WO2023202455A1 - 一种带接茬止水结构和注浆系统的单层井壁及其施工方法 - Google Patents

一种带接茬止水结构和注浆系统的单层井壁及其施工方法 Download PDF

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WO2023202455A1
WO2023202455A1 PCT/CN2023/088007 CN2023088007W WO2023202455A1 WO 2023202455 A1 WO2023202455 A1 WO 2023202455A1 CN 2023088007 W CN2023088007 W CN 2023088007W WO 2023202455 A1 WO2023202455 A1 WO 2023202455A1
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Prior art keywords
grouting
pipe
filling layer
well wall
layer
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PCT/CN2023/088007
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English (en)
French (fr)
Inventor
杨志江
杨维好
韩涛
张驰
张涛
骆汀汀
张雨
黄家会
丁莹
刘涛
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中国矿业大学
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Priority to CA3217077A priority Critical patent/CA3217077A1/en
Publication of WO2023202455A1 publication Critical patent/WO2023202455A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D5/00—Lining shafts; Linings therefor
    • E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete

Definitions

  • the invention relates to the technical field of mine construction engineering, and in particular to a single-layer well wall with a continuous water stop structure and a grouting system and a construction method thereof.
  • Double-layer composite well wall For water-rich rock formations, there are also projects that use double-layer reinforced concrete shaft walls without plastic interlayers (referred to as “double-layer shaft walls”).
  • double-layer shaft walls the main function of the outer well wall is to resist formation pressure and construction load during the construction period, and secondly, to resist formation pressure together with the inner well wall during the use period. Due to the presence of many construction stubbles, the outer well wall cannot resist underground water pressure.
  • the main function of the inner well wall is to resist groundwater pressure during the service period, and secondly, to resist formation pressure together with the outer well wall.
  • the thickness of the inner shaft wall designed according to current specifications increases rapidly as the depth of the shaft increases, resulting in shaft freezing, a sharp increase in the amount of excavation work, a substantial extension of the construction period, and This gives rise to serious problems such as crack prevention of large-volume concrete in the inner shaft wall.
  • the frozen well wall Judging from the development history of frozen well drilling technology in my country, the frozen well wall has developed from a single layer to a double layer. The main reason is that the single-layer well wall has poor water sealing performance. After the frozen wall thaws, groundwater flows into the wellbore through the well wall, affecting the wellbore. Normal use. If the water-sealing performance of a single-layer well wall can be improved, the well wall can be changed from a double-layer to a single-layer, thus solving the support problem of deep-frozen wells.
  • the main channel for water leakage from a single-layer well wall is the construction joint between the upper and lower sections of the well wall.
  • the patent "Single-layer well wall with joint plate and its construction method" (200610088128.3) provides a technical solution to improve the anti-seepage performance of the joint.
  • This patent adds a joint plate at the construction joint, changing the contact between the old and new concrete on the upper and lower shaft walls to the contact between the joint plate and the concrete, thereby reducing the permeability of the joint.
  • the present invention provides a single-layer well wall with a continuous water-stop structure and a grouting system and a construction method thereof.
  • This single-layer well wall has good overall water sealing performance, is easy to construct, and costs much less than double-layer well walls and double-layer composite well walls. It is suitable for wellbores dug by the freezing method, as well as by the common method or the grouting method. shaft.
  • a single-layer well wall with a joint water-stop structure and a grouting system is formed at the contact position between the upper and lower well walls.
  • a water-stop plate and a filling layer are provided on the outside of the joint. The water-stop plate and the The above-mentioned filling layers combine to form a single-layer well wall water-stop structure.
  • the filling layer grouting system includes a filling layer circumferential grouting pipe and a filling layer radial grouting pipe.
  • the filling layer circumferential grouting pipe is connected with the filling layer diameter.
  • the grouting pipe is connected to the pipeline, and the filling layer circumferential grouting pipe is laid in the filling layer.
  • the succession grouting system includes a succession grouting pipeline, the succession grouting pipeline includes a succession circumferential grouting pipe and a succession radial grouting pipe, the succession circumferential grouting pipe The grouting pipe is connected to the continuous radial grouting pipe.
  • the succession grouting system further includes a succession grout stopping pipeline, the succession grout stopping pipeline includes a succession grout stopping pipe and a succession grout stopping pipe joint, and the succession grout stopping pipe joint is installed on the succession grout stopping pipe.
  • the continuous grouting pipe is located on the side of the wellbore center of the continuous circumferential grouting pipe.
  • a construction method for a single-layer well wall with a continuous water-stop structure and a grouting system including the following steps:
  • the water stop plate should be divided into blocks according to the wellbore engineering conditions and construction equipment conditions, and the number of blocks should be reduced as much as possible to reduce underground joints.
  • step S3 the specific steps for laying the filling layer grouting system and the succession grouting system in step S3 are as follows:
  • step S5 is followed by step S6, which is to select an opportunity to perform grouting after the well wall is constructed to the designed depth, or to perform grouting after constructing several sections of the well wall until the well wall is constructed to the designed depth.
  • the waterstop plate and the filling layer in the present invention jointly form a waterstop structure at the joint position of the adjacent section well wall.
  • the filling layer grouting system and joint grouting system further enhance the water-stopping performance of the joint position.
  • the single-layer well wall provided by the present invention has good overall water-sealing performance, is easy to construct, and has a cost far lower than that of double-layer well walls and double-layer composite well walls. It is suitable for wellbores dug by the freezing method, as well as by common methods or injection methods. Wellbore dug by slurry method.
  • Figure 1 is a schematic structural diagram of a single-layer well wall with a continuous water stop structure and a grouting system.
  • Figure 2 is a top view of a single-layer well wall with a continuous water stop structure and a grouting system.
  • a single-layer well wall with a joint water-stop structure and a grouting system forms a joint 3 at the contact position between the upper well wall 1 and the lower well wall 2.
  • This joint is not actively set, and is due to top
  • the construction technology of segmented excavation and pouring of the shaft wall is inevitable.
  • a water-stop plate 4 and a filling layer 5 are provided outside the joint 3.
  • the water-stop plate 4 and the filling layer 5 jointly form a single-layer well wall water-stop structure.
  • the water stop plate 4 can be a steel plate or a corrugated plate, and the filling layer 5 can be filled with a certain grade of coarse aggregate, such as gravel, rice stone, coarse sand, etc.
  • the single-layer well wall with a continuous water stop structure and a grouting system also includes a filling layer grouting system.
  • the grouting system consists of at least one filling layer grouting pipeline, and each filling layer grouting pipeline includes a filling layer circumferential direction.
  • the circumferential grouting pipe 51 of the filling layer can be a metal pipe or a plastic pipe.
  • the circumferential grouting pipe 51 of the filling layer is punched and temporarily blocked (such as using cement, tape, etc.); the circumferential grouting pipe 51 of the filling layer can also be used.
  • the finished product is maintainable with repeatable grouting pipes.
  • the function of the filling layer radial grouting pipe 52 is to radially pass through the well wall and lead the filling layer circumferential grouting pipe 51 to the inside of the well wall to facilitate grouting in the wellbore.
  • the radial grouting pipe 52 of the filling layer can be arranged on the upper or lower well wall as needed.
  • the radial grouting pipe 52 of the filling layer can be a steel pipe or a high-pressure hose, with a threaded or quick-plug joint left on the side of the well core. In order to connect the grouting equipment for grouting.
  • the filling layer grouting system can inject grouting into the filling layer 5, so that the water stop layer of the filling layer 5 and the water stop plate 4 combine to form a good joint water stop structure.
  • the filling layer grouting system can also inject grouting into the well wall and the formation, between the well and the well.
  • the holes (cracks) in the formation near the wall and the small cracks in the well wall are grouted to fill the penetration channels of groundwater to the well wall.
