CN109653772B - Shallow buried pipe curtain supporting system and construction method thereof - Google Patents
Shallow buried pipe curtain supporting system and construction method thereof Download PDFInfo
- Publication number
- CN109653772B CN109653772B CN201910108587.0A CN201910108587A CN109653772B CN 109653772 B CN109653772 B CN 109653772B CN 201910108587 A CN201910108587 A CN 201910108587A CN 109653772 B CN109653772 B CN 109653772B
- Authority
- CN
- China
- Prior art keywords
- plates
- plate
- steel
- steel pipe
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010276 construction Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 180
- 239000010959 steel Substances 0.000 claims abstract description 180
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 239000011376 self-consolidating concrete Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 47
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 12
- 239000004567 concrete Substances 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention provides a shallow buried pipe curtain supporting system and a construction method thereof. The invention comprises the following steps: the steel tube reinforcing structure comprises a plurality of first steel tubes and second steel tubes which are arranged at intervals and a connecting mechanism arranged on each steel tube, wherein the connecting mechanism comprises an upper flange plate, a lower flange plate, a large rib plate and a small rib plate, mutually matched lock catches are fixedly arranged on the upper flange plate, the first steel tubes and the second steel tubes which are arranged at intervals are n-shaped, and the reinforcement of a system is completed by filling micro-expansion cement paste and self-compacting concrete. The support system and the construction method provided by the invention can effectively reduce the surface subsidence, ensure the safety and reliability of the upper structure, have high utilization rate of underground space, more reasonable structural stress, simple construction method and working procedures and stronger economical efficiency.
Description
Technical Field
The invention relates to the field of tunnel and underground engineering construction, in particular to a shallow pipe curtain supporting system and a construction method thereof.
Background
With the continuous acceleration of the urbanization process in China and the continuous concentration of urban population, the construction of subways and underground express ways becomes one of the main ways for relieving traffic pressure of various big cities. In the shallow-buried large-section tunnel engineering which penetrates through the existing buildings, structures and urban highways, the pipe-curtain construction method can well reduce the ground surface settlement, ensure the safety and reliability of the upper structure and has obvious advantages.
However, the current pipe curtain supporting system has the following problems: (1) the pipe curtain structure completes the inter-pipe connection by cutting the steel pipe, so that the integrity of the steel pipe is damaged, and the rigidity and the bearing capacity of the steel pipe are reduced; (2) because the elastic modulus difference between the steel pipe and the concrete is large, the concrete between the outer wall of the steel pipe and the pipe is peeled off under the action of load, and the structural rigidity and the bearing capacity are weakened; (3) under the action of load, the concrete between the pipes forms a through inclined crack along the outer walls of the two connected steel pipes, so that the compression resistance of the concrete at the upper part between the pipes is poorer, the tensile property of the tensile connecting member at the middle lower part between the pipes is poorer, and the resource utilization rate is lower; (4) the construction site has more processing steps and complex construction method and procedure, so that the construction progress is slow; (5) the pipes are not tightly connected, and water seepage phenomenon exists; (6) in the jacking process of the traditional pipe curtain, the friction force of a soil layer to a steel pipe is large, and the jacking is difficult; (7) the traditional pipe curtain causes the upper soil body to fall off in the inter-pipe soil discharging process, so that the ground surface is settled.
Disclosure of Invention
In view of the above-mentioned technical problems, a shallow buried pipe curtain supporting system and a construction method thereof are provided.
The technical means adopted by the invention are as follows:
a shallow pipe curtain supporting system comprises a plurality of first steel pipes, a plurality of second steel pipes and connecting mechanisms, wherein the first steel pipes are arranged at intervals, the connecting mechanisms are arranged on the steel pipes, the connecting mechanisms of the first steel pipes comprise first upper flange plates, first lower flange plates, first large rib plates and first small rib plates, the first upper flange plates and the first lower flange plates are respectively and fixedly arranged on two sides of the first steel pipes, the first large rib plates and the first small rib plates are respectively and fixedly arranged on two sides of the first steel pipes and in the middle of the first upper flange plates and the first lower flange plates, and C-shaped steel latches are fixedly arranged at the end parts of the first upper flange plates;
the connecting mechanism of the second steel pipe comprises two second upper flange plates, two second lower flange plates, two second large rib plates and two second small rib plates, the two second upper flange plates and the two second lower flange plates are fixedly arranged on two sides of the second steel pipe respectively, the second large rib plates and the second small rib plates are fixedly arranged on two sides of the second steel pipe respectively, and the middle positions of the second upper flange plates and the second lower flange plates, the end parts of the second upper flange plates are fixedly provided with T-shaped latches which are matched with the C-shaped steel latches and can slide in grooves of the C-shaped steel latches, all the plates in the system are parallel to a horizontal plane, the upper flange plates of the first steel pipe and the second steel pipe are parallel and level, the lower flange plates are also parallel and level, and the first large rib plates and the second large rib plates have height difference;
the first steel pipe and the second steel pipe which are arranged at intervals are n-shaped, the left upper corner and the right upper corner of the n-shaped steel pipe are respectively a third steel pipe and a fourth steel pipe which are adaptively adjusted, two upper flange plates and two lower flange plates in a connecting mechanism are arranged at right angles, and the large rib plate and the small rib plate are arranged in the middle of the upper flange plates and the lower flange plates;
and grouting holes are formed in the steel pipes, in the system construction process, adjacent steel pipes are connected through lock catches and then fastened with adjacent lower flange plates through welding, and preset fillers are filled in lock catch gaps, pipe intervals and pipes.
Furthermore, the specifications of the steel pipes are the same, the diameters of the steel pipes are D, the thicknesses of the steel pipes are H, the upper flange plates, the lower flange plates, the large rib plates and the small rib plates are fixedly connected to the corresponding steel pipes in a welding mode, the thicknesses of the plates of the same type are the same, and the thickness range of each type of plate is 0.8H-1.5H.
Furthermore, the upper flange plate and the lower flange plate on the same side of the steel pipe are symmetrically and fixedly arranged along a horizontal line passing through the centroid of the steel pipe, the vertical distance of the upper flange plate and the lower flange plate is distributed along the center line of the steel pipe in the horizontal direction, and the specific vertical distance is 0.65-0.85D.
Furthermore, each large rib plate is a right-angle trapezoidal steel plate, wherein the acute angle is 30-60 degrees, 2 large rib plates are arranged on the same side of each steel pipe in a flush mode, the longitudinal interval between the large rib plates is 0.5-2D, the distance between the first large rib plate and the first upper flange plate is 0.08-0.2D, the distance between the second large rib plate and the second upper flange plate is 0.08-0.15D, the vertical interval between the first large rib plate and the second large rib plate is larger than 20cm or 0.02D, the widths of the first large rib plate and the second large rib plate are equal, and the width L meets the requirement that the longitudinal overlapping portion is 0.05-0.2D.
Furthermore, each small rib plate is equal to the steel pipe in length, the end part of each small rib plate is an acute angle, the angle is 10-30 degrees, the width of each small rib plate is 3-20 cm, and each small rib plate is arranged between the upper flange plate and the large rib plate and between the large rib plate and the lower flange plate, wherein the number of the small rib plates between the first upper flange plate and the first large rib plate is 1, and the number of the small rib plates between the first large rib plate and the first lower flange plate is 2-4; the number of the small ribs between the second upper flange plate and the second large rib plate is 1, the number of the small ribs between the second large rib plate and the second lower flange plate is 3-5, and the small ribs are uniformly distributed between the large rib plate and the lower flange plate.
And furthermore, micro-expansion cement slurry is filled in the lock catch, self-compacting concrete is filled in the interval between the pipes and the pipe, and the left and right soil bodies of the lowest steel pipe and the soil bodies of the lower part of the steel pipe are grouted and reinforced at the support legs of the n-shaped structure to form an external reinforced soil body.
Furthermore, 4 grouting holes are arranged on the same grouting plane, the included angles between the corresponding circle centers of the grouting holes and the transverse connection direction are respectively 0 degree, 90 degrees, 180 degrees and 270 degrees, and the aperture of each grouting hole is 30-50 mm.
