Method for installing a tension member in an anchoring structure of an anchoring tube and construction device therefor

Abstract

The present application relates to a kind of anchoring cylinder anchoring structure tensile member installation method and the construction device used in geotechnical anchoring engineering field, the installation method first constructs hollow steel pipe as anchoring cylinder in rock-soil body, then constructs horizontal or oblique lateral steel pipe in rock-soil body between the body to be anchored and anchoring cylinder, after the intersection of lateral steel pipe and anchoring cylinder side wall, by heating or cooling in the front end of lateral steel pipe, the specific position of the intersection point of lateral steel pipe and anchoring cylinder side wall is determined by detecting the change of anchoring cylinder side wall temperature field, hole is opened on anchoring cylinder side wall, so that anchoring cylinder and lateral steel pipe are communicated, form tensile member installation hole, construction device includes rack (1), lateral steel pipe (2), lateral steel pipe clamp (3), plug-in power device (4), temperature change device (5) five parts, the method can accurately determine the intersection position in rock-soil, construction speed is fast, safety degree is high, quality is reliable, cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for installing a tension member of an anchoring structure with an anchoring cylinder and a construction device used in the method. BACKGROUND

[0002] Geotechnical anchoring engineering is an engineering that uses rock or soil to provide tensile bearing capacity. Commonly used geotechnical anchoring structures mainly include anchor cables (anchor rods), uplift piles, and anchoring plates. The anchor cables (anchor rods) and uplift piles mainly use the friction between the tensile member and the soil to provide tensile resistance, and the anchoring plate generally needs to be embedded in the rock-soil body and is suitable for backfill soil. The anchoring cylinder anchoring structure greatly improves the tensile bearing capacity of the anchoring structure, can be fully recycled and reused, reduces the cost of anchoring engineering, and eliminates the disadvantage of large underground space occupation range in geotechnical anchoring engineering. The anchoring cylinder anchoring structure uses a hollow tubular member constructed in the rock-soil body as an anchoring cylinder, uses the hollow part to provide an operation surface for connecting the anchoring cylinder, and uses the hollow tubular member to improve the tensile bearing capacity. The anchoring cylinder anchoring structure includes a anchored member, a tension member, an anchoring cylinder, a anchored member connection, and an anchoring cylinder connection. The anchoring cylinder is a hollow tubular member, which can be a steel pipe pile, a pipe jacking, a shaft, or a stable hole wall constructed in the rock-soil body. The anchoring cylinder connection is a member that firmly connects the tension member and the anchoring cylinder. After the anchoring cylinder connection is constructed, the hollow part of the anchoring cylinder can be filled with concrete or reinforced concrete to form an anchoring body. One end of the tension member is connected to the anchored member, and the other end is connected to the anchoring cylinder and bears the tension. The emergence of the anchoring cylinder technology is a landmark event in the field of geotechnical anchoring engineering, which changes the basic form of providing anchoring force in the field of geotechnical anchoring engineering, has a wide range of applications, and has outstanding engineering value. SUMMARY

[0003] The first object of the present application is to provide a method for installing a tension member of an anchoring structure with an anchoring cylinder, which can successfully complete the installation of the tension member of the anchoring structure with an anchoring cylinder, has high construction safety, low cost, and can be fully recycled and reused, and has significant environmental value and social benefits.

[0004] The method for installing a tension member of an anchoring structure with an anchoring cylinder includes the following steps:

[0005] a) Constructing a vertical large-diameter steel pipe in the soil as an anchoring cylinder and as a bearing capacity providing member of the anchoring structure with an anchoring cylinder;

[0006] b) In the soil between the anchored member and the anchoring cylinder constructed in step a), constructing a hollow lateral steel pipe obliquely or horizontally, so that the lateral steel pipe intersects with the anchoring cylinder in the soil, and when there is soil above the operation surface of the anchoring cylinder, the soil above the operation surface of the anchoring cylinder is removed in this step;

[0007] c) raising or lowering the temperature near the intersection point by using a temperature changing device placed in the lateral steel pipe to change the temperature field near the intersection point;

[0008] d) measuring the temperature of the side wall of the anchoring cylinder near the intersection point or observing the change of the side wall of the anchoring cylinder caused by the temperature change;

[0009] e) determining the specific position of the intersection point in step b) by determining the position of the highest temperature point or the lowest temperature point of the side wall of the anchoring cylinder;

[0010] f) cutting the side wall of the anchoring cylinder at the specific position of the intersection point determined in step e) so that the lateral steel pipe is in communication with the anchoring cylinder;

[0011] g) using the lateral steel pipe constructed in step f) to pass the anchor cable through the anchoring cylinder as a tension member or using the lateral steel pipe as a tension member to connect the two ends of the tension member with the anchoring cylinder and the anchored member respectively, and entering the anchoring structure use stage of the anchoring cylinder.

[0012] In the anchoring cylinder anchoring structure tension member installation method described above, in step g) described above, the anchor cable is placed in the lateral steel pipe as a tension member, and after the placement of the anchor cable is completed, the lateral steel pipe is pulled out, and after the use of the anchoring cylinder anchoring structure is completed, the connection between the anchored member and the tension member is released, the anchoring cylinder is pulled out of the rock-soil body together with the tension member, and is recycled and reused.

[0013] In the anchoring cylinder anchoring structure tension member installation method described above, in step f) described above, the soil outside the anchoring cylinder is dewatered.

[0014] The second object of the present application is to provide a tension member construction device for use in the anchoring cylinder anchoring structure tension member installation method, which can smoothly realize the installation and construction of the anchoring cylinder anchoring structure tension member, accurately determine the position of the intersection point of the lateral steel pipe and the anchoring cylinder, have a fast construction speed, reliable quality, and high safety.

[0015] The tension member construction device comprises a frame, a lateral steel pipe, a lateral steel pipe clamp, a plug-in power device, and a temperature changing device. The frame is a device for fixing the lateral steel pipe clamp and the plug-in power device, and is a device for providing the plug-in construction reaction force of the lateral steel pipe. The lateral steel pipe is a horizontally or obliquely placed steel pipe. The lateral steel pipe clamp is a device with the functions of fixing and releasing the lateral steel pipe. The plug-in power device is a device with the functions of inserting and pulling out the lateral steel pipe from the rock-soil body. One end of the plug-in power device is connected with the frame, and the other end is connected with the lateral steel pipe clamp. The temperature changing device is one or a combination of heating and cooling devices, and is placed in the lateral steel pipe.

[0016] In the tension member construction device described above, the lateral steel pipe is a steel pipe with a closed front end, and the temperature changing device is located at the front end of the lateral steel pipe.

[0017] In the tension member construction device described above, a bolt is provided at the front end of the frame.

[0018] In the tension member construction device described above, the plug-in power device is one of a jack and a vibrating hammer, or a combination of both.

[0019] In the tension member construction device described above, a water filter plate and a water suction pipe are provided at the front end of the lateral steel pipe. The water filter plate includes a water permeable membrane and a water repellent groove. The water permeable membrane is a porous membrane with the function of blocking soil particles and allowing water to pass through. The water repellent groove is a member with a groove. The water permeable membrane is wrapped around the periphery of the water repellent groove. One end of the water suction pipe is connected to the water filter plate, and the other end of the water suction pipe is connected to a water suction vacuum pump.

[0020] In the tension member construction device described above, a water storage pipe is provided outside the water suction pipe. The water storage pipe is a tubular member with a certain length buried in the rock-soil body. A booster pipe is installed inside the water storage pipe. The booster pipe is a hollow tubular member. The upper end of the booster pipe is in communication with the construction operation surface, and the lower end of the water suction pipe is lower than the lower end of the booster pipe.

[0021] The anchor tube anchoring structure tension member installation method and the construction device used thereby of the present application are suitable for various strata, can accurately determine the intersection position of the lateral steel pipe and the anchor tube in a non-destructive manner, have fast construction speed, low cost, and reliable quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 The anchor tube anchoring structure tension member construction device used for an embodiment of the present application is shown in the cross-sectional view.

[0023] Fig. 2 The lateral steel pipe structure with a water lowering function in the anchor tube anchoring structure tension member construction device used for an embodiment of the present application is shown in the cross-sectional view.

[0024] Fig. 3 The water filter plate cross-sectional structure used for an embodiment of the present application is shown in the cross-sectional view. DETAILED DESCRIPTION

[0025] As an embodiment of the present application, the anchor tube anchoring structure tension member installation method and the construction device used thereby of the present application will be described below in combination with Figs. 1-3 , the construction structure and working principle of the anchor tube anchoring structure tension member installation method and the construction device used thereby of the present application will be introduced. First, the anchor tube anchoring structure tension member installation method and the construction device used thereby of the present application will be described in combination with Figs. 1-3This paper introduces the structure and working principle of the construction device for the anchoring tube anchoring structure tension member of the present invention. The construction device for the tension member includes five parts: frame (1), lateral steel pipe (2), lateral steel pipe clamp (3), insertion and extraction power device (4), and temperature changing device (5). The frame (1) is a device for fixing the lateral steel pipe clamp (3) and the insertion and extraction power device (4) and providing the insertion and extraction reaction force of the lateral steel pipe (2). The lateral steel pipe (2) is a horizontal or inclined steel pipe. The lateral steel pipe clamp (3) is a device for fixing and releasing the lateral steel pipe (2). The insertion and extraction power device (4) is a device for inserting and pulling the lateral steel pipe (2) into the rock or soil. One end of the insertion and extraction power device (4) is connected to the frame (1), and the other end is connected to the lateral steel pipe clamp (3). The temperature changing device (5) is one or a combination of two heating or cooling devices and is placed inside the lateral steel pipe (2). In this embodiment, the construction device used for installing the tension member of the anchoring tube anchoring structure provides a through hole for the installation of the tension member of the anchoring tube through the construction of the lateral steel pipe (2). By using the temperature changing device (5) placed at the front end of the lateral steel pipe (2), the temperature field near the lateral steel pipe (2) is changed by raising or lowering the temperature. By measuring the temperature change of the side wall of the anchoring tube inside the anchoring tube, the intersection point of the lateral steel pipe (2) and the side wall of the anchoring tube in the soil can be accurately determined. This allows for the opening of a small area inside the anchoring tube, making the anchoring tube and the lateral steel pipe (2) connected, and providing a safe and stable construction hole for the installation of the tension member. In this embodiment, the lateral steel pipe (2) can be set as a steel pipe with a closed front end, and the temperature changing device (5) is placed at the front end of the lateral steel pipe (2) to improve the positioning accuracy of the intersection point of the lateral steel pipe (2) and the side wall of the anchoring tube. In this embodiment, a bolt connection (6) can be provided at the front end of the frame (1) to firmly connect the frame (1) to the anchored component, providing the construction reaction force for inserting and pulling the lateral steel pipe (2). In this embodiment, the insertion and pulling power device (4) can be a jack or a vibratory hammer and its combination. When the insertion and pulling power device (4) is a vibratory hammer, the frame (1) should be connected to the vibratory hammer, and the lateral steel pipe clamp (3) should be connected to the vibratory hammer. The lateral steel pipe clamp (3) can be set at the rear end of the lateral steel pipe (2). In this embodiment, a filter plate (7) and a pumping pipe (8) can be installed at the front end of the lateral steel pipe (2), such as Fig. 2As shown, the water filter plate (7) comprises a water permeable membrane (10) and a hydrophobic groove (11), the water permeable membrane (10) is a porous membrane with the function of blocking soil particles and water permeability, the hydrophobic groove (11) is a member with a groove, the water permeable membrane (10) is wrapped around the periphery of the hydrophobic groove (11), one end of the water pump pipe (8) is connected with the water filter plate (7), and the other end of the water pump pipe (8) is connected with the water pump. By setting up, the front end of the lateral steel pipe (2) can be locally dewatered by the vacuum pump, which is especially suitable for the case that the intersection point of the lateral steel pipe (2) and the side wall of the anchoring cylinder is located in the quicksand layer and is below the underground water level, and can avoid the quicksand or piping disaster caused by the opening of the side wall of the anchoring cylinder. In this embodiment, a water storage pipe (12) can be installed outside the water pump pipe (8), the water storage pipe (12) is a tubular member with a certain length buried in the rock-soil body, a booster pipe (13) is installed in the water storage pipe (12), the booster pipe (13) is a hollow tubular member, so that the front end of the water pump pipe (8) is lower than the front end of the booster pipe (13), the purpose of this is to adjust the speed of the gas input into the booster pipe (13) and the pumping speed, so that the front end of the water pump pipe (8) is always below the water surface, adjusting the gas pressure difference between the water outlet of the water pump pipe (8) and the water storage pipe (12) can make full use of atmospheric pressure and gravity, improve the pumping efficiency, and achieve the purpose of local dewatering.

