Grout material adding and filling method and grout material filling height management system

Abstract

To add and fill a proper amount of a grout material with respect to the inside of a pipe member.SOLUTION: A detection device 110 is provided which detects, along an axial direction of a tremie pipe T, a position of a water surface inside a pipe material 1 and a position of an upper end surface of a grout material g inside the pipe material 1. The detection value of the detection device 110 is outputted to a computer 100 via a communication cable not shown in the figure. During filling work of the grout material g, until the upper end position of the grout material g inside the pipe member 1 and the upper end position of the grout material g in an annular space reach at least a water bottom ground G (the position of the water bottom ground surface before the pipe member 1 is inserted into the water bottom ground), draining of the water inside the pipe member 1 and adding and filling of the grout material into the pipe member 1 from the tremie pipe are repeated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a technique for additionally filling grout material into the inside of a pipe member inserted into a water bottom ground. [Background technology]

[0002] When filling various grout materials such as mortar into underwater structures, it is important to manage the amount of grout filling. For example, Patent Document 1 describes that a pressure sensor for measuring the grout injection pressure, a flowmeter for measuring the flow rate of injected grout per unit time, and an integrating flowmeter for measuring the integrated amount over time are provided between a pressure pump and a grout injection port of a cable sheath, and the time transition of the measurement data outputted from the pressure sensor, flowmeter, and integrating flowmeter at every moment is displayed on a display. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-133395 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, Fig. 11 is a diagram for explaining a problem that occurs when grout material g is conventionally filled inside a pipe member 1 such as a steel pipe pile inserted into a water bottom ground G. In Fig. 11, when grout material g is filled into the inside of the pipe member 1 from a tremie pipe (not shown), the grout material g is also filled into the outer circumferential surface of the pipe member 1 and the gap W1 (called annular space) of the water bottom ground through the gap W2 between the lower end of the pipe member 1 and the water bottom ground G. Because seawater exists inside the pipe member 1 before filling with the grout material g, the water level S2 inside the pipe member 1 becomes higher than the water level S1 (tide level) outside the pipe member 1 as the grout material g is filled.

[0005] Therefore, a certain amount of the grout material g filled from the tremie pipe flows out into the water from the upper end of the annular space, as shown by the arrow A in Fig. 11. As a result, even if the filling of the target amount of grout material g is completed, the top height of the grout material g inside the pipe member 1 will be lower than the top height of the grout material g outside the pipe member 1 (annular space), and the amount of grout material g filled inside the pipe member 1 will be insufficient.

[0006] Therefore, an object of the present invention is to additionally fill an appropriate amount of grout material into the inside of a pipe member. [Means for solving the problem]

[0007] In order to solve the above problems, the grout material filling method of the present invention is a grout material filling method in which grout material is filled into the inside of a pipe member inserted into the water bottom ground from a tremie pipe placed inside the pipe member, and grout material is filled into the gap between the outer surface of the pipe member and the water bottom ground and the gap between the lower end of the pipe member and the water bottom ground through the gap between the lower end of the pipe member and the water bottom ground, and the drainage of water from inside the pipe member and additional filling of the grout material from the tremie pipe into the inside of the pipe member are repeated until the upper end position of the grout material inside the pipe member and the upper end position of the grout material in the gap between the outer surface of the pipe member and the water bottom ground reach at least the water bottom ground.

[0008] The grout material may be filled up to the bottom of the water in the gap between the outer surface of the pipe member and the bottom of the water and in the gap between the lower end of the pipe member and the bottom of the water, and then the water inside the pipe member is drained again and the grout material is filled into the inside of the pipe member.

