CN115539127A - Sea area tunnel full-wrapping waterproof threshold pressure-relief water-proof and drainage-proof system and construction method - Google Patents
Sea area tunnel full-wrapping waterproof threshold pressure-relief water-proof and drainage-proof system and construction method Download PDFInfo
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- CN115539127A CN115539127A CN202211224493.8A CN202211224493A CN115539127A CN 115539127 A CN115539127 A CN 115539127A CN 202211224493 A CN202211224493 A CN 202211224493A CN 115539127 A CN115539127 A CN 115539127A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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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
- E21D11/381—Setting apparatus or devices
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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
- E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
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Abstract
The invention provides a sea area tunnel full-wrap waterproof threshold pressure-relief water-proof and drainage system and a construction method thereof, wherein the water-proof and drainage system comprises a waterproof system and a drainage system; waterproof system includes geotechnological cloth, waterproof board and waterproofing membrane, drainage system includes the annular drain bar that sets up along tunnel radial cross section upper portion circumference, distribute in the side wall bottom of tunnel both sides and along the vertical drainage blind pipe of the arch foot that tunnel length direction set up, set up in the side ditch of tunnel both sides side wall bottom, and set up in the central escape canal that tunnel invert filling surface central point put, the vertical drainage blind pipe of arch foot lets in the side ditch, the side ditch links to each other through horizontal drain pipe with the central escape canal. The invention can be applied to the field of high-water-pressure sea area mine tunnels, realizes effective control of water discharge in the tunnel by a full-package waterproof concept, and realizes reduction of water pressure at the periphery of the tunnel by a threshold pressure release technology, thereby balancing the water discharge and the water pressure of surrounding rocks.
Description
Technical Field
The invention relates to the field of water-proof and drainage measures of sea area mine tunnels under high water pressure conditions, in particular to a sea area tunnel full-wrapping waterproof threshold pressure-relief water-proof and drainage-proof system and a construction method.
Background
The existing mine method tunnel adopts a limited discharge concept (namely water can enter the tunnel), and the pumping and drainage water in the tunnel is too large under the background of rich water in the sea area, so that the cost is high during operation. In addition, the pure full-package waterproof scheme of a part of tunnels can cause excessive water pressure at the periphery of the tunnels, and great challenges are caused to the durability of tunnel linings and waterproof systems. Therefore, the research and development of a sea area tunnel full-wrapping waterproof threshold pressure-relief water-proof and drainage system and a construction method are problems to be solved urgently.
Disclosure of Invention
In view of the above, the invention aims to provide a sea area tunnel full-wrap waterproof threshold pressure-relief water-proof and drainage-proof system and a construction method, which can achieve a full-wrap waterproof effect, prevent surrounding rock water from entering a tunnel, and reduce the pressure of a water head when the water pressure reaches a certain threshold value, so that the balance between the drainage quantity and the water pressure is realized.
In order to solve the technical problems, the invention adopts the technical scheme that:
a sea area tunnel full-wrap waterproof threshold pressure-relief waterproof and drainage system comprises a waterproof system and a drainage system;
the waterproof system comprises geotextile, a waterproof board and a waterproof coiled material, wherein the geotextile and the waterproof board are sequentially arranged between a primary support and a secondary lining of the tunnel, and the waterproof coiled material is arranged between the waterproof board and the secondary lining;
drainage system includes the annular drain bar that sets up along tunnel radial cross section upper portion circumference, distributes in the vertical drainage blind pipe of hunch foot that the side wall bottom of tunnel both sides just set up along tunnel length direction, sets up in the side ditch of tunnel both sides side wall bottom and set up in the central escape canal that tunnel invert filling surface central point put, the vertical drainage blind pipe of hunch foot lets in the side ditch, the side ditch links to each other through horizontal drain pipe with the central escape canal.
