A strut connector may include a connector base, a cover band, a cover band fixer for fixing the cover band to the connector base, and a connection jack. The connector base may include a base body; a support band protruding from one surface of the base body; a base reinforcement boss protruding from the one surface of the base body to a smaller height than the support band; a base connection boss protruding in the opposite direction of the protruding direction of the support band; a base through-hole formed through the base body, the base reinforcement boss and the base connection boss; and a base screw portion formed on the inside of the base through-hole. The cover band may be separably coupled to the connector base.

A strut connector may include a connector base, a cover band, a cover band fixer for fixing the cover band to the connector base, and a connection jack. The connector base may include a base body; a support band protruding from one surface of the base body; a base reinforcement boss protruding from the one surface of the base body to a smaller height than the support band; a base connection boss protruding in the opposite direction of the protruding direction of the support band; a base through-hole formed through the base body, the base reinforcement boss and the base connection boss; and a base screw portion formed on the inside of the base through-hole. The cover band may be separably coupled to the connector base.

A finishing assembly for a rail and post wall comprising: one or elongate capping members having longitudinal recesses for receiving a top of the wall and for installation therealong; and one or more post covers for installation over posts of the wall.

A self-sinking-type deep foundation pit retaining wall structure, comprising a cylindrical retaining wall body (1); a ground breaking structure (2) is formed at the bottom of the cylindrical retaining wall body (1), and the cylindrical retaining wall body (1) is suitable for achieving downward ground breaking and sinking by means of the cooperation of the ground breaking structure (2) and the gravity of the cylindrical retaining wall body; and a water pipe (20) running through the cylindrical retaining wall body is cast in the cylindrical retaining wall body (1), and the water pipe (20) is provided with a water outlet (80) located at the lower end face of the cylindrical retaining wall body (1) and a water inlet (81) located at the upper end face of the cylindrical retaining wall body (1). The self-sinking-type deep foundation pit retaining wall structure further comprises resistance increasing devices (4) provided on an outer side wall (3) of the cylindrical retaining wall body (1), and the resistance increasing devices (4) are used for cooperating with a foundation (5), so as to adjust upward resistance applied by the foundation (5) to the cylindrical retaining wall body (1). In addition, further provided is a construction method for an underground space.

A self-sinking-type deep foundation pit retaining wall structure, comprising a cylindrical retaining wall body (1); a ground breaking structure (2) is formed at the bottom of the cylindrical retaining wall body (1), and the cylindrical retaining wall body (1) is suitable for achieving downward ground breaking and sinking by means of the cooperation of the ground breaking structure (2) and the gravity of the cylindrical retaining wall body; and a water pipe (20) running through the cylindrical retaining wall body is cast in the cylindrical retaining wall body (1), and the water pipe (20) is provided with a water outlet (80) located at the lower end face of the cylindrical retaining wall body (1) and a water inlet (81) located at the upper end face of the cylindrical retaining wall body (1). The self-sinking-type deep foundation pit retaining wall structure further comprises resistance increasing devices (4) provided on an outer side wall (3) of the cylindrical retaining wall body (1), and the resistance increasing devices (4) are used for cooperating with a foundation (5), so as to adjust upward resistance applied by the foundation (5) to the cylindrical retaining wall body (1). In addition, further provided is a construction method for an underground space.

A structure for supporting a foundation pit based on a steel edge-arch structure, including: an enclosing purlin beam, the steel edge-arch structure, a plurality of support beams and a plurality of triangular supports. The support beams are located at an inner side of the enclosing purlin beam. The triangular supports are arranged on the enclosing purlin beam. End portions of the support beams are supported on the enclosing purlin beam through the triangular supports, and abutted on side edges of the triangular supports. The steel edge-arch structure is located between two adjacent triangular supports. The steel edge-arch structure includes two first haunched members and a bracing beam provided therebetween.

A structure for supporting a foundation pit based on a steel edge-arch structure, including: an enclosing purlin beam, the steel edge-arch structure, a plurality of support beams and a plurality of triangular supports. The support beams are located at an inner side of the enclosing purlin beam. The triangular supports are arranged on the enclosing purlin beam. End portions of the support beams are supported on the enclosing purlin beam through the triangular supports, and abutted on side edges of the triangular supports. The steel edge-arch structure is located between two adjacent triangular supports. The steel edge-arch structure includes two first haunched members and a bracing beam provided therebetween.

A haunched component-based steel support structure for a foundation pit, including an enclosing purlin beam, a support beam located on an inner side of the enclosing purlin beam, and a triangular support arranged on the enclosing purlin beam. A first edge of the triangular support is fixedly arranged on the enclosing purlin beam. An end of the support beam abuts against a second edge of the triangular support to be supported on the enclosing purlin beam, and a haunched component is arranged between the enclosing purlin beam and a third edge of the triangular support. A first side of the haunched component is connected to the third edge of the triangular support, and a second side of the haunched component is connected to the enclosing purlin beam.

A haunched component-based steel support structure for a foundation pit, including an enclosing purlin beam, a support beam located on an inner side of the enclosing purlin beam, and a triangular support arranged on the enclosing purlin beam. A first edge of the triangular support is fixedly arranged on the enclosing purlin beam. An end of the support beam abuts against a second edge of the triangular support to be supported on the enclosing purlin beam, and a haunched component is arranged between the enclosing purlin beam and a third edge of the triangular support. A first side of the haunched component is connected to the third edge of the triangular support, and a second side of the haunched component is connected to the enclosing purlin beam.

System and means soil stabilization and moisture control for building foundations including methods and systems for stabilization moisture in a site for building foundation by applying soil moisture stabilization material in various forms, a preferred stabilization material being a mixture of aluninosilicate Pozzolan mineral and granular material such as sand.