CN204475337U - A kind of hole pressure counter-force steel pipe pile pile pulling device - Google Patents
A kind of hole pressure counter-force steel pipe pile pile pulling device Download PDFInfo
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- CN204475337U CN204475337U CN201520090818.7U CN201520090818U CN204475337U CN 204475337 U CN204475337 U CN 204475337U CN 201520090818 U CN201520090818 U CN 201520090818U CN 204475337 U CN204475337 U CN 204475337U
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Abstract
The utility model relates to the bracing of foundation pit in geotechnical engineering field and counter-force steel pipe pile pile pulling device is pressed in a kind of hole in pile foundation engineering field, this pile pulling device utilizes the sidewall of steel pipe pile (1), seals the soil body (2) in stake plug (3), steel pipe pile, fluid storage chamber (9) is surrounded in steel pipe pile (1), by continuing injecting gas or liquid in fluid storage chamber (9), increase the pressure of fluid storage chamber (9) interior gas or liquid, the pore water pressure of the soil body in steel pipe pile (2) or pore air pressure are increased; And be passed to sealing stake plug (3), thus produce pile pulling power or carry out steel pipe pile (1) as a part for pile pulling power and extract construction, this device also may be used for the anti-pulling capacity test of steel pipe pile (1), pile pulling device is little, cost is low, and can solve pile pulling band soil to a difficult problem for surrounding enviroment impact.
Description
Technical field
The present invention relates to the bracing of foundation pit in geotechnical engineering field and pile foundation engineering field.
Background technology
Extracting of steel pipe pile is one of key technology in the bracing of foundation pit in geotechnical engineering field and pile foundation engineering field, the extracting construction and can realize the recycling of steel pipe pile of steel pipe pile, to saving engineering cost, reduces the consumption of constructional materials and possesses very important construction value.Current conventional steel pipe pile method for pulling out mainly comprises static(al) pile pulling method and vibration pile pulling method, and these two kinds of method pile pulling costs are high and native with pile pulling band, have a certain impact to surrounding enviroment.In addition, the vertically pulling-resistant bearingtest of current steel pipe pile mainly adopts static load test method or equilibrium method to carry out pile pulling, and experimentation cost is high.For the steel pipe pile used in Large Steel pile tube and ocean engineering, experimentation cost is very expensive especially.
Utility model content
First object of the present invention is to provide the first hole to press counter-force steel pipe pile pile extracting method, this hole pressure counter-force steel pipe pile pile extracting method can give full play to the soil body in stake provides counter-force effect in pile pulling process, and pile pulling band soil problem can be solved, little on surrounding enviroment impact, machinery used is little, and pile pulling cost is low.
This first hole pressure counter-force steel pipe pile pile extracting method comprises the following steps:
A) locate steel pipe pile to be pulled out, and complete the installation of the sealing stake plug on steel pipe pile;
B) utilize the soil body in the sidewall of steel pipe pile, sealing stake plug, steel pipe pile, in steel pipe pile, form fluid storage chamber;
C) to one or both combinations in injecting gas, liquid in fluid storage chamber;
D) by continuing injecting gas or liquid in fluid storage chamber, the pressure of fluid storage intracavity gas or liquid is increased;
E) pore water pressure of the soil body in steel pipe pile or pore air pressure is made to increase;
F) utilize the gas in injection fluid storage chamber or liquid, the pore water pressure of the soil body in steel pipe pile or pore air pressure are passed to the sealing stake plug be positioned on steel pipe pile;
G) utilize and act on sealing stake gas beyond the Great Wall or fluid pressure as pile pulling power or carry out steel pipe pile as a part for pile pulling power and extract construction.
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned hole, the step g above-mentioned) in, at steel pipe pile top, vibrating hammer can be installed, reduce pile extraction resistance by the vibration of vibrating hammer.
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned hole, the step g above-mentioned) in, can be applied with on steel pipe pile and pull out active force assistance pile pulling construction.
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned hole, the step g above-mentioned) in, while pile pulling, steel pipe pile peripheral ground can be utilized to provide counter-force to assist pile pulling construction, reduces pile pulling band soil outside steel pipe pile simultaneously.
