CN210597398U

CN210597398U - Dog-ear type two-phase underground continuous wall cold joint waterproof construction

Info

Publication number: CN210597398U
Application number: CN201920659081.4U
Authority: CN
Inventors: 薛光桥; 肖明清; 彭佳湄; 鲁志鹏; 邓朝晖; 梁艳; 罗驰恒
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-05-22
Anticipated expiration: 2029-05-09

Abstract

The utility model relates to a dog-ear type underground continuous wall cold joint waterproof construction in two stages, including dog-ear type underground continuous wall in two stages and the stake of drilling that is executed with the underground continuous wall homogeneous phase in two stages of dog-ear type underground continuous wall dog-ear department, dog-ear type underground continuous wall in two stages includes the preceding underground continuous wall and the later stage underground continuous wall that are 90 degrees dog-ears each other, the periphery of stake of drilling is tangent with preceding underground continuous wall and later stage ground wire continuous wall simultaneously, executes at the stake of drilling and accomplishes the back, clears away soil body and the mud skin between stake of drilling and the underground continuous wall in two stages, again to refill self-setting material in the stake of drilling, through self-setting material fills space between stake of drilling and stake and the underground continuous wall in two stages to form stagnant water reinforcing body.

Description

Dog-ear type two-phase underground continuous wall cold joint waterproof construction

Technical Field

The method relates to the field of constructional engineering, in particular to a cold joint waterproof structure of a bevel type two-stage underground diaphragm wall.

Background

With the gradual expansion of the development scale and depth of the underground space in China, the underground diaphragm wall is widely applied to the construction of the enclosure structure of underground engineering due to the advantages of strong foundation applicability, small construction influence, large wall rigidity and the like. Due to project planning or construction organization planning, the foundation pit excavation is implemented in stages. In the staged construction of the underground continuous wall, when the time interval of each stage of engineering is longer, cold joints are easy to form at joints. Joints such as I-steel or joint boxes pre-embedded in the underground diaphragm wall at the early stage have the problems of weak strength, large verticality deviation and the like, so that water leakage and even water burst at a cold joint are caused, and foundation pit safety accidents are caused.

Method content

In order to solve the technical problem, the utility model provides a dog-ear type two-phase underground continuous wall cold joint waterproof construction strengthens two-phase underground continuous wall cold joint department stagnant water effect under the prerequisite that reduces the influence to earlier stage structure. The technical scheme of the utility model as follows:

a cold joint waterproof structure of a folded angle type two-stage underground continuous wall comprises the folded angle type two-stage underground continuous wall and drilled piles which are arranged at the folded angle of the two-stage underground continuous wall and are tangent with the two-stage underground continuous wall, wherein self-setting materials are poured back into the drilled piles.

Furthermore, the structure also comprises a row of drilling secant piles tangent to the drilling piles at the periphery of the drilling piles, the drilling secant piles are meshed with each other, the first drilling secant pile is also tangent to the early underground continuous wall, the last drilling secant pile is also tangent to the later underground continuous wall, and the drilling secant piles are refilled with self-setting materials.

Further, the self-setting material is plain concrete or cement paste.

Further, the bored pile is implemented by a full-casing full-circle drilling machine.

Further, self-setting materials are filled between the drilled piles and the two-stage underground continuous wall.

Further, self-setting materials are filled between the drilling occlusive piles and the drilling piles and between the drilling occlusive piles, the drilling piles and the underground continuous wall.

The utility model has the advantages that:

due to the fact that the bored pile is large in rigidity and small in verticality deviation, cold joint water leakage and even water burst caused by failure or poor verticality of the embedded joint of the underground diaphragm wall in the early period can be effectively prevented, the waterproof quality of the cold joint is improved, and engineering risks are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor;

FIG. 1 is a schematic view of a cold joint waterproof structure of a dog-ear type two-stage underground diaphragm wall provided by an embodiment of the present invention;

fig. 2 is another angle-folding type two-stage underground continuous wall cold joint waterproof structure schematic diagram provided by the embodiment of the utility model.

Description of reference numerals: 1. the method comprises the steps of firstly, preparing an underground continuous wall, 2, later, preparing an underground continuous wall, 3, drilling piles, 4, cold joints, 5 and drilling secant piles.

Detailed Description

The technical solution in the embodiment of the present method will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present method, and it is obvious that the described embodiment is only a part of the present method, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the method without making any creative effort, fall within the protection scope of the method.

As shown in fig. 1, as a first embodiment of the present invention, there is provided a cold joint waterproof structure for a dog-ear type two-stage underground diaphragm wall, comprising a dog-ear type two-stage underground diaphragm wall and bored piles 3 formed at dog-ear portions of the two-stage underground diaphragm wall and cut along the two-stage underground diaphragm wall, the angle-folding type two-stage underground continuous wall comprises a first-stage underground continuous wall 1 and a later-stage underground continuous wall 2 which mutually form an angle of 90 degrees, the periphery of the bored pile 3 is tangent to the early underground diaphragm wall 1 and the late ground wire diaphragm wall at the same time, after the drilling pile is constructed, soil and mud skin between the drilling pile 3 and the two-stage underground continuous wall are removed, self-setting materials are poured back into the drilling pile 3, the bored pile and the space between bored pile 3 and the two-stage underground diaphragm wall are filled with the self-setting material, thereby forming a water-stop reinforcing body, and the shaded part shown in figure 1 is the bored pile after the self-setting material is back-poured.

Preferably, as shown in fig. 2, the structure further comprises a row of drilling occlusive piles 5 tangent to the drilling piles 3 at the periphery of the drilling piles 3, the drilling occlusive piles 5 are mutually occluded, the first drilling occlusive pile 5 is also tangent to the prior underground continuous wall 1, the last drilling occlusive pile 5 is also tangent to the later underground continuous wall 2, after the drilling occlusive piles 5 are completely constructed, soil or mud skin between the drilling occlusive piles and the drilling piles and between the drilling occlusive piles, the drilling piles and the underground continuous wall is removed, then self-setting materials are poured back into the drilling occlusive piles 5, and gaps among the drilling occlusive piles 5, the drilling occlusive piles and the drilling piles and between the drilling occlusive piles, the drilling piles and the underground continuous wall are filled with the self-setting materials, such as shaded parts shown in fig. 2.

Wherein the self-setting material is plain concrete or cement paste; and the drilled pile 3 and the drilled secant pile 5 are both implemented by a full-casing full-circle drilling machine.

The utility model discloses: the cold joint 4 of the folded angle type two-stage underground diaphragm wall is reinforced by the drilled pile 3, so that the water stopping effect of the cold joint 4 is ensured, and the influence on the early underground diaphragm wall can be reduced.

The utility model discloses a construction steps as follows:

step 1, drilling piles 3 tangent to the two-stage underground continuous wall are applied to the break corners of the break-angle type two-stage underground continuous wall;

step 2, removing soil and mud skin between the drilled pile 3 and the two-stage underground continuous wall;

and 3, recharging a self-setting material into the drilled pile 3, and filling the drilled pile and a gap between the drilled pile 3 and the two-stage underground continuous wall with the self-setting material to form a water-stopping reinforcing body.

And 4, constructing a row of drilling secant piles 5 tangent to the drilling piles 3 on the periphery of the drilling piles 3, mutually meshing the drilling secant piles 5, enabling the first drilling secant pile 5 to be tangent to the early underground continuous wall 1, enabling the last drilling secant pile 5 to be tangent to the later underground continuous wall 2, removing soil or mud between the drilling secant piles and the drilling piles and between the drilling secant piles, the drilling piles and the underground continuous wall after constructing the drilling secant piles 5, recharging self-setting materials into the drilling secant piles 5, and filling gaps among the drilling secant piles 5, the drilling secant piles and the drilling piles and between the drilling secant piles, the drilling piles and the underground continuous wall with the self-setting materials.

And a full-casing full-rotary drilling machine is used for constructing the drilled piles 3 and the drilled secant piles 5, and high-pressure gas nozzles are adopted for removing soil or mud skins between the drilled piles 3 and the two underground continuous walls, between the drilled secant piles and the drilled piles and between the drilled secant piles, the drilled piles and the underground continuous walls.

The method for recharging the self-setting material into the drilled pile 3 or the drilled interlocking pile 5 comprises the following steps: and (3) pulling out the sleeve of the drilled pile 3 or the drilled occlusive pile 5 while recharging the self-setting material.

Wherein the self-setting material is plain concrete or cement paste.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The cold joint waterproof structure of the angle-folded two-stage underground continuous wall is characterized by comprising the angle-folded two-stage underground continuous wall and drilled piles which are formed at the angle of the angle-folded two-stage underground continuous wall and are tangent with the two-stage underground continuous wall, wherein self-setting materials are poured back into the drilled piles.

2. The dog-ear type two-stage underground diaphragm wall cold joint waterproof construction according to claim 1, characterized in that the construction further comprises a row of drilling secant piles tangent to the drilling piles at the periphery of the drilling piles, the drilling secant piles are meshed with each other, the first drilling secant pile is also tangent to the former underground diaphragm wall, the last drilling secant pile is also tangent to the latter underground diaphragm wall, and the drilling secant piles are reinjected with self-setting materials.

3. The angle type two-stage underground diaphragm wall cold joint waterproof structure according to claim 1 or 2, wherein the self-setting material is plain concrete or cement paste.

4. The break-angle type two-stage underground diaphragm wall cold joint waterproof structure according to claim 1, wherein the bored pile is implemented by a full-casing full-circle drilling machine.

5. The cold joint waterproof structure for the dog-ear type two-stage underground diaphragm wall according to claim 1, wherein a self-setting material is filled between the bored pile and the two-stage underground diaphragm wall.

6. The angle type two-stage underground diaphragm wall cold joint waterproof structure according to claim 2, wherein self-setting materials are filled between the drilling secant pile and the drilling pile and between the drilling secant pile, the drilling pile and the underground diaphragm wall.