CN105350988A - Tunnel base reinforcing method - Google Patents
Tunnel base reinforcing method Download PDFInfo
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- CN105350988A CN105350988A CN201510862218.2A CN201510862218A CN105350988A CN 105350988 A CN105350988 A CN 105350988A CN 201510862218 A CN201510862218 A CN 201510862218A CN 105350988 A CN105350988 A CN 105350988A
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Abstract
The invention discloses a tunnel base reinforcing method. The tunnel base reinforcing method comprises the following steps that 1, hole drilling is performed at the position where a damaged portion of a tunnel base is located until a concrete layer is penetrated through, and then fast-setting cement grout is filled in a hole (1) to fill a base hole and/or a broken portion and/or a frost boiling and mud pumping portion; 2, when the filled fast-setting cement grout is or basically is in an initial setting state, drilling is continuously performed to be deep into base rock (8), and then a drill pipe (2) is lift out; 3, a reinforcing rod (4) is inserted into the hole, and then a hydrophobic grouting material is filled in the hole. The tunnel base reinforcing method is short in construction cycle and also can achieve the better reinforcing effect on a tunnel base of which an underground water system is developed and the base layer thickness is large.
Description
Technical field
The present invention relates to constructing tunnel field, particularly, relate to a kind of Tunnel Base reinforcement means.
Background technology
Tunnel Base is the polycrystalline substance in tunnel, and this polycrystalline substance solid is firmly the most important condition ensureing track in tunnel or road surface kilter.Tunnel bottom is due to durability design of structure weakness, Drainage Design is unreasonable, construction technology defect, of poor quality, routine servicing maintenance is not in place, and tunnel bottom is subject to the vehicle nature of the aspect such as power, groundwater erosion and human factor effect repeatedly, substrate often occur cracking, damaged, sink, squeeze outside both sides and frost boiling, emit the phenomenons such as mud.
For Foundation Base in Railway Tunnel, sinking in various degree all appears in railway in operation (common, passenger-cargo and heavily loaded) tunnel bottom structure, squeeze outside ditch and substrate such as to be risen soil at the disease, causes track structure state deteriorating.As: mixed passenger and freight railway Lan Wu two wires Wuqiaoling tunnel, Xikang line Qinling Tunnel, guizhou-guangxi-line are determined non-fragment orbit in the tunnels such as dam, tunnel, Yin Dong slope, Sui-Yu Railway dragon and phoenix and were once occurred rhegma in various degree, there is disease of rising soil in part location Tunnel Base, brings numerous difficulty to the maintenance in later stage; The Qun Dynasty, north yellow heavy haul railway tunnel are under the Long-term Vibration percussion of heavy haul train, Base pond is more serious, wherein, all there is hanging sky, sink in various degree, the disease such as to rise soil in the Tunnel Bases such as tunnel, Datong-Qinhuangdao Railway agglomerate point, Jundu Shan Mountain, nine mountains, Jing Zhongshan such as the long Liangshan of north yellow line, fountain gulf and Zhang Jiaping.These diseases all can cause gauge deviation, rail and joint breaking.
Therefore, the disease of Tunnel Base causes adverse effect to the operation of tunnel line and the comfortableness of passenger, even jeopardizes traffic safety time serious.At present, mostly adopt conventional railway roadbed substrate slip casting for above-mentioned tunnel bottom disease, railway roadbed overhauls and railway roadbed substrate exchange filling formula processes.
Railway roadbed substrate slip casting method mainly adopts rig to hole downwards until the degree of depth of designing requirement, then inserts Grouting Pipe and carries out consolidation process in the mode of static pressure grouting to substrate.The method construction is simple, convenient, fast, effectively can improve the intensity on stratum, but consolidation effect is poor on the location that lithic drainage is grown.
Railway roadbed method of overhauling mainly adopts construction beam (as D type beam) to be maked somebody a mere figurehead by track structure, pneumatic pick is adopted to cut damaged concrete, then new concrete is poured into, this method workload is larger, repair comparatively slow (repairing apart from general about 5 ~ 6m), disturbance is comparatively large, affects the normal operation of vehicle, can cause huge economic loss.
The feature of railway roadbed substrate cushion is that construction is simple, but there is larger limitation in it, specifically, when the base layer thickness will of substrate is larger, change the amount of filling out also relatively large, and substrate slope excavation also to take corresponding supporting measure, from the words that economy and this two aspects of safety consider, adopt the method just to seem not too applicable to the tunnel that basal layer is darker, and the method is comparatively applicable to the tunnel that base clay layer depth is 2.0-5.0m.
