A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A catch basin trap for attachment to an opening in a side wall of a catch basin. The catch basin trap has a body with a front side for facing outside the catch basin, and a back for side facing inside the catch basin. The body defines a chamber, an inlet opening in the back side, and an outlet opening in the front side. A collapsible outlet pipe connector is attached to the outlet opening, configured to be manipulated from a collapsed configuration to an extended configuration defining a discharge end for coupling to an outlet pipe positioned outside the catch basin. The collapsed configuration stows the collapsible outlet pipe connector within the body, and the extended configuration permits watertight coupling of the discharge end to the outlet pipe. A method of installing a catch basin trap, and a method of making a concrete catch basin are also disclosed.

A flexible seal system for provision of a substantially watertight seal between adjacent concrete panels; said system comprising a first flexible seal member proximate a first end of one said concrete panel; said first flexible seal member including a surface component extending over a portion of an outer surface of said concrete panel; said surface component extending from at least one anchor component projecting from said surface component and embedded within said concrete panel; said first flexible seal member further including an overlap component extending from said surface component beyond said first end of said concrete panel; and
a second flexible seal member proximate a second opposite end of an abutting said concrete panel; said second flexible seal member including a surface component extending over a portion of a surface of said abutting concrete panel; said surface component of said second flexible seal member extending from at least one anchor component projecting from said surface component and embedded within said abutting concrete panel; and
wherein the overlap component of the first flexible seal member is structured and selected in use to overlap the surface component of the second flexible seal member sufficient to permit welding of at least a portion of said overlap component of said first flexible seal member to at least a portion of said surface component of said second flexible seal member so as to form a continuous welded seal between and along the length of said first flexible seal member and said second flexible seal member.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A flexible seal system for provision of a substantially watertight seal between adjacent concrete panels; said system comprising

a first flexible seal member proximate a first end of one said concrete panel; said first flexible seal member including a surface component extending over a portion of an outer surface of said concrete panel; said surface component extending from at least one anchor component projecting from said surface component and embedded within said concrete panel; said first flexible seal member further including an overlap component extending from said surface component beyond said first end of said concrete panel; and
a second flexible seal member proximate a second opposite end of an abutting said concrete panel; said second flexible seal member including a surface component extending over a portion of a surface of said abutting concrete panel; said surface component of said second flexible seal member extending from at least one anchor component projecting from said surface component and embedded within said abutting concrete panel; and
wherein the overlap component of the first flexible seal member is structured and selected in use to overlap the surface component of the second flexible seal member sufficient to permit welding of at least a portion of said overlap component of said first flexible seal member to at least a portion of said surface component of said second flexible seal member so as to form a continuous welded seal between and along the length of said first flexible seal member and said second flexible seal member.

Method for producing a construction element, in particular a tunnel element, from a curing material, such as concrete, in a mold, said construction element being provided with a watertight seal on at least one side thereof, wherein a gasket is used comprising a deforming body which is produced from a yielding material, such as rubber. According to the invention a base is produced from a relatively strong material, which base may or may not be detachable from the deforming body. Said base with or without said deforming body is placed against an inner side of the mold, said curing material is cast in the mold, and said curing material is cured to form said construction element with said watertight seal.

A flexible seal system for provision of a substantially watertight seal between adjacent concrete panels; said system comprising a first flexible seal member proximate a first end of one said concrete panel; said first flexible seal member including a surface component extending over a portion of an outer surface of said concrete panel; said surface component extending from at least one anchor component projecting from said surface component and embedded within said concrete panel; said first flexible seal member further including an overlap component extending from said surface component beyond said first end of said concrete panel; and a second flexible seal member proximate a second opposite end of an abutting said concrete panel; said second flexible seal member including a surface component extending over a portion of a surface of said abutting concrete panel; said surface component of said second flexible seal member extending from at least one anchor component projecting from said surface component and embedded within said abutting concrete panel; and wherein the overlap component of the first flexible seal member is structured and selected in use to overlap the surface component of the second flexible seal member sufficient to permit welding of at least a portion of said overlap component of said first flexible seal member to at least a portion of said surface component of said second flexible seal member so as to form a continuous welded seal between and along the length of said first flexible seal member and said second flexible seal member.

A method for moulding a part, including the following steps: placing at least one pre-stressing device in a first element; placing the first element facing a second element; pre-stressing the at least one pre-stressing device; introducing ultra-high performance fibre concrete into the reception volume; controlling gradual modification of one of the elements; and removing the tubular element from the mould.