Luận văn thạc sĩ Địa kỹ thuật xây dựng: Ứng dụng trụ đất xi măng để xử lý lún lệch giữa đường và mố cầu công trình: Cầu Bốn Tổng, Cần Thơ

For land located in Can Tho City, the most suitable cement content for soil treatment is 15% equivalent to 220 kg of cement for 1m3 of natural soil with a single compressive strength of

TRƯỜNG ĐẠI HỌC BÁCH KHOA

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NHIỆM VỤ LUẬN VĂN THẠC SĨ

Họ tên học viên : Lê Cơng Bình Phái : Nam

Ngày, tháng, năm sinh : 16/ 05 / 1992 Nơi sinh : TP Cần Thơ

Chuyên ngành : Địa kỹ thuật xây dựng MSHV : 1770121

V - HỌ VÀ TÊN CÁN BỘ HƯỚNG DẪN ( Ghi đầy đủ học hàm, học vị ) :

PHÓ GIÁO SƯ x TIẾN SĨ VÕ PHÁN

Nội dung và đề cương luận văn thạc sĩ đã được hội đồng chuyên ngành thông qua

Tp.HCM, Ngày tháng năm 2019

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ABSTRACT

APPLICATION OF SOIL CEMENT PILES IN HANDLING SUBSIDENCES IN MIDDLE ROAD AND BRIDGE ABUTMENT:

BON TONG BRIDGE, CAN THO.

In the recent years, in the Mekong Delta general, in Can Tho areas particular, one of the problem of road network is the unequal settlement between the approach roadway and bridge abutment on soft soil Characteristics of the soil are very small shear, compression major subsidence and small permeability Soil cement pile is one of the most effective and economical treatment for this problem This paper presents the structure, perspective calculate soil cement pile and geotextile and thereby provide treatment difference settlement kept approach roadway and abutments In addition, the present transmission mechanism of soft soil reinforcement method soil cement pile The actual calculation applied to the approach roadway Bon Tong bridge, checked by simulation approach roadway using PLAXIS 2D software

According to the study, the single compressive strength of the soil sample was improved after being treated by cement mix Most cement mixes have a higher compressive strength

as the cement content increases However, according to the results of the cement mortar test, it was found that when the cement content increased by more than 13%, the rate of increase of the single compression strength decreased markedly

For land located in Can Tho City, the most suitable cement content for soil treatment is 15% (equivalent to 220 kg of cement for 1m3 of natural soil) with a single compressive strength of 975 KN/m2 at 28 days and is about 40 to 50 times greater than the compressive strength of the whole soil

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ϰ͘ϯ͘ϱdşŶŚƚŽĄŶůӌĂĐŚҸŶǀңŝĜҷĂŬӎƚŚƵҨƚŐŝĂĐӇӁŶŐĐŚŽĐңĜŽҢŶĜӇӁŶŐĚҧŶ 83

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