CN102704473A - Steel bar implanting construction method of manual hole digging pile in quicksand layer - Google Patents
Steel bar implanting construction method of manual hole digging pile in quicksand layer Download PDFInfo
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- CN102704473A CN102704473A CN2012101804453A CN201210180445A CN102704473A CN 102704473 A CN102704473 A CN 102704473A CN 2012101804453 A CN2012101804453 A CN 2012101804453A CN 201210180445 A CN201210180445 A CN 201210180445A CN 102704473 A CN102704473 A CN 102704473A
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Abstract
The invention provides a steel bar implanting construction method of a manual hole digging pile in a quicksand layer. The steel bar implanting construction method comprises the following steps of: in the event of digging to the upper part of the quicksand layer close to the quicksand layer, implanting a layer of anchor bars with a certain length into the quicksand layer around the inner wall of a pile hole so as to reinforce the quicksand layer along the bottom angle of a current digging line firstly, pouring a protective wall at the upper layer of the quicksand layer, and pouring the upper ends of the anchor bars in the protective wall in the event of pouring; then, downwardly digging the quicksand layer, implanting a second layer of anchor bars into the quicksand layer and pouring the protective wall after digging at a certain depth, and circularly constructing in such a manner till passing through the quicksand layer. According to the invention, normal and safe hole digging operations of pile foundations including the quicksand layer can be ensured; furthermore, the steel bar implanting construction method has the advantages of low cost and high construction efficiency and can be applied to treatment of construction of bridge pile foundations in the event of meeting geological disasters, such as quicksand layers, sludge layers, karst regions and the like.
Description
Technical field
The excavation method in stake hole when the present invention relates to the construction of a kind of bridge pile foundation, especially under geological conditionss such as molten chamber with drift sand formation, mud, karst area, the borehole method when adopting manually digging hole.
Background technology
In bridge pile foundation manually digging hole work progress, for preventing hole wall collapse, every usually certain depth of excavation downwards will be built one deck concrete guard wall on the inwall of stake hole.But run into drift sand formation through regular meeting in the borehole process, because drift sand formation is more open, common retaining wall can't be built, and caves in easily even built also, and normal borehole construction can't be carried out, and also causes security incident easily.
To the borehole construction of geological conditions, generally adopt the high-pressure slip-casting method that drift sand formation is reinforced at present with drift sand formation.The high-pressure slip-casting method is around the stake hole, to pass drift sand formation from surface drilling; Then from boring down spray of molten steel pipe (steel pipe around be drilled with some apertures) carry out slip casting; Make the drift sand formation around the stake hole be consolidated into a closely knit integral body, thereby guarantee borehole safety work in proper working order.Obviously, adopt the high-pressure slip-casting method, need equipment more, cost is also higher, and long in time limit, influences construction speed.
Summary of the invention
The object of the present invention is to provide a kind of to drift sand formation geological conditions pile foundation borehole job practices down, geological disaster is effectively prevented with shutoff in, can improve the borehole efficiency of construction, the saving cost.
Technical scheme of the present invention is following:
Hand excavated pile drift sand formation pore reinforced construction method is characterized in that, may further comprise the steps:
When (1) excavate in the stake hole, every certain depth of excavation downwards, inwall is built one deck concrete guard wall around the stake hole;
When (2) excavating drift sand formation top near drift sand formation; Not carrying out earlier the retaining wall on drift sand formation upper strata builds; Elder generation is along the base angle of current excavation line; Inwall is implanted the first floor dowel of certain-length to drift sand formation around the stake hole, and dowel is with the outward-dipping implantation drift sand formation in certain inclination angle, and externally reserves certain-length;
(3) after the first floor bar planting is accomplished, build the retaining wall on drift sand formation upper strata, when building the outside reserved part of first floor dowel is cast in this layer retaining wall;
(4) excavate drift sand formation then downwards; Excavate certain depth; Make the first floor dowel keep certain length and still be embedded in the drift sand formation, remainder exposes hole wall, adopts this moment the described bar planting method of step (2) to implant second layer dowel to drift sand formation again; And (3) described retaining wall casting method set by step, build the drift sand formation retaining wall;
(5) continue excavation drift sand formation downwards, every excavation certain depth, described bar planting of repeating step (4) and retaining wall casting method are until passing through drift sand formation.
Further, said method also comprises following technical characterictic:
The said dowel of implanting to drift sand formation is the inwall dense arrangement around the stake hole;
Described dowel is a reinforcing bar, or is the steel plate of width less than 15cm;
Dowel to drift sand formation is implanted is implanted through the bar planting hammer, and described bar planting hammer is to cut the tip of air compressor machine drill rod to put down to become tack, and the steel pipe that on drill rod tack, welds 30-50mm is processed; When the dowel of implanting is steel plate, cut out the seam of width at bar planting hammer steel tube end part along diameter of steel tube than the big 4mm of steel plate thickness, clamp steel plate when being used for bar planting;
The dado thickness of building at drift sand formation is greater than the dado thickness of drift sand formation.
The present invention is through implanting reinforcing bar or steel plate to drift sand formation; Form firm retaining wall thereby build; Can guarantee the normal safety work of borehole operation; Cost is lower, and efficiency of construction at present other method want high, the processing when running into the geological disasters such as molten chamber of drift sand formation, mud, karst area applicable to the bridge pile foundation construction.
Description of drawings
Fig. 1 is construction process figure of the present invention
Fig. 2 is the geologic structure sketch map that contains drift sand formation
Fig. 3 is non-drift sand formation stake hole excavation and retaining wall view
Fig. 4 is to the method sketch map of drift sand formation bar planting when digging near drift sand formation
Fig. 5 is the stake hole section plan after the drift sand formation bar planting
Fig. 6 is the partial enlarged drawing of Fig. 5
Fig. 7 is the structural representation of bar planting hammer
Fig. 8 is the view after drift sand formation upper strata retaining wall is built
Fig. 9 is the view of excavation drift sand formation co-current flow sand bed bar planting
Figure 10 is the view after the drift sand formation retaining wall is built completion
The specific embodiment
Shown in Figure 1 is flow chart of the present invention, may further comprise the steps:
(1) excavate the non-drift sand formation that begins in the stake hole, carry out normal borehole construction, every certain depth of excavation downwards, inwall is built one deck concrete guard wall around the stake hole;
When (2) excavating drift sand formation top near drift sand formation; Not carrying out earlier the retaining wall on drift sand formation upper strata builds; Elder generation is along the base angle of current excavation line; Inwall is implanted the first floor dowel of certain-length to drift sand formation around the stake hole, and dowel is with the outward-dipping implantation drift sand formation in certain inclination angle, and externally reserves certain-length;
(3) after the first floor bar planting is accomplished, build the retaining wall on drift sand formation upper strata, when building the outside reserved part of dowel is cast in this layer retaining wall;
(4) excavate drift sand formation then downwards; Excavate certain depth; Make the first floor dowel keep certain length and still be embedded in the drift sand formation, remainder exposes hole wall, adopts this moment the described bar planting method of step (2) to implant second layer dowel to drift sand formation again; And (3) described retaining wall casting method set by step, build the drift sand formation retaining wall;
(5) circulation construction continues excavation drift sand formation downwards, every excavation certain depth, and described bar planting of repeating step (4) and retaining wall casting method are until passing through drift sand formation.
When getting into the non-drift sand formation in bottom, continue by normal stake hole excavation and the construction of retaining wall casting method through drift sand formation.
Below in conjunction with accompanying drawing, and through specific embodiment, to further explain of the present invention.
Shown in Figure 2 is a kind of geologic structure sketch map that contains drift sand formation, and top is soil layer 1 or rock stratum, and the middle part is a drift sand formation 2, and the bottom still is soil layer or lithosphere.
When beginning to carry out hole excavation, upper soil horizon 1 is constructed by common manually digging hole mode, and every excavation certain depth is built one deck concrete guard wall 3 on the stake hole wall, as shown in Figure 3.
As shown in Figure 4, when digging drift sand formation top, do not build earlier the retaining wall on drift sand formation top near drift sand formation 2, along the base angle of current excavation line, inwall is implanted into the first floor dowel 4 of certain-length to drift sand formation 2 around the stake hole earlier.The dowel of implanting 4 is a reinforcing bar, or is the steel plate of width less than 15cm.Dowel 4 most of implantation in the drift sand formation 2, but certain-length will be reserved in the outside.
Dowel 4 should be implanted drift sand formation to stake hole wall outer incline with certain angle of inclination.As a kind of preferred embodiment, this angle of inclination can be between 5 ° to 10 °.Certainly, be 3 ° to 5 ° like the inclination angle, or less than this angular range, as 10 ° to 15 °, the inventive method still can realize greater than this angular range.
The length of dowel 4 is suitably confirmed according to the height of every layer of retaining wall 3, but its length should be greater than the retaining wall height.When every layer of retaining wall was higher, dowel will suitably extend, and when the retaining wall height was low, dowel length can suitably shorten.As a kind of specific embodiment, when the retaining wall height was the 90-100cm left and right sides, dowel length can be 130cm, implanted drift sand formation 115cm, the outside 15cm that reserves.
