KR20000071885A - Ladder and Method of Constructing - Google Patents

Abstract

PURPOSE: A laying ladder and an installing method for the same are provided to be installed simply in the inside wall of underground concrete structure and remove the factor that causes crack in the concrete wall. CONSTITUTION: In the end of laying ladder, a male screwed pipe part and a raised part(112) are formed. A reclamation fixing-rod(10) is formed in the inside and has a connecting rods(12) which connects reclamation pipes(11). And inserted legs(21) are inserted into the inside of reclamation pipes, and inserting foot rod(20) having a foot rod(22) which connects the inserted legs. A fastening nut(30) is screwed in the outside of the male screwed part. An installing method for the laying ladder comprises the steps of; installing the male screwed part to pass through the inside panel of mold form; screwing with the fastening nut; forming mold form by assembling an inside panel and an outside panel; concreting into the mold form; removing the mold form after the concrete is hardened; inserting the inserted legs and the inserting foot rod into the inserting way(113) of reclamation pipes.

Description

Laying ladder and its installation method {Ladder and Method of Constructing}

The present invention relates to a ladder embedded in a concrete structure and a method for installing the same, and more particularly, a buried ladder for easily carrying out a task of installing a ladder on an inner wall of a concrete structure embedded in a ground, such as a manhole, and the like. It is about the installation method.

Underground concrete structures, such as manholes, are buried in the ground wherever the roads need to pass through the city. Ladders are installed on the inner wall at predetermined intervals so that workers working therein can be safely entered.

Conventionally, these ladders drill several installation holes at regular intervals in the inner wall of the concrete structure after construction of a concrete structure such as a manhole buried underground is completed through the installation of formwork, concrete placement and curing. It was installed at predetermined intervals on the inner wall of the manhole through a work process of inserting several ladders made of steel separately into the installation holes.

As described above, the conventional method of installing a ladder to the underground concrete structure had to go through a drilling process for drilling holes in the inner wall of the structure after the construction of the underground concrete structure is completed. Here, the drilling work of the inner wall of the structure for installing the ladder is carried out inside the underground structure having a poor working environment in which the working space is very narrow and closed, the working environment of the worker is very poor. This poor working environment has not only increased the chances of causing safety accidents for workers but has also been a motivator for insolvent construction by making normal work difficult. In addition, the excessive drilling work performed on the underground concrete structure causes an impact load on the concrete wall, and the impact load causes cracks in the concrete structure, which is a serious threat to the stability of the structure.

An object of the present invention is to solve the problems caused in the prior art, it is possible to install a ladder on the inner wall of the underground concrete structure in a very simple way, as well as to cause the cracks in the concrete wall It is to provide a buried ladder and its installation method that can be removed essentially.

1 is an exploded perspective view showing the buried ladder of the present invention

Figure 2 is a partially cutaway plan view showing the buried ladder of the present invention

3 is an enlarged cross-sectional view taken along the line A-A of FIG.

Figures 4a, 4b, 4c, 4d will be step by step work process according to the installation method of the buried ladder of the present invention

<Description of the symbols for the main parts of the drawings>

1: buried ladder 2: underground concrete structure 3: formwork

3a: inner panel 3b: outer panel 4: buried holes

10: landfill station 11: landfill 12: connecting rod

13: discharge pipe 20: fitting step 21: fitting leg

22: stepping rod 30: tightening nut C: resin adhesive

111: male thread 112: locking jaw 113: insertion path

114: guide protrusion

Hereinafter, the technical configuration of the present invention in detail.

First, the buried ladder 1 of the present invention, as shown in Figs. 1 and 2, the male threaded pipe portion 111 and the locking jaw portion 112 is formed at the outer peripheral edge of the tip portion thereof, the insertion passage 113 therein Is embedded in the buried pipe (11) and the buried guide (10) having a connecting rod 12 for connecting the buried pipe (11) integrally, and the buried pipe (11) of the buried guide (10) Fitting foot 21 having a corresponding structure, and the fitting foot 20 having a foot tread rod 22 which serves to support the foot of the worker after installation and connects the foot 21, and the buried fixing rod The fastening nut 30 is screwed to the outside of the male screw portion 111 of the buried pipe (11) of the (10).

The buried ladder of the present invention is embedded in the inner wall of the underground concrete structure through the following processes.

When placing underground concrete structures 2 such as manholes embedded in the ground, as shown in FIG. 4A, the inner panel 3a partitioning the boundary line inside the underground concrete structure and the outer panel 3b partitioning the outer boundary line Formwork 3 consisting of) is used. The embedding ladder 1 of the present invention is constructed for each position necessary for the inner panel 3a of the formwork 3.

First, the male threaded portions 111 of the buried pipes 11 of the buried fixing stand 10 are penetrated to the inner panel 3a on which the buried ladder 1 of the present invention is placed, and is caught by the locking jaw 112. Drill holes 4 to the size of the quality.

