CN201857980U - Shield tunnel segment joint waterproof sealing gasket - Google Patents
Shield tunnel segment joint waterproof sealing gasket Download PDFInfo
- Publication number
- CN201857980U CN201857980U CN2010201573968U CN201020157396U CN201857980U CN 201857980 U CN201857980 U CN 201857980U CN 2010201573968 U CN2010201573968 U CN 2010201573968U CN 201020157396 U CN201020157396 U CN 201020157396U CN 201857980 U CN201857980 U CN 201857980U
- Authority
- CN
- China
- Prior art keywords
- section
- sealing mat
- shield tunnel
- sealing gasket
- waterproof sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model belongs to the field of tunnel engineerings and particularly relates to a shield tunnel segment joint waterproof sealing gasket. A plurality of comb tooth shaped bulges are arranged below the fracture surface of the sealing gasket, wherein a plurality of circular holes are formed above the comb tooth shaped bulges, and the circular holes and the comb tooth shaped bulges are distributed symmetrically to the central axis of the fracture surface; and the top edge of the fracture surface of the sealing gasket is parallel to the bottom edge of the fracture surface, the left side edge and the right side edge are symmetrical, the side edge of the fracture surface comprises a circular arc shaped curve at the upper part and a straight line at the lower part, and the middle point of the side edge is a merge point of the circular arc shaped curve and the straight line. The shield tunnel segment joint waterproof sealing gasket has the advantages that since the form of the fracture surface with balanced contact stress and closing compression force is designed for the sealing gasket, on one hand, the contact stress meets the requirement of waterproofing pressure, and on the other hand, the closing compression force is reduced to the greatest extent, and the piecing quality of the segments is ensured; and the contact stress on the contact surface of the sealing gasket is evenly distributed, so that the problem of stress concentration can be effectively solved, and the durability is better.
Description
Technical field
The utility model belongs to the construction of tunnel field, the concrete uniform duct pieces of shield tunnel seam waterproof of the distribution of contact sealing mat that is meant on a kind of contact surface.
Background technology
At present, shield tunnel adopts the reinforced concrete segment lining cutting more, and the waterproof measure of segment joint is the most important.Usually the countermeasure of seam waterproof is to use encapsulant, and the unexpansive synthetic rubber of the main employing in Europe by the elasticity densification, comes sealing with the contact surface compressive stress.The process of sealing mat sealing be rubber bodies under the elastic recovering force effect, produce bigger distortion at contact surface, thereby filled on the contact surface rough and uneven in surface on the microcosmic, stop liquid flowing in contact gap, reach the purpose of sealing.Be contained in rubber gasket in the concrete pipe sheet groove by compression the time, just initial contact surface produced elastic recovery stress
P 0Do the time spent when it is subjected to fluid pressure, also will on contact surface, produce subsidiary stress
P 1, this is similar to the filling theory self-tightening.As shown in Figure 1, number in the figure 1 is a seal groove, and 2 indicate elaxtic seal,
P 0Be sealing mat elastic recovery stress,
P 1The subsidiary stress that the sealing mat self-tightening produces on contact surface,
P wFor acting on the hydraulic pressure on the section of jurisdiction.The stress that contact surface is total
PFor:
P=
P 0+
P 1
When
P w α P=α (
P 0+
P 1)=
α(
P=
P 0+
β P 0) time, seepage promptly takes place.
In the formula
α,
βBe the rubber gasket coefficient, determine by experiment and engineering experience, wherein
αIt is relevant with material, the coupling surface surface appearance of encapsulant,
βRelevant with material hardness, form of fracture.
Every meter of sealing mat is compressed to fully that needed power is defined as closed compressive force in the groove of section of jurisdiction, and construction experience shows when closed compressive force is excessive will influence the pipe sheet assembling quality, and the piece that wherein binds is particularly outstanding.Piece two side-friction forces when last several centimetres of jacking that bind are excessive, the sealing mat extruding is pulled apart take out of easily, even the top may occur and do not enter, by loosening adjacent block bolt jacking by force, this makes that the ring of assembly unit is not round, and the section of jurisdiction amount of opening, fissure of displacement amount all increase severely, and influence waterproof effect.During the design of shield tunnel sealing mat, the closed compressive force of general requirements is no more than 60KN.
