• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for after-treatment of a cured layer of an initially form-free poured material, such as cement concrete, poured onto a substrate, wherein a layer of drainage channel is made in the layer that end up spaced apart in the layer and open into a cavity located in the layer optionally filled with a gas or liquid, and wherein a source of liquid material is connected to the supply channel and the material flows through the supply channel and flows into the cavity while a suction source connected to the discharge channel causes a pressure reduction within the cavity and maintains and optionally sucks the material out of the cavity.
    公开号:NL2017600A
    申请号:NL2017600
    申请日:2016-10-10
    公开日:2017-04-24
    发明作者:Mak Pjotr
    申请人:Volkerrail Nederland Bv；
    IPC主号:
    专利说明:

    Cavity-filling vacuum after-treatment HSB bridge floor
    The invention relates to the post-treatment of a structure of initially form-free, stone-like material, such as cement concrete, for example high-strength concrete (hereinafter referred to as: HSB), in particular of a bridge floor.
    In the following the invention is described on the basis of HSB, however, the invention is also applicable to other constructions of initially form-free, stone-like material (preferably poured into the work), whether or not supported by a bridge floor.
    Heavy steel traffic in particular means that a steel bridge deck (also known as a bridge driving floor), in particular an orthotropic steel bridge driving floor (for example from the Galecoppen Bridge in the A12 motorway near the city of Utrecht in the Netherlands) is increasingly suffering from fatigue cracking. By removing the road surface usually present on top of the bridge running floor, for example asphalt pavement of asphalt concrete, from the bridge deck, the steel surface is exposed to be inspected and repaired if necessary.
    FIG. 1 shows a cross-section of a bridge deck and FIG. 2 shows a detail thereof on a larger scale. The drawing is enclosed to better explain the invention.
    FIG. 1 shows a schematic cross-section of an exemplary bridge deck, a horizontal steel plate 7 with V-shaped or trough-shaped reinforcing profiles (reinforcing trough) welded thereto at the bottom.
    Recently, a reinforcement net was installed on the steel plate (the asphalting or other road surface on top of it) was removed and then HSB 1 was deposited. The reinforcement mesh is, for example, mounted on the steel plate via strips or L-profiles 8 welded to the steel plate (only 1 of the many profiles 8 is shown in Fig. 1 for illustration). Preferably, an adhesive layer is applied to the steel plate over the entire upper surface, for example an adhesive (e.g. epoxy, e.g. 2 mm thick), onto which grains (dia. Larger than adhesive thickness, e.g. between 3 and 6 mm) are sprinkled (e.g. bauxite).
    The HSB is poured into the work in a thickness between 5 and 15, for example 9 cm, over the reinforcement mesh, so that the reinforcement mesh is fully embedded under sufficient coverage HSB (for example a minimum of 1 or 2 cm coverage). The HSB, for example, contains steel fibers as reinforcement. During dumping, the HSB is relatively dry and does not spread or hardly spontaneously flow out, so that the deposited HSB must be mechanically loaded to spread well and intensive compacting with vibrating tools is required, moreover work must be carried out quickly due to the relatively rapid hardening of the HSB . After hardening, a wear layer is applied to the HSB, for example an adhesive (such as epoxy) which is sprinkled with granules, for example bauxite. The cars drive on the wear layer.
    After curing, the HSB must be examined for cavities 4 (see Fig. 1) which inevitably arise due to the difficult processing of the HSB, as a rule in the lower half of the HSB and / or near the steel plate 7. With the current detection methods at the most, one is able to determine the shape and location of a cavity approximately. These cavities often have a whimsical shape, comparable to a stalactite cave. The height of the cavity, i.e. the dimension in thickness direction of the HSB layer, generally measures between 0.5 and 3 cm. Cavities have been found which, viewed from above on the bridge surface, have a shape that is reminiscent of the letter M. An attempt has been made to fill these cavities by tapping the cavities from the road surface and form-free filling material through these drilled channels with overpressure to press into the cavities. Per cavity, an average of approximately 50 tapped channels are required to achieve a sufficient filling of a cavity through pressing and it is almost never possible to completely fill a cavity.
    The object of the invention is to make the complete filling of the cavities reliable and / or to reduce the number of tapped channels and / or to have to keep the roadway shorter or not at all out of service.
    To that end, it is proposed to suck instead of or in addition to presses to get the desired material, preferably a form-free material that subsequently subsequently cures, such as an epoxy or other plastic or mono or polymer, into the cavity and substantially to be completely filled.
    The suction offers the possibility of supplying the material from the bottom of the HSB layer to the cavity, so that the road surface can remain untouched so that the roadway can remain in operation while the cavities are tapped and filled.
    By sealing the HSB, such as by applying a sealing layer above the HSB, for example a foil, it can be better ensured that no false air is sucked in from above the HSB during suction.
    FIG. 2 shows a detail of fig. 1. According to the invention, channels are made in the HSB, for example, drilled. This can be done from the top (channels 2, 3) or from the bottom (channels 5, 6). It is ensured that these channels open into a cavity 4 below the surface of the HSB, such a cavity 4 is generally located above the steel plate 7 at least 1 or 2 cm below the upper surface of the HSB 1, so it is hermetically sealed off from the outside air . The channels 2, 3 are drilled up to the steel plate 7 or end at a distance above it. The channels 5, 6 are drilled through the steel plate 7 and terminate at a distance below the upper surface 1 of the HSB. By thus ensuring that blind channels are made, it is ensured that the channels 2, 3, 5, 6 have a closed end. Alternatively, these ends can be sealed after the channels have been made, after the channels have been pierced, for example through the plate 7.
    On a supply channel 2 resp. 5 and a discharge channel 3 respectively. 6, a pipe is preferably connected so that a fluid-tight communication between channel and pipe is created, for example by inserting a pipe or hose into the channel and completely filling the annular space between pipe and channel wall with sealing material. The pipe is sucked to channel 3 resp. 6 by connecting it to a suction source, for example vacuum source or underpressure source. Channel 2 resp. 5 connected to a source of form-free filling material with which the cavity 4 must be filled.
    The suction source ensures that the pneumatic or hydrostatic pressure in the cavity 4 is lowered and that this pressure reduction is maintained so that there is preferably an underpressure in the cavity 4. The suction source preferably causes a pressure reduction, preferably relative to the ambient air pressure or the pressure prevailing in the material supplied via the supply channel upstream of the cavity, for example in the supply channel or the mouth of a press source, of at least 10 or 100 or 500 Pa or 1 or 5 or 10 or 20 or 50 or 75 kPa (100 kPa = ambient air pressure at sea level), so that, for example, there is a pressure in the cavity of at most 0.01 or 0.025 or 0.05 or 0.1 or 0 , 25 or 0.5 or 0.8 bar, for example at a pressure between 0.95 or 0.99 and 1 bar in the surrounding atmosphere. This pressure reduction is preferably such that it is channeled through 5 and filling material flowing into the cavity 4 experiences a reduced pressure. Optionally, the suction is limited when applied with active (by a mechanical press source) or passive (only by gravity) pressing that only the excess pressure is compensated by the pressing so that the cavity prevails approximately the same as in the surrounding atmosphere.
    As a result of the pressure reduction due to suction, all the air present in the cavity 4 or another liquid or gaseous medium, for example used for the prior flushing, is displaced.
    As a rule, at the start of the treatment, the cavity 4 will be filled with water that is present therein unintentionally as a result of the inadequate processes during the pouring and hardening of the HSB. The filler material used is preferably of a type with a high water-absorbing capacity, for example a minimum of 5 or 10 or 12% by volume of water-absorbing capacity. In a preferred embodiment, the cavity 4 is first flushed to either replace the water with a gas, such as air, or with a liquid for which the filling material has an even greater water-absorbing capacity. If the filler material is of 2 or more component type, for example where curing does not begin until 2 or more components have been mixed, it could be flushed with filler material from which 1 or more components have been omitted so that no curing occurs.
    Alternatively it could be rinsed with, for example, acetone or with filler material at a temperature so that curing is considerably slower or not even done. Rinsing is also preferably carried out with suction, preferably also with the pressure values indicated above.
    The filling material is preferably liquid during the procedure of sucking into the cavities, for example substantially comparable to liquid water, for example a viscosity of about 1 mPa.s. The filler material preferably has a viscosity that meets the following conditions: minimum 0 or 0.01 or 0.1 mPa.s and / or maximum 50 or 100 or 1000 or 10,000 or 100,000 mPa.s (the values in this paragraph at 20 degrees Celsius).
    Optionally, via two or more supply channels 2, 5 and / or discharge channels 3, 6, the filling material is supplied to the cavity or fluid is sucked out of the cavity.
    The underpressure is preferably maintained after completion of the filling of the cavity with filling material, for which purpose, for example, a fluid-tight seal is provided upstream and downstream of the cavity in the inlet and outlet, e.g. 6 connected pipes to include a stopcock. Thus, the filling material will cure while there is a pneumatic and / or hydrostatic vacuum in the cavity.
    If the fluid medium flowing to the cavity via the supply channel tends to flow automatically (passive pressing), for example assisted by gravity, for example when the fluid level of the fluid material in the source is at a higher level than the cavity It is ensured that the suction source provides sufficient suction so that the fluid medium is sucked through the suction source to the cavity and out of the discharge channel so that there is underpressure in the cavity.
    In an exemplary application, the process comprises one or more of the following steps: the stony material is sealed to make it more gas-tight, for example by laying a film over it; supply and discharge channels opening into the cavities spaced apart from one another are made in the poured, preferably in-work, initially form-free, cured stony material; the supply channel is connected to a source of fluid flushing or filling material; the discharge channel is connected to a, preferably mechanical, suction source; the fluid medium contained in the cavity is drained from the cavity via suction via the discharge channel; fluid medium is drawn into the cavity through the suction source, flowing through the supply channel, optionally this medium is actively or passively pressed into the supply channel, for example through a mechanical press source; while fluid material flows in through the supply channel into the cavity, a pressure reduction, preferably negative pressure in the cavity, is maintained by the suction source; at the beginning of the hardening of the fluid material drawn into the cavity, pressure reduction, preferably underpressure, is maintained in the cavity.
    This document discloses many measures in mutual coherence and also discloses these measures separately from this cohesion, as independent measures. Each of these independent measures individually or in combination with one or more other independent measures forms the invention.
    权利要求:
    Claims (15)
    [1]
    A method for after-treatment of a cured layer of an initially form-free pouring material, such as cement concrete, poured onto a substrate, wherein in the layer a supply and discharge channel are made which end at a distance from each other in the layer and end up in a the cavity that is low, optionally filled with a gas or liquid, and wherein a source of liquid material is connected to the supply channel and the material flows through the supply channel and into the cavity while a suction source connected to the discharge channel causes a pressure reduction causes and maintains inside the cavity and possibly sucks the material out of the cavity.
    [2]
    Method according to claim 1, wherein the liquid material is supplied from the bottom of the cement concrete to the cavity, and preferably the roadway located on top of the cement concrete remains in operation.
    [3]
    3. Method according to claim 1 or 2, the cement concrete is sealed, for example by applying a sealing layer on it.
    [4]
    Method according to any of claims 1-3, channels are made in the cement concrete, which open into a cavity (4) in the cement concrete (1).
    [5]
    A method according to any one of claims 1-4, the suction source ensures that the pneumatic or hydrostatic pressure in the cement concrete, preferably the cavity (4), is lowered and that this pressure reduction is maintained so that an underpressure preferably prevails in the cement concrete.
    [6]
    6. Method as claimed in any of the claims 1-5, the suction source ensures a pressure reduction, preferably with respect to the ambient air pressure or the pressure that prevails in the material supplied via the supply channel upstream of the cavity, for example in the supply channel or the mouth of a pressure source of at least 10 or 100 or 500 Pa or 1 or 5 or 10 or 20 or 50 or 75 kPa (100 kPa = the ambient air pressure at sea level), so that, for example, there is a pressure in the cavity of at most 0.01 or 0.025 or 0.05 or 0.1 or 0.25 or 0.5 or 0.8 bar, for example at a pressure between 0.95 or 0.99 and 1 bar in the surrounding atmosphere.
    [7]
    7. Method according to one of claims 1-6, the pressure reduction is such that the filling material flowing through a channel (2, 5) and into the cavity (4) experiences an underpressure; and / or due to the pressure reduction due to sucking, all air contained in the cavity 4 or other liquid or gaseous medium, for example used for prior flushing, is displaced.
    [8]
    A method according to any one of claims 1-7, the filling material used is of a type with high water-absorbing capacity, for example a minimum of 5 or 10 or 12 vol. % water absorbing capacity; and / or the cavity (4) is first flushed to either replace the water with a gas, such as air, or with a liquid, preferably for which the filling material has an even greater water-absorbing capacity.
    [9]
    9. Method according to any of claims 1-8, the filling material is, during the procedure of sucking into the cavities, easily liquid, for example substantially comparable to liquid water, for example a viscosity of about 1 mPa.s; and / or the filler material has a viscosity that meets the following conditions: minimum 0 or 0.01 or 0.1 mPa.s and / or maximum 50 or 100 or 1000 or 10,000 or 100,000 mPa.s.
    [10]
    10. Method according to any of claims 1-9, the underpressure is maintained after completion of the filling of the cavity with filling material; and / or the filler material will cure while there is a pneumatic and / or hydrostatic vacuum in the cavity.
    [11]
    11. Method according to one of claims 1-10, fluid medium is sucked in through the suction source through the suction source, flowing through the supply channel, optionally this medium is actively or passively pressed into the supply channel, for example through a mechanical press source.
    [12]
    A method according to any one of claims 1-11, applied to a traffic bridge with steel bridge deck, in particular with an orthotropic steel bridge floor and / or with V-shaped or trough-shaped stiffening profiles.
    [13]
    The method according to any of claims 1-12, wherein the running surface is first removed.
    [14]
    A method according to any one of claims 1-13, wherein the cement concrete comprises a reinforcement net, preferably mounted on the road floor by mounting means.
    [15]
    The method of any one of claims 1-14, wherein the cement concrete is poured onto an adhesive layer.
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    同族专利:
    公开号 | 公开日
    NL2017600B1|2017-10-02|
    引用文献:
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    US3865075A|1973-10-04|1975-02-11|Atomic Energy Commission|Slab impregnation apparatus|
    JP2007277809A|2006-04-03|2007-10-25|Nippon Adox Kk|Curing construction method of curing material|
    JP2013241760A|2012-05-18|2013-12-05|Ps Mitsubishi Construction Co Ltd|Method for injecting rust-proofing agent aqueous solution into cavity inside sealed pc tendon insertion sheath in existing pc structure|
    法律状态:
    2020-03-25| PD| Change of ownership|Owner name: VOLKERWESSELS INTELLECTUELE EIGENDOM B.V.; NL Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: VOLKERRAIL NEDERLAND B.V. Effective date: 20200317 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL2015626|2015-10-15|EP16193399.9A| EP3156545A1|2015-10-15|2016-10-11|Cavities filling vacuum post treatment hsb bridge driving deck|
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