CN209742904U - Solidification structure suitable for rich water collapsible loess tunnel - Google Patents

Solidification structure suitable for rich water collapsible loess tunnel Download PDF

Info

Publication number
CN209742904U
CN209742904U CN201920396853.XU CN201920396853U CN209742904U CN 209742904 U CN209742904 U CN 209742904U CN 201920396853 U CN201920396853 U CN 201920396853U CN 209742904 U CN209742904 U CN 209742904U
Authority
CN
China
Prior art keywords
tunnel
holes
rich
water
collapsible loess
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.)
Expired - Fee Related
Application number
CN201920396853.XU
Other languages
Chinese (zh)
Inventor
王亮
孙宗阳
张德智
张先全
李晓雷
许刘晟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Second Engineering Bureau Co Ltd
Original Assignee
China Construction Second Engineering Bureau Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Construction Second Engineering Bureau Co Ltd filed Critical China Construction Second Engineering Bureau Co Ltd
Priority to CN201920396853.XU priority Critical patent/CN209742904U/en
Application granted granted Critical
Publication of CN209742904U publication Critical patent/CN209742904U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a solidification structure suitable for rich water collapsible loess tunnel. The solidification structure suitable for rich water collapsible loess tunnel includes that a plurality of vertical reinforcement district, the horizontal reinforcement district that horizontal drilling formed that form, vertical drilling formed, concrete layer, bed course, a plurality of stake hole, pour in a plurality of top grout body in the drilling, pour the horizontal grout body in a plurality of horizontal drilling, and pour the bottom grout body in a plurality of stake holes. Compared with the prior art, the utility model provides a solidification structure suitable for rich water collapsible loess tunnel adopts the integrated configuration form in vertical reinforcement district, level reinforcement district and stake hole to through actual environment, pour into different thick liquids into in it, in order to reach better solidification effect and stagnant water effect, construction maneuverability is high, rationally designed the pressure-relief vent, prolong its service life.

