CN101818493A - Construction method of compound ground base - Google Patents
Construction method of compound ground base Download PDFInfo
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- CN101818493A CN101818493A CN 201010135858 CN201010135858A CN101818493A CN 101818493 A CN101818493 A CN 101818493A CN 201010135858 CN201010135858 CN 201010135858 CN 201010135858 A CN201010135858 A CN 201010135858A CN 101818493 A CN101818493 A CN 101818493A
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Abstract
The invention discloses a construction method of a compound ground base, comprising the following steps of enabling a drilling machine to be in position; drilling a hole to the designed elevation; pre-stirring a mixed material; lifting a pipe and simultaneously pumping the mixed material to the designed elevation; protecting pile length, clearing soil, cutting off piles, paving a cushion layer and the like. The construction method has the advantages of high construction efficiency, low noise, strong pore-forming penetration capability, easy control of quality, lower construction cost and the like, and can be widely applied to processing ground bases of high-rise buildings.
Description
Technical field:
The present invention relates to a kind of job practices of ground.
Background technology:
Existing foundation construction method is a lot, but all has different defectives, and construction is complicated, the cost height, and quality is wayward.
Summary of the invention:
The object of the present invention is to provide the high and low noise of a kind of efficiency of construction, the quality job practices of the composite foundation of control easily.
Technical solution of the present invention is:
A kind of job practices of composite foundation is characterized in that: comprise the following steps:
(1) rig is in place, holes to design elevation;
(2) mix material in advance: CFG pile material and match ratio:
CFG stake pile strength grade C15 adopts 42.5 Portland cements, sand, particle diameter 5～10mm rubble, II level flyash and pumping admixture, the compound slump 18～20cm; Concrete stirs and requires every biscuit mixing time to be no less than 60S, and the compound slump is controlled at 18～20cm; CFG stake Mixture Ratio is: cement 300 weight portions, sand 195 weight portions, sand 714 weight portions, rubble 1149 weight portions, flyash 50 weight portions, pumping admixture 11 weight portions, water 195 weight portions;
(3) carry pipe simultaneous pumping compound to design elevation, with concrete pump and long-spiral drilling machine matching operation, rig promotion speed is controlled at 2～3m/min when construction, in long-spiral drilling machine unit head elbow outlet valve is set, and guarantees that the air in the drilling rod can be discharged;
(4) the protection stake is long: construction back stake top mark height exceeds the high 500mm of design stake top mark, and push up with grave on top;
(5) clear soil and section stake:
The CFG pile driving construction adopts machinery to cut the earth after 7 days and indwelling is no less than the thick soil body of 700mm, adopts the hand excavation; Reject one by one to design elevation along the circumferential stake of a stake heart with drill rod when rejecting pile crown, after pile crown was handled, inter-pile soil and pile crown were at same absolute altitude;
(6) mattress layer is laid
Mattress layer is laid on and carries out after the pile crown processing finishes, and the mattress layer material uses 5～10mm rubble, and the static(al) compacting is adopted in back, empty shop, rams degree of filling out and is not more than 0.9.
Advantages such as the present invention has the high and low noise of efficiency of construction, the pore-forming penetration capacity is strong, quality is controlled easily, cost is lower can be widely used in the Ground Treatment of High-rise Buildings.Composite foundation of the present invention can be good at solving the highrise building Question of Ground Bearing Capacity.Ground is handled the back characteristic load bearing capacity and is improved 2～3 times; Pile composite foundation of the present invention has made full use of the bearing capacity of inter-pile soil, compares with adopting pile foundation, and its cost and duration only are about 1/3 of pile foundation, and overall economic efficiency is obvious; Adopt its efficiency of construction height of pump pressure CFG pile constructing process in the long spiral pore-forming, pore-forming penetration capacity strong.
The invention will be further described below in conjunction with embodiment.
