CN209816830U - A slip casting structure for interlock formula campshed construction cold joint - Google Patents
A slip casting structure for interlock formula campshed construction cold joint Download PDFInfo
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- CN209816830U CN209816830U CN201920541688.2U CN201920541688U CN209816830U CN 209816830 U CN209816830 U CN 209816830U CN 201920541688 U CN201920541688 U CN 201920541688U CN 209816830 U CN209816830 U CN 209816830U
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Abstract
The utility model belongs to the technical field of engineering construction, in particular to a cold joint grouting structure for occlusion type row pile construction, which comprises an occlusion type row pile, a first grouting pipe, a second grouting pipe, a grouting pump and a grout stop valve; cement paste and water glass paste are respectively injected into the first grouting pipe and the second grouting pipe and are fixed on one side of the soil facing surface of the reinforced concrete pile reinforcement cage; the grouting pump can simultaneously convey a double-liquid grouting pump of cement slurry and water glass slurry; stop the thick liquid valve and be located slip casting pipe end portion, prevent to run thick liquid, two kinds of media are solidified fast after meeting in the permeable bed, play stagnant water shutoff function. The utility model discloses be particularly useful for the cold seam preliminary treatment of interlock formula campshed in the fine sand of powder, the sandy cobble layer under the high pressure-bearing water level. The grouting plugging method for the cold joint in the occlusion type pile arranging construction has the advantages of being good in grouting plugging effect, simple in construction process, convenient to operate, capable of saving construction period and cost and the like.
Description
Technical Field
The utility model belongs to the technical field of the engineering construction, concretely relates to interlock formula campshed construction cold joint slip casting structure.
Background
The meshed pile row is widely applied to foundation pit engineering, and is particularly suitable for soil layers with complex hydrogeological conditions such as silt, quicksand and underground water enrichment; compared with the common drilling support piles, the meshed row piles have the advantages that the formed curtain has the water interception performance, and auxiliary soil retaining and water interception measures among the common drilling support piles are not needed; compared with the ground connecting wall, the engaged row pile structure has the advantages of lower reinforcement ratio and more flexible construction. However, in actual construction, the occlusion quality of the closed occlusion type row piles at the end of the construction section is poor, the lower ends of the occlusion type row piles at the end are often split, the split phenomenon becomes a main leakage point during excavation of the foundation pit, and the surrounding environment of the foundation pit and the safe use of the foundation pit are endangered by the leakage and the quicksand of the foundation pit.
Due to the defects, the field needs to be further perfected and improved, and a grouting structure suitable for cold joints in occlusion type row pile construction is designed to meet the requirements of water stopping and plugging.
Disclosure of Invention
The utility model discloses to each construction section end of interlock formula campshed cold joint position take place easily "split", the relatively poor problem of interlock quality, provide an interlock formula campshed construction cold joint slip casting structure, its purpose is through the two liquid slip casting of cold joint department and is handled, strengthens the interlock quality of cold joint department to the stagnant water effect of better assurance foundation ditch interlock curtain.
The utility model comprises an occlusion type row pile, a first grouting pipe, a second grouting pipe, a grouting pump and a grout stop valve; the first grouting pipe is used for injecting cement paste and fixed on one side of the soil facing surface of a reinforcement cage of the reinforced concrete pile; the second grouting pipe is filled with glass cement and fixed on one side of the soil facing surface of the reinforced concrete pile reinforcement cage; the grouting pump is a double-liquid grouting pump capable of simultaneously conveying cement slurry and water glass slurry; stop thick liquid valve and be located slip casting pipe end portion, prevent to run thick liquid.
The allowable deviation of the verticality of the engagement type row pile is 1/300.
The first grouting pipe and the second grouting pipe are provided with holes on one side of the permeable layer, the hole opening direction of the grouting pipes is to face one side of the soil body, and the hole opening section enters the impermeable layer section and is not smaller than 500 mm.
The first grouting pipe and the second grouting pipe are provided with a pipe head of 20cm higher than the ground, and the end heads of the grouting pipes are protected from being blocked by sundries.
The utility model discloses a following technical scheme realizes: the utility model provides a interlock formula campshed construction cold joint slip casting structure, the construction section end adopts the sand pile to handle in advance, and during reinforced concrete pile closure construction, at the inside two slip casting pipes that set up of reinforced concrete pile, slip casting pipe and slip casting pump constitute two liquid slip casting systems. The two grouting pipes are respectively filled with cement paste and water glass, and the two liquids are quickly solidified after meeting in a sandy soil aquifer to achieve the plugging effect.
The cold joint grouting structure for the occlusion type row pile construction is characterized in that two grouting pipes on a reinforced concrete pile are respectively provided with a hole in one side, the hole opening direction of each grouting pipe is to face one side of a soil body, the distance between every two holes is preferably set to be 100-300 mm, and the number of the grouting pipes can be increased as necessary according to stratum and water containing conditions.
The cold seam grouting structure for the occlusion type row pile construction is characterized in that the opening depth of a grouting pipe is a water-containing layer section, and the depth of the grouting pipe entering a weak water-containing layer from top to bottom is not less than 500 mm.
The I-sequence pile is made of plain concrete pile materials and plastic concrete, and the strength grade of the concrete is 2 ~ 5 MPa.
Interlock formula campshed construction cold joint slip casting structure, construction section end adopts the sand pile to handle, adopts the sand filling after precutting plain concrete pile body, excavates the construction reinforced concrete pile with the sand when waiting to close.
A construction method for a cold joint grouting structure for occlusion type pile row construction is characterized by comprising the following steps:
firstly, after the site is leveled and the construction of a guide wall is finished, constructing I-sequence piles and II-sequence piles from the end head of a certain construction section; construction for cutting and forming holes of II-sequence piles at end heads of construction sections in adjacent-sequence pile coagulation main initial setting
After the hole is formed, sand is used for filling the hole into a sand pile;
secondly, constructing second-order piles in the reserved sand piles, digging out the sand piles by a drilling machine, drilling at a low speed to form holes, and strictly controlling the verticality of a drill rod; two grouting pipes are arranged on the reinforcement cage of the second-order pile and are arranged on two sides of the soil facing surface at the occlusion part of the first-order pile;
thirdly, the concrete strength of the second-order pile reaches 10 ~ 15MPa, and a grouting hole of the grouting pipe is plugged by clear water;
step four, preparing cement paste and water glass paste;
and step five, when the concrete strength of the pile in the sequence II reaches 75% of the designed strength, performing double-liquid grouting to finish plugging.
The allowable deviation of the verticality of the piles for constructing the I-order piles and the II-order piles is 1/300.
The I-sequence pile is made of plain concrete pile materials and plastic concrete, and the strength grade of the concrete is 2 ~ 5 MPa.
The utility model has the advantages that: the utility model discloses utilize biliquid slip casting to handle interlock formula campshed construction cold joint, the slip casting shutoff is effectual, and construction simple process, the construction of being convenient for can effectively practice thrift the expense of high pressure jet grouting pile back leaking stoppage, is particularly useful for the interlock formula campshed cold joint preliminary treatment in the fine sand of powder under the high pressure-bearing water level, the sand cobble layer.
Drawings
In order to illustrate the implementation of the invention more clearly, the drawings that are needed for describing the embodiments or the existing products will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a plan view of an engaged type row pile and a grouting pipe of a cold joint grouting structure for engaged type row pile construction;
FIG. 2 is a cross-sectional layout view of an engagement type row pile and a grouting pipe of an engagement type row pile construction cold seam grouting structure;
fig. 3 is a detailed opening drawing of a grouting pipe of a cold joint grouting structure for engaged row pile construction.
Reference numerals: 1-I order pile, 2-II order pile, 3-first grouting pipe, 4-second grouting pipe, 5-sand pile, 6-grouting hole and 7-permeable layer.
Detailed Description
As shown in fig. 1, the cold seam grouting structure for the engagement type row pile construction comprises an engagement type row pile, a first grouting pipe, a second grouting pipe, a grouting pump and a grout stop valve; the first grouting pipe is used for injecting cement paste and fixed on one side of the soil facing surface of a reinforcement cage of the reinforced concrete pile; the second grouting pipe is filled with glass cement and fixed on one side of the soil facing surface of the reinforced concrete pile reinforcement cage; the grouting pump is a double-liquid grouting pump capable of simultaneously conveying cement slurry and water glass slurry; stop thick liquid valve and be located slip casting pipe end portion, prevent to run thick liquid.
As an alternative embodiment, as shown in fig. 3, the first grouting pipe and the second grouting pipe are both provided with holes on one side of the permeable layer, the hole opening direction of the grouting pipes faces the soil body side, and the hole opening section enters the impermeable layer section by not less than 500 mm.
The first grouting pipe and the second grouting pipe are provided with a pipe head of 20cm higher than the ground, and the end heads of the grouting pipes are protected from being blocked by sundries.
The utility model discloses a following technical scheme realizes: the utility model provides a interlock formula campshed construction cold joint slip casting structure, the construction section end adopts the sand pile to handle in advance, and during reinforced concrete pile closure construction, at the inside two slip casting pipes that set up of reinforced concrete pile, slip casting pipe and slip casting pump constitute two liquid slip casting systems. The two grouting pipes are respectively filled with cement paste and water glass, and the two liquids are quickly solidified after meeting in a sandy soil aquifer to achieve the plugging effect.
As shown in fig. 2, as an optional embodiment, in the cold joint grouting structure for engaged row pile construction, two grouting pipes on a reinforced concrete pile are both provided with holes on one side, the hole opening direction of the grouting pipes is to face one side of a soil body, the distance between the holes is preferably set to be 100-300 mm, and the number of the grouting pipes can be increased as necessary according to the stratum and the water-containing condition.
The cold seam grouting structure for the occlusion type row pile construction is characterized in that the opening depth of a grouting pipe is a water-containing layer section, and the depth of the grouting pipe entering a weak water-containing layer from top to bottom is not less than 500 mm.
The allowable deviation of the verticality of the engagement type row pile is 1/300.
The I-sequence pile is made of plain concrete pile materials and plastic concrete, and the strength grade of the concrete is 2 ~ 5 MPa.
As shown in fig. 1, as an alternative embodiment, the cold joint grouting structure for occlusion type pile arranging construction is characterized in that the end of the construction section is processed by sand pile, the pile body of a plain concrete pile is pre-cut and then is grouted by sand, and when the pile body is closed, the sand is dug out of the construction reinforced concrete pile.
A construction method for a cold joint grouting structure for occlusion type pile row construction is characterized by comprising the following steps:
firstly, after the site is leveled and the construction of a guide wall is finished, constructing I-sequence piles and II-sequence piles from the end head of a certain construction section; construction for cutting and forming holes of II-sequence piles at end heads of construction sections in adjacent-sequence pile coagulation main initial setting
After the hole is formed, sand is used for filling the hole into a sand pile;
secondly, constructing second-order piles in the reserved sand piles, digging out the sand piles by a drilling machine, drilling at a low speed to form holes, and strictly controlling the verticality of a drill rod; two grouting pipes are arranged on the reinforcement cage of the second-order pile and are arranged on two sides of the soil facing surface at the occlusion part of the first-order pile;
thirdly, the concrete strength of the second-order pile reaches 10 ~ 15MPa, and a grouting hole of the grouting pipe is plugged by clear water;
step four, preparing cement paste and water glass paste;
and step five, when the concrete strength of the pile in the sequence II reaches 75% of the designed strength, performing double-liquid grouting to finish plugging.
The I-sequence pile is made of plain concrete pile materials and plastic concrete, and the strength grade of the concrete is 2 ~ 5 MPa.
Claims (5)
1. A cold joint grouting structure for occlusion type row pile construction comprises occlusion type row piles, a first grouting pipe, a second grouting pipe, a grouting pump and a grout stop valve; the first grouting pipe is used for injecting cement paste and fixed on one side of the soil facing surface of a reinforcement cage of the reinforced concrete pile; the second grouting pipe is filled with glass cement and fixed on one side of the soil facing surface of the reinforced concrete pile reinforcement cage; the grouting pump is a double-liquid grouting pump capable of simultaneously conveying cement slurry and water glass slurry; stop thick liquid valve and be located slip casting pipe end portion, prevent to run thick liquid.
2. The cold joint grouting structure for the engagement type row pile construction according to claim 1, wherein: the allowable deviation of the verticality of the engagement type row pile is 1/300.
3. The cold joint grouting structure for the engagement type row pile construction according to claim 1, wherein: the end of the meshed pile arranging construction is a pile of the I sequence, the pile of the I sequence is subjected to soft cutting to form a hole, coarse sand is poured, and the pile of the II sequence connected is in the hole position of the pile of the original sand.
4. The cold joint grouting structure for the engagement type row pile construction according to claim 1, wherein: the first grouting pipe and the second grouting pipe are provided with holes on one side of the permeable layer, the hole opening direction of the grouting pipes is to face one side of the soil body, and the hole opening section enters the impermeable layer section and is not smaller than 500 mm.
5. The cold joint grouting structure for the engagement type row pile construction according to claim 1, wherein: the first grouting pipe and the second grouting pipe are provided with a pipe head of 20cm higher than the ground, and the end heads of the grouting pipes are protected from being blocked by sundries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920541688.2U CN209816830U (en) | 2019-04-20 | 2019-04-20 | A slip casting structure for interlock formula campshed construction cold joint |
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| CN201920541688.2U CN209816830U (en) | 2019-04-20 | 2019-04-20 | A slip casting structure for interlock formula campshed construction cold joint |
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| CN209816830U true CN209816830U (en) | 2019-12-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914390A (en) * | 2019-04-20 | 2019-06-21 | 北京中岩大地科技股份有限公司 | It is a kind of to construct the slip casting structure and construction method of cold seam for biting connecions campshed |
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2019
- 2019-04-20 CN CN201920541688.2U patent/CN209816830U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914390A (en) * | 2019-04-20 | 2019-06-21 | 北京中岩大地科技股份有限公司 | It is a kind of to construct the slip casting structure and construction method of cold seam for biting connecions campshed |
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