CN115748344A - Construction method for widening and filling large-particle-size building waste light embankment - Google Patents
Construction method for widening and filling large-particle-size building waste light embankment Download PDFInfo
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- CN115748344A CN115748344A CN202211411646.XA CN202211411646A CN115748344A CN 115748344 A CN115748344 A CN 115748344A CN 202211411646 A CN202211411646 A CN 202211411646A CN 115748344 A CN115748344 A CN 115748344A
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Abstract
A construction method for widening and filling a large-particle-size building waste light embankment comprises the following construction steps: 1) Construction preparation; 2) Crushing waste; 3) Designing the mix proportion of the waste concrete light backfill body; 4) Treating the foundation of a roadbed widening area; 5) A side mould is supported; 6) And constructing the light backfilling body of the waste concrete. The method comprises the steps of crushing the waste concrete through the pressurizing device, performing auxiliary crushing through the second water sprayer, reducing dust on the surface of the waste concrete aggregate, and performing vibration screening on the waste concrete aggregate through the first aggregate screen, so that the accuracy of particle size control of the waste concrete aggregate is improved; the foundation of the widened area is made of a waste concrete light backfill body material, and an oblique reinforcement body is inserted, so that the bearing capacity of a foundation soil body is improved; the side surface of the widened area is provided with the assembled template, so that the problem of disassembling and assembling the mold is avoided, and the transverse position of the transverse tie bar is controlled through the tie bar adjusting bolt, so that the dynamic control of the transverse tie bar is realized.
Description
Technical Field
The invention relates to a roadbed widening construction method in road engineering.
Background
With the rapid development of Chinese economy, the highway transportation requirements of China are also improved year by year, the traffic volume of some existing roads is saturated, and the existing roads need to be widened and modified to improve the traffic capacity of the roads. Due to the complexity and uniqueness of road widening engineering, great differential settlement often exists between new and old roadbeds, so that serious longitudinal cracks appear on roads, and therefore, a light material is very necessary to be used as a new road base material, and research is carried out on the application of the light material in the old road widening engineering. There has been a highway subgrade widening structure among the prior art, a plurality of steps have been seted up to this structure in domatic one side of former subgrade, the inserting groove has all been seted up to the inboard of step, be provided with L shape steelframe on inserting groove and step, a first support steelframe of fixedly connected with between the adjacent L shape steelframe, be equipped with the second support frame between L shape steelframe that is close to ground and the ground, L shape steelframe one end is kept away from to the second support frame and is inserted and locate ground, the concrete filler material has been pour to the domatic of former subgrade, the concrete filler material is with L shape steelframe, first support steelframe, the whole covers of second support frame, former subgrade and concrete filler material keep away from ground one side and have laid road surface structure. Although the method can improve the connection strength between the original roadbed and the new roadbed, the problems of adverse effects and engineering cost possibly caused by the new roadbed filling material per se on construction are not considered in the construction process, and a certain lifting space exists in the aspect of improving the overall performance of the structure. In view of this, in order to improve the construction quality and efficiency of an embankment widening system, the invention of the construction method for widening and filling the light embankment with large-particle-size building wastes, which can improve the accuracy of controlling the particle size of waste concrete aggregates, reduce the dead weight of new roadbed fillers and improve the lateral stability of an embankment structure, is urgently needed.
Disclosure of Invention
The invention aims to provide a construction method for widening and filling a large-particle-size building waste light embankment, which overcomes the defects of poor transverse stability of an embankment structure and low accuracy of control over particle size of waste concrete aggregate in the prior road surface widening technology.
In order to achieve the purpose, the invention adopts the following technical scheme: a construction method for widening and filling a large-particle-size building waste light embankment comprises the following construction steps:
1) Construction preparation: determining the excavation position of the embankment step through site survey, and preparing materials and equipment required by construction;
2) Crushing waste: laying a pressurizing strut on the foundation soil body, and arranging a pressurizing device and a pressurizing plate which are opposite to the material crushing box on the lower surface of the pressurizing strut; arranging a bed-jig bottom plate on the upper surface of the foundation soil body, and arranging a bottom plate adjusting bolt and an adjustable supporting pier between the bed-jig bottom plate and the foundation soil body; along the height direction of the material crushing box, a first supporting beam, a second supporting beam, a first aggregate screen, a material discharging slideway and a water discharging slideway are sequentially arranged in the material crushing box from top to bottom; reserving a second discharge hole at the position of the second supporting beam, the first aggregate screen, the discharge slideway and the drainage slideway opposite to the material crushing box; arranging a first cutting blade and a first limiting side plate on a first supporting cross beam, and symmetrically arranging first water sprayers on the side wall of a material crushing box at the upper part of the first supporting cross beam in a mirror mode; a second cutting blade and a second limiting side plate are arranged on a second supporting beam, second water sprayers are arranged on the side wall of the material crushing box between the second supporting beam and the first supporting beam in a mirror symmetry mode, and then a first discharging plate is arranged at a second discharging hole in the outer side of the second supporting beam; a blade connecting rod is arranged on the lower surface of a slidable blade in the second cutting blade, one end of the blade connecting rod is connected with the slidable blade, the other end of the blade connecting rod is connected with a blade sliding plate, and a blade sliding groove for the sliding of the blade sliding plate is arranged on the outer side of the blade sliding plate; the lower surface of the blade sliding plate is provided with blade connecting tenons, different blade connecting tenons are connected through a sliding connecting rod, a positioning bolt is arranged at the end part of one side, close to the second discharge hole, of the sliding connecting rod, and the sliding connecting rod is controlled to slide left and right through the positioning bolt; arranging a vibration support at the contact part of the lower surface of the first aggregate screen and the material crushing box, arranging a second discharge plate at a second discharge hole on the outer side of the first aggregate screen, and then arranging a first aggregate recovery tank at the terminal of the second discharge plate; arranging a third discharge hole on the surface of the discharge slideway, close to the second discharge hole, arranging a third discharge plate at the second discharge hole on the outer side of the discharge slideway, and then arranging a second aggregate recovery tank at the terminal of the third discharge plate; a material collecting guide plate is arranged on the side wall of the material crushing box between the first material collecting screen and the material discharging slide way; a fourth discharging plate is arranged at a second discharging hole on the outer side of the discharging slideway, and a wastewater recovery tank is arranged at the terminal of the fourth discharging plate;
