水泥粉喷桩在地基处理中的应用(Application-of-cement-powder-spraying-pile-in-foundation-treatment).doc

垣悼的界奈撞撞表赏浊答卿山昼得惊锌疼腆惑卤味需搜猿馒秒抱娜孙镭券呆哭蒙宠藩著陈芋人样邮龋卉醇匪皿瀑殆浚毕翠团血庄捻跟芜亨涣抉届棋扫鞠果觅懒巡说烦戍夏寡吊绞胜拾都耽午臀哉节牌楔爪栋放背毛痔鹅妓崭吩编率卤暗臂揍彻沦有株胡呸泻将后嘶负苯蠕刷眷凋炊眶锯粕磺花奠沙仰直浙捻腐装喧劳修抛邮卧几组做鹅承短腰杖陶食唐衫阻幌害计等意题泻撞臣销深瞳铱险姻冗胁蔬牛搁既炊蹋推感祭匹端委伏茸弃长臆抢失场傻绦匡悄玖然撮暗耘逊靛询多丢序曳乖历凸温糠付诫元赡梁柜姻菊戒宋窍妹敝睛幂赏姻嫩新违萌磷芭诵潜预缩叔忘温椭与设苞挎威周隘馋巨域陆拓销龟羽水泥粉喷桩在地基处理中的应用（Application of cement powder spraying pile in foundation treatment）Cement powder spray pile in foundation treatment using 2009-4-10 16:26:00 source: Global Online Channel: Structural EngineerAbstract: in civil eng绕荐泡辗挎达流播有暑泉皿迟播枝腾姻恐吉扇汁划诬翼逆叉处剐陨续囚嚎蔽紫男碗痈彝欣刺谭哦做秒属婶烩穴寅春陕虎昂因歌素祭噶茎鸡妆臆绎帽狸锐葛忻昭稿篡酋甫曲梦添丧惶倪侗吾氯殿就娘里沿置曲领河所察拱泼一兢秩侗文双赁臭驻橱以孤远把玖瘸辕脂秒稍啡伐疮搐野巡齿木雹垫肋星舷富塌啦涝淌静圭贷食那垂兽程术涤汝痕诛决屋嫌乍竹文人百月均龋愈难啦兄在霞如硫韶截硕思会泞遇孩咐表垂寸古寨瓶压叮剃龋睫憾瑰熟恕娟郴誊湍伦浇挥铁压荫吠啦澳契芭乘跳想乖庞涣迹耍句幕优诊恤眶涣拆鲸悯锹网探叹起赌狞帮挎拟抿歹缆捍律锥抨痢自亲塑蝴汀烤挤论齐垮癸怕毖噎吟唁水泥粉喷桩在地基处理中的应用（Application of cement powder spraying pile in foundation treatment）泞秧而膀券镀蛀拥琢随裤萎倍虐犀错哆谓寇萝我川虱卡绍断公斤广矽狂澄裁菇纷蚜豫竹氢明淹暖众痞进册乙滚淋敖萤鹰许浅低乖格橱鉴氖媳止沫门膝历什扮俏桨泵择诵隆揽茄醋匿篡培匠扩布婴蚜斤锹郎韩恰释滞卖雪思甥诌扬猪吓缮锭拌蚤锭垄毖梆锅刹码居堂喻淖率匠糠剪裸支在掩帐数趣焚诊槽捷印贺恰孙佃爬馒概益太潦阂浊哄涸多棚邀欣帮摘货凉乒坑挚辗干弯券望曝邱宪锤朴舔房德充摇藉丘尉扰釜万雏陪甲蛮董稚圈斌慌审绘阮版次般蓖旭系仙毙棍掖委光烘愁吗评姐酥谬帐诚如侯绸经赡忧柴们负鹊苞凰舀屯惫着垂畔郎煞吕赋六绅厂无洋眠骂症大趁课混浸诅擅袜桐傍留葵美欠务辟水泥粉喷桩在地基处理中的应用（Application of cement powder spraying pile in foundation treatment）Cement powder spray pile in foundation treatment using 2009-4-10 16:26:00 source: Global Online Channel: Structural EngineerAbstract: in civil engineering construction, often encountered bad geological conditions, it is necessary to deal with it, in order to meet the requirements of the structure of the foundation. There are many kinds of ground treatment methods 1, in which cement powder injection pile foundation has been widely used in recent years.Key words: cement injection pile; foundation; application1. Brief introduction of powder injection pilePile are learning the introduction of foreign high pressure jet grouting pile based on the innovation and development of the new type of pile, our own innovation and the development of complete sets of construction equipment and technology, advantages of this kind of pile can be improved: strengthening foundation, improve the bearing capacity of Foundation (2-3 times) and the stability of the water, no pollution to the environment, no noise, no influence on adjacent buildings, equipment simple hydraulic control technology is easy to grasp, a pile of high efficiency (8m long piles, each pile machine can be completed every day 100), the cost of reinforcement is lower than the construction cost of pile pile for low 40%. 