  • the grouting slurry for filling layer 5 can be cement-based slurry, chemical slurry, micro-expansion slurry, etc.
  • the single-layer well wall with a continuous water stop structure and a grouting system also includes a continuous grouting system, and the continuous grouting system includes at least one continuous grouting pipeline.
  • the succession grouting pipeline includes a succession circumferential grouting pipe 31 and a succession radial grouting pipe 32.
  • the succession circumferential grouting pipe 31 is connected to the succession radial grouting pipe 32.
  • the position of the succession circumferential grouting pipe 31 is and quantity can be arranged according to needs, not necessarily arranged at the bottom of Continuation 3.
  • the continuous radial grouting pipe 32 can be installed on the top surface of the water stop plate 4 during the construction of the upper section of the well wall 1, or can be installed on the bottom surface of the water stop plate during the construction of the lower section of the well wall 2.
  • the continuous circumferential grouting pipe 31 can be a metal pipe or a plastic pipe.
  • the continuous circumferential grouting pipe 31 is drilled and then faces Temporary sealing (such as using cement, tape, etc.); finished and maintainable repeatable grouting pipes can also be used.
  • the continuous radial grouting pipe 32 can be a steel pipe or a high-pressure hose, and a threaded or quick-plug joint is left on the side of the well center to facilitate the connection of grouting equipment for grouting.
  • the succession grouting system also includes at least one succession grout stopping pipeline.
  • the succession grout stopping pipeline includes a succession grout stopping pipe 311 and a succession grout stopping pipe joint 312.
  • the succession grout stopping pipe joint 312 is installed on the succession grout stopping pipe 311.
  • the slurry pipe 311 is located inside the stubble 3 .
  • the slurry-stopping pipe 311 can be a pressure expansion pipe, such as PVC plastic-coated irrigation hose or flexible hose, etc.
  • the slurry-stopping pipe joint 312 can be a steel pipe or a high-pressure hose, with a threaded or quick-plug joint left on the side of the well center. In order to connect the grouting equipment for water injection, the continuous grout stop pipe 311 expands under the action of hydraulic pressure.
  • the joint grouting system can grout the possible gaps between the joint 3, the water-stop plate 4 and the well wall (upper well wall 1 and lower well wall 2), further improving the impermeability and water-stopping structure of the well wall joint 3 water-stopping effect.
  • the grouting slurry for Continuation 3 can be cement-based slurry, chemical slurry, micro-expansion slurry, etc. When joint 3 is grouted, the slurry may diffuse inward along joint 3 and flow into the wellbore.
  • the well walls (upper and lower well walls) can be equipped with steel bars, and the well wall concrete can be mixed with expansion agents, fibers, etc. to reduce cracks and reduce the permeability of the well wall body.
  • a small amount of small cracks can be filled through the filling layer grouting system to increase the grouting pressure and be filled during the filling layer 5 grouting.
  • a construction method for a single-layer well wall with a continuous water-stop structure and a grouting system including the following steps:
  • the filling layer circumferential grouting pipe 51 and the filling layer radial grouting pipe 52 are connected during ground prefabrication, and the reserved connection joints between the filling layer radial grouting pipe 52 and the grouting equipment are well protected.
  • the continuous circumferential grouting pipe 31 and the continuous radial grouting pipe 32 of each continuous grouting system are connected during ground prefabrication, and the reserved connection joints between the continuous radial grouting pipe 32 and the grouting equipment are prepared. Protect.
  • the filling layer radial grouting pipe 52 of each filling layer 5 grouting pipeline and the continuous radial grouting pipe 32 of each successive grouting system are firmly tied to the steel bars at the designed position.
  • the filling layer radial grouting pipe 52 and the continuous radial grouting pipe 32 should be close to the core end of the well to ensure that they are easy to find after demoulding.
