CN105297755A - High-pressure water aid-sinking type construction device of open caisson - Google Patents
High-pressure water aid-sinking type construction device of open caisson Download PDFInfo
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- CN105297755A CN105297755A CN201510667280.6A CN201510667280A CN105297755A CN 105297755 A CN105297755 A CN 105297755A CN 201510667280 A CN201510667280 A CN 201510667280A CN 105297755 A CN105297755 A CN 105297755A
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- steel pipe
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- open caisson
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Abstract
The invention relates to a high-pressure water aid-sinking type construction device of an open caisson. The device comprises a high pressure water pump, flowing pipelines and steel pipes. During manufacturing the wall of the open caisson, the steel pipes are correspondingly distributed and mounted at two inner sides of the wall of the caisson, wherein the steel pipes are uniformly arranged at intervals of 4 to 6m along the wall of the caisson; in addition, the steel pipes extend to a blade foot from top to bottom; an upper end port of each steel pipe is connected to the high pressure water pump through the corresponding flowing pipeline; high pressure water can be pressed into the steel pipes through the high pressure water pump in order to damage earth at the inside and outside of the blade foot of the open caisson when the open caisson is blocked and stopped sinking, so that the sinking resistance can be reduced. According to the device, high pressure water is pressed to two sides of the blade foot to aid sinking, thus improving the construction efficiency of the traditional water aid-sinking method.
Description
Technical field
The present invention relates to a kind of building open caisson construction equipment, to be particularly a kind ofly applicable to compared with the open caisson construction equipment in hard formation.
Background technology
It is large that open caisson has rigidity, and the plurality of advantages such as bearing capacity is high, impermeability is strong, become one of city large underground structure and the most important form of construction work of deep foundation.Still some insoluble technical problems are had in certain open caisson construction.Such as, when in sinking watching, when running into sand, sand gravel layer or sand pebble layer, often there will be open caisson and be difficult to continue the problem of sinking, current open caisson assists the measure of sinking mainly to comprise jetting sinking method, thixotropic slurry retaining wall sinking method, ballast sinking method etc.The equipment that the open caisson jetting sinking method of current use uses still is one-sided jetting equipment, there is efficiency of construction low, helps the problem of heavy poor effect.
Summary of the invention
The present invention will provide a kind of open caisson water under high pressure to help heavy construction equipment, open caisson jetting sinking equipment is improved, steel pipe is installed in advance by outside in sword pin, by high-pressure hydraulic pump, wash away soil layer in sword pin both sides, effectively can reduce the penetration resistance at sword pin place, increase the subsidence factor of open caisson, and help heavy equipment easy for installation, do not hinder the sinking construction of open caisson in borehole wall inside.
Technical scheme of the present invention: a kind of open caisson water under high pressure helps heavy construction equipment, comprise high-pressure hydraulic pump, circulation duct, steel pipe, when caisson wall makes, in the borehole wall, steel pipe is installed in both sides distribution, and steel pipe should be evenly arranged along the borehole wall, arrangement pitch is 4m ~ 6m, and steel pipe should extend sword pin place from top to bottom; The upper port of every root steel pipe connects high-pressure hydraulic pump by circulation duct, for open caisson run into sinking be obstructed time, in steel pipe, be pressed into by high-pressure hydraulic pump the soil body that water under high pressure destroys outside in caisson cutting edge, reduce penetration resistance.
Described steel pipe is stainless-steel pipe, and steel pipe is equipped with one way valve, and nominal diameter of steel pipe is 40mm ~ 120mm, and the delivery port distance sword sole end of steel pipe is 100mm ~ 300mm..
Described circulation duct material is PVC or PRR material, and its internal diameter should match with described steel pipe.
In sand, the high water pressure that described high-pressure hydraulic pump is pressed in steel pipe is 0.4MPa ~ 0.6MPa; In sand gravel layer, the high water pressure that high-pressure hydraulic pump is pressed in steel pipe is 0.6MPa ~ 1.2MPa; In sand pebble layer, the high water pressure that high-pressure hydraulic pump is pressed in steel pipe is 8MPa ~ 20MPa.The highest hydraulic pressure of high-pressure hydraulic pump is 1.5 times ~ 2 times that help heavy hydraulic pressure.
Beneficial effect of the present invention: heavy by helping at sword pin both sides water under high pressure, improves tradition and helps heavy efficiency of construction under water.
Accompanying drawing explanation
Fig. 1 is the main sectional view that open caisson water under high pressure helps heavy construction equipment;
Fig. 2 is the left sectional view that open caisson water under high pressure helps heavy construction equipment to dispose;
Fig. 3 is sword pin place steel pipe schematic diagram;
Fig. 4 is that water under high pressure helps heavy steel pipe schematic diagram used.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.
