CN111411972B - Elastic sealing device for tightness of shield receiving tunnel portal and construction method - Google Patents

Elastic sealing device for tightness of shield receiving tunnel portal and construction method Download PDF

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Publication number
CN111411972B
CN111411972B CN202010206307.2A CN202010206307A CN111411972B CN 111411972 B CN111411972 B CN 111411972B CN 202010206307 A CN202010206307 A CN 202010206307A CN 111411972 B CN111411972 B CN 111411972B
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elastic
ring
plate
rubber plate
curtain cloth
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CN111411972A (en
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田辉
袁俊
陈俐光
于艺林
张雪
陈�峰
赵勇
张洪亮
陈通亮
许�鹏
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China Construction First Group Corp Ltd
China Construction Municipal Engineering Corp Ltd
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China Construction First Group Corp Ltd
China Construction Municipal Engineering Corp Ltd
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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
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0635—Tail sealing means, e.g. used as end shuttering
    • 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
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
    • 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

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The invention belongs to an elastic sealing device for tightness of a shield receiving tunnel portal and a construction method thereof. The inner diameter edge part of the outer side surface of the curtain cloth rubber plate is provided with an elastic ring capable of tightly tightening the curtain cloth rubber plate on the shield machine shell, or the inner diameter edge part and the middle part of the outer side surface of the curtain cloth rubber plate are at least provided with two elastic rings capable of tightly tightening the curtain cloth rubber plate on the shield machine shell. The elastic ring is a spring steel ring or an elastic rubber ring. The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate. The invention can elastically seal the shield casing in an elastic manner, and has the advantages of simple structure, reasonable design, good sealing property, convenient installation, simple and practical method and good use effect.

Description

Elastic sealing device for tightness of shield receiving tunnel portal and construction method
Technical Field
The invention belongs to an elastic sealing device for a shield receiving tunnel portal and a construction method.
Background
In the starting process of the shield machine, in order to prevent muddy water from entering a working well of the shield machine from a large amount of annular building gaps formed between a portal ring and a shield machine shell, the pressure of a soil cavity of an excavation surface of the shield machine, the stability of a soil body of the excavation surface and the construction in the shield machine are influenced. A well-performing receiving portal sealing device must be provided at the portal ring before the shield machine is started.
As shown in fig. 1, the receiving portal sealing device is used for preventing the leakage of the back lining grouting mortar when the shield machine starts, and the traditional receiving portal sealing device is composed of a curtain cloth rubber plate 2, an arc pressing plate 3, a folding pressing plate 13, a stud bolt 6, a nut 5 and a gasket 4. The method comprises the steps of pre-embedding a steel ring plate 11 with an opening on the outer side face and the lower end face of a door ring 12, then arranging the inner ends of a plurality of double-headed bolts on the outer edge of the door ring at intervals, arranging bolt holes 21 corresponding to the double-headed bolts on the upper portion of a circular cord fabric rubber plate, sleeving the upper portion of the cord fabric rubber plate on the corresponding double-headed bolts through the bolt holes, sequentially arranging an arc pressing plate, the upper portion of a folding pressing plate, a gasket and nuts on the double-headed bolts on the outer side of the cord fabric rubber plate, and screwing the nuts to fix the arc pressing plate, the upper portion of the folding pressing plate and the upper portion of the cord fabric rubber plate on the outer side of the door ring.
The inner diameter edge of the cord fabric rubber plate extends towards the axial center of the hole door ring, namely the inner diameter of the cord fabric rubber plate is smaller than the inner diameter of the hole door ring, and the folding pressing plate extending to the inner diameter edge of the cord fabric rubber plate in the hole door ring presses against the inner diameter edge of the cord fabric rubber plate. The folding pressing plate is composed of a fixing plate at the upper part and a pressing plate hinged at the lower part. Obviously, the pressing plate on the folding pressing plate presses the outer side surface of the curtain cloth rubber plate by the weight of the pressing plate, so that the inner side surface of the curtain cloth rubber plate is attached to the outer wall of the shield machine for water prevention.
The bending direction of the pressing plate on the folding pressing plate is consistent with the shield propelling direction. Because the outer side of the hole door ring is in a vertical state, the pressing plate on the folding pressing plate positioned at the upper part of the outer side of the hole door ring can be used for pressing the outer side surface of the curtain cloth rubber plate under the action of gravity; however, the pressing plates on the folding pressing plates positioned at the two sides and the lower part of the hole door ring naturally turn outwards and out of the lower end of the hole door ring, and cannot press the outer side surface of the curtain cloth rubber plate.
When the shield machine 15 arrives, the sealing bending direction of the curtain cloth rubber plate is consistent with the shield advancing direction, and also because the surface of the shield machine shell is not absolutely flat, the curtain cloth rubber plate lapped on the shield machine shell cannot form seamless lapping with the shield machine shell, and the pressing plate on the folding pressing plate cannot jack the curtain cloth rubber plate at two sides and below, so that the curtain cloth rubber plate cannot be completely and tightly jointed and sealed with the shield machine shell, the water burst of the tunnel door cannot be completely sealed, once the leakage of substances such as water or sand occurs, particularly under the geological condition of soft soil with rich water, the major accidents such as water burst of the tunnel mouth, sand burst, collapse of the ground at the end and even collapse of peripheral buildings, burying of the shield, collapse of the tunnel and the like are easily caused.
Disclosure of Invention
The invention aims to design an elastic sealing device for tightness of a shield receiving tunnel door and a construction method, which can elastically seal a shield shell in a tightness manner and have the advantages of simple structure, reasonable design, good sealing property, convenience in installation, simplicity, practicability and good use effect.
Therefore, the elastic sealing device for tightness of the shield receiving tunnel portal comprises a cord fabric rubber plate, an arc pressing plate, stud bolts, nuts and gaskets, wherein:
the inner diameter edge part of the outer side surface of the curtain cloth rubber plate is provided with an elastic ring capable of tightly tightening the curtain cloth rubber plate on the shield machine shell, or the inner diameter edge part and the middle part of the outer side surface of the curtain cloth rubber plate are at least provided with two elastic rings capable of tightly tightening the curtain cloth rubber plate on the shield machine shell. The elastic ring is a spring steel ring or an elastic rubber ring. The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
A plurality of fixing rings for elastic rings to penetrate through are arranged at intervals in the circumferential direction of the inner diameter edge part of the outer side surface of the cord fabric rubber plate, and the elastic rings are arranged in the fixing rings in a penetrating manner; or a plurality of fixing rings for the elastic rings to penetrate are respectively arranged at the inner diameter edge part and the middle part of the outer side surface of the cord fabric rubber plate in an annular direction at intervals, and the elastic rings are respectively arranged in the fixing rings on the same annular line in an penetrating manner.
