1. Open the top of the passioncoffe At present in our country, there are wall reinforcement using geotextile material (Geosynthetic-reinforced soil retaining wall) are used in many different fields in the building as the building construction in the municipality, strengthening of weak soils ... With steep vertical roof structure, effectively the economy high, the aesthetic value is especially resistant to high tremor, it really is the appropriate solution alternative to classic wall structure in construction, particularly in municipalities with high aesthetic requirements and limited construction area. Da Nang, too, is the major tourist centers of the country, with so many resot, coastal urban area is built around the son TRA peninsula, the solution there are reinforced wall is the choice of many investors, the design consultant when substituting classic wall. With solutions designed wall is in steep roof stability in Hawthorn, Mecure works team would like to give a lesson in glass designers work, roof slope stability calculation had reinforced wall has used local materials with technical help Geoslope software , Plaxis, Excel in Vietnam does not yet have legal conditions in the core wall construction design.2. Basis of calculation theory of roof slope stability2.1 theory of roof slope stability calculation according to the Slope and Plaxis [1] [5] [6] [8]Slope/W software 2004 use of the theory of balance of power and torque limit to computers safety factor against deep sliding. Safety coefficient (Factor of Safety, FS, the equation 2.1) is defined as the ratio of the magnetic moment slip with sliding magnetic moment (Abramson et al. 2002). Limit equilibrium theory (Limit Equilibrium Theory) was applied to determine safety coefficient with sliding surface of circular cylindrical hypothesis. (2.1) Bishop method is used to determine the coefficient of stability, FS. Bishop methods based on classical defragmentation method considering interaction between the pieces (Das) and stable coefficient, FS, is determined according to the equation (2.2) (2.2) In which: c-adhesive force, friction angle in-, w-weight of each piece, b-the length of each piece along the bow to slide, u-pore water pressure, the -angle of each piece. FS coefficient is determined according to (2.2) to ensure greater than or equal to 2.3 to achieve design requirements) Stable coefficient determined by the finite element method is defined based on the relationship stress at a point, is the ratio of the shear strength, shear, and f , , due to the load-induced in the ground at a points (2.3 equation) (2.3) Or (2.4) Among them:,. PLAXIS software determine the coefficient of FS with repeated trial and error with changed FS to achieve balance in the equation (2.4) when the stress due to the load cause at a location to be determined (Brinkgreve et al. 2006). In this method the tan and c be shortened according to the formula (2.5) (2.5) In which: c and is the real intensity parameters; CR and r is reduced intensity parameters. The shortened process are controlled by parameters. This parameter increases each bườc until the vandalism occurred. Safety is at the time of value disruptive. 2.2 payment of computation theory the wall according to the British and American legal MSE [3] [7]The sequence of calculations according to your rules (BS8006-1995) and America (FHWA-NHI-00-043) are summarized by the following sequence:Step 1: determine the number of the original basic design data:1. Choose the design process: BS8006-1995 or FHWA-NHI-00-043.2. Determine the height of the wall, H; The preliminary mesh length, L (L H L, 0.7 3 m)2. Select the distance between the reinforcement layer, Sv.3. Density r, reinforced earth packed; the angle of friction in , r; power stick, cr.4. Density Earth packed behind the wall, d; the angle of friction in , d; power stick, cd.5. soil density land, f; the angle of friction, f ; power stick, cf.6. Determine the load on top of the wall, q.7. Calculate the required core length.Step 2: calculate the lateral stability of land mass is: 1. Check the reinforcement was not