As shown in Figure 1 to Figure 3, a kind of open caisson water under high pressure helps heavy construction equipment, comprises high-pressure hydraulic pump 6, circulation duct 5, steel pipe.
When caisson wall makes, in the borehole wall 1, steel pipe is installed in both sides distribution, and steel pipe should be evenly arranged along the borehole wall 1, and arrangement pitch is 4m ~ 6m, and steel pipe should extend sword pin 2 place from top to bottom; The upper port of every root steel pipe connects high-pressure hydraulic pump 6 by circulation duct 5, for open caisson run into sinking be obstructed time, in steel pipe, be pressed into by high-pressure hydraulic pump the soil body that water under high pressure destroys outside in caisson cutting edge, reduce penetration resistance.
Steel pipe is stainless-steel pipe, steel pipe is equipped with one way valve 7, and nominal diameter of steel pipe is 40mm ~ 120mm, and the delivery port 8 of steel pipe is 100mm ~ 300mm. apart from sword pin 2 bottom.Circulation duct 5 material is PVC or PRR material, and its internal diameter should match with described steel pipe.Steel pipe two ends are respectively equipped with socket 9 and bellmouth 10 (see Fig. 4).
In sand, the high water pressure that high-pressure hydraulic pump 6 is pressed in steel pipe is 0.4MPa ~ 0.6MPa; In sand gravel layer, the high water pressure that high-pressure hydraulic pump 6 is pressed in steel pipe is 0.6MPa ~ 1.2MPa; In sand pebble layer, the high water pressure that high-pressure hydraulic pump 6 is pressed in steel pipe is 8MPa ~ 20MPa.The highest hydraulic pressure of high-pressure hydraulic pump 6 is 1.5 times ~ 2 times that help heavy hydraulic pressure.
Equipment involved in the present invention is mainly positioned at the borehole wall and sword pin, and concrete technical scheme is as follows:
1. water under high pressure helps heavy construction equipment primarily of high-pressure hydraulic pump, circulation duct, steel pipe composition.Equipment needed thereby should meet designing requirement.
2., in sand, high water pressure is preferably 0.4MPa ~ 0.6MPa; In sand gravel layer, high water pressure is preferably 0.6MPa ~ 1.2MPa; In sand pebble layer, high water pressure is preferably 8MPa ~ 20MPa.
3. the highest hydraulic pressure of high-pressure hydraulic pump should help heavy hydraulic pressure to select according to required, is preferably 1.5 times ~ 2 times that help heavy hydraulic pressure.
4. steel pipe is stainless-steel pipe, and nominal diameter is 40mm ~ 120mm, and the delivery port 8 of steel pipe is apart from sword pin 2 bottom 100mm ~ 300mm..
5. steel pipe is equipped with one way valve 7, the size of one way valve 7 should be mated in steel pipe.
6. circulation duct 5 material is PVC or PRR material, and internal diameter should match with steel pipe used.
7., when caisson wall makes, in the borehole wall 1, steel pipe is installed in both sides distribution in advance, and steel pipe evenly should be installed along the borehole wall 1, and arrangement pitch is preferably 4m ~ 6m, and should extend sword pin 2 place from top to bottom;
If 8. run into sinking when being obstructed, in steel pipe, be pressed into by high-pressure hydraulic pump 6 soil body that water under high pressure destroys outside in caisson cutting edge 2 in the upper port of every root steel pipe, reduce penetration resistance.
Upper Reaches of Huangpu River former water branch line engineering is the branch line engineering of Upper Reaches of Huangpu River water head site communicating pipe engineering.This engineering adopts pipe pushing technology to carry out constructing tunnel, and upper pipe working well and received well adopt fetching water construction.This project water under high pressure taken in the present invention helps heavy equipment, serves and helps heavy effect preferably.
High pressure helps the installation of heavy construction equipment and uses flow process as follows:
1, according to Fig. 1, shown in 2, inside and outside the borehole wall 1, both sides are evenly arranged outside steel pipe 3 and inner side steel pipe 4, the long 4.5m of outside steel pipe, the long 4m of inner side steel pipe, each root steel pipe is connected with high-pressure hydraulic pump 6 through circulation duct 5, circulation duct 5 is PVC pipeline, and intensity meets pressure requirements.Steel pipe adopts the stainless steel pipe of nominal diameter 120mm to be formed by connecting, and fastener for connection adopts and is threaded, and before steel pipe is installed, has carried out strength test and leak test, with leakproof pressure.
