CN106149733A - 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 PDF

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Publication number
CN106149733A
CN106149733A CN201610651303.9A CN201610651303A CN106149733A CN 106149733 A CN106149733 A CN 106149733A CN 201610651303 A CN201610651303 A CN 201610651303A CN 106149733 A CN106149733 A CN 106149733A
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China
Prior art keywords
tunnel
reinforcement cage
square pile
precast square
bridge
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CN201610651303.9A
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Chinese (zh)
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CN106149733B (en
Inventor
王新泉
崔允亮
张世民
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浙江大学城市学院
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The present invention relates to a kind of tunnel immediately adjacent to bridge section deep foundation pit supporting structure, mainly include tunnel, tunnel limit 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, the sizing composition such as leading truck, big cushion cap;Described tunnel floor bottom is provided with tunnel limit buttress brace, precast square pile and cast-in-place wallboard wall it is provided with outside described big cushion cap, cast-in-place wallboard wall bottom is provided with cement soil wall, and construction is led wall and is provided with sizing leading truck, described side slope and face upward slope and be provided with grouting rock bolt and in-network processing.The present invention has following feature and beneficial effect: improved safety and the stability of tunnel immediately adjacent to bridge section deep foundation pit support by tunnel limit 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 stretch-draw anchor within precast square pile and the mould bag outside steel reinforcement cage.

Description

Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method
Technical field
The present invention relates to a kind of tunnel immediately adjacent to bridge section supporting construction and construction method, particularly to a kind of deep base of tunnel immediately adjacent to bridge section Pit supporting construction and construction method, belong to Highway Municipal engineering.
Background technology
Along with the high speed development of China's economic, mountain area is goed deep in building of highway day by day, and bridge tunnel ratio significantly increases Adding, tunnel immediately adjacent to bridge becomes one new landscape of highway.Tunnel immediately adjacent to bridge section portal design section is little, and landform is the narrowest, construction Place is narrow, and line position is higher, and tunnel portal is close to by abutment, and portal construction and beam slab set up more difficulty.The deep base of tunnel immediately adjacent to bridge section During the excavation construction of hole, face-upward slope and dark hole structure are stablized and affects greatly, need to take corresponding supporting to carry out Strengthen, to guarantee the stable of tunnel exit face-upward slope, dark hole structure and foundation pit side-wall and safety.
Existing tunnel exit Bridge-wire fusing time structure deep foundation pit supporting construction, have employed fender post+miniature steel pipe pile and faces Time anchor and spray net supporting scheme.Tunnel slope uses the employing of general shotcrete reinforcing mode, tunnel immediately adjacent to bridge section to go along with sb. to guard him with facing upward slope simultaneously Stake gear, tunnel bottom uses the support technology of miniature steel pipe pile grouting and reinforcing, the tunnel immediately adjacent to bridge section tunnel completed by construction Face-upward slope, the displacement of barrel and deformation monitoring, display tunnel stability in the large and supporting effect are good.But this type of support pattern Constructing complex, fender post quantity is more, and the construction period is longer.
In consideration of it, for the safety and the stability that improve tunnel immediately adjacent to bridge section foundation ditch, it would be highly desirable to invention is a kind of simple and effective Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method, improve construction quality and the efficiency of construction of tunnel immediately adjacent to bridge section.
Summary of the invention
It is an object of the invention to improve safety and the stability of tunnel immediately adjacent to bridge section foundation ditch, there is preferable Technological Economy Benefit.
For achieving the above object, present invention employs techniques below scheme:
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure, it is characterised in that described structure mainly include tunnel, tunnel limit 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 Form to frame, big cushion cap etc.;Described tunnel floor bottom is provided with tunnel limit buttress brace, be provided with outside described big cushion cap precast square pile with Cast-in-place wallboard wall, cast-in-place wallboard wall bottom is provided with cement soil wall, and construction is led wall and is provided with sizing leading truck, described side slope and face upward slope It is provided with grouting rock bolt and in-network processing.
Further, tunnel limit buttress brace is followed by horizontal bar near precast square pile side is pre-buried.
Precast square pile is provided with shelves groove, and corner precast square pile is provided with three grooves, and remaining precast square pile is provided with two grooves, sets in groove Having connection vertical tube, whole groove of shelving to be provided with grouting behind shaft or drift lining body, bottom is provided with vertical tube and fixes base plate, and base plate is provided with pre-buried connection end, Precast square pile side is provided with horizontal connecting hole, arranges horizontal screw bolt in hole, is provided with steel pipe support, precast square pile between precast square pile Top is provided with horizontal bent cap, is provided with screw rod is connected end with being followed by horizontal bar correspondence position.
Connecting and be provided with anchor cable inside vertical tube, top is provided with top fixing element, and anchor cable top is provided with anchor cable junction steel plate, anyhow Between steel plate, it is provided with steel plate is fitted together to key, connect vertical tube bottom and be provided with injected hole, outside hole, lay geotextiles.
Cast-in-place wallboard portion within the walls arranges steel reinforcement cage, is provided with steel reinforcement cage base plate, base plate pre-embedded bolt bottom steel reinforcement cage, and side sets Having mould bag, arrange support member and be fixed on steel reinforcement cage inside mould bag, bottom L-type pressing plate coordinates nut to be fixed on steel reinforcement cage base 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 for the construction method of tunnel immediately adjacent to bridge section deep foundation pit supporting structure, it is characterised in that include following step Rapid:
1) construction tunnel limit buttress brace: at the tunnel floor bottom excavation constructed, rear formwork pours, side is reserved to be followed by Horizontal bar, sets up sizing leading truck subsequently;
2) construction cement soil wall: excavation of foundation pit stirs or slot grooving cement soil wall after completing.
3) assembling reinforcement cage: require assembling reinforcement cage according to design, subsequently every 30~50cm colligation horizontal stiffeners, water Flat reinforcement end welded reinforcement connects the collar, simultaneously every 50~100cm colligation support members;
4) mould bag is set: being inserted in mould bag, mould bag and support member colligation outside steel reinforcement cage, bottom is inserted on steel reinforcement cage base plate Pre-embedded bolt in, and with L-type pressing plate coordinate nut tighten fixing.
5) implant precast square pile: the fixing connection vertical tube with anchor cable on pre-buried connection end, subsequently precast square pile is risen Hanging implantation, after implantation, between two precast square piles, welded still pipe supports;
6) tunnel limit buttress brace is connected with precast square pile: precast square pile reserved horizontal screw bolt is reserved with on the buttress brace of tunnel limit It is followed by horizontal bar welding;
7) pour cast-in-place wallboard wall: lifting steel reinforcement cage, make reinforcing bar connected set ring through connecting vertical tube, control steel reinforcement cage in real time and hang down Straight degree and position, while insert steel reinforcement cage limit to fill concrete;
8) fixing anchor cable: after anchorage cable stretching, injects mortar within connecting vertical tube, is connected as by anchor cable with anchor cable junction steel plate Entirety, vertically and horizontally between by steel plate be fitted together to key interlock;
9) construction level bent cap: formwork pours horizontal bent cap at precast square pile top;
10) slope construction and face upward slope: construction grouting rock bolt and in-network processing form bank protection.
The present invention has following feature and a beneficial effect:
(1) present invention improves tunnel immediately adjacent to bridge section deep pit support by tunnel limit buttress brace, cement soil wall, cast-in-place wallboard wall etc. The safety protected and stability, whole work progress is simple to operate, remarkable benefit.
(2) the anti-of cast-in-place wallboard wall can be improved by the stretch-draw anchor within precast square pile and the mould bag outside steel reinforcement cage Tensile strength.
(3) steel reinforcement cage side arranges horizontal stiffener, and horizontal stiffener end arranges the bar connecting collar, and the collar is inserted in even Connect vertical tube, the globality of cast-in-place wallboard wall can be increased.
Accompanying drawing explanation
Fig. 1 is tunnel immediately adjacent to bridge section deep foundation pit supporting structure plane graph 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 that tunnel limit buttress brace is connected figure with precast square pile;
Fig. 5 is precast square pile two groove structure chart of the present invention;
Fig. 6 is precast square pile three groove structure chart of the present invention;
Fig. 7 is reinforcement cage structure schematic diagram of the present invention;
Fig. 8 is enlarged drawing in Fig. 7 circle;
Fig. 9 is steel reinforcement cage of the present invention and be connected vertical tube connection figure;
Figure 10 is the partial enlarged drawing of Fig. 2;
Figure 11 is the partial enlarged drawing of Fig. 3;
Wherein: 1. tunnel limit, tunnel 2. buttress brace 3. is followed by horizontal bar 4. cement soil wall 5. precast square pile 6. and shelves groove 7. connect pre-buried connection end 12. grouting behind shaft or drift lining body 13. bar connecting of vertical tube 8. injected hole 9. anchor cable 10. vertical tube fixed plate 11. The collar 14. cast-in-place wallboard wall 19. anchor cable junction steel plate of steel reinforcement cage 15. top fixing element 16. mould bag 17. support member 18. 20. horizontal bent caps 21. are led wall 22. and are shaped leading truck 23. nut 24. big cushion cap 25. grouting rock bolt 26. in-network processing 27. screw rods connect end 28. and connect screw rod 29. steel pipe support 30. steel reinforcement cage base plate 31. horizontal connecting hole 32. horizontal screw bolt 33. horizontal stiffener 34. pre-embedded bolt 35.L type pressing plates.
Detailed description of the invention
Formwork erection technology requirement, concrete pouring construction technology requirement, Reinforcement binding technique requirement etc., the present invention is no longer Tiring out and state, emphasis illustrates the embodiment that the present invention relates to structure.
As shown in Figures 1 to 3, tunnel immediately adjacent to bridge section deep foundation pit supporting structure, mainly wide by the tunnel of 6m internal diameter, 1.5m height 8m Tunnel limit buttress brace, cement soil wall, the precast square pile of external diameter 2m, diameter 25mm connect vertical tube, steel reinforcement cage, the mould bag of thickness 5mm, 3mm steel plate support member, 1.8m thick cast-in-place wallboard wall, side slope, horizontal bent cap, the sizing leading truck of diameter 48mm, big cushion cap etc. Composition;Tunnel floor bottom is provided with tunnel limit buttress brace, is provided with precast square pile and cast-in-place wallboard wall outside the big cushion cap of 8m × 8m, existing Watering wallboard wall bottom and be provided with cement soil wall, construction is led wall and is provided with sizing leading truck, described side slope and face upward slope and be provided with the mortar of 4m The in-network processing that anchor pole is thick with 10cm.Cast-in-place wallboard portion within the walls arranges steel reinforcement cage, is provided with steel reinforcement cage base plate thick bottom steel reinforcement cage Degree 3mm, base plate pre-buried 20mm bolt, side is provided with mould bag, arranges support member and be fixed on steel reinforcement cage inside mould bag, and bottom is thick The L-type pressing plate of degree 3mm coordinates nut to be fixed on steel reinforcement cage base plate.
As shown in Figure 4, tunnel limit buttress brace is followed by horizontal bar near precast square pile side pre-buried diameter 20mm.Precast square pile with It is followed by horizontal bar correspondence position to be provided with the screw rod of length 20cm and connect end, is connected with screw rod by being followed by horizontal bar when both connect End welding completes to connect.
As shown in Fig. 5~6, precast square pile be provided with 60cm wide shelve groove, corner precast square pile is provided with three grooves, and remaining is pre- Square pile processed is provided with two grooves, is provided with connection vertical tube in groove, and whole groove of shelving 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 and fixes base plate, and base plate is 3mm steel plate, and base plate is provided with pre-buried connection end, and precast square pile side is provided with water Flat connecting hole, aperture 22mm, horizontal screw bolt, screw diameter 20mm are set in hole, between precast square pile, are provided with the steel of diameter 48mm Pipe supports, and precast square pile top is provided with the horizontal bent cap of wide 2mm, thickness 1m, is provided with length with being followed by horizontal bar correspondence position The screw rod of 20cm connects end.
Connecting the anchor cable being provided with diameter 2mm inside vertical tube, top is provided with 3mm steel plate top fixing element, and anchor cable top is provided with Anchor cable junction steel plate, thickness 3mm, between steel plate, anyhow it is provided with steel plate is fitted together to key, connect vertical tube bottom and be provided with injected hole, aperture 10mm, lays geotextiles outside hole.
As it is shown in fig. 7, steel reinforcement cage is provided with the horizontal stiffener of diameter 18mm, reinforcement end is provided with reinforced bar jointing sleeve Ring, the collar is made up of the reinforcing bar of diameter 10mm, arranges connection vertical tube in the collar.

Claims (7)

1. tunnel immediately adjacent to bridge section deep foundation pit supporting structure, it is characterised in that main by tunnel (1), tunnel limit buttress brace (2), soil cement Wall (4), precast square pile (5), connect 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;Described tunnel (1) base plate bottom is provided with tunnel limit Buttress brace (2), described big cushion cap (24) outside is provided with precast square pile (5) and cast-in-place wallboard wall (18), under cast-in-place wallboard wall (18) Portion is provided with cement soil wall (4), and construction is led wall (21) and is provided with sizing leading truck (22), described side slope and face upward slope and be provided with grouting rock bolt (25) with in-network processing (26).
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure the most according to claim 1, it is characterised in that described tunnel limit buttress brace (2) it is followed by horizontal bar (3) near precast square pile (5) side is pre-buried.
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure the most according to claim 1, it is characterised in that precast square pile (5) is provided with to be put Putting groove (6), corner precast square pile (5) is provided with three grooves, and remaining precast square pile (5) is provided with two grooves, is provided with connection vertical tube in groove (7), whole groove (6) of shelving is provided with grouting behind shaft or drift lining body (12), and bottom is provided with vertical tube and fixes base plate (10), and base plate is provided with pre-buried connection End (11), precast square pile (5) side is provided with horizontal connecting hole (31), arranges horizontal screw bolt (32), between precast square pile (5) in hole Being provided with steel pipe support (29), precast square pile (5) top is provided with horizontal bent cap (20), is provided with being followed by horizontal bar (3) correspondence position Screw rod connects end (27).
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure the most 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 (16), and anchor cable top is provided with anchor cable junction steel plate (20), anyhow to steel plate (10) it is provided with steel plate between and is fitted together to key, connect vertical tube (7) bottom and be provided with injected hole (8), outside hole, lay geotextiles.
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure the most according to claim 1, it is characterised in that described cast-in-place wallboard wall (18) the internal steel reinforcement cage (14) that arranges, steel reinforcement cage (14) bottom is provided with steel reinforcement cage base plate (30), and base plate is provided with pre-embedded bolt (34), Side is provided with mould bag (16), and mould bag (16) inner side arranges support member (17) and is fixed on steel reinforcement cage (14), bottom L-type pressing plate (35) nut (23) is coordinated to be fixed on steel reinforcement cage base plate (30).
Tunnel immediately adjacent to bridge section deep foundation pit supporting structure the most according to claim 1, it is characterised in that on described steel reinforcement cage (14) Being provided with horizontal stiffener (33), horizontal stiffener (33) end is provided with the bar connecting collar (13), in the bar connecting collar (13) Connection vertical tube (7) is set.
7. 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 include following Step:
1) construction tunnel limit buttress brace (2): at the tunnel floor bottom excavation constructed, rear formwork pours, side is reserved to be followed by Horizontal bar (3), sets up sizing leading truck (22) subsequently;
2) construction cement soil wall (4): excavation of foundation pit stirs or slot grooving cement soil wall (4) after completing;
3) assembling reinforcement cage (14): require assembling reinforcement cage (14) according to design, strengthen every 30~50cm colligation levels subsequently Muscle (33), horizontal stiffener (33) end welded reinforcement connects the collar (13), simultaneously every 50~100cm colligation support members (17);
4) mould bag (16) is set: be inserted in mould bag (16), mould bag (16) and support member (17) colligation, bottom in steel reinforcement cage (24) outside Be inserted in the pre-embedded bolt (34) on steel reinforcement cage (14) base plate, and with L-type pressing plate join (35) close nut (23) tighten fixing;
5) precast square pile (5) is implanted: at the upper fixing connection vertical tube (7) with anchor cable (9) of pre-buried connection end (11), subsequently will be pre- Square pile processed (5) lifting is implanted, and after implantation, between two precast square piles (5), welded still pipe supports (29);
6) tunnel limit buttress brace (2) is connected with precast square pile (5): horizontal screw bolt (32) and tunnel limit that precast square pile (5) is reserved are strengthened The upper reserved horizontal bar (3) that is followed by of beam (2) welds;
7) pour cast-in-place wallboard wall (18): lifting steel reinforcement cage (14), make reinforcing bar connected set ring (13) through connecting vertical tube (7), in real time Control steel reinforcement cage (14) perpendicularity and position, while insert steel reinforcement cage (14) limit to fill concrete;
8) fixing anchor cable (9): after anchor cable (9) stretch-draw, injects mortar within connecting 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 precast square pile (5) top;
10) slope construction and face upward slope: construction grouting rock bolt (25) and in-network processing (26) form bank protection.
CN201610651303.9A 2016-08-10 2016-08-10 Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method Active CN106149733B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108824451A (en) * 2018-08-29 2018-11-16 武岳 Tunnel immediately adjacent to bridge section deep foundation pit supporting structure and construction method
CN108951652A (en) * 2018-08-08 2018-12-07 武岳 Tunnel immediately adjacent to bridge 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

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108951652A (en) * 2018-08-08 2018-12-07 武岳 Tunnel immediately adjacent to bridge 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
CN108824451A (en) * 2018-08-29 2018-11-16 武岳 Tunnel immediately adjacent to bridge section deep foundation pit supporting structure 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

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