Grout material filling management system and grout material filling management method

Abstract

To estimate a filling height of grout material inside a pipe component, and to drain seawater present inside the pipe component and manage the same so that the filling height of the grout material is secured.SOLUTION: During a filling operation of a grout material g, a water level inside a pipe member 1, a water level (tide level) outside the pipe member 1, and pressure at a bottom end of the pipe member 1 are detected, and these detected values are used for estimating in real time a filling height of the grout material g inside the pipe member 1. Specifically, when density of water is γw, the density of the grout material g is γG, hydrostatic pressure inside the pipe member 1 is P0, and the pressure obtained by a pressure sensor 111 during the filling operation of the grout material g is P1, a distance x from an upper end surface of the grout material g to a position of the pressure sensor 111 (i.e., the filling height x of the grout material inside the pipe member 1) is calculated by x=(P1-P0) / (γG-γw).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a technique for managing the filling of grout material into the inside of a pipe member inserted into a water bed. [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. 5 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. 5, 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] Due to the difference in head between inside and outside the pipe member 1, a certain amount of the grout material g filled from the tremie pipe will flow out from the top of the annular space into the water as shown by the arrow A. 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. This may result in, for example, the finished shape of the grout material g filled inside the pipe member 1 being insufficient, not satisfying the designed pull-out resistance, causing a large amount of grout material g to flow out of the pipe member 1, and when the completion of filling of the grout material g is visually confirmed by a diver, there may be various problems such as a decrease in visibility due to turbidity caused by the grout material g leaked outside the pipe member 1 and a prolonged diving time.

[0006] Therefore, the present invention aims to estimate the filling height of grout material inside the pipe member, and to drain the seawater present inside the pipe member so as to manage the filling height of grout material (finished form) so as to ensure it. [Means for solving the problem]

[0007] In order to solve the above problems, the grout filling management system of the present invention is a grout filling management system that fills the inside of a pipe member inserted into the water bottom ground with grout material from a tremie pipe placed inside the pipe member, and fills the grout material into the outer surface of the pipe member and the gap in the water bottom ground through the gap between the lower end of the pipe member and the water bottom ground, and estimates in real time the height of the upper end surface of the grout material inside the pipe member during the grout filling operation.

[0008] The pipe member may be provided with a detection device for detecting the pressure of the grout material filled in the pipe member, the position of the water surface inside the pipe member, and the position of the water surface outside the pipe member, and the position of the water surface outside the pipe member may be estimated in real time by calculating x=(P1-P0) / (γG-γw) where h is the difference between the water surface inside the pipe member and the water surface outside the pipe member, H1 is the distance from the water bottom surface to the water surface outside the pipe member, H2 is the distance from the water bottom surface to the detection device that detects the pressure of the grout material filled in the pipe member, x is the distance from the upper end surface of the grout material to the detection device, γw is the density of the water, γG is the density of the grout material, P0 is the hydrostatic pressure inside the pipe member, and P1 is the pressure obtained by the detection device during the grout material filling operation.

[0009] The pipe member may be provided with a drainage device for draining water from the inside thereof, and grout material may be filled into the inside of the pipe member, as well as into the gaps between the outer surface of the pipe member and the bottom ground until the pressure P1 becomes equal to P1 = H1 x γw + H2 x γG. If the drainage speed for draining water from the inside of the pipe member is v, the grout material may be filled at a filling speed vG calculated by vG = (γw / γG) x v. Drainage within the pipe member and additional filling of grout material may be performed until the pressure P2 of the grout material filled in the pipe member becomes equal to P2 = H1 x γw + H2 x γG.

[0010] In addition to or instead of draining the inside of the pipe member and filling with additional grout material until the pressure P2 of the grout material filled in the pipe member becomes P2 = H1 x γw + H2 x γG, water of a volume Vw calculated by Vw = π x (d / 2)^2 x h may be drained from the inside of the pipe member.

[0011] A detection device for detecting the pressure of the grout material filled in the pipe member may be provided at the lower end of the pipe member or at the lower end of the tremie pipe.

