CN114151130B - Tunnel construction method suitable for water-rich stratum - Google Patents
Tunnel construction method suitable for water-rich stratum Download PDFInfo
- Publication number
- CN114151130B CN114151130B CN202210033206.9A CN202210033206A CN114151130B CN 114151130 B CN114151130 B CN 114151130B CN 202210033206 A CN202210033206 A CN 202210033206A CN 114151130 B CN114151130 B CN 114151130B
- Authority
- CN
- China
- Prior art keywords
- water
- drainage
- tunnel
- channel steel
- water outlet
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 140
- 238000010276 construction Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000011435 rock Substances 0.000 claims abstract description 21
- 238000009412 basement excavation Methods 0.000 claims abstract description 8
- 239000011378 shotcrete Substances 0.000 claims description 12
- 239000004567 concrete Substances 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- E21D11/14—Lining predominantly with metal
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel diversion system suitable for a water-rich stratum and a construction method, wherein the tunnel diversion system comprises an annular channel steel structure which is arranged between two I-beams of an initial support and corresponds to the outline of a tunnel; the water outlets at the two ends of the annular channel steel structure are sequentially communicated with the central drainage ditch through the side wall water collecting well and the transverse buried groove. In the tunnel excavation process, the surrounding rock surface or the primary support surface is found to have strand-shaped water outlet, and a water outlet groove is formed between two I-beams before and after the concentrated water outlet point, and an annular channel steel structure is arranged in the water outlet groove for water discharge. The invention has simple construction, does not need pre-judging, expanding and digging, has strong universality, greatly improves the circumferential drainage capacity of the tunnel and the reliability of the drainage structure by utilizing the gap between two I-beams to embed the annular channel steel structure for drainage, can effectively meet the drainage requirement of the tunnel in the water-rich stratum, and has strong practicability.
Description
Technical Field
The invention relates to a tunnel diversion system and a construction method suitable for a water-rich stratum, belongs to the technical field of tunnel construction, and is particularly suitable for tunnel drainage structure construction of a water-rich section of surrounding rock.
Background
The surrounding rock water-rich section is often encountered in the tunnel construction process, if the treatment measures to the underground water are not in place during construction, adverse effects can be generated on the tunnel supporting structure, and hidden danger is further left for tunnel operation safety. Aiming at the condition that the tunnel passes through the water-rich section of the surrounding rock, the method is relatively reliable to conduct drainage treatment on the groundwater around the tunnel so as to reduce the water pressure acting on the tunnel structure and reduce the risk of tunnel leakage water in the later operation stage. However, the conventional tunnel water-proof and drainage system is limited in drainage capacity due to the pipe diameter of the drainage pipe, and is insufficient to cope with the situation of large-strand water outlet. Meanwhile, the radial rigidity of the annular drain pipe arranged between the primary support and the secondary lining is extremely limited, and the possibility of extrusion deformation or even rupture exists in the casting construction process of the secondary lining, so that the smoothness of a tunnel drainage system is seriously affected.
It can be seen that the existing tunnel water-proof and drainage system for guiding and draining underground water by utilizing the drainage pipe has certain limitation on functions, is insufficient for coping with surrounding rock water-rich passages for centralizing strand-shaped water outlet, and has certain construction risks and operation risks once underground water cannot be timely guided and drained. In view of the above, research on a tunnel diversion system and a construction method suitable for a water-rich stratum has become a problem to be solved urgently in the engineering community.
Disclosure of Invention
In view of the above, the present invention aims to provide a tunnel diversion system and a construction method suitable for water-rich stratum, which can overcome the defects of the prior art.
The invention aims at realizing the following technical scheme:
a tunnel diversion system suitable for water-rich stratum comprises an annular channel steel structure which is arranged between two primary support I-beams and corresponds to the outline of a tunnel; the water outlets at the two ends of the annular channel steel structure are sequentially communicated with the central drainage ditch through the side wall water collecting well and the transverse buried groove.
A plurality of radial or oblique drain holes communicated with the annular channel steel structure are arranged in the tunnel surrounding rock, and a drain channel is provided for the adjacent section; a full-ring perforated drain pipe is inserted into the drain hole to prevent the drain Kong Tanta from blocking the drain passage.
