Vertical shaft slip form concrete strength detection device and method

Abstract

The invention discloses a vertical shaft slip form concrete strength detection device and method, a slip form steel template is paved outside vertical shaft wall concrete, a detection device fixing support is installed outside the slip form steel template, the detection device fixing support is provided with a slide block guide rail assembly, and a miniature hydraulic oil cylinder fixing part is slidably connected with the slide block guide rail assembly. The concrete strength detection unit is installed on the miniature hydraulic oil cylinder fixing piece, the hydraulic oil pump is communicated with the concrete strength detection unit through the hydraulic electromagnetic valve, and the electric control system is electrically connected with the hydraulic electromagnetic valve and the hydraulic oil pump. The method has the advantages that the vertical shaft wall concrete strength is directly detected, the problems that a conventional slip-form demolding strength judgment method is large in error, cannot achieve on-site real-time monitoring and the like are solved, the vertical shaft slip-form demolding concrete strength accuracy is improved, the vertical shaft wall concrete construction quality is guaranteed, and the construction period is shortened. And the quality and safety risks caused by low and over-high demoulding strength of the slip form concrete are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shaft construction equipment, in particular to a shaft slipform concrete strength detection device and method. Background Art

[0002] According to the relevant provisions of the sliding formwork engineering technical standard "GB / T 50113-2019": The demoulding strength of the slipform concrete should be controlled at 0.2Mpa~0.4Mpa. At present, the judgment of the demoulding strength of the slipform concrete relies on the penetration resistance method to judge the concrete strength. The penetration resistance value is measured by screening the mortar indoors, and the penetration resistance-time curve is drawn. It is roughly judged that the time required for the concrete strength to reach 0.2Mpa~0.4Mpa is the demoulding time of the slipform concrete. However, the vertical shaft construction environment is complex, and the temperature and humidity are inconsistent with the laboratory environment. The laboratory test data has defects such as low accuracy and poor timeliness, which can easily cause quality and safety accidents at the construction site. Therefore, there is an urgent need for a device or method to solve the problem that the strength of the slipform concrete cannot be detected in real time on the spot. The shaft slipform concrete strength detection device and method provided by the present invention can solve the current problems of difficult detection and judgment of shaft slipform concrete, and has the following main benefits:

[0003] (1) Construction safety: High-precision sensor field testing replaces laboratory measurement to ensure the accuracy and reliability of shaft wall concrete strength testing, provide real feedback on the impact of the construction site environment on concrete strength, and provide a real and reliable basis for the jacking of the shaft slipform platform;

[0004] (2) Construction quality: Ensure that the demoulding strength of the slipform concrete is within a reasonable range, avoid premature demoulding that may cause the concrete to collapse or bulge, and prevent late demoulding that may cause the well wall concrete to be cracked or the formwork to be deformed.

[0005] Therefore, in order to solve the above technical problems, it is necessary to propose a device and method for detecting the strength of shaft slipform concrete. Summary of the Invention

[0006] The purpose of the present invention is to provide a shaft slipform concrete strength detection device and method. In order to solve the problem of lack of reliable concrete demoulding strength basis in the traditional shaft slipform lifting process, comprehensive consideration is given to various factors such as on-site implementation feasibility and installation convenience to ensure that the new shaft slipform concrete detection device and system have simple structure, reliable performance and efficient use.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A shaft slipform concrete strength detection device, comprising a concrete strength detection unit, a micro hydraulic cylinder fixing part, a slider guide assembly, a detection device fixing bracket, a slipform steel template, an electrical control system, a hydraulic solenoid valve, a hydraulic oil pump and a slipform platform;

[0009] The slipform steel formwork is paved outside the concrete of the shaft wall, the detection device fixing bracket is installed outside the slipform steel formwork, the detection device fixing bracket is provided with a slider guide rail assembly, the micro hydraulic cylinder fixing part is slidingly connected to the slider guide rail assembly, the concrete strength detection unit is installed on the micro hydraulic cylinder fixing part, the hydraulic oil pump is connected to the concrete strength detection unit through a hydraulic solenoid valve, and the electrical control system is electrically connected to the hydraulic solenoid valve and the hydraulic oil pump respectively.

[0010] Preferably, the concrete strength detection unit includes a micro hydraulic cylinder, a pull-rod displacement sensor and a probe, the pull-rod displacement sensor is connected to the side of the micro hydraulic cylinder, and the output end of the micro hydraulic cylinder is connected to the probe.

[0011] Preferably, the end of the micro hydraulic cylinder is connected to a first fixing plate, the middle side of the micro hydraulic cylinder is provided with a second fixing plate, and the pull rod displacement sensor is fixed to the first fixing plate and the fixing plate by bolts.

[0012] Preferably, the piston rod of the micro hydraulic cylinder is connected to a first threaded rod, the first threaded rod is threadedly connected to a probe, the output end of the pull rod type displacement sensor is provided with a pull rod, the pull rod is connected to a second screw rod, and a connecting plate is connected between the piston rod and the second threaded rod.

[0013] Preferably, a pressure sensor is integrated inside the micro hydraulic cylinder, which can output the pressure value borne by the end of the piston rod in the form of an electrical signal.

[0014] Preferably, the micro hydraulic cylinder fixing piece is L-shaped, and four fixing holes are reserved on the vertical plate at the end of the micro hydraulic cylinder fixing piece. The micro hydraulic cylinder is connected and fixed to the fixing piece through the fixing holes, bolts and nuts.

[0015] Preferably, the slider guide rail assembly is provided with multiple groups, preferably two groups, and the slider guide rail assembly includes a slider and a guide rail. The guide rail is fixed to the fixed bracket of the detection device by bolts. The slider is connected to the micro-cylinder fixing part. The guide rail shape is engaged with the slider slot, and the slider is provided with a steel ball inside, so that the slider and the guide rail are fixed and slided, meeting the requirement that the concrete strength detection device can switch to different detection points.

[0016] Preferably, the length of the guide rail is consistent with the length of the concrete strength detection section. There are 8 concrete strength detection sections in total, which are evenly distributed around the slipform. The length of each concrete strength detection section must ensure detection and measurement at no less than 3 monitoring points.

[0017] Preferably, the electrical control system controls the hydraulic solenoid valve to realize the oil inflow and outflow of the micro hydraulic cylinder, thereby controlling the extension and retraction of the probe of the strength monitoring unit.

[0018] A testing method for a shaft slipform concrete strength testing device, the method steps are as follows:

[0019] Manually open the oblong detection hole of the sliding steel template; input the penetration depth L0 of the probe on the electrical control cabinet;

[0020] One-button start of concrete strength testing, the electrical control system controls the hydraulic solenoid valve to open and the hydraulic oil circuit to supply oil;

[0021] Oil enters the micro hydraulic cylinder, the piston rod pushes out, driving the displacement sensor pull rod to pull out, and at the same time the probe at the end of the piston rod penetrates the concrete of the shaft wall;

[0022] During the ejection process of the micro hydraulic cylinder piston rod, the displacement sensor monitors and feeds back the piston rod displacement L1 in real time and transmits it to the electrical control system to determine whether to continue oiling. When L1=L0, the electrical control system controls the hydraulic solenoid valve to close and stop oiling.

[0023] The probe penetrates to a depth of L0 and remains there for about 5 seconds to collect information on the concrete penetration resistance. After 5 seconds, the electrical control system controls the solenoid valve and oil pump to return oil, the piston rod retracts, and the probe exits the concrete.

[0024] According to the conversion relationship obtained from the laboratory calibration test, the collected concrete penetration resistance value is converted into the concrete strength value;

[0025] There are 3 detection points in one detection section, and 8 monitoring sections in one sliding platform, for a total of 24 detection points.

[0026] After completing the inspection of one point in a section, manually push the strength inspection unit to the second inspection point, and so on;

[0027] 24 test values ​​are obtained, 2 maximum values ​​and 2 minimum values ​​are deleted, and 20 values ​​are retained. The average value of the 20 test values ​​is calculated. The electrical control system determines whether the test average value is within the range of [0.2Mpa, 0.4Mpa]. If the test average value is within this range, the on-site management personnel are prompted to carry out the slipform jacking process. Otherwise, the concrete strength is tested every 1 hour until the jacking is completed.

[0028] After completing the slipform jacking process, the probe at the end of the piston rod is manually removed and the residual mortar on the probe surface is cleaned to avoid affecting the accuracy of the next concrete strength test.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention directly detects the strength of the shaft wall concrete, avoiding the problems of large errors and inability to conduct on-site real-time monitoring in conventional methods for judging the strength of slipform demoulding, thereby improving the accuracy of the strength of the shaft slipform demoulding concrete, ensuring the construction quality of the shaft wall concrete, and effectively reducing the quality and safety risks caused by low or excessive slipform concrete demoulding strength.

[0031] 2. The present invention solves the problem that the concrete demoulding strength in the current shaft slipform lifting process depends on laboratory test data and can only be vaguely judged. It uses high-precision sensors to measure the concrete strength in real time, and truly feedback the impact of the construction site environment on the strength of the slipform concrete, providing an accurate basis for slipform concrete demoulding, improving the automation and informatization level of the shaft slipform construction process, and ensuring the construction quality of the shaft wall concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 and Figure 2 It is a structural schematic diagram of the present invention;

[0033] Figure 3 It is a top view of the structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the concrete strength detection section of the present invention;

[0035] Figure 5 This is a structural diagram of a concrete strength detection unit according to the present invention;

[0036] Figures 6 and 7 This is a structural diagram of the micro hydraulic cylinder of the present invention;

[0037] Figure 8 This is a structural diagram of the pull-rod displacement sensor of the present invention;

[0038] Figure 9 This is a structural diagram of the connecting plate of the present invention;

[0039] Figure 10 and Figure 11 This is a structural diagram of the micro hydraulic cylinder fixing part of the present invention;

[0040] Figure 12 This is a structural diagram of the slider guide rail assembly of the present invention;

[0041] Figure 13 This is a structural diagram of the sliding platform of the present invention;

[0042] Figure 14 Flow chart of the detection method of the present invention.

[0043] The accompanying drawings are as follows: 1. Concrete strength detection unit; 2. Micro hydraulic cylinder fixing part; 3. Slider guide rail assembly; 4. Detection device fixing bracket; 5. Sliding steel formwork; 6. Electrical control system; 7. Hydraulic solenoid valve; 8. Hydraulic oil pump; 9. Sliding platform; 10. Well wall concrete; 101. Micro hydraulic cylinder; 102. Pull rod displacement sensor; 103. Probe; 104. First fixed plate; 105. Second fixed plate; 106. Piston rod; 107. First threaded rod; 108. Pull rod; 109. Second threaded rod; 110. Connecting plate; 301. Slider; 302. Guide rail; 11. Concrete strength detection section. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0048] like Figure 1 Combined with Figures 2 to 14 As shown, a shaft slipform concrete strength detection device includes a concrete strength detection unit 1, a micro hydraulic cylinder fixing part 2, a slider guide assembly 3, a detection device fixing bracket 4, a slipform steel template 5, an electrical control system 6, a hydraulic solenoid valve 7, a hydraulic oil pump 8 and a slipform platform 9;

[0049] The slipform steel formwork 5 is paved outside the shaft wall concrete 10 of the slipform platform 9, the detection device fixing bracket 4 is installed outside the slipform steel formwork 5, the detection device fixing bracket 4 is provided with a slider guide rail assembly 3, the micro hydraulic cylinder fixing part 2 is slidingly connected to the slider guide rail assembly 3, the concrete strength detection unit 1 is installed on the micro hydraulic cylinder fixing part 2, the hydraulic oil pump 8 is connected to the concrete strength detection unit 1 through the hydraulic solenoid valve 7, and the electrical control system 6 is electrically connected to the hydraulic solenoid valve 7 and the hydraulic oil pump 8 respectively.

[0050] Furthermore, the concrete strength detection unit 1 includes a micro hydraulic cylinder 101 , a pull rod displacement sensor 102 and a probe 103 . The pull rod displacement sensor 102 is connected to the side of the micro hydraulic cylinder 101 , and the output end of the micro hydraulic cylinder 101 is connected to the probe 103 .

[0051] Furthermore, the end of the micro hydraulic cylinder 101 is connected to a first fixing plate 104, the middle side of the micro hydraulic cylinder 101 is provided with a second fixing plate 105, and the pull rod displacement sensor 102 is fixed to the first fixing plate 104 and the second fixing plate 105 by bolts.

[0052] Furthermore, the piston rod 106 of the micro hydraulic cylinder 101 is connected to a first threaded rod 107, which is threadedly connected to the probe 103. The output end of the pull rod type displacement sensor 102 is provided with a pull rod 108, which is connected to a second screw rod 109. A connecting plate 110 is connected between the piston rod 106 and the second threaded rod 109.

[0053] Furthermore, a pressure sensor is integrated inside the micro hydraulic cylinder 101, which can output the pressure value borne by the end of the piston rod 106 in the form of an electrical signal.

[0054] Furthermore, the micro hydraulic cylinder fixing part 2 is L-shaped, and four fixing holes 201 are reserved on the vertical plate at the end of the micro hydraulic cylinder fixing part 2. The micro hydraulic cylinder 101 is connected and fixed to the micro hydraulic cylinder fixing part 2 through the fixing holes 201, bolts, and nuts.

[0055] Furthermore, the slider guide rail assembly 3 is provided with multiple groups, preferably two groups, and the slider guide rail assembly 3 includes a slider 301 and a guide rail 302. The guide rail 302 is fixed to the detection device fixing bracket 4 by bolts. The slider 301 is connected to the micro-cylinder fixing part 2. The shape of the guide rail 302 is engaged with the slider 301 slot, and the slider 301 has a steel ball inside, so that the slider 301 and the guide rail 302 are fixed and slided, meeting the requirement that the concrete strength detection device can switch to different detection points.

[0056] Furthermore, the length of the guide rail 302 is consistent with the length of the concrete strength detection section 11. There are 8 concrete strength detection sections 11 in total, which are evenly distributed around the slipform. The length of each concrete strength detection section 11 must ensure detection and measurement at no less than 3 monitoring points.

[0057] The electrical control system 6 controls the hydraulic solenoid valve 7 to realize the oil inflow and outflow of the micro hydraulic cylinder 101, thereby controlling the extension and retraction of the probe 103 of the strength monitoring unit.

[0058] The detection device fixing bracket 4 is a customized steel bracket, and a steel bracket is arranged at both ends and the middle of the concrete strength detection section 11. The guide rail 302 in the sliding guide rail assembly 3 is fixed on the steel bracket.

[0059] The detection device fixing bracket 4 is connected to the slip form steel template 5, and the shaft concrete strength detection device composed of the concrete strength detection unit 1, the slider guide assembly 3, and the detection device fixing bracket 4 is installed on the top of the slip form steel template 6.

[0060] The slipform steel formwork 6 is provided with an openable formwork hole directly in front of the probe 103. During the pouring, vibration and curing stages of the well wall concrete 10, the openable formwork hole is closed. When the concrete strength is tested, the openable formwork hole is opened to allow the probe 103 at the end of the concrete strength testing unit 1 to penetrate into the well wall concrete 10 to detect the pressure value.

[0061] The electrical control system 6 is a custom-developed system. In addition to satisfying the automation control function of controlling the sliding platform 9 to improve synchronization, it also controls the concrete strength detection device to achieve one-button detection and data acquisition-processing-display functions.

[0062] A testing method for a shaft slipform concrete strength testing device, the method steps are as follows:

[0063] Manually open the oblong detection hole of the sliding steel template; input the penetration depth L0 of the probe on the electrical control cabinet;

[0064] One-button start of concrete strength testing, the electrical control system controls the hydraulic solenoid valve to open and the hydraulic oil circuit to supply oil;

[0065] Oil enters the micro hydraulic cylinder, the piston rod pushes out, driving the displacement sensor pull rod to pull out, and at the same time the probe at the end of the piston rod penetrates the concrete of the shaft wall;

[0066] During the ejection process of the micro hydraulic cylinder piston rod, the displacement sensor monitors and feeds back the piston rod displacement L1 in real time and transmits it to the electrical control system to determine whether to continue oiling. When L1=L0, the electrical control system controls the hydraulic solenoid valve to close and stop oiling.

[0067] The probe penetrates to a depth of L0 and remains there for about 5 seconds to collect information on the concrete penetration resistance. After 5 seconds, the electrical control system controls the solenoid valve and oil pump to return oil, the piston rod retracts, and the probe exits the concrete.

[0068] According to the conversion relationship obtained from the laboratory calibration test, the collected concrete penetration resistance value is converted into the concrete strength value;

[0069] There are 3 detection points in one detection section, and 8 monitoring sections in one sliding platform, for a total of 24 detection points.

[0070] After completing the inspection of one point in a section, manually push the strength inspection unit to the second inspection point, and so on;

[0071] 24 test values ​​are obtained, 2 maximum values ​​and 2 minimum values ​​are deleted, and 20 values ​​are retained. The average value of the 20 test values ​​is calculated. The electrical control system determines whether the test average value is within the range of [0.2Mpa, 0.4Mpa]. If the test average value is within this range, the on-site management personnel are prompted to carry out the slipform jacking process. Otherwise, the concrete strength is tested every 1 hour until the jacking is completed.

[0072] After completing the slipform jacking process, the probe at the end of the piston rod is manually removed and the residual mortar on the probe surface is cleaned to avoid affecting the accuracy of the next concrete strength test.

[0073] Compared with the prior art, the present invention has the following beneficial effects:

[0074] The present invention directly detects the strength of the concrete of the shaft wall, avoiding the problems of large errors and inability to conduct real-time monitoring on site in conventional methods for judging the strength of the slipform demoulding, improving the accuracy of the strength of the slipform demoulding concrete of the shaft, ensuring the construction quality of the concrete of the shaft wall, and effectively reducing the quality and safety risks caused by low or excessively high slipform concrete demoulding strength.

[0075] The present invention solves the problem that the concrete demoulding strength in the current shaft slipform lifting process depends on laboratory test data and can only be vaguely judged. It uses high-precision sensors to measure the concrete strength in real time, and truly feedback the impact of the construction site environment on the strength of the slipform concrete, providing an accurate basis for slipform concrete demoulding, improving the automation and informatization level of the shaft slipform construction process, and ensuring the construction quality of the shaft wall concrete.

[0076] Step 1: The basic concrete strength detection unit 1 is composed of the micro hydraulic cylinder 101, the pull rod displacement sensor 102, the probe 103 and other accessories.

[0077] Step 2: The concrete strength detection device is composed of a concrete strength detection unit 1, a micro hydraulic cylinder fixing part 2, a guide rail slider assembly 3, and a detection device fixing bracket 4.

[0078] Step three: a concrete strength detection device is installed on the uppermost portion of the slipform steel template 5 of the shaft slipform platform 9 to detect the strength value of the latest concrete entering the mold.

[0079] Step 4: The micro hydraulic cylinder 102 and its ends are each provided with connection holes, wherein the reserved connection holes of the cylinder body are used for connecting and fixing the pull rod displacement sensor, and the connection holes at the ends are used for connecting and fixing the cylinder body;

[0080] Step 5: The pull rod 108 of the pull rod displacement sensor 102 and the piston rod 107 of the micro hydraulic cylinder 101 achieve displacement coordination through the connecting plate 110, that is, the piston rod 107 is pushed out to form a synchronous monitoring feedback that can be monitored by the pull rod 108;

[0081] Step 6: The probe 103 at the end of the micro hydraulic cylinder 101 is connected and fixed to the piston rod 106 via the first threaded rod 107. The micro hydraulic cylinder 101 pushes out the piston rod 106, and the probe penetrates into the concrete. The pressure sensor integrated in the cylinder feeds back the pressure value on the probe, and the concrete strength value of the well wall can be obtained by conversion;

[0082] Step 7: In the initial setting stage of concrete, the concrete strength is the mortar strength. Before using the concrete strength testing device, a strength calibration test must be carried out in the laboratory. A concrete strength testing group and a mortar strength testing group must be set up. The concrete strength testing group uses a new testing device to detect the concrete penetration resistance value, and the mortar strength testing group uses a penetrometer to detect the strength value. Every 30 minutes, multiple-point strength is measured to find the conversion relationship between the concrete penetration resistance strength and the mortar strength, and to determine parameters such as the probe form and probe penetration depth.

[0083] Step 8: The slip form steel template 5 is equipped with an openable oblong hole template. It is closed during concrete pouring to ensure that there is no leakage. When the template is lifted, the surface of the concrete will not be damaged. When testing the strength, the oblong hole template is opened to provide space for the probe to penetrate the concrete.

[0084] Step 9: The electrical control system 6 needs to be customized and developed to meet the needs of the concrete strength detection device, realize one-button detection, data acquisition-processing-display, control the solenoid valve group and other functions.

[0085] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A shaft slipform concrete strength detection device, characterized by: It comprises a concrete strength detection unit (1), a micro hydraulic cylinder fixing part (2), a slider guide assembly (3), a detection device fixing bracket (4), a sliding form steel template (5), an electrical control system (6), a hydraulic solenoid valve (7), a hydraulic oil pump (8) and a sliding form platform (9); The slipform steel template (5) is paved outside the shaft wall concrete (10) of the slipform platform (9); the detection device fixing bracket (4) is installed outside the slipform steel template (5); the detection device fixing bracket (4) is provided with a slider guide assembly (3); the micro hydraulic cylinder fixing member (2) is slidably connected to the slider guide assembly (3); the concrete strength detection unit (1) is installed on the micro hydraulic cylinder fixing member (2); the hydraulic oil pump (8) is connected to the concrete strength detection unit (1) through a hydraulic solenoid valve (7); and the electrical control system (6) is electrically connected to the hydraulic solenoid valve (7) and the hydraulic oil pump (8), respectively.

2. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The concrete strength detection unit (1) comprises a micro hydraulic cylinder (101), a pull-rod displacement sensor (102) and a probe (103); the pull-rod displacement sensor (102) is connected to the side of the micro hydraulic cylinder (101); and the output end of the micro hydraulic cylinder (101) is connected to the probe (103).

3. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The end of the micro hydraulic cylinder (101) is connected to a first fixing plate (104), the middle side of the micro hydraulic cylinder (101) is provided with a second fixing plate (105), and the pull rod type displacement sensor (102) is fixed to the first fixing plate (104) and the second fixing plate (105) by bolts.

4. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The piston rod (106) of the micro hydraulic cylinder (101) is connected to a first threaded rod (107), the first threaded rod (107) is threadedly connected to the probe (103), the output end of the pull rod type displacement sensor (102) is provided with a pull rod (108), the pull rod (108) is connected to a second screw rod (109), and a connecting plate (110) is connected between the piston rod (106) and the second threaded rod (109).

5. The shaft slipform concrete strength detection device according to claim 1, characterized in that: The micro hydraulic cylinder (101) is internally integrated with a pressure sensor, which can output the pressure value borne by the end of the piston rod (106) in the form of an electrical signal.

6. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The micro hydraulic cylinder fixing part (2) is L-shaped, and four fixing holes (201) are reserved on the vertical plate at the end of the micro hydraulic cylinder fixing part (2). The micro hydraulic cylinder (101) is connected and fixed to the micro hydraulic cylinder fixing part (2) via the fixing holes (201), bolts, and nuts.

7. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The slider guide rail assembly (3) is provided with multiple groups, preferably two groups, and the slider guide rail assembly (3) includes a slider (301) and a guide rail (302). The guide rail (302) is fixed to the detection device fixing bracket (4) by bolts. The slider (301) is connected to the micro-cylinder fixing member (2). The shape of the guide rail (302) and the slider (301) slot are mutually engaged, and the slider (301) is provided with a steel ball inside, thereby achieving the slider (301) and the guide rail (302) being fixed and sliding, meeting the requirement that the concrete strength detection device can be switched with different detection points.

8. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The length of the guide rail (302) is consistent with the length of the concrete strength detection section (11). There are a total of 8 concrete strength detection sections (11), which are evenly distributed around the slipform. The length of each concrete strength detection section (11) must ensure detection and measurement at no less than 3 monitoring points.

9. A shaft slipform concrete strength detection device according to claim 1, characterized in that: The electrical control system (6) controls the hydraulic solenoid valve (7) to realize the oil inflow and outflow of the micro hydraulic cylinder (101), thereby controlling the extension and retraction of the probe (103) of the strength monitoring unit.

10. A method for detecting strength of a shaft slipform concrete according to any one of claims 1 to 9, characterized in that: The method steps are: Manually open the oblong detection hole of the sliding steel template; input the penetration depth L0 of the probe on the electrical control cabinet; One-button start of concrete strength testing, the electrical control system controls the hydraulic solenoid valve to open and the hydraulic oil circuit to supply oil; Oil enters the micro hydraulic cylinder, the piston rod pushes out, driving the displacement sensor pull rod to pull out, and at the same time the probe at the end of the piston rod penetrates the concrete of the shaft wall; During the ejection process of the micro hydraulic cylinder piston rod, the displacement sensor monitors and feeds back the piston rod displacement L1 in real time and transmits it to the electrical control system to determine whether to continue oiling. When L1=L0, the electrical control system controls the hydraulic solenoid valve to close and stop oiling. The probe penetrates to a depth of L0 and remains there for about 5 seconds to collect information on the concrete penetration resistance. After 5 seconds, the electrical control system controls the solenoid valve and the oil pump to return oil, the piston rod retracts, and the probe exits the concrete. According to the conversion relationship obtained from the laboratory calibration test, the collected concrete penetration resistance value is converted into the concrete strength value; Three detection points can be set in one detection section, and eight monitoring sections can be set on the sliding platform, for a total of 24 detection points; After completing the inspection of one point in a detection section, the strength detection unit is manually pushed to the second detection point, and so on; 24 test values ​​are obtained, 2 maximum values ​​and 2 minimum values ​​are deleted, and 20 values ​​are retained. The average value of the 20 test values ​​is calculated. The electrical control system determines whether the test average value is within the range of [0.2Mpa, 0.4Mpa]. If the test average value is within this range, the on-site management personnel are prompted to carry out the slipform jacking process. Otherwise, the concrete strength is tested every 1 hour until the jacking is completed. After completing the slipform jacking process, the probe at the end of the piston rod is manually removed and the residual mortar on the probe surface is cleaned to avoid affecting the accuracy of the next concrete strength test.

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