CN211552813U - Planar elevation measurement control point device for expansive soil area - Google Patents
Planar elevation measurement control point device for expansive soil area Download PDFInfo
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- CN211552813U CN211552813U CN202020047108.7U CN202020047108U CN211552813U CN 211552813 U CN211552813 U CN 211552813U CN 202020047108 U CN202020047108 U CN 202020047108U CN 211552813 U CN211552813 U CN 211552813U
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Abstract
The utility model provides an inflation land district plane elevation measurement control point device, the device includes: outer mold matrix tube: along the length direction, a first section of the material is filled with a first filler, and a second section of the material is filled with a second filler; a bearing core: inserting the first and second fillers; closing the cover: closing the port; the first filler is a flexible filler, and the second filler is a rigid filler. The device packs flexible filler in the base member pipe in the inflation soil layer, constitutes the buffering area for the deformation that the inflation soil layer caused because of the loss of water or absorb water of buffering, the installation rate is fast, and the quality is controllable, easy operation.
Description
Technical Field
The utility model relates to a geological survey technical field especially relates to an inflation land area plane elevation measurement control point device.
Background
The elevation measurement control point is a datum point for measuring and positioning infrastructure construction, and during construction, the accuracy of the datum point influences the construction quality of the whole project and whether the project can be used after completion and acceptance. The elevation measurement control point is a reference for measuring paying-off and elevation calculation, and secondary points or broken part points are led out outwards by taking the point as the reference in engineering construction.
In the conventional construction at present, marking and burying stones are a common method, specifically, shallow pits are dug on the ground, cement mortar is poured, then a base point device is installed, and finally cement is maintained.
But in tropical expansive soil areas, the soil in dry seasons loses water and shrinks, the width of the crack of the expansive soil reaches 10-40mm, the depth exceeds 1000mm, and meanwhile, ground settlement occurs; in rainy season, the soil expands when meeting water, cracks disappear, and the ground elevation rises. The position and the elevation stability of an elevation control point cannot be ensured by adopting the conventional method in the expansive soil area. In addition, due to engineering construction, control points are easily damaged and cannot be utilized due to landfill.
Chinese utility model 201010540446.5 discloses a deep pile that buries of freeze thawing area plane elevation control point and method of burying underground, the sighting rod comprises steel and cement protection tube on its upper portion and the fine sand filling layer between and, the sliding construction between steel protection tube and the sighting rod and the cement mortar protective layer, stem, the mud top layer of sighting rod. The embedding method comprises the steps of digging an upper pile hole, embedding a cement protection pipe, drilling, placing a marker post, injecting cement mortar, setting a sliding structure, fixing a base point measuring mark and the like. The patent can control the melting and sinking amount within an allowable range for melting and sinking and strong melting and sinking areas, and particularly the embedding depth of the marker post can be adjusted to reach a gravel soil layer below the freezing depth according to the freezing depth. But this utility model structure is comparatively complicated, and work efficiency is not high, and measurement control point is poor in the land district suitability that expands moreover.
Chinese utility model patent 201310154236.6 discloses a soft soil area plane elevation measurement control point, the sighting rod comprises the stem that its cement mortar constitutes, and the sighting rod bottom is buried underground to closely knit sand layer or solid holding power layer, exposes in the partial sighting rod cover more than ground and is equipped with the steel protection pipe, and the concrete pier has been pour to the steel protection pipe periphery. The utility model is suitable for a plane elevation of weak soil area buries measurement control point deeply underground. But cannot solve the horizontal and vertical deformation caused by dry shrinkage and wet expansion in expansive soil areas.
In the prior art, no elevation measurement control point device which can be applied to expansive soil areas exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to, to the chance water shrink in inflation soil area, the dehydration inflation characteristic, provide one kind and be applicable to inflation soil area plane elevation measurement control point device and bury the method underground.
In order to achieve the above object, the utility model discloses a technical scheme be:
native area plane elevation measurement control point device expands includes:
outer mold matrix tube: the outer die base pipe is divided into a first section and a second section along the length direction of the base pipe, a first filler is filled in the first section of the outer die base pipe, and a second filler is filled in the second section of the outer die base pipe;
a bearing core: the outer die base pipe is arranged in the base pipe along the length direction of the outer die base pipe and is inserted into the first filler and the second filler;
closing the cover: the first section of the outer mold base pipe is arranged at the position of a first section of a port, and the port is closed;
the first filler is a flexible filler, the second filler is a rigid filler, and when the soil stabilizer is used, the first filler is located in an expansive soil layer and the second filler is located in a stable soil layer.
