CN210068171U - Tunnel mould spouts concrete support construction equipment - Google Patents
Tunnel mould spouts concrete support construction equipment Download PDFInfo
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- CN210068171U CN210068171U CN201920635934.0U CN201920635934U CN210068171U CN 210068171 U CN210068171 U CN 210068171U CN 201920635934 U CN201920635934 U CN 201920635934U CN 210068171 U CN210068171 U CN 210068171U
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Abstract
The utility model discloses a tunnel die-cast concrete support construction device, which comprises a steel support structure for supporting and fixing the whole device, wherein the steel support structure is anchored on the inner wall of the tunnel through an anchoring rod, a template for forming the die-cast concrete is fixedly arranged on the steel support structure, and the template is arranged along the inside of the tunnel from bottom to top; the template is detachably connected with the steel supporting structure through a steel mould clamp; a bottom sealing template used for sealing the bottom of the template is arranged between the template on the bottommost layer and the inner wall of the tunnel, and an end sealing template used for sealing the side end face opening of the template is arranged between the side end face of the template and the inner wall of the tunnel. This construction equipment that struts simple structure, convenient to use, the quality is controllable, satisfies current requirement, can effectually improve the tunnel die-shotcrete construction environment moreover, has improved the die and has spouted efficiency and quality, reduces construction cost.
Description
Technical Field
The utility model relates to a technical field is strutted in the tunnel construction, mainly provides a mainly used tunnel spouts concrete support's device.
Background
At present, a concrete sprayer is generally adopted for concrete spraying and supporting of a tunnel, surrounding rocks can be sealed in time, and the surrounding rocks are sprayed to the designed thickness layer by layer and in different times, so that the purpose of supporting is achieved. However, the concrete spraying support operation mode in the prior art has the following outstanding defects and shortcomings:
firstly, due to the limitation of operation modes and spraying equipment, large dust appears during operation, certain influence is brought to the working environment and operators, and even if advanced wet spraying equipment is adopted, the environmental conditions cannot be substantially improved.
And secondly, the rebound rate is over high during the operation of spraying concrete, the rebound rate is generally over 30 percent, and especially the rebound of the sprayed concrete at the arch crown part is higher, so that more concrete materials are wasted, and the engineering cost is increased.
Thirdly, the operation efficiency of the concrete spraying is low, when the concrete spraying thickness is larger, the design thickness can be achieved only by multiple times and multiple layers of implementation, more working procedure time is occupied, and the construction speed of the tunnel is limited to a certain extent.
Fourthly, the method is limited to the influence of the excavation quality of the tunnel, the thickness of sprayed concrete is not uniform, the surface of the concrete is not flat, and the supporting effect is influenced; especially for the tunnel adopting the sprayed concrete as the permanent support, the project image is also influenced to a certain extent.
Fifthly, the defects of unstable quality, uneven thickness, substandard strength, uneven surface and the like of the sprayed concrete are common defects of the sprayed concrete operation. After the tunnel runs for a period of time, the conditions of cracks, falling, peeling and the like are common, and some tunnels even collapse; the situation is more obvious when the surrounding rock conditions are poor.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model aims at providing a tunnel die-casting concrete support construction equipment, through this construction equipment and method, this support construction equipment simple structure, convenient to use, the quality is controllable, satisfies current requirement, can effectually improve tunnel die-casting concrete construction environment moreover, has improved the mould and has spouted efficiency and quality, reduces construction cost.
In order to realize the technical characteristics, the purpose of the utility model is realized as follows: the construction device for the die-cast concrete support of the tunnel comprises a steel supporting structure for supporting and fixing the whole device, wherein the steel supporting structure is anchored on the inner wall of the tunnel through an anchoring rod, a template for forming the die-cast concrete is fixedly arranged on the steel supporting structure, and the template is arranged along the inside of the tunnel from bottom to top in sequence; the template is detachably connected with the steel supporting structure through a steel mould clamp; a bottom sealing template used for sealing the bottom of the template is arranged between the template on the bottommost layer and the inner wall of the tunnel, and an end sealing template used for sealing the side end face opening of the template is arranged between the side end face of the template and the inner wall of the tunnel.
The steel supporting structure comprises arc-shaped supporting channel steel arranged along the arc section of the tunnel, connecting holes matched with the anchoring rods are machined in the arc-shaped supporting channel steel and are fixed on the inner wall of the tunnel through the anchoring rods, and the arc-shaped supporting channel steel sections are fixedly connected through bolts; the steel supporting structures are arranged in groups of 3-5 steel frames, are independent and are used in a front-back turnover mode.
