KR100704642B1 - Apparatus for tensioning ground reinforcing material and tension testing method using the apparatus - Google Patents

Abstract

        The present invention is to perform a tensile test for the ground reinforcement used to reinforce the ground, such as tunnels, slopes, or after drilling a hole of a certain size to reinforce the ground, such as tunnels, slopes, etc. After inserting the ground reinforcement material into the drilled hole and filling with the filling material, the ground reinforcement installed in the drilled hole is drawn out to check whether the tensile strength by the ground reinforcement material meets the design criteria. It is to provide a tensile test method using a ground reinforcement tension device that can perform a tensile test on all kinds of ground reinforcement such as reinforcement pipe and vinyl pipe.

        The ground reinforcement tension device is composed of a hydraulic cylinder consisting of an oil cylinder and an outer cylinder installed in contact with the oil cylinder and a ground reinforcement fixing device for fixing and fixing the ground reinforcement by a fixing wedge,

        Tensile experiments using the apparatus can be divided into two types.

        First, as a tensile test on the ground reinforcement itself is not installed on the site,

        Install the ground reinforcement fixing device in pairs, install hydraulic cylinders between the pair of ground reinforcement fixing devices, and install the ground reinforcing material through the ground reinforcing material, and use the fixing wedges installed in the ground reinforcing material and the ground reinforcing material fixing device. After high fixation, the hydraulic cylinder is injected into the hydraulic cylinder step by step so that the oil cylinder installed at the front of the hydraulic cylinder protrudes at a predetermined interval in the forward direction so that the ground reinforcement is pulled out and the hydraulic pressure injected into the hydraulic cylinder is applied to the instrument. By observation,

        Secondly, the ground reinforcement installed on the tunnel and the slope of the field is drawn out by using the ground reinforcement tensioning device to check whether the reinforcement in which the ground reinforcement and the filler are integrated meets the support force and design criteria.

        After installing hydraulic reinforcement and ground reinforcement fixing device in the order of hydraulic cylinder and ground reinforcement fixing device in the order of tunnel and slope, installed in the ground reinforcing material fixing device after installing the ground reinforcement installed through the hydraulic cylinder and ground reinforcing material fixing device. After firmly fixing and fixing the ground reinforcement by using the wedge, if a certain hydraulic force is gradually injected into the outer cylinder of the hydraulic cylinder by a hydraulic pressure gauge, the oil cylinder installed in front of the outer cylinder is introduced step by step. Step by step toward the front pressure plate, but the ground reinforcement is fixed by the ground reinforcement fixing device installed in the rear of the hydraulic cylinder to start the drawing on the ground reinforcement under the reaction force, and at the same time measure the bearing capacity of the reinforcement embedded with the filling material. Can tunnel and slope The quality of the soil reinforcement work on the construction, which will help determine.

Description

        Apparatus for tensioning ground reinforcing material and tension testing method using the apparatus

        1 is a perspective view showing a tensioning device of the present invention.

        Figure 2 is a view showing a hydraulic cylinder of the ground reinforcement tension device of the present invention.

        Figure 3 (a) (b) is a view showing a ground reinforcement fixing device of the ground reinforcement tension device of the present invention.

        Figure 4 (a) (b) is a view showing a fixing wedge installed in the wedge groove portion of the ground reinforcing material fixing device of the present invention.

        5 is a drawing showing the measurement of the support strength of the ground reinforcement by drawing the ground reinforcement of the ground reinforcement installed on the slope using the ground reinforcement tension device of the present invention.

        6 is a view showing a tensile test of the ground reinforcement in the room using the ground reinforcement tension device of the present invention.

        <Description of reference numerals for main parts of the drawings>

           10: Ground reinforcement tension device

           20: hydraulic cylinder 21: hydraulic hose

           22: handle 23: the outer cylinder

           24: oil cylinder 26: through hole

           30: ground reinforcement fixing device 31: bolt hole

           32: upper fixing plate 33: lower fixing plate

           34: wedge groove

           40: fixing wedge 41: wedge piece

           42: short side 43: long side

           44: groove or protrusion

          100: ground reinforcement body 101: slope

          102: pressure plate

          104: punched hole 105: filler

          106: ground reinforcement material 107: steel rod or filler

        The present invention is to use the ground reinforcement material tension device manufactured to enable the tensile test for all kinds of pipes, such as steel reinforcement, that is, steel pipe, fiber reinforcement pipe, vinyl pipe used to reinforce the ground of tunnels, slopes, etc. Tensile tests are performed on all types of ground reinforcements to be used as reinforcement materials, or the ground reinforcement materials are inserted into the perforated holes drilled on the slopes, and they are filled with fillers and installed with the fillers in the perforated holes in the site where slope reinforcement is applied. It is a tensile test method using a ground reinforcement tension device that can perform a tensile test on all kinds of ground reinforcement materials to draw out the ground reinforcement and to check whether the bearing capacity by the ground reinforcement meets the design criteria. will be.

