CN211340848U - Underground structure falls board construction system among reverse construction method - Google Patents
Underground structure falls board construction system among reverse construction method Download PDFInfo
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- CN211340848U CN211340848U CN201921369669.2U CN201921369669U CN211340848U CN 211340848 U CN211340848 U CN 211340848U CN 201921369669 U CN201921369669 U CN 201921369669U CN 211340848 U CN211340848 U CN 211340848U
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Abstract
The utility model discloses an underground structure falls board construction system among reverse construction method, including crane rack, a plurality of loop wheel machines, support bracket, laser range finder and mark target temporarily. The lifting frame comprises a plurality of vertical supporting rods and transverse supporting rods, the vertical supporting rods are respectively arranged on the upright post piles and the underground continuous wall, the transverse supporting rods are horizontally arranged, and two ends of each transverse supporting rod are respectively fixed on the vertical supporting rods; the crane is arranged on the crane frame; the temporary support bracket is positioned in a groove on the underground continuous wall; and a plurality of pairs of targets and laser range finders are correspondingly arranged on the two layers of precast beam plates which are adjacent up and down respectively. The construction system is suitable for hoisting the precast beam slab by a reverse-construction slab lowering method, monitors whether the precast beam slab inclines or not, controls a servo mechanism of a crane through a control terminal, adjusts the lowering rate of the crane, and ensures that the precast beam slab stably descends, so that the hoisting safety and the installation precision of the precast beam slab are ensured, and the quick and high-precision hoisting construction of the precast beam slab is realized.
Description
Technical Field
The utility model relates to an underground structure falls board construction system among reverse construction method belongs to construction technical field.
Background
At present, the underground structure is constructed by adopting a reverse construction method, namely the underground structure is constructed layer by layer from top to bottom, and the floor slab and the beam of the underground structure adopt a cast-in-place construction mode, so that the construction method has the following defects:
1. the interior of a construction site is closed and narrow, so that the construction of a cast-in-place structure is difficult to ensure because of the difficulties of inconvenient erection of a template bracket, difficult erection of a template and the like; moreover, the tail gas emission of mechanical equipment in a narrow space is concentrated, and the dissipation speed of toxic gas is low, so that the safety of constructors is directly threatened;
2. the construction of a template support of a cast-in-place structure needs to consume a large amount of steel and wood, except for a B0 plate, templates, reinforcing steel bars, scaffolds and the like required by the construction of each layer of beam-slab structure need to be transported through a reserved narrow soil taking opening, so that the working efficiency is low, and the material can not be damaged and consumed in the transportation process;
3. after concrete pouring of the underground structure is completed, the strength can be formed after curing for a period of time, and because the underground beam slab structure in the reverse construction method is also used as a temporary horizontal support when being used as a permanent structure beam slab, construction of each floor needs to be performed after curing to the designed strength, construction of the next step can be performed, the concrete curing time occupies a large period, and the construction efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of underground structure falls board construction system in reverse construction method is applicable to and adopts the reverse construction to fall the prefabricated beam slab hoist and mount construction of board method to underground structure. By adopting the construction system, whether the precast beam plate inclines or not can be monitored, and the precast beam plate is ensured to stably descend, so that the hoisting safety and the installation precision of the precast beam plate are ensured, and the quick and high-precision hoisting construction of the precast beam plate is realized.
For solving the technical problem, the utility model discloses a following technical scheme:
a plate lowering construction system of an underground structure in a reverse construction method is disclosed, wherein the underground structure is provided with an underground enclosure structure formed by enclosing underground continuous walls, and a plurality of upright piles are arranged in a construction area of the underground structure; the plate lowering construction system is used for constructing precast beam plates, each precast beam plate comprises a plurality of ring beams, horizontal cross beams and floor plates, the ring beams, the horizontal cross beams and the floor plates form an integral structure, the ring beams are matched with the upright posts, the horizontal cross beams are used for connecting adjacent ring beams, peripheral ring beams and the underground continuous wall, and the floor plates are fixedly connected with the horizontal cross beams; the underground structure falls board construction system includes:
the lifting frame comprises a plurality of vertical supporting rods and transverse supporting rods, the vertical supporting rods are respectively arranged on the upright post piles and the underground continuous wall, the transverse supporting rods are horizontally arranged, and two ends of each transverse supporting rod are respectively fixed on the vertical supporting rods;
the plurality of cranes are arranged on the crane frame, every two cranes form a group, and the positions of the cranes correspond to the positions of the precast beam slabs of the underground structure;
the underground continuous wall is provided with a plurality of grooves along the height direction, and the temporary support bracket is positioned in the grooves;
the laser range finder and the target are arranged on the upper layer of precast beam plate and the lower layer of precast beam plate which are adjacent to each other, and a plurality of pairs of the target and the laser range finder are correspondingly arranged on the two layers of precast beam plates.
Further, the top elevation of the temporary support bracket below the precast beam slab at the top of the ith layer of the underground structure is HLiWherein, in the step (A),
HLi＝HYi-B (N + 1-i); wherein i is 1, 2, …, N;
HYithe elevation of the top of the i-th layer of precast beam slab;
and B is the height of the precast beam slab.
Furthermore, N-1 corresponding grooves are formed in the inner side of each underground continuous wall along the height direction of the underground continuous wall, and one groove is formed below a connecting node between the precast beam slab from the underground layer to the underground N-1 layer and the underground continuous wall.
The control terminal is used for collecting readings of the laser range finders and calculating mean values, and is further used for judging whether the readings of the laser range finders exceed the mean values one by one, controlling a servo mechanism of the crane and adjusting the descending speed of the crane.
The underground structure falls board construction system in reverse construction method that this embodiment provided hoists the precast beam board through crane frame and loop wheel machine to on shelving the precast beam board in interim support bracket, through laser range finder and mark target, be used for monitoring the precast beam board whether slope, through the servo of control terminal control loop wheel machine, the rate of descent of adjustment loop wheel machine, thereby guarantee the steady decline of precast beam board. By adopting the construction system, whether the precast beam slab inclines or not can be judged, so that the hoisting safety and the installation precision of the precast beam slab are ensured, and the quick and high-precision hoisting construction of the precast beam slab is realized. By adopting the construction system, the plate lowering construction is carried out on the precast beam plate, the construction is simple and convenient, and the construction is more efficient, stable and safe, and the construction quality is ensured.
Drawings
FIG. 1 is a schematic view illustrating construction of a guide groove and an underground diaphragm wall;
FIG. 2 is a schematic diagram of the construction of a stud pile;
FIG. 3 is a schematic view of the installation of a crane frame and the construction of a top precast beam slab of an underground floor;
FIG. 4 is a bottom view of the precast beam slab;
FIG. 5 is a top view of a precast beam slab;
FIG. 6 is a partially enlarged view of a connection node of a precast beam slab and a stud pile;
fig. 7-10 are schematic diagrams of construction of top precast beam slabs from two underground layers to five underground layers respectively.
The numbers in the figures are as follows:
10-underground diaphragm wall; 11-a first groove; 12-a second groove; 13-a third groove; 14-a fourth groove; 15-temporary support of the corbel;
20-vertical column pile; 21-shear studs;
30-a crane frame; 31-a transverse strut; 32-vertical struts; 33-a crane;
40-prefabricating a beam plate; 41-ring beam; 42-horizontal beam; 43-a dowel bar; 44-floor plates; 45-laser rangefinder; 46-a target;
50-large bottom plate;
60-superstructure.
Detailed Description
The present invention provides a system for lowering slab of underground structure in reverse construction method, which is described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent in conjunction with the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Example one
The embodiment provides an underground structure plate lowering construction system in a reverse construction method, and as shown in fig. 3 to 5, the underground structure is provided with an underground enclosure structure enclosed by underground continuous walls 10, and a plurality of upright posts 20 are arranged in an underground structure construction area; the plate lowering construction system is used for constructing a precast beam plate 40, the precast beam plate 40 comprises a plurality of ring beams 41, horizontal cross beams 42 and floor plates 43 which form an integral structure, the ring beams 41 are matched with the upright posts 20, the horizontal cross beams 42 are used for connecting the adjacent ring beams 41 and the peripheral ring beams 41 with the underground continuous wall 10, and the floor plates 43 are fixedly connected with the horizontal cross beams 42; the underground structure falls board construction system includes:
the crane frame 30 comprises a plurality of vertical supporting rods 31 and transverse supporting rods 32, the vertical supporting rods are respectively arranged on the upright posts 20 and the underground continuous wall 10, the transverse supporting rods 32 are horizontally arranged, and two ends of each transverse supporting rod are respectively fixed on the vertical supporting rods 31;
the plurality of cranes 33 are arranged on the crane frame, every two cranes form a group, and the positions of the cranes correspond to the position of the underground structure precast beam slab 40;
the temporary support bracket 15 is provided with a plurality of grooves along the height direction, and is positioned in the grooves;
the laser range finder 44 and the target 45 are respectively and correspondingly provided with a plurality of pairs of targets and laser range finders on the two layers of prefabricated beam plates which are adjacent from top to bottom.
The underground structure falls board construction system in reverse construction method that this embodiment provided hoists the precast beam board through crane frame and loop wheel machine to on shelving the precast beam board in interim support bracket, through laser range finder and mark target, be used for monitoring the precast beam board whether slope, through the servo of control terminal control loop wheel machine, the rate of descent of adjustment loop wheel machine, thereby guarantee the steady decline of precast beam board. By adopting the construction system, whether the precast beam slab inclines or not can be judged, so that the hoisting safety and the installation precision of the precast beam slab are ensured, and the quick and high-precision hoisting construction of the precast beam slab is realized.
Preferably, the top elevation of the temporary support bracket below the precast beam slab at the top of the ith floor of the underground structure is HLiWherein H isLi＝HYi-B (N + 1-i); wherein i is 1, 2, …, N; hYiThe elevation of the top of the i-th layer of precast beam slab; and B is the height of the precast beam slab. This embodiment can guarantee that the precast beam board of the top in the prefabricated beam board of coincide is in the design elevation all the time, reduces the degree of difficulty of hoist and mount.
The preferable embodiment is that the inner side of each underground continuous wall is provided with N-1 corresponding grooves along the height direction, and one groove is respectively arranged below the connecting node of the precast beam slab from the underground layer to the underground N-1 layer and the underground continuous wall.
The preferable embodiment is that the underground structure falls board construction system still includes control terminal, be provided with the deviation allowable value in the control terminal, control terminal is used for gathering the reading of laser range finder and calculating the mean value, still is used for judging whether the reading of laser range finder compares the deviation allowable value with the mean value one by one, and is used for controlling the servo of loop wheel machine, adjusts the descending speed of loop wheel machine.
Example two
Referring to fig. 1 to 10, a method for constructing a lowering plate of an underground structure in a reverse method according to this embodiment will be further described. Wherein, the underground structure has 5 layers, and the marks are respectively a first underground layer, a second underground layer, … and a fifth underground layer from top to bottom. The construction method comprises the following steps:
s1, as shown in figures 1 and 2, excavating a guide groove below the ground, and placing a prefabricated underground continuous wall 10 in the guide groove to form a building enclosure of a construction area; a plurality of grooves are formed in the inner side of each underground continuous wall 10 along the height direction of the underground continuous wall, and a plurality of upright piles 20 are driven into the underground structure construction area. For example, a groove is respectively arranged below the connection node of the precast beam slab 40 from the first floor to the second floor to the underground continuous wall 10, and the first groove 11, the second groove 12, the third groove 13 and the fourth groove 14 are arranged from top to bottom in sequence, that is, no groove is arranged below the connection node of the precast beam slab 40 from the fifth floor to the underground continuous wall 10. As shown in fig. 4, in the present embodiment, the underground continuous wall 10 has a rectangular structure, and three rows and three columns of 9 stud piles 20 are driven into the construction area.
S2, as shown in figure 3, a crane rack 30 is arranged on the upright post 20, a plurality of cranes 33 are arranged on the crane rack 30, every two cranes 33 form a group, and the positions of the cranes 33 correspond to the positions of the precast beam plates 40 of the underground structure. The crane frame 30 comprises a vertical supporting rod 32 and a horizontal supporting rod 31, wherein one vertical supporting rod 32 is arranged on each upright post 20, the vertical supporting rod 32 is correspondingly arranged on the ground continuous wall, the horizontal supporting rod 31 is horizontally arranged, and two ends of the horizontal supporting rod 31 are respectively fixed on the vertical supporting rods 32. By way of example, the hoist 33 may be an electric hoist or a hand hoist for hoisting the precast beam slab 40 of the underground structure. Referring to fig. 4, each of the 9 stud piles is provided with one vertical strut 32, each edge of the underground diaphragm wall 10 is correspondingly provided with 3 vertical struts 32, 21 vertical struts are provided, the horizontal struts 31 connect all the vertical struts into a whole, and each vertical strut 31 is provided with 2 cranes.
S3, as shown in FIG. 3 excavation soil layer to one layer of underground elevation in the underground construction area, every install temporary support bracket 15 on the first recess 11 of underground continuous wall 10, shelve in through loop wheel machine 33 with the precast beam board 40 that 5 coincide were placed temporary support bracket 15 is last, and 5 coincide are placed precast beam board 40 is first layer precast beam board 40, second floor precast beam board 40, …, fifth layer precast beam board 40 from top to bottom in proper order, and precast beam board includes the ring beam 41, horizontal beam 42 and the floor board 43 of a body structure, and the ring beam is corresponding with the stand pile, and horizontal beam is used for connecting adjacent ring beam and peripheral ring beam and underground continuous wall, floor board and horizontal beam fixed connection. As shown in fig. 4 to 6, each precast beam slab 40 includes 9 ring beams 41 and 24 horizontal beams 42, each ring beam 41 is connected with 4 horizontal beams 42, a horizontal beam 42 is disposed between adjacent ring beams 41, the peripheral ring beam 41 is fixedly connected with the underground continuous wall 10 through the horizontal beam 42 extending outwards, the ring beams 41 are respectively sleeved on the corresponding upright piles 20, and the connection nodes between the first precast beam slab 40 and the underground continuous wall 10 as well as the upright piles 20 are connected by post-cast concrete, thereby completing the construction of the top precast beam slab 40 of the underground structure. Wherein, the post-cast concrete is cast by ultra high performance concrete (UHPC for short), and has the advantages of high strength, fast strength rise, strong caking property and the like. As shown in fig. 4 and 5, a plurality of pairs of laser range finders 45 and a plurality of pairs of laser range finders 46 are respectively and correspondingly arranged on the two adjacent upper and lower layers of precast beam plates 40, that is, a plurality of pairs of targets and laser range finders are correspondingly arranged on the lower surface of the first layer of precast beam plate and on the upper surface of the second layer of precast beam plate, a plurality of pairs of targets and laser range finders are correspondingly arranged on the lower surface of the second layer of precast beam plate and on the upper surface of the third layer of precast beam plate, and the same is true for the rest layers of precast beam plates.
S4, as shown in figure 7, excavating a soil layer to an underground second-layer elevation in the underground structure construction area, installing temporary support brackets 15 on the second grooves 12 of the underground continuous walls 10, descending the remaining 4 prefabricated beam slabs 40 which are stacked through a crane 33 and placing the prefabricated beam slabs on the underground second-layer temporary support brackets 15, dismantling the temporary support brackets 15 at the first grooves 11, and connecting joints between the second-layer prefabricated beam slabs 40 and the underground continuous walls 10 and the upright posts 20 are connected through post-cast concrete to complete construction of the top prefabricated beam slabs of the underground second-layer of the underground structure; and in the process of descending the precast beam plate by adopting the crane, starting the laser range finders on the underground two-layer precast beam plate, always keeping the laser of the laser range finders irradiated on the targets corresponding to the lower surface of the underground one-layer precast beam plate, and controlling the descending speed of the crane to enable the reading of each laser range finder to tend to be consistent.
Because the prefabricated beam plate has larger size and comprises a plurality of ring beams sleeved on the upright posts and a plurality of horizontal cross beams connected with the underground continuous wall, if the descending speed of the crane is large or small, the ring beams and the upright posts and the horizontal cross beams and the underground continuous wall can collide, and the inclined prefabricated beam plate can increase the tension of some cranes, thereby generating potential safety hazards. Therefore, to ensure the descending rate of all the cranes and to stably descend the precast beam slab, for example, the measurement data of the laser range finders are transmitted to the control terminal in real time, and when the measurement value of a certain laser range finder is larger or smaller, the control terminal adjusts the servo mechanism of the crane and adjusts the descending rate of the crane, so that the readings of all the laser range finders tend to be consistent, and the precast beam slab stably descends. Furthermore, the control terminal can be used for calculating the average value of the laser distance measuring instruments, when the reading of one laser distance measuring instrument exceeds the deviation allowable value, the control terminal automatically controls the servo mechanism of the crane and adjusts the descending speed of the crane until the reading of the laser distance measuring instrument accords with the deviation allowable value.
And S5, as shown in the figures 8 to 10, repeating the step S4 to finish the construction of the three-to-five-layer top precast beam slab 40 under the underground structure, then dismantling the crane 33 and the crane frame 30, and pouring the large bottom plate 50 of the underground structure.
The utility model provides a construction method of underground structure in reverse construction method, firstly, prefabricate the precast beam slab 40 of all layers of underground structure once only, the precast beam slab 40 of each layer includes a plurality of ring beam 41, horizontal beam 42 and floor board 43 that link as an organic whole, all precast beam slabs 40 are stacked together by crane 33; when the precast beam slab 40 is constructed to the top of a certain layer of the underground structure, the precast beam slab 40 is lowered, the precast beam slab 40 is placed on the temporary support bracket 15, and the precast beam slab 40 on the uppermost layer is directly poured and fixed with the upright post pile 20 and the underground connecting wall; and after the next layer of underground soil is excavated, the rest precast beam plates 40 are subjected to beam descending operation, so that the construction of all the precast beam plates 40 of the underground structure is completed in sequence. Compared with the original top-down construction method of cast-in-place layer by layer, the utility model adopts the construction method of integrally prefabricating, integrally hoisting and sequentially lowering the beams for each layer of prefabricated beam plates 40 of the underground structure, thereby saving the maintenance time of the cast-in-place structure, greatly improving the construction efficiency, simultaneously avoiding the potential safety hazard due to the work of supporting the template, and saving a large amount of resources such as steel, wood and the like; and a plurality of pairs of laser range finders and targets are arranged on the upper and lower adjacent precast beam plates, whether the precast beam plate on the next layer stably descends or not can be judged through the reading of the laser range finders, and the precast beam plates can be adjusted in time when the precast beam plates are inclined, so that the construction safety of the precast beam plates is improved. Therefore, the utility model discloses a to fall roof beam method construction technology and prefabricated assembled construction technology with the contrary work and combine together, the construction is simple and convenient and more high-efficient, stable, safe, has ensured construction quality to form one set and can make things convenient for, quick, safe and high-quality ground and carry out the industrialization building construction system that reverse construction method was under construction.
Further, the top elevation of the temporary support bracket 15 on the ith floor of the underground structure is HLiWherein H isLi＝HYi-B (N + 1-i); wherein i is 1, 2, …, N; hYiThe elevation of the top of the i-th layer of precast beam slab 40; b is the height of the precast beam panel 40. That is to say that the distance between the elevation at first layer precast beam board 40 top and the top elevation of interim support bracket 15 equals the height of 5 precast beam boards 40, just makes first layer precast beam board 40 be located design elevation this moment, and on the same reason, a plurality of precast beam boards 40 of shelving on the interim support bracket 15 of other each layer, the precast beam board 40 of the superiors is located the design elevation on this layer all the time, can realize precast beam board 40's quick installation, improves the efficiency of construction. Of course, if the number of the grooves is N-1, the value i is 1, 2, …, N-1.
Further, as shown in fig. 6, the inner side of the ring beam 41 is provided with a dowel 43 along the radial direction, the joint of the upright post 20 and the ring beam 41 is provided with a shear stud 21, and the ring beam 41 and the upright post 20 are cast with ultra-high performance concrete. The connection effect between the ring beam 41 and the stud 20 can be improved by providing the stud bolts 21 and the studs 43. Furthermore, the two sides of the horizontal beam are provided with horizontal anchoring steel bars which extend into the floor plate, so that the integrity of the horizontal beam and the floor plate is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (4)
1. The underground structure plate lowering construction system in the reverse construction method is characterized in that an underground enclosure structure formed by enclosing underground continuous walls is arranged on the underground structure, and a plurality of upright piles are arranged in the construction area of the underground structure; the plate lowering construction system is used for constructing precast beam plates, each precast beam plate comprises a plurality of ring beams, horizontal cross beams and floor plates, the ring beams, the horizontal cross beams and the floor plates form an integral structure, the ring beams are matched with the upright posts, the horizontal cross beams are used for connecting adjacent ring beams, peripheral ring beams and the underground continuous wall, and the floor plates are fixedly connected with the horizontal cross beams; the underground structure falls board construction system includes:
the lifting frame comprises a plurality of vertical supporting rods and transverse supporting rods, the vertical supporting rods are respectively arranged on the upright post piles and the underground continuous wall, the transverse supporting rods are horizontally arranged, and two ends of each transverse supporting rod are respectively fixed on the vertical supporting rods;
the plurality of cranes are arranged on the crane frame, every two cranes form a group, and the positions of the cranes correspond to the positions of the precast beam slabs of the underground structure;
the underground continuous wall is provided with a plurality of grooves along the height direction, and the temporary support bracket is positioned in the grooves;
the laser range finder and the target are arranged on the upper layer of precast beam plate and the lower layer of precast beam plate which are adjacent to each other, and a plurality of pairs of the target and the laser range finder are correspondingly arranged on the two layers of precast beam plates.
2. The underground structure slab descending construction system in the reverse construction method according to claim 1, wherein the top elevation of the temporary support bracket below the precast beam slab at the top of the ith layer of the underground structure is HLiWherein, in the step (A),
HLi＝HYi-B (N + 1-i); wherein i is 1, 2, …, N;
HYithe elevation of the top of the i-th layer of precast beam slab;
and B is the height of the precast beam slab.
3. The underground structure slab lowering construction system in reverse construction according to claim 1,
and N-1 corresponding grooves are formed in the inner side of each underground continuous wall along the height direction of the underground continuous wall, and one groove is formed below a connecting node between the precast beam slab from the underground layer to the underground N-1 layer and the underground continuous wall.
4. The system for constructing the underground structure by lowering the slab in the reverse construction method according to claim 1, further comprising a control terminal, wherein the control terminal is provided with a deviation allowance value, and the control terminal is used for collecting the readings of the laser distance measuring instruments and calculating a mean value, and is further used for determining whether the readings of the laser distance measuring instruments exceed the deviation allowance value one by one compared with the mean value, and controlling a servo mechanism of the crane to adjust the lowering speed of the crane.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110792099A (en) * | 2019-08-22 | 2020-02-14 | 上海建工二建集团有限公司 | Plate lowering construction method for underground structure in reverse construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110792099A (en) * | 2019-08-22 | 2020-02-14 | 上海建工二建集团有限公司 | Plate lowering construction method for underground structure in reverse construction method |
| WO2021031859A1 (en) * | 2019-08-22 | 2021-02-25 | 上海建工二建集团有限公司 | Slab lowering construction method for underground structure in reverse construction method |
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