阅读说明：本技术 新建高速公路工程软弱地基加固处理方法 (Method for reinforcing and treating soft foundation of newly-built highway engineering ) 是由 王伟 杨守庄 付晨辉 魏丽松 刘琳 刘立校 张希来 石占强 李广 王燕 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种新建高速公路工程软弱地基加固处理方法,包括如下步骤：步骤1、软弱地基的两侧设置第一隔水板,第一隔水板之间横向均匀的设置多个第二隔水板,以将软弱地基沿纵向分隔为多个加固组；步骤2、在加固组内设置分隔板,并使分隔板呈连续S型曲线设置；在分隔板之间的间隙内设置管桩,前后管桩交错设置；步骤3、与管桩相对的一侧,深层多次喷射混合后的水泥；步骤4、喷射完成后,在加固组的顶端依次铺设两层钢丝网架、稻草层、土工格栅、级配碎石层以及沥青层,以完成对软弱地基的加固。本发明施工工序简捷,有效防止路面下沉,同时便于后期道路的局部维修。(The invention discloses a method for reinforcing a soft foundation of a newly-built highway engineering, which comprises the following steps: step 1, arranging first water-stop sheets at two sides of a soft foundation, and transversely and uniformly arranging a plurality of second water-stop sheets between the first water-stop sheets so as to longitudinally divide the soft foundation into a plurality of reinforcing groups; step 2, arranging partition plates in the reinforcing groups, and enabling the partition plates to be arranged in a continuous S-shaped curve; tubular piles are arranged in gaps between the partition plates, and the front tubular piles and the rear tubular piles are arranged in a staggered mode; 3, spraying the mixed cement on one side opposite to the pipe pile for multiple times in a deep layer; and 4, after the spraying is finished, sequentially laying two layers of steel wire mesh frames, a straw layer, a geogrid, a graded gravel layer and an asphalt layer at the top end of the reinforcing group so as to finish the reinforcement of the soft foundation. The invention has simple and direct construction process, effectively prevents the pavement from sinking and is convenient for the local maintenance of the later road.)

1. A reinforcement treatment method for a soft foundation of a newly-built highway engineering comprises the following steps:

step 1, arranging first water-stop sheets at two sides of a soft foundation, which are attached to the soft foundation, in the soft foundation, transversely and uniformly arranging a plurality of second water-stop sheets between the first water-stop sheets, wherein two sides of each second water-stop sheet are abutted against the corresponding first water-stop sheet so as to longitudinally divide the soft foundation into a plurality of reinforcing groups; the heights of the first water-stop sheet and the second water-stop sheet are equal to the depth of the soft foundation;

step 2, arranging partition plates in the reinforcing groups, enabling the partition plates to be arranged in a continuous S-shaped curve, enabling the head ends and the tail ends of the partition plates to respectively abut against the front and back adjacent second water-stop plates, and enabling the two sides of the partition plates to respectively abut against the first water-stop plates; tubular piles matched with the gaps are arranged in the gaps between the partition plates, and the front tubular piles and the rear tubular piles are arranged in a staggered mode;

step 3, deeply and repeatedly spraying mixed cement on one side, opposite to the tubular pile, of the gap between the partition plates;

and 4, after the injection is finished, laying two layers of steel wire mesh frames on the top ends of the first water-stop plate, the second water-stop plate and the partition plate, and sequentially laying a straw layer, a geogrid, a graded gravel layer and an asphalt layer on the steel wire mesh frames so as to finish the reinforcement of the soft foundation.

2. The method for reinforcing and treating the soft foundation of the newly-built expressway engineering of claim 1, wherein the first and second water-stop plates have the same structure, each of the first and second water-stop plates comprises a rectangular steel frame made of steel pipes and a water-stop layer arranged in the middle of the rectangular steel frame, the bottom end of the rectangular steel frame is arranged in a conical structure, and the top end of the rectangular steel frame is provided with a steel plate adapted to the width of the rectangular steel frame.

3. The method for reinforcing and treating the soft foundation of the newly-built expressway engineering as recited in claim 1, wherein the distance between the front and rear curves of the partition plate in step 2 is set to be 25-35 cm, and the height of the partition plate is equal to the height of the first and second water-stop plates.

4. The method for reinforcing and treating the soft foundation of the newly-built expressway engineering as recited in claim 1, wherein the concrete method of spraying the mixed cement in the deep layer for multiple times in step 3 mainly comprises the following steps:

step 4.1, spraying from the bottom end of the soft foundation, wherein the distance between the position of the first spraying and the tubular pile is 10-20 cm;

4.2, moving the pipe pile to one side far away from the pipe pile after the first spraying, and performing second spraying at the position with the same depth as the first spraying after moving by 10-20 cm, wherein the route of the spraying path is S-shaped;

and 4.3, repeating the step 4.2 until the spraying path reaches the first water-stop plate, and spraying layer by layer until the spraying layer by layer height reaches the top end of the tubular pile.

5. The method for reinforcing and treating the soft foundation of the newly-built expressway engineering as recited in claim 1, wherein the two steel wire frames laid in the step 4 are arranged in a staggered manner.

6. The method for reinforcing the soft foundation of the newly-built expressway engineering according to claim 1, wherein the distance between the adjacent second water-stop sheets in step 1 is set to 1 to 1.5 m.

7. The method for reinforcing the soft foundation of the newly-built expressway engineering as recited in claim 1, wherein the step 2 further comprises the step of arranging a reinforcing plate in the gap between the partition plates in the middle of the partition plates and in the longitudinal direction of the partition plates.

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a reinforcement treatment method for a soft foundation of a newly-built highway engineering.

Background

With the development of socioeconomic, the highway is the inevitable product of the socioeconomic development, has become the mark of modern traffic, and is an important mark for measuring the modernization level of national highway transportation and automobile industry. The highway plays a significant role in the world road transportation and the national economic development of all countries. In order to provide the utilization rate of the expressway and reduce the influence of road maintenance on traveling, the stability of a foundation where the expressway is built and the convenience of later-stage road maintenance need to be guaranteed when the expressway is built, so that when the expressway is built on a soft foundation, the soft foundation needs to be reinforced in the first step to avoid the reduction of the service life of the road caused by the settlement of the road, and meanwhile, the convenience of later-stage road maintenance needs to be considered.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

The invention also aims to provide a method for reinforcing and treating the soft foundation of the newly-built highway engineering, which has the advantages of simple construction process, low cost investment, effective prevention of road surface sinking and convenience for local maintenance of later roads.

To achieve these objects and other advantages in accordance with the present invention, there is provided a method for reinforcing a soft foundation of a newly constructed highway engineering, comprising the steps of:

step 1, arranging first water-stop sheets at two sides of a soft foundation, which are attached to the soft foundation, in the soft foundation, transversely and uniformly arranging a plurality of second water-stop sheets between the first water-stop sheets, wherein two sides of each second water-stop sheet are abutted against the corresponding first water-stop sheet so as to longitudinally divide the soft foundation into a plurality of reinforcing groups; the heights of the first water-stop sheet and the second water-stop sheet are equal to the depth of the soft foundation.

Step 2, arranging partition plates in the reinforcing groups, enabling the partition plates to be arranged in a continuous S-shaped curve, enabling the head ends and the tail ends of the partition plates to respectively abut against the front and back adjacent second water-stop plates, and enabling the two sides of the partition plates to respectively abut against the first water-stop plates; set up in the clearance between the division board with the tubular pile of clearance adaptation, front and back the tubular pile is crisscross to be set up.

And 3, deeply spraying the mixed cement for multiple times in the gap between the partition plates and on the side opposite to the tubular pile.

And 4, after the injection is finished, laying two layers of steel wire mesh frames on the top ends of the first water-stop plate, the second water-stop plate and the partition plate, and sequentially laying a straw layer, a geogrid, a graded gravel layer and an asphalt layer on the steel wire mesh frames so as to finish the reinforcement of the soft foundation.

Preferably, the first water-stop sheet and the second water-stop sheet have the same structure, the first water-stop sheet and the second water-stop sheet comprise cuboid steel frames formed by steel pipes and are arranged on the water-stop layer in the middle of the cuboid steel frames, the bottom of the cuboid steel frames is arranged to be of a conical structure, and the top ends of the cuboid steel frames are arranged on the steel plates matched with the width of the cuboid steel frames.

Preferably, in step 2, the distance between the front and rear curves of the partition plate is set to be 25-35 cm, and the height of the partition plate is equal to the height of the first water-stop sheet and the height of the second water-stop sheet.

Preferably, the concrete method for deep multi-time spraying the mixed cement in the step 3 mainly comprises the following steps:

and 4.1, spraying from the bottom end of the soft foundation, wherein the distance between the first spraying position and the tubular pile is 10-20 cm.

And 4.2, moving the pipe pile to one side far away from the pipe pile after the first spraying, and carrying out second spraying at the position with the same depth as the first spraying after moving by 10-20 cm, wherein the route of the spraying path is S-shaped.

And 4.3, repeating the step 4.2 until the spraying path reaches the first water-stop plate, and spraying layer by layer until the spraying layer by layer height reaches the top end of the tubular pile.

