CN215252835U

CN215252835U - Follow-up casing suitable for sandy cobble stratum

Info

Publication number: CN215252835U
Application number: CN202121262382.7U
Authority: CN
Inventors: 冉景军; 马玲玲
Original assignee: Guangxi Guilin Jinqiao Foundation Engineering Co ltd
Current assignee: Guangxi Guilin Jinqiao Foundation Engineering Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-12-21
Anticipated expiration: 2031-06-07

Abstract

The utility model relates to the technical field of rotary excavating machines, in particular to a follow-up casing suitable for a sandy gravel stratum; the follow-up pile casing comprises at least one follow-up pile casing body, wherein a first butt joint and a second butt joint are respectively arranged at two ends of the follow-up pile casing body, the first butt joint and the second butt joint are arranged to enable the two follow-up pile casing bodies to be connected, a clamping block is arranged on the second butt joint, a clamping groove matched with the clamping block is formed in the inner surface of the first butt joint, and a spiral wall is arranged on the outer surface of the follow-up pile casing body; the utility model discloses protecting a section of thick bamboo surface and setting up the spiral wall in the follow-up, let follow-up protect a section of thick bamboo more deepen the sand cobble stratum in deeply, in time extract in the work progress simultaneously and repeat follow-up protect a section of thick bamboo, consequently practiced thrift engineering construction cost.

Description

Follow-up casing suitable for sandy cobble stratum

Technical Field

The utility model relates to a dig quick-witted technical field soon specifically is a follow-up protects a section of thick bamboo suitable for sand cobble stratum.

Background

A protect a section of thick bamboo entirely for construction of sand cobble ground, it is arranged in impacting the stake work progress, because sand cobble layer thickness is thicker, impact stake construction frictional resistance is great, when protecting a section of thick bamboo and sand cobble basis frictional force completely and reach certain size, when hydraulic vibration hammer can not continue to press in protecting a section of thick bamboo entirely, can lead to in the construction to protect a follow-up of a section of thick bamboo entirely often can not target in place along with the construction progress like this, again because the cohesive force ratio of sand cobble is less, protect a section of thick bamboo in all in time in case can't follow-up, the pressure of assaulting the formation often causes the hole of collapsing very easily, thereby lead to the sticking of drill and burying the hammer, bring very big difficulty for the construction progress.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a follow-up protects a section of thick bamboo suitable for sandy cobble stratum to solve the technical problem that above-mentioned background art provided.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a follow-up protects a section of thick bamboo suitable for sandy cobble stratum, includes that at least one section of thick bamboo body is followed up and is protected, follow-up protects a body both ends and is first butt joint and second butt joint respectively, the setting up of first butt joint and second butt joint can make two sections follow up and protect a body to meet, be provided with the fixture block on the second butt joint, be provided with on the first butt joint internal surface with fixture block assorted draw-in groove, be provided with the spiral wall on following up and protecting a body surface.

Specifically, the second is to fixedly being provided with spacing bridge on the joint, the fixture block slides under the spacing bridge, spacing bridge both sides wall is seted up the first locking hole of central axis on the collinear, fixture block one end is provided with the second locking hole, adopt the round pin axle to wear to establish spacing bridge and fixture block when first locking hole corresponds with the second locking hole and fix.

Preferably, a first L-shaped limiting block and a second L-shaped limiting block are fixedly arranged on the inner surface of the first butt joint, and a clamping groove is formed in a space between the first L-shaped limiting block and the second L-shaped limiting block.

Preferably, the width of the spiral wall is 20cm, the thickness of the spiral wall is 30mm, and the spiral angle of the spiral wall is 30-40 degrees.

Furthermore, the follow-up protective cylinder body is made of a Q235 manganese steel plate with the thickness of 10mm by rolling with a plate rolling machine.

Compared with the prior art, the beneficial effects of the utility model are that: the spiral wall is arranged on the outer surface of the follow-up pile casing, so that the follow-up pile casing can more easily go deep into a sand and gravel stratum, and meanwhile, the repeated follow-up pile casing is pulled out in time in the construction process, thereby saving the engineering construction cost; according to the effect of using in a certain building site, the building site adopts a full-rotation construction method to carry out budget according to the existing scheme, the construction unit price is 2300 yuan per meter, and 9200 ten thousand yuan is consumed according to the total project measurement of 40000 meters; through adopting the utility model discloses a following up and protecting a section of thick bamboo and construction method after, the unit price of construction is 800 yuan per meter, only needs the cost 3200 ten thousand yuan according to 40000 meters's total engineering measurement, has practiced thrift 6000 ten thousand costs.

