Arch bridge owner encircles continuous displacement monitoring devices
阅读说明：本技术 一种拱桥主拱连续位移监测装置 (Arch bridge owner encircles continuous displacement monitoring devices ) 是由 赵德才 彭浩 郑雪玉 郭法旺 蒋剑 于 2020-06-04 设计创作，主要内容包括：本发明提供了一种拱桥主拱连续位移监测装置,包括拱结构；在所述拱结构的底部有保护管沿拱结构固定,保护管中套有位移计,位移计为阵列式位移计,位移计的总长度不小于拱结构的1.01倍。本发明不受观测误差、外部环境等因素影响,测值精度高；测点密,测值连续性好,可反映结构整体位移情况；可实现对水平向和竖直向的变形自动化监测功能,满足实时监控需求；现场安装便捷,投入使用后,1名技术员即可完成现场监测工作,可节约3～5人,工作效率大幅提高,而且,具有可拆卸重复使用、维护简单优点,推广应用价值高。(The invention provides a device for monitoring continuous displacement of a main arch of an arch bridge, which comprises an arch structure; the bottom of the arch structure is provided with a protection pipe fixed along the arch structure, a displacement meter is sleeved in the protection pipe and is an array type displacement meter, and the total length of the displacement meter is not less than 1.01 times of that of the arch structure. The invention is not influenced by factors such as observation errors, external environment and the like, and has high measurement value precision; the measuring points are dense, the continuity of the measured value is good, and the integral displacement condition of the structure can be reflected; the automatic deformation monitoring function in the horizontal direction and the vertical direction can be realized, and the real-time monitoring requirement is met; the on-site installation is convenient, and after the system is put into use, 1 technician can accomplish on-site monitoring work, can practice thrift 3 ~ 5 people, and work efficiency improves by a wide margin, moreover, has can dismantle used repeatedly, maintains simple advantage, and popularization and application is worth highly.)
1. The utility model provides an arch bridge owner encircles continuous displacement monitoring devices, includes arch structure (1), its characterized in that: the bottom of the arch structure (1) is provided with a protection tube (2) fixed along the arch structure (1), a displacement meter (3) is sleeved in the protection tube (2), the displacement meter (3) is an array type displacement meter, and the total length of the displacement meter (3) is not less than 1.01 times of that of the arch structure (1).
2. The arch bridge main arch continuous displacement monitoring device of claim 1, wherein: the inner diameter of the protection tube (2) is at least 1.5mm larger than the outer diameter of the displacement meter (3).
3. The arch bridge main arch continuous displacement monitoring device of claim 1, wherein: in vertical projection, the protective tube (2) coincides with the center line of the arch structure (1).
4. The arch bridge main arch continuous displacement monitoring device of claim 1, wherein: the protection tube (2) is fixed on the arch structure (1) through a plurality of tube hoops, and the tube hoops are spaced by 0.5-1.0 m.
5. The arch bridge main arch continuous displacement monitoring device of claim 1, wherein: and filling glue is filled between the protection tube (2) and the arch structure (1).
6. The arch bridge main arch continuous displacement monitoring device according to claim 5, wherein: the filling adhesive is polyurethane adhesive, epoxy resin adhesive or silicone adhesive.
7. The arch bridge main arch continuous displacement monitoring device of claim 1, wherein: the arch structure (1) comprises a main arch of an arch bridge and a steel arch center in the arch bridge construction process.
8. The arch bridge main arch continuous displacement monitoring device of claim 1, wherein: when the protection tube (2) and the displacement meter (3) are installed, the displacement meter (3) is firstly sleeved into the protection tube (2), then a lifting hook is installed on the arch structure (1), the protection tube (2) is placed on the lifting hook, then the protection tube (2) is fixed and tightly attached to the arch structure (1) through a tube hoop, and then the lifting hook is detached.
9. The arch bridge main arch continuous displacement monitoring device of claim 8, wherein: the hook interval on the arch structure (1) is 10 m.
Technical Field
The invention relates to a device for monitoring continuous displacement of a main arch of an arch bridge.
Background
In the construction and operation stage of the arch bridge, whether the displacement of the main arch is within a reasonable range is an important parameter for judging the safety of the bridge structure, so that long-term monitoring is required. In addition, for the arch bridge cast-in-place by adopting the suspension splicing steel arch, the displacement of the steel arch is also a project needing important monitoring in the construction period.
One of the greatest advantages of arch bridges is their large spanning capacity, and so arch bridges are often constructed to span mountainous canyons or rivers, resulting in the common inability to place fixed monitoring points under the bridge. In order to obtain the displacement of the main arch, an observation reference point is generally set in a relatively stable place found in a certain range of the arch bridge, prisms are arranged on typical sections such as arch feet, L/8, L/4, 3L/8, L/2, 5L/8, 3L/4, 7L/8 and the like on both banks, and the displacement of each segment is measured by using a total station and adopting an intersection method or a polar coordinate method. The deflection condition of the main arch is reflected by the displacement of the main arch in the vertical direction, and the method is very key for guiding pouring in the construction period and controlling the line shape of the final whole bridge. In addition, a climbing process exists in the construction of the main arch, and the arrangement and observation of monitoring points are difficult. Many attempts have been made by engineers over the years, but most still use the above method.
An arch bridge deflection measuring device (patent number CN101285729A) developed by Tianjin university research team, wherein the technology is characterized in that steel pipe arches which are consistent with the main arch line shape and work independently are fixed on lands or river banks at two ends of an arch bridge, so that the influence on deflection measurement caused by bridge pier settlement is avoided; and then a displacement meter supported on the top surface of the beam structure is connected with the bottom surface of the main arch, and the reading is directly carried out on the river bank through an external measuring and reading instrument. Therefore, compared with a method adopting a total station for observation, the method can avoid the influence of artificial observation errors and weather changes, improve the working efficiency and the observation precision, and reduce the cost of manpower, time and the like. However, the method needs to arrange the steel pipe arch which works independently, is difficult to construct, high in cost and difficult to popularize and apply, is still single-point measurement, and is poor in continuity due to the fact that the distance between measuring points is large. In addition, the technology is mainly used for bridge health monitoring and detection service in the operation stage after the main arch is formed, and cannot be applied in the construction stage.
Disclosure of Invention
In order to solve the technical problems, the invention provides an arch bridge main arch continuous displacement monitoring device, which acquires the main arch continuous displacement by arranging an array type displacement meter monitoring system along the bottom surface of the main arch, so that the integral line shape of the main arch continuous displacement monitoring device can be mastered, and the purpose of automatically monitoring the main arch deflection and the horizontal displacement in the whole life cycle is realized.
The invention is realized by the following technical scheme.
The invention provides a device for monitoring continuous displacement of a main arch of an arch bridge, which comprises an arch structure; the bottom of the arch structure is provided with a protection pipe fixed along the arch structure, a displacement meter is sleeved in the protection pipe and is an array type displacement meter, and the total length of the displacement meter is not less than 1.01 times of that of the arch structure.
The inner diameter of the protection tube is at least 1.5mm larger than the outer diameter of the displacement meter.
In a vertical projection, the protective tube coincides with the center line of the arch structure.
The protection tube is fixed on the arch structure through a plurality of tube hoops, and the tube hoops are spaced by 0.5-1.0 m.
And filling glue is filled between the protection tube and the arch structure.
The filling adhesive is polyurethane adhesive, epoxy resin adhesive or silicone adhesive.
The arch structure comprises a main arch of the arch bridge and a steel arch center in the arch bridge construction process.
When the protection tube and the displacement meter are installed, the displacement meter is firstly sleeved into the protection tube, then a lifting hook is installed on the arch structure, the protection tube is placed on the lifting hook, then the protection tube is fixed and tightly attached to the arch structure through a tube hoop, and then the lifting hook is detached.
The hooks on the arch structure are spaced 10m apart.
The invention has the beneficial effects that: the device is not influenced by factors such as observation errors and external environments, and the measurement precision is high; the measuring points are dense, the continuity of the measured value is good, and the integral displacement condition of the structure can be reflected; the automatic deformation monitoring function in the horizontal direction and the vertical direction can be realized, and the real-time monitoring requirement is met; the on-site installation is convenient, and after the system is put into use, 1 technician can accomplish on-site monitoring work, can practice thrift 3 ~ 5 people, and work efficiency improves by a wide margin, moreover, has can dismantle used repeatedly, maintains simple advantage, and popularization and application is worth highly.
Drawings
FIG. 1 is a schematic view of the installation of the present invention;
fig. 2 is a partial bottom schematic view of fig. 1.
In the figure: 1-arch structure, 2-protection tube, 3-displacement meter.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The device for monitoring the continuous displacement of the main arch of the arch bridge as shown in figures 1 and 2 comprises an
The inner diameter of the protection tube 2 is at least 1.5mm larger than the outer diameter of the
In a vertical projection, the protective tube 2 coincides with the center line of the
The protection tube 2 is fixed on the
And filling glue is filled between the protection tube 2 and the
The filling adhesive is polyurethane adhesive, epoxy resin adhesive or silicone adhesive.
The
When the protection tube 2 and the
The hook spacing on the
In general, the invention is implemented by firstly determining the total length and the measuring point spacing of the array
For the arch bridge cast-in-place by adopting the suspended assembly steel arch, after the construction period is finished and before the steel arch is dismantled, the array displacement meter is firstly dismantled, and then the array displacement meter is installed on the main arch concrete according to the method after the steel arch is dismantled, so that the main arch displacement is monitored.
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