Shenyuan Geotechnical Engineering Co.

Shanghai, China

Shenyuan Geotechnical Engineering Co.

Shanghai, China

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Shui W.-H.,Shenyuan Geotechnical Engineering Co.
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

Dynamic compaction (DC) and dynamic replacement have become generally accepted ground improvement techniques for their simplicity and cost-effectiveness. But conception of DC and dynamic replacement still have a lot of disagreement. On some foundation treatment specification revision of opportunity, it is necessary to improve the dynamic compaction and dynamic compaction replacement concepts of clarification. The distinctions between DC and dynamic replacement are: with or without filler; with or without grained soil; rammer static grounding pressure is or not greater than 80 kPa and whether formatted replacement piers. Meanwhile according to the measured data of more than 68 projects, this paper proposes the relations of dynamic displacement pier length and the energy level (top achieve 18000 kN·m), for the first time in China. Also it makes form for engineering personnel reference.


Tang J.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

Based on a project close to sea in Xiamen, the common measures of waterproof curtain are introduced in deep excavation engineering. Under thick sandy layers and underground obstacles, the geological conditions of this project are quite complex, and the interlocking cast-in-situ piles are used. They work well except partial seepage. Experience in the project can be referred for the similar projects.


Liu Z.,Shenyuan Geotechnical Engineering Co. | Luo Z.-Q.,Shanghai Pudong Architectural Design and Research Institute Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

According to the details of a typical ultra-large deep excavation project, the key points in the design and construction of the semi-top-down construction method and some deformation-control measures in construction are introduced. In addition, the positions of the maximum deformation and the deformation rules are discussed according to the monitoring data. The relatated key points and the results of the design can be referred for similar projects.


Liang Z.-R.,Shenyuan Geotechnical Engineering Co. | Li Z.-C.,Shenyuan Geotechnical Engineering Co. | Liu J.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

Several strength tests are conducted in soil-cement piles mixed by triaxial stirring machine, including trials of drilling core of soil-cement mixed piles, trials of taking soil-cement grout, cone penetration tests, standard penetration tests and CPT, based on an actual engineering in Shanghai. The advantages and disadvantages of these tests as well as their applicability are summarized. An important suggestion is given of replacing trial of drilling core of soil-cement mixed piles with trial of taking soil-cement grout in order to avoid the larger discreteness strength loss in the trials of drilling core of soil-cement mixed piles. Comparative analysis is made between the trial results of taking soil-cement grout and those of drilling core by using the sampling device developed in the paper.


Liang Z.-R.,Shenyuan Geotechnical Engineering Co. | Li Z.-C.,Shenyuan Geotechnical Engineering Co. | Zhao J.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

Based on the improved elastic foundation beam method and the Ito's soil pressure theory, a deformation compatibility equation is established to study the calculation mode of the width of retained soil in mid-island construction method. A finite difference solution is given based on the ultimate resistance method. On this basis, the influences of different retain soil widths and reinforcements for retained soil of mid-island are analyzed. A comparison between the theoretical and measured values of an actual project is made to draw some useful conclusions.


Liang Z.-R.,Shenyuan Geotechnical Engineering Co. | Li Z.-C.,Shenyuan Geotechnical Engineering Co. | Liu J.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

A systematical analysis is made to the larger strength loss, lower strength value and larger discreteness in the trials of drilling core of soil-cement mixed piles are studied. According to the tests in practical engineering, the strength value and test method of soil-cement piles, which are in dispute problem at present are studied. It is presented that the strength tests are carried out on soil-cement piles by using the trial of taking soil-cement grout, based on standard curing and compressive strength tests. A sampling device of taking soil-cement grout is developed to obtain the deep cement grout of soil-cement mixed piles. The third generation sampling device is small, portable, fast, and efficient, by means of continual improvement. Based on practical engineering, a soil-cement grout trial is carried out using the sampling device, and the comparative analysis with the trial of drilling core of soil-cement mixed piles is made.


Su Z.P.,Shenyuan Geotechnical Engineering Co. | Su Z.P.,University of Wisconsin - Madison
Recent Advances in Environmental Vibration - Proceedings of 6th International Symposium on Environmental Vibration, ISEV 2013 | Year: 2013

The effect of curing time and compaction effect on cementitiously stabilized materials ( CSM) was studied using ultrasonic P-wave propagation. In general, the P-wave velocity increased with curing time. The trend between unconfined compression strength ( UCS) with dry density or compaction water content was the same as the trend with P-wave velocity measurements. For stabilized fine-grained soils, there was a peak in P-wave velocity coinciding with the maximum dry density. The P-wave velocity and constrained modulus were strongly correlated to the UCS for CSMs. A model for prediction of UCS was proposed. These test results provide insights for use of ultrasonic pulse velocity testing method for the determination of mechanical properties of CSM.


Li Z.-C.,Shenyuan Geotechnical Engineering Co. | Liang Z.-R.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

3D finite element method is adopted to analyze lateral deformation mode of soils in the free field state. On this basis, a computation model is set up to analyze passive piles subjected to adjacent surcharge loads. In the computation model, passive piles are divided into passive parts subjected to soil deformation induced by adjacent surcharge loads and active parts resulted from passive loads. The passive parts of passive piles are calculated according to the Itos soil pressure theory considering the layered soils and the arching effect of lateral displacement soils in passive parts. The active parts of passive piles are calculated according to the traditional method considering soil resistance. The bending moment and deformation of passive piles are solved based on the displacement compatibility differential equation by finite difference method. Finally practical calculation method brought forward is verified by an engineering example, in the paper.


Liang Z.-R.,Shenyuan Geotechnical Engineering Co. | Li Z.-C.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2015

Based on the vacuum preloading tests on site formation process of Shanghai Disneyland, the test results of surface settlement, layered sedimentation and pore water pressure are systematically analyzed. The influences on the settlement deformation and lateral displacement of the surrounding environment in the vacuum preloading tests are also analyzed. Some meaningful conclusions are drawn. ©, 2015, Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering. All right reserved.


Li Z.-C.,Shenyuan Geotechnical Engineering Co. | Liang Z.-R.,Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2011

Numerical model is adopted to simulate the soil arching effect of passive piles due to the lateral displacement of soil and some results of soil arching effect of passive piles are obtained. Based on the soil movement and stress transfer approach, soil pressure of the passive piles is calculated considering the soil arching effect at the passive side of piles and active wedge model at the active side of piles. Considering the real soil layer and soil arching effect in the passive side of piles and the stress transfer of pile shaft into the soil by means of dynamic strain wedge at the active side of piles, a global equilibrium equation is established and solved by use of the finite difference method. Finally, the proposed method is verified by an engineering example.

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