CN217582161U - Middle bulkhead supporting structure - Google Patents
Middle bulkhead supporting structure Download PDFInfo
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- CN217582161U CN217582161U CN202220767002.3U CN202220767002U CN217582161U CN 217582161 U CN217582161 U CN 217582161U CN 202220767002 U CN202220767002 U CN 202220767002U CN 217582161 U CN217582161 U CN 217582161U
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Abstract
The utility model discloses a well next door supporting construction relates to tunnel construction technical field. The middle partition wall is longitudinally connected with the arch crown and the inverted arch; the middle partition comprises a middle partition protection substrate and a steel bar assembly; the steel bar assembly comprises a plurality of rows of vertical main bars which are longitudinally and symmetrically distributed, and the vertical main bars penetrate through the middle partition wall; the arch crown is internally provided with arch crown embedded steel bars, the inverted arch embedded steel bars are arranged inside the inverted arch, and two ends of the vertical main steel bars are fixedly connected with the arch crown embedded steel bars and the inverted arch embedded steel bars through connectors respectively. The utility model discloses well next door protection basement has established very strong bonding degree with the reinforcing bar subassembly, strengthens resistance to compression and tensile strength, improves next door's bearing capacity, and the basis bearing capacity is not enough problem is solved to the embedded bar, reduces to sink, increases the support resistance of bottom, has further improved next door's fastness.
Description
Technical Field
The utility model relates to a tunnel construction technical field especially relates to a well next door supporting construction.
Background
The tunnel construction process usually adopts a middle partition wall method or a crossed middle partition wall method to carry out tunnel excavation, the middle partition wall method is to divide a tunnel into a left part and a right part to carry out excavation, firstly, the tunnel is excavated in layers from top to bottom by adopting a step method on one side of the tunnel, and when primary support on the side is finished, the other side of the tunnel is excavated in layers, and the number of times of distribution and the support form are the same as those of the side which is excavated in advance. The construction principle of the cross intermediate partition method is the same as that of the intermediate partition method, a large-section tunnel is divided into two halves for construction through the partition of the intermediate partition, the span of the tunnel is reduced, meanwhile, three-step cross construction is adopted on two sides of the divided tunnel, the section of the tunnel is generally divided into 4-6 parts from the middle, the left and right parts of an upper step and a lower step are respectively divided into 2-3 parts, and each part is excavated and supported to form an independent closed unit.
When adopting well partition method or alternately well partition method, the intermediate wall can be regarded as an artifical support, and the atress changes and has the effect of bearing unidirectional unbalance force in the work progress, takes place unstability and destruction easily, consequently, the intermediate wall plays crucial effect to the support of country rock and the stability of main hole lining structure, guarantees that the support stability of intermediate wall has become a crucial big problem.
Chinese patent with application number CN201710994428.6 discloses a prefabricated intermediate wall structure of a subway tunnel, which comprises tunnel segments, a prefabricated intermediate wall, a clamping groove member, high-strength bolts and elastic fireproof sealant; a clamping groove component is fixedly arranged at the top end of the interior of the tunnel segment, the top of the tunnel segment is connected with the top of the prefabricated middle partition wall structure through the clamping groove component, and a gap between the prefabricated middle partition wall structure and the clamping groove component is sealed by elastic fireproof sealant; the lower part of the tunnel segment is fixedly connected with the tunnel segment and the prefabricated intermediate wall through high-strength bolts. The invention can better reduce the stress concentration phenomenon of the mid-board, is convenient for assembly construction, but has insufficient connection rigidity, and in a tunnel with complex geological conditions, the crack development is easy to occur in the slot component area, and the stability needs to be further improved.
Chinese patent with application number cn202110967859.X discloses an assembled mid-partition of an arch-linked tunnel and a construction method, wherein the mid-partition structure adopts a plurality of prefabricated blocks to assemble and form, need not to use the partition template, save the on-site working time, improve the efficiency of construction, but adopt arc bolted connection and 'fix between the upper and lower adjacent prefabricated blocks, possess certain potential safety hazard, and the prefabricated block is equipped with horizontal steel bar sleeve and vertical steel bar sleeve, the horizontal steel bar and the vertical steel bar that are used for inserting the secondary lining of the same side main hole respectively and link firmly, there is the clearance between reinforcing bar and the prefabricated block, can't guarantee the structural safety performance.