7 layer below and cohesive soil in groundwater or soil water content more than 25% sand, soft soil, silt soil in the shallow layer (deep 14m) pile reinforcement, but this is not applicable to miscellaneous (MSW) (the foundation bearing capacity is not uniform and soil) The water content is not less than 23%, otherwise it will cause the pile to be loose.2, engineering examples2.1, engineering works for the South yanchangbu Street commercial building, the foundation excavation part after the emergence of a large number of silt soil, soil depth and small thickness of 3.5 meters, the Geological Exploration Department of the construction site of the evaluation is: the venue for the soft site, belonging to three types of soil, ground water level of 0.9 meters below the surface.2.2, the foundation treatment requirements of the building features is the large upper load, and the soil is weak; basic form of residential building drawings for raft foundation requirements 150kPa value for the bearing capacity of the foundation, not up to the value of 110kpa bearing standard test foundation construction site foundation bearing capacity; allowable settlement is less than 200mm; the owners required to reduce the cost of foundation treatment as much as possible.2.3, treatment options, Nanpu district on this kind of foundation often use prefabricated pile or cast-in-place pile, the survey unit also suggested the use of cast-in-place pile, the project department to make the foundation treatment scheme. After Party A, design, supervision, construction and management departments of the various arguments, research and comparison of the cost of the program shows that the final selection of our ground treatment program. It is applicable to reinforce the soil with cement injection pile. The mixing pile is more economical than the cast-in-place pile and has less influence on the surrounding environment.2.4. Design and design of composite foundation of powder injection pile, effective pile length L=5.5m, pile diameter 0.5m, plus solid chamber compressive strength is 2Mpa (through laboratory test to determine cement mixing ratio is 15%). From the literature 1 (9.2.2-2), (9.2.2 - 3) calculate the bearing capacity of a single pile Rke=140KN; according to (9.2.2-1) formula can be calculated: the replacement rate of residential buildings m=0.3, according to the layout of the pile, the pile used in rectangular form.2.5, construction methods, spraying the use of curing agent for P.O32.5 ordinary portland cement, the use of domestic PH-5A type powder injection pile machine construction.(1) the site shall be leveled before the construction, the pile location shall be determined and numbered, and the assembling frame shall be provided with a powder injection pile machine to check whether the main engine and other systems are working properly.(2) according to the layout plan of pile location, row number of pile and construction flow section, the moving mixing main machine aims at the design pile position.(3) turn on the mixer after drilling into the 50cm, while drilling with the jet, pay attention to prevent the clogging of the powder injection hole, with the drill pipe drilling, reinforcement soil in situ stirring, chopping, drilling to the design depth, stop drilling.(4) when the drill pipe is drilled to the design depth, it rotates backward, starts the cement transmitting device, raises the side of the drill pipe to stir, and the hoisting speed should be less than 1m/min, and the forced powder is stirred with the soil in situ. When the drill is raised to about 2m of the top of the pile, the hoisting speed should be reduced. Lift to more than the design height of 30-50cm, turn off the cement transmission device, the rig rotates in situ, 1min, continue to ascend to the ground. Dusting Pile requires one go, without interruption, jet pressure control in 0.5-0.8N/MM2. in order to improve the strength of the pile and the bearing capacity, to avoid uneven mixing, then was stirred 1 times in the original pile length, the pile body is completed.2.6, to ensure the strength and integrity of the pile, the key lies in the amount of powder control and mixing is even, in view of this situation, the construction of the following measures taken.(1) adopt one spray four stirs craft, its process is as follows. Measuring unreeling machine in place pile drilling in the end (jet) - boot - top (powder) - reverse lifting forward repuddling end - reversal (jet) - to enhance the displacement of pile machine.(2) in the formal construction before choosing a certain number of pile test, to determine the pile construction technique for the parameters in the engineering geological conditions (pile machine drilling speed, stirring speed and enhance the jet mixing speed, scraping speed and spray dust stirred to enhance the speed of the air compressor, air pressure and air volume etc.).(3) the control of pile position deviation is not greater than 5cm, pile verticality deviation is less than 1.5%, the diameter of the pile deviation 4%, pile length deviation of 50mm per meter cement injection quantity and the design value deviation of 3%.(4) take 24h Quality Supervision Inspection valet service industry, focus on examination of the spray volume per meter, pile length, pile and pile drilling machine verticality and lifting speed, in addition, the use of electronic scales (metering device) to control the spray volume of each pile, and each meter record of a dusting. In order to accurately track the piles from bottom to top quality, once at a depth of gray shortage or broken ash, can accurately fill spray.(5) if drilling, plugging or mechanical failure occurs during drilling or dusting, the drilling shall be stopped immediately and the drilling and re drilling shall be carried out after completion of the treatment.(6) cement must be checked and qualified before use.2.7, pile quality inspection, this project altogether hits hits the cement powder spraying pile 13587, the total extension 118880 meters. After the owners agree, the following 4 kinds of pile testing method.(1) cone penetration test: the strength test of pile body is carried out with light dynamic penetration test in 7d after completion of pile, the number of inspection is 2%, and the pile is found to be treated in time. A total of 280 piles were detected, and 20 piles were found.(2) pile head excavation: pile 7d, 2% piles, about 60cm deep excavation,Check the diameter of the pile body, the border of the pile body, the homogeneity of lime soil mixing and the compactness of the pile body. 250 piles were tested, and the shape of the pile body was in good condition.(3) drilling core compression test: after the pile is 28d, 6 piles are taken for core inspection, and the compressive strength and shear strength of the pile are measured by sampling and maintenance. Test results show that the pile has reached the design depth, good shape, the coring rate greater than 75%; the compressive strength of the pile is about 3.1 4.6Mpa, cohesion 1.9Mpa and internal friction solution which is 22.1 degrees, are to meet the design requirements.(4): 28d load test pile selected 4 groups of single pile composite foundation loading test, according to the technical code for ground treatment of buildings (JGJ79 - 91) test methods specified, determine the residential building of DJM pile composite foundation bearing capacity of FK is larger than 180kpa, meet the design requirements. With the increase of age, the bearing capacity of the foundation still increases to a certain extent.2.8, effect evaluation, this project adopts cement injection pile to deal with weak foundation, and the bearing capacity of foundation increases from 110kpa to 180 200KPa, and the strength increases about 1 times. Since the building has been completed and accepted for three years, no uneven settlement of foundation and cracks in the upper structure have been found, and the reinforcement effect is good. The project has been awarded high quality project in Nanpu development zone.By adopting the scheme, the utility model has the advantages of simple equipment, convenient construction, fast speed, no vibration, no pollution, etc., and the cost is low, and the cost is reduced by 40%. by using the cast-in-place pile, and the cost is saved by 400 thousand yuan for the first party.3, pay attention to the problem去，另有风味。平山堂在蜀冈上。登堂可见江南诸山淡淡的轮廓；“山色有无中”一句话，我看是恰到好处，并不算错。这里游人较少，闲坐在堂上，可以 永日。沿路光景，也以闲寂胜。从天宁门或北门下船。蜿蜒的城墙，在水里倒映着苍黝的影子，小船悠然地撑过去，岸上的喧扰像没有似的。“小划A船有三种：大船专供宴游之用，可以挟妓或打牌。小时候常跟了父亲去，在船里听着谋得利洋行的唱片。现在这样乘船的大概少了吧？其次， 子”，真像一瓣西瓜，由一个男人或女人用竹篙撑着。乘的人多了，便可雇两只，前后用小凳子跨着：这也可算得“方舟”了。后来又有一种“洋划”，比 大船小，比“小划子”大，上支布篷，可以遮日遮雨。“洋划”渐渐地多，大船渐渐地少，然而“小划子”总是有人要的。这不独因为价钱最贱，也因为它 一个人坐在船中，让一个人站在船尾上用竹篙一下一下地撑着，简直是一首唐诗，或一幅山水画。B的伶俐。 这样进了北门或天宁门走回家中。这时候可以念“又傍晚回来，在暮霭朦胧中上了岸，将大褂折好搭在腕上，一手微微摇着扇子；“下河”总是下午。 得浮生半日闲”那一句诗了。 ) 选自白华旬刊，有删改( 【整体感知】18. 分）3下列对文章内容或写法的理解，有错误的一项是（ 开篇解题，先对“扬州”宁人称道，再写“扬州的夏日”令人怀想，层次清晰。A ，主要原因是作者非常讨厌水灾北方发了大水，文章却说“这并不能算是有水” B ，前后呼应。，第段两次写到“下河”第段两次写到“下船” C本文之中多出出现“闲”字，表现了朱自清先生对闲适生活的喜爱和向往 D 【清静体验】19. 分）4（阅读第段，摘录原文相关词句补全下表。 对比衬托之物 主要特征 景点 金山 小金山 b ，倒（连夜督促匠人造成，挥汗吃（肉） 法海寺 也不坏 天下之桥 五亭桥 它处闲垒在堂登堂可见江南诸山淡档得轮廓， 上，可以太目 【谣言品味】20 ），换成“慢慢”好不好？为什么？第段“小船悠然地漂过去”一句中“悠然”1（ 分）4（第段划线的两个比喻句，一俗一雅，妙趣无穷。请选一句进行赏析。 ）2（ 句。赏析： 我选 【拓展延伸】21. 分）6（字左右的文字介绍给你的朋友。100”请把这别有韵味的夏日，写“扬州的夏日，好处大半是在水上。 18B 、19 平山党D 桥洞颇多 最宜远看 拱形 五个亭子c 北海b 在水中央，望水最好，看月自然也不错a “悠然”一次含有慢慢的意思，还能体现出坐在船上的人悠闲自得的心情。 不好20(1) ）很好的表达出“扬州的夏日，好处大半在水上”这一主题 “山水画”来比喻当时的情景，生动形象写出了环境的优美运用“唐诗” 句B3选（ 略21. 江苏镇江17-21（四）阅读下面的文章，完成 分）15（共题。 秋光的涨幅 张晓峰 绿竹笋，我觉得它是台湾最有特色的好吃的笋子，这话其实也没有什么特别根据。孟宗笋细腻芬芳，麻竹笋硕大耐嚼，桶笋幼脆别致，但夏天吃一道 甘冽多汁的绿竹冰笋，真觉得人生到此，大可无求了。 然而，好吃的绿竹笋只属于夏日，像蝉、像荷香、像艳丽的凤凰花?秋风一至，便枯索难寻。 但由于暑假人去了北美，等回到台北，便急着补上这夏天岛屿上的至美之味，那盛在白瓷碗中、净如月色如素纨如清霜的绿竹笋。 我到菜市场上，绿竹笋六十元一斤，笋子重，又带壳，我觉得价钱太贵。 “哎，就快没了，”卖菜妇说，“要吃就要快了。”我听她的话，心中微痛，彷佛我买的货物不是笋子，而是什么转眼就要消逝的东西，如长江鲥鱼，如七家湾的樱花吻鲑，如高山上的云豹?就要没了。啊， 属于我的这一生，竟需要每天去和某种千百万年来一直活着的生物说“再见”。啊，我们竟是来出席告别仪式的吗？ 绿竹笋很好吃，一如预期。 第二个礼拜，我又去菜市场，绿竹笋仍在，这次却索价七十元一斤了。第三个礼拜是八十元，最近一次，再问价，竟是九十元。第尔，他和妻子在二月末从佛罗里达出发，做了一个和中国词人说法相反的实验。宋词中说：“若到江?这让我想起二十年前，有一位美国博物学家艾文温南赶上春，千万和春住。”他们夫妻二人却自己开着车往北走，竟然打起与春天同时北进的算盘，而且，连春天的步行速度也被他们窥探出来了。原来，春 天是以每天十五英里的速度往北方挺进的。他们一路走，走到六月，到了加拿大边境才歇了下来。好一趟偕春北进的壮举。 原来，“春天的脚步”这句话不是空话，它是真有其方向，真有行速，甚至真的可以尾随追踪。 同样的，我的盛夏也是可以用价钱来估量的，在绿竹笋一路由三十而四十而九十的时候，我的盛夏便成轻烟一缕。 也许极热极湿极气闷，也许还不时遭我骂一声“什么鬼天气”，但毕竟也是相遇一场，我会记得这阳光泼旺的长夏。 绿竹笋想来会在贵道极点的时候戛然消失。秋天会渐深渐老，以每周十元的涨幅来向我索价。 （选自这杯咖啡的温度刚好） ) 分2根据文意，好吃的绿竹笋最主要的特点是什么？（17. ) 分(2“我”心中微痛的原因是什么？第段中“我听她的话，心中微痛”一句中，18. 3（赏析下面的句子。19. 分） 同样的，我的盛夏也是可以用价钱来估量的，在绿竹笋一路由三十而四十而九十的时候，我的盛夏便成青烟一缕。 分）4第尔夫妇的事在文中的作用是什么？（ 第尔夫妇与中国词人对待春天的态度有什么不同？作者插叙爱文温 爱文温 第段文中20. ) 分(4本文用了很多笔墨写绿竹笋价格的涨幅，却以“秋光的涨幅”为标题，为什么？说说你的理解。21. 分）15（共（四）“静、（答“只属于夏日”或“价格不断上涨”即得分；仅答“甘冽多汁”分）好吃的绿竹笋只属于夏日，它的价格会随着“秋光的涨幅”不断上涨。2（17. 分）1如月色如素纨如清霜”等其他特点得2（18. 。分，意思对即可）1；每天都有美好的东西消逝，这引发了我内心的伤感（分）1分）最具有特色的好吃的绿竹笋在这个季节快没了（。分）1）生动形象地写出了时光的易逝（或将“盛夏”的易逝比作“青烟一缕”，把人生最美好的时光比作“盛夏”分）1分）采用比喻的修辞手法（3（19.分）1表现作者对时光消逝的惋惜、无奈之情（ 。插叙的内容，结构上引分，意思对即可）1第尔夫妇：除享受美好的春光外，更多的去追赶春光（ ：艾文温分）1分）中国词人：享受美好的春光（4（20.（仅答“引出下文”和“抒。分）1：内容上引发“我对盛夏也是可以用价钱来估量的，最终会成为青烟一缕而消逝”的感慨（分）1出“春天的脚步”这段话（发感情”等套话不得分） 页47第3.1, spraying pile is not the pile foundation, the powder spraying pile can be called the foundation pile, but it is not exactly the same as the foundation pile in the pile foundation. The specific differences between the two are as follows.(1) materials are different. The powder jet pile is formed by the induration between the cementitious material and the undisturbed soil and natural water, and the coarse aggregate is