JP6513502B2 - Pile body construction method - Google Patents

Description

  The present invention relates to a pile body construction method.

  Conventionally, cast-in-place and pre-made pile methods have been proposed as pile body construction methods for constructing a pile body on the ground. In the cast-in-place pile method, a pile hole is excavated in the ground using a screw or the like, a casing is built in the upper part of the pile hole, and then cylindrical reinforcing bar is piled up so that the position and inclination are adjusted by the casing. Finally, the concrete is filled inside the pile hole so as to cover the reinforcing bar (see, for example, Patent Document 1).

  In the ready-made pile method, the ground was excavated while pouring the circumferential fixing solution or rooting solution from the tip of the drilling head to form a pile hole, and finally, the circumferential fixing solution and the rooting solution were injected. This is a method of inserting a prefabricated pile into a pile hole. According to this prefabricated pile method, compared with the cast-in-place pile method, work on the site can be omitted, and it is possible to construct a pile body in a shorter time than in the cast-in-place pile method.

JP 2007-224657 A

  Here, in the conventional cast-in-place or prefabricated pile method, after the pile body is formed in the ground, fine adjustment of the accuracy of the pile body is performed by moving the pile body itself to adjust the position and inclination. Was difficult. That is, in the cast-in-place pile method, concrete is filled in the entire pile hole and solidified to form a pile body, so there is no gap for moving the pile body between the pile body and the pile hole, and the pile body is moved I could not do anything. In addition, in the ready-made pile method, in order to adjust the position and inclination of the pile body, it is necessary to attach a jack (mechanical jack, liquid-operated jack, etc.) from the inner surface of the pile hole to the outer surface of the ready-made pile. However, in the above-described conventional ready-made pile system, as described above, since the circumferential fixing liquid and the rooting liquid are injected into the inside of the pile hole, when a jack is disposed inside such a pile hole, The jack may be damaged. Furthermore, since the inner surface of the pile hole is a simple ground, it was difficult to maintain sufficient strength for attaching the jack. Therefore, when moving a ready-made pile for the purpose of adjusting the position and inclination of a column to be joined to a ready-made pile or a ready-made pile, a portion of the pile head of the ready-made pile that protrudes upward from the construction surface is It takes time and effort, for example, to move and to adjust by assembling and moving a jack next to the projecting part. In addition, in the case of a structure in which the pile head of the already made pile does not protrude above the construction surface (for example, in the case of connecting the steel pillar to the pile head of the already made pile in the reverse operation method) It was not possible to adopt the prefabricated pile method because

  The present invention has been made in view of the above, and in the ready-made pile system, a pile body (corresponding to the above-mentioned "ready-made pile") or a bonded body (corresponding to the above-mentioned "pillar joined to the ready-made pile") It is possible to adjust the position and the inclination of the pile easily, and provide the pile construction method that can adjust the above even if the pile head of the pile does not protrude above the construction surface. The purpose is to

In order to solve the problems described above and to achieve the object, the pile body construction method according to claim 1 comprises a pile hole forming step of forming a pile hole along a vertically downward direction from a construction surface; In a pile inserting step for inserting a pile, an outer peripheral surface of the pile, or an outer peripheral surface of a joined body joined to the pile, a bag shape at a position facing the inner peripheral surface of the pile hole A bag-like body installation step of installing the body, and injecting the injection material into the bag-like body and pressing the pile body or the joint body by the injection material to position or tilt the pile body or the joint body look including a an adjustment step of adjusting the said pile head of the pile body is positioned below the working surface, at least a portion of the joint body is located above said construction surface, the In the adjustment step, the injection material is injected into the bag-like body and the joined body is pressed by the injection material. And it allows to adjust the position or inclination of the pile body or the conjugate.

The pile body construction method according to claim 2 comprises a pile hole forming step of forming a pile hole along a vertically downward direction from a construction surface , a pile body insertion step of inserting a pile body into the pile hole, and the pile body A bag-like body installing step of installing a bag-like body at a position facing the inner peripheral surface of the pile hole among the outer peripheral surface of the outer body or the outer peripheral surface of the joined body joined to the pile; Adjusting the position or inclination of the pile body or the joint body by injecting the injection material into the body and pressing the pile body or the joint body by the injection material; and the bag-like body In the installation step, a plurality of the bag-like bodies are installed at a plurality of locations around the pile body or the joined body.

  The pile body construction method according to claim 3 is the pile body construction method according to claim 1 or 2, wherein the bag-like body is opposed to the inner peripheral surface of the pile hole in the outer peripheral surface of the pile body. Install at the highest position of the position.

  The pile body construction method according to claim 4 is the pile body construction method according to any one of claims 1 to 3, wherein the joined body is a column joined to a pile head of the pile body .

  The pile body construction method according to claim 5 is the pile body construction method according to any one of claims 1 to 4, wherein the injection material is cement milk.