Further, this drainage system of preventing still includes the annular drainage blind pipe that sets up in tunnel invert position to and set up in the vertical drainage blind pipe of invert at tunnel invert center department, the annular drainage blind pipe passes through the four-way pipe with the vertical drainage blind pipe of invert and links to each other, the vertical drainage blind pipe of invert passes through vertical blind union coupling with central escape canal the upper portion end of vertical blind pipe is equipped with the relief valve of removable formula, adjustable threshold value.
Furthermore, waterproofing membrane includes hoop waterproofing membrane and vertical waterproofing membrane, hoop waterproofing membrane and vertical waterproofing membrane alternately overlap joint set up, enclose into waterproof sealing area.
Further, set up the wide two-sided self-adhesive formula hoop waterproofing membrane of 0.5m apart from tunnel hoop 1m department arch wall scope hoop, set up the vertical waterproofing membrane of 0.5m wide two-sided self-adhesive formula along tunnel vertically apart from vertical construction joint 0.5m department simultaneously, hoop waterproofing membrane and vertical waterproofing membrane alternately overlap joint set up, and overlap joint length is not less than 0.2m.
Further, all be equipped with an annular drain bar in the waterproof sealing district that is enclosed by waterproofing membrane on the tunnel hunch wall, the longitudinal drain pipe of hunch foot is located in the waterproof sealing district, the longitudinal separation of two adjacent annular drain bars is unanimous with the interval of hoop construction joint.
Furthermore, the arch foot longitudinal drainage blind pipe is arranged in a subsection mode, an opening is formed in the upper portion of the arch foot longitudinal drainage blind pipe, the length of each section is 9m, two ends of each section of arch foot longitudinal drainage blind pipe are connected with 90-degree elbows, and the arch foot longitudinal drainage blind pipe is led into the side ditch.
Further, when the water pressure reaches a threshold value of 0.5Mpa, the pressure relief valve 13 automatically opens the central drainage ditch for discharging the underground water into the filling surface of the inverted arch of the tunnel.
Furthermore, an annular drainage blind pipe and an inverted arch longitudinal drainage blind pipe are arranged between every two annular construction joints outside the tunnel inverted arch range waterproof plate, and the annular drainage blind pipes and the inverted arch longitudinal drainage blind pipes are connected through a four-way pipe.
A construction method of a sea area tunnel full-wrap waterproof threshold pressure-relief waterproof and drainage system comprises the following steps:
firstly, grouting a stratum, excavating a tunnel cavern and carrying out primary support operation to form an anchor-shotcreting primary support layer;
secondly, after the surface of the primary support is leveled, firstly, geotextile is applied, then waterproof boards are applied to the tunnel arch wall and the inverted arch in a full-circle mode, and the arch wall waterproof boards and the inverted arch waterproof boards are hermetically welded at arch foot positions;
thirdly, applying a double-sided self-adhesive waterproof coiled material on the inner surface of the waterproof board to form a waterproof sealing area between adjacent construction joints;
fourthly, arranging an annular drainage plate and an arch foot longitudinal drainage blind pipe in the sealing area range of the waterproof plate of the arch wall, and introducing underground water into an inner side ditch of the tunnel through the arch foot longitudinal drainage blind pipe after the waterproof plate fails in sealing;
fifthly, arranging an annular drainage blind pipe and an inverted arch longitudinal drainage blind pipe between every two annular construction joints on the outer side of the tunnel inverted arch range waterproof plate, wherein the two annular drainage blind pipes are connected through a four-way pipe; the inverted arch longitudinal drainage blind pipe is communicated with the central drainage ditch through a vertical blind pipe, and the end of the vertical blind pipe is provided with a pressure release valve;
and sixthly, after the quality of the waterproof and drainage system is checked to be qualified, pouring construction of a self-compaction waterproof concrete structure and a secondary lining structure is carried out, and the inverted arch filling part is connected with the side ditch and the central drainage ditch by embedding the transverse drainage pipe.
Furthermore, in the fourth step, a ring longitudinal blind pipe guide and drainage system is laid on the waterproof layer, the ring longitudinal blind pipe guide and drainage system comprises a circumferential concave-convex drainage plate and an arch foot longitudinal drainage blind pipe, the circumferential concave-convex drainage plate is laid along the arch wall at intervals, and the arch foot longitudinal drainage blind pipe is laid between the bottoms of the two side walls.
Compared with the prior art, the sea area tunnel full-package waterproof threshold pressure-relief water-proof and drainage-proof system and the construction method have the following advantages: the invention can be applied to the field of high-water-pressure sea area mine tunnels, realizes effective control of water discharge in the tunnel by a full-package waterproof concept, and realizes reduction of water pressure at the periphery of the tunnel by a threshold pressure release technology, thereby balancing the water discharge and the water pressure of surrounding rocks; by applying the concept of 'prevention and drainage repetition and prevention and drainage combination', the back water pressure of the lining is controlled and reduced through the adjustable threshold pressure relief valve, the problem of overlarge water pressure of the full-blocking lining is avoided, and the problems of environment, resources and energy consumption of the full-drainage lining are also avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a detailed view of the geotextile and the waterproof board of the present invention;
FIG. 3 is a detailed view of the end of the drainage plate and the waterproof plate of the present invention;
FIG. 4 is a plan view showing the arrangement of the waterproof and drainage system of the present invention in the sea area;
FIG. 5 is a plan view of the installation arch wall of the water drainage and prevention system of the present invention in the sea area;
FIG. 6 is a schematic view of the arrangement of the annular drainage plate and the longitudinal blind pipe of the arch wall of the invention.
Description of reference numerals:
01. an inverted arch filling surface; 02. secondary lining; 03. primary support;
1. geotextile; 2. a waterproof sheet; 3. waterproof coiled materials; 3-1, annular waterproof coiled material; 3-2, longitudinal waterproof coiled material; 4. an annular drain plate; 5. the arch springing is a longitudinal drainage blind pipe; 6. a transverse drain pipe; 7. side ditches; 8. a central drainage ditch; 9. an annular drainage blind pipe; 10. an inverted arch longitudinal drainage blind pipe; 11. a four-way pipe; 12. a vertical blind pipe; 13. a pressure relief valve; 14. circumferential construction joints; 15. longitudinal construction joints; 16. waterproof board connecting strip.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The utility model provides a sea area tunnel wraps waterproof threshold value pressure release water discharge prevention system entirely, the tunnel is including invert filling surface 01, secondary lining 02 and preliminary bracing 03 that from top to bottom sets gradually.
As shown in fig. 1 to 4, a sea tunnel full-enclosed waterproof threshold pressure-relief waterproof and drainage system comprises a waterproof system and a drainage system. Waterproof system includes geotechnological cloth 1, waterproof board 2 and waterproofing membrane 3, geotechnological cloth 1 and waterproof board 2 set gradually between the preliminary bracing 03 in tunnel and secondary lining 02, waterproofing membrane 3 sets up between waterproof board 2 and secondary lining 02, keeps apart waterproof subregion through waterproofing membrane 3, the waterproofing membrane material is PVC macromolecular material. Drainage system includes along the annular drain bar 4 that tunnel radial cross section upper portion circumference set up, distributes in the vertical drainage blind pipe of hunch foot 5 that sets up in the side wall bottom of tunnel both sides and along the vertical drainage blind pipe of tunnel length direction, set up in the side ditch 7 of tunnel both sides side wall bottom and set up in the central escape canal 8 that 01 central points put of tunnel invert fill surface, the vertical drainage blind pipe of hunch foot 5 lets in side ditch 7, side ditch 7 links to each other through transverse drainage pipe 6 with central escape canal 8. This drainage system still sets up one annular drainage blind pipe 9 and one vertical drainage blind pipe 10 of invert between every two rings of hoop construction joints in the tunnel invert scope waterproof board outside including setting up in the annular drainage blind pipe 9 at the tunnel invert position to and set up in the vertical drainage blind pipe 10 of invert at tunnel invert center department, annular drainage blind pipe 9 links to each other through four-way pipe 11 with the vertical drainage blind pipe 10 of invert. The inverted arch longitudinal drainage blind pipe 10 is connected with the central drainage ditch 8 through a vertical blind pipe 12, and a detachable and threshold-adjustable pressure release valve 13 is arranged at the upper end of the vertical blind pipe 12. When the water pressure reaches the threshold value of 0.5Mpa, the pressure release valve 13 automatically opens to discharge the underground water into the central drainage ditch in the tunnel invert filling surface 01.
