CN107387126B - Tube shed structure of collapse integrated tunnel and construction method of collapse integrated tunnel - Google Patents
Tube shed structure of collapse integrated tunnel and construction method of collapse integrated tunnel Download PDFInfo
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- CN107387126B CN107387126B CN201710804203.XA CN201710804203A CN107387126B CN 107387126 B CN107387126 B CN 107387126B CN 201710804203 A CN201710804203 A CN 201710804203A CN 107387126 B CN107387126 B CN 107387126B
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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
- E21D11/04—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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
Abstract
The invention relates to a tunnel construction technology, aims to solve the problem that the existing structure and construction method can not well realize bearing of a collapse integrated tunnel, and provides a collapse integrated tunnel pipe shed structure and a collapse integrated tunnel construction method. The pipe shed structure of the slough integrated tunnel comprises a guide wall, a guide pipe main body and a connecting body. The guide wall has a plurality of guide holes. The guide pipe corresponds each guiding hole, and guide pipe one end inserts and locates in collapsing slope integrated, and the other end and guide wall rigid coupling. The periphery of the guide pipe is provided with a plurality of grouting openings for realizing grouting into the collapse slope integrated body. And, the outside of the collapse integrated body is provided with two rows of columnar earth surface grouting bodies, and the bottom is provided with columnar hole grouting bodies distributed radially, so that the collapse of the collapse integrated body is avoided, and the construction safety is ensured. The invention has the beneficial effects of strong bearing capacity and capability of realizing effective bearing of the upper collapse slope.
Description
Technical Field
The invention relates to a tunnel construction technology, in particular to a pipe shed structure of a slop integrated tunnel and a construction method of the slop integrated tunnel.
Background
Along with the rapid development of expressway industry in China, the construction range of the expressway is enlarged, the expressway gradually extends to mountain areas, and expressway tunnels in mountain areas are continuously increased due to the particularity and complexity of geological structures in mountain areas. Different terrain and geological conditions are encountered in the construction process, wherein tunnel entrance and exit construction under complex terrain conditions is very technical. Especially, when the soil body at the tunnel entrance is a slope collapse integrated body, the bearing requirement on the soil body is higher.
The existing structure and construction method can not well realize bearing of the collapse integrated, and the hidden danger of collapse of the collapse integrated in the construction process is large.
Disclosure of Invention
The invention aims to provide a pipe shed structure of a slop integrated tunnel, which solves the problems that the existing structure and construction method can not well realize bearing of the slop integrated, and the hidden danger of collapse of the slop integrated in the construction process is large.
Another object of the present invention is to provide a construction method of a slopped integrated tunnel.
Embodiments of the present invention are implemented as follows:
the embodiment of the invention provides a pipe shed structure of a sloughing integrated tunnel, which comprises a guide wall, a guide pipe main body and a connecting body. The guide wall is an arch structure matched with the section of the tunnel. The guide wall has a plurality of guide holes. The guide pipe corresponds each guiding hole, and guide pipe one end inserts and locates in collapsing slope integrated, and the other end is in corresponding guiding hole and with the guide wall rigid coupling. The periphery of the guide pipe is provided with a plurality of grouting openings. The adjacent guide pipes are provided with opposite grouting openings. The main body is made of cement slurry, and the main body is filled in each guide pipe. The main body extends out of the guide pipe from the grouting opening of the guide pipe where the main body is positioned to form a support body consisting of cement slurry. The struts extending from opposing grouting openings between adjacent guide tubes merge with one another to form a connector connecting adjacent bodies.
In one embodiment of the invention:
the guide pipe is provided with an exposed section exposed out of the guide wall, and the exposed section is provided with a positioning part corresponding to the grouting opening and positioned on the same bus of the guide pipe and used for indicating the position of the grouting opening.
In one embodiment of the invention:
two sides of the guide pipe are respectively provided with a row of grouting openings, the two rows of grouting openings are staggered with each other along the axial direction of the guide pipe, and one row of grouting openings are opposite to one row of grouting openings of the guide pipe.
In one embodiment of the invention:
the guide pipe is provided with two guide edges which are formed by bending inwards along the chord direction from the edge of the grouting opening, and the two guide edges jointly define the splayed grouting opening with the large inner part and the small outer part.
In one embodiment of the invention:
the guide pipe and the guide hole are sealed and bonded by a sealing layer formed by bonding slurry.
In one embodiment of the invention:
one end of the guide tube is conical.
In one embodiment of the invention:
the outside of the slope-collapse integrated body at the tunnel entrance is provided with an outer protection body, the outer protection body comprises a plurality of columnar earth surface grouting bodies which are formed by grouting inwards from the outer surface of the slope-collapse integrated body and are used for bonding soil bodies in the slope-collapse integrated body, and a soil blocking protection layer which is connected to the outer surface of the slope-collapse integrated body and integrated with each columnar earth surface grouting body, and the soil blocking protection layer is a slurry layer which is sprayed on the outer surface of the slope-collapse integrated body and is covered and adhered on the outer surface of the slope-collapse integrated body.
In one embodiment of the invention:
the surface of the slope collapse integrated body at the tunnel entrance above the tunnel entrance is provided with a plurality of columnar hole grouting bodies which are formed by upward grouting and bond soil bodies in the slope collapse integrated body, and the columnar hole grouting bodies are radially distributed along the circumferential direction of the top supply of the tunnel.
In one embodiment of the invention:
the upper end surfaces of the soil-retaining protective layer and the guide wall are sealed and adhered.
The invention also provides a construction method of the slop integrated tunnel, which comprises the following steps:
the construction step of the pipe shed structure comprises the following steps: the pipe shed structures of the slough integrated tunnel are respectively arranged at the inlets at the two ends of the tunnel;
tunnel excavation: simultaneously excavating two ends of a tunnel until the two ends are communicated with each other;
wherein, the pipe canopy structure is established the step and is included:
pouring a guide wall outside the tunnel entrance, wherein the guide wall is provided with a guide hole;
inserting guide pipes from the guide holes, and enabling opposite grouting openings of adjacent guide pipes to be opposite to each other one by one;
closing a gap between the guide tube and the guide hole;
pumping water from the guide pipe, pumping the water from the grouting openings, mixing the water with the peripheral slope collapse integrated between the opposite grouting openings to form a flowable solid-liquid mixed state, and pumping part of the solid-liquid mixed state through the grouting openings of the guide pipe by using a pumping pump to ensure that the corresponding grouting openings are communicated;
grouting into the guide pipes until cement slurry between opposite grouting openings between adjacent guide pipes is integrated;
the cement slurry in the guide pipe is hardened to form main bodies, and the cement slurry flowing out from the opposite grouting openings and fused with the cement slurry is hardened to form connecting bodies connected between the adjacent main bodies, so that each connecting body, each main body and each guide pipe form a net-shaped supporting body together, and form a collapse-slope integrated tunnel pipe shed structure together with the guide wall.
In summary, the pipe shed structure of the collapse integrated tunnel in the embodiment of the invention can form an arched reticular bearing layer, has the beneficial effect of strong bearing capacity, can realize the effective bearing of the collapse area above, and avoids the influence of collapse of the collapse integrated in the tunnel excavation process on construction or accidents;
the construction method of the collapse integrated tunnel adopts the collapse integrated tunnel pipe shed structure to protect the tunnel entrance and then excavates, and has the beneficial effects of realizing effective bearing of the collapse area above and avoiding the influence of collapse of the collapse integrated tunnel on construction or accidents in the tunnel excavation process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pipe shed structure of a sloughed integrated tunnel in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a longitudinal cross-sectional view of the sloughed integrated tunnel pipe roof structure of FIG. 1 along the depth direction of the tunnel;
FIG. 4 is a view of the tunnel pipe shed structure of the slop integrated in the present embodiment;
FIG. 5 is a view showing the distribution of the column-shaped earth surface grouting body and the column-shaped intra-hole grouting body in FIG. 4 along the depth direction of the tunnel;
FIG. 6 is a distribution view of the columnar surface grouting body in the top view of FIG. 5;
fig. 7 is a flowchart of a construction method of a sloughed integrated tunnel in an embodiment of the present invention.
Icon: a 100-collapse integrated tunnel pipe shed structure; 10-a guide wall; 20-guiding tube; 21-an exposed section; 22-positioning part; 23-guiding edges; 30-a body; 30 a-support; a 40-linker; 50-sealing layers; k1-a guide hole; k2-grouting port; t0-sloughing integration; t1-columnar earth surface grouting body; t2-a soil-retaining protective layer; t3-exo-protector; t4-grouting body in the columnar hole.
Detailed Description
For the purpose of making 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 clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as 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 made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like in the description of the present invention, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.
