CN105064376A - Combined type foundation pit supporting structure with multiple rows of piles - Google Patents
Combined type foundation pit supporting structure with multiple rows of piles Download PDFInfo
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- CN105064376A CN105064376A CN201510525551.4A CN201510525551A CN105064376A CN 105064376 A CN105064376 A CN 105064376A CN 201510525551 A CN201510525551 A CN 201510525551A CN 105064376 A CN105064376 A CN 105064376A
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- foundation pit
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Abstract
The invention discloses a combined type foundation pit supporting structure with multiple rows of piles. The combined type foundation pit supporting structure comprises a front row of piles, a rear row of piles, jet grouting piles, a prefabricated reinforced concrete square pile, a top beam I, a top beam II, a top beam III, a connecting beam I and a connecting beam II. The top beam I, the top beam II and the top beam IIII are arranged at the top ends of the front row of piles, the top ends of the rear row of piles and the top ends of the jet grouting piles respectively. The top beam I, the top beam II and the top beam III are connected through the connecting beam I and the connecting beam II. The jet grouting piles are constructed in a segmented jet grouting mode. The diameter of a jet-grouted body at the tail end of each jet grouting pile can be correspondingly increased, so that the jet-grouted body forms an expanded head anchoring body. After the jet grouting piles are constructed, the prefabricated reinforced concrete square pile is inserted into the jet grouting piles before the quality of the jet grouting piles are stabilized. According to the combined type supporting structure with the multiple rows of piles, the anti-capsizing performance and the rigidity of a supporting system can be effectively improved, and displacement of pile bodies can be effectively controlled at the later stage of foundation pit excavation process; the combined type foundation pit supporting structure can also serve as a novel deformation control measure used at the later stage of foundation pit excavation.
Description
Technical field
The invention belongs to architecture Foundation Pit Engineering field, relate to a kind of foundation pit supporting construction, be specifically related to a kind of combined type Multi-row pile foundation pit support structure.
Background technology
Along with the fast development of urban construction, deep-foundation pit engineering gets more and more, and difficulty of construction is also increasing, and all kinds of pattern foundation pit supporting structure mode is emerged in large numbers thereupon.Double-row-piles Structure because of its Deformation control effective, supporting and protection structure stability is strong, and the advantages such as applicability is strong, are widely used in domestic deep-foundation pit engineering field.But along with the appearance of ultra-deep foundation pit, conventional two-row pilework faces the excessive difficult problem of pile body shifting sometimes in Excavation Process.
Summary of the invention
The object of the invention is to the deficiency overcoming conventional two-row pilework, a kind of combined type Multi-row pile foundation pit support structure that effectively can control pile body shifting in Deep Excavation is provided.
Technical scheme of the present invention is: a kind of combined type Multi-row pile foundation pit support structure, by front campshed, rear campshed, rotary churning pile, Prefabricated Reinforced Concrete Square Pile, enlarged footing anchoring body, hat beam I, hat beam II, hat beam III, linking beam I and linking beam II form, front campshed, the top of rear campshed and rotary churning pile is respectively arranged with hat beam I, hat beam II and hat beam III, hat beam I, be connected with linking beam II respectively by linking beam I between hat beam II and hat beam III, rotary churning pile adopts double tube method to carry out section rotary spraying construction, the corresponding increase of induration diameter of rotary churning pile terminal position forms enlarged footing anchoring body, after jet grouting pile construction terminates, before rotary churning pile steady quality, Prefabricated Reinforced Concrete Square Pile is inserted wherein.
As the preferred technical solution of the present invention:
The corresponding increase of induration diameter of described rotary churning pile terminal position forms enlarged footing anchoring body.
Described front campshed and rear campshed are bored pile.
Described rotary churning pile adopts double tube method to carry out section rotary spraying construction, and diameter is 0.6 ~ 1.2m, and sublevel interval is 1 ~ 2m, and stake is long is not less than 6m.
