一、 施工基本情况及施工内容
1、本段路基处理段为K13+090～K13+139.8，其长度为49.8m，此段为水田及鱼塘等，工程地质条件较差，为缓冲桥头位置处的荷载作用力按设计要求，该段采用粉喷桩作软基处理。
2、本段软基处理共有三段：K13+090～K13+104.3(三角加固区)；K13+104.3～K13+125.1(桥头加固段)；K13+125.1～K13+139.8 (过渡段)。各段粉喷桩单根长分别为：5m、6.5m、8m。粉喷桩的直径均为50cm，桩与桩间的中心距为150cm，共有粉喷桩1254根。
3、施工前先进行成桩试验，试验的根数不少于5根。通过确定以下参数：钻进速度、提升速度、搅拌速度、喷气压力等，记录各种参数数据，检验地质情况是否准确及工艺参数、成桩质量、取样方法和桩的设计指标是否满足实际情况。
二、施工工艺流程
见《粉喷桩施工工艺图》
三、施工方法
1、施工准备
I. Basic construction and construction elements
1, the processing section of roadbed for the K13 +090 ~ K13 +139.8, a length of 49.8m, this section for the paddy fields and fish ponds, poor geological conditions, as the bridgehead position in a loading buffer force according to design requirements, which used the Pile for Soft.
2, this paragraph there are three paragraphs Soft: K13 +090 ~ K13 +104.3 (triangular reinforcement area); K13 +104.3 ~ K13 +125.1 (reinforced roadbed); K13 +125.1 ~ K13 +139.8 (Transition). Pile single long paragraphs were: 5m, 6.5m, 8m. Pile diameter were 50cm, piles and piles center distance between the 150cm, Total DJM 1254.
3, carried out before construction of pile testing, testing not less than five roots. By determining the following parameters: penetration rate, increase speed, stirring speed, jet pressure, record the data of various parameters to test the accuracy of geological conditions and parameters, into a pile of quality, sampling methods and indicators of whether the design of piles to meet the actual situation.
Second, the construction process
See "Pile Construction Technology Map"
Third, construction method
1, construction preparation