WO2015188693A1 - 地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置 - Google Patents

地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置 Download PDF

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Publication number
WO2015188693A1
WO2015188693A1 PCT/CN2015/079879 CN2015079879W WO2015188693A1 WO 2015188693 A1 WO2015188693 A1 WO 2015188693A1 CN 2015079879 W CN2015079879 W CN 2015079879W WO 2015188693 A1 WO2015188693 A1 WO 2015188693A1
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Prior art keywords
hole
cavern
combined
nuclear
building
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PCT/CN2015/079879
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English (en)
French (fr)
Inventor
刘立新
刘百兴
苏利军
李锋
杨学红
张治军
缪正建
张志国
陶铁铃
万艳雷
Original Assignee
长江勘测规划设计研究有限责任公司
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Priority claimed from CN201420316976.5U external-priority patent/CN203961365U/zh
Priority claimed from CN201410264520.3A external-priority patent/CN104060859B/zh
Application filed by 长江勘测规划设计研究有限责任公司 filed Critical 长江勘测规划设计研究有限责任公司
Priority to JP2017517166A priority Critical patent/JP6280290B2/ja
Priority to RU2017100890A priority patent/RU2648775C1/ru
Publication of WO2015188693A1 publication Critical patent/WO2015188693A1/zh
Priority to US15/376,602 priority patent/US10316662B2/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D13/00—Large underground chambers; Methods or apparatus for making them
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D1/00—Details of nuclear power plant
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C1/00—Reactor types
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the invention relates to the technical field of nuclear power engineering, in particular to a construction arrangement of an underground cavern group of a nuclear island power plant of an underground nuclear power plant perpendicular to the depth direction of the mountain body.
  • the underground powerhouse cavern group of the hydropower station is relatively common.
  • the engineering scale of the underground nuclear power plant cavern group is basically the same as that of the hydropower underground powerhouse cavern group.
  • there are fewer permanent passages available the local hollowing rate of the mountain is high, and the nuclear power engineering requires a high degree of modularity, so the layout of the construction support hole is more restricted.
  • the object of the present invention is to overcome the deficiencies of the above background art, and to provide a construction arrangement of an underground cavern group of a nuclear power plant of an underground nuclear power plant perpendicular to the depth direction of the mountain body, which has short mileage, good safety, convenient construction, low investment, and modularization. A high degree of character.
  • the underground cavern group of the underground nuclear power plant of the underground nuclear power plant is perpendicular to the depth direction of the mountain body, and comprises two nuclear reactor building caverns whose central axis line is perpendicular to the depth direction of the mountain body, and each side of the nuclear reactor building cavity There are respectively a combined cavern and an electrical building cavern.
  • the ends of the two combined caverns are connected and arranged in parallel with the central axis of the two nuclear reactor building chambers.
  • the layout of the two electrical building chambers and the two nuclear reactor buildings The central axis of the cavern is parallel, and there is a pressure relief cavern between each combined cavern and its corresponding electrical building cavern.
  • the outdoor side of each of the two combined caverns is respectively connected to the two combined caves through the traffic tunnel.
  • the side traffic holes on the outdoor side are connected, and the two ends of the side traffic holes are respectively connected to the first main traffic hole and the third main traffic hole arranged along the depth direction of the mountain body, the first main traffic hole and the third main traffic hole. They are respectively located outside the two end faces of the two combined tunnels, and the first main traffic hole and the third main traffic hole are arranged along the depth direction of the mountain body and are connected to the central part of the two combined caverns connected together.
  • a second main traffic hole the first main traffic hole, the second main traffic hole and the third main traffic hole are all connected to the surface, the nuclear reactor building cavern, the combined cavern, the electric house cavern and the pressure relief cavern Forming a nuclear island building cavern group, the top arch arch or the top arch end wall of each of the nuclear island building cavern group communicates with the surface through a top layer supporting hole system for construction, the nuclear island building cavern group
  • the side wall or end wall wall of each cavern passes as a slag Adit underlying channel system connected to the first main hole transport, hole transport and the second main third main traffic tunnel.
  • the top burrow system includes a first main burrow, a top nuclear cavity of the first nuclear reactor building, a top nuclear cavity of the second nuclear reactor building, a second main burrow, and a third main burrow a fourth main branch hole, a top branch hole of the electric power plant, a top support hole of the first pressure relief hole and a top support hole of the second pressure relief hole, the first main branch hole, the second main branch hole and the third main branch hole
  • the fourth main branch hole is arranged along the depth direction of the mountain body, and both are connected to the surface, and the elevation of the first main branch hole is higher than the elevation of the second main branch hole, the third main branch hole and the fourth main branch hole.
  • the first main branch hole is connected to the top arch of the first nuclear reactor building cavern and the top nuclear cavity of the second nuclear reactor building, respectively, and the top arch of the two nuclear reactor building chambers
  • the second main branch hole and The fourth main branch hole is respectively connected to the top arch end wall of the two combined chambers which are connected together, and the third main branch hole and the top arch arch in the middle of the two combined hole chambers connected together
  • the middle section of the third main branch hole is provided with two separate and two electrical building caverns a top support hole of an electrical building connected to the end wall
  • the third main support hole is provided with a first pressure relief hole top hole connected to a top arch of the pressure relief hole
  • the fourth main hole is provided
  • the longitudinal slope of each of the top branch holes in the top layer cavity system is less than 9%.
  • the bottom burrow system includes a bottom hole of a first nuclear reactor building, a bottom hole of the first combined cavity, a bottom hole of the first electrical building, and a bottom hole of the middle part of the combined cavity,
  • a middle section of a main traffic tunnel is provided with a bottom hole of a first electrical building connected to an end wall of an electrical building
  • a middle section of the second main traffic tunnel is provided with another electrical building a bottom wall of the second electrical building connected to the wall
  • the second main traffic hole passing through the bottom wall of the first nuclear reactor building and the bottom of the first pressure relief hole respectively and a bottom of the side wall of a nuclear reactor building
  • the bottom of the pressure relief chamber is connected, and the third main traffic hole passes through the bottom wall of the second nuclear reactor building and the bottom of the second pressure relief hole respectively, and the bottom of the side wall of the other nuclear reactor building
  • the longitudinal slope of each bottom branch hole in the bottom layer cavity system is less than 15%.
  • each of the combined caverns includes a first safety building cavern, a nuclear fuel plant cavern, a second safety planting cavern, and a nuclear auxiliary building cavern, which are longitudinally connected in series, wherein a core of the combined cavern
  • the auxiliary plant cavity is connected to the first safe house cavity of the other combined cavity, the bottom hole of the first combined cavity end and the side wall of the first safety building cavity at the end of the two combined cavity Connected to the bottom, the bottom hole of the middle portion of the combined cavity is connected to the bottom of the side wall of the nuclear auxiliary building chamber located in the middle of the two combined holes, and the bottom hole of the second combined cavity is located at two combined holes
  • the other end of the chamber is connected to the bottom of the side wall of the nuclear auxiliary building chamber;
  • the second main branch hole is connected to the top arch end wall of the first safe building chamber at the end of the two combined chambers,
  • the fourth main The branch hole is connected to the top arch end wall of the nuclear auxiliary building chamber at the
  • each nuclear reactor building chamber and its corresponding electrical building chamber are connected by a main steam passage connected to the surface, and the two nuclear reactor building chambers are provided with corresponding equipment passages communicating with the surface.
  • the underground cavern group of the nuclear island power plant of the underground nuclear power plant is perpendicular to the construction direction of the mountain body, and has the following beneficial effects: the invention fully utilizes the main traffic hole of ⁇ 0 m elevation to set the bottom support hole of each factory cavern as the slag discharge channel. And from the outside of the mountain, there is a top-level branch hole leading to each factory cavern as a construction passage, and each building cavern can be constructed according to the slipway method with the least construction channel (the so-called slip method is vertical between the upper and lower passages of the excavation area).
  • each building cavern has only two layers of top and bottom layers.
  • the top burrow system leads to the top arch of each plant.
  • the bottom burrow system leads to the bottom of each factory wall. Since the bottom elevation of the pressure relief chamber is different from the elevation of the main traffic tunnel by 20m, it is difficult to arrange the bottom branch hole of the suitable longitudinal slope. Therefore, the bottom hole of the pressure relief tunnel is first horizontally connected to the central axis of the pressure relief tunnel, and then under construction. In the process, the slag shaft is connected to the bottom of the pressure relief chamber.
  • the bottom hole is led by the main traffic hole.
  • the combined cavern, the electrical building cavern and the pressure relief cavern connected by the nuclear auxiliary workshop cavern, the second safe workshop cavern, the nuclear fuel plant cavern and the first safe workshop cavern, the top layer of the top layer is provided It is taken out by the second main branch hole, the third main branch hole and the fourth main branch hole.
  • the top arch of the nuclear reactor building chamber is the highest, and the construction channel cannot be shared with other caverns on the façade and the plane. Therefore, the first main branch hole is separately set, and then the top hole of the two nuclear reactor building chambers is separately branched. It leads to the elevation of the arch of the two nuclear reactor building caverns.
  • the invention has the least construction channel set by the slip method, and has the advantages of short mileage, good safety, convenient construction, low investment and high modularity, and meets the overall requirements of the construction.
  • FIG. 1 is a schematic structural view showing a structure related to a bottom support hole system in a construction arrangement of an underground cavern group of a nuclear island power plant of an underground nuclear power plant perpendicular to a depth direction of the mountain;
  • FIG. 2 is a schematic structural view of a combined cavern, an electrical building cavern and a pressure relief cavern and a related top layer cavity system in a construction arrangement of an underground cavern of a nuclear island power plant of an underground nuclear power plant perpendicular to the depth direction of the mountain;
  • FIG 3 is a structural schematic view of a nuclear reactor building cavern and its associated top-level cavity system in a construction arrangement of an underground cavern of a nuclear island power plant of an underground nuclear power plant perpendicular to the depth direction of the mountain.
  • the underground cavern group of the nuclear island power plant of the underground nuclear power plant of the present invention is perpendicular to the construction direction of the mountain body, including the nuclear reactor building cavern 1, the combined cavern, the electrical building cavern, and the pressure relief cavern.
  • the first main traffic hole 8, the second main traffic hole 9, the third main traffic hole 10 the top hole system, the bottom hole system, the main steam passage 11, the equipment passage 12, the branch traffic tunnel 13, and the side traffic tunnel 14.
  • the nuclear reactor building chamber 1 is two, the central axis connection of the two nuclear reactor building chambers 1 and the vertical Vertically and vertically, each of the nuclear reactor building chambers 1 is provided with a combined cavern and an electrical building cavern 2 on each side.
  • the ends of the two combined chambers are connected and arranged in parallel with the central axis of the two nuclear reactor building chambers 1.
  • the layout of the two electrical building chambers 2 is parallel to the central axis of the two nuclear reactor building chambers 1.
  • a pressure relief chamber 7 is disposed between each of the combined caverns and its corresponding electrical house cavity 2, and the outdoor side of each of the two combined caverns respectively passes through the branch traffic tunnel 13 and the side traffic on the outdoor side of the two combined tunnels Hole 14 is connected.
  • the two ends of the side traffic hole 14 are respectively connected to the first main traffic hole 8 and the third main traffic hole 10 arranged along the depth direction of the mountain body, and the first main traffic hole 8 and the third main traffic hole 10 are respectively located at two.
  • the nuclear reactor building chamber 1, the combined cavern, the electrical building cavern 2 and the pressure relief cavern 7 constitute a nuclear island building cavern group, and the arch arch or arch of each cavern of the nuclear island building cavern group
  • the end wall communicates with the surface through the top burrow system for construction, and the side wall or the end wall bottom of each cavern of the nuclear island building cavern passes through the bottom burrowing system and the first main traffic hole as the slag passage 8.
  • the second main traffic hole 9 is connected to the third main traffic hole 10.
