KR200331520Y1 - The Grouted Bored pile and Structure of Erecton reinforcing bar - Google Patents

Abstract

The present invention is used in the method of grouting the contact surface of the main surface and the tip of the site casting pile in order to reinforce the frictional force of the main surface of the circumferential side of the bored pile and the supporting force of the tip of the base. It relates to a rebar network assembly structure for piles.

The structure of the reinforcing steel bar assembly structure for the cast-in-place pile of the present invention includes a reinforcing steel bar structure consisting of a cast iron and a band reinforcing bar and a main surface spacer; A packer injection device consisting of a round manjet tube connected to the reinforcing bar network structure by a T-shaped connector and a packer injection pipe is integrally assembled.

Description

The Grouted Bored pile and Structure of Erecton reinforcing bar}

The present invention grouts the contact surface of the main surface and the tip of the string pile to reinforce the frictional force of the main surface, which is the outer circumferential side of the bored pile, It relates to a reinforcing bar reinforcing bar assembly structure to be used in the method.

The general construction sequence of the string pile is excavated to a certain depth by using auger, bucket or hammer grab, etc., and the assembled reinforcing bar network structure is inserted into the excavated excavation hole wall, The concrete is poured through the tremie pipe.

At this time, the excavated excavation walls have loosened side and ground around the excavated excavation walls due to the relaxation of stress in the excavation walls sidewalls and the influence of infiltration water. In addition, due to the swelling (swelling) by the removal of the upper load and the incomplete treatment of the deposited soil (Slime) during excavation, various problems such as a decrease in bearing capacity of the tip or settlement of excessive tip are generated.

The present invention is to solve the above problems generated during the construction of the suspension pile, to solve the deterioration of the frictional force of the main surface of the suspension pile and the supporting force of the tip portion, and further used in the grouting method for increasing the friction and bearing power It is an object of the present invention to provide a reinforcing bar network assembly structure (hereinafter referred to as a 'stack pile structure'), in which a packer injection device is integrally assembled to a reinforcing steel structure.

The construction method of the suspension pile according to the present invention is to insert the structure for the suspension pile installed with the packer injection device in the reinforcing bar structure into the excavation hole wall, and then the concrete is poured, and the injection liquid as a reinforcing agent (hereinafter ' The purpose of the present invention is to improve the bearing capacity of the suspension pile by injecting the injection liquid.

The injection timing of the injection liquid is determined according to the relaxation of the stress on the side surface of the excavation wall and the incomplete treatment of the soil deposited on the penetration water and the bottom surface of the excavation wall.

The injection liquid is a kind of reinforcing agent for increasing the frictional force of the main surface portion and the supporting force of the tip portion, and cement and the like can be used without being limited to the chemical liquid.

The construction method of the suspension pile of the present invention is the same as the construction method of the conventional suspension pile, but the present invention uses the structure of the suspension pile, in which the packer injection device is integrally assembled to the reinforcing steel structure, and the injection liquid is injected through the packer injection device. It is characterized in that the process of injecting is added.

The structure for the suspension pile is a case in which the packer injection device of the present invention is integrally assembled with the spacer of the main surface portion of the reinforcing steel network structure of FIG. The packer injection device of the present invention is integrally assembled to the outer periphery and the main surface spacer of the rebar network structure of FIG. 4, and the packer injection device of the present invention is integrally assembled to the outer periphery of the rebar network structure of FIG. 5. Can be distinguished.

In addition, even if the case is not the case of the main surface portion injection manganese tube (manchettetube) is connected by the T-shaped connector connected to the packer injection pipe of the packer injection device of the depth of the ground required to strengthen the ground to increase the frictional force of the main surface portion Depending on the number of installation can be installed.

When the main mandrel injection mandrel tube is installed in the spacer part of the reinforcement network structure, in principle, the reinforcement network structure and the main part is installed in the inner space formed by the main spacer, but the main surface of the reinforcing network structure If not installed in the secondary spacer is installed on the outer periphery of the reinforcing bar network structure, the tip mandrel injection mandrel tube is installed at the tip of the reinforcing bar network structure.

The packer injection device comprises a packer injection pipe; A circular mandrel tube for main surface injection; A round manjet tube for tip injection; The packer injection pipe, the main surface portion circular mandrel tube for injection and the tip portion of the circular mandrel tube for connecting the injection is integrally assembled and coupled by.

Then, insert the structure for the suspension pile configured as described above into the excavation hole wall and after pouring concrete, the injection liquid supplied by the packer injection device in accordance with the injection timing of the injection liquid through the packer injection pipe, the circular manjet for injection From the tube is injected into the mandrel round mandrel tube sequentially injected to the mandrel round mandrel tube closest to the ground.

1A is a cross-sectional view of a rebar network structure.

1B is a sectional view taken along the line A-A 'in FIG. 1A;

1C is a cross-sectional view of B-B 'of FIG. 1A, showing a detail of the tip reinforcing steel network structure.

2 is a schematic view of a packer injection device of the present invention.

Figure 3 is a schematic view of the reinforcing bar network assembly structure for the site-casting pile is integrally assembled with the device for the packer injection of the present invention to the main surface spacer of the reinforcing steel network structure.

Figure 4 is a schematic diagram of the reinforcing bar network assembly structure for the site-pouring piles integrally assembled on the outer peripheral edge and the main surface portion spacer of the reinforcing bar network structure of the present invention.

Figure 5 is a schematic diagram of the reinforcing bar network assembly structure for the site-casting piles integrally assembled on the outer periphery of the reinforcing steel structure structure of the present invention.

FIG. 6 is a schematic detail view of a reinforcing bar assembly structure for a site-pouring pile, in which a device for packer injection is assembled into a spacer of a main surface portion of a reinforcing bar structure inserted into an excavation hole wall; FIG.

FIG. 7 is a schematic detail view of a reinforcing bar assembly structure for site-casting piles in which a device for packer injection is assembled on the outer circumference of the reinforcing bar structure inserted into the excavation hole wall; FIG.

Figure 8a is a schematic use state of the main mandrel injection mandrel tube

Figure 8b is a schematic use state of the tip end circular mandrel tube of the present invention

Figure 9a is a detailed view of the connection of the pipe pipe for the injection of the mandrel round mandrel tube for the main surface

Figure 9b is a detailed view of the connection of the pipe pipe for injection and the circular mandrel tube for tip injection of the present invention

Figure 10a is a detailed cross-sectional view of the circular mandrel tube for tip injection of the present invention

Figure 10b is a detailed cross-sectional view of the circular mandrel tube for injection of the main surface of the present invention

* Explanation of symbols for main parts of the drawing

1: cast iron 2: band steel

3: main surface part spacer 4: space part

5: Reinforcing bar structure 6: Packer injection device

7: Packer injection pipe 8: Round manjet tube for main surface injection

9: round mandrel tube for tip injection 10: T-shaped connector

11: injection hole 12: excavation wall

Preferred embodiments of the present invention by more clearly described with reference to the accompanying drawings.

Figure 1a is a cross-sectional view of the reinforcing bar network structure, the outer periphery of the reinforcing bar network structure 5 inserted vertically in the excavation hole wall 12, the main surface portion spacer 3 is required to reinforce the friction force from the upper end to the lower end Installed; The main surface portion spacer 3 installed on the outer periphery of the reinforcing bar network structure 5 may vary in number depending on the length of the reinforcing bar network structure 5, and in particular, the ground reinforcement for increasing the frictional force of the main surface of the string pile Depending on the location of the required depth may be installed by varying the number of installation.

For reference, FIG. 1B is a cross-sectional view of A-A 'of the cross-sectional view of the rebar network structure of FIG. 1A, and FIG. 1C is a cross-sectional view of B-B' of FIG. 1A.

2 shows a schematic view of a packer injection device of the present invention, wherein the packer injection device 6 includes a packer injection pipe 7 serving as a passage for injecting injection liquid; Circular mandrel tube for injection of the main surface portion which is connected to the packer injection pipe (7) is installed on the outer periphery of the reinforcing bar network structure (5) in accordance with the position of the depth of the ground required to increase the frictional force of the main surface portion of the string pile (8); A round mandrel tube (9) for injecting a tip portion which is connected to the packer injection pipe (7) and is installed below the tip portion of the reinforcing bar network structure (5) to reinforce the support of the tip of the suspension pile; It consists of a T-shaped connector 10 for connecting the packer injection pipe (7), the main mandrel injection circular mandrel tube (8) and the distal end injection mandrel tube (9).

3 is a schematic view of the reinforcing bar network assembly structure for the cast-in-place pile in which the packer injection device of the present invention is integrally assembled to the spacer of the main surface portion of the reinforcing bar network structure, Figure 4 5 is a schematic view of a reinforcing bar reinforcing bar assembly structure in which the device for packer injection of the invention is assembled integrally, Figure 5 is a reinforcing bar for the reinforcement for the field pouring pile integrated in the outer periphery of the reinforcing bar structure Schematic diagram of a network assembly structure.

As shown in FIG. 3, when the main mandrel for injection of the main surface portion 8 is installed in the main spacer portion 3 of the reinforcing mesh structure 5, in principle, the main surface portion spacer 3 is disposed in the reinforcing mesh structure 5. A circular mandrel tube 8 for injection of the main surface portion is installed in the inner space portion 4 formed by the assembly of the main body portion, but the main surface portion of the main surface portion spacer 3 of the reinforcing mesh structure 5 as in the case of FIG. When the injection mantle tube 8 for injection is not installed, the main mandrel injection mandrel tube 8 is installed on the outer circumference of the reinforcing bar structure 5, and the mandrel injection mandrel tube 9 for the tip portion is reinforced It is provided below the front-end | tip part of the structure 5, and the packer injection pipe 7 is provided in the inside of the reinforcing steel network structure 5.

FIG. 6 is a schematic detailed view of a reinforcing steel mesh assembly structure for a site-pouring pile in which a device for injecting packers is assembled in a spacer of a main surface portion of a reinforcing steel mesh structure inserted into a digging hole wall. The main surface spacer (3) is provided on the outer periphery of the (), and the main manganese tube (8) for main surface injection, which is installed in the packer injection pipe (6), is connected to the rebar network structure (5) It is bound in the form of a circle between the space (4) formed by the, the packer injection pipe 6 and the main manganese tube 8 for injection of the main surface portion is connected by a T-shaped connector (10).

For reference, FIG. 7 is a schematic detailed view of a reinforcing bar assembly structure for site-placement piles in which a packer injection device is assembled on the outer circumference of the reinforcing bar structure inserted into the excavation hole wall.

Figure 8a is a schematic use state diagram of the main manganese injection circular mandrel tube of the present invention, Figure 8b is a schematic use state diagram of the mandrel injection circular mandrel tube of the present invention, the main mandrel injection circular mandrel tube (8) and tip injection The mandrel tube 9 is provided with a plurality of injection holes 11 at regular intervals so that the injection liquid can be injected into the main surface portion and the tip of the suspension pile, and the injection hole 11 requires injection of the injection liquid. It should be arranged in order to select the direction, the circular mandrel tube 8 for injection of the main surface portion is formed so as to be selectively injected into the soft ground on the side of the excavating hole wall passing through the main surface portion of the string pile in the direction of the arrow In the case of the bottom mandrel injection mandrel tube (9) is formed so as to be selectively injected into the bottom ground of the excavation hole wall through the tip of the string pile in the direction of the arrow The.

The injection holes 11 formed in the main mandrel injection section 8 and the bottom mandrel injection mandrel tube 9 are perforated with a diameter of 5 mm at intervals of about 20 cm, and the injection holes 11 are made of rubber. When the injection pressure is applied by covering the band (unsubstrate), the rubber band is opened to inject the injection liquid, and when the pressure of the injection liquid is removed, the rubber band is closed, and the injection liquid is injected into the main mandrel tube (8) The rubber band covered in the injection hole 11 so as not to flow into the circular mandrel tube 9 for injection serves as a no return valve.

9A and 9B are detailed views of the connection of the main mandrel injection mandrel tube and the packer injection pipe of the present invention, Figure 9b is a detailed view of the connection of the mandrel injection manganese tube and the piper injection pipe of the present invention, In the case of FIG. 9A, the circular manjet tube 8 for injection of the main surface portion installed on the outer circumference of the reinforcing bar network structure 5 is horizontally connected by the packer injection pipe 7 and the T-shaped connector 10, and FIG. 9B. In the case of the tip mandrel injection mandrel tube 9 is installed at the top end of the reinforcing bar network structure 5 is connected to the packer injection pipe 7 in the vertical form by the T-shaped connector (10). For reference, Figures 10a and 10b is a detailed cross-sectional view of the circular mandrel tube for dispensing the tip of the present invention, Figure 10b is a detailed cross-sectional view of the circular mandrel tube for injection of the main surface of the present invention.

The construction method of the suspension pile according to the present invention is constructed according to the construction method of the conventional suspension pile using the structure for the suspension pile manufactured according to the above contents, and the frictional force and the tip end of the main surface of the suspension pile are injected by injecting the injection liquid. In order to increase the bearing capacity, the process of injecting the injection liquid is added as follows, and the construction method of the suspension pile is as follows.

A conventional method for constructing a suspension pile, the method comprising: installing a packer injection device (6) in a reinforcing bar network structure (5) used in a conventional suspension pile construction method;

Packer in the packer injection pipe 7 of the packer injection device 6 Inserting an injection device;

The packer injection device is fixed to the packer injection device about 10 cm from the tip of the reinforcing bar manganese tube 9 to the injection liquid injected into the packer injection pipe 7 by using the packer injection device. Spraying step;

Step by step packer Pulling up the injection mechanism and sequentially fixing the packer injection mechanism at an upper portion of about 10 cm from the circular manjet tube 8 for injection of the main surface and then spraying the main surface;

In this case, the depth of installation of the main mandrel injection mandrel tube 8 and the end mandrel injection mandrel tube 9 is accurately determined when the reinforcing bar structure 5 is installed. By displaying the injection is possible by the injection in the correct position, the injection pressure is convenient to adjust the magnitude of the pressure in accordance with the configuration, depth of the strata.

In recent years, pile foundation type tends to be more widely adopted than pile piles due to large diameter hardening, pile vibration, and noise regulation.However, this method is based on the lowering of the frictional force of the main surface of the pile and the tip of the string pile. Various problems are generated, such as reduced bearing capacity or excessive tip settlement.

The present invention follows the conventional construction method of the stringer pile by using the packer injection method applied to the stringer pile and the structure of the stringer pile used therein, but by adopting the additional packer injection method, the frictional force of the main surface of the stringer pile and the bearing capacity of the tip end portion thereof are adopted. It is a process that is expected to increase further.

Claims (4)

A reinforcing bar network structure (5) consisting of a main reinforcing bar (1), a band reinforcing bar (2), and a main surface spacer (3); A packer injection pipe 7 serving as a passage for injecting the injection liquid into the reinforcing bar network structure 5; Circular mandrel tube for injection of the main surface portion which is connected to the packer injection pipe (7) is installed on the outer periphery of the reinforcing bar network structure (5) in accordance with the position of the depth of the ground required to increase the frictional force of the main surface portion of the string pile (8); A round mandrel tube (9) for injecting a tip portion which is connected to the packer injection pipe (7) and is installed below the tip portion of the reinforcing bar network structure (5) to reinforce the support of the tip of the suspension pile; Reinforcement net for field-casting piles, characterized in that consisting of the T-shaped connector 10 for connecting the packer injection pipe 7 and the main manipulator circular mandrel tube 8 and the distal end mandrel mandrel tube 9 Assembly structure. The method according to claim 1, wherein the main mandrel injection mandrel tube 8 and the mandrel injection mandrel tube 9 is a plurality of injection holes 11 at regular intervals so that the injection liquid is injected to the main surface portion and the tip portion of the suspension pile Reinforcing bar network assembly structure for the cast-in-place pile, characterized in that is formed. 3. The injection hole 11 formed in the main mandrel injection mandrel tube 8 and the bottom mandrel injection mandrel tube 9 is covered with a rubber band so that the rubber band is opened when the injection pressure is applied. When the injection liquid is injected and the pressure of the injection liquid is removed, the rubber band is closed so that the injection liquid injected once is not injected into the main mandrel injection mandrel tube 8 and the tip injection mandrel tube 9. 11) Reinforcing bar network assembly structure for cast-in-place pile, characterized in that the rubber band covered in the) serves as a non-return valve (No return valve) The injection hole (11) of the circular mandrel tube (8) for injection of the main surface portion is selectively injected into the side ground of the excavation hole wall by passing through the main surface portion of the suspension pile in the direction of the arrow. It is formed to be, the injection hole 11 of the bottom manipulator tube for injection bottom 9 is characterized in that it is formed to be selectively injected into the ground of the bottom of the excavation hole wall through the tip of the suspension pile in the direction of the arrow Reinforcing bar network assembly structure for cast-in-place piles.