A pair of retaining members each comprise a paddle-shaped end portion and a retaining portion between which a wall panel is retained. The panel-shaped end portion has at least one channel and exit ports through which a fluid is capable of being injected in order to fluidize the soil beneath the retaining members, causing the panel-shaped end portion to sink into the soil and consolidating the soil surrounding the panel-shaped end portion. The shape and soil consolidation work to fix the panel in position, sometimes without the need for soil grouting or other soil consolidation processes that would be required, otherwise.

The present invention provides a method for tackling the repelling of hammering during pipe pile driving. The technical scheme of the present invention includes: when repelling of hammering occurs in the process of piling through a sand layer, drill holes downwardly around and/or inside the pipe pile, and jet high-pressure water to the sand layer below to cut and disturb the sand layer.

The present invention provides a method for tackling the repelling of hammering during pipe pile driving. The technical scheme of the present invention includes: when repelling of hammering occurs in the process of piling through a sand layer, drill holes downwardly around and/or inside the pipe pile, and jet high-pressure water to the sand layer below to cut and disturb the sand layer.

Disclosed are a discharge jet and a pile-plank applying the same. The discharge jet may include a discharge jet body; the body is connected with a water inlet pipe; the shape of the body is basically the same as the pile-plank; a diameter of the discharge jet is in the range of 50 mm-500 mm; water jet holes are formed in the body; the diameter of each water jet holes is in the range of 1.5 mm-15 mm; each space between adjacent water jet holes is in the range of 8 mm-80 mm; and the maximum included angle formed by the water jet holes is in the range of 30-180. The discharge jet and a method for driving the pile-plank into the earth by the discharge jet have the advantages of wide application range, high construction efficiency and low cost.

Disclosed are a discharge jet and a pile-plank applying the same. The discharge jet may include a discharge jet body; the body is connected with a water inlet pipe; the shape of the body is basically the same as the pile-plank; a diameter of the discharge jet is in the range of 50 mm-500 mm; water jet holes are formed in the body; the diameter of each water jet holes is in the range of 1.5 mm-15 mm; each space between adjacent water jet holes is in the range of 8 mm-80 mm; and the maximum included angle formed by the water jet holes is in the range of 30-180. The discharge jet and a method for driving the pile-plank into the earth by the discharge jet have the advantages of wide application range, high construction efficiency and low cost.

A pile (100) includes a first elongated hollow body (101) having a first end and a second end, the first end being closed by an end member (103) provided with an opening (104). The pile (100) includes a second elongated hollow body (102) having a first end and a second end, the second elongated hollow body (102) being arranged inside the first elongated hollow body (101) so that the first end of the second elongated hollow body (102) extends through the opening (104) and is attached to the end member (103). A method is for installing a pile (100) into the ground.

A pile (100) includes a first elongated hollow body (101) having a first end and a second end, the first end being closed by an end member (103) provided with an opening (104). The pile (100) includes a second elongated hollow body (102) having a first end and a second end, the second elongated hollow body (102) being arranged inside the first elongated hollow body (101) so that the first end of the second elongated hollow body (102) extends through the opening (104) and is attached to the end member (103). A method is for installing a pile (100) into the ground.

Apparatuses for constructing displacement aggregate piers are disclosed. In one example, a mandrel is provided comprising a tamper head that has cutting teeth on the leading edge thereof. In another example, hydrojet nozzles are provided within one or more of the cutting teeth of the tamper head. In yet another example, the mandrel comprises grout tubes (or grout injection lines) and/or grout inspection lines. In yet another example, the mandrel and/or tamper head can comprise cutting teeth, hydrojet nozzles, grout tubes (or grout injection lines), grout inspection lines, and any combinations thereof.

Apparatuses for constructing displacement aggregate piers are disclosed. In one example, a mandrel is provided comprising a tamper head that has cutting teeth on the leading edge thereof. In another example, hydrojet nozzles are provided within one or more of the cutting teeth of the tamper head. In yet another example, the mandrel comprises grout tubes (or grout injection lines) and/or grout inspection lines. In yet another example, the mandrel and/or tamper head can comprise cutting teeth, hydrojet nozzles, grout tubes (or grout injection lines), grout inspection lines, and any combinations thereof.

An underwater pile foundation comprises a pump in fluid communication with an internal chamber of the pile to pump water out of or into the chamber. This reduces or increases the pressure of water in the chamber relative to ambient pressure of water outside the chamber during installation or removal of the pile. While that pumping phase is ongoing, and potentially before or after that pumping phase, a pressure variator in fluid communication with the chamber imparts oscillations in the pressure of the water in the chamber. The resulting pressure waves in water within the chamber reduce resistance to movement of the pile relative to soil in which the pile is embedded.