【正文】 specification. The stratum change, drilling status(drilling pressure and speed), ground water and some special circumstances during the drilling work shall be recorded in site. If geological conditions are not matched with geological report which causing undesirable drilling , stop the drilling immediately. Grouting for braced hole wall(grouting pressure as ～) shall be carried out timely. After initial setting of cement mortar, clean the hole and restart the drilling work. a、 滲水及塌孔的處理a. Treatment of Water Seepage and Hole Collapsing孔內有滲水時，在鉆孔過程中或鉆孔結束后吹孔時，從孔中吹出的都是一些小石粒和團粒而無粉塵，巖粉多貼附于孔壁。為確保錨孔深度，當遇特殊地質情況時，可適當增加超鉆深度，但不可超過500mm。然后用一根聚乙烯管復核孔深，并以高壓風吹孔，待孔內粉塵吹干凈，且孔深不少于錨桿設計長度時，拔出聚乙烯管，以織物或水泥袋塞好保護錨孔口待用。Control drilling speed according to geological condition. Drilling work shall be stopped in time when the obstacles or abnormal conditions occurred and take corresponding measures as soon as possible after checking. Drilling depth is 200mm greater than the designed anchor length.、錨桿采購及安裝 Anchor Purchase and Installation 預應力錨桿體由腰梁、自由段、錨固段和安全段四部分組成。First, according to the design length requirements to cut steel strand, bondfree steel strand shall be bent into Ushape by a cold bending machine and fixed on the barrier,and then assembled by the design of the load to plete the entire anchor body. Note that the steel strand should not be entangled with each other and ensure that the carrier is located in the middle of the borehole.（1） 、截取鋼絞線用切割機，嚴禁使用電氣焊；(1) Use cutting machine to get steel is prohibited to use the electrical welding.（2） 、鋼絞線編制在工作平臺上進行，其下料長度為：設計長度+錨梁厚度+張拉千斤頂長度+錨具厚度+張拉操作預留量。第二次注漿再次向錨固區(qū)高壓注漿，~，注漿壓力為2～，. M25 grout of cement is used as anchor grouting material. Firstly grout from the hole bottom outwards to the anchorage section with the cementsand ratio of 1:, watercement ratio of , grouting pressure of . Secondly grout with high pressure to the anchorage section with neat cement grout of watercement ratio of , grouting pressure of , and the termination grouting pressure shall not less than .、當孔口出現溢漿且持續(xù)時間不低于5min后(或排氣管停止排氣),方可停止注漿，注漿完畢后待砂漿凝固收縮后，空口進行補漿?；炷翝沧?，尤其在錨孔周圍，鋼筋較密集，必須仔細振搗，保證質量。 Before tension, inspection must be done to ensure the bearing face of the anchor angle bracket pedestal must be smooth and even, vertical to the axial line of anchoring rods. If not, relevant rectifying works shall be done.、張拉施工前必須對張拉機具和儀器儀表進行標定和調試校準。然后用水泥凈漿注滿錨墊板及錨頭各部分空隙，最后對錨頭采用不低于C30的混凝土進行封錨，防止銹蝕。 Normally, the actual consumption of grouting is more than theoretical volume. The grouting is pleted as the exhaust vent stops vent and the excessive grout is over flow from the exhaust vent mouth. If insufficient grouting or sedimentation after grouting, supplementary grouting shall be needed till the totally full of the grouting. To clean the grouting pipes, grouting guns, sleeves and make accurate, plete, clear grouting records after pleting grouting.、錨桿腰梁的施工 Construction of Intermediate Beam of Anchor腰梁采用C30混凝土現場整體澆注，OVM15錨具與其同時安裝澆筑固定。(5) The allowable deviation of anchor assembly shall coincide with the Chinese standard. After pleting the assembly, anchor hole shall be numbered corresponding to anchorage and stored in clarification on a dedicated place with anticorrosion protection as moisture proofing and rain proofing.、錨固注漿 Grouting本工程錨桿注漿采用二次壓力施工工藝。to ensure the protective layer thickness of anchor body is not less than 2cm. Manpower shall be adopted for anchor body installation. It shall be checked seriously for anchor hole serial number before use highpressure air to blow the hole after confirmed. Slowly put the anchor body into hole,use steel tape to measure the steel strand length outside the hole and calculate the inside hole anchor length(deviation controlled within 50mm) to ensure the anchorage length. 首先按照設計要求長度切割鋼絞線，用冷彎機將無粘結鋼絞線彎曲成U型并固定在承載體上，然后按設計荷載體間距組裝完成整個錨桿體。遇到障礙物或異常情況應及時停鉆，待情況清楚后再鉆孔或采取相應措施。After drilling to designed depth, drilling work cannot be stopped immediately and keep drilling 12mimutes to avoid insufficient size of hole and not up to the designed hole diameter. Any dregs and water cannot be attached on hole wall and must be cleaned out of hole. After drilling, blow the rock powder and water out from hole with highpressure air (～). Except for anchorage of integrity and hard rock , the rest anchor holes cannot be washed by highpressure water. If the confined water flew from anchor hole, anchorage and grouting could be carried out after water pressure and volume reduced, and set up drainage hole in suitable place if necessary. If it is required to deal with impounded water in anchor hole, grouting closure and secondary drilling will be adopted. ⑤、錨孔檢驗⑤ Anchor Hole Test錨孔鉆孔結束后，須經CMEC工程師檢驗合格后，方可進行下道工序。occurred. Grouting for braced wall by cement mortar with of grouting pressure shall be adopted for this kind of situation. Drilling work shall be restarted after 24 hours. Mud often seep into hole along fracture rock zone during work time in rainy days. Before grouting for braced wall, mud must be cleaned by water and air(no need to remove gravel which seeped into the hole)③、孔徑、孔深③ Diameter and Depth of Hole鉆孔孔徑、孔深要求不得小于設計值（設計孔徑150mm，孔深15～20m）。鉆孔過程中對每個孔的地層變化，鉆孔狀態(tài)(鉆壓、鉆速)、地下水及一些特殊情況作好現場施工記錄。Before anchor construction, arrange manpower to modify the slope surface timely from top to bottom layer by layer. When excavated to edge of the filling pile body, excavation height of each layer is equal to the spacing between intermediate beams. Over excavation is strictly controlled. Intermediate beam foundation can be excavated until excavating to the next terrace, and carry out the anchor working. After each slope excavation pleted, if occurred soil slope, it shall be covered by tarpaulin to avoid erosion by rain.、施作錨孔 Anchor Hole Drilling錨孔在腰梁基礎開挖完成，并經坡面地質條件確定能滿足錨桿施工要求后進行。 Adopt airdriven downhole hammer for anchor hole construction to effectively avoid the erosion of the slope. Fasten the construction speed. Adopt type 868 Y