地质资料翻译-中英对照
3.特殊地质体的空间分布
田湾核电站扩建工程特殊地质体在田湾核电站施工之前的地表地质工作中未能发现。厂址附近1：5万地质填图、田湾核电站可行性研究阶段1：2000工程地质测绘和田核一期工程的1：1000工程地质测绘，在地表均未发现该地质体的踪迹，1978年拍摄的大比例尺航片上也没有影像直接显示。由于田湾核电站进行的土石方开挖，特殊地质体得以出露到现地面。
3.1特殊地质体的平面展布
3.1.1在3＃核岛场地内的展布
扩建工程详勘工作中，203、214、220、220-1和220-2等5个钻孔发现了破碎带，这5个钻孔基本在一条直线上（图3-1），呈NW-SE走向。在先期开挖的3＃核岛东侧减震沟中也发现了构造破碎带（照片3-1），破碎带亦呈NW-SE走向，并且上述5个钻孔连线的延长线通过减震沟的破碎带位置。显然钻孔和减震沟所发现的破碎带属特殊地质体。钻孔揭露的特殊地质体深度超过56m。
为了查明特殊地质体在场地内的分布，2003年，核工业工程勘察院在地面共布置了5条探槽和5条电阻率剖面测线（见图3-1），探槽和电阻率剖面大致垂直于上述5个钻孔的连线，间距30m左右，探槽的长度以能覆盖特殊地质体为准，电阻率剖面长度以能覆盖特殊地质体，并在其两侧有足够长度的正常场为准。由于当时场地内堆放了大量的石料，探槽和电阻率剖面的位置作了适当调整，电阻率剖面P3～P4测线之间为60m，203钻孔西侧没有布置探槽和电阻率剖面。3＃核岛基坑开挖至-0.8m后，又对基坑坑壁和坑底进行了编录。
2008年，核工业工程勘察院又在3＃、4＃核岛之间开挖了3条探槽（见图3-1），以查明3＃、4＃核岛场地内特殊地质体的关系。
通过上述调查发现3＃核岛场地和3＃、4＃核岛之间分布有2条特殊地质体。其中大的一条特殊地质体在3＃核岛场地内的展布长度175m左右，揭露宽度7.0～14.0m，方向330°左右（见图3-1），向北西尖灭于固体废物暂存库（9UKT）场地西北部，各电阻率剖面上均有一个宽度为12.0～16.0m的明显低阻段，其位置与探槽发现的该特殊地质体位置基本重合；较小的一条特殊地质体位于固体废物暂存库9UKT西北，展布于3＃、4＃核岛之间，长约40m，最大宽度约5m，呈明显的透镜体装，方向330°左右（见图3-1）。
从3＃核岛基坑坑底来看，特殊地质体是连续分布的，从基坑东南角到西北角斜穿安全厂房（UKD）地基（图3-2），总体走向为NW335°左右，长度近70m，宽度约3.5～15m，与探槽揭露、电阻率剖面探测的结果基本一致。
在一期工程2＃机组的循环冷却水隧洞（UPN）、核服务厂房基坑（UKC）和常规岛基坑（循环冷却水泵房UQA和汽轮机厂房UMA）编录中发现了深层强风化岩体，这些强风化岩体均呈NW～SE走向，陡倾角，带内岩体破碎，与围岩的接触带上有白色或红色的粘土矿物呈条带分布，空间上处在3＃核岛特殊地质体向南东的延长线上（图3-3），这些深层强风化岩体可能是3＃核岛特殊地质体向南东方向的延伸。
在编录中发现，与2#循环水隧洞及核服务厂房基底所见深层强风化带相比较，常规岛段岩体破碎程度较轻，并且见深层强风化岩体在汽轮机厂房基坑中部尖灭，基坑东壁上未发现深层强风化岩体（图3-4）。
为了查明厂址附近海域基岩面埋深、形态及海域断裂情况，尤其是查明烧香河断裂在海域的延伸情况，江苏省工程物理勘察院在厂址附近海域做过人工地震勘察，测线布置见图3-5。如果特殊地质体向南延伸的话，这次海域人工地震勘察的测31和测2线相应位置应该有异常显示，但这两条测线时间剖面（图3-6、图3-7）上的T5波组（基岩面反射波组）稳定、清晰、连续而平坦，其它波组同样是稳定和连续的，没有受到断层错动的影响均未发现异常。
根据以上两点判断，3＃核岛特殊地质体在2＃汽轮机厂房基坑中部已尖灭，未向东南方向延伸。
3. Spatial Distribution of Special Geologic Bodies
Special geologic bodies in extension project of Tianwan Nuclear Power Station haven't been found in surface geological work before construction of Tianwan Nuclear Power Station. The special geologic bodies are not found as well in area nearby the station site in 1:50000 geological map, 1:2000 engineering geological map for the feasibility study of the Tianwan nuclear power station and 1:1000 engineering geological map for the first-stage project of the power station, even the larger scale air photos taken in 1978 doesn't directly show its images. Due to the ongoing earthwork stone excavation of Tianwan Nuclear Power Station, the special geologic bodies were exposed out of the current ground.
3.1 Plane Distribution of Special Geologic Bodies
3.1.1 Distribution within 3＃ nuclear island site
During the detail survey of extension engineering, fracture zones were found in the five drills, including 203, 214, 220, 220-1 and 220-2, above of which were distributed in a straight line, (see Fig.3-1), running along the direction of NW-SE. The structure fracture zone (see Picture 3-1) was also found in the damping ditch which was excavated at the early stage in the east of 3＃ nuclear island, this fracture zone also runs along the direction of NW-SE, in addition, the extension line of the above five drills passes through position of the fracture zone in the damping ditch. Evidently, the fracture zone existed in the drills and damping ditches could be classified into the geologic bodies. The depth of geologic bodies disclosed by the drills is about 56m.
In order to find out the distribution in the area, the Nuclear Industry Engineering Reconnaissance Institution deployed 5 trial trenches and 5 resistivity profile measuring wire on the ground in 2003 ( Figure 3-1), the trial trenches and profile are vertical to the ligature of the 5 drill holes, and the separation distance is about 30m. The length of the trial trench can cover the special geological body. The length of the resistivity profile can cover the special geological body and it has normal field long enough in the two sides. Since a plentiful of stone is stacked in the site, the positions of trenches and resistivity profile have been adjusted properly, distance between P3～P4 of resistivity profile is 60m, and no trench and resistivity profile were arranged in the west of 203 drill. After the foundation pit of 3# nuclear island is excavated to depth of -0.8m, the walls and bottom of foundation pit were cataloged again.
In 2008, the Nuclear Industry Engineering Survey Institute excavated 3 trial trenches between No.3 and No.4 nuclear island (Figure 3-1) to find out the relationship of the special geological bodies in the area of No.3 and No.4 nuclear islands.
Through the investigation above, 2 geological bodies are found in No.3 nuclear island and the space between No.3 and No.4 nuclear islands. The larger one is about 175m in length in No.3 nuclear island, the exposure width is about 7.0m to 14.0m, and the direction is about 330° (Figure 3-1). It ends at the solid waste temporary storage place (9UKT) in the northwest. There is a part of low resistance with the width of 12.0 to 16.0m in each resistivity profile, and its position is almost the same with the special geological bodies found in the trial trenches. And the smaller special geological body is located at northwest of the waste temporary storage place (9UKT), between No.3 and No.4 nuclear island, it is about 40m in length and the max width is about 5m. It presents to be lenticular form, and the direction is about 330° (Figure 3-1).
Seen from the base of the foundation pit, the special geological body is continuous distribution. It goes from southeast corner to the northwest corner to cross the base of the save plant (UKD) (Figure 3-2), the overall direction is about NW335°, and the length is nearly 70m, the width is 3.5 to 15m. It is coincident with the detecting result of the trial trenches and resistivity profile.
1. In the catalog of circulating cooling water tunnel of No.2 generating unit (UPN), the foundation pit of nuclear service plant (UKC) and foundation pit of CI (conventional island)(circulating cooling water pump house (UQA) and steam turbine house (UMA)) of Phase I project, deep strongly weathered rock mass was found. These strongly weathered rocks are all in NW-SE direction, with steep dip; the rock mass were broken within the zone, and there were white or red clay minerals in the contact belt with the surrounding rocks distributed in stripes. These rock mass are in the southeastward extension line of the special geologic body on No.3 NI (Fig.3-3). These deep strongly weathered rock mass is probably the southeastward extension of special geologic body of No.3 NI.
1. It is found in the catalog that, compared with the deep strongly weathered belt found in No.2 circulating cooling water tunnel and foundation bottom of nuclear service building, the fracture degree of rock mass in CI section is relatively low, and it is seen that the deep strongly weathered rock mass pinched out in the center of foundation pit of steam turbine house; no deep strongly weathered rock mass is found in the east wall of foundation pit (Fig.3-4).
1. In order to find out the buried depth and shape of offshore bedrock near the plant site and offshore fractures, esp. the extension of Shaoxianghe Fracture in offshore area, the Jiangsu Engineering Physical Survey Institute conducted seismic survey in offshore area near the plant site. See survey lines in Fig.3-5.1. If the special geologic body extended to the south, then the survey lines of 31 and 2 of this offshore seismic survey should show abnormal indications in their respective locations, but the T5 wave groups on time profile of these two survey lines (Fig.3-6 and 3-7) are stable, clear, continuous and plat; the other wave groups are also stable and continuous, not affected by faulting.
1. So judged by the above two points, the special geologic body of No.3 NI has pinched out at the middle of foundation pit of No.2 Steam turbine house, not extending to the southeast.
2012.10.21