發(fā)布時間：2018-04-15 19:47

  本文選題：高等級公路 + 路基碾壓　； 參考：《天津大學》2014年碩士論文

【摘要】：路基壓實質量是影響高等級公路長期安全穩(wěn)定運行的關鍵。常規(guī)高等級公路施工主要依靠監(jiān)理和施工人員人工控制壓路機碾壓過程，由于受人為因素干擾，往往易于造成管理較粗放、漏壓、欠壓和超壓等問題，難以確保施工質量。此外，對路基壓實質量的檢驗和評價通常以驗收時的挖坑取樣為判斷依據(jù)。但是，用有限的試驗點去評估整個工作面的壓實效果往往會存在較大偏差，不能真實反映整個工作面的壓實質量。同時，這種檢驗方法一方面會對工作面施工作業(yè)帶來干擾，，另一方面由于實驗結果無法快速獲得從而影響施工進度，且難以實現(xiàn)對壓實質量的實時反饋。因此，有必要結合高等級公路路基碾壓施工的特點，研制開發(fā)路基壓實質量的實時監(jiān)控系統(tǒng)，這對于確保路基施工質量、實現(xiàn)施工質量的實時評估和及時反饋控制具有重要的理論與現(xiàn)實意義。本文主要研究內(nèi)容和成果如下： （1）針對高等級公路路基碾壓質量控制的要求，設計了路基壓實質量實時監(jiān)控系統(tǒng)的總體框架和主要功能，利用GPS技術、GPRS技術和計算機網(wǎng)絡技術，在課題組已有成果的基礎上，研制開發(fā)了該系統(tǒng)，實現(xiàn)了路基碾壓過程中對壓路機碾壓軌跡的精細化控制，以及對壓路機振動頻率和路基壓實效果的實時監(jiān)測，克服了常規(guī)施工過程中人為粗放管理控制的弊端，可確保路基碾壓施工質量。 （2）基于研發(fā)的高等級公路路基壓實質量實時監(jiān)控系統(tǒng)，分析了壓實監(jiān)測值（CV值）同常規(guī)壓實質量表征指標（壓實度、路基動態(tài)彈性模量）之間的相關性，得出了CV值與常規(guī)壓實質量表征指標之間具有強線性相關性的結論，為評估模型的建立提供了依據(jù)。 （3）建立了基于CV值的高等級公路路基壓實質量評估模型，包括基于CV值的路基土料壓實度評估模型和基于CV值的路基動態(tài)彈性模量評估模型，可用于快速評估碾壓過程中的路基壓實質量。 （4）提出了公路路基全工作面壓實質量快速評估方法。根據(jù)實時采集的CV值及建立的路基壓實質量評估模型，利用Kriging空間插值技術，可計算獲得施工全工作面中任意位置處路基的壓實質量，進而分析施工質量合格率，該方法可有效避免事后抽檢方法的片面性和滯后性，為高等級公路路基壓實質量的實時控制提供了一條新的途徑。
[Abstract]:The quality of roadbed compaction is the key to the long-term safe and stable operation of high-grade highway.The general high-grade highway construction mainly relies on the supervision and the construction personnel to control the compaction process of the roller manually. Because of the interference of human factors, it is easy to cause the problems of extensive management, leakage pressure, underpressure and overpressure, so it is difficult to ensure the construction quality.In addition, the test and evaluation of subgrade compaction quality is usually based on excavated sampling during acceptance.However, the compaction effect of the whole working face can be evaluated by limited test points, which can not truly reflect the compaction quality of the whole working face.At the same time, on the one hand, this method will interfere with the construction work of the working face, on the other hand, because the experimental results can not be obtained quickly, the construction progress will be affected, and it is difficult to realize the real-time feedback on the compaction quality.Therefore, it is necessary to develop a real-time monitoring system for roadbed compaction quality in combination with the characteristics of high-grade highway roadbed compaction construction, which can ensure the subgrade construction quality.It is of great theoretical and practical significance to realize real-time evaluation and timely feedback control of construction quality.The main contents and achievements of this paper are as follows:1) according to the requirement of rolling quality control of high grade highway subgrade, the overall frame and main functions of the real time monitoring system of roadbed compaction quality are designed. The GPS technology and computer network technology are used, and on the basis of the existing achievements of the research group, the main functions of the real time monitoring system for the subgrade compaction quality are designed.The system is developed to realize the fine control of roller track during roadbed compaction, and the real-time monitoring of roller vibration frequency and embankment compaction effect.It overcomes the disadvantages of artificial extensive management and control in the conventional construction process, and can ensure the quality of roadbed compaction construction.Based on the real-time monitoring system of high grade highway roadbed compaction quality, the correlation between compaction monitoring value and conventional compaction quality index (compaction degree, dynamic elastic modulus of roadbed) is analyzed.The conclusion that there is strong linear correlation between CV value and conventional compaction quality index is obtained, which provides a basis for the establishment of evaluation model.The evaluation model of compaction quality of high grade highway roadbed based on CV value is established, including the evaluation model of compaction degree of subgrade soil material based on CV value and the evaluation model of dynamic elastic modulus of roadbed based on CV value.It can be used to evaluate the compaction quality of roadbed.Finally, the paper puts forward a method to evaluate the compaction quality of the whole working face of highway roadbed.According to the CV value collected in real time and the evaluation model of roadbed compaction quality, the compaction quality of roadbed at any position in the whole working face can be calculated by using Kriging space interpolation technology, and the qualified rate of construction quality can be analyzed.This method can effectively avoid the one-sidedness and lag of the post-test method, and provides a new way for the real-time control of the compaction quality of high grade highway subgrade.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.1

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本文編號：1755523