As-built management method, core material pouring or erection method, as-built management device and core material

Abstract

To provide a finished shape control method, a core material driving or erecting method, a finished shape control device, and a core material capable of accurately controlling the finished shape of a foot protection portion formed by a foot protection liquid.SOLUTION: A finished shape control device for controlling the finished shape of a foot protection portion formed between a steel pipe pile 10 in the ground and the ground includes a socket member 21, a sensor pipe 30, and a detection sensor 35. The socket member 21 is fixed to the steel pipe pile 10 at a height corresponding to the predetermined detection height DF1 of a foot protection liquid when the steel pipe pile 10 is arranged at a predetermined depth in the ground. The sensor pipe 30 extends in the axial direction of the steel pipe pile 10 and is arranged in an open area S1 generated at the detection height DF1 by changing the position relative to the socket member 21. The detection sensor 35 detects the foot protection liquid filled between the steel pipe pile 10 and the ground.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a method for managing the finished shape of a root protection section formed in a core material cast or erected in the ground, a method for casting or erecting a core material, a finished shape management device, and a core material used therefor. [Background technology]

[0002] BACKGROUND ART A vibrohammer method combined with a water jet is known as one method for driving pile bodies (core materials) such as steel pipe piles into the ground (see, for example, Patent Document 1). In this method, high-pressure water is sprayed from multiple nozzles attached to the tip of the pile to loosen or cut the bedrock (hard ground).Furthermore, gravel blocks are displaced, and the pile is driven into the bedrock using the vibration force of the vibrohammer and the pile's own weight.

[0003] Generally, when the tip of the pile body is driven into the bedrock to a predetermined depth, that is, when the pile body is driven to a predetermined maximum driving depth, a base-hardening liquid (grout material) such as cement milk is filled into the gap between the tip of the pile body and the bedrock and allowed to harden. The base-hardening liquid fills and hardens to form a base that integrates the pile body and the bedrock, thereby increasing the bearing capacity of the pile. In some cases, the gap between the periphery of the pile body and the bedrock is filled with grout material such as cement milk and allowed to harden, thereby integrating the pile body with the ground. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-65692 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, conventionally, construction management when filling the gap between the tip of the pile and the bedrock with foot protection fluid has been carried out by measuring the amount of foot protection fluid injected. In other words, filling of the foot protection fluid was stopped when a flow meter confirmed that the planned amount of fluid was being injected. However, when filling the foot protection liquid into cracked bedrock or bedrock that is prone to water paths, such as along a river, the liquid may flow into unexpected gaps such as cracks or water paths. In this case, even if the planned injection amount is injected, there is a risk that the foot protection portion will not be formed properly. [Means for solving the problem]

[0006] The method for managing as-builts that solves the above-mentioned problems is a method for managing the as-builts of a base protection section formed between a core material in the ground and the ground, in which the core material is placed at a predetermined depth in the ground, and a tip of a sensor pipe extending in the axial direction of the core material is inserted into a socket member fixed to the core material at a height corresponding to the planned liquid level of the base protection liquid, and the core material is poured or installed, and when filling the base protection liquid between the core material and the ground, the relative position of the socket member and the sensor pipe is changed, and through the open area formed at the liquid level by the change, The sensor is inserted into the sensor tube from above. The detection sensor detects the filling position of the root hardening liquid. Furthermore, a method for installing or constructing a core material to solve the above problem is a method for installing or constructing a core material that forms a root protection section between a core material in the ground and the ground, in which a socket member into which a tip of a sensor pipe extending in the axial direction of the core material is inserted is fixed to the core material, and the core material is installed or constructed so that the socket member is positioned at a height corresponding to the liquid level of the root protection liquid, The sensor is inserted into the sensor tube from above. The relative positions of the socket member and the sensor pipe are changed so that the detection sensor can detect the filling position of the root hardening liquid, and the root hardening liquid is filled between the core material and the ground.

