JPS62130319A - Temperature measuring instrument for placed concrete - Google Patents

Abstract

PURPOSE:To measure the temperature of the concrete in a sliding form SF efficiently by a small number of temperature sensors by moving a main body provided with plural temperature sensors in the placed concrete in the SF according to the movement of the SF. CONSTITUTION:The SF 2 as a moving form has weir plates 3 and 3 provided opposite each other at a specific interval W1 and those are provided with a frame body 5. The frame body 5 is provided with a rod-shaped body 7 suspended in the concrete 1- placed between plates 3 and 3 through a rod 6 and the main body 7 is provided with plural temperature sensors 9 at an interval L1 in the moving directions A and B of the SF 2. Consequently, the temperature of the concrete 10A is measured by a sensor 9A after placing. Then, the SF 2 moves in the direction A by the distance L1 a specific time later and the temperature of the concrete 10A is measured by a sensor 9B (9C or 9D). Consequently, the integral temperature is operated continuously from the time required by the concrete 10A to move from one sensor 9 to another. The moving speed of the SF 2 is so adjusted that the value is specific temperature, and then the strength of the concrete 10A is sufficient when the concrete 10A is parted from the SF.

Description

Detailed Description of the Invention (a) Industrial Use Minute Hand The present invention is used to determine the demolding strength of concrete in the sliding method in which concrete is poured while continuously moving the formwork. Concerning a pouring concrete temperature measuring device.

(b), Conventional technology Usually, there is a close relationship between the strength development of concrete and the cumulative temperature (Yoshio Kasai, "Method for estimating initial compressive strength of concrete", Architectural Institute of Japan paper report @ No. 141
, November 1962), attempts have been made to use the cumulative temperature in the sliding method to determine whether or not poured concrete has reached demolding strength.

(C) 0 Problems to be solved by the invention However, when concrete is poured at different locations, such as in the sliding method, it is difficult to measure the temperature of the concrete at the locations where it has been poured. However, it requires an extremely large number of temperature sensors, which is not only uneconomical, but also requires a lot of effort to install the temperature sensors. Furthermore, temperature measurement is only required at the concrete inside the sliding form for the purpose of determining the timing of demolding.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a placed concrete temperature measuring device that can efficiently measure the temperature of concrete in a sliding form using only a small number of temperature sensors. be.

(d) Means for solving the zero problem, that is, the present invention has a main body (7), and the main body (7) has a plurality of members arranged at predetermined intervals (Ll) in the direction of movement of the sliding form (2). A temperature sensor (9) is provided on the main body (7), and the main body (7) is attached to a sliding form (2).
) is provided with an installation means (6) that is installed in the poured concrete (10) so as to be movable with the movement of the sliding form (2).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. The following r (el
The same applies to the column ``, action''.

(e) 6 Effects With the above-described configuration, the present invention allows the placed concrete to face each temperature sensor (9) one after another by moving the sliding form (2), and the temperature at that point is measured. It acts so that the cumulative temperature of the concrete part can be calculated.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIGS. 1 and 2 are front views showing an embodiment of a placed concrete temperature measuring device according to the present invention.

As shown in FIG. 1, the sliding form 2, which is a movable formwork, has weir plates 3.3 facing each other at a predetermined interval w1. A frame 5 is provided. A rod-shaped main body 7 is suspended from the frame 5 through a rod 6 constituting the placed concrete temperature measuring device 1 according to the present invention in the concrete 10 placed between the weir plates 3 and 3. , a plurality of temperature sensors 9 are mounted on the main body 7 at regular intervals, and the sliding form 2
, that is, in the directions of arrows A and B. Furthermore, a scaffold 11 is provided above the weir plate 3.3 in the figure.

Since the placed concrete temperature measuring device 1 and the like have the above-described configuration, the sliding form 2 is gradually moved in the direction of the arrow as shown in FIG. 1 when concrete is placed. Then, as shown in FIG. 2, the movement of the sliding form 2 creates a new concrete casting space 12 above the gap between the weir plates 3 and 3, so that concrete is poured into the concrete casting space 12. 10 is poured and cast. In this way, the structure is gradually built in the direction of entry.

Note that as the sliding form 2 moves in the entry direction, the concrete 1° that has been poured solidifies and is removed from the form by separating from the sheathing plate 3 downward in the figure, but the concrete 10 is removed from the weir plate 3. At the time of demolding from Step 3, the concrete needs to have solidified to the extent that it can stand on its own.

As mentioned above, the cumulative temperature is used to judge the strength of the concrete 10 that has been placed. It is necessary to measure the

Here, placed concrete temperature measuring device 1 according to the present invention
When using, for example, the temperature of the concrete 10A in the shaded area in FIG. 1 is measured by the temperature sensor 9A immediately after pouring in FIG.

Next, after the predetermined time T1 has elapsed, the sliding form 2 moves in the incoming direction by a distance L1, and at the same time, the main body 7 also moves in the incoming direction by a distance fiL1 via the frame 5 and the rod 6. Then, the concrete 10A is now exposed to the temperature sensor 9. to face.

Therefore, the temperature sensor 9 measures the concrete temperature (tQ) of 10.
temperature sensor 9A, 9. From the measurement results and the time T1 required to move the distance L1, Conch! J-
Calculate the integrated temperature of the 1-10A portion. In this way, as the sliding form 2 moves in the A direction, the temperature sensors 9°, 9o, 9. Conch IJ-1-1
The sliding form measures the temperature of 0A, continuously calculates the cumulative temperature from the result and the time required for the concrete 10A to move between each temperature sensor 9, and makes the value a predetermined cumulative temperature. Adjust the movement speed of 2. Then, by the time the concrete 10A is demolded from the weir plate 3, and therefore from the sliding form 2, the concrete 10A has reached sufficient strength to be demolded, and demolding is performed smoothly.

Note that the installation interval L1 of the temperature sensors 9 in the placed concrete temperature measuring device 1 does not necessarily have to be constant for each temperature sensor 9, and may vary depending on the positional relationship between the placed concrete 10A and each temperature sensor 9. Of course, they may be provided at any interval as long as they can be specified in accordance with the movement of the sliding form 2.

Further, in the above embodiment, the temperature measuring device 1 is connected to the weir plate 3 by two
Although we have described the case where the sliding form 2 is used with facing plates, it is not necessarily necessary to use two facing plates in the sliding form 2 in which the temperature measuring device 1 is used. Of course, it can also be applied to a sliding form in which a single weir plate is provided facing the ground when constructing a dam.

(g) 0 Effects of the Invention As described above, the present invention has a main body 7, and a plurality of temperature sensors 9 are provided in the main body 7 in the moving direction of the sliding form 2 at predetermined intervals Ll, etc. Further, the main body 7 is inserted into the concrete 10 in which the sliding form 2 is placed.
Since the configuration is provided with an installation means such as a rod 6 that can be installed so as to be able to move with the movement of the sliding form 2, the temperature of a specific part of the concrete poured in the sliding form 2 can be controlled.
1 degree sensor 9 moving with sliding form 2
A~95 allows continuous measurement as the sliding form 2 moves, eliminating the need for the complicated and uneconomic work of installing multiple temperature sensors in poured concrete.

Furthermore, since the temperature sensor 9 always measures the concrete temperature in the sliding form 2 before demolding (or immediately after demolding, if necessary), a small number of temperature sensors 9 can be used effectively. I can do it.

[Brief explanation of drawings]

FIGS. 1 and 2 are front views showing an embodiment of a placed concrete temperature measuring device according to the present invention. 1... Placed concrete temperature measuring device 2-...
... Sliding form 3 ... Shelter plate 6 ... Installation means (rod) 7 ... Main body 9 ... Temperature sensor 10 ... Concrete Ll ... ...Interval applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji (and 1 other person)

Claims (1)

[Claims] A main body, a plurality of temperature sensors provided on the main body at predetermined intervals in the direction of movement of the sliding form, and a plurality of temperature sensors provided on the main body in the concrete in which the sliding form is placed. A placed concrete temperature measuring device that is configured with an installation means that is installed so that it can be moved with the movement of a sliding form.