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     李豪邦
    （中國(guó)建筑東北設(shè)計(jì)研究院深圳分院 深圳 518030）

[提要]  本文提出的暗桁架其特點(diǎn)是在砌體結(jié)構(gòu)的基礎(chǔ)墻中利用基礎(chǔ)墻上下的鋼筋混凝土圈梁及基底板，將其縱筋連通；另在基礎(chǔ)墻內(nèi)適量設(shè)置小斷面構(gòu)造柱，其中距不大于基礎(chǔ)墻高的四倍；構(gòu)造柱上下端必須與圈梁及基底板連牢。這樣，砌體上下的圈梁、基底板及左右的構(gòu)造柱將構(gòu)成對(duì)其中砌體墻體的有效約束。在此情況下，新構(gòu)成的基礎(chǔ)對(duì)軟硬不一的地基反力將會(huì)起到暗桁架的有利效應(yīng)，同時(shí)亦有利于節(jié)約工程造價(jià)。
[關(guān)鍵詞]  砌體 基礎(chǔ)墻 圈梁 基底板 構(gòu)造柱 暗桁架

A new theory of hidden truss is put forth, which consists of R.C. ring beam on the top, foundational masonry wall at the middle, bottom R.C. slab of foundation and vertical structural columns in the wall connected with the ring beam and the bottom slab, with spacing not greater than 4 times the wall height. This kind of structure functions as a confined masonry which is specially suitable to the condition of soft and hard subsoil. It acts as the hidden truss undertaking the variable reactions caused by the uneven subsoil, so prevents the structure from uneven settement and cracking, and benefits a lot economically.
Keywords: masonry wall; ring beam; bottom slab; foundation; structural column; hidden truss