KR20120116223A

KR20120116223A - Open prefabricated perforated casing and casting soil grouting method using the same

Info

Publication number: KR20120116223A
Application number: KR1020110033830A
Authority: KR
Inventors: 김연용
Original assignee: 토양건영 주식회사
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2012-10-22

Abstract

PURPOSE: An open type prefabricated perforation casing and a column-type earth retaining grouting method with the same are provided to prevent soil or underground water from leaching, and to offer a connected steel pipe. CONSTITUTION: An open type prefabricated perforation casing(100) comprises a body, an upper fixture(111), a lower fixture(112). The body comprises two frame portions(121,122) and two openings(131,132). The upper fixture is connected to the upper outer circumference of the body. The lower fixture is connected to the lower outer circumference of the body.

Description

Open-type prefabricated perforated casing and casting soil grouting method using the same {.}

The present invention relates to a multi-hole grouting construction method, and more particularly to a grouting method to increase the work efficiency by continuously and stably reinforce the soft and poor ground.

The present invention relates to a perforated casing for multi-hole grouting construction and an earthquake grouting method using the same.

In general, in the case of civil engineering work, grouting method is used to inflate the weak ground and the poor ground by drilling with a hydraulic drill or various drilling machines, inserting steel pipes into the drilling holes, and then injecting the chemical solution into the injector. .

The grouting method is one of the ground improvement methods and is a pressure injection method for introducing high-density material into the ground, and is a method of injecting a chemical liquid at a predetermined depth through a fine tube or the like for the purpose of reducing the permeability of the ground or increasing the strength of the ground.

However, the conventional grouting method is to inject the chemical liquid by inserting the steel pipes, which are independent of each other in the independent drilling holes, so that the leaching phenomenon by the adsorption water and free water in the soil soil, or the soil leaks between the steel pipes There is a problem that occurs.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is to provide an open prefabricated perforated casing that can insert a connection type steel pipe.

It is a further object of the present invention to provide an open prefabricated perforated casing and connected steel pipes which can be inserted into and connected to adjacent steel pipes.

In addition, another object of the present invention to provide an earthquake grouting method using the open prefabricated perforated casing and connected steel pipe does not occur soil or groundwater leaching between the steel pipe.

According to a feature of the present invention for achieving the above object, the present invention, in the cylindrical perforated casing used for soil grouting, two frame parts and two openings in which the cylindrical body is vertically divided, And two fasteners respectively engaged on the outer circumferential surfaces of the upper and lower portions of the body.

According to the present invention, a screw thread is formed on an outer circumferential surface of the frame portion, and a thread thread corresponding to the thread circumference of the frame portion is formed on an inner circumferential surface of the fixture, and the fastener is rotated on the outer circumferential surface of the frame portion.

The present invention is provided with a protrusion projecting inward on the inner circumference of one end of the fastener.

The present invention, in the steel pipe inserted into the perforated casing used for soil grouting, a cylindrical body, a male connecting portion formed to protrude outward in the longitudinal direction on the outer peripheral surface of the body, and protrudes outward in the longitudinal direction on the outer peripheral surface of the body And a female connector having a receiving groove for receiving the male connector.

The present invention further includes a tubular outer injection pipe formed in the longitudinal direction on the outer peripheral surface of the steel pipe body.

The present invention relates to (a) an open perforated casing—two frame parts and two openings in which the cylindrical body is vertically divided, and two fasteners respectively engaged on the outer peripheral surfaces of the upper and lower parts of the body. Inserting, (b) removing each opening and the upper fixture of the open perforated casing to open the perforated casing, and (c) a connected steel pipe inside the open perforated casing-cylindrical body Inserting a male connecting portion formed to protrude outwardly in the longitudinal direction on the outer circumferential surface of the body and a female connecting portion having protruding outwardly in the longitudinal direction on the outer circumferential surface of the body and having a receiving groove for receiving the male connecting portion; , (d) repeating the steps (a) to (c), each of the open perforated casing is perforated adjacent to each other, and each female connection of the adjacent connected steel pipe Inserting the connected steel pipes to accommodate each male connector, (e) removing the frame portions of each of the open perforated casings, and (f) filling concrete or soil in the interior of each of the connected steel pipes. Include.

