CN212175884U - Bored concrete pile end sediment detection device of loosing core - Google Patents
Bored concrete pile end sediment detection device of loosing core Download PDFInfo
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- CN212175884U CN212175884U CN202020423908.4U CN202020423908U CN212175884U CN 212175884 U CN212175884 U CN 212175884U CN 202020423908 U CN202020423908 U CN 202020423908U CN 212175884 U CN212175884 U CN 212175884U
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Abstract
The utility model discloses a bored concrete pile end sediment detection device of loosing core, including bored concrete pile steel reinforcement cage, first slip casting pipe, second slip casting pipe and third slip casting pipe are fixed in on the inner wall of bored concrete pile steel reinforcement cage through the stirrup ligature, first slip casting pipe, the tip of second slip casting pipe and third slip casting pipe is connected with the wooden plug check valve through the screw thread respectively, metal check valve and rubber check valve, the wooden plug check valve comprises steel pipe and the wooden plug that inserts the steel pipe, metal check valve is equipped with the steel pipe that connecting thread and the other end are the duckbilled for one end, rubber check valve includes that the tip is equipped with connecting thread's steel pipe and rubber wrapping layer, the rubber wrapping layer cladding just forms the shutoff to the grout hole on the steel pipe, the both ends winding on rubber wrapping layer has rust-resistant steel wire. The device integrates the two procedures of pile bottom sediment detection and pile bottom soil body reinforcement, reduces a series of steps of drilling, coring and the like of the traditional pile bottom sediment detection, and reduces the construction period and the engineering cost.
Description
Technical Field
The utility model relates to a building pile foundation detects technical field, concretely relates to bored concrete pile end sediment detection device of loosing core.
Background
The cast-in-situ bored pile has the advantages of wide application range, high single-pile bearing capacity, low construction noise, small vibration, low unit price and the like, and is widely applied to various building projects. With the increasing of high-rise buildings, the requirement on the bearing capacity of the pile foundation is higher and higher. However, due to the particularity of the construction process of the cast-in-situ bored pile, the bearing capacity of the cast-in-situ bored pile is greatly influenced by factors in construction, and particularly, the bearing capacity of the pile foundation is seriously influenced by a hole bottom slag layer. Therefore, the detection and control of the thickness of the reinforced hole bottom sediment in the construction process are one of the key measures for ensuring the construction quality of the cast-in-situ bored pile and the bearing capacity of the pile foundation. Meanwhile, when the side friction of the cast-in-place pile cannot reach the designed bearing capacity, in order to improve the bearing capacity of the pile, the compressive strength of the soil body at the bottom of the pile can be improved by adopting a pile bottom grouting mode, so that the support force is provided for the cast-in-place pile, and further, the sufficient bearing capacity is provided for the upper structure. However, the existing pile bottom sediment detection and pile bottom soil body grouting reinforcement of the drilling and pouring hole are two different procedures, and the respective construction will undoubtedly increase the construction period and the construction cost; meanwhile, during sampling, the drill core is easy to deviate from the drilling direction to cause the damage of the pile body.
SUMMERY OF THE UTILITY MODEL
The above-mentioned problem to prior art exists, the utility model provides a sediment detection device is loosed core to bored concrete pile end, this device detect at the bottom of the pile sediment and pile bottom soil body reinforcement twice process fuse together, have reduced a series of steps such as core are got in drilling that traditional sediment detected at the bottom of the pile, have reduced construction period and engineering cost.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a pile end core-pulling sediment detection device of a cast-in-place pile is characterized by comprising a cast-in-place pile steel reinforcement cage, a first grouting pipe, a second grouting pipe and a third grouting pipe, wherein the first grouting pipe, the second grouting pipe and the third grouting pipe are fixedly arranged on the inner wall of the cast-in-place pile steel reinforcement cage through binding of stirrups, the end parts of the first grouting pipe, the second grouting pipe and the third grouting pipe extend out of the end part of the cast-in-place pile steel reinforcement cage by 50cm, the central angles among the first grouting pipe, the second grouting pipe and the third grouting pipe are 120 degrees, the end parts of the first grouting pipe, the second grouting pipe and the third grouting pipe are respectively connected with a wood plug check valve, a metal check valve and a rubber check valve through screw threads, the connection part of the screw threads is wound with a raw material belt, the wood plug check valve consists of a steel pipe with connection threads at the end part and a wood plug inserted into the steel pipe, the metal check valve is a steel pipe with connection screw threads at one end part and the other end part is in a shape, the rubber check valve comprises a steel pipe and a rubber wrapping layer, wherein the end portion of the steel pipe is provided with a connecting thread, the end portion of the steel pipe is welded with a conical head, a slurry permeating hole is formed in the steel pipe, the rubber wrapping layer is wrapped on the steel pipe and forms plugging for the slurry permeating hole, and two ends of the rubber wrapping layer are wrapped by rustproof steel wires.
The utility model has the advantages that: the device integrates two procedures of pile bottom sediment detection and pile bottom soil body reinforcement, reduces a series of steps of drilling and coring and the like of the traditional pile bottom sediment detection, and reduces the construction period and the construction cost; meanwhile, the cast-in-place pile can be prevented from being damaged due to core drilling and deflection in the traditional core pulling and sediment depositing process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a cast-in-place pile end core-pulling sediment detection device.
In the drawings, the components represented by the respective reference numerals are listed below:
1-bored concrete pile reinforcement cage, 2-first grouting pipe, 3-wooden plug check valve, 4-raw material belt, 5-second grouting pipe, 6-metal check valve, 7-third grouting pipe, 8-rubber check valve, 9-cone head and 10-antirust steel wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a bored concrete pile end core-pulling sediment detection device comprises a bored concrete pile reinforcement cage 1, a first grouting pipe 2, a second grouting pipe 5 and a third grouting pipe 7, wherein the first grouting pipe 2, the second grouting pipe 5 and the third grouting pipe 7 are fixed on the inner wall of the bored concrete pile reinforcement cage 1 through binding of stirrups, the end parts of the first grouting pipe 2, the second grouting pipe 5 and the third grouting pipe 7 extend out of the end part of the bored concrete pile reinforcement cage by 50cm, the central angles among the first grouting pipe 2, the second grouting pipe 5 and the third grouting pipe 7 are all 120 degrees, the end parts of the first grouting pipe 2, the second grouting pipe 5 and the third grouting pipe 7 are respectively connected with a wood plug check valve 3, a metal check valve 6 and a rubber check valve 8 through screw threads, the connection part of the screw threads is wrapped with a raw check valve 4, the wood plug 3 consists of a steel pipe with connection threads at the end part and a wood plug inserted into the steel pipe, the metal check valve 6 is equipped with connecting thread and the other end is the steel pipe of duckbilled form for one end, and rubber check valve 8 includes that the tip is equipped with connecting thread's steel pipe and rubber wrapping layer, and the tip welding of steel pipe has conical head 9, and it has the hole of starching thoroughly to open on the steel pipe, and rubber wrapping layer cladding just forms the shutoff to starching the hole thoroughly on the steel pipe, and the both ends winding on rubber wrapping layer has rust-resistant steel wire 10.
One specific application of the device is as follows: (1) manufacturing a cast-in-place pile reinforcement cage: sectional manufacturing of pouring column reinforcement cage 1 in manufacturing field
(a) Adopting a mould forming method: the combined mould is formed by welding channel steel and steel plates, and each group of mould consists of an upper cross beam, a vertical beam and a bottom beam. The upper cross beam and the vertical beam are respectively connected with the bottom beam through the inserted shaft and the angle steel, and are combined with the steel plate welded on the bottom beam to form a tire mold with the same diameter, the same number of main ribs and a groove. The distance between every two moulding beds is the distance of the designed stiffening stirrup, namely, the moulding bed is set according to the number of the stiffening stirrups of each section of the poured pile reinforcement cage. The stiffening stirrup is positioned at the same side of each mould, the main reinforcement and the stirrup are welded according to the groove of the mould, after all the stiffening stirrups are welded, the upper beam and the vertical beam are detached, the cast-in-place pile reinforcement cage is rolled out, then the cage body is lifted and placed on the support, the coil reinforcement is sleeved, the spiral reinforcement is arranged according to the designed position and is bound on the main reinforcement, the spot welding is firm, then the first grouting pipe 2, the second grouting pipe 5 and the third grouting pipe 7 are fixed on the inner wall of the cast-in-place pile reinforcement cage 1 through the binding of the stirrups respectively, the respective end parts of the first grouting pipe, the second grouting pipe and the third grouting pipe extend out of the outer side of the cage body by 50cm, finally, the wood plug check valve 3, the metal check valve 6 and the rubber check valve 8 are connected through the screw threads, and the raw.
(b) Arrangement of protective layer of reinforcement cage of cast-in-place pile
The filling pile reinforcement cage is provided with round cake type concrete cushion blocks according to design requirements, the cushion blocks are arranged one by one according to the design requirements, 4 cushion blocks are uniformly distributed along the circumference scheme of each channel, and the channels are arranged in a staggered manner.
(2) Storage, transportation and on-site hoisting of cast-in-place pile reinforcement cage
(a) The site where the bored concrete pile reinforcement cage 1 is temporarily stored must be kept flat and dry. When the floor is stored, the contact position of each stiffening rib and the ground is padded with wood battens with the same height so as to prevent the stiffening ribs from being affected with damp or being stained with mud. The sections of each group of frameworks are arranged in sequence, and the signboards are hung, so that the frameworks are conveniently loaded and transported out in sequence when in use.
The pile cage 1 must be such that the pile cage 1 does not deform during transport to the pier site. When the automobile transportation is adopted, the supporting points are ensured to be arranged at each stiffening rib, and the heights of the supporting points are equal; when manual lifting and transporting are adopted, a plurality of lifting rods are required to be arranged, the lifting rods are ensured to penetrate into the stiffening ribs as close to the center of the cage body as possible, and the stress of each lifting rod is uniform as much as possible.
(b) When the cast-in-place pile reinforcement cage 1 is installed, two-point hoisting is adopted, the first hoisting point is arranged at the lower part of the framework, and the second hoisting point is arranged between the middle point and the upper third-minute point of the length of the framework. When the diameter of the steel reinforcement cage is larger than 1200mm and the length is larger than 6m, measures are taken to reinforce the lifting point so as to ensure that the steel reinforcement cage is not deformed during lifting. When the steel bar cage is hung in the hole, the hole diameter is aligned, the steel bar cage is kept vertical, the steel bar cage is lightly placed in the hole slowly, the steel bar cage is slowly placed in the hole after the hole is inserted, the steel bar cage is not suitable for left-right rotation, and the steel bar cage is strictly prevented from swinging to collide the hole wall. If the transfer is stopped in case of obstruction, the transfer is processed by finding out the reason. The increase of the jerk and the forced lowering are strictly prohibited. When the first section of framework is placed at the position of the last section of stiffening rib, I-shaped steel penetrates into the first section of framework, the cast-in-place pile reinforcement cage is temporarily supported on the I-shaped steel at the orifice, and then the second section of cage body is lifted to be connected with the first section of cage body by adopting lap welding. The upper and lower main rib positions are aligned during connection, and the upper and lower axes of the cage body are kept consistent: firstly, two connectors in one direction are connected, then the two connectors are slightly lifted so that the upper and lower sections of reinforcement cages are vertical under the action of self weight, then all other connectors are connected, and the positions of the connectors are staggered by at least 20 days according to 50% of the number of the connectors. After the joints are welded, the cage body is lifted, and after the supporting I-steel is pulled out, the framework is put down. The circulation is carried out in such a way that the cage body is lowered to the designed elevation.