Furthermore, the terms "horizontal," "vertical," and the like in the description of the present invention, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
FIG. 1 is a schematic diagram of a collapsible integrated tunnel pipe shed structure 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1; FIG. 3 is a longitudinal cross-sectional view of the slopped integrated tunnel pipe roof structure 100 of FIG. 1 along the depth direction of the tunnel; fig. 4 is a view of the tunnel pipe shed structure 100 of the present embodiment when it is disposed in the ramp integrated T0. Referring to fig. 1, 2, 3 and 4, the structure 100 of the collapsible integrated tunnel shed in the present embodiment includes a guide wall 10, a main body 30 of the guide tube 20 and a connecting body 40. The guide wall 10 has an arch structure matched with the tunnel cross section. The guide wall 10 has a plurality of guide holes K1. The guide tube 20 corresponds to each guide hole K1, one end of the guide tube 20 is inserted into the slop assembly T0, and the other end is matched in the corresponding guide hole K1 and fixedly connected with the guide wall 10. The guide tube 20 has a plurality of grouting openings K2 at its outer circumference. The adjacent guide pipes 20 have opposed grouting openings K2 therebetween. The main body 30 is made of cement slurry, and the main body 30 is filled in each guide pipe 20. The main body 30 extends outward from the guide pipe 20 from the grouting port K2 of the guide pipe 20 where it is located, and supports 30a made of cement slurry. The struts 30a extending from the opposite grouting ports K2 between the adjacent guide pipes 20 are fused with each other to form the connection body 40 connecting the adjacent main bodies 30. Alternatively, two sides of the guide tube 20 are respectively provided with a row of grouting openings K2, the two rows of grouting openings K2 are staggered with each other along the axial direction of the guide tube 20, and one row of grouting openings K2 is opposite to one row of grouting openings K2 of the guide tube 20. In order to prevent the slurry from leaking out of the gap between the guide hole K1 and the guide tube 20 during grouting, the guide tube 20 and the guide hole K1 are sealed and bonded by a sealing layer 50 made of adhesive slurry. The guide tube 20 in this embodiment is disposed at an elevation angle of 3 ° to 5 ° to improve the overall load bearing capacity of the guide tube 20.
According to the pipe shed structure 100 of the slop integrated tunnel in the embodiment of the invention, one end is fixedly connected with the guide wall 10, the other end is inserted into the slop integrated T0, and the other end is connected with the connecting body 40 of the main body 30 which is formed by cement slurry in the adjacent guide pipe 20 and is formed by hardening the injected cement slurry, so that an arched reticular bearing layer can be formed, the beneficial effect of strong bearing capacity is achieved, the effective bearing of the slop integrated T0 above can be realized, and the influence of the collapse of the slop integrated T0 on construction or accidents in the tunnel excavation process can be avoided.
In this embodiment, please refer to fig. 4, 5 and 6, the aforementioned collapse-slope integrated tunnel pipe shed structure 100 is disposed at the tunnel entrance, the tunnel entrance is located on the outer slope of the mountain outer slope collapse-slope integrated T0, and the tunnel outer section is generally connected with the viaduct. The outside of the slop integrated body T0 is provided with an outer protective body T3, the outer protective body T3 comprises a plurality of columnar earth surface grouting bodies T1 which are formed by grouting inwards from the outer surface of the slop integrated body T0 and are used for bonding soil bodies inside the slop integrated body T0, and soil-retaining protective layers T2 which are connected to the outer surface of the slop integrated body T0 and are integrated with the columnar earth surface grouting bodies T1, and the soil-retaining protective layers T2 are slurry layers which are sprayed on the outer surface of the slop integrated body T0 and are covered and bonded on the outer surface of the slop integrated body T0. The soil-blocking cover T2 is optionally sealed and adhered between the soil-blocking cover T2 and the upper end surface of the guide wall 10. By arranging the soil-retaining protection layer T2, on one hand, the covering protection of the outer surface of the slough integrated T0 is realized, the slough integrated T0 is avoided, and on the other hand, the slurry can be prevented from flowing out of the outer surface of the slough integrated T0 during grouting.
With continued reference to fig. 4, 5 and 6, the surface of the slope collapse integrated T0 at the tunnel entrance above the tunnel entrance is provided with a plurality of grouting bodies T4 in the columnar holes for bonding the soil body inside the slope collapse integrated T0 formed by upward grouting, and the grouting bodies T4 in the columnar holes are radially distributed along the circumferential direction of the top supply of the tunnel. To avoid slumping of the slumping integrated T0.
Referring to fig. 5 and 6 again, the columnar surface grouting bodies T1 in the present embodiment are distributed in two rows, and a plurality of columnar surface grouting bodies T1 are disposed in each row to ensure that sufficient gripping force is given to the sloughed integrated body T0. The grouting bodies T4 in the columnar holes are distributed radially to protect the lower part of the collapse-slope integrated body T0.
