CN108278116A - A kind of Shallow Large Span pipe curtain support system and its construction method - Google Patents
A kind of Shallow Large Span pipe curtain support system and its construction method Download PDFInfo
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- CN108278116A CN108278116A CN201810060786.4A CN201810060786A CN108278116A CN 108278116 A CN108278116 A CN 108278116A CN 201810060786 A CN201810060786 A CN 201810060786A CN 108278116 A CN108278116 A CN 108278116A
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 354
- 239000010959 steel Substances 0.000 claims abstract description 354
- 238000003466 welding Methods 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 21
- 230000002787 reinforcement Effects 0.000 claims description 18
- 238000009412 basement excavation Methods 0.000 claims description 10
- 238000007569 slipcasting Methods 0.000 claims description 9
- 239000011449 brick Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 3
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 2
- 241000196133 Dryopteris Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/14—Lining predominantly with metal
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Abstract
The present invention relates to a kind of Shallow Large Span pipe curtain support system and its construction methods.Semi-circular ribs is arranged in interval in the inverse u shape support frame structured steel pipe of Shallow Large Span pipe curtain support system of the present invention, to reinforce the stability of steel pipe, steel pipe side wall is arranged at intervals with fluting along steel pipe longitudinal direction, it is welded to connect steel plate in slotting position, adjacent steel pipe is fixed together by junction steel plate.Interval welding ribs increases steel pipe rigidity in pipe curtain support system steel pipe of the present invention, adjacent steel pipe process is linked together by being welded to connect steel plate at the fluting on steel pipe side wall, substantially increase its lateral stiffness and bearing capacity, and steel tube connecting way is relatively easy, easy for construction, junction steel plate steel pipe below is cut, it is not high to the required precision of steel pipe jacking, difficulty of construction can be reduced, portal frame is set up at welding steel simultaneously, rectangular cross section can be built, space availability ratio is improved；Part shaped steel support replaces reinforcing bar, saves material.
Description
Technical field
The present invention relates to the construction methods of constructing underground building structure under large diameter steel pipe curtain supporting, are under the jurisdiction of tunnel and ground
The scope of lower engineering construction, and in particular to a kind of Shallow Large Span pipe curtain support system and its construction method.
Background technology
Pipe-roofing method is the one kind for belonging to Dryopteris sublaetaChing et Hsu, and when construction will not damage ground environment, Bu Huiying
Surface subsidence can be substantially reduced by ringing traffic and urban environment, pipe-roofing method.As passing through road, railway, works, airport
Deng trenchless technology, all achieve preferable effect in Japan, the U.S. and TaiWan, China.Pipe-roofing method is more by domestic scholars
The research and the successful implementation in engineering in year, have evolved into ripe.Pipe curtain steel pipe is connected by fore shaft, and is injected at the place of locking a door
Water-stop or mortar form the antipriming pipe curtain of sealing.But due to only being connected with fore shaft between traditional adjacent steel pipe of pipe curtain structure,
When causing lateral stiffness and the bearing capacity of integral tube curtain weaker, therefore excavating the soil body inside pipe curtain, need to set up a large amount of temporary supports
To ensure integrally-built stability, cause construction speed slower, lateral section is mostly domes, space availability ratio in addition
It is low.
Invention content
Under the conditions of a kind of shallow embedding, large-span pipe curtain supporting that large and small section can be applicable in
System and its construction method.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of Shallow Large Span pipe curtain support system, top and both sides form inverse u shape supporting frame using large diameter steel pipe
Semi-circular ribs is arranged in frame structure, the interior interval of steel pipe, and to reinforce the stability of steel pipe, semi-circular ribs and steel-pipe welding are solid
It is fixed；Steel pipe side wall is arranged at intervals with fluting along steel pipe longitudinal direction, and steel plate is welded to connect in slotting position, and junction steel plate is by adjacent steel
Pipe is fixed together.
Semi-circular ribs is arranged in interval in the steel pipe, and the distance at interval is 1~2m.
The curvature of the semi-circular ribs, curvature and steel pipe is consistent, and the height of semi-circular ribs is steel
The 1/4~1/5 of pipe diameter.
The slotting position be on steel pipe cross section since steel pipe center top to from diameter of steel tube 1/3~1/4 pairs
On the steel pipe side wall answered.
The length of the fluting 0.2~0.3m along steel pipe longitudinal side wall, every along the steel pipe side wall of steel pipe longitudinal direction
It slots every 2m.
The length of junction steel plate is the spacing at adjacent steel pipe fluting between the steel pipe, is 0.4~0.8m；Junction steel plate
Width be fluting length.
Setting injected hole in interval on the side wall of the steel pipe along longitudinal direction, the injected hole is set to right on steel pipe side wall
The center of circle and horizontal direction is answered to tilt 45 ° of position obliquely, using being symmetrical set；The aperture of the injected hole is 30
~40mm reduces the frictional resistance with the periphery soil body during steel pipe jacking from injected hole to the slip casting of steel pipe periphery, soil in reinforcing pipe
Body.
A diameter of 1.3~2.0m of the steel pipe, thickness are 14~22mm.
The construction method of above-mentioned Shallow Large Span pipe curtain support system, steps are as follows：
(1) preparation of construction
According to design pipe curtain support system structure, determines the size and quantity of pipe curtain support system steel pipe, designing and constructing
Fender post is performed at position, is excavated starting well, is then performed Guan Liang and diagonal brace respectively, it is ensured that the stability of starting well waits originating
When well excavation reaches projected depth, place is arranged, counter force wall is set, sets up pipe jacking equipment；
(2) inverse u shape support frame steel pipe heads into
Heading into for top steel pipe is carried out first, and jacking is carried out from centre to both sides；Heading into for side steel pipe is carried out again, laterally
Steel pipe then jacking from the top down, during steel pipe jacking, for reduce steel pipe and the periphery soil body frictional resistance, need to steel pipe periphery into
Row slip casting drag reduction carries out symmetrical holes slip casing by pressure, grouting pressure 0.5Mpa by symmetrical injected hole on steel pipe side wall
Or so, it is unearthed in steel pipe and is unearthed automatically using mechanical, horizontal screw drilling or push-bench construction；
(3) the semi-circular ribs of setting in steel pipe
In steel pipe after soil digging, the semi-circular ribs of welding at the design position of 1~2m is spaced in steel pipe, to reinforce
The stability of steel pipe, the curvature and steel pipe of semi-circular ribs are consistent, and the height of semi-circular ribs is diameter of steel tube 1/4
~1/5；
(4) it is welded to connect steel plate
On adjacent steel pipe side wall, it is spaced 2m along steel pipe longitudinal side wall and is provided with fluting, slotting position is that steel pipe is transversal
To on corresponding steel pipe side wall from diameter of steel tube 1/3~1/4 since steel pipe center top on face, the length of fluting is vertical along steel pipe
0.2~0.3m on side wall is welded to connect steel plate in slotting position, and the length of junction steel plate is adjacent steel pipe fluting between steel pipe
The spacing at place is 0.4~0.8m, and the width of junction steel plate is the length of fluting, and adjacent steel pipe is fixedly connected on by junction steel plate
Together, class beam type pipe curtain structure is formed；
(5) portal frame is set up
After waiting for fastener for connection, excavate pipe curtain below the soil body, wait excavate to pipe curtain position when, cutting junction steel plate with
Under steel pipe, and the steel pipe that cuts away is recycled；Then interim type steel support is set up, and is welded with junction steel plate, is formed
Portal frame, top junction steel plate are welded on portal frame, and left side junction steel plate is welded on the left of portal frame, and the right connects
Steel plate is connect to be welded on the right side of portal frame；The steel pipe for finally cutting remaining lower part makes all steel pipes in approximately the same plane；
(6) it constructs under pipe curtain
According to step (5), operation is repeated, completes the excavation of tunnel internal；
(7) tunnel floor is installed, installation, assembling reinforcement and concreting；
(8) tunnel sidewalls are installed, installation, assembling reinforcement and concreting；
(9) tunnel top is installed, installation, assembling reinforcement and concreting；
(10) temporary support and cleaning construction site are removed, building is carried out and builds by laying bricks or stones and fit up, completes Underground Construction, and
Each monitoring project is analyzed.
The construction method of second of Shallow Large Span pipe curtain support system, steps are as follows：
(1) preparation of construction
According to design pipe curtain support system structure, determines the size and quantity of pipe curtain support system steel pipe, designing and constructing
Fender post is performed at position, is excavated starting well, is then performed Guan Liang and diagonal brace respectively, it is ensured that the stability of starting well waits originating
When well excavation reaches projected depth, place is arranged, counter force wall is set, sets up pipe jacking equipment；
(2) inverse u shape support frame steel pipe heads into
Heading into for top steel pipe is carried out first, and jacking is carried out from centre to both sides；Heading into for side steel pipe is carried out again, laterally
Steel pipe then jacking from the top down, during steel pipe jacking, for reduce steel pipe and the periphery soil body frictional resistance, need to steel pipe periphery into
Row slip casting drag reduction carries out symmetrical holes slip casing by pressure, grouting pressure 0.5Mpa by symmetrical injected hole on steel pipe side wall
Or so, it is unearthed in steel pipe and is unearthed automatically using mechanical, horizontal screw drilling or push-bench construction；
(3) the semi-circular ribs of setting in steel pipe
In steel pipe after soil digging, the semi-circular ribs of welding at the design position of 1~2m is spaced in steel pipe, to reinforce
The stability of steel pipe, the curvature and steel pipe of semi-circular ribs are consistent, and the height of semi-circular ribs is diameter of steel tube 1/4
~1/5；
(4) it is welded to connect steel plate
On adjacent steel pipe side wall, it is spaced 2m along steel pipe longitudinal side wall and is provided with fluting, slotting position is that steel pipe is transversal
To on corresponding steel pipe side wall from diameter of steel tube 1/3~1/4 since steel pipe center top on face, the length of fluting is vertical along steel pipe
0.2~0.3m on side wall is welded to connect steel plate in slotting position, and the length of junction steel plate is that two adjacent steel pipes are opened between steel pipe
Spacing at slot is 0.4~0.8m, and the width of junction steel plate is the length of fluting, and adjacent steel pipe is fixedly connected by junction steel plate
Together, class beam type pipe curtain structure is formed；
(5) portal frame is set up
After waiting for fastener for connection, the soil body below pipe curtain is excavated, when excavating to pipe curtain position, sets up interim shaped steel branch
Support, and welded with steel pipe, portal frame is formed, makes all steel pipes in approximately the same plane；
(6) it constructs under pipe curtain
According to step (5), operation is repeated, completes the excavation of tunnel internal；
(7) tunnel floor is installed, installation, assembling reinforcement and concreting；
(8) tunnel sidewalls are installed, installation, assembling reinforcement and concreting；
(9) tunnel top is installed, installation, assembling reinforcement and concreting；
(10) temporary support and cleaning construction site are removed, building is carried out and builds by laying bricks or stones and fit up, completes Underground Construction, and
Each monitoring project is analyzed.
Compared with the prior art, the invention has the advantages that：
1, at the top of pipe curtain support system of the present invention and both sides form inverse u shape structural support frame using large-diameter circular steel pipe
Frame, the interior interval welding ribs of steel pipe is to increase steel pipe rigidity, then by being welded to connect steel plate at the fluting on steel pipe side wall
Adjacent steel pipe process is linked together, substantially increases its lateral stiffness and bearing capacity, and steel tube connecting way is relatively simple
It is single；
2, with construction progress, junction steel plate steel pipe below is cut, and portal frame is set up at welding steel, is formed
Initial supporting construction, builds agent structure on this basis, can build rectangular cross section, improve space availability ratio；
3, part shaped steel support replaces reinforcing bar, saves material, and easy for construction, simplifies working procedure, shortens construction work
Phase；
4, not high to the required precision of steel pipe jacking since steel pipe lower part needs to cut, difficulty of construction can be reduced.
