CN207295660U - A kind of attached cavern excavation supporting structure of sand gravel layer tunnel - Google Patents
A kind of attached cavern excavation supporting structure of sand gravel layer tunnel Download PDFInfo
- Publication number
- CN207295660U CN207295660U CN201721165151.8U CN201721165151U CN207295660U CN 207295660 U CN207295660 U CN 207295660U CN 201721165151 U CN201721165151 U CN 201721165151U CN 207295660 U CN207295660 U CN 207295660U
- Authority
- CN
- China
- Prior art keywords
- column
- steel
- gravel layer
- attached
- sand gravel
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
A kind of attached cavern excavation supporting structure of sand gravel layer tunnel, including erecting in the first column and the second column on attached cavern's portal both sides side wall, the bracket with card slot is each provided with first column and the second column, crossbeam both ends are weldingly fixed in the card slot of bracket, crossbeam is fixedly connected by more support pier studs with multiple crown arc I-steel at the top of tunnel, first column and the second column are fixedly connected with the first column crown arc I-steel and the second column crown arc I-steel one end respectively, form attached cavern's rectangle portal supporting construction.The attached cavern excavation supporting structure of a kind of sand gravel layer tunnel provided by the utility model, ensure that the continuity and security protection ability of hole excavation construction preliminary bracing, realizes the safe efficient construction of the attached cavern excavation of sand gravel layer tunnel.
Description
Technical field
Underground cavern excavation construction field is the utility model is related to, especially a kind of attached cavern excavation of sand gravel layer tunnel
Supporting structure.
Background technology
With the development of water conservancy and hydropower cause, the exploitation of hydraulic and hydroelectric engineering is progressively to western plateau and the exhibition of valley basin
Open, build dam condition and become increasingly complex, especially the key construction project under development of the West Regions opportunity, mountain Gao Gushen, coating
Deep, complex geologic conditions.In many sand gravel tunnel excavations, especially excavated section it is larger hole section, surrounding rock stability
Difference.Since the excavated section and free face of sand gravel layer tunnel and its attached cavern's intersection increase, sand gravel layer is easily by external force
There is loosening, slump situation in disturbance, and preliminary bracing is difficult, construction safety risk is high, therefore, takes scientific and reasonable measure timely
It is particularly important that carrying out attached cavern excavation support protection.
Stable rock mass has self-stable ability, does not produce load, then there may be cave in, it is necessary to supporting knot for unstable rock mass
Structure is supported.Unstable surrounding rock, which loses stabilization, a process, if providing necessary help formula in this process
Limitation, then country rock remains able to enter stable state.For sand gravel layer tunnel excavation, excavating country rock needs to adopt in time
Take supporting measure, the large cross section excavation position such as especially attached cavern, intersection, sand gravel layer country rock easily lose from steady and
Cause and cave in, construction safety risk is high.Therefore, only take measure rapidly and efficiently to carry out supporting in time, can just be more advantageous to
The stabilization and safe construction of attached cavern.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of attached cavern excavation support knot of sand gravel layer tunnel
Structure, can solve sand gravel layer tunnel with its attached cavern's intersection since excavated section and free face increase, in excavation construction
Easily there is loosening, slump phenomenon in middle sand gravel layer country rock, causes difficult preliminary bracing, construction safety risk height, construction efficiency low
The problem of, it ensure that the continuity and security protection ability of hole excavation construction preliminary bracing, realize the attached hole of sand gravel layer tunnel
The safe efficient construction that room is excavated.
In order to solve the above technical problems, technical solution is used by the utility model：A kind of sand gravel layer tunnel is attached
Cavern excavation supporting structure, including erect vertical in the first column and the second column on attached cavern's portal both sides side wall, first
The bracket with card slot is each provided with column and the second column, crossbeam both ends are weldingly fixed in the card slot of bracket, and crossbeam passes through more
Root support pier stud is fixedly connected with multiple crown arc I-steel at the top of tunnel, and the first column and the second column are respectively with first
Column crown arc I-steel and the second column crown arc I-steel one end are fixedly connected, and form attached cavern's rectangle portal branch
Protection structure.
Preferably, between the first column and the first column crown arc I-steel, the second column and the second column crown arc
Each support pier stud between shape I-steel, on crossbeam is connected with each crown arc I-steel by connecting plate using bolt
Connect.
Preferably, 1 row's anchor pole, anchor pole and beam welding are each provided with the surrounding rock of chamber of crossbeam upper and lower.
Preferably, anchor pole is self-advancing type hollow grouting anchor, after bolt grouting with beam welding.
A kind of construction method that the attached cavern excavation of sand gravel layer tunnel is carried out using supporting structure, this method include following
Step：
Step 1：Sand gravel layer tunnel excavation is carried out, and preliminary bracing is carried out using steel arch-shelf；
Step 2：When being excavated to away from attached 1 meter of cavern's portal starting point pile No., belonging to the side wall restocking of cavern hole side
Vertical first column, in the bracket of the first column upper end welded bands card slot, initial stage is carried out using the first column crown arc I-steel
Supporting, the first column crown arc I-steel are connected by screw bolts with the first column by connecting plate；
Step 3：As the progress of sand gravel layer tunnel excavation erects follow-up more interim columns successively, in each interim column
Upper installation crown arc I-steel, it is each to be connected by screw bolts temporarily between column and each crown arc I-steel by connecting plate,
And be drilled with anchor pole, be welded to connect muscle and hang reinforced mesh, the side wall in attached cavern side is not welded to connect muscle and bar-mat reinforcement
Piece；
Step 4：By each interim connecting plate between column and crown arc I-steel in the range of bracket and attached cavern
After wrapping, construction of shotcrete is carried out；
Step 5：When after sand gravel layer tunnel excavation to attached cavern's portal terminal pile No. at 1 meter, in attached cavern one
The second column is erected on the side wall of side, in the bracket of the second column upper end welded bands card slot, using the second column crown arc work
Word steel carries out preliminary bracing, and the second column crown arc I-steel is connected by screw bolts with the second column by connecting plate；
Step 6：After the completion of the bolt-spary supports in the range of attached cavern's portal, the first column and the second column are removed by root
Between all side wall bow members interim column；
Step 7：Crossbeam both ends are placed to the bracket on attached the first column of cavern's portal both sides and the second column respectively
Card slot in, after each support pier stud set on crossbeam is connected firmly with corresponding crown arc I-steel, then by crossbeam two
Firm welding is held in the card slot of bracket；
Step 8：1 row's anchor pole is respectively set in the surrounding rock of chamber of crossbeam upper and lower, is carried out after anchor pole drilling slip casting with crossbeam
Welding, and crossbeam closing spray shield is carried out, with anchorage beam, form attached cavern's rectangle portal supporting construction；
Step 9：After sand gravel layer tunnel continues 1 ~ 2 circulation of excavation supporting construction, attached cavern excavation scope is carried out
Surveying setting-out, and hole excavation is carried out along excavation line using digging machine；
Step 10：Attached Mass Near The Top of Underground Cavity inclined-plane carries out excavation control by the slope ratio of 1 ﹕ 3, into hole excavate 3.5m after in time into
Row bolt-spary supports；
Complete the attached cavern excavation of sand gravel layer tunnel.
The attached cavern excavation supporting structure of a kind of sand gravel layer tunnel provided by the utility model, has the beneficial effect that：
1st, simple for structure, making quick, barrier propterty easy to process, flexible for installation is stablized, and has reached raising construction efficiency
With the beneficial effect of safety coefficient.
2nd, it is attached by using crossbeam replacement is set up on portal top on the basis of sand gravel layer tunnel excavation preliminary bracing
Belong to the mode of interim column in the range of cavern's portal, form the door shape supporting structure that attached cavern's portal excavates, it is ensured that
Sand gravel country rock is in stable state in work progress, ensure that the smooth excavation of attached cavern, and digging section construction for follow-up hole carries
Advantage is supplied（Attached cavern can be used as interim lay-by, easy to give another the right of way and slag tap in tunnel）.
