CN111173029A - Prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard and construction method thereof - Google Patents
Prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard and construction method thereof Download PDFInfo
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- CN111173029A CN111173029A CN202010028205.6A CN202010028205A CN111173029A CN 111173029 A CN111173029 A CN 111173029A CN 202010028205 A CN202010028205 A CN 202010028205A CN 111173029 A CN111173029 A CN 111173029A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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Abstract
The invention specifically relates to a prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard, which is characterized in that: the prefabricated slab comprises an outer prefabricated slab and an inner prefabricated slab, wherein the inner prefabricated slab and the outer prefabricated slab are connected through an erected truss; the outer precast slab and the inner precast slab are connected into a whole through L-shaped ribs; the outer precast slab and the inner precast slab of the standard precast section pipe gallery are staggered in the horizontal direction at two ends and are connected into a whole through L-shaped ribs; the outer precast slabs and the inner precast slabs are staggered in the horizontal direction of a non-transition end and are connected into a whole through L-shaped ribs, are parallel and level in the horizontal direction of the transition end and are connected through end plugging sections, and vertical water stop steel plates are arranged in the middle of the end plugging sections and are vertically connected with horizontal water stop steel plates at the bottoms of the prefabricated sandwich wallboards; the transition end is provided with an overhanging horizontal steel bar along the vertical direction for being connected with a cast-in-place section pipe gallery. The invention overcomes a series of design, construction and quality problems caused by different materials by improving the connecting node of the prefabricated sandwich wall panel.
Description
Technical Field
The invention particularly relates to a prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard and a construction method thereof, and particularly relates to a method for overcoming a series of design, construction and quality problems caused by different materials by improving connecting nodes of the prefabricated sandwich wallboard.
Background
The prefabricated urban underground comprehensive pipe gallery is a novel structural system which is greatly promoted and developed at present, wherein the prefabricated superposed prefabricated comprehensive pipe gallery system is paid more and more attention by the characteristics of light weight, convenience, strong anti-permeability capability, good anti-seismic performance and good overall performance. According to the structure system, the bottom plate and the top plate are prefabricated overlapped, the wall body is a prefabricated sandwich wall, and the bottom plate, the wall body and the top plate are connected into an integral structure through cast-in-place. As shown in chinese patent application CN205742265U, is a more typical architecture. For a prefabricated structure system, the node construction and the construction quality of prefabricated components are key links for determining success and failure of the structure system, particularly the node construction and the construction of an outer side wall, and the final impermeability and the seismic performance of an underground comprehensive pipe gallery are directly determined.
In this type of structural system, prefabricated outer wall two by two between the connected node be the impervious and anti-seismic performance's of direct influence piping lane important factor. For the construction treatment of the prefabricated outer side walls, the common practice at present is to install a reinforcement cage in a sandwich cast-in-place layer bridging two prefabricated sandwich superposed walls, and then pour concrete for direct connection. However, in the construction treatment, the main reinforcement and the truss reinforcement between the reinforcement cage and the wall plate are not connected at all, and the main reinforcement and the truss reinforcement are spliced completely by the adhesive force of the poured concrete, so that the connection mode between the wall plates is obviously weak in tensile strength, shear resistance and bending resistance, and cannot ensure that the wall plates have sufficient connection strength and good stress performance.
Another important factor directly affecting the impermeability and the seismic performance of the pipe gallery is the construction of the connecting joint of the prefabricated outer side wall and the cast-in-place section and the construction thereof. In this kind of structure, the less and erect muscle of sandwich wall's sandwich thickness is more, all adopts self-compaction concrete to pour in the practice, and the cast-in-place section of piping lane then adopts ordinary concrete, and this leads to prefabricated section and cast-in-place section concrete material different, and the long and narrow geometric characteristics of side wall handing-over department in addition bring very big inconvenience for the work progress, handle the improper, will directly influence the impervious and anti-seismic performance of piping lane, be the key control link in this kind of piping lane work progress. In the traditional method, a prefabricated section pipe gallery section is laid, a water stop steel plate is embedded in a sandwich wall in advance, the end part of the sandwich wall is plugged, and after concrete is poured, the construction of a cast-in-place section is carried out. However, this method inevitably has the following problems: 1) due to the existence of horizontal and middle vertical water stop steel plates at the bottom of the sandwich wall and reserved steel bars at the end part of the sandwich wall, the difficulty in end part plugging is increased, and sites such as slurry leakage and the like often occur, so that local concrete is loosened and leaks, and finally the waterproof effect is reduced; 2) in the system, the bottom plate and the top plate are both made of common concrete and can be poured with a pipe gallery cast-in-place section at one time, but because the sandwich wall needs to be poured separately from the cast-in-place concrete, the whole pipe gallery prefabricated section needs to be poured separately from the cast-in-place section to form a circle of construction cold joint, and extra water stop steel plates need to be additionally arranged on the bottom plate and the top plate, so that the construction difficulty and the construction cost are unnecessarily increased; 3) need accomplish at prefabricated section piping lane construction and demolish the end mould after, can carry out cast-in-place section construction, lead to construction cycle to increase, the efficiency of construction reduces.
