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Li H.-B.,Huazhong University of Science and Technology | Li H.-B.,China Communications Construction Company Ltd. | Dai Y.-H.,CAS Wuhan Institute of Rock and Soil Mechanics | Song J.-H.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Fu K.-J.,Headquarters of Yichang Badong Highway Construction of Hubei Province
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

According to the characters of high geostress soft rock, in-situ stress test, crown settlement and convergence, contact stress, and structural stress monitoring are performed for Xiakou tunnel of Yichang-Badong highway in Hubei province. The in-situ stress test results show that the geostress is very high even if the embedded depth is not too large. The monitoring results also show that the deformation and structure stress of the high geostress soft rock tunnel, is closed related with the excavation way, distance to the working face, and supporting time, appearing in obvious time-space effect. After the working face's past, the rock surrounding's extrusion deforming and structure stress increases continuously due to the rheology of soft rock mass under high geostress, eventually leading to the instability of surrounding rock mass and failure of the supporting system. Based on the research results above, the supporting design countermeasures of the tunnel with high geostress and large deformation are put forward. The research results provide the basis for Xiakou tunnel's construction and supporting design; and are valuable value to the high geostress soft rock highway tunnels in western China.


Liu C.-G.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Xie Q.-M.,Wuhan University of Technology | Zeng Y.,Communications Planning and Design Institute of Huhei Province | Yang W.-D.,Wuhan University of Technology
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2013

Talus slope is a kind of typical geo-hazard. Along the Yiba highway it crosses up to dozens of complicated geological conditions of talus slope which lead to a severe test to the construction and operation of the Yiba highway. To this end, we take the typical Sanlihua talus slope at Yiba highway as the research object to study on formation mechanism and failure mode of talus slope by considering the combined effects of formation lithology, embankment slope, climate change and other various factors. The formation of Sanlihua talus slope is due to the reason of the large area of strong crustal uplift in Quaternary neotectonic movement which causing a severe undercut of the river along with making the height difference of the valley up to several hundred meters that finally appearing a free face on the natural hillslide. In the process of formation, within the power induced differences in topography and provided the material basis for the formation of the talus slope. On the other hand, the exogenic role made a further transformation of the surface morphology of the talus slope which changed its geological structural. The Sanlihua talus slope exists two possible failure modes of shallow instability (or local instability) and deep instability (or overall instability). These research conclusions provide the important basis for the stability evaluation, design and construction of the control measures of the talus slope at Yiba highway.


Zhang X.-L.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Ke D.,Wuhan University of Technology | Li B.-X.,Wuhan University of Technology
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2013

Gypseous rocks as aggregate may result in internal sulphate attack (ISA) of concrete. The effects of C3A content, alkali content of cement, mineral additives, water-binder (w/b) ratio and curing temperature on ISA of the gypseous aggregate concretes were investigated by the expansion ratio and strength tests. Results show that the C3A content less than 5% did not cause the harmful expansion of the gypseous aggregate concrete, but the expansion damage was promoted when the C3A content is as high as 8%; the decrease of cement alkali content and the addition of 8% silica fume, 15% meta kaolin or 20% fly ash improved the ISA of the gypseous aggregate concrete, but the addition of 30% ground granulated blast furnace slag boosted the ISA of the concrete; the high w/b ratio delayed the early expansion, and the high curing temperature increased the ISA rate of the gypseous aggregate concrete.


Shen S.-R.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Zeng F.-C.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Xie Q.-M.,Wuhan University of Technology | Zeng Y.,Communications Planning and Design Institute of Huhei Province | Han B.,Wuhan University of Technology
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2013

Talus slope prevention often has some alternative treatment scheme, and the decision of treatment schemes of slopes is the comprehensive judgment with multi-objective and multi-hierarchy. So this article puts forward a optimization method for the treatment scheme of talus slope in the mountain area highway, which use the optimal transfer matrix to improve conventionally analytic hierarchy process and make it naturally meet the requirement of identity, so the identity test is not needed. As an example, the method is applied to Sanlihua talus slope prevention at the Yiba highway, and the methods of prevention and control in the optimization of treatment schemes of talus are detailedly discussed.


Zhu S.-Y.,Wuhan University of Technology | Zhang Z.-P.,Wuhan University of Technology | Wang H.,Wuhan University of Technology | Liu B.,Wuhan University of Technology | Zhu H.-J.,Headquarters of Yichang Badong Highway Construction of Hubei Province
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2014

For the purpose of research on the effects of edge rate bars' temporal frequency and angle on deceleration, road experiments were carried out with four angles (30, 45, 135 and 150 degrees). Data were analyzed by the with and without comparison method and the reusable two-factor analysis of variance. The results show that the average speed, 85% speed and standard deviation of speed respectively decrease by 7.68, 10.14 and 1.58 km·h-1, and the decreases are greatest when the angle is 150 degrees in the four experiments. The distribution range of deceleration is within [-0.25, -0.49] m·s-2 when the driver takes the greatest deceleration. The greater the angle and the temporal frequency are, the more significant the deceleration is. The temporal frequency and angle have synergetic mutual function in the impact on the deceleration.


Liu J.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Zeng F.-C.,Headquarters of Yichang Badong Highway Construction of Hubei Province | Cai L.-H.,Wuhan University of Technology | Wang Z.-X.,Headquarters of Yichang Badong Highway Construction of Hubei Province | And 2 more authors.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2012

Aiming at the preparation of bridge pile foundation concrete in acidic water environment, the effect of mineral admixtures, water-binder (w/b) ratio and pH value of erosion environment on acid resistance of concrete is studied. Cement is replaced by fly ash (FA) with the incorporation amount from 20% to 50% or by ground granulated blast-furnace slag (GGBS) from 35% to 65%. The w/b ratio is 0.35, 0.39 and 0.43 respectively. The acidic environmental conditions are simulated by using sulfuric acid solution with the pH value 1, 2 or 4. The corrosion process was monitored by measuring the compressive strength for a period of one year. The results showed that a reduce in the w/b ratio improved the acid resistance of concrete. It was found that the improvement effect of mineral admixture on acid attack of concrete is dependent on the type and dosage mixture admixture and the pH value of simulation erosion solution. The high volume fly ash concrete mixtures performed better than high volume ground granulated blast-furnace slag concrete mixtures.

Loading Headquarters of Yichang Badong Highway Construction of Hubei Province collaborators
Loading Headquarters of Yichang Badong Highway Construction of Hubei Province collaborators