Method for determining the fullness of a fabricated sleeve grouting

Abstract

The application relates to a method for measuring the fullness of a fabricated sleeve grouting, and relates to the technical field of grouting measurement.The method comprises the following steps: S1, splicing adjacent prefabricated components; S2, inserting the pre-embedded steel bars on the prefabricated components into the pre-embedded grouting sleeves in the adjacent prefabricated components; S3, mixing and stirring cement grouting materials in a certain proportion, and injecting the stirred cement grouting materials into the grouting sleeves through grouting holes; S4, collecting the air discharged from the air outlet holes, detecting the air pressure of the air, automatically measuring the grouting fullness by converting the air pressure, and automatically stopping the grouting and pressure maintaining if the grouting fullness reaches a preset value.The application has the effects of reducing the human visual error and improving the accuracy of the grouting fullness measurement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grouting determination, in particular to a method for determining the fullness of assembly sleeve grouting. BACKGROUND

[0002] Assembly sleeve grouting is a construction technology for connecting steel bars in prefabricated components in assembly buildings. It has the advantages of high connection strength, simple construction and wide application range, and is suitable for engineering fields such as reinforced concrete structures, steel structures, bridges, offshore oil platforms and wind power towers.

[0003] At present, during the production stage of prefabricated components, grouting sleeves are pre-buried in the components. When two prefabricated components need to be connected at the construction site, the pre-buried steel bars in one component are inserted into the pre-buried grouting sleeves in the other component, which are used for the connection of vertical components such as shear walls and frame columns, and can also be used for the connection of horizontal components. After the connection of the two prefabricated components is completed, cement grouting material is injected through the grouting holes on the sleeve to fill the gap between the sleeve and the steel bar, forming a tight connection. During grouting, low-hole grouting is performed, and air is discharged through high-hole. Until the grout overflows from the high-hole, it indicates that the grouting is completed. However, in the construction of assembly building sleeve grouting, the detection of grouting fullness is the key to ensure the safety and quality of the structure. The traditional detection method relies on the observation of low-hole grouting and high-hole grouting by human eyes as the evaluation standard. This method has subjectivity and error. SUMMARY

[0004] In order to reduce the human perception error and improve the accuracy of grouting fullness determination, the present application provides a method for determining the fullness of assembly sleeve grouting.

[0005] The method for determining the fullness of assembly sleeve grouting provided by the present application adopts the following technical scheme:

[0006] The method for determining the fullness of assembly sleeve grouting comprises:

[0007] S1, splicing adjacent prefabricated components;

[0008] S2, inserting the pre-buried steel bars on the prefabricated components into the pre-buried grouting sleeves in the adjacent prefabricated components;

[0009] S3, mixing and stirring the cement grouting material according to a certain proportion, and injecting the stirred cement grouting material into the grouting sleeve through the grouting hole;

[0010] S4, collecting the air discharged from the grouting hole, detecting the air pressure of the air, and automatically determining the grouting fullness by converting the air pressure. If the grouting fullness reaches the preset value, the grouting is automatically stopped and the pressure is maintained.

[0011] By adopting the technical scheme, when the fullness of the assembly type sleeve grouting is measured, firstly, the two adjacent prefabricated components are accurately positioned to ensure that the connecting part is accurate, then the embedded steel bars on one prefabricated component are inserted into the embedded grouting sleeve of another prefabricated component to form a preliminary connecting structure, cement grouting material is mixed and stirred according to a specific proportion, the performance of the cement grouting material meets the construction requirement, then the stirred cement grouting material is injected into the grouting sleeve through the grouting hole to fill the gap between the sleeve and the steel bars, in the grouting process, the air in the outlet hole is gradually discharged, the air pressure of the collected air is detected, the fullness of the grouting is automatically calculated through the conversion of the air pressure, when the detected fullness of the grouting reaches a preset standard value, the grouting is automatically stopped and pressure is maintained, then the grouting hole and the outlet hole are plugged by using a special plug, the cement grouting material is fully filled and solidified, and a stable connection is formed; wherein the fullness of the grouting is monitored in real time during the grouting process, and once the preset value is reached, the system automatically stops the grouting, so that the grouting amount is controlled to avoid excess or deficiency, and through the automatic air pressure detection and conversion, the human visual error in the traditional method is avoided, the accuracy and reliability of the fullness detection of the grouting are improved, and the overall construction progress is improved.

[0012] Optionally, in S4, the air discharged from the outlet hole is collected by using a fullness determination device, and the air pressure is detected to know the fullness of the grouting; the fullness determination device comprises:

[0013] a grouting device; the grouting device is provided with a grouting hose for connecting the grouting hole, an air inlet hose for connecting the outlet hole, and a gas collection chamber connected with the air inlet hose;

[0014] a pressure sensor arranged in the gas collection chamber and used for detecting the air pressure in the gas collection chamber and sending a pressure detection signal;

[0015] an air exhaust pipeline arranged in the gas collection chamber, and the air exhaust pipeline is further provided with an air exhaust valve;

[0016] a pressure display module connected with the pressure sensor and used for receiving the pressure detection signal and displaying the air pressure in the gas collection chamber,

[0017] a digital control sensing device connected with the pressure display control module and the grouting device, and used for receiving the pressure detection signal to know the air pressure in the gas collection chamber, and sending a control signal to the grouting device to stop the grouting when the air pressure in the gas collection chamber reaches a preset air pressure value.

[0018] By adopting the technical scheme, after grouting starts, the air discharged from the grouting hole enters the gas collection chamber through the air inlet hose, the pressure sensor monitors the air pressure in the gas collection chamber in real time, and converts the data into a pressure detection signal, which is transmitted to the pressure display module to convert the signal into a readable air pressure value and display it, and the digital control sensing device receives the pressure detection signal and analyzes the air pressure in the gas collection chamber in real time, and when the air pressure in the gas collection chamber reaches a preset qualified air pressure value (such as 2.2 MPa), the digital control sensing device sends a control signal to the grouting device, and the grouting device stops grouting automatically after receiving the control signal, ensuring that the grouting fullness meets the standard; after grouting stops, the construction personnel can discharge the air in the gas collection chamber through the air valve on the air discharge pipeline, and prepare for the next detection; wherein the saturation determination device can automatically and accurately control the grouting process, thereby not only reducing manual intervention, improving construction efficiency and safety, but also accurately controlling the grouting amount, reducing material waste and construction cost, and the cooperation of the pressure sensor and the digital control sensing device realizes accurate detection of the grouting fullness, avoiding human error in the traditional method.

[0019] Optionally, the saturation determination device further comprises two anti-grouting screens respectively arranged at the connection between the grouting hose and the grouting hole and the connection between the air inlet hose and the grouting hole.

[0020] By adopting the technical scheme, during grouting, a small amount of slurry may overflow from the connection under the action of pressure, the anti-grouting screen can prevent the slurry from overflowing, keep the construction site clean, and reduce the waste of slurry.

[0021] Optionally, the saturation determination device further comprises:

[0022] The collection cylinder is arranged on the side of the air inlet hose close to the grouting hole.

[0023] The sealing end cover is detachably connected to the bottom of the collection cylinder.

[0024] By adopting the technical scheme, during grouting, a small amount of cement grouting material may overflow or splash from the grouting hole, the collection cylinder can collect this part of the cement grouting material to prevent it from entering the gas collection chamber and affecting the determination result; and the construction personnel can periodically detach the sealing end cover to clean the cement grouting material inside the collection cylinder, so that the equipment can operate stably for a long time.

[0025] Optionally, the saturation determination device further comprises:

[0026] The backflushing pipe is arranged on the air inlet hose, and the collection cylinder is located between the backflushing pipe and the grouting hole.

[0027] The water inlet valve is arranged on the backflushing pipe.

[0028] An air inlet valve is arranged in the air inlet hose, and is located between the backwashing pipe and the gas collection chamber.

[0029] By adopting the above technical scheme, the backwashing pipe is used to remove residual slurry in the air inlet hose by backwashing after grouting is completed, so as to prevent the air inlet hose from being blocked by solidified slurry; the water inlet valve is used to control water flow in the backwashing process, and when backwashing operation is needed, the water inlet valve is opened, the air inlet valve is closed, and water flows into the backwashing pipe to clean the air inlet hose, so as to ensure smoothness in subsequent use.

[0030] Optionally, a blocking filter screen is arranged at the connection between the air inlet hose and the gas collection chamber.

[0031] By adopting the above technical scheme, the blocking filter screen can effectively block impurities such as dust and cement grouting material from entering the gas collection chamber, keep the inside of the gas collection chamber clean, protect precise components such as sensors in the gas collection chamber from being damaged, and improve detection accuracy.

[0032] Optionally, the air inlet hose is made of transparent material.

[0033] By adopting the above technical scheme, the air inlet hose made of transparent material allows construction personnel to directly observe the state inside the air inlet hose through the human eye, so as to assist in judging the progress and fullness of the grouting process, and timely find abnormal conditions such as grouting blockage and poor flow, so as to ensure smooth progress of the grouting process.

[0034] Optionally, in S3, before grouting, an air compressor is used to check the grouting hole and the slurry outlet hole to ensure that the hole path is unobstructed.

[0035] By adopting the above technical scheme, compressed air is blown into the grouting hole and the slurry outlet hole by the air compressor to check whether the hole path is blocked or contains foreign matter, so as to ensure that the hole path is unobstructed, and avoid grouting failure or reduced grouting quality caused by poor hole path in the grouting process.

[0036] Optionally, in S3, the cement grouting slurry should be grouted within 20-30 minutes after self-watering and stirring.

[0037] By adopting the above technical scheme, the fluidity of the cement grouting slurry gradually decreases over time, and grouting within 20-30 minutes can ensure that the slurry has sufficient fluidity, avoid initial setting of the slurry during grouting, and ensure the fullness and compactness of grouting.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. In the grouting process, the grouting saturation is monitored in real time, and once the preset value is reached, the system automatically stops grouting, thereby controlling the grouting amount, avoiding excess or deficiency, and through automatic air pressure detection and conversion, avoiding the human visual error in the traditional method, improving the accuracy and reliability of the grouting saturation detection, thereby improving the overall construction progress;

[0040] 2. The saturation determination device can automatically and accurately control the grouting process, thereby not only reducing manual intervention and improving construction efficiency and safety, but also accurately controlling the grouting amount, reducing material waste and construction cost, and the cooperation of the pressure sensor and the digital control sensing device realizes accurate detection of the grouting saturation, avoiding human error in the traditional method;

[0041] 3. In the grouting process, a small amount of cement grouting material may overflow or splash from the grouting hole, and the collection cylinder can collect this part of the cement grouting material to prevent it from entering the gas collection chamber and affecting the determination result; and the construction personnel can periodically disassemble the sealing end cover to clean the cement grouting material inside the collection cylinder, so that the equipment can operate stably for a long time, and after grouting is completed, the residual slurry in the air inlet hose is removed by reverse flushing to prevent the slurry from solidifying and blocking the air inlet hose; when reverse flushing is needed, open the water inlet valve and close the air inlet valve, and the water flows through the reverse flushing pipe to clean the air inlet hose, ensuring smoothness in subsequent use. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the saturation determination device in the present application.

[0043] Marked: 1, prefabricated component; 2, grouting sleeve; 21, grouting hole; 22, grouting hole; 3, saturation determination device; 31, grouting device; 311, feeding port; 32, grouting hose; 33, air inlet hose; 331, air inlet valve; 34, gas collection chamber; 341, exhaust pipe; 342, exhaust valve; 343, pressure sensor; 344, pressure display module; 345, digital control sensing device; 35, anti-grouting filter screen; 36, blocking filter screen; 37, collection cylinder; 371, sealing end cover; 38, backflushing pipe; 381, water inlet valve. DETAILED DESCRIPTION

[0044] The following will be described in detail in combination with the accompanying drawings Figure 1 The present application is further described in detail.

[0045] The embodiment of the present application discloses a prefabricated sleeve grouting saturation determination method. Referring to Figure 1 , the prefabricated sleeve grouting saturation determination method comprises:

[0046] S1, adjacent prefabricated components 1 splicing: two adjacent prefabricated components 1 accurate positioning, ensure that the connection site accurate.

