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1. 发明专利

JPH03285089A CATHODIC PROTECTION DEVICE 失效
公开(公告)号：JPH03285089A
公开(公告)日：1991-12-16
申请号：JP8433390
申请日：1990-03-30
申请人： TOKYO GAS CO LTD , SHIMIZU CONSTRUCTION CO LTD
发明人： AOKI HIROYUKI , YANO NOBUHIKO , SANO MASAMI , SUGA MAKOTO , UENO MAMORU , NAKAJIMA TAKASHI , SAKAMOTO SHUNICHI , KITA NAOKI , TAKAGI MITSUO , WAGA HIDEETSU , TANAKA YOSHITOSHI
IPC分类号： C23F13/00 , C23F13/14 , C23F13/18
摘要： PURPOSE:To obtain the cathodic protection device with less protrusions on the surface of a steel material and capable of being brought into close contact with the surface of the backfilling steel material by setting a galvanic anode in a pit embedded apart from the steel material in soil and with its peripheral wall pierced with many holes and bringing the anode into electrical contact with the steel material close to the soil surface. CONSTITUTION:An underground continuous wall 5 is constructed, and then a steel material 2 constituting a storage tank is set in the cathodic protection device 1. A pit 3 is provided between the material 2 and the wall 5 close to the wall 5, and a galvanic anode 4 is inserted into the pit 3 along with a supporting wire 7. Backfilling sand B is roller-compacted between the material 2 and the wall 5 and in the pit 3, and the sand B outside the pit 3 is roller- pressed. Furthermore, a conductive wire 9 led in the upper end of the pit 3 is connected to the supporting wire 7 through a clamp 8 and set. By this constitution, a galvanic cell is formed between the material 2 and the anode 4, the corrosive current generated on the surface of the material 2 is compensated by the current flowing between the material and anode through the hole 3a of the pit 3, and the material 2 is protected from corrosion.

2. 发明专利

JPH08120970A UNDERGROUND TANK 失效
公开(公告)号：JPH08120970A
公开(公告)日：1996-05-14
申请号：JP25719094
申请日：1994-10-21
申请人： TOKYO GAS CO LTD , SHIMIZU CONSTRUCTION CO LTD
发明人： MINEGISHI KOJI , SAKAMOTO SHUNICHI , MIYANAGA MAKOTO
IPC分类号： E04H7/18
摘要： PURPOSE: To make improvements in the strength and water stoppability of a skeletal body by embedding a waterproof screen consisting of a steel plate or the like in a perpendicular central part over the whole surface of this reinforced concrete construction skeletal body, unifying it with a wall part through a dowel bar, and installing a slip stop material in this unified member. CONSTITUTION: A waterproof screen 14 consisting of a material being high in rigidity such as a steel plate or the like, is embedded in a perpendicular central part over the whole surface of this underground tank skeletal body 13, while it is unified with both inner and outer wall parts 15 and 16 as one body by means of dowel steel bars 17. In addition, plural pieces of slip stop materials 18 projected each are attached tight to both surfaces of the waterproof screen 14, having the shearing force transmitted between the inner wall part 15 and the outer wall part 16. In this constitution, supposing a crack or the like is produced in this outer wall part 16, any ground water is made so as not to be penetrated into the inner wall part 15, and simultaneously the extent of strength in the reinforced concrete skeletal body 13 is well improved. Accordingly, such an underground tank as being high in reliability is thus securable.

3. 发明专利

JPH08120969A UNDERGROUND TANK 失效
公开(公告)号：JPH08120969A
公开(公告)日：1996-05-14
申请号：JP25718994
申请日：1994-10-21
申请人： TOKYO GAS CO LTD , SHIMIZU CONSTRUCTION CO LTD
发明人： NAKANO MASABUMI , SAKAMOTO SHUNICHI , KOUNO YASUNAO
IPC分类号： E04H7/18
摘要： PURPOSE: To provide an underground tank that is excellent in water stoppability. CONSTITUTION: This tank is composed of a reinforced concrete construction skeletal body 11 consisting of a side wall 3 and a bottom block, an adiabator 6 installed in an inner part of the skeletal body, a water stop plate 16 installed in space between the skeletal body 11 and this water stop plate 16 as covering an outer surface of the adiabator 6, and a drainage layer 17 installed in space between the skeletal body 11 and the water stop plate 16. In this constitution, this drainage layer 17 is interconnected to a pumping pit 8 via a drainpipe 18.

4. 发明专利

JPH08120971A UNDERGROUND TANK 失效
公开(公告)号：JPH08120971A
公开(公告)日：1996-05-14
申请号：JP25719194
申请日：1994-10-21
申请人： TOKYO GAS CO LTD , SHIMIZU CONSTRUCTION CO LTD
发明人： MINEGISHI KOJI , SAKAMOTO SHUNICHI , FUJITA MUNEHISA , NAKAMITSU MITSUHIRO , NAKAMURA TOMOKI
IPC分类号： E04H7/18
摘要： PURPOSE: To improve the extent of water stoppability in this underground tank by forming a drainage layer consisting of drain material, in the whole surface of the inside of a reinforced concrete construction skeletal body, while guiding a flow of ground water penetrated from the outside into a pumping pit from the drainage layer, and then draining it out. CONSTITUTION: A drainage layer 13 consisting of drain material is installed in space between both reinforced concrete construction inner and outer wall parts 14 and 15, making up a skeletal body of this underground tank. Then this drainage layer 13 and a pumping pit 17 are connected through a drainpipe 18. Any ground water penetrated from a crack or the like produced in the outer wall part 15 is received by the drainage layer 13, collecting it in this pumping pit 17 from the drainpipe 18, and it is drained out of the pumping pit 17 by a submerged pump. With this constitution, the penetration of the ground water into the underground tank is preventable in a positive manner.

5. 发明专利

JPH03285088A ELECTRIC CORROSION PROTECTION DEVICE 失效
公开(公告)号：JPH03285088A
公开(公告)日：1991-12-16
申请号：JP8433490
申请日：1990-03-30
申请人： TOKYO GAS CO LTD , SHIMIZU CONSTRUCTION CO LTD
发明人： AOKI HIROYUKI , YANO NOBUHIKO , SANO MASAMI , SUGA MAKOTO , UENO MAMORU , NAKAJIMA TAKASHI , SAKAMOTO SHUNICHI , KITA NAOKI , TAKAGI MITSUO , WAGA HIDEETSU , TANAKA YOSHITOSHI
IPC分类号： C23F13/00 , C23F13/06
摘要： PURPOSE:To prevent the leakage of a protective current to auxiliary equipment and to obtain the electric corrosion protection device capable of allowing the current to effectively act on a material to be protected by surrounding the material and an anode opposed to the material with a shield material consisting of an electrical insulating material. CONSTITUTION:A galvanic cell is formed between a side steel sheet 2 to be protected and a galvanic anode 3 in the electric corrosion protection device 1. A corrosive current generated on the surface of the sheet 2 is compensated by the protective current flowing between the sheet and anode through the through-hole 7a of a pit 7 to protect the sheet 2. The protective current flows radially with respect to the anode 3 as a whole, and a part flows in the direction separating from the sheet 2. However, since the flow direction is interrupted by the shield material 4, the current flows toward the sheet 2. Accordingly, even if there is metallic auxiliary equipment 5 electrically connected to the sheet close to the sheet 2, the leakage of the protective current to the equipment 5 is prevented, and high-efficiency corrosion protection is achieved.

6. 发明专利

JPS6256287B2 失效
公开(公告)号：JPS6256287B2
公开(公告)日：1987-11-25
申请号：JP11690481
申请日：1981-07-25
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： UTSUGIDA YOSHIZO , SAKAMOTO SHUNICHI
IPC分类号： E02D1/02

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