CN114198116B - Pipe curtain box culvert integration tunnel structure with connect and strengthen - Google Patents
Pipe curtain box culvert integration tunnel structure with connect and strengthen Download PDFInfo
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- CN114198116B CN114198116B CN202111328222.2A CN202111328222A CN114198116B CN 114198116 B CN114198116 B CN 114198116B CN 202111328222 A CN202111328222 A CN 202111328222A CN 114198116 B CN114198116 B CN 114198116B
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- 230000010354 integration Effects 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 28
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 38
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 239000002689 soil Substances 0.000 description 16
- 238000003466 welding Methods 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 6
- 238000005553 drilling Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 231100000681 Certain safety factor Toxicity 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011376 self-consolidating concrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
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- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
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- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
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Abstract
The invention provides a pipe curtain box culvert integrated tunnel structure with joint reinforcement, which comprises a plurality of rectangular steel pipe sections which are spliced and enclosed by single bodies, wherein a CT-shaped joint formed by a C-shaped female joint and a T-shaped sub-joint is connected with adjacent rectangular steel pipe sections, concrete is poured into the pipe sections, and grouting material is poured into a joint gap to form an integrated pipe curtain structure; the pipe curtain reinforcing structure is characterized by further comprising a joint reinforcing structure, wherein the joint reinforcing structure is longitudinally arranged between the pipe curtain longitudinal partition plates along the pipe curtain joint, the upper edge and the lower edge of the pipe curtain are symmetrically arranged, and the joint reinforcing structure consists of an opening area joint reinforcing substructure and a partition plate indirect joint reinforcing substructure. The structure provided by the invention fully makes up the defect that the joint area of the pipe curtain box culvert integrated structure is weak, reduces the deformation and cracking of the joint, improves the service-period bearing capacity of the pipe curtain box culvert integrated structure, and improves the structural durability and waterproofness; meanwhile, the joint reinforcing structure is simple in construction and is a reliable and economical pipe-curtain box culvert integrated joint reinforcing structure.
Description
Technical Field
The invention relates to a pipe curtain box culvert, and belongs to the technical field of underground engineering.
Background
The current common construction method of the tunnel comprises the following steps: open cut method, drilling and blasting method, shield method, pipe jacking method, pipe curtain box culvert method and the like. The open cut method and the drilling and blasting method are limited by the field and the environmental conditions; the shield method and the pipe jacking method have small tunnel sections and cannot meet the requirement of large traffic flow; the pipe curtain-box culvert construction method can better control environmental influence due to the upper soil retaining effect of the steel pipe curtain, has the advantages of large tunnel section size and the like, but has long construction time, and the pipe curtain has small environmental control effect in the normal use stage of the structure, so that the pipe curtain cannot be recovered, thereby causing high construction cost.
The pipe curtain box culvert construction method is one of main construction methods for sensitive nodes such as urban underpass operation traffic routes and the like, and is continuously developed in recent years, and the pipe curtain box culvert integrated construction method is improved from an initial pipe curtain supporting box culvert jacking construction method or a box culvert replacement pipe curtain construction method. The design of the pipe curtain joint is taken as an important link in a pipe curtain box culvert construction method, and the design is mainly carried out by considering the soil retaining and water stopping performance of the pipe curtain joint in the traditional pipe curtain supporting box culvert jacking construction method or the pipe curtain replacing construction method of the box culvert.
In the existing pipe curtain joint design technology, external locking notches such as angle steel and the like are generally adopted to be welded between adjacent pipe curtain steel pipes in a single spot mode, and the pipe curtain box culvert integrated construction new method cannot be guaranteed to serve as a construction early-stage supporting structure and serve as a rectangular pipe curtain of a downward-penetrating channel main body bearing structure to form an integral stress structure system.
Therefore, the technical problem to be solved by the relevant people in the field is urgent to design a joint reinforcing structure between rectangular pipe curtains in a pipe curtain box culvert integrated construction method to realize tight connection between the pipe curtains to form an underground main structure capable of bearing force integrally.
Disclosure of Invention
According to the invention, a steel pipe is jacked into a soil body through a small rectangular pipe jacking machine, adjacent pipe sections are connected through an integrated locking notch, and high-flow concrete is poured into the pipe sections, so that a safe pipe curtain-box culvert integrated tunnel structure form is finally formed; the construction speed is high, and the economy is good; the tunnel structure can be widely applied to tunnel structures with shallow burying depth and strict environmental influence control.
