CN103205963A - Construction method of partly recyclable steel sleeve cast-in-situ bored pile - Google Patents
Construction method of partly recyclable steel sleeve cast-in-situ bored pile Download PDFInfo
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- CN103205963A CN103205963A CN2013100820877A CN201310082087A CN103205963A CN 103205963 A CN103205963 A CN 103205963A CN 2013100820877 A CN2013100820877 A CN 2013100820877A CN 201310082087 A CN201310082087 A CN 201310082087A CN 103205963 A CN103205963 A CN 103205963A
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Abstract
The invention belongs to the field of ground foundation engineering and relates to a small disturbing construction method of a partly recyclable steel sleeve cast-in-situ bored pile. The small disturbing construction method of the partly recyclable steel sleeve cast-in-situ bored pile comprises the steps of: hardening an in-situ ground; arranging and placing a permanent steel sleeve on a steel sleeve spinning machine; pressing the permanent steel sleeve into the soil; connecting the bottom end of a recyclable steel sleeve to the top end of the permanent steel sleeve and then continuously pressing the permanent steel sleeve into the soil by spinning the recyclable steel sleeve; removing the steel sleeve spinning machine after the permanent steel sleeve and the recyclable sleeve are spun in place, and fixing the recyclable steel sleeve on the ground; extracting the soil inside the recyclable steel sleeve and the permanent steel sleeve and the soil below the recyclable steel sleeve and the permanent sleeve to perform hole-forming; placing a reinforcement cage in a formed hole in a hung mode after hole-cleaning work and pouring the formed hole with concrete; and recycling the recyclable steel sleeve. The small disturbing construction method of the partly recyclable steel sleeve cast-in-situ bored pile can greatly reduce the influence of cast-in-situ bored pile construction on short-distance subway tunnel, and the construction has good economic benefits and social benefits due to the fact that some of the steel sleeves are recyclable.
Description
Technical field
The invention belongs to the ground foundation engineering field, relate to a kind of bored pile construction method.
Background technology
Conventional holing with slurry wall protection construction process of bored concrete pile flow process is: auger is in place → boring → annotate mud → continuations to bore and dig → hole → install reinforcing cage → clear end → concreting of jetting of deslagging → clearly, this kind construction technology in pore forming process because hole wall surrounding soil stress release, the soil body more easily is subjected to displacement to the center, hole, even generation hole wall collapse or undergauge, cause the stratum loss excessive thus, when near existing subway tunnel, constructing, must cause the bigger displacement of subway tunnel and distortion, have a strong impact on the security of operation of train, and increase later stage maintenance of metro maintenance cost.
For fear of hole wall collapse or undergauge, can adopt steel sleeve to carry out retaining wall during bored pile construction, in the hole forming method of existing bored pile employing steel sleeve retaining wall shellfish promise secret service method arranged, revolve cover plumber's method and the double power head sleeve pipe long screw auger worker method etc. of digging.Shellfish promise secret service method is dug cover plumber method and is adopted percussion and grabbing method to take out the soil body in the sleeve pipe with revolving, be used for when existing subway tunnel is closely constructed, dashing the impact force of grabbing bucket existing subway tunnel is caused big disturbance, simultaneously existing tunnel is caused the secondary disturbance when preventing that sleeve pipe from extracting, steel sleeve is no longer extracted in principle, adopt above 2 kinds of worker's methods when sleeve pipe is not extracted, construction cost is very high; The steel sleeve of double power head sleeve pipe long screw auger worker method and the matching of long screw auger require high, the more preceding 2 kinds of worker Fa Genggao of cost when steel sleeve is not extracted, and the stake footpath is designed dumb; More than the steel sleeve follow-up degree of depth of 3 kinds of worker's methods identical with the depth of pore forming of bored pile, the economy of construction is very poor.Above job practices characteristics are as shown in table 1 below:
Table 1
Therefore subway tunnel closely bored pile construction be badly in need of a kind of job practices that perturbation is moving, efficiency of construction is high, construction cost is saved that has.
