KR20190055960A - Apparatus for pile load test - Google Patents

Abstract

The present invention relates to a pile static load test apparatus using a centralized radial bema member, and more specifically, to a pile static load test apparatus, which is possible to test static load of a test pile and a peripheral pile while lateral direction displacement isn′t generated by using a centralized radial beam member.

Description

[0001] Apparatus for pile load test [0002]

More particularly, the present invention relates to a pile pendulum test apparatus using a centralized radial type beam member, and more particularly, to a pile pendulum test apparatus using a centralized radial pile member, ≪ / RTI >

Generally, the ground where civil engineering and architectural structures are to be installed should support the ground sufficiently for the structural loads.

However, when the bearing capacity of the supported ground is relatively weak compared to the structure load, the pile is usually installed in the ground by the ground reinforcement method, and the upper structure load is transmitted to the hard layer such as the rock through the pile or surrounding the pile Design and construction to transfer the load to adjacent ground.

In other words, the structure of the stratum and the samples of each stratum were sampled through the ground survey, and the physical or mechanical design parameters of the ground were measured through the room test. Using the data, the pile was constructed by using the static bearing capacity formula or the empirical formula. Calculate the ultimate bearing capacity.

The purpose of this paper is to investigate the safety of pile foundation construction by carrying out a compression (vertical) load test on pile foundations and comparing the bearing capacity with design load.

The load test is to load the load of 2 ~ 3 times the design load on the head of the pile after the pile is installed. The loading method is to load the concrete block, steel bar, rail, (Continuous load, continuous load), rapid loading, and rapid loading in accordance with the test methods such as loading and unloading method of load, Uniform speed and repetitive load test, etc., and it takes much time and cost to load the load device, to load and remove the load.

Typical load tests include static and dynamic tests.

In the static test, a hydraulic jack is installed on a pile, a load device is placed on a hydraulic jack, and a load is measured while a load is applied. In the dynamic load test, a gage is installed on a pile. When a pile is hit with a hammer, the repulsive force is measured by a computer.

The advantage of the stationary test is that it allows relatively accurate testing, but it has a drawback that it takes a long time.

In addition, the structure of the permanent test frame is inconvenient and vulnerable to connection and installation, and the result of the test is difficult to be considered as the bearing capacity of the pure test pile. In other words, the test frame of the reaction force pile method is composed of two pairs of four or six reaction force piles located at the same distance centered on the test pile and connected to each other by a connecting beam, Hydraulic jack and load cell are installed on the lower part of the girder beam and the upper surface of the test pile. When the load due to the extension of the hydraulic jack is supported on the girder beam, the load is transferred to the test pile. I have. In the above experiment, the connection between the connecting beam and the reaction force pile should be firm. However, conventionally, the connecting rod is connected by one or two round rods and the length thereof is long, so tensile deformation of the round rods may occur.

In addition, the above-mentioned stationary test apparatus has a disadvantage in that it is not large in size and heavy in weight due to difficulty in transportation and storage, and requires a large crane such as heavy equipment in installation.

Registered Utility Model No. 20-286390

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems of the prior art, and it is an object of the present invention to provide a structure in which a coupling structure between parts constituting a stationary test apparatus can be easily and firmly assembled, To minimize the deformation caused by other parts when the load is applied, and to improve the reliability of the resultant value.

In order to accomplish the above object, the present invention provides a stationary test apparatus comprising: a pillar member mounted on a test pile; a beam member facing outward from a center of the pillar member and fastened to a plurality of surrounding piles; And a pneumatic jack mounted on the lower test pile of the pillar to grasp the pile permissible supporting force, characterized by having a wire rope connected centrally, a fixing member fitted to a fixing plate fitted to the pile, do.

The test apparatus for the stationary test according to the present invention tests the allowable bearing capacity of the pile using a hydraulic jack after fixing the test pile and peripheral pile to the outer member of the pillar member and the outer member of the pillar member and the fixing member to the pillar member, The test apparatus is simplified, and the traction device is constructed as a prefabricated assembly used in the field, so that it is easy to carry and store.

In addition, the present invention has the effect of not interfering with the arrangement of the piles installed at all, since the beam member is fixed radially to the pillar member to grasp the allowable supporting force.

1 is a general schematic view of a load test apparatus according to the present invention;
FIG. 2 is a schematic view showing a state where a beam member and a peripheral pile according to the present invention are combined.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

FIG. 1 is a general schematic view of a load test apparatus according to the present invention, and FIG. 2 is a schematic view of a state where a beam member and a peripheral pile according to the present invention are combined.

