CN104895066B - The construction method of overlength churning strength core built pile - Google Patents
The construction method of overlength churning strength core built pile Download PDFInfo
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- CN104895066B CN104895066B CN201510313174.8A CN201510313174A CN104895066B CN 104895066 B CN104895066 B CN 104895066B CN 201510313174 A CN201510313174 A CN 201510313174A CN 104895066 B CN104895066 B CN 104895066B
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Abstract
The invention discloses a kind of overlength churning strength core built pile construction method, comprise the following steps: (1) determines the quantity of rotary churning pile expanding reach in overlength jet grouting pile pile body, the diameter of rotary churning pile expanding reach according to the vertically and horizontally distribution situation etc. of geology situation judging high artesian section and non-high artesian section；(2) use high-pressure rotary-spray drill bit to carry out organizing overlength jet grouting pile construction more, set the spacing of organizing overlength jet grouting pile according to the diameter of rotary churning pile expanding reach more；(3) make each parts of pile joint, utilize wing plate connecting bolt and wing plate connecting plate the wing plate assembly of the I-steel of constituent parts length to be connected in the horizontal, form the Section-steel Piles of unit length；(4) plugging Section-steel Piles, according to the design length of Section-steel Piles, the Section-steel Piles of constituent parts length is assembled by web connecting bolt and web connecting plate, and assembly limit, limit plugs, and completes the construction working of overlength churning strength core built pile；(5) construction of rotary churning pile expanding reach and overlength jet grouting pile is completed.
Description
Technical field
The present invention relates to the construction method of a kind of hard and soft built pile, relate to a kind of multiple overlength jet grouting piles and construction method of a Section-steel Piles built pile be applicable to high artesian ground especially.
Background technology
Pressure Revolving Blast-Grout is the new technology introducing High-Pressure Water technology on the basis of the theory and practice of static pressure grouting and growing up, it is primarily used to consolidated subsoil, the shearing strength of raising ground, is usually used in the engineerings such as basic antiseepage, the current character improving foundation soil and stable side slope.According to the difference of injection method, single pipe method, double tube method and tri-tube method can be divided into.It is relatively wide that Pressure Revolving Blast-Grout has the scope of application, easy construction, and the induration proterties that formed of high pressure jet stream such as can control at the advantage.Triple tube jet-grouting pile construction technique is to make high pressure water and air simultaneously transverse injection, erosion cutting foundation soil body with three layers of playpipe, relends the climbing power of air and water and broken remaining soil paste is lifted to earth's surface discharges；Meanwhile, cement mortar is injected in ground cut, that stir by another nozzle with lower pressure injection, makes cement mortar mix consolidation pile with soil, reaches the purpose reinforced.It is applicable to the reinforcing soft foundations such as sandy soil, clay, artificial earth fill, mud.Have that equipment is simple and convenient to operate, reliable in quality, speed are fast, the advantage such as low cost and applied range.But, for some engineerings due to high artesian or the high-pressure rotary jet grouting pile degree of depth deeper time, groundwater pressure is relatively big, and common grouting equipment is difficult to, by the slurry injection of lower pressure to the soil body of surrounding, not be formed for the pile body of intended diameter.
But, in high artesian ground, just require that the intensity of pile body needs to reach certain requirement, though pure flexible pile can be suitably used for high artesian ground, but it is on the weak side in intensity, traditional rigid-flexible mechanical arm uses a soft firm integrated mode, in deep foundation pit support, connect more weak between this type of built pile, easily cause the phenomenons such as piping stream soil at the bottom of high artesian seepage, Foundation Pit.
Therefore, need badly at present and seek that one can meet that pile quality in high artesian ground is good, pile strength is easy to control, anti-seepage effect significant hard and soft built pile construction method simultaneously.
Summary of the invention
It is an object of the invention to overcome drawbacks described above, it is provided that the construction method of a kind of overlength churning strength core built pile.It is an object of the invention to be achieved through the following technical solutions:
A kind of overlength churning strength core built pile construction method, it is characterised in that described overlength churning strength core built pile includes that multiple overlength jet grouting pile and Section-steel Piles, three overlength jet grouting piles are connected as an entirety by a Section-steel Piles；Section-steel Piles is spliced to form by pile joint by I-steel, and pile joint includes wing plate connecting bolt, wing plate connecting plate, web connecting bolt and web connecting plate；The wing plate of three I-steel connects two-by-two, encloses fixing by wing plate connecting bolt and wing plate connecting plate, and cross section is triangular in shape；Web connecting bolt and the fixing splicing of web connecting plate is used between upper and lower I-steel；Overlength jet grouting pile descends accordingly and at the pile joint of high artesian section and Section-steel Piles, is provided with rotary churning pile expanding reach；
Described construction method comprises the following steps:
(1) according to geology situation judging high artesian section and the vertically and horizontally distribution situation of non-high artesian section, and according to the pile joint number of Section-steel Piles, the quantity of rotary churning pile expanding reach in overlength jet grouting pile pile body, the diameter of rotary churning pile expanding reach are determined；
(2) use high-pressure rotary-spray drill bit to carry out organizing overlength jet grouting pile construction more, diameter according to rotary churning pile expanding reach sets the spacing organizing overlength jet grouting pile more, the rotary churning pile expanding reach keeping adjacent overlength jet grouting pile can be completely overlapped, and in high artesian section top/bottom latitude, form rotary churning pile expanding reach, in the pile joint top/bottom latitude of Section-steel Piles, form rotary churning pile expanding reach simultaneously；
(3) each parts of pile joint are made, i.e. wing plate connecting bolt, wing plate connecting plate, web connecting bolt and web connecting plate, utilize wing plate connecting bolt and wing plate connecting plate the wing plate assembly of the I-steel of constituent parts length to be connected in the horizontal, form the Section-steel Piles of unit length；
(4) plugging Section-steel Piles, according to the design length of Section-steel Piles, the Section-steel Piles of constituent parts length is assembled by web connecting bolt and web connecting plate, and assembly limit, limit plugs, and completes the construction working of overlength churning strength core built pile；
(5) in high artesian section and pile joint lateral extent, complete the construction of rotary churning pile expanding reach, in non-high artesian section lateral extent, complete the construction of overlength jet grouting pile pile body.
Further, the length of rotary churning pile expanding reach is at least high artesian section or the twice of pile joint length.
Instant invention overcomes traditional rigid-flexible mechanical arm and use soft firm integrated mode bonding strength shortcoming on the weak side, use a how soft firm pattern to enhance the bonding strength between combination pile body by employing.
The combination shaped steel of the present invention can be combined press-in, separate extract, and can recycling again, save construction cost, improve section bar utilization rate.
The present invention setting by rotary churning pile expanding reach, enhances the integrated bond power of soft many just built piles, thus enhances vertically and horizontally bearing capacity and the water-retaining capacity of overlength churning strength core built pile.
The present invention is directed to high artesian area uses a how soft the most embedding integrated mode firm, double to tackle the impact that foundation ditch is caused by high artesian region, stops construction accident, for non-high artesian district, uses common flexible pile supporting pattern.
Accompanying drawing explanation
Fig. 1 is the utility model overlength churning strength core built pile site operation layout drawing.
Fig. 2 is that three overlength jet grouting piles are connected as the schematic diagram of entirety by a Section-steel Piles.
Fig. 3 is A-A generalized section in Fig. 2.
Fig. 4 is B-B generalized section in Fig. 2.
Fig. 5 is that the connection of Section-steel Piles makes schematic diagram.
Fig. 6 is the web connection diagram of upper and lower I-steel in Fig. 5.
In figure: 1-rotary churning pile expanding reach；2-overlength jet grouting pile；3-Section-steel Piles；4-pile joint；5-high artesian section；6-non-high artesian section；7-wing plate；8-web；9-web connecting bolt；10-web connecting plate；11-wing plate connecting bolt；12-wing plate connecting plate.
Detailed description of the invention
Fig. 1 is overlength churning strength core built pile site operation layout drawing of the present invention.Fig. 2 is that three overlength jet grouting piles are connected as the schematic diagram of entirety by a Section-steel Piles.Fig. 3 is A-A generalized section in Fig. 2.Fig. 4 is B-B generalized section in Fig. 2.Fig. 5 is that the connection of Section-steel Piles makes schematic diagram.Fig. 6 is the web connection diagram of upper and lower I-steel in Fig. 5.
Overlength churning strength core built pile as Figure 1-4, including multiple overlength jet grouting piles 2 and Section-steel Piles 3, three overlength jet grouting piles 2 are connected as an entirety by a Section-steel Piles 3.Overlength jet grouting pile descends accordingly and at the pile joint 4 of high artesian section 5 and Section-steel Piles, is provided with rotary churning pile expanding reach 1.
With reference to Fig. 5, Section-steel Piles 3 is spliced to form by pile joint 4 by I-steel, and pile joint 4 is made up of wing plate connecting bolt 11, wing plate connecting plate 12, web connecting bolt 9 and web connecting plate 10.The wing plate 7 of three I-steel connects two-by-two, encloses fixing by wing plate connecting bolt 11 and wing plate connecting plate 12, and cross section is triangular in shape；Web connecting bolt 9 and the fixing splicing of web connecting plate 10 is used between upper and lower I-steel.
Overlength churning strength core built pile construction method, specifically includes following construction procedure:
According to field geological investigation result, judge high artesian section 5 and the vertically and horizontally distribution situation of non-high artesian section 6, the genesis analysis scope of high artesian section 5 is between below ground 14 ~ 16m, the cross direction profiles area of high artesian section 5 is 6m × 6m, other region is then non-high artesian section 6, the unit length of the employing of Section-steel Piles 3 is 6m, the long 30m of stake, have four pile joints 4, therefore, the quantity of the rotary churning pile expanding reach 1 of single overlength churning strength core built pile is five, and the diameter of rotary churning pile expanding reach 1 uses 1m, and the diameter of overlength jet grouting pile 2 uses 0.75m.
nullAccording to the overlength churning strength core built pile arrangement form shown in Fig. 2，I.e. one overlength churning strength core built pile uses three overlength jet grouting piles 2 and the integrated mode of a Section-steel Piles 3，High-pressure rotary-spray drill bit is used first to carry out the construction of three overlength jet grouting piles，The center distance of the pile body of overlength churning strength core built pile is set to 0.875m，The rotary churning pile expanding reach 1 keeping adjacent overlength jet grouting pile can be completely overlapped，And in high artesian section 5 top/bottom latitude, form rotary churning pile expanding reach 1，In pile joint 4 top/bottom latitude of Section-steel Piles 3, form rotary churning pile expanding reach 1 simultaneously，The rotary churning pile expanding reach 1 i.e. arranged between churning pile body 13 ~ 17m，A diameter of 100cm、A length of 4m，At 6m、12m、18m、Rotary churning pile expanding reach 1 it is also provided with at 24m，A diameter of 100cm、A length of 0.5m，Other position is rotary churning pile pile body 2，A diameter of 75cm.
Make each parts of pile joint 4, i.e. wing plate connecting bolt 9, wing plate connecting plate 10, web connecting bolt 11 and web connecting plate 12, the angle of 12 liang of covering of the fans of wing plate connecting plate is 60 °, the length × width x thickness of each leaf plank is 200mm × 100mm × 5mm, the size being arranged on two trapezoidal shapes in wing plate connecting plate 12 top is: the upper end × go to the bottom × a height of 6.5mm × 11.5mm × 5.7mm, and the welding of each parts is formed wing plate connecting plate 12.The wing plate connecting plate 12 made is carried out oblique perforate according to Fig. 5, a diameter of 15mm in hole.Selecting the double end wing plate connecting bolt 11 of a length of 240mm, a diameter of 14mm, be configured with oblique coupling nut, the angle of inclination of nut is set to 60 °.On wing plate connecting plate 12, equidistant (spacing of 50mm) arranges four double end wing plate connecting bolts 11, offers the inclined hole of a diameter of 15mm on the I-steel wing plate 7 corresponding with wing plate connecting plate 12.With reference to Fig. 5, selection length × width x thickness is that the steel plate of 200mm × 100mm × 7.5mm is as web connecting plate 10, and equidistant four row two row perforates, the spacing of adjacent holes is 50mm, opening diameter is 15mm, accordingly, and perforate on each I-steel two end web 8, opening diameter is 15mm, is connected by upper and lower adjacent I-steel by the web connecting bolt 9 of long 32mm, diameter 14mm.Section-steel Piles 3 is defined by longitudinally connected and wing plate connecting bolt 11 and wing plate connecting plate 12 the lateral connection of web connecting bolt 9 and web connecting plate 10, the element length of one Section-steel Piles 3 is set to 6m, by pile joint 4 can extended pattern piling bar 3 length until design require length.
Crane is used to carry out in place by the Section-steel Piles 3 of the element length assembled, use press to carry out static pressure, when often having pressed the Section-steel Piles 3 of an element length, use pile joint 4 to carry out joint connection in site assembled, until Section-steel Piles 3 pressure forming 30m length sets end, ultimately form overlength churning strength core built pile.
Finally, according to the pile body construction plane distribution form shown in Fig. 1, according to above-mentioned embodiment, in high artesian section 5 lateral extent, it is gradually completing the construction of overlength churning strength core built pile, in non-high artesian section 6 lateral extent, completes the construction of rotary churning pile pile body 2.
Above-mentioned detailed description of the invention limits technical scheme the most in any form, and the technical scheme that the mode of every employing equivalent or equivalent transformation is obtained all falls within protection scope of the present invention.
Claims (2)
1. an overlength churning strength core built pile construction method, it is characterised in that described overlength churning strength core built pile includes that multiple overlength jet grouting pile and Section-steel Piles, three overlength jet grouting piles are connected as an entirety by a Section-steel Piles；Section-steel Piles is spliced to form by pile joint by I-steel, and pile joint includes wing plate connecting bolt, wing plate connecting plate, web connecting bolt and web connecting plate；The wing plate of three I-steel connects two-by-two, encloses fixing by wing plate connecting bolt and wing plate connecting plate, and cross section is triangular in shape；Web connecting bolt and the fixing splicing of web connecting plate is used between upper and lower I-steel；Overlength jet grouting pile descends accordingly and at the pile joint of high artesian section and Section-steel Piles, is provided with rotary churning pile expanding reach；
Described construction method comprises the following steps:
(1) according to geology situation judging high artesian section and the vertically and horizontally distribution situation of non-high artesian section, and according to the pile joint number of Section-steel Piles, the quantity of rotary churning pile expanding reach in overlength jet grouting pile pile body, the diameter of rotary churning pile expanding reach are determined；
(2) use high-pressure rotary-spray drill bit to carry out organizing overlength jet grouting pile construction more, diameter according to rotary churning pile expanding reach sets the spacing organizing overlength jet grouting pile more, the rotary churning pile expanding reach keeping adjacent overlength jet grouting pile can be completely overlapped, and in high artesian section top/bottom latitude, form rotary churning pile expanding reach, in the pile joint top/bottom latitude of Section-steel Piles, form rotary churning pile expanding reach simultaneously；
(3) each parts of pile joint are made, i.e. wing plate connecting bolt, wing plate connecting plate, web connecting bolt and web connecting plate, utilize wing plate connecting bolt and wing plate connecting plate the wing plate assembly of the I-steel of constituent parts length to be connected in the horizontal, form the Section-steel Piles of unit length；
(4) plugging Section-steel Piles, according to the design length of Section-steel Piles, the Section-steel Piles of constituent parts length is assembled by web connecting bolt and web connecting plate, and assembly limit, limit plugs, and completes the construction working of overlength churning strength core built pile；
(5) in high artesian section and pile joint lateral extent, complete the construction of rotary churning pile expanding reach, in non-high artesian section lateral extent, complete the construction of overlength jet grouting pile pile body.
Construction method the most according to claim 1, it is characterised in that the length of rotary churning pile expanding reach is at least high artesian section or the twice of pile joint length.
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| CN107044120A (en) * | 2017-04-20 | 2017-08-15 | 武汉谦诚桩工科技股份有限公司 | A kind of major diameter ultra deep stirs spray stiff composite pile and its construction method |
| CN110172966A (en) * | 2019-05-23 | 2019-08-27 | 上海长凯岩土工程有限公司 | A kind of oblique steel pipe composite structure forms the construction method of beaer |
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| GB2111632A (en) * | 1981-12-14 | 1983-07-06 | Pee Hong Lee | Pile joints |
| CN2410329Y (en) * | 2000-01-27 | 2000-12-13 | 上海三佳建设(集团)有限公司 | Reinforced concrete stirring device |
| CN102383432A (en) * | 2011-02-23 | 2012-03-21 | 上海城地建设发展有限公司 | Enclosure method for inserting H-shaped reinforced concrete slab piles in three-axis (two-axis) cement mixing pile |
| CN103195056A (en) * | 2013-04-25 | 2013-07-10 | 福州市第三建筑工程公司 | Prestress combined tubular pile and field assembly method thereof |
| CN103290848A (en) * | 2013-06-20 | 2013-09-11 | 江苏城市职业学院 | Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof |
| CN203238618U (en) * | 2013-04-24 | 2013-10-16 | 山东同圆设计集团有限公司 | Novel steel pile |
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2015
- 2015-06-09 CN CN201510313174.8A patent/CN104895066B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2111632A (en) * | 1981-12-14 | 1983-07-06 | Pee Hong Lee | Pile joints |
| CN2410329Y (en) * | 2000-01-27 | 2000-12-13 | 上海三佳建设(集团)有限公司 | Reinforced concrete stirring device |
| CN102383432A (en) * | 2011-02-23 | 2012-03-21 | 上海城地建设发展有限公司 | Enclosure method for inserting H-shaped reinforced concrete slab piles in three-axis (two-axis) cement mixing pile |
| CN203238618U (en) * | 2013-04-24 | 2013-10-16 | 山东同圆设计集团有限公司 | Novel steel pile |
| CN103195056A (en) * | 2013-04-25 | 2013-07-10 | 福州市第三建筑工程公司 | Prestress combined tubular pile and field assembly method thereof |
| CN103290848A (en) * | 2013-06-20 | 2013-09-11 | 江苏城市职业学院 | Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof |
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Effective date of registration: 20180601 Address after: 225200 Xindu Road, Jiangdu District, Yangzhou, Jiangsu Province, No. 399 Patentee after: JIANGSU HUAJIANG CONSTRUCTION GROUP Co.,Ltd. Address before: 310015 office room 1901, block C, Wanda Plaza, intersection of Gongshu District Shi Xiang Road and Hang Hang Road, Hangzhou, Zhejiang. Patentee before: HANGZHOU JIANGRUN TECHNOLOGY Ltd. |
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Denomination of invention: Construction method of super-long rotary jet stiffened core composite pile Effective date of registration: 20230129 Granted publication date: 20160824 Pledgee: Yangzhou Branch of Bank of Jiangsu Co.,Ltd. Pledgor: JIANGSU HUAJIANG CONSTRUCTION GROUP Co.,Ltd. Registration number: Y2023980031288 |
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