【導讀】基承載力的要求。20世紀80～90年代，由于人口膨脹土地資源日益緊張，同時。地基中常見的軟土，一般是指處于軟朔或者流朔狀態(tài)下的粘性土。程地質(zhì)性質(zhì)，工程地質(zhì)條件較差。發(fā)生路基失穩(wěn)或過量沉陷。其危害性顯而易見,故禁止采用。一般地，除要確保新填筑路基的密實度以減少沉降外，包括原地面。軟土地基沉降嚴重時，不僅增加填方數(shù)量，而且沉降或水平位移對臨。會產(chǎn)生很大的影響。為此，根據(jù)地基土的工程特性，選用適當?shù)奶幚泶胧?。?jīng)過長期的實踐，在公路、好的中粗砂)稱為換填或墊層法。土層厚度過大，則采用換填法會增加棄方與取土方量而增大工程成本。代表方法有砂墊層法及換填法。弱土體進行振密和擠密的地基加固方法稱為深層密實法。使土中的孔隙水(氣)順利排出，土體迅速固結(jié)。大孔隙水壓力增量與夯擊次數(shù)關(guān)系來確定最佳夯擊能。長，超載預壓的時間一般為6個月，通常與排水處理地基相結(jié)合使用。括粘性土和砂層.堆載預壓時間從1995年到2020年,大約7~8年.

　　

【正文】 e method. Preloading: divided into the surcharge preloading, set Preloading and less preloading, the construction process is simple, but a longer duration, surcharge preloading time is generally six months, usually used in conjunction with wastewater treatment foundation . New kiln South Road, Guangzhou City, road works is to use a heap load reinforcement of soft soil roadbed. New kiln South Road road works starting point for Guangzhou Avenue K4, +600, and finish at North Village K11, to +700, total length of about 7KM road along the stratigraphic architecture were as follows: the crust hard shell loose, miscellaneous fill, fill factors, and soft plastic like cultivated soil, thickness of to 。 soft layers including the flow of plasticlike silt and silty soil, thickness of ~ , along thickness variation。 underlying layer of cohesive soil and sand heap preloading time from 1995 to 2020, about 7 to 8 years. Packed sand: soft soil subgrade for soft soil thickness, embankment stability, high filling, packed sand, increase the soft soil the vertical drainage capacity, shorten the horizontal direction of the drainage distance, accelerate the soft soil strength. Sand bags poured into the sand, sand wells can be used to hammering or vibration method of construction. Complexity of its construction process, the relatively high cost, used for a long time, can be rectangular or plumshaped cloth pile. Geological Survey of the Pearl River area of a city road show that the foundation soil is more evenly distributed, surface 0m about Cultivate soil, then a thick high water content, high pression, lowintensity, high content of viscous superweak sludge. The third layer is thick and shell powder sand。 the fourth floor and thick silty clay。 thick clay and thick silty sand. Down for the blow count (SPT) is greater than 19 hit pebbly coarse sand layer, and then down the soil better. The foundation soil is about 20m deep mud, up to % moisture content, vane shear strength is only 4Kpa and silt distribution depth of roughly inclined by the former direction of the rear land, the former light after the dark, in front of a relatively favorable. Roads need such a large area of very soft silt foundations for the deep processing of soft foundation to prevent the construction of soft foundation settlement is slow, cause there is still a large residual settlement after the pletion of the project, at the same time not cause damage to the foundation instability due to load . This area due to improper soft foundation engineering quality or safety incidents is more mon, the design Ф7cm packed sand plus sand cushion heap load Preload soft Reinforcement by playing set the sand well Second, after the consolidation of the fourstory mud soil drainage, the soil strength improved, reducing the settlement after the project put into operation, to ensure the normal use of the project to meet project design requirements. Plastic Drainage Board: Drainage Principles and packed sand factory production, its quality is stable, light weight, easy transportation and storage, construction techniques are relatively simple, less investment in labor, relatively low cost, and percolation water absorption , has a certain strength and elongation, soil disturbance is small, preloading a long time, been widely used in engineering, but improve the soil39。s shear capacity than packed sand.