韋云廣
摘? 要:高速發(fā)展的社會(huì)經(jīng)濟(jì),形成了大范圍覆蓋的巖土工程的增多。在當(dāng)前進(jìn)行的工程巖土勘察中,普遍運(yùn)用了地球物理勘探技術(shù)重要分支之一和先進(jìn)的地震勘探手段之一的波速測(cè)試技術(shù)。波速測(cè)試技術(shù)應(yīng)用于巖土工程勘察中,使在室內(nèi)測(cè)試中可能出現(xiàn)的誤差較大的問(wèn)題能得到有效解決,且能夠在動(dòng)彈性模量、動(dòng)剪切模量等工程動(dòng)力學(xué)參數(shù)的計(jì)算中進(jìn)行運(yùn)用,其技術(shù)的優(yōu)勢(shì)明顯和充分的發(fā)揮了出來(lái)。文章基于深入分析波速測(cè)試的重要性和技術(shù)原理的基礎(chǔ)上,對(duì)該技術(shù)在巖土工程勘察中的應(yīng)用進(jìn)行了探討。
關(guān)鍵詞:波速測(cè)試;巖土;工程勘探
中圖分類號(hào):P631 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):2095-2945(2020)26-0182-02
Abstract: The rapid development of the social economy has resulted in an increase in large-scale geotechnical engineering coverage. In the current engineering geotechnical survey, the wave velocity testing technology, one of the important branches of geophysical exploration technology and one of the advanced seismic exploration methods, is commonly used. Wave velocity testing technology is used in geotechnical engineering surveys, which can effectively solve the problem of large errors that may occur in indoor testing, and can be used in the calculation of engineering dynamic parameters such as dynamic elastic modulus and dynamic shear modulus. When applied, the advantages of its technology are clearly and fully exerted. Based on the in-depth analysis of the importance of wave velocity testing and technical principles, this paper discusses the application of this technology in geotechnical engineering survey.
Keywords: wave velocity test; geotechnical; engineering exploration
高速發(fā)展的社會(huì)經(jīng)濟(jì)帶動(dòng)了國(guó)土整治工程的全面鋪開,二十世紀(jì)八十年代以來(lái),我國(guó)巖土工程項(xiàng)目數(shù)量逐年增加,對(duì)勘察技術(shù)的發(fā)展要求也越來(lái)越緊迫。作為先進(jìn)的工程物探技術(shù)之一,波速測(cè)試技術(shù)廣泛應(yīng)用于現(xiàn)代巖土工程的勘察中。波速測(cè)試技術(shù)作為一種重要的檢測(cè)和監(jiān)測(cè)手段,漸漸受到國(guó)內(nèi)外巖土工程界的重視。目前,波速測(cè)試技術(shù)已應(yīng)用于鐵路工程、工業(yè)與民用建筑工程、水利水電工程、石油工程、冶金工程等巖土工程地質(zhì)勘探領(lǐng)域,取得的實(shí)際效果十分理想。由于巖石的類型、組成和結(jié)構(gòu)的不同,各層具有不同的物理性質(zhì),可以通過(guò)彈性波速等參數(shù)來(lái)反映。鉆孔剪切波速試驗(yàn)是利用土層的物理特性,通過(guò)對(duì)不同巖土層的橫波(S波)和壓縮波(P波)之傳播速度的測(cè)量,計(jì)算動(dòng)態(tài)參數(shù)、場(chǎng)地優(yōu)期、評(píng)價(jià)場(chǎng)地地震效應(yīng)、確定場(chǎng)地類型、判斷巖土層的工程性質(zhì),提供依據(jù)給工程設(shè)計(jì)使用。……