According to the pile construction method of claim 1, the position or inclination of the pile or joint is adjusted by injecting the injection material into the bag-like body installed in the pile, so that in the ready-made pile system, the pile The position and the inclination of the body or the joint can be easily adjusted, and the above adjustment can be performed even when the pile head of the pile does not protrude above the construction surface.
In addition, by injecting the injection material into the bag-like body and pressing the joined body with the injected material, the position or inclination of the pile body or the joined body is adjusted, so the pile body is positioned below the construction surface Even if it is not possible to visually recognize from the outside because of this, it is possible to adjust the position or inclination of the pile or the joint.

According to the pile body construction method according to claim 2, since the position or inclination of the pile body or the joint body is adjusted by injecting the injection material into the bag-like body installed in the pile body, in the ready-made pile system, the pile The position and the inclination of the body or the joint can be easily adjusted, and the above adjustment can be performed even when the pile head of the pile does not protrude above the construction surface.

  According to the pile construction method of claim 3, since the bag-like body is installed at the highest position of the positions facing the inner peripheral surface of the pile hole on the outer peripheral surface of the pile, Adjustment can be performed at a position closest to a pillar or the like installed on the pile head, and the accuracy of adjustment can be improved.

  According to the pile construction method of claim 4, since the joined body is a column joined to the pile head of the pile, the accuracy of the position and inclination of the pillar joined to the pile is improved. It will be possible to

  According to the pile construction method of claim 5, since the injection material is cement milk, the bag-like body can be buried in the inside of the pile hole and the bag-like body can be removed to the outside of the pile body. It is possible to reduce time and money.

It is sectional drawing which shows the foundation structure constructed by the pile body construction method which concerns on embodiment of this invention. It is sectional drawing which shows the foundation structure constructed in the procedure 1 of the pile-body construction method which concerns on embodiment of this invention. It is sectional drawing which shows the foundation structure constructed in the procedure 2 of the pile body construction method. It is an enlarged view of the A section of FIG. It is sectional drawing which shows the foundation structure constructed in the procedure 3 of the pile body construction method. It is an enlarged view of the B section of FIG. It is sectional drawing which shows the foundation structure which concerns on a modification.

  Hereinafter, with reference to the accompanying drawings, an embodiment of a pile installation method according to the present invention will be described in detail. First, the basic concept of the [I] embodiment will be described, then the specific contents of the [II] embodiment will be described, and finally, modifications to the [III] embodiment will be described. However, the present invention is not limited by the embodiments.

[I] Basic Concept of the Embodiment First, the basic concept of the embodiment will be described. The present embodiment relates to a pile body construction method for constructing a pile body. This pile body is a pile formed in the ground which becomes a foundation of a building. In addition, the use of the building constructed using this pile body is arbitrary, for example, can be utilized as an office building, eating and drinking facilities, an entertainment facility, or a residence facility. In addition, the total number of floors and the shape of the building are optional.

[II] Specific Content of the Embodiment Next, the specific content of the embodiment will be described.

(Constitution)
FIG. 1: is sectional drawing which shows the foundation structure 1 constructed by the pile-body construction method which concerns on this Embodiment. As shown in FIG. 1, the foundation structure 1 according to the present embodiment includes a pile hole 10, a pile body 20, a root consolidation portion 30, a pile circumferential fixing portion 40, a bag-like body 50, and a column 60. It is configured. Here, in the following, as necessary, the XX ′ direction in FIGS. 1 and 2 is referred to as “width direction”, and in particular, the X direction is referred to as “right direction” and the X ′ direction is referred to as “left direction”. . Also, the YY ′ direction (direction orthogonal to the XZ plane) is referred to as “depth direction”, and in particular, the Y direction (direction toward the front) is referred to as “front direction”, Y ′ direction (direction toward the back) ) Is referred to as "rearward direction". Further, the ZZ ′ direction is referred to as “height direction”, and in particular, the Z direction is referred to as “upward”, and the Z ′ direction is referred to as “downward”. Further, with reference to each part of the foundation structure 1, the one approaching the center of the foundation structure 1 will be referred to as "inside", and the one going away from the center of the foundation structure 1 will be referred to as "outside".

  Here, in order to construct a building, the foundation structure 1 according to the present embodiment is constructed at a plurality of locations with respect to the ground 2, but each foundation structure 1 has a similar structure, and the same In the present embodiment, only one of the plurality of foundation structures 1 will be described focusing attention on the construction.

(Configuration-pile hole)
The pile hole 10 is a hole for inserting the pile body 20, and is formed along the vertically downward direction from the construction surface. Here, the “construction surface” is a surface at the same level as the point at which the excavation of the pile hole 10 is started. For example, in the case where heavy machinery and the like are disposed on the ground surface and excavation of the pile hole 10 is started from the ground surface, the ground surface is the construction surface. Alternatively, when digging from the ground surface by a predetermined height (for example, 1 m) and placing heavy machinery etc. at the dug point and starting digging, a surface at the same level as the dug point is the construction surface. The specific shape of the pile hole 10 is arbitrary, and in the present embodiment, is a cylindrical hole, but in order to improve the support performance of the pile body 20, the bottom portion of the pile hole 10 ( It is preferable to carry out expansion drilling of the part in which the rooting part 30 is located. In addition, although the size of this pile hole 10 is arbitrary as long as the pile body 20 and the bag-like body 50 can be inserted into the inside, the larger the diameter of the pile hole 10, the larger the positional deviation and inclination of the pile hole 10 Even if this is the case, the pile body 20 can be installed at the correct position. However, if the diameter of the pile hole 10 is too large, the bag-like body 50 installed between the pile body 20 and the pile hole 10 also needs to be enlarged accordingly, so that it is preferable to set the size appropriately. In the embodiment, the clearance between the pile hole 10 and the pile body 20 is formed to be about 100 mm to 150 mm. Although a cylindrical steel pipe may be disposed to abut on the inner peripheral surface of the pile hole 10, such a steel pipe is not provided in the present embodiment.

(Composition-pile body)
The pile body 20 is a structure inserted into the pile hole 10, and is disposed inside the pile hole 10 along the vertical direction. The pile body 20 is disposed inside the pile hole 10 so as to be surrounded by the rooting portion 30 and the pile circumferential fixing portion 40. Specifically, the shaft center of the pile hole 10 and the shaft center of the pile body 20 are disposed so as to substantially coincide with each other, the pile head of the pile body 20 is positioned substantially on the same plane as the construction surface, The pile bottom of the body 20 is located above the bottom of the pile hole 10.

  Here, the pile body 20 is typically a known steel pipe pile, a PHC pile, a PRC pile, or a prefabricated pile such as a SC pile, but not limited thereto, various known prefabricated piles can be applied. . For example, in the present embodiment, the pile body 20 is a prefabricated pile formed by filling concrete into the inside of a steel pipe serving as an outer shell, but main bars arranged in the vertical direction, You may comprise and comprise the hoop reinforcement arranged so that the said main reinforcement may be covered, and the column-shaped concrete formed so that these main reinforcement and a hoop reinforcement might be covered.

(Structure-Rooting section)
The rooting portion 30 is a bottom fixing means for fixing the bottom of the pile 20. The rooting portion 30 is for improving the support performance of the pile 20, and is a cement-hardened body formed so as to cover the bottom of the pile 20 at the position of the bottom of the pile hole 10. That is, the rooting portion 30 is a cement-hardened body having a substantially cylindrical shape concave in cross section, and is formed in such a shape that the bottom portion of the pile 20 fits in the recess formed at the upper end without a gap. The formation method of this rooting part 30 is arbitrary, for example, pours the rooting liquid 31 (refer FIG. 2 mentioned later) which is cement milk into the inside of the pile hole 10, and drops the pile body 20 in the rooting liquid 31 concerned. It can be formed by curing the rooting liquid 31 in a soldered state. The mixing ratio of water and cement of the rooting liquid 31 is arbitrary, and known values can be applied.

(Configuration-Pile circumference fixed part)
The pile peripheral fixing portion 40 is a peripheral fixing means for fixing the periphery of the pile 20. The pile periphery fixing portion 40 is a cement-hardened body formed in the area of the pile hole 10 into which the rooting liquid 31 is injected and the area excluding the area in which the pile body 20 is disposed. That is, the pile peripheral fixing portion 40 is a cylindrical cement hardened body, and is formed in such a shape that the pile body 20 can be fitted into the hole formed at the axial center without any gap. The formation method of this pile periphery fixing part 40 is arbitrary, for example, injects the pile periphery fixative fluid 41 (refer FIG. 2 mentioned later) which is cement milk into the inside of the pile hole 10 from the top of the rooting fluid 31, It can be formed by curing the pile peripheral fixing liquid 41 in a state in which the pile body 20 is dropped into the pile peripheral fixing liquid 41. In addition, although the compounding ratio of the water of this rooting liquid 31 and cement is arbitrary and a well-known value can be applied, in this Embodiment, it is formed with cement of a ratio smaller than the rooting liquid 31.

(Structure-bag-like body)
The bag-like body 50 is an adjusting means for adjusting the position or the inclination of the pile body 20. The bag-like body 50 is installed at a position facing the inner circumferential surface of the pile hole 10 in the outer circumferential surface of the pile 20, and a plurality of places (in the present embodiment, It is attached to a total of four places of the front, back, right, and left of pile object 20). Here, the upper and lower positions at which the bag-like body 50 is installed are arbitrary, but in the present embodiment, the outer peripheral surface of the pile 20 at the uppermost end of the positions facing the inner peripheral surface of the pile hole 10 It is installed at the position.

  And a part of lower part of each bag-like object 50 is buried in a pile circumference fixed part 40, and other parts are exposed above the pile circumference fixed part 40. However, the position of the bag-like body 50 is not limited to such a position, and may be provided at a lower position, for example, the bag-like body 50 is disposed at the central position in the height direction of the pile 20 etc. The whole of the body 50 may be buried in the pile circumferential fixing portion 40. In particular, it is desirable to change the installation position of the bag-like body 50 according to the strength of the ground 2 etc., and to install the bag-like body 50 at the position where the strong ground 2 exists in the inner peripheral surface of the pile hole 10 desirable. Further, in the present embodiment, although it is described that all the bag-like members 50 are installed at the same height, the positions in the height direction of the bag-like members 50 may be shifted. Then, a part of the outer surface of the bag-like body 50 is in contact with the outer peripheral surface of the pile 20, and the other part of the outer surface is in contact with the inner peripheral surface of the pile hole 10 . The plurality of bag-like members 50 are configured in the same manner as one another, and in the following, only one bag-like member 50 among the plurality of bag-like members 50 will be described.

  Here, the injection material 51 (see FIG. 6 described later) which has been hardened is injected into the void portion inside the bag-like body 50. The “injection material” 51 is a fluid to be injected into the bag-like body 50, and may be gas, liquid, or solid, and may be, for example, air or water, but in the present embodiment, Is described as using cement milk as the injection material 51. In addition, the shape of the bag-like body 50 is arbitrary as long as it has a cavity in which the injection material 51 can be injected, and in the present embodiment, the bag has a substantially rectangular parallelepiped shape when expanded. It explains as a thing.

(Configuration-pillar)
The column 60 is a joined body joined to the pile 20. The column 60 is a known column that is joined to the pile head of the pile body 20 and constitutes a part of a building. The pillars 60 may be either above ground pillars located on the ground floor or underground pillars located on the ground floor. Moreover, the whole of the said pillar 60 may be located above the construction surface, and one part of the pillar 60 may be located below the construction surface. However, in the present embodiment, the whole of the column 60 is located above the installation surface. Moreover, although this pillar 60 may be any of a permanent pillar or a temporary pillar, the pillar 60 of the present embodiment is a permanent pillar. Moreover, although the specific shape of this pillar 60 is arbitrary and it demonstrates as what is a cylindrical-shaped body whose diameter is smaller than the pile body 20 in this Embodiment, it may be a prism-shaped body, for example. .

(Construction method)
Then, the pile body construction method concerning this embodiment is explained. The said pile body construction method inject | pours the injection material 51 into the bag-like body 50 roughly, and presses the pile body 20 or the pillar 60 by the said injection material 51, The position of the pile body 20 or the pillar 60 or It relates to a method of adjusting the inclination. Here, “adjusting the position or inclination of the pile body 20 or the column 60” typically means setting the inclination of the column 60 within a predetermined inclination (for example, 1/500), The position of the bottom of the column 60 and the position of the pile head of the pile body 20 are included within a predetermined distance (for example, 100 mm) from the pile core. Here, in the pile body construction method according to the present embodiment, roughly, a pile hole forming step, a rooting fluid injection step, a pile peripheral fixing liquid injection step, a bag-like body installation step, a pile body insertion step, and a measurement step , Adjustment process, and pillar installation process.

(Construction method-procedure 1)
FIG. 2: is sectional drawing which shows the foundation structure 1 constructed in the procedure 1 of the pile-body construction method which concerns on this Embodiment. As shown in FIG. 2, first, a pile hole forming process, a rooting fluid injection process, and a pile circumferential fixing solution injection process are sequentially performed.

  The pile hole forming step is a step of forming the pile hole 10 along the vertically downward direction from the construction surface. Thus, the specific method of forming the pile hole 10 is arbitrary, and for example, a method of digging the ground 2 using a well-known digging head can be adopted. Here, in the pile hole forming step, as shown in FIG. 1, the diameter of the pile 20 so that the bag-like body 50 can be disposed between the outer peripheral surface of the pile 20 and the inner peripheral surface of the pile hole 10. A pile hole 10 having a diameter larger than that of the bag-like body 50 is formed.

  The rooting fluid injecting step is a step of injecting the rooting fluid 31 into the bottom of the pile hole 10 formed in the above-described pile hole forming step. The amount of the rooting liquid 31, the mixing ratio of cement, and the like may be optionally determined according to, for example, the hardness of the ground 2, the size of the pile 20, and the like.

  The pile peripheral fixing liquid injection step is a step of injecting the pile peripheral fixing liquid 41 above the rooting liquid 31 in the pile hole 10 formed in the above-described pile hole forming step. The amount of the pile peripheral fixing liquid 41, the mixing ratio of cement, and the like may be optionally determined according to, for example, the hardness of the ground 2, the size of the pile 20, and the like. In addition, these pile hole formation processes, a rooting fluid pouring process, and a pile circumference fixed fluid pouring process can be executed by changing the order as appropriate or combining only some of the processes as appropriate.

(Construction method-procedure 2)
FIG. 3 is a cross-sectional view showing the foundation structure 1 constructed in the procedure 2 of the pile construction method, and FIG. 4 is an enlarged view of a portion A of FIG. As shown in FIGS. 3 and 4, subsequently, a bag-like body installing step and a pile body inserting step are performed.

  The bag-like body installing step is a step of installing the bag-like body 50 at a position facing the inner circumferential surface of the pile hole 10 among the outer circumferential surfaces of the pile 20 inserted into the pile hole 10 in the pile body inserting step described later. is there. Here, although the method of installing the bag-like body 50 on the pile body 20 is arbitrary, in the present embodiment, as shown in FIG. 4, it will be described as attachment using the tape 52 a and the tape 52 b.

  Among them, the tape 52a is a tape for preventing the bag-like body 50 from being curled up by the circumferential fixing liquid 41 when the pile body 20 is inserted into the inside of the pile hole 10, as shown in the figure. , Mounted so as to cover both side ends and the lower end of the bag-like body 50. Although the tape 52a may be attached to the upper end portion of the bag-like body 50, in the present embodiment, the upper end portion of the bag-like body 50 is not dipped in the pile circumferential fixing liquid 41 as described above. It is not attached because it is not necessary to attach the part tape 52a.

  The tape 52b is a tape for more firmly bonding the bag-like body 50 to the pile 20 in the pile-body inserting step described later, and the upper and lower two tapes 52b are provided to surround the outside of each bag-like body 50. It is attached to the place. The tape 52b is broken when the injection material 51 (cement milk) is injected into the bag-like body 50 and the bag-like body 50 expands in an adjustment step described later.

  Here, the bag-like body 50 is mutually connected with the plant 54 through the hose 53, and the injection material 51 delivered from the plant 54 is injected into the inside of the bag-like body 50 through the hose 53. It has a structure. The hose 53 is attached to each bag-like body 50 one by one, and is fastened to the upper end of the pile body 20 by two bands 55.

  The pile body insertion step is a step of inserting the pile body 20 into the pile hole 10. Specifically, the pile 20 having the bag-like body 50 installed on the outer peripheral surface in the above-mentioned bag-like body installation step is lifted with a crane or the like and the weight of the pile 20 in the pile hole 10 (if necessary Then, the pile body 20 is inserted to a position where the lower end portion of the pile body 20 reaches the above-described rooting liquid 31. In this case, when the position of the axial center of the pile body 20 is largely deviated from the position of the axial center of the pile hole 10, a well-known jack assembled outside the pile hole 10 or the pile hole 10 The position shift of the axial center of the pile body 20 may be adjusted to some extent by a known heavy machine disposed outside. Moreover, it inserts in the pile hole 10 in the state which installed the inclinometer 70 in the said pile body 20 previously. Although the installation place of this inclinometer 70 is arbitrary, it demonstrates as what is installed in the pile head of the pile body 20 like illustration in this Embodiment.

(Construction method-procedure 3)
FIG. 5 is a cross-sectional view showing the foundation structure 1 constructed in the procedure 3 of the pile construction method, and FIG. 6 is an enlarged view of a portion B of FIG. As shown in these FIG. 5 and FIG. 6, subsequently, the measurement process and the adjustment process are performed.

  A measurement process is a process of measuring the position (plane position) and inclination of pile object 20. Thus, although the method of measuring the plane position of pile body 20 is arbitrary, for example, pile body 20 is confirmed by a well-known light range finder etc., and the value and length of inclinometer 70 provided in pile body 20 It is possible to adopt a method of measuring the position of the pile body 20 at any level based on the distance. Further, the inclination of the pile body 20 can be easily measured based on the value of the inclinometer 70. In addition, since it is well-known about the specific procedure of such a method, description is abbreviate | omitted.

  The adjustment step is a step of adjusting the position or the inclination of the pile 20 by injecting the injection material 51 into the bag-like body 50 and pressing the pile 20 with the injection material 51. Specifically, first, the injection material 51 is sent from the plant 54 and fed into the inside of the bag-like body 50 through the hose 53 to expand the bag-like body 50, and the bag-like body 50 is used as the outer peripheral surface of the pile 20 And the gap between the inner circumferential surface of the pile hole 10 and the other. Since the tape 52b is broken by inflating the bag-like body 50 in this manner, it is possible to prevent the tape 52b from inhibiting the expansion of the bag-like body 50. Then, by further injecting the injection material 51 into the inside of the bag-like body 50, an internal pressure is applied to the inside of the bag-like body 50, so that the inner circumferential surface of the pile hole 10 and the outer circumferential surface of the pile 20 are mutually A reaction force is applied to the pile body 20 so that the pile body 20 can be pressed by the bag-like body 50. In addition, it is necessary to perform this adjustment process, before the rooting liquid 31 and the pile circumference fixing liquid 41 mentioned above harden | cure.

  Although the specific adjustment method is arbitrary, for example, as in the present embodiment, when the bag-like members 50 are installed at four places in the front, rear, left, and right of the pile 20, the direction opposite to the direction in which the pile 20 is moved By injecting the injection material 51 into the bag-like body 50 disposed on the side, the pile body 20 can be moved in the direction in which it is desired to move. Alternatively, by suctioning the injection material 51 injected into the inside of the bag-like body 50 disposed in the direction to be moved through the hose 53, the reaction force by the bag-like body 50 can be reduced, It can move in the direction you want to move. In addition, actually, when adjusting the pile body 20 in this manner, the above-described measurement process is performed in parallel, and the injection material 51 is injected while confirming the position and inclination of the pile body 20, It is preferable to move the pile body 20 so as to be at an appropriate position or inclination.

  In addition, the reference of adjustment is arbitrary, and for example, the inclination of the pile 20 is adjusted so that the positional shift between the axial center of the pile head of the pile 20 and the axial center of the pile hole 10 becomes equal to or less than a reference length The inclination of the pile 20 may be adjusted so that the inclination of the pile 20 is within a reference angle (for example, 1/500). For example, when adjusting the inclination of the pile body 20, the pile body 20 is adjusted by performing the above-mentioned adjustment while confirming the inclination of the pile body 20 with the inclinometer 70 attached to the pile head of the pile body 20. The inclination of can be adjusted within the reference angle.

  After completion of the above steps, the rooting liquid 31 and the pile peripheral fixing liquid 41 are hardened to form the rooting part 30 and the pile peripheral fixing part 40, and then the column 60 is joined to the pile head of the pile 20. By doing this, it is possible to form the substructure 1 shown in FIG. The specific method of joining the columns 60 in this manner is arbitrary. Moreover, in this embodiment, after installing in the pile hole 10 which constructed the pile body 20 as mentioned above, although it demonstrated as what joins the pillar 60 to the pile body 20, it does not restrict to this, pile body Of course, the pile body 20 and the pillar 60 may be inserted into the pile hole 10 in a state where the 20 and the pillar 60 are integrally joined in advance. In this case, for example, with the head of the column 60 fixed at an appropriate position, the injection material 51 is injected into the bag-like body 50 while confirming the position and inclination of the pile head of the pile body 20 By moving the part, the tilt of the column 60 and the position of the stake head may be simultaneously adjusted. Such an adjustment method can be similarly adopted in the case of providing a structure pillar 90 described later instead of the column 60.

  Although the bag-like body 50 is buried inside the pile hole 10, the injection material 51 injected into the bag-like body 50 is cement milk and has a strength equal to or higher than that of the pile peripheral fixing portion 40. There is no problem to realize Thus, by making the injection material 51 into cement milk, the effort which removes the bag-like body 50 out of the pile hole 10 can be abbreviate | omitted. This is the end of the description of the pile body construction method according to the present embodiment.

(Effect of the embodiment)
As described above, according to the pile construction method of the present embodiment, the injection material 51 is injected into the bag-like body 50 installed in the pile 20 to adjust the position or the inclination of the pile 20 or the column 60. In the ready-made pile system, it is possible to easily adjust the position and the inclination of the pile body 20 or the column 60, and even when the pile head of the pile body 20 does not protrude above the construction surface , The above adjustment is possible.

  In addition, since the bag-like body 50 is installed at the highest position of the outer peripheral surface of the pile 20 facing the inner peripheral surface of the pile hole 10, the pillar installed at the pile head of the pile 20 Adjustment can be performed at the closest position to 60, and the accuracy of adjustment can be improved.

  Further, since the joined body is the column 60 joined to the pile head of the pile body 20, it is possible to improve the accuracy of the position and inclination of the column 60 joined to the pile body 20.

  Moreover, since the injection material 51 is cement milk, the bag-like body 50 can be buried in the inside of the pile hole 10 and the labor and cost for removing the bag-like body 50 to the outside of the pile body 20 can be reduced. Is possible.

[III] Modifications to the Embodiments The embodiments according to the present invention have been described above, but specific configurations and means of the present invention fall within the scope of the technical idea of each invention described in the claims. Can be optionally modified and improved. Hereinafter, such a modified example will be described.

(About problem to be solved and effect of invention)
First of all, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may differ depending on the details of the implementation environment and configuration of the invention, and only some of the problems described above And may only play a part of the above mentioned effects. For example, even if it is not possible to reduce the labor, cost, and time required for the construction by the pile construction method according to the embodiment, when the pile 20 can be constructed by a technology different from the conventional one, The problem of the present invention is solved.

(About dimensions and materials)
The dimensions, shapes, materials, ratios, and the like of each part of the basic structure 1 described in the detailed description of the invention and the drawings are merely examples, and other arbitrary dimensions, shapes, materials, ratios, and the like can be used.

