CN110966025A - Shield tunnel segment crack plugging device and construction method - Google Patents
Shield tunnel segment crack plugging device and construction method Download PDFInfo
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- CN110966025A CN110966025A CN201911286492.4A CN201911286492A CN110966025A CN 110966025 A CN110966025 A CN 110966025A CN 201911286492 A CN201911286492 A CN 201911286492A CN 110966025 A CN110966025 A CN 110966025A
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- 238000010276 construction Methods 0.000 title claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 124
- 229910052742 iron Inorganic materials 0.000 claims abstract description 62
- 239000002002 slurry Substances 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000011440 grout Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000007569 slipcasting Methods 0.000 description 19
- 230000000149 penetrating effect Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
-
- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a shield tunnel segment crack plugging device, which comprises: the iron box comprises a top plate, a pair of first side plates, a pair of second side plates and a bottom plate, wherein the pair of first side plates are respectively and oppositely fixed at two sides of the top plate, the pair of second side plates are V-shaped and are respectively and oppositely fixed at the other two sides of the top plate, the bottom plate is inverted V-shaped and is fixed at the bottom edges of the pair of first side plates, a plurality of reserved grout permeating holes are symmetrically formed in the pair of first side plates, grouting holes are formed in the top plate, and the iron box is made of flexible steel sheets; a reserved grouting pipe which is vertically communicated with the grouting hole in a sealing manner; the rubber sleeves are arranged on the periphery of the iron box in a sleeved mode respectively so as to cover the reserved slurry permeating holes in a sealing mode. The invention also discloses a shield tunnel segment crack plugging construction method. The invention not only can meet the aim of plugging the segment cracks, but also can form wedge-shaped bodies in the segment cracks, thereby effectively reducing the falling risk of the plugging material.
Description
Technical Field
The invention relates to the technical field of subway tunnel construction quality equipment. More particularly, the invention relates to a shield tunnel segment crack plugging device and a construction method, which are suitable for plugging and repairing the penetrating and non-penetrating cracks of shield tunnel segments.
Background
With the rapid development of economic technology in China, subway tunnel projects are widely played in large cities in China, and although subway tunnel construction technology in China has made great progress and development, effective and uniform treatment methods for blocking the segment cracks of the shield tunnel are not available due to irregularity and irregularity of the segment cracks. And the section of jurisdiction is as the permanent supporting construction of shield tunnel, in case there is the existence of damage and crack, will produce huge threat for shield tunnel safety and subway later stage operation.
Although the conventional process of grouting in a hole to stop the leakage or smearing the plugging material and the like can achieve the aim of blocking the cracks of the duct piece in a short time, the plugging material is easy to age along with the influence of time lapse, underground water corrosion and the like, and the phenomena of falling off of the plugging material and the like are also easy to generate under the vibration action of a train.
Disclosure of Invention
The invention aims to provide a shield tunnel segment crack plugging device and a construction method, which can meet the aim of segment crack plugging, can form a wedge-shaped body in a segment crack, further can effectively reduce the falling risk of plugging materials, and solves the problems of plugging and repairing the penetrating and non-penetrating cracks of a shield tunnel segment.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a shield tunnel segment crack sealing device including:
the iron box comprises a top plate, a pair of first side plates, a pair of second side plates and a bottom plate, wherein the top plate and the pair of first side plates are square, the pair of first side plates are respectively and oppositely fixed on two sides of the top plate, the pair of second side plates are V-shaped and are respectively and oppositely fixed on the other two sides of the top plate, the bottom plate is formed by welding two square plates in an inverted V shape and is fixed on the bottom edges of the pair of first side plates, the pair of first side plates are both in a matrix shape and are symmetrically provided with a plurality of reserved grouting holes, the top plate is provided with grouting holes, and the iron box is made of flexible steel sheets;
a reserved grouting pipe which is vertically communicated with the grouting hole in a sealing manner;
the rubber sleeves are arranged on the periphery of the iron box in a sleeved mode respectively so as to cover the reserved slurry permeating holes in a sealing mode.
Preferably, the iron box is welded into a whole through a top plate, a side plate and a bottom plate, and the reserved grouting pipe is also welded with the iron box.
