CN118008324A - Foundation reinforcing device for tunnel penetrating through soft soil stratum - Google Patents
Foundation reinforcing device for tunnel penetrating through soft soil stratum Download PDFInfo
- Publication number
- CN118008324A CN118008324A CN202410274524.3A CN202410274524A CN118008324A CN 118008324 A CN118008324 A CN 118008324A CN 202410274524 A CN202410274524 A CN 202410274524A CN 118008324 A CN118008324 A CN 118008324A
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- Prior art keywords
- pipe
- tunnel
- arc
- fixedly connected
- foundation
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- Pending
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- 239000002689 soil Substances 0.000 title claims abstract description 44
- 230000003014 reinforcing effect Effects 0.000 title claims description 11
- 230000000149 penetrating effect Effects 0.000 title abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000003860 storage Methods 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 6
- 230000008093 supporting effect Effects 0.000 description 6
- 239000000725 suspension Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a foundation reinforcement device for a tunnel penetrating through a soft soil stratum, which comprises a plurality of pile pipes, wherein a separation device is arranged in the middle of each pile pipe, and the separation devices of the pile pipes are arranged in a manner that the heights of the separation devices of the pile pipes are corresponding to the sections of the tunnel in an avoidance manner. According to the shield cutter head, all the arc-shaped plates move inwards, the clamping blocks are separated from the clamping grooves, and the arc-shaped plates with the reduced outer outline can be pulled out from the upper end pipe, so that obstacles on a path of the shield cutter head can be removed, and abrasion of the cutter head is reduced.
Description
Technical Field
The invention relates to the technical field of soft soil foundation reinforcement, in particular to a foundation reinforcement device for tunnel crossing soft soil stratum.
Background
The silt weak soil stratum in coastal areas of China is widely distributed, and the stratum generally has obvious characteristic of three highs, three lows, namely: high water content, high compressibility, high sensitivity, low strength, low density, low permeability. In the stratum, the stratum cannot provide enough resistance for the tunnel, the later-period peripheral development activities are frequent, and the tunnel is easy to generate the problems of large deformation and large sedimentation. Therefore, the tunnel section built in the deep soft soil layer is generally reinforced with the foundation.
Patent CN107524144a discloses a reinforcement system and reinforcement method for soft soil foundation before tunnel excavation; when the shield machine passes through, abrasion to the shield cutterhead is aggravated, so that the shield machine is difficult to tunnel.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a foundation reinforcement device for a tunnel penetrating through a soft soil stratum.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a tunnel passes through foundation stabilization device in weak soil stratum, includes a plurality of stake pipes, and every stake pipe middle part is equipped with separator, and the separator of a plurality of stake pipes highly corresponds the tunnel section and dodges the setting.
Preferably, the pile pipe comprises an upper pipe and a lower pipe, and clamping grooves are respectively arranged at the lower end of the inner cavity of the upper pipe and the upper end of the inner cavity of the lower pipe;
The separating device comprises a hanging rod, a threaded section is arranged at the upper end of the hanging rod, a sleeve is arranged outside the hanging rod and in threaded connection with the upper end of the hanging rod, a circular ring is arranged at the lower end of the sleeve, a plurality of cross rods are fixedly connected at the lower end of the hanging rod in an array mode, each cross rod is slidably connected with a sliding sleeve, one end of each sliding sleeve is fixedly connected with an arc-shaped plate, all the arc-shaped plates can be spliced to form cylindrical structures with different sizes, the upper sides of the sliding sleeves are hinged to a supporting rod, and the upper ends of the supporting rods are hinged to the circular ring;
The upper end and the lower extreme of arc in the arc are fixed connection riser respectively, riser fixed connection fixture block, fixture block and draw-in groove correspond the setting.
Preferably, the side surfaces of two adjacent arc plates are alternately provided with the notch and the convex block, and a slurry outlet is formed between the convex block and the notch.
Preferably, one of the arc plates is provided with a storage groove on the outer arc surface, the storage groove is rotationally connected with an arc-shaped elastic steel bar, the lower end of the upper end pipe is provided with a sliding groove, the upper end of the arc plate is in a step shape and is elastically limited in the sliding groove, and the lower ends of the adjacent upper end pipes are provided with clamping grooves.
Preferably, the bottom of the arc plate is fixedly connected with a cylinder, the end of the cylinder is fixedly connected with a steel ball, a rubber layer is arranged on the outer side of the steel ball, and the steel ball is in spherical hinge joint with the bottom of the storage groove.
Preferably, the bottom of the lower pipe is provided with a blade, and the lower pipe is provided with a grouting hole.
Preferably, the upper side of the pile pipe is in threaded connection with an end cover, and the end cover is fixedly connected with the grouting pipe and the slurry discharging pipe.
Preferably, the upper end of the pile pipe is fixedly connected with a bracket, and the upper side of the bracket is fixedly connected with a mounting handle.
The invention has the advantages that: according to the foundation reinforcement device for tunnel crossing soft soil stratum, the pile pipe is drilled into soft soil in tunnel crossing region, so that on one hand, the pile pipe can squeeze soil to compact the soil, on the other hand, the conventional grouting technology is adopted to solidify the soil at the soft soil position, hardening of the soil by the hardening agent takes time, and abrasion of the hardened soil and the pile on the shield cutter disc is aggravated; the separating device with the corresponding height is arranged on the section of the tunnel, and the separating device is separated from the middle part of the pile pipe, so that cutter abrasion is reduced when the shield cutterhead advances and cuts, and the effect of reinforcing the foundation and not seriously influencing the construction period is achieved.
According to the invention, the sleeve is lifted relative to the suspender, the ring at the lower end of the sleeve is lifted, the sliding sleeve is pulled by the support rod to slide along the cross rod to the suspender, so that all the arc plates move inwards, meanwhile, the clamping blocks are separated from the clamping grooves, the arc plates with the reduced outer profile can be pulled out from the upper end pipe, and therefore, the shield cutterhead can remove obstacles on a route, and the abrasion of the cutterhead is reduced.
According to the invention, the arc-shaped plates move inwards, the elastic steel bars elastically prop against the sliding-out grooves and gradually become arc-shaped, and can be lifted upwards to leave the upper end pipes after all the arc-shaped plates shrink, and the elastic steel bars are inserted into the clamping grooves obliquely upwards along the sliding-out grooves under the upward pushing action of the storage grooves, so that adjacent upper end pipes are sequentially connected together to form grids, and the risk of soil settlement above a tunnel is reduced.
Drawings
FIG. 1 is a schematic view of the basic structure of the present invention;
FIG. 2 is a schematic view of a partial structure of a separating apparatus of the present invention;
FIG. 3 is a schematic view showing the overall outer diameter of the arc plate of the separating device in the invention after being reduced;
FIG. 4 is an enlarged view of a portion at E in FIG. 3;
fig. 5 is a schematic view of the position distribution of a plurality of pile pipes relative to a tunnel section according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, the foundation reinforcement device for tunnel crossing soft soil stratum provided by the invention comprises a plurality of pile pipes 1, wherein a separation device 2 is arranged in the middle of each pile pipe 1, and the separation devices 2 of the pile pipes 1 are arranged at the height corresponding to the tunnel section avoidance.
The pile tube 1 comprises an upper end tube 11 and a lower end tube 12, clamping grooves 13 are respectively formed in the lower end of the inner cavity of the upper end tube 11 and the upper end of the inner cavity of the lower end tube 12, a blade part 14 is arranged at the bottom of the lower end tube 12, a grouting hole 15 is formed in the lower end tube 12, an end cover 16 is connected to the upper side of the pile tube 1 in a threaded manner, the end cover 16 is fixedly connected with a grouting tube 17 and a grouting tube 18, a hardening agent is sprayed into soil around the pile tube 1 in the process of drilling the pile tube 1 by using the construction technology of a bored pile, the upper end of the pile tube 1 is fixedly connected with a bracket 19 through bolts, the subsequent disassembly is facilitated, and the upper side of the bracket 19 is fixedly connected with a mounting handle 191;
According to the invention, the pile pipe 1 is drilled into soft soil in a tunnel passing area in a drilling mode in the prior art, on one hand, the pile pipe 1 presses the soil body to compact the soil body, on the other hand, the soil body at the soft soil position is solidified by a conventional grouting technology, the hardening agent needs time for hardening the soil body, and after hardening, the abrasion of the shield cutter disc by the pile column is aggravated;
according to the invention, after the hardening agent is hardened in an initial stage (the strength of the hardened soil body can be obtained through laboratory simulation), as shown in fig. 5, a separating device 2 with a corresponding height is arranged for the tunnel section 10 and is separated from the middle part of the pile pipe 1, so that the cutter abrasion is reduced during the forward cutting of the shield cutter head, and the effect of reinforcing the foundation without seriously affecting the construction period is achieved.
