振动式插板机对塑料排水板回带现象的处理

1、振动式插板机对塑料排水板回带现象的处理振动式插板机对塑料排水板回带现象的处理根据相关规范规定，严格检查塑料排水板的回带长度，当其超过50cm时，必须在相邻板位处补打一根，且回带的根数不宜超过打设总根数的5%。为有效减少塑料排水板回带，本文就对塑料排水板施工的“回带”现象进行探讨，谈些体会，供同行参考，不妥之处，敬祈斧正。Accord ing to the releva nt regulati ons, strict insp ecti on of p lastic drain age p late back belt len gth, whe n it exceeds 50cm, must m

2、ake a root in the adjace nt p late at the back, and the root nu mber should not take more tha n a total nu mber of 5%. I n order to effectively reduce the p lastic drain age p late back, this article focuses on the con structi on of p lastic drain age board " back " phenomenon is discussed

3、, talk about some exp erie nee, for referen ce, inapprop riate, Jing Qi Fu zhe ng.1. 塑料排水板“回带”现象概述 1 P lastic drain age board " back " phenomenon of塑料排水板施工顺序为：定位T将塑料排水板通过导管从管靴穿出T将塑料排水板与桩尖连接贴紧管靴并对准桩位T插入塑料排水板T拔管剪断塑料排水板。插板机就位后通过振动锤驱动套管对准插孔位下沉，排水板从套管内穿过与端头的锚靴相连， 套管顶住锚靴将排水板插到设计入土深度，拔起套管后，锚靴连同排水

4、板一起留在土中，然后剪断连续的排水板，即完成一个排水孔插板操作。插板机就可移位到下一个排水孔继续施打。在插设过程中，可能会因为套管中进入淤泥，增大了塑料板与套管壁的摩擦力以致造成塑料板带出，这就是回带。排水板与管靴连接示意图见下图。 塑料排水板穿过插板机的套管，从套管下端穿出，与专用管靴连接。The con structi on seque nee of p lastic drain age boards : the locati on and the p lastic drain age p late through the catheter from the tube boots out,

5、 the p lastic drain age p late and p ile tip is conn ected tightly tube boots and alig n p ile to in sert the p lastic drain age p late, pipe cutt ing of p lastic drain age plate. Insertion machine in place through the vibration hammer drive bushi ng alig nment Jack sink, drain through the cas ing a

6、nd is conn ected to the an chor boots end, sleeve an chor boots to the drain age p late in serted into the desig n dep th, p ull up the cas ing, an chor boots together with dra in age board in the soil, and the n cut the con ti nu ous drain age board, to compi ete a drain age hole board op erati on.

7、 In sert ing p late can shift to the n ext drain age holes continue to p lay .In the in sert ing p rocess, may be because the sleeve into the mud, in creases the fricti on p lastic board and the casing wall so as to cause the plastic plate is brought out, which is brought back. Drain age p late and

8、tube boots conn ecti on diagram below.Plastic drain age p late through a cannula in serted machi ne, from the cas ing wear, conn ected with the sp ecial tube boots.图排水板与管靴连接示意图Figure drain age p late and tube boots conn ecti on diagram（1）.排水板（2）.排水板弯折部分（3）.管靴（4）.套管(1 ). The drain age p late (2 ). Th

9、e drain age p late bending part ( 3 ). ( 4 ) the cas ing pipe shoe.为了避免淤泥进入板芯以致堵塞排水通道，影响排水效果，防止塑料排水板被带出，塑料排水板导管靴与桩尖均为采用圆形。 桩尖平端与导管靴配合适当，避免错缝，防止淤泥在打设过程中进入导管、增大对塑料排水板的阻力。底部端头的塑料排水板应反折回一定长度，与“-”或“ H”形锚销可靠连接，并且锚销与导管下端口密封要严。In order to avoid silt into the core that block ing the dra in age cha nn els, dr

10、a in age effect, p reve nt the p lastic drain age p late is take n out, p lastic p late drain age catheter boots and p ile tip are using circular. Pile tip flat end and the catheter boots with the appropriate, avoid the wrong seam, pr eve nt silt in the p lay set into the catheter, the p rocess of i

11、n creas ing the resista nee of p lastic dra in age p late. P lastic drain age p late at the bottom end of the back should be a certain length, and " - " or " H " shaped an chor pin and reliable conn ecti on, an chor pin and the pipe port seals should be strictly.2. 塑料排水板回带的原因分析An

12、 alysis of 2 p lastic drain age p late back to the cause of2.1原因1:淤泥挤入管内The 2.1 reas on 1: silt into the tube塑料排水板在插设过程中，由于承压淤泥具有极强的流动性， 受桩靴与插管的密封程度影响，淤泥极易挤入管内，造成排水板粘在插管内壁，导致插管上提时，排水板自重及土体摩擦力远小于插管上提时对排水板的摩阻力，从而导致全程回带现象的产生（见图1a）。Plastic dra in age p late in the in sert ing p rocess, because the p res

13、sure mud has a strong fluidity, the seali ng of the p ile shoe and the cannu la, silt are easy to squeeze the tube, caus ing drain age p late glued to the inner wall of the in tubati on cannu la, lead to men tio n, drain age and soil frictio n is much smaller tha n the weight lifti ng on the drain a

14、ge tube the frictio n plate, result ing in the en tire back phenomenon ( see Figure 1a ).2.2原因2:被土体夹住2.2 reas ons: 2 by soil cla mp插管未堵塞，塑料排水板部分回带。该现象多发生在插设深度较浅，且土层较为干硬的情况，原因是插管上提后，桩位成孔，排水板无法被土体夹住，当桩管上提到较为软塑性土层时，周围土体可以夹住排水板底端，此现象为部分回带。Was not blocked, p lastic drain age p late part back. This phenom

15、enon occurred in the inserting depth is shallow, and the soil is dry and hard situati on, reas on is put after in tubati on, p ile hole, drain age board can not be cla mped whe n soil, p ile pipe that is soft p lastic soil, soil can cla mp the dra in p late bottom, this phenomenon is part of back be

16、lt.2.3原因3:摩擦力The 2.3 reas on 3: fricti on塑料排水板在插设至设计深度后,由于排水板自重、桩靴的重力及土体摩擦力小于插管上提时对排水板的摩阻力，导致桩靴弹不开,从而导致整根回带现象（见图1b）。Plastic drain age p late in the in sert ing depth to the desig n, becausethe fricti on force of gravity and the weight of soil drain age board, p ile shoe tha n in tubati on duri ng li

17、fti ng of drain age p late fricti on, result ing in pile shoe bomb does not open, result ing in the whole back zone (see Figure图1b:摩擦力图1a：淤泥挤入管内Figure 1A: silt into the tube map 1b: fricti on3、对塑料排水板回带现象的处理 3, the p lastic drain age p late with the phenomenon of the back3.1振动式插板机回带现象的处理:3.1 vibrati

18、ng p late in sert ing machi ne back with the phenomenon of the:以往处理塑料排水回带现象，通常采用提高桩靴与插管底端结合处的密封性，但由于插管下沉遇较硬土层时，受振动锤上下振动力的影响，导致桩靴与插管之间局部产生间隙，土体极易挤入插管内，而造成排水板的回带现象。通过工程的实践证明，振动插板机只要增加一套自动冲水装置、改造进料（带）口及改造桩靴工艺便能够大幅度降低回带现象。Previous treatme nt with p lastic drain age back phenomenon, usually by increasing

19、 pile shoe and the bottom end of the spile joint sealing, but because the in tubati on in the hard stratum subside nee, vibrati on hammer un der vibrati on force in flue nee, causes betwee n the p ile shoe and in tubati on local gen erati on gap, soil easily into the in sert ing tube, back to the ba

20、nd phenomenon caused by the drain age board. Proved by engin eeri ng p ractice, as long as the in crease of vibratio n machi ne for inserting a set of automatic flushing device, feeding (band) and tran sformatio n of shoe tech no logy can greatly reduce the time zone.3.1.1自动冲水装置3.1.1 automatic flush

21、 ing device在插管沉设过程中，给插管内加水，这样便额外增加了向下的力，参照公式（G插管内水自重+G桩靴自重及排水板自重+F 土体摩擦力 N插管上提时对排水板的摩阻力），从而基本上解决了塑料排水板的回带现象。该冲水装置由高压水泵、耐高压塑料水管组成，在插管进料口上方固定住塑料水管的一端， 高压水泵的开关安装在插板机操作室，在插管沉设过程中，操作人员打开水泵开关，给插管内冲水。冲水高度由现场操作人员根据地质情况控制，本工程插板施工实践证明，当插管进入原状土时开始冲水，插至设计深度后停止加水再提管，效果较好。若遇土体中存在较厚淤泥或淤泥质土层时，可适当增加冲水时间，即在插至设计深度稍停片刻

22、再关水 （以插管内的水不从进料口溢出为准），然后再提管，这样可以避免淤泥挤入插管内导致回带现象的发生，而且增加了排水板插设的成功率。In the tube settling process, water pipe, this additional down force, accord ing to formula ( G in tubatio n water dead weight of +G p ile shoe weight and drain age board is +F soil fricti on > N in tubati on duri ng lift ing of dr

23、a in age p late fricti on ), which basically solves the back with the phenomenon of p lastic drain age p late the. The flush ing device comp rises a high p ressure water pump, high pr essure p lastic pipe, tube feedi ng in above the fixed end of plastic pipe, the switch of high-pressure water pump i

24、n stalled in the in sert ing machi ne op erat ing room, in the tube settli ng p rocess, the op erator to open the pump switch, to pipe flush ing.Flushi ng height by op erators accord ing to the geological con diti ons of the pr oject con trol, i nsert ing p late con structi on p ractice pro ved that

25、, whe n the cannula into the un disturbed soil at the start of the flushi ng, in sert ing depth to the desig n after the cessati on of water aga in, good results. There are soil in the thick layer of silt or silty soil, may be appropriate to in crease the flushi ng time, n amely in the inserting dep

26、th to the desig n to pause for a moment and then close the water ( to pipe water does not overflow from the feed opening in .), and the n the pipe, this can avoid silt into the cannula to happen with the phenomenon of the, but also in creases the dra in age p late in sert ing success rate.3.1.2进料（带）

27、口改造The 3.1.2 feed (with ) tran sform主要目的是减小塑料排水板在进料口的摩擦力， 即：在插管进料口下端增加一组光滑的滚轴，在插管上拔时，滚轴转动以减小塑料排水板与轴之间的摩擦。The main purp ose is to reduce fricti on, p lastic drain age p late in the feed opening is: in the in tubatio n feedi ng port is added a set of smooth roller, at in tubati on duri ng p ulli ng, r

28、otatio n of rollers to reduce frictio n betwee n p lastic drain age p late and shaft.3.1.3桩靴改造工艺 3.1.3 pile shoe tran sformatio n pr ocess主要目的是增加桩靴自重，即：在桩靴下部焊接一块钢筋条。The main objective is to in crease the weight, the p ile shoe n amely: weldi ng a steel bar at the lower part of the pile shoe.3.2液压式插板

29、机回带现象的处理:3.2 hydraulic flashboard machi ne back with the phenomenon of the:3.2.1 一次性钢板桩靴工艺3.2.1 dis posable steel sheet p ile shoe tech no logy通过自制一次性长方形钢板，上部点焊拉手形状的钢条。施工工艺为：首先将排水板从插管底部拉出，穿过拉手式钢条并折回，折回长度约15cm20cm，然后用大号订书丁将其固定，操作人员拉紧排水板的另一端，使钢板与桩靴底部紧贴，最后开始插板施工。该工艺是将钢板桩靴留入土体中，主要是增加桩靴、排水板与土体的摩擦力,通过塑料排水

30、板深度记录仪显示，该施工方式十分有效的控制了回带现象。其优点：当插至较软土层时，钢板紧包插管底端，不易出现进泥堵管现象；当插至较硬土层时，有钢板保护排水板，不易出现断板现象。提高了插设的成功率，减少了人员、机械、材料等资源的浪费。缺点：使用该一次性钢板桩靴成本偏高。Through the app licati on of dis posable recta ngular p late, the upper part of han dle sha pe steel sp ot weldi ng. The con structi on method is as follows: first, th

31、e drain age p late is p ulled out from the tube bottom, through the handle bar and back, back to a length of about 15cm 20cm, and then fixed with a large book Ding, tighte n drain age board op erator at the other end, the steel plate and the bottom shoe close, finally began inserting p late con stru

32、cti on. This is the p rocess of the steel sheet p ile shoe residue in the soil, is to in crease the frictio n pile shoe, drain age and soil, dis played by p lastic dra in age p late depth recorder, the con structi on mode is the effective con trol of the back band phenomenon. The utility model has t

33、he adva ntages of: whe n in serted into the soft soil layer, the bottom end of the sp ile p late tightly wrapp ed, not easy to app ear into the mud pl uggi ng phenomenon; whe n in serted into the hard stratum, a steel p late pr otecti on drain age board, board break ing phenomenon does not easily occur. Improve the pl ugg ing success rate, reducti on of personn el, machi nery, materials and other waste of re