CN111648775A - Method and tool for renovating transverse deformation of shield tunnel - Google Patents
Method and tool for renovating transverse deformation of shield tunnel Download PDFInfo
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- CN111648775A CN111648775A CN202010434531.7A CN202010434531A CN111648775A CN 111648775 A CN111648775 A CN 111648775A CN 202010434531 A CN202010434531 A CN 202010434531A CN 111648775 A CN111648775 A CN 111648775A
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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
- E21D9/01—Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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Abstract
The application discloses method for renovating transverse deformation of shield tunnel, comprising: determining the position of the shield tunnel with the largest transverse deformation of the segment and the convergence setting position; tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation; adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a set position; grouting materials into gaps behind the back of the duct pieces on two sides; and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength. Meanwhile, the transverse deformation treatment tool for the shield tunnel is also provided. The method and the tool for remedying the transverse deformation of the shield tunnel have the advantages of being simple to operate and low in cost.
Description
Technical Field
The application relates to the technical field of tunnel engineering, in particular to a method and a tool for renovating transverse deformation of a shield tunnel.
Background
The shield method is widely applied by the advantages of safety, rapidness, little influence of climatic factors, low construction labor intensity, particular suitability for soft water-bearing stratum and the like. After the shield tunnel is built, transverse deformation can be generated under the influence of various factors. The factors causing deformation mainly include two major categories: one is caused by ballast above the tunnel, and the other is caused by disturbance of excavation unloading at two sides of the tunnel.
The shield tunnel is formed by splicing duct pieces through connecting bolts, and the outer diameter of the duct pieces is smaller than the diameter of shield excavation. After the duct pieces are assembled and separated from the shield shell, a large gap exists between the duct pieces and the stratum, and grouting filling needs to be carried out on the gap between the duct pieces and the stratum. If the filling is not compact, the pipe sheet can generate transverse deformation due to insufficient lateral resistance under the long-term action of soil pressure above the shield and dynamic load in the tunnel along with the lapse of time. The subway design specification provides specific provisions for the transverse deformation of the tunnel: after the shield tunnel is assembled into a ring, under the action of external load, the accumulated variation of the diameter is less than 5 per thousand D, but the deformation value is greater than the standard under many conditions. When the deformation is too large, the splicing seams of the segments can be opened, and water leakage can occur. Particularly, the segment is damaged or dropped when serious, which endangers the driving safety.
In the prior art, the method for treating the transverse deformation of the shield tunnel comprises the steps of installing a steel ring on the inner side of the shield tunnel, and filling a high-strength bonding material between a duct piece and the steel ring, so that the duct piece and the steel ring are integrated to achieve the purpose of reinforcing the duct piece.
Disclosure of Invention
In view of this, the embodiments of the present application are expected to provide a method and a tool for remedying the lateral deformation of the shield tunnel, so as to solve the problem that the cost for remedying the lateral deformation of the shield tunnel is too high.
In order to achieve the above object, in one aspect of the embodiments of the present application, there is provided a method for remedying lateral deformation of a shield tunnel, including:
determining the position of the shield tunnel with the largest transverse deformation of the segment;
tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation;
adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a set position;
grouting materials into gaps behind the back of the duct pieces on two sides;
and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength.
Further, the step of determining the position where the transverse deformation of the segment of the deformed shield tunnel is the largest comprises the following steps:
measuring the segments of the shield tunnel at the deformation section to obtain the transverse deformation value of each ring of segments;
and measuring the position of the maximum transverse deformation position of each ring of the pipe piece according to the measurement result.
Further, measuring the segments of the shield tunnel at the deformation section by adopting a three-dimensional laser scanner;
and further, measuring the position of the maximum transverse deformation position of each ring of the duct piece by using a total station.
Further, the step of providing the segments on both sides of the position of maximum lateral deformation with tensioning connectors comprises:
two groups of tensioning connecting pieces are arranged on the pipe piece on two sides of the position where the transverse deformation of each ring is the largest.
Further, two sets of the tensioning connectors are respectively arranged at one third and two thirds of the width of the tube sheet.
Further, the step of providing the segments on both sides of the position of maximum lateral deformation with tensioning connectors comprises:
and drilling mounting holes on the pipe sheets on the two sides, injecting bar-planting glue into the mounting holes, and respectively inserting the two ends of the tensioning connecting piece into the mounting holes for firm mounting.
Further, the step of adjusting the tensioning connectors to enable the segments on the two sides to inwardly converge to a set position comprises:
setting horizontal convergence points at the middle positions of the pipe pieces on two sides of the position with the largest transverse deformation;
and adjusting the tensioning connecting piece, and measuring the deformation of the horizontal convergence point to enable the duct piece to inwardly converge to a set position.
Further, the step of pouring grouting materials into gaps behind the duct pieces on two sides comprises the following steps:
grouting holes are distributed on the pipe pieces on the two sides and communicated with the holes on the back of the pipe pieces;
installing a grouting pipe and firmly anchoring the grouting pipe;
and connecting a grouting pipeline, and filling grouting materials into the gap behind the duct piece.
In another aspect of the present application, there is provided an renovation tool for transverse deformation of a shield tunnel, which is applied to the renovation method described in any one of the above, the renovation tool comprising:
the measuring instrument is used for determining the position of the shield tunnel with the largest transverse deformation of the segment and measuring the deformation of the segment at two sides of the position with the largest transverse deformation;
the tensioning connecting piece is connected with the duct pieces on two sides of the position with the largest transverse deformation;
the drilling equipment is used for drilling an installation hole for arranging the tensioning connecting piece and a grouting hole for grouting a gap behind the duct piece on the two sides; and
and the grouting equipment is used for grouting materials into gaps behind the duct pieces on two sides.
Further, the tension link includes:
an anchor bolt having one end anchored to the tube sheet on each side;
the connecting sleeve is connected with the other end of the anchoring bolt; and
and the two ends of the fastening bolt are respectively connected with the connecting sleeves at the two sides, and the fastening bolt is adjusted to enable the pipe pieces at the two sides to inwardly converge to a set position.
The embodiment of the application provides a method for renovating transverse deformation of a shield tunnel, at first, confirm the biggest position of the section of jurisdiction transverse deformation of a deformation section shield tunnel, the section of jurisdiction in the biggest position both sides of transverse deformation sets up the tensioning connecting piece, the section of jurisdiction through adjusting the tensioning connecting piece messenger both sides inwards converges to the preset position, reduce the transverse deformation of the section of jurisdiction of shield tunnel, make the great regional section of jurisdiction transverse deformation of section of jurisdiction behind one's back and produce certain space between the stratum, space behind the section of jurisdiction to both sides is grouting material again, the tensioning connecting piece is demolishd after grouting material solidifies and reaches preset intensity, reach the purpose of renovating the transverse deformation of the section of shield tunnel. The method and the tool for remedying the transverse deformation of the shield tunnel have the advantages of being simple to operate and low in cost.
Drawings
FIG. 1 is a flow chart of a method for remedying the transverse deformation of the shield tunnel in the embodiment of the present application;
FIG. 2 is a schematic structural diagram illustrating a process of remedying lateral deformation of a shield tunnel according to an embodiment of the present application; and
FIG. 3 is a schematic structural diagram of a mounting hole and a grouting hole drill arranged on a segment in the embodiment of the application.
Description of the reference numerals
1. A duct piece; 2. tensioning the connecting piece; 10. grouting holes; 11. mounting holes; 12. a convergence point; 20. an anchor bolt; 21. a connecting sleeve; 22. and fastening the bolt.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
The directional terms used in the description of the present application are intended only to facilitate the description of the application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the application.
In one aspect of the embodiments of the present application, a method for remedying lateral deformation of a shield tunnel is provided, as shown in fig. 1, including the following steps:
s1: determining the position of the shield tunnel with the largest transverse deformation of the segment;
s2: tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation;
s3: adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a preset position;
s4: grouting materials into gaps behind the duct pieces on two sides;
s5: and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength.
The method for renovating the transverse deformation of the shield tunnel provided by the embodiment of the application comprises the steps of firstly determining the position where the transverse deformation of a segment 1 of the shield tunnel at the deformation section is the largest, arranging the tensioning connecting pieces 2 on the segment 1 at two sides of the position where the transverse deformation is the largest, enabling the segment 1 at two sides to inwards converge to the preset position by adjusting the tensioning connecting pieces 2, reducing the transverse deformation of the segment 1 of the shield tunnel, enabling a certain gap to be formed between the back of the area where the transverse deformation of the segment 1 is larger and the stratum, then pouring a grouting material into the gap behind the segment 1 at two sides, dismantling the tensioning connecting pieces 2 after the grouting material is solidified to reach the preset strength, and renovating the transverse deformation of the shield tunnel. The method for remedying the transverse deformation of the shield tunnel has the advantages of being simple to operate and low in cost.
