CAJ | 학술논문

在深圳地铁建设的全风化花岗片麻岩暗挖隧道施工中，常规施工方法极难控制，稍有不慎就会造成拱顶坍塌或者地面下沉，使得施工安全风险不断增大，同时也容易造成地面破坏。在深圳地铁某联络线区间段暗挖隧道施工中，由于采用了水平旋喷桩施工工艺，在暗挖隧道拱顶形成一个环状帷幕体，对原土体进行了改良，不仅克服了软弱围岩自稳性差的弱点，而且起到了抗变形、防流沙、防渗透的作用，成功地解决暗挖隧道在全风化花岗片麻岩层中近距离穿越浅基础建筑物的难题，充分显示了水平旋喷桩施工工艺在软弱地质条件下浅埋暗挖隧道开挖预支护工程应用上的优势。
재심수지철건설적전풍화화강편마암암알수도시공중，상규시공방법겁난공제，초유불신취회조성공정담탑혹자지면하침，사득시공안전풍험불단증대，동시야용역조성지면파배。재심수지철모련락선구간단암알수도시공중，유우채용료수평선분장시공공예，재암알수도공정형성일개배상유막체，대원토체진행료개량，불부극복료연약위암자은성차적약점，이차기도료항변형、방류사、방삼투적작용，성공지해결암알수도재전풍화화강편마암층중근거리천월천기출건축물적난제，충분현시료수평선분장시공공예재연약지질조건하천매암알수도개알예지호공정응용상적우세。
During undermining completely decomposed granitic gneiss of Shenzhen Metro Project,controlling is quite diffi-cult by conventional method,and any carelessness may cause collapse or subsidence.It will increase risk and ground fail-ure.By using horizontal rotating jet grouting piles during the interval construction of a contact line for Shenzhen Metro Pro-ject,a ring curtain body mixed is formed in the tunnel vault.This kind of soil improvement technique not only overcomes the poor self-stability of the weak surrounding rocks,but also plays a role of anti-deformation,anti-quicksand,and anti-seepage,and then it successfully solves the problem of mined tunnel underpassing the existing buildings at close range in completely decomposed granitic gneiss,and fully illustrates its great efficiency of horizontal rotating jet grouting piles in weak geological condition of shallow buried tunnel excavation and pre-supporting engineering.