Constraint structure for reducing transverse deformation of high-fill embankment in loess area

Abstract

The utility model discloses a constraint structure for reducing transverse deformation of a high-fill embankment in a loess area, and belongs to the technical field of road construction. Comprising a limiting plate, a balance plate and a reverse pressing plate which are buried in an embankment, the limiting plates are laid on the revetments on the two sides of the high-fill embankment and right face each other in position, and the limiting plates are tightly attached to the slope surfaces of the revetments. The cross section of each balance plate is in a cross shape, the balance plates are embedded in the directions, extending towards the center of the roadbed, of the two limiting plates, and the elevation of the balance plates is equal to that of the limiting plates; a plurality of first steel cables are connected between the vertical plate of the balance plate and the adjacent limiting plate; the back pressure plate is horizontally arranged in the center of the roadbed, and the elevation of the back pressure plate is lower than that of the center of the balance plate; a plurality of second steel cables are connected between the left and right ends of the reverse pressing plate and the horizontal plane of the adjacent balance plate. The lower end of the vertical plate is sleeved with a vertical plate sheath, the reverse pressing plate is a rectangular steel plate, and protruding structures are densely distributed on the upper surface and the lower surface of the reverse pressing plate and used for increasing the friction force of the reverse pressing plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of road construction, specifically relates to the technical field of high fill roadbed reinforcement, and more specifically relates to a constraint structure for reducing the lateral deformation of high fill road embankments in loess areas. Background Art

[0002] There are a large number of crisscrossing "V"-shaped gullies on the Loess Plateau, presenting a state of "thousands of gullies and ravines". When the expressway passes through the "V"-shaped gully area, in order to maintain the longitudinal smoothness of the line, it is inevitable to encounter high fill embankments. Due to the heavy weight of the high fill embankment itself, in addition to significant settlement, under the action of the upper vehicle load, it is also accompanied by certain lateral deformation and road cracking, and even the basic body of the road becomes unstable. Especially under heavy rainfall and overload conditions, the probability of instability increases significantly, seriously threatening the normal operation of the highway.

[0003] At present, high embankments are mostly solved by paving multiple layers of geotechnical materials or installing tension-type limit structures. When the terrain is flat, the lateral deformation and stability of the high embankment can be better maintained. However, on sloping terrain, it is difficult to maintain the high embankment in good working condition, especially in heavy rainfall and earthquake environments, and the risk of instability is extremely high.

[0004] In order to solve the instability problem of high embankments, the existing traditional technology uses the tension effect of the limit plates on both sides of the embankment slope to constrain the lateral deformation of the roadbed. This structure has a good lateral constraint effect on high embankments on flat terrain, but it is less applicable to lateral constraints on high embankments on sloped terrain. The main reason is that the high embankment on flat terrain is basically symmetrical to the center line of the embankment, and the deformation on both sides of the embankment is not much different. The forces on the limit plates on both sides can offset each other to maintain the stability of the embankment; the high embankment on sloped terrain is obviously asymmetrical, and the deformation on both sides of the embankment is quite different. The force on the limit plate on the side with a larger slope length is significantly higher than that on the other side, causing the embankment to move toward the side with a larger slope length, resulting in reduced stability of the embankment and the risk of instability. Utility Model Content

[0005] In order to solve the problem of poor stability and possible instability of high fill embankments, the utility model provides a constraint structure for reducing the lateral deformation of high fill embankments in loess areas.

[0006] To this end, the utility model adopts the following technical solutions:

[0007] A constraint structure for reducing the lateral deformation of a high embankment in a loess region comprises a limit plate, a balance plate and a back pressure plate buried in the embankment; the limit plates are laid on the slope protection on both sides of the high embankment and are positioned opposite to each other, and the limit plates are arranged close to the slope surface of the slope protection; the cross section of the balance plate is a "cross" shape, and balance plates are buried in the two limit plates in the direction extending toward the center of the roadbed, and the elevation of the balance plate is equal to the elevation of the limit plate; a plurality of first steel cables are connected between the vertical plate of the balance plate and the adjacent limit plate; the back pressure plate is horizontally arranged at the center of the roadbed, and the elevation of the back pressure plate is lower than the elevation of the center of the balance plate; a plurality of second steel cables are connected between the left and right ends of the back pressure plate and the horizontal plane of the adjacent balance plate, respectively.

[0008] Furthermore, the back pressure plate is a rectangular steel plate, and the upper surface and the lower surface of the back pressure plate are densely covered with convex structures, and the convex structures are used to increase the friction force of the back pressure plate.

[0009] Furthermore, a number of back-pressure plate holes corresponding to the number of the second steel cables are provided at the center of the back-pressure plate along the direction of the second steel cables, and the back-pressure plate holes are used to pass the second steel cables.

[0010] Furthermore, the part of the second steel cable exposed in the soil is sleeved with a second elastic sleeve; the head end of the second steel cable is provided with a second anchor head and a second threaded structure, and the second anchor head and the second threaded structure are used to connect the balance plate.

