CN206360708U - Cavern's shallow-layer landslide supporting construction under unfavorable geological condition - Google Patents

Cavern's shallow-layer landslide supporting construction under unfavorable geological condition Download PDF

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Publication number
CN206360708U
CN206360708U CN201621461894.5U CN201621461894U CN206360708U CN 206360708 U CN206360708 U CN 206360708U CN 201621461894 U CN201621461894 U CN 201621461894U CN 206360708 U CN206360708 U CN 206360708U
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China
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cavern
landslide
layer
shallow
supporting construction
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CN201621461894.5U
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张运花
王栋良
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China Electric Power Construction Group Aviation Port Construction Co Ltd
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PowerChina Huadong Engineering Corp Ltd
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Abstract

The utility model is related to cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition.The purpose of this utility model is to provide cavern's shallow-layer landslide supporting construction under a kind of simple in construction, easy construction, safe and reliable unfavorable geological condition.The technical solution of the utility model is:Cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition, the landslide region arrangement of supporting construction correspondence cavern, it is characterised in that:Shield is sprayed in the landslide region has nanometer to imitate steel fiber reinforced concrete layer, and correspondence landslide region is in cavern provided with some steel arch-shelfs for being close to cavern excavation face arrangement.The utility model is applied to the shallow-layer landslide cavern support engineering of features as poor geologic condition and rich groundwater.

