CN206928956U - A kind of structure of PBA grids - Google Patents
A kind of structure of PBA grids Download PDFInfo
- Publication number
- CN206928956U CN206928956U CN201720412255.8U CN201720412255U CN206928956U CN 206928956 U CN206928956 U CN 206928956U CN 201720412255 U CN201720412255 U CN 201720412255U CN 206928956 U CN206928956 U CN 206928956U
- Authority
- CN
- China
- Prior art keywords
- segmental arc
- steel frame
- grid steel
- section
- pilot tunnel
- 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
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A kind of PBA cell structures, include be separately mounted to both sides at the top of bored tunnel encircle grid steel frame in pilot tunnel grid steel frame and button when being connected to two between pilot tunnel grid steel frame；The button arch grid steel frame is horizontally set on below inverted arch section, the bottom section between two side pilot tunnel grid steel frames and the vertical middle compartment being connected between inverted arch section and bottom section middle part are formed by inverted arch section；The inverted arch section is domed, includes the first segmental arc being from left to right sequentially connected, the second segmental arc, the 3rd segmental arc and the 4th segmental arc.The utility model solves that traditional structure installation is inaccurate, stress performance is bad, work progress is complicated and the technical problem of connecting node low construction efficiency.
Description
Technical field
Utility model belongs to city track traffic engineering technical field, particularly a kind of structure of PBA grids.
Background technology
Tunneling cavern-pile method（PBA）Engineering method has been widely used for subway work at present, and the engineering method is primarily adapted for use in ground face ring
Border is more complicated, and settlement request is higher, and the larger boring construction technique of structural span, its core construction technology is by being performed in hole
Skirt piles, then perform button arch, and final contrary sequence method completes the construction technology of structure.Reserved wherein on the small pilot tunnel grid in side and buckle arch lattice
Grid node, when the later stage excavates button talent arch soil side, button arch grid being connected with the small pilot tunnel Preserved node in side, required precision is very high, once
There is deviation, detaining the quality of connection of arch will be difficult to ensure that, seminar intends the measure by being taken in the project of applying, nervous in the duration
In the case of, it is the quality management of tunneling supporting construction, the security of supporting construction and reduces engineering cost, there is provided technology refers to
Lead and significant help.
Conventional connection construction method has three kinds, first, node reserves steel plate, i.e.,：Reserved on the small pilot tunnel constructed in advance
Steel plate, when the first branch of button arch is constructed, the angle steel on button arch grid is reserved steel plate with small pilot tunnel and welded；Second, node reserves angle
Steel, i.e.,：Angle steel is reserved on the small pilot tunnel constructed in advance, when the first branch of button arch is constructed, the angle steel on button arch grid is reserved with small pilot tunnel
Angle steel be attached using bolt.Third, node reserves reinforcing bar gets rid of head, i.e., grid master is reserved on the small pilot tunnel constructed in advance
Muscle, when the first branch of button arch is constructed, the cage bar on button arch grid is welded with reserved cage bar.
It is using the advantages of reserved steel plate：Steel plate contact area is big, the selectable leeway of button arch grid is larger；But individually
The shortcomings that being connected using reserved steel plate be：Grid connecting plate is not closely connected with pre-embedded steel slab, easily dislocation.Using reserved angle splice bar
The advantages of be：Using riveting, node strength is big, and stress is good；It is using the shortcomings that reserved angle splice bar individually：Reserved angle steel and
Button arch grid connecting plate bolt eye is not easy to align, and can not realize bolt.It is using the advantages of reserved grid cage bar：Reserved steel bar
Docking is adjusted flexibly, and is using the shortcomings that reserved grid cage bar connection individually：Joints are bad, and are full during small pilot drive
Very big potential safety hazard be present, it is necessary to be backbreak to C position of joints in the position of sufficient reserved steel bar.
Therefore, in order to solve the above technical problems, connecting rapid construction side it is necessory to the PBA grids for providing a kind of innovation
Method, to overcome the defect of the prior art.
