CN112049218A - Municipal concrete drainage pipeline laying construction method - Google Patents
Municipal concrete drainage pipeline laying construction method Download PDFInfo
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- CN112049218A CN112049218A CN202010870275.6A CN202010870275A CN112049218A CN 112049218 A CN112049218 A CN 112049218A CN 202010870275 A CN202010870275 A CN 202010870275A CN 112049218 A CN112049218 A CN 112049218A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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Abstract
The invention discloses a municipal concrete drainage pipeline laying construction method. Constructing by adopting a standardized template system, wherein the standardized template system comprises an aluminum alloy template, a steel structure back support, a connecting flower stand and a pedal, the template comprises a standard template and an adjusting template, and positioning pin holes are formed in the four lateral sides and the back of the template; the steel structure back support comprises a steel skeleton, the steel skeleton comprises an outer vertical rod, an inner vertical rod, an upper cross rod, a lower cross rod and an inclined rod which are connected, the end part of the extending end of the upper cross rod is connected with a back support screw rod, the lower ends of the outer vertical rod and the inner vertical rod are respectively connected with an outer supporting leg and an inner supporting leg, the outer vertical rod is provided with two first positioning pins corresponding to positioning pin holes in the template, and the upper cross rod is provided with positioning pin holes corresponding to the outer supporting legs; the connecting flower stand is of a rectangular frame structure, and two short sides of the connecting flower stand are respectively connected with second positioning pins corresponding to positioning pin holes arranged on the inner vertical rods; the four corners of the pedal are provided with connecting holes corresponding to the connecting holes arranged on the upper cross rod.
Description
Technical Field
The invention relates to a municipal concrete drainage pipeline laying construction method, and belongs to the technical field of building construction.
Background
The municipal drainage pipeline adopts a non-pressure drainage design, so that rain sewage in the pipeline flows according to a pipeline ramp. As urban underground pipelines are various in variety, in order to prevent the urban underground pipelines from colliding with pipelines such as tap water, reclaimed water, electric power, fuel gas and heat power in elevation, the buried depth of the drainage pipeline is 3-7 m in common. Drainage pipelines are usually laid by a grooving method, and the excavation of a groove is supported by the Larsen steel sheet pile matched with the inner support system of the enclosing purlin.
According to the related spirit of the national implementation of building standardization, municipal drainage pipelines are constructed according to the standard atlas of municipal drainage pipeline engineering and accessory facilities 06MS 201. According to the requirements of a drawing set and a design drawing, after a pipe laying process, in order to prevent a socket joint from falling off, a pipeline foundation needs to be encapsulated, a foundation encapsulation supporting angle is generally 180 degrees or 120 degrees, and the encapsulated concrete continuously extends along the longitudinal direction of a pipe ditch from a pipeline base to two sides. The traditional foundation concrete construction method at present is a glued wood formwork and square timber support system, and the formwork system has the following outstanding defects: firstly because pipeline construction is located moist wet water environment more, the plywood deformation damage is fast, and the turnover number of times is few, is generally 3 ~ 4 times, and extravagant very serious. Secondly, the plywood has large deformation when being reused, particularly has serious corner damage, poor sealing performance and installation precision of the template and poor engineering quality. Thirdly, the template and the square timber need to be cut according to the size of the foundation concrete, the material waste is serious, the field is messy, and the civilized construction is poor. Fourthly, construction operation is carried out in the deep groove, the operation space on two sides of the pipeline is narrow, the sizes of components such as a template back support and the like are irregular, the weight is large, the speed of installing and dismantling the template is very slow, and the labor intensity of workers is very high. Fifthly, a construction operation platform and a walking channel along the longitudinal direction of the groove are not provided, the concrete pouring operation is very inconvenient, and great potential safety hazards exist.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a municipal concrete drainage pipeline laying construction method capable of realizing rapid construction.
