Detection device for rapidly detecting initial strength of concrete by embedding template system

Abstract

The invention relates to the technical field of concrete detection equipment, in particular to a detection device for quickly detecting the initial strength of concrete by embedding a template system, which comprises independent steel templates which are used as detection pressure units and are separately arranged on the inner side of a slip form steel template, and the independent steel templates are in direct contact with a concrete surface; the unit contact area of the independent steel templates is defined as S; the limiting device is assembled between the slip form steel template and the independent steel template and is used for keeping the independent steel template in a non-working state flush with the inner side of the slip form steel template; and the electric press is in transmission connection with the independent steel template. According to the detection device for rapidly detecting the initial strength of the concrete by embedding the template system, the independent steel template is in direct contact with the concrete in the template, and the strength data of the concrete body is directly obtained in a detection mode of penetration at a specific depth in unit area; and the problem of deviation between the mortar strength and the concrete body strength is avoided.

Description

Technical Field

[0001] This invention relates to the field of concrete testing equipment technology, and more specifically, to a testing device for rapidly detecting the initial strength of concrete embedded in a formwork system. Background Technology

[0002] In the field of construction engineering, slipform construction technology is widely used in tall vertical structural projects such as grain silos, silos, and bridge piers (e.g., the Huanghua Grain Depot project) due to its advantages such as high construction efficiency, good structural integrity, and stable forming quality. During the construction of such projects, the precise control of the initial strength of the concrete is directly related to construction safety and structural quality, and relevant standards have made clear and mandatory requirements in this regard. According to Clause 6.6.3 of the "Technical Standard for Slipform Engineering" GB / T50113 / 2019, the initial slipforming should be performed only after the strength of the first layer of concrete reaches 0.2MPa~0.4MPa (or the concrete penetration resistance value is 0.30kN / cm). 2 ~1.05kN / cm 2 Only after this can the jack lifting operation be carried out, and a comprehensive inspection of the slipform device and the concrete setting state must be carried out before lifting. At the same time, Article 6, Paragraph (3) of the "Standard for Judging Major Accident Hazards in Housing and Municipal Engineering Production Safety (2024 Edition)" clearly lists "the concrete strength not reaching the design or specification requirements during the dismantling of formwork supports and the lifting of slipform and climbing formwork" as a major accident hazard, further highlighting the necessity of real-time and accurate detection of the initial strength of concrete in slipform construction.

[0003] However, in slipform construction, the concrete is poured inside the formwork and has extremely low initial strength (0.2MPa~0.4MPa). Traditional testing technologies cannot meet the testing requirements of "real-time, intuitive, accurate, and safe," and existing solutions have significant shortcomings: The manual experience-based judgment method relies on on-site workers to judge strength based on the experience standard that "the concrete does not collapse after being demolded, is not lifted by the formwork, leaves a fingerprint when pressed, and the mortar is not sticky to the touch." This method is highly subjective, has extremely low accuracy, and requires the slipform to be raised 1-2 times before testing. This is not only inefficient but also poses safety hazards due to raising the formwork prematurely, and cannot meet the accuracy requirements of the specifications for strength testing.

[0004] The penetration resistance meter testing method, although recommended by the "Technical Standard for Sliding Formwork Engineering," has inherent limitations: First, the test object is mortar after the concrete mixture has been sieved, and the penetration resistance of the mortar indirectly reflects the concrete strength, but it cannot directly measure the actual strength of the concrete inside the formwork, resulting in a deviation between the test results and the actual project. Second, the test requires manual sampling and testing on the operating platform at regular intervals (every half hour), which is inefficient. Third, before the formal slipforming is completed, a penetration resistance-time variation curve needs to be pre-plotted for the specific project's concrete mix ratio, construction environment, construction time, and other parameters. This process consumes additional construction time and labor costs, and the curve has poor universality, requiring repeated tests for different projects, further increasing construction costs and schedule pressure. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid testing device for the initial strength of concrete embedded in a formwork system, thereby addressing the issue in the background art where strength is judged by on-site workers based on empirical standards such as "the concrete does not collapse after demolding, is not lifted by the formwork, leaves a visible fingerprint when pressed, and the mortar is not sticky." This method is highly subjective, has extremely low accuracy, and requires the formwork to be raised 1-2 times before testing can begin. This is not only inefficient but also poses safety hazards due to premature formwork lifting, failing to meet the accuracy requirements for strength testing as specified in the standards.

[0006] To achieve the above objectives, the present invention provides a testing device for rapidly detecting the initial strength of concrete embedded in a template system, comprising an independent steel template as a pressure testing unit, which is separately arranged inside the slipform steel template. The independent steel template is in direct contact with the concrete surface, and the unit contact area of ​​the independent steel template is defined as S. A limiting device is installed between the slipform steel template and the independent steel template to keep the inner side of the independent steel template flush with the inner side of the slipform steel template when it is not in operation. An electric press is connected to the independent steel template and is used to apply a preset pressure F0 to the independent steel template. The stroke when applying pressure is fixed at 2mm. A pressure sensor, built into the electric press, is used to detect the actual pressure F1 during the pressure application process in real time; The data transmission processing module is connected to the pressure sensor signal. The data transmission processing module is configured to: calculate the concrete penetration resistance F according to the formula F=F1-F0, and calculate the initial strength P of the concrete according to the formula P=F / S. At the same time, it can wirelessly transmit the strength data to the data management platform, and can link with the slipform sliding control system or output warning information that the strength does not meet the requirements. The warning information includes on-site audible and visual alarms and remote SMS alarms pushed to the technical contact terminal.

[0007] This setup involves five components working in tandem: an independent steel formwork directly contacts the concrete (fixed area S), a limiting device keeps it flush with the slipform formwork when not in use, an electric press applies pressure at a fixed pressure F0 and a fixed stroke of 2mm, a pressure sensor measures the actual pressure F1, a data module calculates the strength P=F / S, and wirelessly transmits data and triggers early warnings.

[0008] As a preferred embodiment of the present invention, the independent steel formwork is not close to the bottom of the slipform steel formwork, and its installation height does not exceed 20cm above the bottom of the slipform steel formwork.

[0009] This setting sets the independent steel formwork to "not close to the bottom of the slipform steel formwork, and the installation height is ≤ 20cm above the bottom". This height corresponds to the "lowest layer of concrete in the formwork" (i.e. the first batch of concrete poured and the first layer to reach the initial setting strength) that needs to be tested during the initial slipform. At the same time, "not close to the bottom" can avoid concrete leakage at the formwork splicing gaps (the bottom is the part of the formwork splicing that is prone to leakage, and the independent steel formwork is away from the gaps to reduce the number of gaps).

[0010] As a preferred embodiment of the present invention, the number of independent steel templates is at least one, and they are evenly distributed along the inner side of the slipform steel template.

[0011] This setting specifies that the number of independent steel formwork is "≥1 and evenly distributed along the inner side of the slipform steel formwork". By uniformly covering the inner area of ​​the slipform formwork at multiple points, it avoids the "local deviation" of single-point detection (such as strength fluctuations caused by uneven local mix proportions or vibration differences during concrete pouring), and ensures that the test data can represent the overall strength state of the concrete inside the formwork.

[0012] As a preferred embodiment of the present invention, the limiting device is a spring limiting mechanism or a bolt limiting mechanism, one end of the limiting device is fixedly connected to the slipform steel template, and the other end is elastically abutted against the independent steel template.

[0013] This setup employs either a spring-loaded or bolt-loaded limiting mechanism, with one end fixed to the slipform steel template and the other end elastically abutting against the independent steel template. The spring mechanism utilizes the elastic tension of the spring to press the independent steel template flush when not in use, and can be compressed during operation by the electric press, without hindering the movement of the independent steel template. The bolt-loaded limiting mechanism uses the adjustable elasticity of the bolt (such as a bolt with a spring washer) to achieve both limiting and fixing, while allowing slight displacement of the independent steel template during pressure application, avoiding component damage caused by rigid connections.

[0014] As a preferred embodiment of the present invention, the stroke accuracy of the electric press is ±0.2mm, and the duration of applying the preset pressure F0 is 10s±2s.

[0015] This setting configures the electric press to have a stroke accuracy of ±0.2mm and a duration of applying the preset pressure F0 of 10s±2s: Stroke accuracy: Ensures that the depth of each penetration into the concrete is strictly controlled within 2mm (error ≤0.2mm), conforming to the detection logic of "specific depth of penetration per unit area," avoiding errors in penetration resistance calculation due to depth deviation; Pressing time: Refers to the operation time requirements of the penetration resistance meter in the "Technical Standard for Sliding Formwork Engineering" (10s±2s), ensuring a stable pressing process and reducing problems such as "rapid pressing leading to local concrete breakage" or "slow pressing leading to delayed strength determination."

[0016] As a preferred embodiment of the present invention, the data transmission processing module includes a data storage unit and a wireless communication unit. The data storage unit is used to cache pressure data, penetration resistance data, and strength calculation results. The wireless communication unit transmits data using Bluetooth, WiFi, or 4G / 5G communication protocols.

[0017] This data transmission processing module includes a "data storage unit (61)" and a "wireless communication unit (62)": The storage unit caches pressure data (F0, F1), penetration resistance (F) and strength results (P) to facilitate later traceability of the testing process and meet the needs of construction record verification; The wireless communication unit adopts Bluetooth (short-range on-site transmission), WiFi / 4G / 5G (remote transmission) to adapt to different construction scenarios (such as on-site management personnel using Bluetooth to view real-time data, and headquarters monitoring the progress of multiple projects through 4G / 5G), without the need for wired lines, and adapts to the mobility of slipform construction.

[0018] In a preferred embodiment of the present invention, the material of the independent steel formwork is the same as that of the slipform steel formwork, and the thickness of the independent steel formwork is the same as that of the slipform steel formwork. The independent steel formwork has a rectangular structure with a single side length of 10cm-20cm, corresponding to a unit contact area S of 0.01m². 2 -0.04m 2 .

[0019] This setting specifies that the independent steel formwork has the same material / thickness as the slipform steel formwork, and the rectangular side length is 10cm-20cm (area 0.01m²). 2 -0.04m 2 "Material / Thickness Consistency": Ensures that the mechanical properties (such as rigidity and strength) of the independent steel formwork and the slipform formwork are matched, so that the force is evenly distributed when the slipform is lifted, avoiding deformation or damage to the formwork due to material differences; Size Setting: Side length 10-20cm (area 0.01-0.04m²) 2If the value is too small, the test data may not be representative enough (the local concrete strength deviation has a significant impact); if it is too large, it will increase the pressure load on the electric press (requiring a larger F0). This size range balances "test representativeness" and "equipment load".

[0020] As a preferred embodiment of the present invention, it further includes a callback drive module, which is linked with the electric press signal to drive the independent steel template to quickly return to the initial position flush with the inner side of the slipform steel template after the pressure is applied.

[0021] This setting enables the callback drive module (7) to be "signal-linked" with the electric press. After the pressure is applied, the independent steel formwork is immediately driven to reset. During the test, the electric press applies pressure to move the independent steel formwork towards the concrete side. After the test is completed, the press sends a signal to the callback module. The module uses cylinders, motors and other power components to quickly pull the independent steel formwork back to the initial position flush with the slipform formwork, thus avoiding the independent steel formwork from bulging for a long time and affecting subsequent concrete pouring or slipform lifting.

[0022] As a preferred embodiment of the present invention, the electric press and the data transmission processing module are integrated and assembled on the outside of the slipform steel template, and are sealed to the slipform steel template by a waterproof sealing ring.

[0023] This setup integrates the electric press and data transmission processing module onto the outside of the slipform steel formwork and seals them with a waterproof sealing ring. External installation avoids occupying the pouring space inside the formwork, preventing contamination or damage from direct contact between the components and concrete, and facilitating on-site maintenance. The waterproof sealing ring prevents rainwater and mortar from seeping into the components, protecting circuitry (such as the data module) and mechanical structures (such as the press's transmission components) from short circuits or corrosion.