[0007] Furthermore, a work-in-progress management device that solves the above problem is a work-in-progress management device for managing the work-in-progress of a root fixing portion formed between a core material in the ground and the ground, and includes: a socket member fixed to the core material at a height corresponding to the planned liquid level of the root fixing liquid when the core material is placed at a predetermined depth in the ground; a sensor tube extending in the axial direction of the core material, which is provided so as to be able to fit into the socket member, and which is provided so that by changing its relative position with respect to the socket member from the fitted state to the socket member, an open area that connects the hollow portion to the outside is formed at the liquid level; The sensor is inserted into the sensor tube from above, A detection sensor is provided that detects the root strengthening liquid filled between the core material and the ground through the open area.

[0008] The core material that solves the above problem is a core material that is installed in the ground, and is fixed at a height corresponding to the planned liquid level of the foot protection liquid when placed at a predetermined depth in the ground. By changing the relative position of the fitted sensor pipe, The sensor tube is inserted from above. It has a cylindrical socket member for forming an open area where the detection sensor detects the root hardening liquid, and a protective member fixed and positioned directly below the socket member. [Effects of the Invention]

[0009] According to the present invention, the liquid level of the root protection liquid can be identified during construction, so that the finished shape of the root protection portion formed by the root protection liquid can be accurately managed. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a front view of a vibratory pile driver and a steel pipe pile attached thereto, illustrating a method of filling a foot protection liquid in the first embodiment. [Figure 2] FIG. 1 is a plan view (horizontal cross-sectional view) of a steel pipe pile according to a first embodiment. [Figure 3] 1 is a schematic diagram of a main part of a steel pipe pile according to a first embodiment. [Figure 4]1 is a diagram for explaining the main parts of the steel pipe pile and the sensor pipe in the first embodiment, where (a) shows the state at the time of casting, (b) shows the state after an open area has been formed, and (c) shows the state after the detection sensor has been placed. [Figure 5] FIG. 10 is a schematic diagram of a main part of a steel pipe pile according to a second embodiment. [Figure 6] A diagram for explaining the main parts of the steel pipe pile and the sensor pipe in the second embodiment, where (a) shows the state at the time of casting, (b) shows the state after an open area has been formed, and (c) shows the state after the detection sensor has been placed. DETAILED DESCRIPTION OF THE INVENTION

[0011] (First embodiment) A first embodiment of the present invention will be described below with reference to Figures 1 to 4. The present embodiment will be described as a method for managing the shape of a foundation, a method for pouring or erecting a core material, a method for managing the shape of a foundation formed by a foundation solidification liquid G1, using the method for managing the shape of a foundation, a method for pouring or erecting a core material, a foundation solidification device, and a core material according to the present invention.

[0012] As shown in Figure 1, a steel pipe pile 10 as a core material used in the finished product management device of this embodiment has a vibrating pile driver 50 such as a vibro hammer attached near its base end (near its upper end), and is driven into the ground by driving the vibrating pile driver 50.

[0013] Fig. 2 is a cross-sectional view (planar cross-section) of the steel pipe pile 10, and Fig. 3 is a schematic diagram showing the main parts of the steel pipe pile 10. Fig. 4(a) shows the state during driving, Fig. 4(b) shows the state after the open area S1 has been formed, and Fig. 4(c) shows the state after the detection sensor 35 has been placed.

[0014] As shown in FIG. 2 , for example, a steel pipe pile 10 includes a main pipe 11. The tip (lower end) of the main pipe 11 is made of high-strength steel. A plurality of jet pipes 12 and a plurality of grout pipes 15 are fixed to the inner circumferential surface (inner side) and outer circumferential surface (outer side) of the main pipe 11. Furthermore, a plurality of socket members 21 are fixed to the outer circumferential surface (outer side) of the main pipe 11 together with the plurality of grout pipes 15. The jet pipe 12 is a nozzle pipe equipped with a nozzle at its tip (lower end). When the steel pipe pile 10 is driven into the ground, water is circulated through the jet pipe 12 and jet water is sprayed from the nozzle. The grout pipe 15 is a supply pipe for injecting cement milk as a foot protection liquid (grout) G1 into a hole. The jet pipes 12 and grout pipes 15 each extend parallel to the central axis (axial direction) of the main pipe 11, and are arranged at predetermined intervals in the circumferential direction around the central axis.

[0015] Furthermore, in this embodiment, two socket members 21 are provided at symmetrical positions (opposite positions) about the central axis on the outer peripheral surface of the main pipe 11 of the steel pipe pile 10. These socket members 21 are arranged at a position higher than the tip (lower surface) of the main pipe 11.