The fixing ring is a rubber lug with a hole which is convexly arranged on the outer side surface of the cord fabric rubber plate, or a fixing ring which is fixed on the outer side surface of the cord fabric rubber plate.
The inner side surface of the cord fabric rubber plate is annularly provided with a plurality of circles of convex rings at intervals, and a plurality of layers of wear-resistant tensile nylon cloth are axially compounded in the cord fabric rubber plate.
Or: the utility model provides a shield constructs and receives portal elasticity sealing device, comprises curtain cloth rubber slab, circular arc clamp plate, stud, nut and gasket, wherein:
the inner diameter edge part of the outer side surface of the curtain cloth rubber plate is provided with a second elastic ring capable of tightening the curtain cloth rubber plate on the shield machine shell, a plurality of second fixing rings for the second elastic ring to penetrate are arranged in the annular direction of the inner diameter edge part of the outer side surface of the curtain cloth rubber plate at intervals, and the second elastic ring is arranged in each second fixing ring in a penetrating mode. Wear to be equipped with the slip cardboard on the arc clamp plate outside of hole door ring on roof pressure curtain cloth rubber slab upper portion, it is equipped with two bar pore ways to correspond pre-buried adjacent two stud bolts on every slip cardboard, the pore is parallel with the symmetry axis of slip cardboard, it is equipped with the first solid fixed ring that a plurality of first elasticity rings of confession penetrated to be the interval distance at the lateral surface internal diameter limit of slip cardboard, first elasticity ring is worn to establish in each first solid fixed ring, each slip cardboard passes through two bar pore sliding fit and can follow stud radial movement on adjacent two stud bolts.
And a first elastic ring which can tighten the inner diameter edge of each sliding clamping plate on the shield machine shell is arranged on the inner diameter edge of the outer side surface of each sliding clamping plate. The elastic ring is a spring steel ring or an elastic rubber ring.
The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
Or: the utility model provides a shield constructs and receives portal elasticity sealing device, comprises curtain cloth rubber slab, circular arc clamp plate, stud, nut and gasket, wherein:
wear to be equipped with the slip cardboard on the arc clamp plate outside of hole door circle on roof pressure curtain cloth rubber slab upper portion, it is equipped with two bar pore to correspond pre-buried adjacent two stud on every slip cardboard, the pore is parallel with the symmetry axis of slip cardboard, the internal diameter middle part at the slip cardboard is fixed to elastic steel's one end, elastic steel's the other end radially extends to curtain cloth rubber slab lateral surface internal diameter limit portion, elastic steel outside both ends are equipped with solid fixed ring respectively, each slip cardboard passes through two bar pore sliding fit and can follow stud radial movement on adjacent two stud. Two elastic rings which can tighten the cord fabric rubber plate or the inner diameter side of the sliding clamping plate on the shield machine shell are respectively arranged on the fixing rings at the two ends of the elastic steel plate on the outer side surface of the cord fabric rubber plate in a penetrating way.
The elastic ring is a spring steel ring or an elastic rubber ring.
The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
Evenly arrange 30 slip cardboard on each stud in the circular arc clamp plate outside, the equipartition is for arranging a slip cardboard for every 12, the slip cardboard width is 500mm, thickness is 10 ~ 15mm, the total arc length of slip cardboard internal diameter and the outer footpath adaptation of shield machine, the length in bar pore is 300 mm.
The elastic steel plate is a thin steel plate with the thickness of 1-5 mm or a steel bar with the diameter of 12-20 mm.
A construction method for realizing tightness of an elastic sealing device of a shield receiving tunnel portal comprises the following steps:
(1) and (3) preparing two elastic rings, wherein the inner diameter of each elastic ring is equal to the outer diameter of the shield machine shell, or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield machine shell and the thickness of the cord fabric rubber plate. Preparing a cord fabric rubber plate with a fixing ring, or preparing a cord fabric rubber plate with a fixing ring and a sliding clamping plate, or preparing a cord fabric rubber plate, a sliding clamping plate with an elastic steel plate and a fixing ring.
(2) The method comprises the steps of pre-burying portal steel ring plates, determining the inner diameter of each portal steel ring plate according to the outer diameter of a shield body of a shield machine, enabling the inner diameter of each portal steel ring plate to exceed the outer diameter of the shield body by 400-500 mm, welding the annular steel plates on the outer side faces of the portal steel ring plates by adopting arc-shaped steel plates with the width of 200-300 mm in a combined mode, reserving stud bolt holes on the annular steel plates, machining drill bushings on site by bolt hole positions, and arranging one bolt hole at every 6 degrees.
(3) The distance between the embedded position of the stud bolts and the outer diameter edge of the annular steel plate is 50-100 mm, and the arrangement interval is set to be one every 6 degrees.
(4) Installation shield constructs receives portal elasticity sealing device divide into:
(a) if: the curtain cloth rubber plate with the fixing ring is tightened on a tunnel portal elastic sealing device on the shield machine shell by one or two elastic rings; then: the method comprises the following steps that an annular curtain cloth rubber plate is hung on a portal steel ring plate through pre-buried stud bolts, the curtain cloth rubber plate is radially arranged along a circular ring, the width is generally 720mm, the thickness is 20-40 mm, good toughness and elasticity are achieved, 60 bolt holes are uniformly arranged in the upper portion of the curtain cloth rubber plate, the bolt holes are arranged at 6 degrees, and the curtain cloth rubber plate and the pre-buried stud bolts are correspondingly connected and fixed; the arc pressing plates are installed in blocks, the upper parts of the cord fabric rubber plates are fixedly pressed on the embedded stud bolts of the annular steel plates through the gaskets and the nuts, and the cord fabric rubber plates are fixedly pressed on the annular steel plates; a first elastic ring and a second elastic ring are sequentially arranged on the fixing ring of the cord fabric rubber plate in the circumferential direction; each elastic ring must pass through its own fixed ring.
