CN-115583587-B - Tire type beam lifting machine wide narrowing type temporary transformation method

CN115583587BCN 115583587 BCN115583587 BCN 115583587BCN-115583587-B

Abstract

The invention discloses a tire type girder lifting machine wide narrowing temporary transformation method which comprises the following steps of controlling a girder lifting machine to lift a plurality of box girders and to be overlapped on a high pedestal, enabling lifting machine heads at two ends of the box girders to move inwards from outside to inside, arranging a first shoveling pad on the outer side of the lifting machine head close to the front end of the box girders, arranging a second shoveling pad on the inner side of the lifting machine head, arranging a jack on the top surface of the second shoveling pad, arranging two groups of bolt hole groups in the middle area of a supporting leg beam close to the front end of a girder of the girder lifting machine, removing bolt connection between the supporting leg beam and the supporting leg, lifting the jack to lift a girder to separate the supporting leg beam from the supporting leg, enabling the separated supporting leg beam to move inwards to be right below the bolt hole groups and to be aligned, controlling the jack to fall back to the supporting leg beam on the supporting leg, and installing bolts at the bolt hole groups to fix the supporting leg beam and the supporting leg. The invention has the advantages of fully utilizing the existing equipment of the beam field, realizing the wide narrow type rapid temporary transformation of the beam lifting machine, along with simple transformation and low investment.

Inventors

CAO ZHENJIE
WANG HAIJIAN
XING RUXIANG
SU BIN
WANG GUANGZHOU
ZHAO YANG
FAN XIANMING
JIA JIANHONG

Assignees

中铁十五局集团有限公司

Dates

Publication Date: 20260512
Application Date: 20221012

Claims (3)

1. The tire type beam lifting machine wide narrowing type temporary transformation method is characterized by comprising the following steps of: The method comprises the following steps of S1, arranging a plurality of high pedestals at a position to be modified, controlling a tire type girder lifting machine to lift a plurality of box girders and sequentially stacking the box girders on the high pedestals from bottom to top; S2, controlling lifting machine heads on the tire type beam lifting machine, which are positioned at two ends of the box beam, to move from outside to inside, arranging a first shoveling pad on the outer side of the lifting machine head, which is close to the front end of the box beam, and arranging a second shoveling pad on the inner side of the lifting machine head, wherein the top surface of the first shoveling pad directly supports the bottom surface of a main beam of the tire type beam lifting machine, and the top surface of the second shoveling pad is provided with a jack and supports the bottom surface of the main beam through the jack; S3, two groups of bolt holes are formed in the middle area of the lower surface of a supporting leg beam of the tire type beam lifting machine, which is close to the front end of a main beam of the tire type beam lifting machine, and the bolt connection between the supporting leg beam and two supporting legs below the supporting leg beam is relieved; s4, lifting the jack on the second shoveling pad upwards to lift the main beam so as to separate the supporting leg cross beam on the lifting side of the main beam from the two supporting legs below; S5, moving the separated two support legs to the inner side to the position right below the bolt hole group formed in the step S3 and aligning the support legs; S6, lifting the jack upwards to enable the main beam to be separated from the support of the first shoveling pad, removing the first shoveling pad, then controlling the jack to fall back to enable the supporting leg cross beam to fall on the two supporting legs, and installing bolts at the two bolt hole groups to fix the supporting leg cross beam and the supporting legs; And S7, finishing the transformation of the supporting leg cross beam and the supporting leg near the rear end of the box girder according to the method of the steps S2-S6.
2. The method for temporarily modifying a wide-type narrowing profile of a tire-type beam-lifting machine according to claim 1, wherein the jack-up height in step S4 is 20cm, and the jack-up height in step S6 is 25cm.
3. The method for temporarily modifying the wide narrowing type of the tire-type beam lifter according to claim 1, wherein after the bolt hole group is formed in the step S3, a guide mechanism pointing to the supporting leg is fixedly arranged on the bolt hole group, the guide mechanism comprises a horizontal steel plate fixed on the bolt hole group and vertical steel plates bent downwards from two side edge parts of the horizontal steel plate, the vertical steel plates extend to the supporting leg parts on the corresponding sides, the vertical steel plates on the two sides form a guide path when the supporting leg moves inwards, and after the supporting leg moves to be positioned below the bolt hole group along the vertical steel plates on the two sides, the horizontal steel plate and the vertical steel plate are removed.

Description

Tire type beam lifting machine wide narrowing type temporary transformation method Technical Field The invention belongs to the technical field of beam lifter equipment, and particularly relates to a wide narrowing type temporary transformation method of a tire type beam lifter. Background The beam lifting machine is a portal crane and is used for lifting the prefabricated box beam. When the widened or weighted section type precast box girder is arranged in the girder field of the precast box girder, the bearing capacity of the girder and the supporting leg cross girder of the tire type girder lifting machine is tested. When the bearing capacity is insufficient, the tire type girder lifting machine cannot finish lifting and carrying of the prefabricated box girder, the main girder of the tire type girder lifting machine is a pure bent girder, the action point of external force is close to a fulcrum, the bending moment is controllable, the supporting leg cross beam of the tire type girder lifting machine is a simply supported girder subjected to concentrated force in the midspan, and the supporting leg cross beam and the supporting leg can be jointly simplified into a steel frame, and the bending moment is larger. Accordingly, there is a need in the art for a temporary retrofitting method when the leg beams of a tire type beam machine have insufficient load carrying capacity. Disclosure of Invention According to the defects of the prior art, the invention provides a tire type girder lifting machine wide narrowing type temporary transformation method, and the temporary transformation method reduces the bending moment of a supporting leg beam by changing the connection position of a movable supporting leg and the supporting leg beam. The invention is realized by the following technical scheme: The tire type beam lifting machine wide narrowing type temporary transformation method is characterized by comprising the following steps of: The method comprises the following steps of S1, arranging a plurality of high pedestals at a position to be modified, controlling a tire type girder lifting machine to lift a plurality of box girders and sequentially stacking the box girders on the high pedestals from bottom to top; S2, controlling lifting machine heads on the tire type beam lifting machine, which are positioned at two ends of the box beam, to move from outside to inside, arranging a first shoveling pad on the outer side of the lifting machine head, which is close to the front end of the box beam, and arranging a second shoveling pad on the inner side of the lifting machine head, wherein the top surface of the first shoveling pad directly supports the bottom surface of a main beam of the tire type beam lifting machine, and the top surface of the second shoveling pad is provided with a jack and supports the bottom surface of the main beam through the jack; S3, two groups of bolt holes are formed in the middle area of the lower surface of a supporting leg beam of the tire type beam lifting machine, which is close to the front end of a main beam of the tire type beam lifting machine, and the bolt connection between the supporting leg beam and two supporting legs below the supporting leg beam is relieved; s4, lifting the jack on the second shoveling pad upwards to lift the main beam so as to separate the supporting leg cross beam on the lifting side of the main beam from the two supporting legs below; S5, moving the separated two support legs to the inner side to the position right below the bolt hole group formed in the step S3 and aligning the support legs; S6, lifting the jack upwards to enable the main beam to be separated from the support of the first shoveling pad, removing the first shoveling pad, then controlling the jack to fall back to enable the supporting leg cross beam to fall on the two supporting legs, and installing bolts at the two bolt hole groups to fix the supporting leg cross beam and the supporting legs; And S7, finishing the transformation of the supporting leg cross beam and the supporting leg near the rear end of the box girder according to the method of the steps S2-S6. And in the step S4, the lifting height of the jack is 20cm, and in the step S6, the lifting height of the jack is 25cm. And after the bolt hole group is formed in the step S3, a guide mechanism pointing to the supporting leg is fixedly arranged on the bolt hole group, the guide mechanism comprises a horizontal steel plate fixed on the bolt hole group and vertical steel plates bent downwards from two side edge parts of the horizontal steel plate, the vertical steel plates extend to the supporting leg parts on the corresponding sides, the vertical steel plates on the two sides form a guide path when the supporting leg moves inwards, and after the supporting leg moves to be positioned below the bolt hole group along the vertical steel plates on the two sides, the horizontal steel plate and the vertical steel plate are removed. The