[0012] A detection device for detecting the pressure of the grout material filled in the pipe member may be provided at a position not more than 1 / 3 of the way from the bottom of the insertion length of the pipe member into the water bottom ground.

[0013] The grout filling management method according to the present invention is a grout filling method for filling the inside of a pipe member inserted into the water bottom ground with grout material from a tremie pipe arranged inside the pipe member, and filling the grout material into the outer circumferential surface of the pipe member and the gap in the water bottom ground through a gap between the lower end of the pipe member and the water bottom ground, the grout material filling method detects the pressure of the grout material filled in the pipe member, the position of the water surface inside the pipe member, and the position of the water surface outside the pipe member, respectively, and defines the difference between the water surface inside the pipe member and the water surface outside the pipe member as h, the distance from the water bottom surface to the water surface outside the pipe member as H1, the distance from the water bottom surface to a detection device that detects the pressure of the grout material filled in the pipe member as H2, the distance from the upper end surface of the grout material to the detection device as x, the density of water as γw, the density of the grout material as γG, and the pressure inside the pipe member as h, In the first step, the position x of the upper end of the grout material filled in the pipe member is estimated in real time, which is calculated by x=(P1-P0) / (γG-γw), where P0 is the hydrostatic pressure in the pipe member and P1 is the pressure obtained by the detection device during the grout filling operation. In the second step, the pressure P1 of the grout material filled in the pipe member is calculated by P1=H1×γw+H2×γG, and the pressure P1 of the grout material filled in the pipe member and the inside of the pipe member are measured. In a third step, grout material is filled into the outer surface of the pipe member and into the gaps in the water bed. In a fourth step, drainage and additional filling of grout material is performed inside the pipe member until the pressure P2 of the grout material filled in the pipe member becomes P2 = H1 x γw + H2 x γG.

[0014] In addition to or instead of draining water from the inside of the pipe member until the pressure P2 of the grout material filled in the pipe member becomes P2 = H1 x γw + H2 x γG, water of a volume Vw calculated by Vw = π x (d / 2)^2 x h may be drained from the inside of the pipe member and additional grout material may be filled. Effect of the Invention

[0015] According to the present invention, it is possible to estimate the filling height of grout material inside a pipe member. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a diagram showing an overview of a grout filling management system provided in a pipe member in one embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing an overview of a grout filling management system provided in a pipe member in one embodiment of the present invention. [Diagram 3] FIG. 2 is a block diagram showing a hardware configuration of a grout material filling management system. [Figure 4] 4 is a flowchart showing the operation of the grout material filling management system. [Diagram 5] 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

[0017] An example of an embodiment for carrying out the present invention will be described. In Figs. 1 and 2, 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 (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.

[0018] A pressure sensor 111 for detecting the pressure of the grout material g filled inside the pipe member 1 is provided at a position of 1 / 3 or less from the bottom of the insertion length of the pipe member 1 into the water bottom ground G, more preferably at the position of the lower end of the pipe member 1. The detection value of this pressure sensor 111 is output to a computer 100 (FIG. 3) described later via a communication cable (not shown).

[0019] A water level sensor, such as a radio wave type or float type (not shown in Figs. 1 and 2, but shown as water level sensor 112 in Fig. 3), is provided at a predetermined position on the inner circumferential surface of the pipe member 1 in order to detect the water level inside the pipe member 1. The detection value of this water level sensor 112 is output to the computer 100 (Fig. 3) via a communication cable (not shown).

[0020] Furthermore, in this embodiment, a tide level sensor (not shown in Figs. 1 and 2, but shown as tide level sensor 113 in Fig. 3) is provided to detect the water level (tide level) outside the pipe member 1. The detection value of this tide level sensor 113 is output to the computer 100 (Fig. 3) via a communication cable (not shown). For example, if tide level data can be obtained from NOWPHAS (Nationwide Ocean Wave information network for Ports and HArbourS) or the like, installation of the tide level sensor may be omitted.

[0021] In this embodiment, during the filling operation of the grout material g, the water level inside the pipe member 1, the water level (tide level) outside the pipe member 1, and the pressure at the lower end of the pipe member 1 are each detected, and these detected values ​​are used to estimate the filling height of the grout material g inside the pipe member 1 in real time.

[0022] 3 is a block diagram showing a hardware configuration of a grout material filling management system provided on a work ship or the like that fills the grout material g. The grout material filling management system includes a detection device 110 including a pressure sensor 111 that detects the pressure of the grout material g filled in the pipe member 1, a water level sensor 112 that detects the water level (position of the water surface) inside the pipe member 1, and a tide level sensor 113 that detects the position of the water surface (tide level) outside the pipe member 1, a filling device 120 that includes the above-mentioned tremie pipe T and the like and fills the inside of the pipe member 1 with the grout material g, a drainage device 130 that includes the above-mentioned drain pipe D and the like and drains water from the inside of the pipe member 1, and a computer 100 that is communicably connected to the detection device 110, the filling device 120, and the drainage device 130. The computer 100 acquires the detection value of the detection device 110, and controls the filling device 120 and the drainage device 130 using the acquired detection value.

[0023] 1 and 2, the difference between the water surface inside the pipe member 1 and the water surface outside the pipe member 1 is defined as h, the distance from the water bottom surface to the water surface outside the pipe member 1 is defined as H1, the distance from the water bottom surface to the grout material g filled in the pipe member 1 (i.e., the position of the pressure sensor 111) is defined as H2, and the position from the upper end surface of the grout material g to the pressure sensor 111 is defined as x. Furthermore, the density of the water (seawater in this case) is defined as γw, and the density of the grout material g is defined as γG. The computer 100 estimates the position x of the upper end of the grout material g filled in the pipe member 1 in real time as follows.

[0024] Here, if the hydrostatic pressure inside the pipe member 1 is P0 and the pressure obtained by the pressure sensor during the filling operation of the grout material g is P1, the pressure P1 detected by the pressure sensor 111 during filling of the grout material g is P1 = {h + H1 + (H2 - x)} × γw + x × γG =(h+H1+H2)×γw+(γG-γw)×x It becomes.

[0025] In the above formula, the first term on the right side, "(h+H1+H2)×γw," indicates the hydrostatic pressure P0 inside the pipe member 1, and is therefore a known value. In addition, the unit volume weight γG of the grout material g can also be determined from a predetermined recipe. Therefore, the distance x from the upper end surface of the grout material g to the position of the pressure sensor 111 (i.e., the filling height x of the grout material inside the pipe member 1) can be calculated by modifying the above formula as follows: x = (P1-P0) / (γG-γw) It is calculated as follows.

[0026] 2, in a state where the grout material g filled in the gap W2 (annular space) has reached the water bottom surface, the head difference between the inside and outside of the pipe member 1 is kept in balance at the position of the lower end of the pipe member 1. Therefore, when the pressure P2 detected by the pressure sensor 111 at the lower end of the pipe member 1 becomes P2=H1×γw+H2×γG, the computer 100 may determine that filling of the grout material g into the gap W2 (annular space) is completed.

[0027] However, in the state of FIG. 2, the top height of the grout material g inside the pipe member 1 does not meet the target filling height. Therefore, it is necessary to fill (additionally fill) the grout material g equivalent to the shortage while draining from the inside of the pipe member 1. In this case, it is necessary to perform drainage from the inside of the pipe member 1 and filling of the grout material g from the inside of the pipe member 1 in the state of FIG. 2 so that the detected pressure at the lower end of the pipe member 1 does not change. In other words, if the drainage weight > the filling weight, the outside side of the head difference between the inside and outside of the pipe member 1 becomes higher, the grout material g flows back into the pipe member 1, and the grout material g filled in the annular space is likely to involve seawater and reduce the adhesive force of the grout material g. On the other hand, if the drainage weight < the filling weight, the inside side of the head difference between the inside and outside of the pipe member 1 becomes higher, and the grout material g flows out from the inside of the pipe member 1 to the outside. Therefore, drainage and filling of the grout material g should be performed while maintaining the drainage weight = filling weight.

