Soft soil roadbed structure for preventing differential settlement

Abstract

The utility model relates to a soft soil roadbed structure for preventing differential settlement, which comprises a bottom soil body, a sand cushion layer, a settlement layer and a foam concrete layer which are sequentially arranged from bottom to top, a plurality of cement mixing piles in a rectangular array are arranged in the bottom soil body, and back pressure guard plates are arranged on the two sides of the upper side of the settlement layer and the two sides of the upper side of the foam concrete layer. A set of sliding grooves are formed in the lower sides of the two back pressure protection plates, the number of the sliding grooves in the set is two, every two cement mixing piles form a set, the upper sides of at least two sets of cement mixing piles are fixedly connected with settlement rods, the back pressure protection plates are vertically and slidably connected to the outer sides of the settlement rods through the sliding grooves, and a pre-positioning support is installed between the two settlement rods. When a soft soil roadbed is constructed, the back pressure protection plate can be simply installed on the outer side of the settlement rod, and the construction difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the soft soil roadbed technical field, and specifically relates to a soft soil roadbed structure capable of preventing uneven settlement. BACKGROUND

[0002] In the field of road construction, the treatment of soft soil roadbed has always been a key and challenging task. Soft soil has characteristics such as high water content, large compressibility, and low strength. Building a roadbed on it can easily cause uneven settlement problems, which not only affects the flatness of the road and the driving comfort, but also can seriously threaten the structural safety of the road, greatly shorten the service life of the road, and increase the maintenance cost and repair difficulty in the later period.

[0003] There are many traditional soft soil roadbed treatment methods. For example, a soft soil roadbed structure capable of preventing uneven settlement is disclosed in Chinese patent No. CN215758306U. The load generated by the foam concrete layer can extrude the settlement layer from both sides, so that the foam concrete layer maintains uniform settlement and avoids cracking of the foam concrete layer.

[0004] However, in actual construction, the two sliding grooves on the counter-pressure guard need to be opposite to the two settlement rods in order to install the counter-pressure guard on the settlement rod. However, it is difficult to adjust the settlement rod after it is fixed, and the positions of the two settlement rods cannot be accurately opposite to the sliding grooves during fixation, which makes it difficult to install the counter-pressure guard, thereby greatly increasing the difficulty of construction. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a soft soil roadbed structure capable of preventing uneven settlement, which can simply install the counter-pressure guard outside the settlement rod during construction of the soft soil roadbed, thereby reducing the difficulty of construction.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A soft soil roadbed structure capable of preventing uneven settlement includes a bottom soil body, a sand cushion layer, a settlement layer, and a foam concrete layer arranged from bottom to top. A plurality of cement mixing piles in a rectangular array are arranged in the bottom soil body. Counter-pressure guards are arranged on both sides of the upper side of the settlement layer and the foam concrete layer. A group of sliding grooves is opened on the lower side of each counter-pressure guard. The number of the group of sliding grooves is two. Two cement mixing piles form a group. At least two groups of cement mixing piles are fixedly connected with settlement rods on the upper side. The counter-pressure guards are vertically slidably connected to the outside of the settlement rods through the sliding grooves. A pre-positioning support is installed between the two settlement rods.

[0008] Further, the pre-positioning support comprises a connecting rod, outer sleeves are fixedly connected to two ends of the connecting rod, and the two outer sleeves are slidably connected to the outer sides of the two settlement rods respectively.

[0009] Further, the connecting rod comprises a main sleeve, two extension sliding plates are slidably connected to the inside of the main sleeve, and the connecting ends of the two extension sliding plates are away from each other, the connecting ends of the two extension sliding plates extend to the outside of the main sleeve and are fixedly connected with the outer sleeves, and the two ends of the extension sliding plates are threadedly connected with first locking screws.

[0010] Further, the outer side of the outer sleeve is fixedly connected with a connecting sleeve, the connecting sleeve is slidably connected to the outside of the connecting end of the extension sliding plate, and the connecting sleeve is threadedly connected with a second locking screw.

[0011] The technical effects achieved by the soft soil subgrade structure for preventing uneven settlement are as follows.

[0012] The pre-positioning support is arranged between the two settlement rods, the distance and the included angle between the two settlement rods can be controlled through the pre-positioning support, so that the two settlement rods can be simply fixed and matched with the two sliding grooves on the counter-pressure guard plate after being fixed, and the counter-pressure guard plate can be simply and slidably connected to the outer sides of the two settlement rods through the sliding grooves, thereby reducing the construction difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the utility model;

[0014] Figure 2 is a sectional structure schematic view of the utility model;

[0015] Figure 3 is a local explosion structure schematic view of the utility model;

[0016] Figure 4 is a structural schematic view of the pre-positioning support of the utility model.