Drawings

Fig. 1 is a schematic structural view of a follow-up casing suitable for a sandy gravel stratum of the present invention;

fig. 2 is the structure diagram of the limiting bridge and the clamping block of the present invention.

In the figure: 1. follow-up protects a section of thick bamboo body, 2, first butt joint, 3, second butt joint, 4, fixture block, 5, draw-in groove, 6, spiral wall, 7, spacing bridge, 71, first locking hole, 72, second locking hole, 21, first L type stopper, 22, second L type stopper.

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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

the utility model provides a follow-up protects a section of thick bamboo suitable for sand cobble stratum, including at least a lesson follow-up protect a section of thick bamboo body 1, follow-up protect a section of thick bamboo body both ends to be first butt joint 2 and second butt joint 3 respectively, first butt joint 2 and second butt joint 3 set up can make two lessons follow-up protect a section of thick bamboo body 1 to meet, be provided with fixture block 4 on the second butt joint 3, be provided with on the 2 internal surfaces of first butt joint with 4 assorted draw-in grooves 5 of fixture block, follow-up protect and be provided with spiral wall 6 on a section of thick bamboo body 1 surface. In actual construction, when one section of follow-up pile casing is connected with another section, the first pair of joints 2 of the first section of follow-up pile casing is connected with a rotary excavating machine (not shown), the tail ends of the second pair of joints 3 are connected with a cutting tool (not shown), after the section of follow-up pile casing extends into a sand and gravel stratum for one section, the second pair of joints of the second section of follow-up pile casing is connected with the first pair of joints of the first section, when the joint is connected, clamping blocks on the second pair of joints are connected with clamping grooves on the first pair of joints in a clamping mode, then the first pair of joints of the second section of follow-up pile casing is connected with the rotary excavating machine, so that the rotary excavating machine drives the second section of follow-up pile casing to rotate and simultaneously drives the first section of follow-up pile casing to rotate, and the third section of follow-up pile casing and the fourth section of follow-up pile casing are connected in a analogizing mode. Because the spiral wall is arranged on the outer surface of the follow-up pile casing, the rotary drilling machine drives the follow-up pile casing to drill into the sandy gravel stratum like a ground drill, and the rotary drilling machine can more easily drive the follow-up pile casing to rotate into the sandy gravel stratum.

In order to better connect each section of follow-up protective casing, the disconnection between two sections of follow-up protective casings due to vibration in the drilling process is avoided, therefore, the second butt joint 3 is fixedly provided with the limiting bridge 7, the fixture block 4 slides under the limiting bridge 7, the two side walls of the limiting bridge 7 are provided with first locking holes 71 with the central axes on the same straight line, one end of the fixture block 4 is provided with a second locking hole 72, and the first locking holes 71 and the second locking holes 72 are fixed by adopting a pin shaft to penetrate through the limiting bridge 7 and the fixture block 4 when corresponding. Because the fixture block 4 is fixedly connected with the limiting bridge 7, and the dead weight of the lower section of the protective sleeve is added, the fixture block cannot be separated from the clamping groove.

As the utility model discloses preferred embodiment, fixed first L type stopper 21 and the second L type stopper 22 of being provided with on the first butt joint internal surface, space between first L type stopper 21 and the second L type stopper 22 forms draw-in groove 5, because fixture block 4 meets with draw-in groove 5 and can drive to follow the pile casing and rotate, has this section of thick bamboo of following of draw-in groove to obtain bigger revolving force. In order to make it easier for the drill to drill a sandy gravel layer when the follow-up casing rotates, the spiral angle of the spiral wall provided on the outer surface of the follow-up casing is set to 30 ° to 40 °, the width of the spiral wall is 20cm (i.e., the distance between the end of the spiral wall and the body of the follow-up casing), and the thickness is 30 mm. The follow-up protective cylinder body is made of a Q235 manganese steel plate with the thickness of 10mm by rolling with a plate rolling machine.

