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2. Adhesion strength
The adhesion is traditionally defined as the strength
of an interface between two materials, for instance between
rock and shotcrete. However, in many cases the
location of the failure surface will vary depending on
the strength of the contact zone, the tensile strength of
the rock and the tensile strength of shotcrete layer. A
field study by Karlsson (1980) showed that only in
32% of the 238 tests the whole failure was located in
the contact area, see Fig. 2. The rock types were mainly
gneiss (227 tests) and in a few cases (11 tests) granite.
The adhesion strength mainly depends on treatment
(cleaning), roughness of the rock surface, mineral composition
of the rock and shotcreting technique. The
shotcrete technique includes the skill of the operator
which is of great importance. After mechanical scaling,
the rock surface has to be cleaned in order to achieve adhesion
strength betw
The adhesion is traditionally defined as the strength
of an interface between two materials, for instance between
rock and shotcrete. However, in many cases the
location of the failure surface will vary depending on
the strength of the contact zone, the tensile strength of
the rock and the tensile strength of shotcrete layer. A
field study by Karlsson (1980) showed that only in
32% of the 238 tests the whole failure was located in
the contact area, see Fig. 2. The rock types were mainly
gneiss (227 tests) and in a few cases (11 tests) granite.
The adhesion strength mainly depends on treatment
(cleaning), roughness of the rock surface, mineral composition
of the rock and shotcreting technique. The
shotcrete technique includes the skill of the operator
which is of great importance. After mechanical scaling,
the rock surface has to be cleaned in order to achieve adhesion
strength betw
2 。粘接强度
粘附是传统定义为力量
对两种材料之间的相互关系，例如之间
岩石和混凝土。然而，在许多情况下，
位置破裂面将取决于
强度的接触带，拉伸强度
岩石和拉伸强度喷层。字母a
实地研究的卡尔森（ 1980年）表明，只有在
32 ％的238测试整个失败位于
接触面积，见图。 2 。岩石类型主要
片麻岩（ 227测试）和在少数情况下（ 11测试）花岗岩。
结合强度主要取决于治疗
（清洁） ，粗糙的岩石表面，矿物组成
岩石喷技术。那个
喷射混凝土技术包括技术的运营商
这是非常重要的。机械缩放，
岩石的表面，要清除，以实现粘附
实力之间的岩石和混凝土。
在过去十年中的一种方法，这是一种替代品
机械结垢和随后的水
干洗，称为水射流尺度，已经过测试，以便
评估的潜力，提供方法
改善粘连。水射流缩放是考验
一种治疗方法在隧道工程Hallandsas
在瑞典（伦德马克和尼尔森， 1999年） 。结果
结果表明，水射流尺度了更高的黏附
（一） （二） （三）
图。 1 。促进联锁块，修改后斯泰西（ 2001年） 。 （一）剪切和正常应力喷
岩石界面。 （二）在表面张力
支持和正常应力喷岩界面。 （三）渗透喷到关节和裂缝。
34属马尔姆格伦等。 /隧道和地下空间技术20 （ 2005 ） 33-48段
强度比机械尺度和清洁。但是，
分散的粘接强度非常大，它
很难从统计分析得出结论
是否粘接强度明显高于
或没有。在项目进行科罗拉多学院
地雷（ Kuchta ， 2002年） ，粘接强度的混凝土
墙高4倍时，清理了
水压力21兆帕比较清洁的
水压力0.7兆帕。
2 。粘接强度
粘附是传统定义为力量
对两种材料之间的相互关系，例如之间
岩石和混凝土。然而，在许多