For above consolidation process mode Problems existing, patent document CN103510532A discloses a kind of railway tunnel bottom defect treatment technology based on Fabricated Beam-Slab stake, adopts restained beam overhead wire, carries out cutting slotting at the construction location place of beam to bottom; Hole according to the position of stake; After imbedding preformed pile in the borehole, carry out cementing operations; After the intensity of preformed pile slurries reaches designing requirement, by prefabricated erection on stake, beam upper berth precast plate, recovers railway ballast and circuit.Although the method can accelerate the speed of application of Disease Treatment, in use or needs part excavates layer of concrete, and do not solve the poor problem of consolidation effect on location that lithic drainage grows.
Summary of the invention
The object of this invention is to provide a kind of Tunnel Base reinforcement means, short construction period, also can obtain good consolidation effect to underground aqueous development and the larger Tunnel Base of base layer thickness will.
To achieve these goals, the invention provides a kind of Tunnel Base reinforcement means, comprise the following steps:
Steps A, in the boring of Disease in Tunnel Base place, is drilled into and penetrates layer of concrete and stop, then in hole, pour into fast setting cement slurries, to fill substrate cavity and/or damaged portion and/or part of rising soil;
Step B, after poured into fast setting cement slurries are in or are substantially in initial set state, continues boring and gos deep into basement rock, then propose drilling rod;
Step C, inserts bracing piece in hole, then in hole, pours into hydrophobicity grouting agent.
Preferably, in described steps A, the outer wall of the drill bit used when holing has fin.
Preferably, described fin is arranged in the shape of a spiral.
Preferably, in described steps A, described fast setting cement slurries are poured into by the hollow cavity of drilling rod.
Preferably, in described steps A, described fast setting cement slurries are water glass cement paste or TGRM slurries.
Preferably, in described step C, described bracing piece is tendon.
Preferably, described tendon is formed by being fixed together by many indented barss.
Preferably, in described step C, described hydrophobicity grouting agent is macromolecule polyurethane grouting agent.
Preferably, multiple holes that described boring is formed afterwards are quincunx or square arrangement.
Preferably, described hole to be positioned at outside described track between adjacent sleeper.
Be with the difference of existing Tunnel Base reinforcement means, first Tunnel Base reinforcement means provided by the invention holes at Disease in Tunnel Base place, fast setting cement slurries are injected after penetrating layer of concrete, substrate cavity or damaged portion or part of rising soil can be filled, and underground water is arranged, after waiting for the initial set of fast setting cement slurries, continue boring and go deep into basement rock, again by bracing piece patchhole, and pour into hydrophobicity grouting agent, to fill not by part that fast setting cement slurries are filled, and underground water is arranged, bracing piece and hole wall are fixed together simultaneously, thus improve the stress performance of Tunnel Base, improve substrate-loading ability, prevent substrate from sinking.Because reinforcement means of the present invention does not need excavate substrate or take supporting measure, method and railway roadbed substrate cushion is overhauled relative to railway roadbed, construction period is shorter, and owing to being adopt boring and after fill water mud, the mode of filling hydrophobicity grouting agent is again reinforced, also good consolidation effect can be obtained to underground aqueous development and the larger Tunnel Base of base layer thickness will.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for manual, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the Tunnel Base hole structure schematic diagram of Tunnel Base reinforcement means of the present invention;
Fig. 2 is the enlarged drawing at A place in Fig. 1;
Fig. 3 is the structural representation of operable drill bit and drilling rod in Tunnel Base reinforcement means of the present invention;
Fig. 4 is the distribution of boreholes schematic diagram of Tunnel Base reinforcement means of the present invention;
Fig. 5 is the structural representation of the bracing piece of the use of Tunnel Base reinforcement means of the present invention;
Description of reference numerals
1 hole 2 drilling rod
21 hollow cavities 22 are in the milk mouth
3 drill bit 31 fins
4 bracing piece 5 indented barss
6 track 61 sleepers
7 layer of concrete 8 basement rock
9 disease districts
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the Tunnel Base that the noun of locality of use relates in the present invention as " upper and lower, left and right " typically refer to is up and down, and consistent with direction shown in accompanying drawing 1." inside and outside " refers to inside and outside the profile relative to each component itself.
First it should be noted that, the present invention aims to provide a kind of Tunnel Base reinforcement means, by pouring into fast setting cement slurries after the boring of Disease in Tunnel Base place, boring is continued after the initial set of fast setting cement slurries, insert bracing piece again and pour into hydrophobicity grouting agent, the stress performance of substrate can be improved while not excavating substrate, adapt to the reinforcing of the Tunnel Base that lithic drainage is grown and base layer thickness will is larger preferably.Within the scope of this technical conceive, Tunnel Base reinforcement means of the present invention is not limited to the specific detail structure shown in Fig. 1-5.
Suitably see Fig. 1-Fig. 2, in order to realize above-mentioned technical purpose of the present invention, the Tunnel Base reinforcement means of basic embodiment of the present invention can comprise the following steps:
Steps A, in the boring of Disease in Tunnel Base place, is drilled into and penetrates layer of concrete and stop, then in hole 1, pour into fast setting cement slurries, to fill substrate cavity and/or damaged portion and/or part of rising soil;
Step B, after poured into fast setting cement slurries are in or are substantially in initial set state, continues boring and gos deep into basement rock 8, then propose drilling rod 2;
Step C, inserts bracing piece 4 in hole, then in hole, pours into hydrophobicity grouting agent.
Tunnel Base reinforcement means provided by the invention is by injecting fast setting cement slurries, substrate cavity or damaged portion or part of rising soil can be filled, underground water is arranged, and by inserting bracing piece in hole, perfusion hydrophobicity grouting agent, can fill not by part that fast setting cement slurries are filled, underground water arranges by secondary, bracing piece and hole wall is fixed together simultaneously, thus can improve the stress performance of Tunnel Base, improve substrate-loading ability, prevent substrate from sinking.
Tunnel Base reinforcement means of the present invention is when constructing, and shown in figure 4, multiple holes 1 that described boring is formed afterwards are preferably in quincunx or square arrangement.By adopting the hole 1 in quincunx or square distribution, can ensure that the grouting agent poured into is uniformly distributed, and ensureing certain overlap.
When arranging boring, needing first according to nondestructive testing result, determining Base pond scope, then arrange boring.Shown in figure 1, Fig. 4, for the reinforcing of Foundation Base in Railway Tunnel, need to arrange boring in adjacent sleeper vacancy, the hole 1 of boring is between adjacent sleeper 61 and be positioned at outside described track 6.
In embodiments of the present invention, shown in figure 3, in the boring procedure of described steps A, the outer wall of the drill bit 3 used has fin 31.By arranging fin 31 on the outer wall of drill bit 3, can by the concrete inner wall plucking in the hole of brill in drilling process, thus the hydrophobicity grouting agent injected in subsequent step be combined closely, to improve the supporting capacity of Tunnel Base with concrete.Preferably, in order to make drill bit drilling process more smooth and easy, described fin is arranged in the shape of a spiral.
In the present invention, when pouring into fast setting cement slurries in hole, block hole in order to avoid fast setting cement slurries are attached on hole wall, in described rapid A, described fast setting cement slurries are poured into by the hollow cavity 21 of drilling rod 2.The described fast setting cement slurries wherein poured into can adopt water glass cement paste or TGRM slurries, and all kinds of superfine cement slurries.
In step C of the present invention, the bracing piece 4 of insertion can adopt the steel of various high strength or nonmetallic tubulose or rod-shaped material.In the present embodiment, described bracing piece 4 is preferably tendon.Reinforcing bar is common constructional materials, and by the form of tendon, can increase the contact area with hydrophobicity grouting agent, thus combine closely with grouting agent, improves the supporting capacity of Tunnel Base.Preferably, shown in figure 5, described tendon is formed by being fixed together by many indented barss 5, and the diameter of the indented bars 5 of employing can be 18-22mm.Adopt indented bars 5, the combination degree with grouting agent can be improved further.Wherein the fixed form of many reinforcing bars can adopt binding or welding, preferably adopts welding manner to connect in the present invention.
In the present invention, after insert bracing piece 4 in hole, the hydrophobicity grouting agent poured in hole is preferably macromolecule polyurethane grouting agent.The underground water of substrate can be arranged after in macromolecule polyurethane grouting agent injection hole, prevent substrate from rising soil, fill substrate cavity, improve the stress performance of polycrystalline substance, improve substrate-loading ability, prevent substrate from sinking.Meanwhile, macromolecule polyurethane grouting agent can the empty slag of consolidation (at rubble, bits that construction period is formed), improves the globality of substrate, prevents substrate from sinking.
When pouring into macromolecule polyurethane grouting agent, inserting two groups of material respectively by suction tube divides in bucket, under the effect of the pressure of grout pump generation, make macromolecule polyurethane grouting agent be pumped in filling gun, stratum is injected by filling gun, raw material infiltrates crack, and then fast reaction reaches the object of reinforcing.
In a kind of application specifically of the present invention, first outside Tunnel, φ 18 ~ φ 22 indented bars 5 of some certain lengths is welded to each other together, forms a branch of tendon; Then according to nondestructive testing result, determine Base pond scope, and adopt rig to arrange boring in adjacent sleeper 61 vacancy, the hole 1 bored is arranged in quincunx (with reference to left part in figure 4 Suo Shi) or square (with reference to right part in figure 4 Suo Shi), penetrate layer of concrete 7 stop when being drilled into, immediately by the grouting mouth 22 at drilling rod 2 top by solidifying hollow cavity 21 between slurries injection drill bit 3 and drilling rod 2 soon, fill base concrete and hang sky, fragmentation and the disease districts 9 such as part of rising soil; Hang sky, fragmentation until base concrete and coagulate soon after slurries stablize and be in initial set state in 30 minutes in part of rising soil, continuation boring is goed deep into basement rock 8 and is no less than 50cm, reacting cycle proposes drilling rod 2, and take out core, insert the tendon that welded subsequently, again drilling rod 2 and drill bit 3 are inserted certain depth in boring 1 (about the length of the bit 1/3); The nozzle of recycling filling gun is toward injection macromolecule polyurethane grouting agent in grouting mouth 22, base concrete is hung after sky, fragmentation and the disease districts 9 such as part of rising soil fill, same reacting cycle proposes drilling rod 2, and stablize after 10 minutes (intensity of filling slurries reaches 10MPa) until pouring material, recover railway roadbed.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a Tunnel Base reinforcement means, is characterized in that, comprises the following steps:
Steps A, in the boring of Disease in Tunnel Base place, is drilled into and penetrates layer of concrete and stop, then in hole (1), pour into fast setting cement slurries, to fill substrate cavity and/or damaged portion and/or part of rising soil;
Step B, after poured into fast setting cement slurries are in or are substantially in initial set state, continues boring and gos deep into basement rock (8), then propose drilling rod (2);
Step C, inserts bracing piece (4), then in hole, pours into hydrophobicity grouting agent in hole.
2. Tunnel Base reinforcement means according to claim 1, is characterized in that, in described steps A, the outer wall of the drill bit (3) used when holing has fin (31).
3. Tunnel Base reinforcement means according to claim 2, is characterized in that, described fin is arranged in the shape of a spiral.
4. Tunnel Base reinforcement means according to claim 1, is characterized in that, in described steps A, described fast setting cement slurries are poured into by the hollow cavity (21) of drilling rod (2).
5. Tunnel Base reinforcement means according to claim 1, is characterized in that, in described steps A, described fast setting cement slurries are water glass cement paste or TGRM slurries.
6. Tunnel Base reinforcement means according to claim 1, is characterized in that, in described step C, described bracing piece (4) is tendon.
7. Tunnel Base reinforcement means according to claim 6, is characterized in that, described tendon is formed by being fixed together by many indented barss (5).
8. Tunnel Base reinforcement means according to claim 1, is characterized in that, in described step C, described hydrophobicity grouting agent is macromolecule polyurethane grouting agent.
9. Tunnel Base reinforcement means according to claim 1, is characterized in that, multiple holes (1) that described boring is formed afterwards are in quincunx or square arrangement.
10. Tunnel Base reinforcement means according to claim 9, is characterized in that, described hole (1) to be positioned between adjacent sleeper (61) and to be positioned at described track (6) outside.
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| CN201510862218.2A CN105350988B (en) | 2015-11-30 | 2015-11-30 | Tunnel Base reinforcement means |
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| CN201510862218.2A CN105350988B (en) | 2015-11-30 | 2015-11-30 | Tunnel Base reinforcement means |
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Cited By (6)
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| CN106640153A (en) * | 2017-01-05 | 2017-05-10 | 中铁工程设计咨询集团有限公司 | Treatment method for railway tunnel bedrock working face |
| CN109853519A (en) * | 2019-01-30 | 2019-06-07 | 山西三建集团有限公司 | The processing structure and processing method of ladder-like easy-weathering holystone layer substrate ground |
| CN111436204A (en) * | 2018-11-12 | 2020-07-21 | 包尔特殊基础工程有限公司 | Method for producing a sealing base in the ground |
| CN111472805A (en) * | 2019-09-10 | 2020-07-31 | 西南交通大学 | Method for reinforcing rich-water tillite layer tunnel substrate |
| CN113969536A (en) * | 2021-10-11 | 2022-01-25 | 陕西聚博德新材料科技有限公司 | Tunnel roadbed slurry-turning disease treatment method |
| CN114409367A (en) * | 2021-12-31 | 2022-04-29 | 山西省交通科技研发有限公司 | Preparation and application of water-mud-outburst tunnel high polymer composite grouting material |
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Cited By (7)
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| CN111472805A (en) * | 2019-09-10 | 2020-07-31 | 西南交通大学 | Method for reinforcing rich-water tillite layer tunnel substrate |
| CN113969536A (en) * | 2021-10-11 | 2022-01-25 | 陕西聚博德新材料科技有限公司 | Tunnel roadbed slurry-turning disease treatment method |
| CN114409367A (en) * | 2021-12-31 | 2022-04-29 | 山西省交通科技研发有限公司 | Preparation and application of water-mud-outburst tunnel high polymer composite grouting material |
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