CN105134264A - Bolting and shotcrete net propping construction process - Google Patents
Bolting and shotcrete net propping construction process Download PDFInfo
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- CN105134264A CN105134264A CN201510365687.3A CN201510365687A CN105134264A CN 105134264 A CN105134264 A CN 105134264A CN 201510365687 A CN201510365687 A CN 201510365687A CN 105134264 A CN105134264 A CN 105134264A
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- bolting
- explosion
- precast lining
- shotcreting
- net
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Abstract
The invention discloses a bolting and shotcrete net propping construction process, and relates to the technical field of shotcrete net propping. The process includes top cleaning after explosion of a drill hole, cleaning exploded spoils, boring in the exploded rock surface, placing resin capsules in the bored hole, during construction of an anchor pole, adding one prefabricated cushion block added between the exploded rock surface and a steel net, wherein one end of a screw sequentially passes through the steel net and the prefabricated cushion block and enters into the bored hole, and the other end of the bolt fastens a pallet onto the surface of the steel net through a fastening nut, and guniting into lane on the surface of the exploded rocker surface to form a support layer. The thickness of the support layer on the external side of the steel net reaches 20-30mm, the fastening nut is exposed outside the support layer, and the strength of the prefabricated cushion block is no less than that of the support layer. Inspection and fastening can be conducted at any time, hidden engineering quality problems can be avoided, the process is simplified, and one time guniting is required. The construction process saves time, and improves work efficiency.
Description
Technical field
The present invention relates to spray net support technology field, specifically a kind of bolting and shotcreting with wire mesh construction technology.
Background technology
Shotcrete technique is the main construction method of stone head, since last century, the fifties introduced China, has become the most frequently used construction method of underground construction stone head construction.Shotcrete technique breaches traditional support theory, gives full play to rock mass self-bearing capacity, and change passive protecting is active support, greatly reduces roadway support labour intensity, improves efficiency.
Shotcrete Rockbolt Support Technique construction mainly comprises drill eye blasting, bolt support and jetting cement three flow processs.In recent years, Shotcrete Rockbolt Support Technique, support material, supporting tool, construction technology are all in continuous progress.
As shown in Figure 1, traditional shotcrete construction technology is: drill eye blasting → go out spoil → bolt support → first whitewashing → the second gunite becomes lane.This technique has the following disadvantages: 1. anchor pole is hidden in below gunite layer, and be concealed work, unit in charge of construction easily uses inferior materials and turns out substandard goods, and construction quality cannot ensure; 2. anchor pole and mesh sheet are adjacent to scar, can not form complete prop with concrete, do not mate with sprinkler body is stressed, the stressed rear destructible of sprinkler body; 3. body of whitewashing is thicker, and repeatedly gunite layer bonding force is poor, and easy to crack dropping is hurted sb.'s feelings.
As shown in Figure 2, the bolt-spary supports technique of improvement is: drill eye blasting → go out spoil → first whitewashing → bolt support → the second gunite becomes lane.The process adds first shotcreting process, beaten on first gunite layer by anchor pole, solve the irrational defect in mesh sheet position, make supporting stressed more scientific, rock bolt head divides exposure, guaranteed to workmanship to a certain extent.But still have the following disadvantages: 1. add first shotcreting process, extend the engineering time, General Requirements 1 hours; 2. site operation is in order to race against time, and just spray coagulation result is bad, cannot ensure anchor rod prestress, anchor pole may be caused to lose efficacy; 3. repeatedly whitewash, interlaminar bonding is bad, easily drops and hurts sb.'s feelings, dangerous; 4. cannot accomplish that anchor nut secondary is fastening.
Summary of the invention
In order to solve bolting with wire mesh mesh sheet position not science and anchor pole concealed work quality problems, the invention provides a kind of bolting and shotcreting with wire mesh construction technology, can carry out at any time checking, fastening, avoid concealed work quality problems; Simplified flowsheet, once whitewashes, and saves time, and increases work efficiency.
The present invention realizes with following technical scheme: a kind of bolting and shotcreting with wire mesh construction technology, comprises drill eye blasting → go out spoil → bolt support → once whitewash into lane; Detailed process is as follows:
1), after drill eye blasting, carry out looking for top;
2) clear up the spoil after explosion, explosion scar holed, in boring, places resin explosive roll,
3) during anchor bolt construction, between explosion scar and reinforced mesh, increase precast lining, one end of screw rod enters in boring through reinforced mesh, precast lining successively, and pallet is fastened on reinforced mesh surface by clamp nut by the other end;
4) whitewash into lane to explosion scar and form a sheath, supporting ability thickness 20 ~ 30mm outside reinforced mesh, clamp nut is exposed outside a sheath; The intensity of precast lining is not less than the intensity of a sheath.
It is further: precast lining adopts concrete or Prefabricated reinforced concrete.
Precast lining is square or circular.
The invention has the beneficial effects as follows: after explosion goes out cash, the supporting of anchor pole net can be carried out, do not need to carry out just spray, rest without technique, save at least two hours stand-by period of construction, raise the efficiency; Reinforced mesh occupy whitewashing body peripheral, forms complete prop with whitewashing body; The clamp nut of anchor pole exposes, and can carry out at any time checking, fastening, avoids concealed work quality problems.
Accompanying drawing explanation
Fig. 1 is conventional anchor net supporting and protection structure schematic diagram;
Fig. 2 is the anchor pole net supporting and protection structure schematic diagram optimized;
The anchor pole net supporting and protection structure schematic diagram that Fig. 3 is formed for the present invention.
In figure: 1. pallet; 2. clamp nut; 3. reinforced mesh; 4. anchor pole; 5. explosion scar; 6. a sheath; 7. precast lining.
Detailed description of the invention
A kind of bolting and shotcreting with wire mesh construction technology, comprises drill eye blasting → go out spoil → bolt support → once whitewash into lane; Detailed process is as follows:
1), after drill eye blasting, carry out looking for top;
2) clear up the spoil after explosion, explosion scar holed, in boring, places resin explosive roll,
3) during anchor bolt construction, between explosion scar and reinforced mesh, increase precast lining, one end of screw rod enters in boring through reinforced mesh, precast lining successively, and pallet is fastened on reinforced mesh surface by clamp nut by the other end;
4) whitewash into lane to explosion scar and form a sheath, a covering thickness meets the requirement of reinforced mesh topping, and anchor rod pallet board and clamp nut expose; The intensity of precast lining is not less than the intensity of a sheath.
Precast lining adopts concrete or Prefabricated reinforced concrete, and intensity is generally not less than C30, visual requirement of strength whether reinforcement.Precast lining is square or circular, the not little pallet of specification.Precast lining thickness can control shotcrete thickness, thickness generally at 30 ~ 50mm, depending on shotcrete thickness requirement, adjustable.Shotcrete thickness 20 ~ 30mm beyond reinforced mesh, plays the effect of protection reinforced mesh, general selection 25mm.
As shown in Figure 3, one end of anchor pole 4 enters in boring through reinforced mesh 3, precast lining 7 successively, and pallet 1 is fastened on reinforced mesh 3 external surface by clamp nut 2 by the other end in the mechanism that new technology of the present invention is formed; The inside of precast lining 7 againsts explosion scar 5, and outside againsts surface in reinforced mesh 3, whitewashes to explosion scar 5, forms a sheath 6.Wherein, clamp nut 2 is exposed outside sheath 6, conveniently carries out checking, fastening.
Claims (4)
1. a bolting and shotcreting with wire mesh construction technology, is characterized in that: comprise drill eye blasting → go out spoil → bolt support → once whitewash into lane; Detailed process is as follows:
1), after drill eye blasting, carry out looking for top;
2) clear up the spoil after explosion, explosion scar holed, in boring, places resin explosive roll,
3) during anchor bolt construction, between explosion scar and reinforced mesh, increase precast lining, one end of screw rod enters in boring through reinforced mesh, precast lining successively, and pallet is fastened on reinforced mesh surface by clamp nut by the other end;
4) whitewash into lane to explosion scar and form a sheath, supporting ability thickness 20 ~ 30mm outside reinforced mesh, clamp nut is exposed outside a sheath; The intensity of precast lining is not less than the intensity of a sheath.
2. a kind of bolting and shotcreting with wire mesh construction technology according to claim 1, is characterized in that: precast lining adopts concrete or Prefabricated reinforced concrete.
3. a kind of bolting and shotcreting with wire mesh construction technology according to claim 1, is characterized in that: precast lining is square or circular.
4. a kind of bolting and shotcreting with wire mesh construction technology according to any one of claim 1-3, is characterized in that: the not little pallet of precast lining specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365687.3A CN105134264B (en) | 2015-06-29 | 2015-06-29 | A kind of bolting and shotcreting with wire mesh construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365687.3A CN105134264B (en) | 2015-06-29 | 2015-06-29 | A kind of bolting and shotcreting with wire mesh construction technology |
Publications (2)
| Publication Number | Publication Date |
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| CN105134264A true CN105134264A (en) | 2015-12-09 |
| CN105134264B CN105134264B (en) | 2018-04-10 |
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| CN201510365687.3A Active CN105134264B (en) | 2015-06-29 | 2015-06-29 | A kind of bolting and shotcreting with wire mesh construction technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661663A (en) * | 2017-03-28 | 2018-10-16 | 北京爱卓达科技有限公司 | A kind of method of reinforcing insulating protection net in rough tunnel |
| CN111379580A (en) * | 2020-03-18 | 2020-07-07 | 中铁十六局集团第三工程有限公司 | Tunnel primary support protection construction method |
| CN113107524A (en) * | 2021-04-06 | 2021-07-13 | 淮北市平远软岩支护工程技术有限公司 | Supporting method for roadway specially used for treating rock burst and application |
-
2015
- 2015-06-29 CN CN201510365687.3A patent/CN105134264B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661663A (en) * | 2017-03-28 | 2018-10-16 | 北京爱卓达科技有限公司 | A kind of method of reinforcing insulating protection net in rough tunnel |
| CN108661663B (en) * | 2017-03-28 | 2020-06-30 | 北京爱卓达科技有限公司 | Method for reinforcing insulating protective net in lining-free tunnel |
| CN111379580A (en) * | 2020-03-18 | 2020-07-07 | 中铁十六局集团第三工程有限公司 | Tunnel primary support protection construction method |
| CN113107524A (en) * | 2021-04-06 | 2021-07-13 | 淮北市平远软岩支护工程技术有限公司 | Supporting method for roadway specially used for treating rock burst and application |
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| Publication number | Publication date |
|---|---|
| CN105134264B (en) | 2018-04-10 |
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