The invention is realized by the following technical scheme: a municipal concrete drainage pipeline laying construction method is characterized in that: the method comprises the following steps of constructing by adopting a standardized template system, wherein the standardized template system comprises a template, a steel structure back support, a connecting flower stand and a pedal, the template is a rectangular template, the template is an aluminum alloy template, the template comprises a standard template and an adjusting template, and positioning pin holes are formed in the four lateral sides and the back of the template; the steel structure back support comprises a section steel framework, the section steel framework comprises an outer vertical rod and an inner vertical rod which are vertically arranged, the upper ends of the outer vertical rod and the inner vertical rod are connected with a horizontal upper transverse rod, one end of the upper transverse rod close to the inner vertical rod extends outwards, the lower ends of the outer vertical rod and the inner vertical rod are connected with a horizontal lower cross rod, an inclined rod is fixedly connected between the extending end of the upper cross rod and the lower end of the inner vertical rod, the end part of the extending end of the upper cross rod is connected with an adjustable back-supporting screw rod, the lower end of the outer vertical rod is connected with an adjustable outer supporting leg, the lower end of the inner vertical rod is connected with an adjustable inner supporting leg, two first positioning pins are arranged on the outer side of the outer vertical rod at intervals along the height direction, the first positioning pin corresponds to a positioning pin hole on the template, and a positioning pin hole corresponding to the outer support leg is arranged on the upper cross rod; the connecting flower stand is of a rectangular frame structure, two second positioning pins are fixedly connected to two short sides of the connecting flower stand respectively, and the second positioning pins correspond to positioning pin holes formed in the inner vertical rods; the pedal is of a rectangular structure, and connecting holes corresponding to the connecting holes arranged on the upper cross rod are formed in the four corners of the pedal;
the method comprises the following construction steps:
firstly, after the pouring of cushion concrete is finished and the allowable strength is reached, measuring and setting off, and positioning a pipeline laying center line and a pipeline foundation concrete side line;
secondly, concrete pipelines are paved section by section, and matched rubber gaskets are stuffed between pipe sections;
thirdly, positioning the position of each anchoring rib on the concrete cushion layer according to the measurement paying-off, and vertically drilling downwards at an anchoring point by adopting a handheld impact drill;
fourthly, erecting the mold according to a positioning line of the template, then installing steel structure back supports on the back sides of the templates, arranging two vertical steel structure back supports behind each template, wherein the distance between the two steel structure back supports is 0.6m, the two steel structure back supports are both positioned at 1/4 length positions of the template, and each steel structure back support is arranged perpendicular to the template and is connected with a positioning pin hole in the template through a first positioning pin;
fifthly, after the inner supporting leg, the outer supporting leg and the back support screw rod of the steel structure back support are adjusted to proper lengths, a connecting flower stand is erected between the steel structure back supports, and the connecting flower stand is connected with a positioning pin hole in an inner vertical rod of the steel structure back support through a second positioning pin;
sixthly, after the connection flower frame is erected, paving a pedal, wherein the pedal is paved on an upper cross rod of the steel framework, and connecting holes at four corners of the pedal are aligned with connecting holes in the upper cross rod of the steel framework and are fixedly connected through bolts;
(7) after the first template unit is assembled, sequentially assembling the other template units;
(8) and after the template is installed and fixed, pouring pipeline foundation encapsulation concrete.
In the invention, the template adopts the standard template and the adjusting template, and different standard modules and adjusting templates can be selected and combined according to different sizes of the foundation encapsulation concrete during construction. The steel structure back support is used for supporting the template and is connected to the back side of the template during construction, the steel structure back support can be connected with the positioning pin holes in the template through the positioning pins of the steel structure back support, and the other end of the steel structure back support can tightly support and maintain the steel sheet pile through the back support screw rod to support the template. The connecting flower shelf is used for connecting two adjacent steel structure back supports, so that the template, the steel structure back supports and the connecting flower shelf form a stable space integral structure. The steel framework of the steel structure back support is arranged in a vertical plane in a vertical direction when the flower stand is connected, and the positioning pins penetrate through the corresponding positioning pin holes in the inner vertical rods of the steel framework to realize connection. The footboard is used for as the operation platform during construction, directly sets up on shaped steel skeleton's last horizontal pole during the installation, and the connecting hole of footboard four corners is counterpointed with the connecting hole on shaped steel skeleton's the last horizontal pole, and accessible bolted connection is fixed. When the steel structure back support is constructed, one or more layers can be arranged according to the size of the encapsulated concrete, and when the multi-layer steel structure back support is arranged, the connection between the upper and lower steel structure back supports is inserted into the corresponding positioning pin hole on the upper cross rod of the lower steel structure back support through the outer leg of the upper steel structure back support to realize the connection positioning. The back support screw rod, the outer support leg and the inner support leg can be adjusted in length.