        The ground reinforcement tension device is a ground reinforcement fixing device for fixing and fixing the hydraulic cylinder and ground reinforcement made of an oil cylinder formed with a through hole so as to penetrate the ground reinforcement in the center and an outer cylinder installed in contact with the oil cylinder by a fixing wedge. Is done.

        The tensile test method using the device is to measure the bearing capacity by drawing the ground reinforcement material installed in the drilling hole with the filler in the field and the tensile test for the ground reinforcement itself.

        Tensile force test on the ground reinforcement itself is to install the ground reinforcement fixing device in pairs, install hydraulic cylinders between the pair of ground reinforcement fixing devices, and then install the hydraulic reinforcement through the ground reinforcement and the ground reinforcement and the ground reinforcement fixing device. After fixing and fixing the ground reinforcement using the fixing wedge, the hydraulic cylinder is injected into the hydraulic cylinder step by step so that the oil cylinder installed at the front of the hydraulic cylinder protrudes at a certain interval toward the front so that the reinforcement is tensioned to the hydraulic cylinder. To observe the injected hydraulic force by the instrument,

        The other is to perform a tensile test on the ground reinforcement material inserted with the filler in the perforated hole formed in the field, the ground installed through the pressure plate through the pressure plate while installing the hydraulic cylinder and the ground reinforcement fixing device in the tunnel, pressure plate installed on the slope After the reinforcing material is installed through the hydraulic cylinder and the ground reinforcing material fixing device, the ground reinforcing material is firmly fixed and fixed using the fixing wedge installed in the ground reinforcing material fixing device, and then the oil pressure gauge is fixed to the outer cylinder of the hydraulic cylinder. When the pressure is injected step by step, the oil cylinder installed in front of the outer cylinder is advanced step by step as the hydraulic pressure is introduced step by step, but the ground reinforcement is fixed by the ground reinforcement fixing device installed at the rear of the hydraulic cylinder. Ground reaction At the same time, the bearing capacity of the ground reinforcement buried with the filling material can be measured while starting the drawing of the steel, so as to confirm the quality of the ground reinforcement work on the tunnel and the slope.

        An object of the present invention is to develop a device to perform a tensile test for all kinds of ground reinforcement materials such as steel rods, steel pipes, glass fiber pipes and vinyl pipes, and to perform tensile tests on steel pipes and plastic pipes that have not been performed before. To provide a tensile test method using a ground reinforcement tension device to ensure the quality of the ground strength reinforcement work.

        Conventionally, wedge-shaped devices have been used to tension elastic materials such as steel wires or steel bars, but such devices can be used only for steel wires and steel bars, but in the case of hollow tubes and ground reinforcement materials for plastic bodies. It was not applicable.

        The main reason for not applying the device is due to the wedge applied to the device, and when the wedge is pulled out while holding it from the outside of the ground reinforcement, and in the case of an empty pipe, the shape of the pipe is deformed or deformed and effectively drawn out. There is a limit that the ground reinforcement which is a pipe and plastic body can not be used as a ground reinforcement material in the field practically impossible, and even if applied to the field has a problem that can not confirm the quality of the ground reinforcement installed on the site.

        The present invention has been proposed to improve the above problems, the hydraulic cylinder and ground reinforcement consisting of an oil cylinder formed in contact with the oil cylinder and the oil cylinder formed in the through hole so as to penetrate the ground reinforcement in the center by the fixing wedge Ground reinforcement tension device composed of ground reinforcement fixing device to fix and fix the ground reinforcement material to the fixing wedge built in the ground reinforcement fixing device constituting the ground reinforcement tension device, and when hydraulic pressure is applied to the outer cylinder of the hydraulic cylinder The oil cylinder installed on the front of the outer cylinder protrudes forward so that the ground reinforcement is drawn out. In the case of steel rods or steel wires, it is possible to settle in the fixing wedge and pull out, but in the case of fiber reinforced or plastic pipes and steel pipes with superior plasticity Inside the tube After inserting the filling material, it is possible to draw all kinds of ground reinforcing materials that settle on the fixing wedge and apply hydraulic pressure to draw the ground reinforcing material, so that it is possible to test the tensile strength of the ground reinforcing material. It is also possible to test the bearing capacity of the ground reinforcement to provide a tensile test method using the ground reinforcement tension device that enables immediate confirmation on site whether or not it meets the design criteria.

        The present invention relates to a tensile test method using the ground reinforcement material tensioning device (10) made to perform a tensile test for all types of ground reinforcement (106) used to reinforce the ground,

        The ground reinforcing material tension device 10 is a hydraulic cylinder (20) consisting of an outer cylinder (23) installed in contact with the oil cylinder 24 and the oil cylinder formed with a through hole 26 in the center to penetrate the ground reinforcement (106) ) And ground reinforcing material (106) is made of ground reinforcing material fixing device 30 to be fixed by the fixing wedge (40).

        The tension test method using the device is designed by measuring the bearing force by drawing the ground reinforcement 106 installed in the drilling hole 104 with the filler 105 in the field and the reinforcing material 106 itself. It is to be able to confirm whether or not the criteria are met.

        Tensile force test on the ground reinforcement 106 itself is installed in a pair of ground reinforcement fixing device 30, but after installing the hydraulic cylinder 20 between the ground reinforcement fixing device 30 installed in pairs ground reinforcement (106) Installed through the ground reinforcement and the ground reinforcement using the fixing wedge 40 installed in the ground reinforcing material fixing device, and then fixed hydraulic pressure is gradually injected into the hydraulic cylinder to the front of the outer cylinder (23) The installed oil cylinder 24 is protruded at regular intervals to the front so that the ground reinforcement 106 is tensioned to observe the hydraulic force injected into the hydraulic cylinder by the instrument,

        The other is to perform a tensile test on the ground reinforcement 106 inserted with the filler material 105 in the drilling hole 104 formed in the field, the hydraulic cylinder 20 to the pressure plate 102 installed on the tunnel, the inclined surface 101 ) And ground reinforcing material fixing device 30 installed through the hydraulic cylinder 20 and ground reinforcing material fixing device 30 through the pressure plate 102 while being installed in the order of After fixedly fixing the ground reinforcement material using the fixing wedge 40 installed in the ground reinforcing material fixing device 30 and injecting a predetermined hydraulic pressure stepwise by a hydraulic pressure gauge to the outer cylinder 23 of the hydraulic cylinder. The oil reinforcement fixing device installed at the rear of the outer cylinder 23 is gradually advanced to the pressure plate 102 in front of the oil cylinder 24 installed in the front of the outer cylinder as the hydraulic force is introduced step by step. The ground reinforcement 106 is fixed by the 30 to start the drawing on the ground reinforcement under reaction force, and at the same time, the bearing capacity of the ground reinforcement body integrally with the ground reinforcement 106 buried with the filler 105 is applied. It is characterized by what can be measured.

        Hereinafter, the operation and effects of the configuration of the present invention will be described in detail with reference to the accompanying drawings.

        1 is a perspective view showing a tensioning device of the present invention, consisting of an oil cylinder 24 having a through hole 26 formed therein so as to penetrate the ground reinforcement 106 and an outer cylinder 23 installed in contact with the oil cylinder. The hydraulic cylinder 20 and the ground reinforcement is made of a ground reinforcing material fixing device 30 to be fixed by the fixing wedge 40.

        Figure 2 is a view showing the hydraulic cylinder of the ground reinforcement tension device of the present invention, consisting of an oil cylinder 24 installed in contact with the outer cylinder 23, both of which are formed through the opening 26 in the center of the ground reinforcement It is configured to penetrate.

        When the hydraulic pressure flows into the outer cylinder 23 through the hydraulic hose 21 by the hydraulic pump controlled by the hydraulic system, the oil cylinder 24 installed in contact with the outer cylinder is gradually advanced.

        Figure 3 (a) (b) is a view showing a ground reinforcement fixing device of the ground reinforcement tension device of the present invention, the upper and lower fixing plates 32, divided into upper and lower fixing plates 32, 33 separated in the same form When the fixing wedge 40, which will be described in FIG. 4, is inserted into the conical wedge groove portion 34 formed inside the upper and lower fixing plates after coupling and installing the bolts in the bolt holes 31, the ground is fixed. The reinforcing fixing device 30 is provided.