First, referring to FIG. 1 to FIG. 2, a device for testing a pile suspension using a centralized radial type beam member according to a first embodiment of the present invention will be described.

As shown in FIGS. 1 and 2, the apparatus for testing pendulum pavement using a centralized radial beam member according to the first embodiment of the present invention includes a pillar member 100 of a cylindrical shape raised on a test pile, And a beam member 102 mounted on a lower end of the member 100. The beam member 102 includes a housing 104 fitted to a fixing bar 110 radially formed on a pillar member, And a fixing member 106 which is vertically movably coupled to one side of the fixing member 106. The fixing member 106 is fixed to peripheral piles.

In the lower end of the column member 100, a bar type fixing bar 110 is formed radially from the center to the outer side so that the housing 104 formed on both sides of the beam member is fitted, .

The beam member coupled to the column member has a cross section of the same shape as the H beam and has a long housing 104 formed at the center in the longitudinal direction so as to be fitted into the fixing bar 110.

The joining of the beam member and the fixing bar is performed by drilling a groove in the same position of the fixing bar and the housing and fixing the groove with a bolt and a nut in the groove so as to radially couple the beam member and selectively selecting a fixing bar according to the position of the surrounding pile .

The pillar member 100 and the beam member 102 are fixed in two steps using a wire rope 200 in the same manner as an umbrella shape so that the beam member is parallel and joined to the fixed bar So that the beam member can be pulled together when towed.

The other side of the beam member is fitted in the housing so that the fixing member 106 can be moved up and down. The upper end of the fixing member is engaged with the pedestal 112, and in a state where the fixing member is inserted into the housing, So that it can be fixed.

The lower end of the fixing member coupled to the beam member is coupled to the fixing plate 120 fixed to the surrounding piles so that when the beam member is lifted up, the fixing plate coupled to the fixing member is lifted together to check the allowable supporting force.

The wire rope 200 fastened to the fixing member and the beam member can be assembled and disassembled by forming a hook at both ends of the strand by using a stranded wire so as to be combined with the fixing member and the beam member to facilitate transportation and storage On the other hand, since the volume and weight are relatively small, it is easy to carry and store.

The present invention is capable of traction using a ground anchor in addition to a pile file constructed in the past.

The pile testing method of the present invention and the operation of the pile testing apparatus will be described in detail with reference to the drawings.

In the present invention, the test apparatus is stored and transported in a disassembled state. After the test apparatus is transported to the test site, the hydraulic jack is placed on the test file, and the column member is placed on the hydraulic jack.

After the beam member is inserted into the lower end of the column member and further fixed using a wire rope, the fixing member is fitted to the beam member, and then the fixing member is fixed to the surrounding pile.

In this state, when the hydraulic jack is operated, the load due to the elongation of the hydraulic jack is supported by the surrounding pile, and the load is transmitted to the test pile, so that the hydraulic jack can perform the test by adding the static load to the test pile.

As described above, the pile test method and apparatus using the pillar member and the beam member of the present invention are described in the above description and drawings, but the present invention is not limited to the above description and drawings And it is to be understood that various changes and modifications may be made without departing from the spirit of the invention.

100: 102:

Claims (4)

And a beam member (102) mounted on a lower end of the column member (100), wherein the beam member (102) is fixed to a column member A housing 104 fitted to the bar 110 and a fixing member 106 coupled to the housing 104 so as to be vertically movable, wherein the fixing member is fixed to the peripheral pile A pile - bed testing system using centralized radial beam members. [2] The apparatus according to claim 1, wherein a bar type fixing bar (110) is radially formed at the lower end of the column member (100) from the center to an outer side, and a housing (104) And the beam member is coupled with the pile depending on the position of the surrounding pile so as to fit into the bar 110. [ The column member (100) according to claim 1, wherein the column member (100) and the beam member (102) are further fixed by using a wire rope (200) And the fixing member is fixed to the fixing groove by inserting a groove in the fixing groove and the housing and fixing the fixing groove with the bolt and the nut in the groove, So that the fixed bar is selectively coupled according to the position of the surrounding pile. The apparatus for testing a pile suspension using a centralized radial beam member. [3] The apparatus of claim 1, wherein the fixing member is movable up and down in the housing, and the upper end of the fixing member is engaged with the pedestal to fix the fixing member in a state of being protruded downward The lower end of the fixing member is engaged with the fixing plate 120 fixed to the surrounding pile, and when the beam member is lifted up, the fixing plate coupled to the fixing member is lifted together with the supporting force, Wherein the piles are fixed to the piles by means of a centralized radial beam member.

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