How much does a hollow grouting bolt with a diameter of 25 3 weigh a meter?

Hollow grouting bolts are suitable for medium geological conditions, permanent support and advance support. The pressure grouting of the anchor rod through the hollow rod body can achieve the purpose of consolidating and breaking the rock mass, isolating the groundwater and anti-corrosion of the rod body, and can quickly form a supporting force to control the stability of the surrounding rock. Hollow grouting bolts are suitable for railways, highways, tunnels, mines, water conservancy hubs, slopes, embankments, bridge foundations, rivers, seas, lakes, and high-rise buildings.

Foundation and building reinforcement works. Bolt Specifications R25N R32L R32N R32S R38N R51L R51N T76N T76S Outer Diameter D(mm) 25 32 32 32 38 51 51 76 76 Inner Diameter D(mm) 14 15 19 36 33 51 45 Diameter D1(mm) 70 70 Cross-sectional area (mm2) 244 304 396 488 717 776 939 1835 2400 Tensile strength (kn) 200 210 280 360 500 550 800 1600 1900 Yield force (kn) 150 160 230 280 400 450 630 1200 1500 Average tensile strength.

rm(n mm2) 805 690 720 740 700 690 840 880 790 Average yield strength.

660 526 560 570 540 580 670 660 630 Weight (kg m) 6 7 15 Thread (left-handed) ISO10208 ISO1720 enterprise standard.

Steel grade according to GB T8162-2008 and EN 10083-1 Maximum penetration depth (m) 12 16 16 20 24 26 30 36 36

The weight per meter according to the budget is.

6mm。"Hollow grouting bolt" is a kind of hollow anchor, mostly used in relatively stable and complete rock formations, resin, engineering glue, quick-setting cement and other anchoring agents are injected from the center of the anchor, which is better than the anchorage quality of ordinary anchors. Due to the emergence of self-propelled hollow grouting bolts, hollow grouting bolts can also be used in formations under loose geotechnical conditions.

The anchor body of the hollow bolt adopts a hollow design, and the middle hole of the rod body is used as a high-pressure feng shui channel and grouting channel for drilling, and the hollow rod body design can obtain better stiffness and shear strength than the solid rod body. The full-length standard large-pitch thread structure on the outer surface of the bolt body is convenient for the cutting and lengthening of the bolt, and the bonding area between the bolt body and the grouting material is increased compared with the smooth rod body, thereby improving the anchoring force.

1. It is easy to install and ensure that the prestress application can be carried out in time.

2. Active tensioning, prestress up to 50kN, and appropriate overtension can be realized.

3. Using conventional tools, a single person can realize tensioning operation.

4. High-pressure grouting can be realized through the hollow rod body to improve the surrounding rock.

5. Control the whole process from production to installation to ensure quality.

According to the requirements of the thickness of the protective layer required by the anchor, it is 6mm, so 25+12, and the general supporting drill bit is 42.

The cement required for grouting per meter of 150 anchor rods is about 60 kilograms, because the diameter of the anchor hole of 150 has reached 15 cm, and he needs about 60 kilograms of cement per meter of length, because the cement should be mixed into a slurry with the corresponding water or an external source stupid agent to hang in this anchor hole, and sometimes a superspectral phenomenon will be formed to accompany the hail sail, so the length of each meter needs 60 kilograms of cement. I think it's useful, give it a thumbs up.

Hello dear! The answer is Ming Chi or: the grouting amount of the 3m25 hollow grouting anchor is a branch.

Detailed description: 3M25 hollow grouting bolt is a special bolt, and its injection wheel grout amount is a branch, that is, the concrete that needs to be injected into each bolt. Discuss:

The 3M25 hollow grouting bolt has a larger grouting capacity, so it has higher stability and can meet more engineering needs. Supplementary note: The grouting amount of 3M25 hollow grouting anchor is specified in accordance with the national standard, so the grouting should be carried out in strict accordance with the specified grouting amount during installation.

Blessings: I wish you a smooth journey and a successful completion of the project!

Summary. Dear, hello, I am glad to answer for you, how long is each hollow grouting anchor on the 25th A1, the length of the grouting anchor, according to the spacing plum blossom arrangement, 25 per ring; 2. The grouting slurry adopts cement-sodium silicate double liquid grouting, the concentration of water glass is 350BE, the parameter of retarder (Na2HPO4) is 2%, and the concentration of cement slurry: 1:

1。The volume ratio of cement slurry to water glass is 1:1 1:.

Dear, hello, very Ye Jane is happy to explain the song for you to take the pants answer, No. 25 hollow grouting anchor how long is each answer 1, the length of the grouting anchor, according to the spacing plum blossom layout, 25 per ring; 2. The grouting slurry adopts cement-sodium silicate double liquid grouting, with a water glass concentration of 350BE, a retarder (Na2HPO4) parameter of 2%, and a cement slurry concentration of 1:1.

The volume ratio of cement slurry to water glass is 1:1 1:.

The anchorage length of the anchor rod refers to the effective length of the part of the anchor rod that plays the role of anchor in the rock. Generally, it is determined by the thickness of the supported body. When the surrounding rock is layered, the anchorage length includes the total length through the loose layer and a portion deep into the solid rock formation; The non-layered surrounding rock is determined according to the range of the loosening zone of the surrounding rock.

When the design of bolt parameters is upgraded, it is necessary to measure the axial force distribution of the bolt and further verify it, and consider the anchoring purpose, the shape of the chamber section and the surrounding rock conditions. According to the statistics of the medium and ultra-deep foundation pits that have been partially completed in recent years, the length of the anchorage section of the soil prestressed anchor is mostly 14 20mm, and the upper limit of the anchorage length is more than 18 20mmI hope I can help you.

Summary. According to the inscription column, it is calculated as follows:

Cubic metre. Cubic meters of cement slurry are required.

The bolt aperture is 110mm, the length is 6m, and the grouting is 30kg per meter.

According to the inscription, the calculation is as follows: cubic meters of spring stimulation need to use cubic meters of water to cultivate socks in the mud.

This is calculated according to the formula for calculating the volume of the cylinder, the volume of the cylinder = the area of the circle * the height.