A method is used for strutting brace legs in a quadrangular setup of a rim of brace legs. The method consists in that a spreader (3) is attached to one end of each brace leg (2), while an extendable tensioning unit (4) is attached to the other end of the same brace leg (2). Next, the brace legs (2) are set inside the excavation in such a manner that, in the excavation corners, the ends of the brace legs (2) terminated with spreaders (3) become coupled with the ends of the subsequent brace legs (2) terminated with tensioning units. Once all the brace legs (2) have been coupled with each other, the ends of the brace legs (2), with the spreaders (3) attached to them, are pressed against the sheet piles (1) in the excavation corners by means of tensioning units (4) attached to subsequent brace legs (2). In the setup according to the invention, the spreader (3) is attached to one end of each brace leg (2) forming a rim of brace legs supporting the excavation sheet piles (1), while the tensioning unit (4) is attached to the other end of the same brace leg (2). The tensioning unit (4) comprises an l-section (41) to which an axially arranged lug (42) is mounted at one end, and a retaining block (43) is rigidly mounted on the opposite side. Between the axially arranged lug (42) and the retaining block (43), there is a sliding panel (5) composed of a base plate (51), protruding beyond the l-section (41) outline, spacing plates (52) and limiting plates (53), which altogether embrace the l-section (41) flanges. Welded to the base plate (51), there is a transverse retaining element (55) and two lateral lugs (57). There is also a block hole (44) and a tensioning hole (56), both penetrated by a tensioning stud (7). In each corner of the rim of brace legs (2), the spreader (3) attached to the brace leg (2) of the first pair of brace legs is coupled with the tensioning unit (4) of the brace leg (2) comprising the second pair of brace legs by means of pins (8).

本方法用于以支腿边缘的四边形设置来支撑支腿。该方法包括：在每个支腿(2)的一端附接吊具(3)，而在相同支腿(2)的另一端附接可伸缩张紧单元(4)。接下来，支腿(2)以这样的方式设置在挖掘部内部，即，使得在挖掘部拐角中，与吊具(3)端接的支腿(2)的端部变成和与张紧单元端接的随后的支腿(2)的端部耦接。一旦所有支腿(2)已经彼此耦接，支腿(2)的端部连同附接在其上的吊具(3)借助于附接在随后的支腿(2)上的张紧单元(4)被压靠在挖掘部拐角中的板桩(1)上。在根据本发明的设置中，吊具(3)附接在每个支腿(2)的一端，形成支撑挖掘板桩(1)的支腿边缘，而张紧单元(4)附接在相同支腿(2)的另一端。张紧单元(4)包括I型部分(41)，轴向布置的凸耳(42)安装在I型部分的一端，并且保持块(43)刚性安装在相对侧。在轴向布置的凸耳(42)和保持块(43)之间，有滑动板(5)，该滑动板由突出于I型部分(41)轮廓之外的基板(51)、间隔板(52)和限制板(53)组成，它们共同包围I型部分(41)的凸缘。横向保持元件(55)和两个横向凸耳(57)焊接到基板(51)上。还有挡孔(44)和张紧孔(56)，这两个孔都被张紧螺柱(7)穿透。在支腿(2)边缘的每个拐角中，附接到第一对支腿中的支腿(2)上的吊具(3)借助于销(8)与包括第二对支腿中的支腿(2)的张紧单元(4)耦接。