Next, as shown in FIG. 4B, the buried nut 4 is penetrated through the male threaded pipe part 111 formed at the outer end of the buried pipes 11 of the buried holder 10, and then the fastening nut 30 is inserted into the buried holes 4. It is rotated and screwed to the male threaded portion 111 of the buried pipe (11). At this time, the buried fixture 10 is penetrated to the outside of the formwork 3, all parts except the male threaded portion 111 that is screwed with the fastening nut 30 is firmly fixed to the inside of the formwork (3). In addition, the locking jaw 112 helps the buried fixing table 10 to be temporarily fixed horizontally as well as the concrete paste flows out through the buried holes 4 drilled in the inner panel 3a of the formwork 3. It also plays a role of blocking things

Next, as shown in FIG. 4C, the inner panel 3a and the outer panel 3b are assembled to assemble the formwork 3 for construction of the underground concrete structure 2, and the uncured concrete is poured into the interior thereof. After the curing period of 3, the formwork (3) is dismantled. At this time, it is necessary to loosen the fastening nut 30 in order to dismantle the inner panel (3a).

Next, as shown in FIG. 4d, the fitting legs 21 of the fitting step 20 are inserted into the insertion passage 113 formed inside the buried pipe 11 to complete the installation of the ladder.

The buried ladder of the present invention and its installation method installed through such a process are buried in each of the exact positions of the buried fixing platform 10 into which the fitting stool 20 is inserted in the cross section of the underground concrete structure 2 when uncured concrete is placed. Since the construction of the underground concrete structure (2) is completed, it is necessary to carry out the work for drilling the hole for embedding the fitting step 20 in the interior of the underground concrete structure (2) with poor working environment Disappears. Therefore, the present invention not only fundamentally heals the causes of poor construction, but also does not impart an impact load on the walls of the finished underground concrete structure 2, thereby having an effect that greatly helps the stability of the structure.

Hereinafter, the buried ladder of the present invention through the embodiment of the present invention in more detail.

The buried ladder 1 according to the embodiment of the present invention also has a male threaded portion 111 and a locking jaw portion 112 formed at an outer circumferential edge of the tip portion thereof, and a buried tube 11 having an insertion passage 113 formed therein. A buried pedestal 10 having a connecting rod 12 connecting the buried pipes 11 integrally, and a fitting leg 21 having a corresponding structure inserted into the buried pipes 11 of the buried pedestal 10. ) And the fitting tread 20 having a foot tread rod 22 serving to support the foot of the worker after installation and connecting the fitting legs 21, and the buried pipes 11 of the buried fixing table 10. It is to implement the basic technical idea of the present invention in that it includes a fastening nut 30 screwed to the outside of the male pipe portion 111.

However, in the present embodiment, the buried pipe 11 has a basic technical concept of the present invention in that the plurality of guide protrusions 114 have an insertion passage 113 extending in the longitudinal direction as shown in FIG. Additional technical ideas are added. This additional technical configuration helps the fitting legs 21 of the fitting step 20 to be tightly fitted inside the buried pipe 11 of the buried pedestal 10 embedded in the underground concrete structure 2.

In the present embodiment, the fitting legs 21 are preferably fitted to the insertion passage 113 of the buried pipe 11 after the resin adhesive C is applied to the outer surface thereof, as shown in FIG. . This helps the fitting legs 21 to be firmly fixed in the state inserted in the insertion passage (113).

Finally, in the present embodiment, the connecting rod 12 of the buried anchor 10 is composed of a connecting pipe that is connected to each other inside the buried pipes 11, as shown in Figure 2, It is preferable that the discharge pipe 13 communicates with an intermediate part. The technical configuration of the connection pipe and the discharge pipe is to reduce the resistance of the air pressure when inserting the fitting leg 21 of the fitting step 20 into the insertion passage 113 of the buried pipe 11, to facilitate the insertion operation. It helps.

As discussed above, the buried ladder of the present invention and its installation method need to perform the work of drilling holes in the underground concrete structure with poor working environment after the construction of the concrete structure is completed fitting Disappear. Therefore, the present invention is very useful for stabilizing the structure because it does not fundamentally cure the cause of the insolvent construction and does not impart an impact load on the walls after the underground concrete structure is completed.

Claims (3)

A male threaded portion 111 and a locking jaw portion 112 are formed at the outer circumferential edge of the distal end portion, and the buried pipe 11 and the buried pipe 11 having the insertion passage 113 formed therein are integrally connected to each other. Connecting the embedded bridge (10) having a connecting rod (12), the fitting legs (21) having a corresponding structure inserted into the interior of the buried pipe (11) of the buried guide (10) and the fitting legs (21) And it is screwed to the outer side of the male threaded portion 111 of the fitting step 20 having a foot tread rod 22 to serve to support the foot of the worker after installation, and the buried pipe 11 of the buried fixture 10 Buried ladder characterized in that it consists of a fastening nut (30). The buried ladder according to claim 1, wherein the buried pipes (11) have an insertion passage (113) in which the plurality of guide protrusions (114) extend in the longitudinal direction. The male threaded portions 111 of the buried pipes 11 of the buried fixing stand 10 are penetrated to the inner panel 3a of the formwork 3 through the buried holes 112 to the size of the buried jaw 112. 4) through the buried holes (4) through the male threaded pipe portion 111 formed on the outside of the distal end of the buried pipe (11) of the buried anchor (10), and then the fastening nut (30) by rotating the buried Screw-in with the male threaded pipe portion 111 of the pipe (11), the inner panel (3a) and the outer panel (3b) is assembled to assemble the formwork (3) for the construction of the underground concrete structure (1), and therein After the concrete is poured and the mold 3 is dismantled after a predetermined curing period, the fitting legs 21 of the fitting step 20 are inserted into the insertion passage 113 formed inside the buried pipes 11 again. Method of installing buried ladder, characterized in that to perform the process.