Preferably, the second side plate is formed by welding two right-angle triangular plates.
Preferably, the injection hole is located at the center of the top plate.
Preferably, the height of the first side plate is equal to the length of the beveled edge of the second side plate.
Preferably, the second side plate and the bottom plate are both of a symmetrical V-shaped structure.
Preferably, reserve the slip casting pipe and vertically insert in the slip casting hole and be close to the slip casting hole inner wall, reserve slip casting pipe upper portion and be provided with a plurality of through-holes along its circumference even interval, reserve the partial material that the slip casting pipe is close to through-hole department and set up to elastic material, reserve the slip casting pipe lower part and also be provided with a plurality of passageways along its circumference even interval, be provided with horizontally elastic component in it, the length under the elastic component free state is greater than the length of passageway still includes:
the inner diameter of the fixed pipe is the same as the diameter of the grouting hole, the axis of the fixed pipe is overlapped with the axis of the grouting hole, and the upper end of the fixed pipe is fixed on the lower surface of the top plate of the iron box;
the fixing seat is of a round convex structure with a hollow interior, is just sleeved outside the reserved grouting pipe and is positioned on the upper surface of the top plate of the iron box, a plurality of elastic blocks are fixed on a boss of the fixing seat, a plurality of mounting seats are fixed on the upper surface of the fixing seat, shaft rods are mounted on the mounting seats, and a plurality of inwards-concave grooves are formed in the inner wall of the fixing seat facing the reserved grouting pipe and correspond to a plurality of elastic pieces respectively;
the supporting rods are arranged on the shaft lever in a rotating sleeved mode respectively, one end of each supporting rod is hinged to the upper end of a limiting rod in a sliding mode, the lower end of each limiting rod is fixedly connected with the elastic block, and the other ends of the supporting rods penetrate through the through holes respectively and are located inside the reserved grouting pipes;
the grouting plate is arranged in a sliding mode and clings to the inner wall of the fixed pipe, and the grouting plate is arranged in a clinging mode and clings to the lower end of the reserved grouting pipe;
and the pull ropes are provided with a plurality of pull ropes, one ends of the pull ropes are respectively fixed at the other ends of the support rods, and the other ends of the pull ropes are respectively vertically tensioned downwards and fixed on the grouting plate.
Preferably, the elastic component includes spacing post, spring and the limiting plate that sets gradually to the inner wall from reserving the slip casting pipe outer wall, and spacing post and limiting plate are connected respectively at the spring both ends, spacing post with the recess cooperates just, the limiting plate upper surface has undercut's ring channel, still includes the fender ring, and it is that the outside level of sleeve top edge extends downward bending type again and forms, and when spacing post is whole to be located reserve in the slip casting pipe and during the limiting plate compression spring, the vertical part of hugging closely the limiting plate setting and buckling downwards of fender ring is located the ring channel just.
The invention also provides a shield tunnel segment crack plugging construction method, which comprises the following steps:
s1: determining the position of a segment crack and cleaning;
s2: inclining the pair of first side plates to the pair of second side plates to enable the side surfaces of the iron box to be conical and the bottom plate to be V-shaped and combined, and meanwhile, sheathing and covering the reserved slurry seepage holes in the iron box through rubber sleeves;
s3: inserting the iron box into the crack of the duct piece in a conical shape to the bottom of the crack;
s4: connecting a grouting nozzle of a pinhole grouting pump with a reserved grouting pipe, and injecting plugging slurry into the plugging device through the reserved grouting pipe until the rubber sleeve is expanded and the segment crack is filled with the plugging slurry;
s5: and (4) after the plugging slurry is solidified and meets the maintenance period, removing the reserved grouting pipe and smoothing the surface of the pipe piece.
Preferably, before step S3, the method further includes fixing a fixing tube in the iron box, and connecting the fixing seat, the stay bar, the grouting plate, the pull rope and the relevant components of the reserved grouting tube; step S4, after the step, the grouting is stopped and the reserved grouting pipe is plugged when the grout pushes the grouting plate to move upwards to the top plate of the iron box and the limiting column is clamped into the groove; and step S5, cutting off the pull rope and taking away the reserved grouting pipe and the relevant parts of the fixed seat after the plugging slurry is solidified and meets the maintenance period.
