초록 ▼

The invention relates to a grout injection device and method for depositing a liquid grouting material in a hole formed by a cone penetrometer. The device is a modular design with a sliding sleeve member that replaces older grouting injection devices with exit port opening actuated by fluidic pressu

The invention relates to a grout injection device and method for depositing a liquid grouting material in a hole formed by a cone penetrometer. The device is a modular design with a sliding sleeve member that replaces older grouting injection devices with exit port opening actuated by fluidic pressures with an improved more reliable mechanical design that is actuated by withdrawal of the cone penetrometer pipe string by friction between the sliding sleeve and the soil wall formed by the cone penetrometer. The invention solves the problem of pressure losses that can occur with prior art devices resulting in partially opened grout exit ports. The instant invention's design also achieves proper channeling of the grout flowing out of the device's grout exit ports for even distribution of grout filling the hole. This is achieved by the invention's boss structures mounted on an adapter unit of the device. The inventions method allows the cone penetrometer system to perform subsurface surveys and subsequent grouting events in a single penetrometer push event without the need for first retrieving the survey instrumentation and then going back into the hole with a stand-alone grouting device.

대표청구항 ▼

[ We claim:] [4.] A method for sealing ground holes to substantially prevent underground migration of fluid along the hole for a predetermined underground activity during a cone penetrometer system operation, the method comprising:forming a pipe string of the cone penetrometer system;pushing the pip

[ We claim:] [4.] A method for sealing ground holes to substantially prevent underground migration of fluid along the hole for a predetermined underground activity during a cone penetrometer system operation, the method comprising:forming a pipe string of the cone penetrometer system;pushing the pipe string into the ground, the pipe string including an integral grouting module means for performing a subsurface grout operation during a pipe string withdrawal, said grout module means including a central tubular member fixedly connected to the pipe string at its upper end and having grout exit ports therein and a sliding sleeve movable between a closed position covering the ports and an open position uncovering the ports, the pushing of the cone penetrometer system forms the hole;performing the predetermined activity prior to withdrawal of the pipe string;withdrawing the pipe string from the hole thereby moving the sliding sleeve relative to the central tubular member to open said grout exit ports disposed on the grouting module means and delivering liquid grout material into the hole through said grout exit ports.