JPH07104336B2 - Ground model loading test device - Google Patents

Description

The present invention relates to a model loading test apparatus for ground.

2. Description of the Related Art Conventionally, as a model loading test device for this type of ground, as shown in FIG. 6 (A), a test sand is put into a soil tank and the ground is compacted with a vibrator, etc. (B)
As shown in Fig. 6, the test sand is dropped in the air from the hopper, and as shown in Fig. 6 (C), a plate with small holes is placed on the upper part of the soil tank, and the test sand is put on the plate and is put through the small holes. There was something to make it fall.

Problems to be Solved by the Invention However, the method of putting the test sand into the soil tank and compacting it with a vibrator has a problem that the ground is not uniform and the ground conditions are different for each test, and the hopper From the one in which the test sand is dropped in the air, there is a problem that the hopper must be moved in a plane and the work becomes complicated,
Further, in the case where the test sand is dropped from the plate-shaped small holes, there is a problem that the ground is not uniform because the test sand does not fall particularly near the wall surface of the soil tank.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to make a model loading test apparatus for a ground capable of extremely easily and quickly creating uniform and identical ground conditions. To provide.

[Structure of the Invention] Means for Solving Problems The ground model loading test apparatus of the present invention collects a soil tank for constructing a simulated ground using test sand, and the test sand discharged from the soil tank. Means, and by placing the test sand supplied from the collecting means on a long slender flow plate that is movably set on the soil tank and arranged in a large number, and simultaneously open the plurality of flow plates in an inclined state. It is characterized in that it comprises a ground creating means configured to drop the test sand uniformly at a constant speed, and a loading means detachably mounted on the soil tank, and the soil tank has two units. It is characterized in that the ground creating means is reciprocally moved between these two soil tanks so as to be alternately set with the above-mentioned loading means.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a soil tank, which is, for example, a cylindrical container having a height of 1,200 mm and a diameter of 1,550 mm, which is installed on a concrete base 2. . A pit 2a for discharging and temporarily storing the test sand in the soil tank 1 is formed in the center of the base 2, and the soil tank 1 is sandwiched between the left and right sides of the pit 2a. They are arranged one by one. Sand extraction ports 2b are formed obliquely toward the central pit 2a in the base 2 portion immediately below each upper tank 1 so that the sand in the soil tank 1 can be discharged into the pit 2a. There is. Reference numeral 2b 'is a partition plate, and by listening to it, the sand in the soil tank 1 is discharged to the pit 2a.

3 is a hopper, and a hoist 5 through a chain 4
It is hung from above, and it is possible to descend into the pit 2a.

The hoist 5 is configured to move left and right along a rail 6a of a frame 6 framed on the base 2.

Reference numeral 7 is a ground preparation device as a ground preparation means, and the soil tanks 1 on the left and right along the rail 6b attached to the frame 6
You can move back and forth between them.

3 and 4 show in detail the structure of the ground making device 7 by enlarging it, in which 8 is an elongated flow plate, and by operating a lever 9, a large number of flow lines are arranged. The plate 8 is adapted to be opened and closed at the same time. The opening / closing plate 8 is designed to open in an inclined state.
While letting the test sand piled up on top flow down, it is dropped uniformly at a constant speed.

Reference numeral 10 denotes an annular frame, which is matched with the size of the soil tank 1 so that the sand can evenly drop near the wall surface of the soil tank 1.

Further, in FIG. 5, reference numeral 11 denotes a loading device as a loading means, which is composed of a screw jack 11a, a variable speed motor 11b for driving the jack 11a, etc., and a loading plate placed on the ground. It is designed to put a load on 12. A chain is connected between the jack 11a and the motor 11b so that there is no loss of driving force, and a constant speed load is applied by the constant speed rotation of the motor 11b.
Reference numeral 13 is a subsidence amount measuring device such as a dial zerge for measuring the subsidence amount of the loading plate 12. The loading device 11 and the sinking amount measuring device 13 are attached to the mounting frame 14 set on the soil tank 1 or directly on the soil tank 1. The mounting frame 14 is temporarily removed when the ground preparation device 7 is set on the upper tank 1.

Since the apparatus of the above-described embodiment is configured as described above, first, the hopper 3 suspended from the hoist is lowered into the pit 2a, and the test sand S discharged into the pit 2a is put into the hopper 3. As the test sand S, for example, Toyoura sand or the like is used.

Next, after lifting the pit 2a, the hoist 5 is moved to move the pit 2a onto the soil tank 1.

When the pit 2a is located on the soil tank 1, the test sand S in the pit 2a is dropped on the falling plate 8 of the ground preparation device 7 set on the soil tank 1.

The test sand S piled up on the falling plate 8 is dropped at a constant speed in the earth tank 1 by operating the lever 9 to open the falling plate 8 in an inclined state, and is laminated in a uniform state.

By repeating the above operation, the soil with a predetermined depth is constructed in the soil tank 1.

In addition, when installing the foundation model, the test sand S is installed again until the prescribed ground height is reached after the foundation model is installed on the way.
To drop.

When the ground is completed as described above, the required loading test is performed using the loading device 12 described above.

When the test is completed, the partition plate 2b 'of the sand removal port 2b is opened, and the test sand S in the soil tank 1 is discharged into the pit 2a.

Since the test apparatus of this embodiment is provided with two soil tanks 1, when carrying out a load test in one of the soil tanks 1, the other soil tank 1 simultaneously proceeds with the ground preparation work for the next test. By doing so, the efficiency of the test is improved.

[Effects of the Invention] (1) It is possible to perform a large number of tests on different types of test bodies under the same ground conditions.

(2) Despite the fact that a large number of test sands are handled, it is possible to create the ground in a short time with a few workers.

(3) Regardless of the size of the applied load, it is possible to apply a load to the test body embedded on or in the ground at a constant speed.

[Brief description of drawings]

1 is a plan view showing an embodiment of the device of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view of a ground preparation device, FIG. 4 is a side view thereof, and FIG. 5 is a loading device. An enlarged explanatory view and FIGS. 6 (A), (B) and (C) are explanatory views of a conventional test apparatus, respectively. 1 ... soil tank, 2 ... base, 2a ... pit, 2b ... sand extraction port, 3 ... hopper, 4 ... chain, 5 ... hoist, 6 ... frame, 6a, 6b ... rail , 7 ... Ground preparation device, 8 ... Flowing plate, 9 ... Lever, 10 ... Annular frame,
11 …… Loading device, 11a …… Screw jack, 11b ……
Viable speed motor, 12 ... loading plate, 13 ... sinking amount measuring device, 14 ... mounting frame.

Claims (2)

[Claims] 1. A soil tank for constructing a simulated ground made of test sand, and means for collecting the test sand discharged from the soil tank,
The test sand supplied from the collecting means is placed on a plurality of elongated falling plates which are movably set on the soil tank and arranged in a large number, and the plurality of falling plates are simultaneously opened in an inclined state to form the test sand. A model loading device for a ground, comprising: a ground creating means configured to uniformly drop at a constant speed; and a loading means detachably mounted on the soil tank. 2. The two soil tanks are installed, and the ground creating means is configured to reciprocate between these two soil tanks so as to be alternately set with the above-mentioned loading means. The model loading test apparatus for the ground according to the first section.