CN202925575U - Pre-buried structure for core-drilling detection of foundation pile - Google Patents
Pre-buried structure for core-drilling detection of foundation pile Download PDFInfo
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- CN202925575U CN202925575U CN 201220583173 CN201220583173U CN202925575U CN 202925575 U CN202925575 U CN 202925575U CN 201220583173 CN201220583173 CN 201220583173 CN 201220583173 U CN201220583173 U CN 201220583173U CN 202925575 U CN202925575 U CN 202925575U
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Abstract
The utility model relates to the technical field of core-drilling detection of foundation piles and discloses a pre-buried structure for core-drilling detection of a foundation pile. The foundation pile is arranged in a deep foundation pit, and the top end of the foundation pile extends to the bottom of the foundation pit. The foundation pile is constructed from the ground before the foundation pit is excavated, and the vertical segment from the top end to the ground is a hollow pile segment. The pre-buried structure comprises a hollow casing, wherein the bottom end of the hollow casing is mounted in the foundation pile and the top end thereof extends onto the ground, and the hollow casing is straight strip-shaped. Compared with the prior art, the bottom end of the hollow casing is directly inserted into the foundation pile and is straight strip-shaped and the top end of the hollow casing extends onto the ground, so that during the core-drilling detection of the foundation pile, the drilling operation is directly performed along the hollow casing to avoid the problem that the drill-core is deviated from the foundation pile and can not reach the bottom and to save the construction cost.
Description
Technical field
The utility model relates to foundation pile and bores the technical field that core detects, and relates in particular to for foundation pile and bores the pre-buried structure that core detects.
Background technology
The building deep foundation adopts bored concrete pile foundation usually, according to the difference of pile-formation process, can be divided into manually digging hole filling pile basis, brill (punching) hole pouring pile basis and revolve types such as scraping out the hole pouring pile basis.Single pile in pile foundation is called foundation pile, in order to guarantee the quality of bored concrete pile foundation, must carry out quality examination to each foundation pile in the castinplace pile foundation pile, common detection method has multiple, core drilling method is a kind of effective quality determining method comparatively commonly used, the diameter of being examined foundation pile should not be less than 800mm, and the ratio of foundation pile length and diameter (being called draw ratio) should not be greater than 30.
Be arranged in that mud is deep, weathering～gentle breeze rock mass buries the high-rise building in dark sea reclamation area, the design and construction technique of Deep Foundation Pit Supporting Project, pile foundation engineering all faces many difficult problems.Deep Foundation Pit Supporting Project generally adopts diaphragm wall and inner support combined supporting structure, or the supporting and protection structure of campshed (or interlocking pile) and inner support associating.When deep foundation ditch is provided with horizontal inner support system, and the place rock-soil layer is when being not suitable for adopting the manually digging hole filling pile basis, and the pile foundation of building adopts brills (punching) hole pouring pile basic usually.
Aspect sequence of construction, because the clear distance between descending at the bottom of the horizontal inner support in road and foundation ditch most is limited, stake machine pylon is high, can't bore the foundation construction of (punching) hole pouring pile in the foundation ditch bottom.The construction of (punching) hole pouring pile be should first bore on ground, then pit earthwork excavation and the construction of horizontal inner support system carried out.There is following characteristics in the arrangement of this sequence of construction: (1) is positioned at below foundation ditch bottom because of the design of pile top elevation, and the top of foundation pile is longer apart from the empty pile length between ground; (2) because being subjected to the impact of ground pile position deviation and vertical degree of the peg hole deviation, the foundation pile position deviation that actual foundation pile position and design can appear in excavation of foundation pit on earth afterwards is larger; (3) need be seated in middle weathering～gentle breeze rock mass for end bearing pile or friction end bearing pile, because of in weathering～gentle breeze rock mass bury deeply, the effective length of the foundation pile of bored concrete pile foundation is longer, becomes to grow or super long pile.
In prior art, in the boring method context of detection, be generally excavation of foundation pit on earth after, the foundation pile top excavation of bored concrete pile foundation is exposed, then set up rig in foundation ditch, drilling equipment should be installed firmly, the base level makes rig vertical shaft center, head sheave center with the center, aperture on same plumb line, should guarantee that rig is in boring the process of core to foundation pile, not run-off the straight, displacement, boring core hole perpendicularity deviation should be greater than 0.5%.
In above-mentioned detection method, because the top of the foundation pile that designs is buried at below ground, the aspect is not bored core and is detected operation, detect operation if just bore core before pit earthwork excavation and the construction of horizontal inner support, so the most direct way is when building the foundation pile pile concrete, concrete casting can be poured into ground, though being convenient to bore core, this method detects, but the concrete of building also need be abolished when soil excavation more, has increased engineering cost.
But.In practical operation, in order to accelerate the construction period, save cost, find early the foundation pile problem and in time process, generally not boring core under the situation of concreting at the empty pile cutoff of foundation pile detects, like this, have following defective: (1) is after drill bit of drilling machine passes the sky pile cutoff, creep into buried underground Under Pile top concrete surface, biased poor because of foundation pile, bore position, core hole and be difficult to accurate location, particularly same when being examined foundation pile and need to lay a plurality of brill cores hole, bore the core hole and more be difficult to guarantee symmetrical; (2) because of Under Pile top concrete surface out-of-flatness, bore core hole position of opening and may be positioned at the Under Pile top edge, be easy to depart from the phenomenon of foundation pile pile body in drilling process; When (3) creeping in long stake or super long pile, bore after the core hole departs from pile body, can bore disconnected foundation pile reinforcing bar and bore less than the phenomenon at the bottom of Under Pile, core of concrete that can not the full foundation pile of complete extraction, can not accurately judge foundation pile length and Under Pile base thickness degree, show namely that also core drilling method detects unsuccessfully.
Number of drawbacks in above-mentioned all can cause foundation pile to bore the problem that core detected unsuccessfully or detected mistake, thereby also is difficult to obtain to realize the quality examination to foundation pile, is difficult to guarantee the quality of foundation pile.
The utility model content
The purpose of this utility model is to be provided for foundation pile and bores the pre-buried structure that core detects, and is intended to solve foundation pile of the prior art and bores the phenomenon that core detects easy failure or makes a fault, so that be difficult to guarantee the problem of pile quality.
The utility model is to realize like this, be used for foundation pile and bore the pre-buried structure that core detects, described foundation pile is arranged in deep foundation ditch, the top extends to bottom foundation ditch, the vertical section on top to ground is empty pile cutoff, described pre-buried structure comprises that the bottom is inserted in described foundation pile and the top extends to ground hollow sleeve, and described hollow sleeve is the vertical bar shape.
Further, in the concrete of the described foundation pile of described hollow sleeve bottom insertion.
Further, described pre-buried structure also comprises the fixed support that is placed in described empty pile cutoff and is used for fixing described hollow sleeve.
Further, described fixed support comprises the fixed strip of a plurality of intersections, and described hollow sleeve is placed in the infall of two described fixed strips.
Further, described pre-buried structure also comprises a plurality of handling reinforcements that are placed in described empty pile cutoff, and described fixed support is connected in described handling reinforcement.
Further, described pre-buried structure also comprises the stirrup that is placed in described empty pile cutoff, and described stirrup is sheathed on outside many described handling reinforcements.
Compared with prior art, due to the bottom of hollow sleeve directly in foundation pile, and be the vertical bar shape, the top extends on ground, like this, when needs bore the core detection to foundation pile, directly creep into along hollow sleeve and can, avoid occurring boring core and depart from foundation pile or bore not on earth phenomenon, and can save engineering cost.
Description of drawings
Fig. 1 be the utility model embodiment provide be used for the cut-away illustration that foundation pile bores the pre-buried structure that core detects;
Fig. 2 is the cut-away illustration at A place in Fig. 1;
Fig. 3 is the cut-away illustration at B place in Fig. 1.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Below in conjunction with concrete accompanying drawing, realization of the present utility model is described in detail.
As shown in Fig. 1 ~ 3, a preferred embodiment that provides for the utility model.
The pre-buried structure 1 that the present embodiment provides is used for foundation pile 3 and bores the core detection.Foundation pile 3 is arranged on foundation ditch 2 bottoms, and its top is emerging on foundation ditch 2 bottoms, and foundation ditch 2 digs on ground 4 times, and described foundation pile 3 began construction from ground before foundation ditch 2 excavations, is empty pile cutoff 5 in the extension on foundation pile 3 top to ground 4.
Above-mentioned pre-buried structure 1 comprises hollow sleeve 11, and this hollow sleeve 11 is the vertical bar shape, and its bottom extends in foundation pile 3 pile bodies, namely is placed in foundation pile 3, and the top extends upwardly on ground 4.Like this; when the concrete curing of foundation pile 3 to the length of time or after reaching design strength; in the time of need to carrying out quality examination to foundation pile 3; rig directly can be crept in foundation pile 3 pile bodies by hollow sleeve 11; and then the core of getting in foundation pile 3 detects; complete the quality examination to foundation pile 3, guaranteed the quality of foundation pile 3.
Because the bottom of sleeve pipe 11 directly extends in the pile body of foundation pile 3, and sleeve pipe 11 is the vertical bar shape, like this, guaranteeing to bore core can accurately locate, in the process of creeping into, foundation pile 3 pile bodies can not occur departing from or bore less than the phenomenon at the bottom of 3 of foundation piles, and not needing cubic metre of earth excavating in foundation ditch 2 saved engineering cost yet.
Certainly, according to the actual needs of examined foundation pile 3, can be on same foundation pile 3 alternate a plurality of above-mentioned hollow sleeves 11 of layout, generally, the quantity of the sleeve pipe 11 on same foundation pile 3 is 1 ~ 3.
Be provided with reinforcing cage in foundation pile 3 pile bodies, in order to guarantee firm connection of hollow sleeve 11 and foundation pile 3 pile bodies, the bottom of sleeve pipe 11 extends in foundation pile 3 pile concretes, and uses fixed support to be connected with reinforcing cage.
The top of sleeve pipe 11 is emerging on ground 4, and its bottom is embedded in foundation pile 3 pile bodies, and the degree of depth of embedding generally should not be less than 3.0m, and the verticality that sleeve pipe 11 is buried underground should be less than 0.5%.
When same foundation pile 3 is provided with a plurality of sleeve pipe 11, in order to guarantee the position relationship of a plurality of sleeve pipes 11, and guarantee the verticality of sleeve pipe 11, be provided with fixed support 12 in foundation ditch 2 bottoms to the empty pile cutoff 5 on ground 4, be used for splicing sleeve 11, fix with the position that guarantees sleeve pipe 11.
Certainly, when foundation pile 3 is provided with a sleeve pipe 11, also can adopt above-mentioned fixed support 12 to be fixed sleeve pipe 11.
In the present embodiment, fixed support 12 comprises a plurality of fixed strips arranged in a crossed manner, and 11 of sleeve pipes are positioned at the infall that fixed strip directly intersects to form.Along the upwardly extending direction of empty pile cutoff 5, can a plurality of above-mentioned fixed supports 12 of alternate layout in empty pile cutoff 5.
Fix for the position that guarantees fixed support 12, also be provided with the handling reinforcement 14 of downward-extension on the many empty pile cutofves 5 in edge, handling reinforcement 14 firmly is connected with the pile body reinforcing cage, and fixed support 12 is connected on these many handling reinforcements 14.The present embodiment middle sleeve 11 is steel sleeve 11, and certainly, sleeve pipe 11 that also can other material is specifically decided by actual conditions.
In the present embodiment, empty pile cutoff 5 also is provided with stirrup 13, and it is around the inwall setting of empty pile cutoff 5, and above-mentioned a plurality of handling reinforcements 14 are connected on this stirrup 13, and namely stirrup 13 is set in outside many handling reinforcements 14.
In the present embodiment, practice of construction is as follows:
1), according to foundation pile 3 diameter, lay 1 ~ 3 and bore the core hole;
2), from ground 4 castinplace piles of constructing, after pore-forming, the reinforcing cage of the real pile cutoff pile body of colligation;
3), processing hollow sleeve 11, the diameter of sleeve pipe 11 should be not less than 168mm, its bottom welding has steel plate to block up, the bottom of sleeve pipe 11 extends in the real pile cutoff of castinplace pile, with the bottom of sleeve pipe 11 with fixed support 12 colligations on reinforcing cage;
4), hollow tube 11 inserts in a hole with reinforcing cage, fixation is adopted in the aperture, ground, guarantees during concreting, reinforcing cage and hollow tube 11 can not float;
5), build the concrete of real pile cutoff, when foundation pile 3 tops reach design altitude, backfill in the empty pile cutoff 5;
6), when concrete reaches the length of time or reaches design strength, detect along beginning to bore core in the aperture of the sleeve pipe 11 in castinplace pile on ground 4.
In above-mentioned operating process, when sleeve pipe 11 inserts the less or empty pile cutoff 5 of the degree of depth in foundation pile 3 pile bodies when longer, in above-mentioned steps 3) and step 4) between, increase following operation:
The reinforcing cage of empty pile cutoff 5 and real pile cutoff with the footpath on colligation handling reinforcement 14, and along the vertical direction, lay at a certain distance stirrup 13, and fixed support 12 be fixed on handling reinforcement 14, guarantee that the phenomenon that is shifted and tilts can not appear in sleeve pipe 11.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. be used for foundation pile and bore the pre-buried structure that core detects, described foundation pile is arranged in deep foundation ditch, the top extends to bottom foundation ditch, the vertical section on top to ground is empty pile cutoff, it is characterized in that, described pre-buried structure comprises that the bottom is inserted in described foundation pile and the top extends to ground hollow sleeve, and described hollow sleeve is the vertical bar shape.
2. the pre-buried structure that bores the core detection for foundation pile as claimed in claim 1, is characterized in that, in the concrete of the described foundation pile of described hollow sleeve bottom insertion.
3. the pre-buried structure that bores the core detection for foundation pile as claimed in claim 1 or 2, is characterized in that, described pre-buried structure also comprises the fixed support that is placed in described empty pile cutoff and is used for fixing described hollow sleeve.
4. the pre-buried structure that bores the core detection for foundation pile as claimed in claim 3, is characterized in that, described fixed support comprises the fixed strip of a plurality of intersections, and described hollow sleeve is placed in the infall of two described fixed strips.
5. the pre-buried structure that bores the core detection for foundation pile as claimed in claim 3, is characterized in that, described pre-buried structure also comprises a plurality of handling reinforcements that are placed in described empty pile cutoff, and described fixed support is connected in described handling reinforcement.
6. the pre-buried structure that bores the core detection for foundation pile as claimed in claim 5, is characterized in that, described pre-buried structure also comprises the stirrup that is placed in described empty pile cutoff, and described stirrup is sheathed on outside many described handling reinforcements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220583173 CN202925575U (en) | 2012-11-07 | 2012-11-07 | Pre-buried structure for core-drilling detection of foundation pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220583173 CN202925575U (en) | 2012-11-07 | 2012-11-07 | Pre-buried structure for core-drilling detection of foundation pile |
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| CN202925575U true CN202925575U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220583173 Expired - Fee Related CN202925575U (en) | 2012-11-07 | 2012-11-07 | Pre-buried structure for core-drilling detection of foundation pile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604102A (en) * | 2015-12-28 | 2016-05-25 | 厦门市工程检测中心有限公司 | On-site measurement method for perpendicularity of cast-in-place concrete pile body and drilling core hole |
| CN106638572A (en) * | 2016-11-14 | 2017-05-10 | 太原理工大学 | Overlength stiffening core cast-in-place pile construction method |
| CN110295634A (en) * | 2019-08-15 | 2019-10-01 | 中国电建集团贵州电力设计研究院有限公司 | A kind of GNSS monitoring device and its construction method convenient for field installation |
| CN112681317A (en) * | 2020-12-28 | 2021-04-20 | 中国建筑第八工程局有限公司 | Construction method for preventing pile body from hole crossing |
-
2012
- 2012-11-07 CN CN 201220583173 patent/CN202925575U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604102A (en) * | 2015-12-28 | 2016-05-25 | 厦门市工程检测中心有限公司 | On-site measurement method for perpendicularity of cast-in-place concrete pile body and drilling core hole |
| CN106638572A (en) * | 2016-11-14 | 2017-05-10 | 太原理工大学 | Overlength stiffening core cast-in-place pile construction method |
| CN110295634A (en) * | 2019-08-15 | 2019-10-01 | 中国电建集团贵州电力设计研究院有限公司 | A kind of GNSS monitoring device and its construction method convenient for field installation |
| CN110295634B (en) * | 2019-08-15 | 2024-04-02 | 中国电建集团贵州电力设计研究院有限公司 | GNSS monitoring device convenient for field installation and construction method thereof |
| CN112681317A (en) * | 2020-12-28 | 2021-04-20 | 中国建筑第八工程局有限公司 | Construction method for preventing pile body from hole crossing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN GONGKAN GEOTECHNICAL GROUP CO., LTD. Free format text: FORMER NAME: SHENZHEN GONGKAN GEOTECHNICAL ENGINEERING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong city of Shenzhen province Futian District Fu Road Fujing building 3 building 20-21 layer Patentee after: Shenzhen Gongkan Geotechnical Group Co., Ltd. Address before: 518026 Guangdong city of Shenzhen province Futian District Fu Road King Fook building, block 20-22 Patentee before: Shenzhen Gongkan Geotechnical Engineering Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20161107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |