CN101910560A - Steel pipe for reinforcing foundation, method of reinforcing foundation using the same, and method of reinforcing structure - Google Patents
Steel pipe for reinforcing foundation, method of reinforcing foundation using the same, and method of reinforcing structure Download PDFInfo
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- CN101910560A CN101910560A CN2009801015105A CN200980101510A CN101910560A CN 101910560 A CN101910560 A CN 101910560A CN 2009801015105 A CN2009801015105 A CN 2009801015105A CN 200980101510 A CN200980101510 A CN 200980101510A CN 101910560 A CN101910560 A CN 101910560A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
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Abstract
Disclosed is a steel pipe for reinforcing the foundation driven in the foundation and usable for injecting an injection material into the foundation. The steel pipe comprises recessed parts and flat smooth parts disposed on the outer periphery of the pipe and a plurality of through holes that are formed in the recessed parts or the flat smooth parts and communicate with the inside and the outside of the steel pipe.
Description
Technical field
The present invention relates in construction of tunnel etc. advance support (being subjected to け earlier) job practices, excavate in the reinforced construction method etc. of wall employed ground stabilization with the method for the tectosome on steel pipe, the foundation reinforcement method that has used this steel pipe and reinforced concrete basis etc.
The application is willing to 2008-009570 number application based on the spy who filed an application in Japan in 18th in 01 month in 2008, advocates its priority and quotes its content.
Background technology
For example, (mountain) goes up when implementing construction of tunnel on soft mountain, land, adopts the advanced supporting construction method of burying steel pipe in order to reinforce the mountain, land underground more.In this job practices, the embedding steel pipe is holed outside the drilling rod of punchinging (rod) that leading section has been mounted drill bit (bit) is gone up.Then, after the boring of having carried out prescribed depth, former state fixedly stays steel pipe and extracts the drilling rod of punchinging, and injects the injection material of mortar (motor) etc. to the inside of steel pipe.Tube portion at steel pipe is provided with the inside and outside a plurality of through holes of connection.The injection material that injects to inside is penetrated into the mountain, land by this through hole and solidifies.Thus, soft mountain, land is reinforced.Content about advanced supporting construction method (for example with reference to patent documentation 1 and patent documentation 2) on the books in a plurality of patent applications.
Employed steel pipe is embedded in the mountain, land in above-mentioned advanced supporting construction method.Therefore, use the steel pipe of the low and material that intensity is big of price comparison.When injection material is injected into, the injection material that flows out by above-mentioned through hole is fully infiltrated in the mountain, land, and closely be filled in the gap between mountain, land and the steel pipe.In addition, for the firmly fixing steel pipe of being buried underground, the layer of the injection material of this steel pipe and its peripheral part is firmly become one.
Yet, because the external surface of in the past steel pipe is formed level and smooth face, can block between the layer of steel pipe in the past and outside injection material and end (draw つ and hang か り), so can not claim its both to be firmly fixed.In order to improve this situation, there is the external surface of pair steel pipe to carry out blasting treatment etc. so that the method for surperficial roughening.Yet, though can obtain certain driving fit (adherence) effect by this method, for steel pipe firmly is fixed in the mountain, land this point not enough.
In addition, in patent documentation 3, as the ground stabilization steel pipe, disclose at peripheral part and formed spiral helicine raised line, in the spacer portion of this helical form raised line, be provided with the ground stabilization steel pipe that is used to make a plurality of through holes of injection material inside and outside the connection of the outside of steel pipe outflow.
Patent documentation 1: TOHKEMY 2000-204870 communique
Patent documentation 2: TOHKEMY 2001-020657 communique
Patent documentation 3: TOHKEMY 2006-022501 communique
But, in above-mentioned patent documentation 3 disclosed steel pipes, be provided with protuberance, so this protuberance is provided with (in piling and Das Let at the outer peripheral face of steel pipe) and become obstruction during steel pipe.In addition, become obstruction at this protuberance when the external surface side of steel pipe is discharged sand.Therefore, this protuberance can not form big shape, is difficult to guarantee enough adaptations.In addition, for the outer peripheral face at steel pipe is provided with protuberance, need after making steel pipe, the operation by other process protuberance.Therefore, productivity is poor, but also the problem that exists cost to increase.
Summary of the invention
The present invention is used to address the above problem, its purpose be to provide a kind of ground stabilization with steel pipe, used the foundation reinforcement method of this steel pipe and the reinforcement means of structure, this ground stabilization can not increase manufacturing cost with steel pipe, and the resistance when burying underground in ground is little, and steel pipe and the firmly driving fit reliably of its periphery when pouring into reinforcement material.
The present invention is in order to solve above-mentioned problem and to reach purpose of the present invention and adopt following method.
(1) ground stabilization of the present invention is arranged in the ground by piling with steel pipe, is used for injecting injection material to this ground, it is characterized in that possessing: recess and partes glabra are configured in the outer peripheral face of this ground stabilization with steel pipe; And a plurality of through holes, be positioned at above-mentioned recess or above-mentioned partes glabra, and be communicated with this ground stabilization with inside and outside the steel pipe.
(2) about the section shape of above-mentioned recess, preferably when the external diameter of above-mentioned steel pipe was D, above-mentioned concave depth was that the width of 0.005D～0.2D and above-mentioned recess is 0.015D～2D; The section shape of above-mentioned recess be the width of triangle, above-mentioned recess be B, when above-mentioned concave depth is H, B/H=3～20.
(3) about the section shape of above-mentioned recess, preferably when the external diameter of above-mentioned steel pipe was D, above-mentioned concave depth was that the width of 0.005D～0.2D and above-mentioned recess is 0.015D～2D; The section shape of above-mentioned recess be the width of quadrangle, above-mentioned recess be B, when above-mentioned concave depth is H, B/H=4～20.
(4) about the section shape of above-mentioned recess, preferably when the external diameter of above-mentioned steel pipe was D, above-mentioned concave depth was that the width of 0.005D～0.2D and above-mentioned recess is 0.015D～2D; The section shape of above-mentioned recess for width semicircle or trapezoidal, above-mentioned recess be B, when above-mentioned concave depth is H, B/H=3～20.
(5) preferred above-mentioned recess is provided with a plurality of on the same circumference of above-mentioned steel pipe.
(6) preferred above-mentioned recess is provided with a plurality ofly on the circumferencial direction of above-mentioned steel pipe, avoids at least relative above-mentioned recess is arranged on the same circumference of above-mentioned steel pipe.
(7) preferred above-mentioned recess is provided with a plurality of on the direction that tilts with respect to the axle of above-mentioned steel pipe.
(8) axle of preferred above-mentioned recess and above-mentioned steel pipe is provided with a plurality of abreast.
(9) preferably the time, be provided with the above-mentioned recess of a plurality of circles from the above-mentioned recess of top view.
(10) surface of preferred above-mentioned steel pipe has been implemented coating or resin covering.
(11) foundation reinforcement method of the present invention, when consolidated subsoil, drive piles setting as above-mentioned (1) described ground stabilization steel pipe while undermining, it is characterized in that, piling be provided with this ground stabilization with steel pipe after, inject injection material to above-mentioned ground stabilization with the outside of steel pipe via above-mentioned a plurality of through holes with the inside of steel pipe from this ground stabilization.
(12) preferred above-mentioned ground stabilization is bigger than the external diameter of employed inboard drill bit when excavating above-mentioned ground with the minimum diameter of steel pipe.
(13) preferred above-mentioned ground stabilization is littler than the external diameter of employed outside drill bit when excavating above-mentioned ground with the maximum outside diameter of steel pipe.
(14) reinforcement means of tectosome of the present invention, when comprising concrete tectosome and reinforce, drive piles above-mentioned (1) described ground stabilization steel pipe is set while excavating this tectosome, it is characterized in that, piling be provided with this ground stabilization with steel pipe after, inject injection material to above-mentioned ground stabilization with the outside of steel pipe via above-mentioned a plurality of through holes with the inside of steel pipe from this ground stabilization.
The invention effect
Above-mentioned (1) described ground stabilization is formed with recess with steel pipe at the outer peripheral face of steel pipe, and therefore this recess can not be subjected to resistance when burying underground in ground.In addition, when the outer peripheral face to steel pipe pours into injection material, also be filled injection material in the recess, therefore improved the adaptation between steel pipe and the ground.Its result can reduce the radical of burying underground when constructing, and can reduce construction cost, shorten the construction period.
In addition, above-mentioned (1) described ground stabilization only is provided with recess at outer peripheral face with steel pipe, and steel pipe can be made between directly by the roller with protuberance.Therefore, production efficiency can not reduce, and manufacturing cost is also low than previous methods.
In addition, if use above-mentioned (1) described ground stabilization steel pipe, also can be suitable equally for the reinforcing of the structure of the concrete foundation of for example building etc., can be with the firm reinforcing of the original enforcement of low one-tenth.
Description of drawings
Fig. 1 is the front view of expression ground stabilization of the present invention with an example of steel pipe.
Fig. 2 A is the figure of expression ground stabilization of the present invention with an example of steel pipe.
Fig. 2 B is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 C is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 D is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 E is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 F is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 G is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 H is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 I is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 J is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 2 K is the figure of expression ground stabilization of the present invention with the variation of steel pipe.
Fig. 3 A is the figure of expression ground stabilization of the present invention with the concrete example of the recess of steel pipe.
Fig. 3 B is the figure of expression ground stabilization of the present invention with other concrete examples of the recess of steel pipe.
Fig. 3 C is the figure of expression ground stabilization of the present invention with other concrete examples of the recess of steel pipe.
Fig. 3 D is the figure of expression ground stabilization of the present invention with other concrete examples of the recess of steel pipe.
Fig. 4 is expression ground stabilization of the present invention with the figure of the relation of the width of the recess of steel pipe and the degree of depth.
Fig. 5 is the figure of the production line of the common forging welding steel pipe of expression.
Fig. 6 is that the figure of ground stabilization of the present invention with an embodiment of the production line of the forging welding steel pipe of steel pipe made in expression.
Fig. 7 A is the schematic diagram of employed roller in the manufacturing of expression steel pipe of the present invention.
Fig. 7 B is the schematic diagram of employed roller in the manufacturing of expression steel pipe of the present invention.
Fig. 8 is that other the figure of embodiment of ground stabilization of the present invention with the production line of the forging welding steel pipe of steel pipe produced in expression.
Fig. 9 is that the partial sectional view of the ground stabilization of the drilling rod of punchinging of being with drill bit with the leading section of steel pipe inserted in expression.
Figure 10 A is the figure of the evaluation method of the closing force among the expression embodiment.
Figure 10 B is the figure of the evaluation method of the closing force in the expression comparative example.
Figure 11 is the figure that the effect of embodiment has been compared in expression.
Description of reference numerals
1 steel pipe
2 recesses
3 through holes
4 outside drill bits
5 ground stabilization steel pipes
The specific embodiment
Below, specify the present invention with reference to accompanying drawing.
Fig. 1 schematically shows ground stabilization of the present invention steel pipe 5.With steel pipe 5, be provided with recess 2 about this ground stabilization at the peripheral part of steel pipe 1 at certain intervals circle-shapedly.By this recess 2, can improve the frictional force between steel pipe 1 and ground or the concrete etc.
In addition, on the whole peripheral surface of steel pipe 1, dispose the inside and outside a plurality of through holes 3 that are communicated with steel pipe 1.The injection material that injects to the inside of steel pipe 1 flows out to outer surface of steel tube by these through holes 3.The part of this injection material is filled between mountain, land and the steel pipe 1, thus fixedly mountain, land and steel pipe 1.In addition, part mountain infiltration landwards and curing in addition, thus reinforce this mountain, land.At this moment, recess 2 becomes the state in the layer that is embedded in the injection material that has solidified, and both are firmly integrated.Therefore, even, produce card by the engaging between this recess 2 and the injection material layer and end resistance, thereby prevent moving of steel pipe 1 to the axial power of steel pipe 1 effect.
By said structure, to use in the steel pipe 5 in the ground stabilization of present embodiment, injection material has improved the adaptation between steel pipe 1 and the mountain, land, more fixedly steel pipe 1 and mountain, land.Reference numeral 4 expression outside drill bits among Fig. 1.
In this ground stabilization with in manufacture method of steel pipe 5, produce steel pipe 1 by pipe production line after, (Hot Inter between the hot-zone) or warm interval (Wen Inter) in, only by the Surface Machining recess 2 of pressure exerting arrangement to steel pipe 1.Therefore, productivity and common tubulation operation are much at one.
Fig. 2 A～2K shows the concrete example of other shapes of recess 2.
Fig. 2 A, 2B, 2C have recess 2A～2C on the circumferencial direction of any steel pipe 1, be formed with a plurality of this recess 2A～2C on direction of principal axis at certain intervals.The ground stabilization of Fig. 2 A is the examples that are provided with a plurality of (being opposed 2 among the figure) recess 2A on the same circumference of steel pipe 1 with steel pipe 5.The ground stabilization of Fig. 2 B is not to use stack with the recess 2 of steel pipe 5 and forms, be by can near or the device for exerting of keeping out of the way the reciprocation type of steel pipe 1 form.Recess 2B is the roughly the same degree of depth on the circumference of steel pipe 1.The ground stabilization of Fig. 2 C is to be provided with a plurality of recess 2C on the circumferencial direction of steel pipe 1, wherein not have the relatively example of the recess 2C of (closing う to か い) at least on same circumference with steel pipe 5.
Shown in the steel pipe 1 of Fig. 2 C, with the relative recess 2C staggered (Qian Birds of the mode on same circumference not) configuration, to compare with the steel pipe 1 of Fig. 2 A, the position that recess 2C is configured increases the intensity of steel pipe 1.The intensity that steel pipe 1 shown in Fig. 2 C is suitable for the part that the intensity to ground steel pipe for use in reinforcement 5, particularly recess 2 is configured has the situation of requirements at the higher level.In the interconnected example of recess 2C, preferably all do not overlapping (ラ Star プ な い) on the width with the opposed part of recess 2C.
Fig. 2 D～2G is that expression is formed with the figure of steel pipe 1 that has the recess 2D～2G on long limit with respect to the axle of steel pipe 1 on tilted direction.Fig. 2 H and Fig. 2 I are the figure that expression is formed with the steel pipe 1 of the recess 2H, the 2I that have long limit on the direction of the axle that is parallel to steel pipe 1.Fig. 2 J and Fig. 2 K are the figure of steel pipe 1 that expression is formed with recess 2J, the 2K of round point shape (toroidal).Recess 2J, the 2K of point-like can freely select from ellipse, polygonal etc. according to the aspects such as complexity that form.In addition, be configured in recess 2D～2G on the same circumference or alternate configurations becomes staggered etc. and also can freely select.
At this, only aspect height, the inner surface of steel pipe 1 is guaranteed only can to get final product by the space of excavating bur in the restriction of the shape of recess 2D～2G.
Ground stabilization of the present invention forms recess 2 as described later with steel pipe 5 between the hot-zone or in the warm interval.Therefore, even for example the wall thickness of steel pipe 1 is also can make easily more than the 2mm.Therefore, in the ground stabilization of making heavy wall with steel pipe 5, on one side and this ground stabilization for example rotate when squeezing into ground with steel pipe 5, use steel pipe 5 to act on twisting resistances to this ground stabilization, can prevent ground stabilization steel pipe 5 bendings or front end breakage.In addition, as ground stabilization with steel pipe 5, can easily make can be practical the above steel pipe of external diameter 50mm.
Ground stabilization of the present invention with steel pipe 5 in its purposes special requirement under the corrosion proof situation, preferably on the surface of the aforesaid steel pipe 1 that constitutes recess 2, implement coating or resin covers, thereby bring into play good corrosion resistance.
About the recess 2 of steel pipe 1, shown in Fig. 3 A～3D, it is leg-of-mutton situation and the tetragonal situation of section that basic section shape is arranged.It is identical with leg-of-mutton situation that semicircle and trapezoidal situation can be thought haply.Under any situation, for the side face that obtains steel pipe 1 and the frictional force between ground or the concrete etc., the degree of depth (degree of depth that the refers to the darkest part) H that need make recess 2 is 0.005 * D (wherein, D: outer diameter of steel pipes).But, also reach capacity owing to surpassed the effect that 0.2 * D then improves frictional force, so the depth H of recess 2 is in the scope of 0.005 * D～0.2 * D.In addition, in order to obtain above-mentioned frictional force, the width B that need make recess 2 is more than 0.015 * D.Yet if surpass 2 * D, the effect that improves frictional force is little, and therefore need make width B is below 2 * D.
In addition, under above-mentioned prerequisite, when the optimization of the shape that has realized recess 2, stipulate that following item is important.That is, when the section shape of recess 2 is triangle, B/H=3～20.When the section shape of recess 2 is quadrangle, B/H=4～20.When the section shape of recess 2 is semicircle or trapezoidal, B/H=3～20.
Below, use Fig. 4 that the derivation process of the relation of above-mentioned B/H is described.As prerequisite, the failure mode at recess 2 places is that the outside by recess 2 is some the deciding in the bearing strength of cement-soil of inside of the shear strength of cement-soil on the leg-of-mutton base (width B of recess 2) among Fig. 4 and recess 2.At this moment,, then decide intensity, think that intensity reduces by this failure mode if some failure modes are obviously serious with respect to another failure mode.Therefore, when considering the optimum shape of recess 2, need to find two above-mentioned simultaneous shapes of failure mode.
Its result in the optimum shape of recess 2, requires to apply pressure-bearing (pressure) the bearing capacity P and the shearing force S that applies shear strength of intensity and satisfies the equilibrium conditions formula of following formula (1).
S＝Pcosθ (1)
Wherein, θ: the angle of going into the side of the surface of steel pipe 1 and recess 2.
At this, shearing force S is defined as area * shearing force that shearing force acts on.Therefore, shearing force S comes fixed patternization by following formula (2).At this, suppose situation at the entire circumference configuration recess 2 of steel pipe 1.Shearing area is represented with the amassing of width B (leg-of-mutton base part) of the girth π D and the recess 2 of steel pipe 1.
S＝τ·B·π·D (2)
On the other hand, bearing capacity P is that bearing pressure multiply by the area that is acted on, and comes fixed patternization by following formula (3).
P＝H·σb·cosθ·π·D (3)
τ: shear stress, D: outer diameter of steel pipes, σ b: bearing capacity (bearing pressure, the dimension of power/area (dimension))
Following formula (4), (4 ') have just been derived in substitution formula (2), (3) and arrangement in formula (1).
τ·B＝(H·σb·cosθ)cosθ(4)
∴B/H＝σb·cos
2θ/τ (4′)
Formula (4 ') is the formula after the condition of balance on force formula (1) when optimum shape is provided is out of shape.At this, in the side of recess 2 be that angle (θ) between the surface of the leg-of-mutton inclined-plane of Fig. 4 and steel pipe 1 is under the situations (following with this shape as triangle) of 45 degree, find the solution under the situations of 90 degree (following with this situation as quadrangle).
If θ=90 ° (recess 2 is a quadrangle form), then
B/H＝σb/τ (5)
For example, as if bearing strength σ b=1N/mm with cement-soil
2, shear strength τ=0.1N/mm
2Substitution (5) formula, B/H=10 (width of recess 2 be height 10 times) then, the rectangle that is shaped as long limit 10H, height H of recess 2.
On the other hand, if final recess 2 be shaped as triangle, and this triangle is isosceles triangle, then B, H, θ satisfy following relational expression (6).
tanθ＝2·H/B (6)
If with this formula substitution formula (4 '), then
2/(sinθ·cosθ)＝σb/τ (7)
If the bearing strength σ b=1N/mm of substitution cement-soil in this formula (7)
2, shear strength τ=0.1N/mm
2, then
sinθ·cosθ＝1/5 (8)
sin2θ＝2/5＝0.4 (8′)
∴θ＝11.8
If the bearing strength σ b of cement-soil (concrete) and the relation of shear strength τ are made as
1/20≤τ/σ b≤2/9 (τ/σ b=1/10 degree usually),
(a) under the dimetric situation of being shaped as of recess 2, through type (5), the width B of recess 2 and the relation of depth H are as follows,
4.5≤B/H≤20.0。
(b) under the leg-of-mutton situation of being shaped as of recess 2, through type (7), the scope of suitable θ is as follows,
5.8≤θ≤31.4。
At this moment, through type (6), the width B of recess 2 and the relation of depth H are as follows,
3.3≤B/H≤19.8。
At this, though for such direction of principal axis shown in Fig. 2 D～2K with respect to steel pipe 1 tilt, the situation of the recess 2 of parallel or point-like, the C-C section of the A-A section of Fig. 2 D, the H-H section of Fig. 2 H, Fig. 2 J is suitable for above-mentioned formula and gets final product.
According to above content, the B/H regulation among the present invention is as follows:
When (1) section shape of recess 2 is triangle, B/H=3～20.
When (2) section shape of recess 2 is quadrangle, B/H=4～20.
When (3) section shape of recess 2 is semicircle or trapezoidal, B/H=3～20.
Then, the manufacture method of ground stabilization of the present invention with steel pipe 5 described.
In the present invention, also can be suitable for by one or several operation among following (a) and (b), (c), (d), be that typical example illustrates the present invention with the production line of forging welding steel pipe.
(a) utilize the electric welded steel pipe production line, after the electric welding welding, heat this steel pipe, exerted pressure in its surface by pressure exerting arrangement.
(b) utilize between the hot-zone or warm interval welded steel pipe production line, after welding, exerted pressure in its surface by pressure exerting arrangement.
(c) utilize the forging welding pipe production line, dash close after, by pressure exerting arrangement exerted pressure in its surface.
(d) utilize seamless steel tube production chain, behind tubulation, exerted pressure in its surface by pressure exerting arrangement.
Fig. 5 is the figure of the production line of common welded tube.
Is that the steel band 10 of desired width is configured as the section toroidal by roller 21 with slitting.Then, paramount heat is heated at its both ends, and carry out crimping, dash and to close by roller 22.Carry out pull and stretch (Twisted り Write む by roller 23～34 afterwards) so that the pipe undergauge that dashes after closing is the size of regulation.Then, be cut to the length of regulation by cutting off machine 38, by after roller 35～37 put shape in order, thereby produce welded tube 11 (steel pipe 1).
Fig. 6 is an embodiment of welded tube production line.
With respect to production line in the past, only changed pull and stretch roller (Twisted り ロ one Le before the cutting off machine 38) final roller 34.This roller 34 on the side face of roller 34, is provided with 1 or a plurality of protuberance α along roll axial direction shown in Fig. 7 A, 7B.With this protuberance α as pressure exerting arrangement.In that up and down both sides or a side are used the roller 34 that is provided with this protuberance α.2 roller 34a, 34b up and down have been shown in Fig. 6,7A～7B, but also can have constituted 1 group of roller more than 3.By such roller with protuberance α 34, (about 1200～1300 ℃ of degree) welded tube 11 of high temperature is exerted pressure.Therefore, the part of the welded tube 11 that contacts with this protuberance α easily forms recess 2.And, with cold working relatively, the shape of recess 2 forms the corresponding shape of shape with the protuberance α of roller 34.Therefore, obtained the more recess 2 of acute angle.Then, be cut to the length and the setting of regulation, thereby finished the ground stabilization of the present invention steel pipe 5 of band recess 11a.
At this, under the situation of the height of the recess 2 on the hope change welded tube 11, width, spacing, shape, the spacing of the protuberance α of change roller 34 get final product.In addition, under the situation that in roller 34a, 34b both sides up and down protuberance α is set, wishes to form in identical position, the position on the welded tube 11 with recess 2, make the position initial alignment of the protuberance α of roller 34a, 34b up and down, for example link roller 34a, 34b up and down by a drive source and Hooks coupling universal coupling etc., driven in synchronism roller 34a, 34b up and down gets final product.
Shown in Fig. 7 B, the shape of formed protuberance α is preferably at the central part height of roller 34, low more to the end of roller 34 more on the roller 34.Peripheral speed in the central part of roller 34 and end is different.Therefore, big end peripheral speed becomes big in the footpath.Therefore, because the pipe that the speed ratio of roller 34 passes through is faster, can apply useless power to welded tube 11.Its result has applied necessary above distortion, twisted to welded tube 11.
Fig. 8 is the example of other welded tube production line.
In this example is the example that special-purpose water booster system (pressure exerting arrangement) 39 to welded tube 11 (steel pipe 1) pressurization is set between pull and stretch roller 34 and cutting off machine 38.As water booster system 39, can be roller 34 with above-mentioned protuberance α, in addition, also can be with the form of up and down clamping device to the kind of welded tube 11 pressurizations.In addition, these water booster system 39 preferred mechanisms that can advance and retreat or can on the direction of advance of welded tube 11, advance and retreat with respect to welded tube 11.
In addition, can move to the direction of advance of welded tube 11 by making water booster system 39, can with the advancing of welded tube 11 with the formation device of the mobile reducing diameter part in step ground.Thus, above-mentioned like that because of the difference of the peripheral speed of the central part of roller 34 and end cause to useless twisted etc. can not taking place that welded tube 11 applies, the shape of recess 2 also can freely form.
More than, isolated plant is illustrated, also can make the roller 34 that on existing final pull and stretch roller, is provided with protuberance α have such function.
As mentioned above, pipe-making method can be based on the pipe-making method of electric welding, between the hot-zone or the pipe-making method that welds of warm interval, based on the pipe-making method of forging welding, in the seamless pipe-making method any.Heat in the tubulation process or behind the tubulation etc., under the state between warm interval or hot-zone, exerted pressure in the surface of this tubulation, can carry out the manufacturing of the steel pipe 1 of the band recess 2 under the on line state by pressure exerting arrangement.
And the steel pipe 1 that produces by above-mentioned manufacture method forms recess 2 between the hot-zone, even therefore the wall thickness of steel pipe 1 is also can easily make more than the 2mm.For example, while rotating as steel pipe pile when squeezing into ground, because the wall thickness of steel pipe 1, even therefore to steel pipe 1 effect twisting resistance, this steel pipe 1 can be not crooked yet, front end also can be damaged.In addition, as ground stabilization with steel pipe 5, can easily make can be practical the above steel pipe of external diameter 50mm.And it is identical during the common forging welding steel pipe of production efficiency and manufacturing.
In the manufacture method of above-mentioned such steel pipe, utilize the production line of common steel pipe, come tubulation by the special-purpose roller that is provided with projection, when making steel pipe, recess 2 is set continuously.In addition, the shape of the jut α by changing special-purpose roller 34, can at random be provided with shape freely, at interval, the recess 2 of configuration.In addition, do not need to process, the steel pipe 1 of the low-down band recess 2 of price can be provided by other operations.
With in the steel pipe 5, the inner surface side to steel pipe 1 is provided with convex form (being recess 2) as described above in ground stabilization of the present invention, but not the external surface side, therefore this recess 2 can not become obstruction when piling is provided with steel pipe 1.In addition, can make the ground stabilization that to guarantee the big recess of having of sufficient adaptation 2 at low cost with steel pipe 5 not reducing under the productive situation.
On the steel pipe 1 that is provided with recess 2, implement the perforation of a plurality of through holes 3 then.Through hole 3 can be arranged on the recess 2 on the perisporium of steel pipe 1, also can be located at the partes glabra beyond the recess 2.Perhaps also can be arranged on above-mentioned on both.The diameter of through hole 3, configuration can be the whole total lengths that spreads all over injection material, also can come arbitrary decision according to the state of the ground of the proterties of the strengthening agent that injects and/or injection.
Fig. 9 is that the drill bit 4,7 of usefulness and the figure that the position of steel pipe 5 is used in ground stabilization are excavated in expression.By transmitting the power of coming from drilling rod 6 and inboard drill bit 7, outside drill bit 4 rotation on one side is Yi Bian excavate the ground etc. in the place ahead.The rear of sidetracking head 4 disposes ground stabilization of the present invention steel pipe 5 outside.Therefore, external diameter little get final product of the external diameter of steel pipe 5 than outside drill bit 4 used in ground stabilization.
In addition, ground stabilization has been passed drilling rod 6 and inboard drill bit 7 with the inboard of steel pipe 5.Therefore, the minimum diameter of steel pipe 1 need be bigger than the maximum outside diameter of inboard drill bit 7.Satisfying under the situation of above-mentioned condition, can as far as possible the degree of depth of the recess 2 on steel pipe 1 perisporium set bigger value.
When using this ground stabilization with steel pipe 5, as shown in Figure 9, the drilling rod 6 of punchinging that leading section has been mounted inboard drill bit 7 is inserted through in this steel pipe 1, make the inboard drill bit 7 of leading section outstanding from the outside drill bit 4 of steel pipe 1, the rearward end of this punching drilling rod 6 and steel pipe 1 is connected with hammer drill (omitting diagram).And, provide strike, rotation and thrust to hole from hammer drill to punching drilling rod 6 and steel pipe 1.Also provide water or compressed air in the boring, and discharge from the leading section of outside drill bit 4 from hammer drill.The major part of the landwaste that produces because of boring is discharged by the inboard of steel pipe 1, and a part is discharged by the rear, lateral of steel pipe 1.
Boring in prescribed depth finishes, and after steel pipe 1 was embedded in the mountain, land, punching drilling rod 6 and inboard drill bit 7 rearward were drawn out from steel pipe 1 together.Then, injection device (omitting diagram) is installed, injection material is pressed in the steel pipe 1 in the rearward end of steel pipe 1.This injection material is full of in the steel pipe 1, and flows out to the outside by a plurality of through holes 3 that are arranged on this steel pipe 1.Then, along the external surface of steel pipe 1 flow on one side, infiltrate on one side in the mountain, land and solidify.Thus, reinforced the mountain, land.
Because this steel pipe 1 is formed with recess 2 at its peripheral part, this recess 2 becomes the state in the layer that is embedded in the injection material after the curing, and both are firmly integrated.Therefore, even, end resistance, thereby prevented moving of steel pipe 1 owing to the engaging between this recess 2 and the injection material layer produces card to the axial power of steel pipe 1 effect.Like this, steel pipe 1 firmly is fixed in the mountain, land.Because can also improving, the section shape that recess 2 has regulation, the flowability that therefore can improve injection material, landwaste be used to prevent that the card that breaks away from from ending resistance.
Above-mentioned recess 2 forms by stack usually.Therefore, its section shape is the mild shape that does not have rib portion and bight.Therefore, landwaste, injection material can flow swimmingly, can not produce local obstruction, space.Therefore, not only can make the discharge of landwaste in good condition, can also improve the adaptation between injection material and the steel pipe 1, can realize excellent ground stabilization effect.In the above description, as drill bit, adopted the leading section that is fixed on steel pipe 1 ring-type outside drill bit 4 and be installed in the combined drill of inboard drill bit 7 of the leading section of the drilling rod 6 of punchinging, also can use and to enlarge the scalable drill bit that dwindles bore, it is big and hole in when boring bore to be expanded as external diameter than steel pipe 1, when boring finished, it is little and pull out from the rear that bore is punctured into internal diameter than steel pipe 1.In this case need be at the fixing ring bit (outside drill bit) 4 of the leading section of steel pipe 1.
Embodiment
Then, come the comparison closing force with following level and be described.Level is made as 3 levels in the table 1.Size:
Specification STK
[table 1]
| Comparative example 1 | Straight tube | Common straight tube |
| Comparative example 2 | The steel pipe of band protuberance | Periphery helical form built-up welding welded steel pipe (TOHKEMY 2006-22501)＜built-up welding size〉height 5mm * width 5mm * helical pitch 300mm, lead angle 30 degree |
| Embodiment | The steel pipe of band recess | Apply the steel pipe＜stairstepping of recess〉stairstepping: leg-of-mutton end difference is set in a circumferential direction, (the interval 200mm of ladder) degree of depth 8mm * width 40mm equally spaced is set on tube axial direction |
Shown in Figure 10 A, 10B, the evaluation method of closing force is to bury ground stabilization underground with steel pipe 5 in cement- soil 100, and 101 applies load, instrumentation maximum load (estimating adaptation by maximum load) from top.Figure 10 A is the figure that is shown schematically in the evaluation method when having buried ground stabilization of the present invention with steel pipe 5 underground.Figure 10 B be shown schematically in buried underground as a comparative example 2 be provided with the steel pipe 102 of protuberance 103 time the figure of evaluation method.
Cement-soil 100 has used the cement-soil that has mixed soil and curing compound.At this moment, soil has used 2 examples of cohesive soil and sand soil.The particle diameter of cohesive soil is 0.001～0.005mm, and the particle diameter of sand soil is 0.074～2.000mm.Its result, as shown in figure 11, the present invention compares release (giving as security ぬ I) load with other comparative example big, that is and, closing force is big.
The ground stabilization that is formed with recess of the present invention is the roughly the same degree of manufacturing cost with the straight tube of comparative example 1 with the manufacturing cost of steel pipe.On the other hand, need to add the built-up welding welding cost that forms protuberance in the tubulation cost of the band protuberance steel pipe of comparative example 2.Therefore, its cost uprises.As mentioned above as can be known aspect cost the present invention also very outstanding.
Industrial applicibility
According to above explanation obviously as can be known, foundation stabilization steel pipe of the present invention is the steel pipe that has formed recess at the outer peripheral face of in the past steel pipe, can be low-cost and the tectosome on the ground of Strengthening Tunnel engineering etc. or reinforced concrete basis etc. efficiently.
Claims (14)
1. ground stabilization steel pipe, being driven piles is arranged in the ground, is used for injecting injection material to this ground, it is characterized in that possessing:
Recess and partes glabra are configured in the outer peripheral face of this ground stabilization with steel pipe; And
A plurality of through holes are positioned at above-mentioned recess or above-mentioned partes glabra, and are communicated with this ground stabilization with inside and outside the steel pipe.
2. ground stabilization steel pipe according to claim 1 is characterized in that,
About the section shape of above-mentioned recess, when the external diameter of above-mentioned steel pipe was D, above-mentioned concave depth was that the width of 0.005D～0.2D and above-mentioned recess is 0.015D～2D;
The section shape of above-mentioned recess be the width of triangle, above-mentioned recess be B, when above-mentioned concave depth is H, B/H=3～20.
3. ground stabilization steel pipe according to claim 1 is characterized in that,
About the section shape of above-mentioned recess, when the external diameter of above-mentioned steel pipe was D, above-mentioned concave depth was that the width of 0.005D～0.2D and above-mentioned recess is 0.015D～2D;
The section shape of above-mentioned recess be the width of quadrangle, above-mentioned recess be B, when above-mentioned concave depth is H, B/H=4～20.
4. ground stabilization steel pipe according to claim 1 is characterized in that,
About the section shape of above-mentioned recess, when the external diameter of above-mentioned steel pipe was D, above-mentioned concave depth was that the width of 0.005D～0.2D and above-mentioned recess is 0.015D～2D;
The section shape of above-mentioned recess for width semicircle or trapezoidal, above-mentioned recess be B, when above-mentioned concave depth is H, B/H=3～20.
5. ground stabilization steel pipe according to claim 1 is characterized in that,
Above-mentioned recess is provided with a plurality of on the same circumference of above-mentioned steel pipe.
6. ground stabilization steel pipe according to claim 1 is characterized in that,
Above-mentioned recess is provided with a plurality of on the circumferencial direction of above-mentioned steel pipe,
At least avoid relative above-mentioned recess is arranged on the same circumference of above-mentioned steel pipe.
7. ground stabilization steel pipe according to claim 1 is characterized in that,
Above-mentioned recess is provided with a plurality of on the direction that tilts with respect to the axle of above-mentioned steel pipe.
8. ground stabilization steel pipe according to claim 1 is characterized in that,
The axle of above-mentioned recess and above-mentioned steel pipe is provided with a plurality of abreast.
9. ground stabilization steel pipe according to claim 1 is characterized in that,
From the above-mentioned recess of top view the time, be provided with the above-mentioned recess of a plurality of circles.
10. ground stabilization steel pipe according to claim 1 is characterized in that,
The surface of above-mentioned steel pipe has been implemented coating or resin covers.
11. a foundation reinforcement method when consolidated subsoil, is provided with the described ground stabilization steel pipe of claim 1 while undermine to drive piles, it is characterized in that,
Piling be provided with this ground stabilization with steel pipe after, inject injection material to above-mentioned ground stabilization with the outside of steel pipe via above-mentioned a plurality of through holes with the inside of steel pipe from this ground stabilization.
12. foundation reinforcement method according to claim 11 is characterized in that,
Above-mentioned ground stabilization is bigger than the external diameter of employed inboard drill bit when excavating above-mentioned ground with the minimum diameter of steel pipe.
13. foundation reinforcement method according to claim 11 is characterized in that,
Above-mentioned ground stabilization is littler than the external diameter of employed outside drill bit when excavating above-mentioned ground with the maximum outside diameter of steel pipe.
14. the reinforcement means of a tectosome when comprising concrete tectosome and reinforce, is driven piles the described ground stabilization steel pipe of claim 1 is set while excavate this tectosome, it is characterized in that,
Piling be provided with this ground stabilization with steel pipe after, inject injection material to above-mentioned ground stabilization with the outside of steel pipe via above-mentioned a plurality of through holes with the inside of steel pipe from this ground stabilization.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-009570 | 2008-01-18 | ||
| JP2008009570A JP2009167752A (en) | 2008-01-18 | 2008-01-18 | Steel pipe for ground reinforcement and method of ground reinforcement using it |
| PCT/JP2009/050568 WO2009091041A1 (en) | 2008-01-18 | 2009-01-16 | Steel pipe for reinforcing foundation, method of reinforcing foundation using the same, and method of reinforcing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101910560A true CN101910560A (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801015105A Pending CN101910560A (en) | 2008-01-18 | 2009-01-16 | Steel pipe for reinforcing foundation, method of reinforcing foundation using the same, and method of reinforcing structure |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2009167752A (en) |
| KR (1) | KR20100093117A (en) |
| CN (1) | CN101910560A (en) |
| WO (1) | WO2009091041A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226338A (en) * | 2011-04-12 | 2011-10-26 | 中国十九冶集团有限公司 | Method for reinforcing bearing platform foundation with soil bearing capacity less than 0.1Mpa |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071679B (en) * | 2010-12-29 | 2012-07-04 | 西安建筑科技大学 | Method for consolidating existing building foundation |
| JP5965778B2 (en) * | 2012-08-16 | 2016-08-10 | エスティーエンジニアリング株式会社 | Long mirror bolt method |
| JP6221512B2 (en) * | 2013-08-27 | 2017-11-01 | 新日鐵住金株式会社 | Roll stand for forming recess in stepped steel pipe, roll drawing mill equipped with the same, and method for manufacturing stepped steel pipe |
| JP6515325B2 (en) * | 2015-02-26 | 2019-05-22 | 日本製鉄株式会社 | Reinforcement structure of reinforced steel pipe and concrete structure |
| JP6460835B2 (en) * | 2015-02-26 | 2019-01-30 | 新日鐵住金株式会社 | Reinforcing structure of concrete structure and method of reinforcing the same |
| JP6307136B2 (en) * | 2016-09-27 | 2018-04-04 | 植村 誠 | Open shield method |
| JP6307135B2 (en) * | 2016-09-27 | 2018-04-04 | 植村 誠 | Open shield method |
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| JPH0540935Y2 (en) * | 1988-06-06 | 1993-10-18 | ||
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| JPH11280394A (en) * | 1998-03-27 | 1999-10-12 | Tokai Rubber Ind Ltd | Resin-made lock-bolt and its manufacture |
| JP2997237B2 (en) * | 1998-05-19 | 2000-01-11 | 株式会社ケー・エフ・シー | Rock bolt |
| JP2002081300A (en) * | 2000-09-07 | 2002-03-22 | Masato Yamada | Lock bolt fixing method of mountain tunnel and water stop packing therefor |
| JP2005061002A (en) * | 2003-08-11 | 2005-03-10 | Nisshin Steel Co Ltd | Spill-proof method for steel pipe expansion type lock bolt |
| JP4502730B2 (en) * | 2004-07-06 | 2010-07-14 | 株式会社奥村組 | Steel pipe for ground reinforcement |
| JP2006106085A (en) * | 2004-09-30 | 2006-04-20 | Brother Ind Ltd | Karaoke system and program |
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- 2009-01-16 WO PCT/JP2009/050568 patent/WO2009091041A1/en active Application Filing
- 2009-01-16 KR KR1020107015640A patent/KR20100093117A/en not_active Application Discontinuation
- 2009-01-16 CN CN2009801015105A patent/CN101910560A/en active Pending
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| JPS6221200U (en) * | 1985-07-23 | 1987-02-07 | ||
| JPH03247899A (en) * | 1990-02-26 | 1991-11-06 | Taisei Corp | Driving method for rock bolt or the like |
| JP2007085157A (en) * | 2005-08-24 | 2007-04-05 | Nippon Steel Corp | Steel pipe pile with recess, its manufacturing method, and composite steel pipe pile using the steel pipe pile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102226338A (en) * | 2011-04-12 | 2011-10-26 | 中国十九冶集团有限公司 | Method for reinforcing bearing platform foundation with soil bearing capacity less than 0.1Mpa |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20100093117A (en) | 2010-08-24 |
| JP2009167752A (en) | 2009-07-30 |
| WO2009091041A1 (en) | 2009-07-23 |
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