  • Each of the combined cavities comprises a first safety building chamber 3, a nuclear fuel plant chamber 4, a second safety building chamber 5 and a nuclear auxiliary building chamber 6, which are longitudinally connected in series, and a nuclear auxiliary plant of the combined chamber
  • the chamber 6 is connected to the first safe building chamber 3 of the other combined chamber.
  • the top burrow system includes a first main branch hole 41, a first nuclear reactor building cavern top floor hole 42, a second nuclear reactor building cavern top floor branch hole 43, a second main branch hole 31, and a third main branch hole 32, The fourth main branch hole 33, the electric plant top floor support hole 34, the first pressure relief hole top support hole 35 and the second pressure relief hole top support hole 36.
  • the first main branch hole 41, the second main branch hole 31, the third main branch hole 32, and the fourth main branch hole 33 are all arranged along the depth direction of the mountain body and are all connected to the surface.
  • the first main branch hole 41 The elevation is higher than the elevation of the second main branch hole 31, the third main branch hole 32, and the fourth main branch hole 33.
  • the first main branch hole 41 is connected to the top arch of the two nuclear reactor building chambers through the first nuclear reactor building cavern top hole 42 and the second nuclear reactor building cavity top hole 43 respectively.
  • the second main branch hole 31 is connected to the top arch end wall of the first safe building chamber 3 at the end of the two combined chambers, and the fourth main branch hole 33 is located at the end of the two combined chambers.
  • the top arch end walls of the nuclear auxiliary plant cavities 6 are connected, and the third main branch holes 32 are connected to the top arches of the nuclear auxiliary plant cavities 6 located in the middle of the two combined tunnels.
  • the middle section of the third main branch hole 32 is provided with two electric plant top floor holes 34 respectively connected to the top arch end walls of the two electrical building chambers 2.
  • the third main branch hole 32 is provided with a first pressure relief hole top hole 35 connected to a top arch of a pressure relief hole chamber 7, the fourth main branch The hole 33 is provided with a second pressure relief hole top hole 36 connected to the top arch of the other pressure relief hole 7, and the first pressure relief hole top hole 35 is located at the top branch hole 34 and the combination hole of the electric plant. Between the rooms.
  • the longitudinal slope of each top hole in the top hole system is less than 9% to meet the requirements of trackless transportation.
  • the bottom burrow system includes a bottom nuclear cavity 21 of the first nuclear reactor building, a bottom hole 22 at the end of the first combined cavity, a bottom hole 23 of the first electrical building, and a bottom hole 24 of the middle of the combined cavity.
  • the middle portion of the first main traffic hole 8 is provided with a first electrical building bottom hole 23 connected to an end wall of an electric house, and the second main traffic hole 9 is provided with another electric house cavity 2 The second electrical building bottom hole 29 connected to the end wall.
  • the second main traffic hole 9 passes through the bottom wall of the first nuclear reactor building and the bottom of the first pressure relief hole 25 respectively, and the bottom of the side wall of a nuclear reactor building chamber 1 and the bottom of a pressure relief chamber 7 Connected, the third main traffic tunnel 10 passes through the bottom wall of the second nuclear reactor building and the bottom of the second pressure relief hole 27 and the bottom of the wall of the other nuclear reactor building, respectively, and the other pressure relief hole.
  • the bottom of the chamber 7 is connected.
  • the first main traffic hole 8 is connected to the bottom of the side wall of the first safety building chamber 3 at the end of the two combined holes through the first combined hole end bottom hole 22, the second electrical building bottom layer
  • the branch hole 29 is connected to the bottom of the side wall of the nuclear auxiliary power house 6 located at the middle of the two combined holes by the bottom hole 24 of the middle portion of the combined cavity, and the bottom hole 27 of the second pressure relief hole passes through the second combined cavity
  • the end bottom branch 28 is connected to the bottom of the side wall of the nuclear auxiliary building chamber 6 at the other end of the two combined chambers.
  • the longitudinal slope of each bottom support hole in the bottom support cavity system is less than 15% to meet the requirements of trackless transportation.
  • Each of the nuclear reactor building chambers 1 and its corresponding electrical building chamber 2 are connected by a main steam passage 11 connected to the surface, and the two nuclear reactor building chambers 1 are provided with corresponding device passages 12 communicating with the surface. Both the main steam passage 11 and the equipment passage 12 can serve as construction passages.
  • the underground nuclear power plant of the present embodiment adopts a double-stack CUP600 arrangement, and uses the chute method to organize the underground house excavation, that is, excavation from the upper working surface, and the slag is organized from the bottom working surface by the slag slag.
  • the construction can meet the construction requirements with the least construction channel. Therefore, the caverns of the invention need only be provided with two layers of the top and bottom layers: the bottom branch can make full use of the existing permanent passages.
  • the second main traffic hole 9 and the third main traffic hole are arranged in 10 minutes; the top support hole can pass through the first main branch hole 41, the second main branch hole 31, the third main branch hole 32 and the fourth main branch hole 33.
  • the splitting arrangement is beneficial to reduce the amount of construction work of the branch hole.
  • the bottom support system and the top support system are properly spaced from the surrounding caverns to ensure stable and safe caverns.
  • Excavation has fewer holes and shorter mileage. Investing on the province, with fewer holes, shorter mileage and appropriate spacing, the safety of the whole project will be better; since the double-cluster CUP600 underground nuclear power plant layout nuclear island plant cavern group has been modularized, the structure of the present invention Design and construction can be modularized. The specific implementation is as follows:
  • the first main traffic hole 8, the second main traffic hole 9 and the third main traffic hole 10 as the permanent passages, and the main steam passage 11 which can be used as the passage are all arranged at an elevation of ⁇ 0 m, and the bottom elevation of each of the building chambers is There is a large difference: for example, the bottom elevation of the nuclear reactor building cavern 1 is -9.0m, the bottom elevation of the combined cavern is -12.5m, and the bottom elevation of the electrical building cavern 2 is -12.5m. It is +20.0m, so the first main traffic hole 8, the second main traffic hole 9 and the third main traffic hole 10 as the permanent channel, and the main steam channel 11 which can be used as the channel cannot be directly utilized on the plane and the façade. .
