CN106149733B - Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method - Google Patents
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method Download PDFInfo
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- CN106149733B CN106149733B CN201610651303.9A CN201610651303A CN106149733B CN 106149733 B CN106149733 B CN 106149733B CN 201610651303 A CN201610651303 A CN 201610651303A CN 106149733 B CN106149733 B CN 106149733B
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- tunnel
- square pile
- reinforcement cage
- wall
- steel reinforcement
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of tunnel immediately adjacent to bridge section deep foundation pit supporting structure, mainly including compositions such as tunnel, tunnel side buttress brace, cement soil wall, precast square pile, connection vertical tube, steel reinforcement cage, mould bag, support member, cast-in-place wallboard wall, side slope, horizontal bent cap, sizing leading truck, big cushion caps；The tunnel floor bottom is provided with tunnel side buttress brace, precast square pile and cast-in-place wallboard wall are provided with the outside of the big cushion cap, cast-in-place wallboard wall bottom is provided with cement soil wall, and construction leads wall and is provided with sizing leading truck, the side slope and faces upward slope and is provided with grouting rock bolt and in-network processing.The present invention has the characteristics of following and beneficial effect：The security and stability of tunnel immediately adjacent to bridge section deep foundation pit support are improved by tunnel side buttress brace, cement soil wall, cast-in-place wallboard wall etc., whole work progress is simple to operate, remarkable benefit.The tensile strength of cast-in-place wallboard wall can be improved by the mould bag on the outside of the stretch-draw anchor and steel reinforcement cage inside precast square pile.
Description
Technical field
The present invention relates to a kind of tunnel immediately adjacent to bridge section supporting construction and construction method, more particularly to a kind of tunnel immediately adjacent to bridge section depth base
Pit supporting construction and construction method, belong to Highway Municipal engineering.
Background technology
With the high speed development of China's economic, mountain area is increasingly goed deep into building for highway, and bridge tunnel ratio significantly increases
Add, tunnel immediately adjacent to bridge turns into one of new landscape of highway.Tunnel immediately adjacent to bridge section portal design section is small, and landform is more narrow, construction
Place is narrow, and line position is higher, and abutment is close to tunnel portal, and portal construction and beam slab set up more difficult.Tunnel immediately adjacent to bridge section depth base
During cheating excavation construction, the stabilization of face-upward slope and dark hole structure is affected greatly, it is necessary to take corresponding supporting to carry out
Strengthen, to ensure the stabilization and safety of tunnel exit face-upward slope, dark hole structure and foundation pit side-wall.
Existing tunnel exit Bridge-wire fusing time structure deep foundation pit supporting construction, employ fender post+miniature steel pipe pile and face
When anchor and spray net supporting scheme.Tunnel slope is used and gone along with sb. to guard him using general shotcrete reinforcing mode, tunnel immediately adjacent to bridge section with facing upward slope simultaneously
Stake supporting and retaining system, tunnel bottom use the support technology of miniature steel pipe pile grouting and reinforcing, pass through the tunnel immediately adjacent to bridge section tunnel for completion of constructing
Face-upward slope, the displacement of barrel and deformation monitoring, show that tunnel resistance to overturning and supporting effect are good.But such support pattern
Construct complex, fender post quantity is more, and the construction period is longer.
In consideration of it, in order to improve the security and stability of tunnel immediately adjacent to bridge section foundation ditch, it would be highly desirable to which invention is a kind of simple and effective
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method, improve the construction quality and efficiency of construction of tunnel immediately adjacent to bridge section.
The content of the invention
It is an object of the invention to improve the security and stability of tunnel immediately adjacent to bridge section foundation ditch, there is preferable Technological Economy
Benefit.
To achieve the above object, present invention employs following technical scheme：
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure, it is characterised in that the structure mainly include tunnel, tunnel side buttress brace,
Cement soil wall, precast square pile, connection vertical tube, steel reinforcement cage, mould bag, support member, cast-in-place wallboard wall, side slope, horizontal bent cap, sizing are led
Formed to frame, big cushion cap etc.；The tunnel floor bottom is provided with tunnel side buttress brace, be provided with the outside of the big cushion cap precast square pile with
Cast-in-place wallboard wall, cast-in-place wallboard wall bottom are provided with cement soil wall, and construction leads wall and is provided with sizing leading truck, the side slope and face upward slope
Provided with grouting rock bolt and in-network processing.
Further, tunnel side buttress brace is followed by horizontal bar close to precast square pile side is pre-buried.
Precast square pile is provided with and shelves groove, and corner precast square pile is provided with three grooves, and remaining precast square pile is provided with two grooves, set in groove
There is connection vertical tube, entirely shelve groove and be provided with grouting behind shaft or drift lining body, bottom is provided with vertical tube fixed plate, and bottom plate is provided with pre-buried connection end, in advance
Square pile side processed is provided with horizontal connecting hole, and horizontal screw bolt is set in hole, steel pipe support, precast square pile top are provided between precast square pile
Portion is provided with horizontal bent cap, and screw rod connection end is provided with being followed by horizontal bar correspondence position.
Anchor cable is provided with inside connection vertical tube, top is provided with top fixing element, is provided with anchor cable junction steel plate at the top of anchor cable, anyhow
Key is fitted together to steel plate is provided between steel plate, connection vertical tube bottom is provided with injected hole, geotextiles are laid outside hole.
Portion sets steel reinforcement cage to cast-in-place wallboard within the walls, and steel reinforcement cage bottom is provided with steel reinforcement cage bottom plate, and bottom plate pre-embedded bolt, side is set
There is mould bag, set support member to be fixed on steel reinforcement cage on the inside of mould bag, bottom coordinates nut to be fixed on steel reinforcement cage bottom plate with L-type pressing plate
On.
Steel reinforcement cage is provided with horizontal stiffener, and horizontal stiffener end is provided with the bar connecting collar, in the bar connecting collar
Connection vertical tube is set.
The present invention also provides the construction method of tunnel immediately adjacent to bridge section deep foundation pit supporting structure, it is characterised in that including following step
Suddenly：
1) construction tunnel side buttress brace：Excavated in the tunnel floor bottom constructed, rear formwork is poured, and side is reserved to be followed by
Horizontal bar, then set up sizing leading truck；
2) construction cement soil wall：Stirring or slot grooving cement soil wall after the completion of excavation of foundation pit.
3) banding steel cage：According to design requirement banding steel cage, then every 30~50cm colligation horizontal stiffeners, water
The flat reinforcement end welded reinforcement connection collar, while every 50~100cm colligation support members；
4) mould bag is set：Mould bag, mould bag and support member colligation are inserted on the outside of steel reinforcement cage, bottom is inserted on steel reinforcement cage bottom plate
Pre-embedded bolt in, and with L-type pressing plate coordinate nut tighten fixation.
5) it is implanted into precast square pile：The fixed connection vertical tube with anchor cable, then plays precast square pile on pre-buried connection end
Implantation is hung, welded still pipe supports between two precast square piles after implantation；
6) tunnel side buttress brace is connected with precast square pile：Reserved on precast square pile reserved horizontal screw bolt and tunnel side buttress brace
It is followed by horizontal bar welding；
7) cast-in-place wallboard wall is poured：Steel reinforcement cage is lifted by crane, makes reinforcing bar connected set ring control steel reinforcement cage to hang down in real time through connection vertical tube
Straight degree and position, concrete is filled when inserting steel reinforcement cage；
8) fixed anchor cable：After anchorage cable stretching, mortar is injected into connection vertical tube, is connected as anchor cable with anchor cable junction steel plate
It is overall, vertically and horizontally between key be fitted together to by steel plate interlocked；
9) construction level bent cap：Formwork pours horizontal bent cap at the top of precast square pile；
10) slope construction and slope is faced upward：Construction grouting rock bolt and in-network processing form bank protection.
The present invention has the characteristics of following and beneficial effect：
(1) present invention improves tunnel immediately adjacent to bridge section deep pit support by tunnel side buttress brace, cement soil wall, cast-in-place wallboard wall etc.
The security and stability of shield, whole work progress is simple to operate, remarkable benefit.
(2) the anti-of cast-in-place wallboard wall can be improved by the mould bag on the outside of the stretch-draw anchor and steel reinforcement cage inside precast square pile
Tensile strength.
(3) steel reinforcement cage side sets horizontal stiffener, the horizontal stiffener end set bar connecting collar, and the collar is inserted in company
Vertical tube is connect, the globality of cast-in-place wallboard wall can be increased.
Brief description of the drawings
Fig. 1 is tunnel immediately adjacent to bridge section deep foundation pit supporting structure plan of the present invention；
Fig. 2 is tunnel immediately adjacent to bridge section profile of the present invention；
Fig. 3 is tunnel immediately adjacent to bridge section sectional side view of the present invention；
Fig. 4 is tunnel side buttress brace and precast square pile connection figure；
Fig. 5 is the slot structure figure of precast square pile two of the present invention；
Fig. 6 is the slot structure figure of precast square pile three of the present invention；
Fig. 7 is reinforcement cage structure schematic diagram of the present invention；
Fig. 8 is enlarged drawing in Fig. 7 circles；
Fig. 9 is steel reinforcement cage of the present invention with being connected vertical tube connection figure；
Figure 10 is Fig. 2 partial enlarged drawing；
Figure 11 is Fig. 3 partial enlarged drawing；
Wherein：1. the tunnel side buttress brace 3. of tunnel 2. is followed by the precast square pile 6. of 4. cement soil wall of horizontal bar 5. and shelves groove
7. connect 8. injected hole of vertical tube, 9. anchor cable, 10. vertical tube fixed plate, the 11. pre-buried reinforcing bar of 12. grouting behind shaft or drift lining body of connection end 13. to connect
16. mould bag of female connector ring 14. steel reinforcement cage, 15. top fixing element, 17. support member, the 18. cast-in-place anchor cable of wallboard wall 19. connection steel
It is mixed that the horizontal bent cap 21. of plate 20. leads 23. nut, the 24. big grouting rock bolt 26. of the cushion cap 25. net sprays of the sizing of wall 22. leading truck
The water of 27. screw rod connection end of solidifying soil, 28. connecting screw, 29. steel pipe support, 30. steel reinforcement cage bottom plate, 31. horizontal connecting hole 32.
The flat pre-embedded bolt 35.L type pressing plates of 33. horizontal stiffener of screw rod 34..
Embodiment
Formwork erection technical requirements, concrete pouring construction technical requirements, Reinforcement binding technique requirement etc., the present invention is no longer
Tired to state, emphasis illustrates that the present invention relates to the embodiment of structure.
As shown in Figures 1 to 3, tunnel immediately adjacent to bridge section deep foundation pit supporting structure, mainly by the tunnel of 6m internal diameters, 1.5m, high 8m is wide
Tunnel side buttress brace, cement soil wall, external diameter 2m precast square pile, diameter 25mm connection vertical tube, steel reinforcement cage, thickness 5mm mould bag,
The thick cast-in-place wallboard wall of 3mm steel plates support member, 1.8m, side slope, horizontal bent cap, diameter 48mm sizing leading truck, big cushion cap etc.
Composition；Tunnel floor bottom is provided with tunnel side buttress brace, and precast square pile and cast-in-place wallboard wall are provided with the outside of 8m × 8m big cushion cap, existing
Pour wallboard wall bottom and be provided with cement soil wall, construction leads wall and is provided with sizing leading truck, the side slope and faces upward the mortar that slope is provided with 4m
The anchor pole in-network processing thick with 10cm.Portion sets steel reinforcement cage to cast-in-place wallboard within the walls, and it is thick that steel reinforcement cage bottom is provided with steel reinforcement cage bottom plate
3mm, the pre-buried 20mm bolts of bottom plate are spent, side is provided with mould bag, sets support member to be fixed on steel reinforcement cage on the inside of mould bag, bottom is thick
Degree 3mm L-type pressing plate coordinates nut to be fixed on steel reinforcement cage bottom plate.
As shown in figure 4, tunnel side buttress brace is followed by horizontal bar close to the pre-buried diameter 20mm in precast square pile side.Precast square pile with
It is followed by the screw rod connection end that horizontal bar correspondence position is provided with length 20cm, being connected with screw rod by being followed by horizontal bar when both connect
Connection is completed in end welding.
As shown in Fig. 5~6, precast square pile be provided with 60cm it is wide shelve groove, corner precast square pile is provided with three grooves, and remaining is pre-
Square pile processed is provided with two grooves, and connection vertical tube is provided with groove, groove is entirely shelved and is provided with grouting behind shaft or drift lining body, and grouting behind shaft or drift lining body is C30 cement mortar,
Bottom is provided with vertical tube fixed plate, and bottom plate is 3mm steel plates, and bottom plate is provided with pre-buried connection end, and precast square pile side is provided with level
Connecting hole, aperture 22mm set horizontal screw bolt in hole, screw diameter 20mm, and diameter 48mm steel pipe is provided between precast square pile
Support, precast square pile top are provided with wide 2mm, thickness 1m horizontal bent cap, length 20cm are provided with being followed by horizontal bar correspondence position
Screw rod connection end.
The anchor cable that diameter 2mm is provided with inside vertical tube is connected, top is provided with 3mm steel plate top fixing elements, is provided with the top of anchor cable
Anchor cable junction steel plate, thickness 3mm, anyhow to the chimeric key of steel plate is provided between steel plate, connection vertical tube bottom is provided with injected hole, aperture
10mm, geotextiles are laid outside hole.
As shown in fig. 7, steel reinforcement cage is provided with diameter 18mm horizontal stiffener, reinforcement end is provided with reinforced bar jointing sleeve
Ring, the collar are made up of diameter 10mm reinforcing bar, and connection vertical tube is set in the collar.
Claims (5)
1. tunnel immediately adjacent to bridge section deep foundation pit supporting structure, it is characterised in that mainly by tunnel (1), tunnel side buttress brace (2), soil cement
Wall (4), precast square pile (5), connection vertical tube (7), steel reinforcement cage (14), mould bag (16), support member (17), cast-in-place wallboard wall (18),
Side slope, horizontal bent cap (20), sizing leading truck (22) and big cushion cap (24) composition；Tunnel (1) the bottom plate bottom is provided with tunnel side
Buttress brace (2), is provided with precast square pile (5) and cast-in-place wallboard wall (18) on the outside of the big cushion cap (24), under cast-in-place wallboard wall (18)
Portion is provided with cement soil wall (4), and construction leads wall (21) and is provided with sizing leading truck (22), the side slope and faces upward slope and is provided with grouting rock bolt
(25) with in-network processing (26)；Described tunnel side buttress brace (2) is followed by horizontal bar (3) close to precast square pile (5) side is pre-buried；In advance
Square pile (5) processed is provided with and shelves groove (6), and corner precast square pile (5) is provided with three grooves, and remaining precast square pile (5) is provided with two grooves, in groove
Provided with connection vertical tube (7), entirely shelve groove (6) and be provided with grouting behind shaft or drift lining body (12), bottom is provided with vertical tube fixed plate (10), set on bottom plate
There is pre-buried connection end (11), precast square pile (5) side is provided with horizontal connecting hole (31), and horizontal screw bolt (32) is set in hole, prefabricated
Steel pipe support (29) is provided between square pile (5), horizontal bent cap (20) is provided with the top of precast square pile (5), it is right with being followed by horizontal bar (3)
Position is answered to be provided with screw rod connection end (27).
2. tunnel immediately adjacent to bridge section deep foundation pit supporting structure according to claim 1, it is characterised in that described connection vertical tube (7)
Inside is provided with anchor cable, and top is provided with top fixing element (15), and anchor cable top is provided with anchor cable junction steel plate (19), anyhow to steel plate it
Between be provided with steel plate be fitted together to key, connection vertical tube (7) bottom be provided with injected hole (8), lay geotextiles outside hole.
3. tunnel immediately adjacent to bridge section deep foundation pit supporting structure according to claim 1, it is characterised in that described cast-in-place wallboard wall
(18) internal to set steel reinforcement cage (14), steel reinforcement cage (14) bottom is provided with steel reinforcement cage bottom plate (30), and bottom plate is provided with pre-embedded bolt (34),
Side is provided with mould bag (16), sets support member (17) to be fixed on steel reinforcement cage (14) on the inside of mould bag (16), bottom L-type pressing plate
(35) nut (23) is coordinated to be fixed on steel reinforcement cage bottom plate (30).
4. tunnel immediately adjacent to bridge section deep foundation pit supporting structure according to claim 1, it is characterised in that on the steel reinforcement cage (14)
Provided with horizontal stiffener (33), horizontal stiffener (33) end is provided with the bar connecting collar (13), and the bar connecting collar (13) is interior
Connection vertical tube (7) is set.
5. the construction method of tunnel immediately adjacent to bridge section deep foundation pit supporting structure as claimed in claim 1, it is characterised in that including following
Step：
1) construction tunnel side buttress brace (2)：Excavated in the tunnel floor bottom constructed, rear formwork is poured, and side is reserved to be followed by
Horizontal bar (3), then set up sizing leading truck (22)；
2) construction cement soil wall (4)：Stirring or slot grooving cement soil wall (4) after the completion of excavation of foundation pit；
3) banding steel cage (14)：According to design requirement banding steel cage (14), then every the horizontal reinforcement of 30~50cm colligations
Muscle (33), horizontal stiffener (33) end welded reinforcement connection collar (13), while every 50~100cm colligation support members
(17)；
4) mould bag (16) is set：Mould bag (16), mould bag (16) and support member (17) colligation, bottom are inserted on the outside of steel reinforcement cage (14)
It is inserted in the pre-embedded bolt (34) on steel reinforcement cage (14) bottom plate, and coordinates nut (23) to tighten fixation with L-type pressing plate (35)；
5) it is implanted into precast square pile (5)：The fixed connection vertical tube (7) with anchor cable (9) on pre-buried connection end (11), then will be pre-
Square pile (5) lifting implantation processed, welded still pipe support (29) between two precast square piles (5) after implantation；
6) tunnel side buttress brace (2) is connected with precast square pile (5)：The reserved horizontal screw bolt (32) of precast square pile (5) is strengthened with tunnel side
That is reserved on beam (2) is followed by horizontal bar (3) welding；
7) cast-in-place wallboard wall (18) is poured：Steel reinforcement cage (14) is lifted by crane, makes reinforcing bar connected set ring (13) through vertical tube (7) is connected, in real time
Steel reinforcement cage (14) perpendicularity and position are controlled, concrete is filled when inserting steel reinforcement cage (14)；
8) fixed anchor cable (9)：After anchor cable (9) tensioning, the injection mortar into connection vertical tube (7) will with anchor cable junction steel plate (19)
Anchor cable (9) is connected as entirety, vertically and horizontally between by steel plate be fitted together to key interlock；
9) construction level bent cap (20)：Formwork pours horizontal bent cap (20) at the top of precast square pile (5)；
10) slope construction and slope is faced upward：Construction grouting rock bolt (25) and in-network processing (26) form bank protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610651303.9A CN106149733B (en) | 2016-08-10 | 2016-08-10 | Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610651303.9A CN106149733B (en) | 2016-08-10 | 2016-08-10 | Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106149733A CN106149733A (en) | 2016-11-23 |
| CN106149733B true CN106149733B (en) | 2017-12-22 |
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ID=57329604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610651303.9A Active CN106149733B (en) | 2016-08-10 | 2016-08-10 | Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951652B (en) * | 2018-08-08 | 2020-08-14 | 黑龙江龙捷市政轨道交通工程有限公司 | Bridge-tunnel connection section deep foundation pit supporting structure and construction method |
| CN109113069A (en) * | 2018-08-08 | 2019-01-01 | 武岳 | Precipitous section tunnel immediately adjacent to bridge foundation pit support device and construction method |
| CN108824451B (en) * | 2018-08-29 | 2019-09-03 | 武岳 | Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method |
| CN114197452B (en) * | 2021-12-18 | 2023-03-03 | 杭州森竹建设工程有限公司 | Post-grouting prestressed hollow square pile and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009174178A (en) * | 2008-01-24 | 2009-08-06 | Kajima Corp | Method of constructing underground structure |
| CN105133664A (en) * | 2015-08-26 | 2015-12-09 | 济南轨道交通集团有限公司 | Combined frame type isolation protection system and construction method thereof |
| CN206052727U (en) * | 2016-08-10 | 2017-03-29 | 浙江大学城市学院 | Tunnel immediately adjacent to bridge section deep foundation pit supporting structure |
-
2016
- 2016-08-10 CN CN201610651303.9A patent/CN106149733B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009174178A (en) * | 2008-01-24 | 2009-08-06 | Kajima Corp | Method of constructing underground structure |
| CN105133664A (en) * | 2015-08-26 | 2015-12-09 | 济南轨道交通集团有限公司 | Combined frame type isolation protection system and construction method thereof |
| CN206052727U (en) * | 2016-08-10 | 2017-03-29 | 浙江大学城市学院 | Tunnel immediately adjacent to bridge section deep foundation pit supporting structure |
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| CN106149733A (en) | 2016-11-23 |
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