《ar从根本上减少断桩基础补强处理.doc》由会员分享，可在线阅读，更多相关《ar从根本上减少断桩基础补强处理.doc（60页珍藏版）》请在三一文库上搜索。
1、http:/ http:/ http:/ http:/ 从根本上减少断桩基础补强处理1钻孔桩断桩的原因分析1 analysis of the causes of drilling pile broken pile 1.1钻孔桩成孔质量问题造成的断桩原因分析1.1 drilling pile hole quality problem caused by the fault reason analysis 由于泥浆护壁差、孔内水头压力不够等原因，在清孔后灌注混凝土过程中出现孔壁坍塌，造成断桩。由于清孔过程中未对孔内泥浆含砂率进行严格控制，造成在灌注混凝土过程中混凝土上沉渣过厚，导管内混凝土压力不足
2、以推动该部份沉渣，致使混凝土浇注中断。部分在河床上通过筑岛法施工的钻孔桩基础，由于河床表面有一层流塑性淤泥层，在混凝土浇筑过程中河床淤泥层顺孔壁流进钻孔内，致使混凝土浇注中断。Due to poor slurry-supported, hole head pressure is not enough, the hole cleaning after the collapse of hole wall, appeared in the process of pouring concrete pile breaking. Due to the black hole to hole the mud
3、in the process of sand ratio to carry on the strict control, cause in the process of pouring concrete on concrete to the too thickness of sediment, intraductal concrete pressure is not enough to push the ministry of sediment, the concrete pouring. Part on the river built by island construction metho
4、d of bored pile foundation, because the surface of the river a laminar flow plasticity silt layer, river bed silt layer in the process of concrete pouring flow in the wall of hole in drilling, the concrete pouring. 1.2钢筋笼及浇筑混凝土用导管的问题造成断桩的原因分析1.2 reinforcing cage and concrete analysis of the cause of
5、 broken pile with catheter questions 导管接头严重漏水，造成导管外泥浆及水进入导管，使导管内混凝土离析，导管堵塞，混凝土浇筑中断，造成断桩。Outside the pipe joint serious leaks, causing catheter mud and water into the pipe, the pipe inside the concrete segregation, catheter blockage, concrete pouring, caused the broken pile. 由于钢筋笼主筋焊接及箍筋绑扎存在问题，在混凝土浇筑
6、过程中，钢筋笼卡住导管，致使导管难以提起，混凝土浇筑中断，形成断桩。Because of reinforcing cage of main reinforcement welding and stirrup binding problem exists, in the process of concrete pouring, steel reinforcement cage stuck pipe, causing them to mention, concrete pouring, form the broken pile. 1.3浇筑用混凝土的问题造成断桩的原因分析1.3 casting w
7、ith concrete problems analysis of the cause of broken pile 混凝土塌落度过小，或和易性较差，造成导管堵塞，混凝土浇筑中断，造成断桩。由于混凝土供应问题，造成浇筑时间过长，浇注混凝土时首盘混凝土已经凝固，混凝土浇筑难以继续，造成断桩。由于混凝土中出现凝结的水泥块或石头等大块杂物，造成导管堵塞，混凝土浇筑难以继续，造成断桩。Fall through small concrete, or poor workability, causing catheter blockage, concrete pouring, caused the brok
8、en pile. Caused by supply problems of concrete, pouring time is too long, when pouring concrete before concrete has solidified, concrete pouring is difficult to continue, caused the broken pile. Due to condensation of concrete of concrete blocks or stones, etc. Large pieces of debris, causing cathet
9、er blockage, concrete pouring is difficult to continue, caused the broken pile. 2钻孔桩断桩的预防措施2 drilled pile pile breaking prevention measures 2.1加强成孔质量控制2.1 to strengthen quality control into a hole 护筒采用钢板制作，采用人工开挖埋设，护筒底部与土层相接处用粘土夯实，护筒外面与原土之间用粘土填满、夯实，土工布严防地表水从该处渗入。为保证护筒内外水头的压力差护筒内水位应高出护筒外水位1.5m，护筒埋设深度
10、3m以上，同时，如果在成孔范围内有流塑性淤泥等软弱夹层，应将护筒埋设穿越该软弱层。Buried liners made of steel plate by artificial excavation, protection and soil layer at the bottom of the barrel as clay compaction, liners between with the original soil outside the clay fill and compaction, fight infiltration of surface water from there. I
11、n order to ensure the protection of cylinder head of pressure difference inside and outside cylinder liners outside water level of 1.5 m, the water level should be higher than steel liners buried depth of more than 3 m, at the same time, if the hole radius flow plasticity silt soft interlayer, prote
12、cting tube should be embedding through the weak layer. 使用泥浆护壁，泥浆质量符合规范要求。对于地质条件差的钻孔，使用优质泥浆。成孔后进行清孔，清孔后泥浆比重、胶体率、含砂率、沉渣厚度等符合规范要求。Use the slurry-supported, mud quality conform to the requirements of the specification. For drilling with poor geological conditions, the use of high quality mud. Into a bla
13、ck hole after hole, hole cleaning after the mud weight, colloid ratio, sand ratio, sediment thickness conform to the requirements of the specification. 2.2控制浇筑混凝土用导管质量2.2 control of pouring concrete tube quality 为防止导管接头与导管漏水，施工中我们通过严格的事前、事中、事后控制，保证导管制作并具备以下条件：To prevent pipe joint and the pipe is le
14、aking, we through strict during construction in advance, matter and afterwards control, guarantee the catheter produced and satisfy the following conditions: 足够的抗拉强度，能承受其自重和盛满混凝土的重量。Sufficient tensile strength, able to bear its weight and the weight of the filled concrete. 各节的安装接头所用的胶垫及法兰的对接位置，预先试拼并
15、作好标记，按插导管时须按试拼时的状态对号拦装，所有的法兰盘接头均须垫入5-7mm厚的橡胶垫圈，安放时须对正放平，拧紧螺栓，严防漏水。Each section of the installation of rubber mat used in the connector and flange of the docking position, try to spell and tag them in advance in accordance with the inserted catheters should be according to the state reserved block, w
16、hen try to spell all flange joints shall be mat in 5-7 mm thick rubber gasket, when put on is flat, tighten the bolt, protected from leaking. 尽可能使用内径30cm以上的导管，并且内径应一致，其误差应小于2mm，内壁须光滑无阻，组拼后须用球塞、检查锤作通过试验。As far as possible use of more than 30 cm inner diameter tube, and the inner diameter should be co
17、nsistent, the error should be less than + / - 2 mm, inner surface should be smooth and shine, spellers ball plug, check after the hammer made by experiment. 最下端一节导管长度要长一些，一般为4米，其底端不得带法兰盘，以便在羟丙基甲基纤维素混凝土内更容易拔起。每节导管的长度要整齐统一，便于丈量长度，并作出标记和记录。The bottom section duct length is longer, generally for 4 meter
