Owing to the overburden being thicker at chainages 0+200.00～0+280.00 m(El.810～El.950 m) at the right side of slope for Zipingpu water control project,the slope is designed to be reinforced by anti-slide piles,and it has achieved good effect for the stability of slope.

The fixed NH + 4 capacity of all natural layers in lou soil was determined in this thesis,they were 482.2±10.4,1134.9±4.0 and 553.0±11.3 mg N/kg soil in overburden layer,claying horizen and loess parent material horizen respectively.

(4)The optimizing design ratio of spandrel groove high slope is recommended as 1:0.25 in the fresh rock mass or weakly weathered rock mass(lower band), 1:0.35-1:0.50 in the weakly weathered rock mass (upper band), and 1:1.25 in the overburden.

Analyzing the character of hydrologic and silt of Xincheng Yellow River bridge, the stream design discharge is determined to be 6 500 m3/s, stream mean velocity to be 3.98 m/s, scour rate of main current to be 1.39, average grain diameter of bed overburden layer to be 30 mm;

Result from the study shows that the Quaternery overburden in the surveyed area is 600 m, and the 4 refraction interfaces respectively listed as P1、P2、P3and P4 are observed in the depth range above 400 m.

Compared with the results of conventional core analysis, under reservoir conditions (net overburden pressure>20MPa), porosity decreases about 3% to 10%, permeability increases about 12% to 70%.

logρv can be decreased as the increase of Vorganosilicon and mE－20. ΔR/R of thin film resistors coated with coating obtained under optimizing conditions were 0.5% and 0.25% respectively after water boiling and overburden test.

New data have been obtained by tracing and observations of the characteristics of faults F7(8) and F201, overburden stripping and fault gouge dating in the Daliushu dam region, which verify that fault F201 is a regional seismogenetic fault that has been very active since the latest Pleistocene and Holocene, and determine the existence of left-lateral strike-slip motion for fault F7(8).

In addition, by measuring only the higher energy muons of the air shower, the lowest energy muons being filtered out by the rock overburden, the data is sensitive also to the studies of the upper parts of the air shower.

The new mode sustains steep slope mining, increases the angle of ultimate slope, and reduces invalid overburden amount of rock by 3%-5%.

When extrapolating within the overburden, a stable wavefield continuation algorithm in combination with a stabilization factor is applied.

This avoids accumulating inverse Q-filter errors within the overburden.

Where the difference between pressure of fluids and the overburden pressure exceeded greatly the competence of the rocks, fluid junctions occurred and the velocity of the fluid flow increased as a result.

During the past several years, an investigation of the earth's crust using seismic reflection method has been carried out in Eastern Chai Dam Basin and Kansu. At the distances of 40—100kms from the shot point, ordinary reflections from the deep boundaries in the earth's crust can be identified. Apart from these ordinary reflections, another kind of phases with different properties have been discovered. Their apparent velocities are noticeably greater than that of the ordinary reflections. Their apparent velocities...

During the past several years, an investigation of the earth's crust using seismic reflection method has been carried out in Eastern Chai Dam Basin and Kansu. At the distances of 40—100kms from the shot point, ordinary reflections from the deep boundaries in the earth's crust can be identified. Apart from these ordinary reflections, another kind of phases with different properties have been discovered. Their apparent velocities are noticeably greater than that of the ordinary reflections. Their apparent velocities do not change regularly with distances. Their travel time curves intersect with the ordinary reflections and disappear suddenly at a distance of about 80—90 kms from the shot point. From their properties, it can be shown that a high velocity imbedded layer with continuously increasing velocities must exist in the earth's crust of these regions. The calculated parameters of this high velocity layer in these two regions are: Kansu Eastern Chai Darn Basin Total thickness of overburden layers 18.8 kms 30.5 kms Average velocity of overburden layers 5.5 km/sec 5.3 km/sec Thickness of high velocity layer 6.0kms 3.2kms Velocity of high velocity layer 7.5—8.5km/sec 7.5—8.0km/sec Both the upper and lower boundaries of this high velocity layer are shown to have good reflectivity, and are apt to produce multiples. The parameters of succeeding layers in the earth's crust can be calculated from their corresponding reflection arrivals. The depths of Mohorovii discontinuities from the earth's surface are calculated to be 51 and 52 kms in Kansu and Eastern Chai Dam Basin respectively. It is also argued that if this high velocity layer as discovered in Northwestern China exists extensively in the continental earth's crust, the scatterly distributed velocities of P~* and the mechanism of propagation of Lg waves can be more properly explained.

By use of the teleseismic P arrival times at 15 stations of Beijing network for 120 events distributing over various azimuths, we studied the three-dimensional P velocity structure under Beijing region. In calculating the theoretic traver-time we adopted the soure parameters given in BISC, and used the J-B model as the stan-dard model of earth. On inversion, we a dopted singular value decomposition as a generalized inversion package, which can be used for solving very large over-deter-mined system of equations...

By use of the teleseismic P arrival times at 15 stations of Beijing network for 120 events distributing over various azimuths, we studied the three-dimensional P velocity structure under Beijing region. In calculating the theoretic traver-time we adopted the soure parameters given in BISC, and used the J-B model as the stan-dard model of earth. On inversion, we a dopted singular value decomposition as a generalized inversion package, which can be used for solving very large over-deter-mined system of equations Gm = t without resort to normal equations GTGm = GTt. The results is that within the crust and upper mantle under Beijing region there are clear lateral differences. Thers the results obtained by use of data 1972-1975, it can be seen that there are three different zones of P-velocity. In the south-east of Beijing region, P velocity is lower than that of the normal model by 10-14% within the crust, and by 8-9% within the upper mantle. The north-west of Beijing region is a higher-velocity zone, within which the average P-velocity is faster than that of the normal model by about 9%. It disappears after entering into the upper mantle. The central part of this region is a normal zone. On the surface, the distri-bution of these P velocity variations corresponds approximately with the distribution of the overburden. But. in the deeper region, the distribution of velocity variation agrees with the distribution of seismicity. It is interesting to note that the hypo-centers of several major earthquakes in this region, e.g. the Sanhe-Pinggu earthquake (1679, M = 8), the Shacheng earthquake (1730, M=63/4 and the Tangshan earth-quake (1976, M = 7.8) are all located very close to this boundary of these P-velocity variation zones.

This paper based on the results of observations of box foundations for four multi-storied buildings in shanghai, ranging from 10 to 12 stories, is divided into three parts. The first part deals with the deformation properties of foundation soil during the following three stages:(a) When the foundation pressure increased from unloading condition (due to excavation) to the orignal overburden pressure, (b) When the net foundation pressure increased from zero to its maximum value and (c) When the foundation...

This paper based on the results of observations of box foundations for four multi-storied buildings in shanghai, ranging from 10 to 12 stories, is divided into three parts. The first part deals with the deformation properties of foundation soil during the following three stages:(a) When the foundation pressure increased from unloading condition (due to excavation) to the orignal overburden pressure, (b) When the net foundation pressure increased from zero to its maximum value and (c) When the foundation pressure was kept constant (after the construction). In this part a tentative method for calculating settlements of deeply embedded box foundations is also presented. The second part discusses the characteristics of the foundation pressure distribution and the method for computing pressure distribution is proposed.The last part presents the effects of temperature on the measurement of stress in reinforcements, and also the method for estimating stress in box foundations.