KR101370880B1 - grund plne method of construction - Google Patents

Abstract

In the present invention, natural ground (slope) or artificial ground (surface) is steeply sloped, and the groundwater level in the rainy season when the slope is stable in the soil where the groundwater level is high and the elution water is expected in the soils, weathered soils and crushed soils is different depending on the soil. In this case, the groundwater level rises to the ground surface, and it is a method that can cope with the earth pressure and water pressure within the allowable surface by inserting into the ground. Horizontal drainage pipes are used, which causes deep infiltration and groundwater to not be discharged to the ground quickly, acting as an unstable factor in slope stability, causing property and casualties.
In order to solve this problem, in order to shorten the permeate stream length and to drain in various directions and soil layers, a water collecting boring pipe is installed in multiple stages in a radial (multi-directional) manner to collect groundwater or effluent. It provides a construction method to stabilize the ground by collecting water by reducing the groundwater level by collecting the natural oil and reducing the water pressure (considering the change of groundwater level during the dry and rainy seasons).

Description

Ground stabilization method using a collecting well with radial multi-stage lower half-section water collection pipe

The present invention relates to a ground stabilization method of a sump well and a sump well in which a radial multi-stage lower half-section water collection pipe is installed, and more specifically, a sump boring (well bucket, core well) is installed and a catchment boring is installed as a horizontal wearer in the sump well. Reduced water pressure by lowering the groundwater level by the natural flow by collecting water pipes by collecting water pipes to shorten the length of the infiltration of the deep water and the groundwater length of the groundwater, and to collect the groundwater in a radial (multi-directional) multi-stage in order to drain in various directions and soil layers. It is about the ground stabilization method.

In general, the ground stabilization or slope reinforcement calculates the ground strength constant according to the soil test and performs slope stability analysis. At this time, the slope stability analysis is performed by dividing the slope into dry and rainy seasons in the ground state. However, if it is outside the standard safety factor, the slope is inserted into the reinforcement and the slope stability analysis is performed again to see if it meets the standard safety factor under dry and rainy conditions.

At this time, the location of the groundwater level during the rainy season is very important. According to the current standard, the location of the groundwater level during the rainy season varies depending on the soil, but in the case of earth and sand, the groundwater level rises to the ground, and the slope safety factor is examined for the combined force of the earth pressure and water pressure.

Thus, when the rainy season meets the standard safety factor during the rainy season before and after the slope reinforcement, the horizontal drainage function and effect are neglected.

However, in areas where the groundwater level is high and the elution is expected in earth and sand, weathered soil, crushed soil, or disaster risk zones, only the groundwater infiltration can be discharged as a general horizontal drainage drilled into the ground as shown in Figs. Elution water is devastated due to the loss of shear strength due to the generation of pore water pressure due to the depth and efficiency of horizontal drainage, and the reduction of construction efficiency, and a huge budget is invested in the recovery of property damage and damage caused by structural damage due to ground deformation.

Recently, in order to solve the above disadvantages, a method of inserting an S-shaped bundle bundle tube shown in FIG. 7 into a perforated surface perforated on a slope has been constructed.

Said S-shaped bundle bundle tube is wrapped in a plurality of S-shaped bundle tube 100 with a non-woven fabric 102 and put into the perforated surface 104 perforated on the slope to be drained, which is due to the bundle inside the bundle There is a disadvantage that full depth of drilling is impossible to check, sediment is accumulated on the non-woven fabric 102 surrounded by the outer side of the bundle pipe, and the drainage function is suddenly degraded after the construction, so that there is a lot of difficulty in maintenance.

In addition, when the bundle tube is inserted into the perforated surface on the slope, a drainage failure is expected due to a closed end where the nonwoven fabric of the auditor is caught by the protrusion inside the perforation so as not to enter the perforation length.

In addition, the perforation aperture of the perforated surface to be perforated on the slope by the bundle bundle is increased, rather there is a problem that is detrimental to the stabilization of the slope.

Therefore, structural damage or property damage and human life due to soil deformation due to the depth and workability of horizontal drainage drilled and inserted in the earth surface of soils, weathered soils and crushed soils or disaster risk areas where high groundwater level is expected and elution is expected. A construction method that can solve the problems caused by the damage was required.