(About adjustment)
In the present embodiment, the inclinometer 70 is installed on the pile head of the pile body 20, and the position and the inclination of the pile body 20 are confirmed while the inclination is confirmed by the inclinometer 70. Not limited thereto, the tiltmeter 70 is installed to a joined body (for example, a pint, a steel column 90, etc.) joined to the pile body 20, and the tilt of the joined body is confirmed by the tiltmeter 70. You may adjust a position and inclination, and you may adjust the position and inclination of the pile body 20 by this. That is, the present invention is not limited to directly adjusting the position or inclination of the pile, but includes indirectly adjusting the position or inclination of the pile by adjusting the position or inclination of the joined body. .

  FIG. 7 is a cross-sectional view showing a foundation structure 80 according to a modification. Note that FIG. 7 corresponds to procedure 3 of the embodiment shown in FIG. As shown in FIG. 7, in the present modification, a construction pillar 90 is joined to the pile head of the pile body 20. And the pile head of pile object 20 is located below the construction side, and at least one copy of structure pillar 90 is located above the construction side. In addition, the inclinometer 70 is attached to the head of the telegraph pole 90. Then, in the adjustment step, the injection material 51 is injected into the bag-like body 50 while confirming the inclination of the structure pillar 90 (that is, the inclination of the pile body 20) with the inclinometer 70 attached to the head of the structure column 90. By doing this, the position of the pile body 20 is adjusted. Thus, it is possible to apply the said pile body construction method also to a reverse operation method.

  Moreover, although the bag-like body 50 is attached with respect to the pile body 20 in this modification, among the outer peripheral surfaces of the steel column 90, the bag-like body 50 is opposed to the inner peripheral surface of the pile hole 10. You may install it. According to such a modification, by injecting the injection material 51 into the bag-like body 50 and pressing the structure pole 90 with the injection material 51, the position or the inclination of the pile body 20 or the structure pole 90 can be determined. Since it adjusts, even if it is not possible to visually recognize from the outside because the pile body 20 is located below the construction surface, it is possible to adjust the position or inclination of the pile body 20 or the steel column 90. .

(About a bag-like body)
In the present embodiment, the number of the bag-like members 50 is four, but as long as the injection material 51 is injected into the inside to adjust the pile 20 to the target position or inclination, The number of pouches 50 is arbitrary. For example, the number may be less than four or four or more. Moreover, it is one bag-shaped body 50, Comprising: The bag-shaped body 50 whose internal space was divided into plurality is arrange | positioned so that the whole periphery of the pile body 20 may be covered, and injection material is suitably injected into each divided space. By injecting 51, the position or inclination of the pile body 20 may be adjusted.

  Further, in the present embodiment, the bag-like body 50 into which the injection material 51 is injected is described as being finally buried in the inside of the pile hole 10, but the position of the pile body 20 is adjusted to You may take out the bag-like body 50 out of the pile hole 10, after 30 solidifies.

(About the pillar)
In the present embodiment, after the pile body 20 is constructed on the ground 2, the pillar 60 is described as being joined to the pile head of the pile body 20, but the present invention is not limited thereto. And may be formed by dropping these integrated members into the pile hole 10. Moreover, although the pile body 20 and the pillar 60 were directly joined in this embodiment, the invention is not limited to this, and a concrete casing or the like for securing a fixing length between the pile body 20 and the pillar 60 may be formed. I do not care.

(About tape)
In the present embodiment, the bag-like body 50 is fixed to the pile body 20 by the tape 52a and the tape 52b, and the tape 52b is broken when the injection material 51 of the bag-like body 50 is injected. Not limited to this. That is, when the pile body 20 is inserted into the pile hole 10, the bag-like body 50 does not curl up or shift, and when the injection material 51 is injected into the bag-like body 50, It can be fixed by any means as long as it can be fixed so as not to inhibit swelling. For example, instead of the tape 52a and the tape 52b, the bag-like body 50 may be fixed by being deformed according to the expansion of the bag-like body 50 such as rubber. Alternatively, the surface on the pile body 20 side of the bag-like body 50 is adhered and fixed to the pile body 20 with an adhesive, or the bag-like body 50 is fixed to the pile body 20 with a bolt It may be sandwiched and fixed by an iron plate or the like.

(About pile body insertion process)
In the present embodiment, after the pile hole 10 is formed and the circumferential fixing liquid 41 and the rooting liquid 31 are injected into the pile hole 10, the pile body 20 is inserted into the pile hole 10; The order may be changed appropriately to known steps. For example, a well-known Nakabori construction method may be employed, and the hollow portion of the pile body 20 may be excavated to form the pile hole 10, and the pile body 20 may be sunk.

