42results about How to "Reduce the number of piles" patented technology

The invention relates to a core-grouted static pressure anchor rod pile forming device, which comprises a standard pile section and a bottom pile section, wherein a hard plastic pipe is embedded in the center of the cross section of the standard pile section; the bottom end of the hard plastic pipe is connected with a straight-through hollow chamber, and the four corners of the top end thereof are respectively provided with an anchor rod hole; the four corners of the bottom end of the standard pile section are respectively provided with a connecting hole; the connecting holes correspond to the axial positions of the anchor rod holes; a bottom hard plastic pipe is embedded in the center of the cross section of the bottom pile section; the bottom end of the bottom hard plastic pipe is in threaded connection with a hard plastic casing pipe; the four corners of the top surface of the bottom pile section are respectively provide with a bottom anchor rod hole; the bottom anchor rod holes correspond to the axial positions of the anchor rod holes; reinforcing steel bars the upper parts of which are provided with nuts are anchored into the bottom anchor rod holes; the nuts and the connecting holes are configured; a plurality of lower outlet pipes are communicated in the circumferential direction of the hard plastic casing pipe; and a plurality of upper outlet pipes are communicated in the circumferential direction of the straight-through hollow chamber. The invention has the advantages that firstly, the value of the pile bearing capacity can be increased, and thereby, the number of piles can be decreased so as to reduce construction cost, and the quality is reliable; secondly, the influence of compaction soil on adjacent buildings can be reduced so as to protect the surrounding construction environment.

The invention relates to a high-speed railway wide and large embankment settlement control method adopting cement mixing piles. The reinforcing method comprises the following steps: a chemical improved soil layer is filled on the foundation of the reinforced high-speed railway embankment; pile point positions of cement mixing piles are designed on the chemical improvement soil layer, the depths of the cement mixing piles at all the pile point positions are designed according to the pile point positions of the cement mixing piles, the cement mixing piles are driven into all the pile point positions, a cushion layer is laid on the chemical improvement soil layer, and a foundation bed bottom layer and a foundation bed surface layer are sequentially filled on the cushion layer. Compared withthe prior art, chemical improved soil is used as embankment filler under a foundation bed layer; the cement mixing piles are used for reinforcing the chemically-improved soil layer, the depth and density of the cement mixing piles are reduced along with increase of the distance between the pile point positions and the reinforcing area under the main line, on the premise that the safety performanceof the embankment is guaranteed, the economic cost of the embankment is reduced, and the embankment settlement amount is prevented from exceeding the high-speed railway design specification requirement.

The invention discloses a method for constructing a long auger bored cast-with-pressure concrete uplift pile. The method for constructing the long auger bored cast-with-pressure concrete uplift pile comprises the steps that the preparation for construction is made, paying-off for positioning is conducted, a drilling machine is prepared to work, a hole is formed by the drilling machine, drill lifting and fine aggregate concrete pouring are conducted at the same time, the hole is sealed and grouting is conducted, a steel reinforcement cage is inserted, and drilling tools and an earthwork are cleaned. The method for constructing the long auger bored cast-with-pressure concrete uplift pile has the advantages that concrete is pressed in a soil body and is located on the bottom and the side wall of the pile according to the specific grouting technique, the concrete and the soil body are glued into a whole, and in this way, the contact area between a pile body and the soil body is increased; compared with a traditional uplift pile, the uplift performance of the long auger bored cast-with-pressure concrete uplift pile is improved remarkably.

A method for pouring concrete into pile hole and compressing and its vibrator are disclosed; including the following steps: (1) according to the work mode of concrete pile to choose the type of vibrator, use shape steel or steel pipe as the structural force-passing element; when there is mud staying in the upper part, use steel pipe; (2) pour concrete into the pile hole; (3) insert the vibrator into the concrete to vibrate and stress. The method suits for CFG pile dry work pouring pile method, wet work circulative pouring method and digging-drilling method etc.