WO2020007088A1 - 一种基于高恒阻机械式单体支架耦合支护结构及施工方法 - Google Patents

一种基于高恒阻机械式单体支架耦合支护结构及施工方法 Download PDF

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WO2020007088A1
WO2020007088A1 PCT/CN2019/082156 CN2019082156W WO2020007088A1 WO 2020007088 A1 WO2020007088 A1 WO 2020007088A1 CN 2019082156 W CN2019082156 W CN 2019082156W WO 2020007088 A1 WO2020007088 A1 WO 2020007088A1
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constant
cylinder
resistance mechanical
inter
frame
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French (fr)
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陈彦龙
吴鹏
樊进城
巨峰
程绍文
蒋梦来
胡继强
兰东昊
张亚雪
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts

Definitions

  • the invention relates to the technical field of soft rock roadway support, in particular to a high-constant-resistance mechanical single-frame coupling support structure and construction method for supporting large deformed soft rock roadways in underground mining or rock engineering.
  • the main support technologies used are anchor shotcrete support technology, anchor mesh shotcrete support technology, prestressed anchor cable support technology, steel frame shed support technology, pressure relief support technology, steel bars Concrete support technology, stone-masonry concrete support technology, etc.
  • active support such as anchor rods can only act on surrounding rock fractured and plastic areas, which is difficult to play the role of suspension load; passive support such as steel frame sheds have higher costs and input-output The ratio is unreasonable, the stability is poor, and the construction speed is slow.
  • the flexible support structure has a small support strength and cannot effectively control the continuous deformation of the roadway; the rigid support structure has a small support range and it is difficult to form an overall rigid support.
  • a coupling support structure and construction method based on a high constant resistance mechanical single-frame support are provided, and active and passive support of a soft rock roadway is provided at the same time, so that the soft rock roadway can fully release the surrounding rock deformation. Yes, and provide sufficient support to control the surrounding rock deformation of the roadway.
  • a coupling support structure based on a high-constant-resistance mechanical single-unit support comprising a number of high-constant-resistance mechanical single-unit supports and inter-rods;
  • the high-constant-resistance mechanical single-unit support includes two circular arc-shaped columns arranged symmetrically above and below. , And two circular arc-shaped poles arranged symmetrically on the left and right sides; the inside of the end of the cylinder is an inverted conical surface, and two ends of the pole are respectively sleeved with the bearing bead frame and extend into the bearing bead frame together with the bearing bead frame.
  • the cylinder and the pole form a ring-shaped frame structure connected end to end; the plurality of high-constant-resistance mechanical single-unit brackets are arranged coaxially in parallel, and two adjacent single-unit brackets pass through four symmetrical frames along the circumference.
  • the tie rod is fixed.
  • the inter-frame tie rod comprises a connecting rod and a cylinder clamping collar located at both ends of the connecting rod, and the cylinder clamping collar is clamped on the outside of the cylinder by a bolt and nut and is located at The connection between the pole and the cylinder is described.
  • a construction method based on a high-constant-resistance mechanical single-bracket coupling support structure includes the following steps:
  • Step 1 Spray 50-100mm thick concrete spraying layer on the cross section of the roadway;
  • Step 2 Drive the bolts and cables evenly into the surrounding rock of the roadway;
  • the anchors are high-strength prestressed anchors with a diameter of 20-25mm, a length of 2000-2800mm, and a row spacing of 800 ⁇ 800mm
  • the prestress is 60-80kN;
  • the anchor cable is a high-strength prestressed anchor cable with a diameter of 18-22mm, a length of 6000-9000mm, a row spacing of 1000 ⁇ 1600mm, and a prestress of greater than 160kN;
  • Step 3 Install a high-constant-resistance mechanical monolithic bracket.
  • the specific installation steps are as follows: a bearing bead frame is sleeved at each end of the two poles on both sides, and the bearing bead frame is 50-100mm away from the end of the pole, and the two cylinders are placed on the roadway. At the bottom plate, insert the pole and the bearing bead into the upper cylinder, then rotate the connected pole and cylinder axially along the roadway, and connect the lower cylinder with the poles on both sides.
  • Step 4 Re-spray 30-50mm thick concrete spray layer to make the concrete spray layer fully contact with the high constant resistance mechanical single support.
  • each end of the inter-frame tie rod has a cylinder clamping collar, and the cylinder clamping collar is an opening and closing collar.
  • Bolt holes are provided on both sides of each opening and closing collar. Tight bolts and clamping nuts are connected and separated from the bolt holes to control the closing and opening of the cylinder clamping collar, and the inter-frame pull rods are fixed at the joints of the cylinder and cylinder.
  • the materials of the concrete spray layer in step 1 and step 4 are the same, the mixing ratio is cement: water: sand 1: 2: 2, and the content of the accelerator is 2.6% of the amount of cement.
  • the working resistance of the high constant resistance mechanical single support depends on the material properties of the bearing bead frame and the steel pipe itself. It is not affected by other external factors such as installation and environment, and can make full use of the mechanical strength of the cylinder and the rod itself.
  • the present invention provides a support structure and construction method based on a high-constant-resistance mechanical single-frame support coupling, which reflects the support concept of "first lord, then quilt, first quilt, first flexible, rigid, flexible and flexible” , Can make the soft rock roadway fully release the surrounding rock deformation energy, and provide sufficient support to control the roadway surrounding rock deformation.
  • FIG. 1 is a schematic diagram of a coupled support structure of a high-constant-resistance mechanical single-body support in an embodiment
  • FIG. 2 is a schematic view of a structural system of a high-constant-resistance mechanical single-body support in an embodiment
  • FIG. 3 is a schematic structural diagram of an inter-rack tie rod in an embodiment
  • FIG. 4 is a schematic view of a bearing bead frame connection structure in the embodiment.
  • a coupling support structure based on a high-constant-resistance mechanical single-unit stent includes a high-constant-resistance mechanical single-unit stent structure system.
  • the high-constant-resistance mechanical single-unit stent structure system is composed of several high-constant-resistance mechanical single-unit stent and inter-frame tie rods, as shown in Figure 2. Show.
  • the high-constant-resistance mechanical single-body support is composed of two circular-arc columns 1 symmetrically arranged up and down, and two circular-arc columns 2 symmetrically arranged left and right.
  • the diameter of the cylinder is larger than the diameter of the pole.
  • the inside of the end of the cylinder 1 is an inverted conical surface.
  • the two ends of the pole 2 are respectively sleeved with the bearing bead frame 8 and protrude into the end of the cylinder 1 with the bearing bead frame 8 as shown in Figure 4.
  • the cylinder 1 and the pole 2 form a ring-shaped frame structure connected end to end.
  • Several high-constant-resistance mechanical unit brackets are coaxially arranged in parallel, and two adjacent unit brackets are connected and fixed by four inter-frame tie rods 3 that are symmetrical around the circumference.
  • each end of the inter-rack tie rod 3 has a cylinder clamping collar 9 and the cylinder clamping collar 9 is an opening and closing collar.
  • Bolt holes are provided on both sides of each opening and closing collar. Through the connection and separation of the clamping bolt 10 and the clamping nut 11 from the bolt hole, the closing and opening of the cylinder clamping collar 9 is controlled.
  • the cylinder clamping collar 9 is clamped on the outside of the cylinder by a clamping bolt 10 and a clamping nut 11, and an inter-frame tie rod 3 is fixed at the connection between the cylinder 2 and the cylinder 1.
  • a construction method based on a high-constant-resistance mechanical single-bracket coupling support structure includes the following steps:
  • Step 1 According to the design requirements of the roadway, excavate the roadway, spray 50-100mm thick concrete spraying layer 4 on the roadway section, close the exposed surface of the surrounding rock, and provide early flexible support.
  • Step 2 The anchor rod 6 and the anchor cable 7 are evenly driven into the surrounding rock of the roadway in a radial pattern.