The injecting paste material that described rotary churning pile adopts is cement-silicate slurries, and water ash is by weight being 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4% by weight percentage.
Described Prefabricated Reinforced Concrete Square Pile is solid pile, and cross section is square, and sectional dimension is 200 × 200mm ~ 600 × 600mm, and stake is long identical with rotary churning pile.
The diameter of described rotary churning pile position between segmentation induration should be greater than Prefabricated Reinforced Concrete Square Pile cross-sectional length at least 20mm.
The rectangular array arrangement of pile body layout of described front campshed, rear campshed and rotary churning pile and be spaced arrangement.
Construction sequence of the present invention is as follows:
(1) according to construction place exploration report and pattern foundation pit supporting structure Stability Checking result, the construction parameters such as the stake position of front and back campshed and rotary churning pile, diameter and stake be long are determined;
(2) pile-forming machine perching, carries out front and rear row pile driving construction;
(3), after front and rear row quality of pile tends towards stability, configuration cement-silicate slurries, carry out jet grouting pile construction;
(4), after jet grouting pile construction terminates, before its pile quality is stable, Prefabricated Reinforced Concrete Square Pile piling construction is carried out.
Beneficial effect of the present invention is:
The present invention is a kind of combined type Multi-row pile foundation pit support structure, row's section rotary spraying construction is provided with enlarged footing anchoring body after rear campshed in conventional two-row pilework, and be inserted with the rotary churning pile of Prefabricated Reinforced Concrete Square Pile, form the multiline pile supporting and protection structure of combined type, effectively can put forward overturning or slip resistance analysis performance and the rigidity of support system, pile body shifting in effective control later stage Excavation Process, also can be used as excavation of foundation pit later stage newly-increased deformation-controlling measures.
Accompanying drawing explanation
Fig. 1: combined type Multi-row pile foundation pit support structure layout schematic diagram of the present invention.
Fig. 2: combined type Multi-row pile foundation pit support structure sectional type generalized section of the present invention.
Fig. 3: combined type Multi-row pile foundation pit support structure continuous type generalized section of the present invention.
In figure, each label is: 1---front campshed; 2---rear campshed; 3---rotary churning pile; 4---Prefabricated Reinforced Concrete Square Pile; 5---enlarged footing anchoring body; 6---hat beam I; 7---hat beam II; 8---hat beam III; 9---linking beam I; 10---linking beam II; A---earth's surface; B---at the bottom of foundation ditch.
Detailed description of the invention
Below by drawings and Examples, the present invention is described in further detail, but protection scope of the present invention is not limited to described content.
Embodiment 1: as shown in Figure 1, 2, a kind of combined type Multi-row pile foundation pit support structure, is made up of front campshed 1, rear campshed 2, rotary churning pile 3, Prefabricated Reinforced Concrete Square Pile 4, enlarged footing anchoring body 5, hat beam I 6, hat beam II 7, hat beam III 8, linking beam I 9 and linking beam II 10.The top of front campshed 1, rear campshed 2 and rotary churning pile 3 is respectively equipped with hat beam I 6, hat beam II 7 and hat beam III 8, is preced with beam I 6, is connected with linking beam II 10 respectively by linking beam I 9 between hat beam II 7 and hat beam III 8.Rotary churning pile 3 takes section rotary spraying construction, and the corresponding increase of induration diameter of its terminal position forms enlarged footing anchoring body 5.After rotary churning pile 3 construction terminates, before its steady quality, Prefabricated Reinforced Concrete Square Pile 4 is inserted wherein.Front campshed 1 and rear campshed 2 are bored pile, and rotary churning pile 3 adopts double tube method to carry out section rotary spraying construction, and diameter is 0.6 ~ 1.2m, and sublevel interval is 1 ~ 2m, and stake is long is not less than 6m.The injecting paste material of rotary churning pile 3 is cement-silicate slurries, and water/binder ratio is 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4%.Prefabricated Reinforced Concrete Square Pile 4 is solid pile, and cross section is square, and sectional dimension is 200 × 200mm ~ 600 × 600mm, and stake is long identical with rotary churning pile 3.The diameter of rotary churning pile 3 position between segmentation induration should be greater than Prefabricated Reinforced Concrete Square Pile 4 cross-sectional length at least 20mm.The rectangular array arrangement of pile body layout of front campshed 1, rear campshed 2 and rotary churning pile 3 and be spaced arrangement.