[0009] The water surface position inside the pipe member and the position of the upper end face of the grout material inside the pipe member are detected, and Vg=π×(d / 2) is calculated by assuming that d is the inner diameter of the pipe member, h1 is the distance from the bottom ground to the water surface inside the pipe member, h2 is the distance from the upper end face of the grout material inside the pipe member to the bottom ground, and H is the distance from the bottom ground to the water surface outside the pipe member. 2 Filling volume V calculated by ×h2 g Fill with grout and V w =π×(d / 2) 2 × (h1-H) Displacement volume V calculated w The drainage may be performed by

[0010] The grout filling height management system of the present invention is a grout filling height management system that fills the inside of a pipe member inserted into the water bottom ground with grout from a tremie pipe arranged inside the pipe member, and fills the grout material into the outer circumferential surface of the pipe member and the gap of the water bottom ground through a gap between the lower end of the pipe member and the water bottom ground, and is equipped with a drainage device that drains water from inside the pipe member, and a detection device that detects the position of the water surface inside the pipe member and the position of the upper end face of the grout material inside the pipe member, respectively, and satisfies the following equation: Vg=π×(d / 2) where d is the inner diameter of the pipe member, h1 is the distance from the water bottom ground to the water surface inside the pipe member, h2 is the distance from the upper end face of the grout material inside the pipe member to the water bottom ground, and H is the distance from the water bottom ground to the water surface outside the pipe member. 2 Filling volume V calculated by ×h2 g Fill with grout and V w =π×(d / 2) 2 × (h1-H) Displacement volume V calculated w Drain the water.

[0011] The detection device may be any of a fiber optic sensor, a pressure gauge, a thermocouple sensor, a pH meter, and a density meter.

[0012] When the detection device is constituted by an optical fiber sensor, the optical fiber sensor may include an optical fiber arranged along the axial direction of the tremie tube on at least either the inner surface of the pipe member or the tremie tube, or both, and a detection member shaped to increase the deformation of the optical fiber when pressure from water or grout material is applied to the optical fiber. Effect of the Invention

[0013] According to the present invention, it is possible to additionally fill the inside of the pipe member with an appropriate amount of grout material. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a diagram showing an overview of a grout filling height management system provided in a pipe member in one embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram showing a hardware configuration of a grout filling height management system. [Diagram 3] FIG. 2 is a diagram illustrating the structure of a detection device provided in the grout filling height management system. [Figure 4] FIG. 2 is a diagram illustrating the structure of a detection device provided in the grout filling height management system. [Diagram 5] 4 is a flowchart showing the operation of the grout filling height management system. [Figure 6] 1A to 1C are diagrams showing a process of filling grout material in this embodiment. [Figure 7] 1A to 1C are diagrams showing a process of filling grout material in this embodiment. [Figure 8] 1A to 1C are diagrams showing a process of filling grout material in this embodiment. [Figure 9] 1A to 1C are diagrams showing a process of filling grout material in this embodiment. [Figure 10] 1A to 1C are diagrams showing a process of filling grout material in this embodiment. [Figure 11]FIG. 1 is a diagram illustrating a problem that occurs when grout material is filled into a pipe member inserted into a water bottom ground in the conventional method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An example of an embodiment for carrying out the present invention will be described. In FIG. 1, the pipe member 1 is, for example, a hollow steel pipe pile, and a part of its longitudinal direction is inserted into the water bottom ground G. A tremie pipe T and a drainage pipe D are arranged inside the pipe member 1 (hollow space). The grout material g is filled into the inside of the pipe member 1 through the tremie pipe T. The grout material g is filled from the bottom to the top inside the pipe member 1, and is filled into the outer circumferential surface of the pipe member 1 and the gap W1 (annular space) of the water bottom ground through the gap W2 between the lower end of the pipe member 1 and the water bottom ground. The water (here, seawater) present inside the pipe member 1 is drained to the outside of the pipe member 1 through the drainage pipe D by driving a pump not shown.

[0016] A detection device 110 is provided along the axial direction of the tremie pipe T to detect the water surface position inside the pipe member 1 and the position of the upper end surface of the grout material g inside the pipe member 1. The detection value of this detection device 110 is output to a computer 100 (FIG. 2), which will be described later, via a communication cable (not shown).