The length of the positioning rib must be calculated by the measured orifice elevation, and in order to prevent the bored concrete pile reinforcement cage 1 from falling or floating during the pouring process, the positioning of the bored concrete pile reinforcement cage is suspended on the steel casing by using a threaded steel bar. And aligning the center of the reinforcement cage of the cast-in-place pile with the designed center of the pile, repeatedly checking the center of the reinforcement cage of the cast-in-place pile, welding and positioning the reinforcement cage of the cast-in-place pile on the steel casing, and completing the installation of the reinforcement cage 1 of the cast-in-place pile. And after the cast-in-place pile reinforcement cage 1 is positioned, concrete is poured within 4 hours to prevent hole collapse.
(3) Pouring of concrete
(a) Installing a guide pipe: and after the hoisting of the reinforcement cage is finished, installing the concrete pouring guide pipe in time according to the arrangement of the concrete approach time. The guide pipe is a steel pipe with the diameter of 300mm, the length of the guide pipe is 4m at the bottom section, short pipes with the length of 1-1.5 m at 1-2 sections are matched with standard pipes with the length of 2.5m for the rest, the guide pipe is placed into the guide pipe by a crane, the guide pipe is placed at the bottom of the hole after being completely placed into the hole so as to check the length and the depth of the guide pipe, and then the guide pipe is lifted by 30-50 cm. And then, the performance of the slurry is detected, and secondary hole cleaning operation is required when the requirement is not met. During the installation of the guide pipe, the position of a lifting hook of the crane is adjusted, so that the guide pipe is placed in the middle of the hole as much as possible, the guide pipe is slowly placed, and the collision of the steel reinforcement cage is avoided.
(b) Pouring concrete of a pile body: the underwater concrete is poured by a guide pipe method. The cast-in-place bored pile concrete is commercial concrete, underwater concrete with the strength grade of C35 is adopted, the concrete slump is 20 +/-2 cm, a concrete conveying tank is transported to a construction site and is accompanied with data such as concrete opening identification and concrete construction bills, and meanwhile, the inventor regularly performs material sampling inspection such as cement, aggregate and admixture on a commercial concrete mixing center.
Checking the water tightness of the conduit and ensuring that the conduit is installed in place.
Secondly, the concrete entering check-in machine account is established, the quality of the concrete is ensured to meet the requirements, and the traceability is realized. Before and during concrete pouring, the slump and other appearance quality of the concrete should be detected at any time and recorded. After the indexes to be detected are in accordance with the indexes, concrete can be poured.
Third, calculating the first sealing bottom concrete
The depth of the conduit opening to the bottom of the hole is 0.3-0.5 m, the burial depth of the first concrete conduit is more than 1.0m, and the quantity V of the first concrete is calculated according to the following formula:
V＝H1×πd2/4+Hc×πd2(ii)/4; wherein D is the diameter of the drilled pile, D is the diameter of the guide pipe, HcThe height of the concrete surface to the bottom of the hole H is required for the first batch1The height from the concrete surface to the water surface.
The method comprises the steps of accurately calculating the first concrete pouring volume before concrete pouring, manufacturing a funnel with a proper volume (the size is calculated according to the first back cover concrete volume), ensuring that the back cover is smooth, and normally pouring after confirming that the back cover is successful. The pouring process is strictly carried out according to the standard, and various detections such as concrete quality, conduit embedding depth and the like are carried out at any time so as to ensure the smoothness of the whole pouring process.
Fourthly, underwater concrete pouring
The underwater concrete should be poured continuously, the underwater concrete should not be stopped midway, the interruption time for removing the guide pipe should be shortened as much as possible, and the pouring of each pile is ensured to be completed within the initial setting time set by the mix proportion.
In the concrete pouring process, measurement and pipe disassembly are carried out frequently in the pouring process. The measurement adopts a measuring rope which is soaked in water and is corrected by a qualified steel ruler to measure the position of the top surface of the concrete in the hole, and the buried depth of the conduit is kept within the range of 2-6 m.