The invention at least comprises the following beneficial effects:
1. the plugging device and the plugging method not only can achieve the purposes of repairing and plugging the segment cracks, but also can effectively prevent the risk of dropping of the crack plugging body during the subway operation.
2. The plugging device and the plugging material can form a wedge-shaped body in the segment crack, so that the dropping risk of the plugging material can be effectively reduced, and the plugging and repairing problems of the penetrating and non-penetrating cracks of the shield tunnel segment are solved.
3. The reserved grouting pipe can be conveniently detached through reasonable arrangement, and no additional tool is needed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic front view of an occluding device of the present invention;
FIG. 2 is a schematic side view of an unexpanded occlusion device of the present invention;
FIG. 3 is a schematic side view of the expanded occluding device of the present invention;
FIG. 4 is a schematic view of the principle of the occluding device of the present invention;
FIG. 5 is a schematic view of the application of the plugging device of the present invention;
FIG. 6 is a schematic structural diagram of the grouting pipe reserved before grouting according to the present invention;
FIG. 7 is a schematic structural view of a portion of a grouting pipe reserved after grouting is completed according to the present invention;
FIG. 8 is a schematic view showing the positional relationship between the elastic member and the retainer ring according to the present invention.
Description of reference numerals:
1. reserve slip casting pipe, 2, iron box, 3, first curb plate, 4, second curb plate, 5, bottom plate, 6, rubber sleeve, 7, reserve the hole of oozing thick liquid, 8, section of jurisdiction, 9, section of jurisdiction crack, 10, fixed pipe, 11, slip casting board, 12, fixing base, 13, elastic block, 14, vaulting pole, 15, axostylus axostyle, 16, gag lever post, 17, recess, 18, stay cord, 19, elastic material, 20, spacing post, 21, spring, 22, limiting plate, 23, retaining ring.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 5, the present invention provides a shield tunnel segment crack sealing device, comprising: the iron box 2 comprises a top plate, a pair of first side plates 3, a pair of second side plates 4 and a bottom plate 5, wherein the top plate and the pair of first side plates 3 are square, the pair of first side plates 3 are respectively and oppositely fixed on two sides of the top plate, the pair of second side plates 4 are V-shaped and are respectively and oppositely fixed on the other two sides of the top plate, the bottom plate 5 is formed by welding two square plates in an inverted V shape and is fixed on the bottom edges of the pair of first side plates 3, the pair of first side plates 3 are both in a matrix shape and are symmetrically provided with a plurality of reserved slurry seepage holes 7, the center of the top plate is provided with a slurry injection hole, and the iron box 2 is; a reserved grouting pipe 1 which is vertically communicated with the grouting hole in a sealing manner; and a plurality of rubber sleeves 6 which are respectively sleeved on the periphery of the iron box 2 so as to hermetically cover the reserved grout permeating holes 7. The iron box 2 is welded into a whole through a top plate, a side plate and a bottom plate 5, and the reserved grouting pipe 1 is also welded with the iron box 2. The second side plate 4 is formed by welding two right-angle triangular plates. The height of the first side plate 3 is equal to the length of the bevel edge of the second side plate 4, and the second side plate 4 and the bottom plate 5 are both symmetrical V-shaped structures.
The invention also provides a shield tunnel segment crack plugging construction method, which comprises the following steps:
s1: determining the position of a segment crack 9 and cleaning;
s2: inclining the pair of first side plates 3 to the pair of second side plates 4 to enable the side surfaces of the iron box 2 to be conical and the bottom plate 5 to be V-shaped and combined, and meanwhile, sheathing and covering the reserved grout permeating holes 7 on the iron box 2 through the rubber sleeves 6;
s3: inserting the iron box 2 into the segment crack 9 in a conical shape to the bottom of the crack;
s4: connecting a grouting nozzle of a pinhole grouting pump with a reserved grouting pipe 1, and injecting plugging slurry into the plugging device through the reserved grouting pipe 1 until a rubber sleeve 6 is expanded and a segment crack is filled with the plugging slurry;
s5: and after the plugging slurry is solidified and meets the maintenance period, removing the reserved grouting pipe 1 and troweling the surface of the segment 8.