[0047] S2, the embedded steel bar on one prefabricated component 1 inserted into the embedded grouting sleeve 2 in another prefabricated component 1, forming a preliminary connection structure.

[0048] S3, according to a certain proportion of mixing cement grouting material, the mixing ratio of cement grouting material depends on the specific application scenario, cement grouting material includes cement, water, and sand, etc., wherein the mixing ratio of cement and water is between 1:0.35-0.45, in order to increase the volume stability of the slurry, the amount of sand added is 10%-30% of the weight of cement. For other materials, according to the specific needs, you can also add expansion agent, water reducing agent, retarder, etc., to meet the specific performance requirements.

[0049] Before grouting, air compressor should be used to check the grouting hole 21 and the outlet hole 22 to ensure that the hole is unobstructed. Compressed air is blown into the grouting hole 21 and the outlet hole 22 through the air compressor to check whether there is blockage or foreign matter inside the hole to ensure that the hole is unobstructed. Avoid grouting failure or grouting quality decline due to poor hole during grouting process. The mixed cement grouting material is injected into the grouting sleeve 2 through the grouting hole 21 to fill the gap between the sleeve and the steel bar. The cement grouting slurry should be completed within 20-30 minutes after starting to mix with water. The fluidity of the cement grouting slurry will gradually decrease with time. Grouting within 20-30 minutes can ensure that the slurry has sufficient fluidity to avoid initial setting of the slurry during grouting, while ensuring the fullness and density of grouting.

[0050] S4, during grouting, air will gradually be discharged from the outlet hole 22. A saturation determination device 3 is used to collect the air discharged from the outlet hole 22 and detect the air pressure. The grouting fullness is automatically determined by converting the air pressure. When the detected grouting fullness reaches the preset standard value, the grouting is automatically stopped and the pressure is maintained. Then a special plug is used to plug the grouting hole 21 and the outlet hole 22, so that the cement grouting material is fully filled and solidified to form a stable connection.

[0051] The saturation degree measuring device 3 comprises a grouting device 31, a feeding port 311 is arranged on the grouting device 31, a grouting hose 32 for connecting the grouting hole 21, an air inlet hose 33 for connecting the slurry outlet hole 22 and a gas collection chamber 34 connected with the air inlet hose 33 are further arranged on the grouting device 31. The grouting hose 32 and the air inlet hose 33 are both provided with anti-slurry leakage screens 35 at the connecting positions of the grouting hose 32 and the grouting hole 21 and the air inlet hose 33 and the slurry outlet hole 22 respectively. A small amount of slurry may overflow from the connecting positions under the action of pressure during the grouting process, and the anti-slurry leakage screens 35 are used to prevent the overflow of the slurry. The air inlet hose 33 is made of transparent polytetrafluoroethylene (PTFE) material, which is used to enable the construction personnel to directly observe the state inside the air inlet hose 33 through the naked eye, so as to assist in judging the progress and saturation degree of the grouting process and timely discovering abnormal conditions such as grouting blockage and poor flow. The connecting position of the air inlet hose 33 and the gas collection chamber 34 is further provided with a barrier filter screen 36, which is used to block impurities such as dust and cement grouting material from entering the gas collection chamber 34. The top of the gas collection chamber 34 is provided with an exhaust pipeline 341, and an exhaust valve 342 is further arranged on the exhaust pipeline 341.

[0052] With reference to Figure 1 The saturation degree measuring device 3 further comprises a pressure sensor 343, a pressure display module 344 and a digital control sensing device 345 arranged in the gas collection chamber 34. The pressure sensor 343 is used to detect the air pressure in the gas collection chamber 34 and send a pressure detection signal. The pressure display module 344 is connected to the pressure sensor 343 and is used to receive the pressure detection signal and display the air pressure in the gas collection chamber 34. The digital control sensing device 345 is connected to the pressure display control module and the grouting device 31, and is used to receive the pressure detection signal to know the air pressure in the gas collection chamber 34. When the air pressure in the gas collection chamber 34 reaches a preset air pressure value, a control signal is sent to the grouting device 31 to stop the grouting of the grouting device 31.

