CN102400467A - Cofferdam construction method for inserting and driving steel plate pile with assistance of high-pressure water jetting - Google Patents
Cofferdam construction method for inserting and driving steel plate pile with assistance of high-pressure water jetting Download PDFInfo
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- CN102400467A CN102400467A CN2011103735966A CN201110373596A CN102400467A CN 102400467 A CN102400467 A CN 102400467A CN 2011103735966 A CN2011103735966 A CN 2011103735966A CN 201110373596 A CN201110373596 A CN 201110373596A CN 102400467 A CN102400467 A CN 102400467A
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Abstract
The invention belongs to the technical field of large-volume bearing platform cofferdam construction, in particular relates to a cofferdam construction method for inserting and driving a steel plate pile with the assistance of high-pressure water jetting, and solves the problems that the steel plate pile is difficultly driven, the penetration speed is low, and driving equipment, the steel plate pile and the like are greatly damaged in a thick and round gravel soil hardened layer in the conventional construction process. The method comprises the following steps that: a seamless steel pipe is adopted, one end of the seamless steel pipe is taken as a water outlet end and processed into an ellipse, and the other end of the seamless steel pipe is taken as a water inlet end and processed into a spiral sleeve; a manufactured high-pressure water gun is vertically welded in the center of a steel plate pile groove; the water inlet end of the high-pressure water gun is connected with a high-pressure water pump through a connecting sleeve; and the high-pressure water gun jets water and a vibration hammer vibrates the steel plate pile downwards at the same time when the steel plate pile is driven. The manufacturing material of high-pressure water jetting equipment is simple and easy to find, and the high-pressure water jetting equipment is convenient to manufacture and safely and simply operated.
Description
Technical field
The invention belongs to the technical field of big volume cushion cap cofferdam construction, be specifically related to the auxiliary steel sheet pile cofferdam construction method of beating of inserting of a kind of water jetting at high pressure.
Background technology
Steel sheet pile began in Europe to produce in 20 beginnings of the century, and 1903, Japan adopted in the retaining soil construction in this shop of Mitsui through import first, and based on the special functional performance of steel sheet pile, nineteen twenty-three, Japan's a large amount of imports in the big earthquake calamity reinstatement works in the Northeast are adopted.Steel sheet pile is initial to have the light-duty and hot rolling type of cold bending thin wall, because the former has bigger processing, use limitation, thereby the hot-rolled steel sheet pile becomes the main flow of steel sheet pile production development.The 1950's, China in the railroad bridge cofferdam construction, introduces use by bridge office of the Ministry of Railways from the former Soviet Union first.Along with China's rapid economy development, this building worker's method quick, efficient, environmental protection of steel sheet pile is more widely used in many Important Project project constructions, and has obtained favorable social and economic benefits.Steel sheet pile is factory's finished product, and quality such as intensity, quality, seam precision are guaranteed, and reliability is high, and has durability preferably, can repeat turnover and use, and have characteristics such as easy construction, duration weak point.But when thick circle gravel soil hardening layer geology section is constructed, existing steel sheet pile construction technology injection difficulty, drilling depth is slower, and bigger to infringements such as injection equipment, steel sheet piles.
Summary of the invention
The present invention for solve in the existing steel sheet pile construction technology injection difficulty of thick circle gravel soil hardening layer, drilling depth is slow and to injection equipment, problem that the steel sheet pile equivalent damage is bigger, the job practices of the auxiliary injection steel sheet pile of a kind of water jetting at high pressure is provided.
The present invention adopts following technical scheme to realize:
Auxiliary the inserting of a kind of water jetting at high pressure beaten the steel sheet pile cofferdam construction method, and its step is following:
1), the water jetting at high pressure system makes,
1.1), giant makes, and adopts seamless steel pipe, as the water side and be processed into ellipse, the other end of seamless steel pipe is as water inlet end and be processed into threaded sleeve with an end of seamless steel pipe,
1.2), the giant of making vertically is welded to the central authorities of steel sheet pile groove,
1.3), adopt branch sleeve that the water inlet end of giant is linked to each other with high-pressure hydraulic pump,
2), water jetting at high pressure system supplymentary injection steel sheet pile,
During the injection steel sheet pile,, adopt vibrating hammer down to vibrate on one side on one side through the giant jetting,
3), excavation of foundation pit,
4), support in the steel sheet pile and install,
5), the steel sheet-pile cofferdam back cover, draw water.
The present invention because: 1), water jetting at high pressure the clay between thick circle gravel soil of hardening that can liquefy, have very the person can be with round gravel soil slightly towards broken; 2), the water that penetrates of water jetting at high pressure can form lubrication with slightly justifying between the gravel soil at steel sheet pile, thereby reduce frictional resistance effectively; Thereby solved in the existing steel sheet pile construction technology injection difficulty of thick circle gravel soil hardening layer, drilling depth is slow and to injection equipment, problem that the steel sheet pile equivalent damage is bigger; Water jetting at high pressure equipment making material is simple and easy to look in addition, and is easy to make, and handling safety is simple.
Description of drawings
Fig. 1 is a process chart of the present invention
Fig. 2 is the structural representation of water jetting at high pressure rifle
Fig. 3 is the main TV structure sketch map of water jetting at high pressure steel sheet pile
Fig. 4 is the lateral view of Fig. 3
Fig. 5 is the sketch map of water jetting at high pressure system supplymentary injection steel sheet pile
Among the figure: 1-steel sheet pile, 2-giant, 3-crane, 4-vibrating hammer, 5-high-pressure water pipe, 6-high-pressure hydraulic pump, the common water pipe of 7-.
The specific embodiment
Be described further in conjunction with the accompanying drawing specific embodiments of the invention.
Embodiment: the stratum is thick circle gravel hardening layer, and frictional resistance is 650Kpa.Adopt the job practices of conventional injection steel sheet-pile cofferdam, the 90KW vibrating hammer is difficult to make the smooth injection of steel sheet pile to finish steel sheet pile.
Adopt auxiliary the inserting of water jetting at high pressure to beat the steel sheet pile cofferdam construction method, its process chart, as shown in Figure 1.Concrete steps are following:
1, the water jetting at high pressure system makes,
1), giant 2 makes, the employing internal diameter is 15mm, wall thickness is the common seamless steel pipe of 0.5mm, the length of every steel pipe is confirmed as 12m according to the length of steel sheet pile.After the material preparation, ellipse is processed in the water side of steel pipe, oval width is controlled at 2mm, and water inlet end is processed into screw shell, and is as shown in Figure 2.
2), giant 2 made, and it vertically is welded to steel sheet pile 1 groove central authorities, welding is wanted firmly, and guarantees to prevent that steel pipe from being welded leakage, like Fig. 3, shown in 4.The water jetting at high pressure steel sheet pile that completes neatly is placed in the job site.
3), the water jetting at high pressure system links to each other with high-pressure hydraulic pump,
Adopt branch sleeve that the water inlet end of giant 2 is linked to each other with high-pressure hydraulic pump 6.
2, water jetting at high pressure system supplymentary injection steel sheet pile
During the injection steel sheet pile,, adopt 90Kw vibrating hammer 4 down to vibrate on one side on one side through giant 2 jettings.Through this construction technology, can effectively shorten construction period.Insert the friction between fore shaft and the seepage of minimizing steel sheet-pile cofferdam when beating, coating butter mixture ointment in the steel sheet pile fore shaft in order to reduce.
3, excavation of foundation pit
At first adopt common excavator that the excavation of foundation pit scope is excavated; During excavation of foundation pit to ground level-2.0m; The first road steel is installed is enclosed purlin; The interior support by the steel pipe support of HW400 * 400 * 15 * 15 shaped steel collar tie beams and φ 630 * 12 formed, and elevation is installed is-1.5m (supposing that ground elevation is 0).Then, adopt high-front shovel to proceed to be excavated to-5.5m, the second road steel is installed is enclosed purlin.The second road steel encloses after purlin installs, and continues to be excavated to down 50cm of cushion cap bottom surface, and promptly the excavation pit elevation is-10m (supposing that ground elevation is 0).At last, adopt the C30 concrete to carry out back cover, bottom concrete thickness calculates according to head difference inside and outside the steel sheet-pile cofferdam and gets.This engineering bottom concrete thickness is 60cm.
4, support installation in the steel sheet pile
Can know that through calculating twice are set encloses the stability requirement that purlin can satisfy steel sheet pile, be provided with when enclosing purlin and add oblique Eight characters support that enclose purlin and adopt HW400 * 400 * 15 * 15 shaped steel, bearing diagonal adopts 630 * 12 steel pipes at four rotation angle positions.Enclose purlin elevation is installed is respectively-1.5m, 5.0m.Enclose purlin and install and fix, at first the short shaped steel bracket carriage that encloses the purlin deadweight is born in welding below the installation site, and it is fixing near welding to enclose purlin and steel sheet pile then, and it is 5.0 meters that bracket is provided with spacing.It is emphasized that for part Larsen steel sheet pile side and enclose the space that exists between the purlin, must prevent to become flexible and drop with the bquster of different-thickness and steel plate with space jam-pack and firm welding.
5, the steel sheet-pile cofferdam back cover, draw water
The steel sheet pile bottom concrete is the bearing platform construction platform, back cover concrete cast and reach certain intensity after, carry out bearing platform construction after draining water.Bottom concrete adopts the C30 early strength concrete.
Claims (1)
1. auxiliary the inserting of water jetting at high pressure beaten the steel sheet pile cofferdam construction method, it is characterized in that step is following:
1), the water jetting at high pressure system makes,
1.1), giant (2) makes, and adopts seamless steel pipe, as the water side and be processed into ellipse, the other end of seamless steel pipe is as water inlet end and be processed into threaded sleeve with an end of seamless steel pipe,
1.2), the giant of making (2) is welded to steel sheet pile (1) central authorities,
1.3), adopt branch sleeve that the water inlet end of giant (2) is linked to each other with high-pressure hydraulic pump (6),
2), water jetting at high pressure system supplymentary injection steel sheet pile,
During the injection steel sheet pile,, adopt vibrating hammer (4) down to vibrate on one side on one side through giant (2) jetting,
3), excavation of foundation pit,
4), support in the steel sheet pile and install,
5), the steel sheet-pile cofferdam back cover, draw water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103735966A CN102400467A (en) | 2011-11-22 | 2011-11-22 | Cofferdam construction method for inserting and driving steel plate pile with assistance of high-pressure water jetting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103735966A CN102400467A (en) | 2011-11-22 | 2011-11-22 | Cofferdam construction method for inserting and driving steel plate pile with assistance of high-pressure water jetting |
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| CN102400467A true CN102400467A (en) | 2012-04-04 |
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| CN2011103735966A Pending CN102400467A (en) | 2011-11-22 | 2011-11-22 | Cofferdam construction method for inserting and driving steel plate pile with assistance of high-pressure water jetting |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104136A (en) * | 2013-01-29 | 2013-05-15 | 中国水产科学研究院东海水产研究所 | Simply-equipped rapid mud flat enclosure mesh arrangement method |
| CN108360520A (en) * | 2018-02-02 | 2018-08-03 | 中国十七冶集团有限公司 | The constructing device of impacting with high pressure ability of swimming Larsen steel sheet pile |
| CN108978633A (en) * | 2018-06-28 | 2018-12-11 | 中交上海航道局有限公司 | A kind of steel sheet pile inserting piling supplementary structure |
| CN109113082A (en) * | 2018-08-08 | 2019-01-01 | 中交第三航务工程局有限公司南京分公司 | One kind water knife in hardpan assists sinking steel sheet pile technique |
| CN113737796A (en) * | 2021-09-07 | 2021-12-03 | 江苏兴宇建设集团有限公司 | Construction method for high-pressure water flushing assisted pile driving and pile pulling synchronous grouting of steel plate pile |
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| JP2011184852A (en) * | 2010-03-04 | 2011-09-22 | Yuji Kaneko | Method and equipment for jacking sheet pile, and the sheet pile for use in the method |
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2011
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104136A (en) * | 2013-01-29 | 2013-05-15 | 中国水产科学研究院东海水产研究所 | Simply-equipped rapid mud flat enclosure mesh arrangement method |
| CN103104136B (en) * | 2013-01-29 | 2016-03-30 | 中国水产科学研究院东海水产研究所 | A kind of beach enclosure of simple and fast establishes network method |
| CN108360520A (en) * | 2018-02-02 | 2018-08-03 | 中国十七冶集团有限公司 | The constructing device of impacting with high pressure ability of swimming Larsen steel sheet pile |
| CN108978633A (en) * | 2018-06-28 | 2018-12-11 | 中交上海航道局有限公司 | A kind of steel sheet pile inserting piling supplementary structure |
| CN109113082A (en) * | 2018-08-08 | 2019-01-01 | 中交第三航务工程局有限公司南京分公司 | One kind water knife in hardpan assists sinking steel sheet pile technique |
| CN113737796A (en) * | 2021-09-07 | 2021-12-03 | 江苏兴宇建设集团有限公司 | Construction method for high-pressure water flushing assisted pile driving and pile pulling synchronous grouting of steel plate pile |
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Application publication date: 20120404 |