Steel box girder moving temperature measuring device in incremental launching construction process based on solar radiation

Abstract

The utility model discloses a movable temperature measuring device for a steel box girder in an incremental launching construction process based on solar radiation, which relates to the technical field of bridge temperature detection in the construction process and comprises a bridge pier, a pair of transverse copper frames are arranged above the bridge pier, and a plurality of first cross beams are fixedly connected in the transverse copper frames. A plurality of first placing rods are fixedly connected into the transverse copper frame, first sensor placing grooves are formed in the surfaces of the first placing rods, a plurality of first sensors are fixedly connected into the first sensor placing grooves, the intersection included angle between the first cross beam and the first sensor placing grooves is 90 degrees, and a pair of supports is fixedly connected to the top of the bridge pier; the transverse copper frame is fixedly connected to the bearing, and the two sides of the surface of the transverse copper frame are fixedly connected with a plurality of first pulleys, so that the technical problems that when a surface-mounted temperature sensor is adopted for bridge temperature measurement, a beam section measured by the method is very single and fixed, and the transverse and longitudinal bridge direction temperature gradient observation effect cannot be achieved on any beam section are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge temperature detection during construction, in particular to a mobile temperature measuring device for steel box girders during top-pushing construction under sunlight radiation. Background Art

[0002] In recent years, steel box girders have been widely used in the construction of large-span bridges at home and abroad. The reason why this application is so common is that the steel box girder has a light weight and a very flexible construction process. However, compared with concrete materials, the thermal conductivity of steel structures is higher and the specific heat capacity is smaller. This makes the steel box girder more sensitive to external temperature changes, especially under solar radiation conditions. In addition, due to the complexity of the steel box girder structure, under the environment of solar radiation, the temperature of the transverse and longitudinal steel box girder sections will show a complex nonlinear distribution, which will have a greater impact on the deformation and internal force of the steel box girder.

[0003] Under the influence of external factors such as solar radiation, the temperature of different positions of the steel box girder varies unevenly, thus forming a nonlinear temperature gradient. This gradient distribution is not only manifested in the longitudinal direction of the bridge, but also increases with the increase of the width and length of the bridge. This temperature gradient leads to the generation of temperature stress, which in turn causes effects such as uneven cross-sectional stress distribution and local bending.

[0004] For example, when the bridge is constructed by jacking, due to sunlight and the relationship between the sunlight angle and the direction of the bridge jacking construction, there is a temperature difference between the left and right webs of the steel box girder where the concrete bridge deck has not yet been laid, resulting in a transverse temperature difference, which causes the steel box girder to undergo lateral bending deformation, affecting the safety of the jacking construction.

[0005] Normally, the temperature measurement method used for bridge temperature measurement is surface-mounted temperature sensors. The beam sections measured by this method are very single and fixed, and it is impossible to observe the temperature gradient in the horizontal and longitudinal directions of any beam section. It is also impossible to realize temperature detection of different sections during the jacking construction process. At the same time, the operation is complicated and very labor-intensive.

[0006] Therefore, a device and method can be designed to measure the temperature of the steel box girder section at any time and observe the transverse and longitudinal temperature gradients of the steel box girder in real time during the bridge jacking construction process. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation, which solves the problem that when a surface-mounted temperature sensor is used for bridge temperature measurement, the beam section measured by this method is very single and fixed, and it is impossible to achieve the effect of observing the temperature gradient in the horizontal and vertical directions of the bridge for any beam section.

[0008] To achieve the above-mentioned purpose, the utility model proposes a mobile temperature measuring device for steel box girders during jacking construction under solar radiation, including a bridge pier, a pair of horizontal copper frames are arranged above the bridge pier, a plurality of first horizontal beams are fixedly connected inside the horizontal copper frames, a plurality of first placement rods are fixedly connected inside the horizontal copper frames, a first sensor placement groove is opened on the surface of the first placement rod, a plurality of first sensors are fixedly connected inside the first sensor placement groove, and the angle between the first horizontal beam and the first sensor placement groove is ninety degrees.

[0009] Preferably, a pair of supports are fixedly connected to the top of the pier, and the horizontal copper frame is fixedly connected to the supports.

[0010] Preferably, a plurality of first pulleys are fixedly connected to both sides of the surface of the horizontal copper frame, and a slot plate is fixedly connected to both sides of the surface of the horizontal copper frame. The angle between the connecting line of the first pulley on the same side and the extension line of the slot plate is ninety degrees, and the connecting line of the first pulley on the same side is arranged parallel to the first beam.

[0011] Preferably, a pair of vertical copper frames are arranged above the bridge piers, a plurality of second cross beams are fixedly connected inside the vertical copper frames, a plurality of second placement rods are fixedly connected inside the vertical copper frames, a second sensor placement groove is opened inside the second placement rod, a plurality of second sensors are arranged inside the second sensor placement groove, and card slots are opened on both sides of the vertical copper frames.

[0012] Preferably, a pair of the vertical copper frames are arranged between a pair of horizontal copper frames, the slot plates are plugged into the card slots, and a plurality of second pulleys are fixedly connected to the side walls of the vertical copper frames.

[0013] Preferably, nuts are threadedly connected on both sides of the horizontal copper frame, and the nuts are used to fix the connection between the vertical copper frame and the horizontal copper frame.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Real-time performance. Configure sensors, data receivers and computers; the sensors have the characteristics of real-time performance and can measure temperature in real time, transmit the data of several sensors to the data collector, and then transmit the overall data to the computer, process it through the computer processor, and derive the temperature observation cloud map of the steel box girder.

[0016] 2. Reusability. Since the interior of the device is a rectangular cabin, fixed pulleys are evenly distributed on all surfaces of the cabin, and the entire device is fixed to the side of the bridge pier by means of a support, and the inner bottom surface of the rectangular cabin and the jacking platform are kept in the same plane to ensure the normal operation of the jacking construction; when the jacking construction is in progress, the guide beam and the steel box beam pass through the rectangular cabin at a uniform speed to achieve the reuse of the temperature measuring device; that is, several sensors can be reused to observe the steel box beam section passing at a uniform speed at any time.

[0017] 3. Easy to operate and saves manpower. Just fix this device on the side of each pier to measure the temperature of the steel box girder in real time, and measure the temperature of different beam sections as the bridge is pushed. Compared with the previous method of measuring the temperature of a specific beam section by attaching a strain gauge, it greatly saves manpower and improves efficiency.

[0018] 4. Multi-section temperature measurement. Three rows of sensors are respectively arranged on the two upper and lower surfaces and the two bottom surfaces of the rectangular cabin, which can measure the temperature of the three sections of the passing steel box girder at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the vertical copper frame structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the horizontal copper frame structure of the utility model.

[0022] In the figure: 1, bridge pier; 2, support; 3, horizontal copper frame; 31, nut; 32, slot plate; 33, first crossbeam; 34, first placement rod; 35, first sensor placement slot; 36, first sensor; 37, first pulley; 4, vertical copper frame; 41, second crossbeam; 42, second placement rod; 43, second sensor placement slot; 44, second sensor; 45, slot; 46, second pulley. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-3As shown, a mobile temperature measuring device for steel box girders during jacking construction under solar radiation comprises a pier 1, a pair of horizontal copper frames 3 are arranged above the pier 1, a plurality of first cross beams 33 are fixedly connected inside the horizontal copper frames 3, a plurality of first placement rods 34 are fixedly connected inside the horizontal copper frames 3, a first sensor placement groove 35 is provided on the surface of the first placement rod 34, a plurality of first sensors 36 are fixedly connected inside the first sensor placement groove 35, the device is configured with sensors, data receivers and computers as a whole, the sensors have the characteristics of real-time performance, can measure temperature in real time, transmit data from several sensors to a data collector, and then transmit the overall data to a computer, and process the data through a computer processor to derive a temperature observation cloud map of the steel box girder, the angle between the first cross beam 33 and the first sensor placement groove 35 is ninety degrees.

[0025] A pair of supports 2 are fixedly connected to the top of the pier 1 , and a transverse copper frame 3 is fixedly connected to the supports 2 .

[0026] A plurality of first pulleys 37 are fixedly connected to both sides of the surface of the horizontal copper frame 3, and a slot plate 32 is fixedly connected to both sides of the surface of the horizontal copper frame 3. The angle between the connecting line of the first pulley 37 on the same side and the extension line of the slot plate 32 is ninety degrees, and the connecting line of the first pulley 37 on the same side is arranged parallel to the first crossbeam 33.

[0027] The interior of the device is a rectangular cabin with fixed pulleys evenly distributed on all surfaces of the cabin. The entire device is then fixed to the side of the pier 1 using a support 2, and the inner bottom surface of the rectangular cabin and the jacking platform are kept in the same plane to ensure the normal operation of the jacking construction. When the jacking construction is in progress, the guide beam and the steel box beam pass through the rectangular cabin at a uniform speed to achieve the reuse of the temperature measuring device; that is, several sensors can be reused to observe the steel box beam section passing at a uniform speed at any time.

[0028] A pair of vertical copper frames 4 are arranged above the pier 1, and a plurality of second cross beams 41 are fixedly connected inside the vertical copper frames 4. A plurality of second placement rods 42 are fixedly connected inside the vertical copper frames 4, and a second sensor placement groove 43 is provided inside the second placement rod 42. A plurality of second sensors 44 are provided inside the second sensor placement groove 43. Card slots 45 are provided on both sides of the vertical copper frames 4.

[0029] A pair of vertical copper frames 4 is arranged between a pair of horizontal copper frames 3 , the slot plate 32 is inserted into the card slot 45 , and a plurality of second pulleys 46 are fixedly connected to the side walls of the vertical copper frames 4 .

[0030] This device can measure the temperature of the steel box girder in real time by simply fixing it on the side of each bridge pier 1, and can measure the temperature of different beam sections as the bridge is pushed. Compared with the previous method of measuring the temperature of a specific beam section by attaching a strain gauge, it greatly saves manpower and improves efficiency.

[0031] Both sides of the horizontal copper frame 3 are threadedly connected with nuts 31 , and the nuts 31 are used to fix the connection between the vertical copper frame 4 and the horizontal copper frame 3 .

[0032] Working principle: fixed pulleys are evenly distributed on all surfaces of the cabin, and the entire device is fixed to the side of the pier 1 by means of the support 2, and the inner bottom surface of the rectangular cabin and the jacking platform are kept in the same plane to ensure the normal operation of the jacking construction; when the jacking construction is in progress, the guide beam and the steel box beam pass through the rectangular cabin at a uniform speed to realize the reuse of the temperature measuring device; that is, several sensors can be reused to observe the steel box beam section passing at a uniform speed at any time.

[0033] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation, characterized in that: The invention comprises a bridge pier (1), wherein a pair of transverse copper frames (3) are arranged above the bridge pier (1), a plurality of first transverse beams (33) are fixedly connected inside the transverse copper frames (3), a plurality of first placement rods (34) are fixedly connected inside the transverse copper frames (3), a first sensor placement groove (35) is provided on the surface of the first placement rod (34), a plurality of first sensors (36) are fixedly connected inside the first sensor placement groove (35), and an angle between the first transverse beam (33) and the first sensor placement groove (35) is ninety degrees.

2. According to claim 1, a mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation is characterized in that: A pair of supports (2) are fixedly connected to the top of the bridge pier (1), and the horizontal copper frame (3) is fixedly connected to the supports (2).

3. According to claim 1, a mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation is characterized in that: A plurality of first pulleys (37) are fixedly connected to both sides of the surface of the horizontal copper frame (3), and a slot plate (32) is fixedly connected to both sides of the surface of the horizontal copper frame (3). The angle between the connecting line of the first pulley (37) on the same side and the extension line of the slot plate (32) is ninety degrees, and the connecting line of the first pulley (37) on the same side is arranged in parallel with the first crossbeam (33).

4. According to claim 3, a mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation is characterized in that: A pair of vertical copper frames (4) are arranged above the bridge pier (1), a plurality of second cross beams (41) are fixedly connected inside the vertical copper frames (4), a plurality of second placement rods (42) are fixedly connected inside the vertical copper frames (4), a second sensor placement groove (43) is provided inside the second placement rod (42), a plurality of second sensors (44) are provided inside the second sensor placement groove (43), and a card slot (45) is provided on both sides of the vertical copper frames (4).

5. The mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation according to claim 4 is characterized in that: A pair of the vertical copper frames (4) are arranged between a pair of the horizontal copper frames (3), the slot plate (32) is inserted into the card slot (45), and a plurality of second pulleys (46) are fixedly connected to the side walls of the vertical copper frames (4).

6. The mobile temperature measuring device for steel box beams during top-pushing construction under sunlight radiation according to claim 4 is characterized in that: Both sides of the horizontal copper frame (3) are threadedly connected with nuts (31), and the nuts (31) are used to fix the connection between the vertical copper frame (4) and the horizontal copper frame (3).

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