At present, the middle partition wall occupies a large space in the middle pilot tunnel, so that a supporting structure is required to be provided during construction of the middle partition wall, the construction quality of the middle partition wall to the depth can be guaranteed, and the middle partition wall supporting structure with a stable structure is formed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a middle bulkhead supporting structure.
The utility model adopts the technical proposal that:
a middle bulkhead supporting structure comprises a middle bulkhead, wherein the top end and the bottom end of the middle bulkhead are respectively connected with an arch crown and an inverted arch;
the middle partition comprises a middle partition protective base and a steel bar assembly;
the steel bar assembly comprises a plurality of rows of vertical main bars which are longitudinally and symmetrically distributed, and the vertical main bars penetrate through the middle partition wall; the arch crown is internally provided with arch crown embedded steel bars, inverted arch embedded steel bars are arranged inside the inverted arches, and two ends of each vertical main bar are fixedly connected with the arch crown embedded steel bars and the inverted arch embedded steel bars through connectors respectively. The reinforcing bars are laid in the inverted arch and the arch crown, foundation bearing capacity can be solved to the inverted arch embedded reinforcing bars insufficiently, subsidence is reduced, support resistance of the bottom is increased, the arch crown embedded reinforcing bars increase supporting force of the top and the wall portion, the two ends of the vertical main reinforcing bars are respectively connected with the arch crown embedded reinforcing bars and the inverted arch embedded reinforcing bars fixedly connected, concrete is poured outside to enable the middle partition wall to be combined with the arch crown and the inverted arch together, and the structure is stable.
Preferably, the inverted arch comprises an inverted arch filling layer and two lining inverted arch layers from inside to outside, the arch top comprises two lining inner side protection layers, two lining intermediate layers and two lining outer side protection layers from inside to outside in sequence, and the two lining inverted arches and the two lining intermediate layers are connected into a whole. The structure adapts to different surrounding rock levels, the arch crown and the inverted arch are finally connected into a whole to bear the pressure generated by external deformation, the inverted arch of the inverted arch is filled with concrete, the surface is smooth, and subsequent traffic and future track laying are facilitated.
Preferably, the inverted arch embedded steel bars and the arch crown embedded steel bars are respectively distributed in the two lining inverted arches and the two lining middle layers. The bearing capacity of the supporting structure and the mechanical property of supporting materials are fully exerted, and the structure is stable.
Preferably, the inverted arch embedded steel bars are L-shaped, and are oppositely and symmetrically arranged inside the two lining inverted arches.
Preferably, the vault embedded steel bars are U-shaped, the openings of the vault embedded steel bars face the two lining inner side protective layers, and the two ends of the vault embedded steel bars are embedded into the two lining inner side protective layers and are connected with the connectors.
Preferably, the steel bar assembly further comprises a plurality of layers of transverse main bars and tie bars, wherein the transverse main bars are perpendicular to the vertical main bars; the lacing wires are arranged at the intersection points of the transverse main ribs and the vertical main ribs in a quincunx manner. The lacing wires are arranged at the intersection points of the transverse main ribs and the vertical main ribs in a quincunx manner. The well next door protection basement forms for concrete placement, and vertically and horizontally staggered is the rectangle setting between vertical main muscle, horizontal main muscle and the lacing wire and in the well next door protection basement of well next door, and the lacing wire adopts the plum blossom shape to lay simultaneously horizontal main muscle with the cross point department of vertical main muscle makes horizontal main muscle with connection between the vertical main muscle is more firm, has further improved the fastness of well next door.
Preferably, a plurality of stirrups are bound on the two layers of the transverse main reinforcements on the top of the middle partition wall along the longitudinal direction of the transverse main reinforcements.
Preferably, the layer spacing between the transverse main ribs is 150-200mm.
Preferably, the protecting substrate of the middle partition wall is provided with a plurality of deformation joints. The middle partition wall is prevented from being deformed under the action of external factors to cause cracking and even damage, and a certain deformation joint is reserved to play a role in preventing uneven settlement of a building or preventing vibration.
Preferably, the distance between the deformation joints is 30 meters, and the width of the deformation joints is 2 centimeters.
Preferably, the anchoring length of the rebar assembly is 1.6Lae. The firmness of the member is ensured, and the mechanical engaging force of the reinforcing steel bars and the concrete is enhanced.
Compared with the prior art, the beneficial effects of the utility model are that:
the top end and the bottom end of the middle partition wall are respectively connected with the arch crown and the inverted arch, so that the integration of the middle partition wall is realized, and the integral stress performance and the anti-seismic performance of the middle partition wall are ensured; the middle partition comprises a middle partition protection substrate and a steel bar assembly; the steel bar assembly comprises a plurality of rows of vertical main bars which are longitudinally and symmetrically distributed, and the vertical main bars penetrate through the middle partition wall; the protecting substrate of the middle partition wall is made of concrete, strong bonding degree is established with the steel bar assembly, complementary effect is generated, compression strength and tensile strength are enhanced, and bearing capacity of the middle partition wall is improved. The arch crown is internally provided with arch crown embedded steel bars, the inverted arch embedded steel bars are arranged inside the inverted arch, and two ends of the vertical main steel bars are fixedly connected with the arch crown embedded steel bars and the inverted arch embedded steel bars through connectors respectively. The existence of vault embedded steel bar and inverted arch embedded steel bar solves the insufficient problem of foundation bearing capacity, reduces and sinks, increases the support resistance of bottom, has further improved the fastness of well next door.
Drawings
Fig. 1 is a schematic view of a middle partition wall supporting structure provided by the present invention;
fig. 2 is a schematic view of a reinforcing bar assembly of a partition wall supporting structure provided by the present invention;
reference numerals are as follows:
1-a middle barrier protection substrate; 2-vertical main reinforcement; 3-transverse main reinforcement; 4-stretching the ribs; 5-an inverted arch filling layer;
6-two lining inverted arch layers; 7-lining an inner side protective layer; 8-two lining intermediate layer; 9-lining an outer protective layer;
10-vault embedded steel bar; 11-embedding reinforcing steel bars in an inverted arch; 12-a docking device; 13-stirrup.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the embodiments of the present invention will be combined with the following, which is to clearly and completely describe the technical solution of the present invention.
In the description of the present application, it is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing and simplifying the present application, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present application.
As shown in fig. 1 and 2, a middle partition wall supporting structure is characterized in that:
the middle partition wall is at least 200mm in width and longitudinally connects the arch crown and the inverted arch crown;
the inverted arch comprises inverted arch filling 5 and two lining inverted arches 6 from inside to outside, the arch crown sequentially comprises two lining inner side protective layers 7, two lining intermediate layers 8 and two lining outer side protective layers 9 from inside to outside, and the two lining inverted arches 6 and the two lining intermediate layers 8 are connected into a whole. The vault adopts the structure of combined type lining cutting, and outmost two lining outside protective layers 9 that are, two lining outside protective layers 9 have played the effect of preliminary bracing, allow the external world to appear great restraint deformation, can absorb deformation pressure, stabilize the cave wall, form the support system with external country rock jointly, be two lining intermediate levels 8 with two lining outside protective layers 9 meet, two lining inside protective layers 7 promptly, two lining intermediate levels 8 bear the pressure that the country rock residual deformation produced jointly with two lining outside protective layers 9, bear the pressure that external condition worsens the production jointly. The two-lining outer side protective layer 9 adopts an anchor rod supporting structure mostly, and the two-lining middle layer 8 generally adopts waterproof concrete.
The inverted arch comprises an inverted arch filling 5 and a second-lining inverted arch 6 from inside to outside, the thickness of the second-lining inverted arch 6 is at least 550mm, the second-lining inverted arch 6 is made of lining materials and has enough strength, durability and impermeability, the inverted arch filling 5 of the inverted arch is filled with concrete, in the embodiment, C35 concrete is adopted, and after final setting, the concrete has high compressive strength and is convenient for subsequent traffic and future track laying.
The arch crown is internally provided with arch crown embedded bars 10, the inverted arch is internally provided with inverted arch embedded bars 11, and two ends of the vertical main bars 2 are fixedly connected with the arch crown embedded bars 10 and the inverted arch embedded bars 11 through connectors 12 respectively. In the construction process, a scaffold is erected, reinforcing steel bars and templates in the intermediate wall are installed in sections and poured in sections, the number of layered pouring times is determined according to the clearance height of the section of the tunnel, and the pouring height is not more than 5m each time. The reinforcing bars are laid in the inverted arch and the arch crown, foundation bearing capacity can be solved inadequately by the inverted arch embedded reinforcing bars 11, subsidence is reduced, supporting resistance of the bottom is increased, supporting capacity of the top and the wall portion is increased by the arch crown embedded reinforcing bars 10, two ends of the vertical main bars 2 are respectively connected with the arch crown embedded reinforcing bars 10 and the inverted arch embedded reinforcing bars 11 in a fixed connection mode, concrete is poured from the outside to enable the middle partition wall to be combined with the arch crown and the inverted arch together, and the structure is stable. The inverted arch embedded steel bars 11 and the arch crown embedded steel bars 10 are respectively distributed in the two lining inverted arches 6 and the two lining middle layers 8.
The inverted arch embedded steel bars 11 are L-shaped, and the inverted arch embedded steel bars 11 are arranged inside the two lining inverted arches 6 in an opposite symmetrical mode. The vault embedded steel bar 10 is U-shaped, the opening of the vault embedded steel bar faces to the two lining inner side protective layers 7, and two ends of the vault embedded steel bar 10 are embedded into the two lining inner side protective layers 7 and are connected with the connectors. After the secondary-lining inverted arch 6 and the secondary-lining middle layer 8 are finally set, the bearing capacity of the supporting structure and the mechanical property of supporting materials are fully exerted, and the structure is stable.
The middle partition comprises a middle partition protective substrate 1 and a steel bar assembly; the steel bar assembly comprises a plurality of rows of vertical main bars 2 which are longitudinally and symmetrically distributed, the vertical main bars 2 penetrate through the middle partition wall, and two ends of each vertical main bar 2 are respectively fixed inside the arch crown and the inverted arch; the steel bar assembly further comprises a plurality of layers of transverse main bars 3 and tie bars 4, wherein the range of the interlayer spacing between the transverse main bars 3 is 150-200mm, and the transverse main bars 3 are perpendicular to the vertical main bars 2; the lacing wires 4 are arranged at the intersection points of the transverse main ribs 3 and the vertical main ribs 2 in a quincunx manner.
In this embodiment, the specification of vertical main muscle 2 is phi 8@150mm, vertical main muscle 2's diameter is 8mm promptly, interval between the adjacent vertical main muscle 2 is 150mm, horizontal main muscle 3 adopts phi 14@200mm, the diameter of horizontal main muscle 3 is 8mm promptly, interval between the adjacent horizontal main muscle 3 is 200mm, lacing wire 4 adopts phi 8@400mm x 300mm quincunx to lay, well next door protection basement 1 forms for C35 concrete placement, vertical main muscle 2, vertically and horizontally staggered is the rectangle setting in well next door protection basement 1 of well next door between horizontal main muscle 3 and the lacing wire 4, lacing wire 4 adopts quincunx to lay simultaneously horizontal main muscle 3 with vertical main muscle 2's cross point department makes horizontal main muscle 3 with connect between the vertical main muscle 2 more firmly, has further improved well next door's fastness.
And a plurality of stirrups 13 are bound on the transverse main reinforcements 3 on the two layers of the top of the middle partition wall, and the stirrups 13 are bound along the longitudinal direction of the transverse main reinforcements 3. The stirrup 13 can fix the position of the transverse main reinforcement 3, and the shear strength of the oblique section of the middle partition wall is met.
Preferably, be equipped with a plurality of movement joints on the well next door protection basement 1, the interval between the movement joint is 30 meters, the width of movement joint is 2 centimetres. Prevent that the well next door from producing the deformation under the effect of external factor, lead to the fracture even destroy, for example, can produce the breathing deformation because of the next door in the change of factors such as temperature and humidity, perhaps well next door whole vibrations are uncoordinated to produce and destroy, perhaps well next door load distribution is inhomogeneous, appears inhomogeneous settlement and makes wall body or other structural part fracture, in fact, can combine these three kinds of circumstances, reserve certain movement joint, play and prevent the uneven settlement of building, or shockproof effect.
Preferably, the anchoring length of the steel bar assembly in the earthquake resistance is 1.6Lae. The anchoring length represents the length required by the stress bearing steel bar to reach the designed bearing stress by means of the bonding effect of the surface of the stress bearing steel bar and the concrete or the extrusion effect of the end structure, so that the firmness of the member is ensured, and the mechanical engaging force of the stress bearing steel bar and the concrete is enhanced.
The above description is only for the embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which all fall within the scope of the present invention.
Claims (10)
1. The utility model provides a well next door supporting construction which characterized in that:
the top end and the bottom end of the middle partition wall are respectively connected with the arch crown and the inverted arch;
the middle partition comprises a middle partition protective base and a steel bar assembly;
the steel bar assembly comprises a plurality of rows of vertical main bars which are longitudinally and symmetrically distributed, and the vertical main bars penetrate through the middle partition wall; the arch crown is internally provided with arch crown embedded steel bars, inverted arch embedded steel bars are arranged inside the inverted arches, and two ends of each vertical main bar are fixedly connected with the arch crown embedded steel bars and the inverted arch embedded steel bars through connectors respectively.
2. The partition wall supporting structure of claim 1, wherein: the inverted arch comprises an inverted arch filling layer and two lining inverted arch layers from inside to outside, the arch crown sequentially comprises two lining inner side protective layers, two lining middle layers and two lining outer side protective layers from inside to outside, and the two lining inverted arches and the two lining middle layers are connected into a whole.
3. The partition wall supporting structure of claim 2, wherein: the inverted arch embedded steel bars and the arch crown embedded steel bars are respectively distributed in the two lining inverted arches and the two lining middle layers.
4. The partition wall supporting structure of claim 3, wherein: the inverted arch embedded steel bars are L-shaped, and the inverted arch embedded steel bars are oppositely and symmetrically arranged inside the two lining inverted arches.
5. A middle partition wall supporting structure as claimed in claim 3, wherein: the vault embedded steel bars are U-shaped, the openings of the vault embedded steel bars face the inner side protection layers of the two linings, and the two ends of the vault embedded steel bars are embedded into the inner side protection layers of the two linings and are connected with the connectors.
6. The partition wall supporting structure of claim 1, wherein: the steel bar assembly further comprises a plurality of layers of transverse main bars and tie bars, and the transverse main bars are perpendicular to the vertical main bars; the lacing wires are arranged at the intersection points of the transverse main ribs and the vertical main ribs in a quincunx manner.
7. The partition wall supporting structure of claim 6, wherein: and a plurality of stirrups are bound on the two layers of the transverse main reinforcements at the top of the middle partition wall along the longitudinal direction of the transverse main reinforcements.
8. The partition wall supporting structure of claim 6, wherein:
the interlayer spacing between the transverse main ribs is 150-200mm.
9. The partition wall supporting structure of claim 1, wherein: and a plurality of deformation joints are arranged on the protecting substrate of the middle partition wall.
10. The partition wall supporting structure of claim 9, wherein: the distance between the deformation joints is 30 meters, and the width of each deformation joint is 2 centimeters.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022206469342 | 2022-03-22 | ||
| CN202220646934 | 2022-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217582161U true CN217582161U (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220767002.3U Active CN217582161U (en) | 2022-03-22 | 2022-04-01 | Middle bulkhead supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217582161U (en) |
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2022
- 2022-04-01 CN CN202220767002.3U patent/CN217582161U/en active Active
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Inventor after: Yin Xuexin Inventor after: Zhou Wei Inventor after: Chen Jun Inventor after: Ma Shijing Inventor after: Lan Ping Inventor after: Guo Guixi Inventor after: Xie Qing Inventor after: Li Junfeng Inventor after: Wu Weiqiang Inventor after: Liu Jinhui Inventor after: Ma Lipeng Inventor after: Gao Xiaogang Inventor after: Weng Nianping Inventor after: Wang Yuefeng Inventor after: Zhao Jinzheng Inventor after: Xu Guangyao Inventor after: Wu Dongliang Inventor after: Wang Zhenhua Inventor after: Cui Kai Inventor after: Lv Shuai Inventor after: Wang Zhongzhao Inventor after: Meng Tao Inventor before: Gao Xiaogang Inventor before: Zhou Wei Inventor before: Chen Jun Inventor before: Ma Shijing Inventor before: Lan Ping Inventor before: Guo Guixi Inventor before: Xie Qing Inventor before: Li Junfeng Inventor before: Wu Weiqiang Inventor before: Liu Jinhui Inventor before: Ma Lipeng Inventor before: Xu Guangyao Inventor before: Weng Nianping Inventor before: Wang Yuefeng Inventor before: Zhao Jinzheng Inventor before: Wu Dongliang Inventor before: Wang Zhenhua Inventor before: Cui Kai Inventor before: Yin Xuexin Inventor before: Lv Shuai Inventor before: Wang Zhongzhao Inventor before: Meng Tao |