The annular channel steel structure comprises a plurality of channel steel units which are distributed along the whole range from a tunnel vault to an arch foot, the channel steel units are anchored on the primary support surface through anchor bolts, the adjacent channel steel units are welded with each other to form a closed annular channel structure, and a waterproof structure is arranged on the inner wall of the annular channel structure.
The channel steel units are of a trapezoid, rectangle, round or oval structure with a [ shape and an opening at the inner side; the two sides of the steel plate are provided with an enlarged steel backing plate with bolt holes, so that the channel steel units are fixed on the surface of the primary support through anchor bolts driven into the primary support; and the channel steel units at the bottom ends of the two sides are provided with water outlets which are connected with the side wall water collecting well.
The side wall water collecting well is arranged at the corner of the tunnel, the upper water inlet is communicated with the annular channel steel structure, and the lower water outlet is connected with the transverse buried groove; a filter residue steel wire mesh is arranged at the water outlet of the side wall water collecting well; an access hole is arranged on the outer side of the side wall water collecting well and above the tunnel cable trench, and an inspection door is arranged on the access hole.
The transverse buried groove is obliquely downwards arranged relative to the central drainage ditch, and the transverse gradient of the transverse buried groove is not less than 3%.
A tunnel construction method suitable for water-rich strata, comprising the steps of:
s1, observing the water outlet condition of surrounding rock in the tunnel excavation process, flexibly adjusting the tunnel construction procedure according to the water outlet condition of the surrounding rock of the tunnel,
if the primary support concrete is finished and the I-beams on two sides are erected in the tunnel excavation process, and the primary support concrete is not sprayed again, the surrounding rock surface is found to have strand-shaped water outlet, an oblique or radial drain hole is drilled at the water outlet position, a drain pipe is plugged into the hole, and then a space for discharging a drain groove is reserved between two I-beams before and after the concentrated water outlet point in the spray concrete re-spraying process, and the step S3 is directly carried out;
if the construction of the re-spraying primary support concrete is finished, and the water outlet of a certain primary support section is found to be serious, the step s2 is carried out;
s2, determining the deformation condition of the primary support and the residual reserved deformation through monitoring measurement, and determining the slitting depth of the primary support according to the residual reserved deformation;
a drain hole is drilled at the concentrated water outlet position, and the underground water is subjected to advanced pressure relief;
digging drainage grooves between two joist steel beams in front and behind a centralized water outlet point;
after the slotting is finished, a drain pipe is plugged into the drain hole;
s3, installing channel steel units in the drainage grooves until the assembly construction of the full annular channel steel structure is completed;
s4, adopting sprayed concrete to secondarily seal the outside of the annular channel steel structure;
s5, arranging a side wall water collecting well, a transverse buried groove and a central drainage ditch which are communicated with the water outlet at the lower end of the annular channel steel structure in sequence, and then carrying out inverted arch and inverted arch backfilling pouring construction in sequence;
and S6, paving geotextile and waterproof plates on the surface of the primary support, binding secondary lining steel bars, and pouring a secondary lining structure.
In the diversion method, the construction of the drainage groove and the construction of the tunnel primary support are alternately performed, namely, the drainage groove of the upper and middle steps is reserved or cut in the construction process of the upper and middle step primary support, a drainage hole is constructed, and the drainage groove of the lower step is reserved or cut in the construction process of the lower step primary support and the drainage hole is constructed; after the construction of the full-ring drainage groove is completed, the channel steel unit is installed at one time.
According to the diversion method, on the premise that the channel steel units arranged in the drainage grooves do not invade the secondary lining limit, the depth of the drainage grooves is reduced as much as possible, so that disturbance damage to the primary support structure is reduced; meanwhile, if the primary support is greatly deformed, a temporary circumferential support is additionally arranged on the influence section around the drainage groove to perform necessary reinforcement treatment.
The diversion method adopts a high-pressure water flushing method, static crushing, cutting and dismantling or any one of small-disturbance cutting modes to carry out drainage groove construction.
Compared with the prior art, the tunnel diversion system and the construction method suitable for the water-rich stratum disclosed by the invention comprise an annular channel steel structure which is arranged between two I-beams of the primary support and corresponds to the outline of a tunnel; the water outlets at the two ends of the annular channel steel structure are sequentially communicated with the central drainage ditch through the side wall water collecting well and the transverse buried groove. In the tunnel excavation process, primary shotcrete is completed, I-steel erection on two sides is completed, and when the primary shotcrete is not carried out again, strand-shaped water outlet is found on the surrounding rock surface, and a space for forming a drainage groove can be reserved between two I-steel beams before and after a concentrated water outlet point during the repeated spraying of sprayed concrete; if the construction of the re-spraying primary support concrete is finished, the serious water outlet of a certain primary support section is found, a drainage groove is dug between two I-beams before and after the concentrated water outlet point, finally, the assembly construction of an annular channel steel structure is carried out in the drainage groove, and large-strand water collected through drainage holes in the driving surrounding rock is led into the annular channel steel structure and then is collected into a central drainage ditch through a side wall water collecting well and a transverse buried groove. The invention has simple construction, does not need pre-judging, expanding and digging, has strong universality, greatly improves the circumferential drainage capacity of the tunnel and the reliability of the drainage structure by utilizing the gap between two I-beams to embed the annular channel steel structure for drainage, can effectively meet the drainage requirement of the tunnel in the water-rich stratum, and has strong practicability.
The beneficial effects of the invention are as follows:
(1) The drainage system has the advantages of simple structure, low construction cost, high structural reliability, strong arrangement flexibility, large drainage capacity and wide application range, and is particularly suitable for drainage of tunnels in water-rich strata, and has strong practicability;
(2) According to the tunnel annular channel steel structure, the drainage grooves are formed between the two I-beams, and then the drainage grooves are covered and sealed by the [ groove steel structure units ], so that a relatively sealed drainage channel can be formed, the size of the drainage channel is flexibly selected according to the water outlet condition, the clear distance between the I-beams, the primary support thickness and the reserved deformation amount, the drainage capacity of the channel is greatly improved compared with that of a conventional drainage pipe such as a circumferential drainage pipe, an omega-shaped semicircular drainage pipe and the like, the drainage channel is not easy to collapse, the structure reliability is high, and the condition of concentrated large-strand water outlet can be effectively treated;
(3) According to the invention, the drainage channel is arranged in the I-steel gap according to the water outlet position of the surrounding rock surface or the water outlet position of the primary support surface, the space occupancy rate is low, the arrangement flexibility is strong, the extrusion acting force born by the drainage channel in the secondary lining pouring construction process is small, the structural rigidity of the drainage channel is high, the risk of extrusion deformation of the drainage channel can be effectively avoided, and the reliability of a tunnel drainage system is greatly improved;
(4) According to the tunnel annular channel steel structure, the water outlet end of the tunnel annular channel steel structure is sequentially communicated with the side wall water collecting well, the transverse buried groove and the central drainage ditch, the side wall water collecting well is arranged at the corner of the tunnel side wall, the filter screen is additionally arranged at the water outlet position of the side wall water collecting well, large-discharge water is extremely easy to carry large-particle impurities, the filter screen is additionally arranged for filtering, so that the filtered water is discharged into the central drainage ditch through the transverse buried groove, the blockage of the drainage ditch is avoided, the blockage problem of the drainage pipeline can be effectively prevented, and the drainage performance is good. Meanwhile, the filtered large-particle impurities are deposited in the side wall water collecting well, and are removed through the inspection opening reserved at the side part of the side wall water collecting well, so that the operation is simple, and the time and the efficiency are high.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic cross-sectional view of a ring channel structure.
Fig. 3 is a schematic perspective view of a ring channel structure.
Fig. 4 is a schematic view of an arrangement structure of the drainage grooves on the primary support.
Fig. 5 is a schematic diagram of a connection structure of an annular channel steel structure and a side wall water collecting well.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
As shown in fig. 1-5, a tunnel diversion system suitable for water-rich stratum comprises an annular channel steel structure 3 which is arranged between two i-beams 101 of an primary support 1 and corresponds to the outline of a tunnel; the two ends of the annular channel steel structure 3 are provided with water outlets 301, and the water outlets 301 are communicated with the central drainage ditch 6 through the side wall water collecting well 4 and the transverse buried groove 5 in sequence.
A plurality of radial or oblique drain holes 7 communicated with the annular channel steel structure 3 are arranged in the surrounding rock of the tunnel. The radial or oblique drainage holes provide drainage channels for the adjacent sections, the drainage channels are flexibly arranged according to the water outlet positions of surrounding rocks, the specific number and positions of the drainage channels are determined according to the water outlet conditions of the subsequent primary support surfaces, the underground water of the adjacent sections is basically drained into the drainage holes, the radial or oblique drainage holes 7 can be internally inserted with full-ring perforated drainage pipes according to the needs, and therefore the drainage Kong Tanta can be prevented from blocking the drainage channels. The water outlet end of the drain pipe is communicated with the annular channel steel structure 3, so that the water rich in the surrounding rock can be drained into the annular channel steel structure 3 and is gathered into the central drainage ditch 6 through the side wall water collecting well 4 and the transverse buried groove 5.
The annular channel steel structure 3 comprises a plurality of channel steel units which are distributed along the whole range from a tunnel vault to an arch springing, the channel steel units are anchored on the surface of the primary support 1 through anchor bolts 302, adjacent channel steel units are mutually welded to form a closed annular flow channel structure, and a waterproof structure is arranged on the inner wall of the annular flow channel structure. The waterproof structure is a waterproof paint layer sprayed on the inner wall of the annular runner structure or a waterproof coiled material paved on the inner wall of the annular runner structure. Preferably, a sprayed waterproof paint layer is adopted, so that the construction is more convenient.
The channel steel units are of a trapezoid, rectangle, round or oval structure with a [ shape and an opening at the inner side; the two sides of the primary support 1 are provided with an enlarged steel backing plate 303 connected with the anchor bolts, so that the channel steel units are fixed on the surface of the primary support 1 through the anchor bolts 302 driven into the primary support 1; and the channel steel units at the bottom ends of the two sides are provided with water outlets 301, and the water outlets 301 are connected with the side wall water collecting well 4.
The side wall water collecting well 4 is arranged at the corner of the tunnel, the upper water inlet is communicated with the annular channel steel structure 3, and the lower water outlet is connected with the water inlet of the transverse buried groove 5; the filter residue steel wire mesh 8 is arranged at the water outlet of the side wall water collecting well 4 and is used as a device for filtering solid particles such as sediment, the central drainage ditch 6 is prevented from being blocked, and the filtered solid particles can be deposited in the side wall water collecting well 4 and cleaned up in the later period.
An access hole 401 is arranged on the outer side of the side wall water collecting well 4 and above the tunnel cable trench 9, an inspection door is arranged on the access hole 401, the inspection door is closed during normal operation, and the inspection door can be opened for relevant operation when inspection and slag removal are needed.
The transverse buried groove 5 is obliquely downwards arranged relative to the central drainage ditch 6, and the transverse gradient of the transverse buried groove is not less than 3 percent so as to effectively ensure the smoothness of drainage.
The diversion method based on the diversion system comprises the following steps:
s1, observing the water outlet condition of surrounding rock in the tunnel excavation process, flexibly adjusting the tunnel construction procedure according to the water outlet condition of the surrounding rock of the tunnel,
if the primary shotcrete is finished and the I-steel on two sides is erected in the tunnel excavation process, and the primary shotcrete is not carried out yet, the surrounding rock surface is found to have strand-shaped water outlet, an oblique or radial drainage hole 7 is punched at the water outlet position, a drainage pipe is plugged into the hole, and then a drainage groove space is reserved between two I-steels 101 before and after the concentrated water outlet point in the concrete shotcrete re-spraying process, and the step S3 is directly carried out;
if the construction of the re-spraying primary support concrete is finished, and the water outlet of a certain primary support section is found to be serious, the step s2 is carried out;
s2, determining the deformation condition of the primary support and the residual reserved deformation through monitoring measurement, and determining the slitting depth of the primary support according to the residual reserved deformation;
a drain hole is drilled at the concentrated water outlet position, and the underground water is subjected to advanced pressure relief;
digging drainage grooves between two I-beams 101 at the front and rear of the concentrated water outlet point;
after the slotting is finished, a perforated drain pipe is plugged into the drain hole, and the drain pipe is installed after the slotting is finished, so that the drain pipe can be prevented from being damaged by slotting construction;
s3, installing channel steel units in the drainage grooves until the assembly construction of the full annular channel steel structure 3 is completed;
s4, adopting sprayed concrete to secondarily seal the outer part of the annular channel steel structure 3;
s5, arranging a side wall water collecting well 4, a transverse buried groove 5 and a central drainage ditch 6 which are communicated with the annular channel steel structure 3 at a water outlet at the lower end of the annular channel steel structure in sequence, and then carrying out inverted arch and inverted arch backfilling pouring construction in sequence;
s6, paving geotextile and waterproof plates on the surface of the primary support 1, binding secondary lining steel bars, and pouring a secondary lining 2 structure.
In steps s1 and s2, the construction of the drainage groove and the construction of the tunnel primary support are alternately performed: firstly, reserving or cutting drainage grooves for constructing an upper step and a middle step in the primary support construction process of the upper step and the middle step, and constructing drainage holes; after the construction of the full-ring drainage groove is completed, the channel steel unit is installed at one time.
In step s2, on the premise that channel steel units arranged in the drainage grooves do not invade secondary lining limit, the depth of the drainage grooves is reduced as much as possible, so that disturbance damage to the primary support structure is reduced; meanwhile, if the primary support is greatly deformed, a temporary circumferential support is additionally arranged on the influence section around the drainage groove to perform necessary reinforcement treatment;
the drainage groove construction can be carried out by adopting a high-pressure water flushing method, static crushing, cutting and dismantling or any one of cutting modes with small disturbance.
In step s3, a waterproof paint layer is sprayed on the inner side of the channel steel unit in advance, and then adjacent channel steel units are welded and sealed in a welding mode, so that the annular channel steel structure 3 formed by splicing and assembling is guaranteed to have good waterproof performance and drainage capacity.
In step s4, when the outside of the annular channel steel structure 3 is secondarily sealed, the bottom ends of the two sides of the annular channel steel structure 3 are not sealed, and a water outlet communicated with the side wall water collecting well 4 is reserved.
In step s5, a water collecting well template is arranged on the side wall of the tunnel; erecting a transverse buried groove template and a central drainage ditch template on the top surface of the inverted arch of the tunnel, and then pouring the inverted arch structure and the secondary lining;
or, the side wall water collecting well 4 is erected in a template mode, the transverse buried groove 5 and the central drainage ditch 6 are installed in a concrete prefabricated member installation mode, and pouring construction of the inverted arch structure and the secondary lining structure is performed.
In the later operation stage, the inspection door can be opened as required, and the necessary maintenance operation can be performed through the inspection port 401.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variations and modification made to the above embodiment according to the technical matter of the present invention without departing from the technical scope of the present invention still fall within the scope of the technical scheme of the present invention.
Claims (8)
1. The tunnel construction method suitable for the water-rich stratum is characterized by comprising the following steps of:
s1, observing the water outlet condition of surrounding rock in the tunnel excavation process, flexibly adjusting the tunnel construction procedure according to the water outlet condition of the surrounding rock of the tunnel,
if the primary shotcrete is finished and the I-steel on two sides is erected in the tunnel excavation process, and the primary shotcrete is not carried out yet, the surrounding rock surface is found to have strand-shaped water outlet, an oblique or radial drainage hole (7) is punched at the water outlet position, a drainage pipe is plugged into the hole, and then a space for forming a drainage groove is reserved between two I-steel plates (101) before and after the concentrated water outlet point in the shotcrete re-spraying process, and the step S3 is directly carried out;
if the construction of the re-spraying primary support concrete is finished, and the water outlet of a certain primary support section is found to be serious, the step s2 is carried out;
s2, determining the deformation condition of the primary support section and the residual reserved deformation through monitoring measurement, and determining the slitting depth of the primary support according to the residual reserved deformation;
a drain hole is drilled at the concentrated water outlet position, and the underground water is subjected to advanced pressure relief;
digging drainage grooves between two I-beams (101) at the front and rear of the concentrated water outlet point;
after the slotting is finished, a drain pipe is plugged into the drain hole;
s3, installing channel steel units in the drainage grooves until the assembly construction of the full-annular channel steel structure (3) is completed;
s4, adopting sprayed concrete to secondarily seal the outside of the annular channel steel structure (3);
s5, arranging a side wall water collecting well (4), a transverse buried groove (5) and a central drainage ditch (6) which are communicated with the annular channel steel structure (3) at a water outlet at the lower end of the annular channel steel structure in sequence, and then carrying out inverted arch backfilling pouring construction in sequence;
s6, paving geotextile and waterproof plates on the surface of the primary support (1), binding secondary lining steel bars, and pouring a secondary lining (2) structure.
2. The tunnel construction method suitable for water-rich stratum according to claim 1, wherein: the construction of the drainage grooves and the construction of the tunnel primary support are alternately carried out, namely, the drainage grooves of the upper and middle steps are reserved or cut in the construction process of the upper and middle step primary support, drainage holes are constructed, and the drainage grooves of the lower step are reserved or cut in the construction process of the lower step primary support, and the drainage holes are constructed; after the construction of the full-ring drainage groove is completed, the channel steel unit is installed at one time.
3. The tunnel construction method suitable for water-rich stratum according to claim 2, wherein: on the premise that channel steel units arranged in the drainage grooves do not invade secondary lining limit, the depth of the drainage grooves is reduced as much as possible, so that disturbance damage to an initial supporting structure is reduced; meanwhile, if the primary support is greatly deformed, a temporary circumferential support is additionally arranged on the influence section around the drainage groove to perform necessary reinforcement treatment.
4. The tunnel construction method suitable for water-rich stratum according to claim 2, wherein: and the drainage groove construction is carried out by adopting a high-pressure water flushing method, static crushing, cutting and dismantling or any small-disturbance slitting mode.
5. The tunnel construction method suitable for water-rich stratum according to claim 1, wherein: the annular channel steel structure (3) comprises a plurality of channel steel units which are distributed along the whole range from a tunnel vault to an arch springing, the channel steel units are anchored on the primary support surface through anchor bolts, adjacent channel steel units are mutually welded to form a closed annular flow channel structure, and a waterproof structure is arranged on the inner wall of the annular flow channel structure.
6. The tunnel construction method suitable for water-rich stratum according to claim 5, wherein: the channel steel units are of a trapezoid, rectangle, round or oval structure with a [ shape and an opening at the inner side; the two sides of the steel support are provided with enlarged steel backing plates (303) with bolt holes, so that the channel steel units are fixed on the surface of the primary support through anchor bolts (302) driven into the primary support; and the channel steel units at the bottom ends of the two sides are provided with water outlets (301), and the water outlets (301) are connected with the side wall water collecting well (4).
7. The tunnel construction method suitable for water-rich stratum according to claim 1, wherein: the side wall water collecting well (4) is arranged at the corner of the side wall of the tunnel, the upper water inlet is communicated with the annular channel steel structure (3), and the lower water outlet is connected with the transverse buried groove (5); a filter residue steel wire mesh (8) is arranged at the water outlet of the side wall water collecting well (4); an access hole (401) is arranged on the outer side of the side wall water collecting well (4) and above the tunnel cable trench (9), and an inspection door is arranged on the access hole (401).
8. The tunnel construction method suitable for water-rich stratum according to claim 1, wherein: the transverse buried groove (5) is obliquely downwards arranged relative to the central drainage ditch (6), and the transverse gradient of the transverse buried groove is not less than 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210033206.9A CN114151130B (en) | 2022-01-12 | 2022-01-12 | Tunnel construction method suitable for water-rich stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210033206.9A CN114151130B (en) | 2022-01-12 | 2022-01-12 | Tunnel construction method suitable for water-rich stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114151130A CN114151130A (en) | 2022-03-08 |
| CN114151130B true CN114151130B (en) | 2024-04-12 |
Family
ID=80449869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210033206.9A Active CN114151130B (en) | 2022-01-12 | 2022-01-12 | Tunnel construction method suitable for water-rich stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151130B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010101062A (en) * | 2008-10-23 | 2010-05-06 | Ohbayashi Corp | Drainage structure of underground water, and construction method for tunnel equipped with the drainage structure |
| CN107131001A (en) * | 2017-06-28 | 2017-09-05 | 中铁第四勘察设计院集团有限公司 | A kind of and water delivery and the Railway Tunnel of communication function |
| CN109681271A (en) * | 2019-01-04 | 2019-04-26 | 交通运输部公路科学研究所 | A kind of built-in type tunnel ring direction drainpipe method for arranging |
| CN109751080A (en) * | 2019-01-15 | 2019-05-14 | 西南交通大学 | The supporting construction and construction method with guarded drainage function suitable for water rich strata |
| CN209212297U (en) * | 2018-08-27 | 2019-08-06 | 中南大学 | A kind of guarded drainage and decompression system for rich water section tunnel |
| CN110566273A (en) * | 2019-09-17 | 2019-12-13 | 中国十九冶集团有限公司 | Drainage system and drainage method for treating tunnel surrounding rock fracture water |
| CN113090325A (en) * | 2021-03-17 | 2021-07-09 | 中铁大桥勘测设计院集团有限公司 | Construction method for tunnel drainage ditch |
-
2022
- 2022-01-12 CN CN202210033206.9A patent/CN114151130B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010101062A (en) * | 2008-10-23 | 2010-05-06 | Ohbayashi Corp | Drainage structure of underground water, and construction method for tunnel equipped with the drainage structure |
| CN107131001A (en) * | 2017-06-28 | 2017-09-05 | 中铁第四勘察设计院集团有限公司 | A kind of and water delivery and the Railway Tunnel of communication function |
| CN209212297U (en) * | 2018-08-27 | 2019-08-06 | 中南大学 | A kind of guarded drainage and decompression system for rich water section tunnel |
| CN109681271A (en) * | 2019-01-04 | 2019-04-26 | 交通运输部公路科学研究所 | A kind of built-in type tunnel ring direction drainpipe method for arranging |
| CN109751080A (en) * | 2019-01-15 | 2019-05-14 | 西南交通大学 | The supporting construction and construction method with guarded drainage function suitable for water rich strata |
| CN110566273A (en) * | 2019-09-17 | 2019-12-13 | 中国十九冶集团有限公司 | Drainage system and drainage method for treating tunnel surrounding rock fracture water |
| CN113090325A (en) * | 2021-03-17 | 2021-07-09 | 中铁大桥勘测设计院集团有限公司 | Construction method for tunnel drainage ditch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114151130A (en) | 2022-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110566273B (en) | Drainage system and drainage method for treating tunnel surrounding rock fracture water | |
| CN110219313B (en) | Drainage system and construction method for underground construction blind well | |
| CN109371980B (en) | Deep foundation pit enclosure construction method combining spray anchor reverse construction and punched pile | |
| CN111119277B (en) | Method for connecting water intake pipeline in river by crossing cofferdam | |
| CN114151131B (en) | Tunnel construction method suitable for strong water-rich stratum | |
| CN114151130B (en) | Tunnel construction method suitable for water-rich stratum | |
| CN216446965U (en) | Tunnel drainage system embedded inside primary support | |
| CN110792085A (en) | Pipe-jacking working pit supporting method | |
| CN216950475U (en) | Tunnel annular flow guide system for centralized drainage of underground water | |
| CN110735641A (en) | Construction method of transfer passage of underpass pipeline | |
| CN116398165A (en) | New tunnel penetrating through existing station at zero distance and construction method thereof | |
| CN113863981B (en) | Water draining method for water-rich karst tunnel water burst | |
| CN214832581U (en) | Device for preventing concrete from flowing around during construction of underground garbage waste water partition underground diaphragm wall | |
| CN212318012U (en) | Lining structure for tunnel and tunnel | |
| CN114592892A (en) | Implementation method for pulling out anchor cable of shield tunnel in steel sleeve in soft soil area | |
| CN210637090U (en) | Tunnel water-proof and drainage system | |
| CN107090834A (en) | A kind of construction method of Fabricated Structure for Support of Excavation | |
| CN114293578A (en) | Basement drainage and water level monitoring system and construction method thereof | |
| JP2022130793A (en) | Drain cartridge for underground drain channel in land developed by banking, and forming method of underground drain channel in land developed by banking using the drain cartridge | |
| KR20150108342A (en) | Underground water drainage system of excavated ground and pipeline construction method using the same | |
| CN110645003A (en) | Completely weathered granite bias steep slope tunnel entry construction method | |
| CN114703874B (en) | Anti-slip slope structure of strip mine dumping site and construction method thereof | |
| CN113833524B (en) | Double-hole box culvert for treating karst area tunnel water burst and construction method thereof | |
| CN218813910U (en) | Basement upward floating device in prevention construction stage and pressure limiting device thereof | |
| CN219034746U (en) | Tunnel passing structure penetrating through water-rich karst cave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |