CN211228414U - Assembled reinforcing steel bar pipe sheet for rapid lining of U-shaped tunnel - Google Patents
Assembled reinforcing steel bar pipe sheet for rapid lining of U-shaped tunnel Download PDFInfo
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- CN211228414U CN211228414U CN201921924670.7U CN201921924670U CN211228414U CN 211228414 U CN211228414 U CN 211228414U CN 201921924670 U CN201921924670 U CN 201921924670U CN 211228414 U CN211228414 U CN 211228414U
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Abstract
The utility model discloses an assembled reinforcing bar section of jurisdiction shape tunnel quick lining, including capping reinforcing bar net piece and at least a pair of side wall reinforcing bar net piece, every to the side wall reinforcing bar net piece set up respectively at the both ends of capping reinforcing bar net piece and constitute the horseshoe with the capping reinforcing bar net piece, and have anchor portion between capping piece and the side wall piece, the assembly method who utilizes this reinforcing bar section of jurisdiction has been disclosed simultaneously, at first install the side wall reinforcing bar net piece, then install the capping reinforcing bar net piece, continue to install next lining cutting unit after encapsulating, until accomplishing all lining cutting of horseshoe-shaped mine hole, can directly carry out the rapid Assembly in the horseshoe tunnel, need not the scene and ties up, it is high-efficient convenient.
Description
Technical Field
The utility model relates to a tunnel cast in situ concrete lining's technical field, concretely relates to assembled reinforcing bar pipe piece that is used for the quick lining cutting of shape of a hoof tunnel.
Background
The horseshoe tunnel is a common type in a hydraulic tunnel, the construction speed of the horseshoe tunnel lining has great influence on the progress and safety of the project, and the construction speed of the lining is limited by binding of reinforcing steel bar pipe pieces (reinforcing steel bar net blocks) in the tunnel. At present, the binding and welding of the reinforcing mesh blocks of the tunnel lining are mostly carried out in the tunnel, and the binding and welding efficiency of the reinforcing mesh blocks is very low under the influence of space and illumination. In addition, dust and smoke generated in the process of binding and welding a large number of steel bars are difficult to dissipate in the holes, and the health of field workers is seriously endangered.
Chinese utility model patent CN201210286548.8 discloses a large-span tunnel arch secondary lining steel bar ligature construction method based on skeleton roof beam, and the secondary lining steel bar of ligature tunnel arch includes outer reinforcing bar net, inlayer reinforcing bar net and connects the vertical splice bar of outer reinforcing bar net and inlayer reinforcing bar net, and this construction method is as follows: firstly, mounting a framework beam: a plurality of framework beams are arranged below the primary supporting structure of the tunnel arch part from front to back; the framework beams are arched beams with the same radius as the outer layer reinforcing mesh, and a plurality of framework beams form a bearing structure of secondary lining reinforcing steel bars of the tunnel arch part; secondly, binding the secondary lining reinforcing steel bars of the tunnel arch part, wherein the binding process is as follows: the outer layer of reinforcing mesh is bound on the upper parts of the plurality of framework beams, and then the inner layer of reinforcing mesh is suspended on the outer layer of reinforcing mesh through the vertical connecting ribs. Although the utility model discloses a can realize the quick ligature of lining cutting reinforcing bar in tunnel, still need carry out interim equipment in the tunnel, do not have the practicality to small-size shape of a hoof tunnel, various dust and smog that the work progress produced can cause environment and health problem moreover.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an assembled reinforcing bar pipe piece and assembly method for the quick lining cutting of shape of a hoof tunnel, can directly carry out rapid Assembly in shape of a hoof tunnel, need not the scene and tie up, it is high-efficient convenient.