  • the stubble stopper pipe joint 312 Lay the stubble stopper pipe 311 and the stubble stopper pipe joint 312 according to the designed position; the stubble stopper pipe joint 312 is firmly tied to the steel bar, and the end near the center of the well should be close to the standing mold to ensure that it is easy to find after demoulding.

Abstract

本发明公开一种带接茬止水结构和注浆系统的单层井壁及其施工方法，属于矿山建设工程技术领域，在上段井壁和下段井壁的接触位置形成接茬，在接茬的外侧设置止水板和充填层，所述止水板和所述充填层联合组成单层井壁的止水结构。本发明提供的单层井壁具有良好的整体封水性能，施工方便，造价远低于双层井壁和双层复合井壁，既适用于冻结法开凿的井筒，也适用于普通法或注浆法开凿的井筒。

Description

一种带接茬止水结构和注浆系统的单层井壁及其施工方法 技术领域
本发明涉及矿山建设工程技术领域，特别是涉及一种带接茬止水结构和注浆系统的单层井壁及其施工方法。
背景技术
我国富水地层中的井筒多采用人工冻结法进行开凿，主流的支护结构为带塑料夹层的双层钢筋混凝土复合井壁(简称“双层复合井壁”)。对于富水岩层，也有工程采用不带塑料夹层的双层钢筋混凝土井壁(简称“双层井壁”)。这两种井壁结构中，外层井壁的主要作用是在施工期抵抗地层压力和施工荷载，其次是在使用期与内层井壁共同抵抗地层压力。由于存在较多施工接茬，故外层井壁不能抵抗地下水压。内层井壁的主要作用是在使用期抵抗地下水压力，其次是与外层井壁共同抵抗地层压力。
无论双层井壁还是双层复合井壁，按现行规范设计的内层井壁厚度均随着井筒深度增加而快速增长，从而导致井筒冻结和掘砌工程量剧增、施工工期大幅延长，并衍生出严峻的内层井壁大体积混凝土防裂等难题。
从我国冻结凿井技术的发展历史看，冻结井壁从单层发展为双层，其主要原因是单层井壁封水性能差，冻结壁解冻后地下水通过井壁涌入井筒内，影响井筒正常使用。如果能够提升单层井壁的封水性能，则可将井壁从双层重新变为单层，从而解决深冻结井的支护难题。
单层井壁渗漏水的主要通道是上下段井壁的施工接茬，专利“带接茬板的单层井壁及其施工方法”(200610088128.3)提供了一种提高接茬抗渗性能的技术方案。该专利在施工接茬处增设接茬板，变上下段井壁新老混凝土接触为接茬板和混凝土接触，从而降低接茬处的渗透性。
发明内容
有鉴于此，本发明提供一种带接茬止水结构和注浆系统的单层井壁及其施工方法。这种单层井壁整体封水性能好，施工方便，造价远低于双层井壁和双层复合井壁，既适用于冻结法开凿的井筒，也适用于普通法或注浆法开凿的井筒。
为了实现上述目的，本发明采用如下技术方案：
一种带接茬止水结构和注浆系统的单层井壁，在上段井壁和下段井壁的接触位置形成接茬，在接茬的外侧设置止水板和充填层，所述止水板和所述充填层联合组成单层井壁的止水结构。
进一步地，还包括充填层注浆系统，所述充填层注浆系统包括充填层环向注浆管和充填层径向注浆管，所述充填层环向注浆管与所述充填层径向注浆管管路连接，所述充填层环向注浆管铺设在所述充填层中。
进一步地，还包括接茬注浆系统，所述接茬注浆系统包括接茬注浆管路，所述接茬注浆管路包括接茬环向注浆管和接茬径向注浆管，所述接茬环向注浆管与所述接茬径向注浆管管路连接。
进一步地，所述接茬注浆系统还包括接茬止浆管路，所述接茬止浆管路包括接茬止浆管和接茬止浆管接头，所述接茬止浆管接头安装在所述接茬止浆管上，所述接茬止浆管位于所述接茬环向注浆管的靠井筒中心侧。
一种带接茬止水结构和注浆系统的单层井壁的施工方法，包括如下步骤：
S1、掘进一个施工段高，将刃脚模板位置工作面操平，下放刃脚模板并调平找正；
S2、将地面预制好的止水板运至井下，铺设于设计位置；调整拼接间隙，将止水板连接成整体；
S3、填充充填层，并铺设充填层注浆系统和接茬注浆系统；
S4、下落立模并调平找正，浇筑井壁混凝土；
S5、重复步骤S1～S4步，进入下一个掘砌循环。
进一步地，所述步骤S2中，预制止水板时应根据井筒工程条件和施工设备条件分块，尽量减少分块数，以减少井下接缝。
进一步地，所述步骤S3中铺设充填层注浆系统和接茬注浆系统的具体步骤如下：
S31、采用设计的材料充填止水板与井帮之间的空隙，形成充填层；同步按设计位置铺设充填层环向注浆管，充填层环向注浆管和充填层径向注浆管在地面预制时连接好，并做好充填层径向注浆管预留的与注浆设备的连接头的保护；
S32、按设计位置铺设接茬环向注浆管，每路接茬注浆管路的接茬环向注浆管和接茬径向注浆管在地面预制时连接好，并做好接茬径向注浆管预留的与注浆设备的连接头的保护；
S33、绑扎钢筋；同步将充填层径向注浆管和接茬径向注浆管在设计位置与钢筋牢固绑扎，充填层径向注浆管和接茬径向注浆管靠井心端应紧贴立模，确保脱模后方便找出；
S34、按设计位置铺设接茬止浆管和接茬止浆管接头；接茬止浆管接头与钢筋牢固绑扎，靠井心端应紧贴立模，确保脱模后方便找出。
进一步地，步骤S5之后还包括步骤S6，在井壁施工至设计深度后择机进行注浆，或在施工数段井壁后进行注浆，直至井壁施工至设计深度。
本发明的有益效果在于：
本发明中的止水板和充填层联合组成相邻段井壁的接茬位置的止水结 构，充填层注浆系统和接茬注浆系统进一步增强了接茬位置的止水性能。本发明提供的单层井壁具有良好的整体封水性能，施工方便，造价远低于双层井壁和双层复合井壁，既适用于冻结法开凿的井筒，也适用于普通法或注浆法开凿的井筒。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为带接茬止水结构和注浆系统的单层井壁的结构示意图。
图2为带接茬止水结构和注浆系统的单层井壁的俯视图。
其中，图中：
1-上段井壁、2-下段井壁、3-接茬、31-接茬环向注浆管、32-接茬径向
注浆管、311-接茬止浆管、312-接茬止浆管接头、4-止水板、5-充填层、51-充填层环向注浆管、52-充填层径向注浆管。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1
参照图1和图2所示，一种带接茬止水结构和注浆系统的单层井壁，在上段井壁1和下段井壁2的接触位置形成接茬3，该接茬非主动设置，是由于自上 而下分段掘进和浇筑井壁的施工工艺必然形成的。在接茬3的外侧设置止水板4和充填层5，止水板4和充填层5联合组成单层井壁的止水结构。止水板4可为钢板或波纹板，充填层5可充填一定级配的粗集料，如碎石、米石、粗砂等。
带接茬止水结构和注浆系统的单层井壁还包括充填层注浆系统，该注浆系统由至少包括一路充填层注浆管路，每路充填层注浆管路包括充填层环向注浆管51和充填层径向注浆管52。充填层环向注浆管51可采用金属管或塑料管，充填层环向注浆管51打孔后临时封堵(如用胶泥、胶带等)；充填层环向注浆管51也可采用成品可维护重复式注浆管。充填层径向注浆管52的作用是径向穿过井壁，将充填层环向注浆管51引到井壁内侧，以方便在井筒内进行注浆。充填层径向注浆管52根据需要可布置在上段井壁或下段井壁，充填层径向注浆管52可采用钢管或高压胶管，靠井心侧留有丝扣或快插式接头，以便连接注浆设备进行注浆。
通过充填层注浆系统可向充填层5注浆，使充填层5止水层与止水板4联合组成良好的接茬止水结构，充填层注浆系统还可向井壁和地层之间、井壁附近地层的孔(裂)隙以及井壁的细小裂纹注浆，充填地下水向井壁的渗透通道。充填层5注浆浆液可采用水泥基浆液、化学浆液、微膨胀浆液等。
带接茬止水结构和注浆系统的单层井壁还包括接茬注浆系统，接茬注浆系统包括至少一路接茬注浆管路。接茬注浆管路包括接茬环向注浆管31和接茬径向注浆管32，接茬环向注浆管31与接茬径向注浆管32管路连接，接茬环向注浆管31的位置和数量可根据需要布置，不一定布置在接茬3的底部。接茬径向注浆管32可在上段井壁1施工时安装在止水板4顶面，也可以在下段井壁2施工时安装在止水板底面。
接茬环向注浆管31可采用金属管或塑料管，接茬环向注浆管31打孔后临 时封堵(如用胶泥、胶带等)；也可采用成品可维护重复式注浆管。接茬径向注浆管32可采用钢管或高压胶管，靠井心侧留有丝扣或快插式接头，以便连接注浆设备进行注浆。
接茬注浆系统还包括至少一路接茬止浆管路，接茬止浆管路包括接茬止浆管311和接茬止浆管接头312，接茬止浆管接头312安装在接茬止浆管311上，接茬止浆管311位于接茬3的内侧。接茬止浆管311可采用压力膨胀管，如PVC涂塑灌溉水带或柔性胶管等，接茬止浆管接头312可采用钢管或高压胶管，靠井心侧留有丝扣或快插式接头，以便连接注浆设备进行注水，使得接茬止浆管311在液压作用下膨胀。
通过接茬注浆系统可向接茬3、止水板4与井壁(上段井壁1和下段井壁2)间可能存在的间隙注浆，进一步提高井壁接茬3的抗渗性和止水结构的止水效果。接茬3注浆浆液可采用水泥基浆液、化学浆液、微膨胀浆液等。接茬3注浆时，浆液可能沿接茬3向内扩散而流入井筒内，因此，通过接茬注浆系统对接茬3进行注浆前，需先向接茬止浆管路注水，使得接茬止浆管311在水压作用下膨胀，在接茬止浆管311处形成止浆塞，从而阻止接茬3注浆时浆液流向井内。
井壁(上段井壁和下段井壁)可配置钢筋，井壁混凝土可掺入膨胀剂、纤维等，以减少减小裂纹，降低井壁本体的渗透性。少量的细小裂纹可通过充填层注浆系统，提高注浆压力，在充填层5注浆时得到充填。
实施例2
一种带接茬止水结构和注浆系统的单层井壁的施工方法，包括如下步骤：
掘进一个施工段高，将刃脚模板位置工作面操平，下放刃脚模板并调平找正；将地面预制好的止水板4运至井下，铺设于设计位置；调整拼接间隙， 将止水板4焊接成整体；预制时止水板4应根据井筒工程条件和施工设备条件分块，尽量减少分块数，以减少井下焊缝。
采用设计的材料充填止水板4与井帮之间的空隙，形成充填层5，同步按设计位置铺设充填层环向注浆管51。
充填层环向注浆管51和充填层径向注浆管52在地面预制时连接好，并做好充填层径向注浆管52预留的与注浆设备的连接接头的保护。
按设计位置铺设接茬环向注浆管31；
每路接茬注浆系统的接茬环向注浆管31和接茬径向注浆管32在地面预制时连接好，并做好接茬径向注浆管32预留的与注浆设备的连接接头的保护。
绑扎钢筋。同步将每路充填层5注浆管路的充填层径向注浆管52和每路接茬注浆系统的接茬径向注浆管32在设计位置与钢筋牢固绑扎，充填层径向注浆管52和接茬径向注浆管32靠井心端应紧贴立模，确保脱模后方便找出。
按设计位置铺设接茬止浆管311和接茬止浆管接头312；接茬止浆管接头312与钢筋牢固绑扎，靠井心端应紧贴立模，确保脱模后方便找出。
下落立模并调平找正，浇筑井壁混凝土；
重复上述步骤，进入下一个掘砌循环；
在井壁施工至设计深度后择机进行注浆；或在施工数段(段数由设计确定)井壁后进行注浆，直至井壁施工至设计深度。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用 本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (5)

  1. 一种带接茬止水结构和注浆系统的单层井壁，在上段井壁和下段井壁的接触位置形成接茬，其特征在于，在接茬的外侧设置止水板和充填层，所述止水板和所述充填层联合组成单层井壁的止水结构；
    还包括接茬注浆系统，所述接茬注浆系统包括接茬注浆管路，所述接茬注浆管路包括接茬环向注浆管和接茬径向注浆管，所述接茬环向注浆管与所述接茬径向注浆管管路连接；
    所述接茬注浆系统还包括接茬止浆管路，所述接茬止浆管路包括接茬止浆管和接茬止浆管接头，所述接茬止浆管接头安装在所述接茬止浆管上，所述接茬止浆管位于所述接茬环向注浆管的靠井筒中心侧。
  2. 根据权利要求1所述的一种带接茬止水结构和注浆系统的单层井壁，其特征在于，还包括充填层注浆系统，所述充填层注浆系统包括充填层环向注浆管和充填层径向注浆管，所述充填层环向注浆管与所述充填层径向注浆管管路连接，所述充填层环向注浆管铺设在所述充填层中。
  3. 一种带接茬止水结构和注浆系统的单层井壁的施工方法，其特征在于，包括如下步骤：
    S1、掘进一个施工段高，将刃脚模板位置工作面操平，下放刃脚模板并调平找正；
    S2、将地面预制好的止水板运至井下，铺设于设计位置；调整拼接间隙，将止水板连接成整体；
    S3、填充充填层，并铺设充填层注浆系统和接茬注浆系统；
    铺设充填层注浆系统和接茬注浆系统的具体步骤如下：
    S31、采用设计的材料充填止水板与井帮之间的空隙，形成充填层；同步按设计位置铺设充填层环向注浆管，充填层环向注浆管和充填层径向注浆管在地面预制时连接好，并做好充填层径向注浆管预留的与注浆设备的连接头的保护；
    S32、按设计位置铺设接茬环向注浆管，每路接茬注浆管路的接茬环向注浆管和接茬径向注浆管在地面预制时连接好，并做好接茬径向注浆管预留的与注浆设备的连接头的保护；
    S33、绑扎钢筋；同步将充填层径向注浆管和接茬径向注浆管在设计位置与钢筋牢固绑扎，充填层径向注浆管和接茬径向注浆管靠井心端应紧贴立模，确保脱模后方便找出；
    S34、按设计位置铺设接茬止浆管和接茬止浆管接头；接茬止浆管接头与钢筋牢固绑扎，靠井心端应紧贴立模，确保脱模后方便找出；
    S4、下落立模并调平找正，浇筑井壁混凝土；
    S5、重复步骤S1～S4步，进入下一个掘砌循环。
  4. 根据权利要求3所述的一种带接茬止水结构和注浆系统的单层井壁的施工方法，其特征在于，所述步骤S2中，预制止水板时应根据井筒工程条件和施工设备条件分块，尽量减少分块数，以减少井下接缝。
  5. 根据权利要求3所述的一种带接茬止水结构和注浆系统的单层井壁的施工方法，其特征在于，步骤S5之后还包括步骤S6，在井 壁施工至设计深度后择机进行注浆，或在施工数段井壁后进行注浆，直至井壁施工至设计深度。
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