In order to solve the above problems, the present invention is to reduce the infiltration stream length in areas where high groundwater level and high effluent water are expected in soil, weathered soil, and earthquake soil or disaster risk zone, and to discharge in multiple directions and soil layers. Multi-direction) Perforate the water collecting pipe (lower half-section strainer) by water collecting boring in a multi-level boring machine and collect it into the water collecting wells (well, deep well) to reduce the water pressure caused by the decrease of the groundwater level. It aims to stabilize.

In the present invention, as the above-described geological structure is high in the groundwater level in the soil, weathered soil, buried soil or disaster risk zone, and the leaching water, that is, the groundwater level during the rainy season when the slope stability analysis is expected in the area where groundwater outflow is expected, In the case of earth and sand, the groundwater level rises to the ground surface, and it is a method to cope with soil pressure and water pressure within the allowable range by analyzing slope stability for the combined force of soil pressure and water pressure, but in the area where the groundwater level is high and the spring water is expected to slope The grouting hardening required to fix the nail or anchor inserted inside is disturbed, and the reinforcement is vulnerable to tensile or pull-out resistance, which acts as an unstable factor for slope stability.

Therefore, in order to achieve perfection, the slope reinforcement in the area where the groundwater is affected is carried out by taking the water pressure relief measures (well bucket, core) and the collection pipe (lower half-section strainer) before the slope reinforcement. It is effective for the ground stabilization method if the water is bored by water collecting and collected into the water collecting well and discharges naturally through the lower drainage outlet.

Fig. 1. General slope reinforcement cross section
Figure 2. General slope reinforcement development
Figure 3 of the water collecting well and the collecting pipe of the present invention
4. The sump of the present invention and the collection pipe of the present invention
Figure 5. Arrangement of the water collecting tube of the present invention
6. Collection plan and construction procedure of the present invention
7 is a cross-sectional view of a bundle tube of a conventional S-shaped bundle.

Hereinafter, a specific construction method of the present invention will be described with reference to the accompanying drawings.

First, the present invention will be described in detail with reference to FIGS. 2 to 4.

For reference, in the drawings of the present invention, the same components as those of the conventional configuration are given the same names and the same reference numerals, and a detailed description thereof will be omitted.

Figure 3 is a perspective view showing a sectional view of the sump well and the collecting pipe of the present invention, Figure 4 is a top plan view showing the plan view of Figure 3 is a perspective view of the present invention as an unfolded arrangement of the sump and the sump.

3 to 5, the water collecting well (well bucket, deep well) 10 of the present invention through a water collecting pipe 20 or a horizontal hole 30 at a place where rainfall is collected or upstream of the reinforcement slope. Collecting infiltration or groundwater into the sump (10) to install a drain pipe (40) in the manhole (50) installed at the bottom of the road to quickly discharge the infiltration or groundwater to suppress the rise in groundwater level to prevent the occurrence of pore water pressure and loss of shear strength Nail (60), earth anchor (90), hard pile (70), retaining wall (80), pullout resistance due to tensile force or force pile and retaining wall It contributes to slope and ground stabilization by satisfying stable conditions.

The water collecting well 10 is formed in a cylindrical shape, and the outer surface of the water collecting pipe hole 32 and the horizontal hole 30 are radially punctured, and the water collecting pipe 20 in the water collecting pipe hole 32. ) Is connected radially.

The water collecting pipe 20 inserted into and fixed to the water collecting pipe hole is composed of a lower half-section strainer cut in half in a longitudinal direction, and a water collecting hole 34 penetrating up and down is drilled to penetrate or infiltrate water into the water collecting pipe. This will allow it to flow out quickly into the sump.

The water collecting pipe is formed by cutting the circular pipe in the longitudinal direction and installing the cutting surface downward, so that a circular space is formed inside, so that the depth of drilling can be easily checked to confirm the construction to the design depth, and the water collecting hole penetrated up and down ( 34) It prevents the inflow of soil in the perforation and discharges only groundwater during rainfall, so it has excellent drainage function.

The collecting hole 34 drilled in the collecting pipe of the present invention can be optimized by the following mathematical calculation.