[0017] In the drawings, the components represented by the numbers are listed as follows:

[0018] 1, bottom soil body; 2, sand cushion layer; 3, settlement layer; 4, foam concrete layer; 5, counter-pressure guard plate; 6, cement mixing pile; 7, settlement rod; 8, sliding groove; 9, pre-positioning support; 10, main sleeve; 11, extension sliding plate; 12, connecting sleeve; 13, outer sleeve; 14, first locking screw; 15, second locking screw; 16, third locking screw; 17, positioning hole. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the utility model more clear and obvious, the utility model is specifically explained below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model and does not strictly limit the protection scope of the utility model specifically requested.

[0020] As Figures 1-4 shown, a soft soil subgrade structure for preventing uneven settlement comprises a bottom soil body 1, a sand cushion layer 2, a settlement layer 3 and a foam concrete layer 4, the bottom soil body 1, the sand cushion layer 2, the settlement layer 3 and the foam concrete layer 4 are sequentially arranged from bottom to top, a plurality of cement mixing piles 6 in a rectangular array are arranged in the bottom soil body 1, the cement mixing piles 6 correspond to the sand cushion layer 2, two anti-pressure guard plates 5 are arranged on the two sides of the upper side of the settlement layer 3 and the foam concrete layer 4, a group of sliding grooves 8 are dug on the lower side of the two anti-pressure guard plates 5, the two cement mixing piles 6 form a group, and the upper side of at least two groups of cement mixing piles 6 is fixedly connected with a settlement rod 7;

[0021] The number of the group of sliding grooves 8 is two, the settlement rod 7 is inserted into the inside of the sliding groove 8, so that the anti-pressure guard plate 5 is vertically and slidingly connected to the outside of the settlement rod 7 through the sliding groove 8;

[0022] When working, the cement mixing piles 6 are punched into the bottom soil body 1, the cement mixing piles 6 make the bottom soil body 1 harden into a high-quality foundation with integrity, water stability and certain strength, then the sand cushion layer 2 is filled, the sand cushion layer 2 has the effect of horizontal drainage, the water in the bottom soil body 1 is drained, the settlement development of the bottom soil body 1 is accelerated, and the settlement of the bottom soil body 1 is more uniform, then the settlement layer 3 and the foam concrete layer 4 are continuously arranged on the upper side of the sand cushion layer 2, the foam concrete layer 4 is located on the settlement layer 3, the settlement layer 3 is pressed downward under the load action of the foam concrete layer 4, the two anti-pressure guard plates 5 press the foam concrete layer 4 and the settlement layer 3 at the same time, the two anti-pressure guard plates 5 increase the load of the overall structure of the subgrade, the pressure of the two anti-pressure guard plates 5 acts on the foam concrete layer 4 and the settlement layer 3, the load of the foam concrete layer 4 makes the soil on the settlement layer 3 move to the two sides, the two anti-pressure guard plates 5 press the foam concrete layer 4 through the two groups of sliding grooves 8 and the two groups of settlement rods 7, so that the foam concrete layer 4 is uniformly settled, the cracking phenomenon of the surface of the foam concrete layer 4 is reduced, the two groups of settlement rods 7 and the two groups of sliding grooves 8 have certain gaps on the inner walls of the upper ends, so that the foam concrete layer 4 pressed by the two anti-pressure guard plates 5 can have certain space for settlement, and the anti-pressure guard plates 5 are guided through the arrangement of the settlement rods 7.

[0023] Among them, as Figures 2-3As shown, in order to make the two settlement rods 7 fixed on the cement mixing pile 6 can be adapted to the sliding groove 8 on the counter-pressure guard plate 5, the technical scheme is installed between the two settlement rods 7 with a pre-positioning support 9, through the pre-positioning support 9 can control the spacing and the included angle between the two settlement rods 7, so that the two settlement rods 7 can be relatively simple to make fixed after the completion of the two sliding groove 8 on the counter-pressure guard plate 5 can be adapted to, so that the counter-pressure guard plate 5 can be relatively simple through the sliding groove 8 sliding connection in the two settlement rods 7 outside.

