TWI588252B - Material for Filling the Gap Outside Inclinometer Casing with Groundwater Monitoring - Google Patents

Description

Ground inclined pipe and water level observation well joint material

The present invention relates to the technical field of inclined tubes, and more particularly to a caulking material filled between a tilted tube and a bare hole in the ground.

The method of interpretation of potential sliding surface depth in general slopes or slopes can be divided into: (1) estimation method by sliding scale, (2) empirical method of core inspection, and (3) quantitative analysis method of monitoring; The method belongs to the most direct and effective method of interpretation. Please refer to Figure 1 for a schematic architectural diagram of the quantitative analysis method for monitoring. As shown in Fig. 1, when the monitoring method is applied, it is necessary to excavate a bare hole 21' before a slope to be measured 2', and then insert an inclinometer casing 1' into the bare hole 21'. Finally, a gap material 22' (sand or cement mortar) is filled in the gap between the bare hole 21' and the inclined tube 1', and then the gap material 22' is tamped. It should be noted that the tilting tube 1' is provided with an inclinometer 11', and the tilting device 11' is electrically connected to a digital data on the ground through a cable 111'. Take the system (Digital Data Acquirer) 3'.

Since the inclined pipe 1' is made of ABS material (Chinese full name: acrylonitrile-butadiene-styrene copolymer, English full name: Acrylonitrile Butadiene Styrene), when the slope of the slope to be measured 2' is changed In the position, the inclined pipe 1' embedded in the slope 2' to be tested will also be displaced along with the formation; at this time, the inclinometer 11' will detect the variation of the inclined pipe 1' and return Pass the relevant measurement signal or data to the digital data acquisition system 3' on the surface to facilitate subsequent data collation and analysis.

From the above description of the quantitative analysis method for monitoring, we can know that the principle of the tilting pipe monitoring in the ground is: by tilting the pipe 1' with the stratum of the slope 2' to be measured, and then passing through the inclinometer 11 'Measures changes in the formation, such as: sliding surface position and sliding amount. Please continue to refer to the ground displacement map measured by the inclined tube shown in Figure 2. It can be seen from Figure 2 that the inclined tube 1' is displaced with the formation as normal. However, as shown in the displacement map of the ground measured by the inclined tube as shown in Fig. 3, since the inclined tube 1' is deformed by being squeezed in the formation, the measured displacement map in the ground shows irregularity. S-shaped recurve phenomenon.

One of the main causes of the S-type recursion phenomenon is the gap material. In recent years, in order to save drilling costs, the engineering industry mostly places the inclined pipe 1' as a groundwater level observation, and usually fills the gap between the bare hole 21' and the inclined pipe 1' with cement sand as a gap material. However, this has created a problem that is difficult to balance. For example, as a ground monitoring, the stiffness of the gap material must be 210 kg/cm ² , and the water permeability of the gap material as a groundwater level must be at least 10 ^-1 cm/sec. At present, the more common situation is that the cement mortar may not be able to completely fill the gap due to poor fluidity, resulting in the self-deformation of the inclined tube 1' or the inability to sense changes in the surrounding formation, thus causing errors in the measurement of the underground displacement data. In addition, it is assumed that sand or fine stone is used as the gap material, and although the requirement of high water permeability is satisfied, it is difficult to achieve the filling quality requirement of high rigidity in the practical surface.

As can be seen from the above description, it is apparent that the cement mortar and the sand or fine stone are not suitable as the gap filled in the gap between the bare hole 21' and the inclined pipe 1' by simultaneously performing the ground monitoring and the groundwater level observation with the inclined pipe 1'. material. In view of this, the inventor of the present invention tried his best to study the invention, and finally developed a ground inclined pipe which is also used as a water level observation well caulking material in the present invention.

The main object of the present invention is to provide a ground inclined pipe which also serves as a joint material for a water level observation well. Different from the conventional gap material used for ground monitoring and groundwater level observation, respectively, cement sandstone and sand or fine stone, the present invention particularly comprises a fluid sealing material and a fiber material in a specific proportion to form a novel joint filler material, so that the The caulking material has a water permeability of at least 10 ^-1 cm/sec and a rigidity of at least 210 kg/cm ² , which enables the underground inclined pipe with this caulking material to serve as both ground monitoring and groundwater level observation. In this way, the purpose of saving drilling costs is achieved.

In order to achieve the above-mentioned main object of the present invention, the inventor of the present invention firstly provides a ground inclined pipe as a water level observation well caulking material, which is composed of a fluid solid material and a fiber material in a specific ratio; The caulk material has a water permeability of at least 10 ^-1 cm/sec and a rigidity of at least 210 kg/cm ² .

In order to more clearly describe the in-ground inclined pipe and the water level observation well caulking material proposed by the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to Figure 4, there is shown a cross-sectional view of a formation to be measured in which a buried inclined pipe is buried. As shown in FIG. 4, the ground layer 2 to be tested is dug with a bare hole 21, and a tilting pipe 1 accommodating an inclinometer 11 is placed in the bare hole 21. The present invention provides a ground inclined pipe and a water level observation well caulking material 22 (hereinafter referred to as caulking material 22), which is shown in FIG. 4 and filled between the bare hole 21 and the inclined pipe 1. Within the gap.

The main purpose of the present invention is to propose a special composition of the caulking material 22, so that the underground inclined pipe with the caulking material 22 can be used for both ground monitoring and groundwater level observation, thereby achieving the purpose of saving drilling costs. In particular, since the caulking material 22 proposed by the present invention is composed of a fluid-curable material and a fiber material in a specific ratio, the caulking material 22 has a water permeability of at least 10 ^-1 cm/sec and at least 210. The rigidity of kg/cm ² .

The fiber material is an irregularly arranged fiber, such as glass fiber, carbon fiber, or polymer fiber; wherein the glass fiber is also called glass fiber, and the carbon fiber is formed of a carbonized polymer. In addition, polymer fibers are also a type of rayon, which is usually synthesized from petrochemical raw materials. The main polymer fibers are: polyolefin fiber, polyvinyl alcohol fiber, polyvinyl chloride fiber, polyacrylonitrile fiber, polyester fiber, thermosetting. Resin based fiber.

In the present invention, the fibrous material is used as a hollow backbone of a caulking material, and the fibrous material is mixed with a fluid curing material. In the present invention, the fluid-curing material is a thermosetting polymer-cured material such as epoxy resin, unsaturated polyester, unsaturated resin, Phenolic resin, and bismaleimide resin. (Bismaleimide resin, BMI). For example, when an epoxy resin is selected as the fluid curing material, as long as the epoxy resin is mixed with a resin hardener, the bare hole 21 and the inclined tube 1 are filled (as shown in FIG. 4). In the gap between the two, wait for the epoxy resin to harden to complete the production and caulking of the caulking material without any subsequent tamping operation. Among them, the ratio of epoxy resin to resin hardener is about 3:1.

Alternatively, a fibrous material may be used as the hollow backbone of the caulking material, and cement is used as the fluid curing material. For example, when cement is selected as the fluid solidifying material, as long as the cement and the cement hardener are mixed with the fiber material, (as shown in FIG. 4), the gap between the bare hole 21 and the inclined pipe 1 is filled. After waiting for the cement to harden, the production and caulking of the caulking material is completed, and no subsequent compacting operation is required. Among them, the ratio of cement to cement hardener is about 3:1.

Thus, the above-mentioned system has completely and clearly explained that the inclined pipe of the present invention also serves as a water level observation well caulking material. From the above, we can know that the present invention has the following advantages:

(1) Different from the traditional technology, cement sandstone and fine sandstone are respectively applied as gap materials for ground monitoring and groundwater level observation. The present invention is specially composed of a fluid-solidified material and a fiber material in a specific proportion. The caulking material enables the caulking material 22 to have a water permeability of at least 10 ^-1 cm/sec and a rigidity of at least 210 kg/cm ² , so that the underground inclined pipe matching the caulking material 22 can serve as both Medium monitoring and groundwater level observations are used to save drilling costs.

(2) In addition, in terms of the cost of the caulking material of the present invention, the unit price of the fiber material is about 200 yuan/kg, and the unit price of the epoxy resin (calculated according to EPOXY: hardener = 3:1) is about 300 yuan/kg. It can be seen that the unit price of the caulking material proposed by the present invention is about 200-300 yuan/kg, and the average unit price is about 250 yuan/kg. Assuming that the gap between the bare hole (aperture of about 0.099 m) and the inclined tube (about 0.070 m of the outer diameter) is about 0.029 m, the filling depth is mixed with the epoxy resin and the fiber required for the distance between the bare hole and the inclined tube. The weight of the joint filler is about 3.85 kg, and the cost of the joint application material is 963 yuan per meter. In general, the depth of the inclined pipe in this type of land is at least about 10 meters, so the wage plus material fee is up to 1,163 yuan / meter. However, the average cost of drilling operations for the inclined pipe and the water level well in the engineering industry is as high as about 1,500~3,500 yuan/meter.

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

<present invention>

2‧‧‧The formation to be tested

21‧‧‧Naked holes

22‧‧‧Seamable material

1‧‧‧Sloping tube

11‧‧‧ tilt meter

<知知>

2’‧‧‧Slopes to be tested

21’‧‧‧Naked holes

22’‧‧‧ clearance material

1'‧‧‧Sloping tube

11’‧‧‧ tilt meter

111’‧‧‧ Cable

3'‧‧‧Digital Data Capture System

Figure 1 is a schematic structural diagram showing the quantitative analysis method of monitoring; Figure 2 is a diagram showing the displacement in the ground measured by the inclined tube; Figure 3 is a diagram showing the displacement in the ground measured by the inclined tube; A cross-sectional view of a formation to be measured in which a buried inclined pipe is buried is shown.

2‧‧‧The formation to be tested

21‧‧‧Naked holes

22‧‧‧Seamable material

1‧‧‧Sloping tube

11‧‧‧ tilt meter

Claims (4)

The ground inclined pipe also serves as a water level observation well caulking material, wherein the caulking material is filled between a tilting pipe and a bare hole of a ground to be tested to form a tubular shape, and the caulking material is a fluid solidifying material. Mixed with a fiber material; wherein the fluid-curing material is a thermosetting polymer-cured material or a cement; wherein the fiber material is an irregularly arranged fiber; wherein the caulking material has at least 10 ^-1 cm /sec water permeability and a rigidity strength of at least 210 kg/cm ² . The inclined pipe in the ground according to claim 1 is also used as a water level observation well caulking material, wherein the fiber material is one or a combination of glass fiber, carbon fiber, or polymer fiber. The tilting pipe and the water level observation well caulking material according to the first aspect of the patent application scope, wherein the fluid curable material is a thermosetting polymer curing material selected from the group consisting of epoxy resin (Epoxy) and unsaturated polycondensation. One or a combination of an unsaturated resin, a phenol resin, and a Bismaleimide resin (BMI). The slanting pipe and the water level observation well caulking material according to the third aspect of the patent application scope, wherein the fluid curable material is a thermosetting polymer curing material, further comprising a resin hardener, the resin hardener To cure the fluid-cured material; wherein If the fluid curable material is selected from cement, it further includes a cement hardener for curing the fluid curable material.