CN112302065A - Device and method for testing lateral pressure of cement-soil slurry - Google Patents
Device and method for testing lateral pressure of cement-soil slurry Download PDFInfo
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- CN112302065A CN112302065A CN202011321215.5A CN202011321215A CN112302065A CN 112302065 A CN112302065 A CN 112302065A CN 202011321215 A CN202011321215 A CN 202011321215A CN 112302065 A CN112302065 A CN 112302065A
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- soil
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- lantern ring
- lateral pressure
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- 239000002689 soil Substances 0.000 title claims abstract description 83
- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 239000002002 slurry Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009434 installation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a testing device for lateral pressure of cement soil slurry, which comprises a soil pressure box and a lantern ring, wherein the soil pressure box is fixed in the lantern ring, an insert is fixed at the bottom of the lantern ring, a through hole is formed in the top of the lantern ring, a fixed pipe is arranged at the through hole, the fixed pipe is detachably connected with an extension pipe, and a testing lead of the soil pressure box sequentially penetrates through the through hole and the fixed pipe and penetrates into the extension pipe. The invention also discloses a method for testing the lateral pressure of the cement-soil slurry. The invention fixes the soil pressure cell in the lantern ring with the cutting edge, is favorable for accurately arranging the soil pressure cell in the cement soil slurry to a certain depth, has accurate arrangement and high arrangement efficiency, simultaneously ensures that the soil pressure cell is vertical and the test lead is not damaged, improves the test precision, can recycle the soil pressure cell for reuse, and reduces the cost.
Description
Technical Field
The invention relates to the technical field of foundation pit engineering construction, in particular to a device and a method for testing lateral pressure of cement-soil slurry.
Background
In foundation pit engineering construction, in order to facilitate earth excavation or prevent a pit bottom from surging, the water level (diving) or the water pressure (micro confined water or confined water) of underground water in a foundation pit needs to be reduced. Because the precipitation in the pit can cause the underground water level outside the pit to drop, and further cause the settlement of peripheral buildings (structures) or underground pipelines, a fully-closed or suspended waterproof curtain is arranged at the periphery of the foundation pit to separate or control the hydraulic connection inside and outside the foundation pit, and the settlement of the peripheral buildings (structures) or underground pipelines caused by the precipitation in the pit is eliminated or reduced.
Cement soil piles (such as cement mixing piles, high-pressure jet grouting piles, MJS construction piles and the like) and cement soil walls (TRD construction walls, CSM construction walls and the like) are column-type or equal-thickness waterproof curtains commonly used in engineering. Any of the above waterproof curtains is a soil cement waterproof curtain formed by mixing cement paste with undisturbed soil using different construction tools and methods.
When the surrounding environment of the foundation pit is complex, the lateral pressure of the cement soil slurry needs to be known so as to analyze and research the influence of the cement soil waterproof curtain on adjacent buildings, pipelines and the like when the cement soil waterproof curtain is formed but not hardened. The mud lateral pressure test method comprises the following steps: the soil pressure cell is directly pressed into the preset depth of the slurry, the frequency transmitted by a lead of the soil pressure cell is measured and read by a frequency instrument (a secondary instrument), and the lateral pressure of the slurry at a certain depth is obtained by a corresponding calculation formula.
Because the cement soil mud has certain consistency, the soil pressure box is difficult to press in due to resistance if the soil pressure box is directly pressed into the soil pressure box to a certain depth during testing; even if the pressure plate can be pressed into a preset depth, the soil pressure box is difficult to be vertical or the lead is difficult to be damaged; after the test is completed, the soil pressure cell is difficult to recover.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a device and a method for testing the lateral pressure of cement-soil slurry.
In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:
the utility model provides a testing arrangement of cement soil mud lateral pressure, includes soil pressure cell, the lantern ring, soil pressure cell fixes the lantern ring is intra-annular, the bottom of the lantern ring is fixed with the plug-in components, the through-hole has been seted up at the top of the lantern ring, through-hole department is provided with the protection tube, soil pressure cell's test wire passes in proper order the through-hole just penetrates in the protection tube.
As a further improvement of the invention, at least two mounting holes are arranged on the lantern ring, a bolt is connected to each mounting hole, and the bolt is abutted to the soil pressure cell.
As a further development of the invention, the insert is a knife edge.
As a further improvement of the invention, the blade is fixed with the bottom of the lantern ring by welding.
As a further improvement of the present invention, the protection tube includes a fixed tube and an extension tube detachably connected to the fixed tube, the fixed tube is disposed at the through hole, and the extension tube includes at least one connection tube.
As a further improvement of the invention, the length of the connecting pipe is 0.8-1.2 m.
As a further improvement of the invention, the connecting pipe is a connecting steel pipe.
As a further improvement of the invention, the fixed pipe is fixed with the top of the lantern ring by welding.
As a further improvement of the invention, the fixed pipe is a fixed steel pipe.
A method for testing the lateral pressure of cement-soil mud by using the testing device comprises the following steps:
(1) fixing the soil pressure box in the sleeve ring, and enabling a test lead of the soil pressure box to penetrate through the through hole and penetrate into the protection tube;
(2) inserting the lantern ring into the cement-soil slurry through the plug-in unit, and testing the lateral pressure at different depths;
(3) and after the test is finished, pulling out the lantern ring, and taking out the soil pressure box.
The invention has the beneficial effects that:
the invention fixes the soil pressure cell in the lantern ring with the cutting edge, is favorable for accurately arranging the soil pressure cell in the cement soil slurry to a certain depth, has accurate arrangement and high arrangement efficiency, simultaneously ensures that the soil pressure cell is vertical and the test lead is not damaged, improves the test precision, can recycle the soil pressure cell for reuse, and reduces the cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a testing device in accordance with a preferred embodiment of the present invention;
FIG. 2 is a side view of a testing device in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a test method of a preferred embodiment of the present invention;
in the figure: 10. the soil pressure box comprises a soil pressure box body 12, a lantern ring 14, a through hole 16, a test lead wire 18, a bolt 20, a blade 22, a fixed pipe 24, a connecting pipe 26 and cement soil slurry.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, a testing device for lateral pressure of soil cement slurry comprises a soil pressure cell 10 and a lantern ring 12, wherein the soil pressure cell 10 is fixed in the lantern ring 12, so that the soil pressure cell 10 is kept in a vertical state during testing, a plug-in is fixed at the bottom of the lantern ring 12, the plug-in can be conveniently inserted into the soil cement slurry, a through hole 14 is formed in the top of the lantern ring 12, a protection pipe is arranged at the through hole 14, a testing lead 16 of the soil pressure cell 10 penetrates through the through hole 14 and the protection pipe, the testing lead 16 is protected by the protection pipe, and the testing lead 16 is prevented from being damaged.
According to the invention, the inner diameter of the lantern ring 12 is preferably slightly larger than the diameter of the soil pressure box 10, so that the soil pressure box 10 can be conveniently placed in the lantern ring 12. It is further preferable that the thickness of the collar 12 is slightly larger than the thickness of the soil pressure cell 10, to enhance the strength of the collar 12.
In order to facilitate the fixing of the soil pressure cell 10, the collar 12 is preferably provided with at least two mounting holes (not shown), each mounting hole is connected with a bolt 18, and the bolt 18 abuts against the soil pressure cell 10. It is further preferred that the mounting hole is a threaded hole, the bolt 18 is threadedly coupled to the mounting hole,
in order to facilitate pressing the test device into the cement slurry, the preferred insert of the present invention is a blade 20, which rapidly overcomes the resistance force via the blade 20, reduces the pressing time of the test device, and rapidly presses into the predetermined depth.
According to the invention, the cutting edge 20 is preferably welded and fixed with the bottom of the lantern ring 12, so that the stability of the cutting edge 20 and the lantern ring 12 is improved.
The preferred protection tube of the invention comprises a fixed tube 22 and an extension tube detachably connected with the fixed tube 22, wherein the fixed tube 22 is arranged at the through hole 14, and the extension tube comprises at least one connecting tube 24, so that cement mud can be pressed into different depths conveniently.
The preferred length of the connector tube 24 of the present invention is 0.8-1.2m for ease of manufacture and installation. It is further preferable that the length of the connection tube 24 is 1.0 m. A plurality of connecting pipes 24 can be installed according to the testing depth, and the adjacent connecting pipes 24 can be connected through threads, so that the installation or the disassembly is convenient.
In order to improve the stability of the connection pipe 24, the connection pipe 24 is preferably a connection steel pipe.
The connection pipe 24 is preferably screwed to the fixing pipe 22 for easy assembly and disassembly.
The fixing tube 22 is preferably welded and fixed at the through hole 14, so that the stability of the fixing tube 18 and the lantern ring 12 is improved.
In order to improve the stability of the fixed pipe 22, the fixed pipe 22 is preferably a fixed steel pipe.
The invention also discloses a testing method of the lateral pressure of the cement-soil slurry, and the testing device comprises the following steps:
(1) fixing the soil pressure cell 10 in the lantern ring 12, and leading a test lead 16 of the soil pressure cell 10 to pass through the through hole 14 and penetrate into the protective pipe;
(2) the collar 12 is inserted into the cement slurry 32 through the insert, and the lateral pressure at different depths is tested;
(3) after the test is completed, the collar 12 is pulled out and the soil pressure cell 10 is taken out.
As shown in fig. 3, the following describes the testing method of the present invention, including the following steps:
(1) placing the soil pressure cell 10 into the lantern ring 12, screwing two bolts 18 to fix the soil pressure cell 10, and sequentially passing the test lead 16 of the soil pressure cell 10 through the through hole 14 and the fixing tube 22;
(2) the test lead 16 is inserted into the first connecting pipe 24, and the connecting pipe 24 and the fixed pipe 22 are screwed tightly;
(3) the collar 12 is inserted into the cement slurry 26 through the blade 20, testing the lateral pressure at different depths;
(4) after the test is completed, the connecting tube 24 is removed from the fixed tube 22, the collar 12 is pulled out, and the two bolts 18 are loosened to take out the soil pressure cell 10.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a testing arrangement of cement soil mud lateral pressure, its characterized in that, includes soil pressure cell, the lantern ring, soil pressure cell fixes in the lantern ring, the bottom of the lantern ring is fixed with the plug-in components, the through-hole has been seted up at the top of the lantern ring, through-hole department is provided with the protection tube, soil pressure cell's test wire passes in proper order the through-hole just penetrates in the protection tube.
2. The device for testing the lateral pressure of the cement-soil mud as claimed in claim 1, wherein at least two mounting holes are arranged on the lantern ring, each mounting hole is connected with a bolt, and the bolt abuts against the soil pressure box.
3. The device for testing the lateral pressure of cement-soil mud as claimed in claim 1, wherein said insert is a knife edge.
4. The device for testing the lateral pressure of cement-soil mud as claimed in claim 3, wherein said knife edge is welded to the bottom of said collar.
5. The device for testing the lateral pressure of cement-soil mud as claimed in claim 1, wherein said protection tube comprises a fixed tube and an extension tube detachably connected with said fixed tube, said fixed tube is disposed at said through hole, said extension tube comprises at least one connection tube.
6. The device for testing the lateral pressure of cement-soil mud as claimed in claim 5, wherein the length of the connecting pipe is 0.8-1.2 m.
7. The device for testing the lateral pressure of cement-soil mud of claim 5, 6 or 6, wherein the connecting pipe is a connecting steel pipe.
8. The device for testing the lateral pressure of cement-soil mud as claimed in claim 5, wherein said fixed pipe is welded and fixed at said through hole.
9. The device for testing the lateral pressure of the cement-soil mud as claimed in claim 5 or 8, wherein the fixed pipe is a fixed steel pipe.
10. A method for testing the lateral pressure of a cement slurry, using a testing device according to any one of claims 1 to 9, comprising the steps of:
(1) fixing the soil pressure box in the sleeve ring, and enabling a test lead of the soil pressure box to penetrate through the through hole and penetrate into the protection tube;
(2) inserting the lantern ring into the cement-soil slurry through the plug-in unit, and testing the lateral pressure at different depths;
(3) and after the test is finished, pulling out the lantern ring, and taking out the soil pressure box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321215.5A CN112302065A (en) | 2020-11-23 | 2020-11-23 | Device and method for testing lateral pressure of cement-soil slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321215.5A CN112302065A (en) | 2020-11-23 | 2020-11-23 | Device and method for testing lateral pressure of cement-soil slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302065A true CN112302065A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011321215.5A Pending CN112302065A (en) | 2020-11-23 | 2020-11-23 | Device and method for testing lateral pressure of cement-soil slurry |
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| Country | Link |
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| CN (1) | CN112302065A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324062A (en) * | 2008-07-24 | 2008-12-17 | 上海交通大学 | Testing method and apparatus of breast wall slurry pressure in underground continuous wall trench construction |
| CN101358455A (en) * | 2008-08-14 | 2009-02-04 | 上海交通大学 | Lateral earth pressure sensor embedment method and device in earth |
| JP2016050388A (en) * | 2014-08-29 | 2016-04-11 | 株式会社奥村組 | In-situ soaking test apparatus for unsaturated soil |
| CN109024527A (en) * | 2018-06-15 | 2018-12-18 | 中铁西安勘察设计研究院有限责任公司 | It is embedding with later maintenance method that roadbed dynamic response tests internal sensor |
| CN214061716U (en) * | 2020-11-23 | 2021-08-27 | 苏州大学 | Testing arrangement of cement soil mud lateral pressure |
-
2020
- 2020-11-23 CN CN202011321215.5A patent/CN112302065A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324062A (en) * | 2008-07-24 | 2008-12-17 | 上海交通大学 | Testing method and apparatus of breast wall slurry pressure in underground continuous wall trench construction |
| CN101358455A (en) * | 2008-08-14 | 2009-02-04 | 上海交通大学 | Lateral earth pressure sensor embedment method and device in earth |
| JP2016050388A (en) * | 2014-08-29 | 2016-04-11 | 株式会社奥村組 | In-situ soaking test apparatus for unsaturated soil |
| CN109024527A (en) * | 2018-06-15 | 2018-12-18 | 中铁西安勘察设计研究院有限责任公司 | It is embedding with later maintenance method that roadbed dynamic response tests internal sensor |
| CN214061716U (en) * | 2020-11-23 | 2021-08-27 | 苏州大学 | Testing arrangement of cement soil mud lateral pressure |
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