Strengthening of the Basic Soil (Sub Grade) of the Road Using Galam Piles

Banjarmasin City is situated on an alluvial soil type characterized by clay structures with a relatively low soil carrying capacity; hence, soil stabilization is required. The soil is stabilized using a variety of techniques. Stabilization techniques include using geotextiles, columns, sand stabilizing the soil itself, and stabilizing concrete mix. Implementation at the existing project site is stability stable pending catastrophe. In order the soil's carrying capacity, a depression is created at a predetermined distance beneath the soil, which is generally soft. The method of implementation utilized to assist in the preparation of this research includes data collecting and analysis of the obtained results. This evaluation's data sources consist of secondary data and data processing. By utilizing a static living load of 22.68 tons and the results of the calculation, it is determined that the load acting on the road construction is 33.2415 tons. The Schmertmann- Nottingham technique (1975) yielded a Qult Single of 1.245 and a Qgroup permit of 10.27 tonnes for the carrying capacity of the Galam woodGalam with a pile depth of 5 meters

Banjarmasin City is situated on an alluvial soil type characterized by clay structures with a relatively low soil carrying capacity; hence, soil stabilization is required.The soil is stabilized using a variety of techniques.Stabilization techniques include using geotextiles, columns, sand stabilizing the soil itself, and stabilizing concrete mix.Implementation at the existing project site is stability stable pending catastrophe.In order the soil's carrying capacity, a depression is created at a predetermined distance beneath the soil, which is generally soft.The method of implementation utilized to assist in the preparation of this research includes data collecting and analysis of the obtained results.This evaluation's data sources consist of secondary data and data processing.By utilizing a static living load of 22.68 tons and the results of the calculation, it is determined that the load acting on the road construction is 33.2415 tons.The Schmertmann-Nottingham technique (1975) yielded a Qult Single of 1.245 and a Qgroup permit of 10.27 tonnes for the carrying capacity of the Galam woodGalam with a pile depth of 5 meters

INTRODUCTION
Road transportation plays an important role in regional development.In addition, the current road traffic conditions are needed as a link from one area to another.The transportation system greatly influences the progress and development of a region.Along with the increase in traffic, various efforts were also made to meet the need for good road infrastructure.When constructing the road itself, it is necessary to consider alternative construction systems to be used depending on the conditions of the construction site.
South Kalimantan, especially the City of Banjarmasin, is an alluvial soil type area dominated by clay/clay structures with a relatively low soil carrying capacity, so it must be increased or repaired.One of the ways is the stabilization method, by using chemical mixtures or mixing other materials.Various methods are also used to stabilize the soil, such as stabilization using geotextiles; stabilization of the soil itself (stabilization); stabilization with columns; stabilization with cement mixture.While the implementation at this research location is stable with the galam wood niche.Because the soil beneath or the base is soft soil, which must be stabilized using Galam wood hollows at a certain distance, to provide strength or increase the carrying capacity of the subgrade.
Implementation at the current project site is stable with a rock creek.So the soil underneath, which is soft, is given a depression at a certain distance, so it is hoped that it can increase the carrying capacity of the soil.
The problem that usually arises from clay soil is its too high water content sensitivity, so it needs to be stabilized, including using additional chemicals as a mixture.For research in this project, using the natural-rich rock as an alternative to increasing the carrying capacity of clay soil which is the subgrade of the road construction.
Galam wood or often called cerucuk galam wood, is still quite abundant in South Kalimantan Province, especially at the road project site where this research is carried out, or in the Barito Kuala district, so it is quite easy to get and the price is still quite cheap when compared to chemical stabilization.like Portland cement.
It is hoped that after stabilization or strengthening of the road construction subgrade, the carrying capacity of the clay soil against traffic loads will increase, as well as being able to increase the value of the properties of the clay soil and be able to meet the criteria or requirements as a construction sub base.highway on the project.
The implementation approach employed as a supplement to the creation of this research includes data gathering and a review of the obtained results.Secondary data and data processing are the sources of information for this evaluation.
This research uses secondary data collected in the form of written information, including sondir data, hand-digging data, and soil inspection conclusion data.
Methods for data processing and calculation derived from pertinent literature include: 1. Determining carrying capacity using the

DISCUSSION
The tests that were performed yielded the following results: moisture content, weight, specific gravity, liquid limit, plastic limit, plastic index, hydrometer, direct shear, free strong press, and consolidation.

Table 1. Soil Inspection Conclusion Sondir Data
Sondir data was gathered from soil samples taken at a depth of 32.60 meters on Jl.Trans Kalimantan, Handil Bakti, Kec.Alalak, and Kab.Barito Kuala in South Kalimantan.

Handboring
In this instance, boring is done to a depth of 3.50m to study the soil layer at the designated depth.Referring to the load configuration table and road class, it is known that the road class in this research project is Class I arterial road with MST> 10 tons.Axle configurations and vehicle types for 1.2 to 2.2 trailers with a maximum weight of 42 tons can be found in the table of vehicles that can pass on class I highways.In light of this, the static live load used as a reference is weight = maximum total weight x % heaviest axis= 42ton x 54% = 22, 68 Total Load The static live load is 22.68 tons and the total load is 10.5615 tons according to the dead load calculation.The total burden is therefore 33.2415.

Calculation of the Bearing Capacity of the Cerucuk Galam Pole
In this research, the theoretical support will be calculated at a depth of 5 m utilizing sondir data and the Schmertmann-Nottingham method to determine its single-pile and group-bearing capacities (1975).Sondir Data Calculations at a 5 m Depth.Loading Schematic Cut Image

CONCLUSION
Clay soil characterizes the soil at the research site, resulting in a limited soil carrying capacity, Using deep ceurcuk piles driven directly into the subgrade to enhance the carrying capacity of the subgrade is one approach to strengthening the carrying capacity of the soil.The findings of the research.
As a consequence, utilizing 1,000 tons of free traffic, the load acting on the road body's construction is 33.24 tons.
By Having the calculation table of the bearing capacity of Galam wood cerucuk piles with a pile depth of 5 meters using the SCHMERTMANN-NOTTINGHAM technique (1975), Qult Single was determined to be 1.245 and Qgroup was permitted to be 10.27 tons.
According to the calculations, utilizing as many as 33 cerucuk galam piles with a load of 33.24 tons and dimensions of 3x11 feet, as well as a single Qizin pile weighing 0.28 tons.
Figure 1.Water Diagram Figure 2. Cross Section Source: Plan Drawing

Table 10 .
Calculation of Pole Bearing Capacity Cerucuk Source: Self Calculation Table