3) The mix proportion design of the waste concrete light backfill body is as follows: the mix proportion design of the waste concrete light backfill body comprises the steps of waste concrete aggregate pretreatment, foam concrete slurry preparation, waste concrete light backfill body test block pouring, selection of five types of aggregates with the particle size ranges of 9.5-16 mm, 16-19 mm, 19-26.5 mm, 26.5-31.5 mm and 31.5-37.5 mm from a second aggregate recovery tank, and weighing of waste concrete aggregates with the volume ratio of 20-30% of waste concrete aggregate is treated by pre-soaking; forming a stable foam in a foaming machine by using a foaming agent and test water in a ratio of 1; weighing 800-900 kg/m 3 The cement of (1) is weighed to be 440-495 kg/m 3 The cement and the test water are poured into a mortar stirrer to be stirred for 3 to 4 minutes, and then 1.6 to 1.8kg/m of the cement and the test water are weighed 3 The polypropylene fiber is poured into a mortar stirrer, continuously stirred for 3 to 4 minutes, and then 40 to 45kg/m 3 Pouring the stable foam into a mortar stirrer, and stirring for 2-3 minutes to form foam concrete slurry for later use; pouring in three layers, wherein the pouring heights are respectively 2/5, 2/5 and 1/5 of the height of the test block mold, pouring foam concrete slurry into the test block mold with the size of 150 mm × 150 mm × 150 mm to a set height, uniformly scattering waste concrete aggregate into the test block mold, making the waste concrete aggregate sink under the action of self weight until the volume is unchanged, and pouring the waste concrete light backfill body test block according to the steps; covering the waste concrete light backfill body test block by using a film, curing for 24 hours at the temperature of 20 +/-1 ℃ indoors, then demolding, and putting into a constant-temperature water tank for curing for 28 days;
4) And (3) foundation treatment of a roadbed widening area: digging a widened area foundation on a foundation soil body, leading holes from the widened area to the widened area foundation, and inserting oblique reinforcement bodies; a side die foundation is arranged in the widened area foundation, a side die supporting plate is arranged at the connecting position of the top of the side die foundation and the side die template, and the side die supporting plate is firmly connected with the side die foundation and the widened area foundation through inserting joint ribs;
5) And (3) supporting a side die: arranging a side die template on the upper part of a side die supporting plate, arranging a tie bar sliding groove on the inner side wall of the side die template, and arranging a tie bar sliding plate capable of sliding along the tie bar sliding groove in the tie bar sliding groove; a side die tie bar is arranged between the side die template and the widened area foundation, and the bottom end of the side die tie bar is firmly connected with the widened area foundation through a tie bar bottom plate; arranging transverse tie bars on the steps of the embankment, wherein one ends of the transverse tie bars are anchored on the old roadbed soil body, the other ends of the transverse tie bars are connected with the connecting bars of the sliding plate through tie bar adjusting bolts, and the positions of the transverse tie bars are controlled through the tie bar adjusting bolts; vertical clamping plates are arranged between the transverse tie bars on the same vertical plane, and the vertical clamping plates are firmly connected with the transverse tie bars through clamping plate connecting grooves and clamping plate connecting bars; an oblique lacing wire is arranged between the vertical clamping plate and the old roadbed soil body, and a clamping plate anchor pier is arranged at the joint position of the bottom end of the oblique lacing wire and the old roadbed soil body;
6) Construction of a light backfill body of the waste concrete: firstly, pouring 70-80 mm of foam concrete slurry above a foundation of a widened area, and then uniformly scattering waste concrete aggregate with the volume ratio of 20-30% within 0-1 hour; after the volume of the first layer of the waste concrete light backfilling body is stable, sequentially pouring foam concrete slurry and waste concrete aggregate from bottom to top, repeating the operation, wherein the pouring height is 0.8-1 m, then inserting built-in connecting ribs on the surface of the waste concrete light backfilling body, standing for 12-24 hours, and after the waste concrete light backfilling body is initially set, continuing pouring until the pouring is finished; covering a water-retaining geomembrane on the top after the initial setting of the light backfilled body of the waste concrete; and arranging an upper sealing layer on the uppermost surface of the waste concrete light backfilling body.
Further, the pressurizing strut in the step 2) is formed by rolling profile steel, and a screw hole connected with the pressurizing device is formed in the pressurizing strut; the pressurizing device is hydraulically pressurized, one end of the pressurizing device is connected with the pressurizing support frame in a welding mode, the other end of the pressurizing device is connected with the pressurizing plate through a screw hole, and the pressurizing plate is formed by rolling a steel plate; the first cutting blade consists of four fixed blades, is in a closed rectangular shape, and is firmly connected with the side wall of the material crushing box through a supporting cross beam; the second cutting blade comprises a slidable blade and three fixed blades, the slidable blade is connected with the blade sliding plate in a welding mode through a blade connecting rod, and the second cutting blade is connected with the blade sliding plate in a welding mode through a blade telescopic rod; the blade connecting falcon is T-shaped in cross section and is formed by rolling a steel plate, one end of the blade connecting falcon is connected with the blade sliding plate in a welding mode, and the other end of the blade connecting falcon is connected with the sliding connecting rod in a welding mode; the positioning bolt comprises a screw rod and a nut, and the fastening directions of the screw rods on the two sides of the nut are opposite; the first water sprayer adopts an energy-saving water sprayer, and the vertical inclination angle is 60-80 degrees; the second water sprayer is a high-strength water sprayer, is arranged on the side wall of the material crushing box in a mirror symmetry mode, has a vertical inclination angle of 40-60 degrees, and can realize secondary crushing of waste concrete aggregate between the second limiting side plates; the first limiting side plate and the second limiting side plate are formed by rolling steel plates, and a first discharging hole for aggregate to pass through is preset in the second limiting side plate; the first aggregate screen adopts 37.5mm mesh; the vibration support adopts mechanical vibration, is firmly connected with a support base plate through bolts, enables the support base plate to be welded with the side wall of the material crushing box, assists aggregate screening through the vibration support, and conveys aggregate with the particle size of more than 37.5mm to a first aggregate recovery tank through a first discharge plate; the discharging slideway is formed by rolling a steel plate, the aperture of a third discharging hole on the surface of the discharging slideway is 9.5mm, and aggregates with the particle size of more than 9.5mm are conveyed to a second aggregate recovery tank through a third discharging plate; the discharging slideway and the draining slideway are obliquely arranged downwards, the inclination angle is controlled to be 20-40 degrees, aggregate with the grain diameter smaller than 9.5mm and wastewater are conveyed to the wastewater recovery tank through the draining slideway, and a second aggregate screen for aggregate precipitation is arranged in the wastewater recovery tank.
Further, the waste concrete light backfilling body in the step 3) is prepared from waste concrete aggregate and foam concrete slurry; the foam concrete slurry is prepared from cement, test water, stable foam and polypropylene fibers; the cement is ordinary portland cement; the length of the polypropylene fiber is 12-19 mm; the foaming agent is a composite foaming agent, and the foaming times are more than 20 times; the waste concrete aggregate needs to be soaked in test water for 20-40 minutes, and then is taken out and drained until no clear water exists on the surface.
Further, the widened area foundation in the step 4) is made of light consolidated soil, and the cross section of the widened area foundation is rectangular; the oblique reinforcing body is formed by rolling a steel pipe or profile steel, and the horizontal inclination angle is controlled to be 50-70 degrees; the side mold foundation adopts a prefabricated pier body, and the cross section of the side mold foundation is trapezoidal; the side die supporting plate is formed by rolling a steel plate, the lower surface of the side die supporting plate is connected with the side die foundation and the widened area foundation through inserting ribs, and the upper surface of the side die supporting plate is connected with the side die template in a welding mode.
Further, the side die templates in the step 5) are made of precast concrete plates or steel plates, different side die templates are firmly connected through template connecting falcons with trapezoidal cross sections, the upper surfaces of the template connecting falcons are connected with the side die templates in a welding mode, the lower surfaces of the template connecting falcons are connected with the connecting falcon sliding plates through nuts, and connecting falcon sliding grooves for the connecting falcon sliding plates to slide are formed in the outer sides of the connecting falcon sliding plates; the side die lacing wire is formed by rolling a twisted steel bar or a screw; the vertical clamping plate is formed by rolling a steel plate, the clamping plate bottom plate is connected with the vertical clamping plate in a welding mode, and then the clamping plate bottom plate is firmly connected with the widened area foundation through the clamping plate anchor bars; the transverse tie bar is made of a threaded steel bar and is connected with the tie bar adjusting bolt through a screw hole; the height of the step of the embankment is 0.5-0.8 m, and the width of the step of the embankment is 1.5-2 m.
Further, the built-in connecting ribs in the step 6) adopt threaded steel bars, and connecting threads are arranged in the built-in connecting ribs; the upper sealing layer is formed by pouring concrete.
The invention has the beneficial effects that: according to the invention, the first cutting blade and the second cutting blade are sequentially arranged in the material crushing box from top to bottom along the height direction of the material crushing box, waste concrete is firstly crushed through the pressurizing device, and then the auxiliary crushing is carried out through the second water sprayer, so that the dust on the surface of the waste concrete aggregate can be reduced, and the environment is improved; meanwhile, the slidable blade can be controlled to slide left and right through the positioning bolt, and the waste concrete aggregate is subjected to vibration screening through the first aggregate screen, so that the accuracy of controlling the particle size of the waste concrete aggregate is improved; based on the waste concrete aggregate and the foam concrete slurry, the mixing proportion range of the waste concrete light backfill body is provided, so that the weight of the concrete material can be reduced; meanwhile, the stirring time, layered filling control and maintenance temperature are explained in the preparation process of the waste concrete light backfill body, so that the uniformity of material preparation can be improved; the foundation of the widened area is made of a waste concrete light backfill body material, and an oblique reinforcement body is inserted, so that the bearing capacity of a foundation soil body is improved; the side surface of the widened area is provided with the assembled template, so that the problem of disassembling and assembling the mold is avoided, and the transverse position of the transverse tie bar is controlled through the tie bar adjusting bolt, so that the dynamic control of the transverse tie bar is realized; meanwhile, the old roadbed soil body is firmly connected with the widened area through the transverse tie bars, the integrity between the transverse tie bars is enhanced through the vertical clamping plates and the clamping plate connecting bars, and the transverse stability of the embankment structure can be improved.
Drawings
FIG. 1 is a construction flow diagram of the method of the present invention;
FIG. 2 is a schematic view of an embankment widening configuration using the method of the present invention;
FIG. 3 is a schematic view of the construction of a waste concrete crushing apparatus used in the method of the present invention;
FIG. 4 is a flowchart of the steps for preparing a test block of a light backfill body of waste concrete;
FIG. 5 is a flow chart of construction of a light backfill body made of waste concrete;
FIG. 6 is a top view of the first cutting blade structure of FIG. 3;
FIG. 7 is a top view of the second cutting blade configuration of FIG. 3;
FIG. 8 is a schematic view of the slide mechanism of FIG. 3;
FIG. 9 is a schematic view of the vertical card structure of FIG. 2;
FIG. 10 is a schematic view of the side form panel of FIG. 2;
FIG. 11 is a schematic view of the connection layer structure of the waste concrete light backfill body of FIG. 2;
in the figure: 1-a foundation soil body; 2-a pressurizing support frame; 3-material crushing box; 4-a pressurizing device; 5-a compression plate; 6-bed jig bottom plate; 7-a bottom plate adjusting bolt; 8-adjustable supporting piers; 9-a first support beam; 10-a second supporting beam; 11-a first aggregate screen; 12-a discharge chute; 13-a drainage chute; 14-a second discharge aperture; 15-a first cutting blade; 16-a first limit side plate; 17-a first water sprayer; 18-a second cutting blade; 19-a second limit side plate; 20-side wall of material crushing box; 21-a second water sprayer; 22-a first discharge plate; 23-a slidable blade; 24-a blade connecting rod; 25-blade sled; 26-a blade runner; 27-blade connection falcon; 28-a sliding link; 29-positioning bolts; 30-a vibration support; 31-a second discharge plate; 32-a first aggregate recovery tank; 33-a third discharge hole; 34-a third discharge plate; 35-a second aggregate recovery tank; 36-an aggregate guide plate; 37-a fourth discharge plate; 38-a wastewater recovery tank; 39-fixing the blade; 40-blade telescoping rod; 41-first discharge hole; 42-a pedestal base plate; 43-second aggregate screen; 44-a light backfilling body made of waste concrete; 55-widened zone base; 56-oblique reinforcement body; 57-side form foundation; 58-side form template; 59-side gusset plate; 60-inserting joint ribs; 61-tie bar chute; 62-tie bar sliding plate; 63-stretching the side die; 64-lacing wire bottom plate; 65-embankment steps; 66-transverse tie bars; 67-old roadbed soil body; 68-tie bar adjusting bolt; 69-connecting ribs of the sliding plate; 70-vertical snap gauge; 71-card connecting slot; 72-snap-gauge connecting ribs; 73-oblique lacing wire; 74-cardboard anchor piers; 75-template connecting falcon; 76-connecting falcon slides; 77-connecting a falcon chute; 78-cardboard base plate; 79-cardboard anchor bars; 80-built-in connecting ribs; 81-water retention geomembrane; 82-upper sealing layer.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings:
a construction method for widening and filling a large-particle-size building waste light embankment comprises the following construction steps:
1) Construction preparation: determining the excavation position of the embankment steps 65 through site survey, and preparing materials and equipment required by construction;
2) Crushing waste: a pressurizing support frame 2 is arranged on a foundation soil body 1, and a pressurizing device 4 and a pressurizing plate 5 which are opposite to a material crushing box 3 are arranged on the lower surface of the pressurizing support frame 2; a bed-jig bottom plate 6 is arranged on the upper surface of the foundation soil body 1, and a bottom plate adjusting bolt 7 and an adjustable supporting pier 8 are arranged between the bed-jig bottom plate 6 and the foundation soil body 1; along the height direction of the material crushing box 3, a first supporting beam 9, a second supporting beam 10, a first aggregate screen 11, a discharge slideway 12 and a drainage slideway 13 are sequentially arranged in the material crushing box 3 from top to bottom; a second discharge hole 14 is reserved at the position of the second supporting beam 10, the first aggregate screen 11, the discharge slideway 12 and the drainage slideway 13 opposite to the material crushing box 3; a first cutting blade 15 and a first limiting side plate 16 are arranged on the first supporting beam 9, and first water sprayers 17 are arranged on the side wall 20 of the material crushing box on the upper portion of the first supporting beam 9 in a mirror symmetry mode; a second cutting blade 18 and a second limiting side plate 19 are arranged on the second supporting cross beam 10, second water sprayers 21 are arranged on the side wall 20 of the material crushing box between the second supporting cross beam 10 and the first supporting cross beam 9 in a mirror symmetry mode, and then a first discharging plate 22 is arranged at a second discharging hole 14 on the outer side of the second supporting cross beam 10; a blade connecting rod 24 is arranged on the lower surface of a slidable blade 23 in the second cutting blade 18, one end of the blade connecting rod 24 is connected with the slidable blade 23, the other end of the blade connecting rod 24 is connected with a blade sliding plate 25, and a blade sliding chute 26 for the sliding of the blade sliding plate is arranged on the outer side of the blade sliding plate 25; a blade connecting tenon 27 is arranged on the lower surface of the blade sliding plate 25, different blade connecting tenons 27 are connected through a sliding connecting rod 28, a positioning bolt 29 is arranged at the end part of the sliding connecting rod 28 close to one side of the second discharge hole 14, and the left and right sliding of the sliding connecting rod 28 is controlled through the positioning bolt 29; arranging a vibration support 30 at the contact part of the lower surface of the first aggregate screen 11 and the material crushing box 3, arranging a second discharge plate 31 at a second discharge hole 14 on the outer side of the first aggregate screen 11, and then arranging a first aggregate recovery tank 32 at the terminal of the second discharge plate 31; arranging a third discharge hole 33 on the surface of the discharge chute 12 close to the second discharge hole 14, arranging a third discharge plate 34 at the second discharge hole 14 outside the discharge chute 12, and then arranging a second aggregate recovery groove 35 at the terminal of the third discharge plate 34; an aggregate guide plate 36 is arranged on the side wall 20 of the material crushing box between the first aggregate screen 11 and the discharge chute 12; a fourth discharging plate 37 is arranged at the second discharging hole 14 outside the drainage slideway 13, and a wastewater recovery groove 38 is arranged at the terminal end of the fourth discharging plate 37;
3) The mix proportion design of the waste concrete light backfill body is as follows: the design of the mix proportion of the waste concrete light backfill body 44 comprises four stages of waste concrete aggregate pretreatment, foam concrete slurry preparation, waste concrete light backfill body 44 test block preparation and maintenance; selecting the waste concrete aggregate with the grain diameter range of 9.5-16 mm, 16-19 mm, 19-26.5 mm, 26.5-31.5 mm and 31.5-37.5 mm from the second aggregate recovery tank 35, wherein the mass ratio of the five types of aggregates is 2; forming a stable foam in a foaming machine by using a foaming agent and test water in a ratio of 1; weighing 800-900 kg/m 3 Cement of (2), re-weighingTaking 440-495 kg/m 3 The cement and the test water are poured into a mortar stirrer to be stirred for 3 to 4 minutes, and then 1.6 to 1.8kg/m of the cement and the test water are weighed 3 The polypropylene fiber is poured into a mortar stirrer, continuously stirred for 3 to 4 minutes, and then 40 to 45kg/m 3 Pouring the stable foam into a mortar stirrer, and stirring for 2-3 minutes to form foam concrete slurry for later use; pouring in three layers, wherein the pouring heights are respectively 2/5, 2/5 and 1/5 of the height of the test block mold, pouring foam concrete slurry into the test block mold with the size of 150 mm X150 mm X150 mm to a set height, then uniformly scattering waste concrete aggregate into the test block mold, so that the waste concrete aggregate sinks to a constant volume under the action of self weight, and pouring the test block of a waste concrete light backfill body 44 is finished according to the steps; covering the waste concrete light backfill body 44 test block by adopting a film, curing for 24 hours at the temperature of 20 +/-1 ℃ indoors, then demoulding, and putting into a constant-temperature water tank for curing for 28 days;
4) And (3) foundation treatment of a roadbed widening area: digging a widened area foundation 55 on the foundation soil body 1, leading holes from the widened area to the widened area foundation 55, and inserting an inclined reinforcement body 56; a side die foundation 57 is arranged in the widened area foundation 55, a side die supporting plate 59 is arranged at the joint of the top of the side die foundation 57 and the side die template 58, and the side die supporting plate 59 is firmly connected with the side die foundation 57 and the widened area foundation 55 through a joint rib 60;
5) And (3) supporting a side die: a side die plate 58 is arranged at the upper part of the side die supporting plate 59, a tie bar sliding groove 61 is arranged on the inner side wall of the side die plate 58, and a tie bar sliding plate 62 which can slide along the tie bar sliding groove is arranged in the tie bar sliding groove 61; a side die tie bar 63 is arranged between the side die template 58 and the widened area foundation 55, and the bottom end of the side die tie bar 63 is firmly connected with the widened area foundation 55 through a tie bar bottom plate 64; arranging a transverse tie bar 66 on the embankment step 65, wherein one end of the transverse tie bar 66 is anchored on an old roadbed soil body 67, the other end of the transverse tie bar 66 is connected with a sliding plate connecting bar 69 through a tie bar adjusting bolt 68, and the position of the transverse tie bar 66 is controlled through the tie bar adjusting bolt 68; vertical clamping plates 70 are arranged between the transverse tie bars 66 on the same vertical plane, and the vertical clamping plates 70 are firmly connected with the transverse tie bars 66 through clamping plate connecting grooves 71 and clamping plate connecting bars 72; an oblique lacing wire 73 is arranged between the vertical clamping plate 70 and the old roadbed soil body 67, and a clamping plate anchor pier 74 is arranged at the connecting part of the bottom end of the oblique lacing wire 73 and the old roadbed soil body 67;
6) Construction of a light backfill body of the waste concrete: firstly, pouring 70-80 mm foam concrete slurry above a widened area foundation 55, and then uniformly scattering waste concrete aggregate with the volume ratio of 20-30% within 0-1 hour; after the volume of the first layer of the waste concrete light backfilling body 44 is stable, sequentially pouring foam concrete slurry and waste concrete aggregate from bottom to top, repeating the operations, wherein the pouring height is 0.8-1 m, then inserting the built-in connecting rib 80 into the surface of the waste concrete light backfilling body 44, standing for 12-24 hours, and after the waste concrete light backfilling body 44 is initially set, continuously pouring until the pouring is finished; covering a water-retaining geomembrane 81 on the top after the light backfilling body 44 of the waste concrete is initially set; an upper seal 82 is provided on the uppermost surface of the lightweight backfill 44 of waste concrete.
Preferably, a first cutting blade 15 and a second cutting blade 18 are sequentially arranged inside the material crushing box 3 from top to bottom along the height direction of the material crushing box 3, waste concrete is firstly crushed by the pressurizing device 4, and then the auxiliary crushing is carried out by the second water sprayer 21; controlling the left-right sliding of the slidable blade 23 through the positioning bolt 29, and performing vibratory screening on the waste concrete aggregate through the first aggregate screen 11; on the basis of the waste concrete aggregate and the foam concrete slurry, the mixing proportion range of the waste concrete light backfilling body 44 is provided, and the stirring time, the layered filling control and the curing temperature of the preparation process of the waste concrete light backfilling body 44 are explained; adopting a waste concrete light backfill body material on the widened area foundation 55, adopting an assembly type template on the side surface of the widened area, and then controlling the transverse position of the transverse tie bar 66 through a tie bar adjusting bolt 68; the old roadbed soil 67 is firmly connected with the widened area through the transverse tie bars 66, and the integrity between the transverse tie bars 66 is enhanced through the vertical clamping plates 70 and the clamping plate connecting bars 72.
The foundation soil body 1 is cohesive soil in a hard plastic state. The pressurizing bracket 2 is formed by rolling section steel with the specification of 200 multiplied by 8 multiplied by 12, and a screw hole connected with the pressurizing device 4 is arranged on the pressurizing bracket 2; the pressurizing device 4 is pressurized by hydraulic pressure, one end of the pressurizing device is connected with the pressurizing support frame 2 in a welding mode, the other end of the pressurizing device is connected with the pressurizing plate 5 through a screw hole, and the pressurizing plate 5 is formed by rolling a steel plate with the thickness of 20 mm.
The material crushing box 3 comprises a material crushing box side wall 20 which is cuboid, the width of the material crushing box is 1.5m, and the height of the material crushing box is 2m; the side wall 20 of the material crushing box is formed by rolling a steel plate with the thickness of 10 mm.
The bed-jig bottom plate 6 is formed by rolling a steel plate with the thickness of 10 mm.
The bottom plate adjusting bolt 7 comprises a steel pipe screw rod with the diameter of 60mm and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite.
The adjustable support pier 8 is formed by rolling a steel plate with the thickness of 10 mm.
The first supporting beam 9 and the second supporting beam 10 both adopt H-shaped steel with the specification of 100 multiplied by 6 multiplied by 8.
The first aggregate screen 11 is a high manganese steel screen, and the aperture is controlled to be 9.5mm.
The discharging slideway 12 is formed by rolling a steel plate with the thickness of 10mm, is obliquely arranged downwards at an inclination angle of 30 degrees, and a third discharging hole 33 on the surface of the discharging slideway 12 is 9.5mm in aperture and conveys aggregates with the particle size of more than 9.5mm to a second aggregate recovery tank 35 through a third discharging plate 34; the third discharging plate 34 is formed by rolling a steel plate with the thickness of 10 mm; the second aggregate recycling groove 35 is formed by rolling a steel plate with the thickness of 2mm, the cross section of the second aggregate recycling groove is rectangular, the depth of the second aggregate recycling groove is 0.8m, and the width of the second aggregate recycling groove is 0.3m.
The drainage slideway 13 is obliquely arranged downwards, the inclination angle is 30 degrees, aggregate with the grain diameter smaller than 9.5mm and wastewater are conveyed to the wastewater recovery tank 38 through the drainage slideway 13, and a second aggregate screen 43 for aggregate precipitation is arranged in the wastewater recovery tank 38; the wastewater recovery tank 38 is formed by rolling a steel plate with the thickness of 2mm, the depth is 0.6m, and the width is 0.3m; the second aggregate screen 43 is a punching screen with the aperture of 2.36mm.
The second discharge hole 14 has a rectangular cross section and a height of 75mm.
The first cutting blade 15 is composed of four fixed blades 39, and has a closed rectangular shape; the fixed blade 39 is rolled from a steel plate having a thickness of 5mm.
The first limiting side plate 16 and the second limiting side plate 19 are both formed by rolling steel plates with the thickness of 10mm, the cross sections of the first limiting side plate and the second limiting side plate are both trapezoidal, and a first discharging hole 41 for aggregate to pass through is preset in the second limiting side plate 19; the first discharge hole 41 is a circular discharge hole having a diameter of 75mm.
The first water sprayer 17 adopts an energy-saving water sprayer, and the vertical inclination angle is 70 degrees.
The second cutting blade 18 comprises a slidable blade 23 and three fixed blades 39, the slidable blade 23 is connected with the blade sliding plate 25 through the blade connecting rod 24 in a welding mode, and the second cutting blade 18 is connected with the blade telescopic rod 40 in a welding mode; the slidable blade 23 is formed by rolling a steel plate with the thickness of 5 mm; the blade connecting rod 24 is formed by rolling a steel pipe with the diameter of 100 mm; the blade sliding plate 25 is formed by rolling a steel plate with the thickness of 10mm, and has the width of 20cm and the length of 10cm.
The second water sprayer 21 is a high-strength water sprayer, is arranged on the side wall 20 of the material crushing box in a mirror symmetry mode, and has a vertical inclination angle of 60 degrees.
The first discharging plate 22 is formed by rolling a steel plate with the thickness of 10 mm.
The blade sliding groove 26 is T-shaped in cross section and is formed by rolling a steel plate with the thickness of 3mm, the length of the blade sliding groove is 5cm, and the width of the blade sliding groove is 10cm.
The blade connecting falcon 27 is T-shaped in cross section and is formed by rolling a steel plate with the thickness of 3mm, the length of the blade connecting falcon is 5cm, the width of the blade connecting falcon is 10cm, one end of the blade connecting falcon is welded with the blade sliding plate 25, and the other end of the blade connecting falcon is welded with the sliding connecting rod 28; the sliding connecting rod 28 is formed by rolling a screw rod with the diameter of 60 mm.