Embodiment 2: as shown in Figure 1,3, a kind of combined type Multi-row pile foundation pit support structure, is made up of front campshed 1, rear campshed 2, rotary churning pile 3, Prefabricated Reinforced Concrete Square Pile 4, hat beam I 6, hat beam II 7, hat beam III 8, linking beam I 9 and linking beam II 10.The top of front campshed 1, rear campshed 2 and rotary churning pile 3 is respectively equipped with hat beam I 6, hat beam II 7 and hat beam III 8, is preced with beam I 6, is connected with linking beam II 10 respectively by linking beam I 9 between hat beam II 7 and hat beam III 8.Rotary churning pile 3 takes continuous rotary-spraying construction, after its construction terminates, Prefabricated Reinforced Concrete Square Pile 4 is inserted wherein before its steady quality.Front campshed 1 and rear campshed 2 are bored pile, and rotary churning pile 3 adopts double tube method to construct, and diameter is 0.6 ~ 1.2m, and stake is long is not less than 6m.Injecting paste material is cement-silicate slurries, and water/binder ratio is 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4%.Prefabricated Reinforced Concrete Square Pile 4 is solid pile, and cross section is square, and sectional dimension is 200 × 200mm ~ 600 × 600mm, and stake is long identical with rotary churning pile 3.The diameter of rotary churning pile 3 should be greater than Prefabricated Reinforced Concrete Square Pile 4 cross-sectional length at least 20mm.The rectangular array arrangement of pile body layout of front campshed 1, rear campshed 2 and rotary churning pile 3 and be spaced arrangement.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a combined type Multi-row pile foundation pit support structure, it is characterized in that: by front campshed (1), rear campshed (2), rotary churning pile (3), Prefabricated Reinforced Concrete Square Pile (4), enlarged footing anchoring body (5), hat beam I (6), hat beam II (7), hat beam III (8), linking beam I (9) and linking beam II (10) form, front campshed (1), the top of rear campshed (2) and rotary churning pile (3) is respectively arranged with hat beam I (6), hat beam II (7) and hat beam III (8), hat beam I (6), be connected with linking beam II (10) respectively by linking beam I (9) between hat beam II (7) and hat beam III (8), rotary churning pile (3) adopts double tube method to carry out section rotary spraying construction, the corresponding increase of induration diameter of rotary churning pile (3) terminal position forms enlarged footing anchoring body (5), after jet grouting pile construction terminates, before rotary churning pile (3) steady quality, Prefabricated Reinforced Concrete Square Pile is inserted wherein.
2. a kind of combined type Multi-row pile foundation pit support structure according to claim 1, is characterized in that: described front campshed (1) and rear campshed (2) are bored pile.
3. a kind of combined type Multi-row pile foundation pit support structure according to claim 1, it is characterized in that: described rotary churning pile (3) diameter is 0.6 ~ 1.2m, sublevel interval is 1 ~ 2m, and stake is long is not less than 6m.
4. a kind of combined type Multi-row pile foundation pit support structure according to claim 1, it is characterized in that: the injecting paste material that described rotary churning pile (3) adopts is cement-silicate slurries, water ash is by weight being 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4% by weight percentage.
5. a kind of combined type Multi-row pile foundation pit support structure according to claim 1, it is characterized in that: described Prefabricated Reinforced Concrete Square Pile (4) is the square solid pile in cross section, sectional dimension is 200 × 200mm ~ 600 × 600mm, and stake is long identical with rotary churning pile (3).