[0016] As shown in Figure 3, socket member 21 of this embodiment is fixed to the outer peripheral surface of main pipe 11 at a position lower than detection height DF1, which is the liquid level height that is the planned position for the uppermost liquid level of foot hardening liquid G1. This socket member 21 is a cylindrical body with a bottom, in other words, a bottomed cylindrical (circular tubular) shape, and extends along the central axis of main pipe 11 with the bottom side (the tip side of main pipe 11) closed and the upper side (the side opposite the tip of main pipe 11) open. Note that socket member 21 is not necessarily limited to a cylindrical body (circular tubular body) or a bottomed cylindrical body, and may also be composed of a tubular body or a bottomed tubular body.

[0017] Furthermore, a protective member 22 is fixed to the outer periphery of the main tube 11 on the tip side (lower side) of the socket member 21. In this embodiment, this protective member 22 is made up of two rectangular parallelepiped blocks made of high-strength steel. Note that the number and arrangement of the blocks of the protective member 22 do not need to be limited as in this embodiment.

[0018] Additionally, a plurality of stop members 16 for preventing vibration of the sensor tube 30 (described later) are fixed to the outer circumferential surface of the main body tube 11. A plurality of stop members 16 are provided above the socket member 21, at predetermined intervals in the vertical direction, on the axis (shaft, axial direction) of the socket member 21 extending in the vertical direction.

[0019] (Method of managing the finished product in the gun pile construction method) Next, a gun pile construction method using the above-described steel pipe pile 10 will be described. As shown in Fig. 1, in the gunpile method, the upper end of a steel pipe pile 10 is attached to a vibrating pile driver 50. Then, a sensor pipe 30 is installed.

[0020] 4(a), the sensor pipe 30 is, for example, a hollow pipe having a cylindrical shape with both ends open. The tip of the sensor pipe 30 is configured so that it can be fitted into the socket member 21. The curved upper end of the sensor pipe 30 is cut off as necessary after the steel pipe pile 10 is driven. The sensor tube 30 is then disposed by inserting its tip into the opening at the top of the socket member 21. Furthermore, the sensor tube 30 is disposed with its middle portion engaged with the stopper member 16.

[0021] In this manner, the steel pipe pile 10 with the sensor pipe 30 attached is driven into the ground. In this case, crushed rock particles generated by striking the rock layer B1 with the steel pipe pile 10 are washed away with water sprayed from the jet pipe 12, and the steel pipe pile 10 is driven while being vibrated by driving the vibratory pile driver 50. Compressed air may be supplied downward from above into the sensor pipe 30 to further prevent crushed rock particles from getting mixed into the socket member 21.

[0022] Thereafter, when the tip of the steel pipe pile 10 reaches a desired depth in the bedrock layer B1, the injection of water is stopped. Next, the foot protection liquid G1 is discharged from the grout pipe 15. Here, the foot protection liquid (grout) G1 is generally a cement milk that has been prepared in advance so that it will develop the required strength when hardened. A pre-calculated injection amount of this cement milk is injected. This injection amount is calculated before the injection work is carried out by measuring the difference between the excavation diameter including the overexcavation width of the bedrock layer B1 determined at the time of design and the pile diameter of the steel pipe pile 10, the depth of the bottom end of the excavation of the ground determined at the time of construction, and the depth of the top end of the foot protection liquid G1 specified for each pile construction method.

[0023] Next, the open region S1 is formed. Specifically, as shown in Fig. 4(b), the sensor tube 30 is lifted upward and the tip of the sensor tube 30 is pulled out from the socket member 21. In this case, an open area S1 is provided between the tip of the sensor tube 30 and the socket member 21. In this embodiment, the detection height DF1 is located in this open area S1.

[0024] Next, as shown in Figure 4(c), the detection sensor 35 is inserted from above the sensor pipe 30 and positioned at detection height DF1 in the open area S1. A computer (measurement acquisition unit) installed outside the steel pipe pile 10 acquires measurement values from the detection sensor 35 via an electric cable 36 and displays them on a display. Note that with the detection sensor 35 positioned at detection height DF1, the electric cable 36 is positioned inside the sensor pipe 30.

[0025] In this embodiment, an electrical conductivity sensor that measures the electrical conductivity (mS / m) of a liquid is used as the detection sensor 35. The electrical conductivity sensor exhibits, for example, an electrical conductivity of 80 to 150 mS / m for water and an electrical conductivity of 8000 to 12000 mS / m for cement milk. In other words, since water and cement milk have different electrical conductivities, the electrical conductivity sensor can be used to detect liquid at the detection height DF1.

[0026] If there are no cracks or voids in the rock layer B1 through which the foot protection liquid G1 can flow, the liquid level of the foot protection liquid G1 will rise to the expected height based on the pre-calculated injection rate, which will be the same height as the top of the designed foot protection section (detection height DF1). At this time, as mentioned above, the electrical conductivity measured by the detection sensor 35 will be, for example, 8000 to 12000 mS / m. As a result, it can be determined from the measurement value of the detection sensor 35 that the foot protection liquid G1 has been filled up to the detection height DF1.

[0027] On the other hand, if there are cracks or voids in the rock layer B1 surrounding the steel pipe pile 10 through which the foot protection liquid G1 will flow out, the electrical conductivity measured by the detection sensor 35 will be significantly lower than 8000 mS / m, even if the pre-calculated amount of cement milk is injected. Therefore, a predetermined additional amount of foot protection liquid G1 is injected again through the grout pipe 15. Here, if the electrical conductivity measured by the detection sensor 35 after the addition of the cement milk does not match the electrical conductivity of the cement milk, a predetermined additional amount of foot protection liquid G1 is further injected, and injection is continued until the electrical conductivity of the cement milk is measured.

[0028] Then, when the detection sensor 35 detects the electrical conductivity of the cement milk and thereby confirms that the foot protection liquid G1 has been filled, the electric cable 36 is pulled in and the detection sensor 35 is pulled out from the sensor pipe 30. Thereafter, when the foot protection liquid G1 hardens, a foot protection portion of a size and shape that matches the designed shape and dimensions is suitably formed at the tip of the steel pipe pile 10.

[0029] (action) In this embodiment, when the foot hardening liquid G1 is injected, the tip of the sensor pipe 30, which had been closed during pouring, is raised from the socket member 21 to form an open area S1. This prevents the open area S1 from being buried in crushed rock powder or the like during pouring, and allows the detection sensor 35 to detect (detect) the position of the foot hardening liquid G1.

[0030] According to this embodiment, the following effects can be obtained. (1-1) In the as-built management method of this embodiment, the as-built shape of the foot protection section formed between a steel pipe pile 10 in a rock layer B1 and the rock layer B1 is managed. In this method, the steel pipe pile 10 is placed at a predetermined depth in the rock layer B1, and the tip of the sensor pipe 30 extending in the central axis direction of the steel pipe pile 10 is inserted into a socket member 21 fixed to the steel pipe pile 10 at a height corresponding to a planned detection height DF1 of the foot protection liquid G1. Then, the steel pipe pile 10 is driven or erected in this state. When filling the foot protection liquid G1 between the steel pipe pile 10 and the rock layer B1, the relative positions of the socket member 21 and the sensor pipe 30 are changed. This change forms an open area S1 between the socket member 21 and the sensor pipe 30, and the filling status position of the foot protection liquid G1 (position of the liquid level height) is detected through this open area S1 by the detection sensor 35.

[0031] The as-built shape management device of this embodiment manages the as-built shape of the foot protection section formed between the steel pipe pile 10 in the rock layer B1 and the rock layer B1. This device includes a socket member 21 fixed to the steel pipe pile 10 at a height corresponding to a detection height DF1 of the foot protection liquid G1 planned when the steel pipe pile 10 is placed at a predetermined depth in the rock layer B1, a sensor pipe 30 extending in the central axis direction of the steel pipe pile 10 and openable to the outside at the liquid level by changing its position relative to the socket member 21, and a detection sensor 35 that detects the foot protection liquid G1 filled between the steel pipe pile 10 and the rock layer B1.

