【摘要】：為了增強油氣長輸管道站場建設(shè)中高填方邊坡工程的穩(wěn)定性,首次引進了土體加筋技術(shù)。該技術(shù)能大大提高整個被加筋土體的抗拉性能,并改善其抗壓性能,使其整體性能大為改善。采用該技術(shù)不僅能很好地解決高填方工程的穩(wěn)定性問題,而且還具有造價低、工期短、施工難度小的優(yōu)點。為了消化吸收這一先進技術(shù),總結(jié)了云南成品油安寧站(其填方邊坡高達30 m,是迄今為止油氣管道行業(yè)中最大面積的填方工程)邊坡工程中加筋技術(shù)的設(shè)計關(guān)鍵和加筋工程的施工關(guān)鍵。研究結(jié)果表明:(1)筋帶布置要重點考慮筋帶長短和筋帶間距;(2)設(shè)計中應(yīng)將回填的起始面做成反傾狀,這樣雖會增加一些土方量,但卻可以極大地增強穩(wěn)定性;(3)根據(jù)回填料中的碎石含量,碎石土的摩擦角取30°~35°是比較符合實際的;(4)每幅筋帶的寬度一般為5 m,幅與幅間搭接寬度一般介于20~30 cm;(5)施工中摻拌的碎石含量應(yīng)滿足要求,同時要翻拌均勻;(6)設(shè)計文件中應(yīng)明確壓實前的攤鋪厚度;(7)碾壓要控制邊角處及兩次碾壓的搭接處;(8)當(dāng)一層碾壓完畢后,應(yīng)立即現(xiàn)場進行壓實度檢驗,檢驗方法采用灌砂法即可。
[Abstract]:In order to enhance the stability of high fill slope engineering in the construction of oil and gas pipeline station yard, soil reinforcement technology was introduced for the first time. This technique can greatly improve the tensile performance of the whole reinforced soil, improve its compressive performance, and greatly improve its overall performance. This technique can not only solve the stability problem of high fill engineering, but also have the advantages of low cost, short construction period and low construction difficulty. In order to digest and absorb this advanced technology, the Yunnan Oil products Anning Station (its fill slope is up to 30 m) is summarized. So far, it is the key to the design of reinforcement technology and the key to construction of reinforced engineering in slope engineering, which is the largest area of filling engineering in oil and gas pipeline industry. The results show that: (1) the length and spacing of the reinforcement strip should be considered in the arrangement of the steel strip; (2) the initial surface of the backfill should be made into a reverse dip shape in the design, which will increase the earthwork amount, but it can greatly enhance the stability; (3) according to the content of crushed stone in backfill, the friction angle of gravel soil is 30 擄~ 35 擄. (4) the width of each band is generally 5 m, and the width of overlap between amplitudes is 20 ~ 30 cm;. (5) the content of macadam mixed in the construction should meet the requirements, and the mixing should be even; (6) the spreading thickness before compaction should be defined in the design document; (7) the corner and the overlap of the second rolling should be controlled. (8) the compaction test should be carried out immediately after the first layer is compacted, and the test method can be used by filling sand.
【作者單位】： 中國石油管道局工程有限公司;
【分類號】：TE973
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本文編號：2317639