CN220955618U - Sliding rail mold covering device for tunnel straight wall section primary support structure spray anchor - Google Patents
Sliding rail mold covering device for tunnel straight wall section primary support structure spray anchor Download PDFInfo
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- CN220955618U CN220955618U CN202323016073.3U CN202323016073U CN220955618U CN 220955618 U CN220955618 U CN 220955618U CN 202323016073 U CN202323016073 U CN 202323016073U CN 220955618 U CN220955618 U CN 220955618U
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- wall section
- anchor
- template
- straight wall
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- 239000007921 spray Substances 0.000 title claims abstract description 34
- 238000005507 spraying Methods 0.000 claims abstract description 35
- 210000004258 portal system Anatomy 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 3
- 238000007607 die coating method Methods 0.000 claims 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 17
- 239000011378 shotcrete Substances 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The sliding rail mold covering device for the primary support structure spray anchor of the tunnel straight wall section comprises a portal system and a template system; the portal system comprises a portal, wherein the portal is vertically fixed on one side of the arch frame, and a lifting device is arranged at the top end of the portal; the template system comprises a covering template, the upper end of the covering template is connected with the lifting device, and the covering template is arranged on the portal in a sliding manner through rollers left and right; in the anchor spraying process, the covering template is gradually lifted upwards and forms a closed cavity structure with the sprayed part. The sliding rail mold covering device for the primary support structure spray anchor of the tunnel straight wall section, provided by the utility model, completely avoids rebound loss of spray anchor materials and reduces cost.
Description
Technical Field
The utility model relates to a sliding rail mold covering device, in particular to a sliding rail mold covering device for a primary support structure spray anchor of a tunnel straight wall section, which is applied to the field of hydraulic and hydroelectric engineering, highway engineering and railway engineering tunnel straight wall section primary support structure spray anchor construction.
Background
In recent years, water-induced power, highway and railway engineering develop rapidly, and the engineering relates to primary support structure construction in different forms in tunnel engineering according to the geological change difference of surrounding rocks. The primary supporting structure is mainly vertical arch frame net hanging and shotcrete supporting or direct net hanging and shotcrete supporting in tunnel construction, with the development of the shotcrete technology, the shotcrete supporting rate is higher and higher, many tunnels adopt to cancel secondary lining structures, and the primary shotcrete supporting structure is designed to be used as a permanent supporting structure. The anchor spraying material is usually C25 sprayed concrete, and the anchor spraying process is a conventional mechanical wet spraying process. The problem of springback of the anchor during the anchor spraying process is always focused, and the springback (loss) rate of the conventional anchor spraying operation is 15%. The single-cycle anchor spraying operation surface is large, the anchor spraying time is long, the anchor spraying equipment is operated by people, the foundation rock surface is smooth and uneven after blasting excavation in the construction, the angle of a spray nozzle, the air pressure of the anchor spraying and the like are not regulated and controlled in time, a large anchor spraying rebound phenomenon is generated in the anchor spraying construction, the anchor spraying rebound quantity exceeds the standard seriously, the anchor spraying rebound loss rate reaches about 40%, and the anchor spraying cost is increased sharply; especially under the condition that surrounding rock geological conditions are suddenly changed, when the surrounding rock geology is granite, the rebound of the spray anchor is further increased due to the high rebound value of the rock, the loss of the rebound rate of the spray anchor is about 70%, the cost of the spray anchor is nearly doubled, and serious loss is brought to engineering. Meanwhile, the flatness of the surface of the spray anchor is manually controlled, the surface of the spray anchor is uneven, the flatness is poor, most of the spray anchor is in a rib-shaped form, when the spray anchor is used as a permanent exposed surface, the appearance quality is poor, secondary spray repair construction is needed in the later period, the engineering quantity is increased again, and the construction progress is influenced.
Disclosure of Invention
The utility model aims to solve the technical problems of poor flatness, uneven surface, serious exceeding of rebound rate, large rebound loss, low anchor spraying efficiency, long process occupation time, high construction cost and the like of a primary support anchor spraying surface of a tunnel.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the sliding rail mold covering device for the primary support structure spray anchor of the tunnel straight wall section comprises a portal system and a template system;
The portal system comprises a portal, wherein the portal is vertically fixed on one side of the arch frame, and a lifting device is arranged at the top end of the portal;
the template system comprises a covering template, the upper end of the covering template is connected with the lifting device, and the covering template is arranged on the portal in a sliding manner through rollers left and right; in the anchor spraying process, the covering template is gradually lifted upwards and forms a closed cavity structure with the sprayed part.
The portal comprises left and right stand columns, the top ends of the two stand columns are connected through a cross beam, the height of the portal covers the height of a straight wall section of a tunnel, and the width is adapted to the arch spacing of the tunnel design and the one-time anchor spraying support footage.
The portal is manufactured by welding channel steel.
And the bottom end of the upright post is welded with a dowel bar, and the extension part of the dowel bar is inserted into the bedrock surface of the tunnel bottom plate.
And positioning ribs are welded on the top end of the cross beam left and right, and the other ends of the positioning ribs are welded and fixed with the arch centering.
The hoisting device is a winch, the winch is welded in the middle of the beam, and a lifting rope of the winch is buckled with a lifting ring at the upper end of the covering template through a hook.
The lug plates are welded on the left, right, upper and lower sides of the covering template, one end of the screw rod penetrates through the lug plates and is locked, and the other end of the screw rod is welded with the support of the roller.
The utility model discloses a sliding rail mold covering device for a primary support structure spray anchor of a tunnel straight wall section, which has the following technical effects:
1) The closed cavity structure is formed by the covering template and the sprayed part, so that the spray anchor material is guaranteed to be filled tightly in the cavity, rebound loss of the spray anchor material can be completely avoided, and further the cost is reduced.
2) And the covering template is lifted and slipped upwards by virtue of the sliding rail and the manual winch, and the anchor spraying and the covering template slipping are synchronously carried out until the anchor spraying work of the whole straight wall section is completed, so that the anchor spraying efficiency is high.
3) The device is installed and positioned once until the whole straight wall section is moved to the next anchor spraying working face for recycling after the anchor spraying construction is completed, the device is low in manufacturing cost and simple in installation and operation process, and meanwhile the anchor spraying face can be guaranteed to be smooth, and the appearance quality is good.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
Fig. 1 is a schematic view (front elevation) of the operation of the present utility model.
Fig. 2 is a schematic diagram (side elevation) of the operation of the present utility model.
Fig. 3 is a front view of the present utility model.
Fig. 4 is a left side view of the present utility model.
In the figure: the steel wire rope comprises a column 1, a cross beam 2, a positioning rib 3, a winch 4, a hook 5, a hanging ring 6, a covering template 7, a screw rod 8, rollers 9, a butterfly nut 10, a dowel bar 11, an arch 12, an ear plate 13, a strip-shaped screw hole 14 and a hexagon nut 15.
Detailed Description
As shown in figures 1-4, the slide rail mold covering device for the primary support structure spray anchor of the tunnel straight wall section comprises a portal system and a template system. The portal system is manufactured according to the interval of arches 12 (made of steel) designed by the tunnel and the one-time shotcrete support footage shaping; the portal system is used for guiding and lifting the template system. The template system and the sprayed part form a closed cavity structure in the lifting process, so that a closed type anchor spraying and supporting process in the cavity is realized.
As shown in fig. 3, the portal system is manufactured by adopting 8# channel steel welding, the portal system covers the height of the vertical wall section of the tunnel, and the width is determined according to the distance between arches 12 designed by the tunnel and the one-time anchor spraying support footage.
As shown in fig. 1-2, the gantry system consists of uprights 1, a cross beam 2.
Wherein, stand 1 bottom erects and supports in tunnel bottom plate bedrock face, stand 1 footing department sets up joint bar 11 and stand 1 welded fastening, and the clear distance between stand 1 and the bow member 12 is not more than 2cm. The dowel bar 11 is a phi 20 screw-thread steel bar, the length of the dowel bar 11 is 30cm, the dowel bar 11 is planted in the hole after manual drilling, the drilling depth is 20cm, and the exposed length of the dowel bar 11 is 10cm.
The cross beam 2 is positioned at the upper end and connects the two uprights 1. Positioning ribs 3 (reinforcing steel bars) are arranged at two ends of the cross beam 2, one end of each positioning rib 3 is welded and fixed with the cross beam 2, and the other end is welded and fixed with the arch 12. The whole portal system is fixed in place through the positioning ribs 3 at the two ends of the stand column 1 and the two ends of the cross beam 2.
The beam 2 is provided with a winch 4, the winch 4 can be purchased in the market and is provided with a braking device, the winch 4 is welded and fixed in the middle of the beam 2, and a lifting rope of the winch 4 is used for lifting the template system.
The template system consists of a covering template 7, a hanging ring 6 and a roller 9.
Wherein, rings 6 both ends are fixed on covering template 7, and rings 6 centre is tightly detained with couple 5, and the lifting rope of capstan winch 4 is connected with couple 5. The cover template 7 is gradually lifted upwards through the rotation of the handle of the winch 4, the sprayed surface is formed into a closed cavity structure, and the anchor spraying process and the lifting of the cover template 7 are synchronously performed.
The cover template 7 is a steel panel, the height of the panel is 50cm, the thickness is 3mm, the upper end of the cover template 7 is provided with a hanging ring 6, the left side and the right side are symmetrically welded with the lug plates 13, and strip screw holes 14 are drilled on the lug plates 13.
The roller 9 is a natural rubber directional wheel, the diameter of the roller 9 is not less than 12cm, the roller 9 is arranged in a groove of the vertical rod 1, a bracket of the roller 9 is horizontally welded and fixed with one end of the screw rod 8, and a screw rod section at the other end of the screw rod 8 passes through a strip-shaped screw hole 14 arranged on the lug plate 13. The rollers 9 are installed and positioned after being fastened by the butterfly nuts 10 on the outer side of the screw rod 8 and the hexagon nuts 15 on the inner side of the screw rod 8.
Working principle and process:
Step 1), a portal system and a template system of the device are manufactured in a reinforcing steel bar processing field in advance according to the distance between arches 12 designed in a tunnel and the one-time anchor spraying support footage. After the portal system is formed, the winch 4 is welded in the middle of the beam 2 of the portal system, four screws 8 on the left side and the right side of the template system penetrate through strip screw holes 14 preset by four lug plates 13 on the two sides of the template 7, after being screwed by hexagonal nuts 15 and butterfly nuts 10 on the inner side and the outer side of the screws 8, the four screws 8 are fixed in holes of the four lug plates, and four rollers 9 are placed in channel steel of the upright post 1 of the portal system, and the specific positions correspond to the four screws 8. The roller bracket is welded and fixed with the other end of the screw rod 8 horizontally, and the portal system and the template system are connected into an integral structure at the moment, so that the device is assembled.
Step 2), the device is transported to a primary support structure spray anchor construction position in a tunnel, the device is erected on the corresponding spray anchor construction position manually, after the specific position of the device is determined, the foundation rock face of the foundation of two vertical columns of the portal system is driven into the dowel bars 11, after the dowel bars 11 are installed, the exposed parts of the dowel bars 11 are welded and fixed with the vertical columns 1, two positioning ribs 3 are welded on a beam 2 above the portal system, the setting points of the positioning ribs 3 correspond to the position of an on-site arch 12, the other ends of the positioning ribs 3 are welded and fixed with the arch 12, and the device is fixedly installed.
Step 3), the hook 5 at the bottom of the winch 4 on the cross beam 2 is tightly buckled with the hanging ring 6 above the covering template 7, and then the anchor spraying equipment can be started to perform anchor spraying construction on the sprayed surface. The anchor spraying construction is gradually advanced from bottom to top in a closed cavity structure formed by the device.
Step 4), observing the structure spray anchor height at any time in the spray anchor construction, manually rotating a winch 4 on the beam 2 when the spray anchor height is basically close to the top Gao Chengmian of the covering template 7, driving the covering template 7 to slowly lift upwards by 40cm through a hook 5 and a hanging ring 6, continuing the spray anchor construction, and the like until the spray anchor construction of the primary support structure of the whole straight wall section is completed.
Step 5), after the primary supporting structure of the whole straight wall section of the tunnel is subjected to anchor spraying construction, the positioning steel bars on the cross beam of the portal system and the dowel bars of the stand column feet are cut off, and the device can be transferred to the next working face for recycling.
Claims (7)
1. Tunnel straight wall section primary support structure spouts anchor and covers mould device with slide rail, its characterized in that: the system comprises a portal system and a template system;
The portal system comprises a portal, wherein the portal is vertically fixed on one side of an arch (12) and the top end of the portal is provided with a lifting device;
The template system comprises a covering template (7), the upper end of the covering template (7) is connected with the lifting device, and the covering template (7) is arranged on the portal in a sliding manner through rollers (9); in the anchor spraying process, the covering template (7) is gradually lifted upwards and forms a closed cavity structure with the sprayed part.
2. The slide rail die coating device for the primary support structure spray anchor of the tunnel straight wall section according to claim 1, wherein the slide rail die coating device is characterized in that: the portal comprises left and right upright posts (1), the top ends of the two upright posts (1) are connected through a cross beam (2), the height of the portal covers the height of a straight wall section of a tunnel, and the width is adapted to the space between arches (12) of the tunnel design and the one-time anchor spraying support footage.
3. The slide rail die coating device for the primary support structure spray anchor of the tunnel straight wall section according to claim 2, wherein: the portal is manufactured by welding channel steel.
4. The slide rail die coating device for the primary support structure spray anchor of the tunnel straight wall section according to claim 2, wherein: and the bottom end of the upright post (1) is welded with a dowel bar (11), and the extending part of the dowel bar (11) is inserted into the bedrock surface of the tunnel bottom plate.
5. The slide rail die coating device for the primary support structure spray anchor of the tunnel straight wall section according to claim 2, wherein: the left and right sides of the top end of the cross beam (2) are welded with positioning ribs (3), and the other ends of the positioning ribs (3) are welded and fixed with the arch centering (12).
6. The slide rail die coating device for the primary support structure spray anchor of the tunnel straight wall section according to claim 2, wherein: the lifting device is a winch (4), the winch (4) is welded at the middle of the cross beam (2), and a lifting rope of the winch (4) is buckled with a lifting ring (6) at the upper end of the covering template (7) through a hook (5).
7. The slide rail die coating device for the primary support structure spray anchor of the tunnel straight wall section according to claim 2, wherein: ear plates (13) are welded on the left, right, upper and lower sides of the covering template (7), one end of a screw rod (8) penetrates through the ear plates (13) and is locked, and the other end of the screw rod (8) is welded with a support of the roller (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323016073.3U CN220955618U (en) | 2023-11-08 | 2023-11-08 | Sliding rail mold covering device for tunnel straight wall section primary support structure spray anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323016073.3U CN220955618U (en) | 2023-11-08 | 2023-11-08 | Sliding rail mold covering device for tunnel straight wall section primary support structure spray anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220955618U true CN220955618U (en) | 2024-05-14 |
Family
ID=91014426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323016073.3U Active CN220955618U (en) | 2023-11-08 | 2023-11-08 | Sliding rail mold covering device for tunnel straight wall section primary support structure spray anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220955618U (en) |
-
2023
- 2023-11-08 CN CN202323016073.3U patent/CN220955618U/en active Active
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