Simple anti-hollowing real-time observation device for cast-in-place continuous beam

Abstract

The utility model provides a simple cast-in-place continuous beam hollowing prevention real-time observation device, and relates to the field of building construction monitoring, the simple cast-in-place continuous beam hollowing prevention real-time observation device comprises a plurality of force sensing resistors with sensing surfaces arranged at the inner side of a pouring template, and the plurality of force sensing resistors are distributed at the upper part of a box beam chamfering template, a manhole bottom template and the like; the force-sensitive resistor is connected with a light-emitting part and a power source in series, the resistance of the force-sensitive resistor is close to infinite when no pressure exists, the resistance is gradually reduced when the force-sensitive resistor is pressed, and the light-emitting part and the power source are arranged on the outer side of a pouring formwork. According to the device, the change of the brightness of the light-emitting part is converted through the force-sensitive resistor, the concrete pouring condition, which cannot be observed, in the formwork such as a chamfering formwork in the formwork can be reflected in real time through the brightness condition of the light-emitting part on site, response can be made in time in the construction process through real-time observation, the trouble of post-treatment is reduced, and the construction efficiency is improved. And meanwhile, the construction quality is also ensured.

Description

Technical Field

[0001] The present application relates to the technical field of building construction monitoring, and in particular to a simple real-time observation device for preventing air bubbles in cast-in-situ continuous beams. Background Art

[0002] With China's rapid economic development, construction across rivers, canyons, and existing structures in complex areas is increasingly being conducted using cast-in-place structures to meet the demands of complex terrain. Currently, during cast-in-place construction, continuous beam segments are complex and large in size, often reaching heights of 4-6 meters. To conserve concrete and reduce deadweight, cast-in-place box beams are often used. However, when pouring concrete within the box beam chamber, concrete cannot be poured directly into the chamfered corners and below the lower formwork of the manholes.

[0003] During construction, concrete is typically vibrated by gravity and vibrated with a vibrating rod. C50 concrete, which has poor fluidity, is typically used for continuous cast-in-place sections. Because it is completely enclosed by formwork, workers cannot directly observe the concrete condition in hard-to-reach areas such as chamfers. This is often judged based on experience, resulting in small areas of hollowing within each section of the 0# block of the cast-in-place box girder. Later repairs result in poor appearance and significantly impact the overall waterproofing of the structure, posing a risk of leaks later on. Utility Model Content

[0004] In order to improve the problem that box beam chamfers and other parts are prone to hollowing due to the fluidity of concrete, the present application provides a simple real-time observation device for preventing hollowing of cast-in-place continuous beams.

[0005] The present application provides a simple cast-in-place continuous beam anti-air drum real-time observation device adopts the following technical solution:

[0006] A simple real-time observation device for preventing hollowing of cast-in-place continuous beams, comprising a plurality of force-sensitive resistors with sensing surfaces arranged on the inner side of a casting template, wherein the plurality of force-sensitive resistors are distributed on the upper part of a box beam chamfer template, the bottom template of a manhole, and the like;

[0007] The force-sensitive resistor is connected in series with a light-emitting component and a power supply. When there is no pressure, the resistance of the force-sensitive resistor is close to infinity, and when it is under pressure, the resistance gradually decreases. The light-emitting component and the power supply are arranged on the outside of the casting template.

[0008] Furthermore, a soft protective layer is provided on the side of the force-sensitive resistor facing away from the casting template, and the soft protective layer completely wraps the force-sensitive resistor and is attached to the casting template.

[0009] Furthermore, a detection hole is opened through the casting template for the force-sensitive resistor sensing surface to pass through, and the soft protective layer covers the detection hole.

[0010] Furthermore, the detection hole is 5cm-10cm away from the edge of the chamfered template or the bottom template of the manhole.

[0011] Furthermore, the distance between two adjacent detection holes on the same side is 50cm-60cm.

[0012] Furthermore, the force-sensitive resistor is a resistive thin film pressure sensor, the detection hole is a strip-shaped hole and its hole length is not less than the maximum width of the force-sensitive resistor.

[0013] Furthermore, a groove is provided on the inner side of the casting template for embedding the sensing surface of the force-sensitive resistor.

[0014] Furthermore, an adhesive layer is provided on the side of the force-sensitive resistor close to or away from the flexible protective layer.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. This device uses an induction circuit to convert the saturation state of concrete pouring and the presence of hollows and other difficult-to-observe conditions during the pouring of large-volume concrete such as continuous beam 0# blocks into changes in the brightness of the light-emitting component through a force-sensitive resistor. The change in the brightness of the light-emitting component directly reflects the presence of hollows inside the formwork.

[0017] 2. This device can reflect the concrete pouring status of the chamfered formwork and other parts that cannot be observed in real time through the brightness of the on-site luminous parts. Through real-time observation, timely response can be made during the construction process, reducing the trouble of subsequent processing and ensuring the construction quality.

[0018] 3. The device is easy to construct and install and disassemble. It can be reused during the construction process. The device is small and easy to carry, does not take up too much volume, and does not affect the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the structure when the embodiment of the present application is set up;

[0021] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 is a circuit diagram of a force-sensitive resistor, a light-emitting element, and a power supply in an embodiment of the present application;

[0023] Figure 4 This is an enlarged schematic diagram of an embodiment of the present application when positioning a force-sensitive resistor by embedding a groove;

[0024] Figure 5 It is an enlarged schematic diagram of the embodiment of the present application when the force-sensitive resistor is positioned by the adhesive layer.

[0025] Figure numerals: 1. casting template; 11. chamfer template; 12. manhole bottom template; 2. force-sensitive resistor; 3. light-emitting component; 4. power supply; 5. soft protective layer; 6. detection hole; 7. embedding groove; 8. adhesive layer. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] Reference Figure 1 、 Figure 2 and Figure 3 The embodiment of the present application discloses a simple real-time observation device for preventing hollowing of cast-in-place continuous beams, which includes multiple force-sensitive resistors 2 with sensing surfaces arranged on the inner side of a casting template 1. Multiple force-sensitive resistors 2 are distributed on the upper part of the box beam chamfer template 11, the bottom template 12 of the manhole, etc.; in other construction projects, the force-sensitive resistors 2 can also be set at locations of the casting template 1 that are prone to hollowing for monitoring.

[0028] The force-sensitive resistor 2 is connected in series with a light-emitting element 3 and a power supply 4. When there is no pressure, the resistance of the force-sensitive resistor 2 is close to infinite, and when pressure is applied, the resistance gradually decreases. The light-emitting element 3 and the power supply 4 are arranged outside the casting form 1. In the specific configuration, the light-emitting element 3 is set as an energy-saving LED light, specifically a small high-brightness blue light, which can be well recognized even in high ambient light during the day. The power supply 4 can be a 4.5V fixed power supply 4, which can use a button battery or three AA or AA batteries.

[0029] In this way, during the construction of the cast-in-place continuous beam block 0#, after the reinforcement is tied and before the interior formwork of the box is installed, a hole is drilled in the casting formwork 1, and multiple force-sensitive resistors 2 are set on the manhole lower formwork and the chamfered formwork 11 on the side of the middle beam, with the sensing surface of the force-sensitive resistor 2 in close contact with the inner side of the casting formwork 1 so that it can make relatively smooth contact with the concrete. During the concrete pouring process, when the poured concrete gradually contacts the casting formwork 1, the pressure on the force-sensitive resistor 2 gradually increases, the resistance value of the force-sensitive resistor 2 gradually decreases, and the brightness of the light-emitting element 3 gradually becomes brighter. When the concrete reaches a completely saturated state, the brightness of the light-emitting element 3 reaches its maximum. By observing the brightness of the light-emitting element 3, the construction workers can infer whether the concrete inside the casting formwork 1 has reached a saturated state; if it has not reached a saturated state, they can make timely adjustments, increase the amount of concrete poured in that area, or adjust the slump of the concrete in time. If necessary, holes can be drilled for additional pouring to ensure that the concrete is poured fully and there is no hollowing. Therefore, through the observation device requested by itself, on-site construction workers can conduct intuitive observation. Its principle is simple, the work is efficient and the energy consumption is low. It is easy for ordinary construction workers to operate and is suitable for promotion.

[0030] In addition, in order to facilitate the repeated use of the observation device of this application, refer to Figure 1 and Figure 3 A flexible protective layer 5 is provided on the side of the force-sensitive resistor 2 facing away from the casting template 1. The flexible protective layer 5 completely encapsulates the force-sensitive resistor 2 and is attached to the casting template 1. A detection hole 6 is provided through the casting template 1 for the sensing surface of the force-sensitive resistor 2 to pass through. The flexible protective layer 5 covers the detection hole 6. More specifically, the force-sensitive resistor 2 is a resistive thin film pressure sensor, comprising a circular or square sensing surface and a tail for connecting circuits. The detection hole 6 is a strip-shaped hole with a hole length not less than the maximum width of the sensing surface of the force-sensitive resistor 2 and a hole width slightly greater than the thickness of the sensing surface of the force-sensitive resistor 2. The flexible protective layer 5 can be a film, oil-proof paper, release paper, or the like.

[0031] In this way, by opening a strip-shaped detection hole 6 on the casting template 1, when installing the present application on the casting template 1, only the sensing surface of the force-sensitive resistor 2 can be passed through the detection hole 6, flipped over and attached to the inner wall of the casting template 1, and tightly attached through the soft protective layer 5. The soft protective layer 5 can provide good protection for the force-sensitive resistor 2 during the casting process, preventing the concrete from directly contacting the sensing surface of the force-sensitive resistor 2 and causing damage to the force-sensitive resistor 2; and when the concrete is formed and the mold is removed, the force-sensitive resistor 2 can be well peeled off for reuse without causing significant damage to the force-sensitive resistor 2. At the same time, since the detection hole 6 is opened as a thin slit-shaped strip hole and the soft protective layer 5 covers it on the inside, there is no need to consider the possibility of concrete leakage after the hole is opened on the casting template 1, making the present application extremely easy to operate in actual application.

[0032] Moreover, the detection hole 6 is 5cm-10cm away from the edge of the chamfered template 11 or the manhole bottom template 12, and the spacing between two adjacent detection holes 6 on the same side is 50cm-60cm, so that the observation operation radius of each light-emitting part 3 is approximately 25cm-30cm, and the area in the casting template 1 that is prone to hollowing can be monitored as comprehensively as possible.

[0033] Furthermore, in order to prevent the sensing surface of the force-sensitive resistor 2 from slipping inside the casting template 1 and affecting the detection effect.

[0034] In one possible embodiment, referring to Figure 4 A embedding groove 7 is provided on the inner side of the casting template 1 for embedding the sensing surface of the force-sensitive resistor 2. The positioning effect of the embedding groove 7 on the sensing surface of the force-sensitive resistor 2 can reduce the possibility of displacement of the force-sensitive resistor 2 to a certain extent.

[0035] In another possible embodiment, referring to Figure 5 An adhesive layer 8 is provided on the side of the force-sensitive resistor 2 close to or away from the soft protective layer 5. When the adhesive layer 8 is provided on the side close to the casting template 1, the force-sensitive resistor 2 can be removed from the template when demolding; when the adhesive layer 8 is provided on the side close to the soft protective layer 5, the adhesive layer 8 can be more conveniently peeled off from the soft protective layer 5 such as film, oil paper or release paper, and the damage to the force-sensitive resistor 2 is less. At the same time, such an adhesive layer 8 can be reused, avoiding damage to the sensing surface of the force-sensitive resistor 2 caused by frequent replacement of the adhesive layer 8.

[0036] The implementation principle of a simple real-time observation device for preventing hollowing of cast-in-situ continuous beams in this embodiment is as follows:

[0037] Before pouring, multiple force-sensitive resistors 2 are installed on the manhole lower formwork and the chamfered formwork 11 on the side of the center beam, with their sensing surfaces in close contact with the inside of the pouring formwork 1, ensuring smooth contact with the concrete. During the concrete pouring process, as the poured concrete gradually contacts the pouring formwork 1, the pressure on the force-sensitive resistors 2 gradually increases, causing their resistance to gradually decrease and the brightness of the light-emitting elements 3 to gradually increase. When the concrete is fully saturated, the light-emitting elements 3 reach maximum brightness.

[0038] By observing the brightness of the luminous element 3, construction workers can infer whether the concrete inside the casting template 1 has reached a saturated state. If it has not reached a saturated state, they can make timely adjustments by increasing the amount of concrete poured in that area or adjusting the slump of the concrete. If necessary, they can also open holes for additional pouring to ensure that the concrete is fully poured and there is no hollowing. Therefore, the observation device itself can facilitate on-site construction workers to conduct intuitive observation. Its principle is simple, the operation is efficient, and the energy consumption is low. It is easy for ordinary construction workers to use and suitable for promotion.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A simple cast-in-situ continuous beam anti-air drum real-time observation device, characterized in that: It includes multiple force-sensitive resistors with sensing surfaces arranged on the inner side of the casting template, and the multiple force-sensitive resistors are distributed on the upper part of the box beam chamfer template, the bottom template of the manhole, etc. The force-sensitive resistor is connected in series with a light-emitting component and a power supply. When there is no pressure, the resistance of the force-sensitive resistor is close to infinity, and when it is under pressure, the resistance gradually decreases. The light-emitting component and the power supply are arranged on the outside of the casting template.

2. A simple cast-in-situ continuous beam anti-air drum real-time observation device according to claim 1, characterized in that: A soft protective layer is provided on the side of the force-sensitive resistor facing away from the casting template. The soft protective layer completely wraps the force-sensitive resistor and is attached to the casting template.

3. A simple cast-in-situ continuous beam anti-air drum real-time observation device according to claim 2, characterized in that: A detection hole for the force-sensitive resistor sensing surface to pass through is opened through the casting template, and the soft protective layer covers the detection hole.

4. A simple cast-in-situ continuous beam anti-air drum real-time observation device according to claim 3, characterized in that: The detection hole is 5 cm to 10 cm away from the edge of the chamfered template or the bottom template of the manhole.

5. The simple cast-in-situ continuous beam anti-air-drum real-time observation device according to claim 3, characterized in that: The distance between two adjacent detection holes on the same side is 50cm-60cm.

6. The simple cast-in-situ continuous beam anti-air bulge real-time observation device according to claim 3, characterized in that: The force-sensitive resistor is a resistive thin film pressure sensor, and the detection hole is a strip-shaped hole whose hole length is not less than the maximum width of the force-sensitive resistor.

7. The simple cast-in-situ continuous beam anti-air bulge real-time observation device according to claim 2, characterized in that: An embedding groove for embedding the sensing surface of the force-sensitive resistor is provided on the inner side of the casting template.

8. The simple cast-in-situ continuous beam anti-air-drum real-time observation device according to claim 2, characterized in that: An adhesive layer is provided on one side of the force-sensitive resistor close to or away from the soft protective layer.

Images