The application example is as follows:

taking the integral moving project of Guilin medical college as an example, the project stratum is located on the mountain road of the overlapped color area in Guilin city, the straight line distance is 1 kilometer away from the side of the dribble river, the project belongs to the original dribble river bed, the geological condition is a full cobble stratum, the grain size is different from 0.5 to 30 centimeters, the underground water level is the dribble water level, the water inflow is large, and the cobble stratum has no structural force.

The method comprises the steps of firstly, conveying an outer protective barrel with the inner diameter of 1500mm and the length of 6 meters below a stratum under vibration of a hydraulic hammer, wherein the outer protective barrel cannot be constructed in a follow-up mode, then forming an inner protective barrel with the length of 12 meters by four sections of follow-up protective barrels with the length of 3 meters under the vibration hammer, and the purpose is to adopt a large vibration hammer to follow up the protective barrel with manganese steel to break pebbles encountered in the process of descending the protective barrel. After the protective cylinder is in place, a crane is used for hoisting the steel reinforcement cage into the hole, then the guide pipe is installed, secondary hole cleaning is carried out when the thickness of sediments at the bottom of the hole is not in accordance with the requirement, and concrete can be poured after the sediment thickness is in accordance with the requirement. When the follow-up pile casing is taken out, the follow-up pile casing is firstly pulled up by 0.5 meter by a hydraulic hammer, concrete is continuously poured to a position which is two meters to six meters higher than the bottom end of the outer pile casing, then the follow-up pile casing is pulled up to enable the bottom end of the follow-up pile casing to be level with the bottom end of the outer pile casing, the outer pile casing is pulled out, and finally the concrete pouring of the residual pile foundation is completed. The project adopts a full-rotation construction method to carry out budget calculation according to the prior scheme, the construction unit price is 2300 yuan per meter, and 9200 ten thousand yuan is consumed according to the total project measurement of 40000 meters; through adopting the utility model discloses a following up and protecting a section of thick bamboo and construction method after, the unit price of construction is 800 yuan per meter, only needs the cost 3200 ten thousand yuan according to 40000 meters's total engineering measurement, has practiced thrift 6000 ten thousand costs.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a follow-up protects a section of thick bamboo suitable for sandy cobble stratum which characterized in that: including an at least section of thick bamboo body (1) of protecting of following, follow-up protects a body (1) both ends and is first butt joint (2) and second butt joint (3) respectively, the setting up of first butt joint (2) and second butt joint (3) can make two sections follow-up and protect a body (1) to meet, be provided with fixture block (4) on second butt joint (3), be provided with on first butt joint (2) internal surface with fixture block (4) assorted draw-in groove (5), be provided with spiral wall (6) on following a body (1) surface of protecting.

2. A follow-up casing suitable for use in a sandy and pebble formation as claimed in claim 1, wherein: fixed spacing bridge (7) of being provided with on second butt joint (3), fixture block (4) slide under spacing bridge (7), first locking hole (71) of central axis on same straight line are seted up to spacing bridge (7) both sides wall, fixture block (4) one end is provided with second locking hole (72), adopt the round pin axle to wear to establish when first locking hole (71) and second locking hole (72) correspond to fix spacing bridge (7) and fixture block (4).

3. A follow-up casing suitable for use in a sandy and pebble formation as claimed in claim 1, wherein: a first L-shaped limiting block (21) and a second L-shaped limiting block (22) are fixedly arranged on the inner surface of the first butt joint (2), and a clamping groove (5) is formed in the space between the first L-shaped limiting block (21) and the second L-shaped limiting block (22).

4. A follow-up casing suitable for use in a sandy and pebble formation as claimed in claim 1, wherein: the width of the spiral wall (6) is 20cm, the thickness of the spiral wall is 30mm, and the spiral angle of the spiral wall (6) is 30-40 degrees.

5. A follow-up casing suitable for use in a sandy and pebble formation as claimed in claim 1, wherein: the follow-up pile casing body (1) is made of a Q235 manganese steel plate with the thickness of 10mm by rolling with a plate rolling machine.