Roadbed and pavement splicing structure for roadbed engineering

Abstract

The utility model discloses a roadbed pavement splicing structure of roadbed engineering, which comprises a new road cushion layer arranged on one side of an old road cushion layer, and an old road base layer, an old concrete slab layer and an old asphalt surface layer are sequentially arranged above the old road cushion layer. A new road base layer, a new concrete slab layer and a new asphalt surface layer are sequentially arranged above the new road cushion layer, and concrete sleeper beams are jointly embedded in the top surfaces of the connecting ends of the old road base layer and the new road base layer; according to the utility model, the construction process is simple, the construction difficulty is low, the concrete sleeper beam can play a supporting role below the connecting end of the old concrete slab layer, and the concrete sleeper beam and the new concrete slab layer are fixed, so that the concrete sleeper beam can be mutually engaged with the first step; in addition, the concrete sleeper beam is embedded in the new road base layer, so that the transverse displacement of the new concrete slab layer can be reduced to a certain extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to road engineering technical field, concretely is a roadbed pavement splicing structure of roadbed engineering. BACKGROUND

[0002] In the reconstruction and expansion project of roadbed engineering, the splicing between new and old pavements is the biggest difficulty, and the splicing quality of new and old pavements will directly affect the safety of later driving and the service life of pavements. In the existing roadbed pavement splicing structure, a step is usually opened at the splicing end of the old roadbed, and the step is used to improve the bonding strength between the new and old steps.

[0003] Through the search, the patent with the announcement number CN221029370U discloses a roadbed pavement splicing structure, which adopts a step inversion method and is provided with a T-shaped structure at the upper end. The upper end of the T-shaped structure includes part of the new pavement cement layer and the new pavement surface layer, and the T-shaped structure can effectively block the structure settlement and lateral movement at the upper end. The lower end of the T-shaped structure is excavated to reestablish the new pavement base layer and the new pavement cement layer. The new pavement cement layer increases the thickness of the foundation base in the new and old road interface area, strengthens the support, and reduces the later settlement deformation. Therefore, after the step inversion, the settlement and lateral movement of the new pavement at the upper end of the T-shaped structure are reduced, thereby avoiding the generation of gaps between the new and old pavements.

[0004] The above-mentioned scheme can greatly improve the connection strength between the new and old cement layers by setting a T-shaped structure on the original pavement cement layer and engaging the T-shaped structure with the new pavement cement layer. However, the construction process of the T-shaped structure is too complex, the processing difficulty is large, and the original pavement cement layer connection end is prone to fracture, which needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a roadbed pavement splicing structure of roadbed engineering to solve the problems in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0007] The utility model provides a roadbed pavement splicing structure of roadbed engineering, including the new road cushion layer of setting in old road cushion layer side, the old road cushion layer top is sequentially provided with old road base layer, old concrete slab layer and old asphalt surface layer, the new road cushion layer top is sequentially provided with new road base layer, new concrete slab layer and new asphalt surface layer, the joint end top surface of old road base layer and new road base layer is embedded with concrete sleeper beam in common, and concrete sleeper beam is fixedly connected with new concrete slab layer, and the one end of old concrete slab layer towards new concrete slab layer is located the direct top of concrete sleeper beam, the one end of old concrete slab layer towards new concrete slab layer is provided with first step, and the joint end of new concrete slab layer and old concrete slab layer covers on first step, the one end of old asphalt surface layer towards second step is provided with second step, and the joint end of new asphalt surface layer and old asphalt surface layer covers on second step, and the one end of new road base layer towards old road base layer is located the direct top of old road cushion layer, the one end of new concrete slab layer towards old concrete slab layer is located the direct top of old road base layer, the one end of new asphalt surface layer towards old asphalt surface layer is located the direct top of old concrete slab layer, and the upper surface of joint end of old concrete slab layer and new concrete slab layer is paved with polyester glass cloth in common.

[0008] As a further scheme of the utility model: the top surface of the concrete sleeper beam is embedded with an I-shaped cushion block, the top end of the I-shaped cushion block is located within the new concrete slab layer, and the one end of the old concrete slab layer towards the new concrete slab layer is located on the inner side of the I-shaped cushion block.

[0009] As a further scheme of the utility model: the width of the concrete sleeper beam extending below the old concrete slab layer is not less than 15cm, the width of the concrete sleeper beam is not less than 40cm, and the height of the concrete sleeper beam is not less than 25cm.

[0010] As a further scheme of the utility model: the upper surface width of the first step is not less than 15cm.

[0011] As a further scheme of the utility model: the upper surface width of the second step is not less than 15cm.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses construction process is simple, and the construction difficulty is low, through the setting of concrete pillow beam, can play the supporting effect below the connecting end of old concrete slab layer, and because the fixed between concrete pillow beam and new concrete slab layer, therefore can be mutually engaged with first step, thereby improve the connecting strength of new concrete slab layer and old concrete slab layer in vertical direction, in addition, because concrete pillow beam is embedded in new road base, therefore can reduce the lateral displacement of new concrete slab layer to a certain extent, through the setting of polyester glass fiber cloth, then can improve the instantaneous tensile strength of new asphalt surface layer at old concrete slab layer and new concrete slab layer joint, to reduce and delay the generation of reflection crack, improve the service life of pavement. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of roadbed pavement splicing structure's structural schematic diagram of roadbed engineering.

[0015] Figure 2 It is a kind of roadbed pavement splicing structure's structural schematic diagram of roadbed engineering.

[0016] Figure 3 It is Figure 1 Enlarged view of A in the middle.

[0017] Wherein, old road cushion layer 1, new road cushion layer 2, old road base 3, new road base 4, concrete pillow beam 5, I-shaped pad 6, old concrete slab layer 7, first step 8, new concrete slab layer 9, old asphalt surface layer 10, second step 11, new asphalt surface layer 12, polyester glass fiber cloth 13. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and apparent, the following will be combined with embodiment, and the utility model will be further described in detail.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0019] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element.When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0022] Please refer to Figures 1 to 3 In the embodiment of the present application, a subgrade pavement splicing structure of subgrade engineering, comprising a new road cushion layer 2 arranged on one side of an old road cushion layer 1, an old road base layer 3, an old concrete slab layer 7 and an old asphalt surface layer 10 are sequentially arranged above the old road cushion layer 1, a new road base layer 4, a new concrete slab layer 9 and a new asphalt surface layer 12 are sequentially arranged above the new road cushion layer 2, the connecting end top surfaces of the old road base layer 3 and the new road base layer 4 are jointly embedded with a concrete sleeper beam 5, the concrete sleeper beam 5 is fixedly connected with the new concrete slab layer 9, specifically, the concrete sleeper beam 5 and the new concrete slab layer 9 can adopt an integral pouring structure, or a protruding connecting rib can be pre-embedded in the pouring process of the concrete sleeper beam 5, and the connecting rib is covered when pouring the new concrete slab layer 9, so as to realize the fixation between the concrete sleeper beam 5 and the new concrete slab layer 9, one end of the old concrete slab layer 7 towards the new concrete slab layer 9 is located directly above the concrete sleeper beam 5, the one end of the old concrete slab layer 7 towards the new concrete slab layer 9 is provided with a first step 8, the connecting end of the new concrete slab layer 9 and the old concrete slab layer 7 covers the first step 8, one end of the old asphalt surface layer 10 towards the second step 11 is provided with a second step 11, the connecting end of the new asphalt surface layer 12 and the old asphalt surface layer 10 covers the second step 11, one end of the new road base layer 4 towards the old road base layer 3 is located directly above the old road cushion layer 1, one end of the new concrete slab layer 9 towards the old concrete slab layer 7 is located directly above the old road base layer 3, one end of the new asphalt surface layer 12 towards the old asphalt surface layer 10 is located directly above the old concrete slab layer 7, and the upper surfaces of the connecting ends of the old concrete slab layer 7 and the new concrete slab layer 9 are jointly laid with a polyester glass cloth 13.