3rd, the various components such as column, crossbeam, interim column, support pier stud, crown arc I-steel, connecting plate can be by mark
Quasi- part is processed making, installs, dismantles convenient, and the interim column of dismounting can be used for follow-up hole and dig in the preliminary bracing of section,
The beneficial effect of effective reduction construction cost is reached.
4th, compared with traditional construction mode, attached cavern's portal is changed to rectangle, attached Mass Near The Top of Underground Cavity by arc by gateway opening type
Crown is changed to inclined-plane, on the premise of construction safety is ensured, meet that attached cavern uses function, has both reduced attached cavern excavation
Quantities, and excavation supporting difficulty is reduced, reach safety, economy, the beneficial effect efficiently constructed.
Sand gravel layer tunnel can be solved with its attached cavern's intersection since excavated section and free face increase, excavated
Easily there is loosening, slump phenomenon in sand gravel layer country rock in construction, causes difficult preliminary bracing, construction safety risk height, construction work
The problem of low is imitated, the continuity and security protection ability of hole excavation construction preliminary bracing is ensure that, it is attached to realize sand gravel layer tunnel
Belong to the safe efficient construction of cavern excavation.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is the front view of the utility model；
Fig. 2 is the side view of the first column of the utility model and its first column crown arc I-steel；
Fig. 3 is the schematic diagram of the preliminary supporting structure formed after the completion of two method and step 5 of the utility model embodiment.
Embodiment
Embodiment one
As depicted in figs. 1 and 2, the attached cavern excavation supporting structure of a kind of sand gravel layer tunnel, including erect in attached hole
The first column 1 and the second column 12 on the side wall of room portal both sides, band card slot is each provided with the first column 1 and the second column 12
Bracket 2,3 both ends of crossbeam are weldingly fixed in the card slot of bracket 2, and crossbeam 3 passes through more support pier studs 4 and attached Mass Near The Top of Underground Cavity
Multiple crown arc I-steel 5 be fixedly connected, the first column 1 and the second column 12 respectively with the first column crown arc I-shaped
Steel 10 is fixedly connected with 11 one end of the second column crown arc I-steel, forms attached cavern's rectangle portal supporting construction.
Between first column 1 and the first column crown arc I-steel 10, the second column 12 and the second column crown arc
Each support pier stud 4 between I-steel 11, on crossbeam 3 and each crown arc I-steel 5 by connecting plate 6 using bolt 7 into
Row connection.
Two rows of anchor poles 9 are each provided with the surrounding rock of chamber of 3 upper and lower of crossbeam, anchor pole 9 is welded with crossbeam 3.
Anchor pole 9 is the SD25N self-advancing type hollow grouting anchors of 3m long, and array pitch 0.6m, pitch-row 1.5m, each anchor pole 9 is positioned at two
Between a support pier stud 4,15 degree in anchor pole angle horizontal direction, welded after 9 slip casting of anchor pole with crossbeam 3.
First column 1 and the second column 12, bracket 2, support pier stud 4, crown arc I-steel 5, the first column crown arc
10 and second column crown arc I-steel 11 of shape I-steel uses I18 I-steel processing and fabricatings, and crossbeam 3 uses I20 I-shapeds
Steel processing and fabricating.
Connecting plate 6 using 10mm thickness steel plate processing and fabricating, using the bolt 7 of M12 × 40, away from 1 top 40cm's of column
Position welding sets bracket 2, i.e., bracket 2 is away from 13 vertical range 40cm of tunnel side wall spring line.
