【文章內(nèi)容簡介】 錨孔編號（詳見附圖一、二、三）。鉆機(jī)安裝好后，進(jìn)行全面質(zhì)量檢查，檢查鉆機(jī)方位、傾角、水平度和開孔鉆頭落點(diǎn)差。檢查合格后再進(jìn)行施工。 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)動潛孔錘鉆孔施工，能有效地避免沖刷坡體，施工速度快。錨桿孔施工選用優(yōu)博林868型錨固鉆機(jī)，錨孔直徑約φ150mm，設(shè)計錨孔深度為58m，與水平夾角25度成孔。 Adopt airdriven downhole hammer for anchor hole construction to effectively avoid the erosion of the slope. Fasten the construction speed. Adopt type 868 Youbolin anchorage drilling rig for anchor hole construction. The diameter of the anchor hole is about φ150mm, the designed depth of the anchor hole is 58m, 25 degree boreforming with horizontal angle.、錨孔鉆孔技術(shù)參數(shù)根據(jù)所鉆部位孔內(nèi)地層情況確定。 The technical parameter of anchor hole is based on the geological condition of the drilled location.、鉆壓：鉆孔過程中，鉆壓保持平穩(wěn)，不得隨意增減壓力。 Drilling pressure: keep stable pressure during drilling and don’t change the pressure randomly.、轉(zhuǎn)數(shù)：正常鉆孔中，保持中等轉(zhuǎn)數(shù)。松散土層及破碎巖石中采用低轉(zhuǎn)數(shù)，完整基巖中鉆孔中適當(dāng)提高轉(zhuǎn)數(shù)。 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。 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，首先用人工及時按照從上而下分層修坡。開挖至灌注樁樁身邊緣時，每層開挖高度為錨桿上下橫梁間距大小，嚴(yán)格控制超挖，直至開挖至下級平臺，然后再開挖腰梁基礎(chǔ)并施作錨桿。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。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(chǔ)開挖完成，并經(jīng)坡面地質(zhì)條件確定能滿足錨桿施工要求后進(jìn)行。Anchor hole shall be drilled after pleting foundation excavation of intermediate beam and ensuring that geological condition of slope can meet the requirement of anchor construction.、錨孔測放 Anchor Hole Measure and Setting out根據(jù)實際坡面，先按設(shè)計布置要求，將錨孔位置準(zhǔn)確測放在坡面上，并用紅油漆在現(xiàn)場施工部位標(biāo)明錨桿開孔位置（詳見附圖一）。如遇坡面不平順或特殊困難場地時，須經(jīng)設(shè)計單位認(rèn)可，在確保坡體穩(wěn)定和結(jié)構(gòu)安全的前提下，適當(dāng)調(diào)整錨孔定位。對測放并驗收合格的錨孔位置進(jìn)行編號，并用油漆標(biāo)示在現(xiàn)場坡面上，該編號作為錨桿制作編號的依據(jù)。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(shè)備 Drilling Equipment 為提高鉆孔效率和保證鉆孔質(zhì)量，鉆孔機(jī)具采用優(yōu)博林868型錨固鉆機(jī)，潛孔沖擊成孔。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，確保錨孔開鉆就位縱橫誤差、高程誤差、鉆孔傾角和方向、方位符合中國規(guī)范標(biāo)準(zhǔn)。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，難以鉆孔時方可采用水鉆。Adopt 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(qiáng)鉆機(jī)的導(dǎo)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(shè)計及規(guī)范要求。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(xiàn)場施工記錄。如遇地質(zhì)情況與地勘報告不符出現(xiàn)不良鉆孔現(xiàn)象時，須立即停鉆，及時進(jìn)行孔道固壁灌漿處理(～)，待水泥砂漿初凝后，重新掃孔鉆孔。Strengthen guide role of drilling machine during the anchor hole drilling, check deviation error of hole timely and adopt reasonable corrective measure to ensure anchor hole meeting design requirements and 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(nèi)有滲水時，在鉆孔過程中或鉆孔結(jié)束后吹孔時，從孔中吹出的都是一些小石粒和團(tuán)粒而無粉塵，巖粉多貼附于孔壁。當(dāng)錨孔深度已滿足要求，則以高壓風(fēng)吹凈，直至吹出清水。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(dāng)鉆孔穿越強(qiáng)風(fēng)化巖層或巖體破碎帶時，往往發(fā)生塌孔。出現(xiàn)此類現(xiàn)象進(jìn)行固壁注漿，漿液為水泥砂漿,24h后重新鉆孔。雨天施工時，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)。When drilled weathered rock and fracture rock zone, hole collapsing frequentlyoccurred. Grouting for braced wall by cement mortar with