[0017] This embodiment is characterized in that during the filling operation of the grout material g, drainage from the inside of the pipe member 1 and additional filling of grout material from the tremie pipe T into the inside of the pipe member 1 are repeated until the upper end position of the grout material g inside the pipe member 1 and the upper end position of the grout material g in the annular space reach at least the water bottom ground G (the position of the water bottom ground surface before the pipe member 1 is inserted into the water bottom ground).

[0018] 2 is a block diagram showing a hardware configuration of a grout filling height management system provided on a work ship or the like that fills the grout material g. The grout filling height management system includes the above-mentioned detection device 110, a filling device 120 including the above-mentioned tremie pipe T and the like that fills the inside of the pipe member 1 with grout material g, a drainage device 130 including the above-mentioned drain pipe D and the like that drains water from the inside of the pipe member 1, and a computer 100 communicably connected to the detection device 110, the filling device 120, and the drainage device 130. The computer 100 acquires a detection value of the detection device 110, and controls the filling device 120 and the drainage device 130 using the acquired detection value.

[0019] 3 and 4 are diagrams illustrating the structure of the detection device 110. In FIG. 3(A), the detection device 110 is configured by an optical fiber sensor, and includes an optical fiber 111 arranged along the axial direction of the tremie pipe, and detection members 112 and 113 shaped to increase the deformation amount of the optical fiber when pressure from water or grout material is applied to the optical fiber. The detection member 112 has a convex portion 115, and the detection member 113 has a concave portion 116 shaped to mesh with the convex portion 115. The optical fiber 111 is laid in the gap between the convex portion 115 and the concave portion 116 along the axial direction, and the detection members 112 and 113 are connected by a connection member 114 so as to be movable in the direction connecting the detection members 112 and 113. A set of structures consisting of the detection members 112, 113, and the connection member 114 is provided at sufficiently short intervals along the axial direction of the tremie pipe T.

[0020] As shown in FIG. 3B, when pressure from water or grout material is applied to the detection member 112 and the optical fiber 111 in the direction of the arrow a, the convex portion 115 of the detection member 112 moves to press the optical fiber 111 against the concave portion 116, thereby deforming the optical fiber 111. Modulation components are generated in the phase, wavelength, refractive index, etc. of the light passing through the optical fiber in response to such deformation, so that it is possible to detect the position of the optical fiber 111 arranged along the axial direction of the tremie tube T where pressure is applied. Furthermore, since the principle of such an optical fiber sensor has a very high sensitivity of about 10με in resolution, it is possible to distinguish the detection values ​​of water and grout material from the specific gravity difference between them. Therefore, the position of the water surface inside the pipe member 1 and the position of the upper end surface of the grout material g inside the pipe member 1 can be detected, respectively.

[0021] In Fig. 4(A), the detection device 110 is composed of an optical fiber sensor, and includes an optical fiber 111 arranged along the axial direction of the tremie pipe, and two detection members 117 shaped to increase the amount of deformation of the optical fiber when pressure from water or grout material is applied to the optical fiber. The two detection members 117 are arranged at a predetermined interval, and each has a convex portion 118. A plurality of such structures each consisting of two detection members 117 are provided at sufficiently short intervals along the axial direction of the tremie pipe T.

[0022] 4(B), when pressure from water or grout material is applied to the optical fiber 111 in the direction of arrow a, the optical fiber 111 is pressed between two detection members 117, deforming the optical fiber 111. Modulation components are generated in the phase, wavelength, refractive index, etc. of the light passing through the optical fiber in response to such deformation, making it possible to detect at which position on the optical fiber 111 arranged along the axial direction of the tremie tube T and to what degree of pressure is being applied, that is, the position of the water surface inside the tube member 1 and the position of the upper end face of the grout material g inside the tube member 1.