[0032] According to the above configuration, the steel pipe pile 10 is driven with the tip of the sensor pipe 30 inserted into the bottomed cylindrical socket member 21. This closes the interior of the tip of the sensor pipe 30 during driving, preventing crushed rock (rock crushing) generated during driving from entering the sensor pipe 30. Therefore, the detection sensor 35 can be smoothly positioned below the sensor pipe 30 through the hollow portion of the sensor pipe 30. Then, when the foot protection liquid G1 is injected, the detection sensor 35 is positioned in the open area S1 formed between the tip of the sensor pipe 30 and the socket member 21. This allows the detection sensor 35 exposed on the outer periphery of the steel pipe pile 10 to detect the cement milk (foot protection liquid G1) that has reached the detection height DF1 of the open area S1. This allows reliable confirmation that the foot protection liquid G1 has been filled up to the detection height DF1.

[0033] (1-2) In the finished product management method of this embodiment, the sensor pipe 30 is raised so that the tip of the sensor pipe 30 is positioned above the upper end of the socket member 21, thereby forming the open area S1. According to the above configuration, the detection sensor 35 can be brought into efficient contact with the root hardening solution G1. In addition, the detection sensor 35 can detect the liquid level of the root hardening solution G1, and it can be reliably determined that the root hardening solution G1 has been filled up to the detection height DF1.

[0034] (1-3) The steel pipe pile 10 of this embodiment is a steel pipe pile 10 to be driven into a bedrock layer B1, and has a cylindrical socket member 21 fixed at a height corresponding to the planned detection height DF1 of the root consolidation liquid G1 when placed at a predetermined depth in the bedrock layer B1, and a protective member 22 placed directly below the socket member 21 so as to cover the bottom surface of the socket member 21. According to the above configuration, deformation or damage to the bottom surface of the socket member 21 during pouring or the like can be suppressed.

[0035] (1-4) In this embodiment, multiple (two) sensor pipes 30 are arranged on the outer circumferential surface of the steel pipe pile 10. This allows multiple detection sensors 35 to be arranged at the detection height DF1, making it possible to reliably determine when the cement milk has reached the detection height DF1.

[0036] (1-5) In this embodiment, a stopper member 16 that stops the sensor pipe 30 from shaking is fixed above the socket member 21. This makes it possible to prevent the sensor pipe 30 from shaking significantly due to vibrations during pouring. In addition, the stopper member 16 can add a guide function when moving the sensor pipe 30 in the vertical direction.

[0037] (1-6) In this embodiment, an electrical conductivity sensor is used as the detection sensor 35. This allows the foot protection liquid G1 to be detected using electrical conductivity that is significantly different between cement milk as the foot protection liquid G1 and water, so that the filling of the foot protection liquid G1 can be reliably detected.

[0038] (Second embodiment) Next, a second embodiment that embodies the as-built management method, the method for pouring or erecting a core material, the as-built management device, and the core material will be described using Figures 5 and 6. In the above embodiment, the open area S1 was formed by pulling the sensor pipe 30 upward, but it is sufficient to form an open area S1 that is exposed to the liquid surface (detection position) of the foot protection liquid G1 filled around the steel pipe pile 10. For this reason, in this embodiment, the open area S1 is formed by rotating the sensor pipe 30, and the detection sensor 35 is placed in this open area S1. In this embodiment, parts similar to those in the above embodiment (including modified examples) are given the same reference numerals, and detailed description thereof will be omitted.

[0039] As shown in FIG. 5, multiple (two) socket members 26 are provided on the outer circumferential surface of the main pipe 11 of the steel pipe pile 10 at opposing positions, similar to the socket member 21. The socket members 26 are located slightly higher than the tip of the main pipe 11. The socket member 26 is a cylindrical body with a bottom, and is closed at the bottom side (the tip side of the main pipe 11) and open at the top side (the side opposite the tip of the main pipe 11), extending parallel to the central axis of the main pipe 11. Furthermore, multiple holes 26a, 26b, and 26c are formed vertically through the outer circumferential surface of the socket member 26 on the side opposite the main pipe 11. In this embodiment, the socket member 26 is fixed so that the center position of hole 26b is at a detection height DF2, which is the liquid level height that is the expected position of the uppermost liquid level of the foot protection liquid G1.

[0040] Furthermore, a protective member 22 is fixed to the tip side (lower side) of the socket member 26. Also, a plurality of stop members 16 are provided above the socket member 26 in the axial direction of the socket member 26 at predetermined intervals.

[0041] In the gun pile construction method of this embodiment, the sensor pipe 40 is also installed when the upper end of the steel pipe pile 10 is attached to a vibrating pile driver 50 such as a vibro hammer. 6(a), the sensor tube 40 used in this embodiment is a tube with the same configuration as the sensor tube 30 of the first embodiment, but with a plurality of holes 41, 42, 43 formed vertically in a row and penetrating the tip (lower end) of the tube. The height positions and sizes of the holes 41, 42, 43 of the sensor tube 40 are set so that they correspond to the holes 26a, 26b, 26c of the socket member 26, respectively, when the tip of the sensor tube 40 is fitted and housed in the socket member 26.

[0042] When installing the sensor tube 40, the tip of the sensor tube 40 is inserted through the opening at the top of the socket member 26. In this case, holes 41-43 of the sensor tube 40 face the main tube 11, and holes 26a-26c of the socket member 26 are closed with the outer peripheral surface of the sensor tube 40. Furthermore, the middle portion of the sensor tube 40 is engaged with the stopper member 16.

[0043] In this manner, the steel pipe pile 10 with the sensor pipe 40 attached is driven into the ground, and when the tip of the steel pipe pile 10 reaches the desired depth in the bedrock layer, the injection of water from the jet pipe 12 is stopped. Then, an open area S1 is formed. Here, as shown in Figure 6(b), the sensor tube 40 is rotated. As a result, the holes 41-43 facing the main body tube 11 are aligned with the holes 26a-26c of the socket member 26, respectively, and the holes 41-43 of the sensor tube 40 and the corresponding holes 26a-26c of the socket member 26 are connected to each other. As a result, the inside of the sensor tube 40 is opened to the outside by the aligned holes 26a-26c and holes 41-43, and an open area S1 is formed. Here, the detection height DF2 is located at the height of the centers of the aligned holes 26b and 42.

[0044] 6(c), the detection sensor 35 is inserted from above the sensor pipe 40 and placed at the detection height DF2. In this case, the external computer acquires the measurement values from the detection sensor 35 via the electric cable 36 placed inside the steel pipe pile 10.

[0045] From this point on, the same processing as in the first embodiment is carried out, and by detecting the electrical conductivity of the cement milk by the detection sensor 35, it can be determined that the foot protection liquid G1 has been filled up to the detection height DF2.

[0046] (action) In this embodiment, when injecting the foot protection liquid G1, the sensor pipe 40, which was closed during pouring, is rotated to align the holes 41-43 with the holes 26a-26c of the socket member 26, thereby forming an open area S1 that opens the inside of the sensor pipe 40 to the outside. As a result, the detection height DF2 is positioned at the open area S1 inside the sensor pipe 40, and the foot protection liquid G1 flows into the socket member 26 through the aligned holes 41-43, 26a-26c. As a result, the detection sensor 35 placed at the detection height DF2 can measure the electrical conductivity of the foot protection liquid G1 that is filled around the steel pipe pile 10 inside the sensor pipe 40.

[0047] In this embodiment, the same effects as those in (1-1) and (1-3) to (1-6) above can be obtained, and the following effects can also be obtained. (2-1) In the as-built management method of this embodiment, the socket member 26 is a cylinder having holes 26a-26c formed on its outer periphery as first holes and a bottom, and the sensor pipe 40 is a cylinder fitted into the socket member 26 having holes 41-43 formed as second holes that align with the holes 26a-26c. In this method, the core material (10) is poured or installed with the tip of the sensor pipe 40 inserted into the socket member 26 in an orientation such that the holes 26a-26c and the holes 41-43 as second holes are not aligned. Furthermore, the sensor pipe 40 is rotated to align and connect the holes 26a-26c and the holes 41-43, thereby forming the open area S1.