The method of remediating the examples of the present application will now be described in detail with reference to specific examples.
S1: and determining the position of the shield tunnel with the largest transverse deformation of the segment.
In an embodiment, referring to fig. 1, step S1 specifically includes:
measuring the segment 1 of the shield tunnel at the deformation section to obtain the transverse deformation value of each ring of segment 1;
and measuring the position of the maximum transverse deformation position of each ring of the pipe piece 1 according to the measurement result.
The method for measuring the deformation of the duct piece 1 comprises a convergence meter, geodetic measurement, a Basette convergence system and GPS receiver measurement, which can only provide observation data of a single discrete point, and the method comprises the steps of measuring by a three-dimensional laser scanner, acquiring three-dimensional point cloud coordinates of a measured object by a laser ranging method by the three-dimensional laser scanning technology, and then drawing an inner contour curve chart of the deformed duct piece 1 according to a measurement result. And measuring the position of the maximum transverse deformation position of each ring of the pipe piece 1 by using a distance measuring instrument according to the measured data, wherein the distance measuring instrument comprises an optical theodolite, an electronic theodolite, a semi-station electronic tacheometer and a total-station electronic tacheometer. And determining the reduction value of the transverse deformation of each ring of pipe pieces 1 according to the measurement result, and setting the preset position of inward convergence of each ring of pipe pieces 1.
In one embodiment, a three-dimensional laser scanner is used to measure segment 1 of the deformed shield tunnel. The traditional deformation measurement method comprises a convergence meter, geodetic survey, a Basette convergence system and GPS receiver survey, which can only provide observation data of a single discrete point, cannot comprehensively reflect the deformation condition of the tunnel, and has low measurement efficiency. The three-dimensional laser scanning technology obtains the three-dimensional point cloud coordinates of the measured object through a laser ranging method, can comprehensively acquire the whole information of the tunnel, and has higher precision.
In one embodiment, a total station is used to measure the position of the maximum lateral deformation of each ring of segments 1. A Total Station, i.e. a Total Station type Electronic distance meter (Electronic Total Station), is a high-tech measuring instrument integrating light collection, mechanical measurement and electrical measurement, and is a surveying instrument system integrating horizontal angle, vertical angle, distance (slant distance, horizontal distance) and height difference measurement functions. Compared with the optical theodolite, the electronic theodolite changes the optical scale into the photoelectric scanning scale, and replaces manual optical micrometer reading with automatic recording and displaying reading, so that the angle measurement operation is simplified, and the generation of reading errors can be avoided. The total station is called because the instrument can be arranged once to complete all measurement work on the station. The method is widely applied to the field of precision engineering measurement or deformation monitoring of overground large-scale buildings, underground tunnel construction and the like. And measuring the position of the maximum transverse deformation position of each ring of the pipe piece 1 by using a total station according to the measurement result, and marking the left side and the right side of the pipe piece 1, for example, marking with red paint.
S2: and tensioning connecting pieces are arranged on the pipe pieces on two sides of the position with the maximum transverse deformation.
In an embodiment, referring to fig. 1 and fig. 2, step S2 specifically includes: two groups of tensioning connecting pieces 2 are arranged on the pipe piece 1 at two sides of the position where each ring has the largest transverse deformation.
Tensioning connecting piece 2 is connected between the section of jurisdiction 1 of every ring lateral deformation biggest position both sides, can adjust the size that produces tensile to section of jurisdiction 1 through the elasticity degree of adjustment tensioning connecting piece 2. Can set up a set of or multiunit tensioning connecting piece 2, preferred between the section of jurisdiction 1 of every ring lateral deformation biggest position both sides, this application sets up two sets of tensioning connecting pieces 2 between the section of jurisdiction 1 of both sides, can guarantee that tensioning connecting piece 2 can not be because of pulling too big damage inefficacy, can not be because of setting up too much tensioning connecting piece 2 extravagant resource and reduce the efficiency of construction again.
In one embodiment, two sets of tension links 2 are provided at one third and two thirds of the width of the tube sheet 1, respectively, as shown in fig. 2. Tensioning connecting piece 2 sets up on the collinear between the section of jurisdiction 1 of both sides, guarantees that the atress is the horizontally, prevents to produce the slant atress and leads to section of jurisdiction 1 structure to be damaged, influences shield structure intensity. Two sets of tensioning connecting pieces 2 are respectively arranged at one third and two thirds of the width of the duct piece 1, so that the duct piece 1 is stressed uniformly and converged uniformly inwards.
