CN118008324A - Foundation reinforcing device for tunnel penetrating through soft soil stratum - Google Patents
Foundation reinforcing device for tunnel penetrating through soft soil stratum Download PDFInfo
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- CN118008324A CN118008324A CN202410274524.3A CN202410274524A CN118008324A CN 118008324 A CN118008324 A CN 118008324A CN 202410274524 A CN202410274524 A CN 202410274524A CN 118008324 A CN118008324 A CN 118008324A
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- 239000002689 soil Substances 0.000 title claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 title claims description 10
- 230000000149 penetrating effect Effects 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000003860 storage Methods 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 17
- 230000002787 reinforcement Effects 0.000 abstract description 11
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004848 polyfunctional curative Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- Geochemistry & Mineralogy (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
Description
技术领域Technical Field
本发明涉及软土地基加固技术领域,尤其涉及一种隧道穿越软土地层的地基加固装置。The invention relates to the technical field of soft soil foundation reinforcement, and in particular to a foundation reinforcement device for a tunnel passing through a soft soil layer.
背景技术Background technique
我国沿海地区淤泥质软弱土地层分布广泛,这种地层通常具有明显的“三高三低”特性,即:高含水量,高压缩性,高灵敏度,低强度,低密度,低渗透性。在这种地层中,由于地层本身无法给隧道提供足够的抗力,且后期周边开发活动频繁,隧道易产生变形大、沉降大的问题。因此,通常会对在深厚软土层中修建的隧道区段进行地基加固。Silt-like soft soil layers are widely distributed in my country's coastal areas. Such layers usually have obvious "three highs and three lows" characteristics, namely: high water content, high compressibility, high sensitivity, low strength, low density, and low permeability. In such layers, since the layers themselves cannot provide sufficient resistance for the tunnels, and the surrounding development activities are frequent in the later period, the tunnels are prone to large deformation and settlement problems. Therefore, the foundation of the tunnel section built in the deep soft soil layer is usually reinforced.
专利CN107524144A公开了一种用于隧道开挖前软土地基的加固系统及加固方法;在通过对隧道穿越区进行格栅式加固,在穿越区的软土内施加大量桩柱,盾构机穿越时,对盾构刀盘的磨损加剧,使得盾构机掘进困难。Patent CN107524144A discloses a reinforcement system and method for soft soil foundation before tunnel excavation; by performing grid-type reinforcement on the tunnel crossing area and applying a large number of piles in the soft soil of the crossing area, when the shield machine passes through, the wear on the shield cutterhead is aggravated, making it difficult for the shield machine to excavate.
发明内容Summary of the invention
本发明的目的是为了解决现有技术中存在的缺点,而提出的一种隧道穿越软土地层的地基加固装置。The purpose of the present invention is to solve the shortcomings of the prior art and to propose a foundation reinforcement device for a tunnel passing through a soft soil stratum.
为了实现上述目的,本发明采用了如下技术方案:In order to achieve the above object, the present invention adopts the following technical solutions:
一种隧道穿越软土地层的地基加固装置,包括多个桩管,每个桩管中部设有分离装置,多个桩管的分离装置高度对应隧道断面避让设置。A foundation reinforcement device for a tunnel passing through a soft soil layer comprises a plurality of pile pipes, each of which is provided with a separation device in the middle, and the heights of the separation devices of the plurality of pile pipes correspond to the avoidance settings of the tunnel section.
优选地,桩管包括上端管和下端管,上端管内腔下端和下端管内腔上端分别设置卡槽;Preferably, the pile pipe comprises an upper end pipe and a lower end pipe, and a clamping groove is provided at the lower end of the inner cavity of the upper end pipe and the upper end of the inner cavity of the lower end pipe respectively;
所述分离装置包括吊杆,吊杆上端设置螺纹段,吊杆外部设有套管,套管与吊杆上端螺纹连接,套管下端设有圆环,吊杆下端阵列式固定连接多个横杆,每个横杆滑动连接滑套,滑套一端固定连接弧形板,全部的弧形板能够拼接呈不同大小的筒状结构,滑套上侧铰接连接支杆,支杆上端与圆环铰接连接;The separation device comprises a suspension rod, a threaded section is arranged at the upper end of the suspension rod, a sleeve is arranged outside the suspension rod, the sleeve is threadedly connected to the upper end of the suspension rod, a circular ring is arranged at the lower end of the sleeve, a plurality of cross bars are fixedly connected to the lower end of the suspension rod in an array, each cross bar is slidably connected to a sliding sleeve, one end of the sliding sleeve is fixedly connected to an arc plate, all the arc plates can be spliced into a cylindrical structure of different sizes, the upper side of the sliding sleeve is hingedly connected to a support rod, and the upper end of the support rod is hingedly connected to the circular ring;
弧形板内弧面的上端和下端分别固定连接竖板,竖板固定连接卡块,卡块与卡槽对应设置。The upper end and the lower end of the inner arc surface of the arc-shaped plate are respectively fixedly connected to the vertical plate, and the vertical plate is fixedly connected to the clamping block, and the clamping block and the clamping slot are correspondingly arranged.