The present invention relates to (a) an open perforated casing—two frame parts and two openings in which the cylindrical body is vertically divided, and two fasteners respectively engaged on the outer peripheral surfaces of the upper and lower parts of the body. And (b) opening the perforated casing by removing each opening and the upper fixture of the open perforated casing, and (c) the reinforcing arm protruding outwardly into the open perforated casing. Inserting a circular reinforcing column with a shape of a cylindrical reinforcing bar or spiral reinforcing bar; (d) repeating the steps (a) to (c), each of the perforated open casings perforated adjacent to each other, Inserting circular reinforcement columns such that the respective reinforcing arms of the adjacent circular reinforcement columns are in contact with each other, (e) removing the frame portions of each of the open perforated casings, and (f) each In the interior of the pillar-shaped reinforcement it includes the step of filling the earth and sand or concrete.

According to the open-type prefabricated casing according to the present invention and the jujube type mud grouting method using the same has the following effects.

The present invention can provide an open prefabricated perforated casing capable of inserting a connected steel pipe.

In another aspect, the present invention can provide an open prefabricated perforated casing and a connection type steel pipe which can be connected to the adjacent steel pipes inserted therein.

In another aspect, the present invention can provide an earthquake grouting method using the open prefabricated perforated casing and connected steel pipe does not occur soil or groundwater leaching between the steel pipe.

1 is a perspective view of an open prefabricated perforated casing according to the present invention.
2 is an exploded perspective view of an open prefabricated perforated casing according to the present invention.
3 is a cross-sectional view of an open prefabricated perforated casing according to the present invention.
4 is a perspective view of a connected steel pipe according to the present invention.
5 is a perspective view showing a state in which the connection type steel pipe according to the present invention is inserted into the open perforated casing in which the opening is removed.
6 is a view showing a state in which the connected steel pipes according to the first embodiment of the present invention are connected to each other.
7 is a view showing a state in which a circular reinforcing bar is inserted into the open perforated casing according to the second embodiment of the present invention.
8 is a view showing a state after the completion of the soil grouting method according to the present invention.
Figure 9 is a flow chart showing a soil film grouting method according to the present invention.

Hereinafter, an open type prefabricated perforated casing according to an embodiment of the present invention and a main heat retaining grouting method using the same will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.

It is to be understood that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout the specification.

1 is a perspective view of an open type prefabricated casing 100 according to the present invention, and FIG. 2 is an exploded perspective view of the open type prefabricated casing 100 according to the present invention. The open prefabricated perforated casing 100 is a body consisting of two frame parts 121 and 122 and two opening parts 131 and 132 in which the cylindrical shape is divided vertically, and an upper fixture coupled to the upper outer circumferential surface of the body ( 111) and a lower fixture 112 engaging on the lower outer circumferential surface of the body. The upper fixture 111 and the lower fixture 112 may be provided in a cylindrical shape of a short length for coupling to the body, but as long as the shape of the inner peripheral surface is circular, the shape of the outer peripheral surface may be variously formed. In particular, each frame portion forms a thread on the outer circumferential surface, and each of the fasteners may form a thread corresponding to the thread of the outer circumferential surface of the frame portion on the inner circumferential surface, so that the respective fasteners can be rotated on the outer circumferential surface of the frame portion. However, the openings do not form a thread on the outer circumferential surface, so that each of the fasteners can be easily pulled up or down from the body in the coupled state.

3 is a cross-sectional view of an open prefabricated perforated casing 100 according to the present invention. Since the assembled open perforated casing 100 is fixed by the upper and lower fasteners coupled through the threaded portions as described above, each component of the perforated casing 100 is not easily separated in the assembled state. It is easy to transport and store and can be rotated when inserted into the drilled and drilled holes. In addition, since each opening is not coupled to each fastener by a screw thread, it is possible to remove the upper fastener 111 only by removing the lower fastener 112 and then lift each opening upward. However, since each opening is not firmly coupled to each fixture, each opening can be pulled out by its own weight even in a combined state. To prevent this, each fixture has a protrusion projecting inward on one end inner circumference. Can be formed. That is, the lower fixture may form a protrusion projecting inwardly at the lower end, and the upper fixture may form a protrusion projecting inwardly at the upper end. In the state in which each fastener is coupled to the body, the protrusion prevents the departure of each opening.

4 is a perspective view of a connected steel pipe according to the present invention.

In the mudstone grouting method according to the present invention, the connection type steel pipe 200 is used together with the open prefabricated perforated casing 100. The steel pipe used in the conventional soil grouting is a cylindrical shape, whereas the connection type steel pipe 200 has a cylindrical body 211, a male connector 221 formed to protrude outward in the longitudinal direction on the outer circumferential surface of the body, and the body. Protruding outwardly in the longitudinal direction on the outer circumferential surface of the female connector 222 having a receiving groove for receiving the male connecting portion 221, and a tubular outer injection pipe 231 formed in the longitudinal direction on the outer circumferential surface of the body; It includes. The male connector 221 and the female connector 222 connect a series of connected steel pipes 200 to each other. That is, after any connection type steel pipe is inserted into the open prefabricated perforated casing 100, another connection type steel pipe is installed adjacent to the female connection part of the connection type steel pipe to be newly installed in the male connection part 221 of the already connected connection type steel pipe. 222 can be inserted and installed and vice versa. However, the opening type and the upper fixture 111 are removed from the open prefabricated perforated casing 100 so that the insertion is not hindered by the male connection part 221 and the female connection part 222 protruding from the body of the connection type steel pipe. Insert the steel pipe 200, at this time the lower fastener 112 in the open prefabricated casing 100 is not removed. Accordingly, the male connector 221 and the female connector 222 of the connection type steel pipe are not protruded along the entire length on the outer circumferential surface of the body, and the lower fixture (B) at the lower portion so as not to be disturbed by the lower fixture 112. The length of 112 should not protrude. The external injection pipe 231 provides a means for separately supplying the chemical liquid to the outside of the connected steel pipe (200).

Hereinafter, the soil grate grouting method using the open perforated casing 100 and the connected steel pipe 200 will be described.

Figure 9 is a flow chart showing a soil film grouting method according to the present invention.

First, select the soil to be subjected to the soil grouting method and insert the open perforated casing 100 while drilling into the soil with one or three axis augers. (S911) The perforated casing can be inserted while rotating to facilitate insertion. have. The upper fixture 111 is removed from the inserted open type drilling casing 100 (S921), and the first open portion 131 and the second open portion 132 are removed (S931). This is ready to insert the connection type steel pipe 200. Even when the openings are removed from the open drilling casing, the first frame portion 121 and the second frame portion 122 are fixed to the drilling hole together with the lower fixture 112, thereby preventing infiltration of soil surrounding the drilling hole. You can stop it. As shown in FIG. 5, the male connection part 221 and the female connection part 222 of the connection type steel pipe 200 are inserted into positions where the first opening part 131 and the second opening part 132 exist, respectively. (200) is inserted into the open perforated casing (100). (S941) The above steps are repeated repeatedly, and a series of perforated casings are adjacent to each other, and a series of connected steel pipes 200 are installed to be connected to each other. This completes the shape as shown in FIG. However, as shown in FIG. 7, a circular reinforcement column 300 having a reinforcing arm protruding outward may be inserted in place of the connection type steel pipe 200 as another embodiment of the present invention. Circular reinforcement column 300 is a reinforcement column wrapped around the main reinforcement of the circular stirrup or spiral reinforcement, refers to the form having a reinforcing arm (or reinforcing rod) protruded outward on the outer peripheral surface of the reinforcing column. The reinforcing arm of the circular reinforcement pillar 300 serves to correspond to the male connector 221 and the female connector 222 of the connection type steel pipe 200. That is, when the circular reinforcement column 300 is inserted into the open perforated casing 100, the reinforcing arm is inserted into an open portion (part of the open portion) of the open perforated casing 100. Rebar arm of the series of circular reinforcement column 300 can be installed to face each other. When the installation is completed, the respective frame parts 121 and 122 of the perforated casing are removed. (S951) Each frame part is only coupled with the lower fastener 112 and can be easily removed because the opening parts are removed. . At this time, since the lower fixture 112 is located at the bottom of the drilling hole, it is not easy to remove, so it is not necessary to collect it. As a result, only a series of connected steel pipes 200 are left in the perforation hole, and the concrete or earth is filled in each of the connected steel pipes 200, and the packer pipes are put in each of the external injection pipes 231 to draw out step by step. (S961) When the concrete or soil is filled in the connection-type steel pipe 200, the chemical solution is sufficiently injected into the outer injection pipe 231 to fill the air gap as shown in Figure 8 The grouting is completed. (S991) The chemical liquid used at this time is an inorganic compound such as cement, bentonite, activated silica, magnesium sulfate, sodium carbonate, SiO ₂ powder, and water depending on the ground conditions, reinforcement strength, and the purpose of construction. It can be made by mixing suitably. In case of permanently buried connection type steel pipe 200, concrete is placed therein, but in case of temporary temporary facility, sand, earth and sand are filled in the inside and the connection type steel pipe 200 may be drawn after construction is completed. When a circular reinforcing column is used instead of the connection type steel pipe 200, the circular reinforcing column is filled with concrete or earth and sand.