[0048] According to the above configuration, during concrete pouring, the holes 26a-26c of the socket member 26 are misaligned with the holes 41-43 of the sensor pipe 40 to create a closed space inside the sensor pipe 40, preventing crushed rock generated during concrete pouring from entering the sensor pipe 40. Therefore, the detection sensor 35 can be smoothly positioned below the sensor pipe 40. After the foot protection liquid G1 is poured (or before pouring), the sensor pipe 40 is rotated to align the holes 41-43 of the sensor pipe 40 with the holes 26a-26c of the socket member 26, the sensor pipe 40 is opened, and the detection sensor 35 is positioned. This exposes the detection sensor 35 to the outside of the main pipe 11. As a result, the foot protection liquid G1 filling the area around the steel pipe pile 10 through the holes 26b and 42 flows into the sensor pipe 40, allowing detection of whether the detection height DF2 has been reached via the holes 41-43 and 26a-26c.

[0049] The above describes the first and second embodiments of the as-built management method, the method of pouring or setting core material, the as-built management device, and the core material according to the present invention. However, the present invention is not limited to the above-mentioned first and second embodiments, and can be modified as appropriate within the scope of the spirit thereof, including modified examples of each embodiment. For example, the above-described first and second embodiments can be modified as follows: Each embodiment and the following modified examples can be implemented in combination with each other within the scope of technical compatibility. In the first embodiment, the steel pipe pile 10 is provided with two socket members 21 into which the tips of the sensor pipes 30 are inserted. Furthermore, in the second embodiment, the steel pipe pile 10 is provided with two socket members 26 into which the tips of the sensor pipes 40 are inserted. The configuration of the steel pipe pile 10 is not limited to the case where multiple socket members of the same type are provided. For example, the main pipe 11 of the steel pipe pile 10 may be provided with a socket member 21 and a socket member 26. In this case, the sensor pipes 30, 40 are inserted into the tips of the socket members 21, 26, respectively, during driving. After filling with the foot protection liquid G1, the relative positions of the socket members 21, 26 may be changed to form an open area S1, and the detection sensor 35 may be placed therein, as in the above-described embodiments.

[0050] In the above embodiments, two socket members 21 (26) are provided at opposing positions on the main pipe 11 of the steel pipe pile 10. The number and arrangement of the sensor pipes 30 (40) and the socket members 21 (26) into which their tips are inserted are not limited to this. A greater number of socket members may be provided, and the socket members do not need to be arranged at equal intervals.

[0051] In the above embodiments, the open area S1 is formed after the root protection liquid G1 is injected from the grout pipe 15, and the detection sensor 35 is placed in this open area S1. The timing of forming the open area S1 and the timing of placing the detection sensor 35 are not limited to this. For example, the open area S1 may be formed by moving the sensor pipes 30, 40 after the detection sensor 35 is placed. Furthermore, the sensor pipes 30, 40 inserted in the socket members 21, 26 may be moved to form the open area S1 and place the detection sensor 35 before injecting a pre-calculated injection amount of the root protection liquid G1.

[0052] In the above embodiments, the socket members 21, 26 are cylindrical and have a bottom. However, the shape of the socket member is not limited to this as long as the tip of the sensor tube 30, 40 can be inserted into the socket member. For example, the socket member may have a truncated cone shape whose diameter decreases downward.

[0053] In the above embodiments, the tip of the sensor pipe 30, 40 is fitted inside the socket member 21, 26. In this case, a protective member (e.g., putty) may be provided to fill the gap between the socket member 21, 26 and the sensor pipe 30, 40 during casting to prevent crushed rock powder from entering the sensor pipe 30, 40, and to be easily removed when forming the open area S1. For example, this protective member may be a member that falls off due to the force applied when the relative position of the sensor pipe 30, 40 with respect to the socket member 21, 26 is changed to form the open area S1.

[0054] In the second embodiment, the holes 41-43 were formed in the sensor tube 40 to align with the vertically aligned holes 26a-26c in the socket member 26. The multiple holes aligned with the sensor tube 40 may be aligned one by one, rather than all at once. Specifically, the multiple holes in the sensor tube 40 are aligned vertically (at different heights) and offset by 120 degrees around the outer periphery. This allows the holes (26a-26c) of the socket member 26 to be selectively aligned with the aligned holes (41-43) one by one depending on the amount of rotation of the sensor tube 40. In this case, the foot hardening liquid G1 flows into the socket member 26 through the aligned holes, and the height of the filled foot hardening liquid G1 can be determined based on the height of the holes that open to the outside due to the alignment.