[0011] Furthermore, the cross section of the balance plate is in the shape of a cross, including a cross-shaped horizontal plate and a vertical plate, and a plurality of horizontal plate bolts are provided on one end of the horizontal plate close to the back pressure plate, and the horizontal plate bolts are used to connect the second steel cable.

[0012] Furthermore, a vertical plate sheath is sleeved on the lower end of the vertical plate.

[0013] Furthermore, a plurality of vertical plate bolts are provided on one side of the vertical plate close to the limiting plate, and the vertical plate bolts are used to connect the first steel cable.

[0014] Furthermore, the portion of the first steel cable exposed in the soil is sleeved with a first elastic sleeve.

[0015] Furthermore, corresponding first anchor heads and first threaded structures are provided at both ends of the first steel cable, and the first anchor heads and the first threaded structures are used to connect the balance plate and the limit plate.

[0016] The working mechanism of the constraint structure of the utility model is:

[0017] The lateral deformation of high embankment usually starts from the shallow soil of the slope. When the shallow soil of the high embankment slope undergoes lateral deformation, the limit plate close to the slope undergoes a linked lateral displacement, and the steel strand between the limit plate and the balance plate generates additional tension ∆ F 1.

[0018] When the shallow soil undergoes lateral displacement, the middle soil will not undergo linked lateral displacement due to the restriction of the vertical plate in the balance plate, that is, it will remain stable.

[0019] Additional tension ∆ F 1 The linkage balance plate has lateral displacement, and the steel strand between the balance plate and the reaction plate also generates additional tension ∆ F 2.

[0020] Additional tension ∆ F 2Vertical force ∆ F 21 The linkage back pressure plate has vertical displacement, and the weight of the soil column on the back pressure plate provides the reaction load balance∆ F 21 .

[0021] Additional tension ∆ F 2Horizontal force ∆ F 22 The linkage back pressure plate has horizontal displacement, and the steel strand connected to the balance plate on the other side provides a counter force to balance the horizontal force ∆ F 22 .

[0022] Through a series of linkage reactions among the above components, the lateral deformation of the high fill embankment is restrained from further development, thereby maintaining the stability of the roadbed.

[0023] The beneficial effects of the utility model are:

[0024] Compared with the prior art, the utility model not only uses the counter-pressure plate for pulling, but also has the friction between the embankment soil column and the counter-pressure plate, and the load dispersion effect of the balance plate, so it can well solve the shortcomings of the traditional technology. Therefore, the present invention can be applied not only to flat terrain, but also to slope terrain. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the restraining structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the connection of the back pressure plate of the constraint structure of the utility model;

[0027] Figure 3 It is a three-dimensional schematic diagram of the constraint structure balance board of the utility model;

[0028] Figure 4 This is a front view of the constraint structure balance board of the utility model;

[0029] Figure 5 It is a left view of the constraint structure balance board of the utility model;

[0030] Figure 6It is a three-dimensional schematic diagram of the vertical plate sheath of the restraining structure of the utility model;

[0031] Figure 7 It is a three-dimensional schematic diagram of the limiting plate of the constraint structure of the utility model;

[0032] Figure 8 It is a schematic diagram of the first steel cable of the restraining structure of the utility model;

[0033] Fig. 9 It is a top view of the anchor plate, clip and anchor cap of the constraint structure of the utility model;

[0034] In the figure: 1. embankment, 2. counter pressure plate, 3. balance plate, 4. vertical plate sheath, 5. limit plate, 6. second steel cable, 7. first steel cable, 8. clip, 9. anchor plate, 10. anchor cap;

[0035] 201. Back pressure plate channel, 202. Protruding structure, 301. Vertical plate, 302. Horizontal plate, 303. Vertical plate bolts, 304. Horizontal plate bolts, 401. Sheath bolts, 501. Limiting plate bolt holes, 601. Second steel cable strand, 602. Second anchor head, 603. Second threaded structure, 604. Second casing, 701. First steel cable strand, 702. First anchor head, 703. First threaded structure, 704. First casing, 901. Anchor plate thread, 1001. Anchor cap thread. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0037] like Figure 1 As shown, a constraint structure for reducing the lateral deformation of high fill embankments in loess areas includes a limit plate 5, a balance plate 3 and a back pressure plate 2 buried in the embankment 1, the back pressure plate 2 is arranged at the center of the roadbed, the balance plate 3 includes two plates respectively arranged at the outer side of the middle of the roadbed, the limit plate 5 includes two plates respectively arranged at the side slope positions, and steel cables are connected between adjacent components.