When the concrete pouring surface is close to the designed elevation, the guide pipe is lifted slowly, the position of the top surface of the concrete is measured accurately by a heavy hammer and a measuring rope, and the top surface of the concrete is guaranteed to be poured to be 0.5-1.0 m above the designed elevation of the pile top. During the process of pouring underwater concrete, concrete pouring records are filled in exactly, and meanwhile, the reinforcement cage is prevented from floating upwards.
Performing spot inspection at any time in the concrete pouring process, reserving concrete test blocks, reserving a group of standard maintenance test blocks for each pile, maintaining the test blocks well, and immediately removing a mold and conveying the test blocks to a maintenance room for standard maintenance after certain strength is achieved; and after the concrete construction is finished, collecting data such as a concrete certificate and a concrete strength report in time.
(c) Pile bottom sediment detection
The wooden plug check valve 3 and the metal check valve 6 are inserted into a pile body soil body, the first grouting pipe 2 and the second grouting pipe 5 are reversely screwed, so that the wooden plug check valve 3 and the metal check valve 6 are respectively screwed off from the first grouting pipe 2 and the second grouting pipe 5, the sampling pipe is immediately inserted into the pile bottom through the first grouting pipe 2 and the second grouting pipe 5 until the pile bottom is reached, a pile bottom sediment sample is cut, a sampling pipe core is taken out from the first grouting pipe 2 and the second grouting pipe 5, sediment detection can be carried out, and the steps of drilling holes in a concrete pile body by a traditional drilling machine are reduced.
(d) Pile bottom soil body reinforcement
The concrete pumping and pressurizing device is connected with the third grouting pipe 7, cement paste is pumped into the third grouting pipe 7 through the concrete pumping and pressurizing device, the rubber wrapping layer 8 expands under the pressure action of the cement paste, the cement paste flows out of the grout permeating holes of the steel pipe, the cement paste enters the soil body at the bottom of the pile through splitting and permeating actions, and the soil body at the bottom of the pile forms a more stable pressure-bearing body under the cementing action of the cement paste so as to improve the pressure-bearing strength of the bored pile.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (1)
1. A bored concrete pile end core-pulling sediment detection device is characterized by comprising a bored concrete pile steel reinforcement cage (1), a first grouting pipe (2), a second grouting pipe (5) and a third grouting pipe (7), wherein the first grouting pipe (2), the second grouting pipe (5) and the third grouting pipe (7) are fixed on the inner wall of the bored concrete pile steel reinforcement cage (1) through binding of stirrups, the end parts of the first grouting pipe (2), the second grouting pipe (5) and the third grouting pipe (7) extend out of the end part of the bored concrete pile steel reinforcement cage by 50cm, central angles among the first grouting pipe (2), the second grouting pipe (5) and the third grouting pipe (7) are 120 degrees, the end parts of the first grouting pipe (2), the second grouting pipe (5) and the third grouting pipe (7) are respectively connected with a wood plug (3), a metal check valve (6) and a rubber check valve (8) through screw threads, and a raw material belt (4) is wound at a screw thread connection part, wooden plug check valve (3) constitute by the end is equipped with connecting thread's steel pipe and the wooden plug that inserts the steel pipe, metal check valve (6) are equipped with the steel pipe that connecting thread and the other end are the duckbilled form for one end, rubber check valve (8) are equipped with connecting thread's steel pipe and rubber parcel layer including the tip, the tip welding of steel pipe has conical head (9), it has the hole of breathing freely to open on the steel pipe, rubber parcel layer cladding just forms the shutoff to the hole of breathing freely on the steel pipe, the both ends winding on rubber parcel layer has rust-resistant steel wire (10).
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| CN202020423908.4U CN212175884U (en) | 2020-03-27 | 2020-03-27 | Bored concrete pile end sediment detection device of loosing core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321766A (en) * | 2020-03-27 | 2020-06-23 | 云南建投第一勘察设计有限公司 | Bored concrete pile end sediment detection device of loosing core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321766A (en) * | 2020-03-27 | 2020-06-23 | 云南建投第一勘察设计有限公司 | Bored concrete pile end sediment detection device of loosing core |
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