Based on the above reasons, the present invention compares more traditional pipe-roofing method, is applied in shallow embedding single layer large span crossing project
Work has great advantage.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 is that the top push pipe of the pipe curtain support system inverse u shape support frame of the present invention heads into schematic diagram；
Fig. 2 is that the side push pipe of the pipe curtain support system inverse u shape support frame of the present invention heads into schematic diagram；
Fig. 3 is the pipe curtain support system inverse u shape support frame steel pipe periphery slip casting schematic diagram of the present invention；
Fig. 4 is that grouting hole structure schematic diagram is arranged in Fig. 3 on steel pipe side wall, and Fig. 4 (a) is steel pipe cross-sectional view, Fig. 4 (b)
For steel pipe side view；
Fig. 5 is structural schematic diagram after the pipe curtain support system steel-pipe welding ribs of the present invention；
Fig. 6 is the pipe curtain support system structural schematic diagram of the present invention being welded to connect after steel plate；
Fig. 7 is the partial enlarged view of Fig. 6 (without slip casting part)；
Fig. 8 is door type steel frame structure schematic diagram of the present invention；
Fig. 9 is the tunnel schematic diagram after bottom plate of the present invention installation；
Figure 10 is the tunnel schematic diagram after side wall of the present invention installation；
Figure 11 is the tunnel schematic diagram after the installation of top of the present invention；
Figure 12 is the tunnel schematic diagram that the present invention completes Underground Construction；
In figure：1, steel pipe, 2, semi-circular ribs, 3, junction steel plate, 4, portal frame, 5, injected hole.
Specific implementation mode
Technical scheme of the present invention is further described in detail with reference to example.
Embodiment 1
As shown in fig. 6, a kind of Shallow Large Span pipe curtain support system, top and both sides form to fall using large diameter steel pipe 1
U-typed support frame structure is typically chosen a diameter of 1.3~2.0m, the steel pipe that thickness is 14~22mm.
As shown in fig. 7,1~2m of interval welds semi-circular ribs 2 in steel pipe 1, to reinforce the stability of steel pipe 1, semicircle
The curvature of type ribs 2 and the curvature of steel pipe 1 are consistent, and the height of semi-circular ribs 2 is the 1/4~1/ of 1 diameter of steel pipe
5；
1 side wall of steel pipe is spaced 2m along 1 longitudinal direction of steel pipe and is provided with fluting, and slotting position is on 1 cross section of steel pipe from steel pipe
Center top starts on 1 side wall of corresponding steel pipe, the length of fluting is along 1 longitudinal side wall of steel pipe at diameter of steel tube 1/3~1/4
0.2~0.3m；
It is welded to connect steel plate 3 in slotting position, adjacent steel pipe 1 is fixed together by junction steel plate 3, between steel pipe 1
The length of junction steel plate 3 is the spacing at two adjacent steel pipes, 1 fluting, is 0.4~0.8m；The width of junction steel plate 3 is fluting
Length.
As shown in figure 4, interval setting injected hole 5, injected hole 5 are set on 1 side wall of steel pipe on the side wall of steel pipe 1 along longitudinal direction
The corresponding center of circle tilts 45 ° of position obliquely with horizontal direction, and the position on 1 side wall of steel pipe, which uses, to be symmetrical set,
The aperture of injected hole be 30~40mm, from injected hole 5 to 1 periphery slip casting of steel pipe, reduce 1 jack-in process of steel pipe in the periphery soil body
Frictional resistance.
The construction method of above-mentioned Shallow Large Span pipe curtain support system, steps are as follows：
(1) preparation of construction
According to design pipe curtain support system structure, determines the size and quantity of pipe curtain support system steel pipe 1, designing and constructing
Fender post is performed at position, is excavated starting well, is then performed Guan Liang and diagonal brace respectively, it is ensured that the stability of starting well waits originating
When well excavation reaches projected depth, place is arranged, counter force wall is set, sets up pipe jacking equipment；
(2) inverse u shape support frame steel pipe heads into
As shown in Figure 1, carrying out heading into for top steel pipe 1 first, carrying out jacking to both sides from centre sees；Side steel is carried out again
Pipe 1 heads into, as shown in Fig. 2, the 1 then jacking from the top down of lateral steel pipe；In 1 jack-in process of steel pipe, to reduce steel pipe 1 and periphery
The frictional resistance of the soil body need to carry out slip casting drag reduction, as shown in Figure 3 and Figure 4, by symmetrical on 1 side wall of steel pipe on 1 periphery of steel pipe
Injected hole 5 carry out symmetrical holes slip casing by pressure, grouting pressure is 0.5Mpa or so；It is unearthed in steel pipe and uses mechanical, horizontal spiral shell
Rotary drill or push-bench construction are automatic unearthed；
(3) the semi-circular ribs of setting in steel pipe
As shown in figure 5, in steel pipe after soil digging, semi-circular add is welded at the design position of 1~2m of interval in steel pipe 1
Strong rib 2, to reinforce the stability of steel pipe 1, the curvature and steel pipe 1 of semi-circular ribs 2 are consistent, semi-circular ribs 2
Height is 1 diameter 1/4~1/5 of steel pipe；
(4) it is welded to connect steel plate
As shown in Figure 6 and Figure 7, on 1 side wall of adjacent steel pipe, interval 2m is provided with fluting along 1 longitudinal side wall of steel pipe, opens
Groove location be on 1 cross section of steel pipe since steel pipe center top to from diameter of steel tube 1/3~1/4 on 1 side wall of corresponding steel pipe,
The length of fluting 0.2~0.3m along 1 longitudinal side wall of steel pipe is welded to connect steel plate 3 in slotting position, steel is connected between steel pipe 1
The length of plate 3 is the spacing at two adjacent steel pipes, 1 fluting, is 0.4~0.8m, and the width of junction steel plate 3 is the length of fluting；Even
It connects steel plate 3 to be fixed together adjacent steel pipe 1, forms class beam type pipe curtain structure；
(5) portal frame is set up
As shown in figure 8, after waiting for that steel pipe 1 connects, the soil body of 1 act of lower section of steel pipe is excavated, waits excavating and arrives pipe curtain steel pipe 1
When setting, 3 steel pipe 1 below of junction steel plate is cut, and the steel pipe 1 cut away is recycled；Then interim type steel support, shaped steel are set up
Can be H profile steel or other shaped steel, junction steel plate 3 is welded with interim type steel support, forms portal frame 4, top connection
Steel plate 3 is welded on portal frame 4, and left side junction steel plate 3 is welded in 4 left side of portal frame, and the right junction steel plate 3 is welded in
4 right side of portal frame, finally cuts the steel pipe of remaining lower part, makes all steel pipes 1 in approximately the same plane；
(6) it constructs under pipe curtain
According to step (5), operation is repeated, completes Underground Construction, completes the excavation of tunnel internal；
(7) tunnel floor is installed, installation, assembling reinforcement and concreting, as shown in Figure 9；
(8) tunnel sidewalls are installed, installation, assembling reinforcement and concreting, as shown in Figure 10；
(9) tunnel top is installed, installation, assembling reinforcement and concreting, as shown in figure 11；
(10) temporary support and cleaning construction site are removed, building is carried out and builds by laying bricks or stones and fit up, complete Underground Construction, such as
Shown in Figure 12, and each monitoring project is analyzed.
Embodiment 2
Shallow Large Span pipe curtain support system structure is with embodiment 1, and construction method, steps are as follows：
(1) preparation of construction
According to design pipe curtain support system structure, determines the size and quantity of pipe curtain support system steel pipe 1, designing and constructing
Fender post is performed at position, is excavated starting well, is then performed Guan Liang and diagonal brace respectively, it is ensured that the stability of starting well waits originating
When well excavation reaches projected depth, place is arranged, counter force wall is set, sets up pipe jacking equipment；
(2) inverse u shape support frame steel pipe heads into
As shown in Figure 1, carrying out heading into for top steel pipe 1 first, carrying out jacking to both sides from centre sees；Side steel is carried out again
Pipe 1 heads into, as shown in Fig. 2, the 1 then jacking from the top down of lateral steel pipe；In 1 jack-in process of steel pipe, to reduce steel pipe 1 and periphery
The frictional resistance of the soil body need to carry out slip casting drag reduction, as shown in Figure 3 and Figure 4, by symmetrical on 1 side wall of steel pipe on 1 periphery of steel pipe
Injected hole 5 carry out symmetrical holes slip casing by pressure, grouting pressure is 0.5Mpa or so；It is unearthed in steel pipe and uses mechanical, horizontal spiral shell
Rotary drill or push-bench construction are automatic unearthed；
(3) the semi-circular ribs of setting in steel pipe
As shown in figure 5, in steel pipe after soil digging, semi-circular add is welded at the design position of 1~2m of interval in steel pipe 1
Strong rib 2, to reinforce the stability of steel pipe 1, the curvature and steel pipe 1 of semi-circular ribs 2 are consistent, semi-circular ribs 2
Height is 1 diameter 1/4~1/5 of steel pipe；
(4) it is welded to connect steel plate
As shown in Figure 6 and Figure 7, on 1 side wall of adjacent steel pipe, interval 2m is provided with fluting along 1 longitudinal side wall of steel pipe, opens
Groove location be on 1 cross section of steel pipe since steel pipe center top to from diameter of steel tube 1/3~1/4 on 1 side wall of corresponding steel pipe,
The length of fluting is welded to connect steel plate 3 in slotting position, is connected between steel pipe 1 along the longitudinal upper 0.2~0.3m in 1 cross section of steel pipe
Spacing of the length of steel plate 3 between two adjacent steel pipes 1 at fluting is 0.4~0.8m, and the width of junction steel plate 3 is fluting
Length；Adjacent steel pipe 1 is fixed together by junction steel plate 3, forms class beam type pipe curtain structure；
(5) portal frame is set up
After waiting for that steel pipe 1 connects, the soil body below pipe curtain is excavated, when excavating to pipe curtain position, sets up interim shaped steel
Support, and welded with steel pipe 1, portal frame 4 is formed, makes all steel pipes 1 in approximately the same plane；
(6) it constructs under pipe curtain
According to step (5), operation is repeated, completes the excavation of tunnel internal；
(7) tunnel floor is installed, installation, assembling reinforcement and concreting, as shown in Figure 9；
(8) tunnel sidewalls are installed, installation, assembling reinforcement and concreting, as shown in Figure 10；
(9) tunnel top is installed, installation, assembling reinforcement and concreting, as shown in figure 11；
(10) temporary support and cleaning construction site are removed, building is carried out and builds by laying bricks or stones and fit up, complete Underground Construction, such as
Shown in Figure 12, and each monitoring project is analyzed.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of Shallow Large Span pipe curtain support system, top and both sides form inverse u shape support frame using large diameter steel pipe
Structure, which is characterized in that semi-circular ribs is arranged in interval in steel pipe, to reinforce the stability of steel pipe, semi-circular ribs and
Steel-pipe welding is fixed；Steel pipe side wall is arranged at intervals with fluting along steel pipe longitudinal direction, is welded to connect steel plate in slotting position, connects steel
Adjacent steel pipe is fixed together by plate.
2. a kind of Shallow Large Span pipe curtain support system according to claim 1, which is characterized in that between in the steel pipe
Every semi-circular ribs is arranged, the distance at interval is 1~2m.
3. a kind of Shallow Large Span pipe curtain support system according to claim 1 or 2, which is characterized in that the semicircle
The curvature of type ribs, curvature and steel pipe is consistent, and the height of semi-circular ribs is the 1/4~1/5 of diameter of steel tube.
4. a kind of Shallow Large Span pipe curtain support system according to claim 1, which is characterized in that the slotting position
For on steel pipe cross section since steel pipe center top on corresponding steel pipe side wall from diameter of steel tube 1/3~1/4.
5. a kind of Shallow Large Span pipe curtain support system according to claim 1 or 4, which is characterized in that the fluting
Length along steel pipe longitudinal side wall 0.2~0.3m, slot at interval of 2m along the steel pipe side wall of steel pipe longitudinal direction.
6. a kind of Shallow Large Span pipe curtain support system according to claim 1, which is characterized in that connect between the steel pipe
The length for connecing steel plate is the spacing at adjacent steel pipe fluting, is 0.4~0.8m；The width of junction steel plate is the length of fluting.
7. a kind of Shallow Large Span pipe curtain support system according to claim 1, which is characterized in that the steel pipe is along vertical
To side wall on interval setting injected hole, the injected hole, which is set on steel pipe side wall, correspond to the inclination of the center of circle and horizontal direction
45 ° of position obliquely, using being symmetrical set；The aperture of the injected hole is 30~40mm, from injected hole to steel
The slip casting of pipe periphery, reduces the frictional resistance with the periphery soil body during steel pipe jacking, the soil body in reinforcing pipe.
8. a kind of Shallow Large Span pipe curtain support system according to claim 1, which is characterized in that the steel pipe it is straight
Diameter is 1.3~2.0m, and thickness is 14~22mm.
9. a kind of construction method of Shallow Large Span pipe curtain support system, which is characterized in that steps are as follows：
(1) preparation of construction
According to design pipe curtain support system structure, the size and quantity of pipe curtain support system steel pipe are determined, in design and construction position
Place performs fender post, excavates starting well, then performs Guan Liang and diagonal brace respectively, it is ensured that the stability of starting well waits for that starting well is opened
When digging reaches projected depth, place is arranged, counter force wall is set, sets up pipe jacking equipment；
(2) inverse u shape support frame steel pipe heads into
Heading into for top steel pipe is carried out first, and jacking is carried out from centre to both sides；Heading into for side steel pipe, lateral steel pipe are carried out again
Then jacking from the top down during steel pipe jacking, to reduce the frictional resistance of steel pipe and the periphery soil body, need to be noted on steel pipe periphery
Drag reduction to be starched, symmetrical holes slip casing by pressure is carried out by symmetrical injected hole on steel pipe side wall, grouting pressure is 0.5Mpa or so,
It is unearthed in steel pipe and is unearthed automatically using mechanical, horizontal screw drilling or push-bench construction；
(3) the semi-circular ribs of setting in steel pipe
In steel pipe after soil digging, the semi-circular ribs of welding at the design position of 1~2m is spaced in steel pipe, to reinforce steel pipe
Stability, the curvature and steel pipe of semi-circular ribs is consistent, and the height of semi-circular ribs is diameter of steel tube 1/4~1/
5；
(4) it is welded to connect steel plate
On adjacent steel pipe side wall, it is spaced 2m along steel pipe longitudinal side wall and is provided with fluting, slotting position is on steel pipe cross section
To on corresponding steel pipe side wall from diameter of steel tube 1/3~1/4 since steel pipe center top, the length of fluting is along steel pipe longitudinal direction side
0.2~0.3m on wall is welded to connect steel plate in slotting position, and the length of junction steel plate is at adjacent steel pipe fluting between steel pipe
Spacing is 0.4~0.8m, and the width of junction steel plate is the length of fluting, and adjacent steel pipe is fixed together by junction steel plate,
Form class beam type pipe curtain structure；
(5) portal frame is set up
After waiting for fastener for connection, the soil body below pipe curtain is excavated, when excavating to pipe curtain position, cutting junction steel plate is below
Steel pipe, and the steel pipe cut away is recycled；Then interim type steel support is set up, and is welded with junction steel plate, gate-type is formed
Steelframe, top junction steel plate are welded on portal frame, and left side junction steel plate is welded on the left of portal frame, and the right connects steel
Plate is welded on the right side of portal frame；The steel pipe for finally cutting remaining lower part makes all steel pipes in approximately the same plane；
(6) it constructs under pipe curtain
According to step (5), operation is repeated, completes the excavation of tunnel internal；
(7) tunnel floor is installed, installation, assembling reinforcement and concreting；
(8) tunnel sidewalls are installed, installation, assembling reinforcement and concreting；
(9) tunnel top is installed, installation, assembling reinforcement and concreting；
(10) temporary support and cleaning construction site are removed, building is carried out and builds by laying bricks or stones and fit up, complete Underground Construction, and to each
Monitoring project is analyzed.
10. a kind of construction method of Shallow Large Span pipe curtain support system, which is characterized in that steps are as follows：
(1) preparation of construction
According to design pipe curtain support system structure, the size and quantity of pipe curtain support system steel pipe are determined, in design and construction position
Place performs fender post, excavates starting well, then performs Guan Liang and diagonal brace respectively, it is ensured that the stability of starting well waits for that starting well is opened
When digging reaches projected depth, place is arranged, counter force wall is set, sets up pipe jacking equipment；
(2) inverse u shape support frame steel pipe heads into
Heading into for top steel pipe is carried out first, and jacking is carried out from centre to both sides；Heading into for side steel pipe, lateral steel pipe are carried out again
Then jacking from the top down during steel pipe jacking, to reduce the frictional resistance of steel pipe and the periphery soil body, need to be noted on steel pipe periphery
Drag reduction to be starched, symmetrical holes slip casing by pressure is carried out by symmetrical injected hole on steel pipe side wall, grouting pressure is 0.5Mpa or so,
It is unearthed in steel pipe and is unearthed automatically using mechanical, horizontal screw drilling or push-bench construction；
(3) the semi-circular ribs of setting in steel pipe
In steel pipe after soil digging, the semi-circular ribs of welding at the design position of 1~2m is spaced in steel pipe, to reinforce steel pipe
Stability, the curvature and steel pipe of semi-circular ribs is consistent, and the height of semi-circular ribs is diameter of steel tube 1/4~1/
5；
(4) it is welded to connect steel plate
On adjacent steel pipe side wall, it is spaced 2m along steel pipe longitudinal side wall and is provided with fluting, slotting position is on steel pipe cross section
To on corresponding steel pipe side wall from diameter of steel tube 1/3~1/4 since steel pipe center top, the length of fluting is along steel pipe longitudinal direction side
0.2~0.3m on wall is welded to connect steel plate in slotting position, and the length of junction steel plate is at two adjacent steel pipe flutings between steel pipe
Spacing, be 0.4~0.8m, the width of junction steel plate be the length slotted, and adjacent steel pipe is fixedly connected on one by junction steel plate
It rises, forms class beam type pipe curtain structure；
(5) portal frame is set up
After waiting for fastener for connection, the soil body below pipe curtain is excavated, when excavating to pipe curtain position, sets up interim type steel support,
And welded with steel pipe, portal frame is formed, makes all steel pipes in approximately the same plane；
(6) it constructs under pipe curtain
According to step (5), operation is repeated, completes the excavation of tunnel internal；
(7) tunnel floor is installed, installation, assembling reinforcement and concreting；
(8) tunnel sidewalls are installed, installation, assembling reinforcement and concreting；
(9) tunnel top is installed, installation, assembling reinforcement and concreting；
(10) temporary support and cleaning construction site are removed, building is carried out and builds by laying bricks or stones and fit up, complete Underground Construction, and to each
Monitoring project is analyzed.
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| CN109372521A (en) * | 2018-11-22 | 2019-02-22 | 中铁十四局集团有限公司 | New pipe-roof method construction technology and construction pipe suspension device |
| CN109653772A (en) * | 2019-02-03 | 2019-04-19 | 东北大学 | A kind of shallow buried tube curtain support system and its construction method |
| CN109736814A (en) * | 2018-12-30 | 2019-05-10 | 中国铁建股份有限公司 | The construction method of pipe curtain section |
| CN110273696A (en) * | 2019-06-11 | 2019-09-24 | 中铁十四局集团第二工程有限公司 | A kind of tunnel or underground space claustra formula construction method |
| CN111502715A (en) * | 2020-05-29 | 2020-08-07 | 中铁第六勘察设计院集团有限公司 | Method for comprehensively constructing fractured rock mass in oversized underground cavern crossing stage |
| CN111911168A (en) * | 2020-09-04 | 2020-11-10 | 石家庄铁道大学 | Construction method of shallow-buried and underground-excavated large-span tunnel and permanent support system |
| CN113392563A (en) * | 2021-06-29 | 2021-09-14 | 石家庄铁道大学 | Pipe curtain prefabricated structure and design method thereof |
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| CN109372521A (en) * | 2018-11-22 | 2019-02-22 | 中铁十四局集团有限公司 | New pipe-roof method construction technology and construction pipe suspension device |
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| CN109653772B (en) * | 2019-02-03 | 2020-07-21 | 东北大学 | Shallow buried pipe curtain supporting system and construction method thereof |
| CN110273696A (en) * | 2019-06-11 | 2019-09-24 | 中铁十四局集团第二工程有限公司 | A kind of tunnel or underground space claustra formula construction method |
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| CN111502715B (en) * | 2020-05-29 | 2021-07-20 | 中铁第六勘察设计院集团有限公司 | Method for comprehensively constructing fractured rock mass in oversized underground cavern crossing stage |
| CN111911168A (en) * | 2020-09-04 | 2020-11-10 | 石家庄铁道大学 | Construction method of shallow-buried and underground-excavated large-span tunnel and permanent support system |
| CN113392563A (en) * | 2021-06-29 | 2021-09-14 | 石家庄铁道大学 | Pipe curtain prefabricated structure and design method thereof |
| CN113392563B (en) * | 2021-06-29 | 2023-04-25 | 石家庄铁道大学 | Pipe curtain pre-building structure and design method thereof |
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