Preferably, the two steel wire mesh frames laid in the step 4 are arranged in a staggered manner.

Preferably, the distance between adjacent second water-stop sheets in step 1 is set to be 1-1.5 m.

Preferably, step 2 further comprises arranging a reinforcing plate in the middle of the partition plate, and arranging the reinforcing plate in the gap of the partition plate along the longitudinal direction of the partition plate.

The invention at least comprises the following beneficial effects:

according to the invention, the foundation is longitudinally divided into a plurality of reinforcing groups along the extension of the highway by using the first water-stop sheet and the second water-stop sheet, and each reinforcing group is reinforced respectively, so that the whole foundation is divided into a local reinforcing mode, thus the method is not only beneficial to the orderliness of reinforcement, but also beneficial to the renovation of roads in the later period, and the defect of road maintenance in large projects is avoided. The partition plates are arranged in each reinforcing group, so that the reinforcing groups are arranged in a continuous S-shaped curve, the integrity of the whole partition plate is utilized to keep the continuity and the strength of the whole partition plate, the curve type arrangement mode reduces the investment of the use cost of the partition plates while the reinforcing effect is ensured, and the partition plates are more effective, simple and labor-saving through the whole plate putting mode. Set up the tubular pile through the crisscross position in division board clearance to consolidate the division board, effectually consolidate the ground simultaneously, at the mode of the regional cement that sprays of opposite side relative through the tubular pile, reduce tubular material, utilize cement to carry out the reinforcement in the small region, and through deep reinforced mode, in order to guarantee reinforced effect. The top end of the reinforcing group is paved in a mode of paving a steel wire mesh frame, a straw layer, a geogrid, a grading gravel layer and an asphalt layer above the reinforcing group, so that the possibility of pavement settlement is reduced, and the construction of the foundation reinforced highway is completed.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a top view of the reinforcement group of the present invention;

fig. 2 is a transverse sectional view of the construction structure of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 and fig. 2, the invention provides a method for reinforcing a weak foundation of a newly-built highway engineering, which comprises the following steps:

step 1, arranging first water-stop sheets 10 at two sides of a soft foundation, which are attached to the soft foundation, in the soft foundation, transversely and uniformly arranging a plurality of second water-stop sheets 11 between the first water-stop sheets 10, wherein two sides of each second water-stop sheet 11 are abutted against the corresponding first water-stop sheet 10 so as to longitudinally divide the soft foundation into a plurality of reinforcing groups 1; the heights of the first water stop sheet 10 and the second water stop sheet 11 are equal to the depth of the soft foundation.

Step 2, arranging a partition plate 2 in the reinforcing group 1, enabling the partition plate 2 to be arranged in a continuous S-shaped curve, enabling the head end and the tail end of the partition plate 2 to respectively abut against the second water-stop plates 11 adjacent to each other in the front and at the back, and respectively abutting against the first water-stop plates 10 on the two sides of the partition plate 2; set up in the clearance between division board 2 with the tubular pile 21 of clearance adaptation, front and back tubular pile 21 sets up in a staggered way.

And 3, deeply spraying the mixed cement for multiple times in the gap between the partition plates 2 and on the side opposite to the tubular pile 21.

And 4, after the injection is finished, laying two layers of steel wire mesh frames 30 on the top ends of the first water-stop plates 10, the second water-stop plates 11 and the partition plates 2, and sequentially laying a straw layer 31, a geogrid 32, a graded gravel layer 33 and an asphalt layer 34 on the steel wire mesh frames 30 so as to finish the reinforcement of the soft foundation.

In the above scheme, through utilizing first water-stop sheet 10 and second water-stop sheet 11 to extend longitudinal separation along the highway with the ground and for a plurality of reinforcement group 1, strengthening every reinforcement group 1 respectively, will wholly divide into local reinforced mode, not only do benefit to reinforced orderliness, do benefit to the renovation of later stage road simultaneously, avoided the drawback of major engineering road maintenance. The partition plates 2 are arranged in each reinforcing group 1 and are arranged in a continuous S-shaped curve, the integrity of the whole partition plates 2 is utilized to keep the continuity and the strength of the whole partition plates, the curve type arrangement mode reduces the use cost of the partition plates 2 while the reinforcing effect is ensured, and the whole partition plate feeding mode is more effective, simple and labor-saving. Set up tubular pile 21 through the crisscross position in 2 clearances of division board to consolidate division board 2, effectually consolidate the ground simultaneously, reduce tubular material through the regional mode that sprays cement of the opposite side that tubular pile 21 is relative, utilize cement to carry out the reinforcement in the small region, and through deep reinforced mode, in order to guarantee reinforced effect. The top end of the reinforcing group 1 is paved in a mode of paving the steel wire mesh frame 30, the straw layer 31, the geogrid 32, the graded gravel layer 33 and the asphalt layer 34 above the reinforcing group 1, so that the possibility of pavement settlement is reduced, and the construction of the foundation reinforced highway is completed.

In an optimal scheme, first water-stop sheet 10 is the same with second water-stop sheet 11's structure, first water-stop sheet 10 and second water-stop sheet 11 all include the cuboid steelframe of constituteing by steel pipe 101 to and set up the water barrier 102 at cuboid steelframe middle part, the bottom of cuboid steelframe sets up to conical structure, the top of cuboid steelframe set up with the steel sheet 103 of cuboid steelframe width adaptation.

In the above scheme, constitute the cuboid steelframe through the combination of steel pipe 101, wrap up water barrier 102 wherein to avoid the deformation of water barrier 102, the setting of cuboid steelframe bottom conical structure is favorable to subsiding of cuboid steelframe, and is more convenient laborsaving. The steel plate 103 is beneficial to the stability of the whole structure of the cuboid steel frame, so that the reinforcing group 1 is formed.

In a preferable scheme, in step 2, a distance between front and back curves of the partition plate 2 is set to be 25-35 cm, and a height of the partition plate 2 is equal to a height of the first water-stop sheet 10 and a height of the second water-stop sheet 11.

In the above scheme, the distance between the front curve and the rear curve of the partition plate 2 is limited to be 25-35 cm, so that the reinforcement effect of the partition plate 2 in the reinforcement group 1 is guaranteed, the phenomenon that the reinforcement strength is insufficient due to an overlarge gap and the road surface is caused to sink is avoided, and the arrangement of the height of the partition plate 2 is convenient for forming a stable reinforcement area with the first water-stop plate 10 and the second water-stop plate 11.

In a preferred scheme, the concrete method for spraying the mixed cement for multiple times in the deep layer in the step 3 mainly comprises the following steps:

and 4.1, spraying from the bottom end of the soft foundation, wherein the distance from the first spraying position to the pipe pile 2110-20 cm.

And 4.2, moving the pipe pile 21 away from one side after the first injection, and performing second injection at the position with the same depth as the first injection after moving by 10-20 cm, wherein the route of the injection path is S-shaped.

And 4.3, repeating the step 4.2 until the spraying path reaches the first water-stop plate 10, and spraying layer by layer until the spraying layer by layer height reaches the top end of the tubular pile 21.

In the above-mentioned scheme, spray through the bottom from weak ground, be convenient for stabilize from the foundation, prevent the emergence of sinking, every layer sprays the mode with S type route path, when saving the cement quantity, the ground of at utmost in to the clearance is consolidated, the mode that advances layer by layer for the spraying of every layer all combines with the bottom, thereby form cement load-bearing structure, not only have very much the reinforcement effect, simultaneously very big reduction the cost of cement.

In a preferred scheme, the two layers of steel wire mesh frames 30 laid in the step 4 are arranged in a staggered manner.

In the above scheme, the two layers of steel wire mesh frames 30 are stacked in a staggered manner, so that the node of the upper layer of steel wire mesh frame 30 is supported in the gap between the upper layer of steel wire mesh frame 30 and the bottom layer of steel wire mesh frame 30, and the two layers of steel wire mesh frames 30 are mutually relayed, which is beneficial to increasing the bearing capacity.

In a preferable scheme, the distance between adjacent second water-stop sheets 11 in step 1 is set to be 1-1.5 meters.

In the above scheme, the distance between the second water-stop sheets 11 is set to be 1-1.5 meters, so that the size of each reinforcing group 1 is controllable, the longest distance of each reinforcing group is smaller than the length of a vehicle body in common running, the whole heavy vehicle body is prevented from falling into the reinforcing group 1, the two reinforcing groups 1 are guaranteed to bear the weight of the vehicle body, and the sinking of the road surface is avoided.

In a preferable scheme, the step 2 further comprises the step of arranging a reinforcing plate 22 in the middle of the partition plate 2 and in the gap of the partition plate 2 along the longitudinal direction of the partition plate 2.

In the above scheme, the reinforcing plate 22 located in each gap is arranged in the middle of the partition plate 2 along the longitudinal direction of the partition plate, and the reinforcing plate 22 is made of the corrosion-resistant steel plate 103 to support the middle of the gap of the partition plate 2, so as to ensure the strength of the partition plate 2 and reduce the deformation of the partition plate 2.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.