In an embodiment, referring to fig. 1 and fig. 2, step S2 further includes: drilling mounting holes 11 on the duct pieces 1 on the two sides, injecting bar-planting glue into the mounting holes 11, and inserting the two ends of the tensioning connecting piece 2 into the mounting holes 11 respectively to be firmly mounted.
The bar planting adhesive has the characteristics of high bonding strength, small shrinkage in the normal-temperature curing and hardening processes, excellent toughness and impact resistance after curing, convenience in construction and the like. For example, the mounting holes 11 are drilled in one third and two thirds of the width of the duct piece 1 on both sides, dust in the mounting holes 11 is cleaned by a special air cylinder, a brush or a compressed air machine, and the cleaning is repeated for not less than 3 times to clean the dust and the open water in the mounting holes 11. The bar planting glue is injected into the drill hole by a special tool, and then the two ends of the tensioning connecting piece 2 are respectively inserted into the bottom of the mounting hole 11, so that glue overflow of the orifice of the mounting hole 11 is ensured, and glue leakage is prevented by paying attention. Preferably, the bar planting glue is A-grade bar planting glue.
Specifically, the aperture of the mounting hole 11 is 35mm to 45mm, and the depth of the mounting hole 11 is 22cm to 32 cm. Preferably, the diameter of the mounting hole 11 is 40mm, and the depth of the mounting hole 11 is 27 cm. Sufficient mounting hole 11 size and the 11 degree of depth of mounting hole guarantee the sufficient anchor power of tensioning connecting piece 2, and too big mounting hole 11 size and the 11 degree of depth of mounting hole not only can influence the efficiency of construction, still can cause the damage to section of jurisdiction 1 structure, influence the intensity and the life of section of jurisdiction 1.
In one embodiment, referring to fig. 2, the tension link 2 includes: anchor bolt 20, connecting sleeve 21 and fastening bolt 22. One end of the anchor bolt 20 is anchored on the segment 1 on each side, the connecting sleeve 21 is connected with the other end of the anchor bolt 20, the two ends of the fastening bolt 22 are respectively connected with the connecting sleeves 21 on the two sides, and the fastening bolt 22 is adjusted to enable the segment 1 on the two sides to inwardly converge to a set position. Tensioning connecting piece 2 passes through anchor bolt 20 fixed connection on the section of jurisdiction 1 of both sides, and the one end of two connecting sleeve 21 in tensioning connecting piece 2 is through being connected with anchor bolt 20, fixes respectively on the section of jurisdiction 1 of both sides, and the connecting sleeve 21 of both sides is connected respectively at the both ends of fastening bolt 22, through the elasticity of adjusting fastening bolt 22, makes the section of jurisdiction 1 of both sides inwards converge to setting for the position, reduces the lateral deformation of the section of jurisdiction 1 of shield tunnel.
It will be appreciated that in other embodiments, the tension link 2 may also comprise other components with telescopic function, such as an electric telescopic cylinder, a hydraulic telescopic cylinder, a pneumatic telescopic cylinder, etc. Power is provided for the tensioning connecting piece 2 through an external power source, the labor intensity of adjusting the tensioning connecting piece 2 is reduced, and the working efficiency of adjusting the tensioning connecting piece 2 is improved.
S3: and adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a preset position.
In an embodiment, referring to fig. 2, the step S3 specifically includes:
arranging horizontal convergence points 12 at the middle positions of the pipe piece 1 on the two sides of the position with the largest transverse deformation;
and adjusting the tensioning connecting piece 2, and measuring the deformation of the horizontal convergence point 12 to enable the duct piece 1 to inwardly converge to a preset position.
A horizontal convergence point 12 is arranged in the middle of the duct piece 1 on the two sides of the position with the largest transverse deformation, and the convergence condition of the duct piece 1 is monitored by monitoring the position of the convergence point 12. The method comprises the steps of measuring a deformation section shield segment 2 by adopting a three-dimensional laser scanning technology, drawing a profile curve graph in the segment 2 according to a measuring result, formulating a transverse deformation reduction value of each ring of segment 2, and setting the position to which the deformation section shield segment can be restored as a preset position. Through adjustment tensioning connecting piece 2, increase the pulling force to the section of jurisdiction 1 of both sides gradually, make section of jurisdiction 1 slowly even inwards converge, reduce transverse deformation, measure the deflection of horizontal convergence point 12 through the measuring instrument and make section of jurisdiction 1 inwards converge to preset the position. Preferably, the measuring instrument is a convergence meter.
S4: and grouting materials are poured into gaps behind the pipe pieces on the two sides.
In an embodiment, referring to fig. 1 and fig. 2, the step S4 specifically includes:
drilling grouting holes 10 on the duct pieces 1 on the two sides, wherein the grouting holes 10 are communicated with holes on the back of the duct pieces 1;
mounting a grouting pipe in the grouting hole 10, and firmly anchoring the grouting pipe;
connecting a grouting pipeline, and filling grouting materials into the back gap of the duct piece 1.
Through adjustment tensioning connecting piece 2, make section of jurisdiction 1 slowly evenly inwards converge, reduce transverse deformation, section of jurisdiction 1 transverse deformation great region behind one's back and between the stratum produce certain space, bore on section of jurisdiction 1 of both sides and establish slip casting hole 10, the hole behind one's back of section of jurisdiction is communicated to slip casting hole 10, install the slip casting pipe in slip casting hole 10, it is firm to anchor the slip casting pipe, connect the slip casting pipeline, to section of jurisdiction 1 back of the body space perfusion slip casting material, reach the mesh of renovating shield tunnel transverse deformation.
Specifically, 2 grouting holes 10 are drilled in each ring of pipe piece 1, the aperture of each grouting hole 10 is 12-20 mm, the pipe diameter of each grouting pipe is 8-12 mm, and each grouting pipe is firmly anchored by an anchoring agent. Preferably, the aperture of the grouting hole 10 is 16mm, and the pipe diameter of the grouting pipe is 10 mm. And connecting a grouting pipeline, grouting into the back gap of the duct piece 1, and stopping grouting when the grouting pressure and the grouting amount reach design values. The grouting material is selected from the grouting materials with early strength, quick hardness, high strength and no shrinkage.
In another aspect of the present application, there is provided an improvement tool for transverse deformation of a shield tunnel, which is applied to the improvement method of any one of the above embodiments, the improvement tool including:
the measuring instrument is used for determining the position of the shield tunnel with the largest transverse deformation of the segment 1 of the deformed shield tunnel and measuring the deformation of the segment 1 on two sides of the position with the largest transverse deformation;
the tensioning connecting piece 2 is connected with the duct pieces 1 on two sides of the position with the largest transverse deformation;
the drilling equipment is used for drilling a mounting hole 11 for arranging the tensioning connecting piece 2 and a grouting hole 10 for grouting into a gap behind the duct piece 1 on two sides; and
and the grouting equipment is used for grouting materials into gaps behind the duct pieces 1 on the two sides.
In one embodiment, referring to fig. 2, the tension link 2 includes: anchor bolt 20, connecting sleeve 21 and fastening bolt 22. One end of the anchor bolt 20 is anchored on the segment 1 on each side, the connecting sleeve 21 is connected with the other end of the anchor bolt 20, the two ends of the fastening bolt 22 are respectively connected with the connecting sleeves 21 on the two sides, and the fastening bolt 22 is adjusted to enable the segment 1 on the two sides to inwardly converge to a set position. Tensioning connecting piece 2 passes through anchor bolt 20 fixed connection on the section of jurisdiction 1 of both sides, and the one end of two connecting sleeve 21 in tensioning connecting piece 2 is through being connected with anchor bolt 20, fixes respectively on the section of jurisdiction 1 of both sides, and the connecting sleeve 21 of both sides is connected respectively at the both ends of fastening bolt 22, through the elasticity of adjusting fastening bolt 22, makes the section of jurisdiction 1 of both sides inwards converge to setting for the position, reduces the lateral deformation of the section of jurisdiction 1 of shield tunnel.
Specifically, the diameter of the anchor bolt 20 is 25mm to 40 mm. Preferably, the diameter of the anchor bolt 20 is 33mm, the hole depth of the mounting hole 11 is 27cm, a proper amount of grade-A bar planting glue is injected into the mounting hole 11, then the anchor bolt 20 is inserted into the hole to be firmly mounted, and the exposed length of the anchor bolt 20 is 15 cm.