        At this time, assembling and installing a plurality of wedge pieces 41 in the wedge groove portion 34 is inserted into a funnel, that is, a cone-shaped fixing wedge 40. The diameter of the through hole 26 formed in the center of the fixing wedge is constant and drawn. To be equal to the outer diameter of the ground reinforcement to be carried out.

        Figure 4 (a) (b) is a view showing a fixing wedge installed in the wedge groove of the ground reinforcing material fixing device of the present invention, the wedge groove formed in the ground reinforcing material fixing device 30 as mentioned in FIG. 34) To be mounted in the conical form, the long side has a larger arc, and the short side has a smaller arc than the long side to form a whole conical shape to facilitate the manufacture and installation in the wedge groove a plurality of wedge pieces (41) After the production is divided into w) to assemble and install a number of wedge pieces in the wedge groove.

        In addition, the ground reinforcing material 106, which is the inside of the fixing wedge 40, i.e., the inside of each wedge piece 41, is inserted into and contacted with a variety of grooves or protrusions 44 such as the shape of the surface of the ground reinforcing material. Make sure that the reinforcement is firmly fixed.

        The wedge pieces 41 may be divided into two or more to be manufactured and installed, and two or three wedge pieces may be used depending on the diameter of the ground reinforcement material. However, according to the site situation, a variety of wedge pieces should be selected and used.

        5 is a drawing showing the ground reinforcement of the ground reinforcement installed on the slope by using the ground reinforcement tension device of the present invention to measure the support strength of the reinforcement, the perforated hole 104 together with the filler 105 in the field The ground reinforcement material 106 installed in the) is drawn out to measure the bearing force.

        The ground reinforcement 106 is inserted into the boring hole 104 installed on the inclined surface 101 and filled with the filler 105, and then the pressure plate 102 is installed on the inclined surface, and the ground reinforcement 106 is disposed at the fixing hole 103 of the pressure plate. Fixing wedge 40 having the hydraulic reinforcement 20 made up of the oil cylinder 24 and the outer cylinder 23 from the pressure plate to allow the ground reinforcement to penetrate through the ground reinforcement and the ground reinforcement fixing device 30. After firmly fixing and fixing the ground reinforcement by using a stepwise injection of a predetermined hydraulic force to the outer cylinder 23 of the hydraulic cylinder by a hydraulic pressure gauge, the oil cylinder 24 installed in front of the outer cylinder has a hydraulic force As it is introduced step by step, the ground reinforcement material is strongly fixed by the ground reinforcement fixing device 30 installed in the rear of the hydraulic cylinder step by step toward the front pressure plate (102). Since it is possible to receive the reaction force ground reinforcing material is to be determined whether the tension suitable for drilling holes is designed based on the force of the soil reinforcement member embedded with the filler 105 in 104. The

        6 is a view showing a tensile test of the ground reinforcement in the room using the ground reinforcement tension device of the present invention, the ground reinforcement fixing device 30 is installed in pairs of ground reinforcement fixing device 30 installed in pairs After installing the hydraulic cylinder 20 composed of the outer cylinder 23 and the oil cylinder 24 therebetween, it is installed through the ground reinforcement, and fixed in the ground reinforcement fixing device 30 installed before and after the hydraulic cylinder, respectively. After fixing and fixing the ground reinforcement to the wedge 40, the hydraulic cylinder is gradually injected to the hydraulic cylinder step by step so that the oil reinforcing material is drawn out at a predetermined interval in front of the hydraulic cylinder, so that the ground reinforcement is drawn out. At this time, by observing the hydraulic force injected into the hydraulic cylinder 20 by the instrument to test the tensile force of the ground reinforcement 106.

        In the case of a tensile test for steel pipes, plastic fiber reinforced pipes and vinyl pipes among the above ground reinforcement material, after inserting a steel rod or filler 107 into the inside of the pipe, the steel wires are fixed to the fixing wedge of the ground reinforcement fixing device. , Steel rods, vinyl pipes, steel pipes and glass fiber pipes, if all circular pipes and cross-section of the plastic is not circular, the fixing wedges to produce the projections 44 in the fixing wedge 40 to correspond to the shape and surface shape of the pipes When settled in (40), to be more firmly fixed.

        The present invention can develop a device that enables the tensile strength test for all kinds of ground reinforcement to check the quality of the ground reinforcement itself using this, and by carrying out the test of the bearing capacity for the ground reinforcement constructed in the field suitable for the design criteria It is an experimental method to make the construction effective by preventing the construction work by having the construction quality checking function to check whether or not.

Claims (7)

        Ground reinforcement tension device consisting of a hydraulic cylinder consisting of an oil cylinder formed with a through hole to penetrate the ground reinforcement in the center and an outer cylinder installed in contact with the oil cylinder, and a ground reinforcement fixing device for fixing and fixing the ground reinforcement by a fixing wedge. In         The ground reinforcing device fixing device is divided into upper and lower fixing plates which are divided up and down, and a conical wedge groove is formed in the upper and lower fixing plates, and after the fixing wedge is inserted into the wedge groove, bolts are inserted into the bolt holes of the upper and lower fixing plates. Ground reinforcement tension device characterized in that it is fixed to the installation.         The method of claim 1,         In the drawing test using the ground reinforcement tension device, a hydraulic cylinder composed of an outer cylinder and an oil cylinder is installed between a pair of ground reinforcement fixing devices, and the ground reinforcement is penetrated through the pair of ground reinforcement materials and the hydraulic cylinder. A hydraulic cylinder composed of an oil cylinder and an outer cylinder penetrates into the ground reinforcement material which is drawn indoors or inserted into the drilled hole of the inclined surface by using a, and the fixing wedge fixed in the ground reinforcement fixing device installed at the rear of the hydraulic cylinder is used. Ground reinforcement tension device characterized in that the fixed by fixing the ground reinforcement to draw by the hydraulic.         The method according to claim 1 or 2,         The interior of the fixing wedge is a ground reinforcing device tension device, characterized in that the grooves or protrusions such as the shape of the surface of the ground reinforcement is formed.         The method of claim 2,         The ground reinforcement material is a steel wire, steel bar, steel pipe, vinyl tube, glass fiber tube, plastic material tube, when the ground reinforcement material is a tube type ground reinforcement device characterized in that the steel rod or filler is inserted into the tube.         A method of measuring the bearing capacity of a slope reinforcement in which a ground reinforcement is inserted into a drilled hole provided on an inclined surface, filled with a filling material, and then a pressure plate is installed on the inclined surface, and the ground reinforcement is allowed to pass through the ground reinforcement in the anchor plate.         Allow the ground reinforcement to penetrate the hydraulic cylinder consisting of an oil cylinder and an outer cylinder from the pressure plate,         Using the fixing wedge fixed in the ground reinforcing material fixing device installed on the rear of the hydraulic cylinder to strongly fix the ground reinforcement,         While injecting constant hydraulic force into the outer cylinder of the hydraulic cylinder by means of hydraulic pressure step by step so that the oil cylinder installed in the first half of the outer cylinder to be advanced step by step toward the pressure plate in front of the ground reinforcement material,         The process of installing the ground reinforcement by removing the ground reinforcement penetrating through the pressure plate while removing the hydraulic cylinder and ground reinforcement fixing device by checking the tensile force by the gauge of the hydraulic force to confirm whether the design criteria and conformity. Tensile test method using the ground reinforcement tension device characterized in that made.         In the ground reinforcement tensile test method performed in the room,         Install a pair of ground reinforcement fixing devices, install a hydraulic cylinder consisting of an outer cylinder and an oil cylinder between the ground reinforcement fixing devices installed in pairs,         The ground reinforcement is installed through the pair of ground reinforcement and hydraulic cylinder,         Fixing and fixing the ground reinforcement to the fixing wedge mounted in the ground reinforcing material fixing device respectively installed before and after the hydraulic cylinder,         Step by injecting a certain hydraulic force to the hydraulic cylinder step by step to the oil cylinder installed in front of the hydraulic cylinder to move forward, at this time to observe the hydraulic force injected into the hydraulic cylinder by the instrument to check the tensile force of the ground reinforcement Tensile testing method using a ground reinforcement tension device characterized by consisting of a process.         The method according to claim 5 or 6,         The ground reinforcement material is a steel wire, steel bar, steel pipe, vinyl tube, glass fiber tube, plastic material pipe, when the ground reinforcement material in the form of a tube using a ground reinforcement tension device characterized in that the steel rod or filler is inserted into the tube Tensile test method.

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