Cement stabilized macadam roadbed structure

Abstract

The utility model discloses a cement stabilized macadam roadbed structure, which relates to the technical field of road subbases and comprises a roadbed layer, inserting rods are equidistantly inserted into the roadbed layer, a base is fixedly mounted at the top of the roadbed layer, deformed steel bars are fixedly arranged on the base, and threaded rods are spirally connected to the tops of the deformed steel bars through threaded sleeves. The inner wall and the outer side of the threaded sleeve are both provided with threads, and the outer side of the threaded sleeve is spirally connected with a protection piece. The protection part comprises a protection sleeve, a fixing base is fixedly arranged at the top of the protection sleeve, two rotating grooves are formed in the two ends of the fixing base, two symmetrical rotating handles are arranged at the top of the fixing base, the rotating handles are in an arc shape, and the two ends of each rotating handle are arranged in the rotating grooves in the two ends of the same side of the fixing base respectively and rotationally connected with the fixing base. According to the utility model, the protective sleeve is spirally connected with the spiral threads on the outer side of the threaded sleeve to form a compact protective structure, so that broken stones can be isolated outside in a broken stone compaction process, and the broken stones are effectively prevented from entering the threaded sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to road bottom technology field, concretely is a cement stabilized macadam roadbed structure. BACKGROUND

[0002] Cement stabilized macadam bottom base is a commonly used road structure, is used to enhance the bearing capacity and stability of road, it is mixed by macadam, cement and proper water, forms a solid base layer.

[0003] The Chinese utility model patent with patent application number 202323306480.8 provides a cement stabilized macadam bottom base road structure, utilizes the reinforcement of screw thread steel and cross stabilizing plate, can increase the stability of roadbed, reduces the fluidity of macadam roadbed bottom, utilizes the asphalt layer on the upper surface to prevent water, reduces the corrosion to reinforcing structure, prolongs the service life of roadbed.

[0004] But the above-mentioned equipment is found in the use process, the macadam needs to be compacted after laying, the height of macadam layer is greater than the length of screw thread steel, in the process of macadam compaction, macadam will bury screw thread steel and screw thread sleeve, small macadam is easy to enter screw thread sleeve, thereby affecting the installation of subsequent screw thread rod. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a cement stabilized macadam roadbed structure, solves the problem that macadam will bury screw thread steel and screw thread sleeve in the process of macadam compaction, small macadam is easy to enter screw thread sleeve, thereby affecting the installation of subsequent screw thread rod.

[0006] To achieve the above object, the utility model is realized by the following technical scheme: a cement stabilized macadam roadbed structure, including roadbed layer, the top of roadbed layer is paved with macadam layer, the macadam layer is paved with cement layer, the top of cement layer is paved with asphalt layer, the top of asphalt layer is water-permeable pavement, equidistantly inserted into the inside of roadbed layer is inserted rod, the top of inserted rod is fixedly installed with base, the base is fixedly provided with screw thread steel, the top of screw thread steel is spirally connected with screw thread rod through screw thread sleeve, the screw thread rod is spirally connected with cross stabilizing plate, the inner wall and the outside of screw thread sleeve are provided with helical thread, the outside of screw thread sleeve is spirally connected with protection piece.

[0007] The protection piece includes protective sleeve, the top of protective sleeve is fixedly provided with fixed seat, both ends of fixed seat are provided with two rotating grooves, the top of fixed seat is provided with two mutually symmetrical handles, the handle is arc-shaped, both ends of handle are arranged in the rotating groove on the same side of fixed seat and are rotatably connected with fixed seat.

[0008] Preferably, a support frame is fixedly provided on the top periphery of the protective sleeve, and the top of the support frame is horizontal with the top of the fixed base.

[0009] Preferably, the mounting base has a mounting groove in the middle, and the cross-section of the mounting groove is inverted T-shaped.

[0010] Preferably, an mounting plate is slidably installed in the mounting groove, the mounting plate is adapted to the bottom of the mounting groove, and a thin iron sheet is fixedly installed on the top of the mounting plate, the thin iron sheet being adapted to the top of the mounting groove.

[0011] Preferably, the support frame has slots on its front and rear sides and left and right sides. The slots on the front and rear sides of the support frame correspond to the arc-shaped grooves, which are located in the middle of the rotating handle. The slots on the left and right sides of the support frame correspond to the mounting grooves.