Use water pipe specifications diameter Inner diameter 50 ^mm material PE half-section perforated pipe

Collection cross section (per m) Inlet size Diameter 6mm Inlet hole spacing
(Bottom half section) 5 rows in width (5 rows in bottom side) 16 lines in length (16 lines on the bottom side) Number of inflow holes 5 rows X 16 rows = 80 pcs / m House area Inlet hole cross-sectional ^{area: πD 2 = 3.14X0.006 2 = 2.826X10} -3 m 2 Inlet flow velocity 0.02 ^{m / sec} Collection quantity (per m) Q = AV = 2.286X10 ^-3 X80 ^{pcs / W} X0.02 ^{m / sec} = 4.5216 ^{m3 / sec} X10 ^-3
* 4.5216X10 ^-3 X m ^{3 / sec} X86,400 ^{sec / day} = 390 ^{tons / m per day}

The method of stabilizing the ground by reducing the water pressure by lowering the groundwater level to the natural flow by using the water collecting well (well bucket, core well) and the water collecting pipe (lower half-section strainer) of the present invention will be described with reference to FIG. Slope stability analysis step by calculating the soil strength constant during soil investigation; (b) Determination of high groundwater levels, watershed areas and disaster risk zones; (c) Selecting the catchment location of the canyon and fold points in the watershed system, and calculating the capacity of the catchment well and determining the capacity. (d) Slope stability analysis step by numerical and penetration analysis according to the catchment installation. Work and shoe installation, installation of inner mold of collecting well and reinforcing steel formwork, installation of external formwork, concrete placing and curing, lifting of excavation of soil in collecting well, lifting of excavated soil for excavation of shoe roots It provides ground stabilization method by water pressure reduction consisting of drainage to earth and manhole, installation of perforated working pipe in collecting well, installation of horizontal anchoring base, collecting well drilling and collecting pipe, installation of collecting well lid, and completion of construction. .

The above-mentioned soil investigation judges the earthquake, weathered soil, sedimentary soil, lime and coal seam disaster risk zones, and measures the groundwater level during dry and rainy seasons to determine the number of construction of catchment basins according to the soil. To let it out.

In addition, during the selection stage of the catchment well, the gathering position and drainage point are identified and the upstream side of the reinforcement slope is selected.

On the other hand, the installation of small diameter deep wells in the case of large diameter but now robots or ultra high-speed hydraulic pressure and the development of drainage material flexibility for the connection of the horizontal landing rod length and the collection pipe is varied by the same procedure as in FIG. It will be available.

At this time, the height of one rod of the sump is small (usually H = 1.5 _~ 2.0m) so that it does not incline to sinking, and if several drainage basins are installed and drained to the earthen point in one direction, it is always installed with one row of drainage pipes and one row of reserve drains. In addition, when one additional sump is added, the additional ground heat should be installed to facilitate the discharge of groundwater.

In this way, when installing the sump well, together with the sump well or the coarse pile (nail, retaining wall), etc., be sure to install the sump well beforehand to reduce the water pressure by reducing the groundwater level. Reinforcement should be carried out.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. .

10: water collection well (well, water well)
20: water collecting pipe (lower half section strainer)
30: horizontal hole 32: water collecting hole
34: catching hole 40: drain pipe
50: manhole 60: nail
70: hard pile 80: retaining wall
90: earth anchor

Claims (4)

In order to increase the safety factor of the slope and the ground, after the drilling of the ground, a nail (Soil Nail) 60 is inserted into the perforation, a hole is inserted into the retaining wall 80 and the ground, and the rebar or steel wire is inserted into the mortar. After grouting and hardening, it is configured to stabilize the slope and ground by applying tensile force to the rebar or steel wire from the outside to settle the earth anchor 90 and the hard pile 70, and at the place where rainfall is collected or upstream of the reinforcement slope. Infiltration water or groundwater is collected through the water collecting pipe 20 or the horizontal hole 30 into the water collecting well 10, and a drainage pipe 40 is installed in the manhole 50 installed at the lower end of the road to quickly discharge the infiltration water or groundwater. In the ground reinforcement method to stabilize the slope and ground by preventing the rise of pore water pressure and the loss of shear strength
The water collecting well 10 is formed in a cylindrical shape, and the outer surface of the water collecting pipe hole 32 and the horizontal hole 30 are radially drilled, and the circular pipe is formed in the water collecting hole 32. Ground stabilization method using a water collecting well installed radial multi-stage lower half-section water collecting pipe, characterized in that it consists of a lower half-section strainer cut in half in the direction, the water collecting pipe 20 is perforated water collecting holes on the surface. delete delete delete

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