The dowel of implanting to drift sand formation is the inwall dense arrangement around the stake hole.Behind drift sand formation implantation dowel shown in Figure 5, the section plan in stake hole.Fig. 6 is the enlarged drawing of A portion among Fig. 5, can be more clearly visible the arrangement architecture of implanting dowel 4.
Dowel 4 is implanted through bar planting hammer 5.The structural member of described bar planting hammer 5 is shown in Figure 7, can adopt following method to process: cut the tip of the air compressor machine drill rod 51 of usefulness usually flat, become tack, and on drill rod tack, weld the steel pipe 52 of 30-50mm; During bar planting, be reinforcing bar like the dowel of implanting, then a section with reinforcing bar inserts in the steel pipe, and the reinforcing bar other end is inserted in the drift sand, starts air engine reinforcing bar is implanted in the drift sand.Like what implant is steel plate, then can cut out the seam of width than the big 4mm of steel plate thickness along diameter of steel tube at steel tube end part, clamps steel plate when being used for bar planting.Above-mentioned air compressor machine is claimed pneumatic pick again, is a kind of existing hand-held pneumatic tools, and front end is provided with drill rod, and its operating principle is to promote reciprocating motion of the pistons with compressed air, and drill rod is constantly clashed into, construction field such as be widely used in mining, build the road.
After the 4 bar planting work of first floor dowel are accomplished, build the retaining wall on drift sand formation top again, must dowel 4 be reserved in outside part when building and be poured in the retaining wall, see shown in Figure 8ly, some is cast in the retaining wall 3 can to see dowel 4.
See shown in Figure 9, the retaining wall on drift sand formation top build 3 accomplish after, the excavation of beginning drift sand formation 2; Excavation is controlled at certain depth; The dowel that makes a part implant drift sand formation exposes hole wall, and keeps the dowel of certain-length still to be embedded in the drift sand formation, as in the present embodiment; The dowel length of exposing hole wall is 80cm, and keeping the length that is embedded in part in the drift sand formation is 35cm.The part of dowel 4 this moment through fixing in part fixing in the retaining wall of drift sand formation upper strata and the bottom drift sand formation forms one and supports the advance anchor bolt in the similar tunnel temporarily.Stop excavation this moment,, be implanted into second layer dowel 6 to drift sand formation by above-mentioned bar planting method.
6 bar plantings of second layer dowel are built drift sand formation retaining wall 7 by above-mentioned retaining wall casting method after accomplishing.Firm for guaranteeing the drift sand formation retaining wall, the thickness of drift sand formation retaining wall 7 is greater than the thickness of non-drift sand formation retaining wall 3.Shown in figure 10.
By above-mentioned drift sand formation excavation, bar planting, build the flow process of retaining wall, the circulation construction is until passing through drift sand formation.When getting into the non-drift sand formation in bottom, continue by common stake hole excavation and the construction of retaining wall casting method.
Claims (10)
1. hand excavated pile drift sand formation pore reinforced construction method is characterized in that, may further comprise the steps:
When (1) excavate in the stake hole, every certain depth of excavation downwards, inwall is built one deck concrete guard wall around the stake hole;
When (2) excavating drift sand formation top near drift sand formation; Not carrying out earlier the retaining wall on drift sand formation upper strata builds; Elder generation is along the base angle of current excavation line; Inwall is implanted the first floor dowel of certain-length to drift sand formation around the stake hole, and dowel is with the outward-dipping implantation drift sand formation in certain inclination angle, and externally reserves certain-length;
(3) after the first floor bar planting is accomplished, build the retaining wall on drift sand formation upper strata, when building the outside reserved part of first floor dowel is cast in this layer retaining wall;
(4) excavate drift sand formation then downwards; Excavate certain depth; Make the first floor dowel keep certain length and still be embedded in the drift sand formation, remainder exposes hole wall, adopts this moment the described bar planting method of step (2) to implant second layer dowel to drift sand formation again; And (3) described retaining wall casting method set by step, build the drift sand formation retaining wall;
(5) continue excavation drift sand formation downwards, every excavation certain depth, described bar planting of repeating step (4) and retaining wall casting method are until passing through drift sand formation.
2. method according to claim 1 is characterized in that: the dowel of implanting to drift sand formation is the inwall dense arrangement around the stake hole.
3. method according to claim 1 is characterized in that: described dowel is a reinforcing bar.
4. method according to claim 1 is characterized in that: described dowel is the steel plate of width less than 15cm.