优选地,相邻两个弧形板的侧面交替设置槽口和凸块,凸块与槽口之间形成出浆孔。Preferably, notches and protrusions are alternately arranged on the side surfaces of two adjacent arc-shaped plates, and a slurry outlet hole is formed between the protrusion and the notch.
优选地,其中一个所述弧形板的外弧面设置存放槽,存放槽内转动连接弧形的弹性钢条,上端管的下端设置滑出槽,弧形板上端呈台阶状且弹性限位于滑出槽内,相邻上端管的下端设置卡接槽。Preferably, a storage groove is provided on the outer arc surface of one of the arc-shaped plates, and an arc-shaped elastic steel bar is rotatably connected in the storage groove. A slide-out groove is provided at the lower end of the upper end tube. The upper end of the arc-shaped plate is step-shaped and elastically limited in the slide-out groove, and a clamping groove is provided at the lower end of the adjacent upper end tube.
优选地,所述弧形板底部固定连接圆柱,圆柱端头固定连接钢球,钢球外侧设置橡胶层,钢球与存放槽的槽底球形铰接。Preferably, the bottom of the arc-shaped plate is fixedly connected to a cylinder, the end of the cylinder is fixedly connected to a steel ball, a rubber layer is arranged on the outside of the steel ball, and the steel ball is spherically hinged to the bottom of the storage tank.
优选地,下端管底部设置刃部,下端管设有注浆孔。Preferably, a blade is provided at the bottom of the lower end pipe, and a grouting hole is provided at the lower end pipe.
优选地,所述桩管上侧螺纹连接端盖,端盖固定连接注浆管和排浆管。Preferably, the upper side of the pile pipe is threadedly connected to an end cap, and the end cap is fixedly connected to a grouting pipe and a grouting discharge pipe.
优选地,所述桩管上端固定连接支架,支架上侧固定连接安装柄。Preferably, the upper end of the pile pipe is fixedly connected to a bracket, and the upper side of the bracket is fixedly connected to a mounting handle.
本发明的优点在于:本发明所提供的一种隧道穿越软土地层的地基加固装置通过将桩管钻入隧道穿越区的软土内,一方面桩管起到挤压土体使得土体密实,另一方面通过常规注浆技术,使得软土位置的土体固结,硬化剂对土体的硬化需要时间,且硬化后和桩柱对盾构刀盘的磨损加剧;针对隧道断面,设置对应高度的分离装置,由桩管的中部脱离,使得盾构刀盘的前进切削时刀具磨损降低,从而起到加固地基且不会严重影响施工工期的效果。The advantages of the present invention are as follows: a foundation reinforcement device for a tunnel passing through a soft soil layer provided by the present invention drills a pile pipe into the soft soil in the tunnel crossing area. On the one hand, the pile pipe squeezes the soil to make it dense, and on the other hand, the soil at the soft soil position is consolidated through conventional grouting technology. It takes time for the hardener to harden the soil, and after hardening, the wear of the shield cutter head by the pile column is aggravated. A separation device of a corresponding height is set for the tunnel section, which is detached from the middle part of the pile pipe, so that the wear of the tool is reduced when the shield cutter head is cutting forward, thereby reinforcing the foundation without seriously affecting the construction period.
本发明通过套管相对吊杆上升,套管下端的圆环上升,通过支杆拉动滑套沿横杆向吊杆滑动,从而使得全部的弧形板向内移动,同时卡块与卡槽脱离,外轮廓缩小后的弧形板便能够由上端管往外拔出,从而使得盾构刀盘进行路线上的障碍物能够移除,使得刀盘的磨损减小。The present invention causes the casing to rise relative to the suspension rod, and the circular ring at the lower end of the casing rises, and the support rod pulls the sliding sleeve to slide along the cross rod toward the suspension rod, so that all the arc plates move inward, and at the same time the clamping block is disengaged from the clamping groove, and the arc plate with a reduced outer contour can be pulled outward from the upper end tube, so that obstacles on the route of the shield cutter head can be removed, and the wear of the cutter head is reduced.
本发明通过弧形板向内移动,弹性钢条弹性抵着滑出槽并逐渐变成弧形,当全部的弧形板收缩后能够向上提升离开上端管,弹性钢条通过存放槽往上推动作用,沿着滑出槽向斜上的卡接槽插入,使得相邻的上端管依次连接到一起形成网格,降低隧道上方土体沉降的风险。The present invention enables the arc-shaped plates to move inwards, and the elastic steel bars elastically press against the slide-out grooves and gradually become arc-shaped. When all the arc-shaped plates are contracted, they can be lifted upwards and leave the upper end tubes. The elastic steel bars are pushed upwards by the storage grooves, and inserted into the oblique clamping grooves along the slide-out grooves, so that adjacent upper end tubes are connected together in sequence to form a grid, thereby reducing the risk of soil settlement above the tunnel.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明的基本结构示意图;Fig. 1 is a schematic diagram of the basic structure of the present invention;
图2是本发明中分离装置的局部结构示意图;FIG2 is a schematic diagram of a partial structure of a separation device in the present invention;
图3是本发明中分离装置的弧形板整体外径缩小后状态示意图;FIG3 is a schematic diagram of a state in which the overall outer diameter of the arc-shaped plate of the separation device of the present invention is reduced;
图4是图3中的E处局部放大图;FIG4 is a partial enlarged view of point E in FIG3 ;
图5是本发明多个桩管相对于隧道断面位置分布的示意图。FIG5 is a schematic diagram of the position distribution of multiple pile pipes relative to the tunnel section of the present invention.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
如图1至图5所示,本发明提供的一种隧道穿越软土地层的地基加固装置,包括多个桩管1,每个桩管1中部设有分离装置2,多个桩管1的分离装置2高度对应隧道断面避让设置。As shown in Figures 1 to 5, a foundation reinforcement device for a tunnel passing through a soft soil layer provided by the present invention includes a plurality of pile pipes 1, each of which is provided with a separation device 2 in the middle, and the heights of the separation devices 2 of the plurality of pile pipes 1 correspond to the avoidance settings of the tunnel section.
桩管1包括上端管11和下端管12,上端管11内腔下端和下端管12内腔上端分别设置卡槽13,下端管12底部设置刃部14,下端管12设有注浆孔15,桩管1上侧螺纹连接端盖16,端盖16固定连接注浆管17和排浆管18,借鉴钻孔灌注桩的施工技术,在桩管1下钻的过程中,往桩管1周围的土体内喷入硬化剂,起到加固作用,桩管1上端通过螺栓固定连接支架19,便于后续拆卸,支架19上侧固定连接安装柄191;The pile pipe 1 comprises an upper end pipe 11 and a lower end pipe 12. A slot 13 is respectively arranged at the lower end of the inner cavity of the upper end pipe 11 and the upper end of the inner cavity of the lower end pipe 12. A blade 14 is arranged at the bottom of the lower end pipe 12. A grouting hole 15 is arranged at the lower end pipe 12. An end cap 16 is threadedly connected to the upper side of the pile pipe 1. The end cap 16 is fixedly connected to a grouting pipe 17 and a grouting pipe 18. Drawing on the construction technology of bored piles, a hardener is sprayed into the soil around the pile pipe 1 during the drilling process of the pile pipe 1 to play a reinforcing role. The upper end of the pile pipe 1 is fixedly connected to a bracket 19 by bolts to facilitate subsequent disassembly. The upper side of the bracket 19 is fixedly connected to a mounting handle 191.
本发明通过采用现有技术的钻孔方式,将桩管1钻入隧道穿越区的软土内,一方面桩管1起到挤压土体使得土体密实,另一方面通过常规注浆技术,使得软土位置的土体固结,硬化剂对土体的硬化需要时间,且硬化后和桩柱对盾构刀盘的磨损加剧;The present invention uses the drilling method of the prior art to drill the pile pipe 1 into the soft soil in the tunnel crossing area. On the one hand, the pile pipe 1 squeezes the soil to make it dense, and on the other hand, the soil at the soft soil position is consolidated by the conventional grouting technology. It takes time for the hardener to harden the soil, and after hardening, the wear of the shield cutter head by the pile column is aggravated.
本发明通过硬化剂初期硬化后(硬化后土体强度可以通过实验室模拟获得),如图5所示,针对隧道断面10,设置对应高度的分离装置2,由桩管1的中部脱离,使得盾构刀盘的前进切削时刀具磨损降低,从而起到加固地基且不会严重影响施工工期的效果。After the initial hardening by the hardener of the present invention (the strength of the soil after hardening can be obtained through laboratory simulation), as shown in Figure 5, a separation device 2 of a corresponding height is set for the tunnel section 10, which is detached from the middle of the pile pipe 1, so that the tool wear is reduced during the forward cutting of the shield cutter head, thereby strengthening the foundation without seriously affecting the construction period.
作为本发明的一种具体实施方式,分离装置2包括吊杆21,吊杆21上端设置螺纹段,吊杆21外部设有套管22,套管22与吊杆21上端螺纹连接,套管22下端设有圆环23,吊杆21下端阵列式固定连接多个横杆24,每个横杆24滑动连接滑套25,滑套25一端固定连接弧形板26,全部的弧形板26能够拼接呈不同大小的筒状结构,滑套25上侧铰接连接支杆27,支杆27上端与圆环23铰接连接;As a specific embodiment of the present invention, the separation device 2 includes a suspension rod 21, a threaded section is arranged at the upper end of the suspension rod 21, a sleeve 22 is arranged outside the suspension rod 21, the sleeve 22 is threadedly connected to the upper end of the suspension rod 21, a ring 23 is arranged at the lower end of the sleeve 22, a plurality of cross bars 24 are fixedly connected in an array at the lower end of the suspension rod 21, each cross bar 24 is slidably connected to a sliding sleeve 25, one end of the sliding sleeve 25 is fixedly connected to an arc plate 26, all the arc plates 26 can be spliced into a cylindrical structure of different sizes, the upper side of the sliding sleeve 25 is hingedly connected to a support rod 27, and the upper end of the support rod 27 is hingedly connected to the ring 23;
弧形板26内弧面的上端和下端分别固定连接竖板28,竖板28固定连接卡块29,卡块29与卡槽13对应设置。The upper end and the lower end of the inner arc surface of the arc-shaped plate 26 are fixedly connected to the vertical plate 28 respectively, and the vertical plate 28 is fixedly connected to the clamping block 29 . The clamping block 29 is arranged corresponding to the clamping slot 13 .
本实施例工作时,桩管1作为整体沉入土体内,在土体初期加固强度符合试验要求后,通过液压装置夹持固定吊杆21,液压扳手夹持转动套管22,使得套管22相对吊杆21转动,在螺纹结构的作用下,套管22相对吊杆21上升,套管22下端的圆环23上升,通过支杆27拉动滑套25沿横杆24向吊杆21滑动,从而使得全部的弧形板26向内移动,同时卡块29与卡槽13脱离,外轮廓缩小后的弧形板26便能够由上端管11往外拔出,从而使得盾构刀盘进行路线上的障碍物能够移除,使得刀盘的磨损减小。When the present embodiment is working, the pile pipe 1 is sunk into the soil as a whole. After the initial reinforcement strength of the soil meets the test requirements, the hydraulic device clamps the fixed suspension rod 21, and the hydraulic wrench clamps the rotating sleeve 22, so that the sleeve 22 rotates relative to the suspension rod 21. Under the action of the threaded structure, the sleeve 22 rises relative to the suspension rod 21, and the ring 23 at the lower end of the sleeve 22 rises. The sliding sleeve 25 is pulled by the support rod 27 to slide along the cross bar 24 toward the suspension rod 21, so that all the arc plates 26 move inwardly, and at the same time, the block 29 is disengaged from the slot 13, and the arc plate 26 with a reduced outer contour can be pulled out from the upper end pipe 11, so that obstacles on the route of the shield cutter head can be removed, so that the wear of the cutter head is reduced.
作为本发明的进一步实施方式,相邻两个弧形板26的侧面交替设置槽口261和凸块262,凸块262与槽口261之间形成出浆孔263;凸块262与槽口261的相互交叉,能够对桩管1轴向起到良好的支撑效果,使得桩管1整体性强,便于与常规桩柱采用相同的施工方式,钻入土体内,在桩管1进入预定深度后,全部的弧形板26向吊杆21移动,收缩最外侧的轮廓,使得最终全部能够由上端管11抽出,从而方便重复使用,将上端管11和下端管12单独留置与土体内实现永久性加固。As a further embodiment of the present invention, notches 261 and protrusions 262 are alternately arranged on the sides of two adjacent arc-shaped plates 26, and a slurry outlet hole 263 is formed between the protrusion 262 and the notch 261; the intersection of the protrusion 262 and the notch 261 can provide good support for the axial direction of the pile pipe 1, so that the pile pipe 1 has strong integrity, which is convenient for drilling into the soil in the same construction method as conventional piles. After the pile pipe 1 enters the predetermined depth, all the arc-shaped plates 26 move toward the hanger 21, shrinking the outermost contour, so that all of them can be finally pulled out from the upper end pipe 11, thereby facilitating reuse, and leaving the upper end pipe 11 and the lower end pipe 12 separately in the soil to achieve permanent reinforcement.
