【正文】 并保證承載體位于孔的中部，錨桿保護(hù)層厚度不小于20mm。即第一次注漿材料和注漿壓力與一般地層相同，第二次注漿為高壓劈裂注漿，待第一次注漿4～5h后，采用M25純水泥砂漿對(duì)錨固段進(jìn)行劈裂注漿，～。 Before casting, it is requested to fix the bearing plate of the anchor pad to the steel bars of intermediate beam according to the design requirement. The axial line of anchorage device shall be in the same direction of the anchoring holes. Then to conduct the site casting, vibrating to guarantee the quality.、腰梁允許偏差和檢驗(yàn)方法符合中國(guó)規(guī)范要求 The allowable deviation and testing methods of intermediate beams shall be coincide with the relevant Chinese standards. 、腰梁澆筑完成后，必須加強(qiáng)灑水養(yǎng)護(hù)工作，確保腰梁質(zhì)量。 The installation of the anchorage device shall be closely attached and centering with the bearing plate and jack. The jack axial line, the anchoring holes, the anchoring rods shall be in one line. No bend or deviation to the anchor heads is allowed to make sure the load is even and coaxial. Strength the load by applying a 25cm25cm2cm steel bearing plate.、在錨桿張。在設(shè)計(jì)張拉完成后，適時(shí)進(jìn)行一次補(bǔ)償張拉，然后加以鎖定。如一次注不滿或注漿后產(chǎn)生沉降，要補(bǔ)充注漿，直至注滿為止。索體采用人工下錨，緩慢從孔口送入。Prestressed anchor is made up of intermediate beam, free segment, anchorage section and safety section. Adopt pressuredispersed anchor.162。 length of drilling tool shall meet designed depth of anchor hole. Drawing back of drill shall be carried out smoothly .Checking with highpressure air blowing and no any obvious dust and water shall be found. After blowing up the dust in hole and the depth of hole is not less than designed length of anchorage, polyethylene pipe shall be pulled out and hole shall be covered by fabric or cement bags. Position, inclination and direction of anchor hole shall be rechecked at the same time. Anchor hole drilling is regarded as passed inspection when all the anchor hole construction work item is qualified. Allowable deviation of anchor hole inspection shall meet the specification requirements.、鉆孔質(zhì)量保證 Drilling Quality Assurance嚴(yán)格掌握鉆孔的方位，調(diào)正鉆桿，符合設(shè)計(jì)的水平傾角，并保證鉆桿的水平投影垂直于坑壁，經(jīng)檢查無(wú)誤后方可鉆孔。若遇錨孔中有承壓水流出，待水壓、水量變小后方可安裝錨桿與注漿，必要時(shí)在周?chē)m當(dāng)部位設(shè)置排水孔處理。雨天施工時(shí)，常常順巖體破碎帶向孔內(nèi)滲流泥漿,固壁注漿前，必須用水和風(fēng)把泥漿洗出(塌入鉆孔內(nèi)的石塊不必清除)。Exactly measure and set out the anchorage position according to slope, accurately fix drilling machine and strictly adjust the machine’s position to ensure the deviation in vertical and horizontal direction and elevation conform to Chinese standard. Ensure the drilling angle and direction in accordance with Chinese standard.①、鉆孔方式① Drilling Methods錨孔鉆孔采用干鉆，以確保錨固工程施工不至于惡化邊坡巖土工程地質(zhì)條件和保證孔壁的粘結(jié)性能，難以鉆孔時(shí)方可采用水鉆。開(kāi)挖至灌注樁樁身邊緣時(shí)，每層開(kāi)挖高度為錨桿上下橫梁間距大小，嚴(yán)格控制超挖，直至開(kāi)挖至下級(jí)平臺(tái)，然后再開(kāi)挖腰梁基礎(chǔ)并施作錨桿。 According to requirement of drawing, surveyors measure and determine the location of anchorage hole, hammered it into the relevant pile and indicate serial number of the anchor hole(see Attachment 1,2,3). After pleting the drill machine installation, overall quality inspection shall be performed for position, inclination and levelness of the drill and placement difference of opening bit. Construction shall be continued after the inspection is passed.、錨孔采用風(fēng)動(dòng)潛孔錘鉆孔施工，能有效地避免沖刷坡體，施工速度快。 The designed strength of M173 anchorage with 3 holes shall be equal or more than 380KN which match with that steel strand with 3162。、絞線2162。 Completing the approach and test of raw materials 。 2. Site Preparation Drawings and Design Description of the Site Preparation of Gampaha,Attanagalla amp。 Minuwangoda Integrated Water Supply Scheme. 阿塔納水廠工程場(chǎng)地平整設(shè)計(jì)施圖、圖說(shuō)（送審版）。 1).Preparation Work: The quality and quantity of equipment preparation together with the quantity and structure of human resource arrangement must be patible with the construction of prestressed anchor to meet the construction needs。 執(zhí)行標(biāo)準(zhǔn)GB/T 52242014，錨桿規(guī)格采用絞線3162。 Anchorage: The designed strength of M172 anchorage with 2 holes shall be equal or more than 340KN which match with that steel strand with 2162。檢查合格后再進(jìn)行施工。 During the drilling proceed, remove the residue timely and keep the inside hole smooth.、主要施工方法： Main Construction Methods 、坡面修整 Clean Surface of Slope錨桿施工前，首先用人工及時(shí)按照從上而下分層修坡。In order to improve drilling efficiency and guarantee drilling quality, type 868 Youbolin anchorage drilling rig shall be adopted to drill. Position of Drilling Machine根據(jù)坡面準(zhǔn)確測(cè)放錨桿孔位，準(zhǔn)確安裝固定鉆機(jī)，并嚴(yán)格認(rèn)真進(jìn)行機(jī)位調(diào)整，確保錨孔開(kāi)鉆就位縱橫誤差、高程誤差、鉆孔傾角和方向、方位符合中國(guó)規(guī)范標(biāo)準(zhǔn)。出現(xiàn)此類(lèi)現(xiàn)象進(jìn)行固壁注漿，漿液為水泥砂漿,24h后重新鉆孔。除相對(duì)堅(jiān)硬完整的巖體錨固外，余均不得采用高壓水沖洗錨孔。After pletion of drilling work, the next procedure could be continued only after inspected and qualified accepted by CMEC engineer. Inspection for hole diameter and depth shall be carried out with standard drill rods with the witness of CMEC engineer. Drill shall be propelled smoothly without any impact and vibration during inspection process。錨桿體采用人工安裝，安裝前，認(rèn)真核對(duì)錨孔編號(hào)，確認(rèn)無(wú)誤后再用高壓風(fēng)吹孔，緩緩將錨桿體放入孔內(nèi)，用鋼尺量出孔外露出的鋼絞線長(zhǎng)度，計(jì)算孔內(nèi)錨桿長(zhǎng)度(誤差控制在50mm范圍內(nèi))，確保錨固長(zhǎng)度。(3) Set a φ48 * 35mm isolation stent along the length of the anchor every2000mm(see Attachment 4, 5), install the bunching line (binding wire) between the adjacent two isolation stent to make anchor fixed. The strand shall not be entangled with each other ,and ensure that the carrier is located in the middle of the hole and the thickness of the protective layer of the anchor is not less than 20 mm.（4） 、錨桿下料完成入孔安裝前，用高壓風(fēng)清孔一次。 Adopt the secondary high pressure splitting grouting to improve the stratum anchorage force, when encountering the stratum rock mass worse joint fracturing development, breakage structure zone, weak rock mass or developed underground water. Namely, the first grouting material and pressure are same as the normal stratum, the second grouting is high pressure splitting grouting. 45 hours after first grouting, to start splitting grouting to the anchorage section by using M25 neat cement mortar with the pressure not less .、錨桿注漿的實(shí)際耗漿量一般要大于理論用量，現(xiàn)場(chǎng)施工以錨具排氣孔不再排氣且孔口漿液溢出濃漿作為注漿結(jié)束的標(biāo)準(zhǔn)。 Spray sufficient water to concrete for curing to ensure the quality of the intermediate beam after pletion of intermediate beam casting.、錨桿張拉、鎖定、檢測(cè)及封錨 Anchoring Tension, Locking,Test and Seal 當(dāng)漿體及腰梁、錨梁的混凝土強(qiáng)度等級(jí)達(dá)到設(shè)計(jì)強(qiáng)度的80%后