Preferably, the method comprises the following steps: the first filler adopts polyphenyl particles, and the second filler adopts cement mortar.
Preferably, the method comprises the following steps: the first filler is filled to the boundary of the expansive soil layer and the stable soil layer.
Preferably, the method comprises the following steps: and a sealing plug is arranged on the sealing cover and is inserted into the first section port of the base pipe.
Preferably, the method comprises the following steps: after the first filler is filled, a gap exists between the end face of the first filler and the position of the first end port of the outer die base tube, the bearing core extends out of the first filler, and the end head of the bearing core is positioned in the gap.
Preferably, the method comprises the following steps: the end of the bearing core is provided with a magnetic mark.
Preferably, the method comprises the following steps: and a measuring reference ball is arranged at the end head of the bearing core.
Preferably, the method comprises the following steps: after the first filler is filled, a gap exists between the end face of the filler and the position of the first section of the port of the outer die base pipe, and a sealing element is arranged in the gap to seal the first filler.
Preferably, the method comprises the following steps: the seal is a flexible seal.
Preferably, the method comprises the following steps: and a handle is arranged at the upper end of the closing cover.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
the utility model provides an elevation measurement point controlling means suitable for inflation soil area packs flexible filler in the base member pipe intussuseption on inflation soil layer, constitutes the buffering area for the deformation that the inflation soil layer caused because of the desiccation or absorb water of buffering. The device modularizes the measuring device, can be customized and finished before construction, and has the characteristics of environmental protection, high speed, controllable quality, simple operation and the like.
Drawings
FIG. 1 is a schematic structural view of an elevation measurement control point device according to the present invention;
in the above figures:
1-external mold base pipe; 2-a load-bearing core; 3-closing the cover; 4-swelling soil layer; 5-stabilizing the soil layer; 6-polyphenyl particles; 7-cement mortar; 8-a handle; 9-a closing plug; 10-earth surface; 11-cement mortar; 12-fine sand; 13-measuring a reference sphere; 14-a magnetic target; 15-sealing member.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It will be understood that when an element is referred to as being "disposed on," "connected to," or "secured to" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The utility model provides a be applicable to inflation soil district plane elevation measurement control point device. The geological characteristics of the expansive soil map are that from the earth surface to the bottom, the expansive soil or the easily deformable soil layer is firstly, and the stable soil layer is arranged below the expansive soil or the easily deformable soil layer. Wherein, the expansive soil or the easily deformable soil layer can absorb water to expand in rainy season and lose water to shrink in dry season, and the deformation of the soil layer is large in rainy season and dry season.
The device for the planar elevation measurement control point in the expansive soil area is designed according to the characteristics of expansive soil and comprises an outer die base body pipe 1, a bearing core 2 and a closing cover 3.
Outer mold base pipe 1: a plastic round pipe or a steel wire rubber round pipe with certain elasticity, hardness and rigidity and good oxidation resistance is adopted as the outer mold base body pipe 1; along the length direction of the outer die base pipe 1, the outer die base pipe 1 is divided into a first section and a second section, the first section of the outer die base pipe 1 is filled with a first filler, and the second section of the outer die base pipe 1 is filled with a second filler. In use, the first filler is located in the swelling soil layer and the second filler is located in the stabilizing soil layer. After the outer mold base pipe 1 is inserted into the soil layer, the first section is positioned in the expansive soil layer 4, and the second section is positioned in the stable soil layer 5. Accordingly, the filling length of the filling needs to be adapted to the thickness of the intumescent layer 4. Under different geological conditions, the thickness of the expansion map layer 4 is different, so the length proportion of the first section and the second section is different when the expansion map layer is specifically applied to the external mold base body pipes under different geological conditions, and the length of the first section needs to be filled with a first filler to the boundary of the expansion soil layer 4 and the stable soil layer 5. The bearing core 2: the bearing core 2 is made of a prefabricated cement steel pipe or a solid steel pipe and needs to have higher rigidity; the bearing core 2 is arranged in the outer die base pipe 1 along the length direction of the outer die base pipe 1 and is inserted into the first filler and the second filler; the length of the carrier core 2 is shorter than the length of the outer mould base tube 1.