5. method according to claim 3 is characterized in that: the dowel to drift sand formation is implanted is implanted through the bar planting hammer, and described bar planting hammer is to cut the tip of air compressor machine drill rod to put down to become tack, and the steel pipe that on drill rod tack, welds 30-50mm is processed.
6. method according to claim 4 is characterized in that: the dowel to drift sand formation is implanted is implanted through the bar planting hammer, and described bar planting hammer is to cut the tip of air compressor machine drill rod to put down to become tack, and the steel pipe of welding 30-50mm is processed on drill rod tack; Cut out the seam of width at steel tube end part along diameter of steel tube, clamp steel plate when being used for bar planting than the big 4mm of steel plate thickness.
7. method according to claim 1 is characterized in that: in the said step (2), dowel is with the outward-dipping implantation drift sand formation in 5 ° to 10 ° inclination angle.
8. method according to claim 1 is characterized in that: in the said step (2), the length of dowel is 130cm, implants drift sand formation 115cm, the outside 15CM that reserves.
9. method according to claim 8 is characterized in that: in the said step (4), when excavating drift sand formation downwards, the dowel length of exposing hole wall is 80cm, and the dowel length that keeps being embedded in the drift sand formation is 35cm.
10. method according to claim 1 is characterized in that: the thickness of drift sand formation retaining wall is greater than the thickness of non-drift sand formation retaining wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101804453A CN102704473A (en) | 2012-06-03 | 2012-06-03 | Steel bar implanting construction method of manual hole digging pile in quicksand layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101804453A CN102704473A (en) | 2012-06-03 | 2012-06-03 | Steel bar implanting construction method of manual hole digging pile in quicksand layer |
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| CN102704473A true CN102704473A (en) | 2012-10-03 |
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| CN2012101804453A Pending CN102704473A (en) | 2012-06-03 | 2012-06-03 | Steel bar implanting construction method of manual hole digging pile in quicksand layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155518A (en) * | 2015-09-01 | 2015-12-16 | 中国十七冶集团有限公司 | Safe pile-forming construction method for manual hole digging pile in quicksand lot |
| CN109518684A (en) * | 2018-11-15 | 2019-03-26 | 五冶集团上海有限公司 | A kind of artificial digging pile drift sand formation steel pipe dado reinforced construction method |
Citations (4)
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|---|---|---|---|---|
| JPH11256572A (en) * | 1998-03-09 | 1999-09-21 | Odakyu Construction Co Ltd | Composite ground reinforcing method |
| JP2003278151A (en) * | 2002-03-25 | 2003-10-02 | Taisei Corp | Driving method for steel sheet-pile |
| CN101397797A (en) * | 2008-09-26 | 2009-04-01 | 中冶建工有限公司 | Construction method of shifting sand layer pile foundation breast wall |
| CN101691751B (en) * | 2009-08-31 | 2011-05-18 | 中建三局第三建设工程有限责任公司 | Construction method for making ultra-long artificial excavating pile penetrate cave and ultra-long pile penetrating cave |
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2012
- 2012-06-03 CN CN2012101804453A patent/CN102704473A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11256572A (en) * | 1998-03-09 | 1999-09-21 | Odakyu Construction Co Ltd | Composite ground reinforcing method |
| JP2003278151A (en) * | 2002-03-25 | 2003-10-02 | Taisei Corp | Driving method for steel sheet-pile |
| CN101397797A (en) * | 2008-09-26 | 2009-04-01 | 中冶建工有限公司 | Construction method of shifting sand layer pile foundation breast wall |
| CN101691751B (en) * | 2009-08-31 | 2011-05-18 | 中建三局第三建设工程有限责任公司 | Construction method for making ultra-long artificial excavating pile penetrate cave and ultra-long pile penetrating cave |
Non-Patent Citations (2)
| Title |
|---|
| 叶新明: "超长人工挖孔桩施工方法", 《湖南城建高等专科学校学报》, vol. 12, no. 02, 30 June 2003 (2003-06-30) * |
| 林伟: "溶洞区域人工挖孔桩施工方法", 《广东建材》, no. 9, 20 September 2008 (2008-09-20), pages 103 - 105 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155518A (en) * | 2015-09-01 | 2015-12-16 | 中国十七冶集团有限公司 | Safe pile-forming construction method for manual hole digging pile in quicksand lot |
| CN109518684A (en) * | 2018-11-15 | 2019-03-26 | 五冶集团上海有限公司 | A kind of artificial digging pile drift sand formation steel pipe dado reinforced construction method |
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Application publication date: 20121003 |