[0023] The optical fiber 111 described above may be arranged at least on either or both of the inner circumferential surface of the tube member 1 and the tremie tube T along the axial direction of the tremie tube T. When the optical fiber 111 is arranged on the inner circumferential surface of the tube member 1, it is desirable to provide a plurality of optical fibers (three or more locations) at approximately equal intervals in the circumferential direction of the inner circumferential surface of the tube member 1 in order to uniformly detect the height of the grout material g in the tube member 1 in the circumferential direction of the tube member 1.

[0024] Fig. 5 is a flow chart showing the operation of the grout filling height management system, and Figs. 6 to 10 are diagrams showing the process of filling grout in this embodiment. In Fig. 5, when filling of grout g starts, the computer 100 acquires the detection value of the detection device 110 (step S11) and detects the position of the water surface inside the pipe member 1 and the position of the upper end surface of the grout g inside the pipe member 1 (step S12).

[0025] As shown in Fig. 6, when filling of the grout material g starts, the water level S2 inside the pipe member 1 becomes higher than the water level S1 (tide level) outside the pipe member 1. If filling of the grout material g continues like this, the upper end of the grout material filled in the annular space approaches the water bottom ground G, as shown in Fig. 7.

[0026] Here, d is the inner diameter of the pipe member 1, h1 is the distance from the water bottom ground G to the water surface inside the pipe member 1, h2 is the distance from the upper end face of the grout material g inside the pipe member 1 to the water bottom ground G, and H is the distance from the water bottom ground G to the water surface outside the pipe member 1. Note that H is a known value, and h1 and h2 can be obtained from the position of the water surface inside the pipe member 1, the position of the upper end face of the grout material g inside the pipe member 1, the position of the water surface outside the pipe member 1, and the position of the water bottom ground G.

[0027] In FIG. 5, the computer 100 calculates the formula V g =π×(d / 2) 2 Filling volume V calculated by ×h2 g Fill the grout material with formula V w=π×(d / 2) 2 × (h1-H) Displacement volume V calculated w The computer 100 controls the filling device 120 and the draining device 130 to drain the water by the amount of grouting (step S13). At this time, it is preferable that the computer 100 fills the grout material g in the annular space and the gap between the lower end of the pipe member 1 and the water bottom ground up to the water bottom ground (the ground surface before the pipe member 1 is inserted), and then drains the water from inside the pipe member 1 and fills the inside of the pipe member 1 with grout material again. This is because, in the process of filling the grout material g in the annular space and the gap between the lower end of the pipe member 1 and the water bottom ground up to the water bottom ground, the filling can be easily performed by using the weight of the grout material g filled inside the pipe member 1.

[0028] By repeating such filling and draining under the control of the computer 100, it is possible to make the position of the upper end of the grout material g filled inside the pipe member 1, the upper end of the grout material g filled in the annular space, and the water bottom ground G almost coincident with each other, as shown in Figs. 8 to 10. Note that, at the time of Fig. 10, h2 = 0 and h1 = H. When filling of the grout material up to the target height as shown in Fig. 10 is completed (step S14: YES in Fig. 5), the control of filling and draining of the grout material by the computer 100 ends.

[0029] According to the above embodiment, by using the position of the water surface inside the pipe member 1 and the position of the upper end face of the grout material g inside the pipe member 1, it is possible to additionally fill an appropriate amount of grout material into the inside of the pipe member 1. This makes it possible to solve various problems, such as, for example, the finished shape of the grout material g filled inside the pipe member 1 is insufficient, and the designed pull-out resistance is not satisfied, a large amount of grout material g flows out to the outside of the pipe member 1, and when the completion of filling of the grout material g is visually confirmed by a diver, the visibility is reduced due to turbidity caused by the grout material g leaked to the outside of the pipe member 1, and the diving time is prolonged. In addition, by measuring the grout material filling height, which is the position of the upper end face of the grout material g inside the pipe member 1, and the water level inside the pipe member, which is the position of the water surface outside the pipe member 1, respectively, it is possible to indirectly estimate the additional filling amount of grout material and the drainage amount.