In addition, separately pour by bottom plate and wallboard and roof, traditional prefabricated outside wall is usually buried the level stagnant water steel sheet underground in the bottom and is used for promoting the waterproof problem that the construction cold joint brought, consequently need open an operation entrance to a cave at bottom both ends for to the overlap joint welding of stagnant water steel sheet, but this kind of way obviously artificially has increased the construction cold joint, has weakened the impervious ability of piping lane.
Disclosure of Invention
The invention aims to overcome the defects and provide a connecting node of a prefabricated sandwich wall panel, which overcomes the defect that the connecting node is spliced completely by the adhesive force of poured concrete in the traditional structure by redesigning the connecting node of the prefabricated sandwich wall panel, so that the tensile, shearing and bending resistance of the connecting node are obviously enhanced, and the impermeability is greatly improved. The difficult problems in design and construction caused by different materials of the wall boards of the prefabricated section and the cast-in-place section are effectively solved. Meanwhile, the on-site plugging of the end part of the transition end on site is directly avoided, the one-time pouring operation of the prefabricated section and the cast-in-place section is realized, a large number of construction cold joints are avoided, the welding operation quality of the water stop steel plate is improved, the operation efficiency is greatly improved, the construction quality is improved, and the construction period and the engineering cost are reduced.
In order to achieve the above object, the present invention is realized by:
a prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard comprises an outer prefabricated plate and an inner prefabricated plate, wherein the inner prefabricated plate and the outer prefabricated plate are connected through an erecting truss; the elevation of the upper part of the inner precast slab is equal to the elevation of the bottom surface of the top plate of the pipe gallery, the elevation of the upper part of the outer precast slab is equal to the elevation of the top surface of the top plate of the pipe gallery, the elevation of the lower part of the inner precast slab is equal to the elevation of the top surface of the bottom plate of the pipe gallery, and the elevation of the lower part of the outer precast slab; the upper parts and the lower parts of the outer precast slab and the inner precast slab are connected into a whole through L-shaped ribs; the outer precast slab and the inner precast slab of the standard precast section pipe gallery are staggered in the horizontal direction at two ends and are connected into a whole through L-shaped ribs; the outer precast slabs and the inner precast slabs are horizontally staggered by a certain distance at a non-transition end and connected into a whole through L-shaped ribs, are horizontally parallel and level at the transition end and are connected through end plugging sections, and vertical water-stopping steel plates are arranged in the middle of the end plugging sections and are vertically connected with horizontal water-stopping steel plates at the bottoms of the prefabricated sandwich wallboards; the transition end is provided with an overhanging horizontal steel bar along the vertical direction for being connected with a cast-in-place section pipe gallery.
Prefabricated coincide assembled utility tunnel sandwich wallboard, the overhanging horizontal reinforcement's of transition section pipe gallery tip length accords with antidetonation standard requirement, carries out ligature overlap joint with the horizontal reinforcement of cast-in-place section pipe gallery.
Prefabricated coincide assembled utility tunnel sandwich wallboard, the outer prefabricated plate of standard prefabricated section piping lane staggers more than 300mm with interior prefabricated plate in both ends horizontal direction.
The prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard is characterized in that L-shaped steel bars on the side face horizontally bend from one side prefabricated plate to stress bars and then stretch into the other side prefabricated plate to form a whole at the end part.
Prefabricated coincide assembled utility tunnel sandwich wallboard, the perpendicular stagnant water steel sheet upper end of changeover portion piping lane tip and interior prefabricated plate parallel and level, after the higher authority laying-out corner cut of lower extreme and level stagnant water steel sheet, carry out two-sided welded connection in the mill in advance.
Prefabricated coincide assembled utility tunnel sandwich wallboard, the perpendicular stagnant water steel sheet both sides of changeover portion piping lane tip have welded the horizontal short reinforcement of equipartition, the short reinforcement both ends go deep into inside and outside prefabricated plate end and with vertical steel bar welded connection, pour tip concrete in the mill after the connection and form tip shutoff section, tip shutoff section thickness is not less than 100mm, both sides face is at the mill and is chisel hair processing, perpendicular stagnant water steel sheet stretches out tip shutoff section both sides length and is not less than 150 mm.
The length of the extending end part of the horizontal water stop steel plate of the transition section pipe gallery is the same as the extending length of the horizontal steel bar at the transition end, and the extending outermost side of the horizontal water stop steel plate of the transition section pipe gallery is not less than 100mm at the non-transition end at the other side so as to be welded with the horizontal water stop steel plate of the adjacent side;
the vertical splicing seam parts at the joint of every two of the inner prefabricated plate and the outer prefabricated plate are plugged by sealant; the L shape muscle of prefabricated sandwich wallboard concatenation node both sides staggers each other in the vertical direction to can overlap joint each other and form the rectangle overlap joint district, the rectangle overlap joint district sets up vertical reinforcing bar and carries out the enhancement connection, through a pair of V-arrangement splice bar welded connection of intercrossing between the vertical reinforcing bar, in vertical reinforcing bar upper end is buckled the back and is stretched into the roof, the lower extreme is buckled the back and is stretched into in the bottom plate.
The prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wall plate is characterized in that no erection rib is arranged in the range of a horizontal water stop steel plate arranged at the bottom of the prefabricated sandwich wall plate; the horizontal water stop steel plate at the bottom of the transition section pipe gallery is connected with the inner and outer prefabricated plates at two sides through the horizontal short steel bars at two sides; horizontal short steel bars are welded on two sides of a horizontal water stop steel plate at the bottom of the standard prefabricated section pipe gallery, and gaps are reserved between the end parts of the horizontal short steel bars and the inner sides of the inner prefabricated plate and the outer prefabricated plate of the prefabricated sandwich wall plate and are not directly connected;
the construction method of the sandwich wallboard of the prefabricated superposed assembly type underground comprehensive pipe gallery comprises the following steps:
1) on the prefabricated pipe gallery bottom plate which is laid completely, firstly hoisting a first section of side wall transition section prefabricated sandwich wall plate, assembling to one side of a corresponding first section of prefabricated superposed bottom plate, and temporarily positioning after adjusting the geometric position;
2) sequentially installing other prefabricated sandwich wallboards of the transition section, and temporarily positioning after adjusting the geometric position;
3) binding cast-in-place section pipe gallery bottom plate reinforcing steel bars on one side of the transition end of the first section of the transition section prefabricated sandwich wall plate; meanwhile, assembling a horizontal water-stopping steel plate corresponding to a second section of adjacent prefabricated sandwich wall plate on one side of a non-transition end, performing double-side welding with the horizontal water-stopping steel plate of the corresponding first section of prefabricated sandwich wall plate, and fixing the end part of the horizontal water-stopping steel plate with a nearby erection rib through steel bar welding;
4) hoisting a second section of prefabricated sandwich wall panel, splicing the second section of prefabricated sandwich wall panel with the first section of prefabricated sandwich wall panel, continuously binding the steel bars of the cast-in-situ section pipe gallery bottom plate, and erecting a corresponding template of the cast-in-situ section pipe gallery bottom plate;
5) hoisting a third section of prefabricated sandwich wall panel, splicing the third section of prefabricated sandwich wall panel with a second section of prefabricated sandwich wall panel, hoisting vertical steel bars at the joints of the second section of prefabricated tube gallery sandwich wall panel and the first section of prefabricated tube gallery sandwich wall panel for node reinforcing connection, and processing sealing glue at the joints of the wall panels; continuously binding the steel bars of the sandwiched wall plate of the cast-in-situ section pipe gallery, and gradually completing the support of the bottom plate template of the cast-in-situ section pipe gallery;
6) and analogizing in sequence, after the prefabricated section wallboard is hoisted, pouring prefabricated section superposed bottom plate concrete and cast-in-place section bottom plate concrete at one time;
7) laying all prefabricated superposed top plates and binding top plate steel bars; meanwhile, binding all wall plates and top plate steel bars of the cast-in-place section pipe gallery and erecting templates are completed;
8) respectively pouring concrete of the prefabricated section and the cast-in-place section pipe gallery sandwich wall panel;
9) integrally pouring concrete of the prefabricated section and the cast-in-place section pipe gallery top plate, and completing subsequent work;
in the step 4), when the second-section pipe gallery sandwich wall panel is hoisted, the second-section prefabricated sandwich wall panel is lifted, so that the bottom of the second-section prefabricated sandwich wall panel is not in contact with the steel bars at the end part of the second-section prefabricated superposed bottom plate, the second-section prefabricated sandwich wall panel is slowly moved to a corresponding position after penetrating the horizontal water stop steel plate from one end close to the first-section wall panel, then the second-section prefabricated sandwich wall panel is descended to be in place, the horizontal water stop steel plate is temporarily fixed after being adjusted, and meanwhile, the end part of the horizontal water stop steel plate and the nearby erection steel bar are;
in the step 5), when the vertical stressed steel bars between the connecting nodes of the first section and the second section of the prefabricated sandwich wall panel are hoisted, all the vertical stressed steel bars are connected into a whole through the V-shaped connecting bars, and then the whole vertical stressed steel bars are hoisted into the lap joint area from top to bottom;
in the step 6), before pouring the concrete of the bottom plate of the pipe gallery, the horizontal water stop steel plate at the bottom of the side wall of the cast-in-place section is pre-embedded, and is lapped with the horizontal water stop steel plate at the bottom of the transition end of the prefabricated sandwich wall plate at the first section of the transition section and is subjected to double-side welding.
According to the invention, through the design of the connection node of the prefabricated sandwich wall panel, the effective water resistance and good stress of the prefabricated sandwich wall panel are realized, the on-site construction difficulty is reduced, and the construction efficiency and quality are improved. Specifically, the present invention has the following advantages over the prior art:
1. compare with the connected node structure between two liang of traditional prefabricated sandwich wallboard, owing to have the overlap joint of the overhanging reinforcing bar of L shape to assisting vertical reinforcing bar, having avoided traditional structure to rely on the adhesive force of the concrete after pouring completely to splice, connected node's tensile, shear resistance and bending resistance are showing the reinforcing, and joint strength promotes by a wide margin and the further reinforcing of atress performance.
2. Compared with the traditional prefabricated sandwich wall panel with two parallel and level ends, the horizontal dislocation of the inner prefabricated plate and the outer prefabricated plate of the prefabricated sandwich wall panel causes the mutual dislocation of the splicing between every two prefabricated sandwich wall panels, increases the distance between the splicing seams of the inner prefabricated wall panel and the outer prefabricated wall panel, prolongs the water seepage path and greatly improves the anti-seepage capability.
3. Through the shutoff section of design changeover portion piping lane tip ingeniously, solved a great deal of design and the difficult problem in the construction that prefabricated section and cast-in-place section wallboard material difference brought effectively, directly avoided the on-the-spot shutoff to the changeover portion tip, can realize the one-time operation of pouring of prefabricated section and cast-in-place section, avoided a large amount of construction cold joints, promoted the operating efficiency by a wide margin, improved construction quality, reduced time limit for a project and engineering cost.
4. Compared with the traditional method of reserving operation holes at two ends of the bottom of the prefabricated overlapped sandwich wallboard, the construction method has the advantages that the construction sequence and the node structure are ingeniously arranged, the double-sided welding of the water stop steel plate is realized on the premise of avoiding the operation holes, and the standard requirements are met. Not only does not need to add construction cold joint, but also does not need to carry out additional hole plugging, and greatly improves the waterproof performance of the pipe gallery.
5. Because the water stop steel plate is welded before the prefabricated overlapped sandwich wall plate is installed, sufficient welding space and error adjusting space are provided, and the assembling precision and the welding quality of the water stop steel plate can be fully ensured.
Drawings
FIG. 1 is a schematic front view of a transition section prefabricated sandwich wall panel according to a preferred embodiment of the present invention;
FIG. 2 is a side schematic view of a transition section prefabricated sandwich wall panel;
FIG. 3 is a schematic vertical cross-sectional view of a transition section prefabricated sandwich wall panel;
FIG. 4 is a schematic horizontal cross-sectional view of a transition section prefabricated sandwich wall panel;
FIG. 5 is a schematic horizontal cross-sectional view of a standard prefabricated section prefabricated sandwich wall panel;
FIG. 6 is a schematic view of the connection between the vertical water stop steel plate and the horizontal water stop;
fig. 7 is a schematic view of the joint structure of the two-by-two splicing parts of the prefabricated sandwich wall panel.
Detailed Description
The patent of the invention is further illustrated by the following specific examples.
Referring to fig. 1, 2 and 3, the invention relates to a prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wall plate and a construction method thereof, comprising
A prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wall panel comprises an outer prefabricated plate 11 and an inner prefabricated plate 12, wherein the inner prefabricated plate and the outer prefabricated plate are connected through an erecting truss 22; the elevation of the upper part of the inner precast slab 12 is equal to the elevation of the bottom surface of the top plate of the pipe gallery, the elevation of the upper part of the outer precast slab 11 is equal to the elevation of the top surface of the top plate of the pipe gallery, the elevation of the lower part of the inner precast slab 12 is equal to the elevation of the top surface of the bottom plate of the pipe gallery, and the elevation of the lower part of the outer precast slab 11; the upper parts and the lower parts of the outer prefabricated plate 11 and the inner prefabricated plate 12 are connected into a whole through L-shaped ribs 23 and 24; the standard prefabricated section pipe gallery outer prefabricated plate 11 and the standard prefabricated section pipe gallery inner prefabricated plate 12 are horizontally staggered by a certain distance at two ends and are connected into a whole through L-shaped ribs 25; the outer precast slab 11 and the inner precast slab 12 are horizontally staggered by a certain distance at a non-transition end, are connected into a whole through L-shaped ribs 25, are horizontally parallel and level at the transition end and are connected through an end plugging section 13, and a vertical water stop steel plate 31 is arranged in the middle of the end plugging section 13 and is vertically connected with a horizontal water stop steel plate 32 at the bottom of the prefabricated sandwich wallboard; the transition end is provided with an overhanging horizontal steel bar 21 along the vertical direction for connecting with a cast-in-place section pipe gallery.
In the scheme, the length of the horizontal steel bar 21 extending outwards from the end part of the transition section pipe gallery meets the requirement of earthquake-resistant specification, and is in binding and lap joint with the horizontal steel bar of the cast-in-situ section pipe gallery;
in the scheme, the external precast slab 11 and the internal precast slab 12 of the standard precast section pipe gallery are staggered by more than 300mm in the horizontal direction at two ends;
as shown in fig. 4 and 5, in the above solution, the side L-shaped steel bar 25 is bent from one prefabricated plate to the stress bar and then extends into the other prefabricated plate, and the end is formed into a whole;
in the scheme, as shown in fig. 6, after the upper end of the vertical water stop steel plate 31 at the end part of the transition section pipe gallery is flush with the inner precast slab 12 and the lower end of the vertical water stop steel plate is lofted and cut with the upper edge of the horizontal water stop steel plate 32, double-sided welding connection is performed in a factory in advance;
as shown in fig. 4, in the above scheme, uniformly distributed horizontal short steel bars 33 are welded on two sides of the vertical water-stop steel plate 31 at the end of the transition section pipe gallery, two ends of each short steel bar 33 penetrate into the ends of the inner and outer prefabricated plates 11 and 12 and are welded and connected with the vertical steel bars, end concrete is poured in a factory to form an end blocking section 13 after connection, the thickness of the end blocking section 13 is not less than 100mm, chiseling treatment is performed on two side surfaces in the factory, and the length of the vertical water-stop steel plate 31 extending out of two sides of the end blocking section is not less;
in the scheme, the length of the extending end part of the horizontal water stop steel plate 32 of the transition section pipe gallery is the same as the extending length of the horizontal steel bar 21, and the extending outermost side of the horizontal water stop steel plate 32 of the transition section pipe gallery is not less than 100mm at the non-transition end of the other side so as to be welded with the horizontal water stop steel plate of the adjacent side;
as shown in fig. 7, in the above solution, the vertical seam splicing part at the joint of the inner and outer prefabricated panels 11 and 12 is sealed by using a sealant 51; the L-shaped ribs 25 on the two sides of the splicing node of the prefabricated sandwich wall panel are staggered in the vertical direction so as to be mutually lapped and form a rectangular lapping region, the rectangular lapping region is provided with vertical steel bars 42 for reinforced connection, the vertical steel bars 42 are connected by welding through a pair of V-shaped connecting bars 41 which are mutually and reversely crossed, the upper ends of the vertical steel bars 42 extend into the top plate after being bent, and the lower ends of the vertical steel bars 42 extend into the bottom plate after being bent;
in the scheme, no erection rib 22 is arranged in the range of the horizontal water stop steel plate 32 arranged at the bottom of the prefabricated sandwich wallboard; the horizontal water stop steel plate 32 at the bottom of the transition section pipe gallery is connected with the inner and outer precast slabs 11 and 12 at the two sides through the horizontal short steel bars 33 at the two sides; horizontal short steel bars 33 are welded on two sides of a horizontal water stop steel plate 32 at the bottom of the standard prefabricated section pipe gallery, and gaps are reserved between the end parts of the horizontal short steel bars 33 and the inner sides of the prefabricated plates 11 and 12 inside and outside the prefabricated sandwich wall plate and are not directly connected;
the invention also provides a construction method of the sandwich wallboard of the prefabricated superposed assembly type underground comprehensive pipe gallery, which comprises the following steps:
1) on the prefabricated pipe gallery bottom plate which is laid completely, firstly hoisting a first section of side wall transition section prefabricated sandwich wall plate, assembling to one side of a corresponding first section of prefabricated superposed bottom plate, and temporarily positioning after adjusting the geometric position;
2) sequentially installing other prefabricated sandwich wallboards of the transition section, and temporarily positioning after adjusting the geometric position;
3) binding cast-in-place section pipe gallery bottom plate reinforcing steel bars on one side of the transition end of the first section of the transition section prefabricated sandwich wall plate; meanwhile, on one side of the non-transition end, assembling a horizontal water stop steel plate 32 corresponding to the second section of adjacent prefabricated sandwich wall panel, performing double-sided welding with the horizontal water stop steel plate 32 of the corresponding first section of prefabricated sandwich wall panel, and fixing the water stop steel plate 32 at the end part with the nearby erection rib 22 through steel bar welding;
4) hoisting a second section of prefabricated sandwich wall panel, splicing the second section of prefabricated sandwich wall panel with the first section of prefabricated sandwich wall panel, continuously binding the steel bars of the cast-in-situ section pipe gallery bottom plate, and erecting a corresponding template of the cast-in-situ section pipe gallery bottom plate;
5) hoisting a third section of prefabricated sandwich wall panel, splicing the third section of prefabricated sandwich wall panel with a second section of prefabricated sandwich wall panel, hoisting vertical steel bars 42 at the joints of the second section of prefabricated sandwich wall panel and the first section of prefabricated pipe gallery sandwich wall panel for node reinforcing connection, and plugging sealant 51 at the joints of the wall panels for treatment; continuously binding the steel bars of the sandwiched wall plate of the cast-in-situ section pipe gallery, and gradually completing the support of the bottom plate template of the cast-in-situ section pipe gallery;
6) and analogizing in sequence, after the prefabricated section wallboard is hoisted, pouring prefabricated section superposed bottom plate concrete and cast-in-place section bottom plate concrete at one time;
7) laying all prefabricated superposed top plates and binding top plate steel bars; meanwhile, binding all wall plates and top plate steel bars of the cast-in-place section pipe gallery and erecting templates are completed;
8) respectively pouring concrete of the prefabricated section and the cast-in-place section pipe gallery sandwich wall panel;
9) and integrally pouring concrete of the prefabricated section and the cast-in-place section pipe gallery top plate, and finishing subsequent work.
In the step 4), when the second-section pipe gallery sandwich wall panel is hoisted, the second-section prefabricated sandwich wall panel is lifted, so that the bottom of the second-section prefabricated sandwich wall panel is not in contact with the steel bars at the end part of the second-section prefabricated superposed bottom plate, the second-section prefabricated sandwich wall panel slowly moves to a corresponding position after penetrating the horizontal water stop steel plate 32 from one end close to the first-section wall panel, then the second-section prefabricated sandwich wall panel descends to be in place, the horizontal water stop steel plate is temporarily fixed after being adjusted, and meanwhile, the end part of the horizontal water stop steel plate is fixed with the nearby erection rib 22 through steel bar;
in the step 5), when the vertical stressed steel bars 42 between the joints of the first section and the second section of the prefabricated sandwich wall panel are hoisted, all the vertical stressed steel bars 42 are firstly connected into a whole through the V-shaped connecting bars 41, and then the whole vertical stressed steel bars are hoisted into the lap joint area from top to bottom.
In the step 6), before pouring the concrete of the bottom plate of the pipe gallery, a horizontal water stop steel plate at the bottom of the side wall of the cast-in-place section is pre-embedded, and is overlapped with a horizontal water stop steel plate 32 at the bottom of one side of the transition end of the prefabricated sandwich wall plate of the first section of the transition section and is subjected to double-side welding;
compared with the traditional connecting node structure between every two prefabricated sandwich wallboards, the connecting node structure has the advantages that due to the fact that the L-shaped overhanging reinforcing steel bars are in lap joint connection and the vertical reinforcing steel bars are used as the auxiliary materials, the traditional structure is prevented from being spliced completely by the adhesive force of poured concrete, the tensile capacity, the shearing capacity and the bending resistance of the connecting node are obviously enhanced, the connecting strength is greatly improved, and the stress performance is further enhanced; compared with the traditional prefabricated sandwich wall panel with two flush ends, the splicing of every two prefabricated sandwich wall panels is staggered because the inner prefabricated panels and the outer prefabricated panels of the prefabricated sandwich wall panels are horizontally staggered, the distance between the splicing seams of the inner prefabricated panel and the outer prefabricated panel is increased, the water seepage path is prolonged, and the anti-seepage capability is greatly improved; by skillfully designing the plugging section at the end part of the pipe gallery of the transition section, a plurality of design and construction problems caused by different materials of wallboards of the prefabricated section and the cast-in-place section are effectively solved, the on-site plugging of the end part of the transition end on site is directly avoided, the one-time pouring operation of the prefabricated section and the cast-in-place section can be realized, a large amount of construction cold joints are avoided, the operation efficiency is greatly improved, the construction quality is improved, and the construction period and the engineering cost are reduced; compared with the traditional method of reserving operation holes at two ends of the bottom of the prefabricated overlapped sandwich wallboard, the construction method has the advantages that the construction sequence and the node structure are ingeniously arranged, the double-sided welding of the water stop steel plate is realized on the premise of avoiding the operation holes, and the standard requirements are met. Construction cold joints are not added, and extra hole plugging is not needed, so that the waterproof performance of the pipe gallery is greatly improved; because the water stop steel plate is welded before the prefabricated overlapped sandwich wall plate is installed, sufficient welding space and error adjusting space are provided, and the assembling precision and the welding quality of the water stop steel plate can be fully ensured.
Claims (10)
1. The utility model provides a prefabricated coincide assembled utility tunnel sandwich wallboard, characterized by: the prefabricated slab comprises an outer prefabricated slab and an inner prefabricated slab, wherein the inner prefabricated slab and the outer prefabricated slab are connected through a vertical truss; the elevation of the upper part of the inner precast slab is equal to the elevation of the bottom surface of the top plate of the pipe gallery, the elevation of the upper part of the outer precast slab is equal to the elevation of the top surface of the top plate of the pipe gallery, the elevation of the lower part of the inner precast slab is equal to the elevation of the top surface of the bottom plate of the pipe gallery, and the elevation of the lower part of the outer precast slab; the upper parts and the lower parts of the outer precast slab and the inner precast slab are connected into a whole through L-shaped ribs; the outer precast slab and the inner precast slab of the standard precast section pipe gallery are staggered in the horizontal direction at two ends and are connected into a whole through L-shaped ribs; the outer precast slabs and the inner precast slabs are horizontally staggered by a certain distance at a non-transition end and connected into a whole through L-shaped ribs, are horizontally parallel and level at the transition end and are connected through end plugging sections, and vertical water-stopping steel plates are arranged in the middle of the end plugging sections and are vertically connected with horizontal water-stopping steel plates at the bottoms of the prefabricated sandwich wallboards; the transition end is provided with an overhanging horizontal steel bar along the vertical direction for being connected with a cast-in-place section pipe gallery.
2. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: the length of the horizontal reinforcing steel bar extending outwards at the end part of the transition section pipe gallery meets the requirement of earthquake-resistant specification, and is in binding and lap-joint connection with the horizontal reinforcing steel bar of the cast-in-place section pipe gallery.
3. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: and the outer prefabricated plate and the inner prefabricated plate of the standard prefabricated section pipe gallery are staggered by more than 300mm in the horizontal direction at two ends.
4. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: the side L-shaped steel bars are bent from the horizontal direction of the prefabricated plate at one side to the stress bar and then extend into the prefabricated plate at the other side to form a whole at the end.
5. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: the perpendicular stagnant water steel sheet upper end of changeover portion piping lane tip and interior prefabricated plate parallel and level, the lower extreme carries out two-sided welded connection at the mill in advance with the higher authority laying-out corner cut of level stagnant water steel sheet after.
6. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: the perpendicular stagnant water steel sheet both sides of changeover portion piping lane tip are welded the horizontal short steel bar of equipartition, and the short steel bar both ends are gone deep into in the inside and outside prefabricated plate end and with vertical steel bar welded connection, pour tip concrete in the mill after the connection and form tip shutoff section, tip shutoff section thickness is not less than 100mm, and both sides face carries out the chisel hair processing in the mill, and perpendicular stagnant water steel sheet stretches out tip shutoff section both sides length and is not less than 150 mm.
7. The prefabricated laminated assembled underground utility tunnel sandwich wall panel of claim 1, wherein: the horizontal water stop steel plate of the transition section pipe gallery is the same as the horizontal steel bar in length of the extending end part of the transition end, and the extending outermost side of the horizontal water stop steel plate is not less than 100mm in the non-transition end of the other side so as to be welded with the adjacent side horizontal water stop steel plate.
8. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: sealing the vertical abutted seam parts at the joint of every two inner prefabricated plates and the outer prefabricated plates by adopting sealant; the L shape muscle of prefabricated sandwich wallboard concatenation node both sides staggers each other in the vertical direction to can overlap joint each other and form the rectangle overlap joint district, the rectangle overlap joint district sets up vertical reinforcing bar and carries out the enhancement connection, through a pair of V-arrangement splice bar welded connection of intercrossing between the vertical reinforcing bar, in vertical reinforcing bar upper end is buckled the back and is stretched into the roof, the lower extreme is buckled the back and is stretched into in the bottom plate.
9. The prefabricated, stacked and assembled underground utility tunnel sandwich wall panel of claim 1, wherein: no erection rib is arranged in the range of the horizontal water stop steel plate arranged at the bottom of the prefabricated sandwich wall plate; the horizontal water stop steel plate at the bottom of the transition section pipe gallery is connected with the inner and outer prefabricated plates at two sides through the horizontal short steel bars at two sides; horizontal short steel bars are welded on two sides of a horizontal water stop steel plate at the bottom of the standard prefabricated section pipe gallery, and gaps are reserved between the end parts of the horizontal short steel bars and the inner sides of the inner and outer prefabricated plates of the prefabricated sandwich wall plate and are not directly connected.
10. The construction method of the sandwich wall panel of the prefabricated superposed assembly type underground comprehensive pipe gallery of any one of claims 1 to 9 is characterized in that: which comprises the following steps:
1) on the prefabricated pipe gallery bottom plate which is laid completely, firstly hoisting a first section of side wall transition section prefabricated sandwich wall plate, assembling to one side of a corresponding first section of prefabricated superposed bottom plate, and temporarily positioning after adjusting the geometric position;
2) sequentially installing other prefabricated sandwich wallboards of the transition section, and temporarily positioning after adjusting the geometric position;
3) binding cast-in-place section pipe gallery bottom plate reinforcing steel bars on one side of the transition end of the first section of the transition section prefabricated sandwich wall plate; meanwhile, assembling a horizontal water-stopping steel plate corresponding to a second section of adjacent prefabricated sandwich wall plate on one side of a non-transition end, performing double-side welding with the horizontal water-stopping steel plate of the corresponding first section of prefabricated sandwich wall plate, and fixing the end part of the horizontal water-stopping steel plate with a nearby erection rib through steel bar welding;
4) hoisting a second section of prefabricated sandwich wall panel, splicing the second section of prefabricated sandwich wall panel with the first section of prefabricated sandwich wall panel, continuously binding the steel bars of the cast-in-situ section pipe gallery bottom plate, and erecting a corresponding template of the cast-in-situ section pipe gallery bottom plate;
5) hoisting a third section of prefabricated sandwich wall panel, splicing the third section of prefabricated sandwich wall panel with a second section of prefabricated sandwich wall panel, hoisting vertical steel bars at the joints of the second section of prefabricated tube gallery sandwich wall panel and the first section of prefabricated tube gallery sandwich wall panel for node reinforcing connection, and processing sealing glue at the joints of the wall panels; continuously binding the steel bars of the sandwiched wall plate of the cast-in-situ section pipe gallery, and gradually completing the support of the bottom plate template of the cast-in-situ section pipe gallery;
6) and analogizing in sequence, after the prefabricated section wallboard is hoisted, pouring prefabricated section superposed bottom plate concrete and cast-in-place section bottom plate concrete at one time;
7) laying all prefabricated superposed top plates and binding top plate steel bars; meanwhile, binding all wall plates and top plate steel bars of the cast-in-place section pipe gallery and erecting templates are completed;
8) respectively pouring concrete of the prefabricated section and the cast-in-place section pipe gallery sandwich wall panel;
9) integrally pouring concrete of the prefabricated section and the cast-in-place section pipe gallery top plate, and completing subsequent work;
in the step 4), when the second-section pipe gallery sandwich wall panel is hoisted, the second-section prefabricated sandwich wall panel is lifted, so that the bottom of the second-section prefabricated sandwich wall panel is not in contact with the steel bars at the end part of the second-section prefabricated superposed bottom plate, the second-section prefabricated sandwich wall panel is slowly moved to a corresponding position after penetrating the horizontal water stop steel plate from one end close to the first-section wall panel, then the second-section prefabricated sandwich wall panel is descended to be in place, the horizontal water stop steel plate is temporarily fixed after being adjusted, and meanwhile, the end part of the horizontal water stop steel plate and the nearby erection steel bar are;
in the step 5), when the vertical stressed steel bars between the connecting nodes of the first section and the second section of the prefabricated sandwich wall panel are hoisted, all the vertical stressed steel bars are connected into a whole through the V-shaped connecting bars, and then the whole vertical stressed steel bars are hoisted into the lap joint area from top to bottom;
in the step 6), before pouring the concrete of the bottom plate of the pipe gallery, the horizontal water stop steel plate at the bottom of the side wall of the cast-in-place section is pre-embedded, and is lapped with the horizontal water stop steel plate at the bottom of the transition end of the prefabricated sandwich wall plate at the first section of the transition section and is subjected to double-side welding.
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| CN202010028205.6A CN111173029A (en) | 2020-01-10 | 2020-01-10 | Prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard and construction method thereof |
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| CN202010028205.6A CN111173029A (en) | 2020-01-10 | 2020-01-10 | Prefabricated superposed assembly type underground comprehensive pipe gallery sandwich wallboard and construction method thereof |
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