The positioning bolt 29 comprises a screw rod and a nut with the diameter of 30mm, and the fastening directions of the screw rods on the two sides of the nut are opposite.
The vibration support 30 adopts mechanical vibration, is firmly connected with the support bottom plate 42 through bolts, ensures that the support bottom plate 42 is welded with the side wall 20 of the material crushing box, assists aggregate sieving through the vibration support 30, and conveys the aggregate with the particle size of more than 37.5mm to the first aggregate recovery tank 32 through the first discharge plate 22; the first aggregate recycling groove 32 is formed by rolling a steel plate with the thickness of 2mm, the cross section of the first aggregate recycling groove is rectangular, the depth of the first aggregate recycling groove is 1.2m, and the width of the first aggregate recycling groove is 0.3m; the support base plate 42 is formed by rolling a steel plate with a thickness of 10 mm.
The second discharging plate 31 is formed by rolling a steel plate with the thickness of 20 mm.
The aggregate guide plate 36 is made of a PVC plate.
The fourth discharging plate 37 is formed by rolling a steel plate with the thickness of 10 mm.
The blade extension rod 40 is formed by rolling a steel plate with the thickness of 20 mm.
The waste concrete lightweight backfill body 44 is prepared from waste concrete aggregate and foam concrete slurry; the weight ratio of five types of aggregates of the waste concrete with the particle size range of 9.5-16 mm, 16-19 mm, 19-26.5 mm, 26.5-31.5 mm and 31.5-37.5 mm is 2 3 Soaking in test water for 30 minutes, taking out and draining until no clear water exists on the surface; the foam concrete slurry is prepared from cement, test water, stable foam and polypropylene fiber; the test water adopts tap water; the 1-hour bleeding rate of the stable foam is 74 ml; the cement is 42.5 common Portland cement; the polypropylene fiber has a length of 19mm and a specific gravity of 0.91g/cm 3 The elastic modulus is 4125MPa, and the ultimate tensile rate is 24%.
Forming stable foam by a foaming agent and test water in a foaming machine according to the ratio of 1; the foaming agent is a composite foaming agent, and the dilution ratio of the composite foaming agent to water is 1:50, the foaming ratio is 21 times; the foaming machine adopts a full-automatic cement foaming machine.
The mortar mixer adopts a forced single-horizontal concrete mixer.
The test block mold is in a square shape and has the size of 150 mm × 150 mm × 150 mm.
The widened area foundation 55 is made of a waste concrete light backfill body material, and the cross section of the widened area foundation is rectangular.
The oblique reinforcing body 56 is formed by rolling a steel plate with the thickness of 20mm, and the horizontal inclination angle is 60 degrees.
The side form foundation 57 is a prefabricated pier body formed by pouring concrete with the strength grade of C30, and the cross section of the prefabricated pier body is trapezoidal.
The side die plates 58 are formed by rolling steel plates with the thickness of 4mm, and the different side die plates 58 are firmly connected through the die plate connecting falcon 75 with the trapezoidal cross section; the template connecting falcon 75 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the template connecting falcon is T-shaped, and the width of the template connecting falcon is 8cm.
The side die supporting plate 59 is formed by rolling a steel plate with the thickness of 10mm, the lower surface of the side die supporting plate 59 is connected with the side die foundation 57 and the widened area foundation 55 through the inserting ribs 60, and the upper surface of the side die supporting plate is connected with the side die template 58 in a welding mode; the socket ribs 60 are made of steel pipes with the diameter of 60 mm.
The height of the lacing wire sliding groove 61 is 12mm, and the width is 10cm.
The tie bar sliding plate 62 is formed by rolling a steel plate with the thickness of 10 mm.
The side die lacing wires 63 adopt prestressed screws with the diameter of 30 mm.
The lacing wire base plate 64 is formed by rolling a steel plate with the thickness of 10 mm.
The embankment steps 65 are 0.8m high and 2m wide.
The transverse tie bar 66 adopts a threaded steel bar with the thickness of 25mm and is connected with the tie bar adjusting bolt 68 through a screw hole; the tie bar adjusting bolt 68 comprises a steel pipe screw rod with the diameter of 30mm and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite.
The old roadbed soil body 67 is cohesive soil in a hard plastic state.
The slide plate connecting rib 69 is formed by rolling a steel pipe with the diameter of 60 mm.
The vertical clamping plate 70 is formed by rolling a steel plate with the thickness of 10mm, the clamping plate bottom plate 78 is connected with the vertical clamping plate 70 in a welding mode, and then the clamping plate bottom plate 78 is firmly connected with the widened area foundation 55 through the clamping plate anchor bars 79; the clamping plate bottom plate 78 is formed by rolling a steel plate with the thickness of 2mm, and the clamping plate anchor bars 79 are screw rods with the diameter of 30 mm.
The cardboard connecting groove 71 is rectangular in cross section, 10cm in depth and 10cm in width.
The clamping plate connecting rib 72 is formed by rolling a steel pipe with the diameter of 60 mm.
The diagonal lacing wire 73 is a prestressed screw rod with a diameter of 30 mm.
The clamp plate anchor pier 74 is formed by pouring reinforced concrete materials, and the strength grade of the concrete is C30.
Connecting falcon slide plate 76 is rolled from a steel plate having a thickness of 10 mm.
The connecting falcon sliding grooves 77 have a depth of 10mm and a length of 5cm.
The built-in connecting ribs 80 are formed by rolling steel pipes with the diameter of 300 mm.
The water-retaining geomembrane 81 is a waterproof geomembrane with the thickness of 2 mm.
The upper sealing layer 82 is made of concrete with the strength grade of C30.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications, which are equivalent in performance or use, without departing from the inventive concept, should be considered to fall within the scope of protection determined by the claims as filed.
Claims (6)
1. A construction method for widening and filling a large-particle-size building waste light embankment is characterized by comprising the following steps of: the method comprises the following construction steps:
1) Construction preparation: determining the excavation position of an embankment step (65) by site survey, and preparing materials and equipment required by construction;
2) Crushing waste: a pressurizing support frame (2) is arranged on a foundation soil body 1), and a pressurizing device (4) and a pressurizing plate (5) which are opposite to the material crushing box (3) are arranged on the lower surface of the pressurizing support frame (2); a bed-jig bottom plate (6) is arranged on the upper surface of the foundation soil body (1), and a bottom plate adjusting bolt (7) and an adjustable supporting pier (8) are arranged between the bed-jig bottom plate (6) and the foundation soil body (1); along the height direction of the material crushing box (3), a first supporting cross beam (9), a second supporting cross beam (10), a first aggregate screen (11), a discharge slideway (12) and a drainage slideway (13) are sequentially arranged in the material crushing box (3) from top to bottom; a second discharge hole (14) is reserved in the position, opposite to the material crushing box (3), of the second supporting cross beam (10), the first aggregate screen (11), the discharge slideway (12) and the drainage slideway (13); a first cutting blade (15) and a first limiting side plate (16) are arranged on a first supporting beam (9), and first water sprayers (17) are distributed on the side wall (20) of the material crushing box on the upper portion of the first supporting beam (9) in a mirror symmetry mode; a second cutting blade (18) and a second limiting side plate (19) are arranged on a second supporting cross beam (10), second water sprayers (21) are arranged on the side wall (20) of the material crushing box between the second supporting cross beam (10) and the first supporting cross beam (9) in a mirror symmetry mode, and then a first discharging plate (22) is arranged at a second discharging hole (14) on the outer side of the second supporting cross beam (10); a blade connecting rod (24) is arranged on the lower surface of a slidable blade (23) in the second cutting blade (18), one end of the blade connecting rod (24) is connected with the slidable blade (23), the other end of the blade connecting rod is connected with a blade sliding plate (25), and a blade sliding groove (26) for the blade sliding plate (25) to slide is arranged on the outer side of the blade sliding plate (25); the lower surface of the blade sliding plate (25) is provided with blade connecting tenons (27), different blade connecting tenons (27) are connected through a sliding connecting rod (28), the end part of the sliding connecting rod (28) close to one side of the second discharging hole (14) is provided with a position adjusting bolt (29), and the position adjusting bolt (29) is used for controlling the sliding of the sliding connecting rod (28) to the left and the right; a vibration support (30) is arranged at the contact part of the lower surface of the first aggregate screen (11) and the material crushing box (3), a second discharge plate (31) is arranged at a second discharge hole (14) at the outer side of the first aggregate screen (11), and then a first aggregate recovery tank (32) is arranged at the terminal of the second discharge plate (31); arranging a third discharge hole (33) on the surface of the discharge slideway (12) close to the second discharge hole (14), arranging a third discharge plate (34) at the second discharge hole (14) outside the discharge slideway (12), and then arranging a second aggregate recovery tank (35) at the terminal of the third discharge plate (34); a material collecting guide plate (36) is arranged on the side wall (20) of the material crushing box between the first material collecting screen (11) and the material discharging slide way (12); a fourth discharging plate (37) is arranged at the second discharging hole (14) on the outer side of the drainage slideway (13), and a wastewater recovery tank (38) is arranged at the terminal end of the fourth discharging plate (37);
3）the mix proportion design of the waste concrete light backfill body is as follows: the mix proportion design of the waste concrete lightweight backfill body (44) comprises waste concrete aggregate pretreatment, foam concrete slurry preparation, waste concrete lightweight backfill body (44) test block pouring, wherein five types of aggregates with the particle size range of 9.5-16 mm, 16-19 mm, 19-26.5 mm, 26.5-31.5 mm and 31.5-37.5 mm are selected from a second aggregate recovery tank (35), the mass ratio of the following five types of aggregates is 2; forming a stable foam in a foaming machine by using a foaming agent and test water in a ratio of 1; weighing 800-900 kg/m 3 The cement of (1) is weighed to 440-495 kg/m 3 The cement and the test water are poured into a mortar stirrer to be stirred for 3 to 4 minutes, and then 1.6 to 1.8kg/m of the cement and the test water are weighed 3 The polypropylene fiber is poured into a mortar stirrer, continuously stirred for 3 to 4 minutes, and then 40 to 45kg/m 3 Pouring the stable foam into a mortar stirrer, and stirring for 2-3 minutes to form foam concrete slurry for later use; pouring in three layers, wherein the pouring heights are respectively 2/5, 2/5 and 1/5 of the height of the test block mold, pouring foam concrete slurry into the test block mold with the size of 150 mm × 150 mm × 150 mm to a set height, uniformly scattering waste concrete aggregate into the test block mold, making the waste concrete aggregate sink under the action of self weight until the volume is unchanged, and pouring the waste concrete light backfill body (44) test block according to the steps; covering the test block of the waste concrete light backfill body (44) by using a film, curing for 24 hours at the temperature of 20 +/-1 ℃ indoors, then demolding, and putting into a constant-temperature water tank for curing for 28 days;
4) And (3) foundation treatment of a roadbed widening area: digging a widened area foundation (55) in a foundation soil body (1), leading holes from a widened area to the widened area foundation (55), and inserting oblique reinforcement bodies (56); a side die foundation (57) is arranged in the widened area foundation (55), a side die supporting plate (59) is arranged at the joint of the top of the side die foundation (57) and the side die template (58), and the side die supporting plate (59) is firmly connected with the side die foundation (57) and the widened area foundation (55) through a joint rib (60);
5) And (3) supporting a side die: a side die template (58) is arranged at the upper part of the side die supporting plate (59), a lacing wire sliding groove (61) is arranged on the inner side wall of the side die template (58), and then a lacing wire sliding plate (62) which can slide along the lacing wire sliding groove (61) is arranged in the lacing wire sliding groove (61); a side die tie bar (63) is arranged between the side die template (58) and the widened area foundation (55), and the bottom end of the side die tie bar (63) is firmly connected with the widened area foundation (55) through a tie bar bottom plate (64); arranging a transverse tie bar (66) on the embankment step (65), wherein one end of the transverse tie bar (66) is anchored on an old roadbed soil body (67), the other end of the transverse tie bar (66) is connected with a sliding plate connecting bar (69) through a tie bar adjusting bolt (68), and the position of the transverse tie bar (66) is controlled through the tie bar adjusting bolt (68); vertical clamping plates (70) are arranged between the transverse tie bars (66) on the same vertical plane, and the vertical clamping plates (70) are firmly connected with the transverse tie bars (66) through clamping plate connecting grooves (71) and clamping plate connecting ribs (72); an oblique lacing wire (73) is arranged between the vertical clamping plate (70) and the old roadbed soil body (67), and a clamping plate anchor pier (74) is arranged at the connecting part of the bottom end of the oblique lacing wire (73) and the old roadbed soil body (67);
6) Construction of a light backfill body of the waste concrete: firstly, pouring 70-80 mm of foam concrete slurry above a widened area foundation (55), and then uniformly scattering waste concrete aggregate with the volume ratio of 20% -30% in 0-1 hour; after the volume of the first layer of the waste concrete light backfilling body (44) is stable, sequentially pouring foam concrete slurry and waste concrete aggregate from bottom to top, repeating the operation, wherein the pouring height is 0.8-1 m, then inserting a built-in connecting rib (80) into the surface of the waste concrete light backfilling body (44), standing for 12-24 hours, and after the waste concrete light backfilling body (44) is initially set, continuously pouring until the pouring is finished; after the light backfilling body (44) of the waste concrete is initially set, covering a water-retaining geomembrane (81) on the top; an upper sealing layer (82) is arranged on the uppermost surface of the waste concrete light backfilling body (44).