(b) If: the curtain cloth rubber plate and the sliding clamping plate with the fixing rings are used, and the curtain cloth rubber plate is tightened on a tunnel portal elastic sealing device on a shield machine shell by two elastic tightening rings; then: the method comprises the following steps that an annular curtain cloth rubber plate is hung on a portal steel ring plate through pre-buried stud bolts, the curtain cloth rubber plate is radially arranged along a circular ring, the width is generally 720mm, the thickness is 20-30 mm, good toughness and elasticity are achieved, 60 bolt holes are uniformly arranged in the upper portion of the curtain cloth rubber plate, the bolt holes are arranged at 6 degrees, and the curtain cloth rubber plate and the pre-buried stud bolts are correspondingly connected and fixed; installing arc pressing plates on the embedded stud bolts in blocks and fixedly pressing the cord fabric rubber plates; the sliding clamping plates are installed in a partitioning mode, the pore channels in the sliding clamping plates need to be installed after aligning with the embedded stud bolts, gaskets and nuts of the stud bolts are sequentially installed after the installation is finished, the nuts are fastened to ensure that the sliding clamping plates can freely slide on the stud bolts in the radial direction, and the sliding clamping plates can move inwards and outwards as required along with the tunneling of the shield tunneling machine; and a second elastic ring is sequentially arranged on the second fixing ring of the curtain cloth rubber plate in the circumferential direction, and a first elastic ring is sequentially arranged on the first fixing ring of each sliding clamping plate, and each elastic ring needs to penetrate through the corresponding fixing ring.
(c) If: the curtain cloth rubber plate and the sliding clamping plate with the elastic steel plate are used, and the curtain cloth rubber plate is tightened on the tunnel portal elastic sealing device on the shield shell by two elastic rings; then: the method comprises the following steps that an annular curtain cloth rubber plate is hung on a portal steel ring plate through pre-buried stud bolts, the curtain cloth rubber plate is radially arranged along a circular ring, the width is generally 720mm, the thickness is 20-30 mm, good toughness and elasticity are achieved, 60 bolt holes are uniformly arranged in the upper portion of the curtain cloth rubber plate, the bolt holes are arranged at 6 degrees, and the curtain cloth rubber plate and the pre-buried stud bolts are correspondingly connected and fixed; installing arc pressing plates on the embedded stud bolts in blocks and fixedly pressing the cord fabric rubber plates; the sliding clamping plates with the elastic steel plates are installed in a partitioning mode, the pore channels in the sliding clamping plates need to be installed after aligning with the embedded stud bolts, gaskets and nuts of the stud bolts are sequentially installed after installation is completed, the nuts are fastened, it is guaranteed that each sliding clamping plate can freely slide on the stud bolts in the radial direction, and each sliding clamping plate can move inwards and outwards as required along with tunneling of the shield tunneling machine; a second elastic ring is arranged on the second fixing ring of the elastic steel plate, and a first elastic ring is sequentially arranged on the first fixing ring with the elastic steel plate; each elastic ring must pass through its own fixed ring.
(5) Propelling the shield tunneling machine: when the shield body of shield structure machine arrived portal department, carried out the portal and broken out earlier, the portal breaks out the in-process and need protect the curtain cloth rubber slab not receive the damage, and the portal is broken out and is accomplished, and the dregs clean up back lets the blade disc when the shield structure machine gets into external portal ring:
(a) if: the curtain cloth rubber plate with the fixing ring is tightened on a tunnel portal elastic sealing device on the shield machine shell by one or two elastic rings; then: the middle part of the curtain cloth rubber plate is tightly pressed on the shield machine shell by adjusting the first tensioning elastic ring, and the tail end of the curtain cloth rubber plate is tightly attached to the shield machine shell by adjusting the second tensioning elastic ring to form two complete elastic tightening seals.
(b) If: the curtain cloth rubber plate and the sliding clamping plate with the fixing rings are used, and the curtain cloth rubber plate is tightened on a tunnel portal elastic sealing device on a shield machine shell by two elastic tightening rings; then: the first elastic ring is tensioned by adjusting to enable the sliding clamping plate to press the curtain cloth rubber plate on the shield machine shell in the inward radial direction, and the second elastic ring is tensioned by adjusting to enable the tail end of the curtain cloth rubber plate to cling to the shield machine shell, so that two complete elastic tightening seals are formed.
(c) If: the curtain cloth rubber plate and the sliding clamping plate with the elastic steel plate are used, and the curtain cloth rubber plate is tightened on the tunnel portal elastic sealing device on the shield shell by two elastic rings; then: the first elastic ring is adjusted to enable the elastic steel plate on the sliding clamping plate to be pressed on the curtain cloth rubber plate inwards and downwards to be tightly pressed on the shield machine shell, and the second elastic ring is adjusted to enable the elastic steel plate to be pressed on the tail end of the curtain cloth rubber plate downwards to be tightly attached to the shield machine shell, so that two complete elastic tightening seals are formed.
(6) When the shield tail of the shield tunneling machine is pulled out of the tunnel portal and the curtain cloth rubber plate falls onto the pipe sheet, the elastic ring is completely tensioned by itself to ensure the sealing effect of the tunnel portal and prevent the tunnel portal from collapsing due to water and soil loss.
And (4) optionally using the elastic sealing device for installing the shield receiving tunnel portal in the step (4) singly.
The above structure and method achieve the objects of the present invention.
The invention can elastically seal the shield casing in an elastic manner, and has the advantages of simple structure, reasonable design, good sealing property, convenient installation, simple and practical method and good use effect.
Compared with the prior art, the invention has the following advantages and positive effects:
(1) the invention at least comprises two elastic rings, can effectively seal the opening door ring and the shield machine shell to form an annular building gap and has good sealing property. The two elastic rings can automatically and automatically stretch out and draw back like elastic bands according to the change elasticity of the body shape of the shield machine shell, so that the curtain cloth rubber plate is tightly tightened on the shield machine shell to complete sealing. Compared with the traditional folding pressing plate, the sealing device of the elastic ring is free from the limitation of gravity and position and has good sealing property.
(2) The invention uses the elastic ring to carry out uniform elastic symmetrical sealing performance on the building gap formed by the tunnel door ring and the shield machine shell. When the shield machine shell body changes, the elastic ring can change along with the change, the cord fabric rubber plate is tightened on the shield machine shell by the aid of uniform stress around the elastic ring, the cord fabric rubber plate is in close contact with the shield machine shell and the outer arc surface of the duct piece to form a plugging structure, soil particles and muddy water can be completely prevented from entering the tunnel portal sealing cavity, gaps between the rubber cord fabric plate and the shield machine shell or the duct piece can be effectively plugged, manufacturing cost is low, and economical efficiency is good.