[0012] This utility model provides a cement-stabilized crushed stone roadbed structure. It has the following beneficial effects:

[0013] (1) This utility model forms a tight protective structure by spirally connecting the protective sleeve and the spiral pattern on the outside of the threaded sleeve. During the compaction of crushed stone, the crushed stone can be isolated from the outside, effectively preventing the crushed stone from entering the threaded sleeve. When it is necessary to install the threaded rod, the spiral connection makes it easy to disassemble the protective sleeve.

[0014] (2) The present invention uses a sliding mounting plate and a thin iron sheet. When the crushed stone is compacted, the thin iron sheet avoids obstructing the compaction. At the same time, the thin iron sheet makes it easy to mark the position of the threaded sleeve. Construction personnel can easily find the position of the threaded sleeve, which provides accurate positioning for the subsequent installation of the threaded rod.

[0015] This solves the problem that during the crushed stone compaction process, the crushed stone can bury the threaded steel bars and threaded sleeves, and small pieces of gravel can easily enter the threaded sleeves, thus affecting the subsequent installation of the threaded rods. Attached Figure Description

[0016] Figure 1 This is a diagram showing the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Structural diagrams showing the installation of the front and rear insertion rods;

[0018] Figure 3 This utility model Figure 2 Exploded view of the structure with the front insert rod installed in the middle;

[0019] Figure 4 This utility model Figure 3 An explosion illustration of the protective components.

[0020] In the figure, 1, subgrade layer; 2, gravel layer; 3, cement layer; 4, asphalt layer; 5, water-permeable pavement; 6, insertion rod; 61, base; 62, threaded steel; 63, threaded sleeve; 7, threaded rod; 8, cross stabilizing plate; 9, protective piece; 91, protective sleeve; 92, support frame; 93, fixed seat; 931, mounting groove; 932, rotating groove; 94, handle; 941, arc-shaped groove; 95, thin iron sheet; 951, mounting plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Embodiment 1

[0023] Please refer to Figures 1-4 A cement stabilized gravel subgrade structure, comprising a subgrade layer 1, a gravel layer 2 laid on the top of the subgrade layer 1, a cement layer 3 laid on the gravel layer 2, an asphalt layer 4 laid on the top of the cement layer 3, a water-permeable pavement 5 on the top of the asphalt layer 4, an insertion rod 6 inserted into the subgrade layer 1 at equal intervals, a base 61 fixedly installed on the top of the insertion rod 6, a threaded steel 62 fixedly arranged on the base 61, a threaded rod 7 screw-connected to the top of the threaded steel 62 through a threaded sleeve 63, a cross stabilizing plate 8 screw-connected to the threaded rod 7, and a protective piece 9 screw-connected to the outer side of the threaded sleeve 63, wherein the inner wall and the outer side of the threaded sleeve 63 are provided with screw threads, and the outer side of the threaded sleeve 63 is screw-connected to the protective piece 9.

[0024] The protective piece 9 comprises a protective sleeve 91, the top of the protective sleeve 91 is fixedly provided with a fixed seat 93, both ends of the fixed seat 93 are provided with two rotating grooves 932, the top of the fixed seat 93 is provided with two mutually symmetrical handles 94, the handles 94 are arc-shaped, and both ends of the handles 94 are arranged in the rotating grooves 932 on the same side of the fixed seat 93 and are rotationally connected to the fixed seat 93.

[0025] The top of the protective sleeve 91 is fixedly provided with a support frame 92, and the top of the support frame 92 is horizontal to the top of the fixed seat 93.

[0026] Specifically, in the normal state, the protective sleeve 91 is tightly sleeved outside the threaded sleeve 63 through the helical connection between the helical threads on the inner wall of the protective sleeve 91 and the helical threads on the outer side of the threaded sleeve 63. During the paving and compaction of the gravel layer 2, the protective sleeve 91 acts as a defense line to directly block the contact between the gravel and the threaded sleeve 63, thereby preventing fine gravel from entering the threaded sleeve 63. After the gravel layer 2 is compacted, when the threaded rod 7 needs to be installed, the protective sleeve 91 needs to be controlled to rotate, so as to be removed from the threaded sleeve 63.

[0027] In the normal state, the rotating handle 94 is parallel to the top of the protective sleeve 91, and the support frame 92 fixed on the top of the protective sleeve 91 is horizontally arranged on the top of the fixing seat 93, thereby providing protection for the rotating handle 94 and avoiding the deformation and damage of the rotating handle 94 caused by the pressure during the compaction of the gravel. When the protective sleeve 91 needs to be removed from the threaded sleeve 63, the rotating handle 94 is rotated to be perpendicular to the top surface of the protective sleeve 91, so that the construction personnel can hold the rotating handle 94 and rotate the protective sleeve 91 through the rotating handle 94, thereby removing the protective sleeve 91 from the threaded sleeve 63 by the helical connection between the protective sleeve 91 and the threaded sleeve 63, and exposing the inside of the threaded sleeve 63.

[0028] After the protective sleeve 91 is removed, the threaded rod 7 is aligned with the opening of the threaded sleeve 63. Due to the effective protection of the protective sleeve 91, the inside of the threaded sleeve 63 is free of gravel and other sundries, so that the threaded rod 7 can be helically connected along the helical threads on the inner wall of the threaded sleeve 63. The construction personnel can rotate the threaded rod 7 to gradually insert it into the threaded sleeve 63, thereby completing the installation of the threaded rod 7. After the installation of the threaded rod 7 is completed, the cross-shaped stabilizing plate 8 is helically connected to the threaded rod 7. The cross-shaped stabilizing plate 8 can press and limit the upper end of the gravel layer 2, thereby further increasing the stability of the gravel layer 2.

[0029] Embodiment 2

[0030] For the convenience of the construction personnel in positioning the threaded sleeve 63, please refer to Figures 1-4 On the basis of embodiment 1, the middle of the fixing seat 93 is provided with a mounting groove 931, and the cross section of the mounting groove 931 is in the shape of an inverted T.

[0031] The mounting plate 951 is slidably mounted in the mounting groove 931, the top of the mounting plate 951 is fixedly provided with the thin iron sheet 95, and the thin iron sheet 95 is matched with the top of the mounting groove 931.

[0032] The front and rear sides and the left and right sides of the support frame 92 are provided with notches, the notches on the front and rear sides of the support frame 92 correspond to the arc-shaped grooves 941, the arc-shaped grooves 941 are arranged in the middle of the rotating handle 94, and the notches on the left and right sides of the support frame 92 correspond to the mounting groove 931.

[0033] Specifically, the mounting plate 951 is slidingly mounted in the mounting groove 931 in the middle of the fixing seat 93, and the thin iron sheet 95 at the top of the mounting plate 951 is matched with the top of the mounting groove 931. When paving the gravel, the gravel is higher than the protective piece 9, but the thin iron sheet 95 is in a vertical state and is exposed above the gravel layer 2. During the compaction of the gravel layer 2, the thin iron sheet 95 does not obviously hinder the compaction operation, and because it is located above the protective structure, after the gravel is compacted, the thin iron sheet 95 is still in a visible position. The construction personnel can easily determine the approximate position of the threaded sleeve 63 below the thin iron sheet 95. With the positioning assistance of the thin iron sheet 95 and the slot, the construction personnel can quickly and accurately find the position of the threaded sleeve 63, and then quickly remove the protective piece 9 and replace it with the threaded rod 7, without spending a lot of time blindly searching in the compacted gravel layer 2, greatly shortening the construction time, especially in large-scale roadbed construction, which can effectively improve the overall construction progress.

[0034] The sliding installation of the thin iron sheet 95 and the mounting plate 951 in the mounting groove 931 can make the operation relatively simple when the thin iron sheet 95 needs to be replaced. The construction personnel can easily access the mounting plate 951 through the slot, slide the old thin iron sheet 95 and the mounting plate 951 out of the mounting groove 931, and then slide the new components into the mounting groove 931 to complete the replacement, avoiding complex disassembly and installation processes.