Utility model content
The purpose of utility model is to provide a kind of structure of PBA grids, to solve traditional structure and install inaccurate, stress
Performance is bad, work progress is complicated and the technical problem of connecting node low construction efficiency.
To achieve the above object, utility model adopts the following technical scheme that.
A kind of PBA cell structures, include and be separately mounted to the side pilot tunnel grid steel frame of both sides and company at the top of bored tunnel
The button arch grid steel frame being connected between two side pilot tunnel grid steel frames；The button arch grid steel frame is horizontally set on by inverted arch section
Bottom section below inverted arch section, between two side pilot tunnel grid steel frames and it is vertical be connected in the middle part of inverted arch section and bottom section between in
Compartment is formed；The inverted arch section is domed, includes the first segmental arc being from left to right sequentially connected, the second segmental arc, the 3rd
Segmental arc and the 4th segmental arc；Pass through between the left side of first segmental arc and the top of corresponding side pilot tunnel grid steel frame
Bolt connection, the first segmental arc right-hand end are provided with the first connecting plate；The left end of second segmental arc is connected with first
Plate is bolted, and the right-hand end of the second segmental arc is located at the right side on middle compartment top；The right side of 4th segmental arc
It is bolted with the top of corresponding side pilot tunnel grid steel frame, the left end of the 4th segmental arc is provided with the second connection
Plate；Between the second segmental arc and the 4th segmental arc, its left end connects 3rd segmental arc with the welding of the second segmental arc
Connect, its right-hand end is bolted with the second connecting plate.
Preferably, the side pilot tunnel grid steel frame include at the top of arch, horizontal bottom and be connected at the top of arch with
Vertical edge between horizontal bottom both sides.
Preferably, it is provided with the top of the arch of the side pilot tunnel grid steel frame, at the link position of corresponding button arch grid steel frame
Reserved steel plate；The left end of first segmental arc passes through from the pilot tunnel grid steel frame of side, and the first segmental arc is in link position
Place is bolted with reserved steel plate；The right-hand end of 4th segmental arc passes through from the pilot tunnel grid steel frame of side, and the 4th
Segmental arc is bolted at link position with reserved steel plate.
Preferably, the both sides of the button arch grid steel frame are connected to lengthening section；The wherein right part of left side lengthening section
With the left end bolt connection of the first segmental arc, the left part of right side lengthening section and the right-hand end bolt of the 4th segmental arc connect
Connect.
Preferably, first connecting plate is provided with two pieces in the right-hand end of the first segmental arc, arcuately axially connects respectively
It is connected on side before and after the first segmental arc；The end of two piece of first connecting plate exceeds the end of the first segmental arc, forms clip slot；It is described
The left end of second segmental arc is plugged on clip slot, and is bolted.
Preferably, second connecting plate is provided with two pieces in the left end of the 4th segmental arc, arcuately axially connects respectively
It is connected on side before and after the 4th segmental arc；The end of two piece of second connecting plate exceeds the end of the 4th segmental arc, forms clip slot；It is described
The right-hand end of 4th segmental arc is plugged on clip slot, and is bolted.
Preferably, the right-hand end of second segmental arc is provided with junction steel plate；The junction steel plate has two pieces, respectively edge
Arc is axially connected to side before and after the second segmental arc；The end of two pieces of junction steel plates exceeds the end of the second segmental arc, is formed
Clip slot；The left end of 3rd segmental arc is plugged in clip slot, and by being welded and fixed.
Utility model has the characteristics that and beneficial effect compared with prior art.
1st, the button arch grid steel frame in the utility model is spliced by multistage segmental arc, button arch grid when improving construction
The accuracy of steelframe installation.
2nd, the connection in the utility model between each segmental arc and segmental arc and between the pilot tunnel grid steel frame of side
Connection is connected by screw bolts to be combined with being welded to connect, and this connected mode shortens the button arch grid steel frame set-up time, and
Improve node quality of connection.
3rd, it is simple to operate in the utility model, it is practical, easily received by operator.
4th, the 3rd segmental arc one end in the utility model and the 4th segmental arc bolt connection, the other end and the second segmental arc
It is welded to connect, this connected mode avoids to be used welding connection node stress bad and be connected by screw bolts accuracy entirely entirely
The defects of low.
5th, the utility model project dug underground bad to geological conditions, landslide risk during installation grid can be reduced.
Brief description of the drawings
Utility model is further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is pilot tunnel grid steel frame structural representation in side in the utility model.
Fig. 3 is the structural representation of button arch grid steel frame in the utility model.
Reference：1- sides pilot tunnel grid steel frame, 1.1- arches top, 1.2- horizontal bottoms, the vertical edge of 1.3-,
2- inverted arch section, the segmental arcs of 2.1- first, the segmental arcs of 2.2- second, the segmental arcs of 2.3- the 3rd, the segmental arcs of 2.4- the 4th, 3-
Compartment, the connecting plates of 5- first, the connecting plates of 6- second, 7- lengthening sections, 8- reserve steel plate, 9- junction steel plates in bottom section, 4-.
Embodiment
As Figure 1-3, this PBA cell structures, the side pilot tunnel for being separately mounted to both sides at the top of bored tunnel is included
Grid steel frame 1 and the button arch grid steel frame being connected between two side pilot tunnel grid steel frames 1；The button arch grid steel frame is by inverted arch
Section 2, the bottom section 3 being horizontally set between the lower section of inverted arch section 2, two side pilot tunnel grid steel frames 1 and is vertically connected to inverted arch section 2
Middle compartment 4 between the middle part of bottom section 3 is formed；The inverted arch section 2 is domed, includes the first arc being from left to right sequentially connected
Shape section 2.1, the second segmental arc 2.2, the 3rd segmental arc 2.3 and the 4th segmental arc 2.4；
Pass through bolt between the left side of first segmental arc 2.1 and the top of the side pilot tunnel grid steel frame 1 of corresponding side
Connection, the right-hand end of the first segmental arc 2.1 are provided with the first connecting plate 5；The left end and first of second segmental arc 2.2
Connecting plate 5 is bolted, and the right-hand end of the second segmental arc 2.2 is located at the right side on the middle top of compartment 4；4th arc
The right side of section 2.4 is bolted with the top of corresponding side pilot tunnel grid steel frame 1, the left-hand end of the 4th segmental arc 2.4
Portion is provided with the second connecting plate 6；For 3rd segmental arc 2.3 between the second segmental arc 2.2 and the 4th segmental arc 2.4, it is left
Side end is welded to connect with the second segmental arc 2.2, and its right-hand end is bolted with the second connecting plate 6.
In the present embodiment, the side pilot tunnel grid steel frame 1 includes 1.1, horizontal bottom 1.2 at the top of arch and is connected to
Vertical edge 1.3 at the top of arch between 1.1 and the both sides of horizontal bottom 1.2.
In the present embodiment, 1.1 at the top of the arch of the side pilot tunnel grid steel frame 1, the connection position that button encircles grid steel frame is corresponded to
Put place and be provided with reserved steel plate 8；The left end of first segmental arc 2.1 passes through from side pilot tunnel grid steel frame 1, the first arc
Section 2.1 is bolted at link position with reserved steel plate 8；The right-hand end of 4th segmental arc 2.4 is from side pilot tunnel
Passed through in grid steel frame 1, the 4th segmental arc 2.4 is bolted at link position with reserved steel plate 8.
In the present embodiment, the both sides of the button arch grid steel frame are connected to lengthening section 7；The wherein right side of left side lengthening section
End and the left end bolt connection of the first segmental arc 2.1, the left part of right side lengthening section and the right side of the 4th segmental arc 2.4
End bolt connects.
In the present embodiment, first connecting plate 5 is provided with two pieces in the right-hand end of the first segmental arc 2.1, respectively along arc
Shape is axially connected to side before and after the first segmental arc 2.1；The end of two piece of first connecting plate 5 exceeds the end of the first segmental arc 2.1
Portion, form clip slot；The left end of second segmental arc 2.2 is plugged on clip slot, and is bolted.