(3) The invention has the advantages of simple structure, greatly reduced elements compared with the traditional structure, light weight, low cost, reliable working performance, flexible and labor-saving operation, suitability for construction and use, convenience for popularization and the like.
Drawings
Fig. 1 is a schematic view of a receiving tunnel portal sealing structure of a conventional shield tunneling machine during tunnel exit.
FIG. 2 is a schematic structural view of the cord fabric rubber sheet of the present invention.
Fig. 3 is a schematic view of a cross-sectional structure B-B in fig. 2.
FIG. 4 is a schematic view of the elastic sealing device of the present invention using a cord fabric rubber sheet.
FIG. 5 is a schematic view of a slide card structure according to the present invention.
Fig. 6 is a schematic view of the cross-sectional structure a-a in fig. 5.
FIG. 7 is a schematic view of a slide card with a resilient steel plate according to the present invention.
FIG. 8 is a schematic view of the construction of the resilient seal of the present invention using a sliding card.
Fig. 9 is a schematic view of the use state structure of fig. 8.
FIG. 10 is a front view of the elastomeric seal of the present invention.
Detailed Description
As shown in fig. 1 to 10, the elastic sealing device for tightness of the shield receiving tunnel portal comprises a curtain cloth rubber plate 2, a tunnel portal ring 12, a pre-embedded tunnel portal steel ring plate 11, an arc pressing plate 3, a stud bolt 6, a nut 5 and a gasket 4.
An elastic ring capable of tightly tightening the curtain cloth rubber plate on the shell of the shield machine 15 is arranged at the inner diameter edge part of the outer side surface of the curtain cloth rubber plate, or at least two elastic rings capable of tightly tightening the curtain cloth rubber plate on the shell of the shield machine are arranged at the inner diameter edge part and the middle part of the outer side surface of the curtain cloth rubber plate.
The elastic ring is a spring steel ring or an elastic rubber ring.
The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
Example 1: as shown in fig. 2 to 4, the elastic sealing device for tightness of the shield receiving tunnel portal comprises a cord fabric rubber plate, an arc pressing plate, a stud bolt, a nut and a gasket.
An elastic ring capable of tightly tightening the curtain cloth rubber plate on the shell of the shield machine 15 is arranged at the inner diameter edge part of the outer side surface of the curtain cloth rubber plate, or at least two elastic rings capable of tightly tightening the curtain cloth rubber plate on the shell of the shield machine are arranged at the inner diameter edge part and the middle part of the outer side surface of the curtain cloth rubber plate.
The elastic ring is a spring steel ring or an elastic rubber ring. The spring steel ring is a high-strength tension spring ring, the elastic rubber ring is formed by extrusion processing of TPR, SBS and TPE elastic materials, and the diameter of the elastic ring is not less than 3 cm.
The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
A plurality of second fixing rings 14 for the second elastic rings to penetrate are annularly arranged at intervals on the inner diameter edge part of the outer side surface of the curtain cloth rubber plate, and the second elastic rings 10 penetrate through the second fixing rings; therefore, a second elastic ring is arranged on the inner diameter edge part of the outer side surface of the curtain cloth rubber plate in the circumferential direction, and the curtain cloth rubber plate is tightly tightened on the shell of the shield machine 15.
Or except a second elastic ring arranged on the inner diameter edge part of the outer side surface of the curtain cloth rubber plate, a plurality of first fixing rings 8 for another first elastic ring 7 to penetrate are respectively arranged at intervals in the middle part of the outer side surface of the curtain cloth rubber plate in an annular manner; each elastic ring is respectively arranged in each fixed ring on the same circumferential line in a penetrating way. Thereby be equipped with twice respectively at the internal diameter limit portion and the middle part of curtain cloth rubber slab lateral surface and be first, the second elasticity of elasticity ring, tighten the limit portion and the middle part of curtain cloth rubber slab on the shield constructs the shell, thereby tighten whole curtain cloth rubber slab on the shield and construct the shell, accomplish and form into annular building space to the door ring of opening and shield and construct the shell and carry out elasticity and seal.
The fixing rings are rubber lugs with holes 22 which are convexly arranged on the outer side of the cord fabric rubber plate, or fixing rings fixed on the outer side of the cord fabric rubber plate, such as synthetic plastic short tubes or metal short tubes fixed on the outer side of the cord fabric rubber plate. The diameter of the hole 22 on each fixing ring should be larger than the outer diameter of each elastic ring, so that each elastic ring can move in each fixing ring conveniently to tighten each elastic ring.
The inner side of the curtain cloth rubber plate is annularly provided with a plurality of circles of convex rings 23 at intervals, and the inner side of the curtain cloth rubber plate is attached to the shield machine shell conveniently through the plurality of circles of convex rings. A plurality of layers of wear-resistant tensile nylon cloth 24 are axially compounded in the cord fabric rubber plate to form a structure that the wear-resistant tensile nylon cloth layers and the rubber layer 25 are compounded, so that the tensile strength and the compressive strength of the cord fabric rubber plate are improved.
The construction method of the elastic sealing device for the shield receiving tunnel portal comprises the following steps:
(1) and (3) preparing two elastic rings, wherein the inner diameter of each elastic ring is equal to the outer diameter of the shield machine shell, or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield machine shell and the thickness of the cord fabric rubber plate.
Preparing a cord fabric rubber plate with a fixing ring, or preparing a cord fabric rubber plate with a fixing ring and a sliding clamping plate, or preparing a cord fabric rubber plate, a sliding clamping plate with an elastic steel plate and a fixing ring.
(2) The method comprises the steps of pre-burying portal steel ring plates, determining the inner diameter of each portal steel ring plate according to the outer diameter of a shield body of a shield machine, enabling the inner diameter of each portal steel ring plate to exceed the outer diameter of the shield body by 400-500 mm, welding the annular steel plates on the outer side faces of the portal steel ring plates by adopting arc-shaped steel plates with the width of 200-300 mm in a combined mode, reserving stud bolt holes on the annular steel plates, machining drill bushings on site by bolt hole positions, and arranging one bolt hole at every 6 degrees.
(3) The distance between the embedded position of the stud bolts and the outer diameter edge of the annular steel plate is 50-100 mm, and the arrangement interval is set to be one every 6 degrees.
(4) And (3) installing a shield receiving tunnel portal elastic sealing device, and tightening the curtain cloth rubber plate on the tunnel portal elastic sealing device on the shield shell by using one or two elastic rings if the curtain cloth rubber plate with the fixing ring is used.
Then: hang annular curtain cloth rubber slab through pre-buried stud and establish on portal steel ring board, curtain cloth rubber slab radially arranges along the ring, and the width generally chooses for use 720mm, and thickness 20 ~ 40mm should have good toughness and elasticity, and 60 bolt holes 21 are evenly arranged on curtain cloth rubber slab upper portion, are 6 and arrange one, and it is fixed to be connected with pre-buried stud is corresponding. And arc pressing plates are installed in blocks, the upper parts of the cord fabric rubber plates are fixedly pressed on the embedded stud bolts of the annular steel plates through gaskets and nuts, and the cord fabric rubber plates are fixedly pressed on the annular steel plates. A first elastic ring and a second elastic ring are sequentially arranged on the fixing ring of the curtain cloth rubber plate in the circumferential direction. Each elastic ring must pass through its own fixed ring.
(5) Propelling the shield tunneling machine: when a shield body of the shield tunneling machine reaches a portal, the portal is broken first, the curtain cloth rubber plate needs to be protected from being damaged in the portal breaking process, the portal is broken completely, and after the slag soil is cleaned up, when the shield tunneling machine enters an external portal ring, the cutter head is passed.
The middle part of the curtain cloth rubber plate is tightly pressed on the shield machine shell by adjusting the first tensioning elastic ring, and the tail end of the curtain cloth rubber plate is tightly attached to the shield machine shell by adjusting the second tensioning elastic ring to form two complete elastic tightening seals.
The adjustment of tension refers to respectively tensioning two ends of each elastic ring, and then fixing the two ends, for example, fixing the two ends of the spring steel ring by welding, fixing the elastic rubber ring by a hoop, and the like, which are the same below, so that the description is not repeated.
(6) When the shield tail of the shield tunneling machine is pulled out of the tunnel portal and the curtain cloth rubber plate falls onto the duct piece, the elastic ring is completely tensioned on the duct piece by itself to ensure the sealing effect of the tunnel portal and prevent the tunnel portal from collapsing due to water and soil loss.
Example 2: as shown in fig. 5 and 6, embodiment 2 differs from embodiment 1 in that:
the inner diameter edge part of the outer side surface of the curtain cloth rubber plate is provided with a second elastic ring capable of tightening the curtain cloth rubber plate on the shield machine shell, a plurality of second fixing rings for the second elastic ring to penetrate are arranged in the annular direction of the inner diameter edge part of the outer side surface of the curtain cloth rubber plate at intervals, and the second elastic ring is arranged in each second fixing ring in a penetrating mode.
And a sliding clamping plate 1 is arranged on each stud bolt which is arranged on the outer side of the arc pressing plate on the outer side surface of the hole door ring and is used for jacking the upper part of the cord fabric rubber plate in a penetrating way. Two strip-shaped pore channels 101 are correspondingly pre-buried and adjacent two stud bolts on each sliding clamping plate. The pore is parallel with the symmetry axis of the sliding clamping plate, a plurality of first fixing rings 8 for the first elastic rings to penetrate are arranged on the inner diameter side of the outer side surface of the sliding clamping plate at intervals, and the first elastic rings 7 penetrate through the first fixing rings. Each sliding clamping plate is matched on two adjacent stud bolts in a sliding mode through two strip-shaped pore channels and can move along the radial direction of the stud bolts.
Evenly arrange 30 slip cardboard on each stud in the circular arc clamp plate outside, the equipartition is for arranging a slip cardboard for every 12, the slip cardboard width is 500mm, thickness is 10 ~ 15mm, the arc length is confirmed according to the shield structure machine external diameter. The total arc length of the inner diameter of the sliding clamping plate is matched with the outer diameter of the shield machine, the length of the strip-shaped hole is 300mm, the width of the hole on each sliding clamping plate is 28mm, and the embedded stud bolt can penetrate through the hole. Along with the tunneling of the shield tunneling machine, the sliding clamping plate can move inwards and outwards as required.
And a first elastic ring which can tighten the inner diameter edge of each sliding clamping plate on the shield machine shell is arranged on the inner diameter edge of the outer side surface of each sliding clamping plate.
The elastic ring is a spring steel ring or an elastic rubber ring. The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
The difference from example 1 is: the first elastic ring in embodiment 2 is fixed on the inside diameter edge of the outer side surface of the sliding clamping plate, because the sliding clamping plate can move radially along the stud bolts through two strip-shaped ducts on two adjacent stud bolts, the inside diameter edge of each sliding clamping plate can be tightened on the shield machine shell by the first elastic ring, each sliding clamping plate can play a role in sealing the middle part of the cord fabric rubber plate at the top pressing end on the shield machine shell, and also plays a role in forming an annular building gap between the vertical blocking sealing door ring and the shield machine shell. Especially, the sliding clamping plate has more obvious effect when the pressure outside the tunnel portal is large.
The construction method in example 2 is the same as the steps (1) to (3), (6) of the construction method in example 1, and therefore, the description thereof will not be repeated. The difference is that:
(4) installing a shield receiving portal elastic sealing device:
if: the curtain cloth rubber plate and the sliding clamping plate with the fixing rings are used, and the curtain cloth rubber plate is tightened on a tunnel portal elastic sealing device on a shield machine shell by two elastic tightening rings; then: hang annular curtain cloth rubber slab through pre-buried stud and establish on portal steel ring board, curtain cloth rubber slab radially arranges along the ring, and the width generally chooses for use 720mm, and thickness 20 ~ 30mm should have good toughness and elasticity, and 60 bolt holes are evenly arranged on curtain cloth rubber slab upper portion, are 6 and arrange one, and it is fixed with pre-buried stud corresponding connection. And installing arc pressing plates on the embedded stud bolts in blocks, and screwing the sheet nuts to fix and press the cord fabric rubber plate. The sliding clamping plates are installed in blocks. The pore on the sliding clamping plate needs to be installed after aligning with the embedded stud bolt, the gasket and the nut of the stud bolt are sequentially installed after the installation is completed, the nut is fastened, it is guaranteed that each sliding clamping plate can freely slide on the stud bolt in the radial direction, and each sliding clamping plate can move inwards and outwards as required along with the tunneling of the shield tunneling machine. And a second elastic ring is sequentially arranged on the second fixing ring of the curtain cloth rubber plate in the circumferential direction, and a first elastic ring is sequentially arranged on the first fixing ring of each sliding clamping plate, and each elastic ring needs to penetrate through the corresponding fixing ring.