For satisfying the waterproofing pressure requirement, sealing mat contact stress is the bigger the better; Simultaneously, in order to reduce the assembly unit error, the amount of opening, the fissure of displacement amount of control section of jurisdiction require closed compressive force the smaller the better.Calculating and experimental data show, contact stress becomes approximate proportional relation within the specific limits with closed compressive force, contact stress improves generally can cause closed compressive force raising, and this is the contradiction place of non-expanded rubber sealing mat design, need find the equalization point of the two by optimization.Under rubber material one stable condition, form of fracture is one of key factor that influences contact stress and clossing pressure.It is enough big to want contact stress, and closed compressive force does not exceed standard simultaneously, must constantly adjust the sealing mat form of fracture.At present, in the design of sealing mat form of fracture, do not consider the optimum of contact stress and two indexs of closed compressive force.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, a kind of duct pieces of shield tunnel seam waterproof sealing mat is proposed, consider the optimization of contact stress and two indexs of closed compressive force, appropriate design the section structure of sealing mat, adopt means such as numerical simulation, laboratory experiment, site operation to verify that the distribution of contact on the sealing mat contact face is even, can effectively solve problem of stress concentration, do not influence the pipe sheet assembling quality, satisfy waterproofing pressure requirement in the construction of tunnel.
The purpose of this utility model realizes being finished by following technical scheme:
A kind of duct pieces of shield tunnel seam waterproof sealing mat, has the mesothyrid section, the top margin of section is parallel with the base, limit, left and right sides symmetry, sealing pad section below is provided with some broach shape projectioies, be provided with some circular holes above described broach shape projection, described circular hole is an arc shaped to be arranged, and described circular hole and broach shape projection all are symmetrical in the section axis and distribute.
The width of above-mentioned broach shape projection on the section base is identical.
The sealing mat section is that section axis on broach shape protrusion direction is without circular hole or broach shape projection.
Being directly proportional between the section axis on the broach shape protrusion direction of above-mentioned Circularhole diameter and this circular hole center of circle apart from size.
Sealing mat section side is made of a circular curve and a straight line, and side top is circular curve, and the side bottom is a straight line, and the side mid point is the merge point of described circular curve and straight line.
Above-mentioned waterproof sealing gasket is the EPT rubber packing pad.
The utility model has the advantages that, the utility model sealing mat design has contact stress and closed compressive force, and the two reaches the form of fracture of balance, makes contact stress satisfy the waterproofing pressure requirement on the one hand, on the other hand, make the closed compression amount of overcoming little, the pipe sheet assembling quality is guaranteed.Distribution of contact on the sealing mat contact face is even, can effectively solve problem of stress concentration, and its durability is better.
Description of drawings
Fig. 1 is a sealing mat surface contact stress schematic diagram;
Fig. 2 is a comb shape sealing mat section structure schematic diagram;
Fig. 3 is trapezoidal I II sealing mat section structure schematic diagram;
Fig. 4 is trapezoidal II sealing mat section structure schematic diagram;
Fig. 5 is middle hole shape sealing mat section structure schematic diagram;
Fig. 6 is the utility model sealing mat section structure schematic diagram.
The specific embodiment
The utility model feature and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Label 1-12 representative is seal groove 1, elaxtic seal 2, hydro-expansive rubber 3, neoprene 4, ethylene propylene diene rubber 5, top margin 6, base 7, circular curve 8, straight line 9, broach shape projection (broach) 10, circular hole 11, section axis 12 among the accompanying drawing 1-6.