far behind the anchor.2. Next is not broken.Step 3: check the stable master:1. Check the flip.2. Check the horizontal slider.3. check your load in the background.4. Check the right slide overall. With each calculated height H in position 3 cross-section. The author has created a spreadsheet using Excel software (in the appendix). Private stable overall checking is done by the software Geoslop and Flaxis.3. The application calculate Hawthorn Mecures project [4]3.1. project introduction The project RESORT MERCURE Camellia is the Resort built in the ears at the Trem, Camellia. The investor of the project is the company General Services joint stock company (SAVICO). The project has a total area of 5.7 hectares, including a 4-star hotel with 120 rooms and 22 villas of high-end, with a total investment cost of us $ 20 million. Figure 3.1. Mecure project perspective Camellia3.2. structural solutions have reinforced wall Layout categories have reinforced wall in three places before parking, front terrace of the hotel, with two tennic form mostly wall bending and bundle block (Figure 3.2, 3.3). Figure 3.2. Typical cross-section wall piece before hotels Figure 3.3. Detailed cross-section wall tiles piece Block Causeway H1 = 3 m GEO grid 1 2 shaft type: bottom layer type 4, 5 4 next class used type 1, the distance between the grid layer is 0.4 m. Inside the reinforced grids are offset by land avail with K ≥ 0.95. The bottom 10 cm thick, Geocell used to pour rubble into compacted inside and hit the coefficient K ≥ 0.95, below the non woven geotextile liner TS20. The rear surface of the wall is the class levels of drainage gravel 0.3 m thick, are separated from the soil by the layer non-woven geotextile TS20. Wall surface using tile Block KT (20x20x40) cm and placed on concrete foundation beams f'c = 25Mpa, KT (60x45) cm.4. Results and discussion The steps of calculations in cross-sectional position 3 is shown in the table in the Appendix of articles and three cross-section of authors have used the software to calculate the Plaxis and Geoslope safety FS at the location of the corresponding cross-section results shown in Table 4.1 Table 4.1. The coefficient of the corresponding cross-section 3 FS software Geoslope and Plaxis Location FS (Kmin) MCN parking places 1,659 1,588MCN tennis 1,987 1992MCN hotels 1,815 1,698 According to the standard 22 BC 171-1987, the safety coefficient coefficient FS allows is [FS] = 1.3. Based on the results of the analysis is the position of all three sections are to ensure stability. Hệ số ổn định FS của các phần mềm tính toán Geoslope và Plaxis gần giống nhau, sai lệch nhỏ. Plaxis là phần mềm dựa vào lý thuyết cân bằng giới hạn nên độ chính xác cao nhưng đòi hỏi số liệu đầu vào phước tạp và chính xác, khi biến dạng trượt quá lớn dẫn đến tương thích biến dạng bị vi phạm. Với điều kiện kinh phí, thiết bị khảo sát thí nghiệm còn hạn chế ở nước ta hiện nay, phần mềm Plaxis không được áp dụng nhiều. Với Geoslope/W là phần mềm đơn giản, yêu cầu đầu vào ít và được áp dụng rộng rãi nhưng độ chính xác và hội tụ phụ thuộc vào chủ quan của người lập mô hình, là phương pháp tính cổ điển, không quan tâm ứng suất và biến dạng.4. Kết luận Giải pháp tường chắn có cốt có sử dụng vật lieu địa kỹ thuật rất phù hợp với điều kiện của bán đảo Sơn Trà bởi tính thẩm mỹ và kinh tế cao vì tậnd dụng được vật liệu đắp tại chổ nên có khả năng được ứng dụng rộng rãi tại khu vực này. Khi tính toán thiết kế tường chắn có cốt MSE việc kiểm tra ổn định tổng thể phụ thuộc rất lớn vào kinh nghiệm người thiết kế nhất là vị trí có mặt cắt phước tạp như mặt cắt tại vị trí trước khách sạn với nhiều chiều cao tường chắn khác nhau (Hình 3.2). Người thiết kế phải kiểm tra ổn định tổng thể với nhiều cung trượt nguy hiểm ở nhiều vị trí khác nhau để tìm ra vị trí mặt trượt nguy hiểm nhất nhằm kiểm tra tính ổn định của công trình. Kết quả tính toán cho thấy, tại vị trí mặt cắt trước khách sạn tác giả đã sử dụng 3 cung trượt khác để kiểm tra ổn định tổng thể tại vị trí mặt cắt này. Kết quả này đã mô phỏng đầy đủ và dự đoán chính xác những cung trư
đang được dịch, vui lòng đợi..