Description

Cavern's shallow-layer landslide supporting construction under unfavorable geological condition
Technical field
The utility model is related to cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition.Suitable for features as poor geologic condition And the shallow-layer landslide cavern support engineering of rich groundwater.
Background technology
During for rich groundwater and ROCK CONDITIONS poor geology section progress cavern excavation, cavern crown position country rock is steady Qualitative poor, especially under percolating water effect, country rock is met after water softening, and rock strength reduction easily causes landslide.For bad The shallow-layer landslide of cavern under geological conditions, if dealing with improperly, it will cause the expansion of landslide scope, jeopardize the peace of whole cavern Entirely.
The content of the invention
The technical problems to be solved in the utility model is:For above-mentioned problem, there is provided a kind of simple in construction, construction Cavern's shallow-layer landslide supporting construction under convenient, safe and reliable unfavorable geological condition.
The technical scheme that the utility model is used is:Cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition, The landslide region arrangement of supporting construction correspondence cavern, it is characterised in that:Shield is sprayed in the landslide region has nanometer to imitate steel fibre Concrete layer, correspondence landslide region is in cavern provided with some steel arch-shelfs for being close to cavern excavation face arrangement.
The nanometer imitates steel fiber reinforced concrete layer lower section and is provided with bracing members, and bracing members one end is fixedly welded on the described of lower section On steel arch-shelf, the other end connects the nanometer and imitates steel fiber reinforced concrete layer;
Nanometer imitates steel fiber reinforced concrete layer lower section placing concrete to the excavation face of cavern in the landslide region.
The nanometer, which imitates steel fiber reinforced concrete layer bottom surface place mat, steel plate, and the bracing members are supported on the steel plate.
The nanometer imitates 40~50cm of thickness of steel fiber reinforced concrete layer.
It is parallel with the tangent line of the steel arch-shelf below that the nanometer imitates steel fiber reinforced concrete layer bottom surface.
The nanometer is imitated steel fiber reinforced concrete layer bottom surface and flushed with the excavation face of cavern.
Spacing is 0.5~1.0m between the steel arch-shelf and steel arch-shelf.
The steel arch-shelf at least covers landslide region and both sides extension forwards, backwards is not less than 10m.
The beneficial effects of the utility model are:The utility model imitates the shape of steel fiber reinforced concrete combination steel arch-shelf using nanometer Formula carries out supporting to landslide region, and implementation is simple, practical, safe and reliable, work well.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment 1.
Fig. 2 is the structural representation of embodiment 2.
Embodiment
Embodiment 1:As shown in figure 1, the present embodiment is cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition, There is landslide region 2 in the excavation face 1 of cavern, and the landslide depth in landslide region is less than 0.5m.This example is sprayed in landslide region 2 Protect nanometer and imitate steel fiber reinforced concrete, the region spray shield that will disposably cave in forms the imitative steel fibre of nanometer to concordant with cavern excavation face 1 Concrete layer 3.The steel arch-shelf 4 in some adaptation cavern excavation faces 1 is arranged in correspondence landslide region 2 in cavern, and steel arch-shelf 4 at least covers Lid landslide position is simultaneously each extended over not less than 10m to both sides, and spacing is generally 0.5~1.0m between steel arch-shelf 4 and steel arch-shelf.
The imitative steel fiber reinforced concrete of nanometer has good engineering characteristic:
(1) infiltration, chip off-falling position, can quick closure country rock, reach water-stagnating effect, it is ensured that the engineering construction phase safety;
(2) its jetting thickness solves up to 40~50cm and repeatedly sprays problem again, and it is convenient to construct;
(3) rebound degree is smaller, and the rebound degree of crown is less than 8%, and the rebound degree of abutment wall is less than 5%, effective utilization of material Rate is high;
(4) rise strong fast, initial set and final setting time are short, and the compression strength after final set is increased substantially, the security of engineering Greatly improved with reliability.
The imitative proportion of steel fibrous-concrete of nanometer according to《Mix Design code》(JGJ55-2011) code such as Relevant regulations and requirement primarily determine that in proportioning, common engineering according to the match ratio of table 1 implement.
The imitative steel fibrous shotcrete match ratio of 1 nanometer of table
Spike Unit Quantity
Cement Kg/m3 451
Water consumption Kg/m3 159
Sand Kg/m3 1028
Meter Shi Kg/m3 686
Nanometer % 10
Accelerator % 7
Imitative steel fibre Kg/m3 5
Embodiment 2:As shown in Fig. 2 the present embodiment is cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition, There is landslide region 2 in the excavation face 1 of cavern, and the landslide depth in landslide region is more than 0.5m, less than 2.0m.This example is in landslide Spray shield nanometer in the top of region 2 imitates steel fiber reinforced concrete, and the nanometer for forming 40~50cm of thickness imitates steel fiber reinforced concrete layer 3.Nanometer is imitative 3 bottom surface of steel fiber reinforced concrete layer are parallel with the tangent plane of lower section excavation face 1, and nanometer, which imitates steel fiber reinforced concrete 3 bottom surface place mat of layer, one Block steel plate 7.The steel arch-shelf 4 in some adaptation cavern excavation faces 1 is arranged in correspondence landslide region 2 in cavern, and steel arch-shelf 4 is at least covered Landslide position is simultaneously each extended over not less than 10m to both sides, and the distance between two neighboring steel arch-shelf 4 is generally 0.5~1.0m.This It is connected in example in landslide region 2 between steel plate 7 and lower section steel arch-shelf 4 through bracing members 5, jail is welded in the one end of bracing members 5 with steel arch-shelf 4 Gu, the other end is acted on steel plate 7.
The imitative steel fiber reinforced concrete of nanometer has good engineering characteristic:
(1) infiltration, chip off-falling position, can quick closure country rock, reach water-stagnating effect, it is ensured that the engineering construction phase safety;
(2) its jetting thickness solves up to 40~50cm and repeatedly sprays problem again, and it is convenient to construct;
(3) rebound degree is smaller, and the rebound degree of crown is less than 8%, and the rebound degree of abutment wall is less than 5%, effective utilization of material Rate is high;
(4) rise strong fast, initial set and final setting time are short, and the compression strength after final set is increased substantially, the security of engineering Greatly improved with reliability.
The imitative proportion of steel fibrous-concrete of nanometer according to《Mix Design code》(JGJ55-2011) code such as Relevant regulations and requirement primarily determine that in proportioning, common engineering according to the match ratio of table 1 implement.
The imitative steel fibrous shotcrete match ratio of 1 nanometer of table
Spike Unit Quantity
Cement Kg/m3 451
Water consumption Kg/m3 159
Sand Kg/m3 1028
Meter Shi Kg/m3 686
Nanometer % 10
Accelerator % 7
Imitative steel fibre Kg/m3 5
The construction method of cavern's shallow-layer landslide supporting construction is as follows under unfavorable geological condition:
1st, structure lines are excavated:According to design requirement, carry out answering strict controlled blasting work in chamber blasting excavation, work progress Skill, it is ensured that the flatness of excavation face 1.
2nd, landslide region 2 judges:The geological conditions at situation and the position that caves in is disclosed according to cavern excavation, to landslide region 2 Judged, it is determined that the depth of landslide;For the shallow-layer landslide within 2m, typically according to actual conditions, according to landslide depth point Duan Zhili.
3rd, nanometer imitates steel fiber reinforced concrete spray shield:Thickness is protected in spray for the position that caves in, is generally implemented by following:
(1) when landslide depth<During 0.5m, disposably the spray of landslide position is protected to concordant with design excavation face 1;
(2) 0.5m is worked as<Landslide depth<During 2.0m, 40~50cm of spray shield is thick at the top of landslide, it is ensured that the spray mask of formation with Bottom steel arch-shelf tangent line is parallel.
4th, steel arch-shelf 4 is set up:After the completion of nanometer imitates steel fiber reinforced concrete spray shield, steel arch-shelf 4, steel arch-shelf 4 are laid immediately Can be according to the rock mass condition Uniting of cavern;Generally steel arch-shelf 4 at least covers landslide position and prolonged respectively to both sides Stretch not less than 10m, the spacing of steel arch-shelf 4 is generally 0.5~1.0m.
5th, bracing members 5 are set up:Work as 0.5m<Landslide depth<During 2.0m, nanometer thick 40~50cm of landslide top spray shield imitates steel Fiber concrete, residual cavity position is connected using bracing members 5, the one end of bracing members 5 and the firm welding of steel arch-shelf 4, the other end with The nanometer of spray shield imitates steel fiber reinforced concrete connection, to ensure uniform force, and the bottom surface place mat one of steel fiber reinforced concrete 3 is imitated in nanometer Block steel plate 7, bracing members 5 are acted on steel plate.
6th, concrete 6 is poured:Work as 0.5m<Landslide depth<During 2.0m, nanometer thick 40~50cm of landslide top spray shield imitates steel Cavity is filled to concordant with design excavation face 1 by fiber concrete layer 3, residual cavity position placing concrete 6.