(Supplementary note)
The pile construction method according to appendix 1 includes a pile hole forming step of forming a pile hole along a vertically downward direction from a construction surface, a pile insertion step of inserting a pile into the pile hole, and an outer peripheral surface of the pile. Or a bag-like body installation step of installing a bag-like body at a position facing the inner peripheral surface of the pile hole among the outer peripheral surfaces of the joined body joined to the pile body, and injecting into the bag-like body Adjusting the position or inclination of the pile body or the joint body by injecting a material and pressing the pile body or the joint body by the injection material.

  The pile body construction method according to appendix 2 is the pile body construction method according to appendix 1, wherein a pile head of the pile body is located below the construction surface, and at least a part of the joined body is from the construction surface Also, in the adjustment step, the injection material is injected into the bag-like body, and the joint material is pressed by the injection material to position or tilt the pile body or the joint body. adjust.

  The pile body construction method according to appendix 3 is the pile body construction method according to appendix 1 or 2, wherein the bag-like body is the most out of the positions on the outer peripheral surface of the pile body facing the inner peripheral surface of the pile hole. Install at the top position.

  The pile body construction method according to appendix 4 is the pillar body construction method according to any one of appendixes 1 to 3, wherein the joined body is a column joined to a pile head of the pile body.

  The pile body construction method according to appendix 5 is the pile body construction method according to any one of appendixes 1 to 4, wherein the injection material is cement milk.

(Effect of Supplementary Note)
According to the pile construction method described in Appendix 1, since the position or inclination of the pile or joint is adjusted by injecting the injection material into the bag-like body installed in the pile, in the ready-made pile system, the pile Or while being able to adjust the position and inclination of a conjugate | zygote easily, even if it is a case where the pile head of a pile does not protrude above the construction surface, said adjustment is possible.

  According to the pile construction method described in Supplementary Note 2, since the injection material is injected into the bag-like body and the bonded body is pressed by the injection material, the position or inclination of the pile body or the joint body is adjusted. Even when the pile is located below the construction surface and can not be viewed from the outside, it is possible to adjust the position or the inclination of the pile or the joint.

  According to the pile construction method described in Appendix 3, the bag-like body is installed at the highest position among the positions facing the inner peripheral surface of the pile hole in the outer peripheral surface of the pile, so the pile of the pile Adjustment can be performed at a position closest to a pillar or the like installed on the head, and the accuracy of adjustment can be improved.

  According to the pile construction method described in Appendix 4, since the joined body is a pillar joined to the pile head of the pile, the accuracy of the position and inclination of the pillar joined to the pile is improved. Things are possible.

  According to the pile construction method described in Appendix 5, since the injection material is cement milk, the bag-like body can be buried and killed inside the pile hole, and it takes time and effort to remove the bag-like body to the outside of the pile body And costs can be reduced.

DESCRIPTION OF SYMBOLS 1 Foundation structure 2 Ground 10 Pile hole 20 Pile body 30 Root compacting liquid 40 Pile peripheral fixing part 41 Pile peripheral fixing liquid 50 Bag-like body 51 Injection material 52a Tape 52b Tape 53 Hose 54 Plant 55 Band 60 Column 70 Inclinometer 80 Foundation structure 90

Claims (5)

A pile hole forming step of forming a pile hole along a vertically downward direction from a construction surface;
Pile body insertion step of inserting a pile body into the pile hole;
A bag-like body installation step of installing a bag-like body at a position facing the inner peripheral surface of the pile hole among the outer peripheral surface of the pile or the outer peripheral surface of a joined body joined to the pile;
By pressing the pile body or the conjugate by the injection material by injecting grout into the bag type member, it viewed including the adjusting step, the adjusting the position or inclination of the pile body or said conjugate,
The pile head of the pile body is located below the work surface, and at least a part of the joint is located above the work surface,
In the adjustment step, the injection material is injected into the bag-like body, and the bonded body is pressed by the injection material to adjust the position or the inclination of the pile body or the joint body.
Pile construction method. A pile hole forming step of forming a pile hole along a vertically downward direction from a construction surface;
Pile body insertion step of inserting a pile body into the pile hole;
A bag-like body installation step of installing a bag-like body at a position facing the inner peripheral surface of the pile hole among the outer peripheral surface of the pile or the outer peripheral surface of a joined body joined to the pile;
By pressing the pile body or the conjugate by the injection material by injecting grout into the bag type member, it viewed including the adjusting step, the adjusting the position or inclination of the pile body or said conjugate,
In the bag-shaped body installation step, a plurality of the bag-shaped bodies are installed at a plurality of locations around the pile body or the joined body,
Pile construction method. In the outer peripheral surface of the pile body, the bag-like body is installed at the highest position among the positions facing the inner peripheral surface of the pile hole.
The pile body construction method according to any one of claims 1 to 2. The joint body is a column joined to a pile head of the pile body,
The pile body construction method according to any one of claims 1 to 3. The injection material is cement milk,
The pile body construction method according to any one of claims 1 to 4.

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