A kind of construction method of CFG pile
A construction method and technology of construction steps, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as long construction period, and achieve the effects of saving construction period, prolonging service life and shortening construction period
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0056] A construction method of a CFG pile includes the following construction steps.
[0057] Step 1. Leveling the site: clearing the soil and obstacles on the surface;
[0058] Step 2, measuring and setting out: release the specific position of each pile according to the coordinates and mark it;
[0059] Step 3, the pile driver is in place: make the drill pipe 22 of the long auger rig 2 vertically aligned with the center of the pile position, control the drilling, and measure the verticality of the hole by hanging a vertical ball on the drill stand, or use the rig to automatically Equipped with a verticality adjuster to ensure that the verticality deviation of the drill pipe meets the process requirements;
[0060] Step 4, drilling:
[0061] Such as figure 2 As shown, before drilling, make a stop pump mark 6 and a drilling completion mark 7 on the stand 21, and first lead the motor top surface 24 horizontally to the stand 21 to make a reference mark 5; a distance below t...
Embodiment 2
[0073] The difference from the first embodiment is that the observation hole 9 is set on the drill pipe 22 to control the time to stop the pumping material, so that the length of the overfilling pile head is uniformly s. Observation hole 9 is offered in the middle of two layers of helical blades 26 near the position of upper helical blades (refer to Figure 10 ).
[0074] Proceed as follows:
[0075] Before drilling in step 4, calculate h, the opening of the rod wall: as Figure 8 Shown, calculate the height h of the required concrete in the drill pipe 22 for the super-filling pile head, and offer the observation hole 9 that can flow out the concrete slurry on the drill pipe side wall above the drill pipe bottom 23 h position. The calculation formula is as follows: h=(s+n)*R 2 / r 2 , where s is the length of the overfill pile head, and 0.5m≤s≤1.2m, the specific value of s is determined before drilling; n is any number ≥ 0, and the value of n can satisfy h≥ ground elevation...
Embodiment 3
[0083] The difference from the second embodiment is that, as Figure 11 As shown, if the calculated hH, and it does not need to be too large. Preferably n can be equal to 1 or 2. Now take n=1 as an example for illustration:
[0084] Assuming H=8m, s=1m, the radius R of hole pile 4 is 0.2m, and the inner diameter r of the drill pipe is 0.08m, the calculated h=(1+1)*0.2 2 / 0.08 2 =12.5m, h(12.5m)>H(8m), according to h=12.5m, the observation hole 9 is set on the drill pipe 22, then the observation hole 9 can leak 4.5m from the ground, and the workers can observe that the concrete flows out of the hole.
[0085] At the same time, because c=original ground elevation 11-design pile top elevation 13+n, so the position of suspension pole pulling mark 8 should be lowered by n=1 meter.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More