作为本发明的进一步实施方式,其中一个弧形板26的外弧面设置存放槽3,存放槽3内转动连接弧形的弹性钢条4,上端管11的下端设置滑出槽41,弧形板26上端呈台阶状且弹性限位于滑出槽41内,相邻上端管11的下端设置卡接槽42。As a further embodiment of the present invention, a storage groove 3 is set on the outer arc surface of one of the arc plates 26, and an arc-shaped elastic steel bar 4 is rotatably connected in the storage groove 3. A slide-out groove 41 is set at the lower end of the upper end tube 11. The upper end of the arc plate 26 is stepped and elastically limited in the slide-out groove 41, and a clamping groove 42 is set at the lower end of the adjacent upper end tube 11.
具体的,弧形板26底部固定连接圆柱43,圆柱43端头固定连接钢球,钢球外侧设置橡胶层44,钢球与存放槽3的槽底球形铰接,通过橡胶层44的弹性卡入存放槽3的球形槽内并能够通过拉拽最终脱离,在拉拽过程中,当弹性钢条4前端在软土内遇到碎石或硬块时,便于弹性钢条4前进方向的改变,在无法对正到相邻上端管11的卡接槽42内时,也能够通过在自身上端管11下端形成枝杈,防止上端管11的下沉并加固上端管11与土体的连接强度。Specifically, the bottom of the arc plate 26 is fixedly connected to the cylinder 43, the end of the cylinder 43 is fixedly connected to the steel ball, a rubber layer 44 is arranged on the outside of the steel ball, the steel ball is spherically hinged to the bottom of the storage groove 3, and is elastically clamped into the spherical groove of the storage groove 3 through the rubber layer 44 and can be finally detached by pulling. During the pulling process, when the front end of the elastic steel bar 4 encounters gravel or hard blocks in the soft soil, it is convenient to change the forward direction of the elastic steel bar 4. When it cannot be aligned with the clamping groove 42 of the adjacent upper end tube 11, it can also prevent the upper end tube 11 from sinking and strengthen the connection strength between the upper end tube 11 and the soil by forming branches at the lower end of its own upper end tube 11.
本实施例工作时,由于分离装置2移除后,单独的上端管11具有在土体内下沉的风险,分离装置2作为一个模块化单元,在桩管1组装式,弹性钢条4按压在存放槽3内,且弹性钢条4的上端位于滑出槽41内,然后塞入到上端管11内,下端管12放置在预定位置后,通过套管22相对吊杆21下降,使得全部的弧形板26向外移动,将上端管11和下端管12卡接在分离装置2的两端;When the present embodiment is working, since after the separation device 2 is removed, the upper end pipe 11 alone has the risk of sinking in the soil, the separation device 2 is assembled on the pile pipe 1 as a modular unit, the elastic steel bar 4 is pressed into the storage groove 3, and the upper end of the elastic steel bar 4 is located in the slide-out groove 41, and then inserted into the upper end pipe 11, and after the lower end pipe 12 is placed in the predetermined position, it is lowered relative to the suspension rod 21 through the sleeve 22, so that all the arc plates 26 move outward, and the upper end pipe 11 and the lower end pipe 12 are clamped at both ends of the separation device 2;
在需要分离时,弧形板26向内移动,弹性钢条4弹性抵着滑出槽41并逐渐变成弧形,当全部的弧形板26收缩后能够向上提升离开上端管11,弹性钢条4通过存放槽3往上推动作用,沿着滑出槽41向斜上的卡接槽42插入,使得相邻的上端管11依次连接到一起形成网格,降低隧道上方土体沉降的风险,且弹性钢条4使得相邻上端管11之间形成通道,方便二次注浆浆液沿弹性钢条4外围流动,使得固化后相邻两个上端管11呈整体。When separation is required, the arc plate 26 moves inward, the elastic steel bar 4 elastically presses against the slide-out groove 41 and gradually becomes an arc. When all the arc plates 26 are contracted, they can be lifted upward and leave the upper end tube 11. The elastic steel bar 4 is pushed upward by the storage groove 3 and inserted into the oblique clamping groove 42 along the slide-out groove 41, so that adjacent upper end tubes 11 are connected together in sequence to form a grid, reducing the risk of soil settlement above the tunnel, and the elastic steel bar 4 forms a channel between adjacent upper end tubes 11, which facilitates the secondary grouting slurry to flow along the periphery of the elastic steel bar 4, so that the two adjacent upper end tubes 11 are integrated after solidification.
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims (8)
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