Description

Solidification structure suitable for rich water collapsible loess tunnel
Technical Field
The utility model relates to a tunnel machining technical field especially relates to a solidification structure suitable for rich water collapsible loess tunnel.
background
In the prior art, when a tunnel is constructed in a fault and water-rich quicksand section, in order to prevent water gushing and sand gushing of an excavation surface, a full-closed deep hole pre-grouting mode of the tunnel is generally adopted, namely, axial and radial grouting holes along the excavation contour line of the full section of the tunnel are excavated, then cement and water glass double-liquid slurry prepared according to a certain proportion is injected, the slurry permeates and spreads into the pores of a rock stratum or a sand layer and is quickly solidified, a concretion body with certain strength is formed by the slurry and surrounding broken rock blocks, a concretion water plugging curtain is formed at the periphery of the tunnel and the excavation surface, and a groundwater flow passage is cut off.
However, in the prior art, when construction is carried out in a fault and a water-rich area, due to the large flow of underground water, the grouting slurry is easy to discharge along with water flow according to a conventional grouting method, the slurry is difficult to retain, and the slurry waste and the grouting coagulation effect are poor. And the phenomenon of void after the primary support of the back after excavation can not be solved.
The existing solution, such as patent No. CN208106440, has a patent name of curing structure suitable for a water-rich collapsible loess tunnel, and the curing structure is only suitable for a tunnel with one closed end, but not for a tunnel with two open ends.
therefore, it is necessary to provide a new curing structure suitable for the water-rich collapsible loess tunnel to solve the above problems.
SUMMERY OF THE UTILITY MODEL
an object of the utility model is to provide a stagnant water, effectual solidification structure that is applicable to rich water collapsible loess tunnel of solidification.
The technical scheme of the utility model is that: a curing structure suitable for a water-rich collapsible loess tunnel includes:
the reinforcing area is formed by a plurality of vertical drilling holes, and the plurality of drilling holes are close to the middle from two sides;
The horizontal reinforcing area is horizontally arranged in the surrounding rock along the arch of the tunnel and is formed by a plurality of horizontal drilling holes;
The concrete layer is laid on the arched inner wall surface and the bottom surface of the tunnel;
The cushion layer is arranged below the concrete layer;
The pile holes vertically extend from the bedding layer to surrounding rocks of the tunnel, are distributed along the length direction of the tunnel, are of a gradient decreasing structure from the tunnel opening to the middle part, and are of a gradient increasing structure from the middle part of the tunnel to the tunnel opening on the other side;
the top grouting body is poured in the plurality of drill holes;
Horizontal grouting bodies are poured in the plurality of horizontal drill holes;
And pouring slurry at the bottom into the pile holes.
The vertical reinforcing area, the horizontal reinforcing area, the pile holes and the tunnel face are continuously constructed by pushing, corresponding slurry is injected into each hole at the same time, and water stopping and curing treatment is performed as soon as possible.
In order to achieve a good buffering effect, the tunnel portal is of a bevel cut structure, and the bevel cut is inclined towards the extending direction of the tunnel.
preferably, the inclined notch has an inclination angle of 40 ° to 60 °.
Preferably, a plurality of pressure reducing holes arranged along the length direction of the tunnel are further arranged on two sides of the inner wall surface of the tunnel.
Preferably, the spacing between the pressure relief holes is 400mm, and the size of the pressure relief holes is a rectangular structure with the length of 145mm × the height of 215 mm.
Preferably, the vertical bore is inclined to the length direction of the tunnel.
Preferably, the cushion layer is a pseudo-ginseng grey soil layer.
Compared with the prior art, the utility model provides a solidification structure suitable for rich water collapsible loess tunnel has following beneficial effect:
Firstly, a combined structure form of a vertical reinforcing area, a horizontal reinforcing area and a pile hole is adopted, and different slurry is injected into the pile hole through an actual environment, so that a better curing effect and a better water stopping effect are achieved;
And secondly, the construction operability is high, the pressure relief holes are reasonably designed, and the service life of the pressure relief holes is prolonged.
drawings
Fig. 1 is a schematic structural view of a cross section suitable for a water-rich collapsible loess tunnel provided by the present invention;
Fig. 2 is the utility model provides a longitudinal section's schematic structure diagram suitable for rich water collapsible loess tunnel.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
as shown in figures 1-2, the curing structure suitable for the water-rich collapsible loess tunnel comprises a vertical reinforcing area 1, a vertical drilling hole 2, a horizontal reinforcing area 3, a horizontal drilling hole 4, a concrete layer 5, a cushion layer 6, a pile hole 7 and a pressure reducing hole 8.
the number of the vertical reinforcing areas 1 is four, and the vertical reinforcing areas extend from the arch of the tunnel to the surrounding rock of the tunnel. The reinforced area is formed by a plurality of said vertical bores 2. The two sides of the vertical drilling holes 2 are close to the middle for inclined processing. And the vertical drilling 2 is inclined to the length direction of the tunnel.
And simultaneously, drilling and grouting are carried out, and top grouting body is injected into the vertical drilling hole 2. In order to prevent slurry from holding the drill rod in the grouting process, the drill rod is kept to rotate ceaselessly in the grouting process, and meanwhile, the top grouting body is made of low-strength slurry consisting of bentonite and cement to fill gaps between a drill hole and a hole wall so as to reduce the probability of holding the drill hole.
The horizontal bore 4 is formed progressively by the advancement of the face. The horizontal grouting bodies are uniformly distributed along the arch of the tunnel, holes are drilled in the surrounding rock from the tunnel face, and horizontal grouting bodies are filled in the holes, wherein the horizontal grouting bodies are grouting liquid formed by cement-water glass double-liquid slurry, so that a horizontal reinforcing area 3 is formed. Higher grouting pressure can be used to improve compaction and splitting effects. In order to improve the water stopping effect, superfine cement or solution can be injected into the mortar at intervals to enhance the water-only property of the soil body between the mortar veins.
A plurality of stake holes 7 are arranged at the bottom of the tunnel and along the length direction thereof. The program control method of the pile hole 7 adopts a hammering driven pile pipe hole forming method or a mechanical Luoyang shovel hole forming method. After the pile pipe is driven into the design for lifting, the pile pipe is pulled out for forming a hole. The pore-forming sequence is that the outer row is firstly arranged and then the inner row is arranged, and the inner row and the outer row are constructed by jumping pores at intervals.
In order to increase the water stopping effect, the pile hole 7 is of a gradient decreasing structure from the tunnel opening to the middle part, and then is of a gradient increasing structure from the middle part of the tunnel to the tunnel opening on the other side.
And injecting bottom grouting body into the pile hole 7, wherein the bottom grouting body is composed of cement, sand clay and materials in water 3. After the pile hole 7 is processed, a cushion layer 6 of pseudo-ginseng soil is paved on the pile hole.
And finally, spraying a concrete layer 5 on the cushion layer 6 and the inner wall surface of the tunnel arch structure. The sprayed concrete adopts a wet spraying process, so that the dust content in the air is reduced.
the tunnel portal is of a diagonal cut structure, the diagonal cut is inclined towards the extending direction of the tunnel, the inclination angle of the diagonal cut is 40-60 degrees, and the inclined cut can play a good buffering role by combining with the environmental requirements of the tunnel portal.
and a plurality of pressure reducing holes 8 which are arranged along the length direction of the tunnel are also arranged on two sides of the inner wall surface of the tunnel. The space between the pressure reducing holes 8 is 400mm, and the size of the pressure reducing holes 8 is a rectangular structure with the length of 145mm multiplied by the height of 215 mm.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a solidification structure suitable for rich water collapsible loess tunnel which characterized in that includes:
the reinforcing area is formed by a plurality of vertical drilling holes, and the plurality of drilling holes are close to the middle from two sides;
the horizontal reinforcing area is horizontally arranged in the surrounding rock along the arch of the tunnel and is formed by a plurality of horizontal drilling holes;
the concrete layer is laid on the arched inner wall surface and the bottom surface of the tunnel;
The cushion layer is arranged below the concrete layer;
The pile holes vertically extend from the bedding layer to surrounding rocks of the tunnel, are distributed along the length direction of the tunnel, are of a gradient decreasing structure from the tunnel opening to the middle part, and are of a gradient increasing structure from the middle part of the tunnel to the tunnel opening on the other side;
the top grouting body is poured in the vertical drill holes;
Horizontal grouting bodies are poured in the plurality of horizontal drill holes;
and pouring slurry at the bottom into the pile holes.
2. The curing structure for a water-rich collapsible loess tunnel according to claim 1, wherein the tunnel portal is a chamfered structure, the chamfered structure being inclined toward an extending direction of the tunnel.
3. The curing structure for the water-rich collapsed loess tunnel according to claim 2, wherein the slant angle of the slant cut is 40 ° to 60 °.
4. The curing structure for the water-rich collapsible loess tunnel according to claim 1, wherein a plurality of pressure-reducing holes are further formed in both sides of the inner wall surface of the tunnel in such a manner as to be arranged in the longitudinal direction of the tunnel.
5. The curing structure for the water-rich collapsible loess tunnel according to claim 4, wherein the pressure-reducing holes have a pitch of 400mm, and the size of the pressure-reducing holes is a rectangular structure having a length of 145mm by a height of 215 mm.
6. The curing structure for the water-rich collapsible loess tunnel according to claim 1, wherein the vertical drill holes are inclined in a length direction of the tunnel.
7. the curing structure for the water-rich collapsible loess tunnel according to claim 1, wherein the blanket is a pseudo-ginseng gray soil layer.
CN201920396853.XU 2019-03-26 2019-03-26 Solidification structure suitable for rich water collapsible loess tunnel Expired - Fee Related CN209742904U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920396853.XU CN209742904U (en) 2019-03-26 2019-03-26 Solidification structure suitable for rich water collapsible loess tunnel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920396853.XU CN209742904U (en) 2019-03-26 2019-03-26 Solidification structure suitable for rich water collapsible loess tunnel