[0055] In the above embodiments, an electrical conductivity sensor that measures electrical conductivity is used as the detection sensor 35. The detection sensor 35 may be any sensor that can measure physical property values that are significantly different from the properties of the root hardening solution G1, water, and air.

[0056] In the above embodiments, the core material is a steel pipe pile 10. However, the core material is not limited to the steel pipe pile 10, and may be a prefabricated pile such as a concrete pile, or a steel material such as a steel sheet pile or an H-shaped steel. The as-built management method of each of the above embodiments is applied to the gun pile method, in which the core material is driven or erected into the ground. The applicable construction method is not limited to the gun pile method, and other construction methods such as the inner trench method, the driving method, and the pre-boring method may also be used.

[0057] Next, the technical ideas that can be understood from the above-described embodiment and other examples will be described below. (a) The core material according to claim 6, characterized in that a stopper member for stopping the sensor tube from swinging is provided above the socket member. [Explanation of symbols]

[0058] B1...rock layer, G1...foot protection liquid, S1...open area, DF1, DF2...detection height as liquid level height, 10...steel pipe pile as core material, 11...main pipe, 12...jet pipe, 15...grout pipe, 16...stopping member, 21, 26...socket member, 22...protective member, 26a, 26b, 26c...holes as first hole, 41, 42, 43...holes as second hole, 30, 40...sensor pipe, 35...detection sensor, 36...electrical cable, 50...vibration pile driver.

Claims

1. A method for managing the finished shape of a foot protection part formed between a core material in the ground and the ground, The core material is placed at a predetermined depth in the ground, and a socket member is fixed to the core material at a height corresponding to the planned liquid level of the foot hardening liquid. The tip of the sensor pipe extending in the axial direction of the core material is inserted into the socket member, and the core material is poured or erected. This is a method for managing finished product, characterized in that when filling the root hardening liquid between the core material and the ground, the relative position of the socket member and the sensor pipe is changed, and the filling position of the root hardening liquid is detected by a detection sensor inserted into the sensor pipe from above through the open area formed at the liquid level by the change.

2. The method for managing finished product as described in claim 1, characterized in that the sensor tube is raised so that the tip of the sensor tube is positioned above the upper end of the socket member, and the inserted state is released to form the open area.

3. the socket member is a cylindrical body having a first hole formed in an outer periphery and a bottom, the sensor tube is a cylindrical body fitted into the socket member, the second hole of which is aligned with the first hole; The pouring or erecting is performed in a state where the tip of the sensor pipe is inserted into the socket member in an orientation where the first hole and the second hole are not aligned, The method for managing finished product as described in claim 1, characterized in that the open area is formed by rotating the sensor tube to align and connect the first hole and the second hole.

4. A method for installing or erecting a core material that forms a foot protection portion between a core material in the ground and the ground, a socket member for inserting a tip of a sensor pipe extending in the axial direction of the core member is fixed to the core member; The core material is poured or erected so that the socket member is located at a height corresponding to the liquid level of the root hardening liquid, The relative position of the socket member and the sensor pipe is changed so that the filling position of the foot hardening liquid can be detected by a detection sensor inserted into the sensor pipe from above, A method for pouring or erecting a core material, characterized by filling the base hardening liquid between the core material and the ground.

5. A work shape management device for managing the work shape of a foot protection part formed between a core material in the ground and the ground, A socket member fixed to the core material at a height corresponding to the planned liquid level of the foot hardening liquid when the core material is placed at a predetermined depth in the ground; a sensor tube extending in the axial direction of the core material, being provided so as to be fittable to the socket member, and being provided so that an open area that communicates the hollow portion with the outside is formed at the liquid level by changing a relative position of the sensor tube with respect to the socket member from a fitted state to the socket member; A finished product management device characterized by comprising a detection sensor that is inserted into the sensor pipe from above and detects the root strengthening liquid filled between the core material and the ground through the open area.

6. A core material to be installed in the ground, a cylindrical socket member that is fixed at a height corresponding to the planned liquid level of the foot hardening liquid when placed at a predetermined depth in the ground, and that forms an open area in which the detection sensor inserted into the sensor pipe from above detects the foot hardening liquid by changing the relative position of the fitted sensor pipe; and a protective member fixedly disposed directly below the socket member.

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