【正文】 e(design hole diameter is 150mm,hole depth is 15～20m). In order to ensure anchor hole diameter, the actual diameter of drill bit shall not less than design hole diameter. In order to ensure anchor hole depth, the actual drilling depth shall be more than of the design depth but not exceed . However, in case of special geological condition, drilling depth may be increased appropriately but shall not more than 500mm. ④、錨孔清理④ Clean Anchor Hole鉆孔達到設計深度后，不能立即停鉆，要求穩(wěn)鉆1～2分鐘，防止孔底緊縮、達不到設計孔徑。同時要求復查錨孔孔位、傾角和方位，全部錨孔施工分項工作合格后，即可認為錨孔鉆造檢驗合格。采用壓力分散型錨桿，鋼絞線采用162。(2) Strand meshing shall be done on the work platform, the cutting length is: design length + anchor beam thickness + tension jack length + anchor thickness + tension operation reserve.（3） 、沿錨桿長度方向每隔2000mm設置一個φ48*35mm隔離支架（詳附圖四、五），相鄰兩隔離架之間安設束線環(huán)(綁扎絲)對錨桿進行綁扎固定。 To stop grouting when the excessive grout is flowing from the hole mouth and lasts more than 5 minutes(or the vent pipe stop air exhaust). After pleting grouting and the mortar solidifying and contraction, to regrouting for the hollow areas .、當遇地層巖體較差節(jié)理裂隙發(fā)育、破碎構造帶、軟弱巖層或地下水發(fā)育，為提高地層錨固力，采用二次高壓劈裂注漿。Adopt whole castinsitu for the intermediate beam with C30 concrete. The OVM15 anchorage devices shall be installed ,cast, and fixed simultaneously with casting work. To partially adjust the space between the stirrups if the anchors rods interference with the vertical beam stirrups. To guarantee the quality ,more attention shall be paid for vibration when casting especially for the area around the anchoring holes which is full of steel bars.、澆注混凝土前，必須將錨具中的錨墊承壓板按照設計要求固定在腰梁鋼筋上，錨具軸線與錨孔方向一致，再一起現(xiàn)場澆注、振搗，保證質(zhì)量。 Before tension, calibration and adjustment must be conducted to the tension tools, instruments and meters. 、錨具安裝與錨墊板和千斤頂密貼對中，千斤頂軸線與錨孔及錨桿體軸線在一條直線上，不得彎壓或偏折錨頭，確保承載均勻同軸，并采用25cm25cm2cm鋼墊片予以加強。補償張拉后，從錨具量起，留出長5～10cm鋼絞線，其余部分截去，須用機械切割，嚴禁電弧燒割。注漿結(jié)束后，將注漿管、注漿槍和注漿套管清洗干凈，同時準確、完整、清晰地做好注漿記錄。(4) Before the anchor installation, the hole shall be cleaned with highpressure air. Rope shall be inserted slowly from the top of the hole by manual.（5） 、錨桿組裝的允許偏差符合中國標準，組裝完成后對錨桿對應錨孔進行編號，分類存放在專用場地，并加以防潮、防雨等防銹蝕保護。 high strength low relaxation prestressed steel strand shall be used. The steel strand is provided with a wire loop every 2m along the axis of the anchorStrictly control the position of hole, adjust drill pole to meet the designed horizontal angle and guarantee that horizontal projection of drill pole is perpendicular to pit wall. After get qualified inspection can continue to drill.鉆孔時應根據(jù)工程地質(zhì)情況，控制鉆孔速度。如果要求處理錨孔內(nèi)部積聚水體，一般采用灌漿封堵二次鉆孔等方法處理。When drilled weathered rock and fracture rock zone, hole collapsing frequentlyAdopt dry drilling method to ensure that anchorage construction will not deteriorate the geological condition of the slope and guarantee the adhesive property of the hole wall. Water drilling method shall be adopted only when it is hard to drill. ②、鉆孔工藝② Drilling Process 錨桿鉆孔施工要加強鉆機的導向作用，及時檢測孔斜誤差，合理采用糾偏措施，確保錨桿鉆孔滿足設計及規(guī)范要求。完成每層坡面開挖后，若為土質(zhì)坡，及時用彩條布覆蓋，防止雨水沖刷邊坡。錨桿孔施工選用優(yōu)博林868型錨固鉆機，錨孔直徑約φ150mm，設計錨孔深度為58m，與水平夾角25度成孔。. Two types anchorages shall conform to the operative norm of GB500862015.、錨板：錨板尺寸300*300*25(mm)，錨板中間圓孔尺寸根據(jù)錨具圓孔確定（錨具3孔），墊板的圓孔外徑等于錨具圓孔外邊距；錨板尺寸300*300*25(mm)，錨板中間圓孔尺寸根據(jù)錨具圓孔確定（錨具2孔），墊板的圓孔外徑等于錨具圓孔外邊距。；沿錨桿長度每隔2000mm，采用Φ48*； Anchor: The steel strand with the specification and model of 162。Completing the preparation, submitting and approval of related technical documents including construction program and construction starting report, etc。 Minuwangoda Integrated Water Supply Scheme. (Approval Version) 阿塔納水廠工程地質(zhì)勘探報告及實地考察施工現(xiàn)場周邊環(huán)境情況。 1. The relevant contents and related technical terms about Site Preparation included in the Bidding Document of Gampaha,Attanagalla amp。The anchor construction shall be performed simultaneously with the slope excavation. After the pletion of supporting construction of upper slope, excavating to the construction location of prestressed anchor, then carrying out the construction of intermediate beam and prestressed anchor and finishing supporting work for slope in order to reduce exposure time of slope. 1) 、準備工作：機具配備質(zhì)量和數(shù)量，人員配置數(shù)量和結(jié)構等必須與預應力錨桿施工相適應，滿足施工需要；完成原材料進場及試驗檢測；完成施工技術方案、開工報告等技術資料的編寫、上報和審批，技術交底資料的下發(fā)學習，原材料送檢、報批手續(xù)及資料收集。. Length of anchor: its length shall be ～ and the anchorage length shall be 5～ depth that the anchor hacked into the original concrete foundation shall be not less than 1m. 、錨桿入射角度：25度 Injection Degree:25 degree、錨桿直徑：150mm Diameter of anchor:150mm、錨桿：采用鋼絞線162。 執(zhí)行規(guī)范GB500862015。鉆機安裝好后，進行全面質(zhì)量檢查，檢查鉆機方位、傾角、水平度和開孔鉆頭落點差。 Revolving speed: keep medium speed in normal drilling proceed. Keep low speed for the loose soil and broken rock. Appropriately improve the speed for unbroken bedrock.、鉆孔過程中，隨時保證孔內(nèi)排渣暢通，及時排出孔內(nèi)巖渣。Based on existing slope surface, position of anchor hole shall be measured and set out exactly and marked by red paint at the construction point according to designed arrangement(see Attachment 1 for details). If uneven slope surface or special geological condition occurred, adjust position of anchor appropriately on premise of getting approval from design unit and ensuring stability of the slope and safety of the structure. Position of anchor holes which have been measured, set out and verified shall be numbered and marked on the slope surface with paint. The serial number shall be regarded as anchorage making evidence . 、鉆孔設備 Drilling Equipment 為提高鉆孔效率和保證鉆孔質(zhì)量，鉆孔機具采用優(yōu)博林868型錨固鉆機，潛孔沖擊成孔。During drilling or blowing hole after drilling, gravel and aggregate without dust are blew out from holes if water seepage occurred in hole ,and rock powder generally is attached to hole wall. When the depth of anchor hole has met the requirements, blow the hole with highpressure air until water is blew out. b、 塌孔、卡鉆的處理b. Treatment for Hole Collapsing and Drill Sticking當鉆孔穿越強風化巖層或巖體破碎帶時，往往發(fā)生塌孔。鉆孔孔壁不得有沉碴及水體粘滯，必須清理干凈，在鉆孔完成后，使用高壓風(～)將孔內(nèi)巖粉及水體全部清除出孔外。錨孔檢驗項目允許偏差符合規(guī)范要求。鋼絞線沿錨桿體軸線方向每隔2m設置一道架線環(huán)，保證錨桿體保護層厚度不小于2cm。鋼絞線不得相互纏繞