CN1205393C - Method and device for forming sand pile - Google Patents
Method and device for forming sand pile Download PDFInfo
- Publication number
- CN1205393C CN1205393C CNB008102139A CN00810213A CN1205393C CN 1205393 C CN1205393 C CN 1205393C CN B008102139 A CNB008102139 A CN B008102139A CN 00810213 A CN00810213 A CN 00810213A CN 1205393 C CN1205393 C CN 1205393C
- Authority
- CN
- China
- Prior art keywords
- sand
- end cover
- top end
- sleeve pipe
- sand pile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A tip cover (12) installed at the tip of a casing pipe (11), comprising a generally truncated cone-shaped tip cover case (13), a ball valve (16) stored vertically movably in the tip cover case (13), and a valve seat part (14) in contact with the ball valve (16) to bring the inside of the casing pipe (11) into a closed condition at the tip thereof, wherein a soil pressure sensor (S1) measuring a surrounding soil pressure is installed on the outer side of the tip cover case (13), a pressure sensor (S2) measuring air pressure is installed on the inner side of the casing pipe (11), and an air feed port for feeding compressed air is provided inside the tip cover case.
Description
Technical field
The present invention relates to a kind of method of the sand pile that in soft formation, is formed for improveing the stratum and form the device of sand pile by this method.
Background technology
In the past,, the scheme that is disclosed in No. the 2791914th, Japan Patent is for example arranged as the method and apparatus that forms this sand pile.
The sand pile that is shown in this patent forms device as shown in Figure 15, has vibropiling hammer 46 at head, above sand pile forms with hollow section 41, sand input bucket 42 and compressed air supply pipe 43 are installed, in its underpart, with radial setting by the cylinder down 44 supplying with pressure (hydraulic) water and drive and by this down cylinder 44 hold concurrently to the multi-disc sand jam-packed that drives towards upper and lower and discharge leaf 45.Symbol 47 illustrates the pressure (hydraulic) water supply pipe that is used for supplying with to cylinder down 44 pressure (hydraulic) waters.
Utilize the sand pile formation method of this device as follows
At first, hollow section 41 is driven into prescribed depth, 42 drops into sand, simultaneously, be blown into compressed air from compressed air supply pipe 43 from struggling against by vibropiling hammer 46.At this moment, hollow section 41 interior air press the soil around being not flow into the interior degree of pipe, definitely can not be discharged to the outer such big air pressure of pipe for making the interior input sand of pipe.
Under this state, pressure (hydraulic) water is pressed into cylinder 44, with certain speed discharge leaf 45 is moved up and down repeatedly, thereby the part of the input sand in the hollow section 41 is stayed, basically by forcibly its below towards hollow section 41 being released, thus with its discharge with the contact resistance of discharging leaf 45.At this moment, hollow section 41 is also extracted specific length from the stratum.Like this, the sand of discharge is by discharging leaf 45 jam-packeds.
After like this sand being discharged in the soft stratum, remove the pressure in the pipe 41, again from 42 sand that drop into ormal weights that struggle against, extracting of the specific length that carry out sand discharge and jam-packed that the soil pressure corresponding with the displacement of hollow section 41 lower ends keep pressurization in the pipe of balance, formed by the start of cylinder 44, reaches hollow section 41, after, carry out this operation repeatedly and form sand pile.
The degree of above-mentioned pressurization is by the degree of depth corresponding soil pressure of calculating in advance with hollow section 41 lower ends, according to this soil pressure decision.
In addition, form device, for example be shown in Japanese special fair 8-1060 number that the applicant had before filed an application as sand pile.
This as shown in Figure 16, be provided with the top that is used for compressed air is imported to the sleeve pipe 11 of inner nozzle 21, installation can keep up or down having the top end cover shell 13 cylindraceous of the ball valve 16 of regulation proportion ', the opening portion setting of (being the lower end in Figure 16) is by the seat portion 14 of these ball valve 16 obturations on sleeve pipe 11 tops, when squeezing into sleeve pipe 11 on the stratum, this ball valve 16 prevents the top of the inaccessible intrusively sleeve pipe 11 of native sand, when discharging the sand of sand pile formation usefulness, sand and compressed-air actuated pressure make ball valve 16 portion 14 that lifts off a seat, and top end cover shell 13 ' between form sand and discharge and use the gap.
Above-mentioned existing sand pile shown in Figure 15 forms the tip side of device in hollow section inside can be provided with the double leaf of discharging of sand jam-packed up or down, simultaneously, must be provided for driving the cylinder down of this discharge leaf, their exist because the pressure when putting into the sand in the hollow section and hollow section being embedded and damaged danger, simultaneously, the obstruction in the time of may becoming the sand discharge.In addition, in this device, need make the pressure (hydraulic) water and the attendant equipments such as feedway and its control device of cylinder effect down, so it is big that equipment becomes, it is prepared and operation also more bothers.
In addition, in the formation method of the sand pile that uses this device, by in hollow section, dropping into the sand of ormal weight, simultaneously, be blown into the compressed air of authorized pressure, the discharge leaf is moved up and down, thereby with the sand jam-packed, hollow section is pulled out specific length, and such operation must be carried out repeatedly, the operating efficiency extreme difference.In addition, corresponding to pulling out of hollow section, the air in the control valve is pressed, keep balance with the pairing soil pressure of the displacement of its lower end, but this soil pressure obtains according to calculated value, so, according to the situation on the stratum of reality, may not be exactly that optimal air is pressed, existence can not be carried out the danger of desired operation.
In addition, device shown in Figure 16 is when squeezing into sleeve pipe, and its top is by the ball valve obturation, so seawater and argillaceous native sand can not invaded in inside, but opposite, when discharging sand, this ball valve becomes obstacle, has more time-consuming problem when discharging.
Summary of the invention
The present invention makes for the sand pile that solves above-mentioned prior art forms the problem points that method and apparatus has, it is a kind of in the different various soft formations of condition that its purpose is to provide, and forms the method for the sand pile with prescribed strength and diameter and be used for the device of this method really and with good efficiencies.
Sand pile formation method of the present invention is to squeeze into the sleeve of the top end cover with ball-valve type in soft formation, put into sand in the sleeve after, only will stay and take out sleeve pipe in the stratum by the sand pile that the sand that drops into form; Wherein,, the air of top end cover inside is pressed with soil pressure of measuring around it equally controls when when the stratum takes out sleeve, thus can be under the state that the cavity that is formed by sleeve pipe does not collapse with sandfilling in this cavity.
In addition, sand pile formation method is by being pressed into again of sleeve, enlarged in the time of the sand jam-packed that will discharge from the sleeve pipe with top end cover; Wherein, the pressure when control is pressed into sleeve pipe again according to the measured value of the soil pressure meter of being located at this cannula tip, thus form sand pile with desired intensity and diameter.
Sand pile of the present invention forms device and constitutes by being provided with the top end cover that is used for to inside imports the sleeve pipe of compressed-air actuated nozzle and is installed on this cannula tip; Wherein, thereby above-mentioned top end cover is expanded the top end cover shell that is truncated cone shape substantially open, can be contained in ball valve in this top end cover shell up or down, and made in the cannula tip by this ball valve contact and to constitute for the seat portion of air-tight state by the top, the soil pressure case of the pressure around the arranged outside of this top end cover shell is measured, the pressure sensor of the air pressure of measuring in the sleeve pipe is set in the inboard, and portion is provided for sending into compressed-air actuated air supply port within it.
In addition, be provided for measuring the soil pressure meter that sleeve pipe is pressed into pressure on the top end cover top of said apparatus.
Description of drawings
Fig. 1 is the main position longitudinal section that sand pile of the present invention forms the embodiment of device.Fig. 2 is the sectional view of the A-A line of Fig. 1, and Fig. 3 is the sectional view of the B-B line of Fig. 1, and Fig. 4 is the sectional view of the C-C line of Fig. 1.Fig. 5 illustrates the schematic section of an operation that sand pile of the present invention forms the user mode of device.Fig. 6 illustrates the schematic section of an operation that sand pile of the present invention forms the user mode of device.Fig. 7 illustrates the schematic section of an operation that sand pile of the present invention forms the user mode of device.Fig. 8 illustrates the schematic section of an operation that sand pile of the present invention forms the user mode of device.Fig. 9 is the cross-sectional illustration figure that sand pile formation method of the present invention is shown.Figure 10 illustrates the cross-sectional illustration figure of sand pile formation method of the present invention.Figure 11 is the schematic section that is illustrated in the state of the sand that drops into ormal weight in the columnar shell.Figure 12 is the key diagram that the stress of the shell internal face that acts on occasion shown in Figure 11 is shown.Figure 13 is the schematic section that the state in the shell that sand with ormal weight is encased in hollow truncated cone is shown.Figure 14 is the key diagram that the stress that acts on shell internal face shown in Figure 13 is shown.Figure 15 illustrates the schematic section that sand pile forms the prior art example of device.Figure 16 illustrates the schematic section that sand pile forms other prior art example of device.
The specific embodiment
Describe the present invention with reference to the accompanying drawings in detail.Wherein, the parts of function same as the prior art adopt same-sign.
Fig. 1 is the sectional view that sand pile of the present invention forms the head portion of device, and Fig. 2, Fig. 3, Fig. 4 are respectively the sectional view of its A-A line, B-B line, C-C line.This sand pile forms the top end cover 12 of device in the top of sleeve pipe 11 (being the lower end) mounting ball valve formula in Fig. 1, in the time will changing the soft formations such as clay matter layer that are piled up in seabed etc., be used for forming sand pile in this soft formation.
This seat portion 14 has the lower face 14c that goes up facial 14a, the 14b of inner peripheral surface portion, reaches taper, court has a down dip along with sidling from the past axle center of the inner peripheral surface of sleeve pipe 11 should to go up facial 14a, the 14b of this inner peripheral surface portion inner peripheral surface ground that all sides are parallel to pipe in the facial 14a on this towards below extend, this lower face 14c links to each other with this 14b of inner peripheral surface portion downside and moves closer to interior all sides of pipe.That is, this lower face 14c becomes the state that protrudes towards the top with circular-arc.This seat portion 14 by strengthening with radial its a plurality of rib 14d on every side that are arranged at, engages the interior week of being fixed in sleeve pipe 11 as shown in Figure 2 by this rib 14d.
At the chimeric reinforcement tube 20 of the lower end of top end cover shell 13 outer peripheral face.Interior side at this reinforcement tube 20 is provided with trapezoidal a pair of stiffener 18,18 and under plan view it is combined into crosswise substantially, from its intersection point supporting station portion 17 is set projectedly towards the top, simultaneously, bend to circular-arc valve receiving portion 19 in these supporting station portion 17 settings.
Here, sand pile of the present invention forms the outside of device at the top end cover shell 13 that is formed at hollow cardinal principle circular cone shape, the soil pressure case S1 of the soil pressure around being provided for measuring, simultaneously, with the inboard of this soil pressure case S1 top end cover shell 13 in opposite directions, be provided for measuring the pressure sensor S2 of its pressure inside.The soil pressure meter S3 that is pressed into pressure when in addition, the intersection point downside that (is the lower end in Fig. 1) on the top of top end cover 12 and is stiffener 18 is provided for measuring sleeve pipe 11 and squeezes into.
In addition, though not shown among the figure, in fact be provided with and be used for compressed air is sent to its inner air supply port at this top end cover shell 13.
Sand pile of the present invention forms device and has above-mentioned formation.
Below, the occasion that forms sand pile with the soft formation in the seabed is that the example explanation utilizes this sand pile to form the sand pile formation method of the present invention of device.
At first, as shown in Figure 5, when the top that makes sand pile form device entered into seawater, seawater was immersed in the top end cover shell 13 from its lower ending opening.At this moment, when seawater when immersing to a certain degree, its inner air is pressed and is uprised, so seawater can not be immersed in the sleeve pipe 11 of seat portion 14 upsides.
When from this state device further being descended, top end cover 12 arrives soft clay matter soil layer of sand 31 finally, and is pressed into wherein.When like this when clay matter soil layer of sand 31 is pressed into top end cover 12, invade clay matter soil sand from the lower ending opening of top end cover shell 13, proportion is lifted than the little ball valve 16 of the native sand of this clay matter, as shown in Figure 6, be crimped on the lower face of seat portion 14.Therefore, the lower end of sleeve pipe 11 is prevented that by obturation clay matter soil sand from invading in the sleeve pipe 11.
At this moment, when the be pressed into amount of top end cover 12 in clay matter soil layer of sand 31 increased, it is big that the buoyancy that ball valve 16 is subjected to also becomes.
Like this, top end cover 12 passes clay matter soil layer of sand 31, is pressed into the hard soil layer of sand 32 of clay matter soil layer of sand 31 downsides as shown in Figure 7, at this moment, ball valve 16 is crimped on seat portion 14 under bigger buoyancy function, so, under this state, sand S is put in the sleeve pipe 11.At this moment, the amount of the sand S of input is not for making the degree of ball valve 16 declines because of the deadweight of sand.
When not making ball valve 16 drop into sand S in sleeve pipe 11, its top further is pressed in the hard soil layer of sand 32 with descending.Like this, at the bigger buoyancy of ball valve 16 effect, so, becoming the state that in sleeve pipe 11, can drop into sand S, additional input makes the do not descend sand S of such degree of ball valve 16.Like this, when putting into sand S in the sleeve pipe 11, alternately carry out being pressed in hard soil layer of sand 32 repeatedly, as shown in Figure 8, will install all and be pressed into the stratum with prescribed strength 33 up to top end cover 12 arrival hard soil layers of sand 32 belows.
At this moment, form in the device at sand pile of the present invention, the measured value that compares soil pressure case S1 and pressure sensor S2, so that the soil pressure on every side that the pressure in the top end cover shell 13 changes with being pressed into along with it is corresponding, compressed air is sent in this top end cover shell 13 from not shown air supply port.
Like this, when top end cover 12 arrives the stratum 33 of regulation, will install all and extract towards the top.At this moment, form in the device at sand pile of the present invention, make the pressure in the top end cover shell 13 equally supply with compressed air substantially from air supply port (not shown) at top end cover shell 13 inner openings with soil pressure on every side, so, along with this is extracted, be formed at air in the cavity (with reference to the symbol 34 of Fig. 9) of top end cover shell 13 downsides and press and also keep to such an extent that equate with on every side soil pressure.Therefore, this cavity can not collapse.
In addition, extract with this and linkedly compressed air to be imported in the sleeve pipe 11, simultaneously,, like this, to putting into the sand S pressurization in the sleeve pipe 11, the ball valve 16 that is crimped on seat portion 14 is depressed towards the below from spray nozzle part 21 injection air jets.Therefore, the lower end of open sleeve pipe 11, the sand in the sleeve pipe 11,, is discharged in the cavity 34 below it as being illustrated by arrow among Fig. 9 by the gap between ball valve 16 and the top end cover shell 13 from seat portion 14.
At this moment, form in the device, because top end cover shell 13 forms the hollow truncated cone-shaped of lower end expansion, so the discharge of sand S can be carried out smoothly at sand pile of the present invention.Its reason is, when ball valve 16 descends, be formed at around it and the sand between the inner face of top end cover shell 13 to pass through the gap wideer than the occasion of columnar top end cover shell, and, between the inner face of sand S and top end cover shell 13, produce basically and rub.
