KR920001473B1 - Grouting method in underground - Google Patents

Abstract

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Description

Ground hardening material injection method

1 is an overall explanatory diagram showing the construction situation.

2 is an enlarged explanatory view of the distal end of the injection tube.

3a, b, and c are explanatory views showing the opening and closing state of the filter press.

4 is a side view of the filter press showing the relationship between the filtration frame and the opening and closing frame in half.

* Explanation of symbols for main parts of the drawings

1: injection rod 2: operation mechanism

3: injection nozzle 5: sludge suction

6: filter press 31: upper side injection nozzle

32: nuclear nozzle 33: siege nozzle

34: lower side injection nozzle 51: pump

61 filter frame 62 release plate

63: support frame 64: shaft

65 suction part 66 drain part

67: opening and closing frame 68: filter cloth

A: Air B: Fresh Water

C: Air or liquid A D: Hardened material or liquid B

The present invention relates to a ground hardening material injection method to be constructed for the purpose of stabilizing the soft ground, the construction of the foundation of the structure or the support of the drilling film.

Conventionally, the high pressure injection method and the low pressure injection method were used to inject the ground hardener, and among the high pressure injection methods, the substitution charging method and the consolidation filling method were devised, Depending on the completeness and purity, it has been developed in various construction methods such as multi-stage injection method and compound injection method.

However, in any of these cases, the hardened material is not absorbed and impregnated into the target ground at once, so that a large amount of sludge is generated.In order to cope with such rising sludge, a packer is installed at the inlet of the injection pipe. We had no choice but to push them into the surrounding soil or to rise and flow to the ground.

As a countermeasure against the conventional sludge, it is not possible to make it into the soil as well as to flow out of the ground and even to install the packer, and to treat sludge in the form of slurry containing various components, It costs a lot. Of course, these sludges are industrial wastes, and if they are left unattended, they cause pollution. In addition, they are very difficult to handle because they are highly viscous fluids. It is accelerating the increase in liquidity.

On the other hand, if the sludge is pushed with the packer or left to flow, there is a lot of loss in terms of the injection effect. In other words, the sludge of the target soil increases the density of the soil as it is, acting in the direction of decreasing the injection pressure of the hardened material, and diluting the injected hardened material lowers its purity, thereby affecting the coagulation strength. As a result, the treatment of rising sludge causes many problems in the injection effect.

Accordingly, the present invention has been invented to solve the above problems, by pushing the waste into the soil as a waste, or by actively sucking and collecting the sludge flowing out, by increasing the injection effect and treating the sludge at once, The purpose of the present invention is to provide a method for injecting ground hardener that can solve the problems in both work shape and injection effect.

In order to achieve the above object, the present invention provides a lower injection nozzle and an upper injection nozzle having a polymerized structure in an injection rod, and ground hardener is injected from the upper injection nozzle by high pressure water and air surrounding the injection nozzle. Preliminary injection is carried out to remove impurities, and the washing water itself is also sucked and removed together with the sludge to increase the injection porosity and the purity of the hardening material to increase dramatically, and the lower side injection nozzle also has a polymerization structure. The liquid A is contained in the two liquid hardeners from the nuclear nozzle, and the liquid B is injected and mixed from the surrounding nozzle to cope with pure injection.

According to the present invention configured as described above, when the rising sludge is aspirated by a suction pump or the like, the reach of the jetted hardened material classification is reduced because the pressure of the injected hardened material or the pressure of the injected air is reduced and the porosity is increased. In addition, when the injection of fresh water is applied, fresh water injected into the air gap after the suction of the ground water or the viscous soil is removed, so that the cleaning effect is increased and the purity of the sprayed hardener is increased. It becomes possible.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

1 is an explanatory view of the construction situation constructed using the present invention, 2 is an enlarged explanatory view of the distal end of the injection pipe, 3a, b, c is an explanatory view of the opening and closing of the filter press, respectively, and FIG. A side view of the filter press showing the relationship between the frames in half. Reference numeral 1 in the drawing indicates an injection rod supported by the operating mechanism 2 to operate such as lifting, lowering, and rotating, and the front end of the injection rod 1. An injection nozzle 3 is provided on the site side wall to spray hardened material, fresh water, air, and the like supplied through the swivel 4 into the ground.

Reference numeral 5 denotes a sludge suction unit, which actively sucks up the sludge according to the operation of the suction pump 51, and sends the sludge to the filter press 6, which can be opened and closed in parallel. The support frame 63 and the support frame 63 which support the filtration dehydration chamber which consists of the filter frame 61 and the peeling plate 62 which were arrange | positioned, the filter frame 61, and the peeling plate 63, and this support frame 63 are opened and closed frame 67. It is composed of an operating unit consisting of a shaft 64 for opening and closing the filter frame 61 by operating in the form of, the slurry sludge sucked from the suction unit 65 is filled in the filtration dehydration chamber closed by the water supply pressure After being filtered by the filter cloth 68, only the filtered water passes through and is discharged from the drain 66, so that it is supplied to the injection rod 1 again to be used for fresh water spraying.

Wherein the filter press (6) is about 7kg / cm of hydraulic pressure (流 壓) is automatically made filtration, but in the case of the present invention is accompanied by a suction action. It's more effective to systemize using something powerful. The dewatered sludge is caked and peeled off by the separating plate 62 from the filter mold 61 which is regularly opened by the operation of the shaft 64.

Using such a device, the injection rod 1 is inserted and lowered into the excavation ground by an appropriate rotation means. When the injection rod 1 reaches a predetermined depth, the injection rod 1 is removed from the nuclear nozzle 32 of the upper nozzle 31. B) is sprayed with air (A) at high pressure from the surrounding nozzle 33, while the injection rod (1) is rotated up while spraying hardened material from the lower part nozzle (34) at a high pressure, and then the suction pump (51) ), The slurry-like sludge saturated by spraying and washing rises along the insertion gap of the injection rod 1 and is sent to the filter press 6.

The hardened material sprayed from the lower part nozzle 34 at high pressure forms a ground hardened material injection layer having a cylindrical shape by stirring and mixing the surrounding soil having increased porosity according to washing and sludge suction. When the lower part yarn nozzle 34 is a polymerized structure and the liquid A is injected from the nuclear nozzle 32 and the liquid B is injected from the surrounding nozzle 33, the liquids A and B are mixed at the injection port to inject purity. When a layer is formed and needs to be hardened quickly, it becomes possible to respond. In addition, when the hardening material is injected from the nucleus nozzle 32 and the air is injected from the surrounding nozzle 33, the so-called air effect that the reach of the hardening material is long can be enhanced.

Since the present invention is constituted as described above, if the reach of hardening material classification is increased by effectively utilizing the injection pressure, a high purity hardened material injection layer can be formed, and the slurry-like sludge can also be treated at the same time. Therefore, there is an effect that can increase the efficiency in terms of work and cost.

Claims (4)

When injecting ground hardener by inserting the injection rod (1) having ground hard injection nozzle (3) installed in the front end side wall into the excavation ground, the rising slurry-like sludge is sucked and filtered to inject the separated filtrate again. In the ground hardening injection method to be used as water, the ground hardening spray nozzle 3 is composed of an upper spray nozzle 31 and a lower partial nozzle (34) each consisting of a nuclear nozzle 32 and a surrounding nozzle 33, respectively. The injection rod (31) is sprayed with high pressure water from the upper injection nozzle (31) and air from the surrounding nozzle (33), while the lower injection nozzle (34) sprays a curing agent. 1) A fat hardening material injection method characterized in that to be injected while increasing the rotation. The ground hardening material injection method according to claim 1, characterized in that the sludge cake and the filtered water are separated using a filter press (6) as a means for filtering the sludge. The method of claim 1, wherein the hardened material injection from the lower part nozzle (34) is characterized in that the A liquid is sprayed at the nuclear nozzle 32, the B liquid is sprayed at the enclosing nozzle 33, respectively, and then sprayed and mixed. Ground hardening material injection method. The ground hardener injection method according to claim 1, wherein the hardened material injection from the lower partial nozzle (34) is such that the hardened material is injected from the core nozzle (32) and air is injected from the surrounding nozzle (33).

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