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一、前言铜川煤炭基建公司第三工程处张桥基地(以下简称张桥基地)在筹建过程中,由于周围没有建筑经验可供参考,因而由三处与陕西省煤矿设计研究院组织,邀请建工局建研所与西安冶金建筑学院参加,组成三结合试验小组,自1974年9月起对该场地黄土地基开展了室内外试验工作。试验目的是为了进一步查明该场地黄土的湿陷性质、湿陷起始压力以及湿陷变形规律,从而为该场地地基处理方案提供科学依据。张桥基地位于西韩铁路线北侧25米,东距张桥车站约一公里,西距阎良车站19公里,地处富平、蒲城、渭南、临潼四县交界处,属富平县华阳公社。该场地绝对标高在410～413米之间。试验场地在基地东北侧,标高在412～413米左右,各试验点平面位置见图1。整个场地地形比较平坦,自东北向西南略呈1～2%的坡度,原为农田,紧靠基地北、东
I. INTRODUCTION The Zhangqiao Base of the Third Engineering Office of Tongchuan Coal Infrastructure Construction Company (hereinafter referred to as the “Zhangqiao Base”) has not been provided with architectural experience for reference during the preparation process. Therefore, it is organized by the 3 Coal Mining Design and Research Institute of Shaanxi Province. The Bureau of Industry Research and Engineering and the Xi’an Metallurgical Construction College participated in the trial and formed a three-combination experimental group. Since September 1974, the indoor and outdoor test work on the loess ground has been carried out. The purpose of the test is to further ascertain the collapsibility of the loess, the initial collapse pressure, and the collapsible deformation law of the loess at the site, so as to provide a scientific basis for the foundation treatment plan of the site. Zhangqiao Base is located 25 meters to the north of the West Rail Line, 1 kilometer to the east of Zhangqiao Station, and 19 kilometers to the west of Yanliang Station. It is located at the junction of Fuping, Pucheng, Weinan and Linyi counties and belongs to Huayang in Fuping County. commune. The absolute elevation of the site is between 410 and 413 meters. The test site is on the northeast side of the base and the elevation is about 412 to 413 meters. The plane position of each test point is shown in Figure 1. The terrain of the site is relatively flat, with a slope of 1 to 2% from northeast to southwest. It was originally a farmland and was close to the north and east of the base.