The reason that this friction disappears is as follows
Promptly, in the occasion of the columnar top end cover shell of prior art, as shown in Figure 11, when portion inserts the sand S of height H degree within it, as shown in Figure 12, produce as shown in Figure 12 horizontal direction power P as the function representation at the internal friction angle of the weight of sand and sand.This P is the oblique δ of square neck up by the friction of sand and shell internal face.When the P relative wall is resolved into vertical direction and horizontal direction, become the power P that acts on wall respectively vertically
NFlatly act on the power P of wall
LAct on the power P of wall vertically
NFriction by sand and wall produces the P that is parallel to wall up
NFFrictional force.At this moment, general P
NF＞P
L, sand can not move towards the below, or moves the generation obstacle.
And in the occasion of the top end cover shell of hollow truncated cone shape, as shown in Figure 13, when portion inserts the sand S of height H degree within it, as shown in Figure 14, generation is as the horizontal direction power P of the function representation at the weight of sand and sand internal friction angle, this P is by the friction of sand and the shell internal face oblique δ of square neck up, and these are all identical.Yet, by making the relative vertical direction cant angle theta of wall, thereby make the power P of relative wall along the vertical direction effect
NCompare with columnar occasion and to reduce, on the contrary, act on the power P of wall abreast
LCompare change with columnar occasion big.Act on the power P of wall vertically
NThe along continuous straight runs that is produced by the friction of sand and wall acts on the frictional force P of wall
NFAlso diminish.This is because there is P in the difference according to the size of the tilt angle theta of wall
NF＜P
LThe angle of inclination, result, the frictional force of sand and wall are zero on apparent.
Like this, form device, the sand S that puts in the sleeve pipe 11 is discharged back-up sand S in the cavity 34 that is formed at its downside towards the below by top end cover 12 by extracting sand pile from hard soil layer of sand.When specific length is extracted sleeve pipe 11, once more this sleeve pipe 11 is pushed in the sand that is pressed onto discharge.At this moment, ball valve 16 is boosted by the sand that invades in the top end cover shell 13 as shown in Figure 10, is crimped on seat portion 14, the lower end of closed casing 11.Therefore, the interior sand in cavity that is formed at native layer of sand is pressurizeed by top end cover 12, as shown in Figure 10 enlarged.
At this moment, in sand pile formation method of the present invention, measure the pressure that is pressed into of sleeve pipe 11 by the soil pressure meter S3 that is installed on top end cover 12 tops, making this be pressed into pressure becomes with the corresponding authorized pressure of soil property ground and controls.Therefore, the sand that pushes by this being pressed into again of sleeve pipe 11 form have predetermined outside diameter, specific length, and the sand pile of regulation degree of consolidation.
Below, by carrying out same action repeatedly, as shown in Figure 10, the sand pile SP of formation predetermined outside diameter and degree of consolidation in hard soil layer of sand 32 and in the clay matter soil layer of sand 31.
As described above, in sand pile formation method of the present invention, can not make the cavity collapse ground portion's back-up sand within it that forms by sleeve pipe, form sand pile, in addition, but this sand pile of jam-packed also, form desired intensity and diameter, so, useful to the soft formation of easy collapses such as improvement stratum, seabed.
In addition, it is not only simple in structure that sand pile of the present invention forms device, and, can form sand pile really, and the discharge of sand can have been carried out smoothly also at this moment, so operating efficiency improves, engineering time and construction cost, labour cost etc. all can reduce.Owing to these reasons, exist to promote with the stratum improvement import to fail the area of carrying out may.
Claims (4)
1. sand pile formation method is squeezed into the sleeve of the top end cover with ball-valve type in soft formation, put into sand in the sleeve after, only will stay and take out sleeve pipe in the stratum by the sand pile that the sand that drops into form,
It is characterized in that: when when the stratum takes out sleeve, the air of top end cover inside is pressed with soil pressure of measuring around it equally controls, thus can be under the state that the cavity that is formed by sleeve pipe does not collapse with sandfilling in this cavity.
2. sand pile formation method, by being pressed into again of sleeve, enlarged in the time of the sand jam-packed that will discharge from sleeve pipe with top end cover,
It is characterized in that: the pressure when control is pressed into sleeve pipe again according to the measured value of the soil pressure meter of being located at this cannula tip, thus form sand pile with desired intensity and diameter.
3. a sand pile forms device, constitute by being provided with the top end cover that is used for to inside imports the sleeve pipe of compressed-air actuated nozzle and is installed on this cannula tip,
It is characterized in that: thus above-mentioned top end cover is expanded the top end cover shell that is truncated cone shape open, can be contained in ball valve in this top end cover shell up or down, and made in the cannula tip by this ball valve contact and to constitute for the seat portion of air-tight state by the top, the soil pressure case of the soil pressure around the arranged outside of above-mentioned top end cover shell is measured, the pressure sensor of the air pressure of measuring in the top end cover shell is set in the inboard, and portion is provided for sending into compressed-air actuated air supply port within it.
4. sand pile according to claim 3 forms device, it is characterized in that: be provided for measuring the soil pressure meter that sleeve pipe is pressed into pressure on the top of top end cover.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13955900 | 2000-05-12 | ||
| JP2000139559A JP3584201B2 (en) | 2000-05-12 | 2000-05-12 | Sand pile forming equipment |
| JP139559/2000 | 2000-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1360655A CN1360655A (en) | 2002-07-24 |
| CN1205393C true CN1205393C (en) | 2005-06-08 |
Family
ID=18646984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008102139A Expired - Fee Related CN1205393C (en) | 2000-05-12 | 2000-06-28 | Method and device for forming sand pile |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP3584201B2 (en) |
| KR (1) | KR20020033727A (en) |
| CN (1) | CN1205393C (en) |
| TW (1) | TW479096B (en) |
| WO (1) | WO2001086076A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031780A (en) * | 2010-12-13 | 2011-04-27 | 广东省第二建筑工程公司 | Water flushing construction method of static tubular pile of sand pile tip |
| JP4854101B1 (en) * | 2011-09-22 | 2012-01-18 | 井森工業株式会社 | Casing pipe end lid |
| KR101472783B1 (en) * | 2014-03-27 | 2014-12-15 | 성렬수 | Injection tip equipment for excavating ground |
| KR102145372B1 (en) * | 2019-05-20 | 2020-08-18 | 주식회사 신아건설산업 | Casing dead-end apparatus taking the V-type symmetry circle cone and method constructing compaction pile thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081060B2 (en) * | 1993-07-13 | 1996-01-10 | 井森工業株式会社 | Tip cover of casing pipe for sand pile formation |
| JPH09279565A (en) * | 1996-04-15 | 1997-10-28 | Nippon Kaikou Kk | Ground improvement construction method |
| JP3893572B2 (en) * | 1997-03-12 | 2007-03-14 | 国土総合建設株式会社 | Sand pile construction method |
-
2000
- 2000-05-12 JP JP2000139559A patent/JP3584201B2/en not_active Expired - Lifetime
- 2000-06-28 WO PCT/JP2000/004287 patent/WO2001086076A1/en not_active Application Discontinuation
- 2000-06-28 KR KR1020027000400A patent/KR20020033727A/en not_active Application Discontinuation
- 2000-06-28 CN CNB008102139A patent/CN1205393C/en not_active Expired - Fee Related
- 2000-06-30 TW TW089113034A patent/TW479096B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001086076A1 (en) | 2001-11-15 |
| KR20020033727A (en) | 2002-05-07 |
| JP2001323448A (en) | 2001-11-22 |
| TW479096B (en) | 2002-03-11 |
| JP3584201B2 (en) | 2004-11-04 |
| CN1360655A (en) | 2002-07-24 |
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