  • the cost of the tunnel project is not to set up the main hole at the bottom, but to make full use of the permanent passage.
  • the first main traffic hole 8, the second main traffic hole 9 and the third main traffic hole are 10 minutes, and the bottom hole 21 is arranged. 22, 23, 24, 25, 26, 27 and 28 lead to the bottom elevation of each chamber.
  • the bottom elevation of the pressure relief chamber 7 and the elevation of the main traffic tunnel are up to 20 m, it is difficult to arrange the bottom hole of the appropriate longitudinal slope, so the bottom hole 25, 27 of the pressure relief hole is first horizontally connected to the pressure relief chamber 7 At the center shaft, the bottom of the pressure relief chamber 7 is connected by a slag shaft during the construction process.
  • the longitudinal slopes of the above-mentioned bottom holes are less than 15%, which meets the requirements of trackless transportation.
  • the top elevation of the nuclear reactor building cavern is +78.0m
  • the top elevation of the combined cavern is +57.85m
  • the top elevation of the electrical building cavern is +46.8m
  • the top elevation of the pressure chamber is +62.0m, so the first main traffic hole 8, the second main traffic hole 9 and the third main traffic hole 10 of the permanent passage cannot be used on both the plane and the façade, and the elevation of the equipment passage 12 is +20.0m
  • the height difference with each cavern is too large, so it is necessary to set up a top hole to the top arch or top arch end wall of each factory.
  • the construction channel can not be shared with other caverns on the façade and the plane. Therefore, the first main branch hole 41 is separately provided, and the top nuclear support hole of the first nuclear reactor building cavern is extracted. And the top nuclear support hole 43 of the second nuclear reactor building is respectively connected to the top arch arch of the corresponding nuclear reactor building cavern 1 with an elevation of +65.0 m.
  • the combination cavern, the electric house cavern 2, the pressure relief cavern 7 have different heights, but the height difference on the façade is small.
  • the three types of caverns share the third main branch hole 32 and the fourth main branch hole 33.
  • the electric power plant top support hole 34, the first pressure relief hole top support hole 35 and the second pressure relief hole top support hole 36 are separated from the two main support holes, and the second main support hole 31 is connected to each hole chamber respectively.
  • Arch height elevation Wherein, from the second main branch hole 31, the third main branch hole 32 and the fourth main branch hole 33 respectively to the top arch arch or the top arch end wall of the height of +48.0 m; from the third main branch
  • the hole 32 is located at the top of the electrical building, 34 is connected to the top arch of the electrical building, and the elevation is +37.0m; the third main branch 32 and the fourth main branch 33 are respectively set.
  • the pressure relief hole top branch hole 35 and the second pressure relief hole top branch hole 36 lead to the top arch arches of the two pressure relief holes 7 with an elevation of +52.0 m. Since the two combined chambers arranged in the double stack comprise a total of eight connected buildings and the axis is long, the second main branch 31, the third main branch 32 and the fourth main branch 33 are combined with the first combination.
  • the bottom hole 22 at the end of the chamber, the bottom hole 24 in the middle of the combined cavity and the bottom hole 28 at the end of the second combined cavity are used to increase the working face, balance the construction period, and facilitate the quick support of the top arch to ensure the arch construction. The period is stable and safe.
  • the longitudinal slope of each top hole is less than 9%, which meets the requirements of trackless transportation.

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Abstract

一种地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，包括核反应堆厂房洞室（1）、两个组合洞室、两个电气厂房洞室（2）、两个卸压洞室（7）、支交通洞（13）、侧交通洞（14）、第一主交通洞（8）、第二主交通洞（9）和第三主交通洞（10），第一主交通洞、第二主交通洞和第三主交通洞均与地表相通，核反应堆厂房洞室、组合洞室、电气厂房洞室和卸压洞室组成核岛厂房洞室群，核岛厂房洞室群各洞室的顶拱拱脚或顶拱端墙通过顶层支洞体系与地表相通，核岛厂房洞室群各洞室的边墙墙底通过底层支洞体系与第一主交通洞、第二主交通洞和第三主交通洞相连。该施工布置具有里程短、安全性好、施工方便、投资省、模块化程度高的特点。

Description

地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置 技术领域
本发明涉及核电工程技术领域，特别是涉及一种地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置。
背景技术
我国在“十二五”能源规划中提出要加快推进核电建设。然而在日本福岛核事故的影响下，刚从切尔诺贝利阴影中走出的全球核电产业又陷入了低谷。有鉴于此，国家对核电项目的审批更加严格和慎重，对核电厂的安全要求也提到了更高的地位。针对这种情况，地面核电站全部或部分置于地下的新型核电站布置结构为核电发展提供了新的思路。
就地下洞室群而言，水电站地下厂房洞室群已较常见，地下核电站洞室群的工程规模与水电地下厂房洞室群的工程规模也基本相当。但与水电站地下厂房洞室群相比较，可资利用的永久通道少，山体局部挖空率高，且核电工程对模块化要求程度高，故施工支洞的布置受到更多的限制。
如果地下核电站洞室群的施工支洞布置不当，容易影响主洞室的的稳定安全，同时造成施工不便，导致工期延误和投资增加。
发明内容
本发明的目的是为了克服上述背景技术的不足，提供一种地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，具有里程短、安全性好、施工方便、投资省、模块化程度高的特点。
本发明提供的一种地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，包括两个中轴线连线与山体纵深方向垂直的核反应堆厂房洞室，每个核反应堆厂房洞室两侧分别设有组合洞室与电气厂房洞室，两个组合洞室端部相连且布置方向与两个核反应堆厂房洞室的中轴线连线平行，两个电气厂房洞室布置方向与两个核反应堆厂房 洞室中轴线连线平行，每个组合洞室与其对应的电气厂房洞室之间设有卸压洞室，两个组合洞室中各洞室外侧分别通过支交通洞与位于两个组合洞室外侧的侧交通洞相连，所述侧交通洞的两端分别与沿山体纵深方向布置的第一主交通洞和第三主交通洞相连，所述第一主交通洞与第三主交通洞分别位于两个组合洞室两个端面的外侧，所述第一主交通洞与第三主交通洞之间设有沿山体纵深方向布置、且与连在一起的两个组合洞室中部相连的第二主交通洞，所述第一主交通洞、第二主交通洞和第三主交通洞均与地表相通，所述核反应堆厂房洞室、组合洞室、电气厂房洞室和卸压洞室组成核岛厂房洞室群，所述核岛厂房洞室群各洞室的顶拱拱脚或顶拱端墙通过用于施工的顶层支洞体系与地表相通，所述核岛厂房洞室群各洞室的边墙或端墙墙底通过作为出渣通道的底层支洞体系与第一主交通洞、第二主交通洞和第三主交通洞相连。
在上述技术方案中，所述顶层支洞体系包括第一主支洞、第一核反应堆厂房洞室顶层支洞、第二核反应堆厂房洞室顶层支洞、第二主支洞、第三主支洞、第四主支洞、电气厂房顶层支洞、第一卸压洞顶层支洞和第二卸压洞顶层支洞，所述第一主支洞、第二主支洞、第三主支洞和第四主支洞均沿山体纵深方向布置、且均与地表相通，所述第一主支洞的高程比第二主支洞、第三主支洞和第四主支洞的高程高，所述第一主支洞通过第一核反应堆厂房洞室顶层支洞和第二核反应堆厂房洞室顶层支洞分别与两个核反应堆厂房洞室的顶拱拱脚相连，所述第二主支洞和第四主支洞分别与连在一起的两个组合洞室两端的洞室顶拱端墙相连，所述第三主支洞与连在一起的两个组合洞室中部的的顶拱拱脚相连，所述第三主支洞的中段设有两条分别与两个电气厂房洞室顶拱端墙相连的电气厂房顶层支洞，所述第三主支洞上设有与一个卸压洞室顶拱拱脚相连的第一卸压洞顶层支洞，所述第四主支洞上设有与另一个卸压洞室顶拱拱脚相连的第二卸压洞顶层支洞，所述第一卸压洞顶层支洞位于电气厂房顶层支洞和组合洞室之间。
在上述技术方案中，所述顶层支洞体系中各顶层支洞纵坡均小于9％。
在上述技术方案中，所述底层支洞体系包括第一核反应堆厂房洞室底层支洞、第一组合洞室端部底层支洞、第一电气厂房底层支洞、组合洞室中段底层支洞、第一卸压洞底层支洞、第二核反应堆厂房洞室底层支洞、第二卸压洞底层支洞、第二组合洞室端部底层支洞和第二电气厂房底层支洞，所述第一主交通洞中段设有与一个电气厂房洞室端墙相连的第一电气厂房底层支洞，所述第二主交通洞中段设有与另一个电气厂房洞室端 墙相连的第二电气厂房底层支洞，所述第二主交通洞通过第一核反应堆厂房洞室底层支洞和第一卸压洞底层支洞分别与一个核反应堆厂房洞室的边墙底部和一个卸压洞室的底部相连，所述第三主交通洞通过第二核反应堆厂房洞室底层支洞和第二卸压洞底层支洞分别与另一个核反应堆厂房洞室的边墙底部和另一个卸压洞室的底部相连，所述第一主交通洞通过第一组合洞室端部底层支洞与连在一起的两个组合洞室一端的边墙底部相连，所述第二电气厂房底层支洞通过组合洞室中段底层支洞与连在一起的两个组合洞室中段的边墙底部相连，所述第二卸压洞底层支洞通过第二组合洞室端部底层支洞与连在一起的两个组合洞室另一端的边墙底部相连。
在上述技术方案中，所述底层支洞体系中各底层支洞纵坡均小于15％。
在上述技术方案中，所述每个组合洞室包括依次纵向连接的第一安全厂房洞室、核燃料厂房洞室、第二安全厂房洞室和核辅助厂房洞室，其中一个组合洞室的核辅助厂房洞室与另一个组合洞室的第一安全厂房洞室相连，所述第一组合洞室端部底层支洞与位于两个组合洞室端部的第一安全厂房洞室的边墙底部相连，所述组合洞室中段底层支洞与位于两个组合洞室中段的核辅助厂房洞室的边墙底部相连，所述第二组合洞室端部底层支洞与位于两个组合洞室另一端的核辅助厂房洞室的边墙底部相连；所述第二主支洞与位于两个组合洞室端部的第一安全厂房洞室的顶拱端墙相连，所述第四主支洞与位于两个组合洞室端部的核辅助厂房洞室的顶拱端墙相连，所述第三主支洞与位于两个组合洞室中段的核辅助厂房洞室的顶拱拱脚相连。
在上述技术方案中，每个核反应堆厂房洞室与其对应的电气厂房洞室之间通过与地表相连的主蒸汽通道相连，两个核反应堆厂房洞室均设有对应的设备通道与地表相通。
本发明地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，具有以下有益效果：本发明充分利用±0m高程的主交通洞设置各厂房洞室的底层支洞作为出渣通道，并从山外另设通往各厂房洞室的顶层支洞作为施工通道，各厂房洞室即可以最少的施工通道按溜井法组织施工(所谓溜井法是在开挖区上下通道之间竖向设置溜渣井，上面通道作为施工通道，施工中产生的渣滓通过溜渣井进入下面通道运出施工场所)。所以各厂房洞室均只设顶层和底层共两层支洞。所述顶层支洞体系通至各厂房顶拱。所述底层支洞体系通至各厂房墙底。由于卸压洞室的底高程与主交通洞高程相差达20m，难以布置合适纵坡的底层支洞，故以卸压洞底层支洞先水平通至卸压洞室中轴处，再在施工 过程中通过设溜渣竖井与卸压洞室底部衔接。
由核辅助厂房洞室、第二安全厂房洞室、核燃料厂房洞室和第一安全厂房洞室连成的组合洞室、核反应堆厂房洞室、电气厂房洞室以及卸压洞室，其底层设置的底层支洞均由主交通洞引出。由核辅助厂房洞室、第二安全厂房洞室、核燃料厂房洞室和第一安全厂房洞室连成的组合洞室、电气厂房洞室以及卸压洞室，其顶层设置的顶层支洞均由第二主支洞、第三主支洞和第四主支洞引出。
所述核反应堆厂房洞室的顶拱最高，立面上和平面上都无法与其他洞室共用施工通道，故单独设第一主支洞，再分岔引出两条核反应堆厂房洞室顶层支洞分别通至两个核反应堆厂房洞室的拱脚高程处。
本发明按溜井法施工设置的施工通道最少，具有里程短、安全性好、施工方便、投资省、模块化程度高的优点，满足了施工的总体要求。
附图说明
图1为本发明地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置中与底层支洞体系相关的结构示意图；
图2为本发明地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置中组合洞室、电气厂房洞室和卸压洞室及其相关的顶层支洞体系的结构示意图；
图3为本发明地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置中核反应堆厂房洞室及其相关的顶层支洞体系的结构示意图。
具体实施方式
下面结合附图及实施例对本发明作进一步的详细描述，但该实施例不应理解为对本发明的限制。
参见图1至图3，本发明地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，包括核反应堆厂房洞室1、组合洞室、电气厂房洞室2、卸压洞室7、第一主交通洞8、第二主交通洞9、第三主交通洞10、顶层支洞体系、底层支洞体系、主蒸汽通道11、设备通道12、支交通洞13和侧交通洞14。
所述核反应堆厂房洞室1为两个，两个核反应堆厂房洞室1的中轴线连线与山体纵 深方向垂直，每个核反应堆厂房洞室1两侧分别设有组合洞室与电气厂房洞室2。两个组合洞室端部相连且布置方向与两个核反应堆厂房洞室1的中轴线连线平行，两个电气厂房洞室2布置方向与两个核反应堆厂房洞室1中轴线连线平行。每个组合洞室与其对应的电气厂房洞室2之间设有卸压洞室7，两个组合洞室中各洞室外侧分别通过支交通洞13与位于两个组合洞室外侧的侧交通洞14相连。所述侧交通洞14的两端分别与沿山体纵深方向布置的第一主交通洞8和第三主交通洞10相连，所述第一主交通洞8与第三主交通洞10分别位于两个组合洞室两个端面的外侧。所述第一主交通洞8与第三主交通洞10之间设有沿山体纵深方向布置、且与连在一起的两个组合洞室中部相连的第二主交通洞9，所述第一主交通洞8、第二主交通洞9和第三主交通洞10均与地表相通。所述核反应堆厂房洞室1、组合洞室、电气厂房洞室2和卸压洞室7组成核岛厂房洞室群，所述核岛厂房洞室群各洞室的顶拱拱脚或顶拱端墙通过用于施工的顶层支洞体系与地表相通，所述核岛厂房洞室群各洞室的边墙或端墙墙底通过作为出渣通道的底层支洞体系与第一主交通洞8、第二主交通洞9和第三主交通洞10相连。
所述每个组合洞室包括依次纵向连接的第一安全厂房洞室3、核燃料厂房洞室4、第二安全厂房洞室5和核辅助厂房洞室6，其中一个组合洞室的核辅助厂房洞室6与另一个组合洞室的第一安全厂房洞室3相连。
所述顶层支洞体系包括第一主支洞41、第一核反应堆厂房洞室顶层支洞42、第二核反应堆厂房洞室顶层支洞43、第二主支洞31、第三主支洞32、第四主支洞33、电气厂房顶层支洞34、第一卸压洞顶层支洞35和第二卸压洞顶层支洞36。所述第一主支洞41、第二主支洞31、第三主支洞32和第四主支洞33均沿山体纵深方向布置、且均与地表相通，所述第一主支洞41的高程比第二主支洞31、第三主支洞32和第四主支洞33的高程高。所述第一主支洞41通过第一核反应堆厂房洞室顶层支洞42和第二核反应堆厂房洞室顶层支洞43分别与两个核反应堆厂房洞室1的顶拱拱脚相连。所述第二主支洞31与位于两个组合洞室端部的第一安全厂房洞室3的顶拱端墙相连，所述第四主支洞33与位于两个组合洞室端部的核辅助厂房洞室6的顶拱端墙相连，所述第三主支洞32与位于两个组合洞室中段的核辅助厂房洞室6的顶拱拱脚相连。所述第三主支洞32的中段设有两条分别与两个电气厂房洞室2顶拱端墙相连的电气厂房顶层支洞34。所述第三主支洞32上设有与一个卸压洞室7顶拱拱脚相连的第一卸压洞顶层支洞35，所述第四主支 洞33上设有与另一个卸压洞室7顶拱拱脚相连的第二卸压洞顶层支洞36，所述第一卸压洞顶层支洞35位于电气厂房顶层支洞34和组合洞室之间。所述顶层支洞体系中各顶层支洞纵坡均小于9％，以满足无轨运输要求。
所述底层支洞体系包括第一核反应堆厂房洞室底层支洞21、第一组合洞室端部底层支洞22、第一电气厂房底层支洞23、组合洞室中段底层支洞24、第一卸压洞底层支洞25、第二核反应堆厂房洞室底层支洞26、第二卸压洞底层支洞27、第二组合洞室端部底层支洞28和第二电气厂房底层支洞29。所述第一主交通洞8中段设有与一个电气厂房洞室2端墙相连的第一电气厂房底层支洞23，所述第二主交通洞9中段设有与另一个电气厂房洞室2端墙相连的第二电气厂房底层支洞29。所述第二主交通洞9通过第一核反应堆厂房洞室底层支洞21和第一卸压洞底层支洞25分别与一个核反应堆厂房洞室1的边墙底部和一个卸压洞室7的底部相连，所述第三主交通洞10通过第二核反应堆厂房洞室底层支洞26和第二卸压洞底层支洞27分别与另一个核反应堆厂房洞室1的边墙底部和另一个卸压洞室7的底部相连。所述第一主交通洞8通过第一组合洞室端部底层支洞22与位于两个组合洞室端部的第一安全厂房洞室3的边墙底部相连，所述第二电气厂房底层支洞29通过组合洞室中段底层支洞24与位于两个组合洞室中段的核辅助厂房洞室6的边墙底部相连，所述第二卸压洞底层支洞27通过第二组合洞室端部底层支洞28与位于两个组合洞室另一端的核辅助厂房洞室6的边墙底部相连。所述底层支洞体系中各底层支洞纵坡均小于15％，以满足无轨运输要求。
每个核反应堆厂房洞室1与其对应的电气厂房洞室2之间通过与地表相连的主蒸汽通道11相连，两个核反应堆厂房洞室1均设有对应的设备通道12与地表相通。所述主蒸汽通道11和设备通道12均可作为施工通道。
本实施例的地下核电站采用双堆CUP600布置，采用溜井法组织地下厂房洞室开挖，即从上部工作面组织开挖，通过出渣井溜渣从底部工作面组织出渣。按溜井法组织施工可以最少的施工通道满足施工要求，故本发明各厂房洞室只需设置顶层和底层两层支洞体系：底层支洞可充分利用已有的永久通道第一主交通洞8、第二主交通洞9和第三主交通洞10分岔布置；顶层支洞可通过第一主支洞41、第二主支洞31、第三主支洞32和第四主支洞33分岔布置，这有利于减少支洞的施工工程量。底层支洞体系和顶层支洞体系与周围洞室均保持适当的间距，以保证洞室群稳定安全。开挖的支洞少、里程短， 投资就省，同时支洞少、里程短、间距合适，整个工程的安全性也会更好；由于双堆CUP600地下核电站布置核岛厂房洞室群已做到模块化设计，故本发明结构的设计与施工可做到模块化。具体实施如下：
由于作为永久通道的第一主交通洞8、第二主交通洞9和第三主交通洞10以及可做为通道的主蒸汽通道11均布置在±0m高程，而各厂房洞室底高程均与此有较大的高差：比如核反应堆厂房洞室1底高程为－9.0m，组合洞室底高程为－12.5m，电气厂房洞室2底高程为－12.5m，卸压洞室底高程为+20.0m，所以在平面与立面上均不能直接利用作为永久通道的第一主交通洞8、第二主交通洞9和第三主交通洞10以及可做为通道的主蒸汽通道11。为满足各洞室底部的开挖出渣要求，需要布置底层支洞至各洞室底部；同时，为减小山体挖空率，减小影响各洞室稳定的不利因素，并减小底层支洞工程费用，不单独设底层主支洞，而是充分利用永久通道，由第一主交通洞8、第二主交通洞9和第三主交通洞10分岔引出布置各底层支洞21、22、23、24、25、26、27和28通至各洞室底高程处。其中，由于卸压洞室7的底高程与主交通洞高程相差达20m，难以布置合适纵坡的底层支洞，故以卸压洞底层支洞25，27先水平通至卸压洞室7中轴处，再在施工过程中通过设溜渣竖井与卸压洞室7底部衔接。以上各底层支洞纵坡均小于15％，满足无轨运输要求。
由于各厂房洞室顶高程较高且高矮不一：比如核反应堆厂房洞室1顶高程为+78.0m，组合洞室顶高程为+57.85m，电气厂房洞室2顶高程为+46.8m，卸压洞室顶高程为+62.0m，所以在平面与立面上均不能利用永久通道第一主交通洞8、第二主交通洞9和第三主交通洞10，另外设备通道12的高程为+20.0m，与各洞室的高差过大，故需要另设顶层支洞至各厂房顶拱拱脚或顶拱端墙。由于核反应堆厂房洞室1顶拱最高，立面上和平面上都无法与其他洞室共用施工通道，故单独设第一主支洞41，再分岔引出第一核反应堆厂房洞室顶层支洞42和第二核反应堆厂房洞室顶层支洞43分别通至对应的核反应堆厂房洞室1高程为+65.0m的顶拱拱脚处。组合洞室、电气厂房洞室2、卸压洞室7虽顶高程不同，但在立面上的高差较小，此三类洞室共用第三主支洞32、第四主支洞33，由两个主支洞分岔设电气厂房顶层支洞34、第一卸压洞顶层支洞35和第二卸压洞顶层支洞36，与第二主支洞31分别通至各洞室拱脚高程处。其中，从第二主支洞31、第三主支洞32和第四主支洞33分别通至高程为+48.0m的组合洞室顶拱拱脚或顶拱端墙；从第三主支 洞32分岔设电气厂房顶层支洞34通至电气厂房洞室2高程为+37.0m的顶拱拱脚处；从第三主支洞32和第四主支洞33分别分岔设第一卸压洞顶层支洞35和第二卸压洞顶层支洞36通至两个卸压洞室7高程为+52.0m的顶拱拱脚处。由于双堆布置的两个组合洞室共包括八个相连的厂房，轴线较长，故特别布置了第二主支洞31、第三主支洞32和第四主支洞33与第一组合洞室端部底层支洞22、组合洞室中段底层支洞24和第二组合洞室端部底层支洞28，以增加工作面，平衡工期，并利于顶拱快速支护以保证顶拱施工期稳定安全。其中各顶层支洞纵坡均小于9％，满足无轨运输要求。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。
本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。

Claims (7)

  1. 一种地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：包括两个中轴线连线与山体纵深方向垂直的核反应堆厂房洞室(1)，每个核反应堆厂房洞室(1)两侧分别设有组合洞室与电气厂房洞室(2)，两个组合洞室端部相连且布置方向与两个核反应堆厂房洞室(1)的中轴线连线平行，两个电气厂房洞室(2)布置方向与两个核反应堆厂房洞室(1)中轴线连线平行，每个组合洞室与其对应的电气厂房洞室(2)之间设有卸压洞室(7)，两个组合洞室中各洞室外侧分别通过支交通洞(13)与位于两个组合洞室外侧的侧交通洞(14)相连，所述侧交通洞(14)的两端分别与沿山体纵深方向布置的第一主交通洞(8)和第三主交通洞(10)相连，所述第一主交通洞(8)与第三主交通洞(10)分别位于两个组合洞室两个端面的外侧，所述第一主交通洞(8)与第三主交通洞(10)之间设有沿山体纵深方向布置、且与连在一起的两个组合洞室中部相连的第二主交通洞(9)，所述第一主交通洞(8)、第二主交通洞(9)和第三主交通洞(10)均与地表相通，所述核反应堆厂房洞室(1)、组合洞室、电气厂房洞室(2)和卸压洞室(7)组成核岛厂房洞室群，所述核岛厂房洞室群各洞室的顶拱拱脚或顶拱端墙通过用于施工的顶层支洞体系与地表相通，所述核岛厂房洞室群各洞室的边墙或端墙墙底通过作为出渣通道的底层支洞体系与第一主交通洞(8)、第二主交通洞(9)和第三主交通洞(10)相连。
  2. 根据权利要求1所述的地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：所述顶层支洞体系包括第一主支洞(41)、第一核反应堆厂房洞室顶层支洞(42)、第二核反应堆厂房洞室顶层支洞(43)、第二主支洞(31)、第三主支洞(32)、第四主支洞(33)、电气厂房顶层支洞(34)、第一卸压洞顶层支洞(35)和第二卸压洞顶层支洞(36)，所述第一主支洞(41)、第二主支洞(31)、第三主支洞(32)和第四主支洞(33)均沿山体纵深方向布置、且均与地表相通，所述第一主支洞(41)的高程比第二主支洞(31)、第三主支洞(32)和第四主支洞(33)的高程高，所述第一主支洞(41)通过第一核反应堆厂房洞室顶层支洞(42)和第二核反应堆厂房洞室顶层支洞(43)分别与两个核反应堆厂房洞室(1)的顶拱拱脚相连，所述第二主支洞(31)和 第四主支洞(33)分别与连在一起的两个组合洞室两端的洞室顶拱端墙相连，所述第三主支洞(32)与连在一起的两个组合洞室中部的的顶拱拱脚相连，所述第三主支洞(32)的中段设有两条分别与两个电气厂房洞室(2)顶拱端墙相连的电气厂房顶层支洞(34)，所述第三主支洞(32)上设有与一个卸压洞室(7)顶拱拱脚相连的第一卸压洞顶层支洞(35)，所述第四主支洞(33)上设有与另一个卸压洞室(7)顶拱拱脚相连的第二卸压洞顶层支洞(36)，所述第一卸压洞顶层支洞(35)位于电气厂房顶层支洞(34)和组合洞室之间。
  3. 根据权利要求2所述的地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：所述顶层支洞体系中各顶层支洞纵坡均小于9％。
  4. 根据权利要求2所述的地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：所述底层支洞体系包括第一核反应堆厂房洞室底层支洞(21)、第一组合洞室端部底层支洞(22)、第一电气厂房底层支洞(23)、组合洞室中段底层支洞(24)、第一卸压洞底层支洞(25)、第二核反应堆厂房洞室底层支洞(26)、第二卸压洞底层支洞(27)、第二组合洞室端部底层支洞(28)和第二电气厂房底层支洞(29)，所述第一主交通洞(8)中段设有与一个电气厂房洞室(2)端墙相连的第一电气厂房底层支洞(23)，所述第二主交通洞(9)中段设有与另一个电气厂房洞室(2)端墙相连的第二电气厂房底层支洞(29)，所述第二主交通洞(9)通过第一核反应堆厂房洞室底层支洞(21)和第一卸压洞底层支洞(25)分别与一个核反应堆厂房洞室(1)的边墙底部和一个卸压洞室(7)的底部相连，所述第三主交通洞(10)通过第二核反应堆厂房洞室底层支洞(26)和第二卸压洞底层支洞(27)分别与另一个核反应堆厂房洞室(1)的边墙底部和另一个卸压洞室(7)的底部相连，所述第一主交通洞(8)通过第一组合洞室端部底层支洞(22)与连在一起的两个组合洞室一端的边墙底部相连，所述第二电气厂房底层支洞(29)通过组合洞室中段底层支洞(24)与连在一起的两个组合洞室中段的边墙底部相连，所述第二卸压洞底层支洞(27)通过第二组合洞室端部底层支洞(28)与连在一起的两个组合洞室另一端的边墙底部相连。
  5. 根据权利要求4所述的地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：所述底层支洞体系中各底层支洞纵坡均小于15％。
  6. 根据权利要求4所述的地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：所述每个组合洞室包括依次纵向连接的第一安全厂房洞室(3)、核燃料厂房洞室(4)、第二安全厂房洞室(5)和核辅助厂房洞室(6)，其中一个组合洞室的核辅助厂房洞室(6)与另一个组合洞室的第一安全厂房洞室(3)相连，所述第一组合洞室端部底层支洞(22)与位于两个组合洞室端部的第一安全厂房洞室(3)的边墙底部相连，所述组合洞室中段底层支洞(24)与位于两个组合洞室中段的核辅助厂房洞室(6)的边墙底部相连，所述第二组合洞室端部底层支洞(28)与位于两个组合洞室另一端的核辅助厂房洞室(6)的边墙底部相连；所述第二主支洞(31)与位于两个组合洞室端部的第一安全厂房洞室(3)的顶拱端墙相连，所述第四主支洞(33)与位于两个组合洞室端部的核辅助厂房洞室(6)的顶拱端墙相连，所述第三主支洞(32)与位于两个组合洞室中段的核辅助厂房洞室(6)的顶拱拱脚相连。
  7. 根据权利要求1至6中任一项所述的地下核电站核岛厂房地下洞室群垂直于山体纵深方向的施工布置，其特征在于：每个核反应堆厂房洞室(1)与其对应的电气厂房洞室(2)之间通过与地表相连的主蒸汽通道(11)相连，两个核反应堆厂房洞室(1)均设有对应的设备通道(12)与地表相通。
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