water in described boring;
5) sealing boring;
Construct complete, after drilling rod described in rollback, seal described boring with blowout prevention filler or blowout plug immediately.
2. method for sealing as claimed in claim 1, it is characterized in that, it is further comprising the steps of:
In step 4) pilot hole process in, again insert the blowout prevention packing layer of more than other one deck in case there is percolating water in described boring, until seal.
3. the method for sealing as described in as arbitrary in claim 1 to 2, it is characterized in that, it is further comprising the steps of:
In step 5) after, a drainage tube is set in the hole stayed after described drilling rod exits, after the first blowout prevention packing layer in described boring solidifies, drainage tube can be tightened sealing.
4. the method for sealing as described in as arbitrary in claim 1 to 2, is characterized in that, described first blowout prevention packing layer is provided with a drainage tube, after the blowout prevention filler of the described first blowout prevention packing layer in described boring solidifies completely, drainage tube is tightened sealing.
5. the method for sealing as described in as arbitrary in claim 1 to 2, it is characterized in that, described first blowout prevention packing layer and the second blowout prevention packing layer are provided with a drainage tube, after the blowout prevention filler of the described first blowout prevention packing layer in described boring and the second blowout prevention packing layer solidifies completely, drainage tube is tightened sealing.
6. the method for sealing as described in as arbitrary in claim 1 to 2, is characterized in that, described second blowout prevention packing layer is provided with a drainage tube, after the blowout prevention filler of the described second blowout prevention packing layer in described boring solidifies completely, drainage tube is tightened sealing.
7. method for sealing as claimed in claim 4, it is characterized in that, described drainage tube is more than one.
8. method for sealing as claimed in claim 5, it is characterized in that, described drainage tube is more than one.
9. method for sealing as claimed in claim 6, it is characterized in that, described drainage tube is more than one.
10. method for sealing as claimed in claim 2, it is characterized in that, other follow-up blowout prevention packing layer is also provided with a drainage tube, and described drainage tube runs through blowout prevention packing layer described in part or all.
11. as arbitrary in claim 1-2 as described in method for sealing, it is characterized in that, 3) or 4) or 5) in step for preventing drilling rod to be solidified on blowout prevention filler, drilling rod scribbles antitack agent.
12. as arbitrary in claim 1-2 as described in method for sealing, it is characterized in that, when being impervious layer outside the water-stop curtain at pilot hole place, drilling water-stop curtain close to pilot hole during pervious layer.
13. as arbitrary in claim 1-2 as described in method for sealing, it is characterized in that, when being pervious layer outside the water-stop curtain at pilot hole place, not drilling water-stop curtain close to pilot hole during pervious layer, reserved certain space, prevents into water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153408.3A CN102660949B (en) | 2012-05-16 | 2012-05-16 | Laminated hole-sealing-type hole sealing method for preventing running water and sand blast in stiffening pile construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153408.3A CN102660949B (en) | 2012-05-16 | 2012-05-16 | Laminated hole-sealing-type hole sealing method for preventing running water and sand blast in stiffening pile construction |
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| CN102660949A CN102660949A (en) | 2012-09-12 |
| CN102660949B true CN102660949B (en) | 2015-06-03 |
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| EP1041204A1 (en) * | 1999-03-30 | 2000-10-04 | Gebr. van Leeuwen Harmelen B.V. | A method for anchoring a wall in the ground by means of pull anchors |
| JP2002327436A (en) * | 2001-05-01 | 2002-11-15 | Nitto Techno Group:Kk | Compaction grouting anchor and compaction grouting anchor method |
| CN101654907A (en) * | 2009-09-11 | 2010-02-24 | 中国水利水电第九工程局有限公司 | High-flow high-speed jet plugging grouting technique under high-pressure water head of hydropower station |
| CN101705788A (en) * | 2009-08-31 | 2010-05-12 | 上海强劲基础工程有限公司 | Construction method using blowout plug to shield oblique drilling hole |
| CN101761084A (en) * | 2008-10-10 | 2010-06-30 | 上海强劲基础工程有限公司 | Method for forming anchor in shielding manner in fluidized sand layer |
| CN101942834A (en) * | 2010-08-19 | 2011-01-12 | 上海强劲基础工程有限公司 | Anchor rod construction method for preventing water from running and sand from jetting during drilling hole |
-
2012
- 2012-05-16 CN CN201210153408.3A patent/CN102660949B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1041204A1 (en) * | 1999-03-30 | 2000-10-04 | Gebr. van Leeuwen Harmelen B.V. | A method for anchoring a wall in the ground by means of pull anchors |
| JP2002327436A (en) * | 2001-05-01 | 2002-11-15 | Nitto Techno Group:Kk | Compaction grouting anchor and compaction grouting anchor method |
| CN101761084A (en) * | 2008-10-10 | 2010-06-30 | 上海强劲基础工程有限公司 | Method for forming anchor in shielding manner in fluidized sand layer |
| CN101705788A (en) * | 2009-08-31 | 2010-05-12 | 上海强劲基础工程有限公司 | Construction method using blowout plug to shield oblique drilling hole |
| CN101654907A (en) * | 2009-09-11 | 2010-02-24 | 中国水利水电第九工程局有限公司 | High-flow high-speed jet plugging grouting technique under high-pressure water head of hydropower station |
| CN101942834A (en) * | 2010-08-19 | 2011-01-12 | 上海强劲基础工程有限公司 | Anchor rod construction method for preventing water from running and sand from jetting during drilling hole |
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| CN102660949A (en) | 2012-09-12 |
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