特殊地質(zhì)體翻譯-中英對(duì)照
2個(gè)發(fā)現(xiàn)特殊地質(zhì)體的斜孔，XK3在孔深71.2～77.9m（斜深）標(biāo)高－59.91～-66.26處發(fā)現(xiàn)特殊地質(zhì)體，水平投影寬約2.14m；XK4孔在63.4～70.7m（斜深）標(biāo)高－61.35～-68.35處發(fā)現(xiàn)特殊地質(zhì)體，水平投影寬約2.06m。3＃核島特殊地質(zhì)體地面（標(biāo)高7.6m）揭露寬度7～14m，表明特殊地質(zhì)體向下明顯變窄了。
3個(gè)未發(fā)現(xiàn)特殊地質(zhì)體的鉆孔，XK1、XK2孔位于特殊地質(zhì)體的東北側(cè)，深度分別為168.59m和156.12m（均為斜深，下同），鉆孔軌跡的水平投影超過(guò)特殊地質(zhì)體西南邊界（地面處）約2m；另一個(gè)斜孔XK5位于特殊地質(zhì)體的西南側(cè)，與XK1、XK3基本處在一條直線上，傾斜方向相反，深度135.20m，鉆孔軌跡的水平投影超過(guò)特殊地質(zhì)體東北邊界（地面處）約1m（見圖1-1）。從1－1’剖面（圖3-13）可以看出，特殊地質(zhì)體在XK1、XK5交點(diǎn)之上和XK3孔-66.26m之下尖滅了。
尖滅點(diǎn)的位置按內(nèi)插法確定：取剖面1處特殊地質(zhì)體邊界的理論交點(diǎn)（圖3-11中A點(diǎn)）和XK1與XK5交點(diǎn)（圖3-13中B點(diǎn)）的中間位置，作為特殊地質(zhì)體的尖滅點(diǎn)（圖3-13中C點(diǎn)），標(biāo)高-94m左右。
XK4孔發(fā)現(xiàn)特殊地質(zhì)體的標(biāo)高、水平投影寬度與XK3孔基本一致，而XK2孔沒有發(fā)現(xiàn)特殊地質(zhì)體，剖面1－1’和剖面2－2’的位置相距只有約32m，可以合理地認(rèn)為剖面2－2’處特殊地質(zhì)體在XK4和XK2之間尖滅了（圖3-13），尖滅點(diǎn)的位置也在該標(biāo)高位置。
圖3-13 1—1’工程地質(zhì)剖面圖
圖3-14 2—2’工程地質(zhì)剖面圖
4.特殊地質(zhì)體的斷面特征
為了研究特殊地質(zhì)體的本身的地質(zhì)特征及成因，2002年核二院對(duì)場(chǎng)地內(nèi)揭露的特殊地質(zhì)體4個(gè)人工剖面進(jìn)行了詳細(xì)研究，并在剖面上采取破碎帶中的斷層泥和碎粒巖，測(cè)定特殊地質(zhì)體的新活動(dòng)年齡。
（1）3＃核島基坑?xùn)|南壁剖面（剖面1，圖4-1，照片4-1）
①微風(fēng)化二長(zhǎng)淺粒巖；②破碎帶；③相對(duì)完整巖體
圖4-1 3＃核島基坑?xùn)|壁特殊地質(zhì)體露頭素描圖
剖面位置見圖3-2。該剖面上特殊地質(zhì)體呈現(xiàn)上窄下寬特征，下部寬度9.20m，上寬7.20m。特殊地質(zhì)體和兩側(cè)圍巖均為二長(zhǎng)淺粒巖，特殊地質(zhì)體原巖鉀長(zhǎng)石含量比兩側(cè)圍巖偏多，破碎程度明顯高于兩側(cè)圍巖。特殊地質(zhì)體與圍巖呈斷面接觸，北斷面產(chǎn)狀72°∠79°，南斷面產(chǎn)狀238°∠84°。從北斷面往南，0～5.0m為碎裂巖帶，粒徑1～20cm，磨圓度差，呈棱角狀，由次級(jí)節(jié)理切割而成；5.0～9.0m巖石相對(duì)較完整，節(jié)理間距8～30cm，向南節(jié)理間距變寬；9.0～9.2m，碎裂巖帶，角礫呈次圓狀，9.2m處為南斷面，斷面上有厚1～2mm的咖啡色斷層泥。
北斷面以南30cm有一滑動(dòng)面，滑動(dòng)面上有厚約1cm的斷層泥，灰綠色、褐色（照片4-2），該滑動(dòng)面右下方有一組清晰的羽狀剪節(jié)理，節(jié)理面光滑，閉合，略呈弧形，與該滑動(dòng)面交角總體成15°～20°，越接近滑動(dòng)面角度越大（見圖4-1、照片4-3）。在碎裂巖帶中有一長(zhǎng)約5.3m、寬2.4m的構(gòu)造透鏡體（見圖4-1），巖性為二長(zhǎng)淺粒巖，微風(fēng)化。
（2）3＃核島基坑西壁剖面（剖面2，圖4-2，照片4-4）
①微風(fēng)化二長(zhǎng)淺粒巖；②破碎帶；③相對(duì)完整巖體
圖4-2 3＃核島基坑西壁特殊地質(zhì)體露頭素描圖
