Construction method and construction structure of steel cage steel string stress gauge

Abstract

The present invention discloses a construction method and construction structure of a steel cage steel string stress gauge, the construction method comprising: making side lap steel bars and connecting rods, wherein the side lap steel bars and the connecting rods are both ribbed steel bars of the same grade as the main reinforcement building materials; determining the connection method of the side lap steel bars with the main reinforcement and the connecting rods in combination with the actual site; determining the welding position and length; determining the position and length of the side lap welding and the position and length of the butt welding of the main reinforcement and the connecting rod; installing the steel string stress gauge; welding, butt welding the main reinforcement and the connecting rod, and then overlapping the side lap steel bars on both sides of the main reinforcement and the connecting rod. The present invention avoids changes in the stress transmission effect caused by the different materials on both sides of the welding to the greatest extent through the design of the construction structure, and transmits the stress of the main reinforcement on both sides to the steel string stress gauge sensor without eccentricity, thereby ensuring the reliability of the monitoring data.

Description

Technical Field

[0001] The present invention relates to the technical field of stress gauge installation, and in particular to a construction method and a construction structure of a steel cage steel string type stress gauge. Background Art

[0002] With the advancement of science and technology, steel chord strain gauges need to be installed on the cage to accurately monitor the stress on the steel bars. However, research on strain gauge installation methods is currently insufficient. The traditional installation method, which connects the steel chord strain gauges to the main bars through mechanical connections, is inefficient. In addition, because the fabrication of cylindrical pile foundation steel cages requires the use of equipment such as cage rollers to install the stirrups, installing the steel chord strain gauges before installing the stirrups can easily damage the strain gauge sensor and shielded cable.

[0003] Currently, the installation of steel cage steel string stress gauges usually involves cutting the main bars of the cage and then directly lap welding them in situ. This method will cause the main axis of the strain gauge to not coincide with the main axis of the main bar, resulting in inaccurate monitoring results. On the other hand, the in-situ butt welding method is not suitable for steel bars with larger main bar diameters. Summary of the Invention

[0004] The purpose of the present invention is to overcome the technical problems of low efficiency, inaccurate monitoring data and unstable installation of traditional steel string stress gauges in the background technology, thereby providing a construction method and construction structure of a steel cage steel string stress gauge.

[0005] To solve the above problems, the first object of the present invention is to provide a construction method for a steel cage steel string stress gauge, the construction method comprising:

[0006] S 100 : Make side lap reinforcement and connecting rods;

[0007] Wherein, the side lap steel bars and the connecting rods are ribbed steel bars of the same grade as the main reinforcement building materials;

[0008] S 200 : Determine the connection method of the side lap reinforcement, the main reinforcement and the connecting rod based on the actual situation on site;

[0009] S 300 : Determine welding position and length;

[0010] Determine the position and length of the side lap weld and the position and length of the butt weld between the main reinforcement and the connecting rod;

[0011] S 400 : Install steel string strain gauge;

[0012] S 500 :welding;

[0013] The main reinforcement and the connecting rod are butt-welded, and then the side lap steel bars are overlapped on both sides of the main reinforcement and the connecting rod.

[0014] Optionally, in step S 100 The connecting rod is made of steel bars processed and threaded.

[0015] Optionally, in step S 200 Among them, the connection method of determining the side lap steel bars, the main bars and the connecting rods includes single-sided lap welding or double-sided lap welding.

[0016] Optionally, in step S 300 Among them, after determining the welding position and length, the method further includes the step of threading the connection between the connecting rod and the steel string stress gauge.

[0017] Optionally, in step S 400 During the entire welding process, the temperature of the steel string strain gauge is controlled below +60℃.

[0018] Optionally, in step S 400 The installation of the steel string strain gauge specifically includes:

[0019] S 410 : Calculate the required length of the connecting rod according to the length of the steel sleeve of the steel string strain gauge and the total length required for the lap welding of the steel bars on both sides;

[0020] S 420 : According to the total length of the main reinforcement and the connecting rod after butt welding, the main reinforcement is cut at the position to be monitored.

[0021] Optionally, the threading process includes: determining the threading length based on the length of the thread teeth in the steel sleeve and the "Technical Regulations for Mechanical Connection of Rebars".

[0022] Optionally, the method of controlling the body temperature of the steel string strain gauge to be below +60° C. is to use a wet towel or sprinkle water to cool it down.

[0023] Optionally, the ribbed steel bar has a Rockwell hardness of 400 and a nominal diameter of 32 mm.

[0024] A second object of the present invention is to provide an installation structure for a steel cage steel string type stress gauge, which adopts the construction method of the steel cage steel string type stress gauge as described above.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Through the construction method of the steel cage steel string stress gauge, the connecting parts of the steel string stress gauge (connecting rods and main bars), the overlapping steel bars on both sides all use steel bars of the same grade as the stress gauge connecting rods and the overlapping welded steel bars on both sides, which avoids to the greatest extent the changes in the stress transmission effect of the steel string stress gauge caused by the different materials on both sides of the welding, and guarantees the reliability of the monitoring data to the greatest extent; the steel string stress gauge is symmetrically overlapped and welded on both sides of the steel string stress gauge and connected at the connecting rod and the main bars, so that the stress of the main bars on both sides is transmitted to the steel string stress gauge sensor without eccentricity to the greatest extent, thereby obtaining more effective monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the process of the construction method of the steel cage steel string stress gauge in an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the construction structure of the steel cage steel string stress gauge in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1-main reinforcement; 2-side lap welding point; 3-butt welding point; 4-side lap reinforcement; 5-connecting rod; 6-steel string stress gauge; 7-connecting rod thread. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] See also Figure 1 As shown, an embodiment of the present invention provides a construction method for a steel cage steel string stress gauge, the construction method comprising:

[0035] S 100 : Make side lap reinforcement 4 and connecting rod 5;

[0036] Among them, the side lap steel bars 4 and the connecting rods 5 are ribbed steel bars of the same grade of building materials as the main bars 1;

[0037] S 200 : Based on the actual situation on site, determine the connection method between the side lap reinforcement 4, the main reinforcement 1 and the connecting rod 5;

[0038] S 300 : Determine welding position and length;

[0039] Determine the position and length of the side lap weld and the position and length of the butt weld between the main reinforcement 1 and the connecting rod 5;

[0040] In this step, the length of the connecting rod 5 and the length of the side lap steel bars 4 on both sides are determined based on the length of the side lap welding points 2 on both sides and the length of the closest point between the side lap welding points 2 and the steel string stress gauge 6 on both sides (the minimum spacing is based on the length recommended by the instrument manufacturer's test. In this example, all steel bars are ribbed steel bars with a Rockwell hardness HRB of 400 and a nominal diameter of 32 mm. The minimum spacing length designed in this example is ≥150 mm).

[0041] S 400 : Install steel string strain gauge 6;

[0042] S 500 :welding;

[0043] The main reinforcement 1 and the connecting rod 5 are butt-welded, and then the steel bars 4 are overlapped on both sides of the main reinforcement 1 and the connecting rod 5.

[0044] Specifically in the embodiment of the present invention, the installation method of the steel string stress gauge 6 consists of a main reinforcement 1, a side lap welding point 2, a butt welding point 3, a side lap steel bar 4, a connecting rod 5, a steel string stress gauge 6 and a connecting rod thread 7, wherein the side lap steel bar 4 and the connecting rod 5 are ribbed steel bars of the same grade as the main reinforcement 1.

[0045] Specifically, in the embodiment of the present invention, in step S 100 The connecting rod 5 is made of steel bars processed and threaded.

[0046] After confirming the length, the connection between the connecting rod 5 and the steel string stress gauge 6 is threaded. The specific threading length is determined based on the length of the thread teeth in the steel sleeve and the "Technical Code for Mechanical Connection of Steel Bars" (JGJ107-2021).

[0047] Specifically, in the embodiment of the present invention, in step S 200The connection method of the side lap reinforcement 4 to the main reinforcement 1 and the connecting rod 5 includes single-sided lap welding or double-sided lap welding.

[0048] According to the requirements of the specification and the actual situation on site, the connection method of the side lap steel bars 4 on both sides with the main bars 1 and the connecting rods 5 is selected. In this embodiment, single-sided lap welding or double-sided lap welding can be selected according to the specific actual situation.

[0049] Specifically, in the embodiment of the present invention, in step S 300 Among them, after determining the welding position and length, the step of threading the connection between the connecting rod 5 and the steel string stress gauge 6 is also included.

[0050] Specifically, in the embodiment of the present invention, in step S 400 During the entire welding process, the body temperature of the steel string strain gauge 6 is controlled to be below +60°C.

[0051] Specifically, in the embodiment of the present invention, in step S 400 The installation of the steel string strain gauge 6 specifically includes:

[0052] S 410 : Calculate the required length of the connecting rod 5 based on the length of the steel sleeve of the steel string strain gauge 6 and the total length required for the lap welding of the steel bars on both sides;

[0053] S 420 : According to the total length of the main reinforcement 1 and the connecting rod 5 after butt welding, the main reinforcement 1 is cut at the position to be monitored.