[0038] like Figure 1 As shown, the limit plates 5 are laid on the slopes on both sides of the high embankment and are opposite to each other. The limit plates 5 are arranged close to the slope of the slope, and the two limit plates 5 adopt a tensioning structure to stabilize the roadbed as a whole. The cross section of the balance plate 3 is a "cross" shape. The two limit plates 5 are buried with balance plates 3 in the direction extending toward the center of the roadbed. The elevation of the balance plate 3 is equal to the elevation of the limit plates 5; a number of first steel cables 7 are connected between the vertical plate 301 of the balance plate 3 and the adjacent limit plates 5. The counter-pressure plate 2 is arranged horizontally at the center of the roadbed, and the elevation of the counter-pressure plate 2 is lower than the center elevation of the balance plate 3; a number of second steel cables 6 are connected between the left and right ends of the counter-pressure plate 2 and the horizontal planes of the adjacent balance plates 3.

[0039] like Figure 2 As shown, the back pressure plate 2 is a rectangular steel plate, and the upper and lower surfaces of the back pressure plate 2 are densely covered with protrusion structures 202, which are used to increase the friction of the back pressure plate 2. The center of the back pressure plate 2 is provided with a number of back pressure plate holes 201 corresponding to the number of the second steel cables 6 along the direction of the second steel cables 6, and the back pressure plate holes 201 are used to pass the second steel cables 6. The head end of the second steel cable 6 is provided with a second anchor head 602 and a second threaded structure, and the second anchor head 602 and the second threaded structure are used to connect the balance plate 3, and the second steel cable 6 exposed in the soil is sleeved with a second sleeve 604.

[0040] like Figure 3 , 4 As shown in FIG. 5 , the cross section of the balance plate 3 is in the shape of a cross, including a cross-shaped horizontal plate and a vertical plate. A plurality of horizontal plate bolts 304 are provided on one end of the horizontal plate close to the back pressure plate 2, and the horizontal plate bolts 304 are used to connect the second steel cable 6. A plurality of vertical plate bolts 303 are provided on one side of the vertical plate close to the limit plate 5, and the vertical plate bolts 303 are used to connect the first steel cable 7. A vertical plate sheath 4 is sleeved at the lower end of the vertical plate, and a sheath bolt 401 is provided on the vertical plate sheath 4.

[0041] One end of the first steel cable 7 is provided with a corresponding first anchor head 702 and a first thread structure 703, and the first anchor head 702 and the first thread structure 703 are used to connect the balance plate 3 and the limit plate 5. The first steel cable 7 is partially exposed in the soil and is sleeved with a first sleeve.

Claims

1. A restraint structure for reducing the lateral deformation of high fill embankments in loess areas, characterized in that: It includes limit plates, balance plates and counter-pressure plates buried in the embankment; The limit plates are laid on the slope protection on both sides of the high embankment and are located opposite to each other. The limit plates are laid close to the slope surface of the slope protection; The cross section of the balance plate is in the shape of a "cross", and balance plates are buried in the two limit plates in the direction extending toward the center of the roadbed, and the elevation of the balance plate is equal to the elevation of the limit plate; a plurality of first steel cables are connected between the vertical plate of the balance plate and the adjacent limit plates; The counter-pressure plate is arranged horizontally at the center of the roadbed, and its elevation is lower than the center elevation of the balance plate; a plurality of second steel cables are respectively connected between the left and right ends of the counter-pressure plate and the adjacent horizontal plates of the balance plate.

2. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 1 is characterized in that: The back pressure plate is a rectangular steel plate, and the upper surface and the lower surface of the back pressure plate are densely covered with convex structures, and the convex structures are used to increase the friction force of the back pressure plate.

3. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 2 is characterized in that: The center of the back pressure plate is provided with back pressure plate holes corresponding to the number of the second steel cables along the direction of the second steel cables, and the back pressure plate holes are used to pass the second steel cables.

4. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 3 is characterized in that: The part of the second steel cable exposed in the soil is sleeved with a second elastic sleeve; the head end of the second steel cable is provided with a second anchor head and a second threaded structure, and the second anchor head and the second threaded structure are used to connect the balance plate.

5. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 4 is characterized in that: The cross section of the balance plate is in the shape of a cross, including a cross-shaped horizontal plate and a vertical plate. A plurality of horizontal plate bolts are provided on one end of the horizontal plate close to the back pressure plate, and the horizontal plate bolts are used to connect the second steel cable.

6. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 5 is characterized in that: The lower end of the vertical plate is sleeved with a vertical plate sheath.

7. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 5 is characterized in that: A plurality of vertical plate bolts are arranged on one side of the vertical plate close to the limiting plate, and the vertical plate bolts are used to connect the first steel cable.

8. The restraining structure for reducing lateral deformation of high fill embankments in loess regions according to claim 7 is characterized in that: The portion of the first steel cable exposed in the soil is sleeved with a first elastic sleeve.

9. The restraint structure for reducing lateral deformation of high fill embankments in loess regions according to claim 7, characterized in that: The two ends of the first steel cable are provided with corresponding first anchor heads and first threaded structures, and the first anchor heads and the first threaded structures are used to connect the balance plate and the limit plate.

Images