  • Anchor rod 6 is a high-strength prestressed anchor rod with a diameter of 20-25mm, a length of 2000-2800mm, a row spacing of 800 ⁇ 800mm, and a prestress of 60-80kN;
  • the anchor cable 7 is a high-strength prestressed anchor cable with a diameter It is 18-22mm, the length is 6000-9000mm, the interval is 1000 ⁇ 1600mm, and the prestress is greater than 160kN.
  • the anchor rock 6 and the anchor cable 7 are used to fix the surrounding rock to the deep hard rock mass, and to strengthen the surrounding rock so that the surrounding rock can fully exert its autonomous bearing capacity.
  • Step 3 Install the high constant resistance mechanical single bracket.
  • the specific installation steps are as follows: a bearing bead holder 8 is sleeved at each end of the pole 2 on both sides, and the bearing bead holder 8 is 50-100 mm away from the end of the pole 2; the two cylinders 1 are placed on the floor of the roadway; the pole 2 Insert the bearing bead frame 8 into the upper column cylinder 1, and then rotate the connected column rod 2 and the column cylinder 1 along the roadway axially at a certain angle, and connect the lower column cylinder 1 with the column rods 2 on both sides.
  • Step 4 Re-spray 30-50mm thick concrete spray layer 5 so that the concrete spray layer 5 is in full contact with the high constant resistance mechanical monolithic support to form a soft rock roadway based on the high constant resistance mechanical monolithic support coupling support structure, as shown in Figure 1. .
  • the materials of the concrete spraying layer in step 1 and step 4 are the same, the mixing ratio is cement: water: sand 1: 2: 2, and the content of the accelerator is 2.6% of the cement amount.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