[0053] After the grouting starts, the air discharged from the slurry outlet hole 22 enters the gas collection chamber 34 through the air inlet hose 33. The pressure sensor 343 monitors the air pressure in the gas collection chamber 34 in real time, converts the data into a pressure detection signal, and transmits the pressure detection signal to the pressure display module 344. The pressure display module 344 converts the signal into a readable air pressure value and displays it. The digital control sensing device 345 simultaneously receives the pressure detection signal and analyzes the air pressure in the gas collection chamber 34 in real time. When the air pressure in the gas collection chamber 34 reaches a preset qualified air pressure value (such as 2.2 MPa), the digital control sensing device 345 sends a control signal to the grouting device 31. After receiving the control signal, the grouting device 31 automatically stops grouting to ensure that the grouting saturation degree meets the standard.

[0054] For example, during the production stage of the prefabricated component 1, the grouting sleeve 2 is embedded in the component. Since the volume of the grouting sleeve 2 and the cavities of other parts inside the prefabricated component 1 are standard and constant, the volume of the grouting cavity can be calculated, and automatic grouting can be realized after inputting the digital control sensing device 345. For example, if the actual grouting cavity volume is 1 m³, the cavity volume in the gas collection chamber 34 is 0.1 m³, the grouting pressure is 0.2 MPa, and the measuring instrument is ≥2.2 MPa qualified, and after being qualified, the grouting is automatically stopped by the digital control sensing device 345.

[0055] After the grouting is stopped, the construction personnel can discharge the air in the gas collection chamber 34 through the exhaust valve 342 on the exhaust pipeline 341, and prepare for the next detection. The saturation determination device 3 can automatically and accurately control the grouting process, thereby not only reducing manual intervention, improving construction efficiency and safety, but also accurately controlling the grouting amount, reducing material waste and construction cost, and the cooperation of the pressure sensor 343 and the digital control sensing device 345 realizes accurate detection of the grouting fullness, avoiding human error in the traditional method.

[0056] With reference to Figure 1 , the inlet hose 33 is provided with a collection cylinder 37 on the side close to the grouting hole 22, and the bottom of the collection cylinder 37 is detachably connected with a sealing end cover 371 through threads. The inlet hose 33 is also provided with a backwashing pipe 38, and the collection cylinder 37 is located between the backwashing pipe 38 and the grouting hole 22. The backwashing pipe 38 is provided with a water inlet valve 381, and the inlet hose 33 is provided with an air inlet valve 331, which is located between the backwashing pipe 38 and the gas collection chamber 34.

[0057] During the grouting process, a small amount of cement grouting material may overflow or splash from the grouting hole 22, and the collection cylinder 37 can collect this part of the cement grouting material to prevent it from entering the gas collection chamber 34 and affecting the measurement results. The construction personnel can periodically detach the sealing end cover 371 to clean the cement grouting material inside the collection cylinder 37, so that the equipment can operate stably for a long time. The backwashing pipe 38 is used to clean the residual slurry in the inlet hose 33 by backwashing after grouting is completed, to prevent the slurry from solidifying and blocking the inlet hose 33. The water inlet valve 381 is used to control the water flow during backwashing. When backwashing is needed, the water inlet valve 381 is opened, and the air inlet valve 331 is closed. The water flow enters the backwashing pipe 38 to clean the inlet hose 33, ensuring smoothness in subsequent use.

[0058] The implementation principle of the embodiment of the application is as follows: when the grouting fullness of the assembled sleeve is measured, first, two adjacent prefabricated components 1 are accurately positioned to ensure that the connecting parts are accurate, then the embedded steel bars on one prefabricated component 1 are inserted into the embedded grouting sleeve 2 in the other prefabricated component 1 to form a preliminary connection structure, cement grouting material is mixed and stirred according to a specific proportion, so that the performance of the cement grouting material meets the construction requirements, then the stirred cement grouting material is injected into the grouting sleeve 2 through the grouting hole 21 to fill the gap between the sleeve and the steel bars, in the grouting process, the air in the outlet hole 22 is gradually discharged, the collected air pressure is detected, the grouting fullness is automatically calculated through the conversion of the air pressure, and quantitative analysis is performed, when the detected grouting fullness reaches the preset standard value, the grouting is automatically stopped and pressure is maintained, then the grouting hole 21 and the outlet hole 22 are plugged with special plugs, so that the cement grouting material is fully filled and solidified to form a stable connection; wherein the grouting fullness is monitored in real time during the grouting process, once the preset value is reached, the system automatically stops grouting, so as to control the grouting amount and avoid excess or deficiency, and through the automatic air pressure detection and conversion, the human visual error in the traditional method is avoided, the accuracy and reliability of the grouting fullness detection are improved, and the overall construction progress is improved.