And (3) closing cover: the outer mould base body pipe is arranged at the position of a first section of port of the outer mould base body pipe 1, and the port is closed; the closed cover 3 is made of a circular or square top cover made of reinforced precast concrete and serves as a protective cover; a handle 8 is arranged at the upper end of the closing cover 3, and the handle 8 is used for operation; a sealing plug 9 is arranged on the lower side of the sealing cover 3, the height of the sealing plug 9 is about 50-100 mm, the sealing plug 9 is plugged into the port of the outer die base pipe 1, the base pipe 1 is better sealed, and rainwater is prevented from entering the measuring control point device. The control point number, the measuring unit and the construction date are drawn on the upper surface of the control point closing cover 3, and the control point closing cover is convenient for the construction unit to use.
Furthermore, the first filler is a flexible filler, and the second filler is a rigid filler. Specifically, in the present embodiment, the first filler is formed of polyphenyl granules 6, the filler layer serves as a deformation isolation filler zone, the second filler is formed of cement mortar 7, and the filler layer serves as a stable embedding terminal. Since the polyphenyl granules 6 have enough flexibility, deformation can occur when the soil layer contracts, expands and deforms. The deformation isolation filling belt composed of the polyphenyl particles 6 can dehydrate and shrink the expansive soil, and the soil deformation caused by water expansion is effectively isolated from the bearing core 2, so that the horizontal and vertical deformation of the expansive soil or the easily deformed soil layer caused by environmental change is avoided. The cement mortar 7 filling layer has better rigidity than the polyphenyl granules 6, can be fixed in a stabilized soil body after being inserted into a stabilized soil layer, effectively keeps stable, does not deform vertically or horizontally, and plays a main role in the stability of the whole height measurement control point device.
Besides the polyphenyl granules, the first filler can also adopt TPE (thermoplastic elastomer) elastic granules and ETPU (ethylene-propylene-diene monomer) granules (granular materials with elasticity, portability and fluidity); besides cement mortar, the second filler can also adopt lime-soil, concrete and polyurethane foaming agent.
Furthermore, after the first filler is filled, a gap exists between the end face of the filler and the position of the first section of the port of the outer die substrate tube 1, a sealing member 15 is arranged on the surface of the first filler, and the sealing member 15 encloses the polyphenyl granule 6 filling layer. The carrier core 2 extends out of the first filler and the end of the carrier core 2 is located in the gap between the seal 15 and the end of the outer die substrate tube 1.
In order to enable the height measurement control point device to be searched, a magnetic mark 14 is arranged at the end head of the bearing core 2, and the height measurement control point device can be searched through the magnetic mark 14 in the field.
Meanwhile, a measuring reference ball 13 is arranged at the end part of the bearing core 2 for assisting the measuring operation. The distance between the measuring reference ball 13 and the earth surface is 300-600 mm, and the space is enough, so that when the earth surface machinery rolls the control point position, the space between the earth surface and the measuring reference ball 13 inevitably causes damage to the control point by the machinery.
The utility model provides an installation method of elevation measurement control point device as follows.
Firstly, geological survey is needed, the thickness of an expansive soil layer or an easily deformable soil layer of an engineering field area to be installed is known, and the top elevation of a stable soil body is known. And determining the length of the stable embedded end (fine sand filling layer) and the length of the deformation isolation filling belt (polyphenyl foam particle filling layer) by combining the geological survey result, and ensuring that the thickness of the deformation isolation filling belt is not less than that of the expansive soil layer or the easily deformable soil layer.
The length of the stable embedding end is designed according to the top elevation of the stable soil body, and the length of the deformation isolation filling belt is designed according to the thickness of the expansive soil layer or the easily deformable soil layer. And designing the total length of the measuring control point device according to the length of the stable embedded end and the safety length reserved at the port of the external mold matrix tube 1 by the length measuring reference ball 13 of the deformation isolation filling band.
A selected pipe material is cut according to the total length of a measuring control point device to form an outer mold base pipe 1, and a bearing core 3 with a measuring reference ball 13 and a magnetic mark 14 is inserted into the center of the outer mold base pipe 1.
And filling a second filler (adopting cement mortar 7 or concrete) into the outer mold base pipe 1 until the length of the stable embedded end is reached, and curing the concrete until the concrete is solidified to form the stable embedded end.
And filling a first filler (polyphenyl granules 6) into the outer die base pipe 1 to form a deformation isolation filling belt, and arranging a sealing element 15 at the top of the deformation isolation filling belt to fix the deformation isolation filling belt to finish the prefabrication of the measurement control point device.
During construction, a drilling machine or a Luoyang shovel and other tools are adopted to excavate a measurement control point mounting hole at a selected mounting point position, the depth of the mounting hole is consistent with that of a prefabricated measurement control point device, the aperture of the mounting hole is designed according to the outer diameter of the outer die base pipe 1 and needs to be 10-20mm larger than the outer diameter of the outer die base pipe 1, a gap is formed between the outer die base pipe 1 and the aperture of the mounting hole after insertion, and the aperture is usually 120 plus 180 mm. The depth of the mounting hole needs to penetrate through an expansive soil layer or an easily deformed soil layer.
And (3) inserting a prefabricated measurement control point device into the measurement control point mounting hole, firstly pouring a third filler (cement paste) into a hole between the measurement control point mounting hole and the measurement control point outer mold base body pipe 1, stopping pouring after the cement paste is poured to the top elevation of the stable soil body, and bonding the cement paste with the stable soil body to form an embedded and fixed belt after the cement is solidified.
And then filling fourth fillers (fine sand) in the residual holes between the mounting holes of the measurement control points and the outer mold base pipes 1 of the measurement control points, and forming outer-layer deformation buffer zones between the expansive soil or the easily-deformable soil layers and the outer mold base pipes 1 of the measurement control points. Wherein the fourth filling is more flexible than the third filling.
The length of the third filler corresponds to the length of the first filler, both being equal or within a certain threshold. The fourth filler is filled directly to the position of the outer mold base tube port.
After the measuring control point device is installed on a soil layer, the earth surface is leveled, and finally, a prefabricated control point sealing protective cover is installed to protect the control point.
The utility model provides a measuring device, with the measuring device modularization, the customization is accomplished before can constructing, has the environmental protection, and is fast, and the quality is controllable, characteristics such as easy operation.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. An expansive ground area planar elevation measurement control point device, comprising:
outer mold matrix tube: the outer die base pipe is divided into a first section and a second section along the length direction of the base pipe, a first filler is filled in the first section of the outer die base pipe, and a second filler is filled in the second section of the outer die base pipe;
a bearing core: the outer die base pipe is arranged in the base pipe along the length direction of the outer die base pipe and is inserted into the first filler and the second filler;
closing the cover: the first section of the outer mold base pipe is arranged at the position of a first section of a port, and the port is closed;
the first filler is a flexible filler, the second filler is a rigid filler, and when the soil stabilizer is used, the first filler is located in an expansive soil layer and the second filler is located in a stable soil layer.
2. The expansive soil area planar elevation measurement control point device of claim 1, wherein: the first filler adopts polyphenyl foam, and the second filler adopts cement mortar.
3. The expanded ground area planar elevation measurement control point apparatus of claim 1 or 2, wherein: the first filler is filled to the boundary of the expansive soil layer and the stable soil layer.
4. The expansive soil area planar elevation measurement control point device of claim 1, wherein: and a sealing plug is arranged on the sealing cover and is inserted into the first section port of the base pipe.
5. The expansive soil area planar elevation measurement control point device of claim 1, wherein: after the first filler is filled, a gap exists between the end face of the first filler and the position of the first section of the port of the outer die base pipe, the bearing core extends out of the first filler, and the end head of the bearing core is positioned in the gap.
6. The expansive soil area planar elevation measurement control point device of claim 5, wherein: the end of the bearing core is provided with a magnetic mark.
7. The expansive soil area planar elevation measurement control point device of claim 5, wherein: and a measuring reference ball is arranged at the end head of the bearing core.
8. The expansive soil area planar elevation measurement control point device of claim 1, wherein: after the first filler is filled, a gap exists between the end face of the filler and the position of the first section of the port of the outer die base pipe, and a sealing element is arranged in the gap to seal the first filler.
9. The expansive soil area planar elevation measurement control point apparatus of claim 8, wherein: the seal is a flexible seal.
10. The expansive soil area planar elevation measurement control point device of claim 1, wherein: and a handle is arranged at the upper end of the closing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020047108.7U CN211552813U (en) | 2020-01-09 | 2020-01-09 | Planar elevation measurement control point device for expansive soil area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020047108.7U CN211552813U (en) | 2020-01-09 | 2020-01-09 | Planar elevation measurement control point device for expansive soil area |
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| CN211552813U true CN211552813U (en) | 2020-09-22 |
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| CN202020047108.7U Active CN211552813U (en) | 2020-01-09 | 2020-01-09 | Planar elevation measurement control point device for expansive soil area |
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