KR100705720B1 - Apparatus for injecting BGI groution material for improvement of soft ground - Google Patents

Abstract

The present invention is a grouting solution composed of silicic acid and cement and BGI grouting material injected into the ground to reinforce the ground A and B liquid at the tip of the injection tube so as to be precisely blended in a volume ratio of 1: 2 The present invention relates to a BGI grouting material injection device for soft ground improvement to maintain each cylinder diameter at a constant ratio to supply the liquid A and liquid B to the installed tip mixing device.

        In the existing stirrer, A material (333 kg of cement and 167 L of silicate), B material (BGI) -1 25 kg and water or BGI-2 No. 8.33 kg are mixed and supplied to the injection pipe end device and injected into the ground. In the apparatus, the crankshaft (1) having two crank pins (2a, b) having upper and lower points, the two pistons (3a, b) provided at each crank pin (2a, b), and a one-way valve, respectively, It consists of a main body 4 having cylinders 5a and b with suction holes 6a and b for mounted materials A and B and discharge ports 7a and b, and the volume and discharge port 7a of the cylinders 5a and b. (b) The aperture of soft ground improvement (B) is formed to have a constant area so as to meet the standard mixing ratio 1: 2 of material A and material B, and has a diameter of 32mm: 44mm or 44mm: 62mm, respectively. BGI) grouting material injection device.

Description

BG groution material injection device for soft ground improvement {Apparatus for injecting BGI groution material for improvement of soft ground}

1 is a vertical front view of a BGI grouting material injection device according to the present invention

2 is a schematic plan view

3 is a partial cutaway right side view of FIG.

<Explanation of symbols for the main parts of the drawings>

1: crankshaft 3a, B: piston

4: main body 5a, b: cylinder

7a, b: discharge port

The present invention provides the A material to the tip mixing device installed at the tip of the injection pipe so that the A material and the B material forming the BGI grout material for the soft ground improvement are precisely 1: 2 volumetric mixture. As for the apparatus which can supply material and B,

        Cement, silicic acid, and fastening BGI-1 or BGI-2 for crushing are mixed at a volume ratio of 1: 2, which is an optimal ratio, and injected into the soft ground. The present invention relates to a BGI grouting material injector for improving the soft ground which improves the ordering effect by increasing the compressive strength and improves the ordering effect by maximizing the grouting efficiency.

In the conventional underground injection material injection method for improving the soft ground or forming the barrier wall, the injection hole is drilled to a predetermined depth in the ground, and the injection rod is inserted into the injection hole, and then the rod is raised from the bottom of the injection hole. There is a method of injecting the injection material.

       The method cannot be arbitrarily controlled by the hardening time of the injection material, which is dependent on the operator's experience, and often fails to meet the soil conditions or the purpose of the injection, and is ground grouted by using excess silicic acid in the injection material. As the strength of the soil was lowered, there was a significant problem in increasing the effective soil order and the soil strength.

A new underground injection material injection method for improving the above problems is the Patent No. 439052 by the applicant.

        The prior art overcomes the uneven penetration of grouting materials by grouting the BGI grouting material in which an appropriate amount of silicic acid is blended by adjusting the discharge pressure according to the working conditions such as the strength of the ground to be ordered and the ground state. It improves the strength and order performance of grouted ground by increasing the uniaxial compressive strength according to the proper amount of used, and the hardening time by controlling artificial mixing ratio of grouting material to meet the soil condition and the purpose of reinforcement of soil reinforcement site. Material A of cement and material B, which is a BGI grouting material for fastening or terminating, are blended at a ratio of 1: 2, and the material of A and B is mixed in a tip mixing device mounted on the end. .

        In order to see the effect of the prior art, it is important to mix the silicic acid, cement, and BGI grouting material in a volume ratio of 1: 2 accurately and precisely to inject it into the ground.

Therefore, it is a device of the present invention to propose to maintain the compounding ratio of the grouting material accurately.

        Conventional suspension injectors are equipped with an isostatic pump to mix A and B solutions 1: 1 so that grouting fluid is injected into the ground using the same. It was a problem of the conventional grouting injector that it was practically impossible to inject while maintaining it.

Accordingly, it is an object of the present invention to provide an infusion apparatus for a BGI grouting material for inexpensive soft ground improvement that can ensure accuracy in blending silicic acid with cement and BGI grouting material.

In order to achieve the above object, the present invention is provided with a material supply part for silicic acid and cement and a B material supply part for BGI-1 or BGI-2, which is a composition for BGI grouting material, The material A and the material B are 32mm: 44mm or 44mm: 62mm in diameter, respectively, and the material A and B are supplied to the tip-hop mixer at the tip of the injection pipe, so that the material A and B have a volume of 1: 2. The present invention proposes a BGI grout material injection apparatus capable of inhaling and discharging to be blended at a ratio.

BGI grout material for soft ground improvement is composed of A material consisting of 333 kg of cement and 167 L of silicic acid per cubic meter, and 25 kg of BGI-1, which is a fast grout, or BGI, which is a ground grout. -2 is composed of 8.33 kg and appropriate amount of water B material.

The uniaxial compressive strength of the fastening grout material blended with the A material and the BGI-1 material B reached 7 kg / cm2 after 7 days, and the B material with the A material and the BGI-2 material The uniaxial compressive strength of the blended tertiary grout material after 7 days is as high as 50 kg / cm 2. The hardening time of the grouting material for fastening is 3 to 9 seconds, and the hardening time of the grouting material for fastening is 45 to 60 seconds.

BGI grouting materials use only about 2/3 of the amount of silicic acid per 1㎥ compared to the previous one, and increase the unit cement amount to increase durability while increasing the strength to prevent dissolution phenomenon. By exerting the ground, the ground can be strengthened according to the designed strength.

       This BGI grouting material is used for soft ground such as silty sand, sand gravel layer, and gypsum layer.

1 to 3, the blending device for the BGI grout material for soft ground improvement is a two-stroke pump. That is, the crankshaft (1) having two crank pins (2a, b) with the upper and lower points opposite, two pistons (3a, b) provided on each crank pin (2a, b), and the inlet for A and B materials It consists of the main body 4 which has the cylinder 5a, b with 6a, b and the discharge ports 7a, b.

The uniaxial cylinder 5a is smaller than the other cylinder 5b which is used for B material for A material. In addition, each inlet 6a, b is provided with one-way valves 8a, b which open the inlet when A or B material is inhaled, and A outlets 7a, b in the cylinders 5a, b. Or the one-way valve which opens a discharge port only when material B is discharged is provided.

The cylinders 5a and 5b differ in the amount of suction of the A and B materials per ash so as to correspond to the 1: 2 blending ratio of the A and B materials, and at the same time, the discharge port 7a for the A material and the discharge port 7b for the B material are as described above. Place the ferris wheel in accordance with the differential of the contents of the same cylinders 5a and b. That is, the diameters of the diameters of the ejection openings 7a and b having the same height and the same diameter of the cylinders 5a and b are 32 mm: 44 mm or 44 mm: 62 mm, respectively, in accordance with the standard mixing ratio of 1: 2, which is the material A and B. It is.

When the cylinders 5a and b and the discharge ports 7a and b are configured in this way, each time the crank 1 performs one stroke (one revolution), the suction amount of the A material and the B material and the A material discharged to the discharge port 7a and The mixing ratio of the B material discharged to the discharge port 7b can be delivered to the double tube precisely at a volume ratio of 1: 2.
As mentioned in the present invention, “Cylinders 5a and 5b constituted by pistons 3a and 3b respectively connected to crankshafts 1 and 2 crank pins 2a and 2b in two-stroke crankshafts. When the crank rotates, the pistons connected to the pins reciprocate in the cylinder, and the crank shaft is the B material mentioned in the present invention through the two suction ports 6a and 6b during the suction process. Either BGI-1 or BGI-2 is to inhale a mixture of cement and silicic acid as material A, and then the crankshaft is Although the B material is not shown in the drawings through the discharge ports 7a and 7b (because it is not the main point mentioned in the present invention, the drawings are omitted), but as mentioned in the [Detailed Description of the Invention], The A and B materials are separated and sent out to the pipes connected to the pipes, respectively, and then A and B respectively injected through the double pipe by a tip mixing device (not shown) mounted at the tip of the grout injection device. After the ash is mixed, the grout material is injected into the ground through the nozzle which is the injection tip.

As described above, the BGI grouting material injector for soft ground improvement according to the present invention has a diameter of a cylinder in order to maintain a constant mixing ratio of A and B materials, which are raw materials of BGI grout, at the soft ground improvement site. It provides 32mm: 44mm or 44mm: 62mm, respectively, so that the diameter of the discharge port with the same height and height is 1: 2, which is the standard mixing ratio of A and B, so that the mixing ratio is kept constant when injecting grout material into the ground. Thus, by using this to improve the durability of the grouting while improving the quality of the grouting to improve the durability.

Claims (4)

         A material (333 kg of cement and 167 L of silicate per 1m3) and B material (BGI) -1 25 kg and water or BGI-2 No. 8.33 kg) are placed in the tip mixing device of the injection tube. In the device for supplying,         Crankshaft (1) with two crank pins (2a, b) with upper and lower points opposite, two pistons (3a, b) installed on each crank pin (2a, b), A material and B each equipped with one-way valves It consists of a main body 4 having cylinders 5a and b with inlet ports 6a and b for recycling, and the volume of the cylinders 5a and b and the diameter of the discharge ports 7a and b. BGI grouting material injection device for soft ground improvement, characterized in that each of a certain diameter is formed to meet a certain mixing ratio of the material A and B. delete          The method of claim 1,          BGI grouting material injection device for soft ground improvement characterized in that the constant diameter is formed of 33mm and 44mm, respectively.          The method of claim 1,          BGI grouting material injection device for soft ground improvement characterized in that the constant diameter is formed of 44mm and 62mm, respectively.

Images