Publications (1)

Publication Number Publication Date
CN209742904U true CN209742904U (en) 2019-12-06

Family

ID=68718488

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920396853.XU Expired - Fee Related CN209742904U (en) 2019-03-26 2019-03-26 Solidification structure suitable for rich water collapsible loess tunnel

Country Status (1)

Country Link
CN (1) CN209742904U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111764933A (en) * 2020-07-06 2020-10-13 高军 Construction method for rapid seepage-proofing consolidation grouting plugging of water-rich tunnel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111764933A (en) * 2020-07-06 2020-10-13 高军 Construction method for rapid seepage-proofing consolidation grouting plugging of water-rich tunnel
CN111764933B (en) * 2020-07-06 2021-10-15 高军 Construction method for rapid seepage-proofing consolidation grouting plugging of water-rich tunnel

Similar Documents

Publication Publication Date Title
CN104264688B (en) Manually digging hole non-uniform pile support construction process
CN105672348A (en) Construction method for cropping bridge pile foundation at sandy gravel stratum of abyssal region
CN103321244B (en) Sand foundation existing building sets up the construction method of basement
CN207109475U (en) It is close to mountain high-filled subgrade stabilization and Deformation control structure
CN107503257B (en) One kind being close to mountain high-filled subgrade stabilization and Deformation control structure and construction method
CN104328782A (en) Expansive pouring device and method for governing railway roadbed sedimentation and deformation
CN104612143A (en) Bored composite pile structure under karst cave/soil cave geological condition
CN103898916A (en) Mini-pile combined support structure and construction method thereof
CN106337413A (en) Water-draining stiff geo-textile bag cement-soil composite pile and construction method thereof
CN104532714A (en) Roadbed structure for treating deep soft soil karst foundation
CN206070508U (en) A kind of device of foundation
CN209742904U (en) Solidification structure suitable for rich water collapsible loess tunnel
CN102839683B (en) Granular pile-permeable concrete stake dual compound foundation and processing method
CN104790412B (en) Big width foundation pit supporting construction in the case of artesian water
CN104074197A (en) Large-diameter thin-walled tubular pile composite anchor rod type foundation pit support structure and construction method thereof
JP2015183364A (en) Method for preventing soil structure from sliding at slope surface layer with geocell fixing operation auxiliary means
CN204311456U (en) Foundation ditch strengthening structure
CN203866852U (en) Anti-floating pile structure composited by deep spiral-spraying cement soil plate and anchor rod
CN207211176U (en) A kind of big open caisson of superelevation
CN206752454U (en) One kind perfusion embedded pile
CN212837843U (en) IV-class and V-class surrounding rock tunnel concrete lining anti-cracking structure
CN212642730U (en) Collapsible loess area tunnel passes people's air defense structure
CN104712341B (en) Bed shallow covering shield driving stratum consolidation system and its construction method
CN112761166A (en) Construction method for shallow foundation pit of combined support of piles and pre-grouting steel pipes based on SMW (soil mixing wall) construction method
CN207647514U (en) A kind of shield tunnel vertical shaft end bracing means

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191206

Termination date: 20210326