In view of the above defects in the prior art, the invention provides a reinforced pipe-roof box culvert integrated tunnel structure, which aims to realize the enhancement of the strength and the rigidity among rectangular pipe roofs and ensure the integral bearing performance of the rectangular pipe roofs.
In order to achieve the purpose, the invention provides a pipe curtain box culvert integrated tunnel structure with joint reinforcement, which is characterized by comprising a plurality of rectangular steel pipe joint monomers which are spliced and enclosed;
c-shaped female joints and T-shaped sub joints are welded on the edges of four corners of each rectangular steel pipe joint monomer respectively, CT-shaped joints formed by the C-shaped female joints and the T-shaped sub joints are connected with adjacent rectangular steel pipe joints, concrete is poured into the pipe joints, and grouting materials are poured into gaps among the joints to form an integrated pipe curtain structure;
the pipe curtain joint reinforcing structure is longitudinally arranged between the pipe curtain longitudinal partition plates along the pipe curtain joint, the upper edge and the lower edge of the pipe curtain are symmetrically arranged, and the pipe curtain joint reinforcing structure consists of an opening area joint reinforcing substructure and a partition plate inter-joint reinforcing substructure;
CT shape connects and contains that female joint is C shape structure, and the son connects for T shape structure: the left side is a C-shaped female joint, the right side is a T-shaped sub-joint, and grouting material is filled in the gap between the C-shaped female joint and the T-shaped sub-joint to form different pipe sections of the pipe curtain-box culvert integrated tunnel structure;
the rectangular steel pipe section adopts steel with different strength indexes according to the design strength, and the steel is usually Q235 steel;
the opening area joint reinforcement substructure is welded in the opening area between the pipe curtain longitudinal clapboards, the transverse length of the opening area joint reinforcement substructure is 1-1.5 times that of the pipe curtain joint, and the longitudinal width of the opening area joint reinforcement substructure is equal to that of the opening area between the pipe curtain longitudinal clapboards;
the open area joint reinforcement substructure consists of transverse stiffening ribs, longitudinal stiffening ribs and transverse steel plates, wherein the lower edges of the longitudinal stiffening ribs are welded on the pipe curtain steel plates at two sides of the pipe curtain joint in the joint area, the upper edges of the longitudinal stiffening ribs are welded with the transverse steel plates, and the transverse stiffening ribs are welded on the transverse steel plates;
the space between the longitudinal stiffening ribs is 120 mm-180 mm, the height is 60-100 mm, the space between the transverse stiffening ribs is 120 mm-180 mm, the height is 40-80 mm, and the thickness of the transverse stiffening ribs, the longitudinal stiffening ribs and the transverse steel plate is consistent and is about 1-1.1 times of that of the pipe curtain steel plate;
the reinforcing substructure of the joint between the partition boards is formed by penetrating a threaded steel bar through a hole of the longitudinal partition board and screwing nuts on two sides of the threaded steel bar;
the center level of the holes of the partition board is consistent with the center line level of the transverse steel plate, the distance between the holes is 100-150 mm, and the diameter of the holes is about 20mm.
Compared with the prior art, the invention has the following advantages:
the structure provided by the invention can be applied to shallow burying and ultra-shallow burying, and the influence of the construction environment of the structure is well controlled, and the stress is safe; the tunnel structure is formed by splicing pipe sections, so that the number of the pipe sections can be adjusted according to the construction engineering requirements to form tunnel structure sections with different sizes; the economy is good, the small rectangular jacking pipe construction is adopted, and the mechanization level is high; the pipe curtain joint overcomes the defects that in the prior art, the pipe curtain joint only has the functions of retaining soil and stopping water, the joint rigidity between the pipe curtains is insufficient, and the deformation resistance is poor, improves the joint strength and rigidity between the pipe curtains, plays the roles of retaining soil, stopping water and bearing of the joint, realizes effective connection and transmission stress between the pipe curtains, ensures the whole stress capacity of the pipe curtains, has simple joint reinforcing structure and easy construction operation, is a simple, safe, practical and efficient joint reinforcing structure design method, and is favorable for the development of a pipe curtain box culvert integrated construction method.