As a specific embodiment of the invention, the separating device 2 comprises a suspension rod 21, the upper end of the suspension rod 21 is provided with a thread section, the outside of the suspension rod 21 is provided with a sleeve 22, the sleeve 22 is in threaded connection with the upper end of the suspension rod 21, the lower end of the sleeve 22 is provided with a circular ring 23, the lower end of the suspension rod 21 is fixedly connected with a plurality of cross rods 24 in an array manner, each cross rod 24 is slidably connected with a sliding sleeve 25, one end of the sliding sleeve 25 is fixedly connected with an arc plate 26, all the arc plates 26 can be spliced to form cylindrical structures with different sizes, the upper side of the sliding sleeve 25 is hinged with a supporting rod 27, and the upper end of the supporting rod 27 is hinged with the circular ring 23;
The upper end and the lower end of the inner cambered surface of the arc plate 26 are respectively and fixedly connected with a vertical plate 28, the vertical plate 28 is fixedly connected with a clamping block 29, and the clamping block 29 is correspondingly arranged with the clamping groove 13.
When the pile pipe 1 is used, the pile pipe 1 is integrally sunk into the soil body, after the initial reinforcement strength of the soil body meets the test requirement, the boom 21 is clamped and fixed through the hydraulic device, the sleeve 22 is clamped and rotated through the hydraulic wrench, the sleeve 22 rotates relative to the boom 21, the sleeve 22 rises relative to the boom 21 under the action of the threaded structure, the ring 23 at the lower end of the sleeve 22 rises, the sliding sleeve 25 is pulled by the supporting rod 27 to slide along the cross rod 24 to the boom 21, so that all arc plates 26 move inwards, meanwhile, the clamping blocks 29 are separated from the clamping grooves 13, the arc plates 26 with the reduced outer profile can be pulled out outwards through the upper end pipe 11, and therefore obstacles on a path of a shield cutter head can be removed, and abrasion of the cutter head is reduced.
As a further embodiment of the present invention, the side surfaces of two adjacent arc plates 26 are alternately provided with the notch 261 and the projection 262, and a slurry outlet 263 is formed between the projection 262 and the notch 261; the lug 262 and the notch 261 are mutually crossed, so that a good supporting effect can be achieved on the axial direction of the pile pipe 1, the pile pipe 1 is high in integrity, the pile pipe 1 is convenient to drill into a soil body in the same construction mode as a conventional pile, after the pile pipe 1 enters a preset depth, all arc plates 26 move towards the suspender 21, the profile on the outermost side is contracted, and finally all the pile pipe can be pulled out by the upper end pipe 11, so that the pile pipe is convenient to reuse, and the upper end pipe 11 and the lower end pipe 12 are independently reserved in the soil body to achieve permanent reinforcement.
As a further embodiment of the present invention, the outer arc surface of one of the arc plates 26 is provided with a storage groove 3, the storage groove 3 is rotationally connected with the arc-shaped elastic steel bar 4, the lower end of the upper end pipe 11 is provided with a sliding groove 41, the upper end of the arc plate 26 is in a step shape and is elastically limited in the sliding groove 41, and the lower end of the adjacent upper end pipe 11 is provided with a clamping groove 42.
Specifically, arc 26 bottom fixed connection cylinder 43, cylinder 43 end fixed connection steel ball, the steel ball outside sets up rubber layer 44, the steel ball is spherical articulated with the tank bottom of storage tank 3, go into the ball inslot of storage tank 3 through the elasticity card of rubber layer 44 and can break away from through pulling finally, in the pulling process, when elastic steel strip 4 front end runs into rubble or hard piece in weak soil, the change of the advancing direction of elastic steel strip 4 of being convenient for, when can't align to the joint inslot 42 of adjacent upper end pipe 11, also can prevent the subsidence of upper end pipe 11 and consolidate the joint strength of upper end pipe 11 and soil body through forming the branch in self upper end pipe 11 lower extreme.
When the embodiment works, as the separate upper end pipe 11 has the risk of sinking in soil after the separating device 2 is removed, the separating device 2 is taken as a modularized unit, the pile pipe 1 is assembled, the elastic steel bar 4 is pressed in the storage groove 3, the upper end of the elastic steel bar 4 is positioned in the sliding-out groove 41 and then is plugged into the upper end pipe 11, the lower end pipe 12 is placed in a preset position and then descends relative to the suspender 21 through the sleeve 22, so that all the arc plates 26 move outwards, and the upper end pipe 11 and the lower end pipe 12 are clamped at two ends of the separating device 2;
when needs separation, arc 26 inwards move, and elasticity steel strip 4 elasticity is against roll-off groove 41 and becomes the arc gradually, can upwards promote to leave upper end pipe 11 after the shrink of whole arc 26, and elasticity steel strip 4 upwards promotes the effect through storage tank 3, inserts along roll-off groove 41 to the joint groove 42 on the slope for adjacent upper end pipe 11 connects gradually together and forms the net, reduces the risk that tunnel top soil body subsides, and elasticity steel strip 4 makes and forms the passageway between the adjacent upper end pipe 11, makes things convenient for secondary slip casting thick liquid to flow along elasticity steel strip 4 periphery for two adjacent upper end pipes 11 are whole after the solidification.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a tunnel passes through foundation stabilization device in weak soil stratum, includes a plurality of stake pipes (1), its characterized in that: the middle part of each pile pipe (1) is provided with a separating device (2), and the heights of the separating devices (2) of the pile pipes (1) correspond to the tunnel section to avoid.
2. A device for reinforcing a foundation of a tunnel through a soft soil layer as claimed in claim 1, wherein: the pile pipe (1) comprises an upper end pipe (11) and a lower end pipe (12), and clamping grooves (13) are respectively formed in the lower end of an inner cavity of the upper end pipe (11) and the upper end of an inner cavity of the lower end pipe (12);
The separating device (2) comprises a hanging rod (21), a threaded section is arranged at the upper end of the hanging rod (21), a sleeve (22) is arranged outside the hanging rod (21), the sleeve (22) is in threaded connection with the upper end of the hanging rod (21), a circular ring (23) is arranged at the lower end of the sleeve (22), a plurality of cross rods (24) are fixedly connected at the lower end of the hanging rod (21) in an array mode, each cross rod (24) is slidably connected with a sliding sleeve (25), one end of each sliding sleeve (25) is fixedly connected with an arc-shaped plate (26), all the arc-shaped plates (26) can be spliced to form cylindrical structures with different sizes, a connecting strut (27) is hinged to the upper side of each sliding sleeve (25), and the upper ends of the struts (27) are hinged to the circular ring (23);
The upper end and the lower end of the inner cambered surface of the arc-shaped plate (26) are respectively and fixedly connected with a vertical plate (28), the vertical plate (28) is fixedly connected with a clamping block (29), and the clamping block (29) is correspondingly arranged with the clamping groove (13).
3. A device for reinforcing a foundation of a tunnel through a soft soil layer as claimed in claim 2, wherein: the side surfaces of two adjacent arc plates (26) are alternately provided with notches (261) and lugs (262), and slurry outlets (263) are formed between the lugs (262) and the notches (261).
4. A device for reinforcing a foundation of a tunnel through a soft soil layer as claimed in claim 2, wherein: one of the arc plates (26) is provided with a storage groove (3), the storage groove (3) is rotationally connected with an arc-shaped elastic steel bar (4), the lower end of an upper end pipe (11) is provided with a sliding-out groove (41), the upper end of the arc plate (26) is in a step shape and is elastically limited in the sliding-out groove (41), and the lower ends of adjacent upper end pipes (11) are provided with clamping grooves (42).
5. A device for reinforcing a foundation of a tunnel through a soft soil layer as set forth in claim 4, wherein: the bottom of the arc plate (26) is fixedly connected with a cylinder (43), the end of the cylinder (43) is fixedly connected with a steel ball, a rubber layer (44) is arranged on the outer side of the steel ball, and the steel ball is in spherical hinge joint with the bottom of the storage groove (3).
6. A device for reinforcing a foundation of a tunnel through a soft soil layer as claimed in claim 2, wherein: the bottom of the lower end pipe (12) is provided with a blade part (14), and the lower end pipe (12) is provided with a grouting hole (15).
7. A device for reinforcing a foundation of a tunnel through a soft soil layer as claimed in claim 1, wherein: the upper side of the pile pipe (1) is in threaded connection with an end cover (16), and the end cover (16) is fixedly connected with a grouting pipe (17) and a slurry discharging pipe (18).
8. A device for reinforcing a foundation of a tunnel through a soft soil layer as claimed in claim 1, wherein: the upper end of the pile pipe (1) is fixedly connected with a support (19), and the upper side of the support (19) is fixedly connected with a mounting handle (191).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410274524.3A CN118008324A (en) | 2024-03-11 | 2024-03-11 | Foundation reinforcing device for tunnel penetrating through soft soil stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410274524.3A CN118008324A (en) | 2024-03-11 | 2024-03-11 | Foundation reinforcing device for tunnel penetrating through soft soil stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118008324A true CN118008324A (en) | 2024-05-10 |
Family
ID=90950578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410274524.3A Pending CN118008324A (en) | 2024-03-11 | 2024-03-11 | Foundation reinforcing device for tunnel penetrating through soft soil stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118008324A (en) |
-
2024
- 2024-03-11 CN CN202410274524.3A patent/CN118008324A/en active Pending
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