6. a kind of combined type Multi-row pile foundation pit support structure according to claim 1, is characterized in that: described rotary churning pile (3) diameter of position between segmentation induration is greater than Prefabricated Reinforced Concrete Square Pile (4) cross-sectional length at least 20mm.
7. a kind of combined type Multi-row pile foundation pit support structure according to claim 1, is characterized in that: the rectangular array arrangement of pile body layout of described front campshed (1), rear campshed (2) and rotary churning pile (3) and be spaced arrangement.
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| CN201510525551.4A CN105064376A (en) | 2015-08-25 | 2015-08-25 | Combined type foundation pit supporting structure with multiple rows of piles |
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| CN201510525551.4A CN105064376A (en) | 2015-08-25 | 2015-08-25 | Combined type foundation pit supporting structure with multiple rows of piles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805049A (en) * | 2019-11-07 | 2020-02-18 | 武汉武建机械施工有限公司 | Construction method of mountain slope ultra-thickness spray anchor permanent supporting structure |
| CN112681333A (en) * | 2020-12-15 | 2021-04-20 | 中国建筑第八工程局有限公司 | Foundation pit supporting structure of waterside bridge abutment foundation and construction method thereof |
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| KR20090085448A (en) * | 2008-02-04 | 2009-08-07 | 코오롱건설주식회사 | Soil retaining method for two rows pile |
| KR101311422B1 (en) * | 2012-04-18 | 2013-09-25 | 주식회사 힐 엔지니어링 | Connection structure of before and after pile connection for two rows pile construction |
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| CN204418187U (en) * | 2014-12-31 | 2015-06-24 | 广东省重工建筑设计院有限公司 | Subway protection region soil nail wall is in conjunction with double-row pile deep foundation ditch composite supporting construction |
| CN104762975A (en) * | 2015-02-10 | 2015-07-08 | 云南建工基础工程有限责任公司 | h-shaped double-row pile structure provided with core-entraining jet grouting pile |
| CN204530720U (en) * | 2015-03-19 | 2015-08-05 | 成都四海岩土工程有限公司 | A kind of foundation pit supporting construction |
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2015
- 2015-08-25 CN CN201510525551.4A patent/CN105064376A/en active Pending
Patent Citations (7)
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| KR20090085448A (en) * | 2008-02-04 | 2009-08-07 | 코오롱건설주식회사 | Soil retaining method for two rows pile |
| KR101311422B1 (en) * | 2012-04-18 | 2013-09-25 | 주식회사 힐 엔지니어링 | Connection structure of before and after pile connection for two rows pile construction |
| CN203583496U (en) * | 2013-11-25 | 2014-05-07 | 中国建筑股份有限公司 | Novel double-row-pile-beam vertical anchor supporting system |
| CN104594360A (en) * | 2014-12-31 | 2015-05-06 | 云南建工基础工程有限责任公司 | Composite double-row pile foundation pit supporting structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805049A (en) * | 2019-11-07 | 2020-02-18 | 武汉武建机械施工有限公司 | Construction method of mountain slope ultra-thickness spray anchor permanent supporting structure |
| CN110805049B (en) * | 2019-11-07 | 2021-05-11 | 武汉武建机械施工有限公司 | Construction method of mountain slope ultra-thickness spray anchor permanent supporting structure |
| CN112681333A (en) * | 2020-12-15 | 2021-04-20 | 中国建筑第八工程局有限公司 | Foundation pit supporting structure of waterside bridge abutment foundation and construction method thereof |
| CN112681333B (en) * | 2020-12-15 | 2022-07-12 | 中国建筑第八工程局有限公司 | Foundation pit supporting structure of waterside bridge abutment foundation and construction method thereof |
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Application publication date: 20151118 |