Unlock instant, AI-driven research and patent intelligence for your innovation.
A self-monitoring method for grouting fullness of steel bar sleeve connection
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A steel sleeve and fullness technology, which is applied in the field of self-monitoring of sleeve grouting fullness for the connection of fabricated steel-concrete structures, to achieve high working performance
Active Publication Date: 2022-07-29
HARBIN INST OF TECH
View PDF7 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] In order to overcome the shortcomings of the existing monitoring technology for the fullness of steel sleeve grouting, the present invention provides a self-monitoring method for the fullness of grouting steel sleeve connection
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0065] Taking the GTZB4-12 / 12 grouting sleeve produced by Shenyang Polytech Company as an example, the grouting quality during the grouting process of this sleeve model is monitored in real time by the self-monitoring method of grouting fullness provided by the present invention. Among them, the initial resistivity of the intelligent grouting material used is 1.92Ω·m.
[0066] Step S1: First adopt the theoretical method, by changing d 1 , the sensitivity values for sensing end defects and middle defects are obtained, as shown in Table 1. where the ability to sense end defects increases with d 1 decreases with increasing value; in contrast, the ability to perceive central defects increases with d 1 increases as the value increases. The d corresponding to the intersection of the two curves 1 The value is taken as the optimal theoretical embedding depth of the reinforcement at the insertion end, and the value is about 0.008m. Considering the convenience and accuracy of con...
Embodiment 2
[0080] In this embodiment, the intelligent grouting material includes the following components: P.II52.5R Portland cement, 1.0; quartz sand, 1.0; functional filler, 0.011; fly ash, 0.12; silica fume, 0.12; admixture, 0.06745 ; water, 0.26, where:
[0081] The quartz sand is prepared by mixing the following raw materials according to gradation and weight ratio: 20-40 mesh, 0.5; 40-70 mesh, 0.5;
[0082] The functional filler is prepared by mixing the following raw materials according to the weight ratio: 2mm chopped carbon fiber, 0.1; 200μm carbon fiber powder, 1.0;
[0083] The admixture is prepared by mixing the following raw materials according to the weight ratio: HCSA expansion agent, 6.0; plastic expansion agent, 0.025; polycarboxylate superplasticizer, 0.6; defoaming agent, 0.12.
Embodiment 3
[0085] In this embodiment, the intelligent grouting material includes the following components: P.II52.5R Portland cement, 1.0; quartz sand, 1.2; functional filler, 0.01125; fly ash, 0.123; silica fume, 0.077; admixture, 0.06745 ; water, 0.26, where:
[0086] The quartz sand is prepared by mixing the following raw materials according to gradation and weight ratio: 20-40 mesh, 0.72; 40-70 mesh, 0.48;
[0087] The functional filler is prepared by mixing the following raw materials according to the weight ratio: 2mm chopped carbon fiber, 0.125; 200μm carbon fiber powder, 1.0;
[0088] The admixture is prepared by mixing the following raw materials according to the weight ratio: HCSA expansion agent, 6.0; plastic expansion agent, 0.025; polycarboxylate superplasticizer, 0.6; defoaming agent, 0.12.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
length
aaaaa
aaaaa
length
aaaaa
aaaaa
Login to View More
Abstract
The invention discloses a self-monitoring method for grouting fullness of a steel bar sleeve connection. The method comprises the following steps: Step S1: determine the optimal theoretical embedding depth of the steel bar at the insertion end of a steel bar sleeve of a certain type; Step S2: determine the steel bar sleeve Step S3: Determine the standard range of the real part value of the AC impedance of the steel bar sleeve of this type when the grouting is full; Step S4: Connect the wires of the positive and negative electrodes of the measuring device to the grouting sleeve respectively. The steel bars at the ends are connected; step S5: start grouting in the grouting sleeve, when the grouting material flows out from the grouting outlet, block the grouting outlet with a rubber plug, continue grouting for a while and then stop grouting; step S6: read the grouting in real time The value of the plumpness perception signal, compare it with the standard range of grouting plumpness, and get whether the sleeve grouting is plump. The invention solves the problem that it is difficult to monitor the grouting fullness of the steel bar sleeve inside the concrete structure during the construction process.
Description
technical field [0001] The invention belongs to the technical field of building quality detection, and relates to a self-monitoring method for the fullness of sleeve grouting for connection of assembled steel-concrete structures. Background technique [0002] Compared with traditional construction methods, promoting the process of building industrialization has many advantages such as protecting the environment, saving resources, and shortening the construction period. However, during long-term service, the durability of prefabricated structures has always been a concern. Among them, the connection between prefabricated steel-concrete components is crucial to the integrity and safety of the structure, and directly affects the working performance of the building during service. At present, the connection methods between prefabricated components are mainly divided into grouting sleeve connection, field welding, concrete post-cast connection, steel mechanical connection, and b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More