[0054] The specific implementation steps for installing the steel string strain gauge 6 in the embodiment of the present invention are as follows:

[0055] After the threading is completed and connected to the steel string type strain gauge 6, first cut the appropriate length at the appropriate position of the main reinforcement 1 according to the total length of the steel string type strain gauge 6;

[0056] Then, butt weld the steel string strain gauge 6 to the main reinforcement 1. After the weld has cooled, weld the overlapped joints on both sides. During the welding process, use a wet towel or sprinkle water to keep the temperature of the steel string strain gauge 6 below +60°C.

[0057] After the welding is completed and the body is cooled, the debris at the construction location of the steel string stress gauge 6 is cleaned.

[0058] Specifically, in an embodiment of the present invention, the threading process includes: determining the threading length based on the length of the thread teeth in the steel sleeve and the "Technical Specifications for Mechanical Connection of Rebars".

[0059] Specifically, in the embodiment of the present invention, the method of controlling the body temperature of the steel string strain gauge 6 to be below +60° C. is to use a wet towel or sprinkle water to cool it down.

[0060] Specifically, in the embodiment of the present invention, the ribbed steel bar has a Rockwell hardness HRB of 400 and a nominal diameter of 32 mm.

[0061] Yet another embodiment of the present invention provides an installation structure for a steel cage steel string type stress gauge, which adopts the construction method of the steel cage steel string type stress gauge as described above.

[0062] The effect of the installation structure of the steel cage steel string type stress gauge is the same as the effect of the construction method of the steel cage steel string type stress gauge mentioned above, and will not be described in detail here.

[0063] Although the present invention is disclosed as above, the scope of protection disclosed by the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A construction method for a steel cage steel string stress gauge, characterized in that: The construction method comprises: S 100 : Making side lap reinforcement (4) and connecting rod (5); Wherein, the side lap steel bars (4) and the connecting rods (5) are both ribbed steel bars of the same grade as the main reinforcement (1); S 200 : Based on the actual situation on site, determine the connection method of the side lap steel bar (4) with the main bar (1) and the connecting rod (5); S 300 : Determine welding position and length; Determine the position and length of the side lap welding and the position and length of the butt welding between the main reinforcement (1) and the connecting rod (5); S 400 : Install the steel string strain gauge (6); After determining the welding position and length, the method further includes the steps of: threading the connection between the connecting rod (5) and the steel string stress gauge (6); The installation of the steel string type stress gauge (6) specifically includes: S 410 : Calculate the required length of the connecting rod (5) based on the length of the steel sleeve of the steel string stress gauge (6) and the total length required for the lap welding of the steel bars on both sides; S 420 : According to the total length of the main reinforcement (1) and the connecting rod (5) after butt welding, the main reinforcement (1) is cut at the position to be monitored; S 500 :welding; The main reinforcement (1) and the connecting rod (5) are butt-welded, and then the side lap steel bars (4) are lapped on both sides of the main reinforcement (1) and the connecting rod (5).

2. The construction method of the steel cage steel string stress gauge according to claim 1, characterized in that: In step S 100 The connecting rod (5) is made of steel bars processed and threaded.

3. The construction method of the steel cage steel string stress gauge according to claim 1, characterized in that: In step S 200 The method for connecting the side lap steel bars (4) to the main bars (1) and the connecting rods (5) includes single-sided lap welding or double-sided lap welding.

4. The construction method of the steel cage steel string stress gauge according to claim 2, characterized in that: In step S 400 During the entire welding process, the body temperature of the steel string stress gauge (6) is controlled to be below +60°C.

5. The construction method of the steel cage steel string stress gauge according to claim 1, characterized in that: The threading process includes: determining the threading length according to the length of the thread teeth in the steel sleeve and the "Technical Regulations for Mechanical Connection of Rebars".

6. The construction method of the steel cage steel string stress gauge according to claim 4, characterized in that: The method of controlling the body temperature of the steel string type strain gauge (6) to be below +60°C is to use a wet towel or sprinkle water to cool it down.

7. The construction method of the steel cage steel string stress gauge according to any one of claims 1 to 6, characterized in that: The ribbed steel bar has a Rockwell hardness of 400 and a nominal diameter of 32 mm.

8. A mounting structure for a steel cage steel string stress gauge, characterized in that: A construction method for a steel cage steel string stress gauge according to any one of claims 1 to 7 is adopted.

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