In order to achieve the above object, the utility model provides a following technical scheme:
the assembled reinforcing steel bar pipe sheet method for quickly lining the horseshoe-shaped tunnel comprises a top-sealing reinforcing steel bar net block and at least one pair of side wall reinforcing steel bar net blocks, wherein each pair of side wall reinforcing steel bar net blocks are respectively arranged at two ends of the top-sealing reinforcing steel bar net block and form a horseshoe shape with the top-sealing reinforcing steel bar net block;
the capping steel bar net block comprises a plurality of first circumferential steel bars and a plurality of first structural steel bars which are bound together, the first circumferential steel bars are sequentially arranged in parallel along the axis of the hole, the first structural steel bars are sequentially arranged in parallel along the radial direction of the hole, and the first structural steel bars and the first circumferential steel bars are kept vertical;
the first circumferential steel bars are arranged along the cross section of the tunnel, and the shape of the first circumferential steel bars is consistent with the radian of the top of the horseshoe-shaped tunnel; the first annular steel bar extends outwards along two ends of the cross section of the hole to form anchoring parts a for connecting and anchoring the top-sealing steel bar net block and the side wall steel bar net block; anchoring and connecting first circumferential steel bars between adjacent lining units;
the single first construction steel bar is arranged along the axial direction of the hole, the first construction steel bar is U-shaped, the long side of each U-shaped steel bar is fixed on the first circumferential steel bar, and the open end of the first construction steel bar is bent inwards and extends out of an anchoring part c for anchoring the first construction steel bar in the adjacent lining unit;
the side wall steel bar net block comprises a plurality of second circumferential steel bars and a plurality of second structural steel bars which are bound together, the second circumferential steel bars are sequentially arranged in parallel along the axis of the hole, the second structural steel bars are sequentially arranged in parallel along the radial direction of the hole, and the second structural steel bars and the second circumferential steel bars are kept vertical;
the second circumferential reinforcing steel bars are arranged along the cross section of the tunnel, and the shape of the second circumferential reinforcing steel bars is consistent with the radian of the side surface of the horseshoe-shaped tunnel; the second circumferential steel bar extends outwards along the upper end of the section of the hole to form an anchoring part d for connecting and anchoring the side wall steel bar net block and the capping steel bar net block/the adjacent side wall steel bar net block; an anchoring part e extends outwards from the second circumferential steel bar along the lower end of the section of the hole, and the anchoring part e is used for anchoring the side wall steel bar net block and the adjacent side wall steel bar net block/concrete bottom plate; anchoring second circumferential reinforcing steel bars in the adjacent lining units;
the single second structure reinforcing bar sets up along hole axial plane direction, the second structure reinforcing bar is "U" type and the long limit of every U type all is fixed in the second on the annular reinforcing bar, the open end of second structure reinforcing bar inwards buckles and extends out anchor portion g, realizes the anchor of second structure reinforcing bar in the adjacent lining cutting unit.
Description of the drawings: the reinforcing steel bar segment can be directly and quickly assembled in the tunnel without being tied up on site, and is efficient and convenient; realize between the muscle section of jurisdiction, muscle section of jurisdiction and concrete bottom plate, the muscle section of jurisdiction of different lining cutting units through the anchor, can fully reach the intensity of anchor, exert the effect of muscle section of jurisdiction. In order to ensure the structural strength of the capping steel bar duct piece and the side wall steel bar duct piece, the capping steel bar duct piece and the side wall steel bar duct piece can be fixed in a mechanical connection (sleeve) mode and a welding fixing mode.
Preferably, there is at least one lining element in which:
a plurality of fasteners protruding inwards are arranged on the anchoring part a of the first circumferential steel bar, and a plurality of corresponding fastening holes are arranged in the corresponding area of the second circumferential steel bar and the anchoring part a;
for the side wall reinforcing steel bar net block directly adjacent to the capping reinforcing steel bar net block, a plurality of fasteners protruding outwards are arranged on the anchoring part d on the second circumferential reinforcing steel bar, and a plurality of corresponding fastening holes are arranged in the corresponding area of the first circumferential reinforcing steel bar and the anchoring part d.
Description of the drawings: for lining units at certain positions, the lining units need to bear larger stress, in order to avoid the cracking of the top-sealing steel bar net block and the side wall steel bar net block, a fastening piece and a fastening hole are added to realize mechanical locking on the basis of welding and fixing, and the fastening piece and the fastening hole are integrally formed when the steel bar net blocks are bundled, so that the lining unit is convenient to use.
The fastening piece comprises a pin shaft head and a shaft body which are arranged on the fixed plane, and a through shaft hole is formed in the part, close to the lower end, of the shaft body; the whole fastening hole is T-shaped, a moving plate is arranged at the bottom of the vertical section of the fastening hole, transmission parts are fixedly arranged at two ends of the top of the moving plate, a stop block lower than the transmission parts is arranged in the middle of the moving plate, and the bottom of the moving plate is connected with the bottom of the fastening hole through a spring; the transmission part is a gear-rack pair, the circle center of the gear is fixed at a fixed point on the corresponding side wall, the inner end face of the gear is vertically provided with a sleeve, a fixed shaft is sleeved inside the sleeve through threads, the fixed shaft can be screwed in or out relative to the sleeve, and when the fastening part is located at the lowest end of the fastening hole, the fixed shaft can enter the shaft hole to lock the fastening part and the fastening hole.
It is shown that the fastener and the fastening hole can realize insertion-self locking, can realize locking by applying thrust in the hoisting process, does not need additional manual steps, is simple and efficient,
preferably, when the height of the horseshoe-shaped tunnel is not more than 5m, the number of the side wall steel bar net blocks is 1 pair.
The method has the advantage that the steel bar net blocks on the side wall do not need to be disassembled again for the horseshoe tunnel lower than 5 m.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the assembled duct pieces can be bundled and produced outside the holes, and are directly assembled in the holes after being transported without being bundled on site;
(2) the assembled duct piece is provided with a plurality of anchoring parts, so that the anchoring strength and the standard bearing capacity can be realized again;
(3) in the connection of the top-sealing steel bar net block and the side wall steel bar net block, the connecting part is generally positioned at a place with larger stress and is a main cracking end and a fragile end, so that a locking part is added at the connecting part of the top-sealing steel bar net block and the side wall steel bar net block for mechanical locking, and the annular bearing force and the longitudinal bearing force are increased;
(4) the locking part adopts the fastening part and the fastening hole, so that automatic locking can be realized by adding only one axial thrust in the hoisting process of the hoisting machine, and manual operation is not needed;
(5) the device has practicability for large, medium and small U-shaped tunnels, and large instruments are not required to be used for bundling and welding on site.
(6) The rapid lining of different lining units can be rapidly realized by utilizing the assembling pipe pieces, so that the rapid lining of the whole horseshoe-shaped tunnel is realized.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic diagram (one) of the splicing process of embodiment 1 of the present invention;
fig. 3 is a schematic splicing diagram (ii) of embodiment 1 of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 6 is a schematic structural view of embodiment 2 of the present invention;
fig. 7 is a schematic structural view of a fastener and a fastening hole in embodiment 2 of the present invention;
fig. 8 is a schematic view of the fastening member and fastening hole of the present invention in a locked state;
FIG. 9 is a schematic view of the structure of the transmission member in the fastening hole of the present invention;
fig. 10 is a schematic structural view of embodiment 3 of the present invention;
in the figure, 1-capping reinforcing steel bar net block, 11-first circumferential reinforcing steel bar, 111-anchoring part a, 12-first constructional reinforcing steel bar, 121-anchoring part c, 2-side wall reinforcing steel bar net block, 21-second circumferential reinforcing steel bar, 211-anchoring part d, 212-anchoring part e, 22-second constructional reinforcing steel bar, 221-anchoring part g, 3-fastening piece, 31-pin shaft head, 32-pin shaft body, 33-shaft hole, 4-fastening hole, 41-moving plate, 42-transmission piece, 43-stop block, 44-sleeve and 45-fixed shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
in the embodiment, the height of the U-shaped tunnel is 3.5m, and the length of the U-shaped tunnel is 1 km;
referring to fig. 1-5, the fabricated reinforced pipe sheet for rapid lining of horseshoe-shaped tunnels comprises a capping reinforced net block 1 and a pair of side wall reinforced net blocks 2, wherein each pair of side wall reinforced net blocks 2 are respectively arranged at two ends of the capping reinforced net block 1 and form a horseshoe shape with the capping reinforced net block 1;
the capping reinforcing steel bar net block 1 comprises a plurality of first circumferential reinforcing steel bars 11 and a plurality of first structural reinforcing steel bars 12 which are bound together, the plurality of first circumferential reinforcing steel bars 11 are sequentially arranged in parallel along the axis of a hole, the plurality of first structural reinforcing steel bars 12 are sequentially arranged in parallel along the radial direction of the hole, and the first structural reinforcing steel bars 12 are perpendicular to the first circumferential reinforcing steel bars 11;
the first circumferential steel bars 11 are arranged along the cross section of the tunnel, and the shape of the first circumferential steel bars 11 is consistent with the radian of the top of the horseshoe-shaped tunnel; the first annular steel bar 11 is provided with anchoring parts a111 extending along two ends of the cross section of the hole, and the anchoring parts a are used for connecting and anchoring the top-sealing steel bar net block 1 and the side wall steel bar net block 2; first circumferential steel bars 11 between adjacent lining units are connected in an anchoring mode;
the single first constructional steel bar 12 is arranged along the axial direction of the hole, the first constructional steel bar 12 is U-shaped, the long side of each U-shaped is fixed on the first circumferential steel bar 11, the open end of the first constructional steel bar 12 is bent inwards and extends out of an anchoring part c121 for anchoring the first constructional steel bar 12 in the adjacent lining unit;
the side wall reinforcing steel bar net block 2 comprises a plurality of second circumferential reinforcing steel bars 21 and a plurality of second structural reinforcing steel bars 22 which are bound together, the plurality of second circumferential reinforcing steel bars 21 are sequentially arranged in parallel along the axis of a hole, the plurality of second structural reinforcing steel bars 22 are sequentially arranged in parallel along the radial direction of the hole, and the second structural reinforcing steel bars 22 and the second circumferential reinforcing steel bars 21 are kept vertical;
the second circumferential steel bars 21 are arranged along the cross section of the tunnel, and the shape of the second circumferential steel bars 21 is consistent with the radian of the side surface of the horseshoe-shaped tunnel; an anchoring part d211 extends outwards from the second circumferential steel bar 21 along the upper end of the hole section and is used for connecting and anchoring the side wall steel bar net block 2 and the capping steel bar net block 1/the adjacent side wall steel bar net block 2; an anchoring part e212 extends outwards from the second circumferential steel bar 21 along the lower end of the hole section, and the anchoring part e212 is used for anchoring the side wall steel bar net block 2 and the adjacent side wall steel bar net block 2/concrete bottom plate; the second circumferential reinforcing steel bars 21 in the adjacent lining units are anchored;
the single second constructional steel bar 22 is arranged along the axial plane direction of the hole, the second constructional steel bar 22 is U-shaped, the long edge of each U-shaped is fixed on the second circumferential steel bar 21, the opening end of the second constructional steel bar 22 is bent inwards and extends out of the anchoring part g221, and anchoring of the second constructional steel bar 22 in the adjacent lining units is realized.
Referring to fig. 2 to 3, the assembling method using the segment includes the following steps:
s1: dividing the horseshoe-shaped tunnel lining into different tunnel lining units along the axial direction of the tunnel, wherein the length of each tunnel lining unit is 2 m;
s2: determining the shapes of a capping reinforcing steel bar net block 1 and a side wall reinforcing steel bar net block 2, avoiding the joint from being in a state of large stress, and binding reinforcing steel bars in a reinforcing steel bar processing factory outside a tunnel, wherein the binding process needs to consider the deformation error range in the transportation and installation processes;
s3: in any lining unit, firstly connecting the side wall reinforcing steel bar net blocks 2 of each pair with the insertion bars reserved on the reinforced concrete bottom plate through the anchoring parts f, and then hoisting the capping reinforcing steel bar net blocks 1 to the two side wall reinforcing steel bar net blocks 2 by using a hoisting machine for assembling; after assembly, the components are fixed again by welding to ensure the structural strength;
s4: sequentially installing side wall steel bar net blocks 2 and top sealing steel bar net blocks 1 in adjacent lining units according to the sequence of S3, reserving a pore smaller than 200mm at the joint surface between the steel bar net blocks in different lining units for installation, and anchoring the steel bar net blocks in the adjacent lining units;
s5: after the lining of a certain area is fixed, erecting a template, plugging and pouring concrete, wherein if no other poured lining units are arranged around the lining unit, two-side plugging is needed; if the adjacent side of the lining unit is the poured lining unit, blocking the lining unit at one side;
s6: and repeating the steps S3-S5 until the whole lining of the whole horseshoe tunnel is completed.
Description of the drawings: the reinforcing steel bar segment can be directly and quickly assembled in the tunnel without being tied up on site, and is efficient and convenient; simultaneously the design of multiple anchor portion realizes between the section of jurisdiction of reinforcing bar, the section of jurisdiction of reinforcing bar and concrete bottom plate, the fixed of the section of jurisdiction of reinforcing bar of different lining cutting units, can fully reach the intensity of anchor, the effect of performance section of reinforcing bar.
Example 2:
referring to fig. 6-9, in the present embodiment, the height of the horseshoe tunnel is 3.5m, and the length is 1 km;
the assembly type steel bar pipe sheet for the rapid lining of the horseshoe-shaped tunnel comprises a capping steel bar net block 1 and a pair of side wall steel bar net blocks 2, wherein each pair of side wall steel bar net blocks 2 are respectively arranged at two ends of the capping steel bar net block 1 and form a horseshoe shape with the capping steel bar net block 1;
the capping reinforcing steel bar net block 1 comprises a plurality of first circumferential reinforcing steel bars 11 and a plurality of first structural reinforcing steel bars 12 which are bound together, the plurality of first circumferential reinforcing steel bars 11 are sequentially arranged in parallel along the axis of a hole, the plurality of first structural reinforcing steel bars 12 are sequentially arranged in parallel along the radial direction of the hole, and the first structural reinforcing steel bars 12 are perpendicular to the first circumferential reinforcing steel bars 11;
the first circumferential steel bars 11 are arranged along the cross section of the tunnel, and the shape of the first circumferential steel bars 11 is consistent with the radian of the top of the horseshoe-shaped tunnel; the first annular steel bar 11 is provided with anchoring parts a111 extending along two ends of the cross section of the hole, and the anchoring parts a are used for connecting and anchoring the top-sealing steel bar net block 1 and the side wall steel bar net block 2; first circumferential steel bars 11 between adjacent lining units are connected in an anchoring mode;
the single first constructional steel bar 12 is arranged along the axial direction of the hole, the first constructional steel bar 12 is U-shaped, the long side of each U-shaped is fixed on the first circumferential steel bar 11, the open end of the first constructional steel bar 12 is bent inwards and extends out of an anchoring part c121 for anchoring the first constructional steel bar 12 in the adjacent lining unit;
the side wall reinforcing steel bar net block 2 comprises a plurality of second circumferential reinforcing steel bars 21 and a plurality of second structural reinforcing steel bars 22 which are bound together, the plurality of second circumferential reinforcing steel bars 21 are sequentially arranged in parallel along the axis of a hole, the plurality of second structural reinforcing steel bars 22 are sequentially arranged in parallel along the radial direction of the hole, and the second structural reinforcing steel bars 22 and the second circumferential reinforcing steel bars 21 are kept vertical;
the second circumferential steel bars 21 are arranged along the cross section of the tunnel, and the shape of the second circumferential steel bars 21 is consistent with the radian of the side surface of the horseshoe-shaped tunnel; an anchoring part d211 extends outwards from the second circumferential steel bar 21 along the upper end of the hole section and is used for connecting and anchoring the side wall steel bar net block 2 and the capping steel bar net block 1/the adjacent side wall steel bar net block 2; an anchoring part e212 extends outwards from the second circumferential steel bar 21 along the lower end of the hole section, and the anchoring part e212 is used for anchoring the side wall steel bar net block 2 and the adjacent side wall steel bar net block 2/concrete bottom plate; the second circumferential reinforcing steel bars 21 in the adjacent lining units are anchored;
the single second constructional steel bar 22 is arranged along the axial plane direction of the hole, the second constructional steel bar 22 is U-shaped, the long edge of each U-shaped is fixed on the second circumferential steel bar 21, the opening end of the second constructional steel bar 22 is bent inwards and extends out of the anchoring part g221, and anchoring of the second constructional steel bar 22 in the adjacent lining units is realized.
For two adjacent lining units, the first circumferential reinforcing steel bar 11 and the second circumferential reinforcing steel bar 12 in one lining unit have the following structures:
a plurality of fasteners 3 protruding inwards are arranged on the anchoring part a111 of the first circumferential reinforcing steel bar 11, and a plurality of corresponding fastening holes 4 are arranged in the corresponding area of the second circumferential reinforcing steel bar 21 and the anchoring part a 111;
for the side wall reinforcing steel bar net block 2 directly adjacent to the capping reinforcing steel bar net block 1, a plurality of fasteners 3 protruding outwards are arranged on the anchoring part d211 on the second circumferential reinforcing steel bar 21, and a plurality of corresponding fastening holes 4 are arranged in the corresponding area of the first circumferential reinforcing steel bar 11 and the anchoring part d 211;
the fastening piece 3 comprises a pin head 31 and a shaft body 32 which are arranged on a fixed plane, and a through shaft hole 33 is arranged at the part of the shaft body 32 close to the lower end; the whole fastening hole 4 is T-shaped, a moving plate 41 is arranged at the bottom of the vertical section of the fastening hole, transmission pieces 42 are fixedly arranged at two ends of the top of the moving plate 41, a stop block 43 lower than the transmission pieces 42 is arranged in the middle of the moving plate 41, and the bottom of the moving plate 41 is connected with the bottom of the fastening hole 4 through a spring; the transmission member 42 is a rack and pinion, the center of a circle of the gear is fixed at a certain point on the corresponding side wall, the inner end surface of the gear is vertically provided with a sleeve 44, a fixed shaft 45 is sleeved inside the sleeve 44 through a thread, the fixed shaft 45 can be screwed in or out relative to the sleeve 44, and when the fastener 3 is located at the lowest end of the fastening hole 4, the fixed shaft 45 can enter the shaft hole 33 so as to lock the fastener 3 and the fastening hole 4.
The assembling method using the segment comprises the following steps:
s1: dividing the horseshoe-shaped tunnel lining into different tunnel lining units along the axial direction of the tunnel, wherein the length of each tunnel lining unit is 2 m;
s2: determining the shapes of a capping reinforcing steel bar net block 1 and a side wall reinforcing steel bar net block 2, avoiding the joint from being in a state of large stress, and binding reinforcing steel bars in a reinforcing steel bar processing factory outside a tunnel, wherein the binding process needs to consider the deformation error range in the transportation and installation processes;
s3: in any lining unit, firstly connecting the side wall reinforcing steel bar net blocks 2 of each pair with the insertion bars reserved on the reinforced concrete bottom plate through the anchoring parts f, and then hoisting the capping reinforcing steel bar net blocks 1 to the two side wall reinforcing steel bar net blocks 2 by using a hoisting machine for assembling; in the installation process of the lining unit provided with the locking piece 3/the locking hole 4, after the capping steel bar net block 1 is hoisted to the position between the two side wall steel bar net blocks 2 by utilizing a hoisting machine, a thrust is applied to ensure that the fastening piece 3 on the anchoring part a111 is inserted into the fastening hole 4 on the second circumferential steel bar 211, and meanwhile, the fastening piece 3 on the anchoring part d211 is inserted into the fastening hole 4 on the first circumferential steel bar 111, so that the side wall steel bar net block 2 and the capping steel bar net block 1 are locked; then fixing again by welding;
s4: sequentially installing side wall steel bar net blocks 2 and top sealing steel bar net blocks 1 in adjacent lining units according to the sequence of S3, reserving a pore with the size smaller than 200mm at the joint surface between the steel bar net blocks in different lining units for installation, and anchoring the steel bar net blocks in the adjacent lining units;
s5: after the lining of a certain area is fixed, erecting a template, plugging and pouring concrete, wherein if no other poured lining units are arranged around the lining unit, two-side plugging is needed; if the adjacent side of the lining unit is the poured lining unit, blocking the lining unit at one side;
s6: and repeating the steps S3-S5 until the whole lining of the whole horseshoe tunnel is completed.
Description of the drawings: compared with the embodiment 1, the embodiment adds mechanical fixing force to the capping steel bar net block 1 and the side wall steel bar net block 2 in the partial lining unit so as to increase the bearing force.
Example 3:
referring to fig. 10, in the present embodiment, the height of the horseshoe tunnel is 7.2m, and the length is 5 km;
the difference between the embodiment 3 and the embodiment 1 is that the side wall rebar grid blocks 2 are arranged in two pairs; the rest of the structure is the same as that of the embodiment 1; in the process of rapid lining, for each lining unit, the second pair of side wall steel reinforcement mesh blocks 2 need to be installed on the reinforced concrete bottom plate, then the first pair of side wall steel reinforcement mesh blocks 2 are installed on the second pair of side wall steel reinforcement mesh blocks 2, then the top-sealing steel reinforcement mesh blocks 1 are installed, and the rest steps are the same as those of embodiment 1.
Claims (3)
1. A assembled reinforcing bar section of jurisdiction for the quick lining of horseshoe tunnel, its characterized in that: the steel bar net structure comprises a capping steel bar net block (1) and at least one pair of side wall steel bar net blocks (2), wherein each pair of side wall steel bar net blocks (2) are respectively arranged at two ends of the capping steel bar net block (1) and form a horseshoe shape with the capping steel bar net block (1);
the capping steel bar net block (1) comprises a plurality of first circumferential steel bars (11) and a plurality of first structural steel bars (12) which are bound together, the first circumferential steel bars (11) are sequentially arranged in parallel along the axis of a hole, the first structural steel bars (12) are sequentially arranged in parallel along the radial direction of the hole, and the first structural steel bars (12) and the first circumferential steel bars (11) are kept vertical;
the first circumferential steel bars (11) are arranged along the cross section of the tunnel, and the shape of the first circumferential steel bars (11) is consistent with the radian of the top of the horseshoe-shaped tunnel; the first annular steel bar (11) extends outwards along two ends of the cross section of the hole to form anchoring parts a (111) for connecting and anchoring the capping steel bar net block (1) and the side wall steel bar net block (2); first circumferential steel bars (11) between adjacent lining units are connected in an anchoring mode;
the single first construction steel bar (12) is arranged along the axial direction of the hole, the first construction steel bar (12) is U-shaped, the long side of each U-shaped is fixed on a first circumferential steel bar (11), the open end of the first construction steel bar (12) is bent inwards and extends out of an anchoring part c (121) for anchoring the first construction steel bar (12) in the adjacent lining unit;
the side wall steel bar net block (2) comprises a plurality of second circumferential steel bars (21) and a plurality of second structural steel bars (22) which are bound together, the second circumferential steel bars (21) are sequentially arranged in parallel along the axis of a hole, the second structural steel bars (22) are sequentially arranged in parallel along the radial direction of the hole, and the second structural steel bars (22) and the second circumferential steel bars (21) are kept vertical;
the second circumferential steel bars (21) are arranged along the cross section of the tunnel, and the shape of the second circumferential steel bars (21) is consistent with the radian of the side surface of the horseshoe-shaped tunnel; an anchoring part d (211) extends outwards from the second circumferential steel bar (21) along the upper end of the section of the hole and is used for connecting and anchoring the side wall steel bar net block (2) and the capping steel bar net block (1) or the adjacent side wall steel bar net blocks (2); an anchoring part e (212) extends outwards from the second circumferential steel bar (21) along the lower end of the section of the hole, and the anchoring part e (212) is used for anchoring the side wall steel bar net block (2) and the adjacent side wall steel bar net block (2)/concrete bottom plate; second circumferential reinforcing steel bars (21) in the adjacent lining units are anchored;
the single second construction steel bar (22) is arranged along the axial plane direction of the hole, the second construction steel bar (22) is U-shaped, the long edge of each U-shaped steel bar is fixed on the second circumferential steel bar (21), the opening end of the second construction steel bar (22) is bent inwards, and an anchoring part g (221) extends outwards, so that the anchoring of the second construction steel bar (22) in the adjacent lining units is realized.
2. The fabricated rebar tube sheet of claim 1, wherein: at least one lining element is present, in which element:
a plurality of fasteners (3) protruding inwards are arranged on the anchoring part a (111) of the first circumferential reinforcing steel bar (11), and a plurality of corresponding fastening holes (4) are arranged in the corresponding area of the second circumferential reinforcing steel bar (21) and the anchoring part a (111);
for the side wall reinforcing steel bar net block (2) directly adjacent to the capping reinforcing steel bar net block (1), a plurality of fasteners (3) protruding outwards are arranged on the anchoring part d (211) on the second circumferential reinforcing steel bar (21), and a plurality of corresponding fastening holes (4) are arranged in the corresponding area of the first circumferential reinforcing steel bar (11) and the anchoring part d (211).
3. The fabricated rebar tube sheet of claim 2, wherein: the fastening piece (3) comprises a pin head (31) and a shaft body (32) which are arranged on a fixed plane, and a through shaft hole (33) is formed in the part, close to the lower end, of the shaft body (32); the fastening hole (4) is integrally T-shaped, a moving plate (41) is arranged at the bottom of the vertical section of the fastening hole, transmission pieces (42) are fixedly arranged at two ends of the top of the moving plate (41), a stop block (43) lower than the transmission pieces (42) is arranged in the middle of the moving plate (41), and the bottom of the moving plate (41) is connected with the bottom of the fastening hole (4) through a spring; the transmission part (42) is a gear-rack pair, the circle center of the gear is fixed at a certain point on the corresponding side wall, the inner end face of the gear is vertically provided with a sleeve (44), a fixed shaft (45) is sleeved inside the sleeve (44) through a thread, the fixed shaft (45) can be screwed in or out relative to the sleeve (44), and when the fastening part (3) is located at the lowest end of the fastening hole (4), the fixed shaft (45) can enter the shaft hole (33) to lock the fastening part (3) and the fastening hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921924670.7U CN211228414U (en) | 2019-11-09 | 2019-11-09 | Assembled reinforcing steel bar pipe sheet for rapid lining of U-shaped tunnel |
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| CN201921924670.7U CN211228414U (en) | 2019-11-09 | 2019-11-09 | Assembled reinforcing steel bar pipe sheet for rapid lining of U-shaped tunnel |
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