Summary of the invention
The objective of the invention is to provides the recyclable steel sleeve retaining wall of a kind of part bored pile construction method for the defective that overcomes prior art.
For achieving the above object, the present invention is by the following technical solutions:
Technical problem to be solved is to reduce bored pile construction clear distance is about 0.5～8m closely influence, reduction construction cost and the raising Bored Pile Construction efficient of existing subway tunnel, the recyclable steel sleeve bored pile construction of a kind of part method now is provided, by in advance permanent steel sleeve and recyclable steel sleeve being pressed into the soil body, permanent steel sleeve top exceeds the about 0.5m of vertical distance at subway tunnel top, and permanent steel bushing bottom is to 2～3m below the tunnel bottom; And carry out soil taking hole forming by the mode of mud circulation; Permanent steel sleeve is no longer extracted in the soil body, prevents the secondary effect of subway tunnel when steel sleeve is extracted; And when concreting arrives two-section steel sleeve junction, recyclable steel sleeve is screwed out, reach good economic benefit and social benefit with this.
The recyclable steel sleeve bored pile construction of a kind of part method comprises the steps:
1., before the construction, the original ground of job site is carried out the cure process of plain concrete, hardening strength reaches 70% construction again of design strength;
2., make steel sleeve spinning machinery in place, more permanent steel sleeve is placed in sleeve pipe spinning mechanically;
3., start sleeve pipe spinning machinery, permanent steel sleeve is pressed into the soil body;
4., the bottom with recyclable steel sleeve is connected with the top of permanent steel sleeve then, by the recyclable steel sleeve of spinning permanent steel sleeve is continued to be pressed into the soil body then;
5., permanent steel sleeve and recyclable steel sleeve spinning put in place after, steel sleeve spinning machinery is removed, by fastening devices recyclable steel sleeve is carried out ground and fixes, to prevent recyclable steel sleeve and the permanent downward landing of steel sleeve in the pore forming process;
6., adopt mud off direct circulation worker method with in recyclable steel sleeve and the permanent steel sleeve and the following soil body take out and carry out pore-forming;
7., to step 6. in hole carry out hole operation clearly; Again reinforcing cage is hung in step and 6. in the hole, at last pore-forming is carried out concrete perfusion (this step is identical with common bored pile construction);
8., when concrete perfusion when approaching the junction of recyclable steel sleeve and permanent steel sleeve, steel sleeve spinning machinery is retracted the position, hole again, simultaneously recyclable steel sleeve is screwed out recovery in the concrete perfusion.
Described recyclable steel sleeve bored pile construction method is used for closely (0.5～8m) subway tunnel Bored Pile Construction.
Described step 3. in, the degree of depth that permanent steel sleeve is pressed into the soil body is that the top of permanent steel sleeve is the part of spinning machinery apart from these anchor clamps of steel sleeve spinning mechanical clamp 0.2～0.5m(, the position is can relative adjustment).
Described step 4. in, it is 2～3m that the bottom of permanent steel sleeve exceeds the following distance of tunnel bottom horizontal plane, to guarantee in the pore forming process tunnel only being produced the moving influence of perturbation.
The fastening devices of described step in 4. be two rod irons that are fixed on the recyclable steel sleeve outside or two block weldings at the evagination blooms in the recyclable steel sleeve outside, fastening devices contact the acquisition stress point with ground, job site can support recyclable steel sleeve in case the whereabouts.
Described step 5. in permanent steel sleeve and recyclable steel sleeve spinning put in place refer to permanent steel sleeve the bottom to about 2～3m below the tunnel bottom.
Steel sleeve retaining wall bored pile construction is no longer extracted permanent steel sleeve, and recyclable steel sleeve is extracted again when concrete pours into and reused.