[0026] The following parts of the embodiment are combined Fig. 1, introduce the specific implementation and steps of the installation method of the tension member of the anchoring cylinder anchoring structure. First, a vertical large-diameter steel pipe is constructed in the soil as an anchoring cylinder and a bearing capacity providing member of the anchoring cylinder anchoring structure. In this step, for relatively soft soil, the anchoring cylinder can be driven by vibration or static pressure, and for relatively hard soil or rock mass, a hole can be drilled first, and then the steel pipe is placed in the rock mass or soil, thereby completing the installation construction of the anchoring cylinder. After the first step is completed, the second step is entered. In this step, a hollow lateral steel pipe (2) is constructed obliquely or horizontally in the soil between the anchored member and the anchoring cylinder constructed in the first step, so that the lateral steel pipe (2) intersects with the anchoring cylinder in the soil. When there is soil above the construction operation surface in the anchoring cylinder, the soil above the construction operation surface of the anchoring cylinder is removed in this step, and the space in the anchoring cylinder is used to provide a subsequent construction operation surface. After the second step is completed, the third step is entered. In this step, the temperature near the intersection point is raised or lowered by using a temperature changing device (5) placed in the lateral steel pipe (2), and the temperature field near the intersection point is changed. In this step, the temperature changing device (5) can be a heater or a condenser, which can be powered through an electrically conductive wire (9) to achieve the purpose of heating or cooling. After the third step is completed, the fourth step is entered. The temperature of the side wall of the anchoring cylinder near the intersection point is measured in the anchoring cylinder or the change of the side wall of the anchoring cylinder caused by temperature change is observed. The change of the side wall of the anchoring cylinder caused by temperature change in this step refers to the change of the color and dryness of the side wall of the anchoring cylinder caused by the temperature changing device (5) before and after it is turned on, including but not limited to the side wall of the anchoring cylinder becoming dry, changing color, emitting hot air or icing, etc. After the fourth step is completed, the fifth step is entered. In this step, the specific position of the intersection point in the above step b) is determined by determining the position of the highest temperature point or the lowest temperature point of the side wall of the anchoring cylinder. When the lateral steel pipe (2) intersects with the side wall of the anchoring cylinder during the insertion into the soil during construction, the insertion resistance will increase significantly, but due to the existence of construction errors, it is difficult to accurately measure the intersection point position through the lateral steel pipe (2). When the lateral steel pipe (2) intersects with the side wall of the anchoring cylinder, the front end of the lateral steel pipe (2) is in contact with the side wall of the anchoring cylinder at the intersection point. Therefore, when the front end of the lateral steel pipe (2) is heated, the temperature of the side wall of the anchoring cylinder near the intersection point is the highest, and when the temperature of the front end of the lateral steel pipe (2) is lowered, the temperature of the side wall of the anchoring cylinder near the intersection point is the lowest, so the position of the intersection point of the lateral steel pipe (2) and the side wall of the anchoring cylinder can be determined. After the fifth step is completed, the sixth step is entered. In this step, the side wall of the anchoring cylinder is cut at the specific position of the intersection point determined in the fifth step, so that the lateral steel pipe (2) is in communication with the anchoring cylinder. In this step, after the side wall of the anchoring cylinder is cut, the lateral steel pipe (2) can be inserted into the anchoring cylinder, and the gap between the opening of the side wall of the anchoring cylinder and the outside of the lateral steel pipe (2) can be sealed with double-quick cement. By removing the sealing plate at the front end of the lateral steel pipe (2), the lateral steel pipe (2) is in communication with the anchoring cylinder.In this step, when the anchor cylinder side wall cutting hole is below the underground water level and in the quicksand stratum, the water can be precipitated in the soil outside the anchor cylinder to avoid quicksand or piping disasters caused by the anchor cylinder side wall opening. After the sixth step is completed, the seventh step is entered. In this step, the anchor cable is passed through the anchor cylinder as a tension member or the lateral steel pipe (2) is used as a tension member, and the two ends of the tension member are connected with the anchor cylinder and the anchored member respectively, and the anchor cylinder anchoring structure enters the use stage. In this step, the anchor cable can be placed in the lateral steel pipe (2) as a tension member, and after the anchor cable is placed, the lateral steel pipe (2) is pulled out. After the anchor cylinder anchoring structure use stage is completed, the connection between the anchored member and the tension member can be released, the anchor cylinder is pulled out of the soil together with the tension member, and is recycled and reused. Thus, the anchor cylinder anchoring structure tension member installation method of the present application is completed.

[0027] This patent includes but is not limited to other similar devices and methods that can be used by professionals in the field.

Claims

1. A method for installing a tension member in an anchorage structure comprising the following steps: a) constructing a vertical large-diameter steel pipe as an anchorage cylinder in the soil and providing a member for the bearing capacity of the anchorage cylinder anchorage structure; b) constructing a hollow lateral steel pipe (2) obliquely or horizontally in the soil between the anchored member and the anchorage cylinder constructed in step a), so that the lateral steel pipe (2) intersects the anchorage cylinder in the soil, and when there is soil above the construction operation surface in the anchorage cylinder, the soil above the construction operation surface of the anchorage cylinder is removed in this step; c) raising or lowering the temperature near the intersection point by using a temperature changing device (5) placed in the lateral steel pipe (2), and changing the temperature field near the intersection point; d) measuring the temperature of the anchorage cylinder side wall near the intersection point in the anchorage cylinder or observing the changes in the anchorage cylinder side wall caused by the temperature change; e) determining the specific position of the intersection point in the above step b) by determining the position of the highest temperature point or the lowest temperature point of the anchorage cylinder side wall; f) cutting the anchorage cylinder side wall at the specific position of the intersection point determined in step e), so that the lateral steel pipe (2) communicates with the anchorage cylinder; g) using the lateral steel pipe (2) constructed in step f) to pass the anchor cable through the anchorage cylinder as a tension member, or using the lateral steel pipe (2) as a tension member, connecting the two ends of the tension member to the anchorage cylinder and the anchored member respectively, and entering the anchorage cylinder anchorage structure into the use stage. In the above step f), the soil outside the anchorage cylinder is dewatered. The device comprises a rack (1), a lateral steel pipe (2), a lateral steel pipe clamp (3), a plug-in power device (4), and a temperature changing device (5). The rack (1) is a device for fixing the lateral steel pipe clamp (3) and the plug-in power device (4), and is a device for providing the plug-in construction counterforce of the lateral steel pipe (2). The lateral steel pipe (2) is a horizontally or obliquely placed steel pipe. The lateral steel pipe clamp (3) is a device with the functions of fixing and releasing the lateral steel pipe (2). The plug-in power device (4) is a device with the functions of inserting and pulling out the lateral steel pipe (2) from the rock-soil body. One end of the plug-in power device (4) is connected to the rack (1), and the other end is connected to the lateral steel pipe clamp (3). The temperature changing device (5) is one or a combination of heating and cooling devices, and is placed in the lateral steel pipe (2). The above-mentioned lateral steel pipe (2) is a steel pipe with a closed front end, and the temperature changing device (5) is located at the front end of the lateral steel pipe (2). The above-mentioned rack (1) is provided with a bolt connection (6) at the front end. The above-mentioned plug-in power device (4) is one or a combination of a jack and a vibrating hammer. The above-mentioned lateral steel pipe (2) is provided with a water filter plate (7) and a water suction pipe (8) at the front end. The water filter plate (7) comprises a water permeable membrane (10) and a water repellent groove (11). The water permeable membrane (10) is a porous membrane with the functions of blocking soil particles and allowing water to pass through. The water repellent groove (11) is a component with grooves. The water permeable membrane (10) is wrapped around the periphery of the water repellent groove (11). One end of the water suction pipe (8) is connected to the water filter plate (7), and the other end of the water suction pipe (8) is connected to a water suction vacuum pump. ​ 2. The method of claim 1, wherein the step of installing the tension member comprises the step of: The above-described steps g ) In the side steel pipe (2), the anchor cable is placed as the tension member, after the anchor cable is placed, the side steel pipe (2) is pulled out, after the anchoring cylinder anchoring structure is used, the connection between the anchoring member and the tension member is released, the anchoring cylinder is pulled out from the rock-soil body together with the tension member, and is recycled and reused. ​ 3. The method of claim 1, wherein the method further comprises ​ 4. A tension member construction device for use in the method of claim 1, wherein ​ 5. The tension member construction apparatus of claim 4, wherein ​ 6. The tension member construction apparatus of claim 4, wherein ​ 7. The tension member construction apparatus of claim 4, wherein ​ 8. The tension member construction apparatus of claim 4, wherein ​ 9. The tension member construction apparatus of claim 8, wherein The outer side of the water pumping pipe (8) is provided with a water storage pipe (12), which is a tubular member with a certain length buried in the rock-soil body. A booster pipe (13) is installed in the water storage pipe (12), which is a hollow tubular member. The upper end of the booster pipe (13) is in communication with the construction operation surface, and the lower end of the water pumping pipe (8) is lower than the lower end of the booster pipe (13).

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