[0035] Working principle: according to the design requirements, the roadbed layer 1 is processed to ensure that it has sufficient bearing capacity and stability to provide a solid foundation for the subsequent structural layer. The insertion rod 6 is inserted into the roadbed layer 1 at equal intervals, the top of the insertion rod 6 is fixedly installed on the base 61, the threaded steel 62 is fixedly arranged on the base 61, and the protective sleeve 91 is tightly screwed onto the outside of the threaded sleeve 63 at the top of the threaded steel 62 through the spiral thread, so that the protective sleeve 91 completely covers the threaded sleeve 63. The gravel layer 2 is paved on the top of the roadbed layer 1, the gravel is higher than the protective piece 9, and the thin iron sheet 95 is in a vertical state and is exposed above the gravel layer 2. During the compaction of the gravel layer 2, the protective sleeve 91 plays a protective role and directly blocks the contact between the gravel and the threaded sleeve 63, preventing fine gravel from entering the threaded sleeve 63. At the same time, the thin iron sheet 95 does not obviously hinder the compaction operation. After the gravel is compacted, the thin iron sheet 95 is bent but still in a visible position, and the construction personnel can determine the position of the threaded sleeve 63 according to the thin iron sheet 95;

[0036] The rotation handle 94 is rotated to be perpendicular to the top surface of the protective sleeve 91, the protective sleeve 91 is rotated by rotating the rotation handle 94, the protective sleeve 91 is taken off from the threaded sleeve 63 by the screw connection relationship between the protective sleeve 91 and the threaded sleeve 63, the inside of the threaded sleeve 63 is exposed, the threaded rod 7 is aligned with the opening of the threaded sleeve 63, the threaded rod 7 is screwed along the helical thread of the inner wall of the threaded sleeve 63, and the threaded rod 7 is gradually inserted into the threaded sleeve 63, the installation of the threaded rod 7 is completed, the cross stabilizing plate 8 is screwed on the threaded rod 7, the cross stabilizing plate 8 is pressed and limited on the upper end of the gravel layer 2, and the stability of the gravel layer 2 is further increased, then the cement layer 3, the asphalt layer 4 and the permeable pavement 5 are sequentially laid on the gravel layer 2 and the cross stabilizing plate 8, and each layer is constructed according to the design requirement, so that the quality and performance of each layer meet the road use standard.

[0037] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

[0038] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A cement-stabilized crushed stone roadbed structure, comprising a roadbed base (1), a crushed stone layer (2) laid on top of the roadbed base (1), a cement layer (3) laid on the crushed stone layer (2), an asphalt layer (4) laid on top of the cement layer (3), a permeable pavement (5) on top of the asphalt layer (4), inserts (6) evenly spaced inside the roadbed base (1), a base (61) fixedly installed on the top of the inserts (6), a threaded steel bar (62) fixedly installed on the base (61), a threaded rod (7) spirally connected to the top of the threaded steel bar (62) through a threaded sleeve (63), and a cross-shaped stabilizing plate (8) spirally connected to the threaded rod (7), characterized in that: The inner wall and the outer side of the threaded sleeve (63) are provided with helical threads, and the outer side of the threaded sleeve (63) is spirally connected with a protective piece (9); The protective piece (9) comprises a protective sleeve (91), and a fixing seat (93) is fixedly arranged at the top of the protective sleeve (91); two rotating grooves (932) are formed at the two ends of the fixing seat (93); and two mutually symmetrical rotating handles (94) are arranged at the top of the fixing seat (93).

2. A cement stabilized aggregate subbase structure according to claim 1, wherein: The top of the protective sleeve (91) is fixedly provided with a support frame (92), and the top of the support frame (92) is horizontal with the top of the fixing seat (93).

3. A cement treated base structure according to claim 2, wherein: The middle of the fixing seat (93) is provided with a mounting groove (931), and the cross section of the mounting groove (931) is inverted T-shaped.

4. A cement treated base structure according to claim 3, wherein: The mounting groove (931) is slidably mounted with an installation plate (951), the installation plate (951) is matched with the bottom of the mounting groove (931), and the top of the installation plate (951) is fixedly mounted with a thin iron sheet (95), which is matched with the top of the mounting groove (931).

5. A cement treated base structure according to claim 4, wherein: The front and rear sides and the left and right sides of the support frame (92) are provided with notches, the notches on the front and rear sides of the support frame (92) correspond to the arc-shaped grooves (941), the arc-shaped grooves (941) are arranged in the middle of the rotating handles (94), and the notches on the left and right sides of the support frame (92) correspond to the mounting grooves (931).

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