JP3054480U - Excavated soil treatment equipment - Google Patents

Abstract

(57) [Problem] To provide an apparatus configuration capable of effectively performing processing of excavated soil including soil cement removed by excavation and lifted to the ground. A forward / reverse pump (4a) is provided for sucking up the excavated soil generated during excavation, filling the excavated shaft with the excavation shaft, and filling the void in the borehole generated below or after the excavation. ing.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an apparatus for treating excavated soil generated when excavating the ground.

[0002]

[Prior art]

 In recent years, when performing excavation work for underground construction such as subway construction, joint ditch construction, and large-scale construction work, the highly water-stopping mountain retaining method such as the soil column method without water during excavation has been widely used. Have been. Especially in urban areas, it can be applied even in narrow spaces, and the construction work using this method has come to be used frequently because of its advantages such as simplification of the work process and shortening of the construction period.

[0003] The drilling machine used in the above-mentioned construction method is provided with one or a plurality of excavating shafts having screw-type notched blades, which are so-called augers, arranged in parallel. Drill and drill holes. At this time, drilling and stirring are performed while the cement suspension is injected into the ground from the tip, so that the drilling is filled with soil cement, and a core material such as H-section steel is later inserted into it. Embed it into a column of soil.

[0004] During the excavation work using the auger or the like, earth and sand or the like removed by excavation including soil cement (and may also include bentonite or ground improvement material) is excavated to the ground as excavated residual soil. Excavated soil generated in this way is temporarily pooled on site and disposed of as industrial waste at any time. In recent years, this type of industrial waste cannot be incinerated, and its disposal, such as securing final disposal sites, has become a social issue in recent years.

Japanese Patent Publication No. 61-40814 discloses a configuration for solving such a problem. According to this configuration, residual soil (including cement milk and the like) generated during excavation of ground is once sieved on the ground. After adjusting the components by further mixing soil and sand binders such as cement and fly ash, the excavation shaft is filled into the borehole when the shaft is lifted.

[0006] Accordingly, the void in the borehole formed after the lifting of the drilling shaft is filled with the residual soil, thereby reducing the amount of the residual soil to be treated as waste.

[0007]

[Problems to be solved by the invention]

 However, in the above configuration, since the component of the residual soil backfilled in the borehole is adjusted, the component of the surrounding soil cement and the component of the backfilled residual soil differ depending on the component adjustment, which causes a problem in design strength. May be. In addition, the residual values of cement and the like in the residual soil are often not constant, and there is a problem that it is difficult to immediately determine the amount of the cement and the like to be additionally mixed by adjusting the components. In addition, it takes time to adjust the components, which requires extra working time.

Further, in this technique, in order to refill the surplus soil, the surplus soil is filled into the ground from the inside of the excavation shaft. Therefore, it is necessary to make particles of sufficiently fine particles when sieving. Clogging occurs in the drilling shaft and in the hose communicating with the drilling shaft, and smooth backfilling is not possible. In addition, it takes time and effort to sift it, which requires extra work time and work space.

The present invention is intended to solve the above-mentioned problems of the prior art and to provide an apparatus configuration capable of effectively performing the processing of the excavated soil.

[0010]

[Means for Solving the Problems]

 Therefore, the apparatus for treating excavated soil according to the present invention uses a suction pump for sucking excavated excavated soil generated during excavation and a gap between the excavated shaft and the hole in the excavated hole generated below or after the excavation. It is basically characterized by having a discharge pump for filling.

[0011] According to the above-described apparatus configuration, excavated soil generated during excavation is sucked by a suction pump, and the excavation shaft is lifted, and a discharge pump is used to fill a gap formed in or below the excavation hole with the excavation shaft. In addition, since the excavated soil is filled, the amount of the excavated soil as waste is reduced. In addition, excavated soil consisting of soil cement, etc., originally becomes a component such as a soil column at the time of excavation. No problem. In addition, the labor for adjusting the components becomes unnecessary, and the work time is shortened accordingly.

[0012] In a second aspect of the present invention, the excavated soil treatment apparatus is characterized in that the suction pump and the discharge pump are configured as a single reversible pump.

In the above configuration, since both pump configurations are combined with one pump, even when the present device configuration is installed in a narrow work space, the installation space can be reduced.

[0014]

[Embodiment of the invention]

 A specific embodiment of the present invention described in detail above will be described. FIG. 1 and FIG. 2 are explanatory diagrams of a use state according to an embodiment of the excavated residual soil treatment device of the present invention. In the figure, 1 is an excavation hole, 2 is an auger as an excavation axis, 3 is excavated soil, 4a is a forward / reversible pump serving as a suction pump and a discharge pump, 4b is a hose connected to the pump 4a, 5 Is a storage tank.

In the configuration shown in FIG. 1, the ground E is excavated while rotating the auger 2 to construct the excavation hole 1. At this time, drilling was performed while pouring the cement suspension into the ground from the tip of the auger 2, and the shaved earth and sand and the cement suspension were kneaded, and the drill hole 1 was made of soil cement. Will be filled.

In FIG. 1, excavated soil 3 generated during the excavation and excavated on the ground is collected by the pump 4 a and the hose 4 b and stored in the storage tank 5.

In the configuration shown in FIG. 2, the auger 2 is pulled up from the excavation hole 1 when the excavation reaches a predetermined depth. At this time, a gap is formed in the excavation hole 1 below the auger 2. In this configuration, the pump 4a and the hose 4b supply and fill the excavated soil 3 in the storage tank 5 toward the gap. At the time of the supply, the excavated residual soil 3 is fed with the discharge end of the hose 4 b facing the outer peripheral surface of the auger 2. With the rotation of the auger 2, the above-mentioned excavated soil 3 is supplied along the blade surface of the screw-type notch blade, and the peripheral surface thereof is lowered. At the time of this backfilling, it is not necessary to exchange the hose 4b between the storage tank 5 side and the auger 2 side, and it is only necessary to reverse the rotation of the pump 4a.

In the above-described configuration, the space in the excavation hole 1 formed below the auger 2 with the lifting of the auger 2 is filled with the excavated soil 3, and the amount of the excavated soil 3 to be treated as waste is reduced. In addition, the excavated soil 3 composed of soil cement, etc., which is backfilled, is originally a component such as a soil column at the time of excavation. Use does not cause any problem in design strength. In addition, since the structure of the suction pump and the structure of the discharge pump are shared by one pump 4a, even when the apparatus configuration is installed in a narrow work space, the installation space can be reduced. Further, with the rotation of the auger 2, the excavated soil 3 is fed along the cutting surface of the screw-type notch blade, so that even if the excavated soil 3 is slightly solidified into a lump, There is no need to adjust the particles, and the clogging of the auger 2 and the hose communicating therewith does not occur, so that the gap can be smoothly filled. In addition, labor for adjusting components and sieving is eliminated, and the working time is shortened accordingly.

In addition, as compared with the configuration of Japanese Patent Publication No. 61-40814, a space for separating and eliminating a plant for collecting and adjusting excavated soil such as a device for sieving and a device for adjusting the component is reduced. be able to. As mentioned above, this method is applied to subway works, joint ditch works, and large-scale construction works that are carried out using narrow spaces, especially in urban areas. It becomes. Also, as no extra equipment is required, assembly time is not required, and maintenance such as washing with water is not required. Furthermore, there is no need for equipment costs or transportation costs to the site.

In the present configuration, the excavated soil is temporarily stored in the storage tank 5. However, the present invention is not limited to this. For example, a hole may be dug in the ground and temporarily placed there, Needless to say, the temporary storage may be performed by the method.

FIG. 3 and FIG. 4 are explanatory views of the use state of the excavated soil disposal apparatus of the present invention when the auger 2 has multiple axes. Since the basic usage is the same as described above, the details are omitted.

[0022]

[Effect of the invention]

 According to the excavated residual soil treatment apparatus of claim 1 of the present application described above, the excavated shaft is pulled up and the void in the excavation hole formed thereunder is filled with the excavated residual soil, and the excavated residual soil is discarded as waste. The amount of processing is reduced. In addition, the excavated soil composed of soil cement and the like is originally used as a component such as a soil column at the time of excavation, so there is no problem in strength if used as it is. In addition, labor for adjusting the components is not required, and the working time and the working space are correspondingly reduced.

According to the second aspect of the present invention, the structure of the suction pump and the structure of the discharge pump are combined by one pump. The installation space can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a use state according to an embodiment of the present invention;

FIG. 2 is an explanatory diagram of a usage state of the excavated soil disposal apparatus according to the embodiment.

FIG. 3 is an explanatory diagram of a use state according to another embodiment of the excavated soil disposal apparatus of the present invention.

FIG. 4 is an explanatory view of a use state of the excavated soil disposal apparatus according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drilling hole 2 Auger 3 Excavated soil 4a Pump 4b Hose 5 Storage tank

Claims (3)

[Utility model registration claims] 1. A suction pump for sucking excavated soil generated at the time of excavation, and a gap in an excavation hole generated under the excavation shaft with the excavation shaft or generated after the excavation.
An excavation residual soil treatment device, comprising: a discharge pump for filling the residual soil. 2. The apparatus according to claim 1, wherein the suction pump and the discharge pump are constituted by a single reversible pump. 3. The excavated soil disposal apparatus according to claim 1, wherein the excavated soil is soil cement.