CN1598168A - Execution method of pile - Google Patents
Execution method of pile Download PDFInfo
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- CN1598168A CN1598168A CN 200410068398 CN200410068398A CN1598168A CN 1598168 A CN1598168 A CN 1598168A CN 200410068398 CN200410068398 CN 200410068398 CN 200410068398 A CN200410068398 A CN 200410068398A CN 1598168 A CN1598168 A CN 1598168A
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Abstract
Provided is an execution method of a pile capable of increasing bearing force of the pile by making use of an expansion property by water absorption of a steel making slag occurring in a steel making process. The pile 1 is erected into an excavated hole H, at the same time, the circumference section of the pile 1 and the inside section are filled with expansible slags 2, and the slags 2 are expanded to increase bearing force of the pile 1.
Description
The invention technical field
The invention relates to the job practices of stake, the expansion property by water absorption of particularly utilizing converter slag and/or electric-furnace slag (being called " steel-making slag " in this manual) to have, the pile construction method of the supporting force of raising stake.
Background technology
In the past,, following practical approach was arranged, that is, 1. fill sand, rubble and soil-cement etc., and then as required, apply mechanical oscillation and compressive force, made the method for stake ground compacting on every side at end and peripheral part of stake as the method for guaranteeing pile bearing power; 2. in stake, form appendicular methods such as joint, lath, the wing, chock, etc.
Yet, guarantee that problem that the method with ground compacting around the stake in the method for pile bearing power, 1. exists is that to build the excavated hole and the gap between the stake of stake generally very narrow, can not form the cavity, be difficult to fill equably packing material, and mechanical oscillation and compressive force can not be delivered to the deep layer position easily effectively.In addition, when packing material uses the good spheroidizing material of fillibility, be easy to form the problem of aqueousization during earthquake.
2. stake is gone up and is formed appendicular method, and the problem of existence is that the appurtenance below is difficult to compacting.
Yet the steel-making slag has the character that expands in the suction back, therefore, and the current purposes that has limited as the civil construction material.
Specifically, the example that utilizes with this converter slag, improvement job practices as soft foundation, set the column converter slag to hover ground basic unit, as sand drain, utilize the job practices (opening flat 6-116937 communique) of all water imbibitions of slag and water permeability, in addition with reference to the spy, only the example of Cun Zaiing is curing characteristics and a water permeability of utilizing the steel-making slag, as roadbed material.
Yet when the slag of will making steel was used as sand drain and roadbed material, the steel-making dilatancy that slag had had become problem on the contrary, when using the steel-making slag, by preserve 100 hours enforcement burin-in process in about 100 ℃ steam, to eliminate the dilatancy that the steel-making slag has.
Like this, in the application of steel-making slag, consume this point with regard to energy, the expense that just need cost a lot of money also may not be utilized effectively, particularly current present situation, and the steel-making slag purposes that burin-in process is not carried out in exploitation becomes problem.
Goal of the invention
The objective of the invention is provides a kind of job practices in view of problem of in above-mentioned existing pile construction method pile bearing power being found and the problem that relevant steel-making slag effectively utilizes, and promptly utilizes the steel-making slag to have the character of imbibition, to improve the supporting force of stake.
Technical scheme
In order to achieve the above object, the invention of technical scheme 1 record is characterized in that stake is built in the excavated hole, simultaneously around stake and/or inner the filling have expansile steel-making slag, improve the supporting force of stake by the expansion of described slag.
Slag is filled in this situation and the bottom that is not precluded within stake.
At this, so-called " having expansile steel-making slag " refers to the steel-making slag that dilatancy is disappeared by carrying out burin-in process.
According to the invention of technical scheme 1 record, be built in stake in the excavated hole around and/or inner slag of filling expand by suction.
In view of the above, even it is very narrow with the gap of stake to build the excavated hole of stake, owing to be filled in the stake expansion of slag on every side, also can fill packing material equably, and can not form the cavity, and also compressive force can be communicated to further portion simultaneously, make stake ground on every side form compactingization easily and really, improve the supporting force of ground, thereby also improved the supporting force of stake.
Because the inner slag of filling of stake expands, the expanded radially power of stake upwards applies extruding force in the footpath of stake, can increase the rigidity of stake.On the other hand, the axial expansion power of stake can apply and upload the corresponding stress of loading (prestressing force) in stake, can improve the supporting force of stake in view of the above.