In this embodiment, the guide tube 20 is designed to facilitate the facing of the grouting hole K2 and the formation of the connector 40. For example, in one implementation method of the foregoing embodiment, the guide tube 20 has an exposed section 21 exposed outside the guide wall 10, and the exposed section 21 has a positioning portion 22 corresponding to the grouting opening K2 located on the same bus of the guide tube 20, for indicating the position of the grouting opening K2. By providing the positioning portion 22 in the exposed section 21, it is possible to easily adjust the position of the grouting hole K2 of each guide tube 20 when the guide tube 20 is inserted. In actual use, the positioning portions 22 of two adjacent guide pipes 20 can be opposite to each other, so that the corresponding grouting openings K2 can be opposite to each other, the distance between the grouting openings K2 is minimized, and the corresponding supports 30a can be easily connected to form the integrated connecting body 40. Alternatively, the guide tube 20 has two guide edges 23 formed by bending inward in the chord direction from the edge of the grouting opening K2 thereof, and the two guide edges 23 together define the grouting opening K2 of a splayed shape with a large inside and a small outside. The splayed grouting opening K2 with the large inner part and the small outer part ensures that the slurry is subjected to larger extrusion pressure at the outlet end in the grouting process, and the support body 30a can be contacted and fused into the connecting body 40 quickly and effectively. Alternatively, one end of the guide tube 20 is tapered to reduce resistance when the guide tube 20 is inserted.
In summary, in the tunnel shed structure 100 of the present embodiment, one end of the tunnel shed structure is fixedly connected to the guide wall 10, the other end of the tunnel shed structure is inserted into the slope collapse integrated T0, and the connecting body 40 formed by hardening the poured cement slurry and connected to the main body 30 in the adjacent guide pipe 20, which is also composed of cement slurry, can form an arched and netlike bearing layer, and has the beneficial effects of high bearing capacity, and can realize the effective bearing of the slope collapse integrated T0 above, so as to avoid the influence of the collapse of the slope collapse integrated T0 on the construction or accidents during the tunnel excavation.
The collapse integrated tunnel gate structure 100 in this embodiment is described in the following second embodiment.
Example two
Fig. 7 is a flowchart of a construction method of a sloughed integrated tunnel in a second embodiment of the present invention. Referring to fig. 7 (see other views in the first embodiment in combination), the present embodiment provides a construction method of a sloughed integrated tunnel, which includes the following steps: the pipe shed structures 100 of the slough integrated tunnel in the first embodiment are respectively arranged at the inlets of the two ends of the tunnel;
tunnel excavation: simultaneously excavating two ends of a tunnel until the two ends are communicated with each other;
the construction method of the pipe shed structure comprises the steps of pouring a guide wall 10 outside a tunnel inlet, wherein the guide wall 10 is provided with a guide hole K1;
inserting the guide pipes 20 from the guide holes K1, and enabling opposite grouting openings K2 of adjacent guide pipes 20 to be opposite to each other one by one;
closing the gap between the guide tube 20 and the guide hole K1;
pumping water from the guide pipe 20, pumping the water out of the grouting openings K2, mixing the water with the peripheral collapse slope integrated T0 between the opposite grouting openings K2 to form a flowable solid-liquid mixed state, and pumping part of the solid-liquid mixed state through the grouting openings K2 of the guide pipe 20 by using a pumping pump to ensure that the corresponding grouting openings K2 are communicated;
grouting into the guide pipes 20 until cement slurry between the opposite grouting openings K2 between the adjacent guide pipes 20 is integrated;
curing, the cement slurry in the guide pipes 20 is hardened to form the main bodies 30, and the cement slurry flowing out from the opposite grouting openings K2 and being fused is hardened to form the connecting bodies 40 connected between the adjacent main bodies 30, so that the connecting bodies 40, the main bodies 30 and the guide pipes 20 form a net-shaped supporting body together, and the supporting body forms the slope-collapse integrated tunnel pipe shed structure 100 together with the guide walls 10.
The construction method of the slop integrated tunnel in the embodiment firstly constructs the slop integrated tunnel pipe shed structure 100 in the first embodiment, protects the tunnel entrance through the slop integrated tunnel pipe shed structure 100, and then excavates, thereby having the beneficial effects of difficult collapse in the construction process and high safety.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The construction method of the slop integrated tunnel is characterized by comprising the following steps of:
the construction step of the pipe shed structure comprises the following steps: the inlets at two ends of the tunnel are respectively provided with a collapse integrated tunnel pipe shed structure;
tunnel excavation: simultaneously excavating two ends of a tunnel until the two ends are communicated with each other;
wherein, the pipe canopy structure is established the step and is included:
pouring a guide wall outside the tunnel entrance, wherein the guide wall is provided with a guide hole;
inserting guide pipes from the guide holes, and enabling opposite grouting openings of adjacent guide pipes to be opposite to each other one by one;
closing a gap between the guide tube and the guide hole;
pumping water from the guide pipe, pumping the water from the grouting openings, mixing the water with the peripheral slope collapse integrated between the opposite grouting openings to form a flowable solid-liquid mixed state, and pumping part of the solid-liquid mixed state through the grouting openings of the guide pipe by using a pumping pump to ensure that the corresponding grouting openings are communicated;
grouting into the guide pipes until cement slurry between opposite grouting openings between adjacent guide pipes is integrated;
curing, the cement slurry in the guide pipes is hardened to form main bodies, the cement slurry flowing out from opposite grouting openings and fusing with the main bodies is hardened to form connecting bodies connected between the adjacent main bodies, so that each connecting body, each main body and each guide pipe form a net-shaped supporting body together, and the supporting bodies and the guide walls form the pipe shed structure of the slough integrated tunnel together.
2. A pipe shed structure of a slop integrated tunnel for realizing the slop integrated tunnel construction method of claim 1, comprising:
the guide wall is of an arch structure matched with the section of the tunnel; the guide wall is provided with a plurality of guide holes;
one end of the guide pipe is inserted into the slop assembly, and the other end of the guide pipe is matched with the corresponding guide hole and fixedly connected with the guide wall; the periphery of the guide pipe is provided with a plurality of grouting openings; the opposite grouting openings are arranged between the adjacent guide pipes;
two sides of the guide pipe are respectively provided with a row of grouting openings, the two rows of grouting openings are staggered with each other along the axial direction of the guide pipe, and one row of grouting openings is opposite to one row of grouting openings of the opposite guide pipe one by one;
a body of cement slurry, the body being filled in each of the guide pipes; the main body extends out of the guide pipe from the grouting opening of the guide pipe where the main body is positioned to form a support body consisting of cement slurry; the supports extending from the opposed grouting openings between adjacent guide tubes are fused with each other to form a connecting body connecting the adjacent bodies.
3. The disintegrating integrated tunnel pipe roof structure according to claim 2, wherein:
the guide pipe is provided with an exposed section exposed out of the guide wall, and the exposed section is provided with a positioning part corresponding to the exposed section, wherein the grouting opening is positioned on the same bus of the guide pipe and used for indicating the position of the grouting opening.
4. The disintegrating integrated tunnel pipe roof structure according to claim 2, wherein:
the guide pipe is provided with two guide edges which are formed by bending inwards along the chord direction from the edge of the grouting opening of the guide pipe, and the two guide edges jointly define the splayed grouting opening with the large inner part and the small outer part.
5. The disintegrating integrated tunnel pipe roof structure according to claim 2, wherein:
the guide pipe and the guide hole are sealed and bonded through a sealing layer formed by bonding slurry.
6. The disintegrating integrated tunnel pipe roof structure according to claim 2, wherein:
one end of the guide tube is conical.
7. The disintegrating integrated tunnel pipe roof structure according to claim 2, wherein:
the outside of the slope collapse integrated body at the tunnel entrance is provided with an outer protection body, the outer protection body comprises a plurality of columnar earth surface grouting bodies which are formed by grouting inwards from the outer surface of the slope collapse integrated body and are used for bonding soil mass in the slope collapse integrated body, and a soil blocking protection layer which is connected to the outer surface of the slope collapse integrated body in a covering mode and integrated with each columnar earth surface grouting body, and the soil blocking protection layer is a slurry layer which is sprayed on the outer surface of the slope collapse integrated body and is covered and bonded on the outer surface of the slope collapse integrated body.
8. The sloughed integrated tunnel pipe roof structure of claim 7, wherein:
the surface of the slope collapse integrated body at the tunnel entrance above the tunnel entrance is provided with a plurality of columnar in-hole grouting bodies which are formed by upward grouting and are used for bonding soil bodies in the slope collapse integrated body, and the grouting bodies in the columnar holes are radially distributed along the circumferential direction of the top arch of the tunnel.
9. The sloughed integrated tunnel pipe roof structure of claim 8, wherein:
and the soil-retaining protective layer is sealed and adhered with the upper end surface of the guide wall.
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| CN109915170B (en) * | 2019-03-18 | 2020-06-09 | 中铁十八局集团有限公司 | Construction method for safe entry of rock-rolling high-steep-slope tunnel |
| CN112302039A (en) * | 2020-10-26 | 2021-02-02 | 中交路桥建设有限公司 | Tunnel portal shallow-buried slope collapse volume treatment construction method |
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