As a result, the soil around each of the connected steel pipes 200 is strongly grouted to strengthen the ground soil, and because each of the connected steel pipes 200 are firmly connected, leaching and freezing of soil by free water therebetween. The source can be prevented, and the connection type steel pipes 200 have an effect of distributing loads to each other.

In addition, according to the present invention, in the columnar soil grouting method using the open-type prefabricated casing, the upper fixture 111, the two frame portions, and the two open portions of the perforated casing 200 are not buried, and thus there is an advantage that recycling is possible. .

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

100: open perforated casing
111: upper fixing sphere 121: lower fixing sphere
121: first frame portion 122: second frame portion
131: first open part 132: second open part
200: connection steel pipe 211: connection steel pipe body
221: male connector 222: female connector
231: external injection pipe
300: round reinforcing column
500: soil 600: concrete

Claims

In cylindrical perforated casing used for soil grouting,
Two frame parts and two opening parts in which a cylindrical body is vertically divided; And
And two fasteners respectively engaged on the outer circumferential surfaces of the upper and lower portions of the body.

The method of claim 1,
A thread is formed on the outer circumferential surface of the frame portion,
An open prefabricated casing in which a thread is formed on the inner circumferential surface of the fastener to correspond to the thread of the outer circumferential surface of the frame portion, and the fastener is rotated on the outer circumferential surface of the frame portion.

The method of claim 1,
An open prefabricated perforated casing having a protrusion projecting inward on an inner circumference of one end of the fixture.

In the steel pipe inserted into the perforated casing used for soil grouting,
Cylindrical torso;
A male connector formed to protrude outwardly in the longitudinal direction on the outer circumferential surface of the body; And
And a female connection part protruding outwardly in the longitudinal direction on the outer circumferential surface of the body and having a receiving groove for receiving the male connection part.

The method of claim 4, wherein
And a tubular outer injection pipe formed in the longitudinal direction on the outer circumferential surface of the steel pipe body.

(a) perforating the soil and opening perforated casing, consisting of two frame parts and two openings in which the cylindrical body is vertically divided, and two fasteners each engaging on the outer peripheral surfaces of the upper and lower parts of the body; Inserting;
(b) opening the perforated casing by removing each opening and the upper fixture of the open perforated casing;
(c) a connection type steel pipe inside the open perforated casing-a cylindrical body, a male connecting portion formed to protrude outward in the longitudinal direction on the outer circumferential surface of the body and protrude outward in the longitudinal direction on the outer circumferential surface of the body and the Inserting a female connector having a receiving groove for receiving a male connector;
(d) repeating the steps (a) to (c), perforating each of the open perforated casings to be adjacent to each other, and inserting the connection type steel pipes so that each female connection portion of the adjacent connection type steel pipes receives each male connection portion;
(e) removing the frame portions of each of the open perforated casings; And
Filling the concrete or soil in the interior of each of the connection-type steel pipe; heat-shrink soil grouting method using an open prefabricated casing.

(a) perforating the soil and opening perforated casing, consisting of two frame parts and two openings in which the cylindrical body is vertically divided, and two fasteners each engaging on the outer peripheral surfaces of the upper and lower parts of the body; Inserting;
(b) opening the perforated casing by removing each opening and the upper fixture of the open perforated casing;
(c) inserting a circular reinforcing column having a reinforcing arm protruding outwardly into the open perforated casing, in which a shape of the main reinforcing bar is wrapped with a circular strip or spiral reinforcing bar;
(d) repeating the steps (a) to (c), perforating each of the open perforated casings to be adjacent to each other, and inserting a circular reinforcing column so that each of the reinforcing arms of the adjacent circular reinforcing column is in contact with each other;
(e) removing the frame portions of each of the open perforated casings; And
(f) filling concrete or soil in the interior of each of the circular reinforcement columns; heat-staining soil grouting method using an open prefabricated perforated casing.