CN1201854A - Hole forming process by wall sliding of large diameter pile - Google Patents
Hole forming process by wall sliding of large diameter pile Download PDFInfo
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- CN1201854A CN1201854A CN 97112316 CN97112316A CN1201854A CN 1201854 A CN1201854 A CN 1201854A CN 97112316 CN97112316 CN 97112316 CN 97112316 A CN97112316 A CN 97112316A CN 1201854 A CN1201854 A CN 1201854A
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Abstract
A sliding-wall hole forming technology for big-diameter pile includes such technological steps as enlarging pile diameter, prefabricating slide walls and forming hole with slide walls. The pile diameter begins to be enlarged at a predefined distance to sand-running layer. The sliding wall in the shape of well casing is made up of steel plate and is inserted through the sand-running layer under the action of its dead weight and external force to form a protecting case where workers can work safely.
Description
The present invention relates to the stake that civil engineering is used, be meant a kind of hole forming process by wall sliding of large diameter pile especially.
Manual digging pile construction technology friction, noiselessness, do not disturb residents, environmentally safe; construction equipment is simple; construction technology is grasped easily; reliable in quality; cheap, but because geological conditions is intricate, therefore; manually digging hole just must have enough safeguard protections and a series of reliable measures, to guarantee construction quality and operating personnel's safety.
The conventional way of manually digging hole is whenever to dig 1.0 meters down, a cast-in-place joint annular concrete retaining wall in the hole, and wall thickness is at 100～150 millimeters, and it plays the support surrounding soil, protects constructor's safety effect in the hole.The manual digging pile construction condition is not have underground water, and soil property can keep self-support a period of time after digging 1.0 meters down and do not cave in artificial.But, tend to run into underground water in the construction, especially contain the water generates quicksand and manually digging hole can't be carried out at fine sand layer.This is hand excavated pile the biggest problem.
The object of the present invention is to provide a kind of slide wall that adopts steel plate to make the pit shaft shape, during construction, make slide wall under deadweight and external force effect, overcome native frictional force and glide, thereby pass drifting sand layer, the constructor constructs in prefabricated slide wall all the time, thereby fully solved hand excavated pile in the drifting sand layer construction, the most effective, safest hole forming process by wall sliding of large diameter pile.
Technical scheme of the present invention is achieved in that it is made up of following steps:
A. enlarge the stake footpath:
According to report of engineering geological exploration, digging preset distance to the distance drifting sand layer, begin to enlarge the stake footpath, stay construction space for the making slide wall, to mix in the retaining wall in this location in length and breadth to reinforcing bar, strengthen the intensity and the globality of retaining wall, preventing under external force (referring to jack), retaining wall is crushed or come off.
B. prefabricated slide wall: " slide wall " is a pit shaft shape works made from steel plate.
According to required slide wall size, the cylindrical shape slide wall is divided into polylith, make the circular arc calibrated bolck with steel plate on the ground, carry out bolt hole every circular arc calibrated bolck level, upper and lower lap-joint, the calibrated bolck that makes is transported in the hole, in the stake hole, horizontal lap-joint connects into standard knot with bolt between piece and the piece, joint with save between upper and lower lap-joint also be connected with bolt, all the overlap joint that is not less than 50mm to be arranged between every, also the overlap joint that is not less than 150mm to be arranged between every joint; In order to make upper and lower joint overlap joint convenient, also be when reducing the slide wall sinking simultaneously and the frictional resistance of sidewall sand, what that the steel plate slide wall was made was young, end opening is big is tubaeform, and the angle of inclination is 5～7 °, and steel plate slide wall interior diameter suitable for reading adds the allowable variation value for the intended diameter of stake; The end opening external diameter must not surpass enlarged.Every joint slide wall height decides the joint number of required slide wall generally at 1.5～1.7m according to drifting sand layer thickness.This method has not only avoided using electric welding in the hole, produce the pernicious gas threat to life; And from the time the time than precast concrete slide wall in the hole to shorten greatly
C. slide wall pore-forming:
Because steel plate slide wall dead weight is lighter, be difficult to sink by dead weight power, therefore, borrow the effect of external force, promptly apply external force by jack.Specific practice: above slide wall, establish a channel-section steel, be fixed on the retaining wall, it plays the counter-force beam action, between channel-section steel and slide wall, settle a plurality of jack, the roof pressure jack glides slide wall, and the jack rated pressure is not less than 10 tons, the employing manual pressuring is better, is beneficial to adjust at any time the size of pressure.
Slide wall overcomes the frictional force of soil and progressively glides under deadweight and external force effect, the constructor is excavation and construction in prefabricated slide wall all the time, along with cutting the earth along with exerting pressure, the friction of slide wall inwall is reduced, thereby accelerate the downslide of slide wall, along with the downslide of slide wall, can progressively increase slide wall, up to passing drifting sand layer.When the people cuts the earth in slide wall, grasp layer of sand character at any time, the quicksand direction is adjusted the method for shoveling, and observes the verticality of slide wall at any time, corrects at any time when finding deviation is arranged.
The invention has the advantages that: during construction, make slide wall under deadweight and external force effect, overcome the frictional force of soil and glide, thereby pass drifting sand layer, in prefabricated slide wall, construct all the time owing to the constructor, definitely guaranteed constructor's safety.The present invention has filled up one and has solved the blank that hand excavated pile passes the drifting sand layer problem, is applicable to and manually digs the construction of Large Diameter Pile Holes under the various complex geological conditions.
The invention will be further described to reach embodiment in conjunction with the accompanying drawings:
Fig. 1 be steel plate slide wall elevational schematic view wherein: (41) circular arc calibrated bolck, (42) bolt hole, (43) bolt
Fig. 2 is a steel plate slide wall A-A sectional drawing
Fig. 3 is that assembling steel plate slide wall and slide wall pore-forming technique figure be wherein in the stake hole: (1) retaining wall, (2) jack, (3) channel-section steel, (4) steel plate slide wall, (5) flour sand layer, (6) boulder bed
Embodiment: certain engineering area underground is the flour sand layer for 13.5 meters, and geological condition is: 0～13.5 meter is argillic horizon; 13.5～22.1 meters is flour sand layer (5), the hole of easily collapsing; 22.1 below the rice is boulder bed (6), the intended diameter of foundation pile is 1.8 meters, and hole forming process by wall sliding of large diameter pile of the present invention is adopted in long 22.5 meters of stake hole, and its step is as follows:
A. enlarge the stake footpath:
According to report of engineering geological exploration, digging to preceding 2 meters of distance flour sand layer (5), begin to enlarge the stake footpath, stay construction space for the making slide wall,
To mix Φ 8@200 * 200 (the one-level round steel that diameter is 8 millimeters in the retaining wall in this location (1), spacing is 200 * 200 millimeters) in length and breadth to reinforcing bar, strengthen the intensity and the globality of retaining wall, preventing under external force (referring to jack (2)), retaining wall (1) is crushed or come off.
B. prefabricated slide wall:
According to required slide wall size, cylindrical shape slide wall (4) is divided into 4, make circular arc calibrated bolck (41) with steel plate on the ground, carry out bolt hole (42) in every circular arc calibrated bolck (41) level, upper and lower lap-joint, the calibrated bolck that makes (41) is transported in the hole, in the stake hole, horizontal lap-joint connects into standard knot with bolt (43) between piece and the piece, joint with save between upper and lower lap-joint also use bolt (43) to be connected, all the overlap joint that is not less than 50mm to be arranged between every, also the overlap joint that is not less than 150mm will be arranged between every joint; In order to make upper and lower joint overlap joint convenient, also be when reducing slide wall (4) sinking simultaneously and the frictional resistance of sidewall sand, what that steel plate slide wall (4) was made was young, end opening is big is tubaeform, and the angle of inclination is 7 °, and steel plate slide wall interior diameter suitable for reading adds the allowable variation value for the intended diameter of stake; The end opening external diameter must not surpass enlarged.Every joint slide wall (4) height decides the joint number of required slide wall at 1.5～1.7m according to drifting sand layer thickness.
C. slide wall pore-forming:
Because steel plate slide wall dead weight is lighter, be difficult to sink by dead weight power, therefore, borrow the effect of external force, promptly apply external force by jack.Specific practice: establish a channel-section steel (3) above slide wall, be fixed on the retaining wall (1), it plays the counter-force beam action, settles two jack (2) between channel-section steel (3) and slide wall (4), and roof pressure jack (2) glides slide wall (4).Jack (2) rated pressure is not less than 10 tons, adopts manual pressuring, is beneficial to adjust at any time the size of pressure.
Slide wall overcomes the frictional force of soil and progressively glides under deadweight and external force effect, the constructor is excavation and construction in prefabricated slide wall all the time, along with cutting the earth along with exerting pressure, the friction of slide wall inwall is reduced, thereby accelerate the downslide of slide wall, along with the downslide of slide wall, can progressively increase slide wall, up to passing drifting sand layer.When the people cuts the earth in slide wall, grasp layer of sand character at any time, the quicksand direction is adjusted the method for shoveling, and observes the verticality of slide wall at any time, corrects at any time when finding deviation is arranged.
Claims (5)
1, a kind of hole forming process by wall sliding of large diameter pile is characterized in that it is made up of following steps:
A. enlarge the stake footpath:
According to report of engineering geological exploration, digging preset distance to the distance drifting sand layer, begin to enlarge the stake footpath, give and make slide wall and stay construction space;
B. prefabricated slide wall: " slide wall " is a pit shaft shape works made from steel plate;
According to required slide wall size, the cylindrical shape slide wall is divided into polylith, make the circular arc calibrated bolck with steel plate on the ground, carry out bolt hole every circular arc calibrated bolck level, upper and lower lap-joint, the calibrated bolck that makes is transported in the hole, in the stake hole, horizontal lap-joint connects into standard knot with bolt between piece and the piece, joint with save between upper and lower lap-joint also be connected with bolt;
C. slide wall pore-forming:
Establish a channel-section steel above the slide wall of making, be fixed on the retaining wall, it plays the counter-force beam action, settles a plurality of jack between channel-section steel and slide wall, and the roof pressure jack glides slide wall,
Slide wall overcomes the frictional force of soil and progressively glides under deadweight and external force effect, the constructor is excavation and construction in prefabricated slide wall all the time, along with cutting the earth along with exerting pressure, the friction of slide wall inwall is reduced, thereby accelerate the downslide of slide wall, along with the downslide of slide wall, can progressively increase slide wall, up to passing drifting sand layer.
2, slide wall pore-forming technique as claimed in claim 1 is characterized in that will mixing in length and breadth to reinforcing bar in the retaining wall.
3, slide wall pore-forming technique as claimed in claim 1, it is characterized in that the steel plate slide wall make young, that end opening is big is tubaeform, the angle of inclination is 5～7 °.
4, slide wall pore-forming technique as claimed in claim 1 is characterized in that every joint slide wall height generally at 1.5～1.7m, decides the joint number of required slide wall according to drifting sand layer thickness.
5, slide wall pore-forming technique as claimed in claim 1 is characterized in that the jack rated pressure is not less than 10 tons, adopts manual pressuring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112316 CN1081266C (en) | 1997-06-06 | 1997-06-06 | Hole forming process by wall sliding of large diameter pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112316 CN1081266C (en) | 1997-06-06 | 1997-06-06 | Hole forming process by wall sliding of large diameter pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1201854A true CN1201854A (en) | 1998-12-16 |
| CN1081266C CN1081266C (en) | 2002-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97112316 Expired - Fee Related CN1081266C (en) | 1997-06-06 | 1997-06-06 | Hole forming process by wall sliding of large diameter pile |
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| Country | Link |
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| CN (1) | CN1081266C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083771A (en) * | 2017-06-15 | 2017-08-22 | 中铁六局集团天津铁路建设有限公司 | A kind of drilling construction method of artificial digging pile |
| CN112502138A (en) * | 2020-12-07 | 2021-03-16 | 中铁上海工程局集团有限公司 | Sand drift layer protection device for manual hole digging pile and construction method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818644B (en) * | 2010-05-14 | 2011-11-30 | 北京中煤矿山工程有限公司 | Well digging process of mining vertical shaft by adopting one-drilling well completion and well drilling method |
-
1997
- 1997-06-06 CN CN 97112316 patent/CN1081266C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083771A (en) * | 2017-06-15 | 2017-08-22 | 中铁六局集团天津铁路建设有限公司 | A kind of drilling construction method of artificial digging pile |
| CN107083771B (en) * | 2017-06-15 | 2018-10-26 | 中铁六局集团天津铁路建设有限公司 | A kind of drilling construction method of artificial digging pile |
| CN112502138A (en) * | 2020-12-07 | 2021-03-16 | 中铁上海工程局集团有限公司 | Sand drift layer protection device for manual hole digging pile and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN1081266C (en) | 2002-03-20 |
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