Embodiment two
As shown in figure 3, a kind of construction method that the attached cavern excavation of sand gravel layer tunnel is carried out using above-mentioned supporting structure,
This method comprises the following steps：
Step 1：Sand gravel layer tunnel is carried out using high-power digging machine to excavate along spring line 13, and is carried out just using steel arch-shelf
Phase supporting；
Step 2：When being excavated to away from attached 1 meter of cavern's portal starting point pile No., the side wall restocking in attached cavern side
Vertical first column 1, in the bracket 2 of 1 upper end welded bands card slot of the first column, is carried out using the first column crown arc I-steel 10
Preliminary bracing, the first column crown arc I-steel 10 are connected with the first column 1 by connecting plate 6 using bolt 7；
Step 3：As the progress of sand gravel layer tunnel excavation erects follow-up more interim columns 8 successively, each interim vertical
Crown arc I-steel 5 is installed on column 8, it is each that spiral shell is used by connecting plate 6 between column 8 and each crown arc I-steel 5 temporarily
Bolt 7 connects, and is drilled with anchor pole, is welded to connect muscle and hangs reinforced mesh, but in the side wall of attached cavern side（I.e. attached cavern
In the range of portal）Muscle and reinforced mesh are not welded to connect；
Step 4：By each interim connection between column 8 and crown arc I-steel 5 in the range of bracket 2 and attached cavern
After plate 6 wraps, construction of shotcrete is carried out；
Step 5：When after sand gravel layer tunnel excavation to attached cavern's portal terminal pile No. at 1 meter, belonging to cavern hole one
The second column 12 is erected on the side wall of side, in the bracket 2 of 12 upper end welded bands card slot of the second column, using the second column crown arc
Shape I-steel 11 carries out preliminary bracing, and the second column crown arc I-steel 11 and the second column 12 use spiral shell by connecting plate 6
Bolt 7 connects；
Step 6：After the completion of the bolt-spary supports in the range of attached cavern's portal, it is vertical to remove the first column 1 and second by root
The interim column 8 of all side wall bow members between column 12, and clear up the debris on 5 connecting plate of bracket 2 and crown arc I-steel；
Step 7：3 both ends of crossbeam are placed on attached cavern's portal both sides the first column 1 and the second column 12 respectively
In the card slot of bracket 2, after each support pier stud 4 set on crossbeam 3 is connected firmly with corresponding crown arc I-steel 5, then
By 3 both ends firm welding of crossbeam in the card slot of bracket 2；
Step 8：1 row's anchor pole 9 is respectively set in the surrounding rock of chamber of 3 upper and lower of crossbeam, 15 degree in 9 angle horizontal direction of anchor pole,
Anchor pole 9 is welded after creeping into slip casting with crossbeam 3, and carries out the closing spray shield of crossbeam 3, with anchorage beam 3, forms attached cavern's square
Shape portal supporting construction；
Step 9：Sand gravel layer tunnel continues 1 ~ 2 circulation of excavation supporting construction（3~6m）Afterwards, to attached cavern excavation model
Enclose and measure unwrapping wire, and hole excavation is carried out along excavation line using digging machine；
Step 10：Attached Mass Near The Top of Underground Cavity inclined-plane carries out excavation control by the slope ratio of 1 ﹕ 3, into hole excavate 3.5m after in time into
Row bolt-spary supports；
Step 11：3 center of crossbeam install deformation observation point, periodic monitoring sedimentation and deformation value,
Complete the attached cavern excavation of sand gravel layer tunnel.
Claims (2)
1. a kind of attached cavern excavation supporting structure of sand gravel layer tunnel, including erect on attached cavern's portal both sides side wall
First column（1）With the second column（12）, it is characterised in that：First column（1）With the second column（12）On be each provided with band card
The bracket of groove（2）, crossbeam（3）Both ends are weldingly fixed on bracket（2）Card slot in, crossbeam（3）Pass through more support pier studs（4）With
Multiple crown arc I-steel at the top of tunnel（5）It is fixedly connected, the first column（1）With the second column（12）It is vertical with first respectively
Capital curved arch I-steel（10）With the second column crown arc I-steel（11）One end is fixedly connected, and forms attached cavern's rectangle
Portal supporting construction.