[0028] Here, when the drainage speed of the drainage device 130 is v, the filling speed vG of the grout material g is vG = (γw / γG) × v The computer 100 may perform drainage and filling of the grout material g while maintaining such a relationship between the drainage rate v and the filling rate vG of the grout material g.

[0029] The time when water drainage from the pipe member 1 ends is when the detection value of the pressure sensor 111 becomes P2 = H1 x γw + H2 x γG, or when a volume of water Vw = π x (d / 2)^2 x h has been drained, where d is the diameter of the pipe member.

[0030] As described above, the computer 100 fills the inside of the pipe member 1 and the gaps between the outer circumferential surface of the pipe member 1 and the bottom ground G with grout material g until the pressure P1 becomes P1 = H1 x γw + H2 x γG. Then, when the drainage speed at which water is drained from the inside of the pipe member 1 is v, the computer 100 fills the grout material at a filling speed vG calculated by vG = (γw / γG) x v, and performs drainage inside the pipe member 1 and additional filling of grout material g until the pressure P2 of the grout material g filled in the pipe member 1 becomes P2 = H1 x γw + H2 x γG.

[0031] Next, the operation of this embodiment will be described. Fig. 4 is a flow chart for explaining the process of filling the grout material g. In Fig. 4, when filling of the grout material g is started, the computer 100 obtains detection values ​​of the pressure of the grout material g filled in the pipe member 1, the position of the water surface inside the pipe member 1, and the position of the water surface outside the pipe member 1 from the detection device 110 (step S1).

[0032] Next, the computer 100 estimates the position x of the upper end of the grout material g in real time (step S2). Specifically, the computer 100 estimates the position x according to the above-mentioned formula x=(P1-P0) / (γG-γw) (first step).

[0033] Next, the computer 100 controls the filling amount and the drainage amount (step S3). Specifically, the computer 100 fills the inside of the pipe member 1 and the gaps between the outer peripheral surface of the pipe member 1 and the bottom ground G with the grout material g until the pressure P1 of the grout material g filled in the pipe member 1 becomes P1=H1×γw+H2×γG (second process), and fills the grout material g at a filling speed vG calculated by vG=(γw / γG)×v, where v is the drainage speed at which water is drained from the inside of the pipe member 1 (third process).

[0034] Then, the computer 100 drains the inside of the pipe member 1 and fills additional grout material g until the pressure P2 of the grout material g filled in the pipe member 1 becomes P2 = H1 x γw + H2 x γG (step S4; YES) (fourth process).

[0035] Although drainage from the pipe member 1 may be performed simultaneously with filling with the grout material g, it is preferable to perform drainage after the gap W2 (annular space) is completely filled. This is because the efficiency of filling the gap W2 (annular space) with the grout material is improved by maintaining a high internal head difference between the inside and outside of the pipe member 1.

[0036] According to the above embodiment, it is possible to estimate the filling height of the grout material g inside the pipe member 1 by using the water level inside the pipe member 1, the water level (tide level) outside the pipe member 1, and the pressure of the grout material g at the lower end of the pipe member 1. This makes it possible to solve various problems, such as the grout material g filled inside the pipe member 1 being insufficient in shape and not satisfying the designed pull-out resistance, a large amount of grout material g leaking out of the pipe member 1, and when the completion of filling of the grout material g is visually confirmed by a diver, reduced visibility due to turbidity caused by the grout material g leaked out of the pipe member 1 and longer diving time.

[0037] The above embodiment may be modified as follows. For example, in the above embodiment, the inside of the pipe member 1 is drained and the grout material g is additionally filled until the pressure P2 of the grout material filled in the pipe member 1 becomes P2 = H1 x γw + H2 x γG. In addition to or instead of this drainage and additional filling, water of a volume Vw calculated by Vw = π x (d / 2)^2 x h may be drained from the inside of the pipe member 1.

[0038] The pressure sensor 111 may be provided at the lower end of the tremie tube T in addition to the lower end of the tube member 1. [Explanation of symbols]

[0039] 1: pipe member, 100: computer, 110: detection device, 111: pressure sensor, 112: water level sensor, 113: tide level sensor, 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 filling 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 gap between a lower end of the pipe member and the water bottom ground with grout material into an outer peripheral surface of the pipe member and the gap between the water bottom ground, A grout filling management system that estimates in real time the height of the upper end surface of the grout material inside the pipe member during the grout filling operation.

2. a detection device for detecting a pressure of the grout material filled in the pipe member, a water surface position inside the pipe member, and a water surface position outside the pipe member; Let h be the difference between the water level inside the pipe member and the water level outside the pipe member, H1 be the distance from the water bottom surface to the water level outside the pipe member, H2 be the distance from the water bottom surface to the grout material filled in the pipe member, x be the distance from the upper end surface of the grout material to the detection device, γw be the density of the water, γG be the density of the grout material, P0 be the hydrostatic pressure inside the pipe member, and P1 be the pressure obtained by the detection device during the grout material filling operation. x = (P1-P0) / (γG-γw) The position x of the upper end of the grout material filled in the pipe member is estimated in real time by calculating the position x of the upper end of the grout material filled in the pipe member. The grout filling management system according to claim 1.

3. A drainage device for draining water from inside the pipe member is provided, The pressure P1 P1 = H1 × γw + H2 × γG Fill the inside of the pipe member, the outer peripheral surface of the pipe member, and the gap between the bottom ground with grout material until When the drainage speed of drainage from the inside of the pipe member is v, vG = (γw / γG) × v Fill the grout material at a filling speed vG calculated by The pressure P2 of the grout material filled in the pipe member is P2 = H1 × γw + H2 × γG Drain the inside of the pipe member and add grout material until the The grout filling management system according to claim 1.

4. In addition to or instead of draining the inside of the pipe member and additionally filling the grout material until the pressure P2 of the grout material filled in the pipe member becomes P2 = H1 × γw + H2 × γG, Drain water of volume Vw calculated by Vw=π×(d / 2)^2×h from inside the pipe member. The grout filling management system according to claim 3.

5. A detection device for detecting the pressure of the grout material filled in the pipe member, The lower end of the tubular member or the lower end of the tremie tube is provided. The grout filling management system according to claim 1.

6. A detection device for detecting the pressure of the grout material filled in the pipe member, The pipe member is provided at a position that is 1 / 3 or less from the bottom of the insertion length of the pipe member into the bottom ground. The grout filling management system according to claim 1.

7. A grout 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 a lower end of the pipe member and the water bottom ground with grout material on an outer peripheral surface of the pipe member and the water bottom ground, the method comprising the steps of: Detecting a pressure of the grout material filled in the pipe member, a water surface position inside the pipe member, and a water surface position outside the pipe member, respectively; Let h be the difference between the water level inside the pipe member and the water level outside the pipe member, H1 be the distance from the water bottom surface to the water level outside the pipe member, H2 be the distance from the water bottom surface to a detection device that detects the pressure of the grout material filled in the pipe member, x be the distance from the upper end surface of the grout material to the detection device, γw be the density of the water, γG be the density of the grout material, P0 be the hydrostatic pressure inside the pipe member, and P1 be the pressure obtained by the detection device during the grout material filling operation. In the first step, x = (P1-P0) / (γG-γw) The position x of the upper end of the grout material filled in the pipe member is estimated in real time, In the second step, The pressure P1 of the grout material filled in the pipe member P1 = H1 × γw + H2 × γG Fill the inside of the pipe member, the outer peripheral surface of the pipe member, and the gap between the bottom ground with grout material until In the third step, When the drainage speed of drainage from the inside of the pipe member is v, vG = (γw / γG) × v Fill the grout material at a filling speed vG calculated by In the fourth step, The pressure P2 of the grout material filled in the pipe member is P2 = H1 × γw + H2 × γG and draining the inside of the pipe member and additionally filling the grout material therein until the grout material reaches the specified level.

8. In addition to or instead of draining water from the inside of the pipe member until the pressure P2 of the grout material filled in the pipe member becomes P2 = H1 x γw + H2 x γG, The water of volume Vw calculated by Vw = π × (d / 2)^2 × h is drained from the inside of the pipe member and additional grout material is filled. The grout filling management method according to claim 7.

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