Under rubber material one stable condition, form of fracture is one of key factor that influences contact stress and clossing pressure.Unexpansive rubber gasket form of fracture various ways once occurred early based on square in the evolution, as " thanking to the Mansfield moral " type (hole shape promptly), " Antwerp " type, " Munich " type (being comb shape) of European countries.Use at present more form of fracture to have three kinds in the engineering: trapezoidal, comb shape and middle hole shape, see accompanying drawing 2-Fig. 5, its material mostly is combining of ethylene propylene diene rubber 5, hydro-expansive rubber 3 and ethylene propylene diene rubber 5 or hydro-expansive rubber 3 and neoprene 4.It is enough big to want contact stress, and closed compressive force does not exceed standard simultaneously, must constantly adjust the sealing mat form of fracture.At present, in the design of sealing mat form of fracture, do not consider the optimum of contact stress and two indexs of closed compressive force.
The utility model has contrasted all kinds of form of fractures, and drawing two indexs of mesothyrid form of fracture contact stress and clossing pressure can better be met.By continuous adjustment mesothyrid section geometricshape size, pore quantity and position, obtained the utility model form of fracture, see accompanying drawing 6.And adopting means such as numerical simulation, laboratory experiment, site operation to verify that its waterproofing pressure satisfies the 0.6Mpa requirement, clossing pressure is less than 60KN, is applicable to that edpth of tunnel in the city underground equals the construction of tunnel of 20m for a short time.
Carry out simulation of elastic sealing gasket compressive non-linearity and Aided Design by the finite element numerical method, determine preliminary form of fracture.Use preliminary form of fracture processing laboratory experiment test specimen again, with " T " word seam and its waterproof ability of " one " word seam watertightness experimental check, with its closed compressive force of compressive strain measuring, so circulation all meets the demands up to two indexs.The utility model is exactly through repeatedly calculating, test circulation, the reasonable form of fracture that final two indexs determining all meet the demands.
As shown in Figure 6, be the utility model sealing mat section structure schematic diagram.In the present embodiment, sealing mat is the EPT rubber packing pad.Sealing mat form of fracture design objective is: the design waterproofing pressure is greater than 0.6Mpa, and closed compressive force is less than 60KN.
As seen from Figure 6, sealing mat has the mesothyrid section, and the top margin 6 of section is parallel with base 7, limit, left and right sides symmetry, and the section below is provided with some broach shape projectioies 10.The wide 30mm of section top margin, the wide 32mm in base highly is 16mm.The top margin 6 of section is parallel with base 7, limit, left and right sides symmetry.In the present embodiment, sealing mat has four broach shape projectioies 10, even, the linear transitions smooth of broach 10 thickness, and the width of broach 10 on section base 7 is identical.Be provided with four circular holes 11 above broach 10, circular hole is a row, is arc shaped and arranges, being directly proportional apart from size between the section axis 12 on the broach shape protrusion direction of circular hole 11 diameters and this circular hole center of circle.Circular hole 11 and broach 10 all are symmetrical in section axis 11 and distribute.Section axis 12 on broach shape protrusion direction is without circular hole 11 or broach shape projection 10.
The top margin 6 of sealing mat section is parallel with base 7, limit, left and right sides symmetry, and the section side is made of a circular curve 8 and a straight line 9, and side top is circular curve 8, and the side bottom is a straight line 9, and the side mid point is the merge point of described circular curve and straight line.Wherein, the radius of circular curve is 18mm.
In four circular holes, two Circularhole diameters of contiguous section side are 5.5mm, and two center of circle spacings are 23.6mm; All the other two Circularhole diameters are 6mm, and two center of circle spacings are 8.6mm.Diameter is that the circular hole of 6mm is 5mm apart from the section upper topside, and diameter is that the circular hole of 5.5mm is 6.8mm apart from the section upper topside.Promptly relatively little circular hole is provided with the position on the lower side.
The sealing mat material should be ethylene propylene diene rubber 5, and rubber material hardness is 62
3 degree (Shao Er A), section machining accuracy are answered compliant control requirement.
