General Specification for Civil Engineering Works, 2020 Edition

The General Specification for Civil Engineering Works lays down the quality of materials, the standards of workmanship, the testing methods and the acceptance criteria for civil engineering works undertaken for the Government of the Hong Kong Special Administrative Region. Where necessary, this General Specification should be supplemented by a particular specification.

土木工程通用指南规定了为香港特别行政区政府承建的土木工程的材料质量、工艺标准、测试方法和验收准则。 必要时，本通用指南应补充特定技术要求。

6.68.1 Earthworks final surfaces and formations shall be within the tolerances of the specified lines and levels stated in Table 6.3. The tolerances for formations do not apply to pipes or preformed structures that require to be supported over their complete length or area.

6.68.1 土方工程的最终表面和结构应在表6.3中规定的线和标高的公差范围内。结构公差不适用于需要在其整个长度或面积上进行支撑的管道或预制结构。

6.68.2 In excavation, a positive tolerance refers to insufficient excavation and a negative tolerance refers to excess excavation. In areas of fill, a positive tolerance refers to excess fill material and a negative tolerance refers to insufficient fill material.

6.68.2 在开挖中，正公差是指开挖不足，负公差是指过度开挖。在填充区域中，正公差是指填充材料过多，负公差是指填料不足。

6.69.1 A batch of fill material is any quantity of fill material of the same type and which in the opinion of the Engineer has similar properties throughout. For the purpose of testing for moisture content and relative compaction a batch shall, in addition to the above, be fill material which is deposited in a single layer in any area of fill presented by the Contractor for testing on one occasion.

6.69.1 一批填料是指监理工程师认为具有相似性质的任何数量的相同类型的填料。为了测试含水量和相对压实度，除上述内容外，一批填料还应为单层沉积在承包商提供的任何填料区域进行测试的填料。

6.70.1 Each sample of fill material shall consist of at least four increments taken from different parts of the batch. The increments shall be combined and thoroughly mixed and shall then be divided by quartering or by using a riffle box to obtain specimens of an appropriate size to carry out the individual tests.

6.70.1 填充材料的每个样品应至少由四个组份组成，这些组份取自该批次的不同部分。组份应组合并充分混合，然后通过四分之一或使用riffle盒进行划分，以获得适当尺寸的样本，从而进行单独的测试。

6.70.2 The size of samples of fill material other than rock fill material shall be in accordance with Geospec 3, Clauses 2.5.1, 4.2 and Table 2.1. Each sample of rock fill material of Grade size not exceeding 200 shall have a mass of at least 250 kg and each sample of rock fill material of Grade size exceeding 200 shall have a mass of at least 1000 kg.

6.70.2 除岩石填料以外的填料样品的尺寸应符合Geospec 3第2.5.1、4.2条和表2.1的规定。每个等级尺寸不超过200的岩石填充材料样品的质量应至少为250 kg，每个等级尺寸超过200的石头填充材料样品应至少为1000 kg。

6.71.1 Samples of fill material to be tested for particle size distribution, liquid limit, plasticity index, coefficient of uniformity and sulphate content shall be delivered at least 14 days, or such shorter period agreed by the Engineer, before deposition of the fill material starts. The number of samples to be provided from each batch shall be as stated in Table 6.4.

6.71.1 应在填充材料开始沉积前至少14天或监理工程师同意的更短时间内交付待测试颗粒尺寸分布、液限、塑性指数、均匀系数和硫酸盐含量的填充材料样品。每批样品的数量应如表6.4所示。

6.72.1 Each sample of fill material taken as stated in Clause 6.71 shall be tested to determine the particle size distribution. In the case of special fill material, testing shall include calculation of the coefficient of uniformity as stated in Clause 6.72(4). Unless otherwise agreed by the Engineer, each sample of fill material other than rock fill material shall be tested to determine the liquid limit and the plasticity index of that portion of the fill material passing a 425µm BS test sieve. Each sample of fill material, which will be deposited within 500 mm of concrete, cement, bound material, cementitious material or metalwork shall be tested to determine the soluble sulphate content.

6.72.1 应测试第6.71条中规定的每一个填料样品，以确定颗粒尺寸分布。如果是特殊填料，试验应包括第6.72（4）条中规定的均匀系数的计算。除非工程师另有约定，否则应对除岩石填料以外的每种填料样品进行试验，以确定通过425µm BS试验筛的那部分填料的液限和塑性指数。应测试将沉积在混凝土、水泥、粘结材料、胶结材料或金属制品500 mm范围内的每个填充材料样品，以确定可溶性硫酸盐含量。

6.72.2 The method of testing shall be in accordance with the following: (1) Particle size distribution : Clause 6.72(3) ; (2) Liquid limit : Test Method 6.1 of Geospec 3; (3) Plasticity index: Test Method 6.1 of Geospec 3; (4) Soluble sulphate content : Test Method 9.3 of Geospec 3; (5) Total sulphate content : Test Method 9.3 of Geospec 3.

6.72.2 试验方法应符合以下要求：（1）粒度分布：第6.72（3）条；（2） 液限：Geospec 3试验方法6.1；（3） 塑性指数：Geospec 3试验方法6.1；（4） 可溶性硫酸盐含量：Geospec 3的试验方法9.3；（5） 总硫酸盐含量：Geospec 3的试验方法9.3。

6.72.3 The particle size distribution of fill material passing a 75 mm BS test sieve shall be determined in accordance with Geospec 3, Test Method 8.1 or 8.2, whichever as instructed by the Engineer. The size of particles of fill material, which do not pass a 75 mm BS test sieve, shall be taken as the largest dimension measured in any plane.

6.72.3 通过75mm BS试验筛的填料的粒度分布应根据Geospec 3，试验方法8.1或8.2（以工程师指示的为准）确定。未通过75mm BS试验筛的填料颗粒尺寸应视为在任何平面上测量的最大尺寸。

6.72.4 The coefficient of uniformity (Cu) shall be calculated from the equation: Cu = D60/D10 where: D60 and D10 are the equivalent sieve sizes in millimetres, interpolated from the particle size distribution curve, through which 60% and 10% of the fill material would pass respectively.

6.72.4 均匀性系数（Cu）应根据以下公式计算：Cu=D60/D10，其中：D60和D10为等效筛网尺寸，单位为毫米，表示60%填料能够通过的筛网尺寸和10%的填料能够通过的筛网尺寸。均匀性系数通常根据粒度分布曲线插值得到。

6.73.1 If the result of any test for soluble sulphate content of fill material does not comply with the specified requirements for soluble sulphate content, each sample shall be tested to determine the total sulphate content.

6.73.1 如果填料可溶性硫酸盐含量的任何测试结果不符合可溶性硫酸盐含量规定的要求，则应对每个样品进行测试，以确定总硫酸盐含量。

6.73.2 If the result of any test for particle size distribution, liquid limit, plasticity index, coefficient of uniformity or total sulphate content of fill material does not comply with the specified requirements for the property, additional samples shall be provided from the same batch and additional tests for the property shall be carried out. The number of additional samples shall be as stated in Table 6.4.

6.73.2 如果填料的粒度分布、液限、塑性指数、均匀系数或总硫酸盐含量的任何测试结果不符合规定的性能要求，则应从同一批次中提供额外的样品，并进行额外的性能测试。额外样品的数量应如表6.4所示。