Sains Malaysiana 46(11)(2017): 2049-2059

http://dx.doi.org/10.17576/jsm-2017-4611-05

 Environmental Geological Features of the Red Clay Surrounding Rock Deformation under the Influence of Rock-Fracture Water

(Ciri Geologi Persekitaran Lempung Merah Mengelilingi Canggaan Batuan di bawah Pengaruh Retakan- Batuan Air)

JIADING WANG^1*, TIANFENG GU¹, JIANBIN WANG¹, YUANJUN XU¹, PENG CHEN¹

& MUHAMMAD AQEEL ASHRAF²

¹State Key Laboratory of Continental Dynamics, State Key Laboratory of Continental Dynamics

Northwest University, Xi’an 710069, China

²International Water, Air & Soil Conservation Society, 59200 Kuala Lumpur, Federal Territory

Malaysia

Diserahkan: 1 Februari 2017/Diterima: 4 Jun 2017

ABSTRACT

The development degree of fissure water in underground rock is a great trouble to the construction of railway tunnel, which will cause a series of environmental geological problems. Take the surrounding rock-section of the typical red clay in Lvliang-Mt. railway tunnel below the underground water level as an example, several aspects about the red clay surrounding rock will be researched, including pore water pressure, volume moisture content, stress of surrounding rock, vault subsidence and horizontal convergence through the field monitoring. Taking into account the importance of railway tunnel engineering, the large shear test of red clay was carried out at the construction site specially and the reliable situ shear strength parameters of surrounding rock will be obtained. These investigations and field tests helped to do a series of work: Three dimensional finite element numerical model of railway tunnel will be established, the deformation law of the red clay surrounding rock will be investigated, respectively, for the water-stress coupling effect and without considering it, the variation of the pore water pressure during excavation, the influence degree about the displacement field and stress field of water-stress coupling on red clay-rock will be discussed and the mechanism of the surrounding rock deformation will be submitted. Finally, the paper puts forward the feasible drainage scheme of the surrounding rock and the tunnel cathode. The geological environment safety of tunnel construction is effectively protected.

Keywords: Deformation features; environmental geological problems; railway tunnel; red clay surrounding rock; rock-fracture water

ABSTRAK

Tahap perkembangan rekahan air di dalam batuan bawah tanah merupakan masalah besar untuk pembinaan landasan terowong yang akan menyebabkan satu siri masalah geologi alam sekitar. Sebagai contoh, lihat pada bahagian batuan sekeliling tanah liat tipikal di terowong landasan Lvliang-Mt. di bawah paras air bawah tanah, beberapa aspek tentang tanah liat merah di sekeliling batuan akan diteliti, termasuk tekanan air pori, isi padu kandungan lembapan, tekanan batuan keliling, penurunan vault dan konvergensi mendatar melalui pemantauan lapangan. Dengan mengambil kira kepentingan kejuruteraan terowong keretapi, ujian ricih besar tanah liat merah dilakukan di tapak pembinaan khasnya dan parameter kekuatan ricih situ yang boleh dipercayai di sekitar batuan akan diperoleh. Kajian dan ujian lapangan ini membantu melakukan satu siri kerja: Tiga elemen dimensi terhingga unsur model terowong kereta api akan ditubuhkan, undang-undang canggaan tanah liat merah di sekeliling batu akan dikaji untuk tekanan gandingan tekanan air dan tanpa mempertimbangkannya, variasi tekanan air liang semasa penggalian, darjah pengaruh tentang medan anjakan dan tegasan gandingan tekanan air pada tanah liat merah akan dibincangkan dan mekanisme canggaan batuan di sekeliling akan dikemukakan. Kesimpulannya, kertas ini mengemukakan skim saliran yang sesuai di sekitar batu dan katod terowong. Keselamatan geologi alam sekitar untuk pembinaan terowong dilindungi dengan berkesan.

Kata kunci: Air batu-pecah; ciri ubah bentuk; landasan terowong; masalah geologi alam sekitar; tanah liat merah di sekeliling batu

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*Pengarang untuk surat-menyurat; email: wangjd@nwu.edu.cn