[0059] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A method for determining the fullness of a fabricated sleeve grout, characterized by, The application relates to a method for connecting adjacent prefabricated components (1) and a device for measuring the saturation degree of the grouting. The method comprises the following steps: S1, connecting adjacent prefabricated components (1); S2, inserting the pre-embedded steel bars on the prefabricated components (1) into the pre-embedded grouting sleeves (2) in the adjacent prefabricated components (1); S3, mixing and stirring cement grouting materials in a certain proportion, and injecting the stirred cement grouting materials into the grouting sleeves (2) through grouting holes (21); S4, collecting air discharged from the air outlet holes (22) and detecting the air pressure, and automatically measuring the grouting saturation degree by converting the air pressure, and stopping the grouting and keeping pressure automatically when the grouting saturation degree reaches a preset value. In S4, the saturation degree measuring device (3) is used to collect the air discharged from the air outlet holes (22) and detect the air pressure, so as to know the grouting saturation degree. The saturation degree measuring device (3) comprises: A grouting device (31) is provided with a grouting hose (32) connected with the grouting holes (21), an air inlet hose (33) connected with the air outlet holes (22), and a gas collecting chamber (34) connected with the air inlet hose (33); A pressure sensor (343) is arranged in the gas collecting chamber (34) and used for detecting the air pressure in the gas collecting chamber (34) and sending a pressure detection signal; An air outlet pipeline (341) is arranged in the gas collecting chamber (34), and an air outlet valve (342) is further arranged on the air outlet pipeline (341); A pressure display module (344) is connected with the pressure sensor (343) and used for receiving the pressure detection signal and displaying the air pressure in the gas collecting chamber (34); A digital control sensing device (345) is connected with the pressure display control module and the grouting device (31) and used for receiving the pressure detection signal to know the air pressure in the gas collecting chamber (34), and sending a control signal to the grouting device (31) to stop the grouting when the air pressure in the gas collecting chamber (34) reaches a preset air pressure value; The saturation degree measuring device (3) further comprises two anti-grouting filter screens (35) arranged at the connection positions of the grouting hose (32) and the grouting holes (21) and the air inlet hose (33) and the air outlet holes (22) respectively. The saturation degree measuring device (3) further comprises: A collecting cylinder (37) is arranged on one side of the air inlet hose (33) close to the air outlet holes (22); A sealing end cover (371) is detachably connected to the bottom of the collecting cylinder (37); A backwashing pipe (38) is arranged on the air inlet hose (33), and the collecting cylinder (37) is located between the backwashing pipe (38) and the air outlet holes (22); A water inlet valve (381) is arranged on the backwashing pipe (38); 2. The method of claim 1, wherein, An air inlet valve (331) is arranged on the air inlet hose (33), and the air inlet valve (331) is located between the backwashing pipe (38) and the gas collecting chamber (34).

3. The method of claim 1, wherein the method further comprises: A barrier filter screen (36) is arranged at the connection position of the air inlet hose (33) and the gas collecting chamber (34).

4. The method according to any one of claims 1-3, wherein the method is a method for determining the fullness of a fabricated sleeve grout, characterized in that, The air inlet hose (33) is made of transparent material. In S3, before grouting, an air compressor is used to check the grouting holes (21) and the air outlet holes (22) to ensure that the holes are unobstructed.

5. The method of claim 1-3, wherein, In S3, the cement grouting slurry should complete the grouting operation within 20-30 minutes from the beginning of the water agitation.

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