WO2006049326A1 - Pc構造物における真空引き工程を含むケ-ブルシ-ス内へのグラウト注入工法 - Google Patents
Pc構造物における真空引き工程を含むケ-ブルシ-ス内へのグラウト注入工法 Download PDFInfo
- Publication number
- WO2006049326A1 WO2006049326A1 PCT/JP2005/020669 JP2005020669W WO2006049326A1 WO 2006049326 A1 WO2006049326 A1 WO 2006049326A1 JP 2005020669 W JP2005020669 W JP 2005020669W WO 2006049326 A1 WO2006049326 A1 WO 2006049326A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable sheath
- grout
- sheath
- container
- vacuum pump
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Definitions
- Grout injection method into cable sheath including evacuation process in pc structure
- the present invention in a groin pouring method including a vacuum pulling process into a cable sheath of a post-tension type PC structure, a bright air puddle that is generated due to a forward flow of the groat in the cable sheath descending portion at the time of grau pouring is ensured.
- the present invention relates to a Darau injection method that can be easily removed.
- PC structures such as bridges, viaducts, buildings, etc.
- PC structures with boss tension system, cement, water, and admixture are placed between the inner wall of the cable sheath and the PC steel after tensioning and fixing the PC steel.
- the mixture is filled and filled with grout, but if the filling and filling of this grout is insufficient and there is a gap that is not filled with grout in the cable sheath, this gap will be filled for many years.
- External water may invade and the PC steel may be corroded and disconnected.
- One of the factors that cause voids in the cable sheath is the occurrence of air pockets due to the pre-flow of the glazing that occurs at the top or descending portion of the cable sheath when it is injected into the cable sheath.
- the exhaust grouse hose 1 1 is usually located at the top of the cable sheath 2 or near the height of the descending part.
- the grout G is reinjected into the air reservoir V.
- the reinjection grout hose 1 2 is connected to the exhaust grout hose 1 1 a, 1 1 b, and the reinjection grout hose 1 2 injects grout g
- the air remaining in the air reservoir V is discharged from the exhaust hose 1 ⁇ a, 1 1 b.
- a pressure feed pump is connected to the grout injection side of the cable sheath, and a vacuum pump is connected to the grout discharge side.
- Japanese Patent No. 3 5 8 4 0 2 4 and Japanese Patent Application Laid-Open No. 2 0 0 4-1 0 0 2 7 4 No. 2 and Japanese Patent Laid-Open No. 2 0 00-0 6 4 6 1 8.
- the duct (cable sheath) 2 communicates with the duct (cable sheath) 2 at a position where air pockets are likely to be generated.
- a vacuum hose 1 with a pressure- and negative-pressure structure that has a length that can be seen through, closes the tip and protrudes outside the PC structure 1 1 and is decompressed by operating the vacuum pump 1
- Fig. 3 a method is shown in which the filling state of the grout G in the cable sheath 2 is confirmed by using the rise of the injected grout while compressing the residual air.
- Patent Document 1 Japanese Patent No. 3 5 8 4 0 2 4
- Patent Document 2 Japanese Patent Laid-Open No. 2 0 0 4-1 0 0 2 7 4
- Patent Document 3 Japanese Patent Laid-Open No. 2 00 0-6-6 4 6 1 8 After operating the vacuum pump connected to the grout discharge side of the cable sheath to depressurize the inside of the cable sheath, the cable sheath In the case of a grouting method that includes a vacuuming process in which grouting is infused by a pumping pump connected to the injection side, the forward flow of the grouting occurs considerably later than in the grouting method using only the pumping pump. Also, since the air trapped by the pre-flow is dilute, the generated air pool is extremely small, but there is no guarantee that it will be completely eliminated.
- the discharge rate of the pump is determined so that the rate of increase of the pressure that rises due to the progress of the injection grough is equal to or less than the pressure reduction rate of the vacuum pump so that the pressure can always be maintained at 0.
- This enables continuous operation of the pressure pump, and in advance, the top of the cable sheath or the descending part where air may be trapped in the cable sheath due to the pre-flow of the grout during the grau injection.
- Boss tension system PC structure cable sheath is connected with a pressure pump on the grout injection side of the cable sheath and a vacuum pump on the discharge side, and the vacuum pump is continuously operated to constantly reduce the pressure inside the cable sheath. Injecting grout into the cable sheath by continuously operating the pressure pump ⁇ In the grout injection method including the vacuuming process of filling,
- a plurality of grau hoses that are branched in advance upward are installed in advance.
- the upper end is pulled out to the upper surface of the PC structure, and the upper ends of the plurality of grout hoses are connected to and inserted into a single sealed container arranged on the upper surface of the PC structure, so that the cable sheath communicates with it.
- Boss tension system A pressure pump is connected to the grout injection side of the cable sheath of the PC structure cable sheath and a vacuum pump is connected to the discharge side, and the vacuum pump is continuously operated to constantly reduce the pressure inside the cable sheath.
- the method of pouring grout which includes a vacuuming process that injects and fills grout into the cable sheath by continuously operating the pressure pump.
- a cable sheath is formed by pulling out the upper surface of the PC structure and communicating and attaching the sealed container disposed on the upper surface of the PC structure to each of the plurality of standing groin hoses.
- the inside of the closed container communicating with the pressure is reduced by the operation of the vacuum pump to become a reduced pressure container, the air confined in the top part or the descending part of the cable sheath is sucked into the reduced pressure container.
- the groin is sucked into the hose and the closed container until the air pressure in the closed container is balanced with the groin injection pressure of the feed pump.
- Grau Bok grouting to cable over scan in including vacuum step in P C structure characterized by and.
- Strength and shape that can withstand atmospheric pressure when the sealed container is decompressed It is made of a transparent material with a structure, and a release agent is applied to the inner wall surface, or the inner wall surface is subjected to water repellent treatment such as Teflon processing, silicon resin processing, etc.
- a method for injecting a grout into a cable sheath including the evacuation step in the PC structure according to any one of the preceding items (1) to (4).
- the volume of the airtight container depends on the viscosity of the gutter, the discharge rate, the inner diameter of the cable sheath and hose, the length of the hose, the inclination angle of the cable sheath descending part, the degree of pre-flow due to the void ratio, etc. Characterized in that the value calculated from the size of the air reservoir generated at the cable sheath descending part of the cable and the final Grau soot pressure applied to the air reservoir is set with sufficient allowance.
- (1) to (5) A method for pouring grout into a cable sheath including a vacuuming step in the PC structure according to any one of (1) to (5).
- the airtight container has a plurality of grout hose insertion portions, and the grout hose is removably attached to the insertion portion by an airtight connection means such as screwing. If the number exceeds the number of grout hoses to be attached, a stopper for keeping the airtightness of the hermetic container is inserted into the insertion portion where the grau hose is not attached. (1) to (5) Injecting Grau into the cable sheath including the vacuum stroke in the PC structure according to any one of the items
- the airtight container has an exhaust port equipped with an on-off valve, and can be connected to an independent second vacuum pump that is different from the vacuum pump connected to the grout discharge side of the cable sheath.
- a method for pouring grout into a cable sheath including the evacuation step in the PC structure according to any one of the preceding items (1) to (7). The following effects can be exhibited by the present invention.
- An airtight container placed on the PC structure branches and stands at the top or lower part of the cable sheath where air may be trapped in the cable sheath due to the pre-flow of the grau during the grau injection Since the cable sheath communicates with the cable sheath via the plurality of grooving hoses, the air trapped in the cable sheath descending portion is sucked into the sealed container decompressed by the operation of the vacuum pump, and Since the pressure inside the decompressed sealed container is balanced with the pressure of the pump feeding the groin, the groat rises and enters the hose and the sealed container, so the volume of the sealed container is selected appropriately.
- the pressure in the cable sheath is reduced by a vacuum pump by using a flowable grout. 5 0.
- IMP a is set, and the pressure increase rate in the cable sheath due to the progress of the injection grout is equal to or less than the pressure reduction rate by the vacuum pump. Therefore, it is possible to use the normally used water-sealed vacuum pump, and the pump pump required for the conventional construction method that is repeatedly operated and stopped repeatedly in response to changes in the vacuum inside the cable sheath.
- ON ⁇ 0 FF control equipment Eliminates the need for means and simplifies work procedures.
- the present invention (5) in addition to the effects of the present invention (1), (2) and (3),
- the airtight container is made of a transparent material, so that the grout that rises and enters the airtight container can be seen, so the grout hose is communicated and filled into the cable sheath at the branched position. Can be confirmed.
- a release agent is applied to the inner wall surface of the sealed container, or water repellent treatment such as Teflon processing and silicon resin processing is applied, so that the grout that has flowed into the sealed container can be easily removed after use. It can be washed away and the sealed container can be reused repeatedly.
- each grout hose Since the upper end of each grout hose is configured to be detachably attached to the closed container by means of close contact such as screwing, the closed container can only be connected to the grout hose when it is needed. It can be used by attaching it, and once the grouting has been completed, the grouting hose can be quickly removed to clean the sealed container.
- the present invention in addition to the effects of the present invention (1), (2), (3), (5) and (7),
- FIG. 1 is a configuration diagram of an embodiment in which a plurality of grouting hoses erected on a cable sheath are connected to one hermetic container.
- FIG. 2 is an explanatory diagram of an embodiment in which a collecting pipe connected to a grout hose is installed in a sealed container.
- FIG. 3 is a configuration diagram of an embodiment in which a hermetic container is connected to and inserted into each of a plurality of grout hoses standing on a cable sheath.
- FIG. 4 is an explanatory view of the grout pouring method of the present invention in the case where the cable sheath is disposed in the concrete structure with a plurality of peaks.
- FIG. 5 is a block diagram of an embodiment using a sealed container having an exhaust pipe equipped with an on-off valve.
- FIG. 6 is an explanatory diagram of the air pool generation.
- FIG. 7 is an explanatory view of a residual air exhaust structure in an air reservoir.
- FIG. 8 is an explanatory view of the exhaust of residual air in the air reservoir and the structure for injecting grout into the air reservoir.
- FIG. 9 is an explanatory view of a main part of the grout pouring method equipped with the vacuum hose disclosed in Japanese Patent No. 3 584 0 24. Explanation of symbols
- 1 PC structure
- 2 Cable sheath
- 3 Pressure pump
- 4 Vacuum pump
- 5 Grau ⁇ hose
- 6 Airtight container
- 7 On-off valve
- 8 Collecting pipe
- 1 1a Grout hose for exhaust
- Lib Glow hose for exhaust
- 12 Grow hose for re-injection
- 13 Vacuum hose
- G Grau
- V Air reservoir
- Fig. 1 is a block diagram of an embodiment in which multiple grout hoses standing upright on a cable sheath are connected to a single sealed container.
- Fig. 2 is an implementation in which a collecting pipe connected to the grout hose is installed in an airtight container.
- Fig. 3 is an explanatory diagram of the example, Fig. 3 is a block diagram of an embodiment in which a closed container is connected to and inserted into each of a plurality of grose hoses erected on the cable sheath, and
- Fig. 4 is a diagram of the cable sheath in the concrete structure.
- FIG. 5 is an explanatory diagram of the groin pouring method of the present invention in the case where a plurality of peaks are formed, and FIG. 5 is a configuration of an embodiment using an airtight container having an exhaust pipe equipped with an on-off valve FIG.
- 1 is a PC structure
- 2 is a sheath
- 3 is a pressure pump
- 4 is a vacuum pump
- 5 is a hose
- 6 is a sealed container
- 7 is an open / close valve
- 8 is a collecting pipe
- G is a gutter
- V indicates air accumulation.
- the first embodiment of the present invention has the configuration shown in FIG. 1, that is, the pump pump 3 is connected to the grout injection side of the cap sheath 2 of the PC structure 1 and the vacuum pump 4 is connected to the discharge side.
- the grout ⁇ ⁇ ⁇ ⁇ ⁇ G When the grout ⁇ ⁇ ⁇ ⁇ G is injected into the sheath 2, it communicates upward in advance to the top or lower part of the cable sheath 2, where air may be trapped in the cable sheath 2 due to the upstream flow of the grout G.
- a plurality of branch hoses 5 standing upright and the upper end of which is pulled out to the upper surface of PC structure 1, and the upper ends of the multiple graws hoses 5 are installed on the PC structure 1.
- the sealed container 6 may have any strength that is not deformed by atmospheric pressure when the inside thereof is depressurized to _0.05 to _0.1 MPa.
- various materials such as a spherical shape, a cylindrical shape, or a steel support frame can be considered.
- the closed container 6 rises into the closed container 6 to confirm that the cable sheath 2 at the position where the grau hose 5 is attached is filled with the grau so that it can be confirmed by the invading grau ⁇ G.
- It is preferably made of a material having transparency that allows the inside to be visually observed, such as acrylic resin, urethane resin, polyester resin, acrylic elastomer resin, urethane elastomer resin, and ionomer resin.
- the volume of the sealed container is: Grau ⁇ G viscosity, Graw ⁇ discharge amount of pumping pump 3, inner diameter of cable sheath 2 and crow ⁇ hose 5, length of grau hose 5, inclination angle of cable sheath 2 descending part The tip of the cable sheath 2 due to the porosity, etc. It is preferable to allow a sufficient margin for the value calculated from the degree of flow and the resulting size of the air reservoir V in the cable sheath 2 and the final Grau pressure applied to the air reservoir. In addition, before the grout cake G that has flowed into the sealed container 6 is solidified, the grout cake is washed and removed so that the sealed container 6 can be reused repeatedly.
- the airtight container 6 communicates with the top or descending part of the cable sheath in advance and branches.
- the cable container 2 is provided with a plurality of attachment portions for inserting the upper ends of the plurality of erected grow hose 5.
- the upper end of the grout hose 5 is inserted by a removable air-tight connection means such as screwing to the attachment portion. Is removed from the insertion portion and rises into the closed container. ⁇ The invaded grout cake G is washed away before solidifying to allow the closed container 6 to be reused.
- the airtightness of the closed container 6 can be maintained in the attachment parts to which the grau hose 5 is not attached.
- the plug is inserted by airtight connection means such as screwing.
- the plurality of caulking portions provided in the sealed container 6 are transferred to one collecting pipe 8 provided with the plural adhering parts, and the one collecting pipe 8 is attached to the sealed container. It is also preferable to provide a connecting portion to be connected, and it is also preferable that the sealed container 6 and one collecting pipe 8 have a single structure.
- an opening / closing valve 7 is provided at the grout hose insertion portion of the collecting pipe 8, only the opening / closing valve where the grau hose 5 is inserted is opened, and the opening / closing valve of the non-attachment portion is closed. It is also preferable to make it usable.
- the second embodiment of the present invention has the configuration shown in FIG. 3, that is, the pressure pump 3 is connected to the grout injection side of the cable sheath 2 of the PC structure 1 and the vacuum pump 4 is connected to the discharge side.
- the grout G When the grout G is injected into the sheath 2, it communicates upward in advance to the top or lower part of the cable sheath 2, where air may be trapped in the cable sheath 2 due to the upstream flow of the grout ⁇ G
- a plurality of branching grout hoses 5 are erected and the upper ends thereof are pulled out to the upper surface of the PC structure 1, and the upper surfaces of the PC structure 1 are placed in each of the plural grooving gutters 5 erected.
- Each of the closed containers 6 arranged and connected to each other is connected and attached, and the vacuum pump 4 is continuously operated so that the inside of the sheath 2 is always maintained at 0.05 to 0.1 MPa.
- the grout cake communicated and attached to each of the plurality of sealed containers 6 reduced in pressure to ⁇ 0.0 5 to ⁇ IMP a by the operation of the vacuum pump 4.
- the air trapped in the corresponding position of the cable sheath 2 is sucked into all or a part of the plurality of decompressed sealed containers 6 through the hose 5, and the pressure in the sealed container 6 is further pumped.
- a PC structure 1 without air trapping V in the cable sheath 2 is constructed by sucking the groat G into the groin hose 5 and the sealed container 6 until the groin injection pressure of the pump 3 is balanced.
- the cable sheath is arranged in a plurality of peaks in PC structure 1, and there are two or more places where air can be trapped in the cable sheath due to the forward flow of Grau G
- a plurality of grout hoses 5 are communicated with the cable sheath 2 at each location.Branch and standing, and the tip of the grout hose 5 is communicated with a sealed container. It is necessary to make it possible to suck the air trapped in the cable sheath in the sealed container 6 that is inserted and decompressed by the operation of the vacuum pump.
- FIG. 4 shows a configuration in which a plurality of grout hoses 5 erected on the cable sheath 2 are connected to and attached to a single sealed container 6. Even when 6 is connected and inserted, it is necessary to correspond to each of the multiple peaks. is there. Also, as shown in FIG. 5, an independent second vacuum pump (different from vacuum pump 4 connected to the grout discharge side in the cable sheath, provided with an exhaust port provided with on-off valve 7 in a sealed container ( (Not shown) can be connected, and even if the suction of residual air by the sealed container 6 is insufficient, the second vacuum pump is connected to the exhaust port and is operated. It is also preferable to open the exhaust opening / closing valve 7 so as to completely eliminate residual air.
- an independent second vacuum pump (different from vacuum pump 4 connected to the grout discharge side in the cable sheath, provided with an exhaust port provided with on-off valve 7 in a sealed container (Not shown) can be connected, and even if the suction of residual air by the sealed container 6 is insufficient, the second vacuum pump
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004322577A JP2006132201A (ja) | 2004-11-05 | 2004-11-05 | Pc構造物における真空引き工程を含むケーブルシース内へのグラウト注入工法 |
JP2004-322577 | 2004-11-05 |
Publications (1)
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WO2006049326A1 true WO2006049326A1 (ja) | 2006-05-11 |
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PCT/JP2005/020669 WO2006049326A1 (ja) | 2004-11-05 | 2005-11-04 | Pc構造物における真空引き工程を含むケ-ブルシ-ス内へのグラウト注入工法 |
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JP (1) | JP2006132201A (ja) |
WO (1) | WO2006049326A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101927528A (zh) * | 2010-07-30 | 2010-12-29 | 中铁四局集团第一工程有限公司 | 一种真空压浆施工设备及方法 |
CN102071811A (zh) * | 2010-12-20 | 2011-05-25 | 东南大学 | 钢绞线穿索用牵引机 |
CN102304894A (zh) * | 2011-07-01 | 2012-01-04 | 李跃军 | 一种桥梁预应力孔道灌浆质量控制方法及其装置 |
WO2016050979A1 (en) | 2014-10-03 | 2016-04-07 | Vsl International Ag | Tendons grouting with recirculation |
EP2885452A4 (en) * | 2012-08-14 | 2016-05-11 | David W Whitmore | PROTECTION AGAINST CORROSION OF CABLE IN A CONCRETE STRUCTURE |
CN109056550A (zh) * | 2018-10-17 | 2018-12-21 | 安徽升建工程管理有限公司 | 高温环境下桥梁底部加固用高压注浆设备 |
CN112282409A (zh) * | 2020-09-07 | 2021-01-29 | 中国建筑第八工程局有限公司 | 撑顶式碳纤维预应力张拉结构及张拉方法 |
Families Citing this family (7)
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JP4991984B2 (ja) * | 2006-12-08 | 2012-08-08 | 信 成井 | 縦向きpc緊張材挿通用シース内のグラウト充填方法 |
JP4982666B2 (ja) * | 2007-05-21 | 2012-07-25 | 信 成井 | Pc構造物におけるpc緊張材挿通用シース内へのグラウトの注入方法 |
CN102493359B (zh) * | 2011-12-29 | 2013-07-31 | 重庆市科学技术研究院 | 缆索真空灌锚的装置及方法 |
JP6197276B2 (ja) * | 2012-10-19 | 2017-09-20 | 株式会社大林組 | Pc部材のグラウトの充填度の評価方法 |
KR101503816B1 (ko) * | 2013-07-05 | 2015-03-18 | 컨텍이앤씨 주식회사 | 포스트텐션 교량의 쉬스관 내부 충진을 위한 진공 그라우팅 공법 |
CN103603273A (zh) * | 2013-11-04 | 2014-02-26 | 沈阳市政集团有限公司 | 一种预应力管道灌浆施工方法 |
KR20200132527A (ko) | 2019-05-17 | 2020-11-25 | 컨텍이앤씨 주식회사 | 포스트텐션 교량의 쉬스관 내부 충진을 위한 수두차 그라우트 충진공법 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004211528A (ja) * | 2002-10-11 | 2004-07-29 | Anderson Technology Kk | ポストテンション方式pc構造物の内ケーブルへのグラウト注入工法 |
-
2004
- 2004-11-05 JP JP2004322577A patent/JP2006132201A/ja active Pending
-
2005
- 2005-11-04 WO PCT/JP2005/020669 patent/WO2006049326A1/ja not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004211528A (ja) * | 2002-10-11 | 2004-07-29 | Anderson Technology Kk | ポストテンション方式pc構造物の内ケーブルへのグラウト注入工法 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101927528A (zh) * | 2010-07-30 | 2010-12-29 | 中铁四局集团第一工程有限公司 | 一种真空压浆施工设备及方法 |
CN102071811A (zh) * | 2010-12-20 | 2011-05-25 | 东南大学 | 钢绞线穿索用牵引机 |
CN102304894A (zh) * | 2011-07-01 | 2012-01-04 | 李跃军 | 一种桥梁预应力孔道灌浆质量控制方法及其装置 |
CN102304894B (zh) * | 2011-07-01 | 2014-08-13 | 李跃军 | 一种桥梁预应力孔道灌浆质量控制方法及其装置 |
EP2885452A4 (en) * | 2012-08-14 | 2016-05-11 | David W Whitmore | PROTECTION AGAINST CORROSION OF CABLE IN A CONCRETE STRUCTURE |
WO2016050979A1 (en) | 2014-10-03 | 2016-04-07 | Vsl International Ag | Tendons grouting with recirculation |
CN109056550A (zh) * | 2018-10-17 | 2018-12-21 | 安徽升建工程管理有限公司 | 高温环境下桥梁底部加固用高压注浆设备 |
CN112282409A (zh) * | 2020-09-07 | 2021-01-29 | 中国建筑第八工程局有限公司 | 撑顶式碳纤维预应力张拉结构及张拉方法 |
CN112282409B (zh) * | 2020-09-07 | 2022-07-12 | 中国建筑第八工程局有限公司 | 撑顶式碳纤维预应力张拉结构及张拉方法 |
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