In the present embodiment, second connecting plate 6 is provided with two pieces in the left end of the 4th segmental arc 2.4, respectively along arc
Shape is axially connected to side before and after the 4th segmental arc 2.4；The end of two piece of second connecting plate 6 exceeds the end of the 4th segmental arc 2.4
Portion, form clip slot；The right-hand end of 4th segmental arc 2.4 is plugged on clip slot, and is bolted.
In the present embodiment, the right-hand end of second segmental arc 2.2 is provided with junction steel plate 9；The junction steel plate 9 has two
Block, arcuately axially it is connected to side before and after the second segmental arc 2.2 respectively；The end of two pieces of junction steel plates 9 exceeds the second arc
The end of section 2.2, form clip slot；The left end of 3rd segmental arc 2.3 is plugged in clip slot, and by being welded and fixed.
The utility model uses following process：The first side pilot tunnel grid steel frame 1 in installation left side, the at right pilot tunnel the 4th
When the grid steel frame of segmental arc 2.4 is installed, grid steel frame one end the second connecting plate 6 of welding in advance, the other end not strip connecting plate, pass through
Actual size is measured, after intercepting additional length, the grid steel frame of the 4th segmental arc of in-site installation 2.4, one end of the second connecting plate of band 6
Bolt is directly gone up, the reserved steel plate 8 on the side pilot tunnel grid steel frame 1 on the side of strip connecting plate and right side does not weld.This practicality is new
The structure for buckleing arch grid steel frame sectionally smooth join in type, the shortcomings that overall structure can be avoided, meanwhile, its advantage is remained again.
Construction method of the present utility model, including following construction procedure.
Step 1：Grid steel frame is processed, and make-up arch grid steel frame carries out assembled experiment in advance, it is ensured that button arch grid steel frame
Machining accuracy.
Step 2, per-fore pouring liquid with small pipe strengthening stratum excavate side pilot tunnel；After the completion of the side pilot tunnel grid steel frame of both sides, two
Individual side pilot tunnel grid steel frame is respectively provided with reserved steel plate 8, and carries out protection, reserves bolt when first branch is constructed in advance, and add extruded sheet
Protected.
Step 3, reinforce button and encircle the left hole soil body, excavate button and encircle the left hole earthwork；Button encircles left hole soil stabilization must in place, platform
Rank method is excavated button arch and just propped up, and length of bench is not less than 3m.
Step 4, installing tache encircles the button arch grid steel frame in left hole, and reserves the phase of steel plate 8 with the side pilot tunnel grid steel frame in left side
Even；The concrete at left side pilot tunnel grid steel frame link position is abolished, successively the first segmental arc of installing tache arch grid steel frame
2.1 and second segmental arc 2.2, longitudinal pitch 0.5m, and add extruded sheet to be protected；Perform the He of bottom section 3 of button arch grid steel frame
Middle compartment 4, gunite concrete.
Step 5, pre-grouting reinforce button arch You Dong stratum, excavate the right pilot tunnel soil body in arch, abolish right edge pilot tunnel grid
Concrete at steelframe link position, installing tache encircle the 4th segmental arc 2.4 of grid steel frame.
Step 6, abolish concrete installation junction steel plate 9 and bolt around the right-hand end position of the second segmental arc 2.2.
Step 7, the physical length of the 3rd segmental arc 2.3 is measured, prepare the 3rd segmental arc of installation after intercepting redundance
2.3, one end and the right-hand end of the second segmental arc 2.2 of the 3rd segmental arc 2.3 are welded to connect, the other end and the 4th segmental arc 2.4
Left end bolt connection.
Step 8, the 3rd segmental arc 2.3 is installed, gunite concrete, button is completed and encircles right hole preliminary bracing；
In the present embodiment, spaced out before and after two side pilot tunnel constructions, spacing is not less than 10m, and side pilot tunnel uses benching tunnelling method
Construction, step pitch 0.5m, C20 gunite concrete.
In the present embodiment, excavate button using benching tunnelling method and encircle right pilot tunnel, the segmental arc 2.4 of side pilot tunnel the 4th on accurate connection right side
Grid steel frame and right side side pilot tunnel grid steel frame.
In the present embodiment, angle steel is reserved in one end of the 3rd segmental arc 2.3, and other end angle steel separates with the second segmental arc 2.2,
The grid of 3rd segmental arc 2.3, one end and the 4th segmental arc 2.4 are installed after the physical length for having measured the 3rd segmental arc 2.3
Bolt plate connects, and one end is helped to weld with the second segmental arc 2.2.
Above-described embodiment is not the exhaustion of embodiment, can also there is other embodiments, and above-described embodiment purpose exists
In explanation utility model, and the protection domain of unrestricted utility model, it is all by utility model simple change and Lai application it is equal
Fall in the protection domain of utility model.
Claims (7)
1. a kind of structure of PBA grids, include the side pilot tunnel grid steel frame for being separately mounted to both sides at the top of bored tunnel（1）With
It is connected to two side pilot tunnel grid steel frames（1）Between button arch grid steel frame；The button arch grid steel frame is by inverted arch section（2）, water
It is flat to be arranged on inverted arch section（2）Lower section, two side pilot tunnel grid steel frames（1）Between bottom section（3）And vertically it is connected to inverted arch section
（2）With bottom section（3）Middle compartment between middle part（4）Form；It is characterized in that：The inverted arch section（2）It is domed, include from a left side
The first segmental arc being sequentially connected to the right side（2.1）, the second segmental arc（2.2）, the 3rd segmental arc（2.3）With the 4th segmental arc
（2.4）；
First segmental arc（2.1）Left side and corresponding side side pilot tunnel grid steel frame（1）Top between pass through bolt
Connection, the first segmental arc（2.1）Right-hand end be provided with the first connecting plate（5）；Second segmental arc（2.2）Left end
With the first connecting plate（5）It is bolted；4th segmental arc（2.4）Right side and corresponding side side pilot tunnel grid steel
Frame（1）Top be bolted, the 4th segmental arc（2.4）Left end be provided with the second connecting plate（6）；3rd arc
Shape section（2.3）Positioned at the second segmental arc（2.2）With the 4th segmental arc（2.4）Between, its left end and the second segmental arc（2.2）
It is welded to connect, its right-hand end and the second connecting plate（6）It is bolted.
A kind of 2. structure of PBA grids according to claim 1, it is characterised in that：The side pilot tunnel grid steel frame（1）Including
Have at the top of arch（1.1）, horizontal bottom（1.2）And it is connected at the top of arch（1.1）With horizontal bottom（1.2）Between both sides
Vertical edge（1.3）.
A kind of 3. structure of PBA grids according to claim 2, it is characterised in that：The side pilot tunnel grid steel frame（1）Arch
At the top of shape（1.1）, corresponding button arch grid steel frame link position at be provided with reserved steel plate（8）；First segmental arc（2.1）'s
Left end is from side pilot tunnel grid steel frame（1）In pass through, the first segmental arc（2.1）At link position with reserved steel plate（8）It is logical
Cross bolt connection；4th segmental arc（2.4）Right-hand end from side pilot tunnel grid steel frame（1）In pass through, the 4th segmental arc
（2.4）At link position with reserved steel plate（8）It is bolted.
A kind of 4. structure of PBA grids according to claim 1, it is characterised in that：The both sides point of the button arch grid steel frame
Lengthening section is not connected with it（7）；The wherein right part of left side lengthening section and the first segmental arc（2.1）Left end bolt connection,
The left part of right side lengthening section and the 4th segmental arc（2.4）Right-hand end bolt connection.
A kind of 5. structure of PBA grids according to claim 1, it is characterised in that：First connecting plate（5）In the first arc
Shape section（2.1）Right-hand end be provided with two pieces, respectively arcuately axially be connected to the first segmental arc（2.1）Front and rear side；Two piece
One connecting plate（5）End exceed the first segmental arc（2.1）End, formed clip slot；Second segmental arc（2.2）A left side
Side end is plugged in clip slot, and is bolted.
A kind of 6. structure of PBA grids according to claim 1, it is characterised in that：Second connecting plate（6）In the 4th arc
Shape section（2.4）Left end be provided with two pieces, respectively arcuately axially be connected to the 4th segmental arc（2.4）Front and rear side；Two piece
Two connecting plates（6）End exceed the 4th segmental arc（2.4）End, formed clip slot；3rd segmental arc（2.3）The right side
Side end is plugged in clip slot, and is bolted.
A kind of 7. structure of PBA grids according to claim 1, it is characterised in that：Second segmental arc（2.2）Right side
End is provided with junction steel plate（9）；The junction steel plate（9）There are two pieces, be arcuately axially connected to the second segmental arc respectively（2.2）
Front and rear side；Two pieces of junction steel plates（9）End exceed the second segmental arc（2.2）End, formed clip slot；3rd arc
Section（2.3）Left end be plugged in clip slot, and by being welded and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720412255.8U CN206928956U (en) | 2017-04-19 | 2017-04-19 | A kind of structure of PBA grids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720412255.8U CN206928956U (en) | 2017-04-19 | 2017-04-19 | A kind of structure of PBA grids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206928956U true CN206928956U (en) | 2018-01-26 |
Family
ID=61349930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720412255.8U Expired - Fee Related CN206928956U (en) | 2017-04-19 | 2017-04-19 | A kind of structure of PBA grids |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206928956U (en) |
-
2017
- 2017-04-19 CN CN201720412255.8U patent/CN206928956U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109184700B (en) | Construction method for clamping rock in soft surrounding rock small-clear-distance tunnel stability | |
| CN104790974A (en) | City subway overlapped shield tunnel segment structure adopting special longitudinal connecting pieces | |
| CN104481546A (en) | Doubly curved arch construction method for enabling inclined shaft of soft rock tunnel to enter main tunnel | |
| CN104847380A (en) | Tunnel lining structure internal force reducing structure and construction method thereof | |
| CN104790973A (en) | Construction method of tunnel steel arch feet-lock bolts | |
| CN103244143B (en) | A kind of underground construction excavating construction method and underground station | |
| CN104947681A (en) | Super large super deep basement ground pit construction method | |
| CN102650212A (en) | Construction method for protecting partition wall in double-arch tunnel through temporary support of middle pilot tunnel | |
| CN110748349A (en) | Double-molecular originating method for small-clear-distance double-line tunnel shield | |
| CN104929649A (en) | Tunnel transverse cave-to-master cave top brushing construction method and top brushing structure | |
| CN106481347B (en) | A kind of anti-internal water pressure composite shield section of jurisdiction | |
| CN203742611U (en) | Strengthening supporting structure for opening ingate on side wall of tunnel under preliminary supporting condition | |
| CN214660232U (en) | Corrugated plate connecting structure for tunnel toughness support | |
| CN110645022A (en) | Self-anchored formwork support system for connecting channel and construction method | |
| CN204716248U (en) | Tunnel Heng Dong enters main hole and to caunch structure | |
| CN105927252B (en) | It is a kind of to excavate big cross section underground space structure transforming methods of structural system using rectangular top pipe | |
| CN211851855U (en) | Roadway supporting structure through argillaceous broken zone | |
| CN206928956U (en) | A kind of structure of PBA grids | |
| CN204754945U (en) | Mine method tunnel preliminary bracing lining cutting grid steel support make | |
| CN207974833U (en) | A kind of concrete column and the branch-cut bridge section big cross section grid paving structure that punches | |
| CN206338075U (en) | A kind of anti-internal water pressure composite shield section of jurisdiction | |
| CN105937248B (en) | Agent structure section construction and temporary plugging wall joint processing method | |
| CN101892844B (en) | Method for excavating tunnels undergoing advanced bolting by using CRD | |
| CN106836486A (en) | A kind of weak direction of principal axis connecting node of H types post and preparation method thereof | |
| CN107387131A (en) | A kind of asymmetric trouble hole supporting construction and its construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |