CN216811722U - Two lining construction equipment in big section underground fan room in highway extra-long tunnel - Google Patents
Two lining construction equipment in big section underground fan room in highway extra-long tunnel Download PDFInfo
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- CN216811722U CN216811722U CN202220591509.8U CN202220591509U CN216811722U CN 216811722 U CN216811722 U CN 216811722U CN 202220591509 U CN202220591509 U CN 202220591509U CN 216811722 U CN216811722 U CN 216811722U
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Abstract
The utility model provides a two-lining construction device for a large-section underground fan room of a super-long tunnel of a highway, belonging to the technical field of tunnel engineering and comprising a two-lining rack, a reinforcing steel bar mounting rack and a walking track laid along the longitudinal direction of the underground fan room; the two lining racks comprise a main portal I, a longitudinal bottom beam I, a longitudinal connecting beam I, a top workbench I and a lateral workbench I; the clear height of the main portal I is matched with the height of the two-lining straight wall, a plurality of main portals I are arranged along the longitudinal direction of the underground fan room, and the upright posts I are connected with the longitudinal connecting beam I through the longitudinal bottom beam I; the steel bar mounting frame comprises a main portal frame II, a longitudinal bottom beam II, a longitudinal connecting beam II, a top workbench II and a lateral workbench II. In the device, the materials used for processing the two lining racks and the reinforcing steel bar mounting rack are all field conventional materials, so that the materials are convenient to obtain, the processing technology is simple, the cost is low, and the construction cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering, and particularly relates to a second lining construction device for a large-section underground fan room of a super-long tunnel of a highway.
Background
With the continuous development of tunnel construction technology, the number of the extra-long tunnels is continuously increased, and inclined shafts and underground fan rooms are arranged in most of the extra-long tunnels of the roads so as to meet the ventilation requirement in the operation period. Because of the underground fan room need set up the main equipment such as ventilation blower and row hang, fan room design height is high, the span is big, has set up a plurality of crossings and each contact wind channel looks UNICOM, and has had the asymmetry to set up the phenomenon in the crossing, will avoid appearing the ring direction construction joint and arrange the unfavorable condition in crossing hunch portion, has seriously increased the construction degree of difficulty. Simultaneously, because of fan room length is shorter, utilize two linings of traditional whole hydraulic trolley construction, the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a two-lining construction device for a large-section underground fan room of a super-long tunnel of a highway, which can reduce the construction cost.
The utility model provides a two-lining construction device for a large-section underground fan room of a super-long highway tunnel, which comprises two lining racks, a reinforcing steel bar mounting rack and a walking track laid along the longitudinal direction of the underground fan room;
the two lining racks comprise a main portal I, a longitudinal bottom beam I, a longitudinal connecting beam I, a top workbench I and a lateral workbench I; the net height of the main portal I is matched with the height of the two lining straight walls, and the main portal I comprises upright posts I, an upper cross beam I and a middle cross beam, wherein the tops of the two upright posts I are connected through the upper cross beam I, and the middle parts of the two upright posts I are connected through the middle cross beam; the underground fan room structure comprises a plurality of main door frames I, vertical columns I, longitudinal connecting beams I, a plurality of supporting columns I and a plurality of supporting columns I, wherein the main door frames I are arranged along the longitudinal direction of the underground fan room; a travelling wheel I matched with the travelling track and a travelling wheel motor I for driving the travelling wheel I to travel are arranged on the longitudinal bottom beam I; the top workbench I comprises a top frame body I arranged on the upper cross beam I and plates longitudinally paved on the top frame bodies I; the lateral workbench I comprises a lateral cross beam I arranged on the outer side of the upright post I and plates longitudinally paved on the lateral cross beams I;
the steel bar mounting frame comprises a main portal frame II, a longitudinal bottom beam II, a longitudinal connecting beam II, a top workbench II and a lateral workbench II; the main portal frame II comprises an upright post II and an upper cross beam II; the tops of the two stand columns II are connected through an upper cross beam II; the multiple main door frames II are arranged along the longitudinal direction of the underground fan room, the stand columns II are connected with the longitudinal connecting beams II through the longitudinal bottom beams II, the longitudinal bottom beams II are located at the bottom ends of the stand columns II, and the longitudinal connecting beams II are located above the longitudinal bottom beams II; a travelling wheel II matched with the travelling track and a travelling wheel motor II for driving the travelling wheel II to travel are arranged on the longitudinal bottom beam II; the top workbench II comprises a top frame body II arranged on the upper cross beam II and plates longitudinally paved on the multi-roof frame body II; and the lateral workbench II comprises a lateral cross beam II arranged on the outer side of the stand column II and plates longitudinally paved on the multiple lateral cross beams II.
Furthermore, the two lining racks also comprise a vertical support, an inclined support I and a transverse support; the middle part of entablature I and well crossbeam is passed through vertical braces and is connected, all is connected through bracing I between stand I and the entablature I and between stand I and the well crossbeam, is connected through horizontal braces between stand I and the bracing I.
Furthermore, the two lining racks further comprise longitudinal inclined supports I, and the longitudinal inclined supports I are arranged between the upright posts I of the two adjacent main racks I.
Further, the lateral workbench I is provided with a working ladder.
Further, the steel bar mounting frame further comprises an inclined strut II, and the stand II is connected with the upper cross beam II through the inclined strut II.
Furthermore, the steel bar mounting rack further comprises a longitudinal inclined support II, and the longitudinal inclined support II is arranged between the upright posts II of the two adjacent main door frames II.
Furthermore, the side cross beam II is connected with the upright post II through an inclined strut III.
The utility model has the following beneficial effects:
1. the materials used for processing the second lining rack and the reinforcing steel bar mounting rack are all on-site conventional materials, so that the materials are convenient to obtain, the processing technology is simple, the cost is low, and the construction cost is reduced;
2. the second lining rack is a simple structure, is stable in stress and is simple and convenient to assemble, disassemble and construct;
in conclusion, the utility model enriches the tunnel construction technology and has extremely wide popularization value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a process flow diagram of a construction device for a second liner of a large-section underground fan room of a super-long tunnel of a highway;
FIG. 2 is a front view of a two-lined table (before the form is installed);
FIG. 3 is a front view of a two-piece pallet (after template installation);
FIG. 4 is a side view of the two-lined stand (before the template is installed);
FIG. 5 is a front view of the rebar installation rack;
FIG. 6 is a schematic elevation view of an underground fan house intersection;
FIG. 7 is a schematic plan view of a two-lining split plate and a split height split pouring sequence;
fig. 8 is a sequence diagram of two-liner casting per slab.
Icon: the device comprises a longitudinal bottom beam I101, a longitudinal connecting beam I102, a longitudinal inclined strut I103, a vertical column I104, an upper beam I105, a middle beam 106, a vertical support 107, an inclined strut I108, a transverse support 109, a travelling wheel I110, a travelling wheel motor I111, a top frame body I112, a side beam I113 and a working ladder 114;
the vertical column II 201, the upper cross beam II 202, the inclined strut II 203, the longitudinal bottom beam II 204, the travelling wheel II 205, the top frame body II 206, the side cross beam II 207 and the inclined strut III 208;
a travel rail 300;
a second lining rack template 401, a second lining rack template framework 402, a lead screw 403 and a working window preset position 404;
the construction method comprises the following steps of (1) casting a second liner inner contour 501, an intersection 502, a first casting 503, a first casting 504, a bracket embedded part 505, a straight wall top (a twice casting boundary) 506, an underground fan room center line 507, an inclined shaft side 508, a main hole side 509 and a second liner rack construction end 510;
a straight wall template skeleton 600.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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.
The use method of the large-section underground fan room two-lining construction device of the road extra-long tunnel is described in detail by taking the road extra-long tunnel as an example. The size of the inner profile 501 of the second liner of the underground fan house is as follows: 126m (length) × 10m (width) × 13m (height), and the thickness of the second liner is 60cm, wherein, the height of the straight wall is 9.25 m. The straight walls on two sides are provided with 12 intersections 502, and the two ends are respectively provided with 1 intersection 502. And (3) arranging corbel embedded parts 505 which are hung in rows at the height of 8m of the vertical walls on the two sides at intervals of 4m, wherein the total number of the corbels is 33, and the corbels are all located at the same elevation.
The method comprises the following steps.
1. And (3) retesting the primary branch section: and the primary support section of the underground fan room is retested before the waterproof board is hung, so that the thickness of the secondary lining can meet the design requirement.
2. And (3) waterproof layer construction: before the waterproof layer is laid, the projections such as the steel bar heads on the surface of the primary support are cut and leveled by mortar, and the laying looseness of the waterproof layer meets the design requirement.
Because of the particularity that the underground fan room is high in height and large in span, in order to ensure the overall stability of the two lining steel bars, two steel bar joints are reserved at the top of each side wall straight wall of each plate with two linings, each steel bar joint penetrates through the waterproof layer, one end of each steel bar joint is welded on the chiseled-open primary I-shaped steel frame, the other end of each steel bar joint is welded on the main steel bar of each two lining, and the holes of the steel bars penetrating through the waterproof layer are sealed.
3. Assembling a second lining rack and a steel bar mounting rack: in the underground fan room, a walking track is laid along the longitudinal direction of the underground fan room, and a second lining rack and a reinforcing steel bar mounting rack are assembled.
The two lining rack frames are 7.5m in length and comprise a main portal frame I, a longitudinal bottom beam I101, a longitudinal connecting beam I102, a longitudinal inclined strut I103, a top workbench I and a lateral workbench I.
The clear height of the main portal I is matched with the height of a second-lining straight wall, and the main portal I comprises upright columns I104, an upper cross beam I105, a middle cross beam 106, vertical supports 107, inclined supports I108 and transverse supports 109, all adopt H20 steel, and are connected with one another through high-strength bolts. The tops of two stand I104 are connected through I105 of entablature, and the middle part of two stand I104 is connected through middle cross beam 106, and the middle part of entablature I105 and middle cross beam 106 is connected through vertical braces 107, all is connected through I108 of bracing between I104 of stand and the I105 of entablature and between I104 of stand and the middle cross beam 106, is connected through horizontal brace 109 between I104 of stand and the I104 of bracing.
6 main portal I are arranged along the longitudinal direction of the underground fan room, the distance between adjacent main portals I is 1.5m, and the span width is 7.2 m. The upright I104 is connected with the longitudinal connecting beam I102 through the longitudinal bottom beam I101. The longitudinal bottom beam I101 is formed by buckling double I-shaped steel I25, is 8.0m long and is connected with the bottom end of the upright post I104 through a high-strength bolt. The three longitudinal connecting beams I102 are all located above the longitudinal bottom beam I101 and are connected with the upright post I104 through high-strength bolts by adopting I18I-shaped steel. A longitudinal inclined support I103 is arranged between upright posts I104 of two adjacent main door frames I, the longitudinal inclined support I103 is positioned between a longitudinal bottom beam I101 and a longitudinal connecting beam I102 and between two adjacent longitudinal connecting beams I102, and 10# channel steel is adopted. A travelling wheel I110 matched with the travelling rail 300 and a travelling wheel motor I111 for driving the travelling wheel I110 to travel are arranged on the longitudinal bottom beam I101.
The top workbench I comprises a top frame body I112 arranged on the upper cross beam I105 and plates longitudinally paved on the multi-roof frame body I112, the top frame body I112 is of a convex structure formed by splicing H20 section steel, and the plates are 5cm thick wood plates.
Lateral operation platform I is provided with work ladder 114 including setting up at the side crossbeam I113 in the stand I104 outside and vertically laying the panel on a plurality of side crossbeams I113, lateral operation platform I, and work ladder 114 specifically distributes and adjusts according to actual use condition. The side cross beam I113 is made of I22I-shaped steel.
The reinforcing steel bar mounting frame comprises a main portal frame II, a longitudinal bottom beam II 204, a longitudinal connecting beam II, a longitudinal inclined strut II, a top workbench II and a lateral workbench II; the main portal II comprises an upright post II 201, an upper beam II 202 and an inclined strut II 203, wherein the upright post II 201 and the upper beam II 202 are made of I20I-shaped steel, the inclined strut II 203 is made of I14I-shaped steel, and the upright post II 201 and the upper beam II 202 are connected through high-strength bolts. The tops of the two stand columns II 201 are connected through an upper cross beam II 202, and the stand columns II 201 are connected with the upper cross beam II 202 through inclined struts II 203. The multi-frame main portal II is arranged along the longitudinal direction of the underground fan room and is connected with the main portal I in the same way, the upright II 201 is connected with the longitudinal connecting beam II through the longitudinal bottom beam II 204, the longitudinal bottom beam II 204 is positioned at the bottom end of the upright II 201, the longitudinal connecting beam II is positioned above the longitudinal bottom beam II 204, and a longitudinal inclined strut II is arranged between the upright II 201 of two adjacent main portals II; a travelling wheel II 205 matched with the travelling track and a travelling wheel motor II for driving the travelling wheel II 205 to travel are arranged on the longitudinal bottom beam II 204; the top workbench II comprises a top frame body II 206 arranged on the upper cross beam II 202 and plates longitudinally paved on a plurality of top frame bodies II 206, and the top frame body II 206 is of a convex structure formed by 48 steel pipes; the lateral workbench II comprises a lateral cross beam II 207 arranged on the outer side of the upright post II 201 and plates longitudinally paved on the multiple lateral cross beams II 207; and the side cross beam II 207 is connected with the upright post II 201 through an inclined strut III 208.
After the assembly is completed, the two lining racks are moved to the positions of the two linings of the first plate, and the steel bar mounting rack is moved to the end of the two lining racks to form a parallel operation mode.
4. Installing a second lining of steel bars: and carrying out steel bar installation operation according to the designed steel bar model and the designed steel bar interval, wherein each plate is provided with two lining steel bars which are installed and formed at one time according to the whole ring, and the two lining main bars and the reserved steel bar joints are firmly welded at the top of the straight wall. The second lining steel bar of the first plate is installed by using the second lining rack, and other second lining steel bars are installed by using the steel bar installation rack.
5. Installing a bracket embedded part: and measuring the height of the bracket embedded part on the annular main reinforcements on the two sides of the second liner, and firmly welding the bracket embedded part and the second liner steel reinforcements according to the designed interval.
6. Template assembly: and assembling the second lining rack template after the second lining steel bars of the first plate are installed. The two lining rack templates 401 are assembled by steel dies with the length of 1.5m, the framework 402 of the two lining rack templates is made of I18I-shaped steel and is arranged in the same ring with the H20 type steel main portal I, 18 lead screws 403 are arranged on each main portal I in a whole circle, and the reinforcing and demolding of the two lining rack templates 401 are completed through the lead screws 403. The two lining rack templates 401 are provided with grouting holes and working windows, the top grouting holes are arranged at two positions, the working windows are arranged at positions 4.5m and 9m away from the bottom, and each side and layer of the two lining racks are provided with 3 working windows.
7. Pouring secondary lining concrete: pouring the second lining of each plate twice according to the height, wherein the first pouring is carried out to the top of the straight wall, and the second pouring is carried out to complete the arch concrete pouring. The problem of one stress in the process of pouring the large-section secondary lining concrete is resolved into two times, and the requirements of construction on a trolley are reduced. In order to avoid the unfavorable condition that two lining rings appear in the crossing hunch portion to the construction joint, combine crossing 502 width and the distribution condition in underground fan room both sides, when two lining rack vertical coverage length can not cover the crossing 502 of underground fan room both sides completely, be located the vertical wall position outside the two lining rack vertical coverage length range at crossing 502, increase I16I-steel as vertical wall template skeleton 600, install 1.5m steel form as the vertical wall template equally, I16I-steel passes through the steel pipe bracing and strengthens the bracing, the vertical wall template set up height and length principle and do: when the construction of the two linings within the range of the intersection is completed at one time, the reserved positions of the annular construction joints are taken into consideration, and the phenomenon that the two lining rings form the construction joints to the arch part of the intersection is avoided. The vertical wall template is also provided with grouting holes and a working window. When the high-height concrete of the straight wall is poured to the top, a longitudinal steel plate water stop is reserved, and before the concrete of the arch part is poured, the laitance is removed from the concrete at the top of the straight wall until the aggregate is exposed.
As shown in fig. 7 and 8, 2-28 is a moving direction of the two-lining rack, when the two-lining rack is located at the position 2, the two-lining rack template 401 is installed, because the intersections 502 at the two sides of the position 2 are located outside the longitudinal coverage length of the two-lining rack, the straight wall template framework 600 and the straight wall template are added at the straight wall position where the intersection 502 is located outside the longitudinal coverage length range of the two-lining rack, the position 1 is poured first, the position 2 is poured, the straight wall template framework 600 and the straight wall template at the position 1 are removed, the two-lining rack is moved to the position 3, the position 3 is poured, the two-lining rack is moved to the position 5, the position 4 is poured first, the position 5 is poured later, and so on.
8. Concrete curing: and (4) demoulding the secondary lining concrete after the secondary lining concrete reaches 85% of the design strength, and continuously curing for 14 days after demoulding.
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 utility model 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 two-lining construction device for a large-section underground fan room of a super-long highway tunnel is characterized by comprising two lining racks, a reinforcing steel bar mounting rack and a walking track laid along the longitudinal direction of the underground fan room;
the two lining racks comprise a main portal I, a longitudinal bottom beam I, a longitudinal connecting beam I, a top workbench I and a lateral workbench I;
the net height of the main portal I is matched with the height of the two lining straight walls, and the main portal I comprises upright posts I, an upper cross beam I and a middle cross beam, wherein the tops of the two upright posts I are connected through the upper cross beam I, and the middle parts of the two upright posts I are connected through the middle cross beam;
the underground fan room structure comprises a plurality of main door frames I, vertical columns I, longitudinal connecting beams I, a plurality of supporting columns I and a plurality of supporting columns I, wherein the main door frames I are arranged along the longitudinal direction of the underground fan room;
a travelling wheel I matched with the travelling track and a travelling wheel motor I for driving the travelling wheel I to travel are arranged on the longitudinal bottom beam I;
the top workbench I comprises a top frame body I arranged on the upper cross beam I and plates longitudinally paved on the top frame bodies I;
the lateral workbench I comprises a lateral cross beam I arranged on the outer side of the upright post I and plates longitudinally paved on the lateral cross beams I;
the steel bar mounting frame comprises a main portal frame II, a longitudinal bottom beam II, a longitudinal connecting beam II, a top workbench II and a lateral workbench II;
the main portal frame II comprises a stand column II and an upper cross beam II;
the tops of the two stand columns II are connected through an upper cross beam II;
the multiple main door frames II are arranged along the longitudinal direction of the underground fan room, the stand columns II are connected with the longitudinal connecting beams II through the longitudinal bottom beams II, the longitudinal bottom beams II are located at the bottom ends of the stand columns II, and the longitudinal connecting beams II are located above the longitudinal bottom beams II;
a travelling wheel II matched with the travelling track and a travelling wheel motor II for driving the travelling wheel II to travel are arranged on the longitudinal bottom beam II;
the top workbench II comprises a top frame body II arranged on the upper cross beam II and plates longitudinally paved on the multi-roof frame body II;
and the lateral workbench II comprises a lateral cross beam II arranged on the outer side of the stand column II and plates longitudinally paved on the multiple lateral cross beams II.
2. The construction device for the second liner of the large-section underground fan room of the extra-long road tunnel according to claim 1, wherein the second liner rack further comprises a vertical support, an inclined strut I and a transverse support;
the middle part of entablature I and well crossbeam is passed through vertical braces and is connected, all is connected through bracing I between stand I and the entablature I and between stand I and the well crossbeam, is connected through horizontal braces between stand I and the bracing I.
3. The construction device for the two linings of the large-section underground fan room of the extra-long tunnel of the highway according to claim 2, wherein the two lining racks further comprise a longitudinal diagonal brace I, and the longitudinal diagonal brace I is arranged between the upright posts I of the two adjacent main racks I.
4. The construction device for the secondary lining of the large-section underground fan room of the extra-long road tunnel according to claim 3, wherein a working ladder is arranged on the lateral workbench I.
5. The construction device for the large-section underground fan room secondary lining of the extra-long road tunnel according to claim 1, wherein the steel bar mounting frame further comprises an inclined strut II, and the stand column II is connected with the upper cross beam II through the inclined strut II.
6. The construction device for the two linings of the large-section underground fan room of the extra-long tunnel of the road as claimed in claim 5, wherein the reinforcing steel bar mounting rack further comprises a longitudinal inclined strut II, and the longitudinal inclined strut II is arranged between the upright posts II of the two adjacent main door frames II.
7. The construction device for the second liner of the large-section underground fan room of the extra-long road tunnel according to claim 6, wherein the side cross beams II are connected with the vertical columns II through inclined struts III.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591509.8U CN216811722U (en) | 2022-03-18 | 2022-03-18 | Two lining construction equipment in big section underground fan room in highway extra-long tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591509.8U CN216811722U (en) | 2022-03-18 | 2022-03-18 | Two lining construction equipment in big section underground fan room in highway extra-long tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216811722U true CN216811722U (en) | 2022-06-24 |
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ID=82044690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220591509.8U Active CN216811722U (en) | 2022-03-18 | 2022-03-18 | Two lining construction equipment in big section underground fan room in highway extra-long tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216811722U (en) |
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2022
- 2022-03-18 CN CN202220591509.8U patent/CN216811722U/en active Active
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