一种基于高恒阻机械式单体支架耦合支护结构及施工方法，其结构包括高恒阻机械式单体支架、架间拉杆（3）、锚杆（6）、锚索（7）和混凝土喷层（4、5）；施工工艺为：首先根据巷道设计要求开挖巷道，在巷道断面均匀喷射50-100mm厚混凝土喷层（4），采用锚杆索支护方法对巷道围岩加固；然后安装高恒阻机械式单体支架及架间拉杆；最后复喷30-50mm厚混凝土喷层（5），构成基于高恒阻机械式单体支架的耦合支护结构；该支护结构具有自承载能力强、整体性好、与围岩协调变形的自适应、效果优等特点，对应的施工方法简单、效率高，对于软岩巷道围岩控制具有显著效果和推广应用价值。

Description

一种基于高恒阻机械式单体支架耦合支护结构及施工方法 技术领域
本发明涉及软岩巷道支护技术领域，特别涉及一种用于地下采矿或岩石工程的大变形软岩巷道支护的基于高恒阻机械式单体支架耦合支护结构及施工方法。
背景技术
随着我国浅部煤炭资源日益枯竭，煤炭开采每年以10-12m速度逐步向深部延伸，深部巷道多表现为软岩巷道的特征，软岩巷道的支护问题成为困扰煤炭企业安全高效生产的一大难题。
目前，针对软岩巷道，主要采用的支护技术有锚喷支护技术、锚网喷支护技术、预应力锚索支护技术、型钢架棚支护技术、卸压支护技术、钢筋混凝土支护技术、料石砌碹支护技术等。在这些支护技术中，锚杆等主动支护只能作用在围岩破裂区和塑性区，难以起到悬吊承载的作用；型钢架棚等被动支护成本较高，投入-产出比不合理，稳定性差，施工速度慢。柔性支护结构支护强度小，不能有效控制巷道持续变形；刚性支护结构支护范围小，难以形成整体刚性支护。
软岩巷道支护技术研究结果表明，煤矿井下对软岩巷道控制和治理的过程中，急需一种对软岩巷道提供高强度的支护阻力，施工方便，支护范围大，能有效控制软岩巷道围岩变形与破坏，且整体性较好的支护结构。
发明内容
发明目的：针对上述现有技术，提出一种基于高恒阻机械式单体支架耦合支护结构及施工方法，同时提供软岩巷道主动支护和被动支护，能够使软岩巷道充分释放围岩变形能，并提供足够的支撑力控制巷道围岩变形。
技术方案：一种基于高恒阻机械式单体支架耦合支护结构，包括若干高恒阻机械式单体支架以及架间拉杆；所述高恒阻机械式单体支架包括上下对称布置的两根圆弧形柱筒，以及左右对称布置的两根圆弧形柱杆；所述柱筒端部内侧为倒置圆锥面，所述柱杆的两端分别套接轴承珠架并连同所述轴承珠架伸入所述柱筒端部，所述柱筒和柱杆形成首尾相连的环形框架结构；所述若干高恒阻机械式单体支架同轴平行设置，相邻两个单体支架通过沿圆周对称的四个架间拉杆连接固定。
进一步的，所述架间拉杆包括通过连杆以及位于所述连杆两端的柱筒夹紧套环，所 述柱筒夹紧套环通过螺栓螺母夹紧在所述柱筒外侧，并位于所述柱杆和柱筒连接处。
一种基于高恒阻机械式单体支架耦合支护结构的施工方法，包括如下步骤：
步骤1：在巷道断面喷射50-100mm厚混凝土喷层；
步骤2：向巷道围岩内部呈辐射状均匀打入锚杆和锚索；所述锚杆为高强预应力锚杆，直径为20-25mm，长度为2000-2800mm，间排距为800×800mm，预应力为60-80kN；所述锚索为高强预应力锚索，直径为18-22mm，长度为6000-9000mm，间排距为1000×1600mm，预应力大于160kN；
步骤3：安装高恒阻机械式单体支架，具体的安装步骤为：两侧柱杆的两端各套接一个轴承珠架，轴承珠架距离柱杆端头50-100mm，两柱筒放在巷道底板，将柱杆连同轴承珠架插入上部柱筒，然后将已连接的柱杆和柱筒沿巷道轴向旋转，并将下部柱筒与两侧柱杆连接。若干高恒阻机械式单体支架同轴平行设置，相邻两个单体支架的间距为0.8-1.6m，并通过沿圆周对称的四个架间拉杆连接固定；安装架间拉杆时，架间拉杆两侧柱筒夹紧套环处于张开状态，两叶套住相邻两柱筒，将夹紧螺栓插入螺栓孔内，并用夹紧螺母夹紧，将柱筒夹紧套环闭合并锁死；
步骤4：复喷30-50mm厚混凝土喷层，使混凝土喷层与高恒阻机械式单体支架充分接触。
进一步的，所述架间拉杆两端各有一个柱筒夹紧套环，所述柱筒夹紧套环为开合套环，每一开合套环两侧均设置有螺栓孔，通过夹紧螺栓和夹紧螺母与所述螺栓孔的连接与分离来控制所述柱筒夹紧套环的闭合与张开，所述架间拉杆固定在所述柱杆和柱筒的连接处。
进一步的，步骤1和步骤4的所述混凝土喷层的材料相同，配合比为水泥:水：砂1:2:2，速凝剂掺量为水泥用量的2.6％。
有益效果：本发明与现有技术相比，具有的优点和有益效果为：
(1)锚杆、锚索、喷射混凝土结构设计，形成前期柔性支护结构，属主动支护范畴，具有良好的卸压作用。
(2)高恒阻机械式单体支架环向设计，能将局部受压转移到整个支架结构上，使巷道压力均匀的分布于整个支护体系。在受压时，柱杆进入柱筒，依靠轴承珠架中的钢珠对杆体接触面进行压轧使之接触面发生变形来提供工作阻力，形成后期柔性和刚性支护结构，属被动支护范畴，先让后抗，抗让结合，使围岩变形能得到充分释放，有效缓 解支护构件承载压力。
(3)高恒阻机械式单体支架工作阻力大小取决于轴承珠架和钢管本身的材料性能，不受安装、环境等其他外界因素的影响，并能充分利用柱筒和柱杆自身的机械强度。
综上，本发明提供的一种基于高恒阻机械式单体支架耦合支护结构及施工方法，体现了“先主后被、主被结合，先柔后刚、刚柔并济”的支护理念，能够使软岩巷道充分释放围岩变形能，并提供足够的支撑力控制巷道围岩变形。
附图说明
图1为实施例中高恒阻机械式单体支架耦合支护结构示意图；
图2为实施例中高恒阻机械式单体支架结构体系示意图；
图3为实施例中架间拉杆结构示意图；
图4为实施例中轴承珠架连接结构示意图。
图中：1柱筒；2柱杆；3架间拉杆；4初期混凝土喷层；5后期混凝土喷层；6锚杆；7锚索；8轴承珠架；9柱筒夹紧套环；10夹紧螺栓；11夹紧螺母。
具体实施方式
下面结合附图对本发明做更进一步的解释。
根据下述实施例，可以更好的理解本发明。然而，本领域的技术人员容易理解，实施例所描述的具体的物料配比、工艺条件及其结果仅用于说明本发明，而不应当也不会限制权利要求书中所详细描述的本发明。
一种基于高恒阻机械式单体支架耦合支护结构，包括高恒阻机械式单体支架结构体系，高恒阻机械式单体支架结构体系由若干高恒阻机械式单体支架以及架间拉杆组成，如图2所示。高恒阻机械式单体支架由上下对称布置的两根圆弧形柱筒1，以及左右对称布置的两根圆弧形柱杆2组成。柱筒直径大于柱杆直径，柱筒1的端部内侧为倒置圆锥面，柱杆2的两端分别套接轴承珠架8并连同轴承珠架8伸入柱筒1端部，如图4所示。柱筒1和柱杆2形成首尾相连的环形框架结构，若干高恒阻机械式单体支架同轴平行设置，相邻两个单体支架通过沿圆周对称的四个架间拉杆3连接固定。
如图3所示，架间拉杆3两端各有一个柱筒夹紧套环9，柱筒夹紧套环9为开合套环，每一开合套环两侧均设置有螺栓孔，通过夹紧螺栓10和夹紧螺母11与螺栓孔的连接与分离来控制柱筒夹紧套环9的闭合与张开。柱筒夹紧套环9通过夹紧螺栓10和夹紧螺母11夹紧在柱筒外侧，架间拉杆3固定在柱杆2和柱筒1的连接处。
一种基于高恒阻机械式单体支架耦合支护结构的施工方法，包括如下步骤：
步骤1：根据巷道设计要求开挖巷道，在巷道断面喷射50-100mm厚混凝土喷层4，封闭围岩暴露面，提供前期柔性支护。
步骤2：向巷道围岩内部呈辐射状均匀打入锚杆6和锚索7。锚杆6为高强预应力锚杆，直径为20-25mm，长度为2000-2800mm，间排距为800×800mm，预应力为60-80kN；所述锚索7为高强预应力锚索，直径为18-22mm，长度为6000-9000mm，间排距为1000×1600mm，预应力大于160kN。通过锚杆6和锚索7将围岩固定到深部坚硬岩体中，加固围岩，使围岩充分发挥自主承载能力。
步骤3：安装高恒阻机械式单体支架。具体的安装步骤为：两侧柱杆2的两端各套接一个轴承珠架8，轴承珠架8距离柱杆2端头50-100mm，两柱筒1放在巷道底板，将柱杆2连同轴承珠架8插入上部柱筒1，然后将已连接的柱杆2和柱筒1沿巷道轴向旋转一定角度，并将下部柱筒1与两侧柱杆2连接。
若干高恒阻机械式单体支架同轴平行设置，相邻两个单体支架的间距为0.8-1.6m，并通过沿圆周对称的四个架间拉杆3连接固定。安装架间拉杆3时，架间拉杆3两侧柱筒夹紧套环9处于张开状态，两叶套住相邻两柱筒1，将夹紧螺栓10插入螺栓孔内，并用夹紧螺母11夹紧，将柱筒夹紧套环9闭合并锁死。
步骤4：复喷30-50mm厚混凝土喷层5，使混凝土喷层5与高恒阻机械式单体支架充分接触，形成软岩巷道基于高恒阻机械式单体支架耦合支护结构，如图1所示。
上述过程中，步骤1和步骤4的所述混凝土喷层的材料相同，配合比为水泥:水：砂1:2:2，速凝剂掺量为水泥用量的2.6％。

Claims (5)

  1. 一种基于高恒阻机械式单体支架耦合支护结构，其特征在于：包括若干高恒阻机械式单体支架以及架间拉杆；所述高恒阻机械式单体支架包括上下对称布置的两根圆弧形柱筒(1)，以及左右对称布置的两根圆弧形柱杆(2)；所述柱筒(1)端部内侧为倒置圆锥面，所述柱杆(2)的两端分别套接轴承珠架(8)并连同所述轴承珠架(8)伸入所述柱筒(1)端部，所述柱筒(1)和柱杆(2)形成首尾相连的环形框架结构；所述若干高恒阻机械式单体支架同轴平行设置，相邻两个单体支架通过沿圆周对称的四个架间拉杆(3)连接固定。
  2. 根据权利要求1所述的基于高恒阻机械式单体支架耦合支护结构，其特征在于：所述架间拉杆(3)包括通过连杆以及位于所述连杆两端的柱筒夹紧套环(9)，所述柱筒夹紧套环(9)通过夹紧螺栓(10)和夹紧螺母(11)夹紧在所述柱筒(1)外侧，并位于所述柱杆(2)和柱筒(1)连接处。
  3. 一种基于高恒阻机械式单体支架耦合支护结构的施工方法，其特征在于，包括如下步骤：
    步骤1：在巷道断面喷射50-100mm厚混凝土喷层(4)；
    步骤2：向巷道围岩内部呈辐射状均匀打入锚杆(6)和锚索(7)；所述锚杆(6)为高强预应力锚杆，直径为20-25mm，长度为2000-2800mm，间排距为800×800mm，预应力为60-80kN；所述锚索(7)为高强预应力锚索，直径为18-22mm，长度为6000-9000mm，间排距为1000×1600mm，预应力大于160kN；
    步骤3：安装高恒阻机械式单体支架，具体的安装步骤为：两侧柱杆(2)的两端各套接一个轴承珠架(8)，轴承珠架(8)距离柱杆(2)端头50-100mm，两柱筒(1)放在巷道底板，将柱杆(2)连同轴承珠架插入上部柱筒(1)，然后将已连接的柱杆(2)和柱筒(1)沿巷道轴向旋转后，并将下部柱筒(1)与两侧柱杆(2)连接；若干高恒阻机械式单体支架同轴平行设置，相邻两个单体支架的间距为0.8-1.6m，并通过沿圆周对称的四个架间拉杆(3)连接固定；安装架间拉杆(3)时，架间拉杆(3)两侧柱筒夹紧套环(9)处于张开状态，两叶套住相邻两柱筒(1)，将夹紧螺栓(10)插入螺栓孔内，并用夹紧螺母(11)夹紧，将柱筒夹紧套环(9)闭合并锁死；
    步骤4：复喷30-50mm厚混凝土喷层(5)，使混凝土喷层(5)与高恒阻机械式单体支架充分接触。
  4. 根据权利要求3所述的基于高恒阻机械式单体支架耦合支护结构的施工方法， 其特征在于，所述架间拉杆(3)两端各有一个柱筒夹紧套环(9)，所述柱筒夹紧套环(9)为开合套环，每一开合套环两侧均设置有螺栓孔，通过夹紧螺栓(10)和夹紧螺母(11)与所述螺栓孔的连接与分离来控制所述柱筒夹紧套环(9)的闭合与张开，所述架间拉杆(3)固定在所述柱杆和柱筒的连接处。
  5. 根据权利要求3所述的基于高恒阻机械式单体支架耦合支护结构的施工方法，其特征在于，步骤1和步骤4的所述混凝土喷层的材料相同，配合比为水泥:水：砂1:2:2，速凝剂掺量为水泥用量的2.6％。
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