CN109653764B - Method for repairing tunnel water seepage flow whitening - Google Patents
Method for repairing tunnel water seepage flow whitening Download PDFInfo
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- CN109653764B CN109653764B CN201811537100.2A CN201811537100A CN109653764B CN 109653764 B CN109653764 B CN 109653764B CN 201811537100 A CN201811537100 A CN 201811537100A CN 109653764 B CN109653764 B CN 109653764B
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- water
- drainage
- seepage
- groove
- flow
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a method for repairing tunnel seepage flow, which comprises the following steps of a, utilizing a geological radar to cooperate with a corresponding frequency antenna to ascertain the quality conditions of a secondary lining and a primary support, determining the position and the flow range of the seepage flow, and marking the contour line and the paragraph of the seepage flow white part on the surface of the secondary lining; b. digging and chiseling a reinforced concrete well groove along the longitudinal drainage direction of the seepage flow white section to obtain a first dredging well; c. and d, checking whether the drainage is smooth or not in the water flow direction of the first dredging well, checking whether the disease condition of the large-area seepage flow white section is reduced or basically disappears after the lower pipe trench is dredged, and cleaning the surface of the tunnel lining and repairing cracks. The invention utilizes the method of dredging the drainage pipe ditch of the lower tunnel and guiding, draining and plugging the water seepage, treats the phenomenon of white water seepage under the conditions of large area, large water flow and high underground water level, and effectively solves the problems of safe structure, water drainage prevention and the like.
Description
Technical Field
The invention relates to a method for repairing tunnel water seepage flow whitening.
Background
With the rapid development of traffic in China, the mileage of various roads is continuously increased, and new construction works and various built tunnels are built. The quantity is increased year by year, various tunnel defects or defects affect the safety of tunnels, and the tunnel lining is generally permeable to water, particularly large-area water seepage, and water seepage defects under the conditions of large water flow and high underground water level are caused. When a new tunnel or a tunnel passing through camps is built, diseases such as cracking and water seepage of a secondary lining are caused due to various reasons, large-area water seepage occurs locally, and white substances appear, which are the phenomena of efflorescence after cement receives water and are commonly called as water seepage whitening. Large-area water seepage, large water flow and high underground water level influence the use safety, drainage and attractiveness of the tunnel, so that the traffic quality governing department and the standards require repair, the phenomenon of water seepage cannot occur, and the safety and the use durability of the repaired and reinforced structure are evaluated.
At present, most of repairs are only aimed at apparent crack plugging or grooving drainage repair, large surface layers are simply repaired for local large-area leakage water flow white diseases or defects, the key effect is not played on the whole tunnel structure stability and a waterproof system, and cracks and water seepage are possibly caused again or the edges of a groove belt are cracked and water seepage is possibly caused under operation vibration, so that the consequences such as later-stage support block falling, even support deformation and the like are caused.
In patent No. CN104033164A, a method for repairing the void and water seepage damage of an inner arch of a tunnel is disclosed, which has the main defects that the viscosity of high-strength foaming resin reaches 200 +/-65 Pa.s, the resin is completely cured after being injected for 5 minutes, the final strength is reached after 10 minutes, a 12mm small drill hole and a 3mm strip-shaped slotted hole are poor in grouting effect, and the strength of the high-strength foaming resin is small, so that the strength requirements of primary support of IV-level and V-level surrounding rock areas cannot be met; moreover, a large number of 12mm small drill holes and 3mm strip-shaped slotted holes damage the secondary lining and the waterproof layer, reduce the strength of the secondary lining and form artificial water seepage channels.
In patent number CN104895581A, a tunnel lining rapid repairing structure based on carbon fiber woven mesh and a repairing method thereof are disclosed, which have a certain effect on repairing leakage water of a lining with tunnel defects. The method has a certain effect on the treatment and repair of the defects of insufficient thickness of a tunnel lining protective layer and exposed rib diseases, but has three problems, namely firstly, when I-shaped steel is arranged in a slot, the reinforcing steel bars need to be cut off to influence the stress; secondly, the inner surface of the carbon fiber woven net is sprayed with a composite mortar layer with a certain thickness, so that the problem of boundary invasion exists; thirdly, the length of the self-advancing hollow grouting anchor rod is not less than 3.5m, and the original waterproof layer is damaged during construction to form a new water leakage point.
Disclosure of Invention
The invention aims to treat the water seepage white under the conditions of large area, large water flow and high underground water level, and effectively solves the problems of safe structure, water prevention and drainage and the like.
The invention is realized by the following modes:
a method for repairing the water flow whitening of a tunnel is characterized by comprising the following steps: the method comprises the following steps:
a. detecting the distribution of underground media and scanning invisible target bodies or underground interfaces by using a geological radar and matching radio waves with corresponding frequency antennas so as to determine the internal structural form or position, ascertain the quality conditions of secondary lining and primary support, determine the seepage flow white position and flow range, and mark the contour lines and sections of the seepage flow white part on the surface of the secondary lining;
b. surveying longitudinal drainage and transverse drainage of the tunnel, digging a reinforced concrete well groove with the height of 100cm, the length of 80cm ×, the width of 60cm and the wall thickness of 20cm along the longitudinal drainage direction of the seepage flow white section, connecting the reinforced concrete well groove with an original drainage pipe, and arranging a well cover to obtain a first dredging well;
c. checking whether drainage is smooth or not according to the water flow direction of the first dredging well, if not, cleaning forwards to dredge the drainage to a depth of 50cm, digging and chiseling a second dredging well at a position 50m in the longitudinal water flow direction until the drainage is smooth or contour lines and sections of seepage water flow white parts are checked;
d. and (4) after dredging the lower pipe ditch, checking whether the disease condition of the large-area water seepage flow white section is reduced or basically disappears, cleaning the surface of the tunnel lining and repairing cracks.
Furthermore, the contour lines and the sections of the seepage white parts exist in the reverse direction of the water flow of the first dredging well, whether the drainage is smooth is checked by the reverse direction of the water flow of the first dredging well, if the drainage is not smooth, the third dredging well is forwards cleaned and dredged by less than 50cm, and the third dredging well is dug and chiseled in the position 50m in the longitudinal water flow direction until the drainage is smooth or the contour lines and the sections of the seepage white parts are checked.
Further, if the water seepage white section disease condition still exists in the step d, drainage measures are adopted, and the method comprises the following steps:
e. digging a groove with the upper width of 8cm, the lower width of 11cm and the depth of 15cm or 20cm along the extension direction of the crack; the length of the groove is determined by the upward extension 10cm of the highest point of the crack and the extension of the bottom of the cable groove at the lowest point of the crack.
f. Removing the slag and floating dust in cracks and drill holes by using compressed air with the air pressure of more than 0.2 MPa; and cleaning and decontaminating the surface of the edge groove by using acetone, burying a 5cm PVC half drainage pipe in the groove, and filling cement mortar with quick setting, water resistance, strong adhesiveness and strong durability into the gap of the edge groove after the half drainage pipe is fixed.
g. When the strength of the waterproof cement mortar reaches the specification requirement, coating 1cm high and 2cm wide water-swelling waterproof paste on two sides of the groove at the position of 10cm depth of the groove, and ensuring that the concrete and the water-swelling waterproof paste are seamless; and filling the modified epoxy resin daub after the surface of the water-swelling water-stopping paste is completely hardened to be dry by touch.
h. Dredging the water collecting channel, and fixedly arranging a drain pipe at the lowest point of the crack to lead to the water collecting channel;
i. after the epoxy resin daub is dried, a layer of cement paint is smeared on the treated part.
Further, when the crack depth is larger than 20cm, the groove depth is 15cm, and when the crack depth is smaller than 20cm, the groove depth is 10 cm.
The invention has the beneficial effects that:
1. the method for dredging the drain pipe ditch of the lower tunnel and guiding, draining and plugging the water seepage is utilized to treat the phenomenon that the water seepage is white under the conditions of large area, large water flow and high underground water level, and effectively solves the problems of safe structure, water drainage prevention and the like.
2. The cutting groove can be used as a dredging well and can also be reserved as an inspection well, so that a tunnel water-proof and drainage system is smooth, the problem of water seepage and water whitening can be solved substantially for a long time, and water seepage is avoided after repair.
3. Through the cast-in-place dredging well of C30 self-compaction fine grain micro-expansion concrete, the well body and former backfill, side ditch, pavement layer and rock mass of tunnel form the whole of intensity, need not the vibration, and quick shaping, intensity satisfies the requirement.
4. And the secondary lining of the tunnel has beautiful appearance through secondary boundary repair.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
icon: 1-primary support, 2-secondary lining, 3-crack, 4-groove and 5-dredging well.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
a method for restoring seepage whitening comprises the following steps:
a. detecting the distribution of underground media and scanning invisible target bodies or underground interfaces by using a geological radar and matching radio waves with corresponding frequency antennas so as to determine the internal structural form or position, exploring the quality conditions of a secondary lining 2 and a primary support 1, determining the seepage flow position and flow range, and marking the contour lines and sections of the seepage flow white part on the surface of the secondary lining 2;
b. surveying longitudinal drainage and transverse drainage of the tunnel, digging a reinforced concrete well groove with the height of 100cm, the length of 80cm ×, the width of 60cm and the wall thickness of 20cm along the longitudinal drainage direction of the seepage flow white section, connecting the reinforced concrete well groove with an original drainage pipe, and arranging a well cover to obtain a first dredging well 5;
c. checking whether drainage is smooth or not in the water flow direction of the first dredging well 5, if not, cleaning forwards to dredge until the drainage is smooth and the drainage is not less than 50cm, digging and chiseling a second dredging well in the longitudinal water flow direction of 50m until the drainage is smooth or contour lines and sections of seepage water white parts are checked;
d. and (4) after dredging the lower pipe ditch, checking whether the disease condition of the large-area water seepage flow white section is reduced or basically disappears, cleaning the surface of the tunnel lining and repairing cracks.
Furthermore, the contour lines and the sections of the seepage white parts exist in the reverse direction of the water flow of the first dredging well 5, whether the drainage is smooth is checked by the reverse direction of the water flow of the first dredging well 5, if the drainage is not smooth, a third dredging well is excavated at a position 50m in the longitudinal water flow direction until the drainage is smooth or the contour lines and the sections of the seepage white parts are detected.
Example II,
The repairing method of the seepage whitening further comprises the following steps:
e. digging a groove 4 with the upper width of 8cm, the lower width of 11cm and the depth of 15cm or 20cm along the extending direction of the crack 3; the length of the groove 4 is determined by the upward extension 10cm of the highest point of the crack 3 and the extension of the bottom of the cable trench at the lowest point of the crack 3;
f. removing ash and floating dust in the crack 3 and the drill hole by using compressed air with the air pressure of more than 0.2 MPa; cleaning and decontaminating the surface of the edge groove 4 by using acetone, burying a 5cm PVC half drainage pipe in the groove 4, and filling cement mortar with quick setting, water resistance, strong adhesiveness and strong durability into the gap of the edge groove 4 after the half drainage pipe is fixed;
g. when the strength of the waterproof cement mortar reaches the specification requirement, coating 1cm high and 2cm wide water-swelling waterproof paste on two sides of the groove 4 at the position of 10cm depth of the groove 4, and ensuring that no gap exists between the concrete and the water-swelling waterproof paste; filling modified epoxy resin daub after the surface of the water-swelling water-stopping paste is completely hardened to be dry by touch;
h. dredging the water collecting channel to ensure smooth drainage and prevent water accumulation in the water collecting channel, and fixedly arranging a drainage pipe at the lowest point of the crack 3 to lead to the water collecting channel;
i. and after the epoxy resin daub is dried, coating a layer of cement paint on the treated part to beautify the internal environment of the tunnel.
Further, when the depth of the crack 3 is more than 20cm, the depth of the groove 4 is 15cm, and when the depth of the crack 3 is less than 20cm, the depth of the groove 4 is 10 cm.
The present invention employs TSP203 or TSP203A radar and antenna.
The modified epoxy resin daub adopted by the invention comprises the following components: the repair material consists of epoxy resin, curing agent and hard filler, and has high strength, high erosion resistance and high adhesion. The adhesive has excellent thixotropic property and good bonding property, is well matched with concrete, and is commonly used for repairing the defects of the concrete filled with the leakage stoppage and sealing.
The invention adopts self-compacting fine-grain micro-expansion concrete for pouring: the vibration is not needed, the self-sealing is realized, the strength is high, and the water bleeding and the delamination are avoided; the durability is good, the inorganic grouting material does not age, does not rust the reinforcing steel bar, and is durable and firm; the plump drought is strong, the slight expansion is realized, and the disease restoration is facilitated; firmly bonding with the original concrete on the side surface; the mortar is convenient to use, 8-12% of grouting agent is mixed into ordinary cement and No. 03-07 broken stone according to the weight percentage of cement: sand: crushing stone: the water is mixed into the micro-expansive concrete with the ratio of 1:1.94:3.16:0.48, and the micro-expansive concrete can be used, and the recommended mixing amount is based on experiments.
The invention takes care to restore the appearance decoration after the repair process. Under the condition that the reinforcing steel bar protective layer is not influenced, a polisher is adopted to polish 2 lines of the secondary lining within a certain effective range in time, and the appearance is guaranteed to meet the requirements.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method for repairing the water flow whitening of a tunnel is characterized by comprising the following steps: the method comprises the following steps:
a. detecting the distribution of underground media and scanning invisible target bodies or underground interfaces by using a geological radar and matching radio waves with corresponding frequency antennas so as to determine the internal structural form or position, detecting the quality conditions of a secondary lining (2) and a primary support (1), determining the seepage flow white position and flow range, and marking the contour lines and sections of the seepage flow white position on the surface of the secondary lining (2);
b. surveying the longitudinal drainage and the transverse drainage of the tunnel, digging a reinforced concrete well groove with the height of 100cm, the length of 80cm ×, the width of 60cm and the wall thickness of 20cm along the longitudinal drainage direction of the seepage flow white section, connecting the reinforced concrete well groove with an original drainage pipe, and arranging a well cover to obtain a first dredging well (5);
c. checking whether drainage is smooth or not in the water flow direction of the first dredging well (5), if not, cleaning forwards to dredge until the drainage is not less than 50cm, digging and chiseling a second dredging well in the longitudinal water flow direction of 50m until one of two states of checking drainage is smooth or exceeding a contour line and a section of a seepage white part is achieved;
d. after dredging the lower pipe ditch, checking whether the disease condition of the large-area water seepage flow white section is reduced or basically disappears, cleaning the surface of the tunnel lining and repairing cracks;
when the water seepage white section disease condition still exists in the step d, drainage measures are adopted, and the method further comprises the following steps:
e. digging a groove (4) with the upper width of 8cm, the lower width of 11cm and the depth of 15cm or 20cm along the extending direction of the crack (3); the length of the groove (4) is determined by the upward extension of 10cm from the highest point of the crack (3) and the extension of the bottom of the cable trench from the lowest point of the crack (3);
f. compressed air with the pressure of more than 0.2MPa is used for removing the cracks (3), ash and floating dust in the holes; cleaning and decontaminating the surface of the edge groove (4) by using acetone, burying a 5cm PVC half drainage pipe in the groove (4), and filling cement mortar with quick setting, water resistance, strong adhesiveness and strong durability into the gap of the edge groove (4) after the half drainage pipe is fixed;
g. when the strength of the waterproof cement mortar reaches the specification requirement, coating water-swelling waterproof paste with the height of 1cm and the width of 2cm on two sides of the groove (4) at the position of 10cm of the depth of the groove (4), and ensuring that no gap exists between the concrete and the water-swelling waterproof paste; filling modified epoxy resin daub after the surface of the water-swelling water-stopping paste is completely hardened to be dry by touch;
h. dredging a water collecting ditch, wherein a drain pipe is fixedly arranged at the lowest point of the crack (3) and leads to the water collecting ditch;
i. after the epoxy resin daub is dried, a layer of cement paint is smeared on the treated part.
2. The method for repairing the tunnel seepage flow whitening according to claim 1, characterized in that: the water flow of the first dredging well (5) is reversely provided with a contour line and a section of a seepage white part, whether water drainage is smooth is checked through the water flow of the first dredging well (5), if the water drainage is not smooth, a third dredging well is excavated in a position 50m in the longitudinal water flow direction until the water drainage is smooth or exceeds one of the contour line and the section of the seepage white part.
3. The method for repairing the tunnel seepage flow whitening according to claim 1, characterized in that: when the depth of the crack (3) is more than 20cm, the depth of the groove (4) is 15cm, and when the depth of the crack (3) is less than 20cm, the depth of the groove (4) is 10 cm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810930281 | 2018-08-15 | ||
| CN2018109302819 | 2018-08-15 |
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| CN112983499B (en) * | 2021-03-04 | 2023-02-03 | 南京康泰建筑灌浆科技有限公司 | Comprehensive radical treatment leaking stoppage reinforcing method for gaps of tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101672187B (en) * | 2009-08-13 | 2012-05-30 | 重庆市十八土鑫诚灌浆防水工程有限公司 | Anti-seepage water treatment method |
| CN104033164B (en) * | 2014-05-26 | 2016-07-06 | 江苏鼎泰工程材料有限公司 | Come to nothing and the harmful method repaired that seeps water to what encircle in tunnel |
| CN204703956U (en) * | 2015-06-15 | 2015-10-14 | 中交第一公路勘察设计研究院有限公司 | A kind of can the waterproof and water drainage system of comprehensive maintenance tunneling drain |
| CN104912574B (en) * | 2015-06-29 | 2017-12-05 | 中南大学 | A kind of tunnel-liner percolating water Treatment Methods |
| CN107435548A (en) * | 2017-07-17 | 2017-12-05 | 中铁隧道勘测设计院有限公司 | A kind of waterproof structure of shield tunnel segment seam and its construction method |
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Address after: 350008 Building 5, fuwanpian standard workshop, Jinshan industrial concentration area, No. 869, Panyu Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province Patentee after: Fujian Luhai Engineering Technology Co.,Ltd. Address before: 350000 workshop No.5, Fuwan area, Jinshan industrial concentration area, no.869, Panyu Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province Patentee before: FUJIAN LUHAI ENGINEERING INVESTIGATION & DESIGN CO.,LTD. |