When built tunnel piping is second-rate cause the section of jurisdiction amount of opening at 6mm so that interior, fissure of displacement amount is in 10mm, the sealing mat water resistance can satisfy the design waterproofing pressure requirement of 0.6Mpa equally.
When installing and using,, determine seam waterproof sealing mat type,, when edpth of tunnel equals 20m for a short time, can directly use this form of fracture if adopt unexpansive rubber gasket at first according to the construction of tunnel concrete condition; When buried depth during greater than 20m, can increase profile height, again in conjunction with methods such as finite element simulation calculation, laboratory experiments, determine to meet the section new high degrees of design waterproofing pressure and two control of closed compressive force index, to change the section processing sealing mat behind the height.In addition, the section machining accuracy will be by the standard control of testing; Ethylene propylene diene rubber hardness will be controlled at 62
3 degree (Shao Er A).
Adopt the sealing mat of the utility model form of fracture, can satisfy the metro shield tunnel water proofing demand that buried depth equals 20m for a short time, and it is that 6mm, fissure of displacement amount are in the 10mm time that the pipe sheet assembling error is controlled at the amount of opening, and water resistance can satisfy the demand in 20m buried depth tunnel equally.
The utility model form of fracture belongs to the macroporous type section, and is easier to be controlled than other its machining accuracy of mesothyrid section.Distribution of contact on the sealing mat contact face is even, can effectively solve problem of stress concentration, and its durability is better.
Claims (6)
1. duct pieces of shield tunnel seam waterproof sealing mat, has the mesothyrid section, the top margin of section is parallel with the base, limit, left and right sides symmetry, it is characterized in that sealing pad section below is provided with some broach shape projectioies, be provided with some circular holes above described broach shape projection, described circular hole is an arc shaped to be arranged, and described circular hole and broach shape projection all are symmetrical in the section axis and distribute.
2. a kind of duct pieces of shield tunnel seam waterproof sealing mat as claimed in claim 1 is characterized in that the width of described broach shape projection on the section base is identical.
3. a kind of duct pieces of shield tunnel seam waterproof sealing mat as claimed in claim 1 is characterized in that sealing pad section is that section axis on broach shape protrusion direction is without circular hole or broach shape projection.
4. a kind of duct pieces of shield tunnel seam waterproof sealing mat as claimed in claim 1 is characterized in that being directly proportional apart from size between the section axis on the broach shape protrusion direction of described Circularhole diameter and this circular hole center of circle.
5. a kind of duct pieces of shield tunnel seam waterproof sealing mat as claimed in claim 1, it is characterized in that described sealing mat section side is made of a circular curve and a straight line, side top is circular curve, and the side bottom is a straight line, and the side mid point is the merge point of described circular curve and straight line.
6. a kind of duct pieces of shield tunnel seam waterproof sealing mat as claimed in claim 1 is characterized in that described waterproof sealing gasket is the EPT rubber packing pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201573968U CN201857980U (en) | 2010-04-13 | 2010-04-13 | Shield tunnel segment joint waterproof sealing gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201573968U CN201857980U (en) | 2010-04-13 | 2010-04-13 | Shield tunnel segment joint waterproof sealing gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201857980U true CN201857980U (en) | 2011-06-08 |
Family
ID=44103790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201573968U Expired - Fee Related CN201857980U (en) | 2010-04-13 | 2010-04-13 | Shield tunnel segment joint waterproof sealing gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201857980U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742167A (en) * | 2013-12-30 | 2014-04-23 | 中铁第四勘察设计院集团有限公司 | Tunnel segment structure with difference waterproof capability |
| CN104612723A (en) * | 2015-02-02 | 2015-05-13 | 同济大学 | Waterproof sealing structure for duct pipe connecting joint of shield tunnel |
| CN104930972A (en) * | 2015-06-18 | 2015-09-23 | 同济大学 | Shield tunnel segment elastic gasket section detection method |
| CN109113767A (en) * | 2018-09-11 | 2019-01-01 | 中国科学院武汉岩土力学研究所 | A kind of test tunnel duct piece waterproof sealing gasket and preparation method thereof |
| CN109209433A (en) * | 2018-10-31 | 2019-01-15 | 上海隧道工程有限公司 | The built-in process of section of jurisdiction gasket |
| CN109297658A (en) * | 2018-09-19 | 2019-02-01 | 同济大学 | A method of test shield duct piece waterproof sealing gasket sealing performance |
-
2010
- 2010-04-13 CN CN2010201573968U patent/CN201857980U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742167A (en) * | 2013-12-30 | 2014-04-23 | 中铁第四勘察设计院集团有限公司 | Tunnel segment structure with difference waterproof capability |
| CN103742167B (en) * | 2013-12-30 | 2016-06-22 | 中铁第四勘察设计院集团有限公司 | Possesses the Structural Test of Tunnel Segments of difference waterproof ability |
| CN104612723A (en) * | 2015-02-02 | 2015-05-13 | 同济大学 | Waterproof sealing structure for duct pipe connecting joint of shield tunnel |
| CN104930972A (en) * | 2015-06-18 | 2015-09-23 | 同济大学 | Shield tunnel segment elastic gasket section detection method |
| CN109113767A (en) * | 2018-09-11 | 2019-01-01 | 中国科学院武汉岩土力学研究所 | A kind of test tunnel duct piece waterproof sealing gasket and preparation method thereof |
| CN109297658A (en) * | 2018-09-19 | 2019-02-01 | 同济大学 | A method of test shield duct piece waterproof sealing gasket sealing performance |
| CN109209433A (en) * | 2018-10-31 | 2019-01-15 | 上海隧道工程有限公司 | The built-in process of section of jurisdiction gasket |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201857980U (en) | Shield tunnel segment joint waterproof sealing gasket | |
| CN211085660U (en) | Karst area subway anti-floating simulation device | |
| CN103835263A (en) | Prefabricated ditch | |
| CN110700794A (en) | Multi-branch horizontal well coal seam gas extraction physical simulation experiment system | |
| CN205157336U (en) | Hydraulic pressure testing device for pressure pipe | |
| CN204002858U (en) | A kind of high hydraulic pressure shield tunnel segment joint water-proof elastic sealing mat | |
| CN203161255U (en) | Tunnel network waterproof and drainage structure | |
| CN110705015A (en) | Foam improved soil permeability prediction method based on interaction of foam and soil particles | |
| CN214169950U (en) | Grouting structure of long pore channel of prestressed concrete stiffening beam | |
| CN203034383U (en) | Load reduction high filling arch culvert | |
| CN206368712U (en) | A kind of high hydraulic pressure shield tunnel bolt hole hermetic water-proof structure | |
| CN203034431U (en) | Spigot-and-socket precast ribbed concrete U-shaped channel member | |
| CN102563218A (en) | Nonmetal tube baseboard-penetrating waterproof sleeve | |
| CN112227725A (en) | Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof | |
| CN109681251B (en) | Design method of full-section excavated soft soil tunnel face glass fiber anchor rod | |
| CN105317448A (en) | Elastic sealing gasket for shield tunnel duct pipe seam | |
| CN202090282U (en) | Spheroidal support seat with function of repeated stepless height adjustments | |
| CN114509350B (en) | Segment joint double-channel waterproof test device and method for simulating inner cavity water pressure effect | |
| CN204422378U (en) | A kind of concrete lining pipe piece impermeability test system | |
| CN211623447U (en) | Waterproof sealing gasket for connecting channel segment joint in shield method | |
| CN205742482U (en) | A kind of novel prefabricated assembled rain sewage inspection well chute | |
| CN210890442U (en) | Reinforced steel corrugated pipe structure | |
| CN113202084A (en) | Embedded type sleeve milling joint method for underground diaphragm wall | |
| CN203949766U (en) | Shield duct piece joint anti-permeability performance test unit | |
| CN203654427U (en) | Inspection well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20150413 |
|
| EXPY | Termination of patent right or utility model |