Claims (8)

1. cavern's shallow-layer landslide supporting construction under a kind of unfavorable geological condition, the landslide region (2) of supporting construction correspondence cavern Arrangement, it is characterised in that:Spray shield has nanometer to imitate steel fiber reinforced concrete layer (3), correspondence landslide region in the landslide region (2) (2) provided with some steel arch-shelfs (4) for being close to cavern excavation face (1) arrangement in cavern.
2. cavern's shallow-layer landslide supporting construction under unfavorable geological condition according to claim 1, it is characterised in that:It is described to receive Bracing members (5) are provided with below the imitative steel fiber reinforced concrete layer (3) of rice, bracing members (5) one end is fixedly welded on the steel arch of lower section On frame (4), the other end connects the nanometer and imitates steel fiber reinforced concrete layer (3);
The interior nanometer of the landslide region (2) imitates steel fiber reinforced concrete layer (3) lower section placing concrete (6) to the excavation face of cavern (1)。
3. cavern's shallow-layer landslide supporting construction under unfavorable geological condition according to claim 2, it is characterised in that:It is described to receive Imitative steel fiber reinforced concrete layer (3) bottom surface place mat of rice has steel plate (7), and the bracing members (5) are supported on the steel plate.
4. cavern's shallow-layer landslide supporting construction under unfavorable geological condition according to claim 2, it is characterised in that:It is described to receive 40~50cm of imitative steel fiber reinforced concrete layer (3) thickness of rice.
5. cavern's shallow-layer landslide supporting construction under the unfavorable geological condition according to Claims 2 or 3 or 4, it is characterised in that: It is parallel with the tangent line of the steel arch-shelf (4) below that the nanometer imitates steel fiber reinforced concrete layer (3) bottom surface.
6. cavern's shallow-layer landslide supporting construction under unfavorable geological condition according to claim 1, it is characterised in that:It is described to receive Imitative steel fiber reinforced concrete layer (3) bottom surface of rice is flushed with the excavation face (1) of cavern.
7. cavern's shallow-layer landslide supporting construction under the unfavorable geological condition according to claim 1 or 2 or 6, it is characterised in that: The distance between two neighboring steel arch-shelf (4) is 0.5~1.0m.
8. cavern's shallow-layer landslide supporting construction under unfavorable geological condition according to claim 7, it is characterised in that:The steel Bow member (4) at least covers landslide region (2) and both sides extension forwards, backwards is not less than 10m.
CN201621461894.5U 2016-12-29 2016-12-29 Cavern's shallow-layer landslide supporting construction under unfavorable geological condition Active CN206360708U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113153362A (en) * 2020-12-30 2021-07-23 中铁隧道集团三处有限公司 Construction method of high-temperature tunnel supporting structure under high ground stress
CN117418867A (en) * 2023-10-10 2024-01-19 深圳市科顺防水工程有限公司 Underground tunnel waterproof structure suitable for span and height of not less than 20 m and construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113153362A (en) * 2020-12-30 2021-07-23 中铁隧道集团三处有限公司 Construction method of high-temperature tunnel supporting structure under high ground stress
CN117418867A (en) * 2023-10-10 2024-01-19 深圳市科顺防水工程有限公司 Underground tunnel waterproof structure suitable for span and height of not less than 20 m and construction method

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Effective date of registration: 20180427

Address after: No. 82, Hudong Road, Gulou District, Fuzhou, Fujian Province

Patentee after: China Electric Power Construction Group aviation Port Construction Co., Ltd.

Address before: 310014 Chao Wang Road, Xiacheng City, Hangzhou, Zhejiang Province, No. 22

Patentee before: Co., Ltd of East China Investigation and Design Institute of electricity Jian group of China

TR01 Transfer of patent right