TBM超前鉆孔測試及圍巖施工特性快速評價系統(tǒng)研究
發(fā)布時間：2018-08-29 15:38
【摘要】：本文圍繞著TBM主要進行了兩方面的論述,第一方面,超前鉆孔工程力學(xué)測試。進行了兩次綜合性的現(xiàn)場試驗:既有間接試驗(鉆孔試驗、單孔聲波試驗),也有直接試驗(點荷載試驗、單軸抗壓強度試驗),獲得了大量的地質(zhì)信息與巖石力學(xué)信息,建立了超前鉆探隨鉆參數(shù)與巖體質(zhì)量評價指標(biāo)的關(guān)系,從而能夠通過超前鉆快捷、有效、定量地探明掌子面前方巖石塊體的單軸抗壓強度、大小和地下分布,以及界面斷面的產(chǎn)狀、延伸、凸凹起伏平整度、厚度和充填物質(zhì)的物理和力學(xué)性質(zhì)。第二方面,圍巖施工特性快速評價系統(tǒng)研究。首先通過室內(nèi)的花崗巖鉆孔試驗?zāi)MTBM掘進試驗,在鉆孔的同時通過DPM系統(tǒng)記錄下鉆進過程中的轉(zhuǎn)速、扭矩、推進力、鉆進位移等參數(shù),然后利用各參數(shù)進行多元函數(shù)擬合分析;同時為了尋求一個替代鉆進速度來評價巖石質(zhì)量的參數(shù),引入了鉆進比能的概念,效果較好;然后回歸到TBM掘進試驗,基于海量的現(xiàn)場掘進數(shù)據(jù)和大量的工程地質(zhì)信息,類比花崗巖鉆孔試驗,選取刀盤轉(zhuǎn)速、刀盤扭矩、推進力、推進位移等參數(shù)進行多元函數(shù)擬合分析。然后引入掘進比能的概念,在不同強度分級的圍巖的條件下與掘進速度進行對比分析。主要的結(jié)論有兩點:數(shù)字鉆機(DPM)能夠在鉆進的同時通過相應(yīng)傳感器記錄下轉(zhuǎn)速、壓強、扭矩、鉆進位移等參數(shù),通過鉆進速度可以直觀的反映巖體的強度特性;但是對于同一種巖石,不能僅僅依靠鉆進速度一個量來進行圍巖分類,應(yīng)綜合考慮壓強、轉(zhuǎn)速等參數(shù)帶來的加成效應(yīng)。掘進比能相對于掘進速度而言,波動性更小,誤差更小(10%),與巖石分類的標(biāo)準(zhǔn)相關(guān)性好,可作為巖體質(zhì)量評價的標(biāo)準(zhǔn);圍巖強度越小,扭矩功率(扭矩做功)對掘進速度的貢獻越大,說明圍巖強度較弱的情況下,適當(dāng)提高扭矩,可有效加快掘進速度;而當(dāng)圍巖強度較強時,可適當(dāng)提高推力,加快掘進效率。
[Abstract]:This paper mainly discusses two aspects about TBM: first, advance drilling engineering mechanics test. Two comprehensive field tests were carried out: both indirect test (borehole test, single hole acoustic test) and direct test (point load test, uniaxial compressive strength test). A large amount of geological information and rock mechanics information were obtained. The relationship between the parameters of drilling while drilling and the evaluation index of rock mass quality is established, so that the uniaxial compressive strength, size and underground distribution of rock block in front of the face can be quickly, effectively and quantitatively ascertained by advanced drilling. And the occurrence, extension, ups and downs, thickness and physical and mechanical properties of the interface. The second aspect, the surrounding rock construction characteristic fast appraisal system research. First of all, the TBM tunneling test is simulated by indoor granite drilling test, and the parameters such as rotation speed, torque, propulsion force, drilling displacement and so on are recorded by DPM system while drilling. At the same time, the concept of drilling specific energy is introduced in order to find a parameter to evaluate rock quality instead of drilling speed, and then return to the TBM tunneling test. Based on the massive field tunneling data and a large amount of engineering geological information, the parameters such as the rotation speed of the cutter head, the torque of the cutter head, the propulsion force and the propelling displacement are selected and analyzed by multi-element function fitting. Then the concept of driving specific energy is introduced and compared with the tunneling velocity under the condition of different strength classification surrounding rock. The main conclusions are as follows: (DPM) can record the parameters of rotational speed, pressure, torque, drilling displacement while drilling, and can directly reflect the strength characteristics of rock mass by drilling speed; But for the same rock, we should not only rely on drilling velocity to classify the surrounding rock, but also consider the additive effect of pressure and rotational speed. Compared with the tunneling speed, the tunneling ratio is less volatile and the error is smaller (10%), which has a good correlation with the criteria of rock classification, and can be used as the criterion of rock mass quality evaluation, and the smaller the surrounding rock strength, the smaller the surrounding rock strength. The greater the contribution of torque power (torque work) to the tunneling speed, the higher the driving speed can be if the strength of surrounding rock is weak, and when the strength of surrounding rock is strong, the thrust can be increased properly and the tunneling efficiency can be accelerated.
【學(xué)位授予單位】：中國水利水電科學(xué)研究院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U452.1
本文編號：2211644
[Abstract]:This paper mainly discusses two aspects about TBM: first, advance drilling engineering mechanics test. Two comprehensive field tests were carried out: both indirect test (borehole test, single hole acoustic test) and direct test (point load test, uniaxial compressive strength test). A large amount of geological information and rock mechanics information were obtained. The relationship between the parameters of drilling while drilling and the evaluation index of rock mass quality is established, so that the uniaxial compressive strength, size and underground distribution of rock block in front of the face can be quickly, effectively and quantitatively ascertained by advanced drilling. And the occurrence, extension, ups and downs, thickness and physical and mechanical properties of the interface. The second aspect, the surrounding rock construction characteristic fast appraisal system research. First of all, the TBM tunneling test is simulated by indoor granite drilling test, and the parameters such as rotation speed, torque, propulsion force, drilling displacement and so on are recorded by DPM system while drilling. At the same time, the concept of drilling specific energy is introduced in order to find a parameter to evaluate rock quality instead of drilling speed, and then return to the TBM tunneling test. Based on the massive field tunneling data and a large amount of engineering geological information, the parameters such as the rotation speed of the cutter head, the torque of the cutter head, the propulsion force and the propelling displacement are selected and analyzed by multi-element function fitting. Then the concept of driving specific energy is introduced and compared with the tunneling velocity under the condition of different strength classification surrounding rock. The main conclusions are as follows: (DPM) can record the parameters of rotational speed, pressure, torque, drilling displacement while drilling, and can directly reflect the strength characteristics of rock mass by drilling speed; But for the same rock, we should not only rely on drilling velocity to classify the surrounding rock, but also consider the additive effect of pressure and rotational speed. Compared with the tunneling speed, the tunneling ratio is less volatile and the error is smaller (10%), which has a good correlation with the criteria of rock classification, and can be used as the criterion of rock mass quality evaluation, and the smaller the surrounding rock strength, the smaller the surrounding rock strength. The greater the contribution of torque power (torque work) to the tunneling speed, the higher the driving speed can be if the strength of surrounding rock is weak, and when the strength of surrounding rock is strong, the thrust can be increased properly and the tunneling efficiency can be accelerated.
【學(xué)位授予單位】：中國水利水電科學(xué)研究院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U452.1
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