The anchoring rod adopts an original support anchor rod supported by a tunnel, and a welding bolt is fixedly connected with the steel support structure on the support anchor rod.
The template adopts a common shaping steel template, and templates with different widths and lengths are selected according to the section size of the tunnel; the templates are divided into a left group and a right group, and each group comprises 3-5 blocks which are used alternately.
For a full-circle tunnel constructed by adopting a TBM (tunnel boring machine), a construction track is laid on a bottom arch, and a set of mould-spraying concrete support trolley structure is adopted.
The utility model discloses there is following beneficial effect:
1. the steel supporting structure adopts a profile steel structure or utilizes permanent support, the template adopts a standard sizing steel template, the manufacturing, the installation and the movement are convenient, the next bin can be moved in a quicker time after the construction of each cycle is finished, the turnover use can be realized, and the cost is low.
2. The wet-type concrete spraying operation mode is adopted, the concrete is directly sprayed into the template, the operation is convenient, the control is easy, the concrete can be fully utilized, the resilience is almost avoided, the concrete cost is greatly saved, the dust is effectively controlled, and the operation environment is good.
3. The mold spraying is completed in a layered mode in multiple times, quality control is facilitated, the internal quality of the concrete is compact, the thickness and the strength are reliable, the surface is smooth, and the quality is guaranteed.
4. The construction speed is fast, and engineering efficiency is high, is favorable to parallel operation, is favorable to the tunnel construction speed to improve.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is the utility model discloses the section picture of tunnel mould spraying support construction.
Fig. 2 is the utility model discloses the section view of tunnel mould spouts the construction.
In the figure: the steel formwork comprises a bottom sealing formwork 1, a formwork 2, an end sealing formwork 3, bolts 4, anchoring rods 5, steel supporting structures 6, construction rails 7 and steel formwork clamps 8.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
Example 1:
referring to fig. 1-2, the tunnel mold-jet concrete support construction device comprises a steel support structure 6 for supporting and fixing the whole device, wherein the steel support structure 6 is anchored on the inner wall of the tunnel through an anchoring rod 5, a template 2 for mold-jet concrete forming is fixedly installed on the steel support structure 6, and the template 2 is installed along the inside of the tunnel from bottom to top in sequence; the template 2 is detachably connected with the steel supporting structure 6 through a steel mould clamp 8; a bottom sealing template 1 used for sealing the bottom of the template 2 is arranged between the template 2 at the bottommost layer and the inner wall of the tunnel, and an end sealing template 3 used for sealing the side end face opening of the template 2 is arranged between the side end face of the template 2 and the inner wall of the tunnel. Through adopting the mould-shotcrete support construction equipment of above-mentioned structure, can be used for the mould-shotcrete shaping of the inside concrete of tunnel, its simple structure, ann tear open remove convenient, can continuous construction, effectual improvement efficiency of construction, reduce construction cost, promote construction quality and be favorable to parallel operation.
Further, the steel supporting structure 6 comprises arc-shaped supporting channel steel arranged along the arc section of the tunnel, connecting holes used for being matched with the anchoring rods 5 are machined in the arc-shaped supporting channel steel and are fixed on the inner wall of the tunnel through the anchoring rods 5, and the arc-shaped supporting channel steel sections are fixedly connected through bolts 4; the steel supporting structures 6 are arranged in groups of 3-5 trusses, are independent and are used in a front-back turnover mode. The framework structure of the formwork support is formed by the steel support structure 6, and the framework structure is also a protection channel for parallel operation, channel steel with different specifications can be selected according to the section size of the tunnel, the thickness of sprayed concrete and the like, generally No. 12-20 channel steel is suitable, and a steel grating and the like can be adopted for the large-section tunnel; in order to facilitate manufacturing, transportation, installation, disassembly and movement, the steel plate can be manufactured in sections, the sections are connected into a rigid structure through bolts, and the overall dimension of the arc-shaped supporting channel steel is required to be consistent with the designed section of concrete; if the tunnel is designed to be supported by steel supports or steel grids, the designed permanent steel supports can be directly utilized.