The present invention is to provide and to return steel sleeve for the part of existing subway tunnel closely and receive the moving job practices of bored pile perturbation.Among the present invention, the retaining wall steel sleeve is divided into two-section, and one is truncated into permanent steel sleeve, and one is truncated into recyclable steel sleeve, and the permanent steel sleeve of elder generation's spinning connects the two-section steel sleeve by detachable connecting device, the more recyclable steel sleeve of spinning again during construction; Be screwed into Deng the retaining wall steel sleeve and carry out soil taking hole forming with the mode of mud circulation again after putting in place; When arriving two-section steel sleeve junction, concreting more recyclable steel sleeve is screwed out.
The present invention has following beneficial effect:
1, compares boring in advance and bury the retaining wall steel sleeve again underground, reduce the stratum loss by screwing in the retaining wall steel sleeve in advance;
2, take full advantage of the retaining wall function of steel sleeve, prevented hole wall collapse and undergauge, guaranteed that bored pile construction produces the moving purpose of perturbation to subway closely;
3, when concrete pours into by the recyclable steel sleeve in top is reclaimed, reduced the consumption of steel sleeve, social benefit and economic benefit are good.
Description of drawings
Fig. 1 is the recyclable steel sleeve bored pile construction of part method flow diagram in the embodiment of the invention.
Fig. 2 is the schematic diagram that buries of permanent steel sleeve spinning in the embodiment of the invention.
Fig. 3 is recyclable steel sleeve and permanent steel sleeve connection diagram in the embodiment of the invention.
Fig. 4 is the fixing schematic diagram in recyclable steel sleeve and ground in the embodiment of the invention.
Fig. 5 is mud off direct circulation worker method soil taking hole forming schematic diagram in the embodiment of the invention.
Fig. 6 is concrete perfusion schematic diagram in the embodiment of the invention.
Fig. 7 begins to screw out recyclable steel sleeve schematic diagram when being filled into recyclable steel sleeve and permanent steel sleeve junction for concrete in the embodiment of the invention.
Fig. 8 is the structural representation after the concrete perfusion is finished in the embodiment of the invention.
Fig. 9 is permanent steel sleeve 3 and recyclable steel sleeve 2 connection diagrams.
The accompanying drawing mark:
1 steel sleeve spinning machinery, 2 recyclable steel sleeves,
3 permanent steel sleeves, 4 fastening devicess,
5 mud, 6 reinforcing cages,
6 tunnels, 7 concrete.
8 connect steel cylinder.
The specific embodiment
Further specify the present invention below in conjunction with the accompanying drawing illustrated embodiment.
Embodiment 1
High-speed railway stake plate-girder roadbed passes through from subway tunnel top, and the form of its king-pile is bored pile.
In practice of construction, permanent steel sleeve 3 is the about 1m of shield tunnel clear distance of 6.2m with diameter in the present embodiment.
As shown in Figure 1, the moving job practices of bored pile perturbation of the present invention specifically comprises the steps:
1. hardened ground: because the tunnel deformation that the deadweight of construction machinery causes, before the construction, the original ground of job site is carried out the cure process of plain concrete, when hardening strength reaches can constructing more than 70% of design strength in order to prevent in the work progress;
2. preparation of construction: as shown in Figure 2, after treating the place sclerosis, make sleeve pipe spinning machinery (1) in place, again sleeve pipe spinning machinery (1) location is placed, simultaneously, permanent steel sleeve (3) is placed on the sleeve pipe spinning machinery (1), and finishes permanent steel sleeve (3) and the centralized positioning of holing, permanent steel sleeve (3) is connected as shown in Figure 9 with recyclable steel sleeve (2).