The specific embodiment:
A kind of job practices of composite foundation comprises the following steps:
(1) rig is in place, holes to design elevation;
(2) mix material in advance: CFG pile material and match ratio:
CFG stake pile strength grade C15 adopts 42.5 Portland cements, sand, particle diameter 5～10mm rubble, II level flyash and pumping admixture, the compound slump 18～20cm; Concrete stirs and requires every biscuit mixing time to be no less than 60S, and the compound slump is controlled at 18～20cm; CFG stake Mixture Ratio is: cement 300 weight portions, sand 195 weight portions, sand 714 weight portions, rubble 1149 weight portions, flyash 50 weight portions, conventional commercially available pumping admixture 11 weight portions, water 195 weight portions;
(3) carry pipe simultaneous pumping compound to design elevation, with concrete pump and long-spiral drilling machine matching operation, rig promotion speed is controlled at 2～3m/min when construction, in long-spiral drilling machine unit head elbow outlet valve is set, and guarantees that the air in the drilling rod can be discharged;
(4) the protection stake is long: construction back stake top mark height exceeds the high 500mm of design stake top mark, and push up with grave on top;
(5) clear soil and section stake:
The CFG pile driving construction adopts machinery to cut the earth after 7 days and indwelling is no less than the thick soil body of 700mm, adopts the hand excavation; Reject one by one to design elevation along the circumferential stake of a stake heart with drill rod when rejecting pile crown, after pile crown was handled, inter-pile soil and pile crown were at same absolute altitude;
(6) mattress layer is laid
Mattress layer is laid on and carries out after the pile crown processing finishes, and the mattress layer material uses 5～10mm rubble, and the static(al) compacting is adopted in back, empty shop, rams degree of filling out and is not more than 0.9.
Claims (1)
1. the job practices of a composite foundation is characterized in that: comprise the following steps:
(1) rig is in place, holes to design elevation;
(2) mix material in advance: CFG pile material and match ratio:
CFG stake pile strength grade C15 adopts 42.5 Portland cements, sand, particle diameter 5～10mm rubble, II level flyash and pumping admixture, the compound slump 18～20cm; Concrete stirs and requires every biscuit mixing time to be no less than 60S, and the compound slump is controlled at 18～20cm; CFG stake Mixture Ratio is: cement 300 weight portions, sand 195 weight portions, sand 714 weight portions, rubble 1149 weight portions, flyash 50 weight portions, pumping admixture 11 weight portions, water 195 weight portions;
(3) carry pipe simultaneous pumping compound to design elevation, with concrete pump and long-spiral drilling machine matching operation, rig promotion speed is controlled at 2～3m/min when construction, in long-spiral drilling machine unit head elbow outlet valve is set, and guarantees that the air in the drilling rod can be discharged;
(4) the protection stake is long: construction back stake top mark height exceeds the high 500mm of design stake top mark, and push up with grave on top;
(5) clear soil and section stake:
The CFG pile driving construction adopts machinery to cut the earth after 7 days and indwelling is no less than the thick soil body of 700mm, adopts the hand excavation; Reject one by one to design elevation along the circumferential stake of a stake heart with drill rod when rejecting pile crown, after pile crown was handled, inter-pile soil and pile crown were at same absolute altitude;
(6) mattress layer is laid
Mattress layer is laid on and carries out after the pile crown processing finishes, and the mattress layer material uses 5～10mm rubble, and the static(al) compacting is adopted in back, empty shop, rams degree of filling out and is not more than 0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010135858 CN101818493A (en) | 2010-03-23 | 2010-03-23 | Construction method of compound ground base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010135858 CN101818493A (en) | 2010-03-23 | 2010-03-23 | Construction method of compound ground base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101818493A true CN101818493A (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010135858 Pending CN101818493A (en) | 2010-03-23 | 2010-03-23 | Construction method of compound ground base |
Country Status (1)
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| CN (1) | CN101818493A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617080A (en) * | 2012-04-01 | 2012-08-01 | 中铁二院工程集团有限责任公司 | Pozzolan, cement and gravel pile for reinforcing soft foundation |
| CN102677661A (en) * | 2012-05-07 | 2012-09-19 | 中铁上海工程局有限公司 | Reinforcement method for foundation of silt soft-based cast-in-place box girder support |
| CN102912808A (en) * | 2012-11-06 | 2013-02-06 | 山东兴华建设集团有限公司 | Spiral CFG pile and cement stirring pile combined composite foundation construction method |
| CN102966097A (en) * | 2012-11-30 | 2013-03-13 | 华侨大学 | Novel composite foundation with vertical bearing piles |
| WO2017185817A1 (en) * | 2016-04-27 | 2017-11-02 | 王继忠 | Construction method for on-site mixing cement-soil pile overground |
| CN108570979A (en) * | 2018-04-17 | 2018-09-25 | 中国水利水电第九工程局有限公司 | A kind of construction method for building antiseepage composite foundation on dolomite stratigraph |
| CN109537616A (en) * | 2018-11-26 | 2019-03-29 | 广西万科企业管理有限公司 | A kind of the CFG stake device and its construction method of spiral-digging pore |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1370893A (en) * | 2002-04-04 | 2002-09-25 | 中国建筑科学研究院 | Pile end mortar pre-pressing construction method and apparatus for long screw auger drilling deposited pile and CFG pile |
| CN1542234A (en) * | 2003-11-07 | 2004-11-03 | 东南大学 | Pile forming technology for nail-shaped pile |
| CN1641112A (en) * | 2004-12-28 | 2005-07-20 | 王继忠 | Composite foundation construction method |
-
2010
- 2010-03-23 CN CN 201010135858 patent/CN101818493A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1370893A (en) * | 2002-04-04 | 2002-09-25 | 中国建筑科学研究院 | Pile end mortar pre-pressing construction method and apparatus for long screw auger drilling deposited pile and CFG pile |
| CN1542234A (en) * | 2003-11-07 | 2004-11-03 | 东南大学 | Pile forming technology for nail-shaped pile |
| CN1641112A (en) * | 2004-12-28 | 2005-07-20 | 王继忠 | Composite foundation construction method |
Non-Patent Citations (3)
| Title |
|---|
| 《吉林地质》 20090615 王宪忠等 浅谈长螺旋钻管内泵压CFG桩施工工艺 79-82 1 第28卷, 第2期 * |
| 《建材与装饰》 20080711 韦盛胡 对长螺旋钻管内泵压CFG桩在复杂地基处理施工探讨 77-78 1 , * |
| 《石家庄铁路职业技术学院学报》 20100315 田达 临近既有线施工路基CFG桩工艺研究 29-32 1 第9卷, 第1期 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617080A (en) * | 2012-04-01 | 2012-08-01 | 中铁二院工程集团有限责任公司 | Pozzolan, cement and gravel pile for reinforcing soft foundation |
| CN102677661A (en) * | 2012-05-07 | 2012-09-19 | 中铁上海工程局有限公司 | Reinforcement method for foundation of silt soft-based cast-in-place box girder support |
| CN102912808A (en) * | 2012-11-06 | 2013-02-06 | 山东兴华建设集团有限公司 | Spiral CFG pile and cement stirring pile combined composite foundation construction method |
| CN102966097A (en) * | 2012-11-30 | 2013-03-13 | 华侨大学 | Novel composite foundation with vertical bearing piles |
| WO2017185817A1 (en) * | 2016-04-27 | 2017-11-02 | 王继忠 | Construction method for on-site mixing cement-soil pile overground |
| CN108570979A (en) * | 2018-04-17 | 2018-09-25 | 中国水利水电第九工程局有限公司 | A kind of construction method for building antiseepage composite foundation on dolomite stratigraph |
| CN109537616A (en) * | 2018-11-26 | 2019-03-29 | 广西万科企业管理有限公司 | A kind of the CFG stake device and its construction method of spiral-digging pore |
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Application publication date: 20100901 |