[0024] Specifically, as Figures 3-4 As shown, the pre-positioning support 9 includes a connecting rod, both ends of the connecting rod are fixedly connected with the outer sleeve 13, the two outer sleeves 13 are slidingly connected on the outside of the two settlement rods 7, at this time, the two settlement rods 7 can be limited by the two outer sleeves 13.

[0025] Among them, the outer sleeve 13 can be threadedly connected with the third locking screw 16, the end of the third locking screw 16 can be moved to the inside of the outer sleeve 13 and the settlement rod 7, so that the settlement rod 7 and the outer sleeve 13 can be connected as an integral structure, and the two settlement rods 7 can be provided with a plurality of positioning holes 17 equidistantly arranged along the axis direction of the settlement rod 7, and the third locking screw 16 extends into the positioning hole 17, so that the settlement rod 7 and the outer sleeve 13 can be locked, and by selecting the third locking screw 16 inserted into the corresponding positioning hole 17, the two settlement rods 7 can be arranged at the same height.

[0026] Among them, the connecting rod can be a straight rod, or as Figures 3-4 As shown, that is, the connecting rod includes a main sleeve 10, the inside of the main sleeve 10 is slidingly connected with two extension slides 11, and the ends of the two extension slides 11 away from each other are connected ends, the connected ends of the two extension slides 11 are extended to the outside of the main sleeve 10 and fixedly connected with the outer sleeve 13, at this time, by sliding the extension slide 11, the spacing between the two outer sleeves 13 can be adjusted to adapt to the spacing between the two sliding grooves 8, and the ends of the extension slide 11 are threadedly connected with the first locking screw 14, and the position of the extension slide 11 can be locked by the first locking screw 14.

[0027] At the same time, the number of outer sleeves 13 is multiple, the outer side of the outer sleeve 13 is fixedly connected with the connecting sleeve 12, the connecting sleeve 12 is slidingly connected on the outside of the connected end of the extension slide 11, and the second locking screw 15 is threadedly connected on the connecting sleeve 12, at this time, the models of the multiple outer sleeves 13 are different, and the model of the outer sleeve 13 can be replaced according to the model of the settlement rod 7.

[0028] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application. Structures, devices and operation methods not specifically described and explained in the present application are implemented according to conventional means in the art, unless otherwise specified and limited.

Claims

1. A soft soil subgrade structure for preventing uneven settlement, characterized by: The utility model relates to a kind of cement mixing pile foundation, including bottom soil body (1) sequentially arranged from bottom to top, sand cushion (2), settlement layer (3) and foam concrete layer (4), the bottom soil body (1) is provided with multiple cement mixing piles (6) in rectangular array, both sides of the upper side of settlement layer (3) and foam concrete layer (4) are provided with counter-pressure guard plate (5), the lower side of two counter-pressure guard plates (5) is excavated with a group of sliding grooves (8), the number of a group of sliding grooves (8) is two, two cement mixing piles (6) are a group, the upper side of at least two groups cement mixing piles (6) is fixedly connected with settlement rod (7), counter-pressure guard plate (5) is vertically slidably connected on the outside of settlement rod (7) by sliding groove (8), pre-positioning support (9) is installed between two settlement rods (7).

2. The soft soil subgrade structure for preventing uneven settlement according to claim 1, wherein: The pre-positioning support (9) includes a connecting rod, the two ends of the connecting rod are fixedly connected with outer sleeves (13), and the two outer sleeves (13) are slidably connected on the outside of the two settlement rods (7), respectively.

3. The soft soil subgrade structure for preventing uneven settlement according to claim 2, characterized by: The outer sleeve (13) is threadedly connected with a third locking screw (16).

4. The soft soil subgrade structure for preventing uneven settlement according to claim 3, wherein: A plurality of positioning holes (17) are formed on the two settlement rods (7), which are equidistantly arranged along the axis direction of the settlement rod (7).

5. The soft soil subgrade structure for preventing uneven settlement according to claim 2, wherein: The connecting rod includes a main sleeve (10), two extension slides (11) are slidably connected in the main sleeve (10), and the ends of the two extension slides (11) away from each other are connected ends, the connected ends of the two extension slides (11) are extended to the outside of the main sleeve (10) and fixedly connected with the outer sleeves (13), and the two ends of the extension slide (11) are threadedly connected with first locking screws (14).

6. The soft soil subgrade structure for preventing uneven settlement according to claim 5, wherein: The outer side of the outer sleeve (13) is fixedly connected with a connecting sleeve (12), the connecting sleeve (12) is slidably connected on the outside of the connected end of the extension slide (11), and the connecting sleeve (12) is threadedly connected with a second locking screw (15).

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