3. after finish the location, start sleeve pipe spinning machinery (1), permanent steel sleeve (3) spinning gone into the soil body, its compression distance be permanent steel sleeve (3) the top apart from steel sleeve spinning mechanical clamp 0.2～0.5m(as shown in Figure 2);
4. then, the top with permanent steel sleeve (3), the bottom of recyclable steel sleeve (2) is connected, by the recyclable steel sleeve of spinning (2) permanent steel sleeve (3) is continued to be pressed into the soil body (as shown in Figure 3) then;
5. fix with ground after steel sleeve spinning puts in place:
As shown in Figure 4, by the recyclable steel sleeve of spinning (2) with 2～3m below the bottom water plane in bottom to the tunnel (7) of the permanent steel sleeve of the disposable spinning of permanent steel sleeve (3) (3), to guarantee that in boring procedure tunnel 7 is only produced the moving influence of perturbation.After the spinning of finishing permanent steel sleeve (3) buries, steel sleeve spinning machinery (1) is removed, for preventing permanent steel sleeve (3) landing downwards behind the pore-forming, by fastening devices (4) recyclable steel sleeve (2) and ground, job site are fixed, afterwards sleeve pipe spinning machinery (1) is moved apart the job site.Wherein fastening devices (4) specifically can be two rod irons that are fixed on steel sleeve (2) outside, also can be the evagination blooms of two block weldings outside recyclable steel sleeve (2), 4 need of fastening devices contact the acquisition stress point with ground, job site can support recyclable steel sleeve (2) in case fall;
6. soil taking hole forming: as shown in Figure 5, adopt at the construction field (site) mud off direct circulation worker method will permanent steel sleeve (3) and recyclable steel sleeve (2) in and take out with the soil body of lower part and to carry out pore-forming, wherein mud 5 is for injecting when boring excavator body;
7. as shown in Figure 6, at first hole in the previous step is carried out hole operation clearly; Afterwards reinforcing cage (6) is hung in the bottom of previous step hole, wherein the diameter of reinforcing cage (6) carries out concrete perfusion to pore-forming at last less than the diameter of steel sleeve;
8. during concrete perfusion, when concrete liquid level during near the junction of recyclable steel sleeve (2) and permanent steel sleeve (3), steel sleeve spinning machinery is retracted the position, hole again, simultaneously recyclable steel sleeve (2) is screwed out in the concrete perfusion and reclaim, as shown in Figure 7.The present invention is applicable to the closely existing subway tunnel bored pile construction of soft clay area, when bored pile construction, can reduce the influence to existing subway tunnel effectively, wherein permanent steel sleeve 3 is finally no longer extracted, avoid in withdrawal process, tunnel (7) being caused the secondary disturbance, only extract recyclable steel sleeve (2).
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (6)
1. the recyclable steel sleeve bored pile construction of a part method is characterized in that: comprise the steps:
1., before the construction, the original ground of job site is carried out the cure process of plain concrete;
2., make steel sleeve spinning machinery (1) in place, more permanent steel sleeve (3) is placed on the sleeve pipe spinning machinery (1);
3., start sleeve pipe spinning machinery (1), permanent steel sleeve (3) is pressed into the soil body;
4., the bottom with recyclable steel sleeve (2) is connected with the top of permanent steel sleeve (3) then, by the recyclable steel sleeve of spinning (2) permanent steel sleeve (3) is continued to be pressed into the soil body then;
5., permanent steel sleeve (3) and recyclable steel sleeve (2) spinning are put in place after, steel sleeve spinning machinery (1) is removed, by fastening devices (4) recyclable steel sleeve (2) is carried out ground and fix, to prevent recyclable steel sleeve (2) and the landing downwards of permanent steel sleeve (3) in the pore forming process;
6., adopt mud off direct circulation worker method that recyclable steel sleeve (2) is taken out with the interior and following soil body of permanent steel sleeve (3) and carry out pore-forming;
7., to step 6. in hole carry out hole operation clearly; Again reinforcing cage (7) is hung in step and 6. in the hole, at last pore-forming is carried out concrete perfusion;
8., when concrete perfusion when approaching the junction of recyclable steel sleeve (2) and permanent steel sleeve (3), steel sleeve spinning machinery (1) is retracted the position, hole again, simultaneously recyclable steel sleeve (2) is screwed out recovery in the concrete perfusion.
2. job practices according to claim 1 is characterized in that: described recyclable steel sleeve (1) bored pile construction method is used for the bored pile construction apart from subway tunnel 0.5～8m.
