Which master has the technical regulations and acceptance specifications for the construction of ant

We recommend this code to you, and we are based on this code for the construction and acceptance of anti-floating anchors.

Geotechnical bolt (cable) technical specification CECS22 2005 I also do a few anti-floating bolt engineering, I have the opportunity to contact.

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1. Pre-construction inspection.

Before construction, the benchmark should be basically inspected, and the geological conditions and surrounding environment of the construction should be strictly controlled. In the basic test, the test load should not exceed a multiple of the bearing capacity of the second pole itself.

2. Pay-off. In the pay-off process, it should be carried out according to the relevant content in the design drawings, marked with wooden piles and steel bars, and numbered on them. The hole position must be less than or equal to 50 mm.

3. Drilling. It is placed smoothly with a drill rig, so as to ensure that there is no obvious shaking when drilling. If there is significant shaking, it is likely to cause empty mass problems.

4. Adjust the verticality of the hanging line.

Adjust the verticality of the drill pipe with a hanging wire. In this process, it must be noted that the manager's signature is required before drilling. If the manager does not sign off on the confirmation, drilling is not allowed.

5. Cleaning after drilling.

After drilling, be sure to clean the hole before using the relevant pressure bar. When removing all the slag from the cave, the cleaning process should not be too long. If the cleaning time is too long, it is likely to cause unnecessary trouble.

6. Anchor construction.

When carrying out bolt construction, it is necessary to check whether there are cracks and blockages in the holes, and whether the interface is firm to prevent cracking due to the increase in pressure during the bolting process.

7. Grouting Pressure grouting of the bolts. The treated anchor needs to be accepted, and the sliding rod is completed only after the sliding rule is collected.

Anti-floating anchorsConstruction process:

1. Before construction, a basic test should be done for the sight rod, and strict control should be done for the geological conditions and the environment around the construction of the Tong scatter, and the test load should not exceed the bearing capacity of the second rod itself during the basic test.

2. Then, it is the two-rod positioning and pay-off.

In the process of pay-off, it is necessary to implement the relevant content in the design drawings, use wooden piles and steel bars as marks, and number them, and the hole position of the benchmark must be less than or equal to 50 mm deviation.

3. Then use the drilling rig pad to ensure that there will be no obvious shaking when drilling, if there is obvious shaking, it is likely to cause empty quality problems.

4. Use a compass line or a hanging wire to adjust the verticality of the drill pipe.

In the process of this step, it must be noted that the management personnel need to sign before drilling, if the management personnel do not sign to confirm that they can not drill.

5. After watching the drill, you must use mud to clean the holes, and then use the pressure rod related to the chain laugh. All the slag in the hole is sober and clean. The cleaning process should not be too long, and if the cleaning time is too long, it is likely to result. His horrific phenomena occurred.

6. Then it is necessary to aim at the rod construction, and when aiming at the rod, it is necessary to check whether the hole is cracked and blocked, whether the interface is firm, so as to prevent the pressure in the process of seedlings and seedlings, which will lead to cracking of the oral cavity when it increases.

7. Finally, pressure grouting treatment is required, and after the treatment, it is also necessary to accept the sight rod, and it will be completed after the acceptance is qualified.

Operational points

1) The geological conditions, bolt materials and construction technology of the basic test of the bolt should be consistent with the engineering bolt.

2) The maximum test load shed wheel content during the basic test should not exceed the times of the standard value of the bearing capacity of the bolt rod body.

3) The main purpose of the basic test is to determine the characteristic value of the bond strength between the anchor solid and the rock and soil layer.

Bolt design parameters and construction technology. The number of bolts for each test should not be less than 3.

4) The basic test of the bolt should adopt the cyclic addition and unloading method.

5) The following conditions are regarded as failure and loading is terminated: the displacement of the anchor head does not converge, the anchor solid is pulled out of the rock and soil layer or the anchor rod is pulled out of the anchor solid; The total displacement of the anchor head exceeds the allowable value of the design; The displacement increment caused by the first-level load is more than 2 times the displacement increment of the first-level load.

6) Draw load-displacement curves, load-elastic displacement curves and load-plastic displacement curves.

Summary. Hello! I'll answer this question for you. Anti-floating anchor construction technology: 1. Construction process: anchor hole positioning number, drilling rig in place, drilling, lower steel anchor, primary grouting, lower stones, pipe pulling, secondary grouting and anchor sealing completed.

Hello! I'll answer this question for you. Anti-floating anchor state bending construction technology: 1. Construction process: anchor hole sailing stuffy number, drilling rig in place, drilling, lower steel anchor, primary grouting under the stone, pipe pulling, seepage letter secondary grouting anchor sealing completed.

2. The construction worker and the sail art "1" pay-off and setting the auspicious position according to the construction pile position plan layout to determine the pile position, and do a good job of marking and pre-calling the stupid hail inspection. The pile position error control is within the standard requirements.

2》Anchor hole drilling method Install Huicong anchor hole drilling rig, level, adjust, stabilize The anchor hole diameter is 150mm, the hole diameter deviation is not more than 2cm, and the forelimb cherry tree of the drilling depth deviation should not be less than 1% of the design depth of the shot, nor should it be greater than the design depth of 500mm, and the depth of the hole reaches the design requirements.

Anchor hole drilling often check the size of the drill bit Yuanxiao, to ensure that the diameter of the Pi Huai borehole to master the centerness of the anchor hole, to prevent the anchor hole from deflecting, after running the burning and cracking friends should be taken to re-form the hole.

3》Hole washing After the anchor is a hole, the drilling rig cleaning time is not less than 1 minute, to ensure that the mud in the hole is rolled and discharged, and the sediment is less than or equal to 30cm.

4》Bolt body processing and production and hole installation The anchor body is 1 28, and the length is determined according to the design plan

The above is the relevant information for your consultation, please check it carefully! Hope to be able to help you effectively! Have a great day! Thank you.

The information that needs to be prepared for the acceptance of anti-floating anchors are:

Commencement report. Construction organization design.

The qualification of the subcontractor is submitted for review.

The ratio of raw materials, mortar or concrete is submitted for review.

Anti-floating bolt reinforcement raw materials, processing, installation inspection batch 6Rebar concealment.

Record of anti-floating bolt construction.

The steel bar welding report is the total amount of rebar welding (including test welding).

A summary table of the report of the mortar or concrete test block, and the evaluation.

As-built drawings. What experiments should be done on anti-floating anchors:

Re-inspection of mortar or concrete raw materials.

If your anti-floating bolt rod body is made of steel bar, and the length is long, the connection will generally be connected with a straight thread joint or welding, at which point you also have to do a straight thread joint or welding test.

In the case of construction sites with complex strata, you may also need to add admixtures (such as rust inhibitors, preservatives, etc.) to the anchor solid material code.

The most important point before the construction of anti-floating anchors is to do basic tests.

According to page P95 of the "Code for the Design of Building Foundations", the number of bolts required to be inspected shall not be less than 3%, and shall not be less than 6.

The acceptance test requirements on page P81 of the Technical Code for Building Slope Engineering require that the number of anchor rods inspected shall not be less than 5% and shall not be less than 5.

Now that there are inconsistencies between the two norms in the country, which norm should be implemented? Should it be "the number of inspections shall not be less than 5%, and shall not be less than 6". In this way, both specifications are not violated, but the cost of the test increases!