JP5426424B2 - Method for placing ground reinforcing pile and rod for preceding excavation and casting apparatus used therefor - Google Patents

Description

  The present invention relates to a method for placing a ground reinforcing pile and a rod for preceding excavation and a placing apparatus used therefor.

  When building a building on soft ground, a ground reinforcement pile is placed to reinforce the ground, but if there is an obstacle such as a boulder in the ground, the ground reinforcement pile hits the obstacle and its depth. It can not be placed more than the above, or the core displacement of the ground reinforcement pile will occur.

  Therefore, before the ground reinforcement pile is placed, a method is used in which a preliminary excavation hole is dug using a harder rod made of a material harder than the ground reinforcement, and the ground reinforcement pile is placed in the advance excavation hole. ing.

Japanese Patent Laid-Open No. 9-13375

  However, prior to the placement of the ground reinforcement piles, the construction of the preceding hole is dug with the prior excavation rod, so the construction consists of two steps, the placement of the advance excavation rod and the placement of the ground reinforcement pile. There was a problem. In addition, when constructing only one leading digging rod using a pile driving machine, the pile digging rod is inclined due to the biased load from the pile driving machine, so that the preceding digging hole is inclined, As a result, there was a problem that the ground reinforcement pile was inclined and driven.

  In view of the problems as described above, the present invention can shorten the construction process and can be driven without inclining the ground reinforcing pile. It is an object of the present invention to provide a method and a driving device used therefor.

  The above-mentioned problem is that the ground excavation pile before the ground reinforcement pile is placed using the ground reinforcement pile and the ground excavation rod placement device in which the ground reinforcement pile and the prior excavation rod are attached to the loading beam. It is characterized in that the ground excavation hole is pre-drilled with the prior excavation rod at the position where the ground reinforcement pile is placed in the next process at the same time as the ground excavation hole is cast in the prior excavation hole that has been excavated with the rod for construction. The method of placing the ground reinforcement pile and the pre-excavation rod to be installed, and the ground reinforcement pile and the pre-excavation rod prior to the construction of the ground reinforcement pile are attached to the loading beam, and the ground reinforcement pile and the pre-excavation rod are simultaneously installed. It can be solved by a ground reinforcing pile and a rod driving device for preceding excavation.

  In this placing method and placing device, a pile placing machine connected to the loading beam using a ground reinforcing pile and a leading excavation rod placing device in which a ground reinforcing pile and a leading excavation rod are attached to the loading beam. Therefore, the ground reinforcement pile and the preceding digging rod can be simultaneously placed on the ground, so that the pile piercing machine does not repeat the two steps of the pile placement machine for the placement of the ground reinforcement pile and the digging of the preceding digging hole by the preceding digging rod. Because it can be done in a single process, the construction process can be shortened and the construction time can be shortened.

  Then, by repeating the construction in which the ground reinforcement pile and the pre-excavation rod are simultaneously placed on the ground, the ground reinforcement material is efficiently placed on the site while keeping the distance between the ground reinforcement piles constant. Can continue.

  In addition, using the loading beam to which the ground reinforcement pile and the pre-excavation rod are attached, the construction of the pre-excavation rod is performed simultaneously with the placement of the ground reinforcement pile. Since the load is applied evenly without being biased, the preceding digging rod can be applied straight to the ground, and the preceding digging hole can be provided straight without inclining.

  Moreover, in the ground reinforcing pile and the preceding excavation rod placing device, the loading beam includes two or more ground reinforcing pile attaching portions, two or more preceding excavating rod attaching portions, and two or more pile placing machine connections. It has a rod attachment part, and it is good that a ground reinforcement pile, a rod for preliminary excavation, and a pile driving machine connection rod can be attached to arbitrary positions, respectively.

  A ground reinforcement pile, a pre-excavation rod, and a pile driving machine connecting rod that connects the loading beam and the pile driving machine can be attached to the loading beam at any position. The weight balance of the load beam including the ground reinforcement pile and the pre-excavation rod is adjusted by adjusting the mounting position of the ground reinforcement pile, the pre-excavation rod and the pile driving machine connecting rod according to the form and weight of the construction rod. The load beam can be kept horizontal, and the ground beam can be kept horizontal and the load beam can be loaded with a pile driving machine. Can be cast. Moreover, the space | interval of ground reinforcement piles can be adjusted by changing the space | interval of a ground reinforcement pile and a rod for preceding excavation.

  Since the present invention is as described above, the construction process can be shortened, and the ground reinforcement pile and the method for placing the pre-excavation rod can be placed without tilting the ground reinforcement pile, and to it. A driving device to be used can be provided.

FIG. 1 (a) is a partial cross-sectional front view showing a ground reinforcing pile and a pre-digging rod placing device according to an embodiment of the present invention, and FIG. FIGS. 1A and 1B are partial cross-sectional front views showing the state of attachment of the ground reinforcing pile, the preceding excavation rod, and the pile driving machine connecting rod to the loading beam. Drawing (a) thru / or (c) is a front view which shows sequentially a placement method of a ground reinforcement pile and a prior excavation rod using a ground reinforcement pile and a prior excavation rod placement device. FIGS. 1A to 1C are partially sectional perspective views showing a loading beam used in another embodiment of the present invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  In the ground reinforcing pile and the leading excavation rod placing apparatus 1 capable of simultaneously placing the ground reinforcing pile and the leading excavation rod shown in FIG. 1, 2 is the ground reinforcing pile, 4 is the preceding excavation rod, and 6 is the loading beam. .

  The ground reinforcement pile 2 is made of a plastic pile having a length and a diameter designed according to the situation of the building and the ground, and the ground reinforcement pile 2 is attached to the loading beam 6 via a ground reinforcement pile fixing chuck 3 to which the ground reinforcement pile 2 can be arbitrarily attached and detached. It is fixed. The ground reinforcement pile 2 is driven into a preceding digging hole 10 excavated by a later-described digging rod.

  Prior to placing the ground reinforcement pile 2 on the ground, if there is an obstacle such as a boulder in the ground, the ground excavation rod 4 will hit the obstacle and be placed more than its depth. It is for excavating the pre-drilling hole 10 in the ground in order to prevent it from occurring or the core displacement of the ground reinforcing pile, and it is made of a steel pipe having a smaller diameter and higher rigidity than the ground reinforcing pile 2, It is fixed to the beam 6. Reference numeral 5 denotes a positioning projection for aligning the position on the ground where the leading excavation rod is to be placed.

  The pile driving machine connecting rod 8 has one end fixed to the loading beam 6 and the other end connected to a pile driving machine (not shown) to transmit the loading load by the pile driving machine to the loading beam 6. To do.

  The loading beam 6 is a bar-shaped member having a rectangular cross section extending in the horizontal direction, and a pile driving machine connecting rod mounting having a female screw threadedly engaged with a male screw provided at an end of the pile driving machine connecting rod 8 at the upper part. A plurality of portions 9 are provided at intervals. On the other hand, in the lower part of the loading beam 6, the ground reinforcement having a male screw provided at the end of the ground reinforcing pile fixing chuck 3 and a female screw engaged with the male screw provided at the end of the preceding excavation rod 4. A plurality of pile attachment portions 7 and a preceding excavation rod attachment portion 7 are provided at intervals. In the present embodiment, the male screw provided at the end of the ground reinforcing pile fixing chuck 3 and the male screw provided at the end of the preceding excavation rod 4 have the same shape and are matched to the male screw. The ground reinforcement pile mounting portion 7 and the preceding excavation rod mounting portion 7 are also provided with female screws of the same shape without distinction.

  As shown in FIG. 1 (B), FIG. 2 (B), and (B), the ground reinforcement pile fixing chuck 3, the pre-excavation rod 4, and the pile driving machine connecting rod 8 are respectively connected to the ground reinforcement pile mounting portion 7. It can be detachably attached to any position of the leading excavation rod mounting portion 7 and the pile driving machine connecting rod mounting portion 9, and according to the pitch of the ground reinforcing pile 2, the ground reinforcing pile fixing chuck 3 and The distance between the leading excavation rods 4 is adjusted and fixed to the ground reinforcement pile mounting portion 7 and the leading excavation rod mounting portion 7, respectively. Further, in order to drive the ground reinforcing pile fixing chuck 3 and the preceding excavation rod 4 vertically without being inclined with respect to the ground, the distance and weight of the ground reinforcing pile fixing chuck 3 and the preceding excavation rod 4 are considered. Then, the loading beam 6 is maintained in a horizontal state, and the pile driving machine connecting rod 8 is fixed to the pile driving machine connecting rod attaching portion 9.

  The placement of the ground reinforcement pile and the preceding excavation rod using the ground reinforcement pile and the advance excavation rod placing apparatus 1 is performed as follows.

  As shown in FIG. 3A, first, only the preceding excavation rod 4 is attached to the lower portion of the loading beam 6, and the preceding excavation hole 10 is excavated in the ground. Next, as shown in FIG. 3 (b), the ground reinforcing pile 2 and the pre-excavation rod 4 are attached to the loading beam 6 via the ground reinforcing pile fixing chuck 3 at predetermined intervals, respectively. The ground reinforcing pile 2 and the preceding digging rod 4 are driven simultaneously by aligning the ground reinforcing pile 2 with the preceding digging hole 10 excavated by the preceding digging rod 4 in the previous step. After the placement, as shown in FIG. 3 (c), the ground reinforcing pile 2 is removed from the ground reinforcing pile fixing chuck 3, and the preceding excavation rod 4 is pulled out from the ground while the ground reinforcing pile 2 is placed on the ground. Then, the ground reinforcement pile 2 separately attached to the ground reinforcement pile fixing chuck 3 from which the ground reinforcement pile 2 has been removed is attached, and the ground reinforcement pile 2 is aligned with the preceding borehole 10 excavated by the preceding excavation rod 4 in the previous process, The ground reinforcing pile 2 and the preceding excavation rod 4 are driven simultaneously. The ground reinforcement pile is placed on the ground by sequentially repeating the above steps.