[0030] The above embodiment may be modified as follows: For example, in the above embodiment, an optical fiber sensor is used as the detection device 110, but instead of this, a detection device constituted by any one of a pressure gauge, a thermocouple sensor, a pH meter, and a density meter may be used. [Explanation of symbols]

[0031] 1: pipe member, 100: computer, 110: detection device, 111: optical fiber, 112, 113, 117: detection member, 114: connection member, 115, 118: convex portion, 116: concave portion, 120: filling device, 130: drainage device, T: tremie pipe, D: drainage pipe, G: water bottom ground, g: grout material, W1, W2: gaps.

Claims

1. A grout material additional filling method for filling a grout material into a pipe member inserted into a water bottom ground from a tremie pipe disposed inside the pipe member, and filling a gap between an outer peripheral surface of the pipe member and the water bottom ground and a gap between a lower end of the pipe member and the water bottom ground through the gap between the lower end of the pipe member and the water bottom ground, comprising: A grout material additional filling method that repeats draining of water from inside the pipe member and additional filling of the grout material from the tremie pipe into the inside of the pipe member until the upper end position of the grout material inside the pipe member and the upper end position of the grout material in the gap between the outer surface of the pipe member and the water bottom ground reach at least the water bottom ground.

2. The grout material is filled up to the bottom of the water in the gap between the outer circumferential surface of the pipe member and the bottom of the water and in the gap between the lower end of the pipe member and the bottom of the water, and then the water inside the pipe member is drained and the grout material is filled into the inside of the pipe member again. The method for additionally filling grout material according to claim 1.

3. Detecting the water surface position inside the pipe member and the position of the upper end surface of the grout material inside the pipe member, d is the inside diameter of the tubular member; h 1 is the distance from the bottom of the water to the water surface inside the pipe member, h 2 is the distance from the upper end surface of the grout material inside the pipe member to the bottom ground, If H is the distance from the bottom of the water to the water surface outside the pipe member, V g =π×(d / 2) 2 ×h 2 The filling volume V calculated by g Fill with grout material, V w =π×(d / 2) 2 ×(h 1 -H) The displacement V calculated by w Drain the water with The method for additionally filling grout material according to claim 1.

4. A grout filling height management system for filling a grout material into a pipe member inserted into a water bottom ground from a tremie pipe disposed inside the pipe member, and filling a grout material into an outer peripheral surface of the pipe member and a gap in the water bottom ground through a gap between a lower end of the pipe member and the water bottom ground, A drainage device for draining water from inside the pipe member; a detection device for detecting a water surface position inside the pipe member and a top end surface position of the grout material inside the pipe member, d is the inside diameter of the tubular member; h 1 is the distance from the bottom of the water to the water surface inside the pipe member, h 2 is the distance from the upper end surface of the grout material inside the pipe member to the bottom ground, If H is the distance from the bottom of the water to the water surface outside the pipe member, V g =π×(d / 2) 2 ×h 2 The filling volume V calculated by g Fill with grout material, V w =π×(d / 2) 2 ×(h 1 -H) The displacement V calculated by w Drain the water with Grout filling height control system.

5. The detection device includes: It is composed of one of the following: an optical fiber sensor, a pressure gauge, a thermocouple sensor, a pH meter, or a density meter. The grout filling height control system according to claim 4.

6. When the detection device is configured by an optical fiber sensor, The optical fiber sensor includes: an optical fiber arranged at least on an inner peripheral surface of the tubular member or on the tremie tube, or on both of the tremie tube and the optical fiber arranged along an axial direction of the tremie tube; a detection member having a shape that increases the deformation amount of the optical fiber when pressure from water or grout material is applied to the optical fiber; The grout filling height control system according to claim 4.

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