In an embodiment, the measurement instrument comprises a three-dimensional laser scanner, a total station, and a convergence gauge. This application adopts three-dimensional laser scanner to measure the section of jurisdiction 1 in the shield tunnel of deformation section to profile curve graph in drawing section of jurisdiction 1 according to measuring result formulates every ring section of jurisdiction 1 lateral deformation and reduces the value, and the whole information in collection tunnel that three-dimensional laser scanning technique can be comprehensive, and has higher precision. The total station is used for measuring the position of the maximum transverse deformation position of each ring of pipe piece 1, and the total station is widely applied to the field of measurement or deformation monitoring of precision engineering such as aboveground large buildings, underground tunnel construction and the like. The present application also employs the amount of deformation of the horizontal convergence point 12 of the contraction gauge to cause the segment 1 to inwardly converge to a set position.
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for remedying transverse deformation of a shield tunnel is characterized by comprising the following steps:
determining the position of the shield tunnel with the largest transverse deformation of the segment;
tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation;
adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a preset position;
grouting materials into gaps behind the back of the duct pieces on two sides;
and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength.
2. The method according to claim 1, wherein the step of determining the position of the deformed segment of the shield tunnel where the lateral deformation of the segment is the largest comprises:
measuring the segments of the shield tunnel at the deformation section to obtain the transverse deformation value of each ring of segments;
and measuring the position of the maximum transverse deformation position of each ring of the pipe piece according to the measurement result.
3. The method of claim 2, wherein the segments of a deformed segment shield tunnel are measured using a three-dimensional laser scanner; and/or measuring the position of the maximum transverse deformation position of each ring of the pipe piece by using a total station.
4. The method of claim 1, wherein the step of providing said segments on opposite sides of a location of maximum lateral deformation with tensioning connectors comprises:
two groups of tensioning connecting pieces are arranged on the pipe piece on two sides of the position where the transverse deformation of each ring is the largest.
5. The method of claim 4, wherein two sets of said tensioning connectors are provided at one-third and two-thirds of the width of said tube sheet, respectively.
6. The method of claim 1, wherein the step of providing said segments on opposite sides of a location of maximum lateral deformation with tensioning connectors comprises:
and drilling mounting holes on the pipe sheets on the two sides, injecting bar-planting glue into the mounting holes, and respectively inserting the two ends of the tensioning connecting piece into the mounting holes for firm mounting.
7. The method of claim 1, wherein the step of adjusting the tensioning connection to inwardly converge the segments on either side to a predetermined position comprises:
setting horizontal convergence points at the middle positions of the pipe pieces on two sides of the position with the largest transverse deformation;
and adjusting the tensioning connecting piece, and measuring the deformation of the horizontal convergence point to enable the duct piece to inwardly converge to a preset position.
8. The method of claim 1, wherein the step of injecting grouting material into the space behind the back of the duct pieces on both sides comprises:
drilling grouting holes on the duct pieces on the two sides, wherein the grouting holes are communicated with holes on the back of the duct pieces;
mounting a grouting pipe in the grouting hole, and firmly anchoring the grouting pipe;
and connecting a grouting pipeline, and filling grouting materials into the gap behind the duct piece.
9. An improvement tool for transverse deformation of a shield tunnel, which is applied to the improvement method of any one of claims 1 to 8, and comprises:
the measuring instrument is used for determining the position of the shield tunnel with the largest transverse deformation of the segment and measuring the deformation of the segment at two sides of the position with the largest transverse deformation;
the tensioning connecting piece is connected with the duct pieces on two sides of the position with the largest transverse deformation;
the drilling equipment is used for drilling an installation hole for arranging the tensioning connecting piece and a grouting hole for grouting a gap behind the duct piece on the two sides; and
and the grouting equipment is used for grouting materials into gaps behind the duct pieces on two sides.
10. The orthopedic tool of claim 9, wherein the tensioning connection comprises:
an anchor bolt having one end anchored to the tube sheet on each side;
the connecting sleeve is connected with the other end of the anchoring bolt; and
and the two ends of the fastening bolt are respectively connected with the connecting sleeves on the two sides, and the fastening bolt is adjusted to enable the pipe pieces on the two sides to inwardly converge to a preset position.
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| CN202010434531.7A CN111648775A (en) | 2020-05-20 | 2020-05-20 | Method and tool for renovating transverse deformation of shield tunnel |
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| CN202010434531.7A CN111648775A (en) | 2020-05-20 | 2020-05-20 | Method and tool for renovating transverse deformation of shield tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112329122A (en) * | 2021-01-07 | 2021-02-05 | 湖南大学 | A method for determining lateral deformation and internal force of shield tunnel caused by excavation of side foundation pit |
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