剖面2與剖面1相距約66m（見圖3-2），該剖面上特殊地質(zhì)體亦呈現(xiàn)上窄下寬特征，下部寬約14m，該剖面處特殊地質(zhì)體寬度雖然比剖面1處大，但破碎程度低于剖面1處。特殊地質(zhì)體原巖和兩側(cè)圍巖均為二長(zhǎng)淺粒巖，破碎程度明顯高于兩側(cè)圍巖，破碎帶與圍巖呈斷面接觸，斷面陡傾角。在該剖面上，特殊地質(zhì)體從西至東依次為：破碎帶，表現(xiàn)為碎粒巖，寬約20cm；相對(duì)完整巖體，節(jié)理發(fā)育，寬約2.0m；破碎帶，表現(xiàn)為碎塊巖，寬約2.0m；相對(duì)完整巖體，寬約約8.2m；破碎帶，巖石破碎成碎粒巖～碎塊巖，越近斷面巖石越破碎，寬1.60m。東主斷面外側(cè)有斷續(xù)分布的綠泥石片巖分布（照片4-5），綠泥石片巖表面上有不明顯的擦痕，靠近斷面的圍巖鉀長(zhǎng)石含量高，為鉀長(zhǎng)淺粒巖。
（3）4＃核島TC探槽西壁（剖面3，圖4-3）
①微風(fēng)化二長(zhǎng)淺粒巖；②破碎帶；③相對(duì)完整巖體
圖4-3 4＃核島探槽TC西壁特殊地質(zhì)體露頭素描圖
Special geological bodies are found in two inclined holes. The special geological body of XK3 is found in the hole depth 71.2~ 77.9 m (along hole depth) -59.91~ -66.26 in elevation, and the horizontal projection width is about 2.14m. The special geological body of XK4 is found in the hole depth 63.4~ 70.7 m (along hole depth) -61.35~ -68.35 in elevation, and the horizontal projection width is about 2.06m. The exposure width of 3” nuclear island special geological body ground (elevation 7.6m) is 7~14m, indicating that the special geological body significantly narrowed down.
No special geological body is found in three inclined holes. XK1 and XK2 holes is located in the northeastern part of the special geological body, the depth is 168.59m and 156.12m respectively (both are hole depth, following the same). The horizontal projection of drilling trajectory is about 2m more than the southwestern boundary (ground surface) of the special geological body. The other inclined hole XK5 is located in the southwestern part of the special geological body, and it is located with XK1 and XK3 basically in a straight line. But it tilts in opposite direction, and the depth is 135.20m. The horizontal projection of drilling trajectory is about 1m more than the northeastern boundary (ground surface) of the special geological body (see figure 1-1). From 1-1’ profile (Figure 3-13) can be seen, special geological body pinch out above the intersection of XK1 and XK5 and below -66.26m of XK3 hole.
Pinch-out location of the point determined by interpolation: take the middle position between the theoretical intersection of special geological body boundary at profile 1 (Figure 3-11, A point) and the intersection of XK1 and XK5 (Figure 3-13, C point) as the pinch-out point of special geological body, elevation -94m or so.
