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1. 发明专利

JP2001073387A PILE HEAD STRUCTURE 失效
公开(公告)号：JP2001073387A
公开(公告)日：2001-03-21
申请号：JP24810299
申请日：1999-09-02
申请人： SHIMIZU CONSTRUCTION CO LTD , KUBOTA KK
发明人： TAKURA TAKASHI , OTSUKI AKIRA , SATO MASAYOSHI , WAKITA EIJI , MANO HIDEYUKI , IWAMOTO TOSHIYUKI , ARAKAWA NORIYUKI , OKAWA MASAYUKI
IPC分类号： E02D27/12 , E02D27/34
摘要： PROBLEM TO BE SOLVED: To prevent a large bending moment from occurring on a foundation pile by overlapping an upper structure side spherical member having a spherical face along the spherical face of a spherical face member on a foundation side spherical face part provided on the head part of the foundation pile, and having a proper friction resistance between the spherical faces. SOLUTION: The foundation side spherical face member 2 having a projection spherical face 2a is attached to the pile head 1a of the foundation pile 1 embedded in ground 5. The upper part structure side spherical face member 4 having the recess spherical face 4a of curvature along the projection spherical face 2a is arranged on the foundation side spherical face member 2. The proper friction resistance is carried by the contact interface of the projection spherical face 2a and the recess spherical face 4a. Thereby it is rigid connection structure in an intermediate and small-scaled earthquake, and during a large-scaled earthquake, it is the structure having a rotating function while a large bending moment is transmitted. In addition, the safety of the pile head 1a can be secured, the cross sectional force of the foundation pile 1 can be lessened, the foundation pile 1 can have the necessary minimum performance, and construction work is simplified.

2. 发明专利

JP2001064982A PILE FOUNDATION STRUCTURE 失效
公开(公告)号：JP2001064982A
公开(公告)日：2001-03-13
申请号：JP24234399
申请日：1999-08-27
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D27/12 , E02D27/34
摘要： PROBLEM TO BE SOLVED: To surely prevent the damage of a foundation pile at an earthquake by fixing an interposing member comprising an elasto-plastic material to one of a foundation building frame or a foundation pile head part, regulating horizontal mutual displacement to the other, and contacting it so that vertical mutual displacement is allowed. SOLUTION: An interposing member 13 made of a low yield point steel material or the like is fixed to the side of a pile head part 8, and is contacted alone with the inner wall 6a of an insertion hole 6. In the case where horizontal force acts on a structure, compression force acts on part of the interposing member 13 by mutually moving a foundation building frame 3 to a foundation pile 2 in the horizontal direction. In the case where an earthquake is large-scaled and stress occurring in the interposing member 13 is yield stress or more, a part exceeding the yield stress of the interposing member 13 out of inertia force generated on the foundation building frame 3 is enabled not to transmit from the foundation building frame 3 to the foundation pile 2 as push force by allowing the interposing member 13 to be the saturated state of the stress.

3. 发明专利

JP2000178981A PILE FOUNDATION STRUCTURE 失效
公开(公告)号：JP2000178981A
公开(公告)日：2000-06-27
申请号：JP35553498
申请日：1998-12-15
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D27/12 , E02D27/34 , E02D31/08
摘要： PROBLEM TO BE SOLVED: To provide a pile foundation structure obtained by combining a foundation skeleton and a foundation pile, which can prevent damage of the foundation pile without fail at the time of a large earthquake, and can achieve reduction of costs, based on the specifications of the piles and by decreasing the number of piles. SOLUTION: A pile foundation structure 1 is made up of a foundation skeleton 2 and a foundation pile 3 with an elastoplastic material 4 interposed at a coupling portion therebetween. The elastoplasic material 4 is provided at the coupling portion between the foundation skeleton 2 and a foundation pile head portion 7, or between the skeleton 2 and a head peripheral wall 9 of the base pile, and the coupling portion between the base body and the base pile head portion is formed into a coupling hole 5. Further, a steel member is arranged on a wall of the hole, or alternatively, a sliding plate is provided on the bottom surface of the coupling hole, and a steel plate which is in contact with the sliding plate, is arranged on the center of the foundation pile head portion. Thus, even at the time of a large or small earthquake, only a small horizontal displacement is caused in the pile foundation structure, which can prevent damage of the foundation pile without fail. Further, the specifications of the piles and decrease in the number of the piles can lead to reduction of costs.

4. 发明专利

JP2000178955A METHOD AND DEVICE FOR INVESTIGATING UNDERGROUND STRUCTURE 失效
公开(公告)号：JP2000178955A
公开(公告)日：2000-06-27
申请号：JP35676198
申请日：1998-12-15
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： NISHIO SHINYA , BABA KOKICHI , KAZAMA HIROSHI , TAMAOKI KATSUYUKI , KURAMOCHI MITSUGI , KOMATSU YOSHINORI , WAKITA EIJI , MANO HIDEYUKI , TAKEUCHI MASAMI
IPC分类号： E02D1/02 , G01N29/04 , G01V1/40 , G01N29/10
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for simply investigating an underground structure surely while providing the investigating method and the investigating device, by which the soundness of the underground structure can be examined simply and certainly from the outside of the structure in the case of the reuse of the underground structure. SOLUTION: In the investigating method of the underground structure, a method, in which a core boring pit 14A is formed to an underground section 13, elastic waves 17 are oscillated towards the outside 16 from the inside 15 and direct waves 20 and reflected waves 21 are received at intervals 34a in the direction of an axis 19 and examined, is adopted. The investigating device for the underground structure has a casing pipe 14 buried into the ground 13, an oscillator 18 oscillating the elastic waves 17 towards the outside 16 from the inside of the casing pipe 14, and a geophone 22 receiving the direct waves 20 and the reflected waves 21 at intervals 34a in the direction of the axis 19 of the casing pipe 14.

5. 发明专利

JP2000027196A PILE FOOTING AND REINFORCING METHOD THEREOF 失效
公开(公告)号：JP2000027196A
公开(公告)日：2000-01-25
申请号：JP19110298
申请日：1998-07-07
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D5/28 , E02D27/12 , E02D33/00
摘要： PROBLEM TO BE SOLVED: To provide a pile footing of a building capable of executing the inspection of sound efficiency of a pile and the reinforcement of the pile during the period of using the building. SOLUTION: A pile footing is so constituted that the upper end section of a pile placed by passing through a footing slab 2 is opened. By the constitution, the inspection of sound efficiency of the pile and the reinforcement of the pile can be carried out. In the pile footing passing through the footing slab 2 to place and opening the upper end section of the pile footing, an inspection method of the pile footing can simply carry out the inspection of a state of the pile by inserting an investigation equipment from an opening 5 of the upper end of the pile 1. A reinforcing method of the pile footing can increase the strength of the pile 1 by casting reinforced concrete from the opening 5 of the upper end of the pile 1 in the pile footing passing through the footing slab 2 to place and opening the upper end section of the pile footing.

6. 发明专利

JPH11193536A PILE FOUNDATION STRUCTURE AND REBUILDING METHOD OF CONSTRUCTION MAKING USE THEREOF 失效
公开(公告)号：JPH11193536A
公开(公告)日：1999-07-21
申请号：JP49798
申请日：1998-01-05
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D27/12 , E02D27/34 , E04G23/06 , E04H9/02
摘要： PROBLEM TO BE SOLVED: To provide pile foundation structure and a rebuilding method of a construction making use thereof capable of maintaining stress acting on piles to allowable bearing capacity or less to prevent the damage, etc., in the piles when a plurality of kinds of piles are mixedly used in the case a construction is to be rebuilt. SOLUTION: The existing pile remains unchanged in the ground without being removed, a new pile is constructed in the same ground, a foundation section 10 mixedly using the existing pile and new pile is constructed, and a new upper structure is constructed on the foundation section 10. The foundation section 10 mixedly using the existing pile 1 and new pile is equipped with a stress control mechanism 30 between the head of the existing pile 1 having low allowable bearing capacity and a foundation floor board 12, the stress control mechanism 30 can freely move a pair of up and down pistons 32A and 32B provided to a foundation floor board 20 side in a cylinder 31 provided to the existing pile 1 side and equipped with a horizontal rod 37, and the inside thereof is filled with an elasto-plastic body 40.

7. 发明专利

JPS61261527A SIDE WALL STRUCTURE FOR ROUND UNDERGROUND TYPE STRUCTURE 失效
公开(公告)号：JPS61261527A
公开(公告)日：1986-11-19
申请号：JP10338085
申请日：1985-05-15
申请人： NIPPON STEEL CORP , SHIMIZU CONSTRUCTION CO LTD
发明人： HASEGAWA AKIYOSHI , KIYOSAKI KOJI , KINOSHITA MASATAKA , HONMA KOJI , NAKAZAWA SUSUMU , WAKITA EIJI , TAKEUCHI ATSUO , KAWASHIMA YOSHI
IPC分类号： E02D5/20 , E02D5/18 , E02D17/04 , E02D29/00
摘要： PURPOSE:To use a continuous wall as a part of a round underground type structure by a method in which a continuous wall inserted with a core material is constructed, the ground inside the continuous wall is excavated, and concrete for side wall is placed into ring beams set during the excavation. CONSTITUTION:Dowel reinforcing bars 7 are welded to H-steels 2 in advance, and the ground is excavated along a guide ring 4 and the soil is replaced by cement mortar. The H-steels 2 are inserted into the cement mortar to form a continuous wall 1. The ground is then excavated to a given depth while setting ring beams 3 inside, and the dowel reinforcing bars 7 are exposed in order by chipping. Circumferential reinforcing bars 9 and vertical reinforcing bars 10 are then set, and concrete 8 for side wall is placed while embracing the ring beams 3 and the dowel reinforcing bars 7. The sheathing continuous wall can thus be utilized as a part of the base structure, and the thickness of the side wall concrete can be greatly reduced.

8. 发明专利

JP2001193081A PILE FOUNDATION STRUCTURE 失效
公开(公告)号：JP2001193081A
公开(公告)日：2001-07-17
申请号：JP2000004937
申请日：2000-01-13
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D27/12 , E02D27/34
摘要： PROBLEM TO BE SOLVED: To reduce a load transmission from an upper structure to a pile. SOLUTION: The upper part of a steel pipe 13 is embedded in the bottom of a foundation frame body 11 of an upper structure 10 and the lower part is projected into the ground G, and the head 12a of a pile 12 as a lower structure supporting the upper structure is arranged inside the steel pipe. A clearance c is secured between the inside face 13a of the steel pipe and the outside face 12b of the pile head. In this state, the pile head is surrounded by steel pipes. Slide boards 15, 16 to allow a relative horizontal displacement of the pile head face of the pile and the foundation frame body are put therebetween. An elastic body 14 allowing that the upper structure and the pile rotate toward the relatively rising and falling direction is put between the slide board and the pile head face or the foundation frame body.

9. 发明专利

JP2000160559A LANDSLIDE PROTECTION WALL AND CONSTRUCTION METHOD THEREFOR 失效
公开(公告)号：JP2000160559A
公开(公告)日：2000-06-13
申请号：JP33323498
申请日：1998-11-24
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D17/04 , E02D5/20
摘要： PROBLEM TO BE SOLVED: To provide a landslide protection wall and a construction method therefor improved in a cost and a construction period while solving a problem of vibration/noise by forming a slope face-like land slide protection wall by a ground improvement, restraining a construction site to a arrow range, simplifying a work process, and improving workability. SOLUTION: This landslide protection wall 2 is constituted by superposing landslide protection walls 2 by a ground improvement construction method in a multilayer shape on the excavating side, and heat part arrangement of the respective landslide protection walls 2 and the length of the landslide protection walls 2 are set in response to the earth pressure stress distribution of the ground. Then, in the construction method, the landslide protection wall is constructed by superposing landslide protection walls 2 by a ground improvement construction method in a multilayer shape on the excavating side, but after setting head part arrangement of the landslide protection walls 2 by dryly excavating the ground up to the prescribed depth in response to the earth pressure stress distribution of the ground, a ground improvement is started, and then, the landslide protection wall 2 is formed in the prescribed length.

10. 发明专利

JP2000154549A CONSTRUCTION FOR REUSE OF EXISTING FOUNDATION 失效
公开(公告)号：JP2000154549A
公开(公告)日：2000-06-06
申请号：JP33131098
申请日：1998-11-20
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： WAKITA EIJI
IPC分类号： E02D27/12
摘要： PROBLEM TO BE SOLVED: To provide construction method for reuse of existing foundations capable of mixedly-using existing and new piles under conditions of the load higher than a prescribed value not acting on the existing piles and no stress concentration. SOLUTION: An existing foundation consisting of an existing foundation slab 2 and an existing pile 1 are left, through-holes are formed at appropriate positions on the existing foundation slab 2 for construction of new piles 4, and a new foundation slab 7 is formed on the new piles 4. A slip layer 5 and an elastic body 6 are disposed between the existing foundation slab 2 and the new foundation slab 7. An existing ground wall 3 and the existing foundation slab 2 serve as alternative earth retaining, therefore the construction of new earth retaining is unnecessary in the execution of work. The number of the new piles 4 can be reduced because the existing piles 1 and new piles 4 are used mixedly, and the slip layer 5 and the elastic body 6 can prevent the application of horizontal force to the existing piles 1 if an earthquake occurs, thus it is possible to ensure safe design.

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