As shown in fig. 5, the waterproof roll 3 includes a circumferential waterproof roll 3-1 and a longitudinal waterproof roll 3-2, and the circumferential waterproof roll 3-1 and the longitudinal waterproof roll 3-2 are arranged in a cross-lapping manner to form a waterproof sealing area. Specifically, set up the wide two-sided self-adhesive formula hoop waterproofing membrane 3-1 of 0.5m apart from tunnel hoop construction joint 1m department arch wall scope hoop, set up the vertical waterproofing membrane 3-2 of the wide two-sided self-adhesive formula of 0.5m along tunnel vertical apart from vertical construction joint 0.5m department simultaneously, hoop waterproofing membrane 3-1 and vertical waterproofing membrane 3-2 alternately overlap joint setting, and overlap joint length is not less than 0.2m.
As shown in fig. 6, an annular drainage plate 4 is arranged in a waterproof sealing area surrounded by waterproof coiled materials on the tunnel arch wall, the arch foot longitudinal drainage blind pipe 5 is positioned in the waterproof sealing area, and the longitudinal distance between two adjacent annular drainage plates 4 is consistent with the distance between annular construction joints. The arch springing longitudinal drainage blind pipe 5 is arranged in a subsection mode, an opening is formed in the upper portion of the arch springing longitudinal drainage blind pipe 5, the length of each section is 9m, two ends of the arch springing longitudinal drainage blind pipe 5 of each section are connected with 90-degree elbows, and the arch springing longitudinal drainage blind pipe 5 is led into a side ditch.
In the watertight seal, a flashing connecting strip 16 connected to the flashing 2 surrounds the longitudinal flashing blind pipe 5 of the arch foot, as shown in fig. 3.
A construction method of a sea tunnel full-wrap waterproof threshold pressure-relief waterproof and drainage system comprises the following steps:
firstly, grouting the stratum, excavating the tunnel cavern and carrying out primary support operation to form an anchor-shotcreting primary support layer.
Specifically, a circular tunnel having an outer diameter of 14.68m is taken as an example. Before excavation, the permeability of surrounding rock is reduced by grouting the stratum, then the tunnel cavern is excavated, reasonable subsection excavation procedures and anchor rod (anchor cable and the like) support measures are selected, and the arch part and the side wall of the tunnel cavern are sprayed with C35 high-performance concrete to form an initial support layer of anchor spraying.
And secondly, after the surface of the primary support is leveled, the geotextile is firstly applied, the waterproof boards 2 are applied to the tunnel arch wall and the inverted arch in the whole ring, and the arch wall waterproof boards and the inverted arch waterproof boards are hermetically welded at arch foot positions.
Specifically, the waterproof board 2 should be laid while ensuring a smooth excavation surface. When the blasting and cleaning effects are difficult to meet the requirements, a cement mortar leveling layer with the thickness of 5cm-10cm is arranged by combining the inverted arch overexcavation condition, so that the waterproof board is prevented from being punctured.
And thirdly, applying a double-sided self-adhesive waterproof coiled material 3 on the inner surface of the waterproof board 2 to form a waterproof isolation area between adjacent construction joints.
Specifically, a 0.5m wide double-sided self-adhesive annular waterproof roll 3-1 is arranged in the annular direction in the arch wall range at a position 14 meters away from the annular construction joint, a 0.5m wide double-sided self-adhesive longitudinal waterproof roll 3-2 is arranged in the longitudinal direction at a position 0.5m away from the longitudinal construction joint, one side of the waterproof roll 3 is bonded with the waterproof plate 2, and the other side of the waterproof roll is bonded with the secondary lining 02. The circumferential waterproof coiled material 3-1 and the longitudinal waterproof coiled material 3-2 are in cross lap joint, and the lap joint length is not less than 0.2m, so that a waterproof sealing area is formed. An arch wall range independent partition water prevention and drainage system taking the length of each trolley as a unit is formed, and the subsequent local position is convenient to position and rectify after water leakage diseases occur.
Fourthly, arranging an annular drainage plate 4 and two arch foot longitudinal drainage blind pipes 5 in the range of the sealing area of the waterproof plate of the arch wall, and leading underground water into an inner ditch of the tunnel through the arch foot longitudinal drainage blind pipes 5 after the waterproof plate fails in sealing.
Specifically, a ring longitudinal blind pipe guide and drainage system is laid on the waterproof layer and comprises a ring-shaped concave-convex drainage plate and 80mm DG anti-crystallization arch foot longitudinal drainage blind pipes 5, the ring-shaped concave-convex drainage plate is laid at intervals along an arch wall, and the arch foot longitudinal drainage blind pipes 5 are laid between the bottoms of two side walls.
Wherein, the longitudinal distance between adjacent 0.5m wide convex shell type drainage plates is 12m, which is consistent with the distance between annular construction joints. The arch foot longitudinal drainage blind pipe 5 is arranged in sections, the upper part of the arch foot longitudinal drainage blind pipe is provided with an opening, the length of each section is 9m, and two ends of the arch foot longitudinal drainage blind pipe are provided with 90-degree elbows which are led into side ditches.
And fifthly, arranging an annular drainage blind pipe 9 and an inverted arch longitudinal drainage blind pipe 10 between every two annular construction joints outside the tunnel inverted arch range waterproof plate, and connecting the two through a four-way pipe 11. The inverted arch longitudinal drainage blind pipe 10 is communicated with the central drainage ditch 8 through a vertical blind pipe 12, a detachable and adjustable threshold pressure release valve 13 is arranged at the end of the vertical blind pipe 12, and the product model of the pressure release valve 13 is an A41H spring type pressure release valve.
Specifically, an inverted arch longitudinal drainage blind pipe 10 with the inner diameter of 80mmDG and an annular drainage blind pipe 9 are arranged between a waterproof plate in the middle of each plate trolley and an inverted arch lining, an adjustable threshold pressure release valve 13 is arranged in a central ditch (low end) of each plate inverted arch, and the inverted arch longitudinal drainage blind pipe 10 is connected with an inverted arch vertical drainage blind pipe 12 with the inner diameter of 80mmDG for preventing crystallization. When the water pressure reaches the threshold value of 0.5Mpa, the pressure release valve 13 is automatically opened to discharge the underground water into the central drainage ditch 8 in the hole, and the effect of reducing the water pressure of the surrounding rock is achieved while the underground water discharge is controlled.
And sixthly, after the quality of the waterproof and drainage system is checked to be qualified, pouring construction of a self-compaction waterproof concrete structure and a secondary lining structure is carried out, and a side ditch 7 and a central drainage ditch 8 are connected at the inverted arch filling part through a transverse drainage pipe 6 which is buried underground.
Specifically, the side gutters 7 are connected to the central gutter by means of transverse PVC drainage pipes with a spacing of 10m and an internal diameter of 100 mm. Particularly, the two-lining structure in the waterproof system is self-compacting high-performance waterproof concrete, compared with the conventional common waterproof concrete, the two-lining structure has high fluidity, compactness, durability, high anti-permeability performance and better waterproof performance, and can further improve the waterproof and drainage quality of the tunnel in the sea area.
The invention can be applied to the field of high-water-pressure sea area mine tunnels, and a plurality of waterproof layers are arranged in the whole ring of the tunnel, namely, the whole-wrapping waterproof is realized by adopting a grouting ring, an anti-permeability primary support, a whole-wrapping waterproof plate and a C50 high-grade anti-permeability concrete mold-building secondary lining, and the effective control of the water discharge amount in the tunnel is realized by the whole-wrapping waterproof concept; meanwhile, a pressure release valve is arranged at the inverted arch part, and the reduction of the water pressure at the periphery of the tunnel is realized through a threshold pressure release technology, so that the water displacement and the water pressure of surrounding rocks are balanced.
By applying the concept of 'prevention and drainage repetition and prevention and drainage combination', the back water pressure of the lining is controlled and reduced through the adjustable threshold pressure relief valve, the problem of overlarge water pressure of the full-blocking lining is avoided, and the problems of environment, resources and energy consumption of the full-drainage lining are also avoided.
Before excavation, the permeability of surrounding rocks is reduced by grouting the stratum, so that the inside of the surrounding rocks can be cemented and compacted, the impermeability of the surrounding rocks is enhanced, the formed surrounding rock protective ring layer plays a role in blocking a groundwater seepage passage, the gathering and seepage of groundwater to a tunnel region are reduced, and the water pressure outside the tunnel can be obviously reduced.
The waterproof layer taking the waterproof plate as the main body is arranged between the primary support and the secondary lining, so that the effect of isolation and lubrication is achieved, the surface of the concrete is prevented from being cracked due to additional stress such as temperature stress, shrinkage stress and the like in the hardening process of the secondary lining concrete, and the waterproof effect of the concrete is guaranteed.
The two-sided self-adhesive waterproofing membrane that sets up between waterproof board and the secondary lining cuts apart into one by one waterproof subregion with the tunnel, and the infiltration that passes the waterproof layer is in time discharged by the hoop drain bar, avoids the infiltration behind the secondary lining along tunnel vertical flow scurry and from weak link seepage such as construction joint to tunnel headroom.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a waterproof threshold pressure release drainage system is prevented in sea area tunnel complete package which characterized in that: comprises a waterproof system and a drainage system;
the waterproof system comprises geotextile, a waterproof board and a waterproof coiled material, wherein the geotextile and the waterproof board are sequentially arranged between a primary support and a secondary lining of the tunnel, and the waterproof coiled material is arranged between the waterproof board and the secondary lining;
drainage system includes the annular drain bar that sets up along tunnel radial cross section upper portion circumference, distributes in the vertical drainage blind pipe of hunch foot that the side wall bottom of tunnel both sides just set up along tunnel length direction, sets up in the side ditch of tunnel both sides side wall bottom and set up in the central escape canal that tunnel invert filling surface central point put, the vertical drainage blind pipe of hunch foot lets in the side ditch, the side ditch links to each other through horizontal drain pipe with the central escape canal.
2. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 1, which is characterized in that: this drainage system still including setting up in the annular drainage blind pipe of tunnel invert to and set up in the vertical drainage blind pipe of invert at tunnel invert center department, the annular drainage blind pipe passes through the four-way pipe with the vertical drainage blind pipe of invert and links to each other, the vertical drainage blind pipe of invert passes through vertical blind union coupling with central escape canal the upper portion end of vertical blind pipe is equipped with the relief valve.
3. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 1 or 2, which is characterized in that: the waterproof roll comprises a circumferential waterproof roll and a longitudinal waterproof roll, wherein the circumferential waterproof roll and the longitudinal waterproof roll are in cross lap joint to form a waterproof sealing area.
4. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 3, characterized in that: set up the hoop waterproofing membrane of 0.5m width in the arch wall hoop direction apart from tunnel hoop construction joint 1m, set up the wide vertical waterproofing membrane of 0.5m along tunnel longitudinal direction apart from vertical construction joint 0.5m department, hoop waterproofing membrane and vertical waterproofing membrane alternately overlap joint set up, and overlap joint length is not less than 0.2m.
5. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 3, characterized in that: the tunnel encircles all to be equipped with one annular drain bar in the waterproof sealing district that encloses by waterproofing membrane on the wall, the longitudinal drain pipe of hunch foot is located in the waterproof sealing district, the longitudinal separation of two adjacent annular drain bars is unanimous with the interval of hoop construction joint.
6. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 5, characterized in that: the arch foot longitudinal drainage blind pipe is arranged in a subsection mode, an opening is formed in the upper portion of the arch foot longitudinal drainage blind pipe, two ends of each arch foot longitudinal drainage blind pipe are connected with 90-degree elbows, and the arch foot longitudinal drainage blind pipe is led into the side ditch.
7. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 1, which is characterized in that: and when the water pressure reaches a threshold value of 0.5Mpa, the pressure release valve automatically opens to discharge the underground water into a central drainage ditch in the filling surface of the inverted arch of the tunnel.
8. The all-covered waterproof threshold pressure-relief water-proof and drainage system for the sea area tunnel according to claim 1, which is characterized in that: and an annular drainage blind pipe and an inverted arch longitudinal drainage blind pipe are arranged between every two annular construction joints outside the tunnel inverted arch range waterproof plate, and the annular drainage blind pipes and the inverted arch longitudinal drainage blind pipes are connected through a four-way pipe.
9. A construction method of a sea tunnel full-wrap waterproof threshold pressure-relief waterproof and drainage system is characterized by comprising the following steps:
firstly, grouting a stratum, excavating a tunnel cavern and carrying out primary support operation to form an anchor-shotcreting primary support layer;
secondly, after the leveling and facing of the primary support surface is carried out, geotextile is firstly applied, waterproof boards are applied to the tunnel arch wall and the inverted arch in a full-circle manner, and the waterproof boards of the arch wall and the inverted arch waterproof boards are hermetically welded at arch foot positions;
thirdly, applying double-sided self-adhesive waterproof coiled materials on the inner surface of the waterproof board to form a waterproof sealing area between adjacent construction joints;
fourthly, arranging an annular drainage plate and an arch foot longitudinal drainage blind pipe in the sealing area range of the waterproof plate of the arch wall, and introducing underground water into an inner side ditch of the tunnel through the arch foot longitudinal drainage blind pipe after the waterproof plate fails in sealing;
fifthly, arranging an annular drainage blind pipe and an inverted arch longitudinal drainage blind pipe between every two annular construction joints on the outer side of the tunnel inverted arch range waterproof plate, wherein the two annular drainage blind pipes are connected through a four-way pipe; the inverted arch longitudinal drainage blind pipe is communicated with the central drainage ditch through a vertical blind pipe, and the end of the vertical blind pipe is provided with a pressure release valve;
and sixthly, after the quality of the waterproof and drainage system is checked to be qualified, pouring construction of a self-compaction waterproof concrete structure and a secondary lining structure is carried out, and the inverted arch filling part is connected with the side ditch and the central drainage ditch by embedding the transverse drainage pipe.
10. The construction method of the sea area tunnel full-enclosed waterproof threshold pressure-relief water-proof and drainage system according to claim 9, characterized by comprising the following steps: in the fourth step, lay the vertical blind pipe drainage guide system of ring on the waterproof layer, the vertical blind pipe drainage guide system of ring is indulged including the unsmooth drain bar of hoop and the vertical drainage blind pipe of hunch foot, and the unsmooth drain bar of hoop is laid along the hunch wall interval, and the vertical drainage blind pipe of hunch foot lays between two side wall bottoms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211224493.8A CN115539127A (en) | 2022-09-29 | 2022-09-29 | Sea area tunnel full-wrapping waterproof threshold pressure-relief water-proof and drainage-proof system and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211224493.8A CN115539127A (en) | 2022-09-29 | 2022-09-29 | Sea area tunnel full-wrapping waterproof threshold pressure-relief water-proof and drainage-proof system and construction method |
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| CN118390578A (en) * | 2024-06-28 | 2024-07-26 | 中铁第六勘察设计院集团有限公司 | Waterproof and drainage system for underwater tunnel connection position |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118390578A (en) * | 2024-06-28 | 2024-07-26 | 中铁第六勘察设计院集团有限公司 | Waterproof and drainage system for underwater tunnel connection position |
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