The invention also provides a construction method of the novel pipe curtain supporting structure, which comprises the following steps:
s1, designing a pipe curtain supporting system according to engineering requirements, determining the sizes, the numbers and the positions of the steel pipes, the upper flange plate, the lower flange plate, the lock catches, the large rib plates and the small rib plates, processing and forming steel materials in a factory, and completing the assembly of the steel pipes and corresponding components through welding;
s2, excavating a vertical shaft at the construction position, arranging a counterforce wall, and building a construction platform;
s3, erecting pipe jacking equipment, installing a horizontal directional drilling machine, and completing construction of a guide hole;
s4, performing pipe jacking construction of the first steel pipe and the second steel pipe of the n-shaped structure layer by layer according to the sequence from top to bottom; the first steel pipe and the second steel pipe are alternatively pushed in, and when two adjacent steel pipes are pushed in, the upper flange plate of the second steel pipe is connected with the upper flange plate of the first steel pipe through a lock catch; grouting and drag reduction are carried out while pipe jacking construction is carried out;
s5, after the steel pipe at the lowest support leg of the system is jacked, grouting and reinforcing the left, right and lower soil bodies of the system;
s6, after soil around the supporting legs is reinforced, firstly, cleaning soil between the lock catches, and injecting micro-expansion cement slurry after the soil between the lock catches is emptied; after the micro-expansion cement paste reaches the designed strength, clearing soil between pipes, and injecting self-compacting concrete after the soil between pipes is cleared; after the concrete among the pipes reaches the design strength, clearing the soil in the pipes, and injecting self-compacting concrete after the soil in the pipes is emptied;
and S7, sequentially welding the lower flange plates of the two adjacent steel pipes along with excavation of the cavern.
Furthermore, the soil cleaning among the lock catches, the soil cleaning in the pipes and the soil cleaning in the pipes are carried out by using a high-pressure water gun and matching with a sand sucker or a horizontal spiral drill.
The invention has the following advantages:
in shallow large-section tunnel engineering which penetrates through existing buildings, structures and urban highways, the support system and the construction method provided by the invention can effectively reduce surface subsidence, ensure the safety and reliability of the upper structure, have high utilization rate of underground space, more reasonable structural stress, simple construction method and working procedures and stronger economical efficiency. Meanwhile, on the premise of not damaging the integrity of the steel pipe, the stress of each component of the pipe curtain is more reasonable, the performance of each component is fully exerted, the overall transverse rigidity and bearing capacity of the pipe curtain are improved, the upper soil body is effectively prevented from falling off, the water seepage phenomenon is prevented, the processing steps of a construction site are fewer, the construction method and the working procedures are simple, the jacking is easier, and the construction efficiency and the construction quality are obviously improved. Based on the reasons, the invention can be widely popularized in the field of tunnel and underground engineering construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the shallow buried pipe curtain support system of the present invention.
FIG. 2 is a simplified diagram illustrating the connection relationship between the components of the present invention.
FIG. 3 is a schematic view of a first steel pipe and related connecting members according to the present invention.
FIG. 4 is a schematic view of a second steel pipe and associated connecting members according to the present invention.
FIG. 5 is a schematic view showing the connection of a first steel pipe and a second steel pipe according to the present invention.
In the figure: 1. a first steel pipe; 2. a second steel pipe; 3. externally reinforcing the soil body; 4. a first upper flange plate; 5. a first lower flange plate; 6. a first large rib plate; 7. a first small rib plate; 8. c-shaped steel lock catches; 9. a second upper flange plate; 10. a second lower flange plate; 11. a second large rib plate; 12. a second small rib plate; 13. t-shaped lock catches; 14. grouting holes; 15. self-compacting concrete filled in the pipe; 16. self-compacting concrete filled between the pipes at intervals; 17. and micro-expansion cement slurry filled in the lock catch.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a shallow-buried pipe curtain supporting system, which comprises a plurality of first steel pipes 1 and second steel pipes 2 which are arranged at intervals, and a connecting mechanism arranged on each steel pipe, wherein the connecting mechanism of each first steel pipe 1 comprises two first upper flange plates 4, two first lower flange plates 5, two first large rib plates 6 and two first small rib plates 7, the two first upper flange plates 4 and the two first lower flange plates 5 are respectively and fixedly arranged on two sides of the first steel pipe 1, the first large rib plates 6 and the first small rib plates 7 are respectively and fixedly arranged on two sides of the first steel pipe 1 and in the middle positions of the first upper flange plates 4 and the first lower flange plates 5, and the end part of each first upper flange plate 4 is fixedly provided with a C-shaped steel lock 8; wherein, the big ribbed slab plays the effect of transmitting pressure, and the little ribbed slab plays the effect of preventing to follow the oblique crack of pipe wall and produce.
The connecting mechanism of the second steel pipe 2 comprises two second upper flange plates 9, two second lower flange plates 10, two second large rib plates 11 and two second small rib plates 12, the two second upper flange plates 9 and the two second lower flange plates 10 are respectively fixedly arranged on two sides of the second steel pipe 2, the two second large rib plates 11 and the two second small rib plates 12 are respectively fixedly arranged on two sides of the second steel pipe 2 and in the middle of the second upper flange plates 9 and the second lower flange plates 10, the end part of the second upper flange plate 9 is fixedly provided with a T-shaped lock 13 which is matched with the C-shaped steel lock 8 and can slide in a groove of the C-shaped steel lock, each plate in the system is parallel to a horizontal plane, the upper flange plates of each first steel pipe 1 and the second steel pipe 2 are parallel and level, the lower flange plates are also parallel and level, and the first large rib plates 6 and the second large rib plates 11 have a height difference;
in this embodiment, the C-shaped steel lock catch is C-shaped steel that sets firmly on the upper flange plate, and the T-shaped lock catch is the vertical steel sheet that sets firmly on the upper flange plate, and vertical steel sheet makes up into the T with the upper flange plate and appears.
The first steel pipe 1 and the second steel pipe 2 which are arranged at intervals are n-shaped, the left upper corner and the right upper corner of the n-shaped steel pipe are respectively a third steel pipe and a fourth steel pipe, the third steel pipe and the fourth steel pipe are respectively the first steel pipe 1 and the second steel pipe 2 which are subjected to adaptability adjustment, two upper flange plates and two lower flange plates in a connecting mechanism are arranged in a right angle mode, and a large rib plate and a small rib plate are arranged in the middle of the upper flange plates and the lower flange plates;
specifically, the connecting mechanism of the third steel pipe comprises two third upper flange plates, two third lower flange plates, two third large rib plates and two third small rib plates, wherein the two upper flange plates and the two lower flange plates are arranged at right angles in the connecting mechanism, the third large rib plates and the three third small rib plates are arranged in the middle of the third upper flange plates and the third lower flange plates, a straight line where a center point of a major arc obtained by cutting the steel pipe by the upper flange plate and a center point of a minor arc obtained by cutting the steel pipe by the lower flange plate passes through the centroid of the steel pipe, the formed straight line bisects the major arc and the minor arc, and one upper flange plate is provided with a T-shaped lock 13 or a C-shaped steel 8 which is matched with the C-shaped lock 8 or the T-shaped lock 13 on the adjacent steel pipe. The fourth steel pipe and the third steel pipe are symmetrically distributed outside.
The two third upper flange plates and the two third lower flange plates are respectively fixedly arranged on two sides of the first steel pipe 1, the first large rib plate 6 and the first small rib plate 7 are respectively fixedly arranged on two sides of the first steel pipe 1 and in the middle of the first upper flange plate 4 and the first lower flange plate 5, and the end part of the first upper flange plate 4 is fixedly provided with a C-shaped steel lock catch 8;
and grouting holes 14 are formed in the steel pipes, in the system construction process, adjacent steel pipes are connected through lock catches and then are fastened with adjacent lower flange plates through welding, and preset fillers are filled in lock catch gaps, pipe intervals and the pipes.
The steel pipes are same in specification, the diameters of the steel pipes are D, the thicknesses of the steel pipes are H, the upper flange plates, the lower flange plates, the large rib plates and the small rib plates are fixedly connected to the corresponding steel pipes in a welding mode, the thickness of the plates of the same type is the same as that of the plates of the same type as a preferred embodiment, and the thickness range of the plates of the different types is 0.8H-1.5H.
The upper flange plate and the lower flange plate on the same side of the steel pipe are symmetrically and fixedly arranged along a horizontal line penetrating through the centroid of the steel pipe, the vertical distance of the upper flange plate and the lower flange plate is distributed along the center line of the steel pipe in the horizontal direction, and as a preferred embodiment, the specific vertical distance is 0.65-0.85D.
Each large rib plate is a right-angled trapezoidal steel plate, wherein an acute angle is 30-60 degrees, 2 large rib plates are arranged on the same side of each steel pipe in a flush manner, the longitudinal interval between the large rib plates is 0.5-2D, the distance between a first large rib plate 6 and a first upper flange plate 4 is 0.08-0.2D, the distance between a second large rib plate 11 and a second upper flange plate 9 is 0.08-0.15D, the vertical interval between the first large rib plate 6 and the second large rib plate 11 is greater than 20cm or 0.02D, the widths of the first large rib plate 6 and the second large rib plate 11 are equal, and the width L meets the condition that the longitudinal overlapping part is 0.05-0.2D.
Each small rib plate is equal to the steel pipe in length, the end part of each small rib plate is an acute angle, as a preferred embodiment, the angle is 10-30 degrees, the width of each small rib plate is 3-20 cm, the small rib plates are distributed between the upper flange plate and the large rib plate and between the large rib plate and the lower flange plate, the number of the small rib plates between the first upper flange plate 4 and the first large rib plate 6 is 1, and the number of the small rib plates between the first large rib plate 6 and the first lower flange plate 5 is 2-4; the number of the small ribs between the second upper flange plate 9 and the second large rib plate 11 is 1, the number of the small ribs between the second large rib plate 11 and the second lower flange plate 10 is 3-5, and the small ribs are uniformly distributed between the large rib plate and the lower flange plate.
The lock catch is filled with micro-expansion cement paste 17, the space 16 between the pipes and the inner 15 of the pipe are filled with self-compacting concrete, and the left and right of the lowest steel pipe and the soil body below the steel pipe are grouted and reinforced at the support legs of the n-shaped structure to form an outer reinforced soil body 3.
As a preferred embodiment, 4 grouting holes 14 are further arranged on the same grouting plane, the corresponding circle centers of the grouting holes 14 and the included angles of the transverse connection direction are respectively 0 degree, 90 degrees, 180 degrees and 270 degrees, the aperture of each grouting hole 14 is 30-50 mm, and a plurality of groups of similar grouting holes 14 are arranged on different planes of the steel pipe.
The invention also provides a construction method of the shallow buried pipe curtain supporting structure, which comprises the following steps:
s1, designing a pipe curtain supporting system according to engineering requirements, determining the sizes, the numbers and the positions of the steel pipes, the upper flange plate, the lower flange plate, the lock catches, the large rib plates and the small rib plates, processing and forming steel materials in a factory, and completing the assembly of the steel pipes and corresponding components through welding;
s2, excavating a vertical shaft at the construction position, arranging a counterforce wall, and building a construction platform;
s3, erecting pipe jacking equipment, installing a horizontal directional drilling machine, and completing construction of a guide hole;
s4, performing pipe jacking construction on the first steel pipe 1 and the second steel pipe 2 of the n-shaped structure layer by layer according to the sequence from top to bottom; the first steel pipe 1 and the second steel pipe 2 are alternatively pushed in, and when two adjacent steel pipes are pushed in, the upper flange plate of the second steel pipe is connected with the upper flange plate of the first steel pipe through a lock catch; grouting and drag reduction are carried out while pipe jacking construction is carried out;
s5, after the steel pipe at the lowest support leg of the system is jacked, grouting and reinforcing the left, right and lower soil bodies of the system;
s6, after soil around the supporting legs is reinforced, firstly, cleaning soil between the lock catches, and injecting micro-expansion cement slurry after the soil between the lock catches is emptied; after the micro-expansion cement paste reaches the designed strength, clearing soil between pipes, and injecting self-compacting concrete after the soil between pipes is cleared; after the concrete 16 between the pipes reaches the design strength, clearing the soil in the pipes, and injecting the self-compacting concrete 15 after the soil in the pipes is emptied;
after the soil between the pipes and the soil in the pipes are emptied, in practical engineering, plugging plates are generally arranged at the end parts of the steel pipes and the end parts of the gaps, and air holes are formed in the plugging plates to form grouting spaces.
And S7, sequentially welding the lower flange plates of the two adjacent steel pipes along with excavation of the cavern.
In a preferred embodiment, the soil cleaning work among the lock catches, the soil cleaning work in the pipe and the soil cleaning work in the pipe are carried out by using a high-pressure water gun and matching with a sand sucker or a horizontal spiral drill.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A shallow pipe curtain supporting system is characterized by comprising a plurality of first steel pipes, a plurality of second steel pipes and connecting mechanisms, wherein the first steel pipes are arranged at intervals, the connecting mechanisms are arranged on the steel pipes, the connecting mechanisms of the first steel pipes comprise first upper flange plates, first lower flange plates, first large rib plates and first small rib plates, the first upper flange plates and the first lower flange plates are respectively and fixedly arranged on two sides of the first steel pipes, the first large rib plates and the first small rib plates are respectively and fixedly arranged on two sides of the first steel pipes and in the middle of the first upper flange plates and the first lower flange plates, and C-shaped steel latches are fixedly arranged at the end parts of the first upper flange plates;
the connecting mechanism of the second steel pipe comprises two second upper flange plates, two second lower flange plates, two second large rib plates and two second small rib plates, the two second upper flange plates and the two second lower flange plates are fixedly arranged on two sides of the second steel pipe respectively, the second large rib plates and the second small rib plates are fixedly arranged on two sides of the second steel pipe respectively, and the middle positions of the second upper flange plates and the second lower flange plates, the end parts of the second upper flange plates are fixedly provided with T-shaped latches which are matched with the C-shaped steel latches and can slide in grooves of the C-shaped steel latches, all the plates in the system are parallel to a horizontal plane, the upper flange plates of the first steel pipe and the second steel pipe are parallel and level, the lower flange plates are also parallel and level, and the first large rib plates and the second large rib plates have height difference;
the first steel pipe and the second steel pipe which are arranged at intervals are n-shaped, the left upper corner and the right upper corner of the n-shaped steel pipe are respectively a third steel pipe and a fourth steel pipe which are adaptively adjusted, two upper flange plates and two lower flange plates in a connecting mechanism are arranged at right angles, and the large rib plate and the small rib plate are arranged in the middle of the upper flange plates and the lower flange plates;
each steel pipe is provided with a grouting hole, in the construction process of the system, adjacent steel pipes are connected through lock catches and then fastened with adjacent lower flange plates through welding, and preset fillers are filled in lock catch gaps, pipe intervals and the pipes;
each large rib plate is a right-angle trapezoidal steel plate, wherein the acute angle is 30-60 degrees, 2 large rib plates are arranged on the same side of each steel pipe in a flush mode, the longitudinal interval of the large rib plates is 0.5-2D, the distance between a first large rib plate and a first upper flange plate is 0.08-0.2D, the distance between a second large rib plate and a second upper flange plate is 0.08-0.15D, the vertical interval between the first large rib plate and the second large rib plate is larger than 0.02D, the width of the first large rib plate is equal to that of the second large rib plate, the width L meets the requirement that the longitudinal overlapping portion is 0.05-0.2D, and D represents the diameter of the steel pipe;
each small rib plate is equal to the steel pipe in length, the end part of each small rib plate is an acute angle, the angle is 10-30 degrees, the width of each small rib plate is 3-20 cm, and each small rib plate is arranged between the upper flange plate and the large rib plate and between the large rib plate and the lower flange plate, wherein the number of the small rib plates between the first upper flange plate and the first large rib plate is 1, and the number of the small rib plates between the first large rib plate and the first lower flange plate is 2-4; the number of the small ribs between the second upper flange plate and the second large rib plate is 1, the number of the small ribs between the second large rib plate and the second lower flange plate is 3-5, and the small ribs are uniformly distributed between the large rib plate and the lower flange plate.
2. The shallow buried pipe curtain supporting system as claimed in claim 1, wherein the steel pipes are of the same specification, the diameters of the steel pipes are D, the thicknesses of the steel pipes are H, the upper flange plate, the lower flange plate, the large rib plate and the small rib plate are fixedly connected to the corresponding steel pipes in a welding mode, the thickness of the plates of the same type is the same, and the thickness range of the plates of each type is 0.8H-1.5H.
3. The shallow-buried pipe curtain supporting system as claimed in claim 2, wherein the upper flange plate and the lower flange plate on the same side as the steel pipe are symmetrically and fixedly arranged along a horizontal line passing through the centroid of the steel pipe, and the vertical distance is distributed along the center line of the steel pipe in the horizontal direction, and is 0.65-0.85D.
4. The shallow pipe curtain supporting system as claimed in claim 1, wherein the locking fastener is filled with micro-expansion cement paste, the inter-pipe space and the pipe are filled with self-compacting concrete, and the left and right of the lowest steel pipe and the soil body below the steel pipe are grouted and reinforced at the n-shaped structural support leg to form an external reinforced soil body.
5. The shallow pipe curtain supporting system as claimed in claim 4, wherein 4 grouting holes are arranged on the same grouting plane, the included angles between the circle center corresponding to the grouting holes and the transverse connection direction are respectively 0 degree, 90 degree, 180 degree and 270 degree, and the aperture of each grouting hole is 30-50 mm.
6. A construction method of a shallow buried pipe curtain supporting system as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
s1, designing a pipe curtain supporting system according to engineering requirements, determining the sizes, the numbers and the positions of the steel pipes, the upper flange plate, the lower flange plate, the lock catches, the large rib plates and the small rib plates, processing and forming steel materials in a factory, and completing the assembly of the steel pipes and corresponding components through welding;
s2, excavating a vertical shaft at the construction position, arranging a counterforce wall, and building a construction platform;
s3, erecting pipe jacking equipment, installing a horizontal directional drilling machine, and completing construction of a guide hole;
s4, performing pipe jacking construction of the first steel pipe and the second steel pipe of the n-shaped structure layer by layer according to the sequence from top to bottom; the first steel pipe and the second steel pipe are alternatively pushed in, and when two adjacent steel pipes are pushed in, the upper flange plate of the second steel pipe is connected with the upper flange plate of the first steel pipe through a lock catch; grouting and drag reduction are carried out while pipe jacking construction is carried out;
s5, after the steel pipe at the lowest support leg of the system is jacked, grouting and reinforcing the left, right and lower soil bodies of the system;
s6, after soil around the supporting legs is reinforced, firstly, cleaning soil between the lock catches, and injecting micro-expansion cement slurry after the soil between the lock catches is emptied; after the micro-expansion cement paste reaches the designed strength, clearing soil between pipes, and injecting self-compacting concrete after the soil between pipes is cleared; after the concrete among the pipes reaches the design strength, clearing the soil in the pipes, and injecting self-compacting concrete after the soil in the pipes is emptied;
and S7, sequentially welding the lower flange plates of the two adjacent steel pipes along with excavation of the cavern.
7. The construction method of the shallow pipe curtain supporting system according to claim 6, wherein the soil cleaning among the lock catches, the soil cleaning in the pipe and the soil cleaning in the pipe are carried out by using a high-pressure water gun and matching with a sand sucker or a horizontal spiral drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910108587.0A CN109653772B (en) | 2019-02-03 | 2019-02-03 | Shallow buried pipe curtain supporting system and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910108587.0A CN109653772B (en) | 2019-02-03 | 2019-02-03 | Shallow buried pipe curtain supporting system and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109653772A CN109653772A (en) | 2019-04-19 |
| CN109653772B true CN109653772B (en) | 2020-07-21 |
Family
ID=66121259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910108587.0A Expired - Fee Related CN109653772B (en) | 2019-02-03 | 2019-02-03 | Shallow buried pipe curtain supporting system and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109653772B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145338B (en) * | 2019-05-30 | 2020-08-14 | 东北大学 | Construction method of support system of occlusion type pipe curtain structure |
| CN110410091A (en) * | 2019-07-29 | 2019-11-05 | 东北大学 | A kind of New pipe curtain structure being laid with underground utilities and its construction method |
| CN110952993B (en) * | 2019-11-19 | 2021-03-16 | 东北大学 | Semi-assembly type pipe curtain structure based on steel reinforced concrete connection and construction process |
| CN111305093A (en) * | 2020-03-03 | 2020-06-19 | 西南交通大学 | Self-unloading steel corrugated plate arch culvert |
| CN111577338A (en) * | 2020-04-28 | 2020-08-25 | 广东省基础工程集团有限公司 | Tunnel auxiliary supporting structure and construction method |
| CN111485549A (en) * | 2020-04-30 | 2020-08-04 | 广西路建工程集团有限公司 | Rotary drilling and buried drilling treatment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321659A (en) * | 2013-07-22 | 2013-09-25 | 中铁隧道集团有限公司 | Large-diameter tube curtain support underground excavation construction super-shallow burying large-section subway station structure and construction method |
| CN106089243A (en) * | 2016-06-12 | 2016-11-09 | 东北大学 | A kind of pipe curtain supporting construction connected based on concrete filled steel tube |
| CN106761768A (en) * | 2016-11-10 | 2017-05-31 | 东北大学 | A kind of novel steel tube curtain structure support system and its construction method |
| CN206360705U (en) * | 2017-01-05 | 2017-07-28 | 中铁七局集团第三工程有限公司 | The major diameter New pipe curtain supporting construction constructed for underground digging in subway station |
| 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 |
| CN108049891A (en) * | 2017-12-08 | 2018-05-18 | 东北大学 | For building the rectangular steel pipe support system of underground engineering with shallow and its construction method |
| CN108278116A (en) * | 2018-01-22 | 2018-07-13 | 东北大学 | A kind of Shallow Large Span pipe curtain support system and its construction method |
-
2019
- 2019-02-03 CN CN201910108587.0A patent/CN109653772B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321659A (en) * | 2013-07-22 | 2013-09-25 | 中铁隧道集团有限公司 | Large-diameter tube curtain support underground excavation construction super-shallow burying large-section subway station structure and construction method |
| CN106089243A (en) * | 2016-06-12 | 2016-11-09 | 东北大学 | A kind of pipe curtain supporting construction connected based on concrete filled steel tube |
| CN106761768A (en) * | 2016-11-10 | 2017-05-31 | 东北大学 | A kind of novel steel tube curtain structure support system and its construction method |
| CN206360705U (en) * | 2017-01-05 | 2017-07-28 | 中铁七局集团第三工程有限公司 | The major diameter New pipe curtain supporting construction constructed for underground digging in subway station |
| 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 |
| CN108049891A (en) * | 2017-12-08 | 2018-05-18 | 东北大学 | For building the rectangular steel pipe support system of underground engineering with shallow and its construction method |
| CN108278116A (en) * | 2018-01-22 | 2018-07-13 | 东北大学 | A kind of Shallow Large Span pipe curtain support system and its construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109653772A (en) | 2019-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109653772B (en) | Shallow buried pipe curtain supporting system and construction method thereof | |
| KR20210130725A (en) | Reinforcement device and method for local freezing reinforcement in deep pits in gravel strata containing large amounts of water | |
| CN108677924B (en) | Double-row miniature steel pipe pile grouting wall-forming partition structure and method | |
| US11384502B2 (en) | Concrete inside interface processing structure and method for secant pile construction | |
| CN111779510B (en) | Primary support invasion limit arch changing method for high liquid limit red clay surrounding rock tunnel | |
| CN110331727B (en) | Support structure combining cast-in-place pile and underground diaphragm wall and construction method | |
| CN103306289A (en) | Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof | |
| CN108316670B (en) | Steel pipe underpinning construction method under existing building foundation | |
| CN108239984A (en) | The assembled building enclosure and its construction method that terraced corrugated sheet steel is combined with steel truss | |
| CN208702421U (en) | The tunnel support structure of existing pile foundation building is worn under a kind of | |
| CN114412509A (en) | Support method suitable for large deformation of mudstone tunnel | |
| CN217629964U (en) | Basement deep foundation pit replacement support | |
| CN216973425U (en) | Inclined prefabricated steel pile foundation pit supporting system capable of being supported and excavated firstly | |
| CN105113513A (en) | Anti-seepage foundation pit supporting structure and construction method | |
| CN113404060A (en) | Rigid rib wall type pile wall foundation pit supporting structure and construction method | |
| CN114108653A (en) | Supporting structure for preventing large-area continuous collapse of foundation pit enclosure and construction method | |
| CN113685191A (en) | Method for treating collapse of carbonaceous slates in water during tunnel excavation | |
| CN109653193B (en) | Reverse construction method for underground continuous wall | |
| CN215801664U (en) | Rigid rib wall type pile wall foundation pit supporting structure | |
| CN212896374U (en) | Foundation pit support structure located in underground space of existing building | |
| CN113404055B (en) | Inter-pile soil-retaining and water-stopping curtain structure and construction method thereof | |
| KR100515971B1 (en) | Soil retaining method using H-pile having large section | |
| CN114198116B (en) | Pipe curtain box culvert integration tunnel structure with connect and strengthen | |
| CN218027709U (en) | Foundation pit supporting structure | |
| CN114086563B (en) | Construction method for improving bearing capacity of soil body right above shallow tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200721 |