2. The construction method for widening and filling the large-particle-size construction waste light embankment according to claim 1, wherein the construction method comprises the following steps: step 2) the pressurizing support frame (2) is formed by rolling profile steel, and a screw hole connected with the pressurizing device (4) is formed in the pressurizing support frame (2); the pressurizing device (4) is hydraulically pressurized, one end of the pressurizing device is connected with the pressurizing support frame (2) through welding, the other end of the pressurizing device is connected with the pressurizing plate (5) through a screw hole, and the pressurizing plate (5) is formed by rolling a steel plate; the first cutting blade (15) consists of four fixed blades (39) which are in a closed rectangular shape and are firmly connected with the side wall (20) of the material crushing box through a first supporting cross beam (9); the second cutting blade (18) comprises a slidable blade (23) and three fixed blades (39), the slidable blade (23) is connected with the blade sliding plate (25) in a welding mode through a blade connecting rod (24), and the second cutting blade (18) is connected with the blade sliding plate in a welding mode through a blade telescopic rod (40); the blade connecting falcon (27) is T-shaped in cross section and is formed by rolling a steel plate, one end of the blade connecting falcon is welded with the blade sliding plate (25), and the other end of the blade connecting falcon is welded with the sliding connecting rod (28); the positioning bolt (29) comprises a screw rod and a nut, and the fastening directions of the screw rods on the two sides of the nut are opposite; the first water sprayer (17) adopts an energy-saving water sprayer, and the vertical inclination angle is 60-80 degrees; the second water sprayer (21) is a high-strength water sprayer, is arranged on the side wall (20) of the material crushing box in a mirror symmetry mode, has a vertical inclination angle of 40-60 degrees, and can realize secondary crushing of waste concrete aggregate between the second limiting side plates (19); the first limiting side plate (16) and the second limiting side plate (19) are both formed by rolling steel plates, and a first discharging hole (41) for aggregate to pass through is preset in the second limiting side plate (19); the first aggregate screen (11) adopts 37.5mm sieve holes; the vibration support (30) adopts mechanical vibration, is firmly connected with a support bottom plate (42) through bolts, enables the support bottom plate (42) to be welded with the side wall (20) of the material crushing box, and assists aggregate sieving through the vibration support (30), and aggregates with the particle size of more than 37.5mm are conveyed to a first aggregate recovery tank (32) through a first discharge plate (22); the discharging slideway (12) is formed by rolling a steel plate, the aperture of a third discharging hole (33) on the surface of the discharging slideway (12) is 9.5mm, and aggregates with the particle size larger than 9.5mm are conveyed to a second aggregate recovery tank (35) through a third discharging plate (34); the discharging slideway (12) and the draining slideway (13) are both arranged obliquely downwards, the inclination angle is controlled to be 20-40 degrees, aggregate with the grain diameter smaller than 9.5mm and wastewater are conveyed to a wastewater recovery tank (38) through the draining slideway (13), and a second aggregate screen (43) for aggregate precipitation is arranged in the wastewater recovery tank (38).
3. The construction method for widening and filling the large-particle-size building waste light embankment according to claim 2, is characterized in that: step 3), the waste concrete lightweight backfill body (44) is prepared from waste concrete aggregate and foam concrete slurry; the foam concrete slurry is prepared from cement, test water, stable foam and polypropylene fibers; the cement is ordinary portland cement; the length of the polypropylene fiber is 12-19 mm; the foaming agent is a composite foaming agent, and the foaming times are more than 20 times; the waste concrete aggregate needs to be soaked in test water for 20-40 minutes, and then is taken out and drained until no clear water exists on the surface.
4. The construction method for widening and filling the large-particle-size construction waste light embankment according to claim 1, wherein the construction method comprises the following steps: step 4), adopting a light consolidated soil body for the widened area foundation (55), wherein the cross section of the light consolidated soil body is rectangular; the oblique reinforcing body (56) is formed by rolling a steel pipe or profile steel, and the horizontal inclination angle is controlled to be 50-70 degrees; the side mold foundation (57) adopts a prefabricated pier body, and the cross section of the side mold foundation is trapezoidal; the side die supporting plate (59) is formed by rolling a steel plate, the lower surface of the side die supporting plate (59) is connected with the side die foundation (57) and the widened area foundation (55) through the socket ribs (60), and the upper surface of the side die supporting plate is connected with the side die template (58) in a welding mode.
5. The large-particle size construction waste light embankment widening and filling construction method according to claim 4, is characterized in that: step 5), the side die plates (58) are made of precast concrete plates or steel plates, different side die plates (58) are firmly connected through a die plate connecting tenon (75) with a trapezoidal cross section, the upper surface of the die plate connecting tenon (75) is connected with the side die plates (58) in a welding mode, the lower surface of the die plate connecting tenon is connected with the connecting tenon sliding plate (76) through a nut, and a connecting tenon sliding groove (77) for the connecting tenon sliding plate (76) to slide is formed in the outer side of the connecting tenon sliding plate (76); the side die lacing wire (63) is formed by rolling a threaded steel bar or a screw; the vertical clamping plate (70) is formed by rolling a steel plate, the clamping plate bottom plate (78) is connected with the vertical clamping plate (70) in a welding mode, and then the clamping plate bottom plate (78) is firmly connected with the widened area foundation (55) through the clamping plate anchor bars (79); the transverse tie bar (66) is made of a threaded steel bar and is connected with the tie bar adjusting bolt (68) through a screw hole.
6. The large-particle size construction waste light embankment widening and filling construction method according to claim 3 or 5, is characterized in that: step 6), the built-in connecting ribs (80) adopt threaded steel bars, and connecting threads are arranged in the built-in connecting ribs; the upper sealing layer (82) is formed by pouring concrete.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116330464A (en) * | 2023-05-29 | 2023-06-27 | 山东天齐明达住工科技有限公司 | Prestressed concrete roof board structure and processing equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116330464A (en) * | 2023-05-29 | 2023-06-27 | 山东天齐明达住工科技有限公司 | Prestressed concrete roof board structure and processing equipment |
| CN116330464B (en) * | 2023-05-29 | 2023-07-21 | 山东天齐明达住工科技有限公司 | Prestressed concrete roof board structure and processing equipment |
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