The elevation and horizontal projection width of the special geological body found in XK4 hole is basically consistent with XK3, but no special geological body is found in XK2 hole. Because profile 1-1’ and profile 2-2’ localize only 32m away from each other, it is reasonable to consider special geological body pinches out between XK4 and XK2 at profile 2-2’ (Figure 3-13), and the pinch-out point is located at the elevation position.
Figure 3-13 1—1’engineering geology profile
Figure 3-14 2—2’ engineering geology profile
4. Characteristic of fracture surface of special geological body
In order to find out the geology feature and cause of formation of the special geological body, No.2 Research and Design Institute of Nuclear Industry carried out study to the 4 artificial profiles of the special geological body exposed in the area. They also took the gouge and rock pellet to measure the new active age of the special geological body.
（1）Profile of southeast wall of 3# nuclear island (Profile 1, Figure 4-1, and Photo 4-1)
①Slightly weathered monzonitic leucogranulitite②Fracture zone;③relatively complete rockbody
Figure 4-1 Sketch for outcrop of the special geological body in 3# nuclear island foundation pit
The position of the profile is in Figure 3-2; the special geological body shows a typical characteristic of wide at the top and narrow at the bottom, the width at bottom is 9.20m and at top is 7.20m. The special geological body and surrounding rock of both sides are leptite. The potash feldspar in special geological body is more than that in the surrounding rock, and the degree of crushing is higher than the surrounding rock. The special geological body contacts with surrounding rock by fracture surface, the north fracture surface is 72°∠79°and the south fracture is 238°∠84°.From north fracture surface to the south, there is cataclastic rock zone in 0 to 50m, the grain size is 1-20cm, the psephicity is not good and the shape is sharp, it is cut from secondary joint; from 5.0 to 9.0m, the rock is relative integrated, the space between joints is 8 to 30cm, and the joint become wider in the south; from 9.0 to 9.2m, it is cataclastic rock zone, the rubble is hypo-round, and the 9.2m position is south fracture surface, there is coffee fault gouge on it.
There is a sliding surface at south of north fracture surface, there is 1 cm of celadon and brown fault gouge on it (Figure 4-2); there is a group of clear shear joint at right below the sliding surface, the joint plane is smooth and closed, it presents as arc-shaped, the angle between the sliding surface and the joint is 15°to 20°, the angle grows as it is closer to the sliding surface (Figure 4-1, picture 4-3). There is a structural lenticular body in the cataclastic rock zone with the length of 5.3m and the width of 2.4m (Figure 4-1), it is leptite and is a little weathered.
（2）Profile of west wall of 3# nuclear island (Profile 2, Figure 4-2, and Photo 4-4)
①Slightly weathered monzonitic leucogranulitite②Fracture zone;③relatively complete rock body
Figure 4-2 3＃核島基坑西壁特殊地質(zhì)體露頭素描圖
The distance between profile 2 and profile 1 is about 66m (Figure 3-2). The special geological body shows a typical characteristic of wide at the top and narrow at the bottom. The width of the bottom is about 14m, though it is wider than profile 1, but the degree of crushing is less than profile 1. he primary rock and surrounding rock of the special geological body are both leptite, the degree of crushing is much more than the surrounding rock, the fracture zone contact with the surrounding wall by fracture surface, the fracture surface is dip angle. In the profile, the special geological body ranges from west to east is: fracture zone, presents as grain particles, it is 2.0m wide; relatively complete rockbody, it is about 8.2m wide;the fracture zone, the rock breaks to cataclastic rock and fragment rock, the degree of crushing grows as it is closer to the fracture surface with the width of 1.60m.There is distribution of chlorite schist at outboard of the east main fracture surface (Picture 4-5). There is unconspicuous scoring on the surface of chlorite schist, the content of potash feldspar is high at surrounding rock near the fracture surface, and it is potash leptite.
（3）West wall of TC trench in 4＃nuclear island (profile 3,Figure 4-3)
①Slightly weathered monzonitic leucogranulitite②Fracture zone;③relatively complete rock body
Figure 4-3 The outcrop sketch map of the west wall of TC trench in 4＃nuclear island
2013.2.23