Method and apparatus for molding underground diaphragms
This patent describes a method for molding underground contiguous plate-like diaphragms, particularly for shallow areas. It comprises: making a hole in the ground at a depth planned for one of the diaphragms. The hole defining a long narrow cylindrical cavity and the location of the hole selected to correspond to the middle of the diaphragm to be formed; successively inserting into the cavity of a head comprising at least two elements for ejection. The elements directed in substantially opposite directions and the axes of the two elements being substantially transverse to the axis of the cavity. The head being connected by means of a flexible one-piece tube to elements which supply a reinforcing and waterproofing substance under pressure to the ejection elements; determine the coordinates of the axes of the elements; sending through the ejection elements the reinforcement and waterproofing substance while pulling the head toward the top and maintaining the axes of the ejection elements oriented in a controlled manner in the plane perpendicular to the axis of the cavity; and repeating steps above to form other diaphragms, and after the first diaphragm has been formed, maintaining the ejection elements oriented so that the jet of the reinforcing and waterproofing substance reaches the vertical end edge of a previously formed and contiguous diaphragm.
- Assignee:
- Soil Jet Co. Inc., Duncan, OK
- Patent Number(s):
- US 4867240
- Application Number:
- PPN: US 7146765A
- OSTI ID:
- 5427222
- Resource Relation:
- Patent File Date: 22 Jan 1988
- Country of Publication:
- United States
- Language:
- English
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