Further, in order to keep the back-supporting system perpendicular to the formwork surface and prevent torsion, the cross section of the first positioning pin is square.
Further, in order to ensure light weight, the outer vertical rod, the inner vertical rod, the upper cross rod, the lower cross rod and the inclined rod of the steel skeleton are all channel steel.
Further, in order to ensure light weight, the pedal is made of aluminum alloy or galvanized steel sheets.
Further, for the convenience of supporting, backing plates are arranged at the outer side end of the back support screw rod, the lower end of the screw rod of the inner supporting leg and the screw rod of the outer supporting leg.
Further, when the pipe diameter is large and the thickness of the foundation encapsulation concrete is large, a double-layer or three-layer steel structure back support is adopted as a support, each template unit is constructed according to the sequence from bottom to top, and after the first layer of templates and the supports are installed, the second layer of templates and the supports are installed; and after the installation is finished, installing the next unit, and so on.
Furthermore, the standardized template system also comprises an inclined strut, and two ends of the inclined strut are respectively provided with a connecting pin hole; when the size of the template is not matched with that of the steel structure back support, the upper end of the template is connected with the steel structure back support through the inclined support rod to support the template.
The invention has the beneficial effects that:
1. the design of the shaped metal template is adopted, the processing and mounting precision of the template is high, and the concrete construction quality is easy to control.
2. By adopting the light weight design, the weight of various components such as the aluminum alloy template, the steel structure back support, the pedal and the like is light, the weight of the maximum single piece is not more than 18kg, the weight is only one third of that of the same type of steel template, mechanical equipment is not needed, and the labor intensity of workers is greatly reduced.
3. The standardized and modularized sizing design is adopted, the mounting and dismounting speed of the template is high, and the dismounting can be quickly completed by only two persons matching and using portable tools such as a spanner.
4. The aluminum alloy template has the advantages of light weight, high strength, corrosion resistance, excellent corrosion resistance, suitability for damp and wet underground engineering construction operation environment, turnover use for more than 200 times which is far higher than that of plywood for 3-4 times, high recycling value, resource saving and environment protection.
5. The pipeline laying construction environment is severe, the space is narrow, and by laying the pedal, a safe, stable and smooth operating platform and a walking channel are provided for workers, so that the potential safety hazard is reduced, and the construction efficiency is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a die plate system in the case of a 400mm pipe diameter in an embodiment;
FIG. 2 is a schematic cross-sectional view of a template system in the case of a 600mm tube diameter in an embodiment;
FIG. 3 is a schematic cross-sectional view of a die plate system in the case of 800mm tube diameter in an embodiment;
FIG. 4 is a schematic cross-sectional view of a template system in the case of a 1000mm pipe diameter in an embodiment;
FIG. 5 is a schematic cross-sectional view of a die plate system in the case of a 1200mm tube diameter in an embodiment;
FIG. 6 is a schematic cross-sectional view of a die plate system in the case of a 1500mm pipe diameter in an embodiment;
FIG. 7 is a schematic cross-sectional view of a die plate system in the case of a pipe diameter of 1800mm in the exemplary embodiment;
FIG. 8 is a schematic plan view of the invention in an embodiment (with the foot pedal not shown on one side);
FIG. 9 is a schematic front view of a template in the present invention in an embodiment;
FIG. 10 is a side view of FIG. 9;
FIG. 11 is a rear view of FIG. 9;
FIG. 12 is a schematic structural view of a steel back brace according to the present invention in an exemplary embodiment;
fig. 13 is a schematic view of a connection structure of a screw and a channel steel in the steel structure back support according to the present invention;
FIG. 14 is a schematic view of the connecting planter in accordance with the present invention;
in the figure, 1, a template, 1-1, a panel, 1-2, a stiffening rib, 1-3, a positioning pin hole on the template, 2, a steel structure back support, 2-1, a profile steel framework, 2-1-1, an upper cross rod, 2-1-2, a lower cross rod, 2-1-3, an outer vertical rod, 2-1-4, an inner vertical rod, 2-1-5, an inclined rod, 2-2, a back support screw rod, 2-3, an outer support leg, 2-4, an inner support leg, 2-5, a first positioning pin, 2-6, a backing plate, 2-7, a positioning pin hole, 2-8, a connecting hole, 2-9, a positioning pin hole, 3, a connecting flower stand, 3-1, a second positioning pin, 4, an inclined support rod, 5, a pedal, 6, a concrete cushion layer, 7 and a concrete foundation, 8. the steel sheet pile comprises a steel sheet pile body 9, a pipeline 10, a screw rod 11, a positioning steel sheet 12, a positioning steel sheet 13, channel steel 14, a connecting piece body 15, a positioning pin hole 16 and a rib plate.
Detailed Description
The invention will now be further illustrated by way of non-limiting examples and with reference to the accompanying drawings, without being limited thereto. The invention only aims at the basic type of the socket type concrete pipeline commonly used in the standard atlas, and other types are out of the research scope of the invention.
As shown in the attached drawings, the municipal concrete drainage pipeline laying construction method adopts a standardized template system for construction, and the standardized template system comprises a template 1, a steel structure back support 2, a connecting flower stand 3 and a pedal 5.
The template 1 is a rectangular template, and the template 1 is an aluminum alloy template. The aluminum alloy formwork 1 consists of a panel 1-1 and grid type stiffening ribs 1-2 arranged on the back side of the panel, the thickness of the panel 1-1 is 5-6 mm according to construction load and precision requirements of foundation encapsulation concrete, the stiffening ribs 1-2 are combined by rib plates and angle iron, the height of the ribs is about 8cm usually, and the specific size is determined according to load calculation, so that the aluminum alloy formwork can meet the requirements of torsion resistance and deformation. According to the standard atlas, the sizes of the foundation encapsulation concrete required by pipelines with different pipe diameters are different. Template 1 is divided into standard and adjusted templates according to the requirements of standardization and versatility, as shown in the following table:
| template numbering | Standard board | Template numbering | Adjusting plate 1 | Template | Adjusting plate | 2 |
| A1 | 1.2*0.64m | B1 | 0.6*0.64m | C1 | 0.2*0.64m | |
| A2 | 1.2*0.32m | B2 | 0.6*0.32m | C2 | 0.2*0.32m | |
| A3 | 1.2*0.16m | B3 | 0.6*0.16m | C3 | 0.2*0.16m |
The four sides and the back of the template 1 are provided with a plurality of positioning pin holes 1-3 for connection and positioning.
The steel structure back support 2 comprises a steel section frame 2-1, the steel section frame 2-1 is of an in-plane structure, the section steel framework 2-1 comprises an outer vertical rod 2-1-3 and an inner vertical rod 2-1-4 which are vertically arranged, the upper ends of the outer upright stanchion 2-1-3 and the inner upright stanchion 2-1-4 are connected with a horizontal upper cross bar 2-1-1, one end of the upper cross bar 2-1-1 close to the inner upright stanchion 2-1-4 extends outwards, the lower ends of the outer vertical rods 2-1-3 and the inner vertical rods 2-1-4 are connected with a horizontal lower cross bar 2-1-2, an inclined rod 2-1-5 is fixedly connected between the extending end of the upper cross rod 2-1-1 and the lower end of the inner vertical rod 2-1-4. The outer vertical rod 2-1-3, the inner vertical rod 2-1-4, the upper cross rod 2-1-1, the lower cross rod 2-1-2 and the diagonal rods 2-1-5 are all made of channel steel, all the rod pieces are connected by welding, the openings of the channel steel are inward during welding, specifically, the openings of the channel steel of the upper cross rod are downward, the openings of the lower cross rod are upward, the openings of the outer vertical rod and the inner vertical rod are opposite, and the openings of the diagonal rods are upward. In order to ensure the strength of the profile steel framework, inclined rods can be arranged between the rod pieces as required, and the inclined rods can be made of angle steel. The end part of the extending end of the upper cross rod 2-1-1 is connected with an adjustable back-supporting screw rod 2-2, the lower end of the outer upright rod 2-1-3 is connected with an adjustable outer supporting leg 2-3, and the lower end of the inner upright rod 2-1-4 is connected with an adjustable inner supporting leg 2-4. The back-supporting screw rods 2-2, the outer supporting legs 2-3 and the inner supporting legs 2-4 are all of screw rod structures, the connection between each screw rod and the corresponding channel steel adopts a structure as shown in the attached drawing 10, and two steel plates are welded at intervals at the connecting ends of the corresponding channel steel respectively: the positioning steel plate 11 and the positioning steel plate 12 are respectively provided with a positioning hole, the screw rod is inserted into the positioning hole, and the length of the screw rod is adjusted through a matched nut. In the embodiment, backing plates 2-6 are arranged at the outer side end of the back support screw rod 2-2, the lower end of the screw rod of the inner support leg 2-4 and the screw rod of the outer support leg 2-3, wherein the backing plates 2-6 of the back support screw rod 2-2 are connected in a welding mode, an internal thread is arranged at the center of the backing plate on the screw rod of the outer support leg 2-3 and is in threaded connection with the screw rod of the outer support leg 2-3, and the position of the backing plate can be adjusted on the screw rod of the outer support leg 2-3. The supporting legs can play a role in supporting and can also play a role in positioning and anchoring.
Two first positioning pins 2-5 are arranged on the outer side of the outer vertical rod 2-1-3 at intervals along the height direction, and the first positioning pins 2-5 correspond to the positioning pin holes 1-3 on the template. The steel structure back support 2 is perpendicular to the surface of the template when being installed, the arrangement distance is 60cm, and the steel structure back support 2 is connected with the positioning pin holes 1-3 on the template through the first positioning pins 2-5 on the outer vertical rods 2-1-3. In order to keep the back-up system perpendicular to the face of the formwork and prevent twisting, the first positioning pins 2-5 are preferably square in cross-section.
And the upper cross rod 2-1-1 is provided with a positioning pin hole 2-8 corresponding to the outer support leg 2-3. According to the concrete pipe diameter size of laying, when adopting individual layer steel construction back shore 2 to support, the screw rod of outer landing leg can stretch into in the bed course and regard as the anchor location muscle of template. When the double-layer steel structure back support 2 is adopted for supporting, the outer leg screw of the upper layer back support 2 can extend into the positioning pin hole on the upper cross bar of the lower layer steel structure back support 2 to connect and fix the upper and lower layers of steel structure back supports 2.
The standard design working height of the steel skeleton 2-1 is 48cm, wherein the height of the upright is 42cm, and the height of the support legs is 6 cm. The length of the lower cross rod in the width direction is 20cm, the length of the upper cross rod is 40cm, the adjusting length of the back-up screw rod is 0-30 cm, and the designed working width is 40-70 cm. The operation width of concrete pipeline laying construction both sides is 50 ~ 90cm generally, considers template and stiffening rib thickness, can satisfy the operation requirement basically. For the case that the width of each groove exceeds the stroke of the screw, a square wood block with 10cm or 15cm between the backing plate and the steel sheet pile enclosure can be supported.
The connecting flower shelf 3 is of a rectangular frame structure, the connecting flower shelf 3 is welded into a rectangular frame by adopting L40 x 40 x 3mm equilateral angle steel, and two crossed oblique rods are arranged in the rectangular frame. The connecting pergola 3 is about 52cm in length and 30cm in width. Two second positioning pins 3-1 are fixedly connected to two short edges of the connecting flower shelf 3 respectively, and the two second positioning pins 3-1 correspond to two positioning pin holes 2-9 arranged on the inner vertical rods 2-1-4. The connecting flower shelf 3 is used for connecting two adjacent steel frameworks 2-1, so that the template 1, the steel frameworks 2-1, the connecting flower shelf 3 and the anchoring ribs form a stable spatial integral structure. When the connecting flower shelf 3 is installed, the connecting flower shelf is arranged in a vertical plane perpendicular to the steel skeleton 2-1, and the second positioning pin 3-1 is directly penetrated into the corresponding positioning pin hole 2-9 on the steel skeleton to realize connection. The connecting flower shelf 3 is equal to the top surface of the steel framework after being installed, and the pedal 5 erected on the upper part is kept stable.
The pedal 5 is of a rectangular structure, is designed to be light, and is made of aluminum alloy or galvanized steel sheets. The four corners of the pedal 5 are provided with connecting holes which correspond to the connecting holes 2-8 reserved on the upper cross rod 2-1-1. During installation, the pedal 5 is directly erected on the upper cross rod of the steel structure back support 2, and is fixed with the steel structure back support through the reserved connecting holes of the pedal and the steel structure back support. The span of the footplate is not more than 60cm, and the connecting flower stand 3 can support the long edge of the footplate 5, so the steadiness of the footplate is good.
The outer supporting leg, the inner supporting leg and the back-up screw rod can penetrate into corresponding positioning holes of the section steel framework in advance, are integrally used with the section steel framework, are more convenient to transport, mount and dismount, and save labor cost. If the damage and the deformation exist, the disassembly and the replacement can be conveniently carried out.
The standardized formwork system of the present invention is configured as above, and when the standardized formwork system is used for concrete pipeline construction, the construction method comprises the following construction steps:
firstly, after the pouring of cushion concrete is finished and the allowable strength is reached, measuring and setting off, and positioning a pipeline laying center line and a pipeline foundation concrete side line;
secondly, concrete pipelines are paved section by section, the length of each pipeline is 2m, and matched rubber gaskets are stuffed between the pipe sections;
thirdly, positioning the position of each anchoring rib on the concrete cushion layer according to the measurement paying-off, and vertically drilling downwards at an anchoring point by adopting a handheld impact drill, wherein the drilling depth is about 10 cm;
and (IV) erecting the mold according to the positioning line of the template, then installing the steel structure back support 2 on the back side of the template, arranging two vertical steel structure back supports 2 behind each template, wherein the distance between the two steel structure back supports 2 is 0.6m, the two steel structure back supports 2 are both positioned at 1/4 length positions of the template, and each steel structure back support 2 is arranged perpendicular to the template and is connected with the positioning pin hole in the template through a first positioning pin 2-5. When the inspection well exists, the template is installed towards the other end of the pipeline immediately after the inspection well exists, and when the inspection well does not exist, the template is installed from one end of the pipeline to the other end of the pipeline; when the template is installed to the last template, selecting a B-type or C-type adjusting template for extension adjustment according to the actual measured length;
fifthly, adjusting the inner support leg 2-4, the outer support leg 2-5 and the back support screw 2-2 of the steel structure back support 2 to proper lengths to enable the back support screw 2-2 to tightly support the enclosed steel sheet pile 8, then erecting a connecting flower shelf 3 between the steel structure back supports 2, and connecting the connecting flower shelf 3 with a positioning pin hole on an inner vertical rod 2-1-4 of the steel structure back support 2 through a second positioning pin 3-1;
sixthly, after the connection flower shelf 3 is erected, a pedal 5 is laid, the pedal 5 is laid on the upper cross rod 2-1-1 of the steel skeleton 2-1, and connecting holes at four corners of the pedal 5 are aligned with connecting holes on the upper cross rod 2-1-1 of the steel skeleton 2-1 and are fixedly connected through bolts;
(7) after the first template unit is assembled, sequentially assembling the other template units;
(8) and after the template is installed and fixed, pouring pipeline foundation encapsulation concrete.
In the invention, all the components are connected by positioning pins or positioning bolts, so that the installation, the disassembly and the connection are simple, convenient and quick. All components are standard parts. In the construction process, the panel of the template and the concrete pipeline are positioned by filling the triangular wood wedges.
Considering that the thicknesses of foundation encapsulation concrete with different pipe diameters are different, when a standard template is adopted, the size of the template is not matched with that of a steel structure back support, so that the standardized template system further comprises an inclined support rod 4, the inclined support rod 4 is formed by processing round steel with the diameter of 25mm, and connecting pin holes are formed in two ends of the inclined support rod 4, so that the inclined support rod can be quickly connected and installed. When the steel structure back support is used, one end of the inclined support rod 4 props against the template, and the other end of the inclined support rod is fixed on the ground anchoring rib or the steel structure back support. The diagonal stay 4 is used in the following cases: firstly, when the pipe diameter is 400mm, a 2-type template is directly adopted, namely the vertical mold height of the template is 0.32m, the template is supported by inclined support rods 4 matched with ground anchor bars, and a steel structure back support 2 is not needed. Secondly, when the pipe diameter is 1000mm, the thickness of the corresponding basic encapsulation concrete is 0.8m, a 1-type template and a 3-type template are combined, the height of the template is 0.8m, a single-layer steel structure back support 2 is adopted at the back, and a part of the template with the upper height of 0.32m needs to be supported by an inclined support rod 4. Thirdly, when the pipe diameter is 1500mm, the thickness of the corresponding basic encapsulation concrete is 1.2m, two 1-type templates are combined, the height of each template is 1.28m, a double-layer steel structure back support 2 is adopted behind the template, and a part with the upper part height of 0.32m of the template needs to be supported by an inclined support rod 4.
Because the foundation encapsulation concrete thickness of different pipe diameters is different, need adopt different template combination and support form. The concrete thickness is encapsulated to the basis of different pipe diameters in basic common use, and the use combination mode of template and support is as follows:
| serial number | Inner diameter of pipeline | Thickness of foundation | Template number combination | Support combination |
| 1 | 400mm | 0.32 |
2 | |
| 2 | 600mm | 0.48 |
2+3 | Single-layer steel skeleton back support |
| 3 | 800mm | 0.64m | 1 | Single-layer steel skeleton back support |
| 4 | 1000mm | 0.8m | 1+3 | Single-layer steel skeleton back support and |
| 5 | 1200mm | 0.96m | 1+2 | Double-layer steel skeleton back |
| 6 | 1500mm | 1.2m | 1+1 | Double-layer steel skeleton back |
| 7 | 1800mm | 1.44m | 1+1+3 | Three-layer steel skeleton back support |
For the situation that the cantilever at the upper part of the template is small in height, the rigidity of the template body is directly utilized to resist concrete load, and inclined support rods are not used for supporting.
When the pipe diameter is large and the thickness of the foundation encapsulation concrete is large, a double-layer or three-layer steel structure back support 2 is adopted as a support, each template unit is constructed according to the sequence from bottom to top, and after the first layer of templates and the supports are installed, the second layer of templates and the supports are installed; and after the installation is finished, installing the next unit, and so on.
The invention adopts standardized and modularized sizing design, can carry out the allocation and combination of the templates aiming at the conditions of different pipe diameters, does not need to transform the templates on the construction site, has high installation and disassembly speed, and can quickly complete the disassembly and assembly only by matching two persons and utilizing simple tools such as a spanner and the like.
Other parts in this embodiment are the prior art, and are not described herein again.
Claims (7)
1. A municipal concrete drainage pipeline laying construction method is characterized in that: the method comprises the following steps of constructing by adopting a standardized template system, wherein the standardized template system comprises a template (1), a steel structure back support (2), a connecting flower stand (3) and a pedal (5), the template (1) is a rectangular template, the template (1) is an aluminum alloy template, the template (1) comprises a standard template and an adjusting template, and the four lateral sides and the back of the template are provided with positioning pin holes; the steel structure back support (2) comprises a steel skeleton (2-1), the steel skeleton (2-1) comprises an outer vertical rod (2-1-3) and an inner vertical rod (2-1-4) which are vertically arranged, the upper ends of the outer vertical rod (2-1-3) and the inner vertical rod (2-1-4) are connected with a horizontal upper cross rod (2-1-1), one end of the upper cross rod (2-1-1) close to the inner vertical rod (2-1-4) extends outwards, the lower ends of the outer vertical rod (2-1-3) and the inner vertical rod (2-1-4) are connected with a horizontal lower cross rod (2-1-2), an inclined rod (2-1-5) is fixedly connected between the extending end of the upper cross rod (2-1-1) and the lower end of the inner vertical rod (2-1-4), the end part of the extending end of the upper cross rod (2-1-1) is connected with an adjustable back-support screw rod (2-2), the lower end of the outer vertical rod (2-1-3) is connected with an adjustable outer supporting leg (2-3), the lower end of the inner vertical rod (2-1-4) is connected with an adjustable inner supporting leg (2-4), two first positioning pins (2-5) are arranged on the outer side of the outer vertical rod (2-1-3) at intervals along the height direction, the first positioning pins (2-5) correspond to positioning pin holes in the template, and the upper cross rod (2-1-1) is provided with positioning pin holes corresponding to the outer supporting legs (2-3); the connecting flower stand (3) is of a rectangular frame structure, two second positioning pins (3-1) are fixedly connected to two short sides of the connecting flower stand (3) respectively, and the second positioning pins (3-1) correspond to positioning pin holes formed in the inner vertical rods (2-1-4); the pedal (5) is of a rectangular structure, and connecting holes corresponding to the connecting holes arranged on the upper cross rod (2-1-1) are formed in the four corners of the pedal (5);
the method comprises the following construction steps:
firstly, after the pouring of cushion concrete is finished and the allowable strength is reached, measuring and setting off, and positioning a pipeline laying center line and a pipeline foundation concrete side line;
secondly, concrete pipelines are paved section by section, and matched rubber gaskets are stuffed between pipe sections;
thirdly, positioning the position of each anchoring rib on the concrete cushion layer according to the measurement paying-off, and vertically drilling downwards at an anchoring point by adopting a handheld impact drill;
fourthly, erecting the formwork according to a positioning line of the formwork, then installing steel structure back supports (2) on the back sides of the formworks, arranging two vertical steel structure back supports (2) behind each formwork, enabling the distance between the two steel structure back supports (2) to be 0.6m, enabling the two steel structure back supports (2) to be located at 1/4 length positions of the formwork, enabling each steel structure back support (2) to be perpendicular to the formworks and connected with positioning pin holes in the formworks through first positioning pins (2-5);
fifthly, after the inner supporting legs (2-4) and the outer supporting legs (2-5) of the steel structure back support (2) and the back support screw rods (2-2) are adjusted to be proper in length, connecting flower stands (3) are erected among the steel structure back support (2), and the connecting flower stands (3) are connected with positioning pin holes in the inner vertical rods (2-1-4) of the steel structure back support (2) through second positioning pins (3-1);
sixthly, paving a pedal (5) after the connection flower stand (3) is erected, wherein the pedal (5) is paved on an upper cross rod (2-1-1) of the steel skeleton (2-1), and connecting holes at four corners of the pedal (5) are aligned with connecting holes on the upper cross rod (2-1-1) of the steel skeleton (2-1) and are fixedly connected through bolts;
(7) after the first template unit is assembled, sequentially assembling the other template units;
(8) and after the template is installed and fixed, pouring pipeline foundation encapsulation concrete.
2. The municipal concrete drainage pipeline laying construction method according to claim 1, wherein: the cross section of the first positioning pin (2-5) is square.
3. The municipal concrete drainage pipeline laying construction method according to claim 1, wherein: the outer vertical rod (2-1-3), the inner vertical rod (2-1-4), the upper cross rod (2-1-1), the lower cross rod (2-1-2) and the diagonal rod (2-1-5) of the steel skeleton (2-1) are all channel steel.
4. The municipal concrete drainage pipeline laying construction method according to claim 1, wherein: the pedal (5) is made of aluminum alloy or galvanized steel sheet.
5. The municipal concrete drainage pipeline laying construction method according to claim 1, wherein: backing plates are arranged at the outer side end of the back support screw rod (2-2), the lower end of the screw rod of the inner supporting leg (2-4) and the screw rod of the outer supporting leg (2-3).
6. The municipal concrete drainage pipeline laying construction method according to claim 1, 2, 3, 4 or 5, wherein: when the pipe diameter is large and the thickness of foundation encapsulation concrete is large, a double-layer or three-layer steel structure back support (2) is used as a support, each template unit is constructed according to the sequence from bottom to top, and after the first layer of templates and the supports are installed, a second layer of templates and the supports are installed; and after the installation is finished, installing the next unit, and so on.
7. The municipal concrete drainage pipeline laying construction method according to claim 1, 2, 3, 4 or 5, wherein: the standardized template system further comprises an inclined strut (4), and connecting pin holes are formed in two ends of the inclined strut (4) respectively; when the size of the template is not matched with that of the steel structure back support (2), the upper end of the template is connected with the steel structure back support (2) through the inclined support rod (4) to support the template.
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