CN1298050A - High-pressure rotating spraying bottom-spreading technology for pre-buried pipe - Google Patents
High-pressure rotating spraying bottom-spreading technology for pre-buried pipe Download PDFInfo
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- CN1298050A CN1298050A CN 00123357 CN00123357A CN1298050A CN 1298050 A CN1298050 A CN 1298050A CN 00123357 CN00123357 CN 00123357 CN 00123357 A CN00123357 A CN 00123357A CN 1298050 A CN1298050 A CN 1298050A
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- pipe
- pile
- pressure rotary
- pipe laying
- buried pipe
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Abstract
After a pile hole is formed manually or mechanically, one pre-buried pipe is set vertically in the center of the hole, a reinforcing cage is laid, and concrete is deposited to form pile with pre-buried pipe after coagulation in 2-3 days. Then, one high pressure rotary spraying mortar depositing pipe is inserted inside the pre-buried pipe to the bottom of the pile and settled to set depth by a small vibrator, and a spread pile bottom with 1.2-2.5 m diameter is formed through high pressure rotary spraying. Mortar is replenished to form the integral pile bottom-pile body structure. The present invention has fast construction speed and low pile construction cost and the constructed pile foundation has great bearing capacity.
Description
The invention belongs to a kind of building pile foundation construction technology.
Enlarged footing is one of effective ways that improve bearing capacity of pile foundation, has all brought into play certain effect as ramming expansion method, explosive expansion method, multi-branch bearing disk technology, spiral bottom-spreading technology etc.But shortcoming such as existing base-enlarging method exists construction is complicated, efficient is low, cost height and not being widely used.
Purpose of the present invention is to propose a kind of easy to operate, efficient is high, cost is low, widely applicable enlarged footing formation technology at the problems referred to above.Simultaneously, be easy to solve hand excavated pile because of meeting the difficulty that underground water produces.
The objective of the invention is to realize, that is: by following technical proposals
High-pressure rotary spray technique for enlarging base of preburied pipe comprises:
One, pile.In all kinds of filling pile constructions, mechanical pore-creating or manpower pore-creating vertically are provided with the pre-pipe laying of Φ 100-120mm along the center, hole behind the pore-forming, and pre-pipe laying lower end is at the bottom of the hole.Then, descending reinforcing cage pours into concrete again, treats that concrete solidified after 2-3 days can expand at the end.
Two, expand at the end.Base-enlarging method is that the high pressure jet grouting pipe is lowered to the pipe end along pre-pipe laying, with the small vibrating device Grouting Pipe is sink to set depth, carries out high-pressure rotary-spray simultaneously and expands the end, and the churning diameter is determined by adjusting pressure according to designing requirement.The high-pressure rotary-spray bellout diameter can reach 1.2～2.5m by triple pipe method (cohesive soil, sandy soil, gravel), and the compressive strength of enlarged footing induration adopts 425
#Can reach C during above label cement
20More than.
Three, mend slurry.Mend slurry to pre-pipe laying upper end along pre-pipe laying after expanding the bottom application worker, combine closely, prevent broken pile to guarantee pile body and enlarged footing.
High-pressure rotary spray technique for enlarging base of preburied pipe of the present invention has following advantage:
1, carries out step by step at the bottom of pile and the expansion, do not disturb mutually, thereby improved integral construction efficient.
2, operate easily at the high-pressure rotary-spray expansion end, and speed is fast, and the Grouting Pipe hoisting velocity is generally 1m/10min.
3, because bellout diameter is big, thereby increase substantially bearing capacity of pile foundation, reduce the quantity that lays out pile.
4, generally the stake footpath of large-section in-situ concrete pile can be locked in 800mm-1000mm.
5, cost is low, can reduce the pile foundation total cost significantly.
Fig. 1 is a kind of exemplary construction schematic diagram of the present invention.The invention will be further described below in conjunction with accompanying drawing.