2, the delivery port 8 of steel pipe is apart from 200mm bottom sword pin 2, arranges one way valve 7 bottom steel pipe, and model is QH41.
3, because the soil property at this project caisson cutting edge place is sand gravel layer, the high water pressure therefore selected is 1MPa, and the high-pressure hydraulic pump maximum pump pressure selected is 1.6MPa, and high-pressure hydraulic pump model is URACAP3-45, meets and helps heavy requirement.Water under high pressure flows out from outside steel pipe 3 and inner side steel pipe 4, washes away the hard soil at sword pin place, and according to engineering practice, flushing time is 30min, destroys the soil body at sword pin place, decreases the penetration resistance at sword pin place, makes open caisson can continue to sink.
4, water under high pressure help heavy measure to ensure open caisson can sink down into design attitude, if do not reach requirement, should continue adopt water under high pressure help heavy, if desired, can appropriateness increase high water pressure.
5, the steel pipe in fact in the present invention does not need to enable completely, should use according to actual conditions symmetry.
6, the diameter of steel tube in fact in the present invention, the height of arrangement pitch and distance sword sole end should carry out checking computations according to actual conditions and obtain.
7, in real process, when utilizing water under high pressure to help heavy, the auxiliary sinking of ballast sinking method can still be adopted.
Claims (5)
1. an open caisson water under high pressure helps heavy construction equipment, comprise high-pressure hydraulic pump (6), circulation duct (5), steel pipe, it is characterized in that: when caisson wall makes, in the borehole wall (1), steel pipe is installed in both sides distribution, and steel pipe should be evenly arranged along the borehole wall (1), arrangement pitch is 4m ~ 6m, and steel pipe should extend sword pin (2) place from top to bottom; The upper port of every root steel pipe connects high-pressure hydraulic pump (6) by circulation duct (5), for open caisson run into sinking be obstructed time, in steel pipe, be pressed into by high-pressure hydraulic pump the soil body that water under high pressure destroys outside in caisson cutting edge, reduce penetration resistance.
2. open caisson water under high pressure according to claim 1 helps heavy construction equipment, it is characterized in that: described steel pipe is stainless-steel pipe, one way valve (7) steel pipe is equipped with, nominal diameter of steel pipe is 40mm ~ 120mm, and delivery port (8) distance sword pin (2) bottom of steel pipe is 100mm ~ 300mm..
3. open caisson water under high pressure according to claim 1 helps heavy construction equipment, it is characterized in that: described circulation duct (5) material is PVC or PRR material, and its internal diameter should match with described steel pipe.
4. open caisson water under high pressure according to claim 1 helps heavy construction equipment, it is characterized in that: in sand, and the high water pressure that described high-pressure hydraulic pump (6) is pressed in steel pipe is 0.4MPa ~ 0.6MPa; In sand gravel layer, the high water pressure that high-pressure hydraulic pump (6) is pressed in steel pipe is 0.6MPa ~ 1.2MPa; In sand pebble layer, the high water pressure that high-pressure hydraulic pump (6) is pressed in steel pipe is 8MPa ~ 20MPa.
5. open caisson water under high pressure according to claim 1 helps heavy construction equipment, it is characterized in that: the highest hydraulic pressure of described high-pressure hydraulic pump (6) is 1.5 times ~ 2 times that help heavy hydraulic pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510667280.6A CN105297755A (en) | 2015-10-16 | 2015-10-16 | High-pressure water aid-sinking type construction device of open caisson |
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| CN201510667280.6A CN105297755A (en) | 2015-10-16 | 2015-10-16 | High-pressure water aid-sinking type construction device of open caisson |
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| CN105297755A true CN105297755A (en) | 2016-02-03 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083200A (en) * | 2018-08-16 | 2018-12-25 | 温州东联市政工程有限公司 | A kind of Submersed type inspection well and its construction method |
| CN109469082A (en) * | 2018-11-22 | 2019-03-15 | 国家电网有限公司 | A kind of open caisson construction equipment and construction method |
| CN109487809A (en) * | 2018-12-06 | 2019-03-19 | 中信重工机械股份有限公司 | A kind of caisson cutting edge with sealing brush |
| CN109930498A (en) * | 2019-04-09 | 2019-06-25 | 南京林业大学 | A kind of method of disposal for going deep into bed stabilization bridge vertical member |
| CN110820783A (en) * | 2019-11-13 | 2020-02-21 | 中铁第四勘察设计院集团有限公司 | Soft soil area bin-type mud-water balance open caisson underground space system |
| CN111197316A (en) * | 2020-03-06 | 2020-05-26 | 中交第四航务工程勘察设计院有限公司 | Novel circular double-wave steel open caisson structure |
| CN111622775A (en) * | 2020-06-08 | 2020-09-04 | 北京市轨道交通建设管理有限公司 | Hydraulic cutting resistance-reducing pre-supporting device and hydraulic cutting system |
| CN115110538A (en) * | 2022-06-01 | 2022-09-27 | 中国一冶集团有限公司 | Light well point and steel sleeve box combined dewatering support construction method |
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| JPS5616733A (en) * | 1979-07-20 | 1981-02-18 | Takuo Mochizuki | Caisson method |
| CN2611437Y (en) * | 2003-04-09 | 2004-04-14 | 王民寿 | Headframe structure with fast open caisson |
| CN101845820A (en) * | 2009-10-10 | 2010-09-29 | 中交二公局第二工程有限公司 | Sinking-assistant construction method for sinking sunk well |
| CN102182186A (en) * | 2011-04-28 | 2011-09-14 | 中交第一航务工程局有限公司 | Water-flushing sinking-assisting system and construction technical method thereof |
| CN103088837A (en) * | 2013-02-27 | 2013-05-08 | 上海市基础工程有限公司 | Mud anti-drag sink-assisting device in open caisson sinking construction |
| CN103114603A (en) * | 2013-02-27 | 2013-05-22 | 上海市基础工程有限公司 | Air curtain resistance reducing and sinking assisting device utilized during sinking construction for sinking well |
| CN204112351U (en) * | 2014-07-22 | 2015-01-21 | 中国市政工程华北设计研究总院有限公司 | The sinking servicing unit of open caisson |
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2015
- 2015-10-16 CN CN201510667280.6A patent/CN105297755A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5616733A (en) * | 1979-07-20 | 1981-02-18 | Takuo Mochizuki | Caisson method |
| CN2611437Y (en) * | 2003-04-09 | 2004-04-14 | 王民寿 | Headframe structure with fast open caisson |
| CN101845820A (en) * | 2009-10-10 | 2010-09-29 | 中交二公局第二工程有限公司 | Sinking-assistant construction method for sinking sunk well |
| CN102182186A (en) * | 2011-04-28 | 2011-09-14 | 中交第一航务工程局有限公司 | Water-flushing sinking-assisting system and construction technical method thereof |
| CN103088837A (en) * | 2013-02-27 | 2013-05-08 | 上海市基础工程有限公司 | Mud anti-drag sink-assisting device in open caisson sinking construction |
| CN103114603A (en) * | 2013-02-27 | 2013-05-22 | 上海市基础工程有限公司 | Air curtain resistance reducing and sinking assisting device utilized during sinking construction for sinking well |
| CN204112351U (en) * | 2014-07-22 | 2015-01-21 | 中国市政工程华北设计研究总院有限公司 | The sinking servicing unit of open caisson |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083200A (en) * | 2018-08-16 | 2018-12-25 | 温州东联市政工程有限公司 | A kind of Submersed type inspection well and its construction method |
| CN109469082A (en) * | 2018-11-22 | 2019-03-15 | 国家电网有限公司 | A kind of open caisson construction equipment and construction method |
| CN109487809A (en) * | 2018-12-06 | 2019-03-19 | 中信重工机械股份有限公司 | A kind of caisson cutting edge with sealing brush |
| CN109487809B (en) * | 2018-12-06 | 2023-11-07 | 中信重工机械股份有限公司 | Open caisson cutting edge with sealing brush |
| CN109930498A (en) * | 2019-04-09 | 2019-06-25 | 南京林业大学 | A kind of method of disposal for going deep into bed stabilization bridge vertical member |
| CN110820783A (en) * | 2019-11-13 | 2020-02-21 | 中铁第四勘察设计院集团有限公司 | Soft soil area bin-type mud-water balance open caisson underground space system |
| CN111197316A (en) * | 2020-03-06 | 2020-05-26 | 中交第四航务工程勘察设计院有限公司 | Novel circular double-wave steel open caisson structure |
| CN111622775A (en) * | 2020-06-08 | 2020-09-04 | 北京市轨道交通建设管理有限公司 | Hydraulic cutting resistance-reducing pre-supporting device and hydraulic cutting system |
| CN115110538A (en) * | 2022-06-01 | 2022-09-27 | 中国一冶集团有限公司 | Light well point and steel sleeve box combined dewatering support construction method |
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Application publication date: 20160203 |
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