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned hole, step f above-mentioned) in, the pressure of the gas in fluid storage chamber or liquid can be increased to and can form thin layer air film or moisture film between steel pipe pile sidewall and the soil body, reduce pile pulling power and the impact of pile pulling band soil of steel pipe pile.
Second object of the present invention is the pile pulling device providing a kind of hole to press counter-force steel pipe pile pile extracting method used, this pile pulling device can implement hole pressure counter-force steel pipe pile pile extracting method fast smoothly, and can solve pile pulling band soil problem, little on surrounding enviroment impact, machinery used is little, and pile pulling cost is low.
This pile pulling device comprises sealing stake plug, steel pipe pile, the soil body in steel pipe pile, fluid storage chamber, fluid-transporting tubing, fluid injector six part, wherein sealing stake plug is firmly to be connected with the sidewall of steel pipe pile and can the structure of shutoff steel pipe pile internal cavity, steel pipe pile is be arranged in the component of Rock And Soil with hollow tubular structure, fluid storage chamber is by sealing stake plug, the sidewall of steel pipe pile, the space that in steel pipe pile, the soil body encloses, fluid-transporting tubing is tubular structure gas or liquid being injected fluid storage chamber, fluid injector is the utensil by being injected fluid storage chamber after pressurized with fluid by fluid-transporting tubing.
In above-mentioned pile pulling device, above-mentioned fluid injector can be the one or more combination in air compressor, water pump, oil pump.
In above-mentioned pile pulling device, can increase and the plant equipment of uplift force can be provided to assist pile pulling.
In above-mentioned pile pulling device, on steel pipe pile, vibrating hammer can be installed, to reduce pile extraction resistance.
In above-mentioned pile pulling device, above-mentioned sealing stake plug is made up of baffle plate, cover plate, cushion three part.
In above-mentioned pile pulling device, can install for improving the reinforcement bolt sealing stake plug supporting capacity at the side-wall hole of steel pipe pile.
In above-mentioned pile pulling device, can be connected with connecting bolt between baffle plate with cover plate.
3rd object of the present invention is to provide the second hole to press counter-force steel pipe pile pile extracting method, and this pile extracting method can measure the Ultimate Up-lift Bearing Capacity of steel pipe pile, and more traditional uplift pile bearingtest method, experimentation cost is significantly reduced.
This second hole pressure counter-force steel pipe pile pile extracting method comprises the following steps:
A) locate steel pipe pile to be pulled out, and complete the installation of the sealing stake plug on steel pipe pile;
B) utilize the soil body in the sidewall of steel pipe pile, sealing stake plug, steel pipe pile, in steel pipe pile, form fluid storage chamber;
C) to one or both combinations in injecting gas, liquid in fluid storage chamber;
D) by continuing injecting gas or liquid in fluid storage chamber, the pressure of fluid storage intracavity gas or liquid is increased;
E) pore water pressure of the soil body in steel pipe pile or pore air pressure is made to increase;
F) utilize the gas in injection fluid storage chamber or liquid, the pore water pressure of the soil body in steel pipe pile or pore air pressure are passed to the sealing stake plug be positioned on steel pipe pile;
G) utilize and act on sealing stake gas beyond the Great Wall or fluid pressure carries out pile pulling as pile pulling power or as a part for pile pulling power, measure the pressure of gas in fluid storage chamber or liquid simultaneously, and measure the uplift displacement amount of steel pipe pile;
H) step g is repeated), until steel pipe pile reaches pull out destruction;
I) interpretation of records step g) the middle data recorded, according to pressure conversion pile pulling power;
J) according to the relation of pile pulling power and steel pipe pile uplift displacement amount, vertical ultimate uplift resistance of single pile is calculated;
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned the second hole, at above-mentioned steps j) in, in conjunction with uplift pile limiting equilibrium equation, the radial deformation of steel pipe pile in pile pulling process can be calculated according to the gas in pile pulling process or liquid pressure, and single pile Ultimate Up-lift Bearing Capacity revised.
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned the second hole, at above-mentioned steps j) in, steel pipe pile inside sliding block can be deducted according to total pile pulling power and calculate vertical ultimate uplift resistance of single pile.
In the pressure counter-force steel pipe pile pile extracting method of above-mentioned the second hole, at above-mentioned steps j) in, when calculating soil body frictional resistance inside steel pipe pile, the impact of increase on side friction of soil body pore water pressure or pore air pressure in steel pipe pile can be ignored.
4th object of the present invention is the pile pulling device providing two kinds of hole pressure counter-force steel pipe pile pile extracting methods used, and this pile pulling device can implement the second hole pressure counter-force steel pipe pile pile extracting method smoothly, and can measure vertical ultimate uplift resistance of single pile, and cost is low, and speed is fast.
This pile pulling device comprises sealing stake plug, steel pipe pile, the soil body in steel pipe pile, fluid storage chamber, fluid-transporting tubing, fluid injector, pressure measuring set, displacement at pile top measuring instrument eight part, wherein sealing stake plug is firmly to be connected with the sidewall of steel pipe pile and can the structure of shutoff steel pipe pile internal cavity, steel pipe pile is be arranged in the component of Rock And Soil with hollow tubular structure, fluid storage chamber is by sealing stake plug, the sidewall of steel pipe pile, the space that in steel pipe pile, the soil body encloses, fluid-transporting tubing is tubular structure gas or liquid being injected fluid storage chamber, fluid injector is the utensil by being injected fluid storage chamber after pressurized with fluid by fluid-transporting tubing, displacement at pile top measuring instrument is the instrument measuring steel pipe pile displacement at pile top change in pile pulling process, pressure measuring set is the instrument measuring fluid storage cavity fluid pressure.
Hole of the present invention pressure counter-force steel pipe pile pile extracting method and pile pulling device thereof, the hole pressure effect counter-force that can give full play to the soil body in steel pipe pile provides pile pulling counter-force, and pile pulling device is little, and cost is low, and can solve pile pulling band soil to a difficult problem for surrounding enviroment impact.
Accompanying drawing explanation
Fig. 1 is the pile pulling device structure organigram that first embodiment of the present invention and second embodiment hole used presses counter-force steel pipe pile pile extracting method used;
Fig. 2 is that counter-force steel pipe pile pile extracting method steel pipe pile cross sectional representation used is pressed in first embodiment of the present invention and second embodiment hole used;
Fig. 3 is that first embodiment of the present invention and second embodiment one used seals stake plug structure organigram;
Detailed description of the invention
As an embodiment as shown in Figures 1 and 2 of the present invention, main purpose is operating principle and the implementation method of introducing the first hole pressure counter-force steel pipe pile pile extracting method and pile pulling device used thereof.First, composition graphs 1 and Fig. 2 introduce hole of the present invention and press the structure of counter-force pile pulling device to construct and operating principle.This pile pulling device is using the important component part one of of steel pipe pile (1) as pile pulling device.Insert at steel pipe pile (1) in the process of the soil body, have the part soil body and enter in steel pipe pile, form the soil body (2) in steel pipe pile as shown in Figure 1, as before pile pulling, in steel pipe pile, the soil body (2) is less, first can backfill and supplement enough, then row pile pulling.In steel pipe pile, the soil body (2) also can be flowable mud.Sealing stake plug (3) can be set at the top of steel pipe pile (1), the steel plate that sealing stake plug (3) can be welding or be bolted in steel pipe pile (1) top, can also weld stiffener to improve the supporting capacity of sealing stake plug (3) on steel plate.Sealing stake plug (3) can also make like this: first within one week, firmly connect the steel plate of (as welding) one fixed width in steel pipe pile (1) inner side as baffle plate (4), the cover plate (5) being slightly less than steel pipe pile (1) cross section is positioned over baffle plate (4) below or top, make cover plate (5) and baffle plate (4) compact siro spinning technology, cushion (6) also can be installed between cover plate (5) and baffle plate (4) to improve the sealability of cover plate (5) and baffle plate (4) seam crossing, rubber pad can be adopted, the materials such as plastic mattress are as cushion (6), by baffle plate (4), cushion (6) seals stake plug (3) with cover plate (5) common composition, in order to improve the bonding strength of baffle plate (4) and cover plate (5), connecting bolt (7) can be set between baffle plate (4) cover plate (5), by connecting bolt (7), baffle plate (4) is firmly connected with cover plate (5), after pile pulling completes, by connecting bolt (7), cover plate (5) is separated with baffle plate (4).Cushion (6) wherein and cover plate (5), connecting bolt (7) can be reused.By boring a hole on the sidewall of steel pipe pile (1), the reinforcement bolt (8) passing through perforation can also be set in sealing stake plug (3) top or improve the bonding strength between sealing stake plug (3) and steel pipe pile (1) at steel pipe pile sidewall weld stiffener.Jointly enclosed the space formed be fluid storage chamber (9) by the soil body (2), sealing stake plug (3) in steel pipe pile (1), steel pipe pile.On the sidewall sealing stake plug (3) or steel pipe pile (1), perforate can be installed by fluid-transporting tubing (12), fluid-transporting tubing (12) can be the ventilating pipe be connected with air compressor, also can be the water pipe or oil pipe that are connected with water pump or oil pump, fluid-transporting tubing (12) needs and certain bears compressive stress ability, and ordinary circumstance is issued to the bearing capacity of 0.5 ~ 10MPa.Fluid injector (11) is the utensil by being injected fluid storage chamber (9) after pressurized with fluid by fluid-transporting tubing (12).Fluid injector (11) can be the one or more combination in air compressor, water pump, oil pump, when pile pulling power is larger, high-pressure hydraulic pump or high-pressure oil pump can be adopted as fluid injector (11).The present embodiment with lower part, composition graphs 1 and Fig. 2, introduce hole pressure counter-force steel pipe pile pile extracting method and the operating principle of above-mentioned pile pulling device.This hole pressure counter-force steel pipe pile pile extracting method can complete according to following steps: the first step, locate steel pipe pile to be pulled out, find steel pipe pile (1) to be pulled out, check the soil body filling situation of steel pipe pile (1), if the soil body is less, the soil body can be backfilled in right amount, check the situation of steel pipe pile (1) upper sealing stake plug (3), if do not seal stake plug (3) need reinstall, then according to the method for the forward part of the present embodiment, sealing stake plug (3) can be installed.If before this, when steel pipe pile (1) inserts construction, part completes the installation of sealing stake plug (3), then carry out the installation sealing stake plug (3) remainder.If before this, sealing stake plug (3) has been constructed, then can directly utilize.Complete the first step, enter second step.In the second step, utilize the soil body (2) in the sidewall of steel pipe pile (1), sealing stake plug (3), steel pipe pile, in steel pipe pile (1), form fluid storage chamber (9).At the sidewall of steel pipe pile (1) or sealing stake plug (3) upper perforate, fluid-transporting tubing (12) can be installed.Complete second step, enter the 3rd step.In the third step, by fluid-transporting tubing (12) to one or both combinations in fluid storage chamber (9) interior injecting gas, liquid, gas wherein can be the air injected by air compressor, also can be the water injected by water pump, can also be the mud etc. injected by slush pump, can also be the oils fluid injected by oil pump.Complete the 3rd step, enter the 4th step.In this step, by continuing injecting gas or liquid in fluid storage chamber (9), the pressure of fluid storage chamber (9) interior gas or liquid is increased.In this step, the gas injected in fluid storage chamber (9) or after liquid is full of, along with the increase of gas or liquid injection rate, fluid storage chamber (9) interior gas or liquid pressure will increase fast.Complete the 4th step, enter the 5th step.In this step, along with the injection of fluid storage chamber (9) interior gas or liquid, in steel pipe pile, the pore water pressure of the soil body (2) or pore air pressure will increase, because the time is relatively short, in addition the lasting injection of gas or liquid, the pore water pressure that in steel pipe pile, the soil body (2) increases or pore air pressure can gather.Complete the 5th step, enter the 6th step.In this step, liquid in fluid storage chamber (9) or gas are filled, then can utilize and inject gas in fluid storage chamber (9) or liquid as power transmission medium, (2) pore water pressure of the soil body in steel pipe pile or pore air pressure are passed to the sealing stake plug (3) being positioned at steel pipe pile (1) top.Complete the 6th step, enter the 7th step.In this step, because sealing stake plug (3) has certain area, be with the product acting on the pressure sealed on stake plug (3) power acting on and seal on stake plug (3).The direction of extracting of the direction of this power and steel pipe pile (1) is same direction, therefore can utilize and act on gas in sealing stake plug (3) or fluid pressure as pile pulling power or carry out steel pipe pile (1) as a part for pile pulling power and extract construction.Steel pipe pile (1) diameter is larger, and hole pressure counter-force is larger.In this step, at steel pipe pile (1) top, vibrating hammer (14) can be installed, reduce pile extraction resistance by the vibration of vibrating hammer (14).When installing vibrating hammer (14), adopt gas pressurized comparatively suitable.Because the compressibility of gas is better, the energy that vibrating hammer (14) vibrates can in higher efficiency for pile pulling.In this step, also can be applied with on steel pipe pile (1) and pull out active force assistance pile pulling construction, as laid crane (13), part pile pulling power can be provided in pile pulling process on the one hand, extract the stability of rear maintenance steel pipe pile (1) at steel pipe pile (1) on the other hand and steel pipe pile (1) properly can be placed or outward transport in time.In this step, can, while pile pulling, utilize steel pipe pile (1) peripheral ground to provide counter-force to assist pile pulling construction, reduce steel pipe pile (1) outside pile pulling band soil simultaneously.In the present invention, the counter-force that in employing steel pipe pile, the soil body (2) pore water pressure or pore air pressure produce as the great advantage of pile pulling power is, in pile pulling process, in steel pipe pile, the soil body (2) does not increase substantially with the frictional force of steel pipe pile (1) sidewall, although the compressive stress of the sidewall of steel pipe pile (1) increases, but the mainly fluid pressure such as water pressure or atmospheric pressure, shear strength because of fluid is zero, therefore the fluid pressure gathered can not increase the frictional resistance of the soil body in steel pipe pile (2) and steel pipe pile (1) sidewall.In addition, be soil strength weak link at the sidewall of steel pipe pile (1) and soil body contact surface, after fluid storage chamber (9) internal gas pressure or fluid pressure acquire a certain degree, have portion gas or liquid to overflow along the sidewall of steel pipe pile (1), in this case, moisture film or air cushion layer will be there is between the sidewall of the soil body and steel pipe pile (1), the effect of sliding agent can be reached, fluid compressive stress balancing pile week soil pressure can be formed simultaneously, steel pipe pile (1) is significantly reduced with the frictional force of the soil body, reduce pile pulling difficulty, and significantly can reduce the impact of steel pipe pile pile pulling band soil on surrounding enviroment.On the other hand, due in pile pulling process, in steel pipe pile (1), there is fluid pressure, there is radial dilatation in steel pipe pile (1) in pile pulling process, and the soil body in steel pipe pile (2) is reduced the frictional resistance of steel pipe pile (1).Steel pipe pile (1) described is in the present embodiment the structure having closed cross-section and can form fluid storage chamber (9), comprise in steel pipe pile, steel pipe pile diaphragm wall the structure comprising steel pipe pile and connect, and other are in the upper structure of installing Accessory Members of steel pipe pile (1).
As second embodiment of the present invention, main purpose is composition graphs 1 ~ Fig. 3, introduces operating principle and the implementation method of the second hole pressure counter-force steel pipe pile pile extracting method and pile pulling device used thereof.The present embodiment is very similar to first embodiment, and difference is to add content that to measure the fluid pressure (i.e. gas or liquid pressure) in fluid storage chamber (9) and steel pipe pile (1) displacement at pile top in pile pulling process and utilizes these data to calculate the method for vertical ultimate uplift resistance of single pile.According to the feature of fluid pressure, by measuring the fluid pressure in fluid-transporting tubing (12) inner fluid pressure reckoning fluid storage chamber (9), the pressure in pressure measuring set (15) measuring and calculating fluid storage chamber (9) can be installed on fluid-transporting tubing (12).Also the fluid pressure in fluid storage chamber can directly be measured.The displacement at pile top of steel pipe pile (1) can use the displacement at pile top measuring instruments (16) such as dial gage, displacement transducer or level gauge to measure.Uplift bearing capacity test can be carried out according to the code requirement determination loading classification of existing relevant pile foundation and time, then press current specifications method, according to the pile pulling power in pile pulling process, displacement at pile top and the dependency relation of time, determine limit pile pulling power.According to the ratio of the interior outer frictional resistance of steel pipe pile (1) in this method pile pulling process, the native frictional resistance in deduction steel pipe pile (1) inner side, calculates steel pipe pile (1) outer frictional resistance, is vertical ultimate uplift resistance of single pile.The factors such as uplift pile limiting equilibrium equation computational analysis stake is long, stake footpath, wall thickness can also be utilized the impact of vertical ultimate uplift resistance of single pile, and revised.
This patent includes but not limited to other construction methods of the alternative use of professional person in this area.
Claims (8)
1. a hole pressure counter-force steel pipe pile pile pulling device, it is characterized in that comprising sealing stake plug (3), steel pipe pile (1), the soil body (2) in steel pipe pile, fluid storage chamber (9), fluid-transporting tubing (12), fluid injector (11) six part, wherein sealing stake plug (3) is firmly to be connected with the sidewall of steel pipe pile (1) and can the structure of shutoff steel pipe pile (1) internal cavity, steel pipe pile (1) is for being arranged in the component of Rock And Soil with hollow tubular structure, fluid storage chamber (9) is by sealing stake plug (3), the sidewall of steel pipe pile (1), the space that in steel pipe pile, the soil body (2) encloses, fluid-transporting tubing (12) is tubular structure gas or liquid being injected fluid storage chamber (9), fluid injector (11) is the utensil by being injected fluid storage chamber (9) after pressurized with fluid by fluid-transporting tubing (12).
2. pile pulling device according to claim 1, is characterized in that above-mentioned fluid injector (11) is the one or more combination in air compressor, water pump, oil pump.
3. pile pulling device according to claim 1, it is characterized in that increasing to provide the plant equipment of uplift force to assist pile pulling.
4. pile pulling device according to claim 2, is characterized in that installing on steel pipe pile reducing pile extraction resistance vibrating hammer (14).
5. pile pulling device according to claim 1, is characterized in that above-mentioned sealing stake plug (3) is made up of baffle plate (4), cover plate (5), cushion (6) three part.
6. pile pulling device according to claim 1, is characterized in that installing for improving the reinforcement bolt (8) sealing stake plug (3) supporting capacity at the side-wall hole of steel pipe pile (1).
7. pile pulling device according to claim 1, is characterized in that being connected with connecting bolt (7) between baffle plate (4) with cover plate (5).
8. a hole pressure counter-force steel pipe pile pile pulling device, it is characterized in that comprising sealing stake plug (3), steel pipe pile (1), the soil body (2) in steel pipe pile, fluid storage chamber (9), fluid-transporting tubing (12), fluid injector (11), pressure measuring set (15), displacement at pile top measuring instrument (16) eight part, wherein sealing stake plug (3) is firmly to be connected with the sidewall of steel pipe pile (1) and can the structure of shutoff steel pipe pile (1) internal cavity, steel pipe pile (1) is for being arranged in the component of Rock And Soil with hollow tubular structure, fluid storage chamber (9) is by sealing stake plug (3), the sidewall of steel pipe pile (1), the space that in steel pipe pile, the soil body (2) encloses, fluid-transporting tubing (12) is tubular structure gas or liquid being injected fluid storage chamber (9), fluid injector (11) is the utensil by being injected fluid storage chamber (9) after pressurized with fluid by fluid-transporting tubing (12), displacement at pile top measuring instrument (16) is the instrument measuring steel pipe pile (1) displacement at pile top change in pile pulling process, pressure measuring set (15) is the instrument measuring fluid storage chamber (9) inner fluid pressure.
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| CN201520090818.7U CN204475337U (en) | 2015-02-09 | 2015-02-09 | A kind of hole pressure counter-force steel pipe pile pile pulling device |
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| CN201520090818.7U CN204475337U (en) | 2015-02-09 | 2015-02-09 | A kind of hole pressure counter-force steel pipe pile pile pulling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178319A (en) * | 2015-02-09 | 2015-12-23 | 张继红 | Pore pressure counterforce steel tube pile pulling method and device and soil removing device |
| WO2018091395A1 (en) | 2016-11-16 | 2018-05-24 | Innogy Se | Method for dismantling offshore foundation structures |
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2015
- 2015-02-09 CN CN201520090818.7U patent/CN204475337U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178319A (en) * | 2015-02-09 | 2015-12-23 | 张继红 | Pore pressure counterforce steel tube pile pulling method and device and soil removing device |
| WO2018091395A1 (en) | 2016-11-16 | 2018-05-24 | Innogy Se | Method for dismantling offshore foundation structures |
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