Meanwhile, in order to be connected with the template 2 and the anchoring rod 5 conveniently, a certain number of connecting holes are drilled in the steel supporting structure 6 and are matched with the template and the connecting clamp. The steel support structure 6 is generally divided into a group of 3-5 trusses, each truss is independent, and the steel support structure can be used circularly in the front and back. The spacing of the steel support structures 6 can be adapted to the modulus of the selected shaping rigid template and is consistent with the length of a primary support section, and 1.2 meters or 1.5 meters is generally selected as the best distance. For the tunnel constructed by the TBM heading machine, a set of mould-spraying concrete supporting trolley can be designed due to the existing construction track on the bottom arch, so that the frequent mounting and dismounting of the steel supporting structure 6 are reduced, and the construction efficiency is improved.
Further, the anchoring rod 5 adopts an original support anchor rod supported by a tunnel, and a welding bolt is fixedly connected with the steel support structure 6 on the support anchor rod. However, in consideration of the reasons that the precision error, the quantity and the position of the anchor rod construction are not necessarily matched with the position of the steel support structure, and the like, a part of stress application anchor bars can be additionally arranged according to the situation, and bolts are welded on the stress application anchor bars to be connected with the steel supports.
Further, the template 2 adopts a common shaping steel template, and templates with different widths and lengths are selected according to the section size of the tunnel; the templates 2 are divided into a left group and a right group, and each group comprises 3-5 blocks which are used alternately. The templates with different widths and lengths can be selected according to the size of the section of the tunnel, and are generally 3012, 3015, 2012 and 2015. In order to be convenient to install and dismantle, the template is connected with the steel supporting structure 6 by adopting a special fixture, and the concrete spraying operation is carried out from bottom to top, and the template is installed, dismantled and circulated in time.
Further, for a full-circle tunnel constructed by adopting a TBM (tunnel boring machine), a construction track 7 is laid on a bottom arch, and a set of mould-spraying concrete support trolley structure is adopted.
Example 2:
the construction method of the tunnel die-cast concrete support construction device comprises the following steps,
step 1: manufacturing the steel supporting structure 6: manufacturing arc-shaped supporting channel steel section by section according to design requirements in a manufacturing workshop, pre-assembling the arc-shaped supporting channel steel section with the template 2, and numbering section by section after passing acceptance; the arc-shaped supporting channel steel adopts 12-20 channel steel, and a steel grating can also be adopted for a large-section tunnel;
step 2: installation of the steel support structure 6: firstly, accurately marking installation positions on two sides of a tunnel, utilizing the existing anchor rods as much as possible, if the existing anchor rods cannot be fully utilized or are not available, driving force anchor bars again according to the measurement positions, fixing the steel support structures 6 on the anchor rods, and considering certain template installation and removal allowance among the steel support structures 6;
and step 3: installation of the template 2: after the steel support structure 6 is installed in place, the installation of the bottom seal form 1 is completed, and the end seal form 3 is installed between the bottom end of the steel support structure 6 and the tunnel.
And 4, step 4: and (3) concrete spraying construction: after the equipment is in place, the materials are in place and the workers are fully finished, spraying concrete, spraying the concrete into the installed templates by using a wet concrete sprayer, spraying the concrete from the bottom feet on the two sides of the tunnel, gradually spraying the templates in a layering and grading manner strictly, then quickly removing the bottom template to the upper part, and continuing the next-layer template spraying construction; thus, the concrete spraying construction is completed from bottom to top and circularly and gradually; when the construction is carried out to the vault capping part, concrete spraying can be directly adopted for plugging in consideration of the convenience of the construction; usually, the two sides of the tunnel of one concrete spraying device are alternately sprayed, and when the engineering quantity is large and the strength requirement is high, the two devices can be synchronously carried out from the two sides of the tunnel.
And 5: dismantling and moving the steel supporting structure 6 and the template 2: after one circulation mold is used for spraying concrete, firstly removing the template 2, then removing the steel supporting structure 6, and then gradually transferring the steel supporting structure 6 to the next circulation construction; in order to ensure the continuous construction of concrete, the working procedures of installation of the steel supporting structure 6 and the template 2 and the like can be carried out in advance, and when the previous cycle operation is finished, the next cycle construction can be immediately carried out; when the permanent steel support is used, the construction cycle and the section length of the permanent steel support are matched with the excavation supporting process.
Step 6: and (3) eliminating and maintaining the die-sprayed concrete: after the steel supporting structure 6 and the formwork 2 are dismantled, the defects are eliminated in time, and then water mist is sprayed to maintain the die-sprayed concrete.
Furthermore, in the step 4, a mold-spraying concrete support construction process is adopted, firstly, the requirements on the characteristics of concrete, the water-cement ratio, additives, particularly an accelerator and the like are strict, and proper concrete indexes must be selected through strict experiments before the process is implemented so as to meet the requirements on concrete transportation, spraying and warehousing, demolding and the like; secondly, the performance requirement of concrete spraying equipment is strict, and high-performance spraying equipment must be selected to improve the construction efficiency; thirdly, the requirements on the quality of operation technical workers are strict, and a special and multifunctional technical worker and a construction management team must be selected to ensure the effective implementation of the process. The fundamental difference between this process and the conventional concrete-blasting process is that the concrete is directly sprayed into the formwork. When the preparation work is fully completed and one group of steel supports are fixed in place, two groups of templates on two sides of the tunnel are in place along with the steel supports and are reliably connected with the steel supports, the end plugs are in place, and the concrete spraying is started. The concrete spraying is carried out from footings on two sides of the tunnel, one concrete spraying device is adopted to alternately spray the two sides of the tunnel under the general condition, and when the engineering quantity is large and the strength requirement is high, two devices can be synchronously carried out from two sides of the tunnel. The concrete spraying must be carried out from bottom to top layer by layer, after the first layer of template is sprayed by layer for 200-300mm, the bottom layer of template can be removed and transferred to the upper layer for continuous turnover use, thus completing a cycle of concrete spraying operation from bottom to top step by step.
Claims (5)
1. Tunnel hole mould spouts concrete support construction equipment, its characterized in that: the device comprises a steel supporting structure (6) for supporting and fixing the whole device, wherein the steel supporting structure (6) is anchored on the inner wall of the tunnel through an anchoring rod (5), a template (2) for molding the die-sprayed concrete is fixedly installed on the steel supporting structure (6), and the template (2) is installed along the inside of the tunnel from bottom to top in sequence; the template (2) is detachably connected with the steel supporting structure (6) through a steel mould clamp (8); a bottom sealing template (1) used for sealing the bottom of the template (2) is arranged between the template (2) at the bottommost layer and the inner wall of the tunnel, and an end sealing template (3) used for sealing the side end face opening of the template (2) is arranged between the side end face of the template (2) and the inner wall of the tunnel.
2. The tunnel die-cast concrete support construction device according to claim 1, characterized in that: the steel supporting structure (6) comprises arc-shaped supporting channel steel arranged along the arc section of the tunnel, connecting holes used for being matched with the anchoring rods (5) are machined in the arc-shaped supporting channel steel and are fixed on the inner wall of the tunnel through the anchoring rods (5), and the arc-shaped supporting channel steel sections are fixedly connected through bolts (4); the steel supporting structures (6) are arranged in groups of 3-5 trusses, are independent and are used in a circulating mode in the front and the back.
3. The tunnel die-cast concrete support construction device according to claim 1, characterized in that: the anchoring rod (5) adopts an original support anchor rod supported by a tunnel, and a welding bolt is fixedly connected with the steel support structure (6) on the support anchor rod.
4. The tunnel die-cast concrete support construction device according to claim 1, characterized in that: the template (2) adopts a common shaping steel template, and templates with different widths and lengths are selected according to the section size of the tunnel; the templates (2) are divided into a left group and a right group, and each group comprises 3-5 blocks which are used alternately.
5. The tunnel die-cast concrete support construction device according to claim 1, characterized in that: for a full-circle tunnel constructed by a TBM (tunnel boring machine), a construction track (7) is laid on a bottom arch, and a set of mould-spraying concrete support trolley structure is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920635934.0U CN210068171U (en) | 2019-05-06 | 2019-05-06 | Tunnel mould spouts concrete support construction equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920635934.0U CN210068171U (en) | 2019-05-06 | 2019-05-06 | Tunnel mould spouts concrete support construction equipment |
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| CN210068171U true CN210068171U (en) | 2020-02-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043279A (en) * | 2019-05-06 | 2019-07-23 | 中国水利电力对外有限公司 | Tunnel mould shotcrete support constructing device and method |
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- 2019-05-06 CN CN201920635934.0U patent/CN210068171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043279A (en) * | 2019-05-06 | 2019-07-23 | 中国水利电力对外有限公司 | Tunnel mould shotcrete support constructing device and method |
| CN110043279B (en) * | 2019-05-06 | 2024-05-14 | 中国水利电力对外有限公司 | Tunnel mould spraying concrete support construction device and method |
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