(5) Propelling the shield tunneling machine: when a shield body of the shield tunneling machine reaches a portal, portal breaking is firstly carried out, a curtain cloth rubber plate needs to be protected from being damaged in the portal breaking process, the portal breaking is completed, and after residue soil is cleaned up, when the shield tunneling machine enters an external portal ring (a cutter head is passed):
the first elastic ring is tensioned by adjusting to enable the sliding clamping plate to press the curtain cloth rubber plate on the shield machine shell in the inward radial direction, and the second elastic ring is tensioned by adjusting to enable the tail end of the curtain cloth rubber plate to cling to the shield machine shell, so that two complete elastic tightening seals are formed.
Example 3: as shown in fig. 7 to 10, embodiment 3 is different from embodiment 2 in that:
the sliding clamping plate 1 is arranged on each stud bolt on the outer side of the arc pressing plate on the outer side face of the hole door ring at the upper part of the jacking cord fabric rubber plate in a penetrating mode, two strip-shaped holes 101 are formed in each sliding clamping plate correspondingly and pre-buried adjacent to each stud bolt, and the holes are parallel to the symmetry axis of the sliding clamping plate. One end of the elastic steel plate 9 is fixed in the middle of the inner diameter of the sliding clamping plate, and the other end of the elastic steel plate radially extends to the edge part of the inner diameter of the outer side surface of the cord fabric rubber plate. The elastic steel plate is a thin steel plate with the thickness of 1-5 mm or a steel bar with the diameter of 12-20 mm. The two ends of the outer side of the elastic steel plate are respectively provided with a fixing ring, namely a first fixing ring positioned in the middle of the inner diameter of the sliding clamping plate and a second fixing ring positioned at the outer end of the elastic steel plate. Each sliding clamping plate is matched on two adjacent stud bolts in a sliding mode through two strip-shaped pore channels and can move along the radial direction of the stud bolts.
Two first elastic rings and two second elastic rings which can tighten the curtain cloth rubber plate or the inner diameter edge of the curtain cloth rubber plate and the sliding clamping plate on the shield machine shell are respectively arranged on the first fixing ring and the second fixing ring at the two ends of the elastic steel plate on the outer side surface of the curtain cloth rubber plate in a penetrating way.
The elastic ring is a spring steel ring or an elastic rubber ring.
The inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
Evenly arrange 30 slip cardboard on each stud in the circular arc clamp plate outside, the equipartition is for arranging a slip cardboard for every 12, the slip cardboard width is 500mm, thickness is 10 ~ 15mm, the total arc length of slip cardboard internal diameter and the outer footpath adaptation of shield machine, the length in bar pore is 300 mm.
The construction method in example 3 is the same as the steps (1) to (3), (6) of the construction method in example 1, and therefore, the description thereof will not be repeated. The difference is that:
(4) installing a shield receiving portal elastic sealing device: because the sliding clamping plate with the elastic steel plate exists, the curtain cloth rubber plate can be selected from the traditional curtain cloth rubber plate.
Hang annular curtain cloth rubber slab through pre-buried stud and establish on portal steel ring board, curtain cloth rubber slab radially arranges along the ring, and the width generally chooses for use 720mm, and thickness 20 ~ 30mm should have good toughness and elasticity, and 60 bolt holes are evenly arranged on curtain cloth rubber slab upper portion, are 6 and arrange one, and it is fixed with pre-buried stud corresponding connection. Arc pressing plates are installed on the embedded stud bolts in a partitioning mode and are fixed through sheet nuts to press the cord fabric rubber plates. The sliding clamping plates with the elastic steel plates are installed in a blocking mode, the hole channels in the sliding clamping plates need to be installed after aligning with the embedded stud bolts, gaskets and nuts of the stud bolts are installed in sequence after installation is completed, nuts are fastened, it is guaranteed that the sliding clamping plates can freely slide on the stud bolts in the radial direction, and the sliding clamping plates can move inwards and outwards as required along with tunneling of the shield tunneling machine. And the second fixing ring of the elastic steel plate is provided with a second elastic ring, and the first fixing ring with the elastic steel plate is sequentially provided with a first elastic ring. Each elastic ring must pass through its own fixed ring.
(5) Propelling the shield tunneling machine: when the shield body of shield structure machine arrived portal department, carried out the portal and broken out earlier, the portal breaks out the in-process and need protect the curtain cloth rubber slab not receive the damage, and the portal is broken out and is accomplished, and the dregs clean up back lets the blade disc when the shield structure machine gets into external portal ring:
and adjusting the first elastic ring to make the elastic steel plate on the sliding clamp plate inwards and downwards tightly press the curtain cloth rubber plate on the shield machine shell. And adjusting the tensioned second elastic ring to enable the elastic steel plate to downwards press the tail end of the cord fabric rubber plate to be tightly attached to the shield machine shell to form two complete elastic tightening sealing devices.
Examples 1 to 3 are optionally used singly.
In a word, the invention can seal the shield casing elastically and flexibly, and has the advantages of simple structure, reasonable design, good sealing performance, convenient installation, simple and practical method and good use effect.