Drawings
FIG. 1 is a view showing a CT-shaped joint structure
FIG. 2 reference tube
Figure 3 spigot-and-socket pipe
FIG. 4 push bench for inserting socket pipe into reference pipe
Figure 5 corner pipe socket
FIG. 6 is a schematic view of a cross section of a pipe curtain box culvert integrated tunnel structure
FIG. 7 detail view of adjacent pipe sections
FIG. 8 is a flow chart of the construction of the pipe-roof box-culvert integrated tunnel according to the embodiment
Fig. 9 is a schematic perspective view of a pipe curtain box culvert integrated joint reinforcing structure.
Figure 10 is a schematic front view of a pipe curtain box culvert integrated joint reinforcing structure.
Figure 11 is a schematic view of a pipe curtain box culvert integrated joint reinforcing structure section I-I.
Fig. 12 is a perspective view of a pipe curtain box culvert integrated open area joint reinforcement structure.
Figure 13 is a schematic front view of the pipe curtain box culvert integrated open area joint reinforcement structure.
Figure 14 is a schematic side view of a pipe curtain box culvert integrated open area joint reinforcement structure.
Fig. 15 is a schematic perspective view of a joint reinforcement sub-structure between pipe-roof box-culvert integrated partition plates.
Fig. 16 is a schematic front view of a joint reinforcing substructure between pipe-roof box culvert integrated partition plates.
Figure 17 is a side schematic view of a pipe curtain box culvert integrated inter-baffle joint stiffener structure.
Numerical labeling:
a rectangular steel pipe section 1, a CT-shaped joint 3, a rectangular steel pipe section 4,
2-1 inside the pipe joint, 2-2 joint gaps, 5 joint inner gaps,
a tube sheet joint 11, a tube sheet longitudinal partition 12,
an open area joint reinforcement substructure 13, a bulkhead inter-joint reinforcement substructure 14,
the transverse stiffeners 15, the longitudinal stiffeners 16,
Detailed Description
Example 1:
a pipe curtain box culvert integrated tunnel structure comprises rectangular steel pipe joint monomers, wherein C-shaped female joints and T-shaped sub-joints are welded on the edges of four corners of each rectangular steel pipe joint monomer respectively, the CT-shaped joints (for short) formed by the C-shaped female joints and the T-shaped sub-joints are connected with adjacent rectangular steel pipe joints (for short), concrete is poured into the pipe joints, and grouting materials are poured into gaps of the joints to form an integrated pipe curtain structure.
Further, the CT-shaped joint comprises a C-shaped female joint and a T-shaped male joint, as shown in fig. 1: the left side is a C-shaped female joint, the right side is a T-shaped sub-joint, and the gap between the two is filled with grouting material.
Different pipe sections of the pipe curtain-box culvert integrated tunnel structure can be formed.
The pipe joint can adopt steel with different strength indexes according to the design strength, and the steel is usually Q235 steel.
A method for a pipe-curtain box culvert integrated tunnel comprises the following steps:
the first stage is as follows: design of
The CT-shaped joint (short for joint) is connected with the adjacent rectangular steel pipe joint (short for rectangular steel pipe joint) to form a pipe joint internal gap and a joint gap, and an integrated pipe curtain structure is designed and formed.
And 1.1, jacking different sections into a soil body through a rectangular pipe jacking machine, and then forming an integral structure through socket joint between the CT-shaped joints.
Step 1.2, welding C-shaped female joints on the periphery of the rectangular steel pipe to form a reference pipe to play a positioning role, as shown in figure 2;
step 1.3, welding 2C-shaped female joints at the upper part and the lower part of the corner of one side of a rectangular steel pipe, and arranging 2T-shaped sub-joints at the other side to form a socket pipe, as shown in figure 3;
step 1.4, inserting the socket pipe into a C-shaped female joint of the reference pipe through a T-shaped sub-joint to be connected, as shown in figure 4;
step 1.5, welding two C-shaped female joints below the rectangular steel pipe, arranging two T-shaped sub-joints on the left side to form a corner pipe, and constructing a side pipe arranging curtain by jacking the T-shaped sub-joints into the C-shaped female joints below the corner pipe; as shown in FIG. 5;
and repeating the steps, wherein the rectangular pipe jacking machine jacks one segment into the soil body, and the back CT-shaped joint socket can obtain the cross section of the pipe curtain box culvert integrated structure shown in the figure 6.
Second stage
The third stage
And 3, connecting adjacent pipe sections in the longitudinal direction of the tunnel in a welding mode, driving the pipe sections into the tunnel along the longitudinal direction in a pipe jacking mode, wherein the longitudinal extension of the tunnel can reach hundreds of meters.
Adopt above-mentioned technical scheme, compare with current tunnel structure form, have following advantage:
(1) The structure can be applied to shallow burying and ultra-shallow burying, and the influence of the structure construction environment is well controlled, and the stress is safe. The traditional shield method and pipe jacking method have large construction risks when the structure is applied to shallow burying (below 3 m) and even ultra-shallow burying (about 2 m), so that the method is rarely applied, and the open cut method cannot be carried out in a place with strict environmental influence control. Through finite element calculation, a tensile test of the CT-shaped joint and a bearing capacity test of the tube curtain-box culvert integrated CT-shaped connecting structure, the tube curtain-box culvert integrated structure of the CT-shaped joint can completely meet the stress performance requirement of the structure in the normal use stage under the burial depth of about 2m and has certain safety factor, so that the structure can better control the environmental influence during construction, can meet the stress requirement of the shallow or ultra-shallow buried tunnel structure, and has simple and clear structure form force transmission mode and safe stress.
(2) This structural style is various, because adopts the mode of tube coupling concatenation to form tunnel structure, consequently can form little section structure, also can form big section structure, can form the tunnel structure section of unidimensional according to building engineering requirement adjustment pipeline section quantity.
(3) The economy is good, the small rectangular pipe jacking construction is adopted, and the mechanization level is high; the steel pipe section jacked into the soil body is used as a part of the structure, the environment influence is controlled, meanwhile, the steel pipe section does not need to be recycled, and the economical efficiency is good.
In practical engineering application, in order to form the pipe-box culvert integrated tunnel structure, an embodiment construction method is further provided, and the method comprises the following steps of:
(1) First, it is necessary to construct "originating wells" and "receiving wells" on both sides of the traversed area.
(2) After the working well is completed, an operation platform is firstly erected, and soil body reinforcement is needed before the rectangular steel pipe curtain is formally jacked. The soil body reinforcement adopts a horizontal grouting mode to inject a special modifying agent into the soil layer penetrating through the soil layer.
(3) The whole driving sequence of the steel tube curtain comprises the steps of constructing an upper tube curtain, then constructing a side wall tube curtain and finally constructing a lower tube curtain, so that an integral structure is formed.
(4) Before the pipe curtain jacking, full-time measuring personnel can mark the current portal position according to the pipe curtain axis and arrange the pipe curtain jacking equipment. And the portal is chiseled out in a horizontal drilling and coring mode, so that the accuracy and the size of the starting portal are guaranteed.
(5) And (4) jacking the pipe curtain segments into the soil body by adopting a rectangular pipe jacking machine. The pipe curtain jacking is divided into a reference pipe, a socket pipe and a closed pipe. Firstly, constructing a reference pipe (figure 2) by adopting a front traction mode, firstly, horizontally punching holes from a working well by adopting a micro pipe jacking process respectively for installing steel strands for dragging a pipe curtain, arranging a hydraulic synchronous traction device in a receiving well, and dragging a pipe jacking machine by 4 steel strands so as to ensure the precision of the reference steel pipe.
(6) The socket pipe (figure 3) is connected with the finished steel pipe through the integrated locking notch (figure 1), so that the steel pipe does not deviate from the finished steel pipe in the jacking stage, the jacking precision of the socket pipe is improved, and a figure 4 is formed;
(7) In the pipe curtain jacking process, the front pipe curtain section and the rear pipe curtain section are connected in a welding mode. And separating the pipe jacking machine from the pipe curtain after reaching the receiving well.
(8) Meanwhile, soil in the gaps of the locking openings of the pipe curtains is manually cleaned at intervals of 50cm which are opened in advance.
(9) And the joint grouting material is compacted and poured at the locking hole from the inside of the pipe curtain.
(10) The process is repeated until the top row of discharge screens is completely pushed in. Sealing plates are welded on two sides of the pipe curtain, grouting holes are formed in the lower portions of the sealing plates, and air release holes and slurry overflow holes are formed in the tops of the sealing plates.
(11) And pouring high-fluidity self-compacting concrete into the interior, and finally finishing the construction of the structural top plate.
(12) Then, the side wall and the bottom corner pipe are constructed, then the bottom pipe curtain is constructed, and finally the construction of the closed pipe is carried out. After the concrete is completely filled, the pipe curtain ring beam is poured, and finally the square pipe curtain-box culvert integrated CT-shaped connecting structure is formed (forming a figure 6).
(13) After confirming that the upper pipe discharging screen can support all the loads on the upper part, the inner part of the pipe screen can be excavated.
(14) After the integral structure can bear the upper load, the inner soil body is excavated, and then the inner waterproof, pavement paving and inner decoration tunnel construction are finished.
Example 2
The invention relates to a reinforcing structure of a pipe curtain box culvert integrated tunnel structure in embodiment 1.
A pipe curtain box culvert integrated tunnel structure with joint reinforcement is longitudinally arranged between pipe curtain longitudinal partition plates 12 along a pipe curtain joint 11, the upper edge and the lower edge of a pipe curtain are symmetrically arranged, and the pipe curtain box culvert integrated tunnel structure consists of an opening area joint reinforcement substructure 13 and a partition plate inter-joint reinforcement substructure 14,
the opening area joint reinforcing substructure 13 is welded in the opening area between the pipe curtain longitudinal partition plates 12, the transverse length of the opening area joint reinforcing substructure 13 is 1-1.5 times that of the pipe curtain joint 11, and the longitudinal width of the opening area joint reinforcing substructure 13 is equal to that of the opening area between the pipe curtain longitudinal partition plates 12;
the opening area joint reinforcing substructure 13 consists of a transverse stiffening rib 15, a longitudinal stiffening rib 16 and a transverse steel plate 17, wherein the lower edge of the longitudinal stiffening rib 16 is welded on the pipe-curtain steel plates 18 at two sides of the joint area pipe-curtain joint 11, the upper edge of the longitudinal stiffening rib 16 is welded with the transverse steel plate 17, and the transverse stiffening rib 15 is welded on the transverse steel plate 17;
the distance between the longitudinal stiffening ribs 16 is 120 mm-180 mm, the height is 60 mm-100 mm, the distance between the transverse stiffening ribs 15 is 120 mm-180 mm, the height is 40 mm-80 mm, and the thickness of the transverse stiffening ribs 15, the longitudinal stiffening ribs 16 and the transverse steel plate 17 is consistent and is about 1-1.1 times of that of the pipe curtain steel plate 18;
the joint reinforcing substructure 14 between the partition boards is formed by penetrating a threaded steel bar 20 through a longitudinal partition board open hole and screwing nuts 19 at two sides of the threaded steel bar 20;
the center level of the opening of the partition board is consistent with the center line level of the transverse steel plate 17, the opening distance is 100-150 mm, and the opening diameter is about 20mm.
The construction process of the joint reinforcing structure is as follows:
(1) After the construction and the forming of the pipe curtain, welding longitudinal stiffening ribs 16 on pipe curtain steel plates 18 at two sides of a pipe curtain joint 11 at the lower edge of an opening area between the pipe curtain longitudinal partition plates 12;
(2) After the longitudinal stiffening ribs 16 are welded, transverse steel plates 17 are welded on the longitudinal stiffening ribs;
(3) Welding transverse stiffening ribs 15 on the transverse steel plates 17, and completing construction of the joint reinforcing substructure 13 at the lower edge of the single opening area;
(4) After the construction of the joint reinforcement substructure 13 at the lower edge of the single opening area is completed, repeating the steps (1) to (3) at the upper edge of the opening area, and completing the joint reinforcement substructure at the upper edge of the single opening area;
(5) Repeating the steps (1) to (4) until the construction of the joint reinforcement substructure of all the opening areas of the pipe curtain is completed;
(6) After the construction of the joint reinforcement substructure of all the opening areas of the pipe curtain is completed, corresponding opening openings between the longitudinal partition plates 12 of the adjacent pipe curtains penetrate through the threaded steel bars 20;
(7) The outer side of the longitudinal partition plate 12, namely both ends of the twisted steel bar 20, are screwed by nuts 19;
(8) Repeating the steps (6) - (7), and installing the twisted steel bars 20 on all corresponding opening holes at the upper edge and the lower edge of the single pair of partition plates to form a joint reinforcing substructure 14 between the single pair of partition plates;
(9) And (5) repeating the steps (6) to (8) until the construction of the joint reinforcing substructure between all the partition plates of the pipe curtain is completed.
Claims (1)
1. A pipe curtain box culvert integrated tunnel structure with joint reinforcement is characterized by comprising a plurality of rectangular steel pipe sections which are spliced and enclosed;
c-shaped female joints and T-shaped sub-joints are respectively welded on the edges of four corners of each rectangular steel pipe joint monomer, CT-shaped joints formed by the C-shaped female joints and the T-shaped sub-joints are adopted to be connected with adjacent rectangular steel pipe joints, concrete is poured into the pipe joints, grouting materials are poured into gaps of the joints, and an integrated pipe curtain structure is formed;
the pipe curtain joint reinforcing structure is longitudinally arranged between the pipe curtain longitudinal partition plates along the pipe curtain joint, the upper edge and the lower edge of the pipe curtain are symmetrically arranged, and the pipe curtain joint reinforcing structure consists of an opening area joint reinforcing substructure and a partition plate inter-joint reinforcing substructure;
the CT-shaped joint comprises a female joint which is of a C-shaped structure, and a sub-joint which is of a T-shaped structure: the left side is provided with a C-shaped female joint, the right side is provided with a T-shaped sub joint, and grouting material is filled in the gap between the C-shaped female joint and the T-shaped sub joint to form different pipe sections of the pipe curtain-box culvert integrated tunnel structure;
the opening area joint reinforcement substructure is welded in the opening area between the pipe curtain longitudinal clapboards, the transverse length of the opening area joint reinforcement substructure is 1-1.5 times that of the pipe curtain joint, and the longitudinal width of the opening area joint reinforcement substructure is equal to that of the opening area between the pipe curtain longitudinal clapboards;
the open area joint reinforcement substructure consists of transverse stiffening ribs, longitudinal stiffening ribs and transverse steel plates, wherein the lower edges of the longitudinal stiffening ribs are welded on the pipe curtain steel plates at two sides of the pipe curtain joint in the joint area, the upper edges of the longitudinal stiffening ribs are welded with the transverse steel plates, and the transverse stiffening ribs are welded on the transverse steel plates;
the space between the longitudinal stiffening ribs is 120 mm-180 mm, the height is 60-100 mm, the space between the transverse stiffening ribs is 120 mm-180 mm, the height is 40-80 mm, and the thickness of the transverse stiffening ribs, the longitudinal stiffening ribs and the transverse steel plate is consistent and is about 1-1.1 times of that of the pipe curtain steel plate;
the reinforcing substructure of the joint between the partition boards is formed by penetrating a threaded steel bar through a hole of the longitudinal partition board and screwing nuts on two sides of the threaded steel bar;
the center level of the holes of the partition board is consistent with the center line level of the transverse steel plate, the distance between the holes is 100-150 mm, and the diameter of the holes is about 20mm.
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| CN202111328222.2A CN114198116B (en) | 2021-11-10 | 2021-11-10 | Pipe curtain box culvert integration tunnel structure with connect and strengthen |
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| CN202111328222.2A CN114198116B (en) | 2021-11-10 | 2021-11-10 | Pipe curtain box culvert integration tunnel structure with connect and strengthen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3914640B2 (en) * | 1998-07-21 | 2007-05-16 | 新日本製鐵株式会社 | Connection structure of steel underground continuous wall and reinforced concrete slab |
| JP4494585B2 (en) * | 2000-04-24 | 2010-06-30 | 新日本製鐵株式会社 | Shield tunnel segment and its manufacturing method |
| CN104832196B (en) * | 2015-03-31 | 2018-08-21 | 中铁时代建筑设计院有限公司 | Pipe curtain freezing process supporting construction and its construction method |
| CN107100653A (en) * | 2017-05-23 | 2017-08-29 | 中铁四局集团第五工程有限公司 | A kind of flat top wall pipe curtain structure builds the construction method of super Shallow Covered Metro Station |
| CN109026030A (en) * | 2018-09-10 | 2018-12-18 | 中山大学 | Tunnel circumferential direction digs method |
| CN113404087B (en) * | 2021-07-14 | 2023-06-23 | 上海工程勘察设计有限公司 | Non-excavation steel plate locking grouting connecting device for underground structure |
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