18、s, the bottom of the flange, so that in the concrete internal pull up more easily. Each section of the tube length to tidy uniform, is advantageous for the measurement of length, and make a marked and recorded. 导管使用前做好水密性试验。导管要布置在钢筋笼中心。Tube well water tightness test before use. Tube is arranged in t
19、he center of the steel reinforcement cage. 3.3控制钢筋笼加工质量3.3 control of reinforcing cage and processing quality 钢筋笼主筋焊接一般应采用对焊，以保证焊口平顺，当采用搭接焊时，要保证搭接部分不在钢筋笼内形成错台。钢筋骨架应有强劲的内撑架，保证在运输及吊装过程中不变形。Reinforcing cage main reinforcement welding butt welding should be used commonly, to ensure that the joint smooth
20、, when lap welding is used, to ensure the lap part is not formed in the steel reinforcement cage fault. Inside the cage of reinforcement should be strong brace, ensure no deformation in the process of transportation and hoisting. 3.4加强混凝土生产运输过程控制3.4 to strengthen the concrete production and transpor
21、tation process control 混凝土拌合运输能力均应能够满足灌注混凝土的要求，保证在灌注过程中能够满足现场需要。Concrete mixing transport capacity should be able to meet the requirements of pouring concrete, guarantee in the filling process can meet the needs of the scene. 混凝土配合比应满足灌注水下混凝土要求，即和易性、流动性都比较好，粗骨料粒径小于导管内径的1/8。Of concrete should meet th
22、e requirements of pouring underwater concrete, namely the workability and fluidity is good, the aggregate particle size less than 1/8 of the tube inner diameter. 3.5灌注混凝土过程中的控制3.5 the control in the process of pouring concrete 灌注首盘混凝土时，控制导管底部有2540cm的空间，保证首盘混凝土能顺利地灌注。同时，首盘混凝土的灌注量应至少保证灌注后将导管口埋入1m以上。在灌
23、注混凝土过程中，应随时对导管埋入深度进行测量，导管埋入深度遵循埋6拔4的原则，即导管埋入6米后，拔起并拆除4米，土工膜保证导管埋置深度在26米之间。在施工过程中，中途中断浇注时间不宜走过30分钟，整个桩的浇注霎时间不宜过长，尽量在8小时内完毕。混凝土施工中间每间断30分钟后，要上下串一上导管，防止混凝土失去流动性，提升导管困难，增加发生事故的可能性。Perfusion first set concrete, the control at the bottom of the tube is 25 40 cm space, can guarantee the first concrete perf
24、usion smoothly. At the same time, the first set of concrete perfusion measure should ensure at least buried pipe mouth perfusion after more than 1 m. In the process of pouring concrete, the catheter embedment depth is measured shall, from time to time, catheter follow the principle of buried 6 4 pul
25、l embedment depth, namely the catheter into 6 m, pull up and removed 4 meters, guarantee the catheter embedment depth is between 2 6 m. Midway through the construction process, pouring time shoulds not be walked 30 minutes, the whole pile pouring shoulds not be too long, we can try to finished withi
26、n eight hours. Concrete construction middle discontinuous every 30 minutes, to string up and down on a catheter, prevent loss of liquidity, concrete pipe, difficulties, increase the likelihood of an accident. （英文版 ） Two regulations promulgated for implementation is in the party in power for a long t
27、ime and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting each other, the adhere to a positiv
28、e advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the bot
29、tom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the pa
30、rty; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. and revised the necessity and revised history of the CPC Central Committee the amendment to
31、the Chinese Communist Party members and leading cadres honest politics several guidelines and column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience,
32、 respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the partys leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the and , reflects the pa
33、rtys 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the partys eighteen years comprehensive strictly practice. (a) revised two regulations o
34、f the party need of in based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the ac
35、tual needs. Content is too complicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third is banned terms and discipline la
36、w, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres above. is in 1997 based on revision,
37、in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, mo
38、re than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and seriou
39、s responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to and the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness i
40、n the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping
41、, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2014 under six months begin
42、study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectiv
43、ely held a forum will listen to part of the province (area) secretary of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is mainly responsible for people, views of experts and scholars and gr
44、assroots party organizations and Party members. Approved by the Central Committee of the Communist Party of China, on 7 September 2015, the general office of the Central Committee of the Party issued a notice to solicit the provinces (autonomous regions, municipalities) Party, the central ministries
45、 and commissions, state ministries and commissions of the Party (party), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attr
46、acting, formed a revised sent reviewers. In October 8 and October 12, Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China
47、 formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, and revision of the basic principles of two party regulations revision work and implement the partys eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General