阅读说明：本技术 预埋装配式伸缩缝超长安装悬吊调平定位系统及施工方法 (Embedded assembly type expansion joint overlength installation suspension leveling positioning system and construction method ) 是由 欧永迁 高晨 *** 王舒哲 王�锋 肖礼鹏 彭建锋 黎平 张曼 高悦 陈鹏飞 于 2019-11-29 设计创作，主要内容包括：本发明涉及预埋装配式伸缩缝超长安装悬吊调平定位系统及施工方法,悬吊调平定位系统结构为型钢主梁两端分别固定在两个基座上；每个基座上设置三个水平脚轮；型钢主梁中部设置两条不连通的镂空滑槽,每个滑槽内安装两根手柄悬杆,每个手柄悬杆下端设置一个悬吊螺母,悬吊螺母与伸缩缝预埋组件连接；水平脚轮以混凝土梁为支点。悬吊调平定位系统按照间距沿桥梁横向跨缝设于伸缩缝预埋组件上方,通过手柄悬杆与固定在伸缩缝预埋组件内侧的悬杆螺母连接,通过手柄悬杆和水平脚轮精准调整伸缩缝预埋组件的高程、平顺度及横坡；混凝土浇筑完成并至混凝土初凝后解除,完成预埋组件高精度安装。为超长预埋组件整体精准安装创造条件,确保伸缩缝安装质量。(The invention relates to a pre-embedded assembled expansion joint overlength installation suspension leveling positioning system and a construction method, wherein the suspension leveling positioning system is structurally characterized in that two ends of a section steel main beam are respectively fixed on two bases; three horizontal casters are arranged on each base; the middle part of the section steel main beam is provided with two hollow chutes which are not communicated, two handle suspension rods are arranged in each chute, the lower end of each handle suspension rod is provided with a suspension nut, and the suspension nuts are connected with the expansion joint embedded assembly; the horizontal caster takes the concrete beam as a pivot. The suspension leveling positioning system is arranged above the expansion joint embedded component along the transverse bridge span joint at intervals, is connected with a suspension rod nut fixed on the inner side of the expansion joint embedded component through a handle suspension rod, and accurately adjusts the elevation, the smoothness and the cross slope of the expansion joint embedded component through the handle suspension rod and a horizontal caster; and (5) after the concrete is poured and the initial setting of the concrete is completed, removing the concrete, and completing the high-precision installation of the embedded assembly. The condition is created for the whole accurate installation of overlength embedded component, ensures expansion joint installation quality.)

1. Leveling positioning system is suspended in midair in overlength installation of pre-buried assembled expansion joint, including shaped steel girder, four handle suspension rods, six horizontal truckles, two bases, suspension rod nut, its characterized in that: two ends of the section steel main beam are respectively fixed on the two bases; three horizontal casters are arranged on each base; the middle part of the section steel main beam is provided with two hollow chutes which are not communicated, two handle suspension rods are arranged in each chute, the lower end of each handle suspension rod is provided with a suspension nut, and the suspension nuts are connected with the expansion joint embedded assembly; each horizontal caster takes the concrete beam as a pivot.

2. The system of claim 1, wherein the system comprises: the distance between the two hollow chutes is 10 cm.

3. The overlength installation of pre-buried assembled expansion joint suspends leveling positioning system in midair of claim 1 or 2 characterized in that: the section steel main beam is made of channel steel and is 1.5m in length.

4. The overlength installation of pre-buried assembled expansion joint suspends leveling positioning system in midair of claim 1 or 2 characterized in that: the handle suspension rod is a handle bolt.

5. The overlength installation of pre-buried assembled expansion joint suspends leveling positioning system in midair of claim 1 or 2 characterized in that: the base is made of a steel plate.

6. The construction method for installing, suspending, leveling and positioning system by using the ultra-long embedded assembly type expansion joint of claim 1 is characterized by comprising the following steps:

firstly, installation of an expansion joint embedded assembly: integrally hoisting the expansion joint embedded component to an expansion joint installation notch, checking the plane position of the expansion joint embedded component, and symmetrically fixing two suspension rod nuts every 2m along the inner side of the expansion joint embedded component;

secondly, installing a suspension leveling positioning system: arranging the suspension leveling and positioning system above the expansion joint embedded assembly along the transverse bridge span joint at intervals of 2m, aligning the suspension leveling and positioning system with a suspension rod nut fixed on the expansion joint embedded assembly, and connecting a handle suspension rod with the suspension rod nut fixed on the inner side of the expansion joint embedded assembly to enable the suspension leveling and positioning system and the expansion joint embedded assembly to form a whole; adjusting the elevation of the expansion joint embedded assembly through rotation of the handle suspension rod, adjusting the smoothness and the cross slope of the expansion joint embedded assembly through movement of the horizontal caster wheel on the concrete beam, and rechecking the elevation and the smoothness of the expansion joint embedded assembly for the second time to ensure that the installation error of the expansion joint embedded assembly is less than or equal to 2 mm;

thirdly, pouring concrete: c50 steel fiber concrete is poured into the box girder to reserve the slot opening of the expansion joint, the concrete is poured, and a 30-type vibrating rod is used for vibrating and compacting the concrete; after concrete pouring is finished, finishing surface light collection, covering with a plastic film, and arranging warning signs around a manhole to avoid trampling by personnel;

and fourthly, releasing the suspension leveling positioning system: and after the concrete is initially set, rotating the handle suspension rod, and removing the connection between the suspension leveling positioning system and the expansion joint embedded assembly to complete the positioning and installation of the expansion joint embedded assembly.

The technical field is as follows:

the invention relates to the field of bridge engineering, in particular to an overlength installation, suspension, leveling and positioning system for a pre-embedded assembly type expansion joint and a construction method.

Background art:

at present, the prestressed cast-in-place box girder expansion joint is constructed by adopting a 'rear embedding method', namely, when a concrete box girder main body structure is constructed, an expansion joint notch is reserved at the end of each box girder, secondary reverse cutting is carried out after asphalt paving of a bridge deck is finished, and the installation height and the smoothness of the expansion joint can be adjusted according to the asphalt finishing surface when the expansion joint is installed. The installation process can overcome the defects of long construction period, multiple temporary measures, resource waste and the like of the traditional 'rear embedding method', but the preposition of the embedded assembly has high requirement on the installation precision and great overlength installation and leveling difficulty.

Disclosure of Invention

The invention aims to solve the problems of high precision requirement and high positioning and adjusting difficulty of ultra-long installation of an embedded assembly type expansion joint, meet the high quality requirement of expansion joint installation, and provide a suspension leveling and positioning system and a construction method for high precision leveling and fixing of the embedded assembly of the ultra-long assembly type expansion joint. The embedded component of expansion joint is fixed in the girder below through the handle polished rod, and the embedded component elevation of its handle polished rod accessible rotation adjustment and position, the whole accurate location of the embedded component of overlength of being convenient for, the installation is firm, non-deformable, satisfies embedded component installation high accuracy requirement, improves smooth-going degree and the durability of expansion joint installation.

The technical scheme adopted by the invention for solving the technical problem is as follows:

leveling positioning system is suspended in midair in overlength installation of pre-buried assembled expansion joint, including shaped steel girder, four handle suspension rods, six horizontal truckles, two bases, suspension rod nut, its characterized in that: two ends of the section steel main beam are respectively fixed on the two bases; three horizontal casters are arranged on each base; the middle part of the section steel main beam is provided with two hollow chutes which are not communicated, two handle suspension rods are arranged in each chute, the lower end of each handle suspension rod is provided with a suspension nut, and the suspension nuts are connected with the expansion joint embedded assembly; each horizontal caster takes the concrete beam as a pivot.

The distance between the two hollow chutes is 10 cm.

The section steel main beam is made of channel steel and is 1.5m in length.

The handle suspension rod is a handle bolt.

The base is made of a steel plate.

When the expansion joint pre-embedded component is used, a plurality of suspension leveling positioning systems can be adopted at the same time, each suspension leveling positioning system is arranged above the expansion joint pre-embedded component along the transverse span of the bridge at a certain interval, the suspension leveling positioning systems are connected with suspension rod nuts fixed on the inner side of the expansion joint pre-embedded component through handle suspension rods, the elevation of the expansion joint pre-embedded component is adjusted through rotation of the handle suspension rods, and the smoothness and the transverse slope of the expansion joint pre-embedded component are adjusted through horizontal trundles fixed at two ends of a section steel main beam.

The construction method for installing, suspending, leveling and positioning system by using the ultra-long embedded assembly type expansion joint of claim 1 is characterized by comprising the following steps:

firstly, installation of an expansion joint embedded assembly: integrally hoisting the expansion joint embedded component to an expansion joint installation notch, checking the plane position of the expansion joint embedded component, and symmetrically fixing two suspension rod nuts every 2m along the inner side of the expansion joint embedded component;

secondly, installing a suspension leveling positioning system: arranging the suspension leveling and positioning system above the expansion joint embedded assembly along the transverse bridge span joint at intervals of 2m, aligning the suspension leveling and positioning system with a suspension rod nut fixed on the expansion joint embedded assembly, and connecting a handle suspension rod with the suspension rod nut fixed on the inner side of the expansion joint embedded assembly to enable the suspension leveling and positioning system and the expansion joint embedded assembly to form a whole; adjusting the elevation of the expansion joint embedded assembly through rotation of the handle suspension rod, adjusting the smoothness and the cross slope of the expansion joint embedded assembly through movement of the horizontal caster wheel on the concrete beam, and rechecking the elevation and the smoothness of the expansion joint embedded assembly for the second time to ensure that the installation error of the expansion joint embedded assembly is less than or equal to 2 mm;

thirdly, pouring concrete: c50 steel fiber concrete is poured into the box girder to reserve the slot opening of the expansion joint, the concrete is poured, and a 30-type vibrating rod is used for vibrating and compacting the concrete; after concrete pouring is finished, finishing surface light collection, covering with a plastic film, and arranging warning signs around a manhole to avoid trampling by personnel;

and fourthly, releasing the suspension leveling positioning system: and after the concrete is initially set, rotating the handle suspension rod, and removing the connection between the suspension leveling positioning system and the expansion joint embedded assembly to complete the positioning and installation of the expansion joint embedded assembly.

The invention carries out positioning and leveling installation through the suspension embedded assembly, creates conditions for the overall accurate installation of the overlength embedded assembly, realizes that the embedded assembly is convenient to position, firm to install and not easy to deform, meets the requirement of high installation accuracy of the overlength embedded assembly, improves the smoothness and durability of installation of the expansion joint, and ensures the installation quality of the expansion joint.

Description of the drawings:

fig. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic plan view of the present invention.

Reference numerals: the method comprises the following steps of 1-section steel main beam, 2-handle suspension rod, 3-handle bolt, 4-horizontal caster, 5-base, 6-suspension rod nut, 8-expansion joint pre-embedded assembly, 9-pre-embedded U-shaped steel bar and 10-expansion joint positioning bar.

The specific implementation mode is as follows:

the invention is further described with reference to the following figures and specific embodiments.

As shown in fig. 1 and 2, the invention comprises a section steel main beam 1, four handle suspension rods 2, handle bolts 3, six horizontal casters 4, two bases 5 and suspension rod nuts 6, and is characterized in that: two ends of the section steel main beam 1 are respectively fixed on two bases 5 through handle bolts 3; three horizontal casters 4 are arranged on each base 5; two non-communicated hollow chutes are arranged in the middle of the section steel main beam 1, a partition of 10cm is reserved between the two hollow chutes, two handle suspension rods 2 are installed in each chute, a suspension nut 6 is arranged at the lower end of each handle suspension rod 2, and the suspension nut 6 is connected with an expansion joint embedded assembly 8; each horizontal caster 4 is pivoted on a concrete beam 7. The section steel main beam adopts 10# channel steel of Q235A, the length is 1.5M, the handle suspension rod is an M12X 100 handle bolt, the handle bolt is an M12X 60 bolt, and the horizontal caster wheel is a 10# horizontal adjusting wheel; the suspension rod nut is an M12 long hole nut, and the base is made of a Q235 steel plate with the thickness of 2 mm.

The construction method for installing the suspension leveling positioning system by utilizing the super-long embedded assembly type expansion joint is characterized by comprising the following steps of:

1. manufacturing of suspension leveling and positioning system

The section steel girder 1 adopts Q235A's 10# channel-section steel, and length is 1.5M, respectively sets up a screw of M12 at 15cm department apart from 1 both ends edge of section steel girder, sets up 2 fretwork spouts that do not communicate in section steel girder 1 middle part, reserves 10 cm's wall between two fretwork spouts. The base 5 is made into an equilateral triangle with the side length of 15cm by adopting a Q235 steel plate with the thickness of 2mm, the center of the triangle is provided with an M12 screw hole, and three corners of the base 5 are respectively provided with a horizontal caster 4. The steel girder 1 is connected with the base 5 by using M12 handle bolts 3. The handle suspension rod 2 adopts a 10cm long M12 handle screw, and the suspension rod nut 6 adopts a 10cm long M12 nut; the handle suspension rods 2 are arranged in hollow chutes of the section steel main beam 1, and two chutes are arranged on each chute.

2. Installation of expansion joint embedded component

The embedded assembly 8 of pre-buried assembled expansion joint of 9 and expansion joint location muscle 10 processing preparation of pre-buried U shaped steel muscle, expansion joint pre-buried assembly 8 integral hoisting to expansion joint installation notch, check the 8 planar position of expansion joint pre-buried assembly, guarantee that its error is less than or equal to 2 mm. And two suspension rod nuts 6 are symmetrically fixed every 2m along the inner side of the expansion joint embedded component 8.

3. Suspension leveling positioning system installation

Arranging each suspension leveling positioning system above the expansion joint embedded component 8 along the transverse bridge span joint at intervals of 2m, aligning the suspension leveling positioning systems with a suspension rod nut 6 fixed on the expansion joint embedded component, connecting a handle suspension rod 2 with the suspension rod nut 6 fixed on the inner side of the expansion joint embedded component 8, and integrating the suspension leveling positioning systems with the expansion joint embedded component 8; the elevation of the expansion joint embedded assembly 8 is adjusted through rotation of the handle suspension rod 2, the smoothness and the cross slope of the expansion joint embedded assembly 8 are adjusted through movement of the horizontal caster 4 on the concrete beam 7, the elevation and the smoothness of the expansion joint embedded assembly are rechecked for the second time, and the installation error of the expansion joint embedded assembly is ensured to be less than or equal to 2 mm.

4. Pouring of concrete

C50 steel fiber concrete pouring box girder is adopted to reserve an expansion joint notch, concrete is poured in a manual low altitude mode, a 30-type vibrating rod is used for vibrating and compacting the concrete, and the vibrating rod is prevented from touching a suspension leveling positioning system as much as possible in the vibrating process; and after concrete pouring is finished, finishing surface light collection, covering by using a plastic film, and arranging warning signs around the manhole to avoid trampling by personnel.

5. Suspension leveling positioning system release

And after the concrete is initially set, rotating the handle suspension rod 2, and removing the connection between the suspension leveling positioning system and the expansion joint embedded component 8 to complete the positioning and installation of the expansion joint embedded component.