[0023] The utility model discloses a through the adoption of above -mentioned scheme, through the setting of concrete pillow beam 5, can play the supporting effect below the connecting end of old concrete slab layer 7, and because concrete pillow beam 5 and new concrete slab layer 9 between are fixed, thus can be mutually engaged with first step 8, thereby improve new concrete slab layer 9 and old concrete slab layer 7's connecting strength in vertical direction, in addition, because concrete pillow beam 5 is embedded in new road base 4, thus can reduce new concrete slab layer 9's lateral displacement to a certain extent, through the setting of polyester glass cloth 13, then can improve new asphalt surface layer 12's instantaneous tensile strength at old concrete slab layer 7 and new concrete slab layer 9 joint, to reduce and delay the generation of reflection crack, improve the service life of pavement.

[0024] Specifically combined Figure 1 And Figure 2 In an embodiment of the utility model, the top surface of the concrete pillow beam 5 is embedded with an I-shaped cushion block 6, the top end of the I-shaped cushion block 6 is located in the new concrete slab layer 9, and the end of the old concrete slab layer 7 towards the new concrete slab layer 9 is located inside the I-shaped cushion block 6.

[0025] Through the setting of the I-shaped cushion block 6, when pouring the concrete pillow beam 5 and the new concrete slab layer 9 separately, the fixed connection of the two can be ensured, and the structural strength of the new concrete slab layer 9 at the first step 8 can be enhanced.

[0026] In addition, in some preferred embodiments of the utility model, the width of the concrete pillow beam 5 extending below the old concrete slab layer 7 is not less than 15 cm, the width of the concrete pillow beam 5 is not less than 40 cm, and the height of the concrete pillow beam 5 is not less than 25 cm, so as to ensure the structural strength of the concrete pillow beam 5 and the supporting effect on the connecting end of the old concrete slab layer 7.

[0027] Further, the upper surface width of the first step 8 is not less than 15 cm, and the upper surface width of the second step 11 is not less than 15 cm.

[0028] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A roadbed and pavement splicing structure for roadbed engineering, characterized in that: The utility model relates to a new and old road pavement structure, including the new road cushion (2) of setting in old road cushion (1) one side, the old road cushion (1) top is sequentially provided with old road base (3), old concrete slab layer (7) and old asphalt surface (10), the new road cushion (2) top is sequentially provided with new road base (4), new concrete slab layer (9) and new asphalt surface (12), the connecting end top surface of old road base (3) and new road base (4) is embedded with concrete sleeper beam (5) in common, concrete sleeper beam (5) is fixedly connected with new concrete slab layer (9), the one end of old concrete slab layer (7) towards new concrete slab layer (9) is located the direct upper side of concrete sleeper beam (5), the one end of old concrete slab layer (7) towards new concrete slab layer (9) is provided with first step (8), the connecting end of new concrete slab layer (9) and old concrete slab layer (7) covers on first step (8), the one end of old asphalt surface (10) towards second step (11) is provided with second step (11), the connecting end of new asphalt surface (12) and old asphalt surface (10) covers on second step (11), the one end of new road base (4) towards old road base (3) is located the direct upper side of old road cushion (1), the one end of new concrete slab layer (9) towards old concrete slab layer (7) is located the direct upper side of old road base (3), the one end of new asphalt surface (12) towards old asphalt surface (10) is located the direct upper side of old concrete slab layer (7), the connecting end upper surface of old concrete slab layer (7) and new concrete slab layer (9) is paved with polyester glass cloth (13) in common.

2. The subbase pavement splicing structure of subbase engineering according to claim 1, characterized in that: The top of concrete sleeper beam (5) is embedded with I-shaped cushion block (6), the top end of I-shaped cushion block (6) is located in new concrete slab layer (9), the one end of old concrete slab layer (7) towards new concrete slab layer (9) is located the inside of I-shaped cushion block (6).

3. The subbase pavement splicing structure of subbase engineering according to claim 1, characterized in that: The width of concrete sleeper beam (5) extending to old concrete slab layer (7) below is not less than 15cm, the width of concrete sleeper beam (5) is not less than 40cm, the height of concrete sleeper beam (5) is not less than 25cm.

4. The subbase pavement splicing structure of subbase engineering according to claim 1, characterized in that: The upper surface width of first step (8) is not less than 15cm.

5. The subbase pavement splicing structure of subbase engineering according to claim 1, characterized in that: The upper surface width of second step (11) is not less than 15cm.

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