[0024] As a preferred embodiment of the present invention, the concrete contact surface of the independent steel formwork is provided with a tungsten carbide wear-resistant coating, the coating thickness is 0.1mm~0.3mm, and the surface roughness Ra of the coating is ≤1.6μm.

[0025] This feature includes a 0.1mm~0.3mm tungsten carbide wear-resistant coating on the concrete contact surface of the independent steel formwork, with a surface roughness Ra≤1.6μm. The tungsten carbide coating has high hardness (HV1800-2200) and strong wear resistance, reducing frictional wear on the formwork contact surface during concrete pouring, vibration, and testing. The low roughness (Ra≤1.6μm) ensures a smooth contact surface, reducing the adhesion between the concrete and the formwork, preventing damage to the concrete surface after testing due to adhesion, and also reducing resistance during the repositioning of the independent steel formwork.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this embedded formwork system for rapid testing of the initial strength of concrete, an independent steel formwork directly contacts the concrete inside the formwork, using a "specific depth penetration per unit area" testing method to directly obtain the concrete's strength data. Compared to the indirect method of testing sieved mortar with a penetration resistance meter, this avoids the problem of "deviation between mortar strength and concrete strength." Simultaneously, relying on an electric press with a fixed 2mm stroke and a pressure sensor to collect pressure data in real time, the strength is calculated using the formula P=F / S (F=F1-F0), replacing the subjective standard of manual experience judgment. This significantly improves testing accuracy and ensures that the test results meet the control requirements for initial strength of 0.2MPa~0.4MPa in the "Technical Standard for Sliding Formwork Engineering" GB / T50113 / 2019.

[0027] 2. The device for rapidly detecting the initial strength of concrete embedded in the template system has several advantages. First, the device is integrated inside the slipform steel template, eliminating the need for manual sampling and testing on the operating platform at regular intervals (once every half hour). The electric press can automatically complete the pressure application and data acquisition process, reducing manual intervention. Second, unlike traditional penetration resistance testing, it eliminates the need to pre-draw "penetration resistance-time variation curves" for different projects and concrete mixes, saving the time and labor costs of curve testing. The strength can be determined directly through real-time detection data, shortening the slipform construction preparation cycle and reducing the overall project cost.

[0028] 3. In this embedded formwork system for rapid testing of initial concrete strength, traditional manual judgment requires lifting the formwork by 1-2 jack strokes before concrete strength can be tested, posing a safety risk of insufficient strength after formwork lifting. This device eliminates the need to lift the formwork, directly testing concrete strength within the formwork, thus avoiding the major accident hazard of "premature formwork lifting" from the source. This meets the concrete strength requirements of the "Standard for Judging Major Accident Hazards in Housing and Municipal Engineering Production Safety (2024 Edition)". Simultaneously, the data transmission processing module can be linked to the slipform lifting control system. If the strength does not meet the requirements, it can simultaneously trigger on-site audible and visual alarms and remote SMS alarms via the technical contact terminal, achieving timely early warning and control of safety risks.

[0029] 4. In this embedded template system for rapid testing of the initial strength of concrete, the limiting device ensures that the inner sides of the independent steel template and the slipform steel template remain flush when not in operation, preventing the protrusion of the testing components from affecting the surface forming quality of the concrete. After pressure is applied, the retraction drive module can drive the independent steel template to quickly reset. Combined with the friction between the non-independent slipform steel template and the concrete surface, the marks left by the test can be initially processed. Subsequent simple manual polishing is all that is needed to complete the process, without adding extra cost to the concrete appearance repair. In addition, the electric press and data transmission processing module are integrated on the outside of the slipform steel template and sealed with a waterproof sealing ring. This not only prevents damage to the core components from rainwater and mortar during construction but also does not occupy the construction space inside the template, achieving a seamless integration of the testing function and the slipform system.

[0030] 5. In this embedded template system for rapid testing of the initial strength of concrete, the independent steel templates use the same material and thickness as the slipform steel templates, and the concrete contact surface is coated with a 0.1mm~0.3mm thick tungsten carbide wear-resistant coating (surface roughness Ra≤1.6μm), which can reduce the wear of the templates by concrete friction and extend the service life of the independent steel templates. At the same time, the number of independent steel templates can be set to at least one and evenly distributed along the inner side of the slipform steel templates, which can be flexibly adjusted according to the slipform structure size and testing point requirements, adapting to different types of slipform construction projects such as grain silos, silos, and bridge piers, thus improving the versatility of the device. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the data transmission processing module in this invention; The meanings of the labels in the diagram are as follows: 1. Independent steel formwork; 2. Slipform steel formwork; 3. Limiting device; 4. Electric press; 5. Pressure sensor; 6. Data transmission processing module; 61. Data storage unit; 62. Wireless communication unit; 7. Callback drive module. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides a detection device for rapidly detecting the initial strength of concrete embedded in a template system, such as... Figures 1-3 As shown, it includes an independent steel formwork 1, which serves as a pressure detection unit and is separated and set inside the slipform steel formwork 2. The independent steel formwork 1 is in direct contact with the concrete surface, and the unit contact area of ​​the independent steel formwork 1 is defined as S. The limiting device 3 is installed between the slipform steel template 2 and the independent steel template 1 to keep the inner side of the independent steel template 1 and the slipform steel template 2 flush when not in operation. The electric press 4 is connected to the independent steel template 1 for applying a preset pressure F0 to the independent steel template 1, and the stroke when applying pressure is fixed at 2mm. Pressure sensor 5, built into electric press 4, is used to detect the actual pressure F1 in real time during the pressure application process; The data transmission processing module 6 is connected to the pressure sensor 5. The data transmission processing module 6 is used to: ensure that the depth from the concrete surface to the device is fixed during each test by using the scale markings on the independent steel template; or to collect concrete pouring depth data in real time, match the lateral pressure parameters at the corresponding depth, first calculate the original concrete penetration resistance F according to the formula F=F1-F0, then deduct the lateral pressure influence value P1 of the concrete on the steel template at the current depth, and obtain the actual initial strength P of the concrete according to the formula P=(F / S)-P1. P1 is preset based on the correspondence between the fixed mix ratio and the test depth. The corrected strength data is wirelessly transmitted to the data management platform, which can be linked to the slipform lifting control system or output warning information, including on-site audible and visual alarms and remote SMS alarms.

[0034] Specifically, the independent steel formwork 1 is not close to the bottom of the slipform steel formwork 2, and its installation height does not exceed 20cm above the bottom of the slipform steel formwork 2.

[0035] Independent steel formwork 1 is not directly adjacent to the bottom of slipform steel formwork 2, and its installation height is ≤20cm above the bottom of 2. This corresponds to the "lowest layer of concrete inside the formwork" that needs to be tested during the initial slipforming, and it is far away from the easily leaking area at the bottom of 2, reducing grout leakage through gaps. It accurately identifies the key testing layer for the initial slipforming, and the data is directly linked to 2 to improve decision-making and avoid misjudgment; it avoids the risk of grout leakage when 1 is close to the bottom of 2, reducing the cost of repairing honeycomb and pitted concrete surfaces.

[0036] Furthermore, there is at least one independent steel formwork 1, which is evenly distributed along the inner side of the slipform steel formwork 2.

[0037] The number of independent steel formwork 1 is ≥1, evenly distributed along the inner side of slipform steel formwork 2: multiple points cover the inner side of 2, avoiding local deviations in single-point testing such as uneven concrete mix ratio / vibration, ensuring that the data represents the overall strength. Cross-verification of multi-point data reduces random errors and avoids misjudgments caused by localized strength anomalies; the number can be adjusted according to the perimeter / height of 2, such as 2-3 for small silos and 4-6 for large grain silos, offering strong versatility.

[0038] Furthermore, the limiting device 3 is a spring limiting mechanism or a bolt limiting mechanism. One end of the limiting device 3 is fixedly connected to the sliding formwork steel template 2, and the other end is elastically abutted against the independent steel template 1.

[0039] The limiting device 3 is a spring / bolt mechanism: one end is fixed to the sliding formwork steel template 2, and the other end elastically abuts against the independent steel template 1. When not in operation, it presses against 1 to make it flush with 2; when in operation, it can be compressed without hindering the movement of 1, avoiding damage to components from rigid connections. It balances limiting and flexibility, preventing jamming and damage; the mechanism is low-cost, easy to procure, and convenient for later maintenance.

[0040] Furthermore, the electric press 4 has a stroke accuracy of ±0.2mm and the duration of applying the preset pressure F0 is 10s±2s.

[0041] The electric press has a 4-stroke accuracy of ±0.2mm, ensuring a penetration depth of 2mm. The pressure application duration (F0) is 10s ±2s, referencing GB / T50113 / 2019. This avoids depth deviations leading to incorrect resistance calculations or varying pressure application rates causing misjudgments of strength. Standardized testing conditions ensure good data repeatability; the pressure application time conforms to specifications, making the results easily accepted and reducing acceptance disputes.

[0042] Furthermore, the data transmission processing module 6 includes a data storage unit 61 and a wireless communication unit 62. The data storage unit 61 is used to cache pressure data, penetration resistance data, and strength calculation results. The wireless communication unit 62 transmits data using Bluetooth, WiFi, or 4G / 5G communication protocols.

[0043] The data transmission processing module 6 includes a storage unit 61 and a wireless communication unit 62: 61 caches F0 / F1, F, and P data for easy traceability; 62 transmits data via Bluetooth / WiFi / 4G / 5G, eliminating the need for wiring and adapting to the mobility of slipform construction. Data traceability meets archiving requirements, avoiding liability disputes; it enables "site-platform-terminal" linkage, eliminating the need for on-site management personnel and improving efficiency.

[0044] Furthermore, the material of the independent steel formwork 1 is the same as that of the slipform steel formwork 2, and the thickness of the independent steel formwork 1 is the same as that of the slipform steel formwork 2. The independent steel formwork 1 has a rectangular structure with a single side length of 10cm-20cm, corresponding to a unit contact area S of 0.01m². 2 -0.04m 2 .

[0045] Independent steel formwork 1: Material / thickness same as slipform steel formwork 2; rectangular side length 10-20cm; area 0.01-0.04m². 21. The mechanical properties of components 1 and 2 are matched to avoid deformation during lifting of component 2; dimensional balance is achieved between "test representativeness" and "4 applied pressure load". The compatibility between components 1 and 2 does not affect the stability of lifting component 2; the power requirement for component 4 is reduced, resulting in lower equipment cost / energy consumption and reliable data.

[0046] Furthermore, it also includes a callback drive module 7, which is signal-linked with the electric press 4 to drive the independent steel template 1 to quickly retract to the initial position flush with the inner side of the slipform steel template 2 after the pressure is applied.

[0047] The callback drive module 7 is linked with the electric press 4: after pressure is applied, it drives the independent steel formwork 1 to quickly reset, making it flush with the inner side of the slipform steel formwork 2, thus avoiding 1 protrusion affecting subsequent pouring / 2 lifting. Automatic reset saves labor and does not delay the construction progress; it avoids leaving marks on 1, reducing the amount of concrete finishing work.

[0048] Furthermore, the electric press 4 and the data transmission processing module 6 are integrated and assembled on the outside of the slipform steel template 2, and are sealed to the slipform steel template 2 through a waterproof sealing ring.

[0049] The electric press 4 and data transmission processing module 6 are integrated and mounted on the outside of the slipform steel formwork 2, sealed with a waterproof sealing ring. This prevents them from occupying the internal pouring space, avoiding concrete contamination and damage, and preventing rainwater / grout from seeping into the components. The absence of internal components ensures smooth concrete pouring / vibration; the components are protected from damage, resulting in a low failure rate, extended lifespan, and reduced long-term costs.

[0050] Furthermore, the concrete contact surface of the independent steel formwork 1 is provided with a tungsten carbide wear-resistant coating with a coating thickness of 0.1mm~0.3mm and a surface roughness Ra≤1.6μm.

[0051] Independent steel formwork: 1. The concrete contact surface is coated with a 0.1-0.3mm tungsten carbide wear-resistant coating HV1800-2200, with a roughness Ra≤1.6μm. This reduces frictional loss with concrete, lowers adhesion, prevents concrete damage, and minimizes repositioning resistance. Replacement cycles are extended by 3-5 times, reducing material costs. The concrete exits smoothly, reducing manual repairs and improving construction quality.

[0052] The detection device for rapid detection of initial strength of concrete using an embedded template system according to the present invention comprises the following steps: Phase 1: Non-working preparation (before concrete pouring / slipform lifting gap) Component placement: Install the independent steel formwork 1 separately inside the slipform steel formwork 2, ensuring that its installation height does not exceed 20cm above the bottom of the slipform steel formwork 2 (avoiding the grout leakage area and aligning with the lowest layer of concrete to be tested), and that the number is ≥1 and evenly distributed along the inside of the slipform steel formwork 2; Limit calibration: The independent steel template 1 is tightened by the limit device 3 (spring / bolt mechanism) so that the independent steel template 1 is completely flush with the inner side of the slipform steel template 2 when it is not in operation, so as to avoid the protrusion affecting the surface forming during concrete pouring. Equipment preheating: Start the electric press 4 and the data transmission processing module 6, calibrate the accuracy of the pressure sensor 5 (to ensure accurate acquisition of pressure F1), and establish a connection with the management platform and technical contact terminal through the wireless communication unit 62 (Bluetooth / WiFi / 4G / 5G) of the data transmission processing module 6 to complete the preparation before testing.

[0053] Phase 2: Strength testing (after initial concrete setting, before slipform lifting) Pressure application start: The operation data transmission processing module 6 sends a detection command. After receiving the command, the electric press 4 applies a preset pressure F0 to the independent steel formwork 1. At the same time, the pressure stroke is strictly controlled (accuracy ±0.2mm) to ensure that the penetration depth of the independent steel formwork 1 into the concrete side is exactly 2mm, and the pressure application duration is maintained at 10s±2s (in accordance with the requirements of the "Technical Standard for Sliding Formwork Engineering" GB / T50113 / 2019). Pressure acquisition: During the pressurization process, the pressure sensor 5 built into the electric press 4 collects the actual pressure F1 in real time (including the equipment's own operating pressure and concrete resistance), and transmits the pressure data synchronously to the data transmission processing module 6.

[0054] Phase 3: Data Processing and Linkage Feedback Strength Calculation: After receiving the pressure data, the data transmission processing module 6 first calculates the concrete penetration resistance F (F=F1-F0) using a built-in algorithm, and then combines this with the unit area S (0.01m²) of the independent steel formwork 1. 2 -0.04m 2 (Determined by a rectangular structure with a side length of 10cm-20cm), the initial strength P of the concrete is calculated using "P=F / S-P1"; Data storage and transmission: The storage unit 61 of the data transmission processing module 6 automatically caches information such as pressure data (F0, F1), penetration resistance F, and strength P, and simultaneously uploads the strength P to the data management platform in real time through the wireless communication unit 62 for managers to view; Results feedback: If the strength P is between 0.2MPa and 0.4MPa (within the specified range), the data transmission processing module 6 sends a "lifting permitted" signal to the slipform lifting control system, and the slipform can start lifting normally. If the strength P is lower than 0.2MPa (does not meet the requirements), the data transmission processing module 6 will immediately trigger a dual alarm: first, an on-site audible and visual alarm (reminding construction personnel to suspend lifting); second, a remote SMS alarm will be sent to the technical contact terminal (informing them of the strength failure), to prevent the slipform from being lifted prematurely and causing safety hazards.

[0055] Phase 4: Reset after detection (completed in a single detection) Automatic callback: After the detection result feedback is completed, the callback drive module 7 receives the linkage signal of the electric press 4 and drives the independent steel template 1 to move quickly to the side of the slip form steel template 2 until it is flush with the inner side of the slip form steel template 2 again, and returns to the non-working state. Subsequent handling: After the independent steel formwork 1 is reset, when the slipform steel formwork 2 is subsequently lifted, the friction between its non-independent area and the concrete surface can initially eliminate the marks left by the penetration of the independent steel formwork 1. If there are still local marks, they can be simply repaired by manual polishing after the concrete is demolded, without affecting the appearance quality of the concrete.

[0056] After a single inspection process is completed, the device waits for the next inspection instruction (the inspection interval can be set according to construction needs, such as 15-30 minutes / time), and repeats the process of stages 2-4 above until the slipform construction is completed.

[0057] Finally, it should be noted that the electronic components in the data transmission processing module 6 and other components in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A testing device for rapidly detecting the initial strength of concrete embedded in a template system, characterized in that: include Independent steel formwork (1), as a pressure detection unit, is set separately on the inner side of the slipform steel formwork (2). The independent steel formwork (1) is in direct contact with the concrete surface, and the unit contact area of ​​the independent steel formwork (1) is defined as S. A limiting device (3) is installed between the slipform steel template (2) and the independent steel template (1) to keep the inner side of the independent steel template (1) and the slipform steel template (2) flush when not in operation. An electric press (4) is connected to the independent steel template (1) for applying a preset pressure F0 to the independent steel template (1), and the stroke when applying pressure is fixed at 2mm. A pressure sensor (5) is built into the electric press (4) and is used to detect the actual pressure F1 during the pressure application process in real time. The data transmission processing module (6) is connected to the pressure sensor (5) and is configured to: ensure that the depth of the concrete surface to the device is fixed each time the scale markings on the independent steel template (1) are used; or collect concrete pouring depth data in real time, match the lateral pressure parameters at the corresponding depth, calculate the original concrete penetration resistance F according to the formula F=F1-F0, deduct the lateral pressure influence value P1 of the concrete on the steel template at the current depth, and obtain the actual initial strength P of the concrete according to the formula P=(F / S)-P1. P1 is preset based on the correspondence between the fixed mix ratio and the detection depth, and wirelessly transmit the corrected strength data to the data management platform. It can link the slipform lifting control system or output warning information, including on-site audible and visual alarms and remote SMS alarms.

2. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The independent steel formwork (1) is not close to the bottom of the slipform steel formwork (2), and its installation height does not exceed 20cm above the bottom of the slipform steel formwork (2).

3. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The number of independent steel templates (1) is at least one, and they are evenly distributed along the inner side of the slipform steel template (2).

4. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The limiting device (3) is a spring limiting mechanism or a bolt limiting mechanism. One end of the limiting device (3) is fixedly connected to the slipform steel template (2), and the other end is elastically abutted against the independent steel template (1).

5. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The electric press (4) has a stroke accuracy of ±0.2mm and the duration of applying the preset pressure F0 is 10s±2s.

6. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The data transmission processing module (6) includes a data storage unit (61) and a wireless communication unit (62). The data storage unit (61) is used to cache pressure data, penetration resistance data and strength calculation results. The wireless communication unit (62) transmits data using Bluetooth, WiFi or 4G / 5G communication protocols.

7. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The material of the independent steel template (1) is the same as that of the slipform steel template (2), and the thickness of the independent steel template (1) is the same as that of the slipform steel template (2). The independent steel template (1) is a rectangular structure with a single side length of 10cm-20cm and a corresponding unit contact area S of 0.01m²-0.04m².

8. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: It also includes a callback drive module (7), which is signal-linked with the electric press (4) to drive the independent steel template (1) to quickly return to the initial position flush with the inner side of the slipform steel template (2) after the pressure is applied.

9. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The electric press (4) and the data transmission processing module (6) are integrated and assembled on the outside of the slipform steel template (2), and are sealed with the slipform steel template (2) through a waterproof sealing ring.

10. The detection device for rapid detection of initial strength of concrete using an embedded template system according to claim 1, characterized in that: The concrete contact surface of the independent steel formwork (1) is provided with a tungsten carbide wear-resistant coating, the coating thickness is 0.1mm~0.3mm, and the surface roughness Ra of the coating is ≤1.6μm.

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