  In this placement method and placement device, the construction of the ground reinforcement piles and the excavation of the pre-drilling holes by the pre-excavation rod can be performed in one step without repeating the process twice. The process can be shortened and the construction time can be shortened. By repeating the construction in which the ground reinforcement pile and the pre-excavation rod are simultaneously placed on the ground, the ground reinforcement pile can be efficiently placed on the ground. Can continue.

  In addition, using the loading beam to which the ground reinforcement pile and the pre-excavation rod are attached, the construction of the pre-excavation rod is performed simultaneously with the placement of the ground reinforcement pile. Since the load is evenly distributed without bias, the pre-excavation rod can be installed straight to the ground, and the pre-excavation hole can be excavated straight without tilting, and the ground reinforcement pile is Can be placed straight. In particular, even if the ground reinforcement piles are plastic piles, the ground excavation holes are excavated by the rods for leading excavation made of high-rigidity steel pipes, so the ground reinforcement can be placed straight on the ground. .

  In particular, it is possible to attach a ground reinforcement pile, a pre-excavation rod, and a pile driving machine connecting rod for connecting the loading beam and the pile driving machine to the loading beam, respectively. By adjusting the mounting position of the ground reinforcing pile, the leading excavation rod and the pile driving machine connecting rod according to the form and weight of the leading excavation rod, the loading beam including the ground reinforcing pile and the leading excavation rod The weight balance is adjusted so that the loading beam can be kept horizontal, and the loading beam is kept horizontal and a load is applied to the loading beam by a pile driving machine, so that the ground reinforcement material and the pre-excavation rod are grounded. Can be placed straight on.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. In the above embodiment, the case where the ground reinforcing pile is a plastic pile has been shown, but the material of the ground reinforcing pile is not limited, and may be a material other than the plastic pile, for example, a steel pipe pile. However, it may be a wooden pile.

  Moreover, in the above embodiment, the case where two of the ground excavation rods for excavating the ground excavation hole for excavating the ground excavation hole and the next excavation hole for the excavation of the ground excavation pile are shown. Attach two or more pre-excavation rods to the loading beam to the ground reinforcement pile, and drill a pre-drilling hole with two or more pre-excavation rods by placing one ground reinforcement pile. May be. In this case, it suffices to attach one or more ground reinforcing piles to the loading beam for a plurality of preceding excavated holes, and place one or more ground reinforcing piles simultaneously.

  Moreover, there is no restriction | limiting also about the form of a loading beam, As shown in FIG. 4 (A), for example, as shown in FIG. Female screws as attachment parts such as ground reinforcement pile attachment parts and preceding excavation rod attachment parts may be provided, or as shown in FIG. As shown in FIG. 4C, it may be a planar view square shape.

  Furthermore, the mounting of the loading beam, the ground reinforcing pile, the ground reinforcing pile fixing chuck, and the pile driving machine connecting rod is not limited to the screw type, and there is no limitation on the mounting method as long as it can be attached and detached. .

DESCRIPTION OF SYMBOLS 1 ... Ground reinforcement pile and rod driving device for preceding excavation 2 ... Ground reinforcement pile 3 ... Ground reinforcement pile fixing chuck 4 ... Rod for preceding excavation 6 ... Loading beam 7 ... Ground Reinforcement pile mounting part, pre-drilling rod mounting part 8 ... pile driving machine connecting rod 9 ... pile driving machine connecting rod mounting part 10 ... pre-drilling hole

Claims (3)

Using the ground reinforcement pile and the pre-excavation rod driving device in which the ground reinforcement pile and the pre-excavation rod before installation of the ground reinforcement pile are attached to the loading beam,
Pre-drilling with a pre-digging rod at the position where the ground reinforcement pile is to be placed in the next process at the same time as placing the ground reinforcement pile into the pre-drilled hole drilled by the pre-digging rod before placing the ground reinforcement pile A method for placing a ground reinforcing pile and a rod for preceding excavation, characterized by digging a hole.   A ground reinforcement pile and a prior excavation rod driving device, in which a ground reinforcement pile and a prior excavation rod before placement of the ground reinforcement pile are attached to the loading beam, and the ground reinforcement pile and the advance excavation rod can be placed simultaneously.   The above-mentioned cargo beam has two or more ground reinforcing pile mounting portions, two or more preceding digging rod mounting portions, and two or more pile driving machine connecting rod mounting portions, and the ground reinforcing pile and the leading digging rod, The ground reinforcement pile and the preceding excavation rod placing device capable of simultaneously placing the ground reinforcement pile and the preceding excavation rod according to claim 2, wherein the pile placing machine connecting rods can be respectively attached at arbitrary positions.

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