Claims (5)

1. A construction method of an elastic sealing device for a shield receiving tunnel portal is characterized by comprising the following steps:
(1) preparing two elastic rings, wherein the inner diameter of each elastic ring is equal to the outer diameter of the shield machine shell, or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield machine shell and the thickness of the cord fabric rubber plate;
preparing a cord fabric rubber plate with a fixing ring, or preparing a cord fabric rubber plate with a fixing ring and a sliding clamping plate, or preparing a cord fabric rubber plate, a sliding clamping plate with an elastic steel plate and a fixing ring;
(2) pre-burying portal steel ring plates, wherein the inner diameter of each portal steel ring plate is determined according to the outer diameter of a shield body of a shield machine, the inner diameter of each portal steel ring plate exceeds the outer diameter of the shield body by 400-500 mm, the annular steel plates on the outer side surfaces of the portal steel ring plates are formed by welding arc-shaped steel plates with the width of 200-300 mm in a combined mode, stud bolt holes are reserved in the annular steel plates, drill bushings can be machined on site, and the arrangement interval is set to be one every 6 degrees;
(3) the distance between the embedded position of the stud bolts and the outer diameter edge of the annular steel plate is 50-100 mm, and the arrangement distance is set to be one every 6 degrees;
(4) installation shield constructs receives portal elasticity sealing device divide into:
(a) if: the curtain cloth rubber plate with the fixing ring is tightened on a tunnel portal elastic sealing device on the shield machine shell by one or two elastic rings;
then: the method comprises the following steps that an annular curtain cloth rubber plate is hung on a portal steel ring plate through embedded stud bolts, the curtain cloth rubber plate is radially arranged along a ring, the width is 720mm, the thickness is 20-40 mm, good toughness and elasticity are achieved, 60 bolt holes are uniformly arranged in the upper portion of the curtain cloth rubber plate, the bolt holes are arranged at 6 degrees, and the curtain cloth rubber plate and the embedded stud bolts are correspondingly connected and fixed; the arc pressing plates are installed in blocks, the upper parts of the cord fabric rubber plates are fixedly pressed on the embedded stud bolts of the annular steel plates through the gaskets and the nuts, and the cord fabric rubber plates are fixedly pressed on the annular steel plates; a first elastic ring and a second elastic ring are sequentially arranged on the fixing ring of the cord fabric rubber plate in the circumferential direction; each elastic ring needs to pass through the corresponding fixing ring;
(b) if: the curtain cloth rubber plate and the sliding clamping plate with the fixing rings are used, and the curtain cloth rubber plate is tightened on a tunnel portal elastic sealing device on a shield machine shell by two elastic tightening rings;
then: the method comprises the following steps that an annular curtain cloth rubber plate is hung on a portal steel ring plate through embedded stud bolts, the curtain cloth rubber plate is radially arranged along a ring, the width is 720mm, the thickness is 20-30 mm, good toughness and elasticity are achieved, 60 bolt holes are uniformly arranged in the upper portion of the curtain cloth rubber plate, the bolt holes are arranged at 6 degrees, and the curtain cloth rubber plate and the embedded stud bolts are correspondingly connected and fixed; installing arc pressing plates on the embedded stud bolts in blocks and fixedly pressing the cord fabric rubber plates; the sliding clamping plates are installed in a partitioning mode, the pore channels in the sliding clamping plates need to be installed after aligning with the embedded stud bolts, gaskets and nuts of the stud bolts are sequentially installed after the installation is finished, the nuts are fastened, the sliding clamping plates are guaranteed to freely slide on the stud bolts in the radial direction, and the sliding clamping plates can move inwards and outwards as required along with the tunneling of the shield tunneling machine; sequentially mounting a second elastic ring on a second fixing ring of the curtain cloth rubber plate in a circumferential direction and sequentially mounting a first elastic ring on a first fixing ring of each sliding clamping plate, wherein each elastic ring needs to penetrate through the corresponding fixing ring;
(c) if: the curtain cloth rubber plate and the sliding clamping plate with the elastic steel plate are used, and the curtain cloth rubber plate is tightened on the tunnel portal elastic sealing device on the shield shell by two elastic rings;
then: the method comprises the following steps that an annular curtain cloth rubber plate is hung on a portal steel ring plate through embedded stud bolts, the curtain cloth rubber plate is radially arranged along a ring, the width is 720mm, the thickness is 20-30 mm, good toughness and elasticity are achieved, 60 bolt holes are uniformly arranged in the upper portion of the curtain cloth rubber plate, the bolt holes are arranged at 6 degrees, and the curtain cloth rubber plate and the embedded stud bolts are correspondingly connected and fixed; installing arc pressing plates on the embedded stud bolts in blocks and fixedly pressing the cord fabric rubber plates; the sliding clamping plates with the elastic steel plates are installed in a partitioning mode, the pore channels in the sliding clamping plates need to be installed after aligning with the embedded stud bolts, gaskets and nuts of the stud bolts are sequentially installed after installation is completed, the nuts are fastened, the sliding clamping plates are guaranteed to freely slide on the stud bolts in the radial direction, and the sliding clamping plates can move inwards and outwards as required along with tunneling of the shield tunneling machine; a second elastic ring is arranged on the second fixing ring of the elastic steel plate, and a first elastic ring is sequentially arranged on the first fixing ring with the elastic steel plate; each elastic ring needs to pass through the corresponding fixing ring;
(5) propelling the shield tunneling machine: when the shield body of shield structure machine arrived portal department, carried out the portal and broken out earlier, the portal breaks out the in-process and need protect the curtain cloth rubber slab not receive the damage, and the portal is broken out and is accomplished, and the dregs clean up back lets the blade disc when the shield structure machine gets into external portal ring:
(a) if: the curtain cloth rubber plate with the fixing ring is tightened on a tunnel portal elastic sealing device on the shield machine shell by one or two elastic rings;
then: adjusting the tensioned first elastic ring to enable the middle part of the curtain cloth rubber plate to be tightly pressed on the shield machine shell, and adjusting the tensioned second elastic ring to enable the tail end of the curtain cloth rubber plate to be tightly attached to the shield machine shell to form two complete elastic tightening seals;
(b) if: the curtain cloth rubber plate and the sliding clamping plate with the fixing rings are used, and the curtain cloth rubber plate is tightened on a tunnel portal elastic sealing device on a shield machine shell by two elastic tightening rings;
then: adjusting the first tensioning elastic ring to enable the sliding clamping plate to press the curtain cloth rubber plate on the shield machine shell inwards and radially, and adjusting the second tensioning elastic ring to enable the tail end of the curtain cloth rubber plate to be tightly attached to the shield machine shell to form two complete elastic tightening seals;
(c) if: the curtain cloth rubber plate and the sliding clamping plate with the elastic steel plate are used, and the curtain cloth rubber plate is tightened on the tunnel portal elastic sealing device on the shield shell by two elastic rings;
then: adjusting the first tensioning elastic ring to enable the elastic steel plate on the sliding clamping plate to be pressed on the curtain cloth rubber plate inwards and downwards on the shield machine shell, and adjusting the second tensioning elastic ring to enable the elastic steel plate to be pressed on the tail end of the curtain cloth rubber plate downwards to be tightly attached to the shield machine shell, so that two complete elastic tightening seals are formed;
(6) when the shield tail of the shield tunneling machine is pulled out of the tunnel portal and the curtain cloth rubber plate falls onto the pipe sheet, the elastic ring is completely tensioned by itself to ensure the sealing effect of the tunnel portal and prevent the tunnel portal from collapsing due to water and soil loss.
2. The method of claim 1, wherein: preparing two elastic rings in the step (1), wherein the inner diameter of each elastic ring is equal to the outer diameter of the shield shell, or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate:
the inner diameter edge part of the outer side surface of the curtain cloth rubber plate is provided with an elastic ring capable of tightly tightening the curtain cloth rubber plate on the shield machine shell, or the inner diameter edge part and the middle part of the outer side surface of the curtain cloth rubber plate are at least provided with two elastic rings capable of tightly tightening the curtain cloth rubber plate on the shield machine shell;
the elastic ring is a spring steel ring or an elastic rubber ring;
a plurality of fixing rings for elastic rings to penetrate through are arranged at intervals in the circumferential direction of the inner diameter edge part of the outer side surface of the cord fabric rubber plate, and the elastic rings are arranged in the fixing rings in a penetrating manner;
or a plurality of fixing rings for the elastic rings to penetrate are respectively arranged at the inner diameter edge part and the middle part of the outer side surface of the cord fabric rubber plate in an annular mode at intervals, and the elastic rings penetrate through the fixing rings on the same annular line;
the fixing ring is a perforated rubber lug which is convexly arranged on the outer side surface of the cord fabric rubber plate, or is fixed on the outer side surface of the cord fabric rubber plate;
the inner side surface of the cord fabric rubber plate is annularly provided with a plurality of circles of convex rings at intervals, and a plurality of layers of wear-resistant tensile nylon cloth are axially compounded in the cord fabric rubber plate.
3. The method of claim 1, wherein: the cord fabric rubber plate with the fixing ring or the cord fabric rubber plate and the sliding clamping plate with the fixing ring are prepared in the step (1) as follows:
a second elastic ring capable of tightly tightening the curtain cloth rubber plate on the shield machine shell is arranged at the inner diameter edge part of the outer side surface of the curtain cloth rubber plate, a plurality of second fixing rings for the second elastic ring to penetrate are arranged at intervals in the circumferential direction of the inner diameter edge part of the outer side surface of the curtain cloth rubber plate, and the second elastic ring is arranged in each second fixing ring in a penetrating manner;
sliding clamping plates are arranged on the stud bolts which are arranged on the outer side of the arc pressing plate on the outer side face of the hole door ring and press the upper portion of the curtain cloth rubber plate in a penetrating mode, two strip-shaped holes are formed in each sliding clamping plate and correspond to two embedded adjacent stud bolts, the holes are parallel to the symmetry axis of the sliding clamping plates, a plurality of first fixing rings for first elastic rings to penetrate through are arranged on the inner diameter side of the outer side face of each sliding clamping plate at intervals, the first elastic rings penetrate through the first fixing rings, and each sliding clamping plate is arranged on the two adjacent stud bolts in a sliding mode through the two strip-shaped holes and can move along the radial direction of the stud bolts;
a first elastic ring which can tighten the inner diameter edge of each sliding clamping plate on the shield machine shell is arranged at the inner diameter edge of the outer side surface of each sliding clamping plate;
the elastic ring is a spring steel ring or an elastic rubber ring;
the inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate.
4. The method of claim 1, wherein: the step (1) of preparing the cord fabric rubber plate, the sliding clamping plate with the elastic steel plate and the fixing ring comprises the following steps:
sliding clamping plates are arranged on the stud bolts which are arranged on the outer side of the arc pressing plate on the outer side of the hole door ring and press the upper part of the curtain cloth rubber plate in a penetrating way, two strip-shaped pore passages are arranged on each sliding clamping plate and correspond to the two embedded adjacent stud bolts, the pore passages are parallel to the symmetry axis of the sliding clamping plates, one end of an elastic steel plate is fixed in the middle of the inner diameter of the sliding clamping plate, the other end of the elastic steel plate radially extends to the edge part of the inner diameter of the outer side of the curtain cloth rubber plate, two end parts of the outer side of the elastic steel plate are respectively provided with a fixing ring, and each sliding clamping plate is matched on the two adjacent stud bolts in a sliding way through the two strip-shaped pore passages and can move along the radial direction of the stud bolts;
two elastic rings which can tighten the cord fabric rubber plate or the inner diameter side of the cord fabric rubber plate and the sliding clamping plate on the shield machine shell are respectively arranged on the fixing rings at the two ends of the elastic steel plate on the outer side surface of the cord fabric rubber plate in a penetrating way;
the elastic ring is a spring steel ring or an elastic rubber ring;
the inner diameter of each elastic ring is equal to the outer diameter of the shell of the shield; or the inner diameter of each elastic ring is equal to the sum of the outer diameter of the shield shell and the thickness of the cord fabric rubber plate;
each stud bolt on the outer side of the arc pressing plate is uniformly provided with 30 sliding clamping plates, each sliding clamping plate is uniformly arranged at every 12 degrees, the width of each sliding clamping plate is 500mm, the thickness of each sliding clamping plate is 10-15 mm, the total arc length of the inner diameter of each sliding clamping plate is matched with the outer diameter of the shield machine, and the length of each strip-shaped pore channel is 300 mm;
the elastic steel plate is a thin steel plate with the thickness of 1-5 mm or a steel bar with the diameter of 12-20 mm.
5. The method of claim 1, wherein: and (4) optionally using the elastic sealing device for installing the shield receiving tunnel portal in the step (4) singly.
CN202010206307.2A 2020-03-23 2020-03-23 Elastic sealing device for tightness of shield receiving tunnel portal and construction method Active CN111411972B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106837359A (en) * 2017-02-09 2017-06-13 中铁十局集团城市轨道工程有限公司 A kind of arrival portal sealing device and seal construction method
CN206495677U (en) * 2017-02-09 2017-09-15 中铁十一局集团城市轨道工程有限公司 A kind of arrival portal sealing device
CN107165643A (en) * 2017-06-16 2017-09-15 中建市政工程有限公司 Sealing device for originating tunnel portal of slurry shield
CN108952775A (en) * 2018-08-10 2018-12-07 中铁局集团有限公司 One kind being used for shield launching and received portal water sealing structure construction method
CN208416546U (en) * 2018-06-26 2019-01-22 北京市政建设集团有限责任公司 A kind of shield reception construction seal rubber cord

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106837359A (en) * 2017-02-09 2017-06-13 中铁十局集团城市轨道工程有限公司 A kind of arrival portal sealing device and seal construction method
CN206495677U (en) * 2017-02-09 2017-09-15 中铁十一局集团城市轨道工程有限公司 A kind of arrival portal sealing device
CN107165643A (en) * 2017-06-16 2017-09-15 中建市政工程有限公司 Sealing device for originating tunnel portal of slurry shield
CN208416546U (en) * 2018-06-26 2019-01-22 北京市政建设集团有限责任公司 A kind of shield reception construction seal rubber cord
CN108952775A (en) * 2018-08-10 2018-12-07 中铁局集团有限公司 One kind being used for shield launching and received portal water sealing structure construction method

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