In the technical scheme, the reserved grouting pipe 1 is formed by processing a steel sheet, is of a cylindrical structure, is matched with a grouting nozzle of a pinhole grouting pump in size, and is welded and communicated with the iron box 2 at the lower part. The iron box 2 is composed of 6 iron sheets, the upper, front and rear surfaces of the iron box are composed of flat iron plates, two sides and the lower part of the iron box are formed by processing V-shaped iron sheets, the 6 iron sheets are welded and connected, and the lower V-shaped iron sheets are combined before the iron box 2 is inserted into the duct piece crack, so that the iron box 2 is inserted into the crack in a conical shape. A circular slurry permeating hole is formed in the upper portions of the front and rear iron sheets, the rubber sleeve 6 is wound in the hole forming area of the iron box 2 before the iron box 2 is inserted into a duct piece crack, and the reserved slurry permeating hole 7 is covered compactly. The rubber sleeve 6 is a rubber water stop belt, and the rubber sleeve is wound on the opening area of the iron box 2 and is used for sealing and reserving the grout penetration hole 7. The reserved slurry permeating holes 7 are arranged on the front and the back of the iron box 2 in a linear array.
The specific construction method comprises the following steps: after determining the position of a segment crack 9 and cleaning up, inserting the lower part of the plugging device into the segment crack, connecting a pinhole grouting pump grouting nozzle with a reserved grouting pipe 1 after the bottom of the crack, injecting plugging slurry into the plugging device through the reserved grouting pipe 1, gradually increasing the grouting amount along with the grouting pressure, gradually increasing the internal volume of an iron box 2, expanding a rubber sleeve 6 when the grouting pressure is increased to a certain value, and enabling the slurry to permeate into a gap between the iron box 2 and the crack until the crack is filled with the plugging slurry, wherein the iron box 2 is made of a flexible material and can be filled with the crack according to the size and shape of the crack. After the leaking stoppage slurry is solidified, the leaking stoppage material, the iron box 2 and the duct piece 8 are bonded into a whole and are in a reverse taper shape, so that the risk that a leaking stoppage plug body falls off under the vibration effect of subway operation in the later period can be effectively prevented. After the plugging slurry is solidified and meets the maintenance period, the reserved grouting pipe 1 is dismantled and the surface of the duct piece 8 is leveled, and finally the purposes of duct piece crack repair and plugging are achieved.
Example 2
As shown in fig. 6 to 8, on the basis of embodiment 1, in order to better achieve grouting plugging, and after construction is completed, the reserved grouting pipe 1 can be easily removed without using an additional tool for cutting, the present invention further provides a structure of the reserved grouting pipe 1, which is not welded and fixed to the iron box 2, but is vertically inserted into the grouting hole and close to the inner wall of the grouting hole, the upper portion of the reserved grouting pipe 1 is uniformly provided with a plurality of through holes along the circumferential direction thereof at intervals, a part of the reserved grouting pipe 1 close to the through holes is made of an elastic material 19, the lower portion of the reserved grouting pipe 1 is also uniformly provided with a plurality of channels along the circumferential direction thereof at intervals, a horizontal elastic member is arranged therein, and the length of the elastic member in a free state is greater than the length of the channels, and further comprising:
the inner diameter of the fixing pipe 10 is the same as the diameter of the grouting hole, the axis of the fixing pipe coincides with the axis of the grouting hole, and the upper end of the fixing pipe 10 is fixed on the lower surface of the top plate of the iron box 2;
the fixing seat 12 is of a hollow round convex structure, the fixing seat 12 is just sleeved outside the reserved grouting pipe 1 and is positioned on the upper surface of the top plate of the iron box 2, a plurality of elastic blocks 13 are fixed on a boss of the fixing seat 12, a plurality of mounting seats are fixed on the upper surface of the fixing seat 12, a shaft rod 15 is mounted on the mounting seats, and a plurality of inwards-concave grooves 17 are formed in the inner wall of the fixing seat 12 facing the reserved grouting pipe 1 and respectively correspond to a plurality of elastic pieces;
a plurality of support rods 14 are rotatably sleeved on the shaft rod 15 respectively, one end of each support rod 14 is hinged with the upper end of a limiting rod 16 in a sliding manner, the lower end of each limiting rod 16 is fixedly connected with the elastic block 13, and the other ends of the plurality of support rods 14 penetrate through the plurality of through holes respectively and are positioned inside the reserved grouting pipe 1;
the grouting plate 11 is arranged in a sliding mode and clings to the inner wall of the fixed pipe 10, and the grouting plate 11 is arranged in a clinging mode and clings to the lower end of the reserved grouting pipe 1;
and a plurality of pull ropes 18, wherein one ends of the pull ropes 18 are respectively fixed at the other ends of the support rods 14, and the other ends of the pull ropes 18 are respectively vertically tensioned downwards and fixed on the grouting plate 11.
Elastic component includes from reserving spacing post 20, spring 21 and the limiting plate 22 that slip casting pipe 1 outer wall set gradually to the inner wall, and spacing post 20 and limiting plate 22 are connected respectively at spring 21 both ends, spacing post 20 with recess 17 cooperates just, limiting plate 22 upper surface has the ring channel of undercut, still includes fender ring 23, and it is the outside level extension of sleeve top edge and buckles down again and form, and when spacing post 20 all is located reserve slip casting pipe 1 and limiting plate 22 compression spring 21, keep off the vertical part of hugging closely limiting plate 22 setting and buckling down of 23 ring and be located the ring channel just.
On the basis of the construction method of the embodiment 1, before the step S3, the method further includes fixing a fixed pipe 10 in the iron box 2, and connecting the fixed seat 12, the stay bar 14, the grouting plate 11, the pull rope 18 and relevant parts of the reserved grouting pipe 1; after the step S4, the method further includes stopping grouting and plugging the reserved grouting pipe 1 when the grouting plate 11 is pushed to move upwards to the top plate of the iron box 2 and the limiting column 20 is clamped into the groove 17; step S5 includes that after the plugging slurry is solidified and meets the maintenance period, the pull rope 18 is cut off and the related parts of the reserved grouting pipe 1 and the fixed seat 12 are taken away.
In the above technical scheme, the part of the reserved grouting pipe 1 above and below the through hole is made of the elastic material 19, so that the structure of the reserved grouting pipe 1 is not influenced by the stay bar 14 when the stay bar 14 rotates, and the height of the natural through hole is also larger than that of the stay bar 14, so that the through hole is ensured not to influence the smooth rotation of the stay bar 14. The elastic member in the channel is compressed in the channel in the initial state and a closure plate is provided through the outside of the channel, i.e. the inner wall of the pre-grouting pipe 1, so that the elastic member does not protrude from the outside of the channel. Elastic block 13 sets up to stretch out and draw back from top to bottom only, and the mount pad is used for installing axostylus axostyle 15, has the round through-hole on the vaulting pole 14 and just overlaps and locate axostylus axostyle 15 on and along axostylus axostyle 15 rotatory, and rotatory direction is along reserving slip casting pipe 1 radially from top to bottom, and the articulated elements is connected to gag lever post 16, and the articulated elements sets up to the length direction that can follow vaulting pole 14 and slides to make 16 slip hinges on.
In an initial state, as shown in fig. 6, the reserved grouting pipe 1 is positioned in the fixed pipe 10, the spring 21 is compressed through the limiting plate 22, the blocking ring 23 vertically and downwards abuts against the plurality of limiting plates 22, meanwhile, the bent part of the blocking ring 23 is clamped into the annular groove to realize positioning, the grouting plate 11 and the stay bar 14 are tensioned by the pull rope 18, the stay bar 14 is in a horizontal state at the moment, and the elastic block 13 is in a natural state; during grouting, the rubber sleeve 6 is expanded through the reserved grouting pipe 1 until the plugging slurry fills the segment crack 9, grouting is performed at the moment, the grouting plate 11 is pushed to move upwards under the strong pressure of grouting, the reserved grouting pipe 1 also moves upwards, the reserved grouting pipe 1 drives the plurality of support rods 14 to rotate around the shaft rod 15 in the moving process, the support rods 14 compress the elastic blocks 13 through the limiting rods 16, the downward thrust of the plurality of elastic blocks 13 is applied to the fixed seat 12 through the compression of the plurality of elastic blocks 13, the stability of the fixed seat 12 is ensured, the vertical stability of the reserved grouting pipe 1 is also ensured, when the reserved grouting pipe 1 moves upwards to the limiting columns 20 which are just clamped into the grooves 17 of the fixed seat 12 in a one-to-one correspondence manner, the reserved grouting pipe 1 does not move upwards, at the moment, the grouting plate 11 is just flush with the top plate of the iron box 2, grouting is stopped, and the grouting port is plugged, at the moment, under the effect of tensioning of the support rods 14 and the pull rope 18 all the time, combining the upward resilience power of elastic block 13, slip casting board 11 can not continue to shift up, reserve for the block connection between slip casting pipe 1 and the slip casting board 11, for example reserve slip casting pipe 1 lower extreme block in the sunken of slip casting board 11 upper surface or both paste and connect, reserve slip casting pipe 1 and remain vertical stable state all the time until accomplishing the maintenance stage. When the leaking stoppage slurry is solidified and meets the maintenance period, the reserved grouting pipe 1 can be removed only by shearing the pull rope 18, so that the method is very convenient and fast.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a shield tunnel section of jurisdiction crack plugging device which characterized in that includes:
the iron box comprises a top plate, a pair of first side plates, a pair of second side plates and a bottom plate, wherein the top plate and the pair of first side plates are square, the pair of first side plates are respectively and oppositely fixed on two sides of the top plate, the pair of second side plates are V-shaped and are respectively and oppositely fixed on the other two sides of the top plate, the bottom plate is formed by welding two square plates in an inverted V shape and is fixed on the bottom edges of the pair of first side plates, the pair of first side plates are both in a matrix shape and are symmetrically provided with a plurality of reserved grouting holes, the top plate is provided with grouting holes, and the iron box is made of flexible steel sheets;
a reserved grouting pipe which is vertically communicated with the grouting hole in a sealing manner;
the rubber sleeves are arranged on the periphery of the iron box in a sleeved mode respectively so as to cover the reserved slurry permeating holes in a sealing mode.
2. The shield tunnel segment crack sealing device of claim 1, wherein the iron box is welded into a whole by a top plate, a side plate and a bottom plate, and the reserved grouting pipe is also welded with the iron box.
3. The shield tunnel segment crack sealing device of claim 1, wherein the second side plate is formed by welding two right-angle triangular plates.
4. The shield tunnel segment crack sealing device of claim 1, wherein the grouting hole is located in the center of the top plate.
5. The shield tunnel segment slit blocking device of claim 1, wherein the height of the first side plate is equal to the length of the beveled edge of the second side plate.
6. The shield tunnel segment crack sealing device of claim 1, wherein the second side plate and the bottom plate are both symmetrical V-shaped structures.
7. The shield tunnel segment crack sealing device of claim 4, wherein the reserved grouting pipe is vertically inserted into the grouting hole and is close to the inner wall of the grouting hole, a plurality of through holes are uniformly arranged on the upper part of the reserved grouting pipe along the circumferential direction of the reserved grouting pipe at intervals, the part of the reserved grouting pipe close to the through holes is made of elastic material, a plurality of channels are also uniformly arranged on the lower part of the reserved grouting pipe along the circumferential direction of the reserved grouting pipe at intervals, a horizontal elastic part is arranged in the channels, and the length of the elastic part in a free state is greater than that of the channels, and the device further comprises:
the inner diameter of the fixed pipe is the same as the diameter of the grouting hole, the axis of the fixed pipe is overlapped with the axis of the grouting hole, and the upper end of the fixed pipe is fixed on the lower surface of the top plate of the iron box;
the fixing seat is of a round convex structure with a hollow interior, is just sleeved outside the reserved grouting pipe and is positioned on the upper surface of the top plate of the iron box, a plurality of elastic blocks are fixed on a boss of the fixing seat, a plurality of mounting seats are fixed on the upper surface of the fixing seat, shaft rods are mounted on the mounting seats, and a plurality of inwards-concave grooves are formed in the inner wall of the fixing seat facing the reserved grouting pipe and correspond to a plurality of elastic pieces respectively;
the supporting rods are arranged on the shaft lever in a rotating sleeved mode respectively, one end of each supporting rod is hinged to the upper end of a limiting rod in a sliding mode, the lower end of each limiting rod is fixedly connected with the elastic block, and the other ends of the supporting rods penetrate through the through holes respectively and are located inside the reserved grouting pipes;
the grouting plate is arranged in a sliding mode and clings to the inner wall of the fixed pipe, and the grouting plate is arranged in a clinging mode and clings to the lower end of the reserved grouting pipe;
and the pull ropes are provided with a plurality of pull ropes, one ends of the pull ropes are respectively fixed at the other ends of the support rods, and the other ends of the pull ropes are respectively vertically tensioned downwards and fixed on the grouting plate.
8. The shield tunnel segment crack sealing device of claim 7, wherein the elastic member comprises a limiting post, a spring and a limiting plate which are sequentially arranged from the outer wall of the reserved grouting pipe to the inner wall, the two ends of the spring are respectively connected with the limiting post and the limiting plate, the limiting post is just matched with the groove, the upper surface of the limiting plate is provided with a downward-concave annular groove, the shield tunnel segment crack sealing device further comprises a baffle ring which is formed by horizontally extending the upper edge of the sleeve outwards and bending the upper edge of the sleeve downwards, and when the limiting post is completely positioned in the reserved grouting pipe and the limiting plate compresses the spring, the baffle ring is vertically tightly attached to the limiting plate and the downward-bent part of the baffle ring is just positioned in the annular groove.
9. A shield tunnel segment crack plugging construction method is characterized by comprising the following steps:
s1: determining the position of a segment crack and cleaning;
s2: inclining the pair of first side plates to the pair of second side plates to enable the side surfaces of the iron box to be conical and the bottom plate to be V-shaped and combined, and meanwhile, sheathing and covering the reserved slurry seepage holes in the iron box through rubber sleeves;
s3: inserting the iron box into the crack of the duct piece in a conical shape to the bottom of the crack;
s4: connecting a grouting nozzle of a pinhole grouting pump with a reserved grouting pipe, and injecting plugging slurry into the plugging device through the reserved grouting pipe until the rubber sleeve is expanded and the segment crack is filled with the plugging slurry;
s5: and (4) after the plugging slurry is solidified and meets the maintenance period, removing the reserved grouting pipe and smoothing the surface of the pipe piece.
10. The shield tunnel segment crack sealing construction method of claim 9, wherein before the step S3, the method further comprises fixing a fixed pipe in the iron box, and connecting the fixed seat, the stay bar, the grouting plate, the pull rope and the related parts of the reserved grouting pipe; step S4, after the step, the grouting is stopped and the reserved grouting pipe is plugged when the grout pushes the grouting plate to move upwards to the top plate of the iron box and the limiting column is clamped into the groove; and step S5, cutting off the pull rope and taking away the reserved grouting pipe and the relevant parts of the fixed seat after the plugging slurry is solidified and meets the maintenance period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286492.4A CN110966025A (en) | 2019-12-13 | 2019-12-13 | Shield tunnel segment crack plugging device and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286492.4A CN110966025A (en) | 2019-12-13 | 2019-12-13 | Shield tunnel segment crack plugging device and construction method |
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| Publication Number | Publication Date |
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| CN110966025A true CN110966025A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911286492.4A Pending CN110966025A (en) | 2019-12-13 | 2019-12-13 | Shield tunnel segment crack plugging device and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196586A (en) * | 2020-09-08 | 2021-01-08 | 中建筑港集团有限公司 | Shield constructs section of jurisdiction slip casting retaining device |
-
2019
- 2019-12-13 CN CN201911286492.4A patent/CN110966025A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196586A (en) * | 2020-09-08 | 2021-01-08 | 中建筑港集团有限公司 | Shield constructs section of jurisdiction slip casting retaining device |
| CN112196586B (en) * | 2020-09-08 | 2022-08-12 | 中建筑港集团有限公司 | Shield constructs section of jurisdiction slip casting retaining device |
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