High-pressure rotary spray technique for enlarging base of preburied pipe is included in the sandy soil layer with manually digging out hole 1, and 1 center vertically is provided with pre-pipe laying 2 along the hole, and pre-pipe laying 2 is the iron pipe of Φ 110mm.Descending reinforcing cage 3 then, pour into concrete again, concrete solidifies the pile body 4 that forms after 3 days with pre-pipe laying 2, the high pressure jet grouting pipe is lowered to the pipe end along pre-pipe laying 2, with the small vibrating device Grouting Pipe is sink to set depth, carry out high-pressure rotary-spray simultaneously and expand the end, the high-pressure rotary-spray bellout diameter is 1.4m, and the compressive strength of the enlarged footing 5 that its induration forms reaches C
20, mend slurry along pre-pipe laying 2 at last, mend extremely pre-pipe laying 2 upper ends of slurry, enlarged footing 5 and pile body 4 structures in aggregates.Pre-pipe laying 2 also can adopt tubing such as plastic pipe.
Claims (2)
1, high-pressure rotary spray technique for enlarging base of preburied pipe, comprise with artificial or mechanical hole building (1), it is characterized in that (1) center vertically is provided with pre-pipe laying (2) along the hole, descending reinforcing cage (3) then, pour into concrete again, after concrete solidifies 2-3 days, formation is with the pile body (4) of pre-pipe laying (2), the high pressure jet grouting pipe is lowered to the pipe end along pre-pipe laying (2), Grouting Pipe is sink to set depth, carry out high-pressure rotary-spray simultaneously and expand the end with the small vibrating device, its induration forms enlarged footing (5), mend slurry along pre-pipe laying (2) again, mend slurry to pre-pipe laying (2) upper end, enlarged footing (5) and pile body (4) structure in aggregates.
2, high-pressure rotary spray technique for enlarging base of preburied pipe according to claim 1 is characterized in that described pre-pipe laying (2) is an iron pipe, also can be plastic pipe, and its diameter is 100-120mm; Described high-pressure rotary-spray bellout diameter is 1.2-2.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123357 CN1298050A (en) | 2000-12-04 | 2000-12-04 | High-pressure rotating spraying bottom-spreading technology for pre-buried pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123357 CN1298050A (en) | 2000-12-04 | 2000-12-04 | High-pressure rotating spraying bottom-spreading technology for pre-buried pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1298050A true CN1298050A (en) | 2001-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00123357 Pending CN1298050A (en) | 2000-12-04 | 2000-12-04 | High-pressure rotating spraying bottom-spreading technology for pre-buried pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1298050A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669337A (en) * | 2013-11-22 | 2014-03-26 | 宁波鸿晨建设有限公司 | Head-expansion long spiral drilling pressure irrigation pile and construction method and construction device thereof |
| CN105714770A (en) * | 2016-02-05 | 2016-06-29 | 云南建工基础工程有限责任公司 | Reinforced type cast-in-situ bored pile structure and construction method thereof |
| CN109083143A (en) * | 2018-09-27 | 2018-12-25 | 上海勘察设计研究院(集团)有限公司 | A kind of preexisting hole burried pipe grouting aperture slurry seal construction method and constructing device |
-
2000
- 2000-12-04 CN CN 00123357 patent/CN1298050A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669337A (en) * | 2013-11-22 | 2014-03-26 | 宁波鸿晨建设有限公司 | Head-expansion long spiral drilling pressure irrigation pile and construction method and construction device thereof |
| CN105714770A (en) * | 2016-02-05 | 2016-06-29 | 云南建工基础工程有限责任公司 | Reinforced type cast-in-situ bored pile structure and construction method thereof |
| CN109083143A (en) * | 2018-09-27 | 2018-12-25 | 上海勘察设计研究院(集团)有限公司 | A kind of preexisting hole burried pipe grouting aperture slurry seal construction method and constructing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |