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1. 发明专利

JPH1037152A UNDER WATER FORM CONSTRUCTION METHOD 失效
公开(公告)号：JPH1037152A
公开(公告)日：1998-02-10
申请号：JP19309296
申请日：1996-07-23
申请人： KAJIMA CORP , OHBAYASHI CORP , HAZAMA GUMI
发明人： TAKAHARA YOSHIYUKI , MAEHARA TERUO , SUZUKI TATSUO , KAKIMI TOSHIKAZU , UCHIMURA SHUJI , OKUMURA SHINJI
IPC分类号： E02B3/06
摘要： PROBLEM TO BE SOLVED: To reduce an amount of concrete and volume of reinforcing bars and reduce the work of a diver by driving a chemical anchor on a revetment which is already constructed in advance, installing a PC plate in the sea to connect its upper and lower parts tightly by a separator and assemble gable end form, and then placing water concrete. SOLUTION: A chemical anchor 11 is placed and fixed on a concrete face of a caisson 3 which is already installed. Next, a lower part fixing device 5 is installed based on the measurement of quaywall normal line. Then, the erection of conducting material timbering support waling is preceded from a caisson in which the installation of the device 5 is completed, and a conducting material timbering and a conducting material 8 are sequeutially installed in this order. The ground assembly and erection of an upper part fixing device 6 are succeedinglydone. Then, a PC plate 1 is put on a pedestal of the lower part fixing device 5 and is fixed. The PC plate 1 and the conducting material 8 of the upper part fixing device 6 are fixed. After that, a separator 4 is fixed at predetermined length, and gable end form is installed in the direction of construction work cross section. Consequently, it is possible to reduce a driver's work, reduce cost, and shorten construction term markedly.

2. 发明专利

JPH10121476A PLACING METHOD OF UNDERWATER CONCRETE AND ITS DEVICE 失效
公开(公告)号：JPH10121476A
公开(公告)日：1998-05-12
申请号：JP28076596
申请日：1996-10-23
申请人： KAJIMA CORP
发明人： MAEHARA TERUO , TAKAHARA YOSHIYUKI
IPC分类号： E02D15/06
摘要： PROBLEM TO BE SOLVED: To provide high quality concrete by restraining separation of a material of concrete to the utmost, preventing occurrence of water contamination and securing safety and economy of construction in the case of directly placing concrete underwater by a concrete pump without using a Ptolemy pipe. SOLUTION: A placing device of underwater concrete places underwater concrete by setting a concrete-conveying pipe 3 underwater and using a concrete pump 2. In this case, the concrete-conveying pipe 3 is made in double-pipe structure by an inner pipe 13 connected to the concrete pump 2 and an outer pipe 14 assembled on a lower end part of the inner pipe 13 free to slide, a bottom cover 15 is provided on a lower end opening of the inner pipe 13, a discharge port of concrete is formed on the side of a lower part, and the discharge port of the inner pipe 13 is closed by the outer pipe 14 free to open and close.

3. 发明专利

JPH08209631A CONSTRUCTION METHOD FOR MULTISPAN CONTINUOUS BRIDGE 失效
公开(公告)号：JPH08209631A
公开(公告)日：1996-08-13
申请号：JP1664195
申请日：1995-02-03
申请人： KAJIMA CORP , CHIYODA CONSULTANT KK
发明人： IJUIN HISAMITSU , TAKAHARA YOSHIYUKI , SAKAI YOSHIHIKO , MURAKAMI TAKESHI
IPC分类号： E01D21/00 , E01D1/00 , E01D2/00 , E01D4/00 , E01D101/24 , E01D101/26
摘要： PURPOSE: To exclude increase of thickness of members and various reinforcement becoming unnecessary in a complete system to the utmost and construct a reasonable and economical multispan continuous bridge by restraining temporary load applied on the bridge pier or the upper structure during construction. CONSTITUTION: In construction of a multispan continuous bridge, the lower part of a bridge pier 1 of a span in which construction of an arch rib 2 is completed and the upper part of a bridge pier 1 of the next span in which construction is succeedingly executed are obliquely connected together with PC steel 3a. An arch center 4 as a movable support is moved to the span in which the arch rib 2 is constructed, and set between the front and rear bridge piers 1. Concrete for forming the arch rib 2 is placed on the arch center 4. The PC steel 3a is tensed and tension of the PC steel 3b of the preceding span in which the arch rib 2 is already formed is released so as to adjust horizontal displacement generated in the bridge pier 1, and the stress condition in a complete system is nearly attained. After curing, the arch center 4 is shifted to the next span, and the PC steel 3c of the span where introduction of tension becomes unnecessary is removed and diverted.

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