CN1974939A - Construction foundation working method - Google Patents
Construction foundation working method Download PDFInfo
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- CN1974939A CN1974939A CN 200610134713 CN200610134713A CN1974939A CN 1974939 A CN1974939 A CN 1974939A CN 200610134713 CN200610134713 CN 200610134713 CN 200610134713 A CN200610134713 A CN 200610134713A CN 1974939 A CN1974939 A CN 1974939A
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Abstract
The present invention discloses a construction method of building pile foundation engineering, in particular, it relates to a building foundation construction process of pipe-sinking belled pile. Said construction process includes the following steps: pressing the sinking pipe with metal pile head to the hard soil layer with designed level; taking out said metal pile head, utilizing belling equipment to enlarge base and make the base portion be formed into base hollow cavity; borrowing; placing the radial steel bars into said base hollow cavity and nailing said radial steel bars into the hard soil layer; then pouring the prepared concrete into the base hollow cavity to obtain concrete base, and downwards placing the prefabricated reinforced concrete pile body and making said prefabricated reinforced concrete pile body and cast-in-situ concrete base be butt-connected and anchored into one body by means of inserted steel bars of base portion; drawing out sinking pipe and injecting cement slurry so as to obtain the invented belled pile.
Description
Technical field
The present invention relates to a kind of construction of building pile foundation engineering, particularly construction foundation working method.
Background technology
The quality of building foundation engineering quality will directly influence the quality of building, so each unit in charge of construction not only payes attention to the construction quality of superstructure, and more pay attention to the quality of Foundation Design.And drop into scientific research strength and tap the latent power to pile foundation engineering, make it in the utilization rate of guaranteeing to improve under the prerequisite of workmanship the strength of materials.For the expanded bore pile that improves bearing capacity of single pile, composite foundation stake etc. occur in succession, although this bearing capacity of single pile than traditional foundation pile is significantly improved, but because traditional pile foundation engineering job practices is with manually bit by bit cutting the earth, fetch earth and dig pile body soil, and for prevent that landslide from digging next section of certain depth immersed tube downwards thereupon, when waiting to dig design elevation, the people is sling, expand the end with traditional bottom-expanding equipment again, and be positioned on the hardpan, hang out after the moulding and directly water the concrete pile after bottom-expanding equipment fetches earth.Thereby also there is following defective in visible traditional pile foundation construction foundation working method: the pile body part soil body is with manually diging up, and working face is too big, and the workload that fetches earth obviously increases, inefficiency, cost height; Bottom-expanding equipment is not owing to there is immersed tube to do support, and the location is inaccurate, and the base expanded-angle is too little, and each parameter that expands in the end process can not guarantee, thereby makes the quality of stake be not easy control, and is difficult to reach designing requirement, causes the bearing capacity of single pile to be had a greatly reduced quality; Have constructor's potential safety hazard, the constructor does not note just being prone to accidents slightly; The scope of application is narrow, not only is not suitable for the minor diameter pile body and expands the end, nor can be used for expanding the end and pile under precast pile and the high complicated geological situation.Based on above-mentioned situation, for improving bearing capacity of single pile, reduce the Foundation Design cost, must be improved.
Summary of the invention
The present invention is directed to the problem that above-mentioned technology exists, all kinds of pile bodies that are applicable to various building safety grades, geological condition are provided, guarantee the pile foundation engineering quality, obviously improve bearing capacity of single pile, improve the strength of materials and utilization rate, raising pile efficient, the construction foundation working method of safety.
In order to solve the problems of the technologies described above, the present invention is achieved in that construction foundation working method is as follows: a, the immersed tube that will have a metal pile head pass weak soil and are laminated to the design elevation hardpan; B, taking-up metal pile head, the mark that the detent rail pin of bottom-expanding equipment is aimed on the immersed tube mouth is lowered to immersed tube, start equipment after the equipment upper end is also fixedly positioning and expand the end, expand the end and be vertical earlier expand the end again level expand the end, stop automatically after dark when construction reaches the design mark, base cavity pocket is formed on the bottom, expanding the work of undercutting sharpener this moment reaches when designing base diameter, be that power rail reaches predetermined number of revolutions, expand end shoveling and finish that bottom-expanding equipment is hung out ground; C, the surflaes in the base is taken out; D, radial reinforcing bar is put into base cavity pocket and hammered into pan soil, will be in the good concrete of floor manufacture be packed long bucket into, be put into the immersed tube bottom from the immersed tube mouth, when being located at the iron staff contact pan soil of bucket bottom, the bucket bottom door is backed down, concrete in it falls into base cavity pocket and forms cast-in-situ base, is lowered to the precast reinforced concrete pile body and docks anchoring by its bottom joint bar with the Cast-in-place concrete base to be integral; E, extract immersed tube, along the slit grout injection pile of extracting behind the immersed tube.
Advantage of the present invention and effect are as follows:
The present invention compared with prior art, owing to utilized a series of technical measures such as immersed tube, bottom-expanding equipment and precast pile with metal pile head, and the advanced production technology of employing, there is process simply advanced through evidence, expand chamber, end regular geometry, needn't get pile body chamber soil, pile-forming speed is fast, the efficient height, and the ratio range that expands bottom face diameter and pile body cross section is big, effectively improve bearing capacity of single pile, and reach designing requirement, and guarantee the pile foundation engineering quality, reduce building costs, improve strength of materials utilization rate, stake is worked under most economical state; The scope of application is wide simultaneously, adopt the pile body and corresponding base-enlarging method, the plant equipment that are complementary with it to replace manually-operated according to building safety grade and different geological conditions, not only improve operating efficiency, shortened the construction period, but also obviously reduced the earth volume of cutting the earth, improved working security, accident potential appears in minimizing.
The specific embodiment
Construction foundation working method of the present invention, it is realized by following activities: a, the immersed tube that will have a metal pile head pass weak soil and are laminated to the design elevation hardpan; B, taking-up metal pile head, the mark that the detent rail pin of bottom-expanding equipment is aimed on the immersed tube mouth is lowered to immersed tube, start equipment after the equipment upper end is also fixedly positioning and expand the end, expand the end and be vertical earlier expand the end again level expand the end, stop automatically after dark when construction reaches the design mark, base cavity pocket is formed on the bottom, expanding the work of undercutting sharpener this moment reaches when designing base diameter, be that power rail reaches predetermined number of revolutions, expand end shoveling and finish that bottom-expanding equipment is hung out ground; C, the surflaes in the base is taken out; D, radial reinforcing bar is put into base cavity pocket and hammered into pan soil, will be in the good concrete of floor manufacture be packed long bucket into, be put into the immersed tube bottom from the immersed tube mouth, when being located at the iron staff contact pan soil of bucket bottom, the bucket bottom door is backed down, concrete in it falls into base cavity pocket and forms cast-in-situ base, is lowered to the precast reinforced concrete pile body and docks anchoring by its bottom joint bar with the Cast-in-place concrete base to be integral; E, extract immersed tube, along the slit grout injection pile of extracting behind the immersed tube.
Claims (1)
1, a kind of construction foundation working method is characterized in that it comprises the steps: a, the immersed tube that will have a metal pile head passes weak soil and is laminated to the design elevation hardpan; B, taking-up metal pile head, the mark that the detent rail pin of bottom-expanding equipment is aimed on the immersed tube mouth is lowered to immersed tube, start equipment after the equipment upper end is also fixedly positioning and expand the end, expand the end and be vertical earlier expand the end again level expand the end, stop automatically after dark when construction reaches the design mark, base cavity pocket is formed on the bottom, expanding the work of undercutting sharpener this moment reaches when designing base diameter, be that power rail reaches predetermined number of revolutions, expand end shoveling and finish that bottom-expanding equipment is hung out ground; C, the surflaes in the base is taken out; D, radial reinforcing bar is put into base cavity pocket and hammered into pan soil, will be in the good concrete of floor manufacture be packed long bucket into, be put into the immersed tube bottom from the immersed tube mouth, when being located at the iron staff contact pan soil of bucket bottom, the bucket bottom door is backed down, concrete in it falls into base cavity pocket and forms cast-in-situ base, is lowered to the precast reinforced concrete pile body and docks anchoring by its bottom joint bar with the Cast-in-place concrete base to be integral; E, extract immersed tube, along the slit grout injection pile of extracting behind the immersed tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134713 CN1974939A (en) | 2006-12-12 | 2006-12-12 | Construction foundation working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134713 CN1974939A (en) | 2006-12-12 | 2006-12-12 | Construction foundation working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1974939A true CN1974939A (en) | 2007-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610134713 Pending CN1974939A (en) | 2006-12-12 | 2006-12-12 | Construction foundation working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1974939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851920A (en) * | 2010-06-01 | 2010-10-06 | 武汉一冶交通工程有限责任公司 | Treatment method of elevation-exceeding part of concrete pouring pile head |
| CN101135156B (en) * | 2007-09-29 | 2011-12-14 | 童乐天 | Mechanical pile forming method for high-bearing two-stage bottom expanding prefabricated pile body |
-
2006
- 2006-12-12 CN CN 200610134713 patent/CN1974939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135156B (en) * | 2007-09-29 | 2011-12-14 | 童乐天 | Mechanical pile forming method for high-bearing two-stage bottom expanding prefabricated pile body |
| CN101851920A (en) * | 2010-06-01 | 2010-10-06 | 武汉一冶交通工程有限责任公司 | Treatment method of elevation-exceeding part of concrete pouring pile head |
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