A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of sandy soil geological cut-off wall
The invention provides a construction method of a sandy soil geological cut-off wall. A planned position of the cut-off wall is drilled along two sides of the width, so that a row of grouting holes and a row of negative pressure holes are formed; a PC pipe with two opened ends is inserted into each negative pressure hole; then at the same time during grouting into each grouting hole, and a negative pressure is applied to the upper end of the PC pipe in the negative pressure hole corresponding to the grouting hole being grouted, so that guide force is formed between the grouting hole and the negative pressure hole, and paste in the grouting hole penetrates clearance in sandy soil under effects of the guide force and gets cured gradually to form the underground cut-off wall. The method disclosed by the invention has the beneficial effects that the characteristic of good penetration performance of sandy soil geology is utilized, the sandy soil is coordinated with the grouting method, thecut-off wall with mixing of the sandy soil and cement is finally formed, construction is easy, efficiency is high, and anti-seepage effects are good; and the paste forms the wall under guidance of theguide force, a sandy soil stratum is cured by the cement paste, and the characteristic of a high permeability rate of the sandy soil is effectively utilized, so that the underground cut-off wall is built without disturbance of the stratum, and the method is beneficial for environmental protection.
一种砂土地质防渗墙施工方法,在规划的防渗墙位置沿宽度两侧钻孔形成一排注浆孔和一排负压孔，并在负压孔内插入两端开口的PC管，之后再向注浆孔内注浆的同时，与正在注浆的注浆孔对应负压孔内的PC管上端施加负压，从而在注浆孔和负压孔之间形成导向力，注浆孔内的浆体在导向力的作用下穿过砂土的空隙并逐渐固化形成地下防渗墙。本发明利用砂土地质本身渗透性能好的特点，将其与注浆法配合，最终形成砂土和水泥混合形成的防渗墙，施工简单，效率高，防渗效果好；采用导向力引导浆体成墙，水泥浆体固化了砂土地层，有效利用了砂土渗透率高的特点，从而在不扰动的地层情况下，筑成地下防渗墙，有利于环境保护。
Construction method of sandy soil geological cut-off wall
The invention provides a construction method of a sandy soil geological cut-off wall. A planned position of the cut-off wall is drilled along two sides of the width, so that a row of grouting holes and a row of negative pressure holes are formed; a PC pipe with two opened ends is inserted into each negative pressure hole; then at the same time during grouting into each grouting hole, and a negative pressure is applied to the upper end of the PC pipe in the negative pressure hole corresponding to the grouting hole being grouted, so that guide force is formed between the grouting hole and the negative pressure hole, and paste in the grouting hole penetrates clearance in sandy soil under effects of the guide force and gets cured gradually to form the underground cut-off wall. The method disclosed by the invention has the beneficial effects that the characteristic of good penetration performance of sandy soil geology is utilized, the sandy soil is coordinated with the grouting method, thecut-off wall with mixing of the sandy soil and cement is finally formed, construction is easy, efficiency is high, and anti-seepage effects are good; and the paste forms the wall under guidance of theguide force, a sandy soil stratum is cured by the cement paste, and the characteristic of a high permeability rate of the sandy soil is effectively utilized, so that the underground cut-off wall is built without disturbance of the stratum, and the method is beneficial for environmental protection.
一种砂土地质防渗墙施工方法,在规划的防渗墙位置沿宽度两侧钻孔形成一排注浆孔和一排负压孔，并在负压孔内插入两端开口的PC管，之后再向注浆孔内注浆的同时，与正在注浆的注浆孔对应负压孔内的PC管上端施加负压，从而在注浆孔和负压孔之间形成导向力，注浆孔内的浆体在导向力的作用下穿过砂土的空隙并逐渐固化形成地下防渗墙。本发明利用砂土地质本身渗透性能好的特点，将其与注浆法配合，最终形成砂土和水泥混合形成的防渗墙，施工简单，效率高，防渗效果好；采用导向力引导浆体成墙，水泥浆体固化了砂土地层，有效利用了砂土渗透率高的特点，从而在不扰动的地层情况下，筑成地下防渗墙，有利于环境保护。
Construction method of sandy soil geological cut-off wall
一种砂土地质防渗墙施工方法
YUAN YANZHAO (author) / BAI ZHE (author) / CHEN ZHUO (author) / ZHU HANYU (author) / FAN ZHE (author) / YANG MINGFEI (author) / ZHAI JUYUN (author) / LI RUIDUO (author)
2020-10-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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