A kind of 2. attached cavern excavation supporting structure of sand gravel layer tunnel according to claim 1, it is characterised in that：Crossbeam
（3）1 row's anchor pole is each provided with the surrounding rock of chamber of upper and lower（9）, anchor pole（9）With crossbeam（3）Welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721165151.8U CN207295660U (en) | 2017-09-12 | 2017-09-12 | A kind of attached cavern excavation supporting structure of sand gravel layer tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721165151.8U CN207295660U (en) | 2017-09-12 | 2017-09-12 | A kind of attached cavern excavation supporting structure of sand gravel layer tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207295660U true CN207295660U (en) | 2018-05-01 |
Family
ID=62446988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721165151.8U Active CN207295660U (en) | 2017-09-12 | 2017-09-12 | A kind of attached cavern excavation supporting structure of sand gravel layer tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207295660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107653848A (en) * | 2017-09-12 | 2018-02-02 | 中国葛洲坝集团基础工程有限公司 | A kind of attached cavern excavation supporting construction of sand gravel layer tunnel and its construction method |
-
2017
- 2017-09-12 CN CN201721165151.8U patent/CN207295660U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107653848A (en) * | 2017-09-12 | 2018-02-02 | 中国葛洲坝集团基础工程有限公司 | A kind of attached cavern excavation supporting construction of sand gravel layer tunnel and its construction method |
| CN107653848B (en) * | 2017-09-12 | 2019-04-09 | 中国葛洲坝集团基础工程有限公司 | A kind of attached cavern excavation support construction of sand gravel layer tunnel and its construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104612162B (en) | A kind of Deep Foundation Pit of Metro Stations excavation construction method | |
| CN110924959B (en) | Construction method of water-rich weak surrounding rock tunnel penetrating fault fracture zone | |
| CN110905530B (en) | Stability control construction method for water-rich soft rock tunnel penetrating fault fracture zone | |
| CN211258623U (en) | Water-rich weak surrounding rock tunnel supporting system crossing fault fracture zone | |
| CN110629671A (en) | Suspension bridge anchorage and construction method thereof | |
| CN211081876U (en) | Pass through weak surrounding rock tunnel preliminary bracing structure of rich water in broken area of fault | |
| CN102003187A (en) | Construction method of under cutting excavation supporting of of deeply buried soft-rock large tunnel | |
| CN108131145A (en) | A kind of construction method of super-span tunnel excavation support | |
| CN103114595A (en) | Support method and device of support pile preformed core-soil double-buttress inclined inner-strut foundation ditch | |
| CN105134258A (en) | Construction method by utilizing multiple steps and leg-locking of pipe shed for completely-weathered VI-grade surrounding rock of tunnel | |
| CN105649091A (en) | High slope support method and structure | |
| CN112302686B (en) | Vertical jacking construction method for entering tunnel inclined shaft into main tunnel | |
| CN207295660U (en) | A kind of attached cavern excavation supporting structure of sand gravel layer tunnel | |
| CN206530341U (en) | A kind of underground cavern crown structure and its underground chamber | |
| CN113074003A (en) | Method for inhibiting deformation of small-clear-distance tunnel in argillaceous sandstone stratum | |
| CN108035360A (en) | A kind of method for pattern foundation pit supporting structure | |
| CN209838435U (en) | Unloading arch backfill structure for penetrating through large-sized non-filling karst cave tunnel | |
| CN209760299U (en) | light and shade of avoiding house to tear open and move is dug and is combined subway station structure | |
| CN208815566U (en) | The transverse direction that open cut or lid dig underground main structure below existing building digs construction | |
| CN209228377U (en) | A kind of multistage set arch structure and pipe canopy set arch structure for tunnel portal supporting | |
| CN106640117A (en) | Underground cavern top arc structure, underground cavern and construction method of underground cavern | |
| CN115977696A (en) | Soft rock tunnel intersection supporting construction method | |
| WO2023138033A1 (en) | Short-bench construction method for weak surrounding rock section of super-large-section tunnel | |
| CN107653848B (en) | A kind of attached cavern excavation support construction of sand gravel layer tunnel and its construction method | |
| CN205977233U (en) | Tunnel lock foot spouts pilework soon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |