CN104675418A - Underground-excavation primary support grid connector and primary support engineering construction method adopting same - Google Patents
Underground-excavation primary support grid connector and primary support engineering construction method adopting same Download PDFInfo
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- CN104675418A CN104675418A CN201510053989.7A CN201510053989A CN104675418A CN 104675418 A CN104675418 A CN 104675418A CN 201510053989 A CN201510053989 A CN 201510053989A CN 104675418 A CN104675418 A CN 104675418A
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- 238000010276 construction Methods 0.000 title claims abstract description 66
- 238000009412 basement excavation Methods 0.000 title abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000005641 tunneling Effects 0.000 claims description 18
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 238000003032 molecular docking Methods 0.000 claims description 13
- 230000008439 repair process Effects 0.000 abstract description 14
- 238000003466 welding Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 210000001503 joint Anatomy 0.000 abstract 2
- 238000009435 building construction Methods 0.000 abstract 1
- 238000011900 installation process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Connection Of Plates (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to the field of civil engineering building construction, in particular to an underground-excavation primary support grid connector and a primary support engineering construction method adopting the same. The underground-excavation primary support grid connector comprises two connecting plates, the two connecting plates are arranged at the butt joint ends of two butt joint grid segments correspondingly respectively, and locking pieces are arranged between the two connecting plates and are used for fixing relative positions of the two connecting plates to enable the two connecting plates to be separated from each other. Compared with a traditional connector, the underground-excavation primary support grid connector has the advantages that material filling and repair welding are no longer required for a gap between the connecting plates, and accordingly, material filling and repair welding period and cost are saved, and construction difficulties in a grid segment alignment mounting process are lowered.
Description
Technical field
The present invention relates to civil engineering work construction field, be specifically related to first the engineering construction method that tunneling is just propped up grid connecting and adopted this connector.
Background technology
In civil construction project, the first Zhi Tongchang of underground project dug underground adopts grid concrete structure, be specially, when local soil excavation completes needs first construction, first arrange grid, then grid wraps up by sprayed mortar, and grid as reinforcing rib, and then forms the good grid concrete structure of mechanical property.
In practice of construction process, on the one hand, when Zhi Changdu is longer originally, segmentation is usually needed to carry out a just construction; On the other hand, for the ease of the installation in the manufacture of grid, transport and work progress, the length of grid is all not easily long, so, based on above-mentioned two aspects, all segmented carrying out in first current engineering construction, namely, first single-unit grid is installed, and then this joint grid is wrapped in interior formation grid concrete structure by sprayed mortar completely, installs the grid of next sections again, and then carry out concrete injection after the construction of this sections, so, repeat according to above-mentioned steps successively until a whole just engineering construction completes.
In an above-mentioned just construction process, because whole work progress is segmented carrying out, separate between each grid sections, and in order to ensure that grid concrete structure has excellent mechanical property, so need to each independently grid sections connect, current form of construction work is: arrange junction plate in the connecting end portion of grid sections, junction plate is provided with connecting hole, when grid sections is installed, first the docking end concrete of the grid sections wrapped up by concrete is chiseled, make the junction plate with holes of grid sections docking end out exposed, then by the contraposition with it of the junction plate of next grid sections, again by connection that shank of bolt realizes grid sections through the connecting hole on two junction plates.
Although, the good grid concrete structure of mechanical property finally can be obtained by above-mentioned structure and construction method thereof, but, inventor finds in practice of construction process, said structure and construction method is adopted still to there is weak point, be embodied in the connection operation of grid sections, on the one hand, when digging the concrete covered on junction plate, not only need by docking two junction plates between concrete chisel completely, give the placement space that the docking end of shank of bolt and grid sections to be installed is enough, but also need the side deviating from grid sections to be installed at junction plate to dig out enough spaces, to make it possible to smoothly shank of bolt be passed from the grid sections be fixed, and then through the junction plate on grid sections to be installed, ensure that the locking nut of shank of bolt is positioned at grid sections place to be installed with this, and make locking operation have enough spaces to avoid concrete obstruction.
On the other hand, current grid sections is after shank of bolt locking, requirement between adjacent two junction plates is for fitting tightly, because fit between junction plate closely and form gap time, because gap is too small, concrete can not enter gap and fill up, the grid concrete inside configuration finally obtained is caused to there is gap, the force request in mechanical property can not be met, so, at present, when adjacent two junction plates are after locking, if there is gap between it, then need first reinforced repair welding to be carried out to gap and eliminate gap, and then carry out concrete injection, ensure that grid concrete has good structural strength with this.
So, in first current engineering construction, when carrying out docking construction to each grid sections, all need to dig concrete, reinforced repair welding is carried out in the gap between also needing junction plate, so, this docking operation is made not only to have larger difficulty of construction, but also waste material, work consuming is consuming time, significantly increase construction cost, fail to meet the time limit of a project.
So based on above-mentioned, needing one at present badly can not only the reduction of erection time, reduces difficulty of construction, saves construction cost, and can also ensure structure and the method for just propping up engineering construction of construction quality.
Summary of the invention
The object of the invention is to: large for there is difficulty of construction in an existing just engineering construction, construction period is long, the problem that construction cost is high, there is provided one can not only the reduction of erection time, reduce difficulty of construction, save construction cost, and can also ensure that the tunneling of construction quality is just propped up grid connecting and adopted first engineering construction method of this connector.
To achieve these goals, the technical solution used in the present invention is:
A kind of tunneling just props up grid connecting, include two junction plates, the docking end being arranged in the grid sections of two docking that two described junction plates are corresponding respectively, the locking member fixing its relative position is also furnished with between two junction plates, it is characterized in that, described locking member fix two junction plates relative position, make to be spaced from each other between two junction plates; The first nut, the second nut and the 3rd nut that described locking member includes shank of bolt and is threaded thereon, described shank of bolt is successively through two described junction plates, described first nut coordinates with the bolt head of described shank of bolt, realize described shank of bolt and relative position fixing between junction plate described in one of them, described second nut and the 3rd nut lay respectively at the both sides of another junction plate, realize fixing relative position between another junction plate and shank of bolt.Tunneling of the present invention just props up grid connecting, after connection grid sections, be spaced from each other between the junction plate be connected, concrete is sprayed and enters between junction plate, fill the gap between junction plate, more traditional connector, do not need to carry out reinforced repair welding to the gap between junction plate again, so, duration and the cost of reinforced repair welding are not only saved, and do not need between junction plate to fit tightly, so also reduce the difficulty of construction in grid sections contraposition installation process, and, spaced apart due to junction plate, so when digging concrete, the end of grid sections to be installed can be avoided to contact with concrete by regulating the isolated distance of junction plate, so do not need the concrete digging out placement grid sections to be installed connecting end portion, so also further saved construction cost, shorten the duration.The present invention arranges the first nut, the second nut and the 3rd nut on shank of bolt, in connection procedure, can by rotating the spacing that the second nut controls between relative two junction plates, make in practice of construction, gap length between two junction plates can be regulated according to actual condition or concrete performance, facilitate while connecting between grid sections, also enable connector of the present invention use under various operating mode.
As preferably, correspondingly respectively on two junction plates be provided with through hole, described locking member is connected with two junction plates respectively by through hole, and what realize relative position between two junction plates is fixing.
As preferably, described junction plate is angle steel, and a side of described angle steel is connected with described grid sections, and described through hole is arranged on another side of described angle steel.Select angle steel as junction plate, a side of angle steel is connected with grid sections, the bonding strength between guarantee angle steel that can be good and grid sections.
As preferably, correspondingly respectively on two junction plates be provided with breach, described in the Assurance of Size of described breach, shank of bolt can be inserted from breach, and described locking member is connected with two junction plates respectively by breach, realizes fixing relative position between two junction plates.Adopt breach, when passing two junction plates with shank of bolt, shank of bolt can directly be placed as in breach, realizes the connection to two junction plates, and does not need the junction plate installed by being fixed as described in the background art to pass again through junction plate to be installed, so, then no longer need the concrete solidified to be dug out the space of wearing required for shank of bolt, so, further decrease concrete cutting amount, further save the duration, reduce difficulty of construction and construction cost.
As preferably, described junction plate is angle steel, and a side of described angle steel is connected with described grid sections, and described breach is arranged on another side of described angle steel.
An a kind of just engineering construction method, comprises the steps: successively
(1), install first joint grid sections, the end of described grid sections is provided with junction plate, and described junction plate is provided with breach;
(2), sprayed mortar: grid sections sprayed mortar is saved to the head be in place in step (), in this head joint grid sections is wrapped in by concrete completely;
(3), next grid sections is installed: after step (two) concrete ejection completes, next grid sections is installed, leave the spacing being greater than two nut thickness between the junction plate of adjacent two grid sections, and with locking member, this joint grid sections and upper one are saved grid sections and carry out the formula structure that is connected to form one;
(4), sprayed mortar: to the grid sections sprayed mortar installed in step (three), in this joint grid sections is wrapped in by concrete completely, and save concrete corresponding to grid sections to be connected to form one formula concrete structure with upper one, in connecting end portion between the grid sections installed in step (three) and grid sections is wrapped in by concrete completely, and make also to fill full concrete completely between two junction plates of connector;
(5), step (three) and (four) is repeated, until a whole just engineering completes.
Adopt tunneling of the present invention just to prop up grid connecting and carry out a just engineering construction, due to after completing grid sections and installing, the spaced apart of the junction plate be connected has suitable distance, concrete can spray and enter between junction plate, fill the gap between junction plate, more traditional connector, do not need to carry out reinforced repair welding to the gap between junction plate again, so, duration and the cost of reinforced repair welding are not only saved, and do not need between junction plate to fit tightly, so also reduce the difficulty of construction in grid sections contraposition installation process, and, because the spaced apart of junction plate has suitable distance, so when digging concrete, do not need to dig out placement grid sections to be installed connecting end portion concrete, so also further saved construction cost, shorten the duration.
As preferably, described step (three), comprises the following step set gradually:
(three a), chisel concrete: the concrete chiseling a grid sections junction plate place, makes the breach on junction plate come out, and then chisel the concrete of corresponding position, breach both sides, breach both sides are had and places the bolt head of shank of bolt and the space of nut;
(three b), first sheathed first nut on described shank of bolt, again shank of bolt is snapped in and be fixed in the breach of the junction plate installed, the bolt head of shank of bolt and the first nut lay respectively at the both sides of this junction plate, then tighten the first nut, and shank of bolt is fixedly connected with this junction plate;
(three c), on shank of bolt sheathed second nut, and the second nut is rotated the middle part to shank of bolt;
(three d), grid sections to be installed of slinging, in the breach snapping in grid sections upper junction plate to be installed making shank of bolt corresponding, junction plate and second nut of grid sections to be installed are adjacent to, and ensure that the first nut and the second nut are between corresponding two junction plates simultaneously;
(three e), rotate the second nut, make the isolated distance of two corresponding junction plates reach designing requirement;
(three f), on shank of bolt sheathed 3rd nut, and tighten the 3rd nut, the relative position between grid sections to be installed and the grid sections be fixed fixed.
In a just engineering construction of the present invention, first shank of bolt is connected with the grid sections be fixed, and then contraposition installation is carried out to grid sections to be installed, adjust with position, the size spaced apart of two junction plates is controlled by the position of the second nut, whole docking operation and position adjustment can both be carried out easily, not only reduce difficulty of construction, but also improve the merging precision between grid sections; In whole connection procedure, because bolt snaps in breach, so do not need to dig concrete on a large scale, so, not only save the duration, but also reduced difficulty of construction, save construction cost.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, more traditional connector, does not need to carry out reinforced repair welding to the gap between junction plate again, has not only saved duration and the cost of reinforced repair welding;
2, do not need between junction plate to fit tightly, reduce the difficulty of construction in grid sections contraposition installation process.
In the present invention, other embodiments bring beneficial effect:
In the connection procedure of connector, due to junction plate being provided with breach, bolt snaps in breach, so do not need to dig concrete on a large scale, so, not only saved the duration, but also reduced difficulty of construction, saved construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that grid connecting connection grid sections is just propped up in tunneling of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is structural representation junction plate being arranged through hole;
Fig. 4 for through hole on junction plate substitute by breach after structural representation;
Fig. 5 is the structural representation of step 2 in a just engineering construction method of the present invention;
Fig. 6 is the structural representation of step 3 a;
Fig. 7 is the structural representation of step 3 b;
Fig. 8 is the structural representation of step 3 c and step 3 d;
Fig. 9 is the structural representation of step 3 e and step 3 f;
Figure 10 is the structural representation of step 4,
Mark in figure: 1-grid sections, 2-junction plate, 3-locking member, 4-through hole, 5-shank of bolt, 6a-first nut, 6b-second nut, 6c-the 3rd nut, 7-breach.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
embodiment 1
A kind of tunneling just props up grid connecting, include two junction plates 2, the docking end being arranged in the grid sections 1 of two docking that two described junction plates 2 are corresponding respectively, the locking member 3 fixing its relative position is also furnished with between two described junction plates 2, when the relative position of two described junction plates 2 fixed by described locking member 3, be spaced from each other between two described junction plates 2.
Just prop up in grid connecting in the tunneling of the present embodiment, owing to being spaced from each other suitable distance between junction plate 2, this suitable distance enables concrete spray to enter between junction plate 2, fill the gap between junction plate 2, more traditional connector, do not need to carry out reinforced repair welding to the gap between junction plate 2 again, so, duration and the cost of reinforced repair welding are not only saved, and do not need between junction plate 2 to fit tightly, so also reduce the difficulty of construction in grid sections 1 contraposition installation process, and, spaced apart due to junction plate 2, so when digging concrete, the end of grid sections 1 to be installed can be avoided to contact with concrete by regulating the isolated distance of junction plate 2, so do not need the concrete digging out placement grid sections 1 to be installed connecting end portion, so also further saved construction cost, shorten the duration.
embodiment 2
Just propping up on the basis of grid sections connecting-piece structure as described in Example 1, adopt further preferred version, correspondingly respectively on two described junction plates 2 be provided with through hole 4, described locking member 3 by described through hole 4 respectively junction plate 2 described with two be connected, realize fixing relative position between two described junction plates 2, described locking member 3 include shank of bolt 5 and be threaded thereon the first nut 6a, second nut 6b and the 3rd nut 6c, described shank of bolt 5 passes two described junction plates 2 successively by described through hole 4, described first nut 6a coordinates with the bolt head of described shank of bolt 5, realize described shank of bolt 5 and relative position fixing between junction plate 2 described in one of them, described second nut 6b and the 3rd nut 6c lays respectively at the both sides of another junction plate 2, realize fixing relative position between another junction plate 2 and shank of bolt 5, described junction plate 2 is angle steel, one side of described angle steel is connected with described grid sections 1, described through hole 4 is arranged on another side of described angle steel.
In the present embodiment, junction plate 2 arranges through hole 4, shank of bolt 5 arranges the first nut 6a, the second nut 6b and the 3rd nut 6c, in connection procedure, can, by rotating the spacing that the second nut 6b controls between relative two junction plates 2, making in practice of construction, gap length between two junction plates 2 can be regulated according to actual condition or concrete performance, facilitate while connecting between grid sections 1, also enable connector of the present invention use under various operating mode.
embodiment 3
Just propping up on the basis of grid sections connecting-piece structure described in embodiment 2, substituted by breach 7 by through hole 4, described in the Assurance of Size of described breach 7, shank of bolt 5 can be inserted from breach 7.
In the present embodiment, breach 7 is adopted to replace through hole 4, when passing two junction plates 2 with shank of bolt 5, shank of bolt 5 can directly be placed as in breach 7, realize the connection to two junction plates 2, and do not need the junction plate 2 installed by being fixed as described in the background art to pass again through junction plate 2 to be installed, so, then no longer need the concrete solidified to be dug out the space of wearing required for shank of bolt 5, so, further decrease concrete cutting amount, further saved the duration, reduce difficulty of construction and construction cost.
embodiment 4
Adopt the tunneling of the above embodiment of the present invention 3 just to prop up grid connecting and carry out first construction of propping up engineering, be followed successively by following step:
(1), install first joint grid sections 1, the end of described grid sections 1 is provided with junction plate 2, and described junction plate 2 is provided with breach 7;
(2), sprayed mortar: grid sections 1 sprayed mortar is saved to the head be in place in step (), in this head joint grid sections 1 is wrapped in by concrete completely;
(3), next grid sections 1 is installed: after step (two) concrete ejection completes, next grid sections 1 is installed, leave the spacing being greater than two nut 6 thickness between the junction plate 2 of adjacent two grid sections 1, and with locking member 3, this joint grid sections 1 and upper is saved grid sections 1 and carry out the formula structure that is connected to form one;
(4), sprayed mortar: to grid sections 1 sprayed mortar installed in step (three), in this joint grid sections 1 is wrapped in by concrete completely, and save concrete corresponding to grid sections 1 to be connected to form one formula concrete structure with upper one, in connecting end portion between the grid sections 1 installed in step (three) and grid sections 1 is wrapped in by concrete completely, and make also to fill full concrete completely between two junction plates 2 of connector;
(5), step (three) and (four) is repeated, until a whole just engineering completes.
Adopt tunneling of the present invention just to prop up grid connecting and carry out a just engineering construction, due to after completing grid sections 1 and installing, the spaced apart of the junction plate 2 be connected has suitable distance, concrete can spray and enter between junction plate 2, fill the gap between junction plate 2, more traditional connector, do not need to carry out reinforced repair welding to the gap between junction plate 2 again, so, duration and the cost of reinforced repair welding are not only saved, and do not need between junction plate 2 to fit tightly, so also reduce the difficulty of construction in grid sections 1 contraposition installation process, and, because the spaced apart of junction plate 2 has suitable distance, so when digging concrete, do not need to dig out placement grid sections 1 to be installed connecting end portion concrete, so also further saved construction cost, shorten the duration.
Described step (three), comprises the following step set gradually:
(three a), chisel concrete: the concrete chiseling grid sections 1 junction plate 2 place, breach 7 on junction plate 2 is come out, and then chisel the concrete of corresponding position, breach 7 both sides, breach 7 both sides are had and places the bolt head of shank of bolt 5 and the space of nut 6;
(three b), first sheathed first nut 6a on described shank of bolt 5, again shank of bolt 5 is snapped in and be fixed in the breach 7 of the junction plate 2 installed, the bolt head of shank of bolt 5 and the first nut 6a lay respectively at the both sides of this junction plate 2, then tighten the first nut 6a, shank of bolt 5 is fixedly connected with this junction plate 2;
(three c), on shank of bolt 5 sheathed second nut 6b, and the second nut 6b is rotated the middle part to shank of bolt 5;
(three d), grid sections 1 to be installed of slinging, in the breach 7 snapping in grid sections 1 upper junction plate 2 to be installed making shank of bolt 5 corresponding, the junction plate 2 of grid sections 1 to be installed and the second nut 6b are adjacent to, and ensure that the first nut 6a and the second nut 6b is between corresponding two junction plates 2 simultaneously;
(three e), rotate the second nut 6b, make the isolated distance of two corresponding junction plates 2 reach designing requirement;
(three f), on shank of bolt 5 sheathed 3rd nut 6c, and tighten the 3rd nut 6c, the relative position between grid sections 1 to be installed and the grid sections 1 be fixed fixed.
Owing to have employed structure of the present invention and method, the installation of each grid sections 1 can both save the duration, reduce difficulty of construction, save construction cost, and for the construction of the whole just engineering be made up of some grid sections 1, under the prerequisite ensureing workmanship, duration and construction cost are saved greatly.
All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a tunneling just props up grid connecting, include two junction plates, the docking end being arranged in the grid sections of two docking that two described junction plates are corresponding respectively, the locking member fixing its relative position is also furnished with between two junction plates, it is characterized in that, described locking member fix two junction plates relative position, make to be spaced from each other between two junction plates.
2. tunneling according to claim 1 just props up grid connecting, it is characterized in that, the first nut, the second nut and the 3rd nut that described locking member includes shank of bolt and is threaded thereon, described shank of bolt is successively through two described junction plates, described first nut coordinates with the bolt head of described shank of bolt, realize described shank of bolt and relative position fixing between junction plate described in one of them, described second nut and the 3rd nut lay respectively at the both sides of another junction plate, realize fixing relative position between another junction plate and shank of bolt.
3. tunneling according to claim 1 just props up grid connecting, it is characterized in that, correspondingly respectively on two junction plates be provided with through hole, described locking member is connected with two junction plates respectively by through hole, and what realize relative position between two junction plates is fixing.
4. tunneling according to claim 3 just props up grid connecting, it is characterized in that, described junction plate is angle steel, and a side of described angle steel is connected with described grid sections, and described through hole is arranged on another side of described angle steel.
5. the tunneling according to claim 1 any one just props up grid connecting, it is characterized in that, correspondingly respectively on two junction plates be provided with breach, described in the Assurance of Size of described breach, shank of bolt can be inserted from breach, described locking member is connected with two junction plates respectively by breach, realizes fixing relative position between two junction plates.
6. tunneling according to claim 5 just props up grid connecting, it is characterized in that, described junction plate is angle steel, and a side of described angle steel is connected with described grid sections, and described breach is arranged on another side of described angle steel.
7. adopt the tunneling described in claim 1 just to prop up a first engineering construction method of grid connecting, it is characterized in that, comprise the steps: successively
(1), install first joint grid sections, the end of described grid sections is provided with junction plate, and described junction plate is provided with breach;
(2), sprayed mortar: grid sections sprayed mortar is saved to the head be in place in step (), in this head joint grid sections is wrapped in by concrete completely;
(3), next grid sections is installed: after step (two) concrete ejection completes, next grid sections is installed, leave the spacing being greater than two nut thickness between the junction plate of adjacent two grid sections, and with locking member, this joint grid sections and upper one are saved grid sections and carry out the formula structure that is connected to form one;
(4), sprayed mortar: to the grid sections sprayed mortar installed in step (three), in this joint grid sections is wrapped in by concrete completely, and save concrete corresponding to grid sections to be connected to form one formula concrete structure with upper one, in connecting end portion between the grid sections installed in step (three) and grid sections is wrapped in by concrete completely, and make also to fill full concrete completely between two junction plates of connector;
(5), step (three) and (four) is repeated, until a whole just engineering completes.
8. a just engineering construction method according to claim 7, is characterized in that described step (three) comprises the following step set gradually:
(three a), chisel concrete: the concrete chiseling a grid sections junction plate place, makes the breach on junction plate come out, and then chisel the concrete of corresponding position, breach both sides, breach both sides are had and places the bolt head of shank of bolt and the space of nut;
(three b), first sheathed first nut on described shank of bolt, again shank of bolt is snapped in and be fixed in the breach of the junction plate installed, the bolt head of shank of bolt and the first nut lay respectively at the both sides of this junction plate, then tighten the first nut, and shank of bolt is fixedly connected with this junction plate;
(three c), on shank of bolt sheathed second nut, and the second nut is rotated the middle part to shank of bolt;
(three d), grid sections to be installed of slinging, in the breach snapping in grid sections upper junction plate to be installed making shank of bolt corresponding, junction plate and second nut of grid sections to be installed are adjacent to, and ensure that the first nut and the second nut are between corresponding two junction plates simultaneously;
(three e), rotate the second nut, make the isolated distance of two corresponding junction plates reach designing requirement;
(three f), on shank of bolt sheathed 3rd nut, and tighten the 3rd nut, the relative position between grid sections to be installed and the grid sections be fixed fixed.
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| CN201510053989.7A CN104675418B (en) | 2015-02-03 | 2015-02-03 | Primary support engineering construction method adopting underground-excavation primary support grid connector |
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| CN201510053989.7A CN104675418B (en) | 2015-02-03 | 2015-02-03 | Primary support engineering construction method adopting underground-excavation primary support grid connector |
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| CN104675418B CN104675418B (en) | 2017-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084518A (en) * | 2017-05-22 | 2017-08-22 | 中国五冶集团有限公司 | Large-scale arc-shape wind pipe |
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| CN204457811U (en) * | 2015-02-03 | 2015-07-08 | 北京建工土木工程有限公司 | Tunneling just props up grid connecting |
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|---|---|---|---|---|
| DE3919277C1 (en) * | 1989-06-13 | 1990-08-09 | Johannes Radtke | Yielding arch support in mine - has arch segments connected by sliding system |
| KR20110029421A (en) * | 2009-09-15 | 2011-03-23 | 강원대학교산학협력단 | Timbering structure for tunnel and construction method thereof |
| CN102587936A (en) * | 2012-04-01 | 2012-07-18 | 中国矿业大学 | Fully-enclosed integral assembly grid concrete support method |
| CN103967508A (en) * | 2014-04-24 | 2014-08-06 | 西南交通大学 | Stretchable quick stress compensation type steel frame connection structure |
| CN204457811U (en) * | 2015-02-03 | 2015-07-08 | 北京建工土木工程有限公司 | Tunneling just props up grid connecting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084518A (en) * | 2017-05-22 | 2017-08-22 | 中国五冶集团有限公司 | Large-scale arc-shape wind pipe |
| CN107084518B (en) * | 2017-05-22 | 2019-07-30 | 中国五冶集团有限公司 | Large-scale arc-shape wind pipe |
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| CN104675418B (en) | 2017-02-22 |
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