3. job practices according to claim 1 is characterized in that: described step 3. in, the degree of depth that permanent steel sleeve (3) is pressed into the soil body is that the top of permanent steel sleeve (3) is apart from the anchor clamps 0.2～0.5m of steel sleeve spinning machinery (1).
4. job practices according to claim 1 is characterized in that: described step 4. in, it is 2～3m that the bottom of permanent steel sleeve (3) exceeds the following distance of tunnel bottom horizontal plane.
5. job practices according to claim 1, it is characterized in that: the fastening devices (4) of described step in 4. be two rod irons that are fixed on recyclable steel sleeve (2) outside or two block weldings at the evagination blooms in recyclable steel sleeve (2) outside, fastening devices (4) contacts the acquisition stress point with ground, job site.
6. job practices according to claim 1 is characterized in that: described step is about 2～3m with permanent steel sleeve (3) and recyclable steel sleeve (2) spinning bottom to the vertical distance below the tunnel bottom that refers to permanent steel sleeve (3) that puts in place in 5..
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100820877A CN103205963A (en) | 2013-03-14 | 2013-03-14 | Construction method of partly recyclable steel sleeve cast-in-situ bored pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100820877A CN103205963A (en) | 2013-03-14 | 2013-03-14 | Construction method of partly recyclable steel sleeve cast-in-situ bored pile |
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| CN103205963A true CN103205963A (en) | 2013-07-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501737A (en) * | 2020-04-16 | 2020-08-07 | 中国电建集团华东勘测设计研究院有限公司 | Reinforced cast-in-situ bored pile and construction method thereof |
| CN115928742A (en) * | 2023-02-01 | 2023-04-07 | 江苏省中成建设工程总公司 | Mud dado drilling bored concrete pile construction is with hanging of preventing steel reinforcement cage deformation puts device |
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| JP4327638B2 (en) * | 2004-03-26 | 2009-09-09 | 株式会社奥村組 | Construction method of cast-in-place concrete pile |
| CN102605772A (en) * | 2012-04-05 | 2012-07-25 | 深圳市金泰建设工程有限公司 | Construction method for revolving digging cast-in-place pile |
| CN102747729A (en) * | 2012-07-13 | 2012-10-24 | 中铁二十四局集团上海铁建工程有限公司 | Sleeve connection device for bored cast-in-place pile construction |
| CN102747725A (en) * | 2012-07-13 | 2012-10-24 | 中铁二十四局集团上海铁建工程有限公司 | Bored pile construction method with tiny disturbance |
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2013
- 2013-03-14 CN CN2013100820877A patent/CN103205963A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4327638B2 (en) * | 2004-03-26 | 2009-09-09 | 株式会社奥村組 | Construction method of cast-in-place concrete pile |
| CN102605772A (en) * | 2012-04-05 | 2012-07-25 | 深圳市金泰建设工程有限公司 | Construction method for revolving digging cast-in-place pile |
| CN102747729A (en) * | 2012-07-13 | 2012-10-24 | 中铁二十四局集团上海铁建工程有限公司 | Sleeve connection device for bored cast-in-place pile construction |
| CN102747725A (en) * | 2012-07-13 | 2012-10-24 | 中铁二十四局集团上海铁建工程有限公司 | Bored pile construction method with tiny disturbance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501737A (en) * | 2020-04-16 | 2020-08-07 | 中国电建集团华东勘测设计研究院有限公司 | Reinforced cast-in-situ bored pile and construction method thereof |
| CN111501737B (en) * | 2020-04-16 | 2022-03-18 | 中国电建集团华东勘测设计研究院有限公司 | Reinforced cast-in-situ bored pile and construction method thereof |
| CN115928742A (en) * | 2023-02-01 | 2023-04-07 | 江苏省中成建设工程总公司 | Mud dado drilling bored concrete pile construction is with hanging of preventing steel reinforcement cage deformation puts device |
| CN115928742B (en) * | 2023-02-01 | 2023-08-22 | 江苏省中成建设工程总公司 | Hoisting device for preventing reinforcement cage from deforming for slurry wall-protecting bored pile construction |
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Application publication date: 20130717 |