And then the steel-making slag has also obtained effective utilization.
The invention of technical scheme 2 records is characterized in that according to the ground character of building stake, builds the purpose of stake etc., adjusts the expansion rate of the slag of filling.
According to the invention of technical scheme 2 records, according to the ground character of building stake, for example, and argillic horizon, layer of sand, the purposes of construction stake etc. utilize the slag of having adjusted expansion rate to expand, and can make stake ground on every side strong to needed intensity.
The slag that is filled in a upper position is made lid with (at this moment, the slag expansion rate that preferably will be filled in a upper position is turned down), can make lower position ground on every side obtain further effectively strong.
The invention of technical scheme 3 records is characterized in that vertically forming rib with a determining deviation in the periphery of stake along it, utilizes this rib control to be filled in the slag expansion position and the method for a peripheral part.
Invention according to technical scheme 3 records, by the slag expansion position and the direction that are filled in a peripheral part in the periphery of stake along its rib control that vertically forms with a determining deviation, the stake of construction is had as the effect that saves stake, can further improve the supporting force of stake like this.
The invention that technical scheme 4 is put down in writing is characterized in that building the excavated hole of stake, forms major diameter at upper position, in the shape of lower position formation minor diameter, makes the state of the slag formation different-diameter section of filling.
According to the invention of technical scheme 4 records, can improve the ground supporting force that forms major diameter excavated hole position, thereby also can improve the supporting force (horizontal endurance) of stake.
The invention of technical scheme 5 records is characterized in that a plurality of excavated hole of will build stake interconnect at the upper position place, are filled to slag planar.
Invention according to technical scheme 5 records can improve the supporting force of the ground at interconnective excavated hole position, upper position place, thereby can further improve the supporting force (horizontal endurance) of stake.
When ground was the grittiness ground, even slag solidifies, when earthquake, interstitial water can both unhinderedly give off.
The invention of technical scheme 6 records, it is characterized in that above-mentioned to have expansile steel-making slag be except independent use it, can also be with the steel-making slag as main component with following material mixes use more than a kind or 2 kinds utilizes the expansile material with expansile steel-making slag, these materials are the steel-making slag after the burin-in process, blast furnace slag, ferroalloy slag, Water Quenching Slag, copper smelting slag, red soil, flyash, rubbish burns the refining slag, rubbish burns the refining ash, sludge silt, glass dust minces, waste gypsum, trade wastes such as concrete waste material, gypsum, quicklime, cement, rubble, sand, structure materials such as clay, artificial material, mineral etc.
According to the invention of technical scheme 6 records, owing to do not need the steel-making slag is carried out burin-in process, utilize the steel-making slag so can hang down expense ground, the steel-making slag is more effectively utilized.
Description of drawings
Fig. 1 be the 1st embodiment of pile construction method of the present invention construct the example longitudinal sectional drawing.
Fig. 2 (A) is that key diagram, (B) of the steel-making slag expansion characteristics before the burin-in process is the key diagram that has cooperated the uniaxial compressive strength variation of steel-making slag and water granulated slag material.
Fig. 3 is the longitudinal sectional drawing of the construction example of expression pile construction method the 2nd embodiment of the present invention, the occasion of Fig. 3 (A) expression argillic horizon and layer of sand, and Fig. 3 (B) expression is according to the occasion of the expansion rate of change in depth slag.
Fig. 4 is the longitudinal sectional drawing of the construction example of expression pile construction method the 3rd embodiment of the present invention.
Fig. 5 is vertical profile of the construction example of expression pile construction method the 4th embodiment of the present invention.
Fig. 6 is vertical profile of the construction example of expression pile construction method the 5th embodiment of the present invention.
Fig. 7 is when stake is applied loading, the relation curve of loading and deflection.
Fig. 8 is when stake is applied loading, the relation curve of loading and deflection.
The working of an invention form
The example of pile construction method of the present invention below is described with reference to the accompanying drawings.
The 1st embodiment of pile construction method of the present invention shown in Fig. 1.
This embodiment, on ground, excavate excavated hole H, match with the external diameter and the degree of depth of predefined steel pipe pile 1, insert the steel pipe pile 1 of prescribed depth in this excavated hole H, outer peripheral portion and inner the filling with the density of stipulating to this steel pipe pile 1 has expansile slag 2 simultaneously.
The setting of this situation is to make the internal diameter of excavated hole H be a bit larger tham the external diameter of steel pipe pile 1, so that can fill the slag 2 of ormal weight to the outer peripheral portion of steel pipe pile 1.
In the present embodiment, steel pipe pile 1 is a light face shape, as required, also can use the steel pipe pile that has rib etc. on inner and outer circumferential surfaces, so that be suitable for the building of ground or construction.
As required, can fill slag in the bottom of steel pipe pile 1.
For the peripheral part of steel pipe pile 1 and inner fill have an expansile slag 2, can use the steel-making slag separately, the steel-making slag before the burin-in process preferably, perhaps, to make steel slag as principal component, with mix use more than a kind or 2 kinds in the following material, that is, these materials are: the steel-making slag after the burin-in process, blast furnace slag, ferroalloy slag, Water Quenching Slag, copper smelting slag, red soil (aluminum smelting technology slag), flyash, rubbish burns the refining slag, rubbish burns the refining ash, sludge silt, glass dust minces, waste gypsum, trade wastes such as concrete waste material, gypsum, quicklime, cement, rubble, sand, structure materials such as clay, artificial material, mineral etc. can utilize the expansile material of steel-making slag.
Herein, the steel-making slag before the burin-in process, because expansion property by water absorption is remarkable especially, optimum pile construction method of the present invention uses.
Illustrated among Fig. 2 (A) and used the preceding steel-making slag of the following burin-in process of particle diameter 5mm, carried out the result of expansion test according to JISA5015.
From Fig. 2 (A) as can be known, the steel-making slag expansion characteristics (expansion rate) before the burin-in process, different with environment, temperature, cooperation, chemical compound etc.
Water granulated slag has countless bubbles, owing to form the corner angle shape, so have light weight, big shearing resistance, water permeability, the hydraulicity, optimum pile construction method of the present invention is used.
Equally, the slag 2 that will have this specific character is filled in the outer peripheral portion and the inside of steel pipe pile 1, when being the grittiness ground, solidifies until slag 2, still interstitial water can be given off smoothly during earthquake, prevents aqueousization of ground of possible trouble.Utilize the hydraulicity to improve the supporting force of ground, therefore, can improve the supporting force of stake.
Illustrated among Fig. 2 (B) and will make steel the mixture of slag and water granulated slag and be encapsulated in the vinyl bag, in case moisture (5～8%) dissipation, maintenance is taken out after 28 days and 90 days, measures the result of uniaxial compressive strength.
From Fig. 2 (B) as can be known, increase the fit rate of steel-making slag more, increase more, obtain to improve the effect of supporting force owing to solidify the phenomenon uniaxial compressive strength.
Outer peripheral portion and inner slag 2 of filling at steel pipe pile 1 except using slag of the same race, as required, can use the different slag of expansion rate, and for example, at the slag that the outer peripheral portion of steel pipe pile 1 is filled, its expansion rate is bigger than the slag of filling in the inside.
The slag 2 that will have this specific character is filled in the outer peripheral portion and the inside of steel pipe pile 1, the slag 2 of outer peripheral portion that is filled in steel pipe pile 1 is owing to the contained moisture (also can add water as required) of ground around having absorbed expands, even the excavated hole H of construction stake and the gap of steel pipe pile 1 are very narrow, also can fill packing material slag 2 equably, can not form the cavity, simultaneously, compressive force also can be communicated to further portion, can be really and easily make the ground around the steel pipe pile 1 form compactingization, improve the supporting force of ground, thus, can improve the supporting force of steel pipe pile 1, owing to be filled in the expansion of steel pipe pile 1 inner slag 2, the expanded radially power of steel pipe pile 1 can to steel pipe pile 1 radially apply extruding force, thereby can increase the rigidity of steel pipe pile 1, on the other hand, the axial expansion power of steel pipe pile 1 can apply and upload the corresponding stress of loading (prestressing force) to steel pipe pile 1, can improve the supporting force of steel pipe pile 1 thus again.
The curing phenomenon that utilization is filled in steel pipe pile 1 outer peripheral portion slag 2 increases uniaxial compressive strength, can prevent aqueousization of ground, and improves supporting force.
The 2nd embodiment of pile construction method of the present invention has been shown among Fig. 3.
This embodiment is according to the character of ground etc., and appropriate combination is used the expansion rate slag different with water absorbing properties, to adapt to the ground of bad ground structure.
Also the same among this embodiment with above-mentioned the 1st embodiment, on ground, excavate excavated hole H, match with the external diameter and the degree of depth of predefined steel pipe pile 1, steel pipe pile 1 is inserted the degree of depth of regulation in this excavated hole H, simultaneously, the outer peripheral portion at this steel pipe pile 1 has expansile slag 2 with the density filling of stipulating.
In the present embodiment, do not fill slag in the inside of steel pipe pile 1, but also can the same slag of filling with above-mentioned the 1st embodiment.
In this case,, for example, shown in Fig. 3 (A), in argillic horizon H1, use the slag 2a that has mixed quicklime, in sand layer H2, use the preceding big slag 2b of expansion rate of burin-in process as the slag of filling at the outer peripheral portion of steel pipe pile 1.
In view of the above, mixed the slag 2a suction heating of quicklime in argillic horizon H1, slag 2a quick-hardening simultaneously, and can improve argillic horizon H1.Among the sand layer H2, the slag 2b that expansion rate is big can strong effectively layer of sand H2.
Shown in Fig. 3 (B), according to the expansion rate of change in depth slag, also can strong steel pipe pile 1 ground on every side.
Say that more specifically for example, use the little slag 2c of expansion rate at the upper position H3 place of steel pipe pile 1, lower position H4 place uses the big slag 2d of expansion rate.
Like this, the little slag 2c of expansion rate that is filled in steel pipe pile 1 upper position H3 place can at first harden, play the effect of lid, and the big slag 2d of the expansion rate that is filled in steel pipe pile 1 lower position H4 can be later than expansion, during sclerosis, expansion upward suffers restraints, and expands to peripheral direction, can further strong ground on every side.
The 3rd embodiment of pile construction method of the present invention has been shown among Fig. 4.
This embodiment longitudinally forms rib 11a, 11b with prescribed distance on the periphery of steel pipe pile 1, utilize these ribs 11a, 11b control to be filled in the slag 2 expansion position and the directions of steel pipe pile 1 outer peripheral portion.
This embodiment is also the same with above-mentioned the 1st embodiment, on ground, excavate excavated hole H, match with the external diameter and the degree of depth of predefined steel pipe pile 1, in this excavated hole H, insert steel pipe pile 1 with prescribed depth, simultaneously, the outer peripheral portion at this steel pipe pile 1 has expansile slag 2 with the filling of regulation density.
In this case, the outstanding length of rib 11a, the 11b that forms on the periphery of steel pipe pile 1 does not have particular determination, the slag 2 that just utilizes these ribs 11a, 11b will be filled in steel pipe pile 1 outer peripheral portion is separated up and down, in addition, the quantity of the rib that forms and also unqualified in the present embodiment at interval can be set arbitrarily according to the length of steel pipe pile 1, the character of ground etc.
The filling of slag 2, carry out simultaneously with insertion steel pipe pile 1, but in the sacks 20 such as made of paper, the synthetic resin system of at this moment also slag 2 can being packed into, fiber system, metal system (preferably after the piling can by the sack made of paper, plastic of water decomposition), slag 2 can not produced comes off, with this state configuration around steel pipe pile 1.
In view of the above, utilization is its rib 11a, 11b that vertically forms with prescribed distance in the periphery upper edge of steel pipe pile 1, can control the expansion position and the direction of the slag 2 that is filled in steel pipe pile 1 outer peripheral portion, on the steel pipe pile of constructing 1, find to have big frictional force effect as the joint stake, therefore, can further improve the supporting force of steel pipe pile 1.
As required, can locate to form rib 11x in the upper end of steel pipe pile 1 (ground line GL).
In view of the above, the slag 2 of steel pipe pile 1 upper end produces when expanding, and utilizes this expansion can prevent slag 2 to the extruding of ground line GL top, and slag 2 expansion energies of steel pipe pile 1 upper end play the effect of strong ground effectively.
The 4th embodiment of pile construction method of the present invention has been shown among Fig. 5.
This embodiment is that the upper position H5 that will insert the excavated hole of steel pipe pile 1 forms major diameter, and lower position H6 forms minor diameter, fills to have the section shape that expansile slag 2 forms different-diameter.
In this case, the degree of depth that forms large diameter upper position H5 can begin to be set at the dark degree of depth of 5～10m from ground line GL usually according to the settings such as character of ground.
In view of the above, can improve the ground supporting force that forms major diameter excavated hole upper position H5, also improve the supporting force (horizontal endurance) of steel pipe pile 1 thus.
The 2nd embodiment of pile construction method of the present invention has been shown among Fig. 6.
This embodiment excavates the grooving shape by a plurality of excavated hole that will insert steel pipe pile 1, and upper position H7 place is interconnected, and will have expansile slag 2 and be filled to planar.This situation, lower position H8 place is identical with the foregoing description, forms several independently excavated hole, fills to have expansile slag 2.
In this case, excavate the degree of depth of the upper position H7 of grooving shape, can set,, be set at the dark degree of depth of 5～10m usually from ground line GL according to the character of ground etc.
In view of the above, improve the ground supporting force at interconnective excavated hole place, upper position H7 place, further improved the supporting force (horizontal endurance) of steel pipe pile 1 thus.
When ground was the grittiness ground, even slag 2 solidifies, by being filled in the slag 2 at upper position H7 place, during earthquake, interstitial water also can successfully give off.
Embodiment
Following one side will compare with a stake example of constructing with rubble with the stake example of slag construction, Yi Bian be described more specifically the present invention.
[example 1-1]
The joint stake is used in stake, and the steel-making slag (100%) before the burin-in process below the outer peripheral portion filling particle diameter 10mm of stake is constructed pile.
[example 1-2]
The joint stake is used in stake, fills the mixture that is mixed by steel-making slag before the burin-in process below the 90% particle diameter 10mm and 10% gypsum at the outer peripheral portion of stake, constructs pile.
[example 1-3]
The joint stake is used in stake, fills the mixture that is mixed by steel-making slag before the burin-in process below the 70% particle diameter 10mm and the following water granulated slag of 30% particle diameter 2mm at the outer peripheral portion of stake, constructs pile.
[example 1-4]
The joint stake is used in stake, fills the mixture that is mixed by steel-making slag before the burin-in process below the 80% particle diameter 10mm and the following concrete waste material of 20% particle diameter 5mm at the outer peripheral portion of stake, constructs pile.
[comparative example 1]
The joint stake is used in stake, and the rubble (100%) below the outer peripheral portion filling particle diameter 10mm of stake is constructed pile.
[example 2-1]
Cylinder pile is used in stake, and the steel-making slag (100%) before the burin-in process below the outer peripheral portion filling particle diameter 10mm of stake is constructed pile.
[example 2-2]
Cylinder pile is used in stake, fills the mixture that is mixed by steel-making slag before the burin-in process below the 90% particle diameter 10mm and 10% gypsum at the outer peripheral portion of stake, constructs pile.
[embodiment 2-3]
Cylinder pile is used in stake, fills by 70% at the outer peripheral portion of stake, the steel-making slag and 30% before the burin-in process below the particle diameter 10mm, the mixture that the water granulated slag below the particle diameter 2mm mixes, and constructs pile.
[example 2-4]
Cylinder pile is used in stake, fills by 80% at the outer peripheral portion of stake, the steel-making slag and 20% before the burin-in process more than the particle diameter 10mm, the mixture that the concrete waste material below the particle diameter 5mm mixes, and constructs pile.
[comparative example 2]
Cylinder pile is used in stake, and the rubble (100%) below the outer peripheral portion filling particle diameter 10mm of stake is constructed pile.
The relation of loading and deflection was shown in Fig. 7 and Fig. 8 when the stake of constructing according to above-mentioned example and comparative example was applied loading.
From Fig. 7 and Fig. 8 as can be known, use slag stake (example) of constructing and the stake (comparative example) of constructing with rubble relatively, can confirm any one, the deflection when applying loading is very little, and a supporting force that can improve.Can confirm this trend, more remarkable during than the steel-making slag that uses separately before the burin-in process when mixed gypsum, water granulated slag etc. in the steel-making slag before mix using burin-in process.
Below also can confirm by actual tests, by utilizing the characteristic of steel-making slag imbibition, can improve the supporting force of stake.
Pilot system ground carried out with 3 stages.As the slag test portion, with the steel-making slag before the burin-in process as main component, to wherein adding gypsum, water granulated slag, concrete waste material etc.
The experiment of [experiment 1] round can
The steel pipe of external diameter 150mm end obturation is embedded in round can, and (slag is filled in φ 600mm, centre h900mm), and making its length of embedment is 450mm.Carry out open-air maintenance out of doors.Bottom surface at round can is provided with dewatering installation, and slag maintenance under more dried state is subjected to the brute force constraint from tank skin when expanding.
[experiment 2] large-scale soil box experiment
In the dark concrete system soil box of 5m, construct the artificial foundation of N value 25 with No. 5 broken sand, on this ground, excavate the cave of external diameter 400mm, dark 3m at interval, insert the steel pipe of external diameter 165mm or the band of pitch diameter same size and save steel pipe, around stake, fill slag with 1m.In soil box, add entry, reach the height of 500mm under the surface, maintenance is carried out in each stake.
The experiment of [experiment 3] field size
Probing investigation result, ground be the N value at the soft foundation below 10, existing the N value in 12m lower floor is 25 intermediate layer.Test pile is to use steel pipe pile (external diameter 457mm) and concrete joint stake (pitch diameter 440mm, diameter of axle 300mm), with the long 12m that is taken as of stake.The sequence of construction of test pile, owing to be the soft foundation of infiltration, insert sleeve pipe while excavating with auger, then insert 1 sleeve in inside, insert stake within it in the sleeve pipe of side, the an amount of slag of packing between outer tube and inner sleeve, the limit is rotated the internal and external casing limit and is moved up and down, and is built into slag layer around stake.
[experimental result]
To test the supporting force performance of foundation pile in 1,2 and 3, by the relation of load loading and deflection, the result who compares with the benchmark supporting force is shown in table 1, table 2 and table 3 respectively.
[table 1]
Supporting force that will straight stake (stake of light face) (broken sand of filled natural) is taken as 1 o'clock supporting force performance relatively (construction back the 28th day)
| Packing material | Construct the state of ground | The kind of test pile | Benchmark supporting force Pu 1(kN) | The benchmark supporting force relatively |
| The broken sand of goods | Pine is filled out | Linear pattern | 16 | ?1.0 |
| (5mm) 90%+ flyash 10% for the steel-making slag | Pine is filled out | Linear pattern | 42 | ?2.6 |
| (5mm) the 90%+ gypsum 10% for the steel-making slag | Pine is filled out | Linear pattern | 520 | ?32.5 |
| (5mm) the 80%+ Water Quenching Slag 20% for the steel-making slag | Pine is filled out | Linear pattern | 86 | ?5.4 |
| The steel-making slag (5mm) | Pine is filled out | Linear pattern | 52 | ?3.3 |
| (5mm) 75%+ Water Quenching Slag 20%+ gypsum 5% for the steel-making slag | Closely knit filling out | Linear pattern | 220 | ?13.8 |
| (5mm) 75%+ Water Quenching Slag 20%+ gypsum 5% for the steel-making slag | Closely knit filling out | The band joint | 360 | ?22.5 |
| The steel-making slag (10mm) | Closely knit filling out | Linear pattern | 320 | ?20.0 |
| The steel-making slag (5mm) | Closely knit filling out | The band joint | 176 | ?11.0 |
| (5mm) the 80%+ concrete waste material 20% for the steel-making slag | Closely knit filling out | Linear pattern | 295 | ?18.4 |
| (5mm) the 70%+ Water Quenching Slag 30% for the steel-making slag | Closely knit filling out | Linear pattern | 197 | ?12.3 |
*So-called benchmark supporting force is meant the supporting force when the stake footpath produces 10% deflection
[table 2]
Supporting force after maintenance a couple of days relatively
| Packing material | The test pile kind | 42 days | 98 days | Benchmark supporting force ratio | |
| Benchmark friend load Pu 1(kN) | Benchmark supporting force Pu 1(kN) | ||||
| | Linear pattern | 30 | ?59 | ?1.96 | |
| The band joint | 183 | ?219 | ?1.19 | ||
| The steel-making slag (10mm) | Linear pattern | 113 | ?108 | ?0.95 | |
| The band joint | 216 | ?373 | ?1.73 | ||
| (10mm) the 90%+ | Linear pattern | 235 | ?264 | ?1.12 | |
| The band joint | 822 | ?- | ?- | ||
| (10mm) the 70%+ | Linear pattern | 105 | ?258 | ?2.45 | |
| The band joint | 327 | ?644 | ?1.97 | ||
| (10mm) the 70%+ | Linear pattern | 230 | ?275 | ?1.19 | |
| (10mm) the 80%+ concrete waste material (5mm) 20% for the steel-making slag | Linear pattern | 136 | ?216 | ?1.59 | |
| The band joint | 244 | ?335 | ?1.37 |
*So-called benchmark supporting force is meant the supporting force when the stake footpath produces 10% deflection
[table 3]
The supporting force of inserting the straight steel pipe stake is that 1 o'clock supporting force performance compares
| Packing material | The test pile kind | 42 days | Benchmark supporting force ratio |
| Benchmark supporting force Pu 1(kN) | |||
| - | Linear pattern | 1036 | ?1.00 |
| The steel-making slag (5mm) | Linear pattern | 1258 | ?1.21 |
| (10mm) the 90%+ | The band joint | 2262 | ?2.18 |
| (10mm) the 70%+ | The band joint | 1572 | ?1.52 |
| The steel-making slag (10mm) | Linear pattern | 1077 | ?1.04 |
*So-called benchmark supporting force is meant the supporting force when the stake footpath produces 10% deflection
From table 1, table 2 and table 3 as can be known:
1. any situation compares with the situation of not using slag, owing to use slag, obtains very big supporting force performance.
2. form the change supporting force by slag, by adding gypsum, water granulated slag, concrete waste material increase supporting force.
3. straight stake (steel pipe pile) and pitch diameter joint stake (stake of concrete joint) with equivalent diameter relatively, the increase effect of supporting force, joint is more remarkable.
More than for pile construction method of the present invention, though be illustrated according to embodiment, the formation that the present invention is not limited to put down in writing in the foregoing description is with formation appropriate combination of putting down in writing among each embodiment etc., do not breaking away within its aim scope, it can constituted and do suitably change.
In the foregoing description, for stake, though used steel pipe pile, the material of stake is not limited in this, and the job practices of stake of the present invention is applicable to stakes arbitrarily such as concrete pile, (concrete pile that comprises the band joint), composite pile, on-the-spot piling.
The effect of invention
Invention according to technical scheme 1 record, expand by the slag that is filled in an outer peripheral portion, even the gap of the excavated hole of pitching pile and stake is very narrow, also can fill equably packing material, and not form the cavity, simultaneously, compression stress also can be communicated to further portion, easily and really make stake ground on every side form compacting, improved the supporting force of ground, also improved thus the supporting force of stake.
Expand by being filled in the inner slag of stake, with the power that is radially expanded, the footpath of stake is upwards applied extruding force, can increase the rigidity of stake, on the other hand, the axial expansion power of stake makes stake increase the stress (prestressing force) corresponding with uploading loading, can improve thus the supporting force of stake.
And then, considered with regard to aspects such as energy expenditures that because spending a large amount of expenses, the steelmaking slag that purposes is restricted had also obtained effective utilization in the past.
According to the invention of technical scheme 2 record, according to the ground character of constructing stake, such as argillic horizon, sandy soils, construct the purpose of stake etc., utilize the slag of adjusting expansion rate to expand, can make the ground around the stake strong to desired intensity.
The slag that is filled in a upper position plays lid effect (at this moment, the slag expansion rate that preferably will be filled in a upper position is adjusted to less), ground around can the be further strong stake lower position.
Invention according to technical scheme 3 records, utilization on the stake periphery along its rib that vertically forms with a determining deviation, can control the slag expansion position and the direction that are filled in an outer peripheral portion, thereby make the stake of constructing have effect the picture joint stake, the supporting force that can further improve thus.
According to the invention of technical scheme 4 records, can improve the ground supporting force that forms major diameter excavated hole position, improved thus the supporting force (horizontal endurance) of stake.
Invention according to technical scheme 5 records can improve the ground supporting force of the interconnective excavated hole of upper position position, thus, can further improve the supporting force (horizontal endurance) of stake.
When ground was the sand ground, even slag solidifies, during earthquake, Interstitial Water also can successfully give off.
According to the invention of technical scheme 6 records, owing to do not need steelmaking slag is carried out burin-in process, so can utilize steelmaking slag with low expense, thus make steelmaking slag obtain further effectively to utilize.
Claims (5)
1. the job practices of a stake is characterized in that, stake is inserted in the excavated hole, has expansile steel-making slag this peripheral part and/or inner the filling, improves the supporting force of stake by described slag is expanded.
2. according to the pile construction method of claim 1 record, it is characterized in that, according to the ground character of constructing stake, construct the purpose of stake, adjust the expansion rate of the slag of being filled.
3. according to the pile construction method of claim 1 record, it is characterized in that, with the upper position of the excavated hole of pitching pile form major diameter, lower position forms minor diameter, thereby slag is filled to the step-like of different-diameter.
4. according to the pile construction method of claim 1 record, it is characterized in that, several excavated hole upper positions of pitching pile are interconnected, be filled to the slag on top plane.
5. according to the pile construction method of claim 1 record, it is characterized in that, described steel-making slag is a principal component with the steel-making slag, and in the following material one or more have been mixed therein, these materials are steel-making slag, blast furnace slag, ferroalloy slag, Water Quenching Slag, copper smelting slag, red soil, flyash, refuse incineration slag, incinerator ash, the sludge silt after the burin-in process, and glass dust minces, waste gypsum, concrete waste material, gypsum, quicklime, cement, rubble, sand, clay, artificial material, mineral.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP402490/2000 | 2000-12-28 | ||
| JP2000402490 | 2000-12-28 | ||
| JP210112/2001 | 2001-07-11 | ||
| JP2001210112 | 2001-07-11 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011456787A Division CN1187501C (en) | 2000-12-28 | 2001-12-28 | Pile construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1598168A true CN1598168A (en) | 2005-03-23 |
| CN1296567C CN1296567C (en) | 2007-01-24 |
Family
ID=26607174
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011456787A Expired - Fee Related CN1187501C (en) | 2000-12-28 | 2001-12-28 | Pile construction method |
| CNB2004100683989A Expired - Fee Related CN1296567C (en) | 2000-12-28 | 2001-12-28 | Execution method of pile |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011456787A Expired - Fee Related CN1187501C (en) | 2000-12-28 | 2001-12-28 | Pile construction method |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN1187501C (en) |
| HK (2) | HK1048147B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359101A (en) * | 2011-07-28 | 2012-02-22 | 江苏建筑职业技术学院 | Foundation treatment method for collapsible soil |
| CN103352457A (en) * | 2013-07-20 | 2013-10-16 | 陈炯辉 | Soft foundation reinforcing method |
| CN104005404B (en) * | 2014-05-16 | 2016-01-13 | 德州市公路工程总公司 | A kind of pile for prestressed pipe of outsourcing active material pile body and construction method |
| CN107989040B (en) * | 2017-11-27 | 2020-09-15 | 云南建投第十一建设有限公司 | Construction method of geological pile punching hole containing expansive soil layer |
| CN108755652A (en) * | 2018-06-15 | 2018-11-06 | 中铁西安勘察设计研究院有限责任公司 | The basement process gauze granular media pilework of weak soil, sand foundation |
| CN110344427A (en) * | 2019-05-27 | 2019-10-18 | 中铁第四勘察设计院集团有限公司 | Supporter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4293242A (en) * | 1977-04-29 | 1981-10-06 | Stanley Merjan | Piles |
| CN86200550U (en) * | 1986-08-12 | 1987-04-01 | 上海铁路局科学技术研究所 | Steel slag pile for reinforcing soft soil foundation |
| GB2238567B (en) * | 1989-12-01 | 1994-02-16 | Bicc Plc | Foundation piles |
| JPH06116937A (en) * | 1992-10-01 | 1994-04-26 | Nissan Kensetsu Kk | Soft ground improving method |
| JPH07233527A (en) * | 1994-02-23 | 1995-09-05 | Toho Concrete Kk | Execution method for foundation pile |
| CN2313959Y (en) * | 1996-05-24 | 1999-04-14 | 邹宗煊 | Cement-soil hard cored composite pile for fountain |
-
2001
- 2001-12-28 CN CNB011456787A patent/CN1187501C/en not_active Expired - Fee Related
- 2001-12-28 CN CNB2004100683989A patent/CN1296567C/en not_active Expired - Fee Related
-
2003
- 2003-01-07 HK HK03100147.9A patent/HK1048147B/en not_active IP Right Cessation
-
2005
- 2005-07-11 HK HK05105802A patent/HK1073144A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1187501C (en) | 2005-02-02 |
| HK1073144A1 (en) | 2005-09-23 |
| CN1296567C (en) | 2007-01-24 |
